光伏发电系统最大功率点快速跟踪控制研究

Research on Maximum Power Point Fast Tracking Control of Photovoltaic Generation System

针对光伏发电系统最大功率点跟踪(MPPT)恒定电压控制法(CVT)的缺点,提出了一种新的基于温度系数在线修正的改进CVT法,与传统的CVT控制相比,它能更快速准确地跟踪最大功率点(MPP)。为进一步提高跟踪控制的精度和效率,结合电导增量法(IncCond)实现对光伏电池最大功率点跟踪(MPPT)的复合控制,即在系统偏离MPP误差较大时采用CVT控制,快速调整光伏组件的工作点,再采用IncCond进行MPPT控制。最后通过实验验证了该MPP快速追踪控制策略的正确性和优越性。

Aiming at the shortcomings of constant voltage tracking control method（CVT）of photovoltaic power genera-tion system maximum power point tracking（MPPT）,a novel improved online correction CVT based on temperature coef-ficient is proposed,which can more quickly and accurately tracking the MPP compared to the traditional CVT control.On the basis of this improved CVT method,with incremental conductance（IncCond）method compound control is pro-posed to further enhance the accuracy and efficiency of the tracking control.When the MPP’s error is large,use CVT rapidly adjust the working point of PV modules,then use IncCond precise control.The experiments validate the cor-rectness and superiority of this MPP fast tracking control strategy.