Journal articles: 'Flying Capacitor Multilevel Inverters'

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Pawar, Nitin, Vijay Kumar Tayal, and Pallavi Choudekar. "Design of Flying Capacitor Multilevel Inverter for Solar Energy Applications." E3S Web of Conferences 184 (2020): 01035. http://dx.doi.org/10.1051/e3sconf/202018401035.

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The continuous rise in electricity demand leads to adoption of renewable energy sources such as sun, wind for power generation. In order to utilize the electric power obtained from renewable solar energy, inverters are required to inject the electricity into the grid. This paper presents single phase flying capacitor multi-level inverter with help of SPWM technique. The comparison of single phase three-level, five-level and seven-level flying capacitor multilevel inverters is carried out with respect to waveform pattern, output current, output voltage, active power and reactive power waveforms. The simulations are conducted in MATLAB/SIMULINK environment.

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Kandavel, B., G. Uvaraj, and M. Manikandan. "Comparative Study of Total Harmonic Distortion in Multilevel Inverters Based WECS." International Journal of Engineering & Technology 7, no. 3.1 (August 4, 2018): 42. http://dx.doi.org/10.14419/ijet.v7i3.1.16794.

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This paper presents comparative study of Total Harmonic Distortion (THD) and its individual harmonic contents without grid and with grid for Diode clamped multi level inverter (DCMLI) and Flying capacitor clamped multilevel inverter (FCMLI) based Doubly Fed Induction Generator (DFIG) employing PI and Fuzzy logic controller (FLC). Simple method to control for a variable speed wind energy conversion system with a DFIG is connected to the grid through a diode rectifier and a diode clamped multilevel inverter (DCMLI). The DC-link voltage is controlled through a DC-DC boost converter to keep the DC voltage at constant value. Inverter is controlled by sinusoidal pulse width modulation technique, which supplies power to the grid. The THD and its harmonic content are studied for different wind speeds. DFIG fed flying capacitor multi level inverter (FCMLI) based WECS connected to load as well as grid. FCMLI is controlled through sinusoidal pulse width modulation. Voltage and current harmonics are studied. The results of both multilevel inverters are compared. It shows that the level of harmonic content of two types of multilevel inverters working at different wind speeds indicates that Total Harmonic Distortion (THD) for DCMLI has given best results.

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Priyanka, G., J. Surya Kumari, D. Lenine, Suresh Kumar Tummala, Hassan Mohmmed Al-Jawahry, and Harshit Gupta. "Reduced Common Mode Multilevel Inverter Strategy in Photovoltaic Systems." E3S Web of Conferences 391 (2023): 01136. http://dx.doi.org/10.1051/e3sconf/202339101136.

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Now-a-days, non-conventional energy sources are playing a vital role in the generation of electrical energy. This is due to the disadvantages in the conventional sources like pollution, non-availability of the resources, greenhouse effect. Hence more concentration is made by the researcher’s on these non-conventional sources so called as renewable energy sources. These renewable sources are used with the converters along with filters to give the best output. In this work, we are focusing on the renewable energy called solar energy and hence the converter is inverter in this case. Basically we have conventional inverters as well as multilevel inverters. Multilevel inverters are basically classified into three types and they are cascaded H-bridge multilevel inverter, diode clamped multilevel inverter, flying capacitor multilevel inverter. Among these cascaded multilevel inverter as many advantages like reduced number of components. This advantage is being used in this work and is simulated by using MATLAB.

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Jing Huang and K. A. Corzine. "Extended operation of flying capacitor multilevel inverters." IEEE Transactions on Power Electronics 21, no. 1 (January 2006): 140–47. http://dx.doi.org/10.1109/tpel.2005.861108.

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Sathish Kumar, S., R. Ramkumar, S. Sivarajeswari, D. Ramya, T. Subburaj, and Martin Sankoh. "Performance Enhancement of a Three Phase Boost-Cascaded Fifteen Level Inverter Using the PI Controller." Mathematical Problems in Engineering 2022 (May 19, 2022): 1–17. http://dx.doi.org/10.1155/2022/3888571.

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Photovoltaic power generation is a potential alternative energy source that offers several benefits over other alternative energy sources such as wind, sun, ocean, biomass, geothermal, and so on. Multilevel inverters are essential for power conversion in solar power generation. These multilevel inverters employ three distinct topologies: diode-clamped (neutral-point clamped) inverter, capacitor-clamped (flying capacitor) inverter, and cascaded H-bridge multilevel inverter. The cascaded H-bridge multilevel inverter is more appropriate for photovoltaic applications than the other two topologies. The proposed system asymmetrical cascaded multilevel inverter (ACMLI) is energized using a photovoltaic system (PV). A three-phase cascaded H-bridge fifteen-level inverter for grid-connected solar systems is given in this study utilizing a proportional integral controller. The harmonic distortion was removed using a multicarrier pulse width modulation method. The MATLAB/Simulink is used to simulate the performance of a three-phase cascaded H-bridge fifteen-level inverter in terms of harmonic content and number of switches. To test the performance of the designed system, a hardware prototype was created. From the obtained results, the proposed method reduces the switch count, harmonic distortion, and rejects the external disturbances of input and output variables.

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Renukadevi, S. "Switching Sequence Control 31-Level Asymmetric Cascaded of Reduced Switch Count Multilevel Inverter with Multi Carrier Pulse Width Modulation." Journal of Energy Engineering and Thermodynamics, no. 22 (March 31, 2022): 9–18. http://dx.doi.org/10.55529/jeet.22.9.18.

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Various pulse width modulation techniques, including as cascaded multilevel inverters (MLI), diode clamped multilevel inverters, and flying capacitor multilevel inverters, can be used to simply operate common inverters. Due to increased switching losses, current MLIs cannot reach high efficiency. Due to lower losses and THD than standard MLI topologies, the asymmetric cascaded multi-level H-bridge inverter architecture examined in this white paper employs fewer switches and more output voltage levels (Total Harmonic Distortion). The THD is less than the IEEE standard because of the suggested architecture. In this instance, phase difference (PD) multi-carrier PWM techniques are used to control the gate pulses using sinusoidal reference. Each switch receives a different pulse pattern thanks to a method of decimal-to-binary conversion. It is possible to utilise the suggested circuit for applications requiring moderate to high power, and it is quite simple to evaluate. Utilize the MATLAB/SIMULINK environment to simulate time-domain behaviour for the 31-level and 33-level multilevel inverter topologies.

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Renukadevi, S. "Switching Sequence Control 31-Level Asymmetric Cascaded of Reduced Switch Count Multilevel Inverter with Multi Carrier Pulse Width Modulation." Journal of Image Processing and Intelligent Remote Sensing, no. 12 (November 30, 2021): 17–26. http://dx.doi.org/10.55529/jipirs.12.17.26.

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Various pulse width modulation techniques, including as cascaded multilevel inverters (MLI), diode clamped multilevel inverters, and flying capacitor multilevel inverters, can be used to simply operate common inverters. Due to increased switching losses, current MLIs cannot reach high efficiency. Due to lower losses and THD than standard MLI topologies, the asymmetric cascaded multi-level H-bridge inverter architecture examined in this white paper employs fewer switches and more output voltage levels (Total Harmonic Distortion). The THD is less than the IEEE standard because of the suggested architecture. In this instance, phase difference (PD) multi-carrier PWM techniques are used to control the gate pulses using sinusoidal reference. Each switch receives a different pulse pattern thanks to a method of decimal-to-binary conversion. It is possible to utilise the suggested circuit for applications requiring moderate to high power, and it is quite simple to evaluate. Utilize the MATLAB/SIMULINK environment to simulate time-domain behaviour for the 31-level and 33-level multilevel inverter topologies.

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Ahmed, Rokan Ali, Enas Dawood Hassan, and Adham Hadi Saleh. "A new flying capacitor multilevel converter topology with reduction of power electronic components." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 2 (June 1, 2023): 1011. http://dx.doi.org/10.11591/ijpeds.v14.i2.pp1011-1023.

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High power capacity and reliability are characteristics of multilevel inverters. The using a collection of DC sources can produce a terminal voltage that is very close to sinusoidal. The power quality can be improved by adding more levels, but this makes the control system more complicated and expensive. The number of power components in a multilevel inverter has been studied for decades. So, research needs to be done on multilevel inverter configurations to find ways to add levels with fewer power switches than with traditional topologies and those that have already been proposed. In this research, a new power-efficient arrangement of a flying-capacitor inverter is introduced. In order to illustrate the suggested topology, a seven-level multilevel inverter is constructed and demonstrated in a simplified form. Fewer power components, including power switches, capacitors, and gate driver circuits, are required in this topology than in other topologies described in the recent literature, which is one of its main advantages. The improvement mentioned above can be seen in the way this topology works, which is shown by the characteristics of the circuit. MATLAB/Simulink R2021a is used to simulate and verify the circuit to ensure the proposed topology is correct.

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Saha, Akshay Kumar. "Grid-Connected PEM Fuel Cell with Multi-Pulse Multilevel Inverter." International Journal of Engineering Research in Africa 49 (June 2020): 54–67. http://dx.doi.org/10.4028/www.scientific.net/jera.49.54.

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Application of multi-pulse multilevel inverters is considered in this paper for distributed generation. A five-level twelve-pulse neutral point clamped inverter has been combined with a proton exchange membrane fuel cell in order to investigate load following characteristics of the fuel cell. The fuel cell implemented with a three-phase multi-pulse multilevel inverter is adept of delivering single-phase and three-phase loads both in islanded and grid-connected approach. Changes in power demand from no-load to full-load (120 kW) have been applied to study the characteristics of the system from the perspective of how it can follow the load changes in load demand. It has been observed that the fuel cell model is adept of following power request as per requirement; however, there is a response time of few seconds, because the reformer for the fuel cell requires time to generate fuel and the fuel cell requires time for chemical reactions to take place in it. Implementations of six-pulse and twelve-pulse five-level neutral point clamped and flying capacitor inverters show that total harmonic distortions for six-pulse and twelve-pulse five-level neutral point clamped inverters to be 1.066219% and 0.406149% respectively as compared to 2.466889% and 1.5104075% for flying capacitor inverters. It has been observed that with twelve-pulse neutral point clamped inverter, the output voltage waveform is smoother and close to sinewave. The results of the research work is presented with analyses to validate that multi-pulse multilevel neutral point clamped inverter is a better way out for the fuel cell power generation model as this type of inverters produces smoother waveforms to improve power quality with lower harmonics.

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Qasim Hussein Algburi, Ali, and P. V. Ramana Rao. "Comparative analysis of various multilevel inverter symmetrical topologies with minimum number of components." International Journal of Engineering & Technology 7, no. 1.8 (February 9, 2018): 77. http://dx.doi.org/10.14419/ijet.v7i1.8.9975.

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Multilevel inverters (MLI) are frequently used in different fields like, oil and gas sectors, installations of power supply, high power and medium voltage applications and in FACTS (flexible AC transmission system) devices to improve power quality. Lot of topologies has been developed in the literature regarding multilevel inverters such as diode clamped type, flying capacitor type and cascaded H-bridge type multilevel inverters. However, several challenges are being faced while implementing these topologies like more number of switches, more losses and cost. The optimized construction of multilevel inverter is to get more number of levels with less number of switches and low total harmonic distortion. In this paper, three different existing multilevel inverter topologies have been considered and analyzed for five level output voltage. A comparison table is given for number of switches, extra diodes and voltage sources. The total work is carried by using Matlab/simulink software and results are presented.

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Bouamrane, Omar, Tajeddine Khalili, Ilham Tyass, Mohamed Rafik, Abdelhadi Raihani, Lhoussain Bahati, and Bachir Benhala. "Flying capacitors multilevel inverter: architecture, control and active balancing." E3S Web of Conferences 336 (2022): 00039. http://dx.doi.org/10.1051/e3sconf/202233600039.

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To improve efficiency and productivity of electric energy generators based on photovoltaic, wind or hybrid systems; several DC/AC conversion techniques have been developed and tested like multilevel inverters. Multilevel inverters are a performant solution for the ramp-up of converters. As soon as the DC supply voltage exceeds a few kV, it is necessary to combine switches, switching cells or converters. This paper presents a progressive study of an interesting type of these inverters namely flying capacitor multilevel inverters (FCMLI): architecture, evolutions, benefits and inconvenient. In fact, we processed 3-and 5-level FCMLI while presenting possible circuit schemes and simulation results on Matlab Simulink. Finally, a general formulation has been adopted and applied to a 17 level FCMLI.

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Chang-xin, Miao, Shi Li-ping, Wang Tai-xu, and Cui Cheng-bao. "Flying capacitor multilevel inverters with novel PWM method." Procedia Earth and Planetary Science 1, no. 1 (September 2009): 1554–60. http://dx.doi.org/10.1016/j.proeps.2009.09.240.

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Rana, Ronak A., Sujal A. Patel, Anand Muthusamy, Chee woo Lee, and Hee-Je Kim. "Review of Multilevel Voltage Source Inverter Topologies and Analysis of Harmonics Distortions in FC-MLI." Electronics 8, no. 11 (November 11, 2019): 1329. http://dx.doi.org/10.3390/electronics8111329.

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We review the most common topology of multi-level inverters. As is known, the conventional inverters are utilized to create an alternating current (AC) source from a direct current (DC) source. The two-level inverter provides various output voltages [(Vdc/2) and (−Vdc/2)] of the load. It is a successive method, but it makes the harmonic distortion of the output side, Electromagnetic interference (EMI), and high dv/dt. We solve this problem by constructing the sinusoidal voltage waveform. This is achieved by a “multilevel inverter” (MLI). The multilevel inverter creates the output voltage with multiple DC voltages as inputs. Many voltage levels are combined to produce a smoother waveform. During the last decade, the multilevel inverter has become very popular in medium and high-power applications with some advantages, such as the reduced power dissipation of switching elements, low harmonics, and low EMIs. We introduce the information about several multilevel inverters such as the diode-clamped multilevel inverter (DC-MLI), cascaded H-bridge multilevel inverter (CHB-MLI), and flying-capacitor multilevel inverter (FC-MLI) with Power systems CAD (PSCAD) simulation. It is shown that THD is 28.88% in three level FC-MLI while THD is 18.56% in five level topology. Therefore, we can decrease the total harmonic distortion adopting the higher-level topology.

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Anwer Abbood, Afaneen. "Harmonic spectra of BLDC motor supplied by a solar PV multilevel inverter." Indonesian Journal of Electrical Engineering and Computer Science 20, no. 3 (December 1, 2020): 1693. http://dx.doi.org/10.11591/ijeecs.v20.i3.pp1693-1702.

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The multilevel inverters have been used especially in renewable energy aspects in order to assess total harmonic distortion (THD). THD is considered to produce a good quality of current signal of BLDC motor drive. In this paper, a solar PV inveter fed brushless DC (BLDC) motor drive is discussed considering two topologies of three phase multilevel inverters. These topologies are flying capacitor and clamped diode inverters. The inverter efficiency and output power have an effectiveness on THD values. A boost dc to dc converter using incremental conductance maximum power point tracking (INC-MPPT) is implemented with a solar PV. The mathematical model of the proposed systems ares tudied via simulation using Matlab/Simulink. The simulation results of a BLDC motor based on two multilevel inverters are compared with each other considering the THD and the utilization of the dc-bus voltage, the comparition verified that the clamped diode inverter has a better harmonic spectra.still the overshoot is a little bit high in the two types of inverter that are proposed.

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Faiz Minai, Ahmad, Akhlaque Ahmad Khan, Rupendra Kumar Pachauri, Hasmat Malik, Fausto Pedro García Márquez, and Alfredo Arcos Jiménez. "Performance Evaluation of Solar PV-Based Z-Source Cascaded Multilevel Inverter with Optimized Switching Scheme." Electronics 11, no. 22 (November 12, 2022): 3706. http://dx.doi.org/10.3390/electronics11223706.

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AC loads may demand a fixed or variable voltage at their input terminals. When using inverters to power such loads, the response of the inverter must be precisely controlled to suit the demands of the AC loads. Inverters with higher efficiency and sensitivity will play an increasingly essential role as the need for solar PV applications in prospective green technology grows. To increase power quality and provide a reliable power source, an inverter architecture with harmonic reduction approaches is proposed. The multilevel inverter (MLI), unlike conventional inverters, is developed by cascaded single inverter units and is often used to connect renewable energy sources. As a result, they can be utilized to efficiently reduce harmonics. Among the three topologies, the most widely used in industries is the neutral-point clamped MLI. When the levels are raised, however, they demand a larger number of diodes. When the level of the flying capacitor exceeds three, several capacitors are necessary. As a result, the optimum option for synthesizing the right output voltage from several DC sources is a cascaded multilevel inverter (CMLI). Each link in a CMLI is connected by a single DC source; therefore, there is no voltage imbalance. However, getting equal DC voltages at the input of each unit is once again a limitation. In this work, various existing multilevel inverter topologies including hybrid topologies with different switching strategies are investigated and reported. The performance of a solar PV-based seven-level quasi-Z-source cascaded H-Bridge MLI (qZS-CHBMLI) has been thoroughly examined with the best switching scheme and best topology of multilevel inverters using MATLAB/Simulink.

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Escalante, M. F., J. C. Vannier, and A. Arzande. "Flying capacitor multilevel inverters and DTC motor drive applications." IEEE Transactions on Industrial Electronics 49, no. 4 (August 2002): 809–15. http://dx.doi.org/10.1109/tie.2002.801231.

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Pratomo, Leonardus Heru, and Slamet Riyadi. "Design and implementation of a single-phase five-level inverter using a DC Source with voltage balancer on capacitor." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 2 (June 1, 2021): 902. http://dx.doi.org/10.11591/ijpeds.v12.i2.pp902-912.

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The global use of renewable energy resources has led to the design and development of high performance, efficient, controllable, and cheap multilevel inverters, which act as a solution to the numerous power deficiencies. However, in terms of control, these multilevel inverters are often associated with DC sources and complexity. Therefore, this research designed a single-phase five-level inverter using a DC source, with a novel sinusoidal pulse-width-modulated (SPWM) control scheme. The system consists of a Flying Capacitor DC-DC Converter and H-Bridge Inverter (FCDCDC-HBI). A single absolute reference signal and the phase-shifted triangular carrier were used to generate SPWM to enhance the capacitor voltage balance. The designed inverter is capable of producing five levels of output voltage levels, namely Vi, Vi/2, 0, −Vi/2, and −Vi from a DC supply, thereby reducing the overall cost and complexity of the SPWM system. This research also produced a detailed operation principle of the proposed system, which was verified through simulation and implemented using a prototype. Finally, hardware implementation results are presented to check the performance of the inverter.

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Meraj, Sheikh Tanzim, Nor Zaihar Yahaya, Kamrul Hasan, Molla Shahadat Hossain Lipu, Ammar Masaoud, Sawal Hamid Md Ali, Aini Hussain, Muhammad Murtadha Othman, and Farhan Mumtaz. "Three-Phase Six-Level Multilevel Voltage Source Inverter: Modeling and Experimental Validation." Micromachines 12, no. 9 (September 21, 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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Rezini, Saliha, and Zin-Eddine Azzouz. "Contribution of Multilevel Inverters in Improving Electrical Energy Quality: Study and Analysis." European Journal of Electrical Engineering 23, no. 3 (June 21, 2021): 255–63. http://dx.doi.org/10.18280/ejee.230310.

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The work proposed in this paper concerns the study of harmonic pollution generated by static converters, particularly inverters, which largely contributes to the degradation of the supplied electrical energy quality. So, we studied in first the EMC of the conventional two-level inverter to highlight the harmful pollution of this kind of converter. We then looked at multi-level inverters to characterize their degree of pollution according to their number of levels in order to propose practical solutions for industrial applications. Thus, we considered three structures of multi-level inverters namely: a diode clamped inverter, a flying capacitor clamped inverter and a cascaded h-bridge inverter. At the end of this study, we retain that these three structures make it possible to obtain a waveform of the output voltage close to the sinusoidal form. The results of simulation obtained and compared to the STD international standard templates, also allowed us to conclude that among the three structures studied the cascaded h-bridge inverter is the most interesting from the electrical energy quality point of view. In addition, this converter has the advantage of owning a reduced number of switches which results in a weight and a cost, better than those of the other two studied inverters.

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Corzine, K. A., and X. Kou. "Capacitor voltage balancing in full binary combination schema flying capacitor multilevel inverters." IEEE Power Electronics Letters 1, no. 1 (March 2003): 2–5. http://dx.doi.org/10.1109/lpel.2003.814644.

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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 (August 13, 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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Xu, Hong Yan. "Based Flying Capacitor Converter Wind Power Generator System." Advanced Materials Research 143-144 (October 2010): 1401–5. http://dx.doi.org/10.4028/www.scientific.net/amr.143-144.1401.

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Direct drive wind power system need full-scale high power converter, such as flying capacitor multilevel converter. On the realization of high power electronic equipment, an important problem is that the working frequency of high power devices is too low to apply excellent modulated technique such as PWM. In large-power equipment, the switching frequency of power electronics devices is such low that good control performance can't be obtained with a single converter. In order to overcome this problem, Carrier phase-shifted SPWM technique (CPS-SPWM) has been researched. Reactive power compensation and harmonic reduction are two relevant research problems that exist in wind power system. With the advancement of modern power electronics technology in both circuits and devices, new and better solutions are being proposed and applied to solve these two problems. To compensate reactive power, a flying capacitor type multilevel inverters with a Carrier Phase-Shifted SPWM(CPS-SPWM) switching scheme is proposed. All this verified by simulation and experiment.

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Andela, Madhu, Ahmmadhussain Shaik, Saicharan Beemagoni, Vishal Kurimilla, Rajagopal Veramalla, Amritha Kodakkal, and Surender Reddy Salkuti. "Solar Photovoltaic System-Based Reduced Switch Multilevel Inverter for Improved Power Quality." Clean Technologies 4, no. 1 (January 2, 2022): 1–13. http://dx.doi.org/10.3390/cleantechnol4010001.

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This paper deals with a reduced switch multi-level inverter for the solar photovoltaic system-based 127-level multi-level inverter. The proposed technique uses the minimum number of switches to achieve the maximum steps in staircase AC output voltage when compared to the flying capacitor multi-level inverter, cascaded type multilevel inverter and diode clamped multi-level inverter. The use of a minimum number of switches decreases the cost of the system. To eliminate the switching losses, in this topology a square wave switch is used instead of pulse width modulation. Thereby the total harmonic distortion (THD) and harmonics have been reduced in the pulsating AC output voltage waveform. The performance of 127-level MLI is compared with 15 level, 31-level and 63-level multilevel inverters. The outcomes of the solar photovoltaic system-based 127-level multi-level inverter have been simulated in a MATLAB R2009b environment.

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Jabberi, Henda, and Faouzi Ben Ammar. "New advanced concept of the flying capacitor asymmetric multilevel voltage source inverter." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 3 (May 8, 2018): 1166–88. http://dx.doi.org/10.1108/compel-04-2017-0168.

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Purpose To improve the voltage quality in AC adjustable high-power-speed-drive applications, the purpose of the paper is to provide a large number of output levels without increasing the number of commutation cells in the three-phase, n-cells flying capacitor voltage source asymmetric Multilevel Inverter (MI). The concept is based on the selection of different ratios between the breakdown voltages of two successive power devices. The new mathematical model is developed under various ratios, allows a thorough investigation of the harmonic distortions, flying capacitor energy storage, flying capacitor voltage balancing controllability and blocking voltage insulated gate bipolar transistor (IGBT) capability. Design/methodology/approach The asymmetrical design provides a large number of output levels without increasing the number of commutation cells. The important new analytical expression of capacitors voltage distribution is derived and extended to any ratio between the switch breakdown voltages of two successive power devices. Findings The detailed simulation study of the proposed concept has been carried out using MATLAB/Simulink. The power switches control of the three-phase three-cell MI is assured by new phase-shifted-multi-carrier pulse width modulation. The space vector representation is used to show the regular and irregular step output voltage in the complex plan (α,β). Originality/value In the paper, the n cells flying capacitor inverter, which typically operates in the (n + 1) levels mode, was extended to (n + 2), (n + 3) … until 2n levels with regular or irregular step output voltage. Consequently, the claimed advantages of the asymmetric MI are to improve power quality by reducing harmonic distortions and to reduce the requirement on capacitive energy storage in the circuit.

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Rehaoulia, Abir. "Voltage THD limits for three- and single-phase multilevel inverters." Journal of Electrical Engineering 73, no. 5 (September 1, 2022): 363–67. http://dx.doi.org/10.2478/jee-2022-0050.

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Abstract This paper deals with single and three phase multilevel inverters power quality. The voltage total harmonic distortion rate is an important criterion for choosing the number of inverter levels and checking compatibility with power quality requirements. In this study, the author raises an interesting issue related to the definition of voltage THD boundaries with upper and lower limits. The problem is reformulated, and a novel and more practical approach is developed for three- and single-phase multilevel inverters. Found upper and lower voltage THD limits are sufficiently verified with most known switching algorithms like sinusoidal modulation (SM) with phase disposition (PD), space vector modulation (SVM) and selective harmonic elimination (SHE). They are also valid for cascaded (H-Bridge), neutral point clamped (NPC) and flying capacitors (FC) multilevel inverters.

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Dargahi, Saeedeh, Ebrahim Babaei, Soheila Eskandari, Vahid Dargahi, and Mehran Sabahi. "Flying‐capacitor stacked multicell multilevel voltage source inverters: analysis and modelling." IET Power Electronics 7, no. 12 (December 2014): 2969–87. http://dx.doi.org/10.1049/iet-pel.2013.0902.

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Miao, Chang Xin, Li Ping Shi, Gui Lin Li, and Hong Yan Wang. "Relationship on Flying Capacitor Multilevel Inverter Switching Loss Minimized PWM Method." Advanced Materials Research 433-440 (January 2012): 5528–35. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.5528.

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The paper studies a switching loss minimized PWM method for flying capacitor multilevel inverter. Using the method, each phase of the flying capacitor multilevel inverter can have the 120° no switching zone in one period; according to power factor angle, 120° no switching zone can be adjusted to be farthest located in the centre of the peak value region of the load current, the switching loss can be greatly reduced and the efficiency of the system can be greatly improved. the simulation and experimental results show that switching loss of 33％is reduced.

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Zhang, L., and S. J. Watkins. "Capacitor voltage balancing in multilevel flying capacitor inverters by rule-based switching pattern selection." IET Electric Power Applications 1, no. 3 (2007): 339. http://dx.doi.org/10.1049/iet-epa:20060270.

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Majdoul, Radouane, Abelwahed Touati, Abderrahmane Ouchatti, Abderrahim Taouni, and Elhassane Abdelmounim. "A nine-switch nine-level converter new topology with optimal modulation control." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 2 (June 1, 2021): 932. http://dx.doi.org/10.11591/ijpeds.v12.i2.pp932-942.

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Multilevel power converters are becoming increasingly used in several sectors: energy, grid-tie renewable energy systems, High voltage direct current (HVDC) power transmission, and a multitude of industrial applications. However, the multilevel converters consist of several drives and a high number of power switches, which leads to a considerable cost and an increased size of the device. Thus, a novel topology of a multilevel bidirectional inverter using a reduced number of semiconductor power components is proposed in this paper. Without any diode clamped or flying capacitor, only nine switches are used to generate nine voltage levels in this new topology. The proposed multilevel converter is compared with the conventional structures in terms of cost, the number of active power switches, clamped diodes, flying capacitors, DC floating capacitors, and the number of DC voltage sources. This comparative analysis shows that the proposed topology is suitable for many applications. For optimum control of this multilevel voltage inverter and to reduce switching losses in power semiconductors, a hybrid modulation technique based on fundamental frequency modulation and multi-carrier-based sinusoidal pulse-width modulation schemes is performed. The effectiveness of the proposed multilevel power converter is verified by simulation results.

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Rabelo Joca, Davi, Luiz Henrique Silva Colado Barreto, Demercil de Souza Oliveira Júnior, Gustavo Alves de Lima Henn, and Ranoyca Nayana Alencar Leão e Silva. "Modulation Technique Applied For Thd Reduction In 3-level Flying Capacitor Multilevel Inverter." Eletrônica de Potência 19, no. 2 (May 1, 2014): 173–81. http://dx.doi.org/10.18618/rep.2014.2.173181.

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Yaqoob, Muhammad Tayyab, Mohd Khairil Rahmat, Siti Marwangi Mohamad Maharum, and Mazliham Mohd Su’ud. "A Review on harmonics elimination in real time for cascaded H-bridge multilevel inverter using particle swarm optimization." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 1 (March 1, 2021): 228. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp228-240.

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Renewable energy has a great importance for power generation as it does not use the fossils fuels. Energy generated from alternative energy sources are weather dependent. To generate a continuous power to meet the load requirements, Battery energy storage system are used. Power conversion process must be much efficient as possible to convert the DC stored energy into AC. This conversion process is usually done by the help of inverters. This paper gives the brief overview on three main categories of multilevel inverter like cascaded h-bridge, neutral point clamped and flying capacitor multilevel inverter and highlights their advantages which can also help the scholars to deeply explore the categories of multilevel inverter. Harmonic elimination is usually done by controlling the switching angles of the inverter. Among all the switching angles techniques, selective harmonic elimination pulse width modulation (SHEPWM) technique is widely used, that has also discussed in this paper. Furthermore, to eliminate the harmonics using SHEPWM, it has the set of nonlinear transcendental equations, these set of equations can be effieceintly solved by the optimization methods. The most efficient and reliable optimization method like particle swarm optimization has been discussed with multiple objective functions in this paper. This paper will help the scholars to understand the finest category of multilevel inverter for harmonic elimination in terms of efficiency and output quality.

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Fard, Majid T., Waqar A. Khan, Jiangbiao He, Nathan Weise, and Mostafa Abarzadeh. "Fast online diagnosis of open-circuit switching faults in flying capacitor multilevel inverters." Chinese Journal of Electrical Engineering 6, no. 4 (December 2020): 53–62. http://dx.doi.org/10.23919/cjee.2020.000030.

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Fard, Majid T., Waqar A. Khan, Jiangbiao He, Nathan Weise, and Mostafa Abarzadeh. "Fast online diagnosis of open-circuit switching faults in flying capacitor multilevel inverters." Chinese Journal of Electrical Engineering 6, no. 4 (December 2020): 53–62. http://dx.doi.org/10.23919/cjee.2020.000030.

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Amini, Jalal, and Mehrdad Moallem. "A Fault-Diagnosis and Fault-Tolerant Control Scheme for Flying Capacitor Multilevel Inverters." IEEE Transactions on Industrial Electronics 64, no. 3 (March 2017): 1818–26. http://dx.doi.org/10.1109/tie.2016.2624722.

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Hadj Benali, Farouk, and Fouad Azzouz. "Comparison of Flying Capacitor Fifteen Level Inverter and Thirty Three Level Inverter PWM Control Strategies." Indonesian Journal of Electrical Engineering and Computer Science 6, no. 2 (May 1, 2017): 368. http://dx.doi.org/10.11591/ijeecs.v6.i2.pp368-378.

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In the paper two PWM control strategies of multilevel flying capacitor inverter is proposed. The study starts with a presentation of the Flying capacitor inverter and the two PWM control strategies (SPWM and Suboptimal PWM). Than a section which presents a brief recall of the triangular multicarrier PWM and the sinusoidal multicarrier PWM. A comparison between the two PWM control strategies based on the simulation results is made. The subjects of comparison are the root mean square rms of the output voltage and the total harmonic distortion THD. The obtained results have proved that the Suboptimal PWM is better than the SPWM. Simulations are carried out by PSIM program.

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Prasadarao K, V. S., and V. Joshi Manohar. "Grid Interconnection of PV System Using Symmetric and Asymmetric MLI Topology." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 4 (December 1, 2018): 1616. http://dx.doi.org/10.11591/ijpeds.v9.i4.pp1616-1623.

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Generally, PV cell converts sunlight into electricity in the form of dc. Integration of PV system with the existing grid requires dc-ac conversion. This conversion is possible with the help of a dc-ac converter known as an inverter. Among all types of the inverter, multilevel inverters (MLIs) are playing a major role with all their major privileges like High power quality, low distortion, less blocking voltages for switching devices. Conventional multilevel inverter topologies such as diode clamped, flying capacitor and cascaded MLIs are having so many disadvantages. One of the common disadvantage among all the conventional MLIs is the requirement of more number of power electronic components as the level of the output voltage increase. To reduce the power electronic components this paper proposes a multilevel inverter topology in symmetrical and asymmetrical configuration. The proposed MLI uses 12 switches and 19 diodes which are very less compared to conventional MLI topologies for generates nine and thirteen level output voltages. Comparison between presented MLI topology and conventional MLI topologies is presented in this paper. Finally, the proposed MLI whose input is fed from the PV system is integrated into the grid. The proposed concept is validated by using the MATLAB/SIMULINK software and the appropriate results are presented in this paper.

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Shukla, A., A. Ghosh, and A. Joshi. "Improved Multilevel Hysteresis Current Regulation and Capacitor Voltage Balancing Schemes for Flying Capacitor Multilevel Inverter." IEEE Transactions on Power Electronics 23, no. 2 (March 2008): 518–29. http://dx.doi.org/10.1109/tpel.2007.915788.

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Guo, Xiaoqiang, Xuehui Wang, Ran He, and Mehdi Narimani. "Modeling and Modulation of NNPC Four-Level Inverter for Solar Photovoltaic Power Plant." International Journal of Photoenergy 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/2383872.

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Photovoltaic (PV) power plant is an attractive way of utilizing the solar energy. For high-power PV power plant, the multilevel inverter is of potential interest. In contrast to the neutral-point clamped (NPC) or flying capacitor (FC) multilevel inverter, the nested neutral point clamped (NNPC) four-level inverter has better features for solar photovoltaic power plant. In practical applications, the common mode voltage reduction of the NNPC four-level is one of the important issues. In order to solve the problem, a new modulation strategy is proposed to minimize the common mode voltage. Compared with the conventional solution, our proposal can reduce the common mode voltage to 1/18 of the DC bus voltage. Moreover, it has the capability to balance the capacitor voltages. Finally, we carried out time-domain simulations to test the performance of the NNPC four-level inverter.

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Prasad, P. Siva, and Dr G. Annapurna. "Analysis of Modified Five Level Flying Capacitor Based Multilevel Inverter." International Journal of Research in Advent Technology 7, no. 6 (June 10, 2019): 140–48. http://dx.doi.org/10.32622/ijrat.762019104.

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Kou, X., K. A. Corzine, and Y. L. Familiant. "A Unique Fault-Tolerant Design for Flying Capacitor Multilevel Inverter." IEEE Transactions on Power Electronics 19, no. 4 (July 2004): 979–87. http://dx.doi.org/10.1109/tpel.2004.830037.

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Ahmad, Anzar, MU Anas, Adil Sarwar, Mohammad Zaid, Mohd Tariq, Javed Ahmad, and Abdul R. Beig. "Realization of a Generalized Switched-Capacitor Multilevel Inverter Topology with Less Switch Requirement." Energies 13, no. 7 (March 27, 2020): 1556. http://dx.doi.org/10.3390/en13071556.

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Conventional multilevel inverter topologies like neutral point clamped (NPC), flying capacitor (FC), and cascade H bridge (CHB) are employed in the industry but require a large number of switches and passive and active components for the generation of a higher number of voltage levels. Consequently, the cost and complexity of the inverter increases. In this work, the basic unit of a switched capacitor topology was generalized utilizing a cascaded H-bridge structure for realizing a switched-capacitor multilevel inverter (SCMLI). The proposed generalized MLI can generate a significant number of output voltage levels with a lower number of components. The operation of symmetric and asymmetric configurations was shown with 13 and 31 level output voltage generation, respectively. Self-capacitor voltage balancing and boosting capability are the key features of the proposed SCMLI structure. The nearest level control modulation scheme was employed for controlling and regulating the output voltage. Based on the longest discharging time, the optimum value of capacitance was also calculated. A generalized formula for the generation of higher voltage levels was also derived. The proposed model was simulated in the MATLAB®/Simulink 2016a environment. Simulation results were validated with the hardware implementation.

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Shamiksha, Vande, and Khare Aaditya. "7 level symmetrical inverter for photovoltaic system." i-manager’s Journal on Electronics Engineering 13, no. 1 (2022): 1. http://dx.doi.org/10.26634/jele.13.1.19299.

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This research presents the design, implementation, and evaluation of a seven-level symmetrical inverter for photovoltaic systems. The inverter is based on a cascaded H-bridges topology with distinct DC assets and is capable of efficiently converting DC power from a photovoltaic system to AC power with low Total Harmonic Distortion (THD). The system consists of a solar panel, charge controller, battery bank, and a multilevel inverter circuit. The inverter employs Pulse Width Modulation (PWM) techniques to control the output voltage and frequency, ensuring that it is suitable for the AC load. The performance of the inverter is analyzed using Fast Fourier Transform (FFT) to determine the THD, and the results are compared with those of other multilevel inverter topologies such as diode clamped (neutral clamped) and flying capacitors. The efficiency of the seven-level symmetrical inverter is evaluated under different load conditions and compared with other multilevel inverters to determine potential energy savings and performance improvements. The analysis provides insights into the advantages and limitations of the seven-level symmetrical inverter for photovoltaic systems, highlighting the importance of distinct DC assets in achieving high efficiency and low THD. The results of this research can be useful for designing and implementing high-performance and cost-effective photovoltaic systems.

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Farah, Nabil, Jurifa Bt. Mat Lazi, and MHN Talib. "Comparative Study of Three Different Topologies of Five-Level Inverter with SPWM Modulation Technique." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 4 (December 1, 2017): 1612. http://dx.doi.org/10.11591/ijpeds.v8.i4.pp1612-1621.

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Multilevel Inverter (MLI) has attracted a great attention by different researchers and industries due to its capability in handling high power application and minimizing the harmonics contents in the output. This study propose three different topologies of MLI (5-level) which are Cascaded H-Bridge Multilevel Inverter (CHMLI) ,Diode Clamped Multilevel Inverter and Flying Capacitor Multilevel Inverter (FCMLI) .These three topologies have been modelled in MATLAB/SIMULINK and compared in terms of THD and number of components used. Sinusoidal Pulse Width Modulation is utilized to control both of the topologies with same DC source. The results showed that ,CHMLI is superior compared to DCMLI and FCMLI in which the CHMLI produce 26.29% THD while DCMLI and FCMLI produce 29.14% and 33.53% respectively .Moreover less components and switching losses is obtained when using the CHMLI.

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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 (September 1, 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) < 1 (under amplitude modulation index), ma=1 (normal amplitude modulation index) and ma > 1 (over amplitude modulation index).

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Humayun, Muhammad, Muhammad Mansoor Khan, Mahmood Ul Hassan, and Weidong Zhang. "Analysis of hybrid switches symmetric flying capacitor multilevel inverter based STATCOM." International Journal of Electrical Power & Energy Systems 131 (October 2021): 107054. http://dx.doi.org/10.1016/j.ijepes.2021.107054.

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Manai, Lazhar, Donia Hakiri, and Mongi Besbes. "Backstepping control of flying capacitor multilevel inverter‐based active power filter." IET Power Electronics 13, no. 19 (December 2020): 4610–24. http://dx.doi.org/10.1049/iet-pel.2020.0734.

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Kim, I. D., E. C. Nho, H. G. Kim, and J. S. Ko. "A Generalized Undeland Snubber for Flying Capacitor Multilevel Inverter and Converter." IEEE Transactions on Industrial Electronics 51, no. 6 (December 2004): 1290–96. http://dx.doi.org/10.1109/tie.2004.837917.

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Kang, D. W., W. K. Lee, and D. S. Hyun. "Carrier-rotation strategy for voltage balancing in flying capacitor multilevel inverter." IEE Proceedings - Electric Power Applications 151, no. 2 (2004): 239. http://dx.doi.org/10.1049/ip-epa:20040220.

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Humayun, Muhammad, Muhammad Mansoor Khan, Ali Muhammad, Jianming Xu, and Weidong Zhang. "Evaluation of symmetric flying capacitor multilevel inverter for grid-connected application." International Journal of Electrical Power & Energy Systems 115 (February 2020): 105430. http://dx.doi.org/10.1016/j.ijepes.2019.105430.

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Hemici, K., A. Zegaoui, A. Aissa Bokhtache, M. O. Mahmoudi, and M. Aillerie. "Three-Phases Flying-Capacitor Multilevel Inverter with Proportional Natural PWM Control." Energy Procedia 74 (August 2015): 1061–70. http://dx.doi.org/10.1016/j.egypro.2015.07.744.

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Journal articles on the topic 'Flying Capacitor Multilevel Inverters'

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