农村电网中电流平均值谐波检测法特性分析

Analysis on the Character of the Harmonic Current Average Detection Method about Rural Power Network

在瞬时无功功率理论的基础上,对农村电网的三相和单相电流的谐波成分进行了分析,同时对平均值谐波检测方法(又称积分法)的实时特性进行了分析。结果表明:三相对称电路在一定的情况下,谐波检测实时特性可以达到T/6,而单相电流中的谐波检测实时特性最多可以达T/2。通过Simulink仿真也表明,平均值谐波检测法具有较好的响应速度,检测结果准确,有较好的应用性。

Based on the instantaneous reactive power theory,compared with the harmonic current in single-phase circuit about rurall power network,by analyzing the real-time character of the harmonic current average detection method （integral method）,the real-time character of the average current in three-phase circuit can reach T/6,while only T/2 in single-phase circuit at most. The same value has also been obtained in simulink simulation. It is agreed that the detection value is accurate and the respond speed is fast with current average method.