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

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。

HW & SW-based communication server changeover in substation automation

Basic conditions for the sequential operation of substation are discussed,and a tech-nical plan is presented for substation automation system to realize cell operation at cell level and cross-cell operation at station control level.The safety mechanism in sequential operation process is analyzed,and the main criteria for ensuring operational safety are put forward.Suggestions are given for the sequential operation of whole substation,the change of protection operation mode during sequential operation and the restriction in communication protocol between substation and control centre.The intelligent HV electrical equipment and control system and the improvement of operation mode of substation are required for the development of electrical network.