Yannick Cyiza Karekezi
About
Yannick Cyiza Karekezi is employed as a PhD student in electrical power engineering, where he is researching the flexible operation of hydropower generators as balancing power for renewable energy sources. He is also a member of IEEE.
- He works in Work Package 1 (WP1) in the hydropower system project SysOpt.
- researches in the field of Nuclear Energy’s role in a Renewable Energy System (NERES)
-
Research in hydropower published in Hydrocen.
He holds a PhD in electrical power engineering from the Norwegian University of Science and Technology and was awarded his Doctorate 21.08.2024.
He is a reviewer for the American journals:
Since 2021, he has also been a board member for IEEE Power and Energy Society Chapter of Norway.
Research interests
-
Machine design and analysis of salient-pole synchronous machines (hydropower generators)
- flexible operation of hydropower production as balancing power for variable renewable energy sources.
- Machine design and analysis of permanent magnet synchronous machines (electric motors and generators).
- Modern nuclear power and small modular reactors (Generation 3+ and Generation 4).
-
Machine design of modular inner rotor and outer rotor HVDC permanent magnet synchronous machines (offshore wind generator).
Co-supervised master's student
Background
- 2019 - 2021, Master's student at NTNU (Master Thesis)
Research policy
[1] Havvind: Vi kan ikke bruke tid på å diskutere hvor vondt og vanskelig dette er, Teknisk Ukeblad, 1. November 2022.
[2] Nei, havvind alene kan ikke erstatte all norsk gasseksport, Teknisk Ukeblad, 9. Oktober 2022.
[3] Det norske vindkrafteventyret trenger kjernekraft, NRK Ytring, 24. Juli 2022.
[4] Vindkraft degraderer vannkraftgeneratorer, Energiteknikk, 20. September 2021.
Research
- Strengthening the operational security of the national power system and power transmission capacity while reducing investment costs and transmission losses.
- Optimizing the interaction between the power producer and the grid owner(s), i.e., Transmission System Operator (TSO) and Distribution System Operator (DSO) through improved coordinated measures.
Publications
Loss Modeling of Large Hydrogenerators for Cost Estimation of Reactive Power Services and Identification of Optimal Operation
Economic Benefits of Hydrogenerator Rotor Pole Redesign and Field Winding Refurbishment to Accommodate Future Operational Regimes
Transforming Classical Hydropower Generation for Flexibility in the Global Energy Transition: Challenges, Requirements, and Prospects
The Energy Transition’s Impact on the Accumulated Average Efficiency of Large Hydrogenerators
Segmentation Effects in the Modular HVDC Offshore Wind Generator and its Impact on Losses
Segmentation Effects in the Modular HVDC Offshore Wind Generator and its impact on Thermal Performance
During my PhD, I have written four research articles focusing on the design and flexible operation of hydropower generators. Through these articles, I have explored various aspects of optimizing generator performance, with a particular emphasis on achieving both increased efficiency and operational flexibility. My work has contributed to enhancing the understanding of how modern technology can be applied to meet the growing demands for reliable and sustainable energy production in the hydropower sector.
2023
-
Karekezi, Yannick Cyiza;
Zhang, Zhaoqiang;
Olsen, Pål Keim.
(2023)
Segmentation Effects in the Modular HVDC Offshore Wind Generator and its Impact on Losses.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
2022
-
Karekezi, Yannick Cyiza;
Melfald, Emil Ghieh;
Øyvang, Thomas;
Nøland, Jonas Kristiansen.
(2022)
Loss Modeling of Large Hydrogenerators for Cost Estimation of Reactive Power Services and Identification of Optimal Operation.
IEEE transactions on energy conversion
Academic article
-
Nøland, Jonas Kristiansen;
Karekezi, Yannick Cyiza;
Hjelmeland, Martin N..
(2022)
160 gigawatt norsk havvind blåser eksportverdien ned mot null.
Teknisk Ukeblad
Popular scientific article
-
Nøland, Jonas Kristiansen;
Karekezi, Yannick Cyiza;
Hjelmeland, Martin N..
(2022)
Nei, havvind alene kan ikke erstatte all norsk gasseksport.
Teknisk Ukeblad
Feature article
-
Karekezi, Yannick Cyiza;
Øyvang, Thomas;
Nøland, Jonas Kristiansen.
(2022)
The Energy Transition's Impact on the Accumulated Average Efficiency of Large Hydrogenerators.
IEEE transactions on energy conversion
Academic article
-
Karekezi, Yannick Cyiza;
Hjelmeland, Martin N.;
Nøland, Jonas Kristiansen.
(2022)
Det norske vindkrafteventyret trenger kjernekraft.
NRK Ytring
Feature article
Journal publications
-
Karekezi, Yannick Cyiza;
Melfald, Emil Ghieh;
Øyvang, Thomas;
Nøland, Jonas Kristiansen.
(2022)
Loss Modeling of Large Hydrogenerators for Cost Estimation of Reactive Power Services and Identification of Optimal Operation.
IEEE transactions on energy conversion
Academic article
-
Nøland, Jonas Kristiansen;
Karekezi, Yannick Cyiza;
Hjelmeland, Martin N..
(2022)
160 gigawatt norsk havvind blåser eksportverdien ned mot null.
Teknisk Ukeblad
Popular scientific article
-
Nøland, Jonas Kristiansen;
Karekezi, Yannick Cyiza;
Hjelmeland, Martin N..
(2022)
Nei, havvind alene kan ikke erstatte all norsk gasseksport.
Teknisk Ukeblad
Feature article
-
Karekezi, Yannick Cyiza;
Øyvang, Thomas;
Nøland, Jonas Kristiansen.
(2022)
The Energy Transition's Impact on the Accumulated Average Efficiency of Large Hydrogenerators.
IEEE transactions on energy conversion
Academic article
-
Karekezi, Yannick Cyiza;
Hjelmeland, Martin N.;
Nøland, Jonas Kristiansen.
(2022)
Det norske vindkrafteventyret trenger kjernekraft.
NRK Ytring
Feature article
Part of book/report
-
Karekezi, Yannick Cyiza;
Zhang, Zhaoqiang;
Olsen, Pål Keim.
(2023)
Segmentation Effects in the Modular HVDC Offshore Wind Generator and its Impact on Losses.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
Teaching
Supervision
Course - Electrical Machines and Electromagnetic Energy Conversion - TET4110 - NTNU
Description: I have graded exams and served as an examiner in the course. I have done this for both the regular exam and the re-sit exam.
Course - Energy and Environment-TEP4225-NTNU
Description: I have led and delivered lectures in the course. In addition to having been an examiner in the course.