摘要
特高压直流接入后,其受端电网的运行受到较大影响。交流系统故障会引起直流换相失败,如交流系统不能在一定时间内切除故障,则可能引起直流连续换向失败甚至引起直流闭锁。目前变电站死区及断路器失灵故障的切除速度难以满足特高压直流的要求。本文提出了三个方案用以解决该问题,并对三种方案的优缺点进行了分析。
HVDC has a greater impact of the receiving power grid. AC system fault will cause DC commutation failure, while the AC system fault can＇t be removed in a certain time, it may cause DC continuous commutation failure or even cause DC blocking. At present, the dead zone and failure protection can＇t meet the requirements of UHVDC. In this paper, three solutions are proposed to solve the problem, and the advantages and disadvantages of the three schemes are analyzed.
出处
《湖南电力》
2017年第6期75-78,共4页
Hunan Electric Power
