2008年1月中旬以来,我国大部分地区气温大幅下降,出现大范围持续雨雪、凝冻天气,输变电设施覆冰覆雪严重,遭受不同程度损害,部分地区出现了设备跳闸、杆塔折倒断线情况,电网所受到的威胁无论从范围还是持续时间上都是历史上最严重的,加之受电煤供应紧张等因素影响,电力安全形势非常严峻。 Since the middle of January 2008, the temperature in most parts of China dropped drastically, with a wide range of continuous rain and snowfall, freezing of the weather, severe icing and snow covering of the power transmission and transformation facilities, damage to varying degrees, equipment tripping in some areas, tower collapse Disconnection, power grid threats in terms of range or duration are the history of the most serious, coupled with tight supply of coal and other factors, power security situation is very serious.