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1
Sinu, KJ, and Ranganathan G. "A PV FED Three Phase Switched Z-Source Multi Level Inverter for Induction Motor Drives." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 1 (2018): 24–28. https://doi.org/10.11591/ijeecs.v9.i1.pp24-28.
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Generally induction motor drives posses higher harmonic contents in line voltage and current due to high switching frequency used in inverters. Conventional induction motor drives employ two level voltage source inverters which has THD in level of 50%. This paper presents a switched z-source multilevel inverter which has voltage boosting capability and has lesser THD level in comparison with conventional two level voltage source inverters. This drive is fed from a photo voltaic source because of its voltage boosting capability. A single phase five level switched z-source inverter is initially designed and considered as single cell and three such cells are created for powering three phase induction motor. The proposed three cell PV source switched z-source multilevel inverter for three phase induction motor is simulated in MATLAB/Simulink software to verify merits of proposed IM drive.
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KJ, Sinu, and G. Ranganathan. "A PV FED Three Phase Switched Z-source Multi Level Inverter for Induction Motor Drives." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 1 (2018): 24. http://dx.doi.org/10.11591/ijeecs.v9.i1.pp24-28.
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<p>Generally induction motor drives posses higher harmonic contents in line voltage and current due to high switching frequency used in inverters. Conventional induction motor drives employ two level voltage source inverters which has THD in level of 50%. This paper presents a switched z-source multilevel inverter which has voltage boosting capability and has lesser THD level in comparison with conventional two level voltage source inverters. This drive is fed from a photo voltaic source because of its voltage boosting capability. A single phase five level switched z-source inverter is initially designed and considered as single cell and three such cells are created for powering three phase induction motor. The proposed three cell PV source switched z-source multilevel inverter for three phase induction motor is simulated in MATLAB/Simulink software to verify merits of proposed IM drive</p>
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Dr. Sujatha Balaraman,, P. Yogini. "Three Phase Eleven Level Modular Multilevel Inverter with PD-PWM for Grid Connected System." International Journal for Modern Trends in Science and Technology, no. 8 (August 7, 2020): 86–91. http://dx.doi.org/10.46501/ijmtst060816.
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The prominence of Modular Multilevel Inverters (MMI) is rising owing their merits of simple mechanical construction and good voltage sharing for semiconductor devices. Mostly Multilevel Inverters use more than one source; however, the effective use of all the sources at all levels is rare. Conventional Multilevel Inverters will diminish the energy efficiency of the conversion system. When compared to conventional multilevel inverter, Modular Multilevel Inverter with a high numbers of voltage levels seem to be the most suitable because of the use of an isolated dc source. This paper explores a three-phase eleven level modular multilevel inverter with phase disposition pulse width modulation technique (PD-PWM) that can extract power from all the sources at all the levels. Besides, this paper develops a synchronous d-q reference frame controller to control the current of 11kV. When compared with Reduced Switch Count based Multilevel Inverter Series/Parallel switching topologies, the Modular Multilevel Inverter provides better Total Harmonic Distortion (THD) of output voltage and utilization factor.
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Durafe, Asha. "MatlabSimulink Model of Sinusoidal PWM For Three-Phase Voltage Source Inverter." International Journal of Trend in Scientific Research and Development Volume-2, Issue-6 (2018): 753–55. http://dx.doi.org/10.31142/ijtsrd18614.
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Mangroliya, Divyeshkumar G., and Girish V. Jadhav. "Implementation On Three Phase Voltage Source Inverter With 1500 Conduction Mode." Indian Journal of Applied Research 1, no. 12 (2011): 89–90. http://dx.doi.org/10.15373/2249555x/sep2012/32.
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Asha, Durafe. "Matlab Simulink Model of Sinusoidal PWM For Three Phase Voltage Source Inverter." International Journal of Trend in Scientific Research and Development 2, no. 6 (2018): 753–55. https://doi.org/10.31142/ijtsrd18614.
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This paper concentrates on modeling and simulation of single phase inverter as a frequency changer modulated by sinusoidal Pulse Width Modulation PWM technique. An inverter is a circuit that converts DC sources to AC sources. To judge the quality of voltage produced by a PWM inverter, a detailed harmonic analysis of the voltage waveform is done. Pulse width modulated PWM inverters are among the most used power electronic circuits in practical applications. These inverters are capable of producing ac voltages of variable magnitude as well as variable frequency with less harmonic distortion. The model is executed utilizing MATLAB Simulink software with the SimPower System Block Set using PC simulation. MATLAB Simulink is a successful instrument to examine a PWM inverter. Major reasons for using MATLAB are Faster reaction, accessibility of different simulation devices and the nonappearance of joining issues. In this paper, Insulated Gate Bipolar Transistor IGBT is used as switching power device. IGBT is ideal since it high switching speed and also high input impedance. Finally a MATLAB SIMULINK model for the SPWM is presented. Various simulation results are also included. Asha Durafe "Matlab/Simulink Model of Sinusoidal PWM For Three-Phase Voltage Source Inverter" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: https://www.ijtsrd.com/papers/ijtsrd18614.pdf
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Kim, Jaechang, Sangshin Kwak, and Seungdeog Choi. "Impacts of SiC-MOSFET Gate Oxide Degradation on Three-Phase Voltage and Current Source Inverters." Machines 10, no. 12 (2022): 1194. http://dx.doi.org/10.3390/machines10121194.
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In this paper, the performance variations of SiC MOSFET-based voltage and current source inverters under gate oxide degradation are studied. It is confirmed that the turn-on and turn-off delays of SiC MOSFETs change significantly by high electric field stress, which accelerates the gate oxide degradation. Variations in the turn-on and turn-off delays of switching devices extend or reduce the duty error of voltage source inverters and current source inverters. The performance variations of the voltage and current source inverter due to the duty error changes caused by the gate oxide degradation are analyzed through simulations. As a result, the gate oxide degradation worsens the performance of the voltage source inverter. Furthermore, the negative gate oxide degradation, which lowers the threshold voltage, decreases the performance of the current source inverter.
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G., V. V. Nagaraju, and Sambasiva Rao G. "Three-phase five-level CHB inverter fed induction motor for renewable applications." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 3 (2020): 1145–52. https://doi.org/10.11591/ijpeds.v11.i3.pp1145-1152.
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This paper presents the three-phase CHB inverter fed induction motor suitable for renewable energy source applications. Normally, all present existing multilevel inverters produce multilevel output, but the number of components required is more, bulk in size, more in cost. Which are more burdens to small capacity renewable sources. These challenges are eliminated in CHB inverter. This CHB mainly consisting of one DC source, one capacitor and eight switches in each phase. To generate a five-level output in phase to ground voltage, it is required to maintain the capacitor voltage (V2) at fifty percent of the DC source voltage (V1). This capacitor voltage is regulated by a sensor less voltage regulating technique. The sensor less voltage regulation works without any sensor devices. We can implement this technique with very less cost compared to other techniques. The sensor less voltage regulation is realized by level-shifted sinusoidal pulse width modulation. The simulation results show a very good dynamic performance. Controller maintains the capacitor voltage at fifty percent of the source voltage irrespective of main source voltage changes and load changes. Inverter generates a five-level wave at the output from line to ground and seven-level wave from line to line with fewer Harmonic. It is implemented in matlab/simulink and showing good dynamic performance.
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Meraj, Sheikh Tanzim, Nor Zaihar Yahaya, Kamrul Hasan, et al. "Three-Phase Six-Level Multilevel Voltage Source Inverter: Modeling and Experimental Validation." Micromachines 12, no. 9 (2021): 1133. http://dx.doi.org/10.3390/mi12091133.
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This research proposes a three-phase six-level multilevel inverter depending on twelve-switch three-phase Bridge and multilevel DC-link. The proposed architecture increases the number of voltage levels with less power components than conventional inverters such as the flying capacitor, cascaded H-bridge, diode-clamped and other recently established multilevel inverter topologies. The multilevel DC-link circuit is constructed by connecting three distinct DC voltage supplies, such as single DC supply, half-bridge and full-bridge cells. The purpose of both full-bridge and half-bridge cells is to provide a variable DC voltage with a common voltage step to the three-phase bridge’s mid-point. A vector modulation technique is also employed to achieve the desired output voltage waveforms. The proposed inverter can operate as a six-level or two-level inverter, depending on the magnitude of the modulation indexes. To guarantee the feasibility of the proposed configuration, the proposed inverter’s prototype is developed, and the experimental results are provided. The proposed inverter showed good performance with high efficiency of 97.59% following the IEEE 1547 standard. The current harmonics of the proposed inverter was also minimized to only 5.8%.
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Kim, Jaechang, Minh-Hoang Nguyen, Sangshin Kwak, and Seungdeog Choi. "Lifetime Extension Method for Three-Phase Voltage Source Converters Using Discontinuous PWM Scheme with Hybrid Offset Voltage." Machines 11, no. 6 (2023): 612. http://dx.doi.org/10.3390/machines11060612.
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This paper proposes a lifespan extension technique for three-phase voltage inverters using hybrid offset voltage. The proposed method lengthens the inverter lifetime by independently adjusting the switching frequency of the three phases in accordance with the aging degree. To reduce the switching operation of the phase with the shortest lifetime, the proposed technique injects the offset voltage for generalized discontinuous pulse-width modulation PWM (GDPWM) into the reference voltage in the region where the switching operation of the shortest lifespan phase can be stopped. When the switching operation does not need to be stopped, the offset voltage for space vector PWM (SVPWM) is injected into the reference voltage for high inverter load current quality. An offset voltage that varies according to the need to stop the switching operation is the proposed hybrid offset voltage. Using the proposed hybrid offset voltage, the switching frequencies of the three phases are independently controllable. In addition, since only the switching operation of the phase having the shortest lifespan is reduced, the load current quality in accordance with the switching operation reduction is good compared to the conventional method to simultaneously diminish all phase switching frequencies. The proposed method significantly increases the reliability of the three-phase voltage inverter, where the thermal stress of the phase having the shortest lifespan is decreased up to 55%, whereas the inverter lifetime can be increased by 10 times. The proposed technique was verified by simulations and experiments.
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Mohammad, Arif Khan, and Kumar Gupta Shailesh. "Simulation study of pulse width modulation schemes for three-phase impedance source inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 3 (2022): 1478–85. https://doi.org/10.11591/ijpeds.v13.i3.pp1478-1485.
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To avoid a short circuit of the input direct current (DC). source, a 3-phase inverter cannot run two switches in the same leg at a time, and it always operates in buck mode, with the output voltage being less than the input voltage. The Impedance source inverter features a feature that allows both switches in one leg to operate at the same time, and it can operate in buck/boost mode, which means the output voltage can be greater than the input voltage depending on the shoot-through time. In the literature, there are a few pulse width modulation (PWM) techniques for Impedance source inverter control. This research includes a simulation study as well as an examination of existing PWM schemes in the literature, as well as a proposal for TESVPWM for inverters. The inverter performance has evaluated using total harmonic distortion and fundamental components, validating by simulation findings.
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Nagaraju, G. V. V., and G. Sambasiva Rao. "Three-phase five-level CHB inverter fed induction motor for renewable applications." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (2020): 1145. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1145-1152.
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<p><span lang="EN-US">This paper presents the three-phase CHB inverter fed induction motor suitable for renewable energy source applications. Normally, all present existing multilevel inverters produce multilevel output, but the number of components required is more, bulk in size, more in cost. Which are more burdens to small capacity renewable sources. These challenges are eliminated in CHB inverter. This CHB mainly consisting of one DC source, one capacitor and eight switches in each phase. To generate a five-level output in phase to ground voltage, it is required to maintain the capacitor voltage (V2) at fifty percent of the DC source voltage (V1). This capacitor voltage is regulated by a sensor less voltage regulating technique. The sensor less voltage regulation works without any sensor devices. We can implement this technique with very less cost compared to other techniques. The sensor less voltage regulation is realized by level-shifted sinusoidal pulse width modulation. The simulation results show a very good dynamic performance. Controller maintains the capacitor voltage at fifty percent of the source voltage irrespective of main source voltage changes and load changes. Inverter generates a five-level wave at the output from line to ground and seven-level wave from line to line with fewer Harmonic. It is implemented in matlab/simulink and showing good dynamic performance.</span></p>
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SINCHUK, Igor, and Maryna KOTIAKOVA. "STUDY OF NON-SYMMETRICAL MODES OF THREE-PHASE FOUR-WIRE NETWORKS WITH DISTRIBUTED GENERATION." Herald of Khmelnytskyi National University. Technical sciences 313, no. 5 (2022): 233–37. http://dx.doi.org/10.31891/2307-5732-2022-313-5-233-237.
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The use of distributed generation electric energy sources allows efficient use of energy resources, including available renewable energy sources, contributes to the reduction of harmful emissions during traditional electric energy generation, improves the quality of electric energy for consumers and reduces overloading of transmission lines. Meanwhile, if the load supplied by the source of distributed generation is asymmetrical, then the voltage at the zero point of the inverter interface feeding the neutral conductor can deviate quite noticeably from the set level. The easiest way to provide a neutral point for connecting the neutral conductor is to use two capacitors with balancing resistors connected in parallel to them, that is, to create a zero voltage by dividing the total voltage of the direct current link in half. Circuits with voltage separation in the direct current circuit are widely used in electric drives with three-level energy converters, since in this case there is no need to connect the zero point of the direction to the load, and the main purpose of this electrical circuit is to obtain equal halves of the total voltage in the direct current circuit. This will lead to asymmetry of the output voltage, that is, to a decrease in its quality, the presence of significant constant components in alternating voltages, as well as to the flow of a significant current in the neutral conductor. In this regard, a three-dimensional space-vector pulse-width modulation method was proposed for controlling a four-arm inverter, which differs from the existing ones by the possibility of minimizing the components of negative and zero-sequence voltages in networks with distributed generation with parallel connection of three- and four-arm inverters . To develop approaches to control the inverters of such systems, it is necessary to obtain analytical dependencies that describe the flow of active and reactive power between inverters depending on the parameters of their generated output voltages.
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Vijayan, Vasanthi, and S. Ashok. "Hybrid Control for Bidirectional Z-Source Inverter for Locomotives." Advances in Power Electronics 2015 (February 15, 2015): 1–9. http://dx.doi.org/10.1155/2015/264374.
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Electric traction uses three phase locomotives in main line services. Three phase locomotives consist of voltage source inverters for driving the traction motors. This paper proposes a hybrid algorithm for bidirectional Z-source inverters in accelerating region of operation of locomotives. The speed control method adopted is same as that in the existing three phase locomotives which is variable voltage variable frequency. Bidirectional Z-source inverter is designed for getting the same output power as in voltage source inverter fed locomotives. Simulation is done in all regions of traction speed curve, namely, acceleration, free running, and braking by regeneration. The voltage stress across the devices and modulation index are considered while analyzing the proposed control algorithm. It is found that the modulation index remains at a high value over the entire range of frequencies. Due to the higher value of modulation index the harmonics in the inverter output voltage is reduced. Also the voltage stress across devices is limited to a value below the device rating used in the present three phase locomotives. A small scale prototype of the bi-directional Z-source inverter fed drive is developed in the laboratory and the hybrid control was verified in the control topology.
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G., V. V. Nagaraju, and Sambasiva Rao G. "Three phase PUC5 inverter fed induction motor for renewable energy applications." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 1 (2020): 1–9. https://doi.org/10.11591/ijpeds.v11.i1.pp1-9.
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This paper gives the overview three phase 5 level packed U cell (PUC5) inverter fed Induction Motor feed from renewable energy sources for electric vehicles and water pump set in agriculture applications. PUC5 inverter requires a minimum number of semiconductor devices, one PV panel and only one capacitor in each phase. Maximum all possible switching sequences are analyzed and sensor less voltage balancing technique depending on simple switching modes was integrated as level shifted PWM controller for control the PUC5 inverter switches. Sensor less voltage balancing fixes the capacitor voltage (Vc) at half of the PV source (Vdc) magnitude in each phase, which results the symmetric five level wave in phase voltage output and seven level waveform in line voltage with less harmonics. This topology minimizes the complication in the control system which creates the PUC5 inverter most suitable for industrial applications and market requirements. It is compared with other popular multilevel inverters In terms of component count, voltage rating, voltage balancing and complexity etc. In order to test the performance proposed PUC inverter it is tested with rated load with Matlab/Simulink. The results obtained have shown good dynamic performance under different conditions.
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Singh, Laxmi, and Dr Imran. "Performance Analysis of Three-Phase Inverter Using Different Techniques for the Grid- Connected Pv System." Journal of University of Shanghai for Science and Technology 23, no. 06 (2021): 1682–98. http://dx.doi.org/10.51201/jusst/21/06458.
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The model of a three-phase voltage source inverter is examined based on space vector theory. SVPWM offers an improved outcome with the inverter as compared to the conservative SPWM technique for the inverter. There is a 15.5% upsurge in the line voltage of the inverter. SVPWM better exploits the available DC-link power with the SVPWM inverter. It has been revealed that the SVPWM method utilizes DC bus voltage extra competently and produces a smaller amount of harmonic distortion and easier digital realization in a three-phase voltage-source inverter. For converter‘s gating signals generation, the space-vector pulse width modulation (SVPWM) strategy lessens the switching losses by restricting the switching to two-thirds of the pulse duty cycle. A hypothetical study regarding the use of the SVPWM the three-level voltage inverter and simulation results are offered to prove the usefulness of the SVPWM in the involvement in the switching power losses lessening, output voltages with fewer harmonics. Nevertheless, despite all the above-cited benefits that SVPWM enjoys over SPWM, the SVPWM technique used in three-level inverters is more difficult on account of a large number of inverter switching states. The attained simulation outcomes were satisfactory. As prospects, future experimental works will authenticate the simulation results. A software simulation model is developed in Matlab/Simulink.
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Selvaperumal, M., and D. Kirubakaran. "A narrative 3-phase 9-level voltage source inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 4 (2020): 1866. http://dx.doi.org/10.11591/ijpeds.v11.i4.pp1866-1871.
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A tale technique for a 3-stage nine-level voltage source inverter utilizing sixteen switches is presented. The given system utilizes ordinary 3-stage scaffolds of two-level as a diode braced model. A DC interface voltage is provided so that the fell H-connect produces the nine voltage levels. The exchanging designs are expressed as the levels expand then the example is hard to create three-stage yields with key balance procedures. Here an answer for an a-level inverter to create required voltage-level with less power electronic parts by setting up in the look-into tables. This investigation diagrams the correlations between nine-level voltage source inverters in various arrangements and proposed novel, sixteen switch three-stage inverter structured with a smaller number of intensity electronic parts and reenacted in MATLAB/Simulink.
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M., Selvaperumal, and Kirubakaran D. "A narrative 3-phase 9-level voltage source inverter." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 4 (2020): 1866–71. https://doi.org/10.11591/ijpeds.v11.i4.pp1866-1871.
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A tale technique for a 3-stage nine-level voltage source inverter utilizing sixteen switches is presented. The given system utilizes ordinary 3-stage scaffolds of two-level as a diode braced model. A DC interface voltage is provided so that the fell H-connect produces the nine voltage levels. The exchanging designs are expressed as the levels expand then the example is hard to create three-stage yields with key balance procedures. Here an answer for an a-level inverter to create required voltage-level with less power electronic parts by setting up in the look-into tables. This investigation diagrams the correlations between nine-level voltage source inverters in various arrangements and proposed novel, sixteen switch three-stage inverter structured with a smaller number of intensity electronic parts and reenacted in MATLAB/Simulink.
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Khan, Mohammad Arif, and Shailesh Kumar Gupta. "Simulation study of pulse width modulation schemes for three-phase impedance source inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 3 (2022): 1478. http://dx.doi.org/10.11591/ijpeds.v13.i3.pp1478-1485.
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To avoid a short circuit of the input direct current (DC). source, a 3-phase inverter cannot run two switches in the same leg at a time, and it always operates in buck mode, with the output voltage being less than the input voltage. The Impedance source inverter features a feature that allows both switches in one leg to operate at the same time, and it can operate in buck/boost mode, which means the output voltage can be greater than the input voltage depending on the shoot-through time. In the literature, there are a few pulse width modulation (PWM) techniques for Impedance source inverter control. This research includes a simulation study as well as an examination of existing PWM schemes in the literature, as well as a proposal for TESVPWM for inverters. The inverter performance has evaluated using total harmonic distortion and fundamental components, validating by simulation findings.
20
Hossameldin, Abdelsalam, Ibrahim, and Williams. "Enhanced Performance Modified Discontinuous PWM Technique for Three-Phase Z-Source Inverter." Energies 13, no. 3 (2020): 578. http://dx.doi.org/10.3390/en13030578.
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Various industrial applications require a voltage conversion stage from DC to AC. Among them, commercial renewable energy systems (RES) need a voltage buck and/or boost stage for islanded/grid connected operation. Despite the excellent performance offered by conventional two-stage converter systems (dc–dc followed by dc–ac stages), the need for a single-stage conversion stage is attracting more interest for cost and size reduction reasons. Although voltage source inverters (VSIs) are voltage buck-only converters, single stage current source inverters (CSIs) can offer voltage boost features, although at the penalty of using a large DC-link inductor. Boost inverters are a good candidate with the demerit of complicated control strategies. The impedance source (Z-source) inverter is a high-performance competitor as it offers voltage buck/boost in addition to a reduced passive component size. Several pulse width modulation (PWM) techniques have been presented in the literature for three-phase Z-source inverters. Various common drawbacks are annotated, especially the non-linear behavior at low modulation indices and the famous trade-off between the operating range and the converter switches’ voltage stress. In this paper, a modified discontinuous PWM technique is proposed for a three-phase z-source inverter offering: (i) smooth voltage gain variation, (ii) a wide operating range, (iii) reduced voltage stress, and (iv) improved total harmonic distortion (THD). Simulation, in addition to experimental results at various operating conditions, validated the proposed PWM technique’s superior performance compared to the conventional PWM techniques.
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Komrska, Tomáš, and Tomáš Glasberger. "Pulse Width Modulation of Three Phase Inverters Based on Linear Programming." TRANSACTIONS ON ELECTRICAL ENGINEERING 8, no. 3 (2020): 44–48. http://dx.doi.org/10.14311/tee.2019.3.044.
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Traditional three-phase voltage-source inverters supplied by constant dc-link voltage usually utilize the space vector PWM to achieve maximum output voltage. This paper deals with optimization of inverter leg voltages using linear programming method. System definition is based on the relationship between the known voltage vector, which is demanded by an upper control loop and the unknown leg voltages which enter the carrier-based PWM block as modulation signals. A slack variable is introduced to the system as minimization objective, defining border for all leg voltages. Optimization procedure minimizes leg voltage maxima, and thus, the maximum utilization of the dc-link voltage is ensured. The theoretical assumptions have been verified by simulations as well as by experiments on laboratory prototype.
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Goriparthi, V. V. Nagaraju, and Gudapati Sambasiva Rao. "Three phase PUC5 inverter fed induction motor for renewable energy applications." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 1 (2020): 1. http://dx.doi.org/10.11591/ijpeds.v11.i1.pp1-9.
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<p>This paper gives the overview three phase 5 level packed U cell (PUC5) inverter fed Induction Motor feed from renewable energy sources for electric vehicles and water pump set in agriculture applications. PUC5 inverter requires a minimum number of semiconductor devices, one PV panel and only one capacitor in each phase. Maximum all possible switching sequences are analyzed and sensor less voltage balancing technique depending on simple switching modes was integrated as level shifted PWM controller for control the PUC5 inverter switches. Sensor less voltage balancing fixes the capacitor voltage (V<sub>c</sub>) at half of the PV source (V<sub>dc</sub>) magnitude in each phase, which results the symmetric five level wave in phase voltage output and seven level waveform in line voltage with less harmonics. This topology minimizes the complication in the control system which creates the PUC5 inverter most suitable for industrial applications and market requirements.<strong> </strong>It is compared with other popular multilevel inverters In terms of component count, voltage rating, voltage balancing and complexity etc. In order to test the performance proposed PUC inverter it is tested with rated load with Matlab/Simulink. The results obtained have shown good dynamic performance under different conditions.</p>
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Shi, Ji Ying, Shuang Dong, and Wen An Liu. "A Three Phases Z-Source Inverter Topology." Advanced Materials Research 712-715 (June 2013): 1746–50. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1746.
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Now Z-Source inverter is replacing traditional inverter and becoming a research focus. But traditional Z-source inverters bring high voltage stress both in DC input and the Z-source network, which restricts its wide application. In order to solve this problem, a new type Z-source structure with third harmonic injection control strategy is proposed in this paper. The principle and operation models are analyzed. Compared with traditional boost-type Z-Source topologies, the proposed topology offers lower voltage stress, whats more, soft-start strategy can be implemented to suppress the inrush surge arising in the start process. Finally, simulation results demonstrate the good performance of the proposed inverter.
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Priyanka, Yadav Ashok Kumar Sharma Ayushi Jain. "DESIGN AND ANALYSIS OF THREE-PHASE SPLIT SOURCE INVERTER." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 8 (2016): 88–94. https://doi.org/10.5281/zenodo.59958.
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In many DC-AC power conversions a voltage source inverter (VSI) along with an additional DC-DC boosting stage is required. To overcome this problem in VSI, a split source inverter is preferred. This paper presents a combination of boost stage and VSI stage as a single unit DC-AC power conversion named as split source inverter (SSI). The proposed topology require three additional diodes with same number of active switches of VSI and eight same states of conventional pulse width modulation. This work present the analysis of SSI with sinusoidal pulse width modulation technique. The developed SSI model is simulated on MATLAB/SIMULINK environment. Simulation results have been obtained for inverter voltage, inductor current, output line current and total harmonic distortion of output line current.
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Al – Naimi, Khalid. "Controlling the Direct Connected Parallel Three-Phase Voltage Source Inverters by Using Neural networks." Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), no. 1 (October 25, 2021): 1–22. http://dx.doi.org/10.55562/jrucs.v24i1.460.
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This paper demonstrates that neural networks can be used effectively for the controlling the direct connection of parallel three-¬phase voltage source inverters..A unique feature of the parallel three-phase inverters is a zero--sequence circulating current. This work proposes a new zero-sequence control for parallel three- phase voltage source inverter using a neural networks to assist the Proportional-Integral controller against the variation on the two inverters to maintain the value of a zero-sequence current within an acceptable value. The controller of the zero-sequence current can be implemented within an individual inverter and it is independent of the other control loops of the inverter, therefore, it greatly facilitates design and expansion of parallel system.Simulation and results can be obtained by using mathematical software such as MATLAB version seven to show the performance of the controllers and the closed loop system.Two-layers feedforward neural networks FNN's containing a Levenberg-Marquardt training algorithm are used.
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Edwin Deepak, F. X., and V. Rajasekaran. "Three phase z-source neutral point clamped inverter with multicarrier PWM technique." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 35, no. 5 (2016): 1575–91. http://dx.doi.org/10.1108/compel-04-2016-0131.
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Purpose The purpose of this paper is to present the three phase seven-level Z-source neutral point clamped (NPC) inverter with multicarrier pulse-width modulation (PWM) technique. Despite numerous topologies and modulation methods, there is a dire need of developing PWM techniques that can be deployed in multilevel inverters. These inverters decrease the total harmonic distortion and it has a good performance for various electrical power system applications. The proposed inverter is investigated for its performance by executing it in shoot through and non-shoot through modes. Design/methodology/approach The purpose is validated through MATLAB/Simulink software platform for implementing the proposed seven-level Z-source NPC inverter outlined with multicarrier based phase disposition technique. The experimental results are verified using SPARTAN 3E FPGA controller with the same control strategy. Findings The efficiency of the proposed inverter is confirmed in terms of increased and faster conversion in the shoot-through mode. By using PDPWM technique the maximum boost gain is achieved with lower modulation index. High control of DC voltage is obtained with only one DC voltage source and one Z network. Originality/value Three phase multilevel inverters are widely used in improving the output voltage quality and reducing the encountered electromagnetic interference in electronic device or circuitry. They are employed in medium and high –power applications to attain increased power ratings while decreasing the switching losses. The performance results shown in this paper will satisfy the above needs of usage in certain applications and less switching losses.
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Ebrahim, Essamudin Ali, and Abuelmaaty M. Ali. "Performance and Tracking Control of Three-Phase Induction-Motor Drive Fed from a DC-Modified Nano-grid." WSEAS TRANSACTIONS ON POWER SYSTEMS 16 (March 3, 2021): 8–21. http://dx.doi.org/10.37394/232016.2021.16.2.
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Nowadays, induction motor (IM) can be used in tracking systems to follow a predefined path like in robotics and servos. The modified nanogrid is a small scalable-renewable energy intermittent source that powers loads via a single-stage inverter (SSI). Higher utilization of the inverter dc-link voltage improves its output voltage and dependently, the performance of the motor tracking speed. So, this paper proposed a switched boost inverter (SBI) to feed IM from PV-source to boost its dc-link output voltage. The usage SBI utilizes minimum passive components, more active elements, introduces shot-through mode as z-source inverter and produces both ac and dc voltages simultaneously. The performance of the motor-tracking speed depends directly on the motorstator voltage. So, the proposed method depends mainly on two parameters to verify the pre-defined trajectory speed. The first proposed intention is a simple algorithm for a closed-loop dc-link boosting control based-on the reference model to compute the optimum duty ratio (D). The second one depends mainly on the modulation index (M) to produce the reference signals needed to adjust the speed of the motor through a (voltage/frequency) control of a predefined value. The modelling and validation of the proposed system was implicit with the help of Matlab/ Simulink package. The robustness of the system has been tested by selecting several speed trajectories and was able to track them. Furthermore, SBI-based system was compared with other VSI-inverter techniques such as the space-vector PWM single- and two-stage VSI inverters. Test results explored that the SBI-based system is a strong competitor to other inverter techniques especially at low-voltage intermittent supply.
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Gai, Zhi Wu, Shi Sheng Yan, and Ai Qi Wei. "Study of Three-Phase Full Bridge Spwm VSI." Applied Mechanics and Materials 246-247 (December 2012): 403–7. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.403.
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In order to reveals the dynamic, nonlinear work process of three-phase SPWM inverter, simulation model of three-phase full bridge voltage source SPWM inverter was built. Typical figure of voltage, current and spectrum was given and analyzed. Figures include line voltage of load, phase voltage of load, neutral point voltage of load, source current wave, Fourier analysis, Total Harmonic Distortion of voltage and current, inverter input impedance, line to line impedance. This Simulation model and results can be used as auxiliary in teaching, scientific research and product development. This simulation model was intuitive, commutative, being able to display graphs dynamically. Using this simulation model in class, the difficult in teaching three-phase full bridge SPWM inverter will be solved, it can also advance students’ studying interests and strengthen their understanding and save class hours. This simulation model has important value.
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Tackie, Samuel Nii, and Ebrahim Babaei. "Modified Topology for Three-Phase Multilevel Inverters Based on a Developed H-Bridge Inverter." Electronics 9, no. 11 (2020): 1848. http://dx.doi.org/10.3390/electronics9111848.
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This paper proposes a modified three-phase inverter from the developed H-bridge structure having multilevel functionality. The proposed topology can generate 7-levels of phase voltages and 13-levels of line voltages. Simple control methods such as fundamental frequency control method can be applied to the proposed topology. By adding three single-phase transformers, galvanic isolation is created for use in three-phase Dynamic Voltage Restorer systems. The proposed three-phase inverter utilizes less number of components; dc sources, semiconductor switches and driver circuits. Lower rated power switches with reduced blocking voltages are also used. These attributes make the proposed topology less complex in-terms of architecture and control. Comprehensive analysis of the proposed three-phase multilevel inverter and other presented topologies are investigated with respect to levels of output voltage, driver circuit quantity, dc voltage count, total component quantity and standing voltage. Details of the appropriate control technique employed is explained. Finally, practicability of the proposed inverter is validated by simulation using EMTDC/PSCAD software and experimental prototype.
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Chavan, Gayatri, and Sridhar S. "Speed Control of Dual Induction Motor Using Five Leg Inverter." E3S Web of Conferences 184 (2020): 01065. http://dx.doi.org/10.1051/e3sconf/202018401065.
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Over the past decade, research efforts have been made to decrease the number of power electronic devices needed in multi-motor drive systems in order to condense the overall complication and cost of the drive. This paper proposes speed control for a dual three-phase induction motor system driven by five-leg voltage source inverter (FL-VSI) which is used in industrial manufacturing processes. Industrial applications frequently need a number of variable speed electric drives. This technique uses five-leg inverter instead of using conventional two three phase inverters. In the majority of cases, these multi-motor drive systems need independent control of individual motors. It is shown recently that it is possible to separately control two three-phase induction machines supplied through a five-leg voltage source inverter, with one inverter leg being common to both machines. The entire performance of the speed control for the five leg voltage source inverter fed dual-motor drive system is investigated using MATLAB/SIMULINK software.
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Kaddour, Benyoucef, Noureddine Henini, Abdelhalim Tlemçani, and Mohamed Allali. "Efficient control of three-phase cascaded multilevel Z-Source inverter using SHEPWM technique." STUDIES IN ENGINEERING AND EXACT SCIENCES 5, no. 1 (2024): 334–53. http://dx.doi.org/10.54021/seesv5n1-020.
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This paper presents an enhanced control strategy for three-phase cascaded multilevel Z-source inverters, focusing on the implementation of Selective Harmonic Elimination Pulse Width Modulation (SHEPWM) techniques to improve efficiency. Z-source inverters are gaining prominence in various applications due to their inherent advantages, such as increased voltage boost capability and inherent shoot-through protection. However, achieving optimal control in cascaded multilevel configurations poses challenges that this study seeks to address. The proposed control strategy optimizes the switching patterns of the inverter, thereby enhancing its overall performance. It allows for precise control over the output voltage and reduces harmonic distortion, ensuring the inverter operates efficiently across varying load conditions. The research methodology involves a comprehensive analysis of the proposed technique, including its mathematical modeling and simulation using advanced software tools. Performance metrics such as total harmonic distortion, efficiency, and transient response are evaluated to quantify the improvements achieved. The results obtained demonstrate the efficiency of the proposed control strategy. This method significantly reduces harmonic distortion in the output voltage, leading to improved power quality. Furthermore, the efficiency of the inverter is enhanced, making it suitable for applications demanding high-performance power conversion.
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Madzlan, Noor Aqilah, Noor Syafawati Ahmad, Ahmad Afif Nazib, Jenn Hwai Leong, and Yaow-Ming Chen. "Analysis Study of Fast Dynamic Response for Three-Phase Voltage Source Inverter." Journal of Advanced Research Design 122, no. 1 (2024): 208–18. https://doi.org/10.37934/ard.122.1.208218.
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The power inverter is a crucial device employed within power grids to convert direct current (DC) into alternating current (AC). In the context of high-power grid-connected photovoltaic (PV) power generation systems, three-phase inverters have demonstrated superiority over their single-phase counterparts. Specifically, a three-phase voltage source inverter (VSI) is employed for this application. The VSI operates with a consistent input voltage while ensuring that the output voltage remains unaffected by changes in the load. However, the conventional three-phase VSI has a notable drawback. Continuous voltage and current monitoring in each phase are required to maintain synchronous operation between the power inverter and the PV-power generation system. The conventional synchronous checking procedure is relatively complex, which affects the inverter's dynamic performance. Checking for synchronisation takes time and pushes the inverter to use a more advanced controller. This sophisticated controller is crucial to evaluate the control algorithm’s performance using the dynamic operation. To address these challenges, a current control strategy has been integrated into this project by implementing the synchronous reference frame current control (SRFCC) method with the proportional-integral (PI) controller. Furthermore, a synchronous reference frame phase-locked loop (SRF-PLL) is implemented in grid phase synchronisation to maintain a high-quality regulated current output. The effectiveness of this controller has been evaluated through simulations conducted using the PSIM software, providing insights into its operational behaviours and effectiveness within the project's context. According to the results obtained, it has been identified that the current control strategy with the three-phase grid-connected VSI that has been implemented in this paper is a fast dynamic response compared to the conventional inverter. The fast dynamic response inverter can reduce as much as 7.5% of the time required by the injected current to change from half-rated current to full-rated current and 2.5% of the time required by the injected current to change from full-rated current to half-rated current.
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Qi, Xiaojing, and Jianyong Zheng. "VSG Control for Cascaded Three-Phase Bridge Based Battery Inverter." World Electric Vehicle Journal 14, no. 8 (2023): 203. http://dx.doi.org/10.3390/wevj14080203.
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With the increasing number of new energy sources connected to the grid, the unbalanced output of three-phase grid-connected inverters and the lack of no inertia and damping characteristics in the traditional microgrid control system will seriously affect the stability of voltage, frequency, and power angle for microgrids. This paper proposes a novel cascaded three-phase bridge inverter topology for the battery system used for the electric vehicle. Compared with traditional cascaded H-bridge inverters, the proposed multilevel inverter can achieve self-adaptive balance for three phases. The mathematical model of a cascaded three-phase bridge inverter is established in this paper. Based on the voltage and current equations of a multilevel inverter, a new modulation strategy named carrier phase-shifted-distributed pulse width modulation (CPSD-PWM) was developed, which is more suitable for cascaded three-phase bridge inverters. The harmonic analytic equations of carrier phase-shifted pulse width modulation (CPS-PWM) and CPSD-PWM are constructed by the double Fourier analysis method. Compared with the traditional PWM modulation strategy, the CPSD-PWM can reduce the output harmonics and improve the balance of the three-phase output, which can realize the three-phase adaptive balance in the cascaded three-phase bridge inverter. This paper develops a cascaded three-phase bridge multilevel power converter system based on the virtual synchronous generator (VSG) control strategy. The voltage and frequency of inverter output can be accurately controlled in both island mode and grid-connected mode through active power-frequency regulation and reactive power–voltage regulation, and the stability of primary frequency regulation for the multilevel microgrid inverter can be improved by collaborative optimization of virtual inertia and virtual damping. The CPSD-PWM modulation strategy and VSG control strategy are verified by the simulation results and experimental data for the cascaded three-phase bridge inverter.
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Seong-Cheol, Kim, Narasimha S., and Reddy Salkuti Surender. "A new multilevel inverter with reduced switch count for renewable power applications." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 4 (2020): 2145–53. https://doi.org/10.11591/ijpeds.v11.i4.pp2145-2153.
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This paper proposes a new technique for a voltage source multilevel inverter (MLI) with reduced switch count, and it creates a smoother sinusoidal output waveform with reduced total harmonic distortion (THD). Therefore, the proposed technique identifies a better position in the list of multilevel converters used for power quality conditioners. Semiconducting devices are added to it if the number of levels increases. In this work, the topology of MLI with reduced number of switches is presented. A new MLI is proposed with lower number of switches and sources in order to achieve higher level. The proposed topology is framed out with the combination of three half bridge and a single H-bridge configuration. Detailed simulation results for 15-level inverter of single and three phase inverters are presented in this paper. Three phase 15-level inverter is developed by employing three isolated different renewable sources and 21 switches.
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Salem, Ahmed, Emad M. Ahmed, Mohamed Orabi, and Mahrous Ahmed. "New Three-Phase Symmetrical Multilevel Voltage Source Inverter." IEEE Journal on Emerging and Selected Topics in Circuits and Systems 5, no. 3 (2015): 430–42. http://dx.doi.org/10.1109/jetcas.2015.2462173.
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Sakina, Ammari, Benaboud Aziza, and Talea Mohamed. "PI-based PLL and 24-sector control of a 3P-3L-NPC inverter for grid-tied PV system synchronization." International Journal of Applied Power Engineering 11, no. 3 (2022): 179~185. https://doi.org/10.11591/ijape.v11.i3.pp179-185.
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This article addresses one of the most serious issues in electricity: frequency and voltage anomalies. Actually, because renewable energy production is intermittent, the frequency and voltage of electricity produced are unstable and dependent on weather conditions. This issue causes industrial processes to fail, affecting the quality of the electrical supply and having a massive economic impact. Power electronics inverters are designed to compensate for system fluctuations in solar power generation. However, measurement noise in the grid voltage desynchronizes the inverter and network signals. The authors propose using a phase-locked loop technique based on inverter period control and a network voltage observer to achieve such synchronization of grid-connected photovoltaic (PV) systems. In this work, the grid integration of the PV system is carried out through a three-phase three-level neutral point clamped inverter due to better current quality with fewer harmonics and lower stress voltage of the inverter's components when compared to two-level voltage source inverters. The method is successfully applied in a simulated case study and experimental results validate it.
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S., Lahari*1 &. D. Narmitha2. "SIMULATION OF MODIFIED OCC CONTROLLER FOR THREE PHASE BOOST TYPE GRID CONNECTEDINVERTER WITH PHOTOVOLATIC ARRAY." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 9 (2017): 424–32. https://doi.org/10.5281/zenodo.892145.
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Now-a-days serious concerns have been raised over the fossil fuel electricity generation, because it pollutes our environment and depletes the energy supply. As a result alternative energy sources such as solar energy and fuel cells have gained great attention because they are friendly to the environment and flexible for installation. In this paper, the one cycle control (OCC) method and the pulse width modulation (PWM) method have been proposed for a three phase boost type grid connected inverter. A cost effective maximum power point tracking method (MPPT) integrated within the OCC. When integrated with a three phase boost type inverter, the proposed method tracks MPP with good precision and solar power is converted into three phase ac power with a single phase power stage. One stage inverters for low dc voltage to high ac voltage conversion have been reported for non-grid connected inverters based on the topology of a current source inverter. The output current of the inverter can be adjusted according to the voltage of the photovoltaic array so as to extract the maximum power from it. Compared with previously proposed approaches, this OCC method preserves the advantages of simple circuitry, good stability, fast dynamic response and maximum power point tracking (MPPT) function can be conveniently integrated into the control core.
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Gupta, Ranitesh, and Kuldeep Sahay. "Comparative analysis of THD for square-wave inverter at different conduction modes." International Journal of Applied Power Engineering (IJAPE) 12, no. 3 (2023): 312–20. https://doi.org/10.11591/ijape.v12.i3.pp312-320.
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This paper proposes conduction schemes for the most common six-switch voltage sources inverter. Also, a comparative study of the output THD for different conduction modes of switches for a three-phase square wave inverter is done, as the harmonic content of any electrical system is important to analyze its performance. The harmonic distortion of the load voltage and load current is taken as the main constraint to evaluate the performance of the three-phase inverter. So, control strategies for various loads are executed for different modulation schemes of inverter switches using MATLAB/Simulink software. Obtained results show that 150° conduction gives the least THD for output current, and 170° conduction gives the least THD for output voltage for three-phase inverters. Also, harmonic contents are reduced using a passive LC filter at the output of the inverter.
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Wang, Baocheng, and Wei Tang. "A New CUK-Based Z-Source Inverter." Electronics 7, no. 11 (2018): 313. http://dx.doi.org/10.3390/electronics7110313.
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This paper proposes a new three-switch single-phase Z-source inverter (ZSI) based on a CUK converter, which is named a CUK-based ZSI. This topology has characteristics of buck‒boost capability and dual grounding. In addition, the voltage gain of proposed inverter is higher than those of the single-phase quasi-Z-source and semi-Z-source inverters. Aside from that, a simple control method is presented to achieve the linear voltage gain. The operational principle of the proposed topology is described. Finally, a performance evaluation is carried out and the test results verify the effectiveness of the proposed solution.
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Lim, Jeong-Woo, Hanyoung Bu, and Younghoon Cho. "Novel Dead-Time Compensation Strategy for Wide Current Range in a Three-Phase Inverter." Electronics 8, no. 1 (2019): 92. http://dx.doi.org/10.3390/electronics8010092.
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This paper proposes a novel three-phase voltage source inverter dead-time compensation strategy for accurate compensation in wide current regions of the inverter. In particular, an analysis of the output voltage distortion of the inverter, which appears as parasitic components of the switches, was conducted for proper voltage compensation in the low current region, and an on-line compensation voltage controller was proposed. Additionally, a new trapezoidal compensation voltage implementation method using the current phase was proposed to simplify realizing the trapezoidal shape of the three-phase compensation voltages. Finally, when the proposed dead-time compensation strategy was applied, the maximum phase voltage magnitude in the linear modulation voltage regions was defined to achieve smooth operation even at high modulation index. Simulations and experiments were conducted to verify the performance of the proposed dead-time compensation scheme.
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Alnamer, Saddam Shueai, Saad Mekhilef, Hazlie Mokhlis, and Nadia M. L. Tan. "A Novel Multilevel DC-Link Three-Phase T-Type Inverter." Energies 13, no. 16 (2020): 4186. http://dx.doi.org/10.3390/en13164186.
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This research proposes a four-level T-type inverter that is suitable for low-power applications. The presented topology outranks other types of inverters in terms of a smaller number of semiconductor devices, absence of passive components such as clamping diodes and flying capacitors, low switching and conduction losses, and high efficiency. The proposed topology is free from voltage deviation and unbalanced voltage occurrences that are present in other multilevel converters having clamping diodes or flying capacitors. The proposed inverter can extend to N levels using unequal dc-link voltage sources for medium-voltage application. The inverter employs the simple fundamental frequency staircase modulation technique. Moreover, this paper presents a current commutation strategy to prevent the occurrences of short circuit and minimizing the number of required switching devices and switching transitions, resulting in improving the efficiency of the inverter. This paper also analyses the theoretical converter losses showing lower switching and conduction losses when compared to existing four-level inverters. The experimental validation of the proposed inverter shows its operating feasibility and a low output voltage THD.
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Daputra, Mamal, and Zulwisli Zulwisli. "SIX-STEP INVERTER UNTUK MENGENDALIKAN MOTOR 3 FASA ARUS SEARAH TANPA SIKAT BERBASIS ARDUINO." Voteteknika (Vocational Teknik Elektronika dan Informatika) 7, no. 4 (2020): 20. http://dx.doi.org/10.24036/voteteknika.v7i4.106377.
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This research is motivated by the many needs in the use of electric motors. Electric motors with DC voltages that are often used today are less effective and efficient because of the use of brushes that will run out when used. To overcome the weaknesses of this DC motor, then used Brushless Direct current Motor (MASTS). MASTS is a three phase AC motor. In a fixed application, a three phase AC voltage source can be used directly. In a mobile application, it takes an AC voltage sourced from a DC voltage. For this reason, an inverter is designed to convert DC voltage into three phase AC. The method in controlling MASTS is a six-step inverter that is changing the DC voltage to AC voltage in the form of a box or trapezoid. This inverter uses MOSFET IRF3205 and Arduino microcontroller. To find out the performance of the inverter, MOSFET driver voltage measurements, measurement of the output current, and measurement of the resulting MASTS speed. From the measurement results, when the voltage is increased the current in the circuit and the speed of the MASTS will increase. Keywords: Inverter, MASTS, Phase, Six-Step.
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Berg, Matias, and Tomi Roinila. "Dynamic Effect of Input-Voltage Feedforward in Three-Phase Grid-Forming Inverters." Energies 13, no. 11 (2020): 2923. http://dx.doi.org/10.3390/en13112923.
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Grid-connected and grid-forming inverters play essential roles in the utilization of renewable energy. One problem of such a converter system is the voltage deviations in the DC-link between the source and the inverter that can disrupt the inverter output voltage. A common method to prevent these voltage deviations is to apply an input-voltage feedforward control. However, the feedforward control has detrimental effects on the inverter dynamics. It is shown that the effect of the feedforward in the input-to-output dynamics is not ideal due to the delay in the digital control system. The delay affects the input-to-output dynamics at high frequencies, and only a minor improvement can be achieved by low-pass filtering the feedforward control signal. Furthermore, the feedforward control can remarkably affect the inverter input admittance, and therefore, impedance-based stability problems may arise at the DC interface. This paper proposes a method based on linearization and extra element theorem to model the effect of the feedforward control in the inverter dynamics. Experimental measurements are shown to demonstrate the effectiveness of the proposed model.
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Zahoor, Muhammad Ishtiaq, Muhammad kamran Liaquat Bhatti, Waqar Tahir, Muhammad Kashif, Safdar Raza, and Muhammad Usman Haider Khan. "Predictive Control of Three Phase Inverter for Different Conduction Modes with Filter." Pakistan Journal of Engineering and Technology 3, no. 2 (2020): 151–56. http://dx.doi.org/10.51846/vol3iss2pp151-156.
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Three-phase inverters are commonly employed in higher power industrial applications like UPS, control of various motor, wind power conversion system as well as in different industrial processes. Three-phase switching inverter is a control electronics device that converts the direct supply (DC supply) into three-phase AC supply. In this paper, switching based 3- phase voltage source power electronic inverter is proposed with 3-different conduction modes. 3-phase switching inverter has been designed for the grid system in MATLAB Simulink. Three different modes of its operation 1200, 1500 and 1800 have been evaluated. Simulation results of the 3-phase inverter with filter and without filter have been presented & both line-to-line and line-to-neutral voltage waveform results are evaluated. The main objective of this research is to design an efficient power electronics inverter for domestic and industrial purposes and comparison of its different conduction modes like 1200, 1500 and 1800.
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Srikanth, Mr G., Mr J. Nagaraju, Ms K. Anusha, and Mr K. . Srihari. "A Low Harmonic Control Method of Bi-Directional Three- Phase Z- Sources." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 09, no. 03 (2025): 1–9. https://doi.org/10.55041/ijsrem43246.
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Three-phase Z-source inverters offer a voltage boosting solution of single-stage topology. They can also operate bidirectionally as rectifiers, hence have excellent potential for applications in the area of transportation electrification like Vehicle-to-Grid (V2G) chargers. In this paper, three new modulation schemes for three-phase Z-source converters are presented and analyzed. The best performed one is further extended to a closed-loop PI control technique. Although the voltage conversion ratio is adjustable, the output voltage. Total Harmonics Distortion (THD) is less than 3% between the voltage ratio range of 0.5 to 2.5. The effectiveness of the developed method has been completely verified in MATLAB/Simulink simulations and RT- LAB Hardware-In-Loop (HIL) experiments according to the real-time simulator OPAL-RT OP4510. The proposed one is compared with conventional control techniques operates better with lower harmonics, adjustable voltage gains, and less complex control algorithm. Index Terms—Z-source converter, Bi-directional converter, shoot-through states, voltage harmonics, closed-loop control. Key Words: Z-source inverter, power electronics, vehicle-to-grid (V2G), renewable energy, three-phase inverter, low harmonic control, power conversion efficiency, bidirectional operation.
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Nnadi, D. B. N., S. E. Oti, and C. I. Odeh. "Cascaded single-phase, PWM multilevel inverter with boosted output voltage." Nigerian Journal of Technology 39, no. 2 (2020): 589–99. http://dx.doi.org/10.4314/njt.v39i2.30.
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Splitting of a dc voltage source with two capacitors has been the approach in generating 5-level output voltage with single- and three-phase full-bridge circuits and added bidirectional switch. Associated with this configuration is the problem of voltage imbalance between the splitting capacitors. In addition, the inverter output voltage magnitude is obviously limited to the value of the split input voltage source. Presented in this paper is a unit topology for single-phase 5-level multilevel inverter, MLI. It simply consists of a full-bridge circuit, a capacitor, charge-discharge unit and a dc source. The charge-discharge unit with the capacitor is the interface between the full-bridge and the dc source. The proposed unit cell can generate a 5-level output voltage waveform whose peak value is twice the input voltage value. For higher output voltage level, a cascaded structure of the developed unit cell is presented. Comparing the proposed inverter with CHB inverter and some recent developed MLI topologies, it is found that the proposed inverter configuration generates higher output voltage value, at reduced component-count, than other topologies, for a specified number of dc input voltages. For two cascaded modules, simulation and experimental verifications are carried out on the proposed inverter topology for an R-L load.
 Keywords: Cascaded multilevel, Inverter, total harmonic distortion, topologies, waveform
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Chau, Minh Thuyen, Hoai Thuong Nguyen, and Khac Tung Truong. "Integrated compensation model using a three-phase neutral point clamped inverter." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 5 (2020): 5074–82. https://doi.org/10.11591/ijece.v10i5.pp5074-5082.
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Normally, when research on active compensation models, previous studies only assumed that the source of harmonics is nonlinear load. The nonlinear load here is fixed and balanced, the supply voltage is considered ideal, i.e. the three-phase source is balanced and there is no distortion. However, in reality, the above assumption is difficult to achieve. Therefore, this paper aims to design an integrated compensation model for different types of harmonic sources. The types of harmonic sources considered here include: harmonic sources generated from nonlinear load and source. The requirement of the integrated compensation model is to create a balanced three-phase voltage at the terminal of the load and the supply current must be a sinusoidal wave in phase with the source voltage. In order to reduce the loss caused by the inverter switching, this paper uses a three-level Neutral Point Clamped inverter. The simulation results performed on Psim software have demonstrated the effectiveness of the proposed integrated compensation model compared to the traditional integrated compensation model in reducing harmonics and stabilizing DC-bus voltage.
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Rizky, Aprylianto Susilo, Aurel Riyanto Ikhsan, and Amalia Vira. "Single Phase Inverter Design for Solar Panel Output Voltage." International Journal of Current Science Research and Review 07, no. 01 (2024): 666–72. https://doi.org/10.5281/zenodo.10566345.
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Abstract : Inverter is a devices that functions to convert DC input voltage to AC. One technique for optimizing the inveter output is SPWM. In this final project, a single–phase SPWM inverter with bipolar SPWM switching is designed. This inverter has 1 phase H-Bridge spesifications, with IGBT components, resistors, warehouse and inductors where there are 4 MOSFETs that can be connected. By carrying out 3 test with different sources for a 244.44 volt DC source it produces 0,47 % harmonic, a variable DC source produces 54,81 % harmonics and for a PV sources 9,91 % harmonics. Of the three test, the largest harmonic value is by using a variable DC source. Large harmonic can affect the shape of the wave to be non-sine and the wave has lots of ripples. This simulation aims to facilitate the design of real inverter devices.
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Zeng, Lin Suo, and Hong Yu Liu. "The Simulation of SPWM in Voltage Source STATCOM." Advanced Materials Research 614-615 (December 2012): 887–90. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.887.
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The inverter part is an important link of the voltage source STATCOM, and a key problem of inverter is how to generate PWM switch signals according to given parameter. The part of SPWM inverter in STATCOM was simulated in Matlab. The result shows that the inverter bridge was controlled by the three-phase pulse width modulation wave produced by the SPWM and the three-phase sine wave at the side of the inverter bridge is outputted. This method is suitable for studying of the STATCOM system.
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N, Prakash, and Balaji V.R. "Three phase voltage source inverters with grid connected industrial application." International Journal of Engineering & Technology 7, no. 4 (2018): 18. http://dx.doi.org/10.14419/ijet.v7i2.9.9653.
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The grid-connected issue is one of the major problems in the field of Power Electronics. In this paper, the Three Phase Voltage Source Inverter (VSI) is controlled by a Space Vector Pulse Width Modulation (SVPWM) Technique. SVPWM control technique and Park transformation, the managed inverter control system to convert input DC power into AC power, stabilize the output voltage and current, and feeds the excess power to the utility grid can be achieved by controllers. Usually, the grid source contains higher level of harmonics. To analyze the harmonics, nonlinear load is connected externally in the point of common coupling. The main aim of this paper is to modeling, simulation and experimental study of the three-phase grid connected inverter. By using the control algorithm, the grid sides Total Harmonics Distortion (THD) are controlled to the 1.54% for 800V DC as per the IEEE standard. The stimulation results such as AC output voltage and current, inverter system power flow, and grid disturbances detection signals, proves the effectiveness of the developed control algorithm. The control algorithms to makes the for this inverter outputs is pure sinusoidal.