Research on Leakage Current Filtering Method of Low Voltage Distribution Network Based on IoT

In the low-voltage distribution network of the Internet of Things, leakage current detection is developed rapidly. But the accuracy of leakage detection is decreased due to the zero-sequence harmonics caused by the nonlinear load in the wireless region. A single-phase d-q transforming filtering method is proposed to effectively reduce the interference of zero-sequence harmonics in the radio zone circuit for detecting leakage current. The proposed method can deal with the detection of instantaneous leakage current of the line comparing with the frequency domain filtering method. Based on the Internet of Things technology, the leakage current collection and data analysis are realized, the fault point is accurately located and the fault is eliminated in time. The feasibility of the method is verified by MATLAB/SIMULINK.