The Impact Mitigation of Partial Shading on PV Array Power Generation

2015 ◽  
Vol 781 ◽  
pp. 267-271
Author(s):  
Santisouk Phiouthonekham ◽  
Anucha Lekkruasuwan ◽  
Surachai Chaitusaney
Keyword(s):  
Power Generation ◽  
Solar Irradiation ◽  
Testing System ◽  
Partial Shading ◽  
Pv Array ◽  
Pv Module ◽  
Time Period ◽  
Current Voltage ◽  
Pv Modules ◽  
The Impact

The impact of partial shading on photovoltaic (PV) array is discussed in this paper. The partial shading on PV array can significantly decrease the power generation of PV array. This study examines the modeling of PV module which relates with solar irradiation, temperature, and shading pattern. There are different shading patterns on PV array, such as one-string shading, two-strings shading, and much more. The characteristics of current-voltage (I-V) and voltage-power (V-P) curves for each individual the PV array can be different dependent on the multiple MPPs, maximum power points (MPPs). These multiple MPPs are basically lower than the MPP in case of no shading. Therefore, the total generated energy in an interested time period is usually reduced. As a result, this paper proposes the appropriate arrangement of PV modules in a PV array in order to mitigate the impact of partial shading. Finally, the proposed arrangement of PV modules is tested in a testing system. All the obtained results confirms that the proposed arrangement of PV modules is effective and can be applied in practice.

scholarly journals Modeling of Photovoltaic Module Using the MATLAB

2019 ◽  
Vol 9 ◽  
pp. 59-69
Author(s):  
Alok Dhaundiyal ◽  
Divine Atsu
Keyword(s):  
Standard Test ◽  
Electrical Performance ◽  
Photovoltaic Module ◽  
Solar Pv ◽  
Pv Module ◽  
Proposed Model ◽  
Current Voltage ◽  
Pv Modules ◽  
The Impact ◽  
The Mathematical Model

This paper presents the modeling and simulation of the characteristics and electrical performance of photovoltaic (PV) solar modules. Genetic coding is applied to obtain the optimized values of parameters within the constraint limit using the software MATLAB. A single diode model is proposed, considering the series and shunt resistances, to study the impact of solar irradiance and temperature on the power-voltage (P-V) and current-voltage (I-V) characteristics and predict the output of solar PV modules. The validation of the model under the standard test conditions (STC) and different values of temperature and insolation is performed, as well as an evaluation using experimentally obtained data from outdoor operating PV modules. The obtained results are also subjected to comply with the manufacturer’s data to ensure that the proposed model does not violate the prescribed tolerance range. The range of variation in current and voltage lies in the domain of 8.21 – 8.5 A and 22 – 23 V, respectively; while the predicted solutions for current and voltage vary from 8.28 – 8.68 A and 23.79 – 24.44 V, respectively. The measured experimental power of the PV module estimated to be 148 – 152 W is predicted from the mathematical model and the obtained values of simulated solution are in the domain of 149 – 157 W. The proposed scheme was found to be very effective at determining the influence of input factors on the modules, which is difficult to determine through experimental means.

scholarly journals Shadow dispersion of PV Array under variable irradiance for superior power Generation by Magic Square Configuration

2018 ◽  
Vol 7 (1.8) ◽  
pp. 172 ◽  
Author(s):  
G Sreenivasa Reddy ◽  
T Bramhananda Reddy ◽  
M Vijaya Kumar
Keyword(s):  
Power Generation ◽  
Power Loss ◽  
Electrical Power ◽  
Partial Shading ◽  
Magic Square ◽  
Photovoltaic Modules ◽  
Pv Array ◽  
Pv Modules ◽  
Square Configuration ◽  
Comparison Data

The PV array generates smaller amount of the power compared with other electrical power generation components. There are many components that are adversely effected the output of PV array in such components, one is partial shading. Due to this, each module in PV array receives different solar irradiations causes different P-V characteristics of its peak values. This paper presents a pioneering method called as Magic Square configuration has been proposed to enhance the generated power of photovoltaic modules by configuring those are under affect of shade. Thus there is no change of electrical arrangement of PV modules in an array but only the objective location in the total cross tied (TCT) array is rearranged according to the magic square arrangement. Proposed paper gives comparison data with the conventional configuration method and hence the performance is calculated. The proposed technique provides a better solution that how shadow effect on the PV  modules has been reduced and how this shadow is distributed, and not only that also gives an idea  about how the inequality losses due to the partial shading is effectively reduced. The power loss of  various configurations of 3X3 and 4X4 array has been compared. The proposed technique is validated through MATLAB/Simulink environment. 

scholarly journals Reconfiguration Method to Extract More Power from Partially Shaded Photovoltaic Arrays with Series-Parallel Topology

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1439 ◽  
Author(s):  
Xiaoguang Liu ◽  
Yuefeng Wang
Keyword(s):  
Power Generation ◽  
Partial Shading ◽  
Pv Array ◽  
Pv Panel ◽  
Pv Module ◽  
In Series ◽  
Mismatch Loss ◽  
Partial Shade ◽  
Improved Performance ◽  
Power Point

A photovoltaic (PV) array is composed of several panels connected in series-parallel topology in most actual applications. However, partial shading of a PV array can dramatically reduce power generation. This paper presents a new reconfiguration method to extract more power from PV arrays under partial shade conditions. The method is designed using the effective maximum power point current and voltage of a PV panel. Its advantages involve (i) the method reconfigures the PV array without measuring the irradiance profile, and (ii) the reconfiguration is executed on the level of a PV module. Based on these two aspects, the method disperses the shade uniformly within the PV array, reducing the mismatch loss significantly and increasing power generation. The performance of the proposed method is investigated for different shade patterns and results show improved performance under partial shade conditions.

scholarly journals Current Flow Analysis of PV Arrays under Voltage Mismatch Conditions and an Inverter Failure

2019 ◽  
Vol 9 (23) ◽  
pp. 5163 ◽  
Author(s):  
Woo Gyun Shin ◽  
Jong Rok Lim ◽  
Gi Hwan Kang ◽  
Young Chul Ju ◽  
Hye Mi Hwang ◽  
...  
Keyword(s):  
Current Flow ◽  
Flow Analysis ◽  
Reverse Current ◽  
Open Circuit ◽  
Electrical Characteristics ◽  
Partial Shading ◽  
Pv Array ◽  
Pv Module ◽  
Parallel Circuits ◽  
Pv Modules

In PV (Photovoltaic) systems, the PV array is a structure in which many PV strings are connected in parallel. The voltage mismatch between PV strings, in which PV modules are connected in a series, occurs due to a voltage decrease in some modules. In this paper, research on the electrical characteristics of PV arrays due to a voltage mismatch was conducted. Considering the voltage mismatch, experiments on partial shading, the non-uniformity of irradiance, and the failure of bypass diodes were conducted on the PV module level. It was confirmed that the open-circuit voltage greatly decreased due to the failure of bypass diodes, which is among the causes of voltage mismatch. From the simulation results at the PV array level, it can be seen that a reverse current flowed into the low-potential string, which includes PV modules, causing the failure of the bypass diodes. Measuring the reverse current at one low-potential string, it was found that, in four parallel circuits, the reverse current was 12 A. For this reason, in large PV plants, an overcurrent can flow into the fuse due to the potential difference between strings, causing an output decrease of PV plants and the burnout of fuses.

scholarly journals Exhaustive Study of the PV Module Implemented in the Region of Annaba-Algeria

2020 ◽  
Vol 57 (6) ◽  
pp. 65-74
Author(s):  
A. Dekhane ◽  
B. Lamri ◽  
N. Benamira
Keyword(s):  
Renewable Energy Sources ◽  
Coastal Region ◽  
Climatic Conditions ◽  
Photovoltaic Module ◽  
Cell Temperature ◽  
Partial Shading ◽  
Pv Module ◽  
Current Voltage ◽  
Exhaustive Study ◽  
The Impact

AbstractAlgeria, like any other country, has drawn up its roadmap for the use and promotion of renewable energy sources. Motivated by its commitment to the international community in the fight against global warming and its possession of one of the largest solar fields in the world, a series of laws and institutions have consolidated this ambitious schedule. As known, both the climate and the geological area of Algeria take place among the foremost favoured countries in the field of solar energy. The present paper aims at proposing a simple model of photovoltaic module.The authors used Matlab/Simulink software to predict the current-voltage and power-voltage characteristics according to the influence of several factors, such as solar irradiance, cell temperature and series resistance, on the efficiency of photovoltaic module. The proposed experimental investigation can easily predict the curves (current-voltage and power-voltage) of a PV module, where both of simulation and practical results are identical. A single-crystal-line photovoltaic module was introduced close to Badji-Mokhtar Annaba University, Annaba (Algeria) to show the impact of climatic conditions in this coastal region and partial shading on characteristics.

scholarly journals Evaluation of Mathematical Model to Characterize the Performance of Conventional and Hybrid PV Array Topologies under Static and Dynamic Shading Patterns

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3216 ◽  
Author(s):  
Manoharan Premkumar ◽  
Umashankar Subramaniam ◽  
Thanikanti Sudhakar Babu ◽  
Rajvikram Madurai Elavarasan ◽  
Lucian Mihet-Popa
Keyword(s):  
Mathematical Model ◽  
Performance Analysis ◽  
Fill Factor ◽  
Partial Shading ◽  
Pv Systems ◽  
Pv Array ◽  
Pv Module ◽  
Pv Modules ◽  
Power Maximization ◽  
Global Peak

The analysis and the assessment of interconnected photovoltaic (PV) modules under different shading conditions and various shading patterns are presented in this paper. The partial shading conditions (PSCs) due to the various factors reduce the power output of PV arrays, and its characteristics have multiple peaks due to the mismatching losses between PV panels. The principal objective of this paper is to model, analyze, simulate and evaluate the performance of PV array topologies such as series-parallel (SP), honey-comb (HC), total-cross-tied (TCT), ladder (LD) and bridge-linked (BL) under different shading patterns to produce the maximum power by reducing the mismatching losses (MLs). Along with the conventional PV array topologies, this paper also discusses the hybrid PV array topologies such as bridge-linked honey-comb (BLHC), bridge-linked total-cross-tied (BLTCT) and series-parallel total-cross-tied (SPTCT). The performance analysis of the traditional PV array topologies along with the hybrid topologies is carried out during static and dynamic shading patterns by comparing the various parameters such as the global peak (GP), local peaks (LPs), corresponding voltage and current at GP and LPs, fill factor (FF) and ML. In addition, the voltage and current equations of the HC configuration under two shading conditions are derived, which represents one of the novelties of this paper. The various parameters of the SPR-200-BLK-U PV module are used for PV modeling and simulation in MATLAB/Simulink software. Thus, the obtained results provide useful information to the researchers for healthy operation and power maximization of PV systems.

scholarly journals Experimental Investigation of PV Array Interconnection Topologies at Nonuniform Aging Condition for Power Maximization

2020 ◽  
Vol 6 (1) ◽  
pp. 39-45
Author(s):  
AA Mansur ◽  
MAU Haq ◽  
Md H Maruf ◽  
ASM Shihavuddin ◽  
Md R Amin ◽  
...  
Keyword(s):  
Output Power ◽  
Power Production ◽  
Aging Condition ◽  
Science And Engineering ◽  
Pv Array ◽  
Pv Module ◽  
Current Voltage ◽  
Pv Modules ◽  
Power Maximization ◽  
Array Output

In vast Photovoltaic (PV) power plant the output power production decreases significantly due to the fact of non-uniform aging of PV modules. The non-uniform aging of PV modules increases current-voltage (I-V) mismatch among the array modules and causes mismatch power loss (MPL). There are different interconnection topologies of the PV module in an array to minimize MPL and thus maximize the array output power. This paper investigates four different interconnection topologies experimentally on a 4×4 nonuniformly aged PV array. Three different patterns of PV module rearrangement are used to investigate the performance of each interconnection topology in terms of array output power and MPL. The experimental results show that the proposed interconnection topology is yields about 3.28% (average) higher output power than that of the most commonly used series-parallel array topology. GUB JOURNAL OF SCIENCE AND ENGINEERING, Vol 6(1), Dec 2019 P 39-45

scholarly journals Analysis Of Power Generation Photovoltaic Array 9×10 Wp Under Shading Effect

2020 ◽  
Vol 3 (1) ◽  
pp. 13-16
Author(s):  
Dwi Prima Putri Utami ◽  
Antonius Rajagukguk
Keyword(s):  
Power Generation ◽  
Output Power ◽  
Large Scale ◽  
Characteristic Curves ◽  
Shading Effect ◽  
Pv Systems ◽  
Photovoltaic Array ◽  
Pv Array ◽  
Pv Module ◽  
Current Voltage

There are several problems that can interfere with the performance of large-scale PV. One that enhances PV performance is shading on a PV module, that make interferes PV performance. This research studied about the effect of shading on the performance of large-scale PV systems through testing a 9 × 10 Wp miniature PV array and simulation using Matlab software. The use of diodes on a PV module can be done to prevent damage to the PV module due to shading. Through the power-voltage (P-V) and current-voltage (I-V) characteristic curves the effect of shading and the use of bypass and blocking diodes can be determined. Shading effect gave in a decrease in power in the PV module. From the results of this study note that the bypass diode and blocking diode output power generated by the PV module can be optimal.

scholarly journals Application of the Double Diode Model of Photovoltaic Cells for Simulation Studies on the Impact of Partial Shading of Silicon Photovoltaic Modules on the Waveforms of Their Current–Voltage Characteristic

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2421 ◽  
Author(s):  
Mariusz T. Sarniak ◽  
Jacek Wernik ◽  
Krzysztof J. Wołosz
Keyword(s):  
Computer Simulation ◽  
Classical Method ◽  
Photovoltaic Cells ◽  
Photovoltaic System ◽  
Partial Shading ◽  
Photovoltaic Modules ◽  
Solar Radiation Intensity ◽  
Current Voltage ◽  
Pv Modules ◽  
The Impact

Photovoltaics (PV) is the phenomenon of converting sun energy into electric energy by using photovoltaic cells. Furthermore, solar energy is the major renewable energy source. PV modules are systematically more efficient and manufacturing costs decrease at the same time. The PV module performance is affected by ambient temperature, humidity, wind speed, rainfall, incident solar radiation intensity and spectrum, dust deposition, pollution, and shading, which are environmental factors. The problem of partial shading of the generator often arises when designing photovoltaic installations. If it is not possible to avoid this phenomenon, its impact on the operation of the photovoltaic system should be estimated. The classical method is to measure the current–voltage characteristics, but it requires switching off the installation for the duration of the measurements. Therefore, this paper proposes a method using a computer simulation in the Matlab package with the implemented component “Solar Cell” for this purpose. Three cases of partial shading of photovoltaic modules with different degrees of shading were analyzed. The obtained results of the computer simulation were verified for two types of silicon PV modules: Mono- and polycrystalline.

scholarly journals A Simple Mismatch Mitigating Partial Power Processing Converter for Solar PV Modules

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2308
Author(s):  
Kamran Ali Khan Niazi ◽  
Yongheng Yang ◽  
Tamas Kerekes ◽  
Dezso Sera
Keyword(s):  
Experimental Tests ◽  
Energy Yield ◽  
Power Electronic ◽  
Solar Pv ◽  
Partial Shading ◽  
Loss Analysis ◽  
Pv Systems ◽  
Pv Module ◽  
Pv Modules ◽  
In Series

Partial shading affects the energy harvested from photovoltaic (PV) modules, leading to a mismatch in PV systems and causing energy losses. For this purpose, differential power processing (DPP) converters are the emerging power electronic-based topologies used to address the mismatch issues. Normally, PV modules are connected in series and DPP converters are used to extract the power from these PV modules by only processing the fraction of power called mismatched power. In this work, a switched-capacitor-inductor (SCL)-based DPP converter is presented, which mitigates the non-ideal conditions in solar PV systems. A proposed SCL-based DPP technique utilizes a simple control strategy to extract the maximum power from the partially shaded PV modules by only processing a fraction of the power. Furthermore, an operational principle and loss analysis for the proposed converter is presented. The proposed topology is examined and compared with the traditional bypass diode technique through simulations and experimental tests. The efficiency of the proposed DPP is validated by the experiment and simulation. The results demonstrate the performance in terms of higher energy yield without bypassing the low-producing PV module by using a simple control. The results indicate that achieved efficiency is higher than 98% under severe mismatch (higher than 50%).

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