Research on assessment method of cascading hazard to substation by earthquake damage

This authors of this article analyze the characteristics and influencing factors of cascading hazard to substation, try to provide classification standard for hazard level of damage to substation, introduce hazard index, and explanatorily establish the method for rapid assessment of hazard level when substation suffers from earthquake damage considering earthquake damage, electricity load and voltage level as hazard factors. Then trial calculation of cascading hazard is carried out based on the data about damage to substations by Wenchuan Earthquake in 2008. The calculation result shows that this method has certain reliability and relatively strong operability, thus it can be used as reference for rapid assessment of cascading hazard situation of district electric power users caused by earthquake damage to substation and to determination of urgent and key targets of emergency rescue during earthquake.