湖南大学学报（自然科学版）2024，Vol.51Issue(6)：148-158,11.DOI:10.16339/j.cnki.hdxbzkb.2024234
基于首行波曲率半径的交直流互联电网交流输电线路单端量保护
Single-terminal Protection of AC Transmission Lines in AC-DC Network Based on Curvature Radius of First Traveling Wave
摘要
Abstract
The fault characteristics of inverter AC transmission lines in AC-DC interconnection networks are quite different from those of pure AC systems.The protection scheme of traditional AC transmission lines is no longer suitable for inverter AC transmission lines.First,based on the different topological structures of the inverter AC transmission line when the fault occurs inside and outside,the expressions of the first traveling wave of the down-mode fault component current are derived,respectively,and the difference of the first traveling wave characteristics of the AC transmission line when the fault occurs inside and outside is clarified theoretically.Then,wavelet transform mode maximum method and Levenberg-Marquardt algorithm are used to extract the curvature radius of the first traveling wave,and a high-reliability single-terminal protection scheme is constructed by using the curvature radius of the first traveling wave to identify the fault region.Finally,the AC-DC interconnection network model is built in PSCAD/EMTDC,and the protection scheme is verified by MATLAB.The simulation results show that the proposed protection scheme is fast and effective,has high reliability,strong resistance to transition resistance,and good anti-noise ability.关键词
交直流互联电网/单端量保护/Levenberg-Marquardt算法/小波变换模极大值法/首行波曲率半径Key words
AC/DC interconnection network/single end protection/levenberg-marquardt algorithm/wavelet transform mode maximum method/radius of curvature of first traveling wave分类
信息技术与安全科学引用本文复制引用
高淑萍,段云青,宋国兵,郑瀚,李晓芳..基于首行波曲率半径的交直流互联电网交流输电线路单端量保护[J].湖南大学学报（自然科学版）,2024,51(6):148-158,11.基金项目
国家自然科学基金资助项目(51777166),National Natural Science Foundation of China(51777166) （51777166）
国家自然科学基金国际合作与交流项目(52061635105),International Cooperation and Exchange Program of the National Natural Science Foundation of China(520616 35105) （52061635105）
国家电网有限公司总部科技项目(52094020006U),Headquarters Science and Technology Project of State Grid Corporation of China(520940 20006U) （52094020006U）
