基于自适应谐波检测的混合式电力滤波器的研究

基于瞬时功率理论的ｉｐ－ｉｑ检测方法具有较好的实时性，在混合式电力滤波器中得到了成功的应用。但这一方面是把三相瞬时电流变换到α－β两相正交的坐标上经过运算，反变换反求得谐波。处理方法上把三相作为一个整体来处理，因而调整比较困难，而且对元件参数敏感。本文基于干扰自适应对消原理，设计一种自适应谐波检测电路，并介绍用该检测电路构成混合式电气滤波器的样机设计。样机实验结果验证了设计方案的可行性和正确性。

Research of Combined Power Filter Based on Adaptive Harmonic Current Detecting

The ip-iq detecting method based on instantaneous inactive power theory has been applied success fully in combined power filter because of its good real-time character. By converting three-phase instantaneous currents to orthogonal two-phase currents,computering and transversing, the method can get harmonic currents. Because three-phase currents are processed as a integrity,its regulation is difficult and sensitive to the parameter of devices. This paper based on disturbance self-adaptive counteracting theory designs a adaptive harmonic current detecting circuit,and introduces the design of sample-machine of combined power filter including the detecting circuit. The experiment results of sample machine verify the design is correct.