This paper presents a model-based approach for the global maximum power point (GMPP) tracking of solar strings under partial shading conditions. In the proposed method, the GMPP voltage is estimated without any need to solve numerically the implicit and nonlinear equations of the photovoltaic (PV) string model. In contrast to the existing methods in which first the locations of all the local pe...

Partial shading (PS) is an unavoidable condition which significantly reduces the efficiency and stability of a photovoltaic (PV) system. With PS, the system usually exhibits multiple-peak output power characteristics, but single-peak is also possible under special PS conditions. In fact it is shown that the partial shading condition (PSC) is the necessary but not sufficient condition for multip...

This paper presents the capability of the Asymptotic Perturbed Extremum Seeking Control (aPESC) scheme to track the Global Extreme on multimodal patterns. The multimodal patterns are simulated based on power characteristics generated by a photovoltaic (PV) array under Partial Shading Conditions (PSCs). The aPESC scheme is tested to evaluate the performance of locating, searching and tracking of...

Seeking Control (ESC): A review and a new GMPPT ESC scheme Nicu Bizon University of Pitesti, 1 Targu din Vale, Arges, 110040 Pitesti, Romania University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania [email protected], [email protected] Abstract: The objective of this paper is to present a survey of the Perturbed-based Extremum Seeking Control (PESC) methods a...

Photovoltaic array exhibits highly nonlinear electrical characteristics and the maximum power point tracking (MPPT) is always challenging. It becomes more complex during partial shading condition. The P-V array characteristics for shading condition have multiple maxima points and conventional MPPT technique fails to track global maximum power point. The operating point may settle at local point...

Partial shading is an unavoidable condition which significantly reduces the efficiency and stability of a photovoltaic (PV) system. When partial shading occurs the system has multiple-peak output power characteristics. In order to track the global maximum power point (GMPP) within an appropriate period a reliable technique is required. Conventional techniques such as hill climbing and perturbat...

The impact of Partial Shading Conditions (PSCs) significantly influences the output Photovoltaic Systems (PVSs). Under PSCs, Power-Voltage (P-V) characteristic PVS unveils numerous power peaks, inclusive local maxima and a global maximum. latter represents optimum point. Traditional Maximum Power Point Tracking (MPPT) algorithms struggle to track Global (GMPP). To address this, our study emphas...

This paper proposes an approach based on artificial neural networks (ANN) to control a grid-connected photovoltaic system (PVS) under partial shading (PS) conditions. In PS conditions, the P-V curve exhibits multiple peaks, with only one representing global maximum power point (GMPP), and others local points (LMPP). Traditional Maximum Power Point Tracking (MPPT) methods are unable identify GMP...