Faults and Operation and Maintenance Points of Industrial Power System Relay Protection
The relay protection system of a power plant has episodic faults in the long-term operation process,and the main problems are the mis-activation of current-flow interruption protection,and the mis-activation of zero-sequence overcurrent protection for single-phase ground fault.In order to solve the above problems,after sufficient research and analysis,it was found that the causes of the faults were the wrong setting value of the relay protection system and unreasonable setting method,which led to the setting results not matching the actual demand.The operation and maintenance management measures for the fault factors are to re-calibrate the key parameters such as relay protection action current and action time of the plant high voltage power system and the plant low voltage power system.
industrial power systemrelay protection failurecalibration methodoperation and maintenance measures
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