基于多回路理论的发电机励磁绕组匝间短路故障时励磁电流谐波分析

本文分析了发生转子绕组匝间短路故障,发电机的电磁特性及励磁电流的变化,针对SDF-9型故障模拟实验机组,采用多回路模型建立了励磁绕组匝间短路故障情况下的转子电感参数模型和定转子互感参数模型。对励磁绕组匝间短路的短路匝数与励磁电流的谐波关系进行了定量计算。分析得到转子绕组匝间短路故障的特征,为故障检测提供依据。

Excitation Current Harmonics Analysis of Fault on Inter-turn Short-circuit of Rotor Windings in Generator Based on Multi-loop Theory

In this paper,the electromagnetic characteristic and the correlative variety of the electrical parameters induced after inter-turn short-circuit fault on generator rotor windings are analyzed.The rotor inductance parameter model and stator mutual-inductance parameter model for the inter-turn short-circuit of rotor winding on SDF-9 fault simulation experiment unit is carried out by multi-loop methods.The excitation current harmonics are calculated quantitatively,based on the analysis,the paper gives the characteristic of fault on inter-turn short-circuit of rotor windings,which will facilitate new approaches to fault detection.