摘要
为降低交直流相互影响带来的系统安全稳定风险,目前广东电网主要采取了调整网架结构、配置动态无功、优化电网运行方式等措施。本文对落点珠三角常规直流受端柔性化改造前后电网进行安全稳定分析,结果表明常规直流柔性化改造能够在一定程度上提高系统稳定水平,但效果不显著;仅从提升系统稳定性的角度来看,柔性化改造必要性不够充分。本文为全面认识常规直流柔性化改造提升系统稳定性的潜力,进一步研究珠三角与长三角常规直流柔性化改造效果及必要性提供了较好研究基础,同时为综合施策解决多直流馈入受端电网交直流相互影响问题提供了重要参考。
In order to reduce the risks concerning system safety and stability brought about by AC/DC interactions,Guangdong Power Grid has taken such measures as adjusting grid structure,deploying dynamic reactive power compensation,and optimizing grid operation mode,etc.In this paper,system stability analysis is carried out before and after refurbishment of conventional HVDCs feeding into the Pearl River Delta region.The results show that VSC-based refurbishment of conventional HVDC can improve the stability of the system to a certain extent,but the improvements are not significant.From the perspective of system stability improvement only,the necessity for VSC-based HVDC refurbishment is not justified.This paper can help to fully appreciate the potential of VSC-based HVDC refurbishment to improve system stability,and provide a good research foundation to further explore the necessity and system scheme of VSC-based refurbishment of conventional HVDCs in Pearl River Delta and Yangtze River Delta power grids.At the same time,this paper provides valuable reference to solve the problems arising from AC/DC system interactions in load center grids with multiple DC infeed.
作者
郭知非
李峰
郑秀波
蔡万通
GUO Zhifei;LI Feng;ZHENG Xiubo;CAI Wantong(Electric Power Research Institute,CSG,Guangzhou,510663,China;Power Grid Planning Center of Guangdong Power Grid Company,Guangzhou 510080,China)
出处
《南方电网技术》
CSCD
北大核心
2019年第9期6-12,共7页
Southern Power System Technology
关键词
交直流相互影响
常规直流柔性化改造
安全稳定
珠三角电网
AC/DC system interactions
VSC-based refurbishment of conventional HVDC
security and stability
Pearl River Delta region power grid
