Examples of disasters caused by high-voltage line problems in snowstorms

June 5, 20081From mid-October to early February, there was a cold, rainy, snowy and freezing weather in most parts of southern China and the eastern part of northwest China. The low temperature, rain, snow and freezing weather lasting for more than 20 days has seriously affected the operation of power systems in more than a dozen provinces (autonomous regions and municipalities) in southern China. The disaster * * * caused power outages in 169 counties, 80 counties under the jurisdiction of State Grid Corporation and 89 counties under the jurisdiction of China Southern Power Grid Corporation. As of February 15, 36,056 power lines and 1933 substations were shut down due to disasters, which caused great losses to State Grid Corporation, China Southern Power Grid Corporation and some local power companies.

Example 2:

Since the mid-October of 65438/kloc-0, the southeast and northeast of Chongqing have suffered from a large-scale continuous rain, snow and freezing disaster, and the 220 kV power supply lines have been seriously damaged, resulting in the failure of normal power supply in some districts and counties. As of 0: 00 on February 2, the tower collapsed, the pole fell 1033, and the pole was broken or damaged 127 1. During the disaster, the power transmission and transformation facilities in southeastern Chongqing and northeastern Chongqing were covered with snow and ice, and the thickness of some wires exceeded the design standard by 20 times, which seriously endangered the power grid security and the city's production and living electricity consumption.

Example 3:

After the freezing weather 10, 105 power lines were forced to stop,105 substations were forced to lose power, and several power towers collapsed, which once caused power outages in seven counties of Guizhou/kloc-0, causing a lot of inconvenience to local residents.