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Variable step size modified P&O MPPT algorithm using GA-based hybrid offline/online PID controller
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DOI：10.1016/j.rser.2015.05.003.png)
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This paper presents a new modified Perturbation and Observation (P&O) maximum power point tracking algorithm with adaptive duty cycle step using PID controller based on genetic algorithm. The classical P&O MPPT algorithm is widely used in several applications due to its simplicity; however, P&O prone to failure especially when high changes in irradiance, oscillation around the MPP and the convergence speed. To face this challenge and in order to overcome the drawbacks of the classical P&O MPPT, a new method based on variable-step size of modified P&O MPPT method using PID controller tuned by genetic algorithm is presented. The efficiency of the proposed method has been studied successfully using a boost converter connected to a Solarex MSX-60 model Analysis and comparison with the classical fixed step size P&O and that developed genetic variable step size are presented. The efficiency and improvements of the proposed algorithm in transient, steady-state and dynamic responses, especially under rapidly changing atmospheric conditions, related to ripple, overshoot and response time have been demonstrated. Algorithm robustness was verified using different schemes for temperature and insolation proving its ability to track the maximum power point in case of random and fast changing atmospheric conditions. (C) 2015 Elsevier Ltd. All rights reserved.
Keyword:
Photovoltaic cell modeling
Boost converter
MPPT variable step size
MPPT genetic algorithm
MPPT P&O algorithm
Offline/online PID controller
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16.3
论文数:
1.6W
被引数:
18.5W
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