| 兴安直流线路纵差保护原理的改进 |
| |
| 引用本文： | 李标俊,郭琦,贾旭东,刘涛.兴安直流线路纵差保护原理的改进[J].南方电网技术,2015,9(3):28-30. |
| |
| 作者姓名： | 李标俊 郭琦 贾旭东 刘涛 |
| |
| 作者单位： | 中国南方电网超高压输电公司天生桥局，贵州 兴义 562400,南方电网科学研究院，广州510080,南方电网科学研究院，广州510080,南方电网科学研究院，广州510080 |
| |
| 摘 要： | 结合一起兴安直流线路因高阻接地故障引起的跳闸事故，通过对87DCLL逻辑的分析，对兴安直流线路纵差保护原理进行了改进。提出将87DCLL去掉“600 ms闭锁逻辑”，并基于仿真结果将保护延时调整至800 ms。仿真结果验证了所提措施不会导致87DCLL出现误动，并且在直流线路发生高阻抗接地故障时87DCLL能正确动作。
|
| 关 键 词： | 直流输电 直流线路纵差保护 实时数字仿真系统 高阻抗接地故障 |
Improvement of DC Line Longitudinal Differential Protection Principle in Xing-An HVDC System |
| |
| LI Biaojun,GUO Qi,JIA Xudong and LIU Tao.Improvement of DC Line Longitudinal Differential Protection Principle in Xing-An HVDC System[J].Southern Power System Technology,2015,9(3):28-30. |
| |
| Authors: | LI Biaojun GUO Qi JIA Xudong and LIU Tao |
| |
| Abstract: | Based on analysis of a tripping accident in Xing An HVDC system due to high impedance ground fault and the logic of 87DCLL, this paper presents an improvement of the DC line longitudinal differential protection principle.It is proposed to remove the "600 ms blocking logic" from 87DCLL,and adjust the delay to 800 ms based on simulation results.Simulation results demenstrate that the proposed measures would not lead to 87DCLL malfunction, and 87DCLL can operate correctly when a high impedance ground fault occurs in the DC line. |
| |
| Keywords: | HVDC transmission DC line longitudinal differential protection RTDS high impedance ground fault |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《南方电网技术》浏览原始摘要信息 |
|
点击此处可从《南方电网技术》下载全文 |
