LCL输出滤波器参数变化对D-STATCOM补偿特性的影响

Influence of LCL Output Filter Parameter Changing on D-STATCOM Compensation Characteristics

针对D-STATCOM动态补偿装置输出的补偿电流中含有大量的开关纹波等问题,设计LCL输出滤波器以滤除纹波。重点研究LCL输出滤波器各元件参数对滤波器特性的影响,综合考虑D-STATCOM无功补偿容量、补偿电流开关纹波、电网THD、电阻功耗等因素,提出了一种LCL输出滤波器的综合设计方法,并就LCL输出滤波器对D-STATCOM补偿特性的影响进行了仿真研究。结果表明:采用该方法设计的输出滤波器对高频开关纹波有很好的抑制效果,可有效改善D-STATCOM的补偿性能。

Aim at the problem of D-STATCOM output containing plenty of switching tipple, LCL filter was designed. Influence of LCL filter parameters on the compensation characteristic of D-STATCOM was studied. Considering the compensation capacity of the D-STATCOM, the compensation current switch ripple, the grid THD, the resistance loss and the other factors, a method of designing LCL filter was presented, and the compensation characteristic of the D-STATCOM with the LCL filter was researched with simulation. The results proved that the output filter designed in this method had very good inhibitory effect on high-frequency switch tipple, and greatly improved the compensation performance of the D-STATCOM.