电力SDN通信网中面向负载均衡的路由重构

在通信网络发生故障时，为确保路径可靠性与网络负载均衡的统一，由于软件定义网络（SDN）的通信网络体系在电力通信网中已具可行性，故结合SDN逻辑集中式架构下路由快速收敛的特点，构建了路径重构模型，并采用业务路由重构算法求解.首先依据业务紧急程度、端到端通信时延、带宽需求及对电网实际运行的影响程度等因素将业务分为不同的优先级；然后以链路可用度最大为目标，以业务时延、站点等级差等为约束建立模型，以流量标准差、业务恢复率为评价指标，并在IEEE14母线系统上进行测试验证.仿真结果表明，所提算法在保证业务性能的同时具有更低的流量标准差和站点等级差，能有效实现路径重构，并确保负载均衡.

Rerouting Algorithm for Load Balancing in SDN-Enabled Smart Grid Communication Network

The software defined networking (SDN) enabled architecture is becoming an effective communication method for smart grids. To achieve load balancing and fast recovery in smart grids in case of failures, the services are firstly divided into different levels according to requirements of service latency, bandwidth and impact on the smart grid operation. Then, a mathematical model is formulated for maximizing of the link availability with the constraints of service requirements and substation level difference. Thirdly, the service rerouting algorithm for load balancing (SRALB) is exploited to solve it. Finally, this scheme is verified in IEEE14 system, and it is demonstrated that the proposed algorithm not only guarantees better performance for services but also has lower standard deviation and substation level difference than the existing algorithms.