Abstract：This paper investigated the effect of the stator inter-turn short circuit position on the electromagnetic torque of generator by theoretical analysis, numerical simulation, and experiment verification. Firstly, the detailed expressions of the electromagnetic torque respectively under static air-gap eccentricity fault and static air-gap eccentricity & stator inter-turn short circuit composite faults are deduced to obtain the mapping relationship between the shorted position and the electromagnetic torque. Then, the experiment study and the simulation work are taken based on the MJF-30-6 type fault simulating generator. The finite element method (FEM) model of this generator was set up in Ansoft to calculate the electromagnetic torque under the composite faults with different shorted positions. The experimental tested data had the consistent result with the theoretical analysis and simulation data. It is shown that, the mapping relation of the electromagnetic torque and the angle between the shorted position and the min air-gap position is generally in cosine pattern. The closer the shorted position is near the min air-gap position, the more mean electromagnetic torque would be decreased, while the 2nd and 4th components would be increased more. The achievement obtained in this paper is a significant supplement to the stator inter-turn short circuit analysis and would be beneficial to the practical monitoring and diagnosis on this fault.
何玉灵,王发林,唐贵基,蒋宏春,袁兴华. 考虑气隙偏心时发电机定子匝间短路位置对电磁转矩波动特性的影响[J]. 电工技术学报, 2017, 32(7): 11-19.
He Yuling,Wang Falin,Tang Guiji,Jiang Hongchun,Yuan Xinghua. Effect of Stator Inter-Turn Short Circuit Position on Electromagnetic Torque of Generator with Consideration of Air-Gap Eccentricity. Transactions of China Electrotechnical Society, 2017, 32(7): 11-19.
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2017, Vol. 32 
