简述变电所开关柜控制回路优化的必要性  

Description the Necessity of Optimizing the Control Circuit of Substation Switchgear

作　　者：刘启超 纪强 Liu Qichao;Ji Qiang(Industrial Department of Energy,Shougang Shuicheng Iron&Steel(Group)Co.,Ltd.,Liupanshui 553028,Guizhou,China)

机构地区：[1]首钢水钢能源事业部,贵州六盘水553028

出　　处：《水钢科技》2023年第3期7-10,共4页Shuigang Science & Technology

摘　　要：SF6气体通俗地说二次回路是一种电路,它是由互感器二次绕组的出线以及控制信号回路,根据设计的标准相互连接而成的,也叫做二次接线。二次回路在电网中虽非主体,但它在保证电力生产的安全,向用户提供合格的电能等方面却起着举足轻重的作用,二次回路的故障常会破坏或影响电力生产的正常运行。如若某变电站差动保护的二次回路接线有错误,则当变压器带的负荷较大或发生穿越性相问短路时,就会发生误跳闸。若线路保护接线有错误,一旦电网发生故障,则可能会使断路器该跳闸的不跳闸,不该跳闸的却跳了闸,结果轻者造成设备损坏,重者使电网发生瓦解事故。同样若测量回路有问题,就将影响测量的准确性,结果造成运行调整的盲目并难以判断电能质量是否合格,同时也会因计量的不准,造成对用户的电费少收或多收,直接影响企业的经济效益。Generally speaking,the secondary circuit of SF6 gas is a kind of circuit,which is connect ed by the outgoing line of the secondary winding of the transformer and the control signal circuit ac cording to the design standard,also known as the secondary wiring.Although the secondary circuit is not the main body in the power grid,it plays an important role in ensuring the safety of power produc tion and providing qualified power to users.The fault of the secondary circuit often destroys or affects the normal operation of power production.If the wiring of the secondary circuit of the differential pro tection in a substation is wrong,when the load of the transformer is large or the through short circuit occurs,the false trip will occur.If the line protection wiring is wrong,once the power grid fails,the circuit breaker that should trip may not trip,but the one that should not trip will trip.This can cause equipment damage and even lead to the collapse of the power grid.Similarly,if there is a problem in the measurement circuit,it will affect the accuracy of the measurement,resulting in blind operation adjustment and difficult to judge whether the power quality is qualified,but also due to inaccurate measurement,resulting in less or more electricity charges for users,directly affecting the economic benefits of enterprises.

关 键 词：综合保护装置 开关柜控制回路 分合闸线圈 电阻电容 继电器 

分 类 号：TM7[电气工程—电力系统及自动化]