为了区别传统变电站的电缆接线,本文提出了虚端子的概念,并且全站虚端子的连接是利用系统配置器实现的。首先,介绍了虚端子的基本概念;对系统配置器虚端子技术的应用和开发进行了分析,最后简要的阐述了虚端子可视化的功能演示。当全站IED设备间的虚端子连接关系产生变化之后,利用该技术能够清晰地看到全站IED设备虚端子连接关系的所发生的变化,对工程的调试起到一定的指导作用。 In order to distinguish the cable wiring of traditional substations, this paper proposes the concept of virtual terminals, and the connection of all station virtual terminals is realized by using the system configurator. First of all, the basic concepts of virtual terminal are introduced. The application and development of virtual terminal technology of system configurator are analyzed. Finally, the function demonstration of virtual terminal visualization is briefly introduced. When the connection relationship between the virtual terminals in the IED devices of the whole station changes, the change of the virtual terminal connection relationship of the IED devices in the whole station can be clearly seen by using this technology, which plays a guiding role in the commissioning of the project.