摘要
从电压传递函数增益的频率响应的角度 ,分析了 LC输出滤波器对混合有源滤波系统 H APF的影响 ,说明 LC输出滤波器串联电感减小使得电网电流低频谐波减小是由于增大了抵消负载特征谐波的低频注入电流 ,而电网电流中高频谐波分量的增加是由于个别频率附近的谐波被输出滤波器过度放大而造成的。并且提出采用 LCR输出滤波器来减小电压传递函数增益的峰值 ,从而在串联电感较小时能够同时减小电网电流中高频毛刺的含量。通过实验结果的比较 ,说明 L CR输出滤波器比
From the point of frequency response of voltage transfer function,the effect of LC output filter on HAPF (Hybrid Active Power Filter) is analyzed in this paper. The increased low frequency harmonic current injected by HAPF which counteract m ore characteristic harmonic current produced by nonlinear load can decrease the source current at corresponding frequency.Some harmonic in HAPF current excessiv ely magnified by LC output filter can augment the corresponding harmonic in sour ce current.It is proposed that LCR output filter can decrease the peak value of the gain of voltage transfer function as well as the high frequency burr contain ed in the source current.The preliminary experiments show that the performance o f HAPF is greatly improved when LCR output filter is introduced.
出处
《电力系统及其自动化学报》
CSCD
2003年第5期54-58,共5页
Proceedings of the CSU-EPSA
基金
国家科技攻关计划引导项目 (2 0 0 2BA2 18C)
