面向智能变电站二次设备的网络报文管控技术

Network Packet Control Technology for Secondary Equipments in Smart Substation

随着智能变电站以太网应用往混合组网、多网共口的方向发展,网络的安全稳定性对于智能变电站设备可靠运行至关重要。文中深入研究了电力二次设备在多种报文共网共口条件下接收与发送的优化处理机制。在接收方向上针对变电站网络风暴条件下的报文特点,提出多级过滤、分组流量控制的方法实现网络风暴抑制,保证了正常报文的接收与处理;在发送方向上提出以优先级划分为前提的优化调度发送策略,保证了报文发送的实时性并充分利用了网络带宽。同时,基于纯硬件片上系统实现了上述机制的实际应用与测试,有效提升了智能变电站二次设备网络通信的稳定性与可靠性。

With the application of the Ethernet tending to be hybridized in networking in smart substation and packets in multiple protocols existing in the same network,the security and stability of the network has become the crucial point for the reliability of smart substation equipments.The optimization of network packets in two directions of sending and receiving is studied.That is,according to the characteristics of packets in smart substation network,packet flow control in groups and the multi-stage filtering in the receiving direction is put forward to suppress network packet storms and processing normal packet effectively;while in the sending direction,an optimization scheduling strategy based on packet priority classification is used to get the real-time performance and make full use of network bandwidth.Meanwhile all the strategies in this paper are implemented on the SoC hardware system,the test results showing that the stability and reliability of network communication in smart substation equipments is effectively improved.