A fast and flexible nearest-level-equivalent space vector modulation algorithm for three-phase multilevel converters

Lin, Hongjian; Li, Ruoyu; Zhu, Lizhong; Yan, Han; Ma, Lan; Yao, Jiaxuan; Shu, Zeliang

doi:10.1016/j.ijepes.2019.105787

Cited by 3 publications

(4 citation statements)

References 30 publications

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“…In the proposed method, the operation in the staircase modulation mode has a simpler algorithm. Firstly, similar to the PWM mode, the two nearest level vectors to each of the reference vectors (V sαL , V sαU , V sβL , and V βU ) must be identified from Equations ( 13), (14), and (15). These four vectors create four states for the switching vectors.…”

Section: Staircase Modulationmentioning

confidence: 99%

“…A suitable modulation method has a low number of variables, simple algorithm, online implementation capability, low calculations volume, high execution speed, and less memory requirements and also results higher DC voltage utilization, lower switching losses, and acceptable harmonic spectrum for the inverter. The modulation methods proposed in literature [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] are the most attractive methods that have most of these features. In the LVPWM method also, the aim is to achieve these advantages.…”

Section: Features and Comparisonsmentioning

confidence: 99%

“…In other words, the suitable switching states at each sampling time are calculated and are not identified between predefined switching states. Most of the simplified SVPWM methods [5][6][7][8][9][10][11][15][16][17] consider all or a part of the possible switching states and corresponding space vectors and present attractive simplified methods for identifying the suitable space vectors to synthesize the reference vector from a large number of space vectors and finding the switching states corresponding to the identified space vectors using a large lookup table. For example, in the SVPWM for a seven-level CHBI, 343 switching states, 127 space vectors, and a vector diagram consisting of 216 triangles must be considered.…”

Section: Features and Comparisonsmentioning

confidence: 99%

“…Some of the simplified SVPWM methods consider the variables in a non‐orthogonal frame. SVPWM in 60° g‐h, 5,10 60° λ‐ρ, 11 120° K‐L, 4 120° a‐b‐c, 12–16 and 45° αˊβˊ 17 coordinate systems are the most effective and interesting modulation methods. The main and common aim of the SVPWM methods in the non‐orthogonal frame is the simplification of the implementation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Level vector pulse width modulation for multilevel inverters

Qanbari

Tousi

Farhadi‐Kangarlu

2023

Circuit Theory & Apps

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SummaryIn this paper, a novel method named as level vector pulse width modulation (LVPWM) is proposed for multilevel inverters. Similar to the conventional space vector pulse width modulation (SVPWM), the proposed method is a vector‐based method in the α–β frame. Unlike the SVPWM, the variables of each of the α and β axes are considered separately. Instead of space vectors, level vectors are considered for the synthesis of the reference vectors. There is no need to consider multiple switching states, vectors, and large lookup tables in the algorithm. The appropriate switching states for the synthesis of the reference vectors are determined using simple computations at each sampling time. Generality for different inverter topologies, online implementation, simplicity of the algorithm and computations, independency of the algorithm complexity from the number of switching states, and easy extension to overmodulation region are the advantages of the proposed method. Implementation of the LVPWM in different inverter topologies is studied. The validation of the proposed modulation strategy is carried out by simulation and experimental results.

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Section: Staircase Modulationmentioning

confidence: 99%

Section: Features and Comparisonsmentioning

confidence: 99%

Section: Features and Comparisonsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Level vector pulse width modulation for multilevel inverters

Qanbari

Tousi

Farhadi‐Kangarlu

2023

Circuit Theory & Apps

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Improved virtual SVPWM algorithm for CMV reduction and NPV oscillation elimination in Three-Level NPC inverter

Liu,

Zhang,

et al. 2024

International Journal of Electrical Power & Energy Systems

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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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A fast and flexible nearest-level-equivalent space vector modulation algorithm for three-phase multilevel converters

Cited by 3 publications

References 30 publications

Level vector pulse width modulation for multilevel inverters

Level vector pulse width modulation for multilevel inverters

Improved virtual SVPWM algorithm for CMV reduction and NPV oscillation elimination in Three-Level NPC inverter

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

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