隐极发电机转子匝间短路时转子不平衡磁拉力的解析计算模型  

Analytic calculation model of unbalanced rotor magnetic pull for non-salient pole generator with rotor inter-turn short circuit

作　　者：张广韬[1] 吴俊勇[1] 李扬[1] 郝亮亮[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《电力自动化设备》2016年第8期129-136,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51307005);中央高校基本科研业务费专项资金资助项目(KEJB15016536;2015YJS149;KERC14003536)~~

摘　　要：采用多回路法计算发生转子匝间短路故障时隐极发电机的定、转子电流,基于计算结果,按照发生转子匝间短路故障时电机各回路的实际构成方式,对故障时的气隙磁场进行了分析,得出气隙磁动势和磁密的计算模型;通过求解Maxwell应力的积分,得到转子不平衡磁拉力。对一台1对极隐极模拟样机进行转子匝间短路实验,实验结果验证了计算模型的正确性;将所提计算模型得到的结果与ANSYS仿真结果进行对比,结果证明所提计算模型具有耗时短、效率高的优点。The multi-loop method is applied to calculate the stator current and rotor current of non-salient pole generator with rotor inter-turn short circuit,based on which,the air-gap magnetic field during the fault is analyzed according to the actual formation of generator loops and the calculation model of air-gap magnetomotive force and flux density is deduced. The rotor unbalanced magnetic pull is obtained by solving the Maxwell stress integral. The rotor inter-turn short circuit test is carried out for a prototype generator with one pair of non-salient poles and the results show the correctness of the proposed calculation model. The results calculated by the proposed model are compared with the results of ANSYS simulation,which shows that,with shorter computation time ,the proposed calculation model has higher efficiency.

关 键 词：发电机 隐极发电机 转子匝间短路 有限元模型 不平衡磁拉力 故障诊断 

分 类 号：TM31[电气工程—电机]