220kv Transmission Line Fault Diagnosis and Analysis

With the development of power system, reliability and stability of transmission lines requires a gradual increase, particularly pays great attention over voltage protection, but each year, the system still occur more accidents and obstacles because of various over-voltage, the largest proportion of fault lightning trip, this paper analyzes the lighting trip accident with the 220kV ShaLi transmission line, based on field data collection and analysis of this fault, explore and study the causes of lightning over-voltage in power system and propose countermeasures to prevent similar accidents.