电力系统自动化2011，Vol.35Issue(16)：59-65,7.
同步发电机励磁绕组匝间短路时的电磁转矩
Electromagnetic Torque of Synchronous Generator with Inter-turn Short Circuit in the Field Winding
摘要
Abstract
The inter-turn short circuit of field winding in synchronous generator may cause mechanical vibration,and the study of the electromagnetic torque during the fault will set the foundation for characteristics analysis on the mechanical vibration.The electromagnetic torque in case of field winding short circuits is calculated based on multi-loop mathematical model.In the calculation,the complex interactions of different kinds of components of air-gap magnetic fields,including the space fundamental and harmonics,produced by stator and rotor windings and rotating in different directions with various speed,are taken into consideration.Then the experiments on a 12 kW synchronous generator with three pairs of non-salient pole are carried out,and the results are consistent with the calculation.Furthermore,theoretical analysis on the electromagnetic torque characteristics is made,according to the harmonic characteristics of the stator and rotor fault currents as well as the magnetic fields excited by all the currents.The paper provides some insight into the influence of the inter-turn short circuits of field windings upon the electromagnetic torque,and it also offers a basis for utilizing mechanical vibration characteristics in fault monitoring.关键词
同步发电机/励磁绕组匝间短路/电磁转矩/多回路模型/磁动势/谐波Key words
synchronous generator/inter-turn short circuit of the field winding/electromagnetic torque/multi-loop model/magnetomotive force/harmonics分类
信息技术与安全科学引用本文复制引用
郝亮亮,孙宇光,邱阿瑞,王祥珩..同步发电机励磁绕组匝间短路时的电磁转矩[J].电力系统自动化,2011,35(16):59-65,7.基金项目
supported by National Natural Science Foundation of China （）
Ph.D.Candidate Scientific Research Innovation Foundation of Tsinghua University （）
