基于多回路理论的发电机转子绕组匝间短路故障特征分析  

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

作　　者：高磊[1] 李永刚[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电力科学与工程》2010年第12期15-19,共5页Electric Power Science and Engineering

摘　　要：发电机发生转子绕组匝间短路故障后,会造成励磁电流增大,输出无功功率减小。但到现在为止,对此故障特征的分析主要通过实验检测和定性分析,因为不能准确计算出故障电流等电气量,在实际应用中还存在很大的局限性。针对SDF-9型故障模拟实验机组,采用多回路模型对不同匝数的转子绕组匝间短路故障进行数字仿真并对故障电气量进行定量计算,通过实验验证所建立多回路模型的准确性,因而,可利用此模型准确计算转子绕组匝间短路不同短路匝数对应的励磁电流和无功的大小,从而为转子绕组匝间短路故障的保护提供依据。The exciting current is increasing,the reactive power output is decreasing relatively after inter-turn short-circuit fault on generator rotor windings.Up to now,the analysis of the characteristic is mainly qualitative,the characteristic cannot be calculated accurately,which are subject to practical limitations.The simulation for the inter-turn short-circuit of rotor winding on SDF-9 fault simulation experiment unit is carried out by multi-loop methods and the electrical parameters are calculated quantitatively,and the experimental result coincides with the calculated one.So the value of the exciting current and reactive power output for different short-circuit turns of rotor winding can be calculated accurately,which may serve as the basis for the protection against inter-turn short circuit faults of rotor windings.

关 键 词：发电机 转子绕组 匝间短路 多回路模型 

分 类 号：TM311[电气工程—电机]