Research On Building Intelligent Power Supply System Based On Green Power

In recent years,the green energy represented by photovoltaic has received much attention at home and abroad.Centralized photovoltaic power stations and wind power plants are springing up like bamboo shoots after a spring rain on the ground.However,in some provinces of our country,the energy waste problem of "abandoning wind and light" is very serious.In order to apply green energy in residents' life more efficiently,it is a good direction to combine it with building power supply.In order to achieve this goal,this paper will make use of photovoltaic to provide electric energy for buildings as a research subject,aiming to improve its utilization rate on the user side and reduce the negative impact of green energy on the energy feedback of ac large power grid and the switching of grid-connected state.The core content of this study is around the village residential research green energy power supply system of intelligent building energy coordination strategy,in order to solve the photovoltaic power generation side,electricity load side,energy storage system and the ac energy coordination problems,to achieve the power supply and the demand of building load balance,at the same time to reduce the ac power grid and the photovoltaic energy interaction time and interconnection for times.In order to achieve the research goal,based on the analysis of the general situation of the power supply side of the building,the green energy coordination strategy was designed.The topological structure of energy coordination strategy and the determination of voltage levels on both sides of ac and dc;Day-ahead prediction of load and power generation using time series and BP neural network;The design is based on the predicted control mode of active control converter switching and new green energy coordination strategy.In order to verify the feasibility of the coordination strategy,this paper used Matlab/Simulink software to model the green energy power supply system,including photovoltaic array,hybrid energy storage,voltage converter,etc.,and selected the basic control mode of each part by comparison,and finally verified the availability of the system model through combined simulation.The energy coordination strategy was added to the established model for simulation,and the simulation results finally verified the improvement of the coordination strategy compared with the traditional strategy in aspects such as the improvement of photovoltaic utilization rate,the reduction of power quality impact on ac power grid and the reduction of inverter switching times.After simulation,for the purpose of green energy power supply system of subsequent field validation of terminal product research and development and coordination strategy based on photovoltaic simulator,lithium iron phosphate battery,programmable dc impedance load equipment formed a set of power supply system of building physical simulation platform and design green energy building power supply PC system,at the same time using TSM320F28335 as main control chip design a small power ac/dc converter prototype,for subsequent small power experiment.In this paper,the green energy power supply system and new coordination strategy are simulated by using the experimental platform.