基于李萨如曲线分析的电流互感器匝间短路在线诊断方法OA

Interturn short circuits in the secondary winding are among the most common faults in current transformers(TA).This fault will seriously affect the accuracy of electrical measurement and the reliability of relay protection operation.It analyzes the action mechanism of TA and the causes of interturn short circuit faults,proposes and an online diagnosis method for interturn short circuit faults of TA.The approach utilizes real signals from the primary winding and output signals from the secondary winding to construct Lissajous curves,which reflect the operational status of the transformer through their variations.Simulation results demonstrate that the proposed method can effectively and sensitively diagnose interturn short circuit faults in TA,highlighting its practical significance.