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Proceedings ArticleDOI

Hardware realization and analysis of a seven level reduced switch inverter with space vector modulation technique

TL;DR: This paper investigates and compares the performance of a seven level inverter with conventional SPWM and a new multilevel multiphase SVPWM algorithm, and simulates the model in MATLAB/simulink and a low power prototype of the model is implemented in the laboratory to verify the simulation results.
Abstract: Multilevel inverters (MLI) are employed to enhance the performance of the motor drives, in which the performance improvement is depends on the modulation scheme and the number of power switches and associated components of MLI. Various limitations of conventional sinusoidal pulse width modulation (SPWM) technique result in drives with lesser efficiency. Space Vector Pulse Width Modulation (SVPWM) schemes are now becoming common in inverter systems due to its advantages over other techniques such as better utilization of input voltage and lesser total harmonic distortion especially from the drive system perspective. The disadvantage being the complex computations which increases with the number of voltages levels in MLI. This paper investigates and compares the performance of a seven level inverter with conventional SPWM and a new multilevel multiphase SVPWM algorithm. The model is simulated in MATLAB/simulink and a low power prototype of the model is implemented in the laboratory to verify the simulation results.
Citations
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Proceedings ArticleDOI
01 Feb 2017
TL;DR: This paper envisages to analyze and identify an optimal modulation technique for a reduced switch seven level MLI running an induction motor drive in closed loop through Indirect Field Oriented Control (IFOC).
Abstract: Recent evolution in power electronics and semiconductor switching devices has paved the way for amelioration of various power electronic systems. Hence, various multilevel inverter configurations have been put forward with reduced device count and increased output levels. Pulses with modulated (PWM) adjustable speed drives are employed in various industrial drive applications to achieve superior performance. Among which Sinusoidal PWM (SPWM) and Space Vector PWM (SVPWM) techniques are stands out. Space vector techniques are becoming common in industrial drive applications due to its improved harmonic profile and better DC bus utilization. This paper envisages to analyze and identify an optimal modulation technique for a reduced switch seven level MLI running an induction motor drive in closed loop through Indirect Field Oriented Control (IFOC). The SPWM and the SVPWM techniques are applied to a seven MLI fed induction motor drive. The performance of both systems is analyzed and compared using MATLAB/simulink tool.

4 citations


Cites methods from "Hardware realization and analysis o..."

  • ...The Steps of this algorithm are summarized [18-21] in the flowchart shown in Fig....

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Journal ArticleDOI
29 Jan 2022-Energies
TL;DR: In this paper , a decentralized space vector pulse width modulation (DSVPWM) method is proposed that can be applied to power converters with any number of cells and can be considered as a multilevel SVPWM method.
Abstract: This paper proposes a decentralized control structure and method for a multilevel single-phase power converter using space vector pulse width modulation (SVPWM). The focus of this paper is on the decentralized control structure for the power converter cells that will exchange information with neighboring cells in order to adjust the switching vector and switching time for each cell. In this study, the switching vectors and the corresponding switching times of each cell will be self-determined based on the phase angle of two neighboring cells. Normally, SVPWM applied to the multilevel power converters need complete information about the total cells and cell’s position to build a control algorithm. Meanwhile, a decentralized space vector pulse width modulation (DSVPWM) method is proposed that can be applied to power converters with any number of cells and can be considered as a multilevel SVPWM method. In addition, the decentralized multilevel single-phase power converter has high flexibility with which it is possible to easily adjust the number of active cells, so that the output voltage can be adjusted quickly; this provides the ability to dynamically reconfigure without interrupting the power energy supply process. The proposed control structure and method are effectively verified based on simulation and experimental results. Experimental results are evaluated based on a 9-level single-phase power converter, which has an RL load with rated parameters 220 V/500 W.

2 citations

Book ChapterDOI
24 Nov 2018
TL;DR: In this article, a Harmonic Search algorithm is used to determine optimum switching angles for a seven level inverter with reduced number of switches (asymmetrical inverter), which is an optimization algorithm inspired from the music improvisation process.
Abstract: Selective harmonic elimination pulse width modulation (SHEPWM) is modulation strategy particularly used to control high-power converters. The SHEPWM strategy allows the elimination of a specific order of harmonics and also controls the amplitude of the fundamental component of the output voltage. In this paper harmony search algorithm is used to determine optimum switching angles for a seven level inverter with reduced number of switches (asymmetrical inverter). Harmony search is an optimization algorithm inspired from the music improvisation process. The algorithm and the mathematical model of the power converter are developed in MATLAB. Simulation results are validated by an experimental setup using STM32F407 high-performance microcontroller.
DOI
26 Jun 2022
TL;DR: In this article , the authors proposed a control scheme for a leg of the MMC to make the balance of the Submodule Voltage Capacitor (VSM), which includes a Proportional Integral Resonant (PIR) Controller, which uses a Band-pass filter (BPF) to make selective attenuation of undesired harmonic components.
Abstract: In recent years, the High Voltage Direct Current (HVDC) based on a Modular Multilevel Converter (MMC) has become an attractive solution for the integration of Renewable Energy Sources (RES), especially wind energy, located at long distances from consumption centers. The operation of MMC terminal needs to accomplish stability in the main parameters of the electrical grid, such as voltage, phase, and frequency. To maintain these parameters in their typical values, the MMC needs to control the circulating currents, each voltage in the capacitor of the submodules, output current, and output voltage. This paper proposes a control scheme for a leg of the MMC to make the balance of the Submodule Voltage Capacitor (VSM). The proposed control scheme includes a Proportional Integral Resonant (PIR) Controller, which uses a Band-pass filter (BPF) to make the selective attenuation of undesired harmonic components. The control scheme is validated in Hardware in the Loop dSPACE and a scale-down MMC prototype. Results show that the resonant controller controls the output voltage and capacitor’s voltage in each submodule during normal operation. A comparison of time-domain simulations and experimental results is made in this paper. Analytical results show that the output voltage is a sinusoidal waveform rated at 150 V and 60 Hz, and the submodules’ balance is achieved.
References
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Journal ArticleDOI
TL;DR: The most important topologies like diode-clamped inverter (neutral-point clamped), capacitor-Clamped (flying capacitor), and cascaded multicell with separate DC sources are presented and the circuit topology options are presented.
Abstract: Multilevel inverter technology has emerged recently as a very important alternative in the area of high-power medium-voltage energy control. This paper presents the most important topologies like diode-clamped inverter (neutral-point clamped), capacitor-clamped (flying capacitor), and cascaded multicell with separate DC sources. Emerging topologies like asymmetric hybrid cells and soft-switched multilevel inverters are also discussed. This paper also presents the most relevant control and modulation methods developed for this family of converters: multilevel sinusoidal pulsewidth modulation, multilevel selective harmonic elimination, and space-vector modulation. Special attention is dedicated to the latest and more relevant applications of these converters such as laminators, conveyor belts, and unified power-flow controllers. The need of an active front end at the input side for those inverters supplying regenerative loads is also discussed, and the circuit topology options are also presented. Finally, the peripherally developing areas such as high-voltage high-power devices and optical sensors and other opportunities for future development are addressed.

6,472 citations


"Hardware realization and analysis o..." refers background in this paper

  • ...It has a lower dv/dt stress from the load perspective than the conventional two-level voltage source inverters [7]....

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Journal ArticleDOI
TL;DR: A survey of different topologies, control strategies and modulation techniques used by cascaded multilevel inverters in the medium-voltage inverter market is presented.
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.

2,111 citations


"Hardware realization and analysis o..." refers background in this paper

  • ...Consequently it will necessitate the reduction in power switches and associated components from a practical point of view [8]....

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Journal ArticleDOI
TL;DR: In this paper, the most relevant characteristics of multilevel converters, to motivate possible solutions, and to show that energy companies have to bet on these converters as a good solution compared with classic two-level converters.
Abstract: This work is devoted to review and analyze the most relevant characteristics of multilevel converters, to motivate possible solutions, and to show that we are in a decisive instant in which energy companies have to bet on these converters as a good solution compared with classic two-level converters. This article presents a brief overview of the actual applications of multilevel converters and provides an introduction of the modeling techniques and the most common modulation strategies. It also addresses the operational and technological issues.

1,847 citations

Journal ArticleDOI
20 Oct 2009
TL;DR: This paper serves as an introduction to the subject for the not-familiarized reader, as well as an update or reference for academics and practicing engineers working in the field of industrial and power electronics.
Abstract: Multilevel converters are considered today as the state-of-the-art power-conversion systems for high-power and power-quality demanding applications. This paper presents a tutorial on this technology, covering the operating principle and the different power circuit topologies, modulation methods, technical issues and industry applications. Special attention is given to established technology already found in industry with more in-depth and self-contained information, while recent advances and state-of-the-art contributions are addressed with useful references. This paper serves as an introduction to the subject for the not-familiarized reader, as well as an update or reference for academics and practicing engineers working in the field of industrial and power electronics.

949 citations

01 Jan 2009
TL;DR: In this paper, the authors present a tutorial on multilevel converters, covering the operating principle, modulation methods, technical issues and industry applications for high power and power-quality demanding applications.
Abstract: Multilevel converters are considered today as the state-of-the-art power-conversion systems for high-power and power-quality demanding applications. This paper presents a tutorialonthistechnology,coveringtheoperatingprincipleand the different power circuit topologies, modulation methods, technical issues and industry applications. Special attention is given to established technology already found in industry with more in-depth and self-contained information, while recent advances and state-of-the-art contributions are addressed with useful references. This paper serves as an introduction to the subject for the not-familiarized reader, as well as an update or reference for academics and practicing engineers working in the field of industrial and power electronics.

928 citations