Dynamic Simulation Of Micro-grid With A Variety Of Distributed Generation

With the increasing depletion of fossil energy and the more and more intensity of the national environmental pollution control,new energy has ushered in a rare opportunity for development.Distributed generation shows the broad prospects for development due to its strong environmental protection and high flexibility.As the supplement of the power grid,the micro-grid can play a positive role for the collaborative control and stable operation of different DG.Therefore,the micro-grid has obtained good application and promotion.Based on the two kinds of DG systems,the photovoltaic power generation system and the synchronous generator,this paper firstly studies the operating principles of the photovoltaic cells,and make models for the photovoltaic cells.With output characteristics under different temperature and light conditions,this paper validates its output characteristics.Secondly this paper analyzes the working principles of the Boost circuit,and introduces the principle and realization of the maximum power point tracking method for the photovoltaic battery.Furthermore,this paper also proposes the duty ratio interference method,and obtains its superiority with the simulations of the output characteristic.Then this paper analyzes the synchronous generator power generation system,and makes the theoretical calculation and model.Finally,based on the micro-grid containing the photovoltaic power generation system and the synchronous generators,this paper discusses the control strategies of the micro-grid,and simulates the output characteristics for the whole micro-grid with the peer-to-peer control strategy.This can accurately reflect the dynamic characteristic of the system in various conditions,and improve the output stability of the micro-grid,and also can improve the utilization efficiency of the clean energy.