300MVar级同步调相机对湖南电网稳定的影响研究

Influences of 300MVar synchronous condensers on the stabilities of Hunan power grid

研究在湖南电网配置300MVar级的同步调相机后,对湖南受端电网稳定水平的影响。首先介绍大容量调相机的基本结构和技术特性。然后分析湖南电网存在的暂态电压稳定问题。从电网暂态电压稳定和最小开机方式的角度,综合评估同步调相机对电网稳定水平的影响。最后通过仿真进行对比分析,结果表明同步调相机具有较好的动态电压支撑能力和较强的短时过载能力,能有效改善湖南电网的稳定水平。

This paper focuses on the influences of 300MVar synchronous condensers on the stabilities of Hunan power grid.Firstly,the basic structure and characteristics of synchronous condensers are introduced. And then,the transient voltage instability problem is analyzed without the synchronous condensers. Considering both the system transient voltage stability and the requirements of minimal operation generators,the effects of synchronous condensers on the system stabilities are estimated comprehensively. The simulation results on Hunan power grid verify that the synchronous condensers have better dynamic voltage supports and overload capability,and hence can improve the system stabilities effectively.