基于V-Q曲线分析SVC提高湘南电压稳定性分析

Analysis of Improving Voltage Stability by SVC Based on V-Q Curve in Southern Hunan Power Grid

随着祁韶特高压直流接入湖南电网,以及湖南水电、风电、光伏等清洁资源的大力开发,常规机组增速放缓。若湘南常规机组开机方式不能满足最小开机要求,易导致湘南电网无功支撑不足。文中首先介绍了TRC型SVC的基本运行原理,建立了2018年湖南电网计算模型,再针对郴州地区SVC是否运行,对比湘南电网变电站的V-Q曲线,并运用计算仿真验证了SVC对提高湘南电网电压稳定的效果。

With the Qishao HVDC accessed to the Hunan power grid,and the vigorous development of clean resources such as hydro-power,wind power,photovoltaic and other clean resources,the growth rate of conventional units is slowing down.If the start-up mode of conventional units in the southern Hunan power grid cannot meet the minimum requirement,it is possible to cause the lack of reactive power support of the southern Hunan power grid.In order to improve the voltage stability of the Hunan power grid,this paper firstly introduces the SVC basic operation principle of TCR type,and establishes the calculation model of Hunan power grid in 2018,and then compares the V-Q curves of the substation in the southern Hunan power grid according to whether the SVC of Chenzhou area is running or not.The effect of SVC to improve voltage stability of the Hunan power grid is verified by computer simulation.