A5014694680- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Microgrid Control and Optimization
- Photovoltaic System Optimization Techniques
- Advanced Battery Technologies Research
- Islanding Detection in Power Systems
- Silicon Carbide Semiconductor Technologies
- Electric Motor Design and Analysis
- Power Systems and Renewable Energy
- HVDC Systems and Fault Protection
- Advanced Fiber Laser Technologies
- Energy Harvesting in Wireless Networks
- High-Voltage Power Transmission Systems
- Magnetic Bearings and Levitation Dynamics
- GaN-based semiconductor devices and materials
- Laser-Matter Interactions and Applications
- Photonic and Optical Devices
- Wind Turbine Control Systems
- Neural Networks and Reservoir Computing
- Induction Heating and Inverter Technology
- Orbital Angular Momentum in Optics
- Thin-Film Transistor Technologies
- Vibration and Dynamic Analysis
- Power System Reliability and Maintenance
- Solar Thermal and Photovoltaic Systems
Aswan University
2016-2024
Technology Innovation Institute
2024
Universität Hamburg
2021
Hamburg University of Technology
2021
Menoufia University
2021
Kyushu University
2014-2017
Through comprehensive study for the power converters that have emerged previously switched reluctance machine (SRM) drive system, this paper proposes an evaluation approach to determine suitability of these using in SRM-based electric vehicle (EV) system. This reflects relative differences terms their cost as well capability offer best technical performance system EVs. From viewpoint, four factors are considered follow: converter efficiency, reliability, reduce torque ripple, and increase...
In this study, we report a first experimental demonstration of pulse compression by gradual refractive index front moving in periodically modulated silicon waveguide, the so-called optical push broom effect. Optical captures and confines input signal faster propagating front, driven pump pulse. This is spatio-temporal analogue light trapping tapered plasmonic waveguide where continuously changing its wavevector approaching zero group velocity and, thus, stopped without reflection. Here...
In photovoltaic systems, parasitic capacitance is often formed between PV panels and the ground. Because of switching nature converters, a high-frequency voltage usually generated over these capacitances; this, in turn, can result common-mode current known as leakage current. This badly reach high value if resonance circuit excited through PV’s converter’s inductive components. Transformers are used for mitigation. However, this decreases efficiency increases cost, size, weight systems....
To enhance the stability and reliability of system, converters' parallel operation can be cascaded to address constraints posed by substantial integration renewable resources. Buck-boost DC-DC converters are often controlled via a control approach allow operation. The converter's output current its voltage will nested loop control. This study proposes adaptive droop parameters that updated verified online using principal sharing loops minimize fluctuation in load sharing. When microgrid...
Recently, renewable distributed generation (DG) systems have emerged to improve the power system security and reliability while reducing environmental incompatibility of fossil fuel plants. DG could operate either as a standalone and/or grid-connected system. The interfacing circuits their controls comply with utility quality regulations afford seamless transition from online offline vice versa. This article advises simple robust control scheme for modular multilevel converter (MMC) that...
This article proposes a novel single-phase microinverter that is fit to process the power of two photovoltaic (PV) modules in modular way. The proposed topology combines full-bridge inverter integrated with dc-dc boost converters, addition dc link consists switched capacitor (SC) networks. operating modes are illustrated. voltage stress all components identified. A modulation technique along control system developed for proper operation topology. comparative study other topologies...
Conventional LED drive has a limited lifetime due to present of bulky electrolytic output capacitor (E-Cap) which is essential make the power difference balancing between constant and pulsating input power. In fact, chip longer than E-Cap. Therefore, it insufficient use this type capacitors in driver. Increasing lamp can be achieved through changing E-Cap with Film or Ceramic one. But current peak will double as result using low energy density capacitors. However, driven by defined value....
LCL filters are widely used for grid-connected converters because its superiority over L and LC filters, however the resonance problem produced by these requires a more effort in design process to damp it. Active damping techniques which use sensed capacitor current this regard solve problem; an increase number of sensors. Based on optimum PI controller, paper introduces active method based estimated without This is achieved using additional observer loop as feedback controller estimate...
Summary This paper proposes three‐phase microinverter able to process the power of three PV modules simultaneously and independently; thus, efficient utilization through distributed maximum point tracking (DMPPT) is realized. The proposed employs switched capacitors (SCs) networks combined with voltage source inverter; it named capacitor buck‐boost inverter abbreviated as SC‐BBVSI. connections SCs are determined fulfill high boosting gain along minimized leakage currents. In addition, low...
This paper presents a multi-input Ćuk-derived Buck-Boost voltage source inverter (CBBVSI) for Photovoltaic (PV) systems. The proposed topology consists of single-stage DC-AC that combines both DC-DC and stages. stage is used stepping-up the from PV generator. Simultaneously, interfacing with AC grid. allows three sources to utilize antiparallel diodes each leg transferring energy. system exhibits several features such as reduction number components compared typical two-stage structures,...
PWM converters are widely used to connect the distributed energy sources grid. LCL filters for these because its superiority over L and LC filters, however resonance problem produced by requires a more effort in design process damp it. Active damping techniques which use sensed capacitor current this regard solve problem; an increase number of sensors. Based on optimum proportional plus resonant (P+R) controller, paper introduces active method based estimated without This is achieved using...
Switched reluctance machines (SRMs) have received increasing attention for their many potential uses, such as wind power and electric vehicle (EV) drive systems. The Quasi-Z-source Integrated Multiport Converter (QZIMPC) was recently introduced to improve the reliability of SRM driver through small capacitance values. It is not possible, however, simultaneously energize deenergize two phases in QZIMPC. This phenomenon can significantly increase commutation period which, turn, degrades...
This paper presents a new axial flux modular stator hybrid excitation switched reluctance motor (AFMHSRM) by applying and structures. First, the initial dimensions of three AFMHSRMs with permanent magnet (PM) located at different positions in are presented. The torque linkage characteristics AFMHSRM qualitatively analyzed compared based on magnetic equivalent circuit (MEC)method. influence PM itself PMs' position static is finite element analysis (FEA) method. Simultaneously, it thickness...
Two feedback active damping technique for LCL filter resonance is proposed using the capacitor voltage and grid current. The method derived in continuous time domain with discussion its discrete implementation. Based on method, excitation of un-stable open loop pools, which implies non-minimum phase behavior, can be avoided over a wide range resonant frequencies; Co-design procedures both loops along fundamental current regulator are presented. Numerical example simulation work presented to...