摘要
10kV系统为小电流接地系统,线路单相接地是最常见的故障及停电诱因,其存在的危害和风险较大。目前电网运行实际中各类故障线路选判方式准确性不高,通过分析故障情况下故障线路电流的特点,提出利用零序过流保护进行较准确的选判方案,并通过对实际应用情况进行跟踪,确认了方案的实用性。
The 10kV power system is a smal1 current earthing system, and the single-phase-to-earth of the power line is the commonest fault and power outage reason, which is quite risky and dangerous. At present,fault line selection modes in power grid operation are not accurate enough. By analyzing characteristics of fault line current in a fault condition, the paper suggests adopting zero sequence overcurrent protection for line selection more accurately; moreover, it tracks the practical application, which confirms the practicality of the scheme.
出处
《浙江电力》
2016年第5期47-49,共3页
Zhejiang Electric Power
关键词
配电网
单相接地
选线
零序电流
distribution system
single-phase-to-earth
line selection
zero sequence current
