220kV变电站投切并联电容器组精准合闸策略  

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

作　　者：宋向征 郭春林[1] 杨洪旺 朱柯佳 SONG Xiangzheng;GUO Chunlin;YANG Hongwang;ZHU Kejia(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《电力电容器与无功补偿》2021年第1期6-11,共6页Power Capacitor & Reactive Power Compensation

摘　　要：为了减小220kV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220kV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精准合闸,能够有效减小并联电容器组合闸涌流。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.

关 键 词：并联电容器组 精准合闸 投切策略 误差分析 

分 类 号：TM63[电气工程—电力系统及自动化] TM53