A Newton-Based Extremum Seeking MPPT Method for Photovoltaic Systems with Stochastic Perturbations

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="938526.fig.0016a" src="https://static.hindawi.com/articles/ijp/volume-2014/938526/figures/938526.fig.0016a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Power</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="938526.fig.0016b" src="https://static.hindawi.com/articles/ijp/volume-2014/938526/figures/938526.fig.0016b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Current</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="938526.fig.0016c" src="https://static.hindawi.com/articles/ijp/volume-2014/938526/figures/938526.fig.0016c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Voltage</td></tr></table></td></tr><tr class="fig-image" id="d"><td><img alt="938526.fig.0016d" src="https://static.hindawi.com/articles/ijp/volume-2014/938526/figures/938526.fig.0016d.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(d) </b>PWM signal</td></tr></table></td></tr></table>

<table>Tracking performance of the gradient-based extremum seeking MPPT algorithm under nonuniform irradiance.</table>

International Journal of Photoenergy

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Figure 16

Figure 16: A Newton-Based Extremum Seeking MPPT Method for Photovoltaic Systems with Stochastic Perturbations 