In this paper, a variable perturbation size adaptiveperturb and observe (p&o) maximum power point tracking (mppt) algorithm is proposed to track the maximum power under sudden changes in irradiance. The proposed ...
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In this paper, a variable perturbation size adaptiveperturb and observe (p&o) maximum power point tracking (mppt) algorithm is proposed to track the maximum power under sudden changes in irradiance. The proposed method consists of three algorithms, namely current perturbation algorithm (CpA), adaptive control algorithm (ACA), and variable perturbation algorithm (VpA). CpA always tries tooperate the photovoltaic (pV) panel at maximum power point (Mpp). ACA sets the operating point closer to Mpp, only if the operating limits are violated. These operating limits are expressed in terms of the operating current range of the pV panel and the sudden changes in irradiance. VpA dynamically reduces the perturbation size based on polarity of change in power. Two-stage variable size perturbation is proposed in this paper. The proposed algorithm is realized using a boost converter. The effectiveness of proposed algorithm in terms of dynamic performance and improved stability is validated by detailed simulation and experimental studies.
In solar photovoltaic (pV) system applications, one of the most important tasks is to extract maximum power from pV arrays with minimum losses. Maximum power point tracking (mppt) is a commonly used method to maximize...
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In solar photovoltaic (pV) system applications, one of the most important tasks is to extract maximum power from pV arrays with minimum losses. Maximum power point tracking (mppt) is a commonly used method to maximize power extraction from pV systems under all environmental conditions. In this paper, a modified perturb and observe (p&o) tracking method using an interleaved DC-DC buck converter is proposed and compared with the traditional method. The proposed method uses illuminance level as the perturb signal to control the converter's duty cycle under varying solar radiation conditions. The results validate the speed and effectiveness of the method, which is centring illuminance level comparing its performance to the traditional p&o method.
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