Journal articles: 'Impedance source type inverter'

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Chinmay V., Deshpande, Deshpande Chaitanya V., and Deokar Sanjay A. "Performance Evaluation of Dynamic Voltage Restorer Based on Transformer-based Z Source Inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 3 (2017): 1101. http://dx.doi.org/10.11591/ijpeds.v8.i3.pp1101-1108.

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In this paper, latest technology is introduced in substitution to conventional voltage and current type inverter with Transformer based impedance (Z) source inverter in voltage sag assessment and mitigation and compared with voltage source inverter based dynamic voltage restorer. Transformer based impedance source inverters (Trans-Z source inverters) are newly proposed inverters that can be used to overcome downside of voltage source inverter, current source inverter and impedance source (Z-source) inverter. T-Z source inverter consists of transformer with high frequency and low leakage inductance along with low reactive component compared with conventional Z source inverter. In case of T-Z source inverter, voltage stress throughout Z-source capacitor is reduced along with inrush current limitation at startup. This paper presents modeling of T-Z source inverter based dynamic voltage restorer using MATLAB/SIMULINK software along with its THD analysis which is compared with VSI based dynamic voltage restorer. Here abc to dq0 control algorithm is employed. The control technique which is employed for simulation shows excellent results for voltage sag and swell compensation.

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Periyanayagam, Madasamy, Suresh Kumar V, Bharatiraja Chokkalingam, Sanjeevikumar Padmanaban, Lucian Mihet-Popa, and Yusuff Adedayo. "A Modified High Voltage Gain Quasi-Impedance Source Coupled Inductor Multilevel Inverter for Photovoltaic Application." Energies 13, no. 4 (2020): 874. http://dx.doi.org/10.3390/en13040874.

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The quasi-impedance source inverters/quasi-Z source inverters (Q-ZSIs) have shown improvement to overwhelmed shortcomings of regular voltage-source inverters (VSIs) and current-source inverters (CSIs) in terms of efficiency and buck-boost type operations. The Q-ZSIs encapsulated several significant merits against conventional ZSIs, i.e., realized buck/boost, inversion and power conditioning in a single power stage with improved reliability. The conventional inverters have two major problems; voltage harmonics and boosting capability, which make it impossible to prefer for renewable generation and general-purpose applications such as drive acceleration. This work has proposed a Q-ZSI with five-level six switches coupled inverter. The proposed Q-ZSI has the merits of operation, reduced passive components, higher voltage boosting capability and high efficiency. The modified space vector pulse width modulation (PWM) developed to achieve the desired control on the impedance network and inverter switching states. The proposed PWM integrates the boosting and regular inverter switching state within one sampling period. The PWM has merits such as reduction of coupled inductor size, total harmonic reduction with enhancing of the fundamental voltage profile. In comparison with other multilevel inverters (MLI), it utilizes only half of the power switch and a lower modulation index to attain higher voltage gain. The proposed inverter dealt with photovoltaic (PV) system for the stand-alone load. The proposed boost inverter topology, operating performance and control algorithm is theoretically investigated and validated through MATLAB/Simulink software and experimental upshots. The proposed topology is an attractive solution for the stand-alone and grid-connected system.

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Sellakumar, S., and M. Vijayakumar. "T Source Inverter Based Shunt Active Filter with LCL Passive Filter for the 415V 50 Hz Distribution systems." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 2 (2015): 268. http://dx.doi.org/10.11591/ijpeds.v6.i2.pp268-273.

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The inverter topology is being used as an active filter to reduce the harmonics in the power system. The traditional voltage source or current source inverters are having the disadvantages of limited output voltage range hence it may not be able to supply enough compensating currents during heavy switching surges, Vulnerable to EMI noise and the devices gets damaged in either open or short circuit conditions and the main switching device of VSI and CSI are not interchangeable. The active filters are the type of DC-AC system with wide range of voltage regulation and integration of energy storages is often required. This cannot be achieved with conventional inverters and hence the impedance source inverters have been suggested. The T source inverters are basically impedance source inverters which can be used as an active filter in the power system. The MATLAB simulation is done and the results are discussed in this paper for both the types. The proposed dampening system is fully characterized by LCL based passive filters and T source inverter based shunt active filter. The disturbances in the supply voltage and load current due to the non linear loads are observed in the simulation. The same is studied after connecting the designed hybrid shunt active filter in the distribution system. The simulation results obtained from the proposed method proves that it gives comparatively better THD value.

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Balamurugan, Chinnapettai Ramalingam, P. Vijayakumar, and T. Sengolrajan. "A novel impedance source fed H-type flying capacitor multilevel inverter." International Journal of Advances in Applied Sciences 8, no. 3 (2019): 225. http://dx.doi.org/10.11591/ijaas.v8.i3.pp225-231.

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In this paper, simulation using MATLAB/SIMULINK is performed with bipolar triangular fixed amplitude multi-carrier Phase Disposition (PD) PWM strategy with sine wave, Third Harmonic Injection, 60 degree Pulse Width Modulation and stepped wave reference for the chosen impedance Source based H-Type flying capacitor Multilevel Inverter (ISBH-Type FCMLI). The root means square value of the fundamental component and Total Harmonic Distortion of the output voltage which are the most important performance indices for the chosen inverter topologies are evaluated presented and compared for various references through duty ratios. From the simulation results it is observed that for various references the THD is almost similar but the root mean square value in terms of voltage is more for THI, 60 degree PWM and stepped wave reference with phase disposition strategy. The results are obtained for ma (amplitude modulation index) &lt; 1 (under amplitude modulation index), ma=1 (normal amplitude modulation index) and ma &gt; 1 (over amplitude modulation index).

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Cao, Wu, Kangli Liu, Shunyu Wang, Haotian Kang, Dongchen Fan, and Jianfeng Zhao. "Harmonic Stability Analysis for Multi-Parallel Inverter-Based Grid-Connected Renewable Power System Using Global Admittance." Energies 12, no. 14 (2019): 2687. http://dx.doi.org/10.3390/en12142687.

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Multi-parallel grid-connected voltage source inverters (VSIs) are widely applied in the fields of renewable energy, energy storage, harmonic suppression, etc. However, these inverters may cause harmonic stability problems due to the interactions among the grid-connected inverters through the grid impedance, which can seriously threaten system stability. The impedance-based stability criterion provides an effective tool for analyzing harmonic instability issues and can be divided into two types, namely, a ratio type and a sum type. Based on the existing studies of the sum-type criterion, this paper further proposes a new sum-type form based on the global admittance from the PCC to assess system stability through frequency-domain analysis. This global admittance-based stability criterion can be used not only to analyze system stability, but also to reveal the influence of each VSI unit on system stability with a lower computational burden and provide guidance for resonance suppression, especially in the case of a large number of grid-connected inverters and asymmetric inverter parameters. Finally, a MATLAB/Simulink model and 400 kVA/400 V experimental platform consisting of six grid-connected VSIs were established, and the corresponding results are presented to verify the effectiveness of the proposed method.

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Nguyen, Minh-Khai, Tan-Tai Tran, and Firuz Zare. "An Active Impedance-Source Three-Level T-Type Inverter With Reduced Device Count." IEEE Journal of Emerging and Selected Topics in Power Electronics 8, no. 3 (2020): 2966–76. http://dx.doi.org/10.1109/jestpe.2019.2927727.

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Barrero-González, Fermín, Carlos Roncero-Clemente, María Isabel Milanés-Montero, et al. "Improvements on the Carrier-Based Control Method for a Three-Level T-Type, Quasi-Impedance-Source Inverter." Electronics 8, no. 6 (2019): 677. http://dx.doi.org/10.3390/electronics8060677.

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The boost feature that characterizes Z-source and quasi-Z-source converters is usually achieved by means of a proper insertion of short-circuit states in the full DC-link. In this work, a novel pulse width modulation carrier-based strategy for a three-phase, three-level T-type, quasi-Z-source inverter is introduced, based on the addition of alternate short-circuits in the two halves of the DC-link bus. This technique achieves better performance, less electromagnetic interference, and lower harmonic distortion of the output line-to-line voltage compared to the traditional methods based on the full DC-link shoot-through. At the same time, generating the switching states is to easy implement. The proposed strategy permits the use of electronic devices with lower blocking voltage capability, thus improving converter reliability, size, and cost. The new method may be implemented in another multilevel inverter with an impedance-source network as well. A comprehensive simulation study is performed in order to validate the adopted method, with different inverter input voltages, which is taken as representative of a photovoltaic array. Comparisons are conducted with conventional strategy insertions using the same topology in order to show the improvements achieved.

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Jammy, Ramesh Rahul, Kirubakaran Annamalai, and Chinmay Kumar Das. "Operation, Control and Verification of Seven-Level Quasi-Z-Source-Based T-Type Inverter." Journal of Circuits, Systems and Computers 29, no. 02 (2019): 2050023. http://dx.doi.org/10.1142/s0218126620500231.

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In this paper, a novel seven-level Quasi-Z-Source-based [Formula: see text]-type inverter (7L[Formula: see text]qZST[Formula: see text]) is proposed. The proposed inverter is an upgrade of Quasi-Z-source (qZs) network and seven-level [Formula: see text]-type inverter. The 7L qZST[Formula: see text] comprises of three qZs-based impedance networks, two bidirectional switches and an [Formula: see text]-bridge inverter. It owns the advantages of reduced switch count, improved output voltage gain, enhanced reliability and better quality of output voltage and current. The performance of the proposed topology is tested for two different pulse width modulation techniques based on shoot-through control. The first technique offers simple control and operated at a fixed shoot-through duty cycle for realizing output voltage level. The second technique facilitates independent control of each qZs network dc-link voltage and they can be operated at different shoot through duty cycle which overcomes the limitation of first technique with better quality in output voltage. The detailed operation of the proposed topology and control schemes have been elaborated for different switching states for each output voltage level generation. Extensive simulation and experimentation are performed for both the switching schemes to verify their performance under steady state and dynamic conditions. Furthermore, a brief comparison is constructed to highlight the merits of the proposed inverter with conventional topologies.

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Liu, Hongchen, Xi Su, and Junxiong Wang. "High Step-up Coupled Inductor Inverters Based on qSBIs." Energies 12, no. 15 (2019): 3032. http://dx.doi.org/10.3390/en12153032.

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In this paper, two types of high step-up coupled inductor inverters based on qSBIs (quasi- switched boost inverters) are proposed. By applying the coupled inductor to the qSBIs, the voltage gain of the proposed inverter is regulated by turn ratio and duty ratio. Thus, a high voltage gain can be achieved without the circuits operating at the extreme duty cycle by choosing a suitable turn ratio of the coupled inductor. In addition, the proposed circuits have the characteristics of continuous input current and low voltage stress across the passive components. A boost unit can be added to the proposed inverters for further improvement of the voltage gain. In this paper, the working principle, steady state analysis, and the comparisons of the proposed inverter with other impedance-source inverters are described. A 200 W prototype was created and the experimental results confirm the correctness of the analysis in this paper.

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Saleem, Muhammad, Muhammad Hanif Ahmed Khan Khushik, Hira Tahir, and Rae-Young Kim. "Robust L Approximation of an LCL Filter Type Grid-Connected Inverter Using Active Disturbance Rejection Control under Grid Impedance Uncertainty." Energies 14, no. 17 (2021): 5276. http://dx.doi.org/10.3390/en14175276.

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High-order filters, such as LCL, are more commonly employed in grid-connected inverters (GcIs) as an interference element for the better attenuation of switching harmonics. However, LCL filters may have resonance poles and antiresonance zeros in the frequency response with inverter side current. This may affect the stability of the system and limit the control bandwidth with the simple single-loop PI control. This becomes severe with the introduction of grid impedance due to the large distance between renewable energy sources and the power grid. To mitigate this effect, active damping and sensorless damping is preferred with pre-information about grid impedance. In this paper, linear active disturbance rejection control (ADRC) is introduced, first to L filter type GcI and later extended to LCL filter type GcIs with minimum modification. From the frequency analysis, it is shown that the characteristics of the proposed control scheme remain the same even with a change in filter order and grid impedance. The resonance poles and antiresonance zeros in the LCL filter are compensated via the pole–zero cancelation technique. In addition to this, the preserve bandwidth, simple control design, and decoupled current control are also achieved with the proposed method. The robustness of the proposed method is compared with the single-loop PI control under different filter types and grid impedance uncertainty through MATLAB simulation and experimental outcomes.

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Chub, Andrii, Dmitri Vinnikov, Oleksandr Korkh, Tanel Jalakas, and Galina Demidova. "Wide-Range Operation of High Step-Up DC-DC Converters with Multimode Rectifiers." Electronics 10, no. 8 (2021): 914. http://dx.doi.org/10.3390/electronics10080914.

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This paper discusses the essence and application specifics of the multimode rectifiers in high step-up DC-DC converters. It presents an overview of existing multimode rectifiers. Their use enables operation in the wide input voltage range needed in highly demanding applications. Owing to the rectifier mode changes, the converter duty cycle can be restricted to a range with a favorable efficiency. It is shown that the performance of such converters depends on the front-end inverter type. The study considers current- and impedance-source front-end topologies, as they are the most relevant in high step-up applications. It is explained why the full- and half-bridge implementations provide essentially different performances. Unlike the half-bridge, the full-bridge implementation shows step changes in efficiency during the rectifier mode changes, which could compromise the long-term reliability of the converter. The theoretical predictions are corroborated by experimental examples to compare performance with different boost front-end inverters.

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Kroics, Kaspars, Janis Zakis, and Oleksander Husev. "CAPACITANCE REDUCTION USING RIPPLE SUPPRESSION CONTROL OF SINGLE PHASE ENERGY STORED QUASI-Z-SOURCE INVERTER." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 3 (June 15, 2017): 154. http://dx.doi.org/10.17770/etr2017vol3.2621.

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The energy stored Quasi-Z-source Inverter (qZSI) allows integrate energy storage in addition to the other energy source mainly for output power smoothening. Single phase inverter suffers from double-frequency power ripple in the input side and also in the energy storage that is transferred there from the ac-side. In qZSI must be used large electrolytic dc capacitors in the impedance network to suppress this 100 Hz ripple. Also to suppress this ripple can be applied two types of power decoupling: passive power decoupling and active power decoupling. In this paper is analyzed passive power decoupling that is realized by means of the modified control strategy that produces the time-varying shoot-though duty cycle to mitigate power ripple without deteriorating of the output power quality. The validity of proposed control strategy was confirmed by simulation results that were obtained in PSIM software.

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Sonar, Santosh. "A New Configuration of Three-Level ZSI Using Transistor Clamped Topology." Energies 13, no. 6 (2020): 1469. http://dx.doi.org/10.3390/en13061469.

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In this paper, a three-level ZSI (impedance source inverter) based on transistor clamped theory is proposed. It uses the least number of switch counts and associated gate circuitry among all existing topologies of three-level ZSI without any performance degradation. The existing three-level ZSI topologies require three power switches to be turned ON for upper-lower shoot-through (ULST), and four power switches to be turned ON for full dc-link shoot-through (FST). However, with the proposed configuration, upper–lower shoot-through (ULST) and full dc-link shoot-through (FST) is inserted by turning ON only two power semiconductors. A comparison between diode clamped, transistor clamped, and t-type is presented. The proposed topology can realize any of the existing sine-triangle- or space vector-based PWM (pulse width modulation) schemes, and all existing configurations of three-level ZSI can merge into the proposed inverter configuration.

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Suganthi, J., and M. Rajaram. "Modified impedance source inverter for power conditioning system." Sādhanā 42, no. 3 (2017): 353–64. http://dx.doi.org/10.1007/s12046-017-0608-x.

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Raghavendra Rajan, Vijayaraghavan, C. S. Ajin Sekhar, B. Arun Kumaran, and M. Sasikumar. "Control of Industrial Drives through Multicell Impedance Source Inverter." Applied Mechanics and Materials 787 (August 2015): 848–53. http://dx.doi.org/10.4028/www.scientific.net/amm.787.848.

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In this paper, various power quality issues that occur while driving an industrial motor drive such as voltage sag, swell, interruptions are discussed. A solution for such issues is proposed drives during various conditions of power quality issues is discussed in detail and a comparison with traditional Z-source inverter is made. The results are validated for mathematically modelled using Multicell Z-source inverter. By controlling shoot-through duty cycle using various techniques such as Simple boost control, Maximum boost control, constant boost control these issues are addressed. Multicell Z-source inverter has come as a replacement for traditional Z-source inverter due to its less EMI noise; increased voltage level with increase in cell as well as reduced voltage stress makes it more advantages than traditional one. In this paper, control of industrial system of 3 kW induction drive in MATLAB/Simulink environment and the results are summarised.

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Chen, Jian Gan, Chun Wei Cai, and Pu Feng An. "An Improved Switched-Inductor Z-Source Inverter." Applied Mechanics and Materials 494-495 (February 2014): 1538–41. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1538.

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This paper presents an improved switched inductor (SL) Z-source inverter, which is derived from the classical SL Z-source inverter. To decrease the input current ripple, the proposed inverter employs an LC boost impedance network between the source and Z-source network. Compared with the SL Z-source inverter, the proposed inverter has the constant input current from the source and increases voltage boost inversion ability significantly. Topology analysis in the steady state is given, and simulation results verify the theoretical analysis results.

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Umarani, D., та R. Seyezhai. "Study of Z-Source Inverter Impedance Networks Using 2ω Analysis for Photovoltaic Applications". Applied Mechanics and Materials 852 (вересень 2016): 867–74. http://dx.doi.org/10.4028/www.scientific.net/amm.852.867.

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In a single-phase photovoltaic grid connected system, the inherent second harmonic power flow results in large size impedance network of the Z-Source PV inverter. Minimization of the impedance network is a challenging area of research. So, a detailed mathematical approach based on 2ω ripple analysis is proposed. This paper depicts the 2ω modeling of Z-source inverter to obtain reduced component ratings of the impedance network. The analysis has been extended for Trans Quasi Z network and Embedded Z network and the component ratings are compared with Z network. Simulation has been carried out in MATLAB/Simulink for single phase Z-source PV inverter with impedance network designed using 2ω ripple analysis and the results are verified.

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Yanchenko, S. A., J. V. Matiunina, and A. V. Kondratiev. "MODELING OF FREQUENCY-DEPENDENT IMPEDANCE OF VOLTAGE SOURCE INVERTER." Alternative Energy and Ecology (ISJAEE), no. 22 (April 8, 2016): 30–36. http://dx.doi.org/10.15518/isjaee.2015.22.003.

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Kamalakkannan, S., and D. Kirubakaran. "Solar energy based impedance-source inverter for grid system." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 1 (2019): 102. http://dx.doi.org/10.11591/ijece.v9i1.pp102-108.

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In this work, the fickleness of solar energy can be overcome by using Maximum Power Point Tracking algorithm (MPPT). Perturb and Observation (P&amp;O) MPPT algorithm accomplish fast the maximum power point for rapid change of environmental conditions such as irradiance intensity and temperature. The MPPT algorithm applied to solar PV system keep the boost converter output constant. Output from boost converter is taken to three phase impedance-source inverter with RL load and grid system. Impedance-source inverter performs the transformation of variable DC output of the solar PV system in to near sinusoidal AC output. This near sinusoidal AC output consecutively is served to the RL load first and then to grid system. The simulation is carried out in matlab/simulink platform both for RL load and grid system and the simulation results are experimentally validated for RL load arrangement only.

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Karaarslan, Ahmet, Othman Al-Darraji, and Doğan Çalıkoğlu. "Two new impedance source network topologies for inverter applications." International Journal of Electronics 106, no. 4 (2018): 599–619. http://dx.doi.org/10.1080/00207217.2018.1545261.

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Mosa, Mostafa, Robert S. Balog, and Haitham Abu-Rub. "High-Performance Predictive Control of Quasi-Impedance Source Inverter." IEEE Transactions on Power Electronics 32, no. 4 (2017): 3251–62. http://dx.doi.org/10.1109/tpel.2016.2531989.

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Jin, Xu, Li Lin, and Sun Yuwen. "Research on Shoot-Through Zero Vector of Impedance Source Linearization Control Strategy." Open Electrical & Electronic Engineering Journal 9, no. 1 (2015): 504–11. http://dx.doi.org/10.2174/1874129001509010504.

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Z-source inverter takes advantage of a distinctive impedance source network and modulation method of shoot-through vector, and achieves the function of buck/boost DC - AC inverter in the single stage system at the same time, which is suitable for grid-connected PV systems with large input voltage variations. The purpose of this study is to draw a unified method of shoot-through vector and grid inverter of the z-source inverter, apply the method of state-space averaging for the modeling analysis of the z-source inverter and give a complete mathematical model. Based on which and according to the nonlinear control theory and making use of the linearization of affine nonlinear model of the z-source inverter, we can get the specific derivation of equation. The results of the simulation and experiment show that according to the linearization of the shoot-through vector with affine nonlinear model for the z-source, we can make the system have the characteristics of fast and accurate tracking, small overshoot, small DC voltage, AC current ripple and small THD, and it has a certain practical value.

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Bayhan, Sertac, та Hasan Komurcugil. "Lyapunov-Function-Based Controller for Single-Phase NPC Quasi-Z-Source Inverter with 2ω Frequency Ripple Suppression". Energies 14, № 1 (2020): 140. http://dx.doi.org/10.3390/en14010140.

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This paper proposes a high-performance control technique based on Lyapunov’s stability theory for a single-phase grid-connected neutral-point-clamped quasi-impedance source inverter with LCL filter. The Lyapunov function based control is employed to regulate the inverter output current, whereas the proportional resonant controller is used to produce the reference of the inverter output current that is needed in the Lyapunov function based control. Use of proportional resonant controller ensures the zero steady-state error in the grid current. An important feature of the proposed Lyapunov function based control is the achievement of resonance damping without using a dedicated damping method. Furthermore, the modified simple boost control technique is proposed to eliminate the double-line frequency ripples in the quasi-impedance source inductor currents and minimize the double-line frequency ripples in the quasi-impedance source capacitor voltages. The proposed control technique considerably reduces the inverter size, weight, and cost as well as increases overall system efficiency since the required inductances and capacitances sizes are lower. Experimental results obtained from a 2.5 kW neutral-point-clamped quasi-impedance source inverter prototype are presented to validate the performance of the Lyapunov function based control technique.

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Aqeel Anwar, Muhammad, Ghulam Abbas, Irfan Khan, Ahmed Bilal Awan, Umar Farooq, and Saad Saleem Khan. "An Impedance Network-Based Three Level Quasi Neutral Point Clamped Inverter with High Voltage Gain." Energies 13, no. 5 (2020): 1261. http://dx.doi.org/10.3390/en13051261.

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Due to the impediments of voltage source inverter and current source inverter, Z-Source Inverter (ZSI) has become notorious for better power quality in low and medium power applications. Several modifications are proposed for impedance source in the form of Quasi Z-Source Inverter (QZSI) and Neutral Point Clamped Z-Source Inverter (NPCZSI). However, due to the discontinuity of the source current, NPCZSI is not suitable for some applications, i.e., fuel cell, UPS, and hybrid electric vehicles. Although in later advancements, source current becomes continuous in multilevel QZSI, low voltage gain, higher shoot-through duty ratio, lesser availability of modulation index, and higher voltage stress across switches are still an obstacle in NPCZSI. In this research work, a three-level high voltage gain Neutral Point Clamped Inverter (NPCI) that gives three-level AC output in a single stage, is proposed to boost up the DC voltage at the desired level. At the same time, it detains all the merits of previous topologies of three-level NPCZSI/QZSI. Simulations have been done in the MATLAB/Simulink environment to show the effectiveness of the proposed inverter topology.

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Kumar, S. Bala, Samuel Kefale, and Azath M. "Comparison of Z-Source EZ-Source and TZ-Source Inverter Systems for Wind Energy Conversion." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 4 (2018): 1693. http://dx.doi.org/10.11591/ijpeds.v9.i4.pp1693-1701.

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In this paper, three different impedance source inverters: Z-source inverter, EZ- source inverter, TZ-Source for wind energy conversion system (WECS) were investigated. Total output power and THD of each of these systems are calculated. The proposed system can boost the output voltage effectively when the low output voltage of the generator is available at low wind speed. This system has higher performance, less components, increased efficiency and reduced cost. These features make the proposed TZSI based system suitable for the wind conversion systems. MATLAB simulink model for wind generator system is developed and simulation studies are successfully performed. The simulation is done using MATLAB and the simulation results are presented. This comparison shows that the TZ-source inverter is very promising for wind energy conversion system.

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Grgić, Ivan, Dinko Vukadinović, Mateo Bašić, and Matija Bubalo. "Calculation of Semiconductor Power Losses of a Three-Phase Quasi-Z-Source Inverter." Electronics 9, no. 10 (2020): 1642. http://dx.doi.org/10.3390/electronics9101642.

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This paper presents two novel algorithms for the calculation of semiconductor losses of a three-phase quasi-Z-source inverter (qZSI). The conduction and switching losses are calculated based on the output current-voltage characteristics and switching characteristics, respectively, which are provided by the semiconductor device manufacturer. The considered inverter has been operated in a stand-alone operation mode, whereby the sinusoidal pulse width modulation (SPWM) with injected 3rd harmonic has been implemented. The proposed algorithms calculate the losses of the insulated gate bipolar transistors (IGBTs) and the free-wheeling diodes in the inverter bridge, as well as the losses of the impedance network diode. The first considered algorithm requires the mean value of the inverter input voltage, the mean value of the impedance network inductor current, the peak value of the phase current, the modulation index, the duty cycle, and the phase angle between the fundamental output phase current and voltage. Its implementation is feasible only for the Z-source-related topologies with the SPWM. The second considered algorithm requires the instantaneous values of the inverter input voltage, the impedance network diode current, the impedance network inductor current, the phase current, and the duty cycle. However, it does not impose any limitations regarding the inverter topology or switching modulation strategy. The semiconductor losses calculated by the proposed algorithms were compared with the experimentally determined losses. Based on the comparison, the correction factor for the IGBT switching energies was determined so the errors of both the algorithms were reduced to less than 12%.

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Rabkowski, Jacek. "SiC Power Devices in Impedance Source Converters." Materials Science Forum 897 (May 2017): 701–4. http://dx.doi.org/10.4028/www.scientific.net/msf.897.701.

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This paper discusses issues related to application of SiC power devices to new family of power converters. Impedance source converters show unique feature, buck boost characteristics due to specific impedance network. Passive elements of this network may be seriously reduced with the switching frequency increase, possible with fast-switching SiC transistors. On the other hand, switching conditions of the power devices are more severe than in traditional voltage-source or current-source converters. These issues are discussed on the base of the 6kVA/100kHz quasi-Z-source inverter example.

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Sangari, Arasakumar, and R. Umamaheswari. "Analysis of Impedance Source Inverter Topologies for Grid integration of PV inverters." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 4 (2015): 797. http://dx.doi.org/10.11591/ijpeds.v6.i4.pp797-807.

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In this paper, the performance of different Impedance Source Inverter (ZSI) topologies in implementing single stage power conversion for grid ingetertion of PV power converters <del cite="mailto:QP%20Council" datetime="2015-08-11T09:53"> </del>is discussed.Unlike the traditional inverters, ZSI employs a distinctive impedance network, thereby making shoot-through state is possible. The independent control variables are shoot-through duty ratio and modulation index. Simple Boost Control pulse width modulation technique was used in this work to vary the modulation index. Here the basic operation, simple boost control method, characteristics, requirements and harmonic analysis of the classical Z-Source Inverter (ZSI), TZ-Source Inverter (TZSI), Trans-Z-Source Inverter (Trans-ZSI) and Improved ZSI (IMZSI) topologies were compared for interfacing the wide range <del cite="mailto:QP%20Council" datetime="2015-08-11T09:54"> </del>variable input energy to utility supply system. The performances were compared based on its MATLAB/SIMULINK simulation model and featured results are shown to confirm its validity.

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Palanisamy, R., and K. Vijayakumar. "Maximum Boost Control for 7-level Z-source Cascaded H-Bridge Inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 2 (2017): 739. http://dx.doi.org/10.11591/ijpeds.v8.i2.pp739-746.

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This paper proposes maximum boost control for 7-level z-source cascaded h-bridge inverter and their affiliation between voltage boost gain and modulation index. Z-source network avoids the usage of external dc-dc boost converter and improves output voltage with minimised harmonic content. Z-source network utilises distinctive LC impedance combination with 7-level cascaded inverter and it conquers the conventional voltage source inverter. The maximum boost controller furnishes voltage boost and maintain constant voltage stress across power switches, which provides better output voltage with variation of duty cycles. Single phase 7-level z-source cascaded inverter simulated using matlab/simulink.

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Fang, Xupeng, Yingying Tian, Xiaokang Ding, and Bolong Ma. "Series-type switched-inductor Z-source inverter." CES Transactions on Electrical Machines and Systems 4, no. 1 (2020): 53–60. http://dx.doi.org/10.30941/cestems.2020.00008.

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Rahul, Jammy Ramesh, Chinmay Kumar Das, Kirubakaran Annamalai, and Veeramraju Tirumala Somasekhar. "Impedance Source-based Multilevel Inverter: A State-of-the-Art Review." Journal of Circuits, Systems and Computers 29, no. 13 (2020): 2030011. http://dx.doi.org/10.1142/s0218126620300111.

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Impedance source-based multilevel inverters are becoming popular for emerging power generation technologies such as fuel cells, photovoltaic, and wind turbines. It is one of the most promising power electronic interfaces for single stage DC/AC conversion with inherent buck-boost capability. Therefore, in this paper, an extensive review of emerging impedance source-based multilevel inverter (Z-MLI) topologies is presented. These topologies are developed by the combination of impedance source network and multilevel inverter (MLI) with the merits of high voltage gain, enhanced reliability due to shoot-through immunity, improved input voltage regulation, reduced filter size, and better quality of supply. Most of the recent Z-MLI topologies are based on quasi-Z-source network which operates with continuous input current. In order to identify a suitable topology, an exhaustive comparison is made with various configurations of Z-MLIs in terms of component count, boost gain, switching stress, and control complexity.

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Li, Ming, Xing Zhang, and Wei Zhao. "A Novel Stability Improvement Strategy for a Multi-Inverter System in a Weak Grid Utilizing Dual-Mode Control." Energies 11, no. 8 (2018): 2144. http://dx.doi.org/10.3390/en11082144.

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Due to the increasing penetration of distributed generations (DGS) and non-negligible grid impedance, the instability problem of the multi-inverter system operating in current source mode (CSM) is becoming serious. In this paper, a closed-loop transfer function model of such a multi-inverter system is established, by which it is concluded that output current resonance will occur with the increase in the grid impedance. In order to address this problem, this paper presents a novel dual-mode control scheme of multiple inverters: one inverter operating in CSM will be alternated into voltage source mode (VSM) if the grid impedance is high. It is theoretically proved that the coupling between the inverters and the resonance in the output current can be suppressed effectively with the proposed scheme. Finally, the validity of the proposed theory is demonstrated by extensive simulations and experiments.

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P, Madasamy. "Quasi Impedance Source Inverter Based Active Filter for Flexible Grid Connection." International Journal for Research in Applied Science and Engineering Technology V, no. IX (2017): 154–60. http://dx.doi.org/10.22214/ijraset.2017.9024.

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Liu, Ping, Jie Xu, and Chunming Tu. "Thermal optimized discontinuous modulation strategy for three phase impedance source inverter." Microelectronics Reliability 112 (September 2020): 113807. http://dx.doi.org/10.1016/j.microrel.2020.113807.

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Kamalakkannan, S., and D. Kirubakaran. "Solar Energy System Based Impedance-Source Inverter for Grid Connected System." International Journal of Applied Power Engineering (IJAPE) 7, no. 2 (2018): 129. http://dx.doi.org/10.11591/ijape.v7.i2.pp129-138.

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In this work, the fickleness of solar energy can be overcome by using Maximum Power Point Tracking algorithm (MPPT). Perturb and Observation (P&amp;O) MPPT algorithm accomplish fast the maximum power point for rapid change of environmental conditions such as irradiance intensity and temperature. The MPPT algorithm applied to solar system keep the boost converter output constant. Output from boost converter is taken to three phase impedance-source inverter with RL load and grid system. Impedance-source inverter performs the transformation of variable DC output of the solar system in to near sinusoidal AC output. This near sinusoidal AC output consecutively is served to the RL load first and then to grid system. The simulation is carried out in matlab/simulink platform both for RL load and grid system and the simulation results are experimentally validated for RL load arrangement only.

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Uthirasamy, R., and C. Suganya. "Implementation Of Maximum Boost Control Switching Strategy For Impedance Source Inverter." i-manager's Journal on Electronics Engineering 2, no. 2 (2012): 36–42. http://dx.doi.org/10.26634/jele.2.2.1625.

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Ghaderi, Davood, Dina Molaverdi, Alireza Kokabi, and Behnaz Papari. "A multi-phase impedance source inverter with an improved controller structure." Electrical Engineering 102, no. 2 (2019): 683–700. http://dx.doi.org/10.1007/s00202-019-00903-9.

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Vaikundaselvan, B., T. Sivakumar, and S. Sonia. "Design and Implementation of FPGA-Based Grid-Connected Impedance-Source Inverter." Journal of The Institution of Engineers (India): Series B 101, no. 2 (2020): 129–38. http://dx.doi.org/10.1007/s40031-020-00430-3.

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Zhu, Xiaoquan, Bo Zhang, and Dongyuan Qiu. "A New Half-Bridge Impedance Source Inverter With High Voltage Gain." IEEE Transactions on Power Electronics 34, no. 4 (2019): 3001–8. http://dx.doi.org/10.1109/tpel.2018.2867165.

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Subhani, Nafis, Ramani Kannan, Apel Mahmud, and Frede Blaabjerg. "Z‐source inverter topologies with switched Z‐impedance networks: A review." IET Power Electronics 14, no. 4 (2021): 727–50. http://dx.doi.org/10.1049/pel2.12064.

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Jhanani Shree, U., R. Bharathy, M. Anithamary, and V. Bakyalakshmi. "Automated Energy Efficient Solar Power Management System Using Impedance Source Inverter." Journal of Physics: Conference Series 1818, no. 1 (2021): 012231. http://dx.doi.org/10.1088/1742-6596/1818/1/012231.

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Venkatachalam, K. M., V. Saravanan, M. A. K. Borelessa, and K. T. M. U. Hemapala. "Single phase seven level Z-source cascaded H-bridge inverter for photovoltaic systems." International Journal of Advances in Applied Sciences 10, no. 1 (2021): 60. http://dx.doi.org/10.11591/ijaas.v10.i1.pp60-69.

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The Multilevel inverter (MLI) is identified as a viable power electronic unit for distributed energy conversion applications. In this paper discusses the performance of single phase seven level Z (impedance) source cascaded H-bridge inverter topology suited for solar photovoltaic systems. A modified sinusoidal pulse width modulation technique is used to control the switches of the H-bridge inverter. The simulation results are obtained interms of inverter output voltage and harmonic analysis confirm improvement in voltage boost and reduction in harmonic distortion of the suggested inverter topology. The experimental results matches with the simulation values, as verified through a scaled down prototype.

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Kumar Akkarapaka, Ananda, and Dheerendra Sing. "Digital Implementation of DSVPWM Control for EV fed through Impedance Source Inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 3 (2015): 477. http://dx.doi.org/10.11591/ijpeds.v6.i3.pp477-485.

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In this paper, a new space vector modulation technique is proposed for speedcontrol of Induction Motor using Z-source inverter powered by a low voltage DCsource. The zero states of conventional space vector modulation is used for boosting the DC link voltage to the required level. The proposed SVM techniqueestimates the required shoot through period of the Z-source inverter to maintainthe DClink voltage constant at the desired level through capacitor voltage control.A 32 bit DSP (TMS320F28335) is used to implement the proposed space vectormodulation method. The power structure and the modulation technique is wellsuited for electric vehicle application.

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Akrami, Amin, Mohsen Gitizadeh, Majid Nayeripour, and Mohammad Ghaderi. "Double Carrier Pulse width Modulation Control for a Quasi Impedance Source Inverter." Scientific Journal of Riga Technical University. Power and Electrical Engineering 29, no. 1 (2011): 143–46. http://dx.doi.org/10.2478/v10144-011-0024-8.

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Double Carrier Pulse width Modulation Control for a Quasi Impedance Source Inverter The quasi-Z-source inverter (QZSI) is similar to the ZSI. The QZSI has been developed which feature several improvements and no disadvantages when compared to the ZSI. Also Double carrier pulse width modulation control is a new control method for controlling the ZSI and it has a lot of benefit if to compare with other traditional control methods. This paper improved properties of the QZSI by using the double carrier pulse width modulation control. Simulation results will be presented to demonstrate the new features.

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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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P, Thirumalini, R. Arulmozhiyal, and M. Murali. "A Cascade Multilevel Z-Source Inverter for Photovoltaic System." TELKOMNIKA Indonesian Journal of Electrical Engineering 16, no. 3 (2015): 473. http://dx.doi.org/10.11591/tijee.v16i3.1637.

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This paper describes a multilevel Z-source inverter for solar photovoltaic applications. The conventional power conversion topology performs either buck or boost the input voltage for non linear load depending upon duty ratio and modulation index in a multiple stage conversion with the help of impedance source passive network (L and C), which is usually known as Z-Source, which couples the n level source with input to the power source and increase the power efficiency. The multilevel z network capabilities of inverter are operated in the shoot through state of duty cycle and it acts as a filter to reduces the level of harmonics, stabilize power factor and to increase the output AC voltage range of inverter. To overcome further harmonics, multilevel level operation z source inverter compensates the fundamental level of harmonic in renewable. Proposed work as a whole involves the simulation part to design multilevel inverter. The output of the simulation is obtained by Simulink model using MATLAB.

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Mande, Daouda, João Pedro Trovão, and Minh Cao Ta. "Comprehensive Review on Main Topologies of Impedance Source Inverter Used in Electric Vehicle Applications." World Electric Vehicle Journal 11, no. 2 (2020): 37. http://dx.doi.org/10.3390/wevj11020037.

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Power electronics play a fundamental role for electric transportation, renewable energy conversion and many other industrial applications. They have the ability to help achieve high efficiency and performance in power systems. However, traditional inverters such as voltage source and current source inverters present some limitations. Consequently, many research efforts have been focused on developing new power electronics converters suitable for many applications. Compared with the conventional two-stage inverter, Z-source inverter (ZSI) is a single-stage converter with lower design cost and high efficiency. It is a power electronics circuit of which the function is to convert DC input voltage to a symmetrical AC output voltage of desired magnitude and frequency. Recently, ZSIs have been widely used as a replacement for conventional two-stage inverters in the distributed generation systems. Several modifications have been carried out on ZSI to improve its performance and efficiency. This paper reviews the-state-of-art impedance source inverter main topologies and points out their applications for multisource electric vehicles. A concise review of main existing topologies is presented. The basic structural differences, advantages and limitations of each topology are illustrated. From this state-of-the-art review of impedance source inverters, the embedded quasi-Z-source inverter presents one of the promising architectures which can be used in multisource electric vehicles, with better performance and reliability. The utilization of this new topology will open the door to several development axes, with great impact on electric vehicles (EVs).

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Yuan, Jing, Yongheng Yang, Ping Liu, Yanfeng Shen, and Frede Blaabjerg. "Modified Impedance-Source Inverter with Continuous Input Currents and Fault-Tolerant Operations." Energies 13, no. 13 (2020): 3408. http://dx.doi.org/10.3390/en13133408.

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Impedance-source (Z-source) inverters are increasingly adopted in practice, where a high voltage gain is required. However, issues like drawing a non-continuous current from the DC source and ceasing the energy supply under DC source faults are also observed. In this paper, an embedded enhanced-boost Z-source inverter (EEB-ZSI) is thus proposed to tackle the issues. The proposed EEB-ZSI employs two DC sources, which enable the continuous input current and fault-tolerant operations (e.g., open-circuit and short-circuit faults in the DC sources). The operational principles are presented in detail with an in-depth circuit analysis. Moreover, the proposed EEB-ZSI is benchmarked with prior-art Z-source inverters. Experimental tests further demonstrate the effectiveness of EEB-ZSI regarding the continuous input current and flexible fault tolerance.

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Mohammad Irshad, Shaik, and G. P. Ramesh. "High Gain Power Generation Based On Hybrid Renewable Energy for AC Load Application." Indonesian Journal of Electrical Engineering and Computer Science 12, no. 3 (2018): 1195. http://dx.doi.org/10.11591/ijeecs.v12.i3.pp1195-1202.

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This study presents the distributed energy source based current fed inverter has generated high voltage with less passive elements. The hybrid renewable energy generation such as solar and wind has used. The single stage power generation based switched inverter has combined characteristics of both impedance source inverter and switched boost inverter. In conventional voltage source inverter has less boost ability and high electromagnetic noise immunity to the modified current fed inverter circuit. The single diode photovoltaic model and wind-based energy generation have fed into current fed switched inverter for improving high gain and high power factor. The maximum power point tracking such as incremental conductance algorithm has fast-tracking of solar power and generates continuous power to the inverter circuit. 12V solar power and wind power is designed for dc power production, and the output of dc link capacitor is 118V using current fed switched inverter. The current fed switched inverter is designed and implemented in MATLAB/Simulink environment.

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Kouzou, Abdellah, and Haitham Abu-Rub. "Multiphase Z-source inverter using maximum constant boost control." Archives of Control Sciences 23, no. 1 (2013): 107–26. http://dx.doi.org/10.2478/v10170-011-0045-8.

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Abstract This paper deals with the impedance source (Z-source) multiphase inverter, where the maximum constant boost control method is studied and analyzed in the general case of number of phases. On the other side the impact of the modulation index and the number of phases on the duty cycle shoot-through and on the gain of the output voltage ranges is presented. To validate advantages of the Z-source multiphase inverter, the proposed topology and the maximum constant boost control are implemented in simulation and in real time experimentation with Z-source five phase inverter. The output voltage is applied to two parallel loads, a five phase resistive load and a five phase induction machine.

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Journal articles on the topic 'Impedance source type inverter'

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