输电线微机自适应分相方向纵差保护  

Microcomputer-based Adaptive Directional Pilot Protection for Transmission Lines

作　　者：薛士敏[1] 贺家李[1] 郭征[1] 沈勇环[1] 

机构地区：[1]天津大学电气自动化与工程学院,天津市300072

出　　处：《电力系统自动化》2005年第5期45-49,共5页Automation of Electric Power Systems

摘　　要：提出了一种新的带制动的电流差动保护原理,并将该原理与自适应原理相结合应用到保护中,大大提高了保护的制动特性和灵敏度。分析了其判据和动作特性,并将该原理与其他原理进行了详细的比较,同时介绍了自适应原理在该保护原理中的实现方法。通过仿真试验证明了这一新原理的优越性能。A new current differential protection based on adaptive directional restraint principle is proposed. This new adaptive restraint principle greatly enhances restraint characteristic in case of faults outside the protective zone and greatly increases sensitivity of protection when fault falls within protective zone. This paper analyzes the protection criterion and operating characteristics, compares the proposed protection principle with others and introduces the implementation method. Simulation test of the protection shows the correctness and advantages of the new principle.

关 键 词：微机保护 线路保护 分相电流纵差保护 制动特性 自适应原理 

分 类 号：TM773[电气工程—电力系统及自动化]