副励磁机接地短路故障仿真研究

本文主要针对副励磁机接地短路故障,根据零序电压过滤器及负序电压过滤器的原理,通过SIMULINK搭建包含副励磁机(电源)、整流装置、负载的接地短路故障模型,利用接地短路时,机端将出现零序电压或者负序电压的原理,识别接地短路故障位置.仿真结果表明零序电压增大时,电流如果基本不变化,则为副励磁机本侧接地故障;电流如果变化比...

Simulation Research on Grounding Short-circuit Fault of Auxiliary Exciter

This paper mainly aims at the grounding short-circuit fault of auxiliary exciter.According to the principle of zero sequence voltage filter and negative sequence voltage filter,a grounding short-circuit fault model including auxiliary exciter(power supply),rectifier and load is built through Simulink.The location of grounding short-circuit fault is identified by using the principle that zero sequence voltage or negative sequence voltage will appear at the machine terminal during grounding short-circuit.The simulation results show that when the zero sequence voltage increases,if the current basically does not change,it is the grounding fault on the local side of the auxiliary exciter.If the current change ratio is more than 1.2 times different,it is a ground fault at the excitation side.