scholarly journals Adaptive switch matrix for PV module connections to avoid permanent cross-tied link in PV array system under non-uniform irradiations

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Rupendra Kumar Pachauri ◽  
Hassan Haes Alhelou ◽  
Jianbo Bai ◽  
M.E.H. Golshan
Keyword(s):  
Pv Array ◽  
Pv Module ◽  
Adaptive Switch

scholarly journals Study on the Influence of Mounting Dimensions of PV Array on Module Temperature in Open-Joint Photovoltaic Ventilated Double-Skin Façades

2021 ◽  
Vol 13 (9) ◽  
pp. 5027
Author(s):  
Wenjie Zhang ◽  
Tongdan Gong ◽  
Shengbing Ma ◽  
Jianwei Zhou ◽  
Yingbo Zhao
Keyword(s):  
Heat Dissipation ◽  
Temperature Drop ◽  
Vertical Direction ◽  
Wind Pressure ◽  
Pv Array ◽  
Pv Module ◽  
Pv Modules ◽  
Double Skin ◽  
Open Joint ◽  
Double Skin Facades

In building integrated photovoltaics (PV), it is important to solve the heat dissipation problem of PV modules. In this paper, the computational fluid dynamics (CFD) method is used to simulate the flow field around the open-joint photovoltaic ventilated double-skin façades (OJ-PV-DSF) to study the influence of the mounting dimensions (MD) of a PV array on the module temperature. The typical summer afternoon meteorological parameters, such as the total radiation (715.4 W/m2), the outdoor temperature (33.1 °C), and the wind speed (2.0 m/s), etc., are taken as input parameters. With the DO (discrete ordinates) model and the RNG (renormalization-group) k − ε model, a steady state calculation is carried out to simulate the flow of air in and around the cavity under the coupling of hot pressure and wind pressure, thereby obtaining the temperature distribution of the PV array and the wall. In addition, the simulation results are compared with the onsite experimental data and thermal imaging to verify the accuracy of the CFD model. Then three MD of the open joints are discussed. The results show that when the a value (represents the distance between PV modules and wall) changes from 0.05 to 0.15, the temperature drop of the PV module is the most obvious, reaching 2.0 K. When the b value (representing the distance between two adjacent PV modules in the vertical direction) changes from 0 to 0.1, the temperature drop of the PV module is most obvious, reaching 1 K. When the c value (represents the distance between two adjacent PV modules in the horizontal direction) changes from 0 to 0.1, the temperature of the PV module is lowered by 0.8 K. Thus, a = 0.1–0.15, b = 0.1 and c = 0.1 are recommended for engineering applications to effectively reduce the module temperature.

Solar Array and Battery Sizing for a Photovoltaic Building in Malaysia

2013 ◽  
Vol 64 (4) ◽  
Author(s):  
Hadi Nabipour Afrouzi ◽  
Saeed Vahabi Mashak ◽  
Zulkurnain Abdul-Malek ◽  
Kamyar Mehranzamir ◽  
Behnam Salimi
Keyword(s):  
Minimum Cost ◽  
Solar Irradiation ◽  
Solar Array ◽  
Pv System ◽  
Pv Array ◽  
Pv Module ◽  
Mathematical Equations ◽  
The One ◽  
The Right ◽  
The Cost

Renewable energy plays an important role in the national energy policy especially in reducing greenhouse gas emissions. For a photovoltaic (PV) system, one important consideration is the cost of the system. One needs to select the best PV array from a range of selection, that is, the one which is the most efficient and with a best price. This article illustrates a method to compute the size and cost of a required PV array, and then after to compute the required battery for the case of a photovoltaic building in Malaysia. The computation is simulated using Matlab integrated with suitable mathematical equations. The generated current and power of the PV array are calculated for daily solar irradiation in Malaysia. The computation enables the user to quickly compute the initial cost needed to be spent if a given PV system is to be installed. A typical building requiring 12 kWh daily energy with 6 kW peak demand load was shown to need at least 114 solar modules at a cost of about RM53k. It is noted that the main cost of the whole PV system is mainly contributed by the cost of the chosen PV array. Hence, the right choice of a PV module is vital in achieving the minimum cost.

scholarly journals Field Measurement of PV Array Temperature for Tracking and Concentrating 1 k WpGenerators Installed in Malaysia

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
M. Effendy Ya’acob ◽  
H. Hizam ◽  
M. Amran M. Radzi ◽  
M. Z. A. A. Kadir
Keyword(s):  
Surface Temperature ◽  
Weather Conditions ◽  
Effect Of Temperature ◽  
Bottom Temperature ◽  
Cell Temperature ◽  
Pv Array ◽  
Pv Module ◽  
The Difference ◽  
Ground Condition ◽  
Pv Generator

The effect of temperature elements for PV array with tracking and concentrating features installed in the tropical ground condition is presented. The temperature segment covers ambient temperature and surface and bottom temperature for three types of PV generator systems, namely, Fixed Flat (FF), Tracking Flat (TF), and Concentrating PV (CPV) generators. The location of measuring the cell temperature,Tcfor the PV module is still being debated by researchers with the issue of how much the cell temperature (Tc) is being affected by the surface temperature (Ts), bottom temperature (Tb), and surrounding temperature (Ta) furthermore when it is located in fluctuating weather conditions. In this study,ΔTis calculated based on the difference between surface temperature and bottom-side temperaturewhichever the highest recorded at site for different kinds of PV generator systems but using the same CEEG 95 W monocrystalline PV module. The study embraces the direct correlation of various temperature elements in tropical-based condition withΔTvalues of 2.19°C for FF module, 2.22°C for TF module, and 2.72°C for CPV module. These values which reflect the different unique configurations are further analyzed using multiple linear regression (MLR) and analysis of variance (ANOVA) test forTarraymodels. This study supports the continuous research in adapting PV technology for Malaysia.

Analysis of Photovoltaic (PV) Module during Partial Shading based on Simplified Two-Diode Model

2015 ◽  
Vol 16 (1) ◽  
pp. 15-21 ◽  
Author(s):  
B. Chitti Babu ◽  
Suresh Gurjar ◽  
Ashish Meher
Keyword(s):  
Solar Irradiance ◽  
Computational Time ◽  
Pv System ◽  
Partial Shading ◽  
Multiple Peaks ◽  
Array Configuration ◽  
Pv Array ◽  
Adverse Condition ◽  
Pv Module

Abstract Generally, the characteristics of photovoltaic (PV) array are largely affected by solar temperature, solar irradiance, shading patterns, array configuration and location of shading modules. Partial shading is due to moving clouds and shadows of nearby obstacles and can cause a significant degradation in the output of PV system. Hence, the characteristics of PV array get more multifaceted with multiple peaks. The ultimate aim of the paper is to analyze the performance of PV module during such adverse condition based on simplified two-diode model. To reduce the computational time, the simplified two-diode model has a photocurrent source in parallel with two ideal diodes. Only four parameters are required to be calculated from datasheet in order to simulate the model. Moreover, the performance of PV array is evaluated at different shaded patterns and it is found that the model has less computational time and gives accurate results.

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.

Various Techniques of MPPT Based Charge Controller and Comparison of A/C with D/C Home Appliances - A Review

2021 ◽  
Vol 34 (1) ◽  
pp. 87-95
Author(s):  
Gajendra Singh Rathore ◽  
B. Gopal Krishna ◽  
R.N. Patel ◽  
Sanjay Tiwari
Keyword(s):  
Maximum Power ◽  
Control Algorithms ◽  
Maximum Power Point ◽  
Dc System ◽  
Pv Array ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Pv Module ◽  
Power Point ◽  
Pv Generation

Controlling the PV array to generate the maximum power at certain environment conditions, the efficiency of the PV generation system could be improved. Using control algorithms, the PV array can operate at the maximum power point. This self-optimization process is referred as Maximum power point tracking (MPPT). A maximum power point tracker (MPPT) is a power electronic DC-DC converter inserted between the PV array and its load to achieve optimum matching. Researchers have studied and developed numerous methods and used many algorithms to track the Maximum power point of PV Module and extract maximum power using MPPT technique. This review article accumulates various algorithms through which MPPT could be attained and assists the researchers to understand the principle of their working. The paper also gives an idea to about less explored DC appliances and their viabilities in existing and proposed DC system.

Effects of Partial Shading on the PV Module Characteristic Curves

2010 ◽  
Vol 670 ◽  
pp. 391-398 ◽  
Author(s):  
Eva Paraskevadaki ◽  
S. Papathanassiou ◽  
Georgios Vokas
Keyword(s):  
System Performance ◽  
Significant Contribution ◽  
Photovoltaic System ◽  
Partial Shading ◽  
Array Configuration ◽  
Module Design ◽  
Pv Array ◽  
Pv Module ◽  
Pv Generator ◽  
Mismatch Losses

Photovoltaic system performance is influenced by a variety of factors such as irradiance, temperature, shading, degradation, mismatch losses, soiling, etc. Especially shading, complete or partial, can have a significant contribution to the reduction of power output, depending mainly on the PV array configuration, the shading pattern and the existence of bypass diodes incorporated in the PV module design. In order to obtain the maximum power from a PV generator, it is of great importance to evaluate the complex effects of shading on the P-V and I-V curves.

scholarly journals Long-Term Reliability Evaluation of Silica-Based Coating with Antireflection Effect for Photovoltaic Modules

Coatings ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 49 ◽  
Author(s):  
Kensuke Nishioka ◽  
So Pyay Moe ◽  
Yasuyuki Ota
Keyword(s):  
Refractive Index ◽  
Conversion Efficiency ◽  
Test Site ◽  
Reliability Evaluation ◽  
Photovoltaic Modules ◽  
Pv Array ◽  
Pv Module ◽  
Pv Modules ◽  
Main Factors

Not all sunlight irradiated on the surface of a photovoltaic (PV) module can reach the cells in the PV module. This loss reduces the conversion efficiency of the PV module. The main factors of this loss are the reflection and soiling on the surface of the PV module. With this, it is effective to have both antireflection and antisoiling effects on the surface of PV modules. In this study, the antireflection and antisoiling effects along with the long-term reliability of the silica-based layer easily coated on PV modules were assessed. A silica-based layer with a controlled thickness and refractive index was coated on the surface of a Cu(In,Ga)Se2 PV array. The array was exposed outdoors to assess its effects and reliability. As a result of the coating, the output of the PV array increased by 3.9%. The environment of the test site was relatively clean and the increase was considered to be a result of the antireflection effect. Moreover, it was observed that the effect of the coating was maintained without deterioration after 3.5 years. The coating was also applied to a silicon PV module and an effect similar to that of the CIGS PV module was observed in the silicon PV module.

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.

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