scholarly journals Identification of photovoltaic arrays' maximum power extraction point via dynamic regressor extension and mixing

2017 ◽  
Vol 31 (9) ◽  
pp. 1337-1349 ◽  
Author(s):  
Anton Pyrkin ◽  
Fernando Mancilla-David ◽  
Romeo Ortega ◽  
Alexey Bobtsov ◽  
Stanislav Aranovskiy
Keyword(s):  
Maximum Power ◽  
Power Extraction ◽  
Photovoltaic Arrays

Grid‐tie inverter topology with maximum power extraction from two photovoltaic arrays

2014 ◽  
Vol 8 (6) ◽  
pp. 638-648 ◽  
Author(s):  
Iván Patrao ◽  
Gabriel Garcerá ◽  
Emilio Figueres ◽  
Raúl González‐Medina
Keyword(s):  
Maximum Power ◽  
Power Extraction ◽  
Photovoltaic Arrays ◽  
Inverter Topology

A New Photovoltaic Arrays Fixed Reconfiguration Method for Reducing Effects of One- and Two-Sided Mutual Shading

2018 ◽  
Vol 141 (3) ◽  
Author(s):  
Majid Horoufiany ◽  
Reza Ghandhari
Keyword(s):  
Maximum Power ◽  
Power Losses ◽  
Power Extraction ◽  
Significant Power ◽  
Photovoltaic Arrays ◽  
Mutual Shading ◽  
Simulation Results

Low distance between photovoltaic (PV) arrays can lead to the mutual shading between them. This can lead to significant power losses. Usually, these shadows can be seen in PV plants with limited land such as buildings' roof. In this paper, a PV arrays fixed reconfiguration method is presented in order to reduce the effects of one- and two-sided mutual shadings in total cross tied (TCT) arrangements. Two-sided mutual shading appears when the array is shaded in two separate areas, while there is only one shaded part in the array in one-sided mutual shading. In this method, the physical locations of the modules are rearranged without changing the electrical interconnections. To reduce the effects of these shadings, first, their important features are explained. Then, the optimal array rearrangement is determined by considering all possible mutual shadows (MSHs). In mutual shading conditions, the obtained arrangement is capable of equally dispersing shaded modules in different array rows, while there is no need to add any additional switches or sensors. Due to this equal dispersion, there is no need to use the bypass diodes for maximum power extraction in this condition. The simulation results validate the effectiveness of this method.

Maximum Power Extraction from PV System Using Fuzzy Logic

2019 ◽  
Vol 7 (4) ◽  
pp. 835-840
Author(s):  
Dhruv M. Dhivar ◽  
M.B. Jhala ◽  
M. K. Kathiria
Keyword(s):  
Fuzzy Logic ◽  
Maximum Power ◽  
Pv System ◽  
Power Extraction

Design & Real-time Implementation of MIDO Converter Based PV Water Pumping System with BES

2020 ◽  
Vol 14 (2) ◽  
pp. 194-204
Author(s):  
Anuradha Tomar
Keyword(s):  
Real Time ◽  
Rural Areas ◽  
Maximum Power ◽  
Pump System ◽  
Partial Shading ◽  
Power Extraction ◽  
Pumping System ◽  
Point Tracking ◽  
Water Pumping ◽  
Battery Energy

Background: Despite so many developments, most of the farmers in the rural areas are still dependent on rainwater, rivers or water wells, for irrigation, drinking water etc. The main reason behind such dependency is non-connectivity with the National grid and thus unavailability of electricity. To extract the maximum power from solar photovoltaic (SPV) based system, implementation of Maximum Power Point Tracking (MPPT) is mandatory. PV power is intermittent in nature. Variation in the irradiation level due to partial shading or mismatching phenomena leads to the development of modular DC-DC converters. Methods: A stand-alone Multi-Input Dual-Output (MIDO) DC-DC converter based SPV system, is installed at a farm; surrounded with plants for water pumping with stable flow (not pulsating) along with battery energy storage (BES) for lighting. The proposed work has two main objectives; first to maximize the available PV power under shadowing and mismatching condition in case of series/ parallel connected PV modules and second is to improve the utilization of available PV energy with dual loads connected to it. Implementation of proposed MIDO converter along with BES addresses these objectives. First, MIDO controller ensures the MPPT operation of the SPV system to extract maximum power even under partial shading condition and second, controls the power supplied to the motor-pump system and BES. The proposed system is simulated in MATLAB/ SIMULINK environment. Real-time experimental readings under natural sun irradiance through hardware set-up are also taken under dynamic field conditions to validate the performance. Results and Conclusion: The inherent advantage of individual MPPT of each PV source in MIDO configuration, under varying shadow patterns due to surrounding plants and trees is added to common DC bus and therefore provides a better impact on PV power extraction as compared to conventional PV based water pumping system. Multi-outputs at different supply voltages is another flag of MIDO system. Both these aspects are implemented and working successfully at 92.75% efficiency.

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