我国电力系统地震灾害损失基本特征分析

Preliminary Analysis of Basic Characteristics of Earthquake Disaster Loss in China Power System

基于1997—2017年中国大陆247次地震灾害资料,统计了电力系统在97次地震中遭受的灾害损失情况,并分析了其在不同震级地震中的灾害经济损失情况及特点。结果表明:①电力系统平均每年遭受4.6次地震灾害;②灾害性地震造成电力系统成灾占比随震级增高而增大,M<5.0、5.0≤M<5.9、6.0≤M<6.9、M≥7.0地震成灾占比分别为13.6%,38.9%,56.2%和62.5%,平均为38.5%;③电力系统地震灾害损失随地震震级增大而增大,但二者之间并非简单的线性关系;④电力系统地震灾害主要分布在我国云南、四川、新疆、甘肃等中国西部地区。

Based on the data of 247 earthquake disasters in China's Mainland from 1997 to 2017,we statistic the loss of power system in 97 earthquakes,and analyze the economic losses and its characteristic of the power system in earthquakes with different magnitude. The results show that:①The power system suffers an average of 4.6 earthquake disasters per year;②The ratio of power system disasters caused by earthquakes increases with the increase of magnitude,and the disaster rates of M <5.0,5.0≤ M <5.9,6.0≤ M <6.9, M ≥7.0 earthquakes are 13.6%,38.9%,56.2% and 62.5% respectively,and 38.5% on average.③The economic losses of power system caused by earthquake increase with magnitude,but the relationship between them is nonlinear.④Power system disasters caused by earthquakes mainly occurred in western provinces of China,such as Yunnan,Sichuan,Xinjiang,and Gansu.