scholarly journals Maximizing Power Output of a Partially Shaded Total-Cross-Tied Photovoltaic array

2017 ◽  
Vol 2 (1) ◽  
pp. 10 ◽  
Author(s):  
Neha Saurabh Shah ◽  
Hiren H Patel
Keyword(s):  
Output Power ◽  
Power Output ◽  
Control Algorithm ◽  
Partial Shading ◽  
Current Compensation ◽  
Matlab Simulink ◽  
Photovoltaic Array ◽  
Pv Array ◽  
Higher Power ◽  
Simulation Results

Non-uniform conditions on the modules of the PV array, especially, partial shading reduces the output of the PV array to a large extent. The shaded module in a string limits the current of the entire string and hence, the output power of the string.  The output power under such conditions is reported to be higher for total-cross-tied (TCT) configuration. This paper describes two different approaches, one based on current compensation (current equalization) and another based on voltage equalization, to extract higher power from the partially shaded total-cross-tied photovoltaic array. The TCT configuration is considered to minimize the number of converters, sensors, cost and complexity involved. The additional converters in the two distinct approaches evaluated here operate only when the partial shading occurs and are controlled to minimize the current and voltage miss-matches. The analysis and the control algorithm are presented. Simulation results obtained in MATLAB/Simulink are included to demonstrate the effectiveness of both methods and the relative merits and demerits of these approaches are highlighted.

scholarly journals Development of PV array configuration under different partial shading condition

2019 ◽  
Vol 10 (3) ◽  
pp. 1263
Author(s):  
Mohammad Syahir Bin Ishak ◽  
Rahmatul Hidayah Salimin ◽  
Ismail Musirin ◽  
Zulkiffli Abdul Hamid
Keyword(s):  
Natural Condition ◽  
Partial Shading ◽  
Matlab Simulink ◽  
Array Configuration ◽  
Photovoltaic Array ◽  
Pv Array ◽  
System Engineer ◽  
Overall Efficiency ◽  
Output Characteristics ◽  
Configuration Scheme

This paper investigates the performances of different photovoltaic (PV) array under several shading condition. Four types of photovoltaic array configuration scheme which are ‘Series’ (S), Series-Parallel’ (SP), Total-Cross-Tied’ (TCT), and ‘Bridge-Link’ (BL) array topologies were tested by applying a 6x6 PV array under 6 different shading scenarios. The modeling is developed using Matlab/Simulink. The performances and output characteristics of photovoltaic array are compared and analyzed. System engineer can use the detailed characteristics of different array configuration to approximate the outcome power and pick the best configuration of the system by concerning the current natural condition to enhance the overall efficiency.

scholarly journals Minimization of Losses in Solar Photovoltaic Modules by Reconfiguration under Various Patterns of Partial Shading

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 24 ◽  
Author(s):  
Chayut Tubniyom ◽  
Rongrit Chatthaworn ◽  
Amnart Suksri ◽  
Tanakorn Wongwuttanasatian
Keyword(s):  
Output Power ◽  
Total Output ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Partial Shading ◽  
Photovoltaic Modules ◽  
Pv Array ◽  
Higher Power ◽  
Pv Modules ◽  
The Ideal

Configurations of photovoltaic (PV) modules, such as series-parallel (SP), bridge-linked (BL), and total cross-tied (TCT) configurations, always utilize a number of connecting switches. In a simulation, the ideal switch with no loss is used to optimize the reconfiguration method for a solar PV array. However, in practice, the switches are non-ideal, causing losses and resulting in a decrease in the total output power of the PV array. In this work, MATLAB/Simulink (R2016a) was employed to simulate nine PV modules linked in a 3 × 3 array, and they were reconfigured using series-parallel (SP), bridge-linked (BL), and total cross-tied (TCT) configurations for both ideal and non-ideal switch cases. It was not surprising that non-ideal switches deteriorated the output power compared with ideal cases. Then, the minimization of losses (ML) configuration was proposed by minimizing the number of switches to give the highest output power. A 5% higher power output was set as the criterion to reconfigure the PV modules when partial shading occurred. The results showed that if 50% or more of the area was partially shaded, reconfiguration was unnecessary. On the other hand, when the shaded area was less than 50%, reconfiguration gave a significant increase in power. Finally, the ML method had different configurations for various shading patterns, and provided better results than those of the TCT method.

scholarly journals Differential Evolution Based Solar Photovoltaic Array Reconfiguration Algorithm for Optimal Energy Extraction during Partial Shading Condition

2018 ◽  
Vol 9 (3) ◽  
pp. 1397
Author(s):  
M. A. I. A. Tazally ◽  
M. F. N. Tajuddin ◽  
A. Azmi ◽  
S. M. Ayob ◽  
T. Sutikno
Keyword(s):  
Differential Evolution ◽  
Control Algorithm ◽  
Pso Algorithm ◽  
Total Output ◽  
Energy Yield ◽  
Partial Shading ◽  
Photovoltaic Array ◽  
Pv Array ◽  
Switching Matrix ◽  
A New Technique

To increase energy yield from an installed photovoltaic (PV) array, particularly during partial shading condition (PSC), a new technique based on reconfigurable PV array interconnection is proposed in this work. The proposed technique works by dynamically changing the interconnection of PV modules to form a new configuration using a switching matrix inside the array. The criteria of good reconfigurable PV array interconnection techniques depend on the efficiency and accuracy of the control algorithm to optimally reconfigure the PV array to maximize the total output power. Hence, this paper proposes a new control algorithm using differential evolution (DE) for photovoltaic array reconfiguration (PVAR). To verify the superiority of the proposed algorithm, DE is compared with the particle swarm optimization (PSO) algorithm. Results confirm that DE performs well in terms of the amount of energy production during PSC. For all the nine shading patterns tested on a 3 × 3 PV array, DE yields 1% to 5% more power than PSO.

scholarly journals An Experimental Investigation on Photovoltaic Array Power Output Affected by the Different Partial Shading Conditions

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2344
Author(s):  
Ghoname Abdullah ◽  
Hidekazu Nishimura ◽  
Toshio Fujita
Keyword(s):  
Experimental Investigation ◽  
Power Output ◽  
Maximum Power ◽  
Photovoltaic Module ◽  
Partial Shading ◽  
Output Loss ◽  
Array Configuration ◽  
Photovoltaic Array ◽  
Pv Array ◽  
Current Maximum

This paper presents an experimental investigation on photovoltaic array (PV array) power output affected by partial shading conditions (PSCs). An experiment setup of a PV array with a series configuration using 2 × 4 photovoltaic modules (PV modules) was built. The power output loss due to the shading effect on the first photovoltaic cells (PV cell) connected with bypass diodes of each photovoltaic module, installed in the PV array in the horizontal direction, was evaluated. Depending on the direction of the sun relative to the PV array configuration, the shading percentage was measured during the test and recorded the current and voltage of the PV array. The performance evaluation of the PV array configurations is referred to with respect to the values of maximum power voltage, the maximum power current, maximum power output, power output losses and fill factor (FF). The experimental results show that 44% shading of the first PV cells affects PV array power output loss by more than 80%.

scholarly journals Improved Power Generation From PV Array Under Partial Shading Conditions by Shade Distribution Using Magic Square View Configuration

2019 ◽  
Author(s):  
LAHCEN
Keyword(s):  
Power Generation ◽  
Local Maximum ◽  
Maximum Power ◽  
Power Losses ◽  
Partial Shading ◽  
Matlab Simulink ◽  
Magic Square ◽  
Pv Array ◽  
Output Characteristics ◽  
Global Peak

The main purpose of this paper is to model, simulate, and improve the performance of different 9 × 9 PV array configurations under different Partial Shading Conditions (PSCs) in order to extract the maximum power by defeat the mismatching power losses. Hence, PSCs reduces the performance of Photovoltaic (PV) arrays and increase the Local Maximum Power Points (LMPPs) on output characteristics P-V due to mismatching power losses between the PV panels. For this, Total-CrossTied (TCT) , and proposed Magic Square View (MSV) PV array topologies are considered for the study under Short Narrow shading patterns. PV array configurations enhancements and theirinvestigations are carried out with regard to the comparison of the Global peak of outlet power (GP).The parameters of the PV array configurations are performed in MATLAB/Simulink software.

Odd-Even-Prime pattern for PV array to increase power output under partial shading conditions

Energy ◽  
2020 ◽  
Vol 213 ◽  
pp. 118780
Author(s):  
S. Sreekantha Reddy ◽  
Chandrasekhar Yammani
Keyword(s):  
Power Output ◽  
Partial Shading ◽  
Pv Array

Photovoltaic Array Modeling under Uniform Irradiation and Partial Shading Condition

2017 ◽  
Vol 6 (3) ◽  
pp. 144
Author(s):  
Lunde Ardhenta ◽  
Wijono Wijono
Keyword(s):  
Solar Energy ◽  
Maximum Power Point ◽  
Partial Shading ◽  
Array Configuration ◽  
Photovoltaic Array ◽  
Pv Array ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Temperature Irradiation ◽  
Power Point

Wind energy and solar energy are the prime energy sources which are being utilized for renewal energy. The performance of a photovoltaic (PV) array for solar energy is affected by temperature, irradiation, shading, and array configuration. Often, the PV arrays are shadowed, completely or partially, by the passing clouds, neighboring buildings and towers, trees, and utility and telephone poles. Under partially shaded conditions, the PV characteristics are more complex with multiple peaks, hence, it is very important to understand and predict the MPP under PSC in order to extract the maximum possible power. This paper presents the development of PV array simulator for studying the I–V and P–V characteristics of a PV array under a partial shading condition. It can also be used for developing and evaluating new maximum power point tracking techniques, for PV array with partially shaded conditions. It is observed that, for a given number of PV modules, the array configuration significantly affects the maximum available power under partially shaded conditions. This is another aspect to which the developed tool can be applied. The model has been experimentally validated and the usefulness of this research is highlighted with the help of several illustrations

Output Power Comparison of TCT & SP Topologies for Easy-to-Predict Partial Shadow on a 4×4 PV Field

2014 ◽  
Vol 612 ◽  
pp. 71-76 ◽  
Author(s):  
Smita Pareek ◽  
Ratna Dahiya
Keyword(s):  
Output Power ◽  
Photovoltaic System ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Power Comparison ◽  
Partial Shading ◽  
Pv Array ◽  
Solar Photovoltaic System

The power generated by solar photovoltaic system depends on insolation, temperature and shading situation etc. These days’ solar PV arrays are mainly building integrated. Therefore PV array are often under partial shadow. The feature of these shadows can be either easy-to-predict (like neighbour’s chimney, nearby tree or neighbouring buildings) or difficult-to-predict (passing clouds, birds litter).Thus output power obtained by PV arrays decreases in a considerable manner. In this paper, output powers, currents and voltages for SP & TCT topologies are calculated for different patterns of easy-to-predict partial shading conditions on a 4×4 PV field.

scholarly journals Modeling and Relative Research of Solar Photovoltaic Array Topologies Under Partial Shading Conditions

2019 ◽  
Vol 8 (11) ◽  
pp. 340-346
Keyword(s):  
Fill Factor ◽  
Electrical Power ◽  
Solar Photovoltaic ◽  
Power Losses ◽  
Partial Shading ◽  
Photovoltaic Array ◽  
Pv Array ◽  
Pv Module ◽  
And Performance ◽  
Zigzag Type

The electrical power generation from solar photo voltaic arrays increases by reducing partial shading effect due to the deposition of dust in modules, shadow of nearby buildings, cloud coverage leads to mismatching power losses. This paper gives the detailed analysis of modeling, simulation and performance analysis of different 4x4 size PV array topologies under different irradiance levels and to extract output power of panels maximum by reducing the mismatching power losses. For this analysis, a comparative study of six PV array topologies are Series, Parallel, Series-Parallel, Total-Cross-Tied, Bridge Linked and Honey-Comb are considered under various shading conditions such as one module shading, one string shading, zigzag type partial shading and total PV array partially shaded cases. The performance of above six topologies are compare with mismatching power losses and fill-factor. For designing and simulation of different PV array configurations/topologies in MaTLab/Simulink, the LG Electronics LG215P1W PV module parameters are used in all PV modules.

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