Capacitor voltage balancing in neutral-point clamped rectifier using modified modulation index technique

Sharma, Deepak; Bhat, Abdul Hamid; Ahmad, Aijaz; Langer, Nitin

doi:10.1016/j.compeleceng.2018.02.031

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…In medium vector, the DC-link capacitors C1 will charge and discharge with the active current in one leg and the capacitor C2 will charge and discharge with active current in other leg. [115], [116] In large unbalance condition of DC bus capacitor, the reference vector spends more time in region 3 when compared to the time spent in region 2 and 4. Thus the effect of redundant switching state becomes prominent for longer period of time that results in quick balancing of DC bus capacitor voltages.…”

Section: Citationmentioning

confidence: 99%

A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters

2021

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The Neutral Point Clamped (NPC) Multi-Level Inverters (MLI) have been ruling the power electronics industries for the past two decades. The Multi-Carrier Pulse Width Modulation (MCPWM) is common PWM techniques which are widely used in NPC-MLI applications. However, MCPWM is not having a good impact on the balancing of DC-link voltages, Common Mode Voltage (CMV) and limiting the Total Harmonics Distortion (THD). The Selective Harmonic Elimination (SHE) technique is introduced for reducing the THD, however all the switching angles should be maintained less than π/2 to keep the eliminated harmonics at constant level which narrows down the modulation index range. Hence, in recent days Space Vector Modulation (SVM) technique is widely used in NPC-MLI, which gives better DC-link voltage balancing, self-neutral point balancing, near-zero CMV reduction, better-quality harmonics profile and switching loss minimization. Hence, it is a preferred solution for the majority of electrical conversion applications such as electric traction, high power industrial drives, renewable power generation, and gridconnected inverters, etc. The paper gives a comprehensive review of the SVM for NPC-MLI. First, this paper deliberates the state of art for two-level SVM and extends it to three-level (3L) SVM. Also compares the 3L SVM performance with other MCPWM techniques. Followed by the various modified MLI SVM techniques in terms of their implementations, DC-link capacitor balancing, and reduction of CMV. Further, the review of MLI SVM is widened to open-end winding Inverters and multiphase MLIs. The final part of this paper discussed the future trends and research directions on MLI SVM techniques and its applications.

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Section: Citationmentioning

confidence: 99%

A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters

2021

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“…When compared to conventional sinusoidal PWM, Space-Vector PWM has recently turned into an extremely well known PWM approach for these converters. This is because Space-Vector PWM provides the benefits of upgraded quality of power at a similar switching frequency and more noteworthy use of bus voltage [9][10][11][12][13][14][15]. Regardless, the issue with space-vector balance is the requirement of complicated and monotonous online estimation by a Digital Signal Processor (DSP) that for the most part limits its action up to a couple of kHz of switching frequency [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

A 3-layered feedforward back-propagation ANN-based SVPWM control for neutral point clamped converter for PV grid integration

Singh¹,

Husain²,

Minai

et al. 2023

Eng. Res. Express

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Most of the power electronic converters based on the devices such as Silicon Controlled Rectifiers (SCRs) have been broadly utilized in home, business, and modern use in recent years. Despite their many benefits, these power electronic converters have major issues such as pulling harmonic current and the reactive part of the current from the supply, as well as having a highly nonlinear characteristic. The harmonics produced by the current supplied by these nonlinear elements cause voltage distortion at the common coupling point, which is causing problems for the functioning of number of sensitive instruments and other consumer appliances. Artificial Neural Networks (ANN) are a type of Artificial Intelligence (AI) approach that has been applied to improve the efficiency and regulation of the converter. In order to avoid the need for a Digital Signal Processors (DSP) by avoiding the online timing computations for various voltage space vectors in various regions and sectors and produce higher pulse resolution, an ANN-based space vector pulse width modulation (SVPWM) technique is proposed in this paper. The analysis of a 3-layered feedforward back propagation ANN algorithm based SVPWM control for NPC converter used to integrate PV source to grid has been evaluated and found to be better as compared to traditional techniques.

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A New PWM Technique for Three-Phase Three-Level Neutral Point Clamped Rectifier

Mollahasanoglu,

Okumus

2023

Arab J Sci Eng

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Capacitor voltage balancing in neutral-point clamped rectifier using modified modulation index technique

Cited by 9 publications

References 19 publications

A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters

A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters

A 3-layered feedforward back-propagation ANN-based SVPWM control for neutral point clamped converter for PV grid integration

A New PWM Technique for Three-Phase Three-Level Neutral Point Clamped Rectifier

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