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ABSTRACT: Because the power from Photovoltaic (PV) solar arrays depends on the array operating and surrounding conditions, it is beneficial to implement a maximum power point tracking (MPPT) technique to enlarge the amount of output power. There are several MPPT concepts and algorithms presented in the literature. This paper evaluates a load/output current based MPPT (LOC-MPPT) technique using P&O algorithm which requires the load current sensing only as the control variable. The LOC-MPPT technique is experimentally evaluated in this paper with different perturbation step sizes using a PV solar system prototype. The effect of the perturbation step size value on controller speed and accuracy is experimentally analyzed.
Energy Conversion Congress and Exposition (ECCE), 2011 IEEE; 10/2011
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ABSTRACT: The power generated by solar photovoltaic (PV) module depends on surrounding irradiance, temperature and shading conditions. Under partial shading conditions (PSC) the power from the PV module can be dramatically reduced and maximum power point tracking (MPPT) control will be affected. This paper presents a hybrid simulation model of PV cell/module and system using Matlab<sup>®</sup>/Simulink<sup>®</sup> and Pspice<sup>®</sup>. The hybrid simulation model includes the solar PV cells and the converter power stage and can be expanded to add MPPT control and other functions. The model is able to simulate both the I-V characteristics curves and the P-V characteristics curves of PV modules under uniform shading conditions (USC) and PSC. The model is used to study different parameters variations effects on the PV array. The developed model is suitable to simulate several homogeneous or/and heterogeneous PV cells or PV panels connected in series and/or in parallel.
Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE; 04/2011
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ABSTRACT: This paper presents an improved mathematical and simulation model for Solar Photovoltaic (PV) cells and compares it to an existing model. The model is able to simulate both the I-V characteristics curves and the P-V characteristics curves. The model is used to study different parameters variations effects on the PV array including operating temperature and solar irradiation level The results of the PV characteristics curves are compared to the curves provided by BPSX150 PV module datasheet. Matlab<sup>®</sup>/Simulink<sup>®</sup> software is used to implement the models and obtain the simulation results.
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on; 07/2010
