Research On Regional Micro-grid Monitoring System

In recent years,with the popularization of the new energy power generation,more and more Micro-grid systems emerged as the time requires.Micro-grid is a combination of distributed generation devices and user side loads.The monitoring system is the core part to ensure the stable operation of the Micro-grid system.It can collect and monitor the key execution units,feedback system's failure timely and coordinate the various units to optimize the overall performance of the system.While traditional ones lack flexible configuration,mainly based on a set of fixed modes to run,with poor scalability.And equipment protocol's diversification makes it difficult to access monitoring system for unified management.This thesis will focus on monitoring and communicating in regional monitoring system.In order to embody the flexible configuration,dividing region to scenes,and doing research for the unification of communication protocols;In order to solve the problem of the unified management of micro-grid equipment,the proper unified communication protocol is to be selected.The main contents of the thesis are as follows.(1)First of all,the thesis makes a deep analysis on the overall architecture of system.Then based on the expansibility of regional micro-grid monitoring system,analyzing the function of its software.Based on the micro-grid monitoring system experimental platform of a practical,verifying The software functions that show its expansibility.The prototype of micro-grid monitoring system is also studied in this thesis and the research results also indicate the direction for the future development of the monitoring system.(2)Based on the three typical areas of micro-grid scene,buildings,campus and family,this paper studies on various wired and wireless communication methods and comparative analysis of advantages and disadvantages,combining with the concept of unifying communication access,select a appropriate communication protocol as a unified access standard.The Modbus TCP protocol was adopted after analysis.Then build the appropriate communication network topology.Modbus Poll software is used to test the communication network topology,which is proved to be feasible.(3)In the campus's repeater communication experiment,in order to solve the problem of difficult power supply,combine with the concept of outdoor and solar energy,the power supply module of 43 3 MHz repeater is made to ensure the power supply.(4)Combined with the concept of unified communication access,the Zigbee protocol doesn't have a direct access to the micro-grid monitoring system,so IAR software is used to encapsulate the data collected by the Zigbee network in the Modbus protocol.Realizing the indirect access to the Zigbee network of the regional micro-grid monitoring system.