WORKSHOP SEMINARS

1. “Understand How to Write Good Papers for High Level Journals”

2. "Renewable Energy Resources for Climate Change Mitigation NRIAG Strategy (RERCCMS) "  

3. “Emerging Technologies of Sustainable Energy Systems”

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WORKSHOP SEMINAR  FEB. 21, 2023 (10:15-13:15) 

Emerging Technologies of Sustainable Energy Systems

Workshop Topics

1) Power Electronics and Grid Control

Dr. Deepak Divan, Georgia Institute of Technology, Atlanta, GA, USA.

2) Power Decoupling Technologies for Single-Phase Grid-Connected Inverters

Dr. Liuchen Chang, University of New Brunswick, Fredericton, NB, Canada

3) Design of Medium-Frequency Medium-Voltage Transformers

for Grid Applications

Dr. Juan Carlos Balda, University of Arkansas at Fayetteville, USA

4) Introduction to Microinverters and Multi-Port PV Converters

Dr. Issa Batarseh, University of Central Florida, Orlando, FL, USA

1) Power Electronics and Grid Control

Dr. Deepak Divan, Georgia Institute of Technology, Atlanta, GA, USA.

Abstract:

Over the last decade, power electronics has become intricately tied to the grid. Over 80% of new generation resources being deployed annually, including PV solar, wind and batteries, now require inverters to exchange energy with the grid. Increasing penetration of inverter-based resources (IBR) dramatically changes the dynamic behaviour of the grid, causing interactions between inverters and other grid elements. Traditional inverters, along with existing controls, are challenged to achieve the level of controllability and functionality needed for a new IBR dominant grid paradigm. This presentation will look at the role that power electronics has to play in this new grid that is emerging and will identify some of the challenges and opportunities that are becoming visible.

2) Power Decoupling Technologies for Single-Phase Grid-Connected Inverters

Dr. Liuchen Chang, University of New Brunswick, Fredericton, NB, Canada

Abstract: As the distributed energy resource market has been growing steadily, small renewable energy-based single-phase systems are proliferating in power distribution networks where single-phase inverters provide an interface between the resources and the ac grids. The mismatch of instantaneous power between the dc input from the resource and ac output to the grid requires power decoupling. This presentation focuses on the power decoupling and modulation technologies for single-phase grid-connected inverters. Conventional passive power decoupling techniques using large electrolytic capacitors at the dc-link were commonly used. In recent years, active power decoupling technologies have advanced, leading to a significant reduction in the capacitance of the dc-link capacitor to enable the use of small film capacitors and extend the lifetime of the overall converter system. The active power decoupling topologies are evolved into three control approaches: current-reference, dc voltage-reference and ac voltage-reference. This presentation provides a comprehensive overview of the decoupling topologies as well as the benefits and drawbacks of these topologies. In addition, a general comparison has also been made in terms of decoupling capacitance/inductance, additional cost, efficiency and complexity of control, providing a benchmark for future power decoupling topologies. Furthermore, pulse energy modulation (PEM) will be introduced for the control of single-phase inverters. Different from pulse-width modulation (PWM) techniques, PEM employs energy reference rather than the voltage or current reference to compare with the carrier waveform to generate triggering signals for inverter power switches.

3) Design of Medium-Frequency Medium-Voltage Transformers for Grid Applications

Dr. Juan Carlos Balda, University of Arkansas at Fayetteville, USA

Abstract: The dual-active-bridge (DAB) converter is widely used in a broad range of applications at many power and voltage levels. Better magnetic materials have enabled a methodology for designing medium-frequency transformers using customized ribbon-based nanocrystalline cores. The designer has the freedom of selecting the dimensions of the magnetic cores fitting the intended application, as opposed to typical design approaches where the availability of commercial cores determines the magnetic design.  The methodology is based on the development of a set of design equations based on only two parameters: core depth and number of turns. A parametric analysis allows selecting custom core dimensions and the turns numbers for the windings that best accomplish the transformer specifications. Two design examples are given to demonstrate the application of this methodology. The first one consists of a three-port transformer having two primary winding and one secondary winding. The second example consists of a three-phase transformer consisting of a single magnetic structure.

4) Introduction to Microinverters and Multi-Port PV Converters

Dr. Issa Batarseh, University of Central Florida, Orlando, FL, USA

Abstract: Decarbonization is the greatest engineering challenge of our time, and solar energy and energy storage systems play a major role in any future sustainable solution. Years of human ingenuity with governmental and industrial support have reduced the electricity cost from solar and wind sources to match that from natural gas. Replacing fossil fuel generation and electrifying industry sectors is the only viable option to drive for a deeply decarbonized society. In this talk, we will discuss the emerging technologies for solar photovoltaic (PV) systems. We will begin with an introduction to microinverters and a review of single-stage and two-stage inverters. Also, recent research development in single-port and multiport systems for PV application will be also presented. Finally, the presentation will also cover the implementation of dual and quad input DC-DC converter for photovoltaic (PV)  applications  where  two and four  PV panels are connected to the load through a single LLC tank, respectively. This topology uses Frequency Switching Modulation to regulate the load and Phase Shift Modulation to balance the power between both  sides  of  the  converter.  The  topologies features  a  low-cost  solution  due  to  the  number  of components  reduction  and  centralized  control  which  leads  to easier functionality and higher efficiency.

WORKSHOP SEMINAR  FEB. 20, 2023 (16:45-17:45) 

“Renewable Energy Resources for Climate Change Mitigation NRIAG Strategy (RERCCMS)” 

1- Introduction to ‘Renewable Energy Resources for Climate Change Mitigation NRIAG Strategy 

2- Geothermal Energy: A real opportunity for a sustainable future of clean energy in Egypt and Africa

Sustainable development processes are ongoing in Africa, and Egypt in particular, and this necessitates diversification in the exploitation of new energy resources that may be produced at competitive costs. In light of dwindling resources of fossil fuels, as well as rising environmental concerns, the need for clean and sustainable alternative energy is rising. Geothermal resources that haven't yet harnessed have the potential to supply additional kinds of renewable energy to fulfil local energy demands while allowing for a boost in power exports.

The majority of geothermal activity in Africa is localized in the continent's east and south, following the East African Rift System. Whereas, Africa has approximately 15 GW of geothermal potential in the Rift Valley between Mozambique and Djibouti. 830 MW of geothermal energy capacity has been installed by the beginning of 2019, with 823 MW being in Kenya. Kenya is gaining competence in this area and has identified more projects with a total capacity of around 5 GW to be deployed by 2030. Ethiopia and Tanzania are progressing with these additional initiatives to increase their generating capacity by 2500 MW by the end of 2030.

Egypt's energy is mostly produced from petroleum products, however Egypt's Supreme Energy Council has set an ambitious goal of increasing renewable energy's proportion of overall energy consumption to 20% by 2030. In Egypt, geothermal energy has an estimated installed capacity of 6.8 MW for direct heat use, with bathing and swimming, greenhouses, and space heating being the most prevalent direct heat applications. Geothermal energy has an estimated installed capacity of 6.8 MW for direct heat use in Egypt, with bathing and swimming, greenhouses, and space heating being the most prevalent direct heat applications. Our exhaustive exploration reveal that Egypt offers great geothermal potential in the Red Sea, Gulf of Suez, and Gulf of Aqaba coasts that could be used to produce power. On the other hand, the hot springs and thermal wells in the Western desert can be accessed directly.

3- Solar Energy Technologies Challenges and Green Hydrogen for Climate Change Mitigation 

Solar energy is one of the most renewable energy applications. Hydrogen will also make an important contribution to large-scale resilience in the sustainable energy system of the future. There is also more to be done to stimulate the production and use of green hydrogen, using electricity from solar and wind power for the electrolysis of water. NRIAG has a strong track record in research on solar energy and environmental sciences and engineering with a large portfolio of grants from Egypt’s public funder of research such as Science, Technology & Innovation Funding Authority (STDF), Academy of Scientific Research & Technology (ASRT) and industry in the area. To build on this success, NRIAG has established the interdisciplinary activities to develop multidisciplinary approaches to address both short term and longer-term challenges of solar energy generation, green hydrogen, energy demand reduction, energy security and sustainability. Disseminating the ongoing and past research outputs to local stakeholders is key to identify best strategies and solutions to adapt against the impacts of climate change.

4- Delineation the natural radioactivity values, the radiogenic heat production, and the land surface temperature: Examples from the Central Eastern Desert, Egypt

 The Central Eastern Desert (CED) region is one of the most promising areas for urban growth and reclamation projects of Egypt. The study area is covered with a variety of basement and sedimentary rocks ranging in age from Precambrian (mainly granite) to Quaternary (mainly sand sediments). The analysis of airborne magnetic and gamma-ray spectrometry data was combined into that of the remote sensing data (Landsat-9). The integrated analysis was used to identify the lithological distributions and to define the subsurface basement rocks that control the radioactivity in the study area. It was also used to determine the relationship between radiogenic heat production (RHP) and land surface temperature (LST) that was retrieved from the Landsat-9 thermal infrared sensor (TIRS) data. The LST map, calculated from Landsat-9 collection 2 level2, shows that the surface temperatures range from approximately 46.85 to 66.85 ◦C. The highest concentrations of eU, eTh, and K in the area were 67.7 ppm, 155.8 ppm, and 30.9%, respectively. The RHP values ranged from 1.6 μW/m3 to 31.7 μW/m3. The energy from heat emitted ranged from 508 to 932 Joules These relatively high anomalies are associated with basement outcrops and the sedimentary rocks overlying shallow basement rocks. The total horizontal derivative (THD) of the magnetic data describes the horizontal extension of the basement rocks due to the Red Sea rifting process. The Curie point depth (CPD), estimated from magnetic data, ranges from 5 km to 9 km. The results also exhibited geothermal gradients ranging from 90◦ C/km to 176◦ C/km, and heat flow ranges from 260 mW/m2 to 512 mW/m2. It was evident after comparing that the RHP and LST maps revealed the same features as the gamma-ray spectrometric maps.

WORKSHOP SEMINAR   FEB. 20, 2023 (11:30-13:00)  

“Understand How to Write Good Papers for High Level Journals”

Prof. Frede Blaabjerg Aalborg Universitet, Denmark 

This workshop seminar tries to help to increase the chances to get papers published in international journals. To serve the goal, in this seminar:

✓ First, the procedure about how the paper review process is carried out will be explained.

✓ How will the paper be reviewed.

✓ Important aspects to consider when you write your paper. (Paper structure,what to do and what not to do).

✓ How to include citations to other work in a paper.