By analysis of zero sequence admittance distribution with single-phase ground fault in the Mine ground 6kV transformer substation power supply system, a new high-performance microcomputer fault line selection device as the core of DSP407 and CPLD is designed by a higher accuracy of fault line selection alignment algorithm-mutual admittance difference summation algorithm.The hardware and software of the device is mainly introduced.By the field test and run,the device proves to be higher accuracy of earth fau...
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