一种通用的基于软硬件结合的电力系统远动双机切换方法

Research and practice of sequential operation in substation

针对在变电站自动化系统中,用户对远动双机切换的需求,提出了一种新型切换方式,其将软件和硬件相结合,在多种系统平台上实现双机双通道或者双机单通道的切换。其原理是利用变电站的间隔层进行主、备远动机之间信息的交换,主、备远动机各自判断自己的通道状态及对侧机通道的状态,决定是否进行切换。该切换方式无需考虑具体的物理通信介质,其切换条件可方便地用软件设置和更改,配置方式灵活且可降低成本。详细介绍了方案的具体实现过程,并给出了程序流程图。该切换方式已在山西500kV晋中变电站中投入使用,效果良好。

According to requirements of the customer for remote communication server changeover of substation automation system,a new method is presented,which integrates SW（SoftWare） and HW （HardWare） to implement mono-or dual-channel changeover of two communication servers on multi -system platforms. With the information exchanged between the main machine and the standby machine through the bay level of the substation,each machine judges channel states of itself and the opposite,and then decides to perform switching or not. The physical communication media is transparent to it and changeover conditions can be set and modified flexibly by software,with merits of flexible configuration and low cost. The detailed realization procedure is provided and the program flowchart is given. The changeover method has been applied in Shanxi Jinzhong 500 kV substation with good effect.