摘要
电力系统零序网络的稳定性直接影响到继电保护定值的灵敏性和选择性,是继电保护安全可靠运行的基础。电力系统零序网络主要由输电线路和中性点直接接地的变压器两类设备构成。研究提出了综合运用输电线路的自动重合闸技术和变压器中性点接地刀闸的自动切换控制技术,可以确保设备跳闸后以最快的速度恢复电力系统的零序网络,是电力系统零序网络的最优控制技术。分析总结了输电线路的自动重合闸技术,研究开发了变压器中性点接地刀闸的自动切换控制装置,其性能已经在现场运行中得到检验和验证,具备推广应用的条件。
The sensitivity and selectivity of electronic protection relay’s constant value is directly influenced by the power system zero-sequence network’s stability, which is the foundation of safe and reliable operation of the relay protection. Zero sequence network topology is formed by transmission line and directly-grounding neutral point of transformer. Analysis shows that the integrated use of automatic reclosing of the transmission line and automatically switching grounding neutral point of transformer will ensure the equipment after tripping can resume the zero sequence power system networks as soon as possible. This technology is the optimal control technology of the zero sequence power system networks. In the following, it summarizes the automatic reclosing technology of transmission lines, researches the technology of automatic switching the grounding neutral point of transformer, and develops the corresponding control device. Device performance has been tested in actual operation and verification, which meets the application requirements.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2016年第18期152-156,共5页
Power System Protection and Control
关键词
继电保护
零序网络
最优控制
自动重合闸
变压器中性点刀闸
自动切换
relay protection
zero-sequence network
optimal control
automatic reclosing
transformer neutral point knife switches
automatically switching