电力系统保护与控制Issue(17)：45-50,6.
基于电容序列近似熵的消弧线圈接地选线方法
Fault line selection approach of extinction coil based on capacitance sequence approximate entropy
殷家敏 1吉畅 2罗建 2张鹏2
作者信息
- 1. 重庆市电力公司长寿供电分公司，重庆401220
- 2. 重庆大学输配电装备及 系统安全与新技术国家重点实验室，重庆400044
- 折叠
摘要
Abstract
Anti-polarity of zero sequence CT leads to the failure in NES fault line selection, after analyzing the reason, a new selection approach using approximate entropy of ground admittance is proposed. Difference method is used to improve matrix pencil and solve the problem of component annihilation, therefore the pole information of complex frequency domain is got accurately. Evaluating the approximate entropy of distribution capacitance of each feeder under arc suppression coil compensation effect, then it is discriminated as fault feeder when the numerical value is beyond a threshold value. The method eliminates the error due to the limitation of anti-polarity of zero sequence CT and can also be applied to system with two feeders. Experimental results show that it can increase the accuracy and dependability of fault line detection effectively.关键词
消弧线圈接地系统/单相接地故障/矩阵束/近似熵Key words
neutral indirectly grounded system/single-line to ground fault/matrix pencil/approximate entropy分类
信息技术与安全科学引用本文复制引用
殷家敏,吉畅,罗建,张鹏..基于电容序列近似熵的消弧线圈接地选线方法[J].电力系统保护与控制,2015,(17):45-50,6.
