Construction Of Microgrid Experiment Platform And Research Of RT-LAB Simulation Platform

In recent years,the global environment and energy issues have become increasingly severe.As the most important form of energy that modern society depends on,electricity plays an important role in energy conservation,emission reduction,and sustainable energy use.Using distributed generation technology to make full use of clean and renewable energy is the main means for the power industry to achieve a low-carbon economy.However,the large-scale grid-connected operation of distributed generation can easily lead to a series of systematic problems such as power quality,relay protection,safety and stability.In order to effectively solve the problems caused by the large-scale grid-connected state of distributed power sources and fully realize its potential,micro-grids have been generated in the field of distributed power generation technology.At present,all countries in the world are actively establishing micro-grid experimental platforms and demonstration projects,and vigorously carry out research and application of micro-grids.This thesis focus on building a full-scale experimental platform and an RT-LAB full-digital simulation experimental platform of the micro-grid.Firstly,study and establish the mathematical model of each distributed power generation unit,use RT-LAB simulation platform to build a simulation model of photovoltaic and wind power generation units,and analyze the power generation characteristics and the real-time performance of RT-LAB simulation experiment platform,provide support for the construction of a full-scale experimental platform and verification of theoretical methods of the research group.Secondly,proposed the overall structure of the whole physical experiment platform of the micro-grid,and designed the hardware system consisting of a communication management machine,and distributed the hardware system of the platform composed of distributed power sources,energy storage devices,micro-grid rapid grid-connected switches,and micro-grid grid-connected controllers;Based on Modbus communication protocol,set up a communication system between controllers,distributed power supplies,energy storage devices and other devices on the communication management machine;Further establish a connection between the MATLAB simulation environment and thecommunication management machine to facilitate the establishment and research of the energy management system,thereby improving work efficiency;Design the monitoring system of the micro-grid experimental platform,forward the data to the upper computer through the communication management machine,realize visual processing in the upper computer,and set up an experimental platform software system together with a set of micro-grid control strategy software;Finally,set up the energy management system of the experimental platform in the upper computer to implement the real-time scheduling plan for the experimental platform on the background of the actual weather conditions of Qinhuangdao on a certain day in2017 to ensure the economic and safe operation of the micro-grid and realize the application of micro-grid energy management technology.The experiment and simulation platform studied in this thesis provides effective support for verification of the theoretical method of micro-grids.