Statistical Analysis of Transmission Line Fault Tripping in State Grid Corporation of China in 2011-2013
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 66kV 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.
NETL
NSTL
万方数据
