Routing Design Of Communication Network For The Frequency Stability Of The Power Grid

Frequency is an important indicator to evaluate the power quality of the power grid and the security and stability of the power system.The power grid transmits power information through the communication network in time to ensure the dynamic balance between the power generation and the power load demand,and stabilize the frequency of the power grid.With the continuous development of smart grid,power communication network has developed into a complex multi-level network connecting power utilities and thousands of intelligent electronic devices.Therefore,it is necessary to design the corresponding routing algorithm for the power communication network to stabilize the power grid frequency according to the characteristics of network communication at different levels and specific requirements.Based on the detailed analysis of the layered communication network technology of smart grid,this paper focuses on the following contents:(1)In the smart grid wide area network communication network,in order to meet the demand for low delay in transmission of demand response(DR)control commands to smart devices,a multicast routing algorithm is proposed which comprehensively considers the DR capability,communication delay and bandwidth of the smart grid.The simulation results show that this algorithm can effectively reduce the wide area control delay,and can effectively improve the problem of power users’ demand response with large DR capacity.(2)In the smart grid wireless neighborhood network communication network,in order to improve the coverage of network communication,this paper proposes a Lo Rabased neighborhood network resource access and address allocation mechanism RANLo Ra,and further designs a hierarchical routing scheme based on RAN-Lo Ra.The simulation results show that RAN-Lo Ra can effectively extend the maximum communication distance of the network,improve the access rate of terminal nodes,significantly reduce the packet loss rate of data transmission in the wireless neighborhood network,and guarantee the communication reliability of the smart grid wireless neighborhood network.Based on the above research contents,for the validation of the proposed routing algorithm in the field of communication time delay change influence on grid frequency,set the grid frequency simulation model of control system,different wide area network multicast routing is studied the influence of time delay performance of power grid frequency,the grid communication network model under different multicast routing the influence of time delay and the changes of power grid frequency and neighborhood area network layer routing influence on grid frequency.The above modeling and system test results provide a certain reference for the routing design method of stabling power grid frequency.