SVC和APF联合系统的研究

Research on a Combined System of SVC and APF

提出了静止无功补偿器(SVC)和有源电力滤波器(APF)联合运行进行无功补偿和谐波治理的方案;介绍了系统的拓扑结构、分析了系统的稳定性,指出当APF采用"只检测特定次谐波电流"的检测方法时,其与SVC的耦合程度小,系统能稳定运行。在此基础上,研究了一种适用于APF的k次谐波电流检测方法,并深入分析了SVC和APF的控制策略。样机实验结果验证了k次谐波电流检测方法和控制策略的有效性和正确性。

This paper adopts the combined system constructed by SVC and APF which can compensate reactive power and suppress harmonic currents simultaneously.The topology is presented and the system stability is analyzed.It is found that the coupling between APF and SVC becomes weak when APF uses the selective harmonic compensation method,so the system stability is improved.Based on the analysis,a detection method of k-harmonic current for APF is researched,and the control schemes for SVC and APF are deeply analyzed.A prototype is built, and the experimental results are presented to validate the effectiveness of the detection method and the control strategy.