基于有效零矢量脉宽调制和PR控制的并联零序环流抑制

LI Kai

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基于有效零矢量脉宽调制和PR控制的并联零序环流抑制

更新时间：2025-08-13

- 基于有效零矢量脉宽调制和PR控制的并联零序环流抑制
- Automation of Electric Power Systems Vol. 39, Issue 15, Pages: 126-131(2015)
- 作者机构：
  
  电子科技大学自动化工程学院,四川省,成都市,611731
- 作者简介：
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- Published：2015
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LI Kai. [J]. Automation of electric power systems, 2015, 39(15): 126-131.
DOI：

LI Kai. [J]. Automation of electric power systems, 2015, 39(15): 126-131. DOI：

摘要

共直流母线的逆变器的并联会产生零序环流

导致逆变器三相电流不平衡、输出电流失真、系统损耗增加等问题。针对逆变器的并联零序环流问题

文中基于逆变器并联的零序环流等效模型

分析了逆变器的并联零序环流产生机理、组成成分。在上述基础上

研究了一种基于有效零矢量脉宽调制和比例-谐振(PR)控制的逆变器并联零序环流控制策略

该策略通过利用非零矢量来替换零矢量

以减少高频零序环流

通过采用PR控制的零序电流闭环控制以抑制低频零序环流。该策略具有直流电压利用率高、零序环流小的优点。实验结果验证了所述方法的有效性。

Abstract

Parallel operating inverters with common direct current (DC) power supply can generate zero-sequence circulating current leading to unbalanced load current

output current distortion

system loss increase and so on. To suppress zero-sequence circulating current

an analysis is made of the mechanism and components of zero-sequence circulating current based on its equivalent model first. Then

a new strategy based on the active zero state pulse width modulation (AZSPWM) and proportional-resonant (PR) control is proposed

which uses two opposite active vectors instead of zero vectors to suppress the higher frequency circulating current and reduces the lower frequency circulating current by means of zero-sequence circulating current closed-loop control based on the PR controller. It is able to eliminate circulating current with high-efficiency usage of DC voltage and without increasing the hardware cost. Finally

the effectiveness of the strategy between two parallel inverters is verified on an experimental platform. This work is supported by National Natural Science Foundation of China (No. 61201010) and National High Technology Research and Development Program of China (863 Program) (No. 2013AA051002).

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