基于脉冲跳变SVPWM的单相中点钳位型H桥级联逆变器开关损耗解析计算

doi:10.19595/j.cnki.1000-6753.tces.191646

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Abstract In order to optimize the performance of single-phase neutral point clamped (NPC) H-bridge cascaded inverter, the calculation method of switching loss based on pulse-shifting space vector pulse width modulation (SVPWM) voltage-sharing modulation is analyzed. To solve the problem that the effective switching frequency and control frequency are different, and the switching action is scattered and irregular, a new method based on the pulse-shifting SVPWM voltage-sharing modulation is proposed. The total switching loss calculation method directly calculates the sum of all switching transient losses. Aiming at the uncertainty of balancing voltage redundancy vector action, a maximum estimation method is proposed to estimate the switching transient losses. The simulation results show that the maximum and minimum errors of the calculated and actual switching losses are 9.55% and 1.29% respectively. The maximum errors of the experimental results and the theoretical values are less than 10%, which shows that the analytical expressions are more accurate.

Key words： Switch loss single-phase neutral point clamped (NPC) H-bridge cascaded inverter pulse-shifting space vector pulse width modulation (SVPWM) effective switching frequency

Received: 26 November 2019

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TM76

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	Articles by authors
	Yuan Jingxin
	Zhu Junjie
	Nie Ziling
	Ye Weiwei
	Jia Yingjie
	Dong Lei

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Yuan Jingxin,Zhu Junjie,Nie Ziling等. Analytical Calculation of Switching Loss of Single-Phase Neutral Point Clamped H-Bridge Cascaded Inverters Based on SVPWM[J]. Transactions of China Electrotechnical Society, 2020, 35(23): 4877-4887.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191646 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I23/4877

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