自适应变步长电导增量法的最大功率点跟踪控制

MPPT Control Research Using Adaptive Variable Step Size Incremental Conductance

针对光伏发电系统最大功率点跟踪控制,提出了固定电压和自适应变步长电导增量相结合的方法.该方法首先采用固定电压法将光伏阵列的工作点调整到最大功率点附近,然后启动变步长电导增量法实现精确的最大功率点跟踪控制.仿真结果证明,该自适应变步长电导增量法能够快速、准确地跟踪最大功率点,避免了最大功率点处的振荡,提高了系统稳定性和能量转换效率.

Based on maximum power point tracking （MPPT） control for PV power generation system, a method combining constant voltage and adaptive variable step size incremental conductance is proposed. Constant voltage method is firstly used to adjust operating point quickly approach the maximum power point （MPP） of PV array, and then the variable step size incremental conductance method is adopted to achieve accurate MPPT control. Simulation results show that this kind of method of adaptive variable step size incremental conductance can track the MPP of PV cells quickly and accurately, avoid oscillation near MPPT and improve the system stability and efficiency of energy conversion.