面向智能变电站通信网络可靠性研究

智能变电站通信系统故障时的零恢复时间和零数据帧丢失问题,传统的冗余机制无法解决。针对这一问题,以智能变电站通信网络的可靠性为研究对象,提出一种并行冗余协议和高可用性无缝环网协议相结合的系统模型。建立站控制层使用并行冗余协议,过程层使用高可用性无缝环网协议的模型,通过可靠性框图和成功流法进行可靠性评估。通过算例验证了所提方法的可行性。结果表明,所提方法能有效地提高通信网络的可靠性,为智能变电站的发展提供了参考和借鉴。

Research on a reliability evaluation method of a communication network for an intelligent substation

The traditional redundancy mechanism cannot be realized when there are problems of zero recovery time and zero data frame loss in the communication system of an intelligent substation. This paper takes the reliability of a communication network of intelligent substations as the research object, and proposes a system model combining a parallel redundancy protocol and a high availability seamless ring network protocol. A model is established by using a redundancy protocol in the station control layer and the ring network protocol in the process layer. The reliability is evaluated by a reliability block diagram and the success flow method. The effectiveness of the method is verified by an example. The results show that the method can effectively improve the reliability of the communication network and provide a reference for the development of an intelligent substation. This work is supported by the Science and Technology Project of State Grid Corporation of China (No. 5216A0180003) and the Science and Technology Project of State Grid Hunan Electric Power Co., Ltd. (No. 5216A5180016).