Modeling and Simulation of MPPT for Photovoltaic (PV) Array under Partially Shaded Conditions

2012 ◽  
Vol 512-515 ◽  
pp. 97-100
Author(s):  
Guo Zhao ◽  
Xue Liang Huang ◽  
Yong Zhao
Keyword(s):  
Simulation Model ◽  
Local Maximum ◽  
Maximum Power ◽  
Partial Shading ◽  
Pv Array ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Voltage Curve ◽  
Output Characteristics ◽  
Power Point

Based on tow-diode model of PV cells, the simulation model of PV array is established. This simulation model can simulate the output characteristics of PV array according to different shading conditions. The output power-voltage curve of PV array may have multiple local Maximum Power Points (MPPs) due to the partial shading. As a result, traditional maximum power point tracking (MPPT) algorithms can easily fail to track global MPP, this can be one of main causes for reduced energy. In order to overcome this drawback, an improved global scanning MPPT algorithm is proposed. Moreover, Matlab-based model is established. It is verified by simulation results carried out that this improved MPPT algorithm is effective to track the global MPP.

A Modified Maximum Power Point Tracking Algorithm under Partial Shading Conditions

2013 ◽  
Vol 676 ◽  
pp. 330-334
Author(s):  
Bo Sun ◽  
Jian Yong Zheng
Keyword(s):  
Maximum Power Point Tracking ◽  
Local Maximum ◽  
Maximum Power ◽  
Global Maximum ◽  
Maximum Power Point ◽  
Partial Shading ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Output Characteristics ◽  
Power Point

Photovoltaic array output characteristics under partial shading conditions have multi local maximum power points, but traditional maximum power point tracking methods failed to identify global maximum power point. Output characteristics of shadowed PV array under different illumination were simulated by Matlab software. The rule between voltage of possible local maximum power point and the open circuit voltage was summarized. According to this rule, a modified algorithm based on the Incremental Conductance method was put forward. Simulations results indicated that the proposed MPPT algorithm can accurately track the global maximum power point under uniform illumination and partial shading conditions. It can improve the efficiency of PV system.

An Advanced MPPT Based on Artificial Bee Colony Algorithm for MPPT Photovoltaic System under Partial Shading Condition

2017 ◽  
Vol 8 (2) ◽  
pp. 647 ◽  
Author(s):  
Salmi Hassan ◽  
Badri Abdelmajid ◽  
Zegrari Mourad ◽  
Sahel Aicha ◽  
Baghdad Abdenaceur
Keyword(s):  
Local Maximum ◽  
Maximum Power ◽  
Photovoltaic System ◽  
Solar Irradiation ◽  
Global Maximum ◽  
Maximum Power Point ◽  
Partial Shading ◽  
Pv Array ◽  
Point Tracking ◽  
Power Point

<p>Maximum power point tracking (MPPT) algorithms are employed in photovoltaic (PV) systems to make full utilization of PV array output power, which have a complex relationship between ambient temperature and solar irradiation. The power-voltage characteristic of PV array operating under partial shading conditions (PSC) exhibits multiple local maximum power points (LMPP). In this paper, an advanced algorithm has been presented to track the global maximum power point (GMPP) of PV. Compared with the Perturb and Observe (P&amp;O) techniques, the algorithm proposed the advantages of determining the location of GMPP whether partial shading is present.</p>

scholarly journals Necessity Analysis of Bypass Diode for AC Module under Partial Shading Condition

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4778
Author(s):  
Huixue Ren ◽  
Peide Han
Keyword(s):  
Hot Spot ◽  
Local Maximum ◽  
Maximum Power ◽  
Photovoltaic Module ◽  
Maximum Power Point ◽  
Partial Shading ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Bypass Diode ◽  
Power Point

To protect a photovoltaic module from the hot spot effect more efficiently, an AC (alternating current) module that contains a module-level MPPT (maximum power point tracking) has been put forward. In this paper, operation states of shadowed solar cells and relevant bypass diodes were studied through MATLAB/Simulink tools, and a commercial PV module was used to reveal the temperature change when working at different LMPP (local maximum power point). Experiment results show that bypass diode can reduce power loss for the AC module to some extent but has a limited effect on protecting the AC module from the hot spot effect. Instead, it is more likely to form a local hot spot when the bypass diode turns on, and the worst shading condition for the AC module with bypass diode is about 46.5% during work states.

scholarly journals MPPT of a Photovoltaic Panels Array with Partial Shading Using the IPSM with Implementation Both in Simulation as in Hardware

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 815 ◽  
Author(s):  
Andrés Tobón ◽  
Julián Peláez-Restrepo ◽  
Jhon Montano ◽  
Mariana Durango ◽  
Jorge Herrera ◽  
...  
Keyword(s):  
Local Maximum ◽  
Pattern Search ◽  
Maximum Power ◽  
Global Maximum ◽  
Maximum Power Point ◽  
Partial Shading ◽  
Photovoltaic Panels ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

This article presents a method for the Maximum Power Point Tracking (MPPT) of a Photovoltaic (PV) panels array with partial shading, applying an Improved Pattern Search Method (IPSM). The method is simulated in PSIM @ and then implemented in hardware in the loop system, emulating the PV array on an industrial computer (Speedgoat) that allows real-time emulations and the IPSM is applied in an Arduino DUE. The experiments were carried out with TP245S-20/WD, KYOCERA KC200GT, YINGLY SOLAR JS65, and MSX60 photovoltaic panels. The results are the proper MPPT with changes in partial shading over time, inducing the increase and decrease of the maximum power point. The results obtained are the search for the global maximum power point in a matrix of panels in which, due to partial shading, it might have several local maximum power points, and thanks to the IPSM algorithm, it always manages to find the global maximum power point. Finally, the results are compared with other methods where it was found that IPSM had faster answers.

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