基于功率预测的自适应变步长MPPT算法研究OA北大核心CSTPCD

Maximum power point tracking(MPPT)is one of the research hotspots in the key technologies of photo-voltaic power generation system.In order to solve the problem that the traditional disturbance and observation method cannot give consideration to both the tracking speed and precision,an adaptive variable-step disturbance and observa-tion method is proposed in this paper,which takes power variation as step-size control.By judging the variation trend of power,when it is far away from the MPP,it adopts long step to track;when it is close to MPP,it uses small step to track.Firstly,the mathematical model of solar photovoltaic cell is established and its output characteristic curve is obtained.Then,Matlab/Simulink is used to build the MPPT simulation model based on Boost circuit.Finally,the simulation experiment verifies the stability,rapidity and accuracy of the proposed algorithm,which has better MPPT transient performance than the traditional algorithm.