Applied Technology Research On Wide-area Monitoring In Energy Internet

Employing Software Defined Network (SDN) technology to investigate wide-area monitoring system in energy Internet is of great significance. In the paper, the architecture of Wide-area Monitoring System (WAMS) communication system based on SDN is proposed to meet the requirement of WAMS communication network. In addition, this paper solves the problem about the deployment of SDN controllers in the power grid, which provides theoretic methods to deploy the controllers in WAMS communication network.Firstly, a architecture of WAMS is proposed. This paper analyzes the demands of WAMS for communication networks from the aspects of multi-service extension, real-time, security and reliability, and proposes the challenges of traditional communication networks. Then, the characteristics and the advantages of SDN is analyzed in network application to meet the performance requirements of WAMS communication network. Therefore, under the advantages of SDN date and control separation, a WAMS communication network architecture based on SDN is proposed. In particular, the paper describes the design of WAMS network from two parts: logical deployment and network topology. And then, simulation platform for Multi-controller network is built. Finally, the simulation results and the qualitative analysis verify the reliability and security advantages of the architecture in WAMS communication network, which proves that the proposed architecture can meet the communication requirements of WAMS network.Secondly, the problem about the deployment of SDN controllers in the power grid is solved. In order to solve the problem caused by multi-controller deployment mode in WAMS communication network,this paper puts forward multi-objective optimization with constraints problem after an analysis of all the four aspects of network cost,transmission delay, control synchronization delay and traffic balance.Then the Particle Swarm Optimization (PSO) algorithm is used to get the solution set of the multi-objective optimization problem. In addition, the optimal solution among the solution set is obtained by using the fuzzy criterion, which means that the problem of SDN controller deployment in the power communication network is solved. Finally, the practical power network topology verifies the validity of the above model.