Application of ${p}$-Cycle Protection for the Substation Communication Network Under SRLG Constraints
Application of ${p}$-Cycle Protection for the Substation Communication Network Under SRLG Constraints
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DOI：
10.1109/tpwrd.2014.2358571
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发表时间：
2014-12
影响因子：
4.4
通讯作者：
Bin Li;Jiao Yang;Bing Qi;Yi Sun;Huaguang Yan;Songsong Chen
中科院分区：
文献类型：
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作者：
Bin Li;Jiao Yang;Bing Qi;Yi Sun;Huaguang Yan;Songsong Chen
为了提高智能变电站通信网络的安全性和稳定性，考虑到变电站不同链路和相关纤芯的多样性，提出了一种新的共享风险链路组（SRLG）加权p圈算法（SWCA）。该方法通过共享风险分析来解决多故障问题。为了降低SRLG约束下带宽分配优化问题的复杂度，提出了混合整数线性规划和启发式算法。研究了动态业务环境下的带宽利用率、业务拒绝率和保护资源冗余度等性能，并讨论了最佳SRLG数。实验结果表明，SWCA可以保留更多的带宽，从而可以在牺牲保护冗余的情况下满足更多的业务请求。与经典的容量约束迭代设计算法-增长法和最短路径对保护法相比，完全分离的SRLG保护可降低工作路径和保护路径同时失效的概率，从而提高变电站通信网络的生存性。同时，该方法可以恢复智能变电站通信网络中的多个故障，从而提高电力通信网络的生存能力。
In order to improve the security and stability of the intelligent substation communication networks, a novel shared risk link group (SRLG) weighted p-cycle algorithm (SWCA) is proposed by considering the diversity of different substation links and the associated fiber core. The proposed approach is dedicated to solve the problems of multiple failures by sharing risk analysis. Hybrid integer linear programming and heuristic algorithm implementation are presented to reduce the complexity of optimizing bandwidth allocation under SRLG constraints. The performance of bandwidth utilization, service reject rate, and protection resource redundancy is investigated under the dynamic traffic environment, and the optimum SRLG number is discussed. The experimental results from two demonstration networks with randomly set SRLGs show that SWCA can reserve more bandwidths and, therefore, more service requests can be served at the expense of protection redundancy. Completely separated SRLG protection will decrease simultaneous failure probability of the working path and protection path and, thus, improve the survivability of the substation communication network compared with the classical capacitated iterative design algorithm-grow and shortest path pair protection method. Meanwhile, the approach can restore multiple failures within intelligent substation communication networks, and can therefore enhance the survivability of the electric power communication network.