With the development of power electronics, nonlinear load is widely used in power system, which brings about serious pollution and unsafe operation for power grid. The UPQC (Unified Power Quality Controller) contains volrage compensator, current compensator and energy storage device. On analyzing the APF detecting method, the detection method based on symmetric component method and generalized instantaneous power theory is deduced. In detection method, the voltage compensation detection result can be applied in the current compensation detectio. It ensures that reference current phase is accordance with positive fundamental voltages phase. Simulation results verify the correctness and feasibility of the detection method.%利用统一电能质量控制器解决了多重电压、电流质量问题的特性及需求.在研究有源滤波器检测方法的基础上,从理论上推导出一种基于对称分量法和瞬时功率理论的统一电能质量控制器电压电流检测方法.该检测方法将电压补偿量检测的结果直接应用与电流补偿量的检测中,保证了参考电流与基波正序电压相位的一致,具有较好的补偿效果.经过建模仿真研究,理论分析与仿真结果验证该方法的有效性和可行性.
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