中压交流系统低电阻接地方式特点简析
Analysis of the Characteristics of Low-resistance Earthing Methods in Medium-voltage AC Systems
马传宝1
作者信息
- 1. 中广核清洁能源科技(上海)有限公司,上海市 200241
- 折叠
摘要
根据中压交流系统低电阻接地方式的特点,结合继电保护和系统安全要求,介绍两种低电阻阻值计算方法,给出阻值选择的建议.此外,中压交流系统不同接地方式对设备选型有重要影响,结合标准规范要求,对设备选型差异进行梳理,以供设计人员参考.
Abstract
Two methods for calculating low resistance values are introduced,and suggestions for selecting resistance values are provided based on the characteristics of low-resistance earthing in medium-voltage AC system,combined with relay protection and system safety requirements.In addition,different earthing methods for medium-voltage AC system have a significant impact on equipment selection.Based on standard specifications,the differences in equipment selection have been sorted out for the reference of designers.
关键词
中压交流系统/低电阻接地/接地网/低电阻阻值/工频故障电压/单相接地短路电流/故障切除时间/设备选型Key words
medium-voltage AC system/low-resistance earthing/earth-electrode network/low resistance value/power-frequency fault voltage/single-phase earth short-circuit current/fault clearance time/equipment selection引用本文复制引用
出版年
2024
NETL
NSTL
万方数据