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首页> 外文期刊>Power Electronics, IET >Efficient global maximum power point tracking technique for a partially shaded photovoltaic string
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Efficient global maximum power point tracking technique for a partially shaded photovoltaic string

机译:用于部分阴影光伏串的高效全局最大功率点跟踪技术

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摘要

Maximum power point tracking (MPPT) is essential for a photovoltaic (PV) system in order to maximise the utilisation of solar energy. Under partially shaded conditions (PSC), PV strings with bypass diodes exhibit multiple peaks in the power-voltage (P-V) characteristics. Although various Global MPPT (GMPPT) algorithms have been proposed to address this issue, most of them cannot distinguish between PSC and uniform insolation, leading to the scan of the entire P-V curve under uniform insolation levels. This study introduces a general method to detect the occurrence of PSC in a PV string thereby dispensing the need to scan the entire PV curve under uniform insolation. Further, a simple technique is proposed to determine the GMPP with the minimum possible search space under PSC. The proposed algorithms for the detection of partial shading and GMPPT are validated experimentally.
机译:为了最大程度地利用太阳能,最大功率点跟踪(MPPT)对于光伏(PV)系统至关重要。在部分阴影条件(PSC)下,带有旁路二极管的PV灯串在电源电压(P-V)特性中表现出多个峰值。尽管已提出了各种全局MPPT(GMPPT)算法来解决此问题,但大多数算法无法区分PSC和均匀日照,从而导致在均匀日照水平下扫描整个P-V曲线。本研究介绍了一种检测PV串中PSC发生的通用方法,从而无需在均匀日光下扫描整个PV曲线。此外,提出了一种简单的技术来确定在PSC下具有最小可能搜索空间的GMPP。实验验证了所提出的局部阴影和GMPPT检测算法。

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