Analysis And Research On Operation Control Technology In DC Area Grid

With the continuous expansion of the modern power grid and the increasing demand,the level of people's lives and the complexity of the load,so that it can not fully meet the needs of the existing power grid.Therefore,the concept of clean energy,such as solar energy,wind power,nuclear power,came into being.However,there are some problems in the large-scale introduction of the new energy,and the coordination,control and protection of the distributed energy affect the stability of the system.The implementation of the Jinzhai scheme this paper mainly originates from the author in the DC micro grid construction project,the author analyzes and researches on operation control technology of Jinzhai DC micro grid project scheme,the full text of the content:(1)the research background and significance of microgrid are introduced.The research status and main demonstration projects of microgrid at home and abroad are briefly introduced.(2)discuss the single end grid DC micro grid operation control technolo gy,we propose a hierarchical / DC bus voltage droop control strategy based on the control strategy by detecting the changes of DC bus voltage,controlling the operation mode of local DC power to maintain the local electricity network in DC power balance.(3)control strategy for DC microgrid is proposed in this paper,the simulation model of DC micro grid based on MATLAB/simulink simulation platform,the simulation research related to the verification of the proposed control strategy is feasible and effective.(4)according to the project actual local DC power supply,the economic benefits of the project are analyzed: including the analysis of the power supply capacity,operation efficiency,voltage loss,line loss,cost analysis and storage system.The results show that the DC system has some advantages in system efficiency,voltage stability and economic cost.Above all,this paper from the summary and thinking of practical engineering,analysis and Research on local operation control technology of DC micr o grid,which has a certain significance,has the reference and guiding role in the implementation of the project.