基于多模型状态估计的光伏阵列MPPT技术

摘要

The maximum power point of photovoltaic array had the characteristics of nonlinear, time-varying uncertainty and more local power peaks under the condition of partial shading.The modern state estimation theory was adopted to establish the dynamic model of PV array output power, and the improved interacting multiple model estimation algorithm was adopted to improve the accuracy of tracking power curve, and restrain the noise to track the maximum power point.On this basis, the photovoltaic array MPPT technology based on interacting multiple model state estimation was proposed.The simulation and experiment verified the correctness and validity of the new MPPT control strategy, which can quickly and accurately track the maximum power point regardless of whether the shadow cases.Thus, the efficiency of photovoltaic power generation was improved.%针对光伏阵列最大功率点在局部阴影情况下具有非线性、时变不确定和多个局部功率峰值的特点,采用现代状态估计理论建立光伏阵列输出功率动态模型,利用交互多模型估计算法精确跟踪多状态多峰功率曲线,抑制噪声定位出最大功率点,提出基于多模型状态估计的光伏阵列MPPT技术.仿真和实验验证了所提新MPPT控制策略的正确性和有效性,在有、无阴影情况下都能够快速且准确地跟踪最大功率点,提高光伏发电效率.