【作者】 刘林；

【导师】 祁兵；

【作者基本信息】 华北电力大学(北京) ， 电气工程， 2021， 博士

【摘要】 能源互联网是能源电力系统今后发展演化的方向,构建以电力网络为骨架进行能源传输和交换的能源互联网具有重要意义。电力骨干通信网作为电力系统的专用通信网络,对于承载能源互联网业务,提升能源系统的双向交互能力,促进能源互联网的发展起到推动作用。我国现有的电力骨干通信网已投运多年,存在带宽不足、设备老化等问题,有效性和可靠性有待提升。能源互联网新业务汇聚后通过电力骨干通信网进行承载,将会给现有电力骨干通信网的运行增加更多负担。一旦电力骨干通信网不堪重负,发生故障,将会给能源互联网的运行控制造成毁灭性灾难。因此,调整电力骨干通信网的运行配置策略,使其更好地承载能源互联网业务,具有十分重要的价值。本文提出相应的配置算法对电力骨干通信网的运行配置进行优化,主要研究内容如下:针对能源互联网通信业务非均匀分布导致的电力骨干通信网带宽瓶颈问题,提出均衡路由和保护优化算法。先依据工作带宽占用总带宽的比率设置业务均衡因子,提出基于业务均衡的改进Dijkstra路由算法。然后以高效链路保护P圈算法为基础,提出计及链路带宽约束的无备选圈链路保护P圈生成配置一体化算法,建立混合整数线性规划模型,对电力骨干通信网的保护通道进行配置。最后结合能源互联网及电力骨干通信网的业务需求来设计P圈的分裂机制,满足P圈长度的限制,降低通信延时。通过业务均衡因子的选择和链路保护P圈的配置来缓解能源互联网业务通过电力骨干通信网承载造成的带宽不足问题。针对能源互联网通信业务呈汇聚型分布导致的电力骨干通信网带宽瓶颈问题,提出一种保护带宽优化算法。提出了以汇聚节点为中心进行通信站点势值划分的等势路径P圈生成算法,分别基于能源互联网业务的路径长度及路径与P圈的位置关系等参数,合理评估等势路径P圈对能源互联网业务的保护性能。先基于混合整数线性规划设计最优化等势路径P圈配置算法,然后基于启发式算法设计等势路径P圈动态配置算法来提升求解效率。在此基础上,根据电力骨干通信网相关规范制定约束条件,分析路径长度限制对电力骨干通信网容量的影响,评估业务均衡因子对电力骨干通信网容量的影响。针对能源互联网业务跨层映射和复杂交互而导致的共享风险链路问题,提出一种业务保护优化算法。对共享风险链路组成员与链路保护P圈的位置关系进行分类建模,基于混合整数规划模型,提出了一种计及共享风险情况下的无备选圈链路保护P圈生成和配置一体化算法,并对该模型进行线性化处理,以提升算法的求解效率。基于不同的业务需求,在共享风险的情况下,实现能源互联网的业务路由与P圈保护独立优化、联合优化两种不同的优化策略,分析了共享风险链路组的数量变化对能源互联网业务路径配置的影响。针对能源互联网业务的高可靠性需求,对业务的双重故障问题进行研究,提出了多路径不相交路由分配算法和带宽共享优化算法。计及电力骨干通信网的拓扑连通度等实际情况,利用门杰尔定理对电力骨干通信网抗双重故障的能力进行分析。以双链路故障为例,设计电力骨干通信网拓扑增强算法,通过新增链路,使得电力骨干通信网具备抗双重链路故障能力。对增强之后的电力骨干通信网拓扑,提出一种基于路径参数预估的链路不相交多路径路由分配算法。该算法可以为每个能源互联网业务分配3条及以上路由,并确保这些路由是链路不相交的,从而有效应对电力骨干通信网的双链路故障。针对可共享链路带宽的情况,进一步设计了能源互联网业务间链路带宽最优共享算法,降低通信通道的冗余度。更多还原

【Abstract】 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.更多还原