Research On Resource Optimization And Configuration Of Power Backbone Communication Network For Energy Internet

Energy Internet(EI)is the trend of the future development and evolution of energy and power systems.It is of great significance to build an EI that uses the power grid as the framework for energy transmission and exchange.As a dedicated communication network for the power system,the power backbone communication network(PBCN)plays a key role in carrying EI services,improving the two-way interaction capability of the energy system,and promoting the development of EI.The existing PBCN of our country has been in operation for many years,and there are problems such as insufficient bandwidth,aging equipment,and a sudden increase in risks.The convergence of the new El services will be carried by PBCN,which will bring more burden to the operation of the existing power communication network.Once PBCN is overwhelmed and fails,it will cause devastating disasters to the operation and control of the EI.Therefore,adjusting the operational configuration strategy of PBCN to better carry the EI service is of great value.So this paper proposes corresponding configuration algorithms to optimize the operation and configuration of PBCN.The main research contents are as follows:In view of the bandwidth bottleneck problem of power backbone communication network caused by the non-uniform distribution of Energy Internet communication services,a balanced routing and protection optimization algorithm are proposed.The service balance factor is first set according to the ratio of the work and total communication capacity,and the improved Dijkstra routing algorithm based on service balance is proposed.Then,based on the efficient link protection P-cycle algorithm,an integrated protection algorithm for the generation and configuration of P-cycle without candidate cycle enumeration considering the link capacity constraint is proposed.Establish a mixed-integer linear programming(MILP)model to configure the protection channel of PBCN.Finally,combined with the service requirements of the El and PBCN,a split mechanism of the P-cycle is designed to limit the length of the P-cycle and reduce the communication delay.The problem of insufficient bandwidth caused by El services carried in PBCN is solved through the selection of service balance factors and the configuration of the link protection P-cycle.In view of the bandwidth bottleneck problem of PNCN caused by aggregation distribution of EI communication services,a protection bandwidth optimization algorithm is proposed.An equipotential path P-cycle generation algorithm is proposed that uses aggregation nodes as the center to divide the potential value of the communication station.Based on parameters such as the path length of El service and the position relationship between the path and the P-cycle,we evaluate the protection performance of the equipotential path P-cycle for EI services.An equipotential path P-cycle configuration algorithm is first designed based on MILP.Then,a heuristic algorithm is proposed to realize the dynamic configuration of the equipotential path P-cycle.On this basis,the constraint conditions are formulated according to the relevant specifications of PBCN.The influence of the path length limitation on the capacity of PBCN is analyzed,and the influence of the service balance factor on the capacity of PBCN is also evaluated.In view of sharing risk link problem caused by cross-layer mapping and complex interaction of EI service,a service protection optimization algorithm is proposed.The position relationship between the members of the shared risk link group and the link P-cycle is classified and modeled.Based on the mixed-integer programming model,an integrated algorithm for generating and configuring the optimal P-cycle without candidate cycle enumeration considering the service sharing risk is proposed.And linearize the model to improve the efficiency of the algorithm.Based on different service requirements,two different optimization strategies of independent optimization and joint optimization of service routing and P-cycle protection of the EI are realized under the condition of shared risks,it analyzes the influence of the number of shared risk link groups on the configuration of El service paths.In view of the high-reliability requirements of El service,the double failures of the service are studied,multi-path disjoint routing allocation algorithm and bandwidth sharing optimization algorithm are proposed.The ability of PBCN to resist double failures is analyzed using Menger’s theorem considering the actual situation of the topological connectivity of PBCN.Taking double-link failures as an example,design a topology enhancement algorithm to make PBCN capable of resisting double faults by adding new links.For the enhanced PBCN topology,a link disjoint multi-path routing allocation algorithm based on path parameter estimation is proposed.This algorithm can allocate 3 or more routes for each El service,and ensure that these routes are disjoint,it can effectively deal with the double link failures of PBCN.For services with sharable link bandwidth,an algorithm for optimal sharing of capacity between EI services is further designed to reduce the redundancy of communication channels.