“N-2”方式线路备自投装置研制  

Development of " N -2" Mode Line Standby Automatic Switching Device

作　　者：吕喜元 肖金祥 张文平 LV Xiyuan;XIAO Jinxiang;ZHANG Wenping(State Grid Qingyang Power Supply Company,Qingyang 745000,China)

机构地区：[1]国网庆阳供电公司,甘肃庆阳745000

出　　处：《电工技术》2022年第5期162-166,169,共6页Electric Engineering

摘　　要：随着社会对供电可靠性要求的进一步提高,电网的网架结构不断得到加强,单线路链式供电方式逐渐增强为辐射状双回线供电,但即使是双回线供电,也存在全站失压的风险,且失电后恢复供电的时间较长,影响范围广,风险不容忽视。针对以上问题,有效利用网架优势来降低双回线的安全风险,用第三条线路作为备用电源,并研发“N-2”方式线路备自投装置来代替人工,自动完成逻辑动作,达到快速恢复供电的目的。With the further improvement of the society′s requirements for power supply reliability,the grid structure of the power grid has been continuously strengthened,and the single-line chain power supply mode has gradually evolved into a radial double-circuit power supply.However,even with double-circuit power supply,there is still the risk of voltage loss in the whole station,and it takes a long time to restore the power supply after the power loss,and the impact range is wide,and the risk cannot be ignored.In view of the above problems,the advantages of the grid is effectively used to reduce the safety risk of the double circuit line,and the third line is used as the standby power supply.The"N-2"mode line is developed to replace the manual operation with an automatic switching device,which automatically completes the logical action and achieves the purpose of quickly restoring the power supply.

关 键 词：备自投装置 双回线供电 “N-2”方式 备用电源 动作逻辑 

分 类 号：TM76[电气工程—电力系统及自动化]