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首页> 外文期刊>International journal of green energy >A new simple MPPT algorithm to track MPP under partial shading for solar photovoltaic systems
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A new simple MPPT algorithm to track MPP under partial shading for solar photovoltaic systems

机译：一种新的简单MPPT算法，可在太阳能光伏系统的部分阴影下跟踪MPP

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摘要

Extraction of electrical power from solar photovoltaic (PV) systems under nonuniform irradiance such as partial shading (PSC) or fast transient conditions (FTC) is the most challenging task for the solar PV researchers. Inaccurate detection of PSC or FTC affects the efficiency of maximum power point tracking (MPPT) algorithms. As multiple peaks are found in the P-V curve, searching of the global peak among local peaks and stabilizing the output voltage is a typical task for an MPPT algorithm during PSC or FTC. Particularly for small isolated PV systems, the output system voltage stability is of more concern than power efficiency during PSC. Here, a Modified Perturb and Observation (P&O) (MP&O) MPPT algorithm is proposed for accurate detection of PSC, which stabilizes the system output voltage without compromising with power efficiency. For accurate detection of PSC, the MP&O MPPT algorithm uses irradiance (Ir(k)) and generated PV power (P(k)) as an input parameter and regulates the step size (dD) of the boost converter duty cycle (D). A PV system is simulated in MATLAB/Simulink and the performance of the proposed algorithm is also investigated using dSPACE controller, solar PV emulator and a SiC Mosfet switch under PSC. The accuracy to detect PSC or FTC of this algorithm is found satisfactory with fast tracking speed.
机译：在不均匀辐照度（例如部分阴影（PSC）或快速瞬态条件（FTC））下从太阳能光伏（PV）系统中提取电能是太阳能光伏研究人员最具挑战性的任务。 PSC或FTC的不正确检测会影响最大功率点跟踪（MPPT）算法的效率。由于在P-V曲线中找到多个峰，因此在PSC或FTC期间，在MPPT算法中，在局部峰之间搜索全局峰并稳定输出电压是MPPT算法的典型任务。特别是对于小型隔离式PV系统，在PSC期间，输出系统的电压稳定性比功率效率更为重要。在此，提出了一种改进的扰动与观测（MP＆O）（MP＆O）MPPT算法，用于PSC的精确检测，该算法可稳定系统输出电压而不会影响功率效率。为了精确检测PSC，MP＆O MPPT算法使用辐照度（Ir（k））和生成的PV功率（P（k））作为输入参数，并调节升压转换器占空比（D）的步长（dD）。在MATLAB / Simulink中对光伏系统进行了仿真，并使用dSPACE控制器，太阳能光伏仿真器和PSC下的SiC Mosfet开关研究了该算法的性能。发现该算法检测PSC或FTC的精度令人满意，跟踪速度很快。

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