Analysis of Two Short Circuit Faults in Distribution Transformers
According to two short circuit faults of 35 kV dry type distribution transformers in a 35 kV power system by low resistance grounding,analysis cause and improvement are proposed.Combined with fault recording,inspection and test,fault processes and protection operations are analyzed by symmetrical component method,two-port network method and simulated,verified by PSCAD/EMTDC and disassembling inspection.Improvement of configuration and setting of protective relaying and status detections are proposed.
distribution transformerlow resistance grounding power systemturn-to-turn short circuitsingle-phase grounding short circuitrelay protection
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