An improved MPPT method for PV system with fast-converging speed and zero oscillation

Li, Xingshuo, Wen, Huiqing, Jiang, Lin, Xiao, Weidong, Du, Yang, and Zhao, Chenhao (2016) An improved MPPT method for PV system with fast-converging speed and zero oscillation. IEEE Transactions on Industry Applications, 52 (6). pp. 5051-5064.

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Abstract

Maximum power point tracking (MPPT) is essential for photovoltaic (PV) systems to ensure the highest power output of PV arrays under any environmental condition. Comparing to other techniques, the Beta method shows advantages in terms of tracking speed, steady-state performance, and simple implementation. However, the conventional Beta can further be improved by minimizing oscillations around the maximum power point under a steady state and an increasing tracking speed in response to rapid changing of irradiance or temperature. An improved Beta-parameter-based MPPT method is proposed in this paper to achieve the above-mentioned objectives. An adaptive scaling factor is introduced and utilized in the MPPT mechanism, which enhances the tracking speed and is easily applied for any PV power system. Furthermore, the proposed method can identify and maintain the middle point of the three-level perturbations, which eliminate the oscillations at a steady state. The control mechanism is not limited by specific operating conditions and illustrates superior performance over traditional methods with regards to transient response and steady-state performance, which contributes to effective solar power harvesting. Followed by theoretical analysis, the simulation and experimental evaluation validate the claimed advantages of the proposed MPPT solution.

Item ID: 58382
Item Type: Article (Research - C1)
ISSN: 1939-9367
Keywords: Steady-state, Oscillators, Transient analysis, Maximum power point trackers, Temperature, Temperature dependence, Convergence
Copyright Information: Copyright © 2016, IEEE
Funders: State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, State Key Laboratory of Electrical Insulation and Power Equipment, National Natural Science Foundation of China (NNSFC)
Projects and Grants: NNSFC 10.13039/501100001809
Date Deposited: 29 May 2019 01:12
FoR Codes: 09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090608 Renewable Power and Energy Systems Engineering (excl Solar Cells) @ 100%
SEO Codes: 85 ENERGY > 8505 Renewable Energy > 850504 Solar-Photovoltaic Energy @ 100%
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