110kV扩大内桥接线备自投逻辑分析  

Analysis of logic conditions of back-up switching equipment in 110 kV enlarging internal bridge main connection

作　　者：郭碧媛 张丰 

机构地区：[1]福建省福州电业局,福建福州350009

出　　处：《电力系统保护与控制》2010年第7期124-128,共5页Power System Protection and Control

摘　　要：扩大桥型接线在现场中正得到广泛应用,但目前的桥型接线备自投逻辑已经无法满足扩大桥型接线运行方式的运行需要。首先介绍110kV备自投逻辑,通过对110kV扩大内桥接线的主要运行方式的分析,给出了110kV扩大内桥接线备自投的配置,讨论了其备自投应具备的逻辑,同时考虑了备自投逻辑与主变保护的闭锁关系,考虑了开关拒跳的情况,为扩大内桥接线备自投的设计提供参考和借鉴。指出目前应用的进线备自投逻辑中的不足之处:主变保护动作后未判断桥开关已跳开就合上备用电源的开关,并提出应在进线备自投逻辑中增加判断桥开关分位的条件。Enlarging bridge main connection is widely used in 110 kV terminal substations. However, traditional logic conditions of back-up switching equipment are unable to meet its operation. First of all, the paper introduces the logic conditions of 110 kV back-up switching equipment, then presents a solution of configuration of 110 kV enlarging internal bridge back-up switching equipment after analysing main modes in 110 kV enlarging internal bridge main connection, and discusses the logic conditions by considering its cooperation with main transformer protection and the case that circuit breakers refuse trip. The logic conditions discussed in the paper provide reference for its design. At last, the paper indicates the insufficiency of logic conditions widely used in incoming-line back-up switching equipment, i.e. after the action of main transformer protection, circuit breaker of back-up power is put into operation without judging the position of sectional circuit breaker. A solution of adding the logical condition of judging the position of sectional circuit breaker is put forward.

关 键 词：扩大内桥接线 备自投 桥备自投 进线备自投 开关拒跳 

分 类 号：TM762.1[电气工程—电力系统及自动化]