改进流量性能的高可用性无缝冗余在变电站通信网中的应用

摘要

高可用性无缝冗余(high-availability seamless redundancy,HSR)在工业控制网络中得到广泛的应用,但复制帧会在网络中循环并转发回源节点,产生不必要的流量,这使得网络性能降低,引起网络拥塞或中断。为此,提出一种快速消除方法(quick removing,QR)来解决这个问题,当所有网络节点都已经收到发送帧的复制帧,在将要接受下一个复制帧时,将复制帧从网络中移除。通过计算,该方法能有效减少标准 HSR 网络中的多余流量,在极限情况下,可以减少近50%的多余流量。最后,用改进流量性能的 HSR网络,建立起高可靠性的数字化变电站通信网络。%High-availability seamless redundancy is widely used in industrial control network but copy frames may be recycling in the network and returning to the originating node which is probably producing unnecessary flow,reducing network per-formance and causing jam or break-off of the network.Therefore,this paper proposes a kind of quick removing method to solve this problem that is to remove copy frames from the network when all network nodes have received copy frames of transmit frames and are going to accept another copy frame.By calculating,it proves that this method is able to effectively reduce redundant flow in standard HSR network and in limiting case,it is able to reduce about 50% redundant flow.Finally, by using HSR network with improved flow performance,it discusses establishment of high-reliability digital substation com-munication network.