scholarly journals An Online Novel Two-Layered Photovoltaic Fault Monitoring Technique Based Upon the Thermal Signatures

2020 ◽  
Vol 12 (22) ◽  
pp. 9607
Author(s):  
Qamar Navid ◽  
Ahmed Hassan ◽  
Abbas Ahmad Fardoun ◽  
Rashad Ramzan
Keyword(s):  
Power Generation ◽  
Thermal Imaging ◽  
Power Plants ◽  
Short Circuit ◽  
Open Circuit ◽  
Photovoltaic System ◽  
Primary Concern ◽  
Electrical Parameters ◽  
Partial Shading ◽  
Fault Diagnostic

The share of photovoltaic (PV) power generation in the energy mix is increasing at a rapid pace with dramatically increasing capacity addition through utility-scale PV power plants globally. As PV plants are forecasted to be a major energy generator in the future, their reliable operation remains of primary concern due to a possibility of faults in a tremendously huge number of PV panels involved in power generation in larger plants. The precise detection of nature and the location of the faults along with a prompt remedial mechanism is deemed crucial for smoother power plant operation. The existing fault diagnostic methodologies based on thermal imaging of the panels as well as electrical parameters through inverter possess certain limitations. The current article deals with a novel fault diagnostic technique based on PV panel electrical parameters and junction temperatures that can precisely locate and categorize the faults. The proposed scheme has been tested on a 1.6 kW photovoltaic system for short circuit, open circuit, grounding, and partial shading faults. The proposed method showed improved accuracy compared to thermal imaging on panel scale fault detection, offering a possibility to adapt to the PV plant scale.

scholarly journals Experimental Investigation of the Effects of Partial Shading on Photovoltaic Cells’ Electrical Parameters

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
W. B. Xiao ◽  
F. Y. Hu ◽  
H. M. Zhang ◽  
H. M. Wu
Keyword(s):  
Open Circuit Voltage ◽  
Short Circuit ◽  
Isosceles Triangle ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Electrical Parameters ◽  
Maximum Power Point ◽  
Partial Shading ◽  
Black Card ◽  
Power Point

The short-circuit current (Isc), the open-circuit voltage (Voc), and the maximum power point (VMPP,IMPP) of monocrystalline and multicrystalline silicon solar cells under three kinds of partial shading patterns have been investigated experimentally. The partial shades are, respectively, the nine shelter locations by 1 cm × 1 cm black card, the six shelter locations by 2 cm × 1 cm black card, and the center shelters with isosceles triangle, circle, square, and two rectangles black cards whose areas are 2 cm2. Firstly, the results show that the partial shading causes disproportional high losses on those parameters of both cells but will have a minimal effect onVoc. Secondly, it is found that those parameters of the monocrystalline cell are less dependent on the shading than that of the multicrystalline cell. Thirdly, it is noted thatIscandIMPPof both cells will be decreasing dramatically as a rectangular black shading card with a long side parallel to cell’s finger, compared with that normal to cell’s finger. Finally, it can be seen that the effects of shading on the electrical parameters of both cells will be suppressed when the border lines of shading match the size of the shaded cell.

scholarly journals Short and open circuit faults study in the PV system inverter

2021 ◽  
Vol 12 (3) ◽  
pp. 1764
Author(s):  
Mohammed Bouzidi ◽  
Abdelkader Harrouz ◽  
Tadj Mohammed ◽  
Smail Mansouri
Keyword(s):  
Short Circuit ◽  
Electric Utility ◽  
Open Circuit ◽  
Photovoltaic System ◽  
Pv System ◽  
Simple Method ◽  
Pv Systems ◽  
Pv Array ◽  
Main Component ◽  
Types Of Faults

<p>The inverter is the principal part of the photovoltaic (PV) systems that assures the direct current/alternating current (DC/AC) conversion (PV array is connected directly to an inverter that converts the DC energy produced by the PV array into AC energy that is directly connected to the electric utility). In this paper, we present a simple method for detecting faults that occurred during the operation of the inverter. These types of faults or faults affect the efficiency and cost-effectiveness of the photovoltaic system, especially the inverter, which is the main component responsible for the conversion. Hence, we have shown first the faults obtained in the case of the short circuit. Second, the open circuit failure is studied. The results demonstrate the efficacy of the proposed method. Good monitoring and detection of faults in the inverter can increase the system's reliability and decrease the undesirable faults that appeared in the PV system. The system behavior is tested under variable parameters and conditions using MATLAB/Simulink.</p>

The influence of emitter resistance on the electrical parameters of mono- and multicrystalline silicon solar cells

2019 ◽  
Vol 36 (3) ◽  
pp. 90-94
Author(s):  
Barbara Swatowska ◽  
Piotr Panek ◽  
Dagmara Michoń ◽  
Aleksandra Drygała
Keyword(s):  
Solar Cells ◽  
Contact Resistance ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Multicrystalline Silicon ◽  
Silicon Solar Cells ◽  
Electrical Parameters ◽  
Content Type ◽  
Diffusion Parameters

Purpose The purpose of this study was the comparison and analysis of the electrical parameters of two kinds of silicon solar cells (mono- and multicrystalline) of different emitter resistance. Design/methodology/approach By controlling of diffusion parameters, silicon mono- (Cz-Si) and multicrystalline (mc-Si) solar cells with different emitter resistance values were produced – 22 and 48 Ω/□. On the basis of current-voltage measurements of cells and contact resistance mapping, the properties of final solar cells based on two different materials were compared. Additionally, the influence of temperature on PV cells efficiency and open circuit voltage (Uoc) were investigated. The PC1D simulation was useful to determine spectral dependence of external quantum efficiency of solar cells with different emitter resistance. The silicon solar cells of 25 cm2 area and 240 µm thickness were investigated. Findings Considering the all stages of cell technology, the best structure is silicon solar cell with sheet resistance (Rsheet) of 45-48 Ω/□. Producing of an emitter with this resistance allowed to obtain cells with a fill factor between 0.725 and 0.758, Uoc between 585 and 612 mV, short circuit current (Isc) between 724 and 820 mA. Originality/value Measurements and analysis confirmed that mono- and multicrystalline silicon solar cells with 48 Ω/□ emitter resistance have better parameters than cells with Rsheet of 22 Ω/□. The contact resistance is the highest for mc-Si with Rsheet of 48 Ω/□ and reaches the value 3.8 Ωcm.

Terminal alkyl substitution in an A–D–A-type nonfullerene acceptor: simultaneous improvements in the open-circuit voltage and short-circuit current for efficient indoor power generation

2020 ◽  
Vol 8 (45) ◽  
pp. 23894-23905
Author(s):  
Hwa Sook Ryu ◽  
Hyun Gyeong Lee ◽  
Sang-Chul Shin ◽  
Jooho Park ◽  
Sang Hyeon Kim ◽  
...  
Keyword(s):  
Power Generation ◽  
Light Absorption ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Charge Mobility ◽  
Alkyl Substitution ◽  
Nonfullerene Acceptor

Terminal alkyl substituents in IDIC nonfullerene acceptors improve light absorption, crystalline packing and charge mobility in films.

scholarly journals A Hybrid MPPT Technique for Solar Photovoltaic System under Partial Shading

2021 ◽  
Vol 12 (1) ◽  
pp. 28
Author(s):  
Hafiz Muhammad Tayyab ◽  
Yaqoob Javed ◽  
Irfan Ullah ◽  
Abid Ali Dogar ◽  
Burhan Ahmed
Keyword(s):  
High Efficiency ◽  
Open Circuit ◽  
Photovoltaic System ◽  
Solar Photovoltaic ◽  
Pv System ◽  
Maximum Power Point ◽  
Partial Shading ◽  
High Convergence Rate ◽  
Power Point ◽  
Solar Photovoltaic System

A major problem in the photovoltaic (PV) system is to determine the maximum power point (MPP) and to overcome the limitations of environmental change. To resolve the limitation of different techniques with high convergence rate and less fluctuations, a hybrid model of fractional open circuit voltage is proposed. For partial shading, incremental conductance is used. The proposed technique is extremely useful, provides high efficiency, and takes less time to achieve the MPP. The tenacity of the proposed method has been checked using MATLAB/Simulink, which clearly shows that the proposed technique has high efficiency compared to other MPP tracking methods.

An Investigation on Dye-Sensitized Solar Cell Performance Influenced by Radiant Intensity and Illuminated Area in Concentrating Photovoltaic System

2014 ◽  
Vol 1070-1072 ◽  
pp. 616-619
Author(s):  
Wen Bo Xiao ◽  
Jin Dai ◽  
Guo Hua Tu ◽  
Hua Ming Wu
Keyword(s):  
Solar Cell ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Photovoltaic System ◽  
Dye Sensitized Solar Cell ◽  
Solar Cell Performance ◽  
Radiant Intensity ◽  
Dye Sensitized

The dye-sensitized solar cell performances influenced by radiant intensity and illuminated area in concentrating photovoltaic system are investigated experimentally and discussed theoretically. The results show that, under the same irradiated cells area, the short-circuit current is linearly increasing with the radiant intensity and the open-circuit voltage follows a logarithmic function of the radiant intensity. And, it is turned out that the short-circuit current and open-circuit voltage are obviously enhanced by increasing the illuminated cells surface area at the same radiant intensity. However, that growth trends will decline with an increase of the illuminated area. The reason is more defects involved in the process of increasing illumination area. All results can be interpreted using an equivalent circuit of a single diode model. A good agreement can be observed from the fitting curves. It is of great significance for current photovoltaic research.

scholarly journals The Transition to Renewable Energy for A Green Shoot of Economic Revival: Comparative Study of Four MPPT Control Algorithms for A PV System

2021 ◽  
Vol 2 (3) ◽  
Author(s):  
Hedi Trabelsi ◽  
Younes Boujelbene
Keyword(s):  
Renewable Energy ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Photovoltaic System ◽  
Control Algorithms ◽  
Pv System ◽  
Perturb And Observe ◽  
Simulation Results

This paper explains the need for renewable energies for “green revival” of the economy. First, we will analyze the overall context of the double crisis. Then we will focus on “green recovery” as a solution for these two crises. Finally, we will study the example of the photovoltaic system as a source of renewable energy by presenting and comparing four types of MPPT commands such as: Perturb and Observe, Incremental Conductance, Fractional Open-Circuit Voltage (FOV) and Fractional Short-Circuit Current (FCC). The Matlab-Simulink environment will be used to analyze and interpret the simulation results of these algorithms and therefore we show the performance and limits of each algorithm.

scholarly journals Mathematical modelling for solar cell, panel and array for photovoltaic system

2021 ◽  
Vol 13 (3) ◽  
pp. 937-943
Author(s):  
Hina N. Kadeval ◽  
V. K. Patel
Keyword(s):  
Power Generation ◽  
Solar Cell ◽  
Reference Model ◽  
Short Circuit ◽  
Radiation Condition ◽  
Photovoltaic System ◽  
Solar Irradiation ◽  
Basic Unit ◽  
Pv System ◽  
Shunt Resistance

Renewable energy is considered as next alternative to fossil fuels and nowadays, it attracts much attention in agriculture and environmental protection. Application of solar photovoltaic system is drying and dehydration of products, heating, irrigation, greenhouse and power generation etc. Temperature and sun radiation varies nonlinearly. Power generation varies with reference to radiation and temperature in photo-voltaic (PV) system. PV characteristic is nonlinear and  PV cell is the basic unit for electricity generation. To get the characteristic response of PV, it aimed to develop a solar cell/panel model and array on a platform like MATLAB. In this research paper, step by step procedure has been defined for modelling solar cell, panel, and array models of the photovoltaic system. Kyocera solar KC-200GT 200W solar panel is used as a reference model for further modelling. The PV array characteristic are simulated for different irradiance(200W/m2,400 W/m2 ,600 W/m2 ,800W/m2 ,1000W/m2)and temperature variation(25°C, 35°C, 45°C, 55°C, 75°C). The output characteristic of the reference model matches with simulated results. The output reduced when the solar irradiation reduced from 1000 to 200 W/m2. As the temperature increased, the output voltage decreases, whereas the output current increases slightly. This model would be useful for investigating the effect of different parameters like series resistance, shunt resistance, thermal voltage, solar cell temperature coefficient of short circuit current etc. It would also be useful for investigating the working parameters like temperature & radiation condition and different series and parallel combinations of panels. This modelling is useful in investigating the performance of solar arrays in different applications of solar power generation, as well as modelling provides a major role in the mounting of PV panels. 

Numerical Investigation of the Cooling Temperature of the InGaP/InGaAs/Ge Subcells Under the Concentrated Illumination

2020 ◽  
Vol 75 (2) ◽  
pp. 93-101
Author(s):  
Kenza Djermane ◽  
Syham Kadri ◽  
Abdelhafid Habbab ◽  
Elhouaria Bourbaba
Keyword(s):  
Cooling System ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Incident Radiation ◽  
Open Circuit ◽  
Photovoltaic System ◽  
Large Temperature ◽  
High Concentration ◽  
Cooling Temperature ◽  
Wide Range

AbstractThe multijunction solar cells performances study is essential for the design of the high-concentration photovoltaic. These cells can operate over a wide range of the incident radiation flux and a large temperature range. These two parameters (concentration and temperature) degrade the cell and require a cooling system. In this article, we have studied numerically the cooling temperature of InGaP/lnGaAs/Ge subcells under the concentrated illumination. For this, we have presented the performance of each subcell as a function of the temperature and concentration sunlight. The different high concentrations ratios (1, 10, 100, and 1000 sun) have been conducted according to the dish-style concentration photovoltaic system for three temperature values T = 300, 500, and 800 K. The results show that under high concentrated light intensity conversion, the performances of these three subcells (efficiency, open-circuit voltage, short-circuit current, and fill factor) were decreased with increasing the temperature. The main objective of this study is to find the limit temperature of each subcell in order to introduce the cooling system. Thus, we can avoid the degradation of the tandem solar cell under the concentrated illumination.

Effect of glucagon on ion transport in mouse intestine

1980 ◽  
Vol 238 (6) ◽  
pp. G491-G494
Author(s):  
M. E. Kaufman ◽  
M. A. Dinno ◽  
K. C. Huang
Keyword(s):  
Surface Charge ◽  
Short Circuit ◽  
Ussing Chamber ◽  
Membrane Surface ◽  
Open Circuit ◽  
Secretory Diarrhea ◽  
Electrical Parameters ◽  
Bathing Medium ◽  
Mouse Intestine ◽  
Membrane Surface Charge

Effects of glucagon (GN) on short-circuited mouse intestine were studied. GN (30 microgram . ml-1), added to the serosa of intestine mounted in an Ussing chamber and bathed in glucose-free Ringer, induced significant increases of 43% in serosal-to-mucosal Cl- flux (Js leads to m Cl), 315% in net Cl- secretion (Jnet Cl), 85% in net residual flux (J net R), 61% in short-circuit current (Isc), and 44% in open-circuit potential difference (PD). The mucosal-to-serosal Cl- flux and both unidirectional Na+ fluxes (Jm leads to s Na and Js leads to m Na) were unchanged. In a glucose Ringer bathing medium, GN exhibited no significant effects on ion fluxes and electrical parameters. To eliminate the possibility that observed GN-induced changes in PD and Isc were partially due to changes in membrane surface charge, the effects of GN in Cl- -free Ringer were studied. Under these conditions, GN had no effect on electrical parameters. Furthermore, GN elicited no effect on cAMP levels in either the presence or absence of glucose. These findings suggest that 1) the effect of GN on Jnet Cl is masked in the presence of glucose, 2) GN-induced increases in Isc and PD are a reflection of the increase in Jnet Cl and are neither due to changes in membrane surface charge nor to an increase in net Na+ flux, and 3) GN-induced secretory diarrhea is in part due to changes in electrolyte transport.

Sign in / Sign up

Export Citation Format

Share Document