电测与仪表2017，Vol.54Issue(9)：6-11,34,7.
基于采样值相关度的广域后备保护算法
A wide area back-up protection algorithm based on the correlation of sample value
摘要
Abstract
In order to solve the problems of setting and coordination of the traditional back-up protection and its malfunction when CT breaks,a wide area back-up protection algorithm based on the correlation of sample value is proposed.The algorithm makes full use of the voltage and current information of the power grid,and the protection criterion is constituted based on the correlation of the sample value of the associated IEDs.Associated IEDs is searched through the associated matrix when CT breaks.The fault element is identified according to the correlation of the associated IEDs and the correlation of the virtual CT.This algorithm is still effective when synch precision is low and CT breaks.Finally,an IEEE 3-machine and 9-bus system is constructed by PSCAD simulation verification,the results of the correlation degree of sample value show that the proposed algorithm can identify various types of faults on line and bus,and has good operational performance.关键词
广域后备保护/CT断线/采样值相关度/关联IED/数据同步Key words
wide area back-up protection/CT break/correlation coefficient of the sample value/associated IEDs/data synchronization分类
信息技术与安全科学引用本文复制引用
孔德洪,吕飞鹏,韩康,江浩..基于采样值相关度的广域后备保护算法[J].电测与仪表,2017,54(9):6-11,34,7.
