HAPF与SVC组成的并联型电能质量综合补偿器的拓扑结构及应用研究

Study of Application and Topology Structure on Shunt Power Quality Combined Compensator Based on HAPF and SVC

针对电网谐波治理和无功补偿两个关键问题,本文分析了HAPF的几种典型结构,得出串联谐振注入式混合有源滤波器HAPF和变压器副边旁路型混合有源滤波器HAPF不但可以提供一定的容性无功,而且能够对谐波电流进行治理,将之与晶闸管控制电抗器TCR并联,构成了HAPF与TCR结合的谐波电流治理与无功补偿可以同时进行的几种拓扑结构,即并联型电能质量综合补偿器.HAPF无源部分PF提供固定容性无功,而TCR提供可调感性无功,二者结合相当于典型的静止无功补偿器SVC,实现快速的无功功率补偿;对于谐波治理时,HAPF担当有源滤波器APF的功能,进行谐波抑制,由此可提高电网电能质量和功率因数.该拓扑结构降低了HAPF的容量,可以应用在中高压场合,仿真和实验结果证明了该综合补偿系统的可行性,有较高的应用价值.

According to two problems： harmonic currents and reactive power compensation of the power system, some classic type of Hybrid Active Power Filter { HAPF} are analyzed and find that the Series Res- onance Injection HAPF CSRIHAPF） and the HAPF with the Secondary of Transformer Passed by { HAPF- STP} not only can supply some capacitor reactive powerbut also can compensate the harmonic currents. Several topologies of combined harmonic currents and reactive power compensation system of HAPF with Thyristor Controlled Reactor {TCR} are proposed in this paper, which named Shunt Power Quality Com- bined Compensator （SPQCC）. The fixed capacitor reactive power is supplied by Passive Filters {PF} of HAPF, and the regulating inductive reactive power is supplied by TCR, which combined together are being used to compensate reactive power act as classic Static Vat Compensator {SVC}. When suppress harmonic currents, HAPF acts as a classic active power filter { APF} which suppress the harmonics so as to raise power quality and power factor. The rating VA of the HAPF of the SPQCC is decreased and can be used in middle and high voltage case. The feasibility of the combined system is verified by the simulation and exper- imental results, which has a good use in engineering.