特高压潇湘站500kV母线分母运行对湖南电网影响分析  

Analysis on Influence of Separate Operation of 500 kV Bus of UHV Xiaoxiang Station on Hunan Power Grid

作　　者：柳永妍 甘王伟 张岩 肖佩 崔挺 呙虎 LIU Yongyan;GAN Wangwei;ZHANG Yan;XIAO Pei;CUI Ting;GUO Hu(State Grid Hunan Electric Power Company Limited Research Institute,Changsha 410208,China;State Grid Huaihua Power Supply Company,Huaihua 418000,China;State Grid Hunan Electric Power Company Limited,Changsha 410004,China)

机构地区：[1]国网湖南省电力有限公司电力科学研究院,湖南长沙410208 [2]国网湖南省电力有限公司怀化供电公司,湖南怀化418000 [3]国网湖南省电力有限公司,湖南长沙410004

出　　处：《湖南电力》2023年第2期112-116,共5页Hunan Electric Power

基　　金：国网湖南省电力有限公司科技项目(5216A522000N)。

摘　　要：1000kV潇湘—赣江特高压交流双回线路投运后,省间交流通道无功支撑能力提升,系统稳定性得到增强,但也导致系统短路电流的增大。为保障湖南电网暂态电压稳定,需要对省内机组的开机与旋转备用提出要求,因此限制了电网供电能力和运行灵活性。针对此问题,对湖南电网500kV网架结构进行优化研究,提出特高压潇湘站500kV母线分母运行优化方案,降低近区短路故障对系统的冲击,提高电网暂态电压稳定水平,提升电网供电能力,为湖南电网安全稳定运行提供技术支撑。After the commissioning of the 1000 kV UHV AC double-circuit line from Xiaoxiang—Ganjiang,the reactive power support capability of the inter-provincial AC channels has been enhanced,and the system stability has been enhanced,but it also leads to the increase of the system short-circuit current.In order to ensure the transient voltage stability of Hunan power grid,it is still necessary to put forward the requirements for the start-up and rotation of units in the province,which limits the power supply capacity and operational flexibility of the power grid.Aiming at this problem,the optimization of 500 kV grid structure in Hunan power grid is studied,and the optimization scheme of 500 kV bus-bar operation in UHV Xiaoxiang station is put forward to reduce the impact of near-area short-circuit fault on the system.It can improve the transient voltage stability level and the power supply capacity of power grid,and provide technical support for the safe and stable operation of Hunan power grid.

关 键 词：特高压交流 暂态电压稳定 外受电能力 网架优化 

分 类 号：TM712[电气工程—电力系统及自动化]