Design And Research Of Micro Grid System Based On PERC Dual Axis Application Technology

Micro grid,as a supplementary operation mode of large power grid,is relatively flexible,which can reduce the impact of distributed power directly connected to large power grid.However,due to the limited space,the micro grid can not install enough distributed power supply,resulting in low reliability of power supply,which often requires the large grid to provide power for the micro grid.On the other hand,because the micro grid structure is relatively simple and the robust characteristics are relatively poor,it is difficult to ensure the power quality of power supply,and often needs the support of voltage and frequency provided by the large grid.In order to improve the power generation per unit area and power quality of microgrid,this paper designs and optimizes the microgrid systemFirstly,by analyzing the difference between perc battery and Al-BSF,the theoretical basis of high power generation of perc battery is obtained.On the other hand,this paper studies and determines the tracking scheme of the dual axis tracking system,and analyzes and selects the microprocessor and driver chip of the dual axis tracking system.Then,a microgrid model is constructed based on the equivalent control strategy.By studying the mathematical model of microgrid,a droop control strategy suitable for low-voltage microgrid is proposed.Finally,the design scheme and the structure and parameters of the system filter,droop controller and other modules are determined.Then,the micro grid is verified and analyzed by simulation and experiment.Firstly,the perc battery is simulated by PC1 D software,and the influence of back surface passivation on perc battery is analyzed.Secondly,the dual axis tracking system based on 51 single chip microcomputer is designed and simulated by Proteus Software.Then,two comparative experimental power stations are established to verify that the power generation mode of double-sided perc battery combined with dual axis is better than that of fixed installation aluminum back field battery with the same capacity Efficiency increased by 45%.Finally,Matlab / Simulink software is used to verify the droop control strategy of microgrid system.Finally,the micro grid power generation part of the hardware selection and accounting,and through the simulation of the annual load consumption and collection of micro grid test run data to verify that the micro grid system can meet the needs of its own load.On the one hand,two optimization schemes based on Two-axis tracking mode are proposed.Pvsyst software simulation and corresponding experimental platform are used to verify that the optimized distributed power supply can provide more power for microgrid.On the other hand,in the process of PU / QF droop control simulation,an optimization method is proposed to solve the problem of differential power supply caused by unequal line impedance Finally,Matlab/Simulink software is used to simulate the improved droop control scheme,which cansolve the problem of power imbalance in microgrid system.