Analysis on seismic disaster damage cases and their causes of electric power equipment in 5·12 Wenchuan earthquake

Based on investigation and information in 5·12 Wenchuan Earthquake,the seismic disaster damage of Sichuan power grid was introduced,and the disaster characteristics of the power grid were summarized.Then,the causes of seismic disaster damage of Sichuan power grid were analyzed.The main cause of electric power equipment damage is that the real earthquake intensity was substantially higher than seismic intensity issued in design specification.The characteristics and shortages of the electric power equipment also caused damage.Finally,the anti-seismic capacity general survey for current electric power equipment was proposed,and anti-seismic design for new electric power equipment needs to be performed.The safety reliability of power grid should be increased further.