摘要
文章根据线路-变压器组的接线特点,进行了继电保护配置设计.并利用差动保护和变压器非电量保护出口做下级快切装置的保护启动,此举能有效避免"晃电"事故发生,最大限度地提高系统供电可靠性;利用线路-变压器组低后备保护出口做快切装置的保护闭锁,此举又能给快切装置提供闭锁功能,防止备用电源合到故障母线上,避免停电事故扩大化.
According to the wiring characteristics of line transformer group,the confi guration design of relay protection is carried out in this paper.The differential protection and non electric quantity protection outlet of transformer are used to start the protection of the lower level fast switching device,which can effectively avoid the occurrence of“power swing”accident and maximize the reliability of power supply of the system;the low backup protection outlet of line transformer group is used to lock the protection of the fast switching device,which can provide the locking function for the fast switching device and prevent the backup power from closing to the fault bus To avoid the expansion of power failure.
出处
《电力系统装备》
2020年第10期81-83,共3页
Electric Power System Equipment
关键词
线-变组保护配置
避免"晃电"
提高供电可靠性
line transformer protection confi guration
avoid“fl icker”
improve power supply reliability
