电力系统光纤线路进行检修、改造或因极端情况导致光纤中断时，会使电力系统通信业务中断。基于剩余完好网络快速构建一条迂回路径可保证广域网通信业务正常进行。以通信总时延最短和流量均衡为最优目标，寻找广域通信迂回路径。着重考虑需转移的数据流入备选信道后，对备选信道内数据排队时延的影响。将信道带宽倒数、信道长度和信道利用率三者的加权和作为信道权重指标。在可用预迂回路径表下，以路径总权重最小为寻优目标，执行改进 Dijkstra 算法选择最优迂回路径。最后通过 OPNET 通信仿真软件对所选最优迂回路径的实时性和流量均衡性进行验证。%When the fiber optic lines of power system are repaired, transformed or destroyed by some emergencies, communication businesses will be suspended. Based on the rest of undamaged network, quickly reconstructing one circuitous path can keep communication businesses of wide area network working. The optimal circuitous path whose delay is shortest and traffic is balanced is searched in this paper. The effect that transferred data caused on the queuing time of alternative channel is considered emphatically. The sum of each channel’s bandwidth reciprocal value, length and utilization rate is considered as weighted index of channel. The path’s minimum weighted value is the optimal target. The improved Dijkstra algorithm is performed to get the optimal circuitous path in the useful circuitous path chart. Finally, OPNET is used to test the instantaneity and traffic’s balance of the chosen optimal path.
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