基于改进变步长电导增量法光伏阵列MPPT研究

摘要

By analyzing the characteristics of photovoltaic array,in sudden large irradiance changes,variable step size incremental conductance (INC) method causes the system to oscillate due to incorrect calculations.An improved INC method is proposed, which can improve the operational stability of photovoltaic power generation system.The hardware circuit of Boost maximum power point tracking (MPPT) controller is built.The experimental results show the improved method can quickly and accurately track the MPP and stably work at MPP in sudden large irradiance changes.%通过分析光伏阵列特性,针对变步长电导增量( INC)法在光照强度发生大幅度变化时由于错误计算步长引起的系统振荡的缺点,采用了一种改进的变步长INC法,能够快速并准确地进行最大功率点跟踪(MPPT).最后搭建了Boost MPPT控制的硬件电路进行实验验证.结果表明,在光照强度发生大幅度变化时,改进后的算法能快速、准确地跟踪到最大功率点(MPP)并很好地稳定在MPP工作,表现出良好的动态性能.