Institution
Kafrelsheikh University
Education•Kafr ash Shaykh, Egypt•
About: Kafrelsheikh University is a education organization based out in Kafr ash Shaykh, Egypt. It is known for research contribution in the topics: Nile tilapia & Population. The organization has 1615 authors who have published 4232 publications receiving 59814 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the importance of grid-connected PV system regarding the intermittent nature of renewable generation, and the characterization of PV generation with regard to grid code compliance is investigated and emphasized.
Abstract: Traditional electric power systems are designed in large part to utilize large baseload power plants, with limited ability to rapidly ramp output or reduce output below a certain level. The increase in demand variability created by intermittent sources such as photovoltaic (PV) presents new challenges to increase system flexibility. This paper aims to investigate and emphasize the importance of the grid-connected PV system regarding the intermittent nature of renewable generation, and the characterization of PV generation with regard to grid code compliance. The investigation was conducted to critically review the literature on expected potential problems associated with high penetration levels and islanding prevention methods of grid tied PV. According to the survey, PV grid connection inverters have fairly good performance. They have high conversion efficiency and power factor exceeding 90% for wide operating range, while maintaining current harmonics THD less than 5%. Numerous large-scale projects are currently being commissioned, with more planned for the near future. Prices of both PV and balance of system components (BOS) are decreasing which will lead to further increase in use. The technical requirements from the utility power system side need to be satisfied to ensure the safety of the PV installer and the reliability of the utility grid. Identifying the technical requirements for grid interconnection and solving the interconnect problems such as islanding detection, harmonic distortion requirements and electromagnetic interference are therefore very important issues for widespread application of PV systems. The control circuit also provides sufficient control and protection functions like maximum power tracking, inverter current control and power factor control. Reliability, life span and maintenance needs should be certified through the long-term operation of PV system. Further reduction of cost, size and weight is required for more utilization of PV systems. Using PV inverters with a variable power factor at high penetration levels may increase the number of balanced conditions and subsequently increase the probability of islanding. It is strongly recommended that PV inverters should be operated at unity power factor.
923 citations
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TL;DR: This review discussed remediation of PTEs contaminated soils through immobilization techniques using different soil amendments with respect to type of element, soil, and amendment, immobilization efficiency, underlying mechanisms, and field applicability.
630 citations
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TL;DR: In this article, the economic feasibility of biochar application cannot be neglected and strategies for reducing biochar losses and its application costs, and increasing its use efficiency need to be developed.
534 citations
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496 citations
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TL;DR: In this paper, the interaction between NiO nanoparticles and glucose has been studied using UV-vis absorption and fluorescence spectroscopy, and the zeta-potential of NiO nano-articles was used to gain insight about the interaction mode.
458 citations
Authors
Showing all 1650 results
Name | H-index | Papers | Citations |
---|---|---|---|
Richard R. Schmidt | 66 | 833 | 23446 |
Ashraf M. Zenkour | 49 | 375 | 10069 |
Ayman Mahrous | 48 | 189 | 17178 |
Sabry M. Shaheen | 47 | 165 | 7036 |
Nuo Yang | 43 | 153 | 6052 |
Mahmoud A.O. Dawood | 42 | 241 | 5353 |
Helmut Hotzel | 40 | 158 | 4399 |
Herbert Tomaso | 40 | 175 | 4680 |
Mohamed E. El-Khouly | 40 | 126 | 5307 |
Z.M. Omara | 34 | 64 | 3126 |
Swellam W. Sharshir | 33 | 94 | 3181 |
Bin Luo | 32 | 434 | 4902 |
Yasuyuki Araki | 32 | 93 | 2786 |
Naoki Fukata | 32 | 225 | 3451 |
S.F. Mansour | 31 | 88 | 2186 |