三相四开关有源电力滤波器的容错控制技术

设计了基于dq电流谐波检测法、电流矢量轨迹斜率故障诊断法以及模糊自适应PR控制的容错型有源电力滤波器,并提出了利用电压差值前馈补偿方法消除直流母线中点电位偏移。搭建了容错型三相四开关有源电力滤波器的整体模型和实验平台,研究其在故障发生前、故障发生后以故障状态运行与故障发生后以拓扑重构状态运行时对谐波的补偿性能。结果表明,所设计的容错型有源电力滤波器在故障前与故障后拓扑重构运行时均有良好的谐波补偿效果。

Fault-tolerant Control Technology of the Three-phase Four-switch Active Power Filter

The fault-tolerant active power filter(APF)based on dq current harmonics detection,current vector trajectory slope method and fuzzy adaptive PR control was designed.The compensation method of voltage difference feedforward was proposed to eliminate the neutral point potential offset in DC bus.The overall model and the experimental platform of fault-tolerant three-phase four-switch active power filter were built,and the compensation performance of the harmonic when APF runs before the fault occurs,runs after the fault occurs and runs in topology reconfiguration state after the fault occurs were analyzed separately.The results show that the fault-tolerant active power filter has good harmonic compensation effect before and after the topology reconstruction operation.