2011—2013年国家电网公司输电线路故障跳闸统计分析

Statistical Analysis of Transmission Line Fault Tripping in State Grid Corporation of China in 2011—2013

随着电网规模不断扩大、负荷持续增加,自然灾害和外力破坏等导致输电线路故障跳闸呈高发态势。为防止大面积停电事故的发生,需不断总结电网故障特点及其规律。总结了2011—2013年国家电网公司66k V及以上交直流输电线路故障跳闸情况,以2013年为例,从电压等级、故障原因等多层面详尽深入分析,并对电网运行影响较大的故障、同杆或同一输电通道线路"N-2"故障进行统计。结合电网运行实际、电力生产面临新形势和特高压互联电网的发展,提出了相关建议,对电网实时运行具有一定的指导意义。

With the expansion of power grid and increase of power load,natural disasters and external force damages result in more and more transmission line trips. In order to prevent large-area blackout and improve the power system reliability,it's necessary to review continuously the grid fault characteristics and pattern. This paper summarizes and analyzes 66 k V and above AC / DC transmission line fault trips of State Grid Corporation of China from 2011 to 2013 using the annual operation data. The year of 2013 was taken as an example,and in-depth analysis has been conducted from the aspect of voltage levels,causes and so on. And the serious faults of power grid and ' N-2' line failures in the same transmission channel were analyzed. At last,this paper discusses the existent main problems with typical cases,analyzed the weak points of the operating systems and proposes some suggestions.