[关键词]
[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。
[Key word]
[Abstract]
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 noload operation conditions, gridconnected operation and varying degrees of the stator winding interturn 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.
[中图分类号]
TM 315
[基金项目]
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(1638012004Z,1638012011K);广西高校高水平创新团队及卓越学者计划