| CPC G01R 31/52 (2020.01) [G01R 31/086 (2013.01); G01R 31/088 (2013.01)] | 25 Claims |
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1. A system for detecting types of electrical faults in a power line circuit of a power grid, said system comprising:
a detector circuit for measuring multiphase voltage signals and multiphase current signals at a location of a power line circuit;
a hardware processor associated with a memory storing program instructions in a computer system, the hardware processor running the program instructions configuring the processor to:
obtain a total zero-sequence impedance value, a total positive-sequence impedance value and a total negative-sequence impedance value of a location of the power line circuit;
compute a total zero-sequence admittance value as a function of said obtained total zero-sequence impedance value;
compute a total admittance value as a function of said obtained total zero-sequence impedance value, the total positive-sequence impedance value and the total negative-sequence impedance value;
for each phase of the multiphase voltage and current signals, obtain a corresponding phase ground fault admittance value at the location of a power line circuit;
use fault type detection logic circuit to determine, based on obtained corresponding phase ground fault admittance values, an occurrence of an electrical fault and an electrical fault type at the power line circuit; and
perform a corrective action at the power line circuit based on the determined electrical fault type.
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