APF和SVC联合运行的稳定控制

研究了有源电力滤波器(APF)和静止无功补偿器(SVC)联合运行中的互相影响问题,指出在两者同时运行的情况下SVC控制器的设计要考虑到APF的影响,否则系统可能会不稳定。通过分析APF对SVC的影响途径,指出APF采用通常的Ip-Iq检测方法时,与SVC的耦合程度大;而采用“补偿特定次数谐波”方法时,与SVC的耦合程度小,此时APF是否投入对系统的稳定性基本没有影响,因此提高了系统可靠性。

Stability Control of a Combined System of APF and SVC

The interaction between active power filter (APF) and static var compensator (SVC) is analyzed. When SVC and APF work simultaneously, the system may run into oscillation if the design of SVC controller does not consider the influence of APF. By analyzing how APF affects SVC, it is found that the coupling between APF and SVC is strong when using the conventional Ip-Iq method, but it becomes weak when using the selective harmonic compensation method. It is concluded that the system stability is improved when using the selective harmonic compensation method.