基于报文信息标签的智能变电站通信服务策略

智能变电站是建设智能电网的重要基础和支撑。随着通信技术的进步,人们开始研究在智能变电站通信网络的设计中采用共网方案。这种方案在提高网络效率的同时也对通信的实时性和可靠性提出了挑战。针对以上问题,首先,分析共网方案下网络拥塞现象产生的原因及其对报文传输产生的影响。然后,提出基于报文信息标签的通信服务策略。该策略通过制定报文信息标签及流量监测的方式对报文进行分类识别和过滤,通过基于有最低延迟队列的定制长度加权轮询的通信调度方法实现对各类型报文的区分服务。仿真结果表明,该策略可有效地识别并丢弃伪装的大流量错误报文,避免了网络拥塞造成的重要报文传输超时和丢失,并降低了其他报文的传输时间。

Communication Service Strategy of Smart Substation Based on Message Information Label

Smart substation is the important base and support for the construction of smart grid. With the development of communication technology, the scheme of shared-network in the design of smart substation communication network has recently been studied. This scheme not only improves the efficiency of the network, but also brings about challenges for the real-time and reliability of communication. To cure the above problems, the cause and the influence on message transmission of congestion situation in the scheme of shared-network are analyzed firstly. Then, a comprehensive communication service strategy based on message information label is put forward. The information of message information label and flow amount monitoring are used to identify and filter massages. The identification services for all kinds of message are realized by the communication scheduling method based on the custom length weighted round robin based least lag queue(CLWRR-LLQ). The simulation results shows that the scheduling strategy can identify and discard the camouflaged false message with big flow amount, avoid the timeout and loss in transmission of important messages caused by network congestion, and reduce the transmission time of other messages.