A5068785332- HVDC Systems and Fault Protection
- Frequency Control in Power Systems
- Wind Turbine Control Systems
- Microgrid Control and Optimization
- Wind Energy Research and Development
- Vacuum and Plasma Arcs
- Superconducting Materials and Applications
- Semiconductor materials and devices
- Integrated Circuits and Semiconductor Failure Analysis
- Electrical Fault Detection and Protection
- Maritime Transport Emissions and Efficiency
- Physics of Superconductivity and Magnetism
- Islanding Detection in Power Systems
- Magnetic Bearings and Levitation Dynamics
- Acoustic Wave Resonator Technologies
University of Strathclyde
2020-2023
Tanta University
2013-2023
University of Bath
2018-2019
With increased penetration of wind energy as a renewable source, there is need to keep turbines connected the grid during different disturbances such faults. In this paper, use superconducting fault current limiter (SFCL) proposed reduce level at stator side and improve ride-through (FRT) capability system. To highlight technique, doubly fed induction generator (DFIG) considered wind-turbine generator, where whole system simulated using PSCAD/EMTDC software. Detailed simulation results are...
As the capacity of all-electric ships (AESs) increases dramatically, sudden changes in system load may lead to serious problems, such as voltage fluctuations ship power grid, increased fuel consumption, and environmental emissions. In order reduce effects on efficiency, maintain bus voltage, we propose a hybrid energy storage (HESS) for use AESs. The HESS consists two elements: battery high density superconducting magnetic (SMES) storage. A dynamic droop control is used charge/discharge...
This paper introduces a new scheme, which uses multifunctional superconducting device that can be used as an energy storage and fault current limiter. It is denoted magnetic storage-fault limiter (SMES-FCL) modeled number of pancakes. connected to wind turbine power system via tertiary transformer converters. A complete control scheme built achieve effective transfer between the coil during normal operation smooth output power. The limiting function implemented using technique inserts few...
The increase in aircraft passengers and airfreight traffic has given rise to concerns about greenhouse gas emissions for traditional the resulting damage environment. This led several companies organizations, including NASA, set goals enhance efficiency as well reduce fuel burn, pollution, noise commercial aircraft. most notable electric (EA) concept is N3-X, which was developed by NASA achieve environmental while maintaining annual growth of aviation industry. However, one main challenges...
Superconducting devices have emerged in many applications during the last few decades. They offer advantages, including high efficiency, compact size, and superior performance. However, main drawback of these is cost. An option to reduce cost improve cost-benefit ratio integrate two functions into one device. This paper presents superconducting fault current limiting transformer (SFCLT) as a alternative normal power transformers. The has windings also provides capability currents. SFCLT...
With the high penetration of Renewable Energy Sources (RES) in power systems, short-circuit levels have changed, creating requirement for altering or upgrading existing switchgear and protection schemes. In addition, continuous increase (accounting both generation demand) has imposed, some cases, need reinforcement system assets such as feeders, transformers, other substation equipment. To overcome these challenges, development superconducting devices with fault current limiting capabilities...
To reduce emissions from the aviation industry and meet targets set by different countries, research has been focused on investigating all-electric aircraft.To make this vision practical, superconducting machines are expected to power propellers, as they half size a third weight of conventional machines.The main purpose paper is do higher-level study reliable holistic protection system for aircraft; that can heat leakage be able detect faults reliably.Thus, three systems were investigated;...
Recently, superconducting fault current limiters (SFCLs) were proposed as an advanced device for ride through (FRT) capability of DFIG wind turbines without the need controller and additional power electronic devices. However, minimizing cost SFCL maximizing enhancement FRT capability, it is needed to investigate effect parameters on which main goal this paper. A detailed model resistive type has been implemented integrated with a turbine using PSCAD/EMTDC software. took into consideration...
Abstract The main weakness of the Yanagisawa negative‐impedance‐converter circuit is large phase shift its current conversion gain h 21 at higher frequencies. reason for this collector capacitances two transistors. addition suggested here a capacitor that balances out effect these as far concerned. A real and constant results, up to Another compensates transistor on 22 . remaining parameters need no such compensation. Experimental results confirm all conclusions.