太阳能电池接Boost电路MPPT控制仿真分析

针对实时数字仿真仪（RTDS）／RSCAD中提供的太阳能阵列模型，测试其I-V及P-V特性，并外接Boost变换电路进行实时仿真采用恒定电压跟踪法．对太阳能阵列输出的实时电压值与给定值的偏差信号进行PI调节，控制升压斩波（Boost Chopper）变换电路的占空比D，进而实现太阳能阵列外接电路的等效电阻值的自动手优，当电阻值达到太阳能阵列工作于最大功率点（MPP）处外接等效电阻RCN值时，即实现了太阳能电池阵列最大功率点跟踪（MPPT）控制．从而大大提高了太阳能利用效率。

Simulation Analysis of MPPT Control in Solar Array with External Boost Circuit

For the solar array model in RTDS/RSCAD,the I-V and P-V characteristics are tested and the model is connected to the external Boost transform circuit for real-time simulation.The constant voltage tracking method is applied.In the method,the deviation the real-time voltage value and the given value input to PI adjustment and then the duty cycle of the boost chopper circuit is controlled.In addition,the automatic optimization of the equivalent resistance of the external circuit of solar array can be realized.While the resistance reaches the external equivalent resistance value of maximum power point(MPP),the maximum power point tracking(MPPT) control of solar array is realized and this can greatly improve the efficiency of solar energy.