Switching Characterization of Cascaded Multilevel-Inverter-Controlled Systems

Gupta, Rajesh; Ghosh, Arindam; Joshi, Avinash

doi:10.1109/tie.2007.896274

Cited by 150 publications

(64 citation statements)

References 18 publications

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“…Fig. 7 shows that the phase-shifted (PS) PWM method is the most commonly used modulation technique for cascaded multilevel inverters, because it offers a balanced power distribution among the cell modules and is very easy to implement regardless of the number of cascaded cell modules [15]. In the case of N-levels, this method needs N-1 carriers.…”

Section: A Phase Disposition Pwm Methodsmentioning

confidence: 99%

Voltage Source Equipment for the Grid Fault Testing and Analysis of Total Harmonic Distortion According to PWM Methods

Gwon¹,

Kim²,

Kang³

et al. 2014

Journal of Power Electronics

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Renewable energy is being spotlighted as the electric power generating source for the next generation. Due to an increase in renewable energy systems in the grid system, their impact on the grid has become non-negligible. Thus, many countries in the world, including Europe, present their own grid codes for grid power conversion devices. In order to experiment with these grid codes, grid fault test equipment is required. This paper proposes both equipment and a control method, which are constructed with a 7-level cascaded H-bridge converter, that are capable of generating various grid faults. In addition, the Pulse Width Modulation (PWM) method for multilevel converters is compared and analyzed. The proposed structure, the control method, and the PWM method are verified through simulation and experimental results.

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Section: A Phase Disposition Pwm Methodsmentioning

confidence: 99%

Voltage Source Equipment for the Grid Fault Testing and Analysis of Total Harmonic Distortion According to PWM Methods

Gwon¹,

Kim²,

Kang³

et al. 2014

Journal of Power Electronics

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“…Phase-shifted PWM (PS-PWM) is the most commonly used modulation technique for cascaded multilevel converters, because it offers an even power distribution among all of the HBMs, and it is very easy to implement independent of the number of series HBMs [18]. This modulation shifts the phase of each carrier signal in a proper angle to reduce the harmonic content of the passing current from each leg and to lower the output current ripple of the MMC (see Fig.…”

Section: B Hbm Switching Modulation Signalsmentioning

confidence: 99%

Modular Multilevel Converter Based STATCOM Topology Suitable for Medium-Voltage Unbalanced Systems

Pirouz¹,

Bina²

2010

Journal of Power Electronics

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This paper discusses a transformerless shunt static compensator (STATCOM) based on a modular multilevel converter (MMC). It introduces a new time-discrete appropriate current control algorithm and a phase-shifted carrier modulation strategy for fast compensation of the reactive power and harmonics, and also for the balancing of the three-phase source side currents. Analytical formulas are derived to demonstrate the accurate mechanism of the stored energy balancing inside the MMC. Various simulated waveforms verify that the MMC based STATCOM is capable of reactive power compensation, harmonic cancellation, and simultaneous load balancing, while controlling and balancing all of the DC mean voltages even during the transient states.

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“…It reduces line harmonics, improves power factor and high reliability [2]. The method of triangular carrier switching control of two level inverters is extended for the cascaded multilevel inverter controlled systems [3]. This paper presents a survey of different topologies, control strategies and modulation techniques of cascaded multilevel inverter [4].…”

Section: Introductionmentioning

confidence: 99%

Z–Source Multilevel Inverter Based on Embedded Controller

Vijayalakshmi

Balamurugan

2017

IJEECS

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In this paper Embedded based Z-source multilevel inverter (ZSMLI) is proposed. This work implements a five level cascaded H-bridge Z-source inverter by using embedded control. Switching devices are triggered using embedded controller. In this controller coding is described by using switching Keywords: Z-source multilevel inverter, embedded controller, RMS, THD, DC componentCopyright © 2017 Institute of Advanced Engineering and Science. All rights reserved. IntroductionTo overcome the limitations of traditional multilevel inverter, in this paper Z-source multilevel inverter is proposed. It comprised by Z-source network and multilevel inverter topology. Multilevel inverter has a unique structure they are specially suited for applications which need low THD. Multilevel inverter is a power electronic device built to synthesize a desired AC output voltage from several DC voltage sources. Multilevel inverter not only can generate the output voltage with very low distortion, but also can reduces the the Electromagnetic Compatibility Problems (EMC). Proper selection of pulses in the Z-source MLI can limit the THD in the output voltage.Cascaded multilevel inverters have been developed for electric utility applications. This paper provides features and control schems of the cascaded multilevel inverter for utility applications including renewable energy, VAR compensation, voltage regulation and harmonic filtering in power systems [1]. The Z source inverter can overcome the limitations of both VSI and CSI. It reduces line harmonics, improves power factor and high reliability [2]. The method of triangular carrier switching control of two level inverters is extended for the cascaded multilevel inverter controlled systems [3]. This paper presents a survey of different topologies, control strategies and modulation techniques of cascaded multilevel inverter [4]. The performance of Zsource multilevel inverter have been analysed and simulation results are presented using MATLAB/SIMULINK. The output voltage can be boosted with Z-network shoot through state control [5].Z-source seven level diode clamped inverter for photovoltaic applications have been presented. Higher output voltage is obtained through its Z-source network [6]. The system configuration and operating principle of voltage source inverter fed STATCOM system have been presented [7]. The performance of the multilevel inverter controlled by using the embedded controller.These proposed topologies producing the high quality output which is nearer to the sinusoidal waves [8].The proposed cascaded multilevel inverter is controlled by using digital and embedded controller. It used to reduce the total harmonic distortion (THD) in the output voltage [9]. To boost the voltage there are many maximum power points tracking (MPPT) methods are introduced [10]. To overcome the limitations of conventional Z-source inverter, the performance analysis of Z-source multilevel inverter have been presented using three level NPC inverter [11]. Isolated and non-isolated dc-power suppl...

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Switching Characterization of Cascaded Multilevel-Inverter-Controlled Systems

Cited by 150 publications

References 18 publications

Voltage Source Equipment for the Grid Fault Testing and Analysis of Total Harmonic Distortion According to PWM Methods

Voltage Source Equipment for the Grid Fault Testing and Analysis of Total Harmonic Distortion According to PWM Methods

Modular Multilevel Converter Based STATCOM Topology Suitable for Medium-Voltage Unbalanced Systems

Z–Source Multilevel Inverter Based on Embedded Controller

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