Research On Energy Management System Of Isolated Island Operating Microgrid

Smart microgrid is a network structure composed of diverse distributed power generation units,energy storage and energy conversion devices,energy management system,load,etc.,and an autonomous integrated system with selfcontrol,protection and management functions.The adoption of microgrid structure can realize the scientific integration of various forms of distributed power supply,so that it can better meet the demand of load growth,effectively improve the environment,and significantly improve the reliability of power supply and energy comprehensive utilization efficiency.In this paper,according to HaDian smart micro-network-desalination integrated system pilot project,the energy management system of isolated island operating microgrid is studied.The research contents are as follows:Firstly,this paper introduces the basic structure of the microgrid system,which is composed of direct-drive permanent magnet wind turbine,battery,energy storage bidirectional inverter(PCS),diesel generator and seawater desalination load.The mathematical models of wind power generation system,storage battery,energy storage bidirectional inverters(PCS)and diesel power generation system are established respectively,and the simulink simulation of wind storage mode is built,the simulink simulation of Matlab is used to analyze the characteristics of wind storage mode under isolated island operation of microgrid.through the observation of the simulation results,through the observation of the simulation results,the stability of the microgrid operation under the isolated island mode and the feasibility and rationality of the control strategy of the microgrid energy management system using the maximum wind energy are verified.Secondly,the control logic of microgrid system in isolated island mode is described.through the in-depth study of the power generation principle and operation characteristics of each distributed power generation unit,the operation strategy of wind power generation system,energy storage system and diesel generation system is analyzed,and then the operation control strategy of microgrid in wind storage mode is put forward to ensure the security and stability of microgrid operation.Then,after defining the system architecture,structure design and function design of the microgrid system design,according to the engineering background of the HaDian smart micro-network-desalination integrated system pilot project,the software and hardware of microgrid energy management system and the actual development and design of monitoring system are carried out.Finally,the energy management system development platform design scheme is given,completes the hardware test system to build,software and monitoring system development work.Through the system segmentation debugging and the system joint debugging effective verification,draws the conclusion: The energy management system can improve the utilization rate of new energy and ensure the safe and stable operation of microgrid under the maximum wind energy control strategy.The research results of this subject are convenient for popularization and application,to ensure the power supply reliability of microgrid in islands and remote areas of China.