计及中性点电位均衡的VIENNA型整流器简化空间矢量调制方法
A Simplified Space Vector Modulation Method for VIENNA Rectifier Considering Equilibrium of Neutral Point Potential
郑智威 1胡嘉栋 1陆晓平1
作者信息
- 1. 国网上海市电力公司市北供电公司,上海 200072
- 折叠
摘要
当能量无需双向传递时,常规的二电平、三电平型变换器存在一定缺陷,为克服该缺陷,针对三电平三开关型VIENNA型整流器进行了工作机理以及拓扑结构分析.由于VIENNA型整流器在直流侧会产生中性点电位脉动,所以在SVPWM算法的占空比分布中引入直流母线电容的电压变化量参数,这能够改变矢量作用时间,从而实现中性点电位均衡.研究了三电平转二电平的一种SVPWM简化调制方法,并验证了所提方法的实用性和有效性.
Abstract
When energy is not transferred bidirectionally,conventional two-level and three-level converters have some defects.In order to eliminate the defects,the topology and working mechanism of the three-level,three-switch VIENNA rectifier are analyzed in this paper.Because VIENNA rectifier will produce neutral point poten-tial pulsation on the DC side,adding the voltage variation parameter of DC bus capacitor to the duty ratio distribu-tion of SVPWM algorithm can change the vector action time and realize neutral point potential equalization.Mean-while,a simplified SVPWM modulation method for three-level to two-level conversion is studied.The practical-ity and effectiveness of the method are tested and verified.
关键词
VIENNA型整流器/中性点电位均衡/简化SVPWMKey words
VIENNA rectifier/equilibrium of neutral point potential/simplified SVPWM引用本文复制引用
出版年
2024
NETL
NSTL
万方数据