Academic Journal of Engineering and Technology Science, 2020, 3(2); doi: 10.25236/AJETS.2020.030201.
Yan Chuang, Jiang Li
State Grid Liaoning Electric Power CO,LTD. Power Electric Research Institute, Shenyang, Liaoning110015, China
Over-voltage such as operation, interception, resonance and lightning strike of power system threaten the safe operation of electrical equipment insulation and power system. Especially, single-phase intermittent arc grounding overvoltage is the most serious when intermittent arcing occurs. When grounding, due to the repeated intermittent arcing and repeated re-ignition, the high-frequency oscillation overvoltage will be caused in the faulty and non-faulty phase of the inductor-capacitor loop, and the overvoltage amplitude of the non-fault phase is generally reachable. 3.15-3.5 times the phase voltage, often due to single-phase grounding and then become multi-phase grounding, and the large-scale power outage of the power system caused by the accident caused by the accidental expansion.
grid voltage; protection research
Yan Chuang, Jiang Li. Research on grid voltage suppression and current limiting protection. Academic Journal of Engineering and Technology Science (2020) Vol. 3 Issue 2: 1-8. https://doi.org/10.25236/AJETS.2020.030201.
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