摘要
由于大功率逆变器中硬件电路存在差异性,同时滤波电感和并机电抗又比较小,致使逆变器空载并联环流很大,较大的并联环流会导致母线电压过高甚至并联失败。此处分析并联系统中逆变器产生环流的原理,提出加入直流分量调节控制方法,采用改进的方法后并机环流明显减小,同时用两台10 kW逆变器进行并联实验,实验结果证明了此方法的有效性和可行性。
Due to the differences of hardware circuit in large power inverter,and filter inductance and parallel reac- tance are small relatively ,which make the inverter parallel produce large circulation current without load,the large circulation current can lead to bus voltage too high and parallel failure.This paper analyzes generation principle of parallel system inverter circulation current,and gives a method of DC bias regulation control.Using the improved method,the circulation current of parallel will be obvious reduced.Meanwhile,two 10 kW inverters are parallelled used to do experiment, effectiveness and feasibility of control method are verified by the experimental results.
出处
《电力电子技术》
CSCD
北大核心
2013年第8期94-95,共2页
Power Electronics
关键词
逆变器
并联系统
直流分量
环流
inverter
parallel system
direct current bias
circulation current
