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| A Method of Simulating the Fault Current Using Field-Circuit Coupling for Partially Short-Circuited Transformer Winding |
| Zhang Junjie, Liu Lanrong, Liu Dongsheng, Liu Liqiang, Zhang Xile, Hu Qifan |
| Institute of Electrotechnology Baoding Tianwei Baobian Electric Co. Ltd Baoding 071056 China |
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Abstract The inter-turn short circuit, the inter-segment short circuit and various hypothetic coil short-circuit faults of transformers are calculated with field-circuit coupling method. Then the steady short circuit current on the line end and the impedance in the fault state can be obtained. According to the calculated system parameters and the initial phase angle in the fault time, the fault transient waveform can be simulated with math method. It can be used to infer the reason of short current fault by comparing this waveform with the one in the fault recorder. It is proved that the system fault is not caused by the coil short-circuit fault by applying the proposed method to large single-phase power transformer.
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Received: 08 October 2013
Published: 30 October 2015
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2015, Vol. 30 
