化工厂中压电流互感器参数的选择  

Parameter Selection for MV Current Transformer for Chemical Plant

作　　者：王建军 WANG Jian-jun(SINOPEC Nanjing Engineering&Construction Inc.,Nanjing 211100,China)

机构地区：[1]中石化南京工程有限公司,江苏南京211100

出　　处：《硫磷设计与粉体工程》2020年第5期46-48,I0002,共4页Sulphur Phosphorus & Bulk Materials Handling Related Engineering

摘　　要：中压电流互感器的短路动、热稳定,准确限值系数和二次负荷这三个重要参数直接影响到配电系统二次表计的精度和继电保护的安全性。该参数选择过大会造成设备投资的浪费,该参数选择偏小可能会造成配电系统的重大事故。以某化工厂的工程设计为例,介绍了电流互感器动、热稳定,准确限值系数和二次负荷的校验过程,供设计人员参考。The three key parameters of MV current transformer,namely the short circuit dynamic and thermal stability,accurate limit factor and secondary load,have direct influence on the precision of the secondary meter of the power distribution system,and the safety of relay protection.The parameters,if too big,may result in costly equipment investment,if too small,may result in major incidents in the power distribution system.By referring to an actual project for a chemical plant,the calibration process is outlined for the current transformer’s dynamic and steady stability,accurate limit factor and secondary load,for reference by the designers.

关 键 词：电流互感器 参数选择 热稳定 二次负荷 准确限值系数 

分 类 号：TM452.02[电气工程—电器]