基于V-Q曲线的天津电网电压稳定分析及改进措施

Research on Voltage Stability in Tianjin Power Grid Based on V-Q Curve

随着外受电容量日益增大,受端地区机组增加速度放缓,负荷中心地区日益缺乏动态无功支撑,电压稳定性脆弱,因此电压稳定问题引起研究人员的密切关注。文章首先采用V-Q曲线法和灵敏度法对天津电网各500 kV母线无功需求敏感度进行分析,寻找到天津电网电压最低区域即电压稳定性薄弱区域,然后为了提高薄弱区域的电压稳定性,提出提高电压稳定性措施,并重点对采取配置无功补偿方法进行研究,针对无功补偿装置不同安装地点、补偿装置类型及容量大小进行了仿真计算,最后提出合理无功配置方案。

With the augment of the external capacitance,the growth rate of generator in load center is slowing down. The voltage stability of load center area is fragile for increasingly lacking of dynamic reactive power support, so the problems of voltage stability cause the close attention of researchers. This paper firstly raises the receiving-power ratio of Tianjin power grid,secondly finds the weak area of the grid voltage stability,thirdly makes the simulation calcula- tion of different installation sites, different types and different capacity of reactive power compensation device to im- prove the voltage stability of the weak area. Finally a practical method is provided for the research of dynamic reactive power compensation in Tianjin power network.