逆变器并联系统环流抑制的研究  

Researches on circulating-current restraining in parallel inverter system

作　　者：杨富松 陈皓[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《电源技术》2015年第10期2244-2246,共3页Chinese Journal of Power Sources

摘　　要：在SVPWM调制过程中,零矢量的作用会引起实际电压矢量与理想电压矢量之间相角的偏差,从而导致逆变器输出侧存在电压谐波,对于输出电压精度有一定的影响。而在逆变器并联系统中,较小的输出电压相角误差能够引起较大的有功环流,因此要尽量减小零矢量作用效果从而减少环流。首先探讨了零矢量作用对SVPWM调制的影响,然后分析了均分零矢量的法对逆变器并联系统有功环流抑制作用,仿真证明此方法输出谐波更小,对逆变器并联系统的有功环流有一定的抑制效果。The deviation between the actual vector and the reference vector was caused by the null vector＇s participation, when adopting the SVPWM. Not only the harmonic was brought to the output voltage, but also massive active power circulating current was created in the parallel inverter system. It was crucial to diminish the effect of null vector. After analyzing the effect of null vector in SVPWM, the effect of null vector on active power circulating current was told about, then a method that divides the action time of null vector equally was given so as to diminish the deviation between the actual vector and the reference vector. The simulation results show that the proposed method is effective in the parallel operation system.

关 键 词：逆变器并联 谐波 空间矢量脉宽调制 零矢量 环流 

分 类 号：TM464[电气工程—电器]