scholarly journals Hardware Approach to Mitigate the Effects of Module Mismatch in a Grid-connected Photovoltaic System: A Review

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4321 ◽  
Author(s):  
Hussain Bassi ◽  
Zainal Salam ◽  
Mohd Zulkifli Ramli ◽  
Hatem Sindi ◽  
Muhyaddin Rawa
Keyword(s):  
Photovoltaic System ◽  
Energy Yield ◽  
Pv System ◽  
Comparative Performance ◽  
System A ◽  
Dc Power ◽  
Financial Benefits ◽  
Technological Developments ◽  
Additional Circuitry

This study reviews the hardware approach to mitigate the effects of module mismatch in a grid-connected photovoltaic (PV) system. Unlike software solutions, i.e. the maximum power tracking algorithm, hardware techniques are well suited to enhance energy yield because of their inherent ability to extract energy from the mismatched module. Despite the extra cost of the additional circuitry, hardware techniques have recently gained popularity because of their long-term financial benefits. Notwithstanding the growing interest in this topic, review papers that provide updates on the technological developments of the three main hardware solutions, namely micro inverter, DC power optimizer, and energy recovery circuits, are lacking. This is in contrast to software solutions, which have had a considerable number of reputable reviews. Thus, a comprehensive review paper is appropriate at this juncture to provide up-to-date information on the latest topologies, highlight their merits/drawbacks, and evaluate their comparative performance.

scholarly journals Performance comparison of fixed and single axis tracker photovoltaic system in large scale solar power plants in Malaysia

2021 ◽  
Vol 21 (1) ◽  
pp. 10
Author(s):  
Baraa Mahmoud Dawoud ◽  
Siow Chun Lim
Keyword(s):  
Power Plants ◽  
Large Scale ◽  
Solar Power ◽  
Peninsular Malaysia ◽  
Performance Comparison ◽  
Photovoltaic System ◽  
Energy Yield ◽  
Solar Pv ◽  
Pv System ◽  
Comparative Performance

<span>Malaysia is rapidly expanding the generation capacity of solar power through large scale solar (LSS) projects with the aim to achieve 20% renewable energy mix by 2025. This has motivated many solar industry players to explore the usage of solar PV with single axis tracker (SAT) system. However, many are still hesitant due to the lack of understanding on the comparative performance between fixed mounted solar PV with solar PV with SAT system. This paper aims to provide a comparative analysis on the performance of both systems. Simulation using PVSyst 6.83 was performed in five potential LSS sites spread across Peninsular Malaysia in Perlis, Kelantan, Pahang, Selangor and Johor with the same installed capacity of 10.32MWp. The energy yield and capacity factor for 21 years were simulated. On the average, it was found that SAT outperforms fixed mounted solar PV system by 15.08% based on their performance on their first year operation. </span>

scholarly journals Grid-Connected Photovoltaic System Performance Prediction using Long-Term Weather Data

2020 ◽  
Vol 17 (1) ◽  
pp. 43
Author(s):  
Nor Zaini Zakaria ◽  
Hedzlin Zainuddin ◽  
Sulaiman Shaari ◽  
Ahmad Maliki Omar ◽  
Shahril Irwan Sulaiman
Keyword(s):  
Performance Prediction ◽  
Data Models ◽  
Photovoltaic System ◽  
Weather Data ◽  
Energy Yield ◽  
Pv System ◽  
Ground Station ◽  
Actual Field ◽  
Model Year

This aim of this paper is to evaluate the accuracy of long-term weather data models for performance prediction of grid-connected photovoltaic (GCPV) systems. The analyses were done for a 6-year old metal deck roof retrofitted GCPV system located in Shah Alam, Malaysia. The monthly and annual energy yield of the actual field data for three consecutive years were compared with the predicted yield using the long-term weather data models. These models were the Typical Meteorological Year (TMY), Model Year Climate (MYC), Microclimate data, and statistical Long-Term Mean for ground station data at Subang. The findings can be a reference for photovoltaic (PV) system designers on the range of accuracy when using the weather data models for performance predictions of GCPV system in Malaysia.

scholarly journals Researches of the Impact of the Nominal Power Ratio and Environmental Conditions on the Efficiency of the Photovoltaic System: A Case Study for Poland in Central Europe

2020 ◽  
Vol 12 (15) ◽  
pp. 6162
Author(s):  
Mariusz T. Sarniak
Keyword(s):  
Climatic Conditions ◽  
Photovoltaic System ◽  
Energy Yield ◽  
Power Ratio ◽  
Pv System ◽  
Second Stage ◽  
Pv Inverter ◽  
System A ◽  
The Impact

The paper analyzes a case study of the impact of changing the nominal power ratio (NPR) on the efficiency of a PV (photovoltaic) system located in Poland. In the first stage of the research, the acceptable range of variability for NPR was determined based on simulation calculations, taking into account the parameters of PV modules, inverter, and climatic conditions. The second stage was verification tests for two acceptable extreme cases, carried out based on the analysis of detailed data from the monitoring of PV installations. The results of the verification tests for the two considered periods of operation of the PV system with the change of the NPR coefficient from 82% to 98% resulted in an increase in the annual energy yield by 446.2 kWh. On the other hand, higher relative values of generated energy were obtained only for the months with the lowest insolation in December and in January by 8.2 and 6.04 kWh/kWp, respectively. Higher oversizing of the PV generator (for NPR = 82%) also resulted in an increase by 6.4% in the frequency of operation of the PV inverter in the largest power range (2250–2500 W) and a decrease by 3.7% in the frequency in the lowest power range (0–250 W) for the whole year.

scholarly journals Performance Factors of the Photovoltaic System: A Review

2018 ◽  
Vol 225 ◽  
pp. 03020 ◽  
Author(s):  
Noor Syahirah Mohd Hussin ◽  
Nasrul Amri Mohd Amin ◽  
Muhammad Juhairi Aziz Safar ◽  
Rina Syazwani Zulkafli ◽  
Mohd Shukry Abdul Majid ◽  
...  
Keyword(s):  
Research Work ◽  
Quality Characteristics ◽  
Ambient Condition ◽  
Photovoltaic System ◽  
Future Research ◽  
Energy Technology ◽  
Pv System ◽  
Performance Factors ◽  
System A ◽  
System Power

Photovoltaic (PV) technology is one of the clean sustainable energy technology which sourced from the sun. However, there are many issues that can potentially degrade the system. This paper extensively discusses on the hybrid system power generation for the photovoltaic (PV) system. In addition, this paper also reviews the factor that affecting the photovoltaic system performance including the types of PV cell, the effect of ambient condition, system components, and the power quality characteristics. The performance of the monocrystalline type greater than the polycrystalline type around 5-7%. The usage of an inverter gives an impact with 8-20% of total energy losses. Finally, this paper summarises the future research work needed to overcome the drawback of the available photovoltaic systems.

scholarly journals Application of artificial neural network in sizing a stand-alone photovoltaic system: a review

2020 ◽  
Vol 11 (1) ◽  
pp. 342 ◽  
Author(s):  
Ahmad Fateh Mohamad Nor ◽  
Suriana Salimin ◽  
Mohd Noor Abdullah ◽  
Muhammad Nafis Ismail
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Electrical Energy ◽  
Design Tool ◽  
Photovoltaic System ◽  
Pv System ◽  
System A ◽  
Load Demand ◽  
Artificial Neural ◽  
Artificial Neural Network Ann

<span>Artificial Neural Network (ANN) techniques are becoming useful in the current era due to the vast development of the current computer technologies. ANN has been used in various fields especially in the field of science and technology. One of the advantage that makes ANN so interesting is the ANN’s ability to learn the input and output relationship even though the relationship is non-linear. In addition, ANN is also useful for modelling, optimization, prediction, forecasting, and controlling systems. The main objective of this paper is to present a review of the ANN techniques for sizing a stand-alone photovoltaic (PV) system. The review in this paper shows the potential of ANN as a design tool for a stand-alone PV. In addition, ANN is very useful to improve the sizing process of the stand-alone PV system. The sizing process is of paramount importance to a stand-alone PV system in order to make sure the system can generate ample electrical energy to supply the load demand.</span>

Performance Analysis of 14 MW Grid-Connected Photovoltaic System

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Ahmed S Kagilik ◽  
Abduraouf M Tawel
Keyword(s):  
Performance Analysis ◽  
Power Plants ◽  
Large Scale ◽  
Photovoltaic System ◽  
Performance Ratio ◽  
First Year ◽  
Energy Yield ◽  
Plant Design ◽  
Pv System ◽  
Local Climate

Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain in Libya to add generation capacity of large-scale photovoltaic power plants. In this paper, the first grid-connected PV plant of 14 MWp which will be executed in Hoon city and supported by the Renewable Energy Authority of Libya (REAOL) is presented. To understand and improve the operational behavior of PV system, a comprehensive study including the plant design and detailed performance analysis under a local climate conditions is performed. Using polycrystalline silicon technology, the first year energy yield is estimated and the monthly system output for this plant is calculated. The performance ratio and various power losses (temperature, irradiance, power electronics, interconnection, etc.) are determined. The PV system supplied 24964 MWh to the grid during the first year giving an average annual overall yield factor 1783 kWh/kWp and average annual performance ratio of the system of 76.9%.

scholarly journals Performance Analysis of 14 MW Grid-Connected Photovoltaic System

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Ahmed S Kagilik ◽  
Abduraouf M Tawel
Keyword(s):  
Performance Analysis ◽  
Power Plants ◽  
Large Scale ◽  
Photovoltaic System ◽  
Performance Ratio ◽  
First Year ◽  
Energy Yield ◽  
Plant Design ◽  
Pv System ◽  
Local Climate

Many Libyan authorities proposed to investigate the possibility of utilizing a suitable terrain in Libya to add generation capacity of large-scale photovoltaic power plants. In this paper, the first grid-connected PV plant of 14 MWp which will be executed in Hoon city and supported by the Renewable Energy Authority of Libya (REAOL) is presented. To understand and improve the operational behavior of PV system, a comprehensive study including the plant design and detailed performance analysis under a local climate conditions is performed. Using polycrystalline silicon technology, the first year energy yield is estimated and the monthly system output for this plant is calculated. The performance ratio and various power losses (temperature, irradiance, power electronics, interconnection, etc.) are determined. The PV system supplied 24964 MWh to the grid during the first year giving an average annual overall yield factor 1783 kWh/kWp and average annual performance ratio of the system of 76.9%.

scholarly journals An optimum location of on-grid bifacial based photovoltaic system in Iraq

2022 ◽  
Vol 12 (1) ◽  
pp. 250
Author(s):  
Amina Mahmoud Shakir ◽  
Siba Monther Yousif ◽  
Anas Lateef Mahmood
Keyword(s):  
Photovoltaic System ◽  
Energy Yield ◽  
Optimum Location ◽  
Pv System ◽  
Pv Systems ◽  
Pv Module ◽  
System Module ◽  
Irradiation Level ◽  
The Cost ◽  
Suitable Location

Bifacial photovoltaic (PV) module can gain 30% more energy compared to monofacial if a suitable location were chosen. Iraq (a Middle East country) has a variable irradiation level according to its geographic coordinates, thus, the performance of PV systems differs. This paper an array (17 series, 13 parallel) was chosen to produce 100 kWp for an on-grid PV system. It investigates the PV system in three cities in Iraq (Mosul, Baghdad, and Basrah). Effect of albedo factor, high and pitch of the bifacial module on energy yield have been studied using PVsyst (software). It has been found that the effect is less for a pitch greater than 6 m. The energy gained from bifacial and monofacial PV system module in these cities shows that Mosul is the most suitable for installing both PV systems followed by Baghdad and lastly Basrah. However, in Basrah, the bifacial gain is 12% higher in the energy than monofacial as irradiation there is higher than the other locations, especially for elevation above 1.5 m. Moreover, the cost of bifacial array is 7.23% higher than monofacial, but this additional cost is acceptable since the bifacial gain is about 11.3% higher energy compared to the monofacial.

scholarly journals Real Optimisation of a PV System Based on Hysteresis Controllers over Sun: Design, Implementation, and Comparative Study

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Houda Brahmi ◽  
Rabiaa Gammoudi ◽  
Rachid Dhifaoui
Keyword(s):  
Research Unit ◽  
Photovoltaic System ◽  
Climatic Parameters ◽  
Pv System ◽  
Digital Oscilloscope ◽  
System A ◽  
Photovoltaic Power ◽  
Internal Parameters ◽  
Simulation Results ◽  
The Mathematical Model

This paper presents two strategies for controlling photovoltaic power based on hysteresis controllers. These regulators adjust the photovoltaic current and voltage in order to supply the load with maximum power. The regulators are designed, produced, and tested within the ERCO-INSAT research unit. The proposed structures are experienced, and the results prove the robustness of the controls and confirm their abilities to maintain op timal power in real time. We also presented the mathematical model of the photovoltaic system, a dynamic model taking into account the variation of the climatic parameters as well as the internal parameters of the models such as the series and shunt resistances. Simulation results are validated by an experimental test that confirms the effectiveness of the current and voltage controllers carried out. This simulation is already based on the use of real solar radiation and temperature scenarios recorded by a digital oscilloscope via the intermediary of the sensors. The two techniques are ensured by the use of the Dspace card to control the DC/DC converter and to implement the chosen controls.

scholarly journals PVcheck—A Software to Check Your Photovoltaic System

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6757
Author(s):  
Markus Rinio
Keyword(s):  
Peak Power ◽  
Weather Conditions ◽  
Data File ◽  
Photovoltaic System ◽  
Weather Data ◽  
Energy Yield ◽  
Pv System ◽  
Time Operation ◽  
Long Time ◽  
Module Efficiency

Having a photovoltaic (PV) system raises the question of whether it runs as expected. Measuring its energy yield takes a long time and the result still contains uncertainties from varying weather conditions and possible shading of the modules. Here, a free software PVcheck to measure the peak power of the system is announced, using the power data of a single sunny day. The software loads a data file of the generated power as a function of time from this day. This data file is provided by typical inverters. The software then simulates this power curve using known parameters like angle and location of the PV system. The assumed peak power of the simulation can then be adjusted so that the simulated curve matches the measured one. The software runs under Microsoft Windows™ and makes use of the free library pvlib python. The simulation can be refined by importing weather data like temperature, wind speed, and insolation. Furthermore, curves describing the nominal module efficiency as a function of the illumination intensity as well as the power-dependent inverter efficiency can be included in the simulation. First results reveal a good agreement of the simulation with experimental data. The software can be used to detect strong problems in PV systems after installation and to monitor their long-time operation.

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