scholarly journals Performance Evaluation of PV Panel Configurations Considering PSC’s for PV Standalone Applications

2021 ◽  
Vol 54 (6) ◽  
pp. 847-852
Author(s):  
Asadi Suresh Kumar ◽  
Vyza Usha Reddy
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Electricity Production ◽  
Solar Pv ◽  
Pv System ◽  
Partial Shading ◽  
Pv Panel ◽  
Current Maximum ◽  
Power Point

One of the major concerns for continuous solar photovoltaic (PV) generation is partial shading. The movement of clouds, shadow of buildings, trees, birds, litter and dust, etc., can lead to partial shadow conditions (PSCs). The PSCs have caused inconsistent power losses in the PV modules. This leads to a shortage of electricity production and the presence in the PV curve of several peaks. One of the simplest solutions to PSC’s is the PV configurations. The objective of this paper is modelling and simulation of solar PV system in various shading scenarios for KC200GT 200 W, 5 x 5 configurations that includes Series/Parallel (SP), Total-Cross-Tied (TCT), Triple-Tied (TT), Bridge-Link (BL) configurations. Real time PSC’s such as corner, center, frame, random, diagonal, right side end shading conditions are evaluated under all PV array configurations. A comparative analysis is carried out for the parameters such as open circuit voltage, short circuit current, maximum power point, panel mismatch losses, fill factor, efficiency under all PV configurations considering PSC’s. From the comparison analysis best configuration will be presented.

scholarly journals MPPT oscillations minimization in PV system by controlling non-linear dynamics in SEPIC DC-DC converter

2020 ◽  
Vol 10 (6) ◽  
pp. 6268
Author(s):  
M. Vaigundamoorthi ◽  
R. Ramesh ◽  
V. Vasan Prabhu ◽  
K. Arul Kumar
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Maximum Power ◽  
Solar Pv ◽  
Pv System ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Non Linear ◽  
Power Point

Solar PV power generation has achieved rapid growth in developing countries which has many merits such as absence of noise, longer life, no pollution, less time for installation, and ease of grid interface. A maximum power point tracking circuit (MPPT) consists of DC-DC power electronics converters that are used to improve the energy attainment from solar PV array. This paper presents a detailed analysis to control of chaos, a non-linear dynamic in SEPIC DC-DC converter interfaced solar PV system, to minimize the oscillations near to MPP. In SEPIC DC-DC converter, the input inductor current is continuous and capable of sweeping the whole I-V curve of a PV module from open circuit voltage (Voc) to short circuit current (Isc) operating points. To trace the true maximum power point and to nullify the oscillations near to MPP, the yield output voltage needs to ensure period-1 operation.

scholarly journals Real-Time Experimental Assessment of a New MPPT Algorithm Based on the Direct Detection of the Short-Circuit Current for a PV System

2021 ◽  
Vol 19 ◽  
pp. 598-603 ◽  
Author(s):  
C.B. Nzoundja Fapi ◽  
◽  
P. Wira ◽  
M. Kamta ◽  
Keyword(s):  
Fuzzy Logic Controller ◽  
Direct Detection ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Maximum Power ◽  
Solar Irradiation ◽  
Pv System ◽  
Maximum Power Point ◽  
Pv Panel ◽  
Power Point

To substantially increase the efficiency of photovoltaic (PV) systems, it is important that the Maximum Power Point Tracking (MPPT) system has an output close to 100%.This process is handled by MPPT algorithms such as Fractional Open-Circuit Voltage (FOCV), Perturb and Observe (P&O), Fractional Short-Circuit Current (FSCC), Incremental Conductance (INC), Fuzzy Logic Controller (FLC) and Neural Network (NN) controllers. The FSCC algorithm is simple to be implemented and uses only one current sensor. This method is based on the unique existence of the linear approximation between the Maximum Power Point (MPP) current and the short-circuit current in standard conditions. The speed of this MPPT optimization technic is fast, however this algorithm needs to short-circuit the PV panel each time in order to obtain the short circuit current. This process leads to energy losses and high oscillations. In order to improve the FSCC algorithm, we propose a method based on the direct detection of the shortcircuit current by simply reading the output current of the PV panel. This value allows directly calculating the short circuit current by incrementing or decrementing the solar irradiation. Experimental results show time response attenuation, little oscillations, power losses reduction and better MPPT accuracy of the enhanced algorithm compared to the conventional FSCC method.

scholarly journals Degradation effects of the output electrical characteristics of Si solar cells as a result of ionizing radiation under low light conditions

2015 ◽  
Vol 30 (3) ◽  
pp. 210-213 ◽  
Author(s):  
Nebojsa Stojanovic ◽  
Biljana Simic ◽  
Koviljka Stankovic ◽  
Djordje Lazarevic
Keyword(s):  
Solar Cells ◽  
Gamma Radiation ◽  
Crystalline Silicon ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Low Light ◽  
Crystalline Silicon Solar Cells ◽  
Current Maximum ◽  
Power Point

This paper presents results of radiation resistance of different types of commercially available single- and poly-crystalline silicon solar cells. Sample cells were subjected to gamma radiation from gamma radiation source 60Co. Characteristic parameters of solar cells were extracted from obtained I-V curves: open circuit voltage, short circuit current, maximum power point voltage and current, efficiency, fill factor, and series resistance. Obtained results show the level of parameters' degradation with purpose of increasing solar cells applications in radiation environments.

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 The Performance of V-Trough Solar Concentrator Photovoltaic Systems at Varying Panel Surface Temperatures

2019 ◽  
Vol 9 (2) ◽  
pp. 4231-4235
Keyword(s):  
Short Circuit ◽  
Front Surface ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Back Surface ◽  
Pv System ◽  
Pv Systems ◽  
Pv Panel ◽  
Surface Temperatures ◽  
Panel Surface

The photovoltaic (PV) panel performances are dependent upon many factors. A study was executed to ascertain the effect of a V-Trough Concentrator (VTC) to be engaged on a PV Panel in this research where the performance of PV panels are compared at different surface temperatures both back and front. The experiment was conducted using two similar rated monocrystalline PV panels. One of the PV panels was installed with a VTC while the other is without the VTC that served as Control for benchmark purposes. The optimum VTC selected is a 60° VTC. Both PV systems were built with a lower supporting mechanism and were placed to operate under similar operating and weather situations, while the PV panel surface temperature both front surface and back surface, Open Circuit Voltage (Voc), as well as Short-Circuit Current (Isc) readings are being recorded down at specific time. The theoretical output is determined and compared. This paper ends with a presentation of the results obtained in a study on the PV panel surfaces temperature in relation to its performance by PV system using a 60o VTC.

scholarly journals Effect of accumulated dust on the performance of solar PV module

2016 ◽  
Vol 6 (1) ◽  
pp. 9 ◽  
Author(s):  
Naznin Nahar Nipu ◽  
Avijit Saha ◽  
Md. Fayyaz Khan
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Natural Phenomenon ◽  
Photovoltaic Module ◽  
Solar Pv ◽  
Thermal Camera ◽  
Standard Testing ◽  
Pv Panel ◽  
Pv Module

A Solar panel is rated such that it can yield optimum output under Standard Testing Conditions (STC). But due to different environmental factors the efficiency of the panel is reduced gradually after installation. Accumulation of dust on solar PV panel is one such natural phenomenon. When dust accumulates on the PV panel, the temperature of the cells increases which subsequently decreases the open circuit voltage. The short circuit current is also reduced as deposition of dust causes shading on the panel surface. As a result, the output power of the module decreases. In this paper, the effect of dust on the performance of the photovoltaic module has been studied. The increase in temperature due to dust accumulation has been visualized through the thermal camera and the reduction in power has been analyzed through PSpice simulation and experimental data for the different amount of dust accumulated.

scholarly journals A Fault Detection Method for Photovoltaic Systems Based on Voltage and Current Observation and Evaluation

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1712 ◽  
Author(s):  
Tingting Pei ◽  
Xiaohong Hao
Keyword(s):  
Fault Detection ◽  
Detection Method ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Current Data ◽  
Partial Shading ◽  
Pv Array ◽  
Current Observation ◽  
Power Point

Photovoltaic (PV) power generation systems work chronically in various climatic outdoor conditions, therefore, faults may occur within the PV arrays in PV systems. Online fault detection for the PV arrays are important to improve the system’s reliability, safety and efficiency. In view of this, a fault-detection method based on voltage and current observation and evaluation is presented in this paper to detect common PV array faults, such as open-circuit, short-circuit, degradation and shading faults. In order to develop this detection method, fault characteristic quantities (e.g., the open-circuit voltage, short-circuit current, voltage and current at the maximum power point (MPP) of the PV array) are identified first to define the voltage and current indicators; then, the fault-detection thresholds are defined by utilizing voltage and current indicators according to the characteristic information of various faults; finally, voltage and current indicators evaluated at real-time voltage and current data are compared with the corresponding thresholds to detect potential faults and fault types. The performances of the proposed method are simulated verifying by setting eight different fault patterns in the PV array. Simulation experimental results show the effectiveness of the proposed method, especially the capacities of distinguishing the degradation faults, partial shading faults and variable shading faults.

scholarly journals Detection and control of power loss due to soiling and faults in photovoltaic solar farms via wireless sensor network

2018 ◽  
Vol 7 (2) ◽  
pp. 718 ◽  
Author(s):  
Ahmed Abid ◽  
Adel Obed ◽  
Fawzi Al-Naima
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Short Circuit ◽  
Open Circuit ◽  
Maximum Power ◽  
Wireless Sensor ◽  
Solar Pv ◽  
Maximum Power Point ◽  
Pv Panel ◽  
Power Point

Solar photovoltaic (PV) farm output power is highly related to the panel conditions. Soiling causes faults in the PV panels leading to a dras-tic reduction in the system efficiency. In vast solar PV farms, the detection of faults in an individual PV panel is a difficult task since it is usually done manually. In this research, a new design is proposed to detect the production of individual PV panel automatically and periodically to evaluate the condition of each panel in the farm no matter how it is connected in the array. The proposed design allows the user to measure the open circuit voltage (VOC), the short circuit current (ISC) and the delivered power for each PV panel in the farm. It is also capable of controlling each panel to work at the maximum power point using a built in Maximum Power Point Tracking (MPPT) sub-circuit on each solar panel. The presented system depicts a complete wireless sensor network, which does not need any extra wiring and is character-ized by being of low cost, reliable and efficient.

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