浅析纵联保护的灵敏度分析
Several Sensitivity Analyses of Pilot Protection
沈一忱 1蔡韧 1郁悦1
作者信息
- 1. 国网上海市电力公司市区供电公司,上海200080
- 折叠
摘要
分析了基于工频正弦量的全电流差动保护判据、基于故障分量的差动保护判据、基于故障分量和全电流的复式比率差动保护判据等四种判据的基本原理.针对常规电流差动保护易受故障过渡电阻等影响的缺点,同时为加强差动保护的动作灵敏度,对基于故障分量采样值电流差动保护的原理、判据、动作特性等作了讨论,通过MATLAB的仿真与分析,结果表明基于故障分量的电流差动保护在可靠性、灵敏度方面明显优于常规电流差动保护.
Abstract
This paper makes a detailed analysis based on the power frequency sine all the current differential protection criterions,based on the fault component differential protection criterions,based on the current fault component and the complex percentage differential protection criterion of four kinds of the basic principle of criterion.The conventional current differential protection is susceptible to fault the weaknesses of the influence of interim resistance,and to strengthen the differential protection action sensitivity,fault component based on sample value current differential protection,the principle of the criterion,action characteristics were discussed,the simulation and analysis through MATLAB,and the result shows that the fault component based on sample value current differential protection in the reliability and sensitivity is better than conventional current differential protection.
关键词
输电线路/电流差动保护/归一化/保护判据/灵敏度Key words
Transmission lines/Current differential protection/The normalized/Protection criterion/Sensitivity引用本文复制引用
出版年
2014
NETL
NSTL
万方数据