一种跨电压备自投的设计与应用  

A Design and Application of a Cross-Voltage Spare Power Source Automatic Switch

作　　者：陈威 马翰文 杨宽 CHEN Wei;MA Hanwen;YANG Kuang(NR Electric Co.,Ltd.,Nanjing 211100,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211100

出　　处：《电工技术》2025年第1期149-151,共3页Electric Engineering

摘　　要：目前某些地区还有一些存量变电站的高压侧为单母线接线,只有单路或双路进线,且低压侧存在水电站等电源线路和与其他变电站之间的联络线接入,电网结构薄弱,可靠性较差。当变电站进线因线路故障导致对侧或本侧开关跳开后将造成高压侧母线失压,水电间隔水电站侧因配备频率电压紧急控制设备完成了解列,低压侧负载线路也将失电,进而造成全所失电。传统方式需要人为倒负荷操作或等故障排除后再投上35kV进线方能恢复电力供应,停电时间长,影响供电稳定性。为了缩短负荷线路停电时间,对该类型变电站运行方式做了场景分析,研究出跨电压备自投的设计方案,并对不同场景的备自投动作方案进行模拟,实现了正确、快速的主备供电源之间的切换,加强了电力系统灵活调节能力。At present,there are some stock substations in some areas,the high-voltage side is a single bus connection,only a single or double route,and the low-voltage side has power lines such as hydropower stations and the connection line between other substations,and the grid structure is weak and the reliability is poor.When the switch on the opposite side or the local side of the substation is switched off due to a line fault,the high voltage side of the bus will lose voltage,and the frequency and voltage emergency control equipment will be equipped to complete the understanding of the hydropower station side of the hydropower station,and the load line on the low voltage side will also lose power,resulting in a total loss of power.In the traditional way,the power supply can be restored only when the load is reversed or the fault is removed and then put on the 35 kV input line.The power failure time is long and the power supply stability is affected.In order to reduce the load line outage time,the scenario analysis is made for the operation mode of this type of substation,and the design scheme of cross-voltage backup and self-dispatching is studied,and the backup and self-dispatching action scheme of different scenarios is simulated,so as to realize the correct and fast switching between the main and standby power supply sources and strengthen the flexible adjustment ability of the power system.

关 键 词：跨电压 主备供电源 备自投 

分 类 号：TM76[电气工程—电力系统及自动化]