面向智能变电站二次设备的故障诊断方法研究

Research on fault diagnosis method for secondary equipment of intelligent substation

针对智能变电站二次设备检修和故障隔离工作的高安全风险,通过对智能变电站二次设备故障状态的分析,提出了一种智能变电站故障诊断新方法用于继电保护测量回路。在变压器阻抗测量的基础上,利用广义变比建立了故障诊断模型,对极性故障进行分析。并通过仿真对该方法的有效性进行验证。结果表明,该方法可以很好地评估电流电压测量回路的故障状况。该研究为智能变电站设备故障诊断的发展提供了参考和借鉴。

Aiming at the high safety risk of secondary equipment maintenance and fault isolation in intelligent substation,based on the analysis of the fault state of secondary system in intelligent substation,this paper proposes a novel fault diagnosis method of relay protection measurement loop for secondary equipment in intelligent substation.Based on the measurement of transformer impedance,the fault diagnosis model is established by using the generalized transformation ratio,and the polarity fault is analyzed.The correctness and validity of the proposed method are verified by simulation.The results show that this method can evaluate the fault condition of current and voltage measurement loop very well.This study provides a reference for the development of the fault diagnosis of intelligent substation equipment in China.