Adaptive protection method and system for distribution lines based on traveling waves
A self-adaptive technology for power distribution lines, applied in emergency protection circuit devices, electrical components, fault detection according to conductor types, etc., can solve problems such as system overvoltage, and achieve accurate and reliable actions
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[0069] (1) Single-phase grounding fast identification algorithm
[0070] The rapid identification of single-phase ground faults requires the use of traveling wave characteristics of single-phase ground faults and non-single-phase ground faults.
[0071] The zero-sequence current traveling wave / zero-sequence voltage traveling wave is a unique feature of the ground fault, so the ground fault (single-phase ground and two-phase ground) and non-ground fault (two-phase phase-to-phase short circuit and identification of three-phase faults).
[0072] Further, the identification of single-phase grounding and two-phase grounding needs to use the characteristics of the three-phase current traveling wave. There is a significant difference in fault traveling wave characteristics at the measurement point close to the busbar and at the measurement point far away from the busbar. Therefore, two sets of algorithms are used for the measurement points set near the busbar and far away from the ...
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