核电多相星形无刷励磁机定子励磁绕组匝间短路故障特征分析  

Characteristic analysis of inter-turn short circuit fault of stator excitation winding in nuclear power multi-phase star brushless exciter

作　　者：郝亮亮[1] 曹磊 熊国都 王晓明 段贤稳 汪南华 屈天龙 何鹏 HAO Liangliang;CAO Lei;XIONG Guodu;WANG Xiaoming;DUAN Xianwen;WANG Nanhua;QU Tianlong;HE Peng(School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;Yangjiang Nuclear Power Co.,Ltd.,Yangjiang 529500,China;Fujian Ningde Nuclear Power Co.,Ltd.,Ningde 352100,China;China Nuclear Power Operation Co.,Ltd.,Shenzhen 518172,China;Guangxi Fangchenggang Nuclear Power Co.,Ltd.,Fangchenggang 538000,China;Daya Bay Nuclear Power Operations and Management Co.,Ltd.,Shenzhen 518124,China;Liaoning Hongyanhe Nuclear Power Co.,Ltd.,Dalian 116001,China)

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]阳江核电有限公司,广东阳江529500 [3]福建宁德核电有限公司,福建宁德352100 [4]中广核核电运营有限公司,广东深圳518172 [5]广西防城港核电有限公司,广西防城港538000 [6]大亚湾核电运营管理有限责任公司,广东深圳518124 [7]辽宁红沿河核电有限公司,辽宁大连116001

出　　处：《电力自动化设备》2021年第8期175-182,共8页Electric Power Automation Equipment

基　　金：中国广核集团有限公司科技项目(百万千瓦级核电机组无刷励磁机故障特征分析和继电保护配置研究及实施)。

摘　　要：相比于常规的三相绕组,多相星形电枢绕组的联接方式更为复杂灵活。以3n(n=2,3,…)相P对极的星形无刷励磁机为研究对象,从定、转子间磁势的性质及其相互作用入手,通过理论推导得出在定子励磁绕组中感应出的谐波电流特性。以某6相星形励磁机为例,依据每相各分支绕组相对空间位置、三相绕组相对空间位置分析定子励磁绕组匝间短路故障的特征。理论分析与仿真结果均表明,6相星形无刷励磁机正常运行时励磁电流中主要含有直流分量与6倍次谐波分量,当发生定子励磁绕组匝间短路故障后,励磁电流中还会出现3/4及其倍数次特征谐波电流。Compared with the conventional three-phase windings,the connection mode of multi-phase star armature windings is more complex and flexible.Taking the general 3n-phase(n=2,3,…)P-pair-pole star brushless exciter as the research object,the characteristics of harmonic current induced in stator excitation winding are theoretically analyzed based on the magnetic field produced by stator and rotor windings and their mutual induction.Taking a 6-phase star brushless exciter as an example,the characteristics of inter-turn short circuit fault of stator excitation winding are analyzed according to the relative space position of each branch winding of each phase and the relative space position of three-phase winding.Both the theo⁃retical analysis and simulative results show that the excitation current of the 6-phase star brushless exciter mainly contains DC component and 6 times harmonic component during normal operation,and another 3/4 and its multiples harmonic component appears after inter-turn short circuit fault of stator excitation winding occurs.

关 键 词：多相星形电枢绕组 无刷励磁机 励磁绕组匝间短路故障 谐波分析 

分 类 号：TM301[电气工程—电机]