电力系统保护与控制2012，Vol.40Issue(11)：61-69,9.
基于广域信息多端高压输电区域后备保护
A novel wide area backup protection for multi-terminal transmission lines system
摘要
Abstract
Using distributed parameter model, a new backup protection for multi-terminal high voltage transmission lines system is proposed based on wide area information. The backup protection consists of a new principle of wide area current differential protection and an algorithm of fault branch selection. In a distributed parameter circuit under normal operation, the algebraic sum of current flow-in and flow-out of the reference point selected in the multi-terminal high voltage transmission system is zero, while in case of fault occurring, the fault current can be reflected accurately by the differential variable of the reference point. Using this character, the wide area current differential protection can detect the fault within the protective zone. Based on the root distribution features of the fault-branch-selection equation, the fault branch selection algorithm is able to select the fault branch and locate the fault position. Calculated and analyzed by the wide area backup protection server, if a fault happens in the protective zone, the master station sends control command to the tripping device of fault line via communication net The tripping device trips off the breakers of the fault line after receiving the trip-off command, isolating the fault from the system. Simulation test verifies the correctness and effectiveness of this backup protection algorithm.关键词
多端高压输电区域/广域后备保护/广域电流差动保护/故障支路选择算法/分布参数模型Key words
multi-terminal HV transmission lines system/ wide area backup protection/ wide area current differential protection/ fault section selection method/ distributed parameter model分类
信息技术与安全科学引用本文复制引用
马静,曾惠敏,林小华..基于广域信息多端高压输电区域后备保护[J].电力系统保护与控制,2012,40(11):61-69,9.基金项目
国家重点基础研究发展计划项目(973项目)(2012CB215200) （973项目）
国家自然科学基金重点项目(50837002) （50837002）
国家自然科学基金项目(50907021) （50907021）
高等学校学科创新引智计划(B08013) （B08013）
中央高校基本科研业务费专项资金项目(11MG01,09QX64) （11MG01,09QX64）
教育部留学回国人员科研启动基金资助项目(教外司留[2011]1139) （教外司留[2011]1139）
河北自然科学基金项目(E2012502034) （E2012502034）
