摘要
分析三电平逆变器并网运行时的电流瞬态过程,求得纹波电流的最大脉动。分析了LCL滤波器的滤波原理,证明在相同的滤波效果下,LCL滤波器的总电感约为L滤波器电感的1/3。根据功率条件和纹波抑制要求,确定L型滤波器的电感量,从而确定LCL型滤波器的总电感。在满足滤波要求前提下,使桥臂电流谐波含量尽可能低,从而确定电感比和滤波电容。仿真和实验证明了所提设计方法的可行性。
The maximum ripple current is given through analysis of the current transient process.The principle of LCL filter is analyzed,and it is proved that the inductance of LCL filter is equal to one third of that of L filter in the situation of the same effect.According to power condition and ripple rejection,inductance of L filter is determined,so as to inductance of LCL filter.While satisfying the filter effect,converter current harmonic is reduced as low as possible to determine inductance ratio and capacitance.The simulation and experiment testify this design scheme is feasible.
出处
《电力电子技术》
CSCD
北大核心
2010年第11期36-38,共3页
Power Electronics
关键词
三电平逆变器
滤波器
电感比
电流谐波
three level converter
filter
inductance ratio
current harmonic
