An effective method to limit resonance overvoltage caused by single phase grounding fault in ultra-high voltage AC system

This article takes research based on the Ultra-high voltage(UHV) AC transmission, and studies aiming specifically at the resonance overvoltage that exists in the Ultra-high voltage transmission lines. The present overvoltage conditions and questions exists in UHV are analyzed. And the causes of existence and research status for resonance overvoltage are also analyzed. Referenced on the Jindongnan-Jingmen UHV AC system, this text establishes UHV AC system model in MATLAB/Simulink, and simulates the size of resonance overvoltage in the transmission line as well as provided solving measures.