Risk-Aware Service Routes Planning for System Protection Communication Network in Energy Internet

Energy Internet (EI) is the advanced stage of smart grids (SG). To guarantee collaborative operations of subsystems in EI, it requires the assistance of high-performance system protection communication network (SPCN). As an emerging networking paradigm, software-defined networking (SDN) is applicable to the communication architecture construction of SPCN due to the advantage of rapid routing convergence owing to the global topology of SDN controller and logical centralized architecture. With the purpose of continuous transmission for services and stable operations of EI, dual routes are urgent to be pre-planned so that fast switching can be achieved from a failed primary route to an alternate route for interrupted services. However, it is a challenge to balance service end-to-end delay and the network operation risk for the existing routing strategies. In light of few studies combining network risk with service QoS, we propose a novel risk-aware routes planning mechanism (RSRM) to reduce network risk as well as guarantee critical service performance of SPCN. The mechanism is based on solving the bi-objective problem to minimize the effect of network risk and potential delay of routes simultaneously. The formulated problem is NP-hard, so a multi-objectives computational intelligent approach is exploited. Simulation results demonstrate that our method effectively reduces the balancing risk of the network and obtain the minimal total end-to-end delay in comparison with other algorithms.