scholarly journals A Comprehensive Analysis of Partial Shading Effect on Output Parameters of a Grid-connected PV System

2018 ◽  
Vol 8 (2) ◽  
pp. 749
Author(s):  
H. Rahimi Mirazizi ◽  
M. A. Shafiyi
Keyword(s):  
Harmonic Distortion ◽  
Comprehensive Analysis ◽  
Test Results ◽  
Pv System ◽  
Partial Shading ◽  
Pv Panel ◽  
System Output ◽  
Multi Level ◽  
And Performance ◽  
Set Up

One of the issues of grid-connected photovoltaic systems is the effect of the partial shading on the key parameters and performance of the system. In practice, a share of the entire PV panel may shadded because of the various reasons, inevitably. In this case, the key parameters of the system output are affected with respect to the shading extent and paradigm. In this paper, the effects of the various partial shading patterns on the ouput of the system are examined. This is performed by deriving relevant equations and appropriate modeling of the system and defining different scenarios. The analysis on the system performance is carried out on the dominant output parameters including panel voltage, panel power, and total harmonic distortion (THD) of the inverter. Also, the study considers the effect of using bypass diodes in the panels or not. Addintionally, to compare derived conclusions, the study is implementd on a practical system. The set up is made up of a 7-level multi-level inverter, a Z-source converter, and 1 kW lateral circuitry. The real world test results of the study demonstrate a negligible deviation compared to the simulation results.

scholarly journals Different Techniques to Mitigate Partial Shading in Photovoltaic Panels

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3863
Author(s):  
Tiago Alves ◽  
João Paulo N. Torres ◽  
Ricardo A. Marques Lameirinhas ◽  
Carlos A. F. Fernandes
Keyword(s):  
Cell Model ◽  
Research Work ◽  
Experimental Tests ◽  
Operating Conditions ◽  
Pv System ◽  
Partial Shading ◽  
System Architectures ◽  
Pv Systems ◽  
Advantages And Disadvantages ◽  
Pv Panel

The effect of partial shading in photovoltaic (PV) panels is one of the biggest problems regarding power losses in PV systems. When the irradiance pattern throughout a PV panel is inequal, some cells with the possibility of higher power production will produce less and start to deteriorate. The objective of this research work is to present, test and discuss different techniques to help mitigate partial shading in PV panels, observing and commenting the advantages and disadvantages for different PV technologies under different operating conditions. The motivation is to contribute with research, simulation, and experimental work. Several state-of-the-artsolutions to the problem will be presented: different topologies in the interconnection of the panels; different PV system architectures, and also introducing new solution hypotheses, such as different cell interconnections topologies. Alongside, benefits and limitations will be discussed. To obtain actual results, the simulation work was conducted by creating MATLAB/Simulink models for each different technique tested, all centered around the 1M5P PV cell model. The several techniques tested will also take into account different patterns and sizes of partial shading, different PV panel technologies, different values of source irradiation, and different PV array sizes. The results will be discussed and validated by experimental tests.

465Q Gasoline Engine Turbocharger Matching and Performance Calculation

2012 ◽  
Vol 500 ◽  
pp. 223-229 ◽  
Author(s):  
Peng Qi Zhang ◽  
Dong Hui Zhao ◽  
Peng Wu ◽  
Yin Yan Wang
Keyword(s):  
Simulation Model ◽  
Fuel Consumption ◽  
Test Bench ◽  
Gasoline Engine ◽  
Test Results ◽  
Simulation Error ◽  
And Performance ◽  
Set Up ◽  
Performance Calculation ◽  
Supercharged Engine

This article take the Dongan 465Q non-supercharged engine as the research object, the simulation model is built by GT-POWER and the corresponding test bench is set up. The simulation error is less than 3%, which indicates that the parameters of this model is correct, and can be used for further study of the gasoline engine. The supercharger, Garrett GT12, is selected by the matching calculation. The non-supercharged 465Q engine is modified as a turbocharged engine. The test results show that the power and the fuel consumption of the turbocharged engine is improved obviously, whose power is increased by 48% and fuel consumption is reduced by 4%.

scholarly journals Development of Photovoltaic Inverter for AC Load

2017 ◽  
Vol 3 (4) ◽  
pp. 28
Author(s):  
Nur Fairuz Mohamed Yusof ◽  
Mazwin Mazlan
Keyword(s):  
Light Emitting Diode ◽  
Harmonic Distortion ◽  
Photovoltaic System ◽  
Oxide Semiconductor ◽  
Solar Pv ◽  
Pv System ◽  
Software Simulation ◽  
Pv Panel ◽  
Ideal System ◽  
Power Switches

This project presents the development of Photovoltaic (PV) push-pull inverter for alternating current (AC) application. There are two main systems in this project which is the PV system and the inverter system. The photovoltaic system consists of the PV panel which is used to seep sunshine to recharge the battery and the solar charger controller circuit that prevent battery from surpluses voltage is connected between solar PV and battery. While the push-pull inverter play a pivotal role in switching from direct current (DC) voltage to AC voltage for the inverter system. Then the AC voltage rose to 230 V by using transformer. The push-pull inverter switching is controlled by a multi-vibrator driver circuit. This project used two light emitting diode (LED) light bulb as an AC load and Metal Oxide Semiconductor Field Effect Transistor (MOSFETs) as the power switches. This project had been analysed through software and hardware prototype for comparison purposed. The efficiency of ideal system that obtains from software simulation is 94.9% while for the hardware prototype is nearly to 95%. While the total harmonic distortion (THD) for both voltage and current is 48.32% from software simulation and 47.9% from hardware prototype analysis. The results have been found in good agreement with the analysis presented in this paper.

Hardware Implementation of Z-Source Inverter Based MPPT Scheme for Solar Power Conversion System

2014 ◽  
Vol 984-985 ◽  
pp. 819-827
Author(s):  
R. Sridhar ◽  
A. Velu ◽  
V. Kiran Kumar ◽  
R. Parthipan
Keyword(s):  
Power Conversion ◽  
Maximum Power ◽  
Pv System ◽  
Power Efficient ◽  
Point Tracking ◽  
Pv Panel ◽  
Maximum Power Tracking ◽  
Power Yield ◽  
Power Point ◽  
Set Up

In this paper, the implementation of Z-Source Inverter based on Maximum power point tracking scheme (MPPT) for photovoltaic (PV) System is employed. This proposed work has the advantage of more power yield with reduced switching elements in power conditioner. Also a single stage power conversion circuit possessing Z-source network which replaces the boost converter set up in conventional mundane maximum power tracking circuits. The maximum power tracking is the trickiest part which is embedded within the inverter control. Therefore the control over inverter not only operates the PV panel at its maximum possible power but also have a check at the capacitor voltage of the Z-source network, thereby making the system more reliable and power efficient.

scholarly journals Design and implementation of an indoor solar emulator based low-cost autonomous data logger for PV system monitoring

2019 ◽  
Vol 10 (3) ◽  
pp. 1645
Author(s):  
Oday A. Ahmed ◽  
Hussain K Sayed ◽  
Kanaan A Jalal ◽  
Dhari Y. Mahmood ◽  
Waleed H. Habeeb
Keyword(s):  
Data Acquisition ◽  
Low Cost ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Renewable Energy Resources ◽  
Data Logger ◽  
Pv System ◽  
Partial Shading ◽  
Pv Systems ◽  
Pv Panel

With the growing interest in renewable energy resources, a various number of studies and development for photovoltaic (PV) systems have investigated to satisfy global needs in energy. The larger interest in PV resources has increased request for suitable apparatus with which to test PV systems. This paper deals with the design of an indoor PV source emulator using an actual PV panel to facilitate PV system testing under real environment conditions. A low-cost Arduino Mega256 microcontroller-based data acquisition system (DAQ) approach has been developed to collect the data in term of voltage, power and current based on different levels of light intensity and temperature as well as under partial shading conditions. Hence, the proposed system is not just a solar emulator but it’s a complete solar emulator-DAQ system that can emulate the sunlight and monitor the PV parameters and then collect and store the data for further research investigation. The proposed monitoring system provides real time update of the solar panel characteristics at any time in the year without relying on the weather changes. This data acquisition system will be of superior interest for undergraduate and graduate students as it is both open-source and flexible. The details design of the proposed PV solar emulator and data logger and its implementation are described.

An Improved Photovoltaic Array Configuration for Photovoltaic System in the Presence of Maximum Power Point Tracking during Partial Shading Condition

2017 ◽  
Vol 6 (2) ◽  
pp. 301 ◽  
Author(s):  
K. Burhanudin ◽  
N.A. Kamarzaman ◽  
A.A.A. Samat ◽  
A.I. Tajudin ◽  
S.S. Ramli ◽  
...  
Keyword(s):  
Photovoltaic System ◽  
Pv System ◽  
Partial Shading ◽  
Array Configuration ◽  
Photovoltaic Array ◽  
Pv Array ◽  
Point Tracking ◽  
Simulation Speed ◽  
Pv Panel ◽  
Pv Module

Power-Voltage (P-V) curve and Current-Voltage (I-V) curve determine the performance of the PV system. In this work, the arrangements of the PV module were reconstructed by adding the number of PV module in 3 strings configuration from 5 to 45. This method enhance the performance of the PV system as it able to show the characteristic of the P-V and I-V curve during partial shading and maximum irradiance despite higher number of PV panel. This study focuses on improving the PV array configuration and simulation speed of the PV panel. The simulation of small size PV array is possible, but the problem lies when the number of string and PV module used increases. New PV array configuration is flexible and easy to add string and increase the number of PV module. PV array configuration was modeled using MATLAB/SIMULINK software.

scholarly journals Environmental Impacts on the Performance of Solar Photovoltaic Systems

2020 ◽  
Vol 12 (2) ◽  
pp. 608 ◽  
Author(s):  
Ramadan J. Mustafa ◽  
Mohamed R. Gomaa ◽  
Mujahed Al-Dhaifallah ◽  
Hegazy Rezk
Keyword(s):  
Environmental Factors ◽  
Power Output ◽  
System Performance ◽  
Reliability And Validity ◽  
Water Droplets ◽  
Pv System ◽  
Partial Shading ◽  
Pv Panel ◽  
Pv Module ◽  
The Impact

This study scrutinizes the reliability and validity of existing analyses that focus on the impact of various environmental factors on a photovoltaic (PV) system’s performance. For the first time, four environmental factors (the accumulation of dust, water droplets, birds’ droppings, and partial shading conditions) affecting system performance are investigated, simultaneously, in one study. The results obtained from this investigation demonstrate that the accumulation of dust, shading, and bird fouling has a significant effect on PV current and voltage, and consequently, the harvested PV energy. ‘Shading’ had the strongest influence on the efficiency of the PV modules. It was found that increasing the area of shading on a PV module surface by a quarter, half, and three quarters resulted in a power reduction of 33.7%, 45.1%, and 92.6%, respectively. However, results pertaining to the impact of water droplets on the PV panel had an inverse effect, decreasing the temperature of the PV panel, which led to an increase in the potential difference and improved the power output by at least 5.6%. Moreover, dust accumulation reduced the power output by 8.80% and the efficiency by 11.86%, while birds fouling the PV module surface was found to reduce the PV system performance by about 7.4%.

scholarly journals A modified PV fed 9 level inverter for standalone applications with reduced number of switches

2017 ◽  
Vol 7 (1.2) ◽  
pp. 33
Author(s):  
Jaikrishna V ◽  
Subhranhsu Sekhar Dash ◽  
Linss T Alex
Keyword(s):  
Harmonic Distortion ◽  
Cost Effective ◽  
Digital Controller ◽  
Power Electronic ◽  
Pv System ◽  
Suggested Technique ◽  
Multi Level ◽  
Hardware Circuit ◽  
Inverter Topology ◽  
Electronic Switches

The power crisis in India is increasing at an alarming rate. Solar power is a domestic source of energy and its availability throughout the year makes it a primary target to solve this crisis. It will never produce any hazardous waste and it won’t pollute the air. But various issues like Power quality problems and Harmonic distortion seep in due to the intermittent nature of PV system. Multi-Level Inverter (MLI) gives solution for PQ issues and helps in high power handling capabilities. In this work a new multilevel inverter topology is proposed. The controlled pulses are generated through sinusoidal PWM techniques. The proposed topology is implemented and the controlled circuit is simulated in MATLAB/SIMULINK. The same is realized in the hardware circuit having a cost effective dsPIC30F2010 digital controller. The proposed topology consists of only seven power electronic switches and that is the main advantage of this topology. The Simulation results and the Hardware results reveal that the suggested technique is highly advantageous.

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.

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