论电力变压器后备保护配合研究  

Study on the Power Transformer Backup Protection

作　　者：杨林涛[1] 尹莉欣 

机构地区：[1]国网山西省电力公司,太原030001

出　　处：《电力与能源》2017年第2期208-211,共4页Power & Energy

摘　　要：电力变压器是供电网络中不可缺少的重要设备,联络着输电线路与配电网络,在发电、输电、配电环节中起着提高电压以便于远距离输送以及降低电压给负荷供电的关键作用。其可靠、稳定性、安全性和稳定性直接决定着整个电网的安全性和稳定性。因此需要根据变压器的容量,电压等级、负荷性质等因素选择适合的保护配置,在分析变压器后备保护不能可靠动的原因的基础上,提出了后备保护所应改善的方向,并提出了其在后备保护中的整定方案。Power transformer is an indispensable equipment in the power supply network. It connects with the distribution networks and the transmission lines, and plays a key role in power generation, transmission and distribution in order to increase the voltage for long-distance transmission and reduce supply voltage to the load. Its reliability, stability, and security directly determine the overall security and stability of the grid. Therefore, it is required to select appropriate protection configuration according to the transformer capacity, voltage level and load factors. This paper, based on the analysis of multiple reasons on why transformer back- up protection cannot reliably operate, points out a direction to improve backup protection and proposes a tuning plan in the backup protection.

关 键 词：后备保护 三段式 灵敏度 复压闭锁 

分 类 号：TM772[电气工程—电力系统及自动化]