基于无源动态滤波器和 TSC 的无功补偿滤波仿真

摘要

In order to eliminate the harmonic and compensate the reactive power in power grid, the double-tuned filter based on double-controlled reactor combined with TSC ( thyristor-switched capacitor) is proposed.Two fixed reactors in tradition-al passive filter are replaced by two variable reactors, thus a passive dynamic filter is formed which improves the disadvantages that the traditional passive filter is easy to detune affected by the parameters.TSC can fast track and compensate the reactive power in power grid, and has the advantages of not producing harmonic.The simulation proves that the mistuning of double-tuned filter which is caused by the change of two capacitances can be corrected by changing the values of two reactors.And the simulation verifies the effectiveness of the filter to eliminate the harmonic and compensate the reactive power, thereby impro-ving the power quality by paralleled with TSC.%为达到消除电网谐波及无功补偿的目的，提出了基于双可控电抗器的双调谐滤波器与TSC （晶闸管投切电容器）相结合的方法，传统无源滤波器中的两个固定电抗器用两个可变电抗器替代，构成了无源动态滤波器，改善了传统无源滤波器易受参数影响而失谐的缺点；TSC能够快速跟踪补偿电网中的无功功率，并且具有不产生谐波等优势。通过仿真证明了可通过调节两电抗器值来纠正双调谐滤波器因两个电容值改变引起的失谐；并仿真验证了滤波器在消除谐波的同时有无功补偿的作用，从而与TSC并联结合来提高电能质量。