特高压直流输电系统雷击闭锁对送端电网影响的分析

Analysis of the influence of the lightning blocking of the UHVDC system on the sending power grid

以2015年四川电网为对象,开展了雷击造成特高压直流输电通道闭锁对送端电网安全稳定运行影响的研究。给出了特高压直流系统的准稳态模型,利用PSASP建立了2015年四川电网丰大运行方式下包特高压直流输电通道的电网模型。基于系统稳定性判据,通过仿真分析了雷击造成不同特高压直流输电通道单极/双极闭锁时对送端电网安全稳定的影响。文章对含特高压直流工程的电网安全稳定运行具有参考价值。

Taking the Sichuan power grid as the object,this paper conducts the analysis of the influence of the UHVDC system blocking,caused by lightning strike,on the safe and stable operation of the sending power grid.The quasi-steady-state model of the UHVDC system is presented,the simulation model of Sichuan power grid including UHVDC systems under heavy load operation mode during the flood season in 2015 is established by using PSASP software.Based on the stability criterions of power system,the influences of the monopolar/bipolar latching of the UHVDC system caused by the lightning strike on the sending power grid are analyzed through simulations.This paper is of some reference significance for the stable operation of power grid with UHVDC system.