Research And Implementation Of Microgrid Operation Optimization Based On Demand Side Management

As a new distributed generation organizational structure,microgrid has the ability of self-control and self-energy management.Because of the adoption of networked supply and management technology,the microgrid can not only realize grid connection of distributed generation,but also improve the utilization ratio of the distributed generation.However,there are still some problems in the microgrid energy management.First of all,most of the optimal scheduling strategy only considers the generation side,while the demand side scheduling is less considered so that the operating costs is difficult to further reduce.Secondly,due to the decentralization of the distributed generation in the microgrid,the energy management system based on the traditional power system scheme and the communication mode of the lower layer are complicated and costly.In view of this,the research of the demand side scheduling strategy and implementation of communication have important significance.This dissertation firstly introduces the hierarchical control structure and distributed generation model.Secondly,the management model is established based on the problem of demand side energy optimization of microgrid.Thirdly,under the condition of grid connection and island operation,the optimization objective function and constraint conditions are determined.The improved artificial bee colony algorithm is used to solve the different examples,and the results are compared with those befo re optimization.Finally,the results show the operating cost of the microgrid is reduced,and the outage capacity of interruptible load can be effectively reduced after optimization.Under the hierarchical control structure of microgrid,the energy management system of microgrid is designed by Qt Creator.The communication mode is determined based on the microgrid energy management architecture.The CAN bus,485 and Ethernet communication can be realized by STM32F407.The research focuses on the synchronization problem in microgrid communication,and proposes to use IEEE1588V2 protocol in Ethernet communication to achieve microgrid precise time synchronization,thereby reducing cost s of microgrid time synchronization under the premise of satisfying the synch ronization precision.On the basis of the above work,the experimental scheme is designed to verify the implementation method of the communication network.The results show that the communication function is complete,and th e time synchronization method also meet the requirements of power system synchronization accuracy.Based on the microgrid energy management system,the integrated communication experiment and the introduction of the scheduling data experiment are carried out.The results show that the energy management system designed in this dissertation achieves the expected effect.