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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。但这一方法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，反变换后来得谐波。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力滤波器的样机设计。样机实验结果验证了设计方案的可行性和正确性。
The ip-iq detection method based on instantaneous power theory has good real-time performance and has been successfully applied in hybrid power filters. But this method is to transform the three-phase instantaneous current to α-β two-phase orthogonal coordinates of the operation, the inverse transform was harmonics. The three-phase approach to deal with as a whole, so the adjustment is more difficult, but also sensitive to component parameters. In this paper, an adaptive harmonic detection circuit is designed based on the interference cancellation principle. The prototype design of the hybrid power filter with this detection circuit is introduced. The prototype experimental results verify the feasibility and correctness of the design scheme.