十二相整流同步发电机定子匝间短路故障计算

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Abstract 12-phase synchronous generator-rectifier-load systems are widely used in ships, aircraft and other mobile platforms, since they can supply high-power and high-quality DC source. In view of the highly reliable requirements for the safe operation of the platform, this paper deals with the inter-turn short circuit faults in stator winding of the 12-phase synchronous generators, including the theoretical and experimental research. This paper establishes the multi-loop mathematical model, considering short circuit location, space harmonics in air-gap magnetic field, as well as circuit topology varying with rectifier diodes on-and-off states under normal operation and stator inter-turn faults. Variable step algorithm of numerical integration method is used to solve the mathematic model composed of time-varying coefficient differential equations. The voltages and currents of the stator windings, rotor windings and DC load can be simulated digitally, in both normal operation and stator inter-turn faults. A series of stator inter-turn short circuit experiments are carried on a special 4kW model machine in load condition. The simulation results coincide well with the experiment data, which verifies the correctness of the mathematic model. Then the electric characteristics of the stator inter-turn faults in 12-phase machine systems are analyzed. The calculation results accomplished in this paper provides an important basis for the detection and protection research of stator inter-turn faults in 12-phase synchronous generator.

Key words： 12-phase synchronous generator rectifier load system stator inter-turn short circuits multi-loop mathematic model

Received: 25 November 2013 Published: 17 June 2014

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TM341

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	Sun Yuguang
	Huang Ziguo
	Chen Li
	Wang Xiangheng

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Sun Yuguang,Huang Ziguo,Chen Li等. Calculation of Stator Winding Inter-Turn Short Circuit in 12-Phase Synchronous Generators with Rectifier Load System[J]. Transactions of China Electrotechnical Society, 2014, 29(3): 57-64.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I3/57

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