New Maximum Power Point Tracker Using Sliding-Mode Observer for Estimation of Solar Array Current in the Grid-Connected Photovoltaic System
New Maximum Power Point Tracker Using Sliding-Mode Observer for Estimation of Solar Array Current in the Grid-Connected Photovoltaic System
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DOI：
10.1109/tie.2006.878331
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发表时间：
2006-08
影响因子：
7.7
通讯作者：
Il-Song Kim;Myung-Bok Kim;M. Youn
中科院分区：
文献类型：
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作者：
Il-Song Kim;Myung-Bok Kim;M. Youn
提出了一种适用于无太阳能电池板电流传感器的光伏并网系统的新型最大功率点跟踪器。从滑模观测器获取太阳能电池阵列电流信息，并将其馈入最大功率点跟踪装置以产生参考电压。在参数变化和噪声环境下，电容值等参数值的变化幅度可达50%，线性观测器无法估计正确的状态值。滑模观测器结构简单，但对模型不确定性和参数变化具有较强的跟踪能力。本文提出了太阳能电池板电流的滑模观测器来补偿参数变化。数学建模和实验结果验证了该方法的有效性
A new maximum power point tracker (MPPT) for a grid-connected photovoltaic system without solar array current sensor is proposed. The solar array current information is obtained from the sliding-mode observer and fed into the MPPT to generate the reference voltage. The parameter values such as capacitances can be changed up to 50% from their nominal values, and the linear observer cannot estimate the correct state values under the parameter variations and noisy environments. The structure of a sliding-mode observer is simple, but it shows the robust tracking property against modeling uncertainties and parameter variations. In this paper, the sliding-mode observer for the solar array current has been proposed to compensate for the parameter variations. The mathematical modeling and the experimental results verify the validity of the proposed method