P-Q谐波电流检测方法研究

Researches on P-Q Harmonic Current Detection Method

以瞬时无功功率理论为基础,对p-q检测方法在系统三相电压畸变、不对称状况下的检测结果进行理论分析。给出了电流检测的误差来源;同时提出了系统电压基波正、负序分离新方法,对传统p-q检测方法进行改进,消除了电压畸变、不对称电流检测误差。

The theoretical analysis of the test results is given based on p-q detection method in the system three-phase voltage distortion and a- symmetry. System voltage fundamental positive and negative sequence separation module is proposed based on traditional p-q detection method, which have solved the voltage distortion, asymmetry detection error, that is to say, voltage distortion and asymmetrical would not affect the fundamental positive and negative sequence current detection.