Research On Capacity Expansion And Protection Strategy Of Power Communication Network Based On Complex Network

As the basic network for the safe and reliable operation of the smart grid system,the power communication network must ensure its reliability and improve its vulnerability.If the equipment in the communication network fails,the entire network system may not operate normally.Therefore,there is an urgent need to improve the vulnerability of the power communication network,which can realize efficient and reliable operation of the power communication network.So far,the method to improve the vulnerability of the network is mainly considered from two aspects.On the one hand,based on the topology of the network,we can develop a strategy which is used to improve the topology of the entire network,so as to improve the vulnerability of the network;on the other hand,based on the service and route optimization,we can develop a reliable route optimization strategy is adopted to distribute services.So as to avoid network congestion and result in network paralysis.This paper abstracts and simplifies the power communication network by corresponding principles,so as to analyze and optimize the performance of the network to verify the effectiveness of the optimization strategy.First of all,in this paper,we introduce the typical model and network characteristic parameters of complex networks in detail.Based on the complex network theory,we construct the physical model of the power communication network.by adopting some physical criteria.Then,based on the network topology level,we propose an edge-adding strategy that takes into account the node KPI indicators and considers the median performance of the node.The performance of the network under RA,LDA and LD_CA three different capacity expansion strategies is highlighted,which highlights the advantages of the LD_CA strategy.At last,based on the routing level,we propose an efficient route optimization strategy—Off_hub routing policy,which is different from the traditional routing strategy,the traditional routing strategy may cause information overload on key nodes in the network so as to cause network congestion.The Off hub routing policy is based on the real-time status of the network when routing.In order to avoid much business information flowing through key nodes and cause network congestion.The final simulation results show that the combination of LD_CA strategy and Off_hub routing strategy can not only improve the capacity of the network,avoid network congestion,but also improve the vulnerability of the network.When node random failure and specific area attacks occur in the power communication network,the network can still maintain certain connectivity.The optimization strategy proposed in this paper can provide a basis for future power communication network planning,and achieve upgrade and transformation of the power communication network in a better way.