Dr Saeed Jahdi
CEng, FHEA, SMIEEE, PhD, MSc, BSc
Expertise
Reliability and efficiency of energy conversion in power electronics converters by high voltage power semiconductor devices in renewables-enabled smart grids, electric vehicles, automotive & aviation to tackle global warming.
Current positions
Senior Lecturer in Power Electronics
School of Electrical, Electronic and Mechanical Engineering
Contact
Press and media
Many of our academics speak to the media as experts in their field of research. If you are a journalist, please contact the University’s Media and PR Team:
Biography
Dr Saeed Jahdi has received the degree of BSc in Electrical Power Engineering from the University of Science and Technology, the degree of MSc with Distinction in Power Systems from City University London, and the degree of PhD in Power Electronics from the University of Warwick. Following his PhD, he joined the HVDC Center of Excellence of GE Grid Solutions in Stafford, UK as a power electronics engineer working on GE's first modular multi-level (MMC) voltage-sourced converter (VSC) in HVDC systems. During his time in General Electric, he was active in different aspects of design and commissioning of various VSC-HVDC converters, including power electronics simulations, conducting operational and protection type-tests, project documentation and onshore and offshore site installation in the UK, Sweden, Germany, France & Italy to transmit renewable energy sources such as offshore wind farms in North Sea to European grids. After almost four years of gaining industrial experience in GE, Dr Jahdi was appointed as a lecturer in power electronics in Electrical Energy Management Group of University of Bristol. His current research interest is on investigation of reliability and efficiency optimization of energy conversion in high voltage power electronics converter topologies which could best employ the advantages offered by recently emerged wide-bandgap power semiconductor devices, i.e. SiC & GaN devices.
Research interests
My current research interests are investigating the reliability and efficiency optimization of energy conversion in high voltage power electronics converters used in applications such as HVDC and FACTS power electronics in smart grids, electric vehicles drive-trains and more-electric-aircrafts power distribution to address global warming and climate change. To this end, and in-line with my academic and industrial experience, I am currently seeking to explore prospective converter topologies which can best employ the advantages offered by recently emerged wide bandgap power semiconductor devices.
Research Group: Electrical Energy Management Group (EEMG)
http://www.bristol.ac.uk/engineering/research/em/
I am currently the first supervisor (lead) for the following PhD candidates:
- Yasin Gunaydin: Analysis of Performance and Reliability of Sub-kV SiC and GaN Cascode Power Electronic Devices
Links:
https://research-information.bris.ac.uk/files/381359838/Final_Copy_2023_10_3_Gunaydin_Y_PhD.pdf
https://hdl.handle.net/1983/8b9a25a2-9326-4539-ad4a-4db1e7d928c2
- Juefei Yang: Analysis of Dynamic Performance of GaN Power Electronics Devices
- Chengjun Shen: Design of gate drivers for high voltage power semiconductor devices
- Mana Hosseinzadeh: Performance of Silicon Carbide power MOSFETs in electric vehicles drive-train
- Renze Yu: Reliability of Silicon Carbide power MOSFETs in harsh environments
I am currently the co-supervisor for the following PhD candidates:
- Trevor Leung: Implementation of Infinity Current Sensor in Active Gate Drives
- Qilei Wang: Active Gate Driving for SiC power Devices
- Yushi Wang: Enhanced Active Gate Driving for GaN Power Devices
I am currently the co-supervisor for the following MRes candidates:
- Sergejs Leonovs: Alleviating Oscillations in GaN power circuits through Active Gate Drive Control and Evolutionary Multi-objective Optimization
I am acting as a PhD Viva Examiner in Electrical Power Engineering.
PhD Scholarships
Candidates interested in a PhD in Power Electronics may directly email their CV.
Departmental RolesI am the School's Senior International Tutor.
I am currently the EE department's academic lead for the 'Year-in-Industry' program.
I am also the EE department's careers and employability academic lead.
Teaching2021/22 Teaching: Unit director for the Power Electronics, Machines & Drive Technologies and Low Carbon Energy Systems modules.
2020/21 Teaching: Unit director for the Power Electronics, Machines & Drive Technologies module and Contributor to Electro-Mechanical System Design.
2019/20 Teaching: Unit director for the Linear Control Systems and Industrial Electronics 3 modules.
2018/19 Teaching: Unit director for the Linear Control Systems and Industrial Electronics 3 modules.
2020/21 Academic Tutor for the 3rd Year Group Project
2019/20 Academic Tutor for the 3rd Year Group Project
2021/22 Final Year Research Projects Supervised:
- Design and fabrication of low-inductance gate drivers for power transistors
- Design & fabrication of step-down converter for high efficiency conversion
- Design & fabrication of double-pulse board for evaluation of power transistors
- Design & fabrication of test boards to analyse power semiconductor devices
- Design & fabrication of step-up power converter for high voltages
- Fabrication of unipolar & bipolar drivers for semiconductor devices
- Design & fabrication of a low-inductance step-down voltage converter
2020/21 Final Year Research Projects Supervised:
- Voltage profile analysis of distribution power systems in presence of distributed generation
- Modelling and compensation methods in distribution load flow analysis and voltage profile recovery of renewable sources
- Analysis of impact of FACTS equipment in compensation of power systems
- Analysis of Faults in AC Systems and impact of HVDC transmission on its characteristics
- Load flow analysis in presence of synchronous and induction machines, with different types of cable bundling and generators
- Analysis of impact of grid connection of a wind turbine on power quality of a power system
- Compensation effects of fixed series and shunt capacitor of reactive power of renewable energy generation
- Analysis of parameters of a power network in the presence of a STATCOM and SVC
- Analysis of Power Systems Metrics in Presence of HVDC Lines
2019/20 Final Year Research Projects Supervised:
- Evaluation of impact of silicon superjunction MOSFETs on performance of step-down converters
- Design of a Buck Converter by means of Silicon Carbide MOSFETs
- Design and implementation of gate drivers for improved performance characteristics of power transistors
- Investigation of different IGBT technologies for power electronics applications
- Analysis of implementation restrictions of Gallium Nitride power devices in power converters
2018/19 Final Year Research Projects Supervised:
- Design and fabrication of 230V/5V voltage converter
Projects and supervisions
Research projects
High-Density Active Silicon Carbide Power Electronics: Enabling Responsive Power Conversion
Principal Investigator
Managing organisational unit
School of Electrical, Electronic and Mechanical EngineeringDates
01/12/2023 to 30/11/2026
8031 SUPERGEN Silicon Carbide in Energy Networks Outreach Program- S Jahdi
Principal Investigator
Managing organisational unit
Department of Electrical & Electronic EngineeringDates
01/10/2021 to 30/09/2022
8461 SUPERGEN Silicon Carbide in Energy Networks Outreach Program- S Jahdi
Principal Investigator
Managing organisational unit
School of Electrical, Electronic and Mechanical EngineeringDates
01/10/2021 to 30/09/2022
8031 Supergen Energy Networks hub - Multi-vector FLOW Energy Transmission Solutions Assessment
Principal Investigator
Managing organisational unit
Department of Electrical & Electronic EngineeringDates
01/05/2021 to 30/04/2022
8461 Supergen Energy Networks hub - Multi-vector FLOW Energy Transmission Solutions Assessment
Principal Investigator
Managing organisational unit
School of Electrical, Electronic and Mechanical EngineeringDates
01/05/2021 to 30/04/2022
Thesis supervisions
Alleviating oscillations in GaN power circuits through active gate drive control and evolutionary multi-objective optimization
Supervisors
Reliability analysis of planar and symmetrical & asymmetrical trench discrete SiC Power MOSFETs
Supervisors
Analysis of Performance and Reliability of Sub-kV SiC and GaN Cascode Power Electronic Devices
Supervisors
Analysis of performance of SiC bipolar semiconductor devices for grid-level converters
Supervisors
Publications
Recent publications
29/08/2024Accelerated Power Cycling of GaN HEMTs using Switching Loss and Fast Temperature Measurement
PCIM Europe 2024
Dynamic Transients and Reliability of High-Voltage Silicon & 4H-SiC Bipolar Junction Transistors Under Avalanche and Short-Circuits
PCIM Europe 2024; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
‘Infinity Gate Sensor’: a Differential Magnetic Field Sensor for Measuring Gate Current of SiC Power Transistors
PCIM Europe 2024; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
Instrumentation Requirements for Fast 130+ V/ns Switching of 1700 V, 35 mΩ SiC MOSFETs
PCIM Europe 2024; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
Performance Instability of 650 V p-GaN Gate HEMT Device under Temperature-related Positive Gate Bias Stresses
PCIM Europe 2024; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management