浅析变电站扩建工程中电压互感器并列回路二次接线的改进措施

摘要

In the transformer substation expansion project,the same voltage levels of bus for expansion and bus section,at present the new the bus voltage transformer there are two main secondary windings, original bus voltage transformer is only one main secondary winding,set measurement,measurement and protection in a body. The conventional voltage coordinate switching device,its voltage coordinate loop can't satisfy in station voltage transformer and coordinate install a main secondary windings and two main secondary windings of the bus voltage circuit needs. This paper focuses on the application of voltage switching equipment for voltage transformer secondary coordinate principle and bus voltage coordinate condition to carry on the thorough analysis,and from a practical point of view to take strategy,increases must latching relay,improvement effect is ideal,to solve the voltage transformer secondary coordinate problem has important practical significance,it is worth popularization and application in the same type of transformer substation in expansion project.%　　在变电站的扩建工程中，同一电压等级的母线因扩建而将母线分段，目前新加装的母线电压互感器都有两个主二次绕组，原有的母线电压互感器只有一个主二次的绕组，集计量、测量以及保护于一体。常规的电压并列切换装置，其电压并列回路不能满足站内电压互感器同时并列安装一个主二次绕组与二个主二次绕组的母线电压回路的需求。主要对应用电压并列切换装置进行电压互感器二次并列的原理及母线电压并列的条件进行了深入分析，并从实用的角度采取策略，增加必须的闭锁继电器，改进效果理想，对解决电压互感器二次并列的问题具有重要的现实意义，值得推广应用于同类型的变电站扩建工程中。