电力系统自动化Issue(4)：92-97,126,7.DOI:10.7500/AEPS201302036
一种抗通信延时及丢包的差动保护算法
A Communication Delay-resistant and Packet Loss-resistant Differential Protection Algorithm
摘要
Abstract
A transformer differential protection algorithm is proposed based on the third-order dynamic time warping (DTW). This method makes use of the current sample value within the bilateral data window of differential protection to constitute the shortest distance matrix.Via the shortest distance searching algorithm,a shortest path can be found in the matrix and take the average value of local shortest distance elements in the matrix through which the path passes as the differential current of bilateral sample current.Should data delay and data packet-loss happen in a digital substation for communication reasons,by using this differential protection algorithm,protection malfunction due to external faults can be avoided and protection can act reliably during internal faults.Simulation has verified the action performance of conventional phase differential protection and DTW differential protection during external or internal faults in different delay circumstances and different packet loss rates conditions.The results show that DTW differential protection has obvious advantages over conventional phase differential protection in delay-resistant,packet loss-resistant performance and sensitivity.关键词
数字化变电站/变压器保护/差动保护/通信延时/丢包/动态时间弯曲Key words
digital substation/transformer protection/differential protection/communication delay/packet loss/dynamic time warping (DTW)引用本文复制引用
王业,陆于平..一种抗通信延时及丢包的差动保护算法[J].电力系统自动化,2014,(4):92-97,126,7.基金项目
国家自然科学基金资助项目(51377022,50977012)。@@@@This work is supported by National Natural Science Foundation of China(No.51377022,No.50977012) （51377022,50977012）
