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在射线型配电网末端安装动态调节增益的有源滤波器只能抑制谐波的放大现象,不能实现对谐波的有效衰减,且可能引起电压谐振。基于以上问题,提出分频动态增益调节的有源滤波器(discrete frequency automaticgain tuning active filter,DFAGTAF)最优安装位置的谐波衰减方案,得出在距谐波源最近的各次谐波的谐振峰值处为DFAGTAF的最优安装位置。该方案不仅可对有源滤波器安装点谐波进行有效衰减,同时对线路其他位置也能实现良好的谐波衰减效果,且对配电线参数的改变以及非线性负载的切入具有较强的鲁棒性。仿真和实验结果均验证了该方案的正确性和有效性。
An active filter with dynamically adjusted gain at the end of the radial distribution network can only suppress harmonic amplification, fail to achieve effective attenuation of harmonics, and can cause voltage resonance. Based on the above problems, a harmonic attenuation scheme is proposed for the optimal installation position of the active frequency-divider active gain (DFAGTAF) active-frequency-divider filter. It is found that the harmonics of the harmonics closest to the harmonic source Peak at DFAGTAF optimal installation location. The scheme not only can effectively attenuate the harmonic of the active filter installation point, but also can achieve good harmonic attenuation effect at other positions of the line, and has strong effect on the change of the distribution line parameters and the non-linear load cut-in Robustness. Simulation and experimental results verify the correctness and effectiveness of the scheme.