A simplified and unified space vector PWM algorithm for multi-level diode clamped VSI

Piao, Chengzhu; Hung, John Y.

doi:10.1109/icit.2015.7125506

Cited by 7 publications

(6 citation statements)

References 9 publications

(6 reference statements)

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“…The reference vector location in SVPWM is equivalent to the identification of the NTVs. According to Piao and Hung [14], the degree coordinate can be transformed to 60° coordinate by (1) and (2):…”

Section: Review Of 60° Coordinate Transformation Methods and Svd Propementioning

confidence: 99%

“…where int(x) is a function that returns the largest integer no bigger than x. Supposing that the modulation triangle has been identified, and then space vectors can be retransformed from 60° coordinate to 120° coordinate by (5) as noted in [14]:…”

Section: Review Of 60° Coordinate Transformation Methods and Svd Propementioning

confidence: 99%

V_{i} = N \cdot m_{i} false(i = a, b, c false)

(][, \begin{matrix} 1em4pt \\ V_{g} \\ V_{h} \end{matrix}) = (][, \begin{matrix} 1em4pt \\ 1 & - 1 & 0 \\ 0 & 1 & - 1 \end{matrix}) (][, \begin{matrix} 1em4pt \\ V_{a} \\ V_{b} \\ V_{c} \end{matrix})

where

m_{i} false(i = a, b, c false)

, N ,

V_{i} false(i = a, b, c false)

and

V_{j} false(j = g, h false)

are three‐phase modulation waves, level number of converters, phase voltage in 120° and 60° coordinates, respectively. Taking the five‐level converter, for example, part of 60° coordinates is depicted in Fig.…”

Section: Review Of 60° Coordinate Transformation Methods and Svd Promentioning

confidence: 99%

“…However, due to the existence of redundant space vectors and switching sequences, its implementation procedure is rather complex, especially for multilevel converters. For the purpose of simplifying this procedure, various methods have been put forward [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…The SPWM equivalence method [13][14][15][16][17] uses SPWM to achieve SVPWM by adding a common mode voltage to the modulation waves. However, for different modulation modes (including continuous and discontinuous modulation) and different switching sequences, the different common mode voltages are required.…”

Section: Introductionmentioning

confidence: 99%

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Fast and simple space vector modulation method for multilevel converters

Zhang

Meng

Ning

et al. 2020

IET Power Electronics

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This study proposes a simplified space vector pulse-width modulation (SVPWM) method for multilevel converters. To avoid unnecessary coordination transformations, firstly, a further derivation is conducted on the basis of the 60° coordinate transformation. Then, all the nearest three vectors (NTVs), duty cycles and optimal switching sequence within one switching period can be identified through a simple comparison of three-phase modulation waves. To further reduce the switching frequency, detailed steps to achieve the minimum number of transitions among different NTVs are constructed. Combined with the optimal switching sequence within one switching period, the minimum number of transitions within a fundamental period can be achieved easily. Finally, a thorough discussion is conducted to simplify the procedure further and the flowchart for the proposed SVPWM is also presented. Compared with the previous methods, the proposed method does not require any iterative calculation or coordinate transformation. To the best of the authors' knowledge, the calculation amount is reduced by almost seven times compared with the methods proposed. In addition, the switching frequency and total harmonic distortions remain at the same level without any deterioration. Finally, the simulation and experiment for modular multilevel converter are performed to verify the correctness and efficiency of the proposed method.

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Section: Review Of 60° Coordinate Transformation Methods and Svd Propementioning

confidence: 99%

Section: Review Of 60° Coordinate Transformation Methods and Svd Propementioning

confidence: 99%