基于FEM的双馈发电机定子匝间短路表征因子研究  

Research on Characteristic Factor of Inter-Turn Short Circuit Faults of Stator Winding for DFIG Based on FEM

作　　者：何水龙[1] 沈徐红 蒋占四[1] 王衍学[1] HE Shuilong;SHEN Xuhong;JIANG Zhansi;WANG Yanxue(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学机电工程学院,广西桂林541004

出　　处：《电机与控制应用》2018年第7期109-115,共7页Electric machines & control application

基　　金：国家自然科学基金项目(51565008);广西教育厅科研项目(2017KY0207);广西制造系统与先进制造技术重点实验室主任基金项目(16-380-12-004Z;16-380-12-011K);广西高校高水平创新团队及卓越学者计划

摘　　要：为了研究电机定子匝间短路故障时电磁特性的表征,基于Ansys Maxwell建立双馈发电机有限元模型,实现空载、并网和不同程度定子绕组匝间短路故障3种工况的模拟仿真。根据表征量理论计算方程式,基于能量角度定量分析3种工况下的气隙磁密畸变的振动、电流和温度特性。通过对比各表征量优缺点及诊断可行性分析,最终确定电流作为反映定子绕组匝间短路故障时气隙磁场的表征因子,而振动和温度作为故障检测的补充和验证,为发电机故障诊断的信号特征选择提供了理论基础。In order to study the electromagnetic properties of double fed induction wind generator（ DFIG） with the ITSCFSW,a finite element model based on Ansys Maxwell was established. Then the simulations under three operations conditions such as no-load operation conditions,grid-connected operation and varying degrees of the stator winding inter-turn short circuit fault were completed. According to theoretical formulas of characterization,quantitative analysis of vibration,current and temperature characterization of air gap flux density distortion in three working conditions was done based on energy perspective. Finally,the advantages and disadvantages of each characterization were compared,and the feasibility analysis of diagnosis was carried out. The stator current was determined as the characteristic factor to reflect the air gap magnetic field of the ITSCFSW,and the vibration and temperature were complement and verification for fault detection,which would provide a theoretical basis for the signal feature selection of generator＇s fault diagnosis.

关 键 词：定子匝间短路 双馈风力发电机 磁密 表征因子 

分 类 号：TM315[电气工程—电机]