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Proceedings ArticleDOI: 10.1109/ICCPCT.2014.7054952

Simulation of a transistor clamped H-bridge multilevel inverter and its comparison with a conventional H-bridge multilevel inverter

20 Mar 2014-pp 958-963
Abstract: Double reference single carrier modulation technique is a new technique employed for generating pulses for multilevel inverters. This paper presents a simulation of a transistor clamped H-bridge multilevel inverter using double reference single carrier modulation technique. Using the modulation technique, output voltage, output current and voltage stress across the switches of the transistor clamped multilevel inverter is obtained. The total harmonic distortion obtained for different values of the modulation index is presented. Further, the paper aims to perform a comparison of a transistor clamped H-Bridge multilevel inverter with a conventional cascaded H-Bridge multilevel inverter. The comparison is done with respect to complexity of the circuit topologies and total harmonic distortion obtained with both the multilevel inverters. Results are obtained using simulations done in MATLAB Simulink environment.

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Topics: Modulation index (56%), H bridge (55%), Total harmonic distortion (53%) ...read more
Citations
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Proceedings ArticleDOI: 10.1109/ICECCT.2019.8869424
01 Feb 2019-
Abstract: In the recent years the multilevel inverters were widely discussed topic for researchers. Because of few merits of having good power quality. Basically inverter is a converter, which is capable in converting the DC power into AC power at desired level. The two level output, zero or positive or negative V dc can be obtained by voltage source inverter(VSI). The multilevel inverter is capable to produce sinusoidal output voltage and to reduce Total Harmonic Distortion at desired voltage level. As we increase the level of voltage, the output power quality gets improved, i.e. THD gets reduced. This paper proposes the implementation and analysis of cascaded multilevel inverter with reduce THD. The implemented Cascaded H-bridge Multilevel Inverter topology is a practical topology; it provides the generalized path to increase the level of multilevel inverter as we want. In the represented model of eleven level single phase Cascaded H-bridge Multilevel Inverter has been designed using IGBT in order to generate the different output voltage levels at proper intervals, the conduction angle of IGBTs have been controlled by varying the pulse width of getting signals. Simulation models is developed in MATLAB-SIMULINK of eleven levels inverters and THD analysis is performed.

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Topics: Inverter (58%), Total harmonic distortion (57%), H bridge (56%) ...read more

18 Citations


Open accessJournal ArticleDOI: 10.17694/BAJECE.510412
30 Apr 2019-
Abstract: This paper presents an improved hysteresis current control method for five level T-type inverter. The proposed method is based on four hysteresis levels and performed to generate switching signals of fundamental transistors in T-type inverter. By using generated signals through hysteresis controller, bidirectional switch in T-type inverter is triggered through the logical way. The system is detailed in analytical expression and exhibited to generate five voltage levels at the output of inverter. The improved technique is based on an error signal between the output current and the reference value. Therefore, the proposed modulation technique achieves the following output current at the desired value and ensures high-efficiency conversion ratio at the output. In order to show the validity of the proposed method, the controller is compared with conventional sinusoidal pulse width modulated T-type inverter. In performance results, it is obvious that the proposed method provides a lower total harmonic distortion in comparison with conventional method.

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Topics: Inverter (60%), Total harmonic distortion (54%), Control theory (53%) ...read more

6 Citations


Journal ArticleDOI: 10.1109/TASC.2018.2806914
Abstract: This paper deals with a pulsed power supply system combining flywheel energy storage system (FESS) and a modular multilevel cascade converter (MMCC) for power compensation in performing rapid excitation of highly inductive and pulsed heavy loads. The FESS system consists of an induction motor with a flywheel to store kinetic energy. Parallelly connected capacitors cause self-excitation phenomena in an induction motor, and it works as an induction generator. Furthermore, the induction generator generates more than twice of electric power of its rated value for a short time. We can apply the proposed FESS to particle accelerators for physics experiments or medical use, and plasma shape and position control in pulsed nuclear fusion devices that require pulsed highpower. In addition, the coils in these applications that generate magnetic fields have large inductances. In plasma control and repetitive operation applications, it is necessary to change current rapidly. We can realize high-speed current control by using the proposed MMCC that can output a voltage higher than the input voltage. By combining the FESS and MMCC, a power supply may be realized with the ability to implement rapid current control while compensating for large power consumption and without significant load disturbance on the power grid.

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Topics: Induction generator (59%), Flywheel (57%), Cascade converter (56%) ...read more

5 Citations


Open accessJournal ArticleDOI: 10.3390/ELECTRONICS8090917
21 Aug 2019-Electronics
Abstract: The paper deals with arrays of numerous power conversion cells, associated in series and/or in parallel to build larger step up or step down direct current (DC)/DC isolated converters. The work focuses on the impact of the spread and distribution of the conversion cell characteristics on the characteristics and performance of the power converter array (PCA). Based on a characterization protocol, about 130 conversion standard cells (CSC) are characterized and classified from a statistical point of view. Three families are defined and representatives are chosen and implemented in various configurations, in open and closed loop control, to analyze the impact of their spread characteristic over the global converter, the PCA. The paper is based on an extended practical set up and protocols, all described in details. Guidelines on CSCs implementation with respect to their dispersion are provided at the end on the paper.

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Topics: Low voltage (54%), Direct current (51%), Converters (50%) ...read more

Proceedings ArticleDOI: 10.1109/ICIET48527.2019.9290714
23 Dec 2019-
Abstract: Due to modularity structure, voltage balancing, reliability and lower stresses on switching devices, cascaded H-bridge (CHB) multilevel topology is a good choice for high-power medium-voltage applications. Therefore, phase- and level-shifted PWM scheme based seven-level CHB inverter is presented in this paper. In-phase disposition (IPD) multicarrier technique is used for level-shifted PWM as it provides the best harmonic profile in compared to other techniques. In addition to that fundamental output voltage phase shift compensation based fault-tolerant control strategy is presented which maintains the balanced three-phase currents during faulty conditions. Simulation for seven-level CHB inverter and fault-tolerant control topology is carried out extensively in MATLAB/Simulink software. It is found that although having different device switching frequency, the total harmonic distortion (THD) of the inverter output line-to-line voltage is better with IPD level-shifted in compared to phase-shifted PWM schemes.

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Topics: Total harmonic distortion (56%), Inverter (55%), Topology (electrical circuits) (53%) ...read more

References
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Journal ArticleDOI: 10.1109/TIE.2009.2030767
Abstract: Cascaded multilevel inverters synthesize a medium-voltage output based on a series connection of power cells which use standard low-voltage component configurations. This characteristic allows one to achieve high-quality output voltages and input currents and also outstanding availability due to their intrinsic component redundancy. Due to these features, the cascaded multilevel inverter has been recognized as an important alternative in the medium-voltage inverter market. This paper presents a survey of different topologies, control strategies and modulation techniques used by these inverters. Regenerative and advanced topologies are also discussed. Applications where the mentioned features play a key role are shown. Finally, future developments are addressed.

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Topics: Inverter (51%)

1,872 Citations


Journal ArticleDOI: 10.1109/TIE.2008.928116
Jeyraj Selvaraj1, Nasrudin Abd Rahim1Institutions (1)
Abstract: This paper presents a single-phase five-level photovoltaic (PV) inverter topology for grid-connected PV systems with a novel pulsewidth-modulated (PWM) control scheme. Two reference signals identical to each other with an offset equivalent to the amplitude of the triangular carrier signal were used to generate PWM signals for the switches. A digital proportional-integral current control algorithm is implemented in DSP TMS320F2812 to keep the current injected into the grid sinusoidal and to have high dynamic performance with rapidly changing atmospheric conditions. The inverter offers much less total harmonic distortion and can operate at near-unity power factor. The proposed system is verified through simulation and is implemented in a prototype, and the experimental results are compared with that with the conventional single-phase three-level grid-connected PWM inverter.

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Topics: Grid-tie inverter (65%), Inverter (58%), Photovoltaic system (55%) ...read more

550 Citations


Journal ArticleDOI: 10.1016/J.ENCONMAN.2010.09.006
Abstract: In this study, the most common multilevel inverter topologies and control schemes have been reviewed. Multilevel inverter topologies (MLIs) are increasingly being used in medium and high power applications due to their many advantages such as low power dissipation on power switches, low harmonic contents and low electromagnetic interference (EMI) outputs. The selected switching technique to control the inverter will also have an effective role on harmonic elimination while generating the ideal output voltage. Intensive studies have been performed on carrier-based, sinusoidal, space vector and sigma delta PWM methods in open loop control of inverters. The selection of topology and control techniques may vary according to power demands of inverter. This paper and review results constitute a useful basis for matching of inverter topology and the best control scheme according to various application areas.

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Topics: Grid-tie inverter (65%), Inverter (58%), Topology (electrical circuits) (53%) ...read more

516 Citations


Journal ArticleDOI: 10.1016/J.ENCONMAN.2009.06.032
Abstract: In this paper, a new topology of cascaded multilevel inverter using a reduced number of switches, insulated gate driver circuits and voltage standing on switches is proposed. The proposed topology results in reduction of installation area and cost and has simplicity of control system. This structure consists of series connected sub-multilevel inverters blocks. Three algorithms for determination of magnitudes of dc voltage sources have been presented, too. Validity of the analysis has been proved by simulation and experimental results.

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Topics: Topology (electrical circuits) (59%), Series and parallel circuits (57%), H bridge (53%) ...read more

422 Citations


Journal ArticleDOI: 10.1109/TIE.2010.2044119
Abstract: Converters for photovoltaic (PV) systems usually consist of two stages: a dc/dc booster and a pulsewidth modulated (PWM) inverter. This cascade of converters presents efficiency issues, interactions between its stages, and problems with the maximum power point tracking. Therefore, only part of the produced electrical energy is utilized. In this paper, the authors propose a single-phase H-bridge multilevel converter for PV systems governed by a new integrated fuzzy logic controller (FLC)/modulator. The novelties of the proposed system are the use of a fully FLC (not requiring any optimal PWM switching-angle generator and proportional-integral controller) and the use of an H-bridge power-sharing algorithm. Most of the required signal processing is performed by a mixed-mode field-programmable gate array, resulting in a fully integrated System-on-Chip controller. The general architecture of the system and its main performance in a large spectrum of practical situations are presented and discussed. The proposed system offers improved performance over two-level inverters, particularly at low-medium power.

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Topics: Maximum power point tracking (59%), Inverter (58%), Photovoltaic system (54%) ...read more

362 Citations


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