500 kV智慧变电站过电压监测设计及应用  

Design and Test of Intelligent Monitoring Device for 500 kV Smart Substation

作　　者：孙泽中 易辉 李欣 刘卫东 杨庆[4] SUN Zezhong;YI Hui;LI Xin;LIU Weidong;YANG Qing(State Grid Hunan Electric Power Company Limited Research Institute,Changsha 410007,China;State Grid Yueyang Power Supply Company,Yueyang 414000,China;State Grid Hunan Electric Power Company Limited Maintenance Company,Changsha 410004,China;Chongqing University,Chongqing 400044,China)

机构地区：[1]国网湖南省电力有限公司电力科学研究院,湖南长沙410007 [2]国网湖南省电力有限公司岳阳供电公司,湖南岳阳414000 [3]国网湖南省电力有限公司检修公司,湖南长沙410004 [4]重庆大学,重庆400044

出　　处：《湖南电力》2021年第5期72-77,共6页Hunan Electric Power

基　　金：国网湖南省电力有限公司科技项目(5216A5200001)。

摘　　要：基于500 kV智慧变电站改造实际需求,设计基于串接分压电容的母线过电压监测装置与基于宽带脉冲电流互感器的避雷器放电电流监测装置;对串接分压电容后电压互感器测量精度、信号传输电缆电感对测量信号影响等关键因素进行分析,基于500 kV变电站现场实际选取合适参数,并开展监测装置测量准确性现场验证工作。该监测装置功能完备,能够实现高幅值、高频率的过电压、过电流监测,在500 kV智慧变电站改造项目中已现场应用,能够为故障分析与绝缘设计改进工作提供支撑,对保障电网安全稳定运行具有重要意义。Based on the actual needs of the transformation of 500 kV smart substation,this paper designs the bus overvoltage monitoring device based on series connected capacitor and the arrester discharge current monitoring device based on broadband pulse current transformer,and analyzes the key factors such as the measurement accuracy of voltage transformer with series connected capacitor and the influence of cable inductance on the measurement signal.Based on the actual parameter of 500 kV substation,the appropriate design parameters are selected,and the measurement accuracy of the monitoring device is verified on site.The monitoring device designed in this paper has complete functions,and can realize high amplitude and high frequency over-voltage and over-current monitoring.It has been applied in the project of 500 kV smart station,which can provide support for fault analysis and insulation design,and is of great significance to ensure the safe and stable operation of power grid.

关 键 词：监测装置 电容分压 皮尔逊线圈 EMTP-Atp 500 kV智慧变电站 

分 类 号：TM862[电气工程—高电压与绝缘技术]