Improved and Fast Global Maximum Power Point Tracking Algorithm of Photovoltaic Power Generation System

ZHOU Guohua; XUE Ning; BI Qiang

doi:10.3969/j.issn.0258-2724.20220863

Volume 59 Issue 6

Dec. 2024

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Journal of Southwest Jiaotong University > 2024 > 59(6): 1266-1274.

ZHOU Guohua, XUE Ning, BI Qiang. Improved and Fast Global Maximum Power Point Tracking Algorithm of Photovoltaic Power Generation System[J]. Journal of Southwest Jiaotong University, 2024, 59(6): 1266-1274. doi: 10.3969/j.issn.0258-2724.20220863

Citation:

ZHOU Guohua, XUE Ning, BI Qiang. Improved and Fast Global Maximum Power Point Tracking Algorithm of Photovoltaic Power Generation System[J]. Journal of Southwest Jiaotong University, 2024, 59(6): 1266-1274. doi: 10.3969/j.issn.0258-2724.20220863

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Improved and Fast Global Maximum Power Point Tracking Algorithm of Photovoltaic Power Generation System

doi: 10.3969/j.issn.0258-2724.20220863

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 611756, China

Received Date: 14 Dec 2022
Rev Recd Date: 10 Mar 2023

Available Online: 14 Oct 2024

Publish Date: 18 Mar 2023

Abstract

Abstract

In order to improve the energy utilization of photovoltaic (PV) power generation under partial shading conditions (PSCs), an improved and fast global maximum power point tracking (GMPPT) algorithm was proposed. Firstly, the output characteristics of PV array under PSCs were researched, and the output curve of PV array was divided into constant current region (CCR) and constant voltage region (CVR) according to the relationship between knee point and open circuit voltage. Then, the operation principles of the traditional maximum power trapezium (MPT) algorithm and the improved and fast GMPPT algorithm were analyzed. The improved and fast GMPPT algorithm is based on the MPT algorithm, where the search interval is limited by dynamic upper and lower limits of voltage, and CCR with a long adjustment time was skipped to further improve the tracking speed. Finally, the effectiveness of the proposed algorithm was verified by simulation and experiment. The experimental results reveal that the minimum tracking time of the improved and fast GMPPT algorithm is 4.0 s, and the scanning voltage and the energy loss of the proposed algorithm are 17.34 V and 98.19 J, respectively. Compared with the traditional global scanning algorithm and the MPT algorithm, the proposed algorithm decreases tracking time by 68.25% and 68.00%, lowers scanning voltage by 74.86% and 75.63%, and reduces energy loss by 58.19% and 62.31%, respectively.
- maximum power point tracker,
- constant current region,
- adjustment time,
- photovoltaic power generation system,
- global optimization

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References(20)

References

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