电网技术2011，Vol.35Issue(6)：15-21,7.
基于行波固有频率的特高压输电线路故障选相
Faulty Phase Selection for UHV Transmission Lines Based on Natural Frequencies of Traveling Waves
摘要
Abstract
Because of its rapidity, the traveling wave principle-based faulty phase selection, in which the transient components appeared during the fault process are utilized, can meet the demand of developing ultra-high speed protection. In view of the defect in existing traveling wave-based faulty phase selection that it is difficult to precisely identify the wave front,a new faulty phase selection method based on natural frequencies of traveling waves is proposed By use of multiple signal classification, the power spectrum of module component of current is obtained, and then by means of comparing the dominant frequencies of conductor modulus in the power spectrum the faulty phase can be determined. The reliability of the proposed method is verified by experimental verification, in which a simulation model of 1 000 kV AC transmission line from Southeast Shanxi via Nanyang to Jinmen is built on the platform of PSCAD/EMTDC. Simulation results show that the faulty phase selection result does not depend on the time when fault occurred, the faulty position and transition resistance, and the required data window is short, thus the ultra high speed protection based on the proposed method is convenient to implement关键词
行波/固有频率/故障选相/特高压输电线路Key words
traveling wave/ natural frequencies/ faulty phase selection/ ultra high voltage (UHV) transmission line分类
信息技术与安全科学引用本文复制引用
陈双,何正友,李小鹏..基于行波固有频率的特高压输电线路故障选相[J].电网技术,2011,35(6):15-21,7.基金项目
国家自然科学基金项目(50877068) （50877068）
高等学校博士学科点专项科研基金资助项目(200806130004). （200806130004）
