220 kV变电站投切并联电容器组精准合闸策略

为了减小220 kV变电站合闸并联电容器产生的涌流对系统的冲击,提高电能质量,本文依据实际220 kV变电站系统建立并联电容器合闸的数学模型,通过计算得到涌流最小时并联电容器精准合闸策略并仿真验证了合闸策略的有效性.分析了机械开关合闸的分散性和电压同步测量误差,给出减小误差办法并计算合闸延时,确保并联电容器组在特定时刻...

Precise Closing Strategy on Switching Shunt Capacitor Bank in 220 kV Substation

For reducing the impact of inrush current generated by the closing shunt capacitor in 220 kV sub?stations to the system and improving power quality,in this paper,the mathematical model of shunt capacitor is set up in accordance with actual 220 kV substation systems.The precise closing strategy of shunt capacitor bank is obtained by calculating the minimum inrush current and effectiveness of the closing strategy is veri?fied by simulation.The closing dispersion of mechanical switch and synchronous measurement error of voltage are analyzed.The method of reducing the error is given and the time delay in closing operation is calculated to ensure that shunt capacitor banks can close accurately at a specific time and effectively re?duce the closing inrush current of shunt capacitor.