Author
Ali Abdulwahhab Abdulrazzaq
Bio: Ali Abdulwahhab Abdulrazzaq is an academic researcher from Politehnica University of Bucharest. The author has contributed to research in topics: Photovoltaic system & Electric power system. The author has an hindex of 5, co-authored 17 publications receiving 90 citations.
Papers
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TL;DR: Overall efficiency of most two popular MPPT techniques utilized in PV applications are analyzed and it is showed that the efficiency of P&O algorithm was higher than that of the INC, but to obtain the same performance for both, more concentrated calculations should be used for INC.
Abstract: A main source of current renewable energy is solar energy. This source of renewable energy can be converted to electrical energy using solar photovoltaic (PV) cells. The Maximum Power Point Tracking (MPPT) earns for maximum energy extractor from PV panels by different irradiance levels. In this paper, overall efficiency of most two popular MPPT techniques utilized in PV applications are analyzed, these algorithms are Perturb and Observe (P&O) and Incremental Conductance (INC). An analysis of the results for the algorithms based on MATLAB simulation for various changes in solar irradiance is performed. Results showed that the efficiency of P&O algorithm was higher than that of the INC, but to obtain the same performance for both, more concentrated calculations should be used for INC. In measuring the output power, current and voltage responses, the use of a solar array having constant and variable irradiations was employed as input for the algorithms. The output waveforms which were derived from a simulation run for the purpose of obtaining the algorithms response to changes in solar array irradiations were compared. In general, the consequences of the P&O algorithm are quiet good and adequate. However, there is a need to improve the algorithm so as to satisfy the requirements of face confident timing in addition to its rapid response so as to make its performance better than that of InCond algorithms.
46 citations
TL;DR: This paper characterizes a modeling and simulation of photovoltaic (PV) system that executed with Simulink/MATLAB and found that the lower the temperature gives the higher the maximum power and the larger the open circuit voltage.
Abstract: Photovoltaic (PV) systems are normally modeled by employing accurate equations dealing with a behavior the PV system. This model has Characteristics of PV array cells which are influenced by both irradiation and temperature variations. Grid-connected PV system is considered as electricity generated solar cell system which is connected to the grid utilities. This paper characterizes a modeling and simulation of photovoltaic (PV) system that executed with Simulink/MATLAB. The impact of solar irradiances as well as ambient temperature performances of PV models is investigated. It is noted that the lower the temperature gives the higher the maximum power and the larger the open circuit voltage. Furthermore, a lower temperature gave a slightly lower short circuit current.
19 citations
01 May 2019
14 citations
01 Jan 2015
TL;DR: In the present work the Newton Raphson load flow method is used for the power system contingency ranking for the line outage based on the Active power and Voltage performance index.
Abstract: analysis are important tasks in modern energy management systems. Contingency ranking using the performance index is a method for the line outages in a power system, which ranks the highest performance index line first and proceeds in a descending manner based on the calculated PI for all the line outages. This helps to take the prior action to keep the system secure. In the present work the Newton Raphson load flow method is used for the power system contingency ranking for the line outage based on the Active power and Voltage performance index.
12 citations
TL;DR: The impact of solar irradiances as well as ambient temperature performances of PV models is investigated and it is noted that a lower temperature provides maximum power higher so that the open circuit voltage is larger and if the temperature is low, then a considerably short circuit current is low too.
Abstract: Photovoltaic (PV) systems are normally modeled by employing accurate equations dealing with a behavior the PV system. This model has Characteristic of PV array cells, which are influenced by both irradiation and temperature variations. Grid-connected PV system is considered as electricity generated solar cell system which is connected to the grid utilities. This paper characterizes an exhibiting and simulating of PV system that executed with MATLAB /Simulink. The impact of solar irradiances as well as ambient temperature performances of PV models is investigated and noted that a lower temperature provides maximum power higher so that the open circuit voltage is larger. Furthermore, if the temperature is low, then a considerably short circuit current is low too.
12 citations
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01 Jan 2016
TL;DR: Thank you very much for reading advanced digital signal processing and noise reduction, maybe you have knowledge that, people have search hundreds of times for their chosen books, but end up in infectious downloads, instead they are facing with some infectious bugs inside their laptop.
Abstract: Thank you very much for reading advanced digital signal processing and noise reduction. Maybe you have knowledge that, people have search hundreds times for their chosen books like this advanced digital signal processing and noise reduction, but end up in infectious downloads. Rather than reading a good book with a cup of coffee in the afternoon, instead they are facing with some infectious bugs inside their laptop.
195 citations
TL;DR: This research demonstrates that reactive power compensation in distribution grids with distributed resources is a problem that must be analyzed from multiple criteria that consider several objective functions to be optimized; thus achieving a global solution that contemplates an optimal location and dimensioning of reactive power compensating elements.
43 citations
TL;DR: The results show that considering up to the second level contingency is satisfactory for both accuracy and computation time requirements, and constitute an essential basis for the analysis of power systems in terms of adequacy assessment and reliability evaluation.
Abstract: In this paper, a probabilistic performance index (PI) has been developed to perform contingency selection and ranking. The results show that considering up to the second level contingency is satisfactory for both accuracy and computation time requirements. The results obtained constitute an essential basis for the analysis of power systems in terms of adequacy assessment and reliability evaluation. To substantiate the study results, comparison with other similar studies was performed.
22 citations
TL;DR: The results clearly show the efficiency of the improved algorithm which contributed to the increase of the tracking speed with negligible fluctuations when the MPP is reached, and especially in rapid variation of insolation.
Abstract: The optimization of energy in a photovoltaic conversion chain remains a topic of study. The maximum power point tracking (MPPT) is considered the most appropriate solution to ensure the extraction of the maximum power which a photovoltaic generator can provide. Perturb and observe (PO it shows an important and decisive role in the development of photovoltaic (PV) systems. In This article we introduce a new improved adjustable step size P&O (imVS_PO) MPPT method.The performances of the new algorithm are compared to the conventional P&O MPPT techniques and to the existing adjustable step size P&O (VS_PO) MPPT algorithm. The results clearly show the efficiency of the improved algorithm which contributed to the increase of the tracking speed with negligible fluctuations when the MPP is reached, and especially in rapid variation of insolation.
21 citations
01 Jan 2016
TL;DR: The handbook of engineering acoustics is universally compatible with any devices to read and is available in the book collection an online access to it is set as public so you can get it instantly.
Abstract: Thank you for downloading handbook of engineering acoustics. Maybe you have knowledge that, people have search numerous times for their favorite readings like this handbook of engineering acoustics, but end up in infectious downloads. Rather than enjoying a good book with a cup of tea in the afternoon, instead they are facing with some harmful virus inside their desktop computer. handbook of engineering acoustics is available in our book collection an online access to it is set as public so you can get it instantly. Our books collection hosts in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the handbook of engineering acoustics is universally compatible with any devices to read.
21 citations