Research On Data Communication Technology In Distributed Power Grid

As a new power supply technology,distributed power generation technology has been more and more widely used.To take the micro-grid power supply,both independent of the user's power supply can also be coordinated with the traditional large power grid for the user power supply.Micro-grid with a small pollution,high energy efficiency,saving transmission and distribution resources and operating costs and other advantages gained wide attention.After studying and summarizing the related work of the predecessors,this paper mainly studies the data communication of micro-grid based on distributed power generation technology based on micro-grid as the research object.First,the working principle of wind power generation,solar photovoltaic power generation,fuel cell power generation and micro-gas turbine power generation in distributed power supply is studied in view of the demand of distributed power grid.The operation mode of the distributed power grid is studied.Then,according to the problems of micro-grid peer-to-peer control and the master-slave control structure,the relationship between micro-grid and large power grid is analyzed,and some related technologies of micro-electric control strategy are analyzed.This paper presents a micro-grid control system based on IEC 61850,which adopts hierarchical structure to analyze the communication service in micro-grid.The structure and communication business of micro-grid communication network are modeled and simulated by OPNET network simulation software.Finally,the multi-agent system is designed for the actual demand of the smooth switching between the grid operation mode and the grid-running mode.A multi-agent system based on micro-grid communication model is established.The system consists of an upper layer coordination agent and multiple lower level execution agents.According to the grid connection request and the detection result of the island detection agent and the network detection agent,it is determined whether the micro-grid is suitable for grid operation.The simulation model of multi-agent system is built on MATLAB / Simulink platform.Real-time simulation is carried out with MATLAB,and the smooth switching of micro-grid operation mode is realized by multi-agent system technology.Which realizes the smooth switching of the grid operation mode and the islanding mode.The feasibility of using multi-agent in controlling the smooth switching micro-grid operation mode is verified.