六相无刷励磁系统的电枢电流谐波分析研究  

Analysis of armature harmonic current for six-phase brushless excitation system

作　　者：程琳[1,2] 姚方方 谢驰[3] 张雅雯 邬舒群[4] 钱文[5] CHENG Lin;YAO Fangfang;XIE Chi;ZHANG Yawen;WU Shuqun;QIAN Wen(Anhui Electrical Engineering Professional Technique College,Hefei 230051,China;State Grid Anhui Training Center,Hefei 230022,China;Jincheng College Sichuan University,Chengdu 611731,China;Hefei College of Finance&Conomics,Hefei 230601,China;State Grid Anhui Bozhou Power Supply Company,Bozhou 236800,China)

机构地区：[1]安徽电气工程职业技术学院,安徽合肥230051 [2]国网安徽省电力有限公司培训中心,安徽合肥230022 [3]四川大学锦城学院,四川成都611731 [4]合肥财经职业学院,安徽合肥230601 [5]国网安徽省电力有限公司亳州供电公司,安徽亳州236800

出　　处：《中国测试》2018年第7期121-123,131,共4页China Measurement & Test

基　　金：国网安徽省电力有限公司培训中心科技项目(2016QC06)

摘　　要：无刷励磁同步发电机主要由同步发电机、交流励磁机和旋转整流器同轴组装,交流励磁机电枢电流无需电刷传导。交流励磁机是无刷同步发电机励磁系统的主要部分,旋转整流器是无刷同步发电机的关键部件。在大容量无刷同步发电机运行时,无刷励磁系统的旋转整流器随同发电机转子一起旋转,旋转整流器在强离心力作用下会出现故障。该文针对六相无刷励磁系统的旋转整流器在正常运行和一臂开路故障情况时的电枢电流进行谐波分析,并与三相无刷励磁系统进行比较,获取六相无刷励磁系统的故障特征,为大容量无刷同步发电机的旋转整流器故障诊断提供一定的理论依据。Brushless excitation synchronous generator is mainly composed of synchronous generator,AC exciter and rotary rectifier coaxially,and AC exciter armature current does not need to be conducted by the brush.AC exciter is the main part of brushless synchronous generator excitation system and the rotary rectifier is the key component of brushless synchronous generator.When large-capacity brushless synchronous generator is operating,rotating rectifier of brushless excitation system rotates with the generator rotor together,and the rotating rectifier is faulted under a strong centrifugal force.Based on the harmonic analysis for armature current of rotating rectifier of six-phase brushless excitation system in normal operation and one arm open circuit fault and comparison with the three-phase brushless excitation system,fault characteristics of the six phase brushless excitation system are obtained,which can provide theoretical basis for fault diagnosis of rotating rectifier of large-capacity brushless synchronous generator.

关 键 词：无刷励磁系统 旋转整流器 谐波分析 故障特征 

分 类 号：TM31[电气工程—电机]