Sharif Digital Repository

Dynamic modeling of a wind turbine with brushless doubly fed induction generator

Author

Tohidi, S.

Pub. Year

2012

Subjects

Brushless doubly fed induction generator. / Brushless doubly fed. / Dynamic modeling. / Model simplification. / Participation factors. / Reduced order models. / Small-signal analysis. / System mode. / Time-domain simulations. / Transient studies. / Variable speed wind turbines. / Dynamics. / Power electronics. / Signal analysis. / Wind turbines.

An analytical study for low voltage ride through of the brushless doubly-fed induction generator during asymmetrical voltage dips

Author

Gholizadeh, M.

Publisher

Elsevier Ltd,

Pub. Year

2018

Subjects

Asymmetrical voltage dips. / Brushless doubly fed induction generator (BDFIG) / Coupled circuit model. / Ride-through.

An Adaptive Series-Dynamic-Resistor-Based Protection Scheme for Brushless Doubly- Fed Induction Generator Under Asymmetrical Fault Conditions

Author

Gholizadeh, M.

Pub. Year

2024

Subjects

Asynchronous generators. / Circuit oscillations. / Electric equipment protection. / Electric fault currents. / Electric power system protection. / Integrated circuit manufacture. / Power quality. / Surge protection. / System stability. / Timing circuits. / Wind power. / Brushless doubly fed induction generators. / Circuit faults. / Doubly fed induction generators. / Grid codes. / Lower Voltage Ride Through. / Power systems stability. / Resistance. / Series dynamic resistor. / Voltage dip detection. / Voltage fluctuations. / Resistors.

A fast and novel method of pattern synthesis for non-uniform phased array antennas

Author

Tohidi, E.

Publisher

IEEE Computer Society,

Pub. Year

2015

Subjects

Antenna arrays. / Directional patterns (antenna) / Least squares approximations. / Radar. / Radar antennas. / Synthesis (chemical) / Angular positioning. / High-directivity. / Least square errors. / Low sidelobe level. / Nonuniform arrays. / Pattern nulling. / Pattern synthesis. / Phased array antennas. / Antenna phased arrays.

Antenna and pulse selection for colocated MIMO radar

Author

Tohidi, E.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2018

Subjects

Convex optimization. / Cramer-Rao bounds. / Economic and social effects. / MIMO systems. / Radar antennas. / Transmitters. / Colocated MIMO radars. / Cramer-rao lower bound. / Multiple input multiple output (MIMO) radars. / Multiple transmitters. / Optimization approach. / Performance measure. / Prescribed performance. / Velocity estimation. / MIMO radar.

Antenna placement in a compressive sensing-based colocated mimo radar

Author

Ajorloo, A.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2020

Subjects

Antenna placement. / Coherence measure. / Compressive sensing (CS) / Convex problem. / Multiple-input-multiple-output (MIMO) radar. / Sensing matrix. / Antenna arrays. / Compressed sensing. / Convex optimization. / Iterative methods. / Location. / MIMO systems. / Probability distributions. / Radar antennas. / Radar signal processing. / Radio transceivers. / Tracking radar. / Colocated MIMO radars. / Compressive sensing. / Detection performance. / Iterative algorithm. / Multiple input multiple output (MIMO) radars. / Optimization approach. / Selection problems. / MIMO radar.

Controller-switch assignment in 5G networks

Author

Tohidi, E.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2019

Subjects

5G Networks. / Controller-Switch Assignment. / SDN. / Controllers. / Queueing networks. / Software reliability. / Assignment algorithms. / Centralized controllers. / Development trends. / Distributed controller. / Distributed software. / Fast implementation. / G-networks. / Performance and reliabilities. / 5G mobile communication systems.

Compressed-domain detection and estimation for colocated MIMO radar

Author

Tohidi, E.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2020

Subjects

Capon beamformer. / Clutter suppression. / Colocated multiple-input multiple-output (MIMO) radar. / Compressed-domain signal processing. / Beamforming. / Compressed sensing. / MIMO systems. / Object recognition. / Radar signal processing. / Receiving antennas. / Colocated MIMO radars. / Compressed domain. / Compressive sensing. / Hypothesis testing. / Multiple input multiple output (MIMO) radars. / Receiver operating characteristic curves. / Sample complexity. / MIMO radar.

Dynamic programming applied to large circular arrays thinning

Author

Tohidi, E.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2018

Subjects

Dynamic programming (DP) / Narrow beamwidth. / Sidelobe level (SLL) / Antenna arrays. / Energy utilization. / Array thinning. / Beam widths. / Dynamic programming algorithm. / Hardware complexity. / High angular resolutions. / Low sidelobe level. / Optimization problems. / Sidelobe levels. / Dynamic programming.

Influence of model simplifications and parameters on dynamic performance of grid connected fixed speed wind turbines

Author

Tohidi, S.

Pub. Year

2010

Subjects

Fixed-speed wind turbine-generator (FSWTG) / Torsional mode. / Comprehensive studies. / Eigen analysis. / Eigenvalues. / Fixed speed wind turbine. / Fixed speed wind turbine generator. / Grid-connected. / Model simplification. / Modeling. / ON dynamics. / Participation factors. / Power systems. / Reduced order models. / Simplifying assumptions. / Small signal stability. / Small-signal analysis. / Torsional modes. / Turbine generator. / Wind farm. / Eigenvalues and eigenfunctions. / Electric machinery. / Electric power systems. / Electric utilities. / Modal analysis. / Signal analysis. / Turbogenerators. / Wind turbines. / Wind power.

Conductive, injectable, and self-healing collagen-hyaluronic acid hydrogels loaded with bacterial cellulose and gold nanoparticles for heart tissue engineering

Author

Tohidi, H.

Pub. Year

2024

Subjects

Biocompatible materials. / Cellulose. / Myocytes, cardiac. / Rheology. / Tissue engineering. / Cell engineering. / Conductive materials. / Physiological models. / Scaffolds (biology) / Tissue. / Tissue regeneration. / Genipin. / Nanocomposite. / Nanofiber. / Biomaterial. / Collagen. / Gold. / Hyaluronic acid. / Hydrogel. / Metal nanoparticle. / Bacterial cellulose. / Dynamic mechanical property. / Electrically conductive. / Electrically conductive biomaterial. / Gold nanoparticle. / Human stem cell. / Self-healing. / Thermo-sensitive hydrogel. / Animal cell. / Biocompatibility. / Biodegradability. / Cardiac stem cell. / Cell growth. / Cell viability. / Controlled study. / Cross linking. / Cytotoxicity. / Electric conductivity. / Electrophysiology. / Electrostimulation. / Elemental analysis. / Embryonic stem cell. / Extracellular matrix. / Fourier transform infrared spectroscopy. / Gelation. / Heart function. / Heart tissue. / Human embryonic stem cell. / Nonhuman. / Rat. / Regenerative medicine. / Scanning electron microscopy. / Surface plasmon resonance. / Swelling. / Temperature. / Thermoreceptor. / Ultraviolet visible spectroscopy. / Cardiac muscle cell. / Chemistry. / Cytology. / Drug effect. / Flow kinetics. / Heart. / Injection. / Physiology. / Procedures. / Tissue scaffold. / Stem cells. / Engineering.

A control scheme to enhance low voltage ride-through of brushless doubly-fed induction generators

Author

Tohidi, S.

Publisher

John Wiley and Sons Ltd

Pub. Year

2016

Subjects

Back-EMF voltage. / Wind power generation. / AC generators. / Electric generators. / Electric machine control. / Electric machinery components. / Electric power generation. / Electric power transmission networks. / Time domain analysis. / Wind power. / Wind turbines. / Back electromotive force. / Back-emf. / Brushless doubly fed induction generator (BDFIG) / Doubly fed induction generator (DFIG) / Low-voltage ride-through. / Variable speed operations. / Voltage dip. / Asynchronous generators.

A control scheme to enhance low voltage ride-through of brushless doubly-fed induction generators

Author

Tohidi, S.

Publisher

John Wiley and Sons Ltd,

Pub. Year

2015

Subjects

Back-EMF voltage. / Low voltage ride-through (LVRT) / Voltage dip. / Wind power generation. / AC generators. / Electric generators. / Electric machine control. / Electric machinery components. / Electric power generation. / Electric power transmission networks. / Time domain analysis. / Wind power. / Wind turbines. / Back electromotive force. / Back-emf. / Brushless doubly fed induction generator (BDFIG) / Doubly fed induction generator (DFIG) / Variable speed operations. / Asynchronous generators.

Linear array thinning using iterative FFT plus soft decision

Author

Tohidi, E.

Pub. Year

2013

Subjects

FFT techniques. / Forward-and-backward. / Fourier techniques. / Iteration cycle. / Linear arrays. / Low sidelobe level. / New approaches. / Sidelobe levels. / Antennas. / Array processing. / Fast Fourier transforms. / Radar. / Iterative methods.

A wet cold-flow technology for tackling offshore flow-assurance problems

Author

Azarinezhad, R.

Pub. Year

2010

Subjects

Active heating. / Aging reservoir. / Aqueous phase. / Carrier fluids. / Closed-loop. / Cold flows. / Conventional approach. / Crystal size. / Deepwater operation. / Flow assurance. / Flow technology. / Flow-based methods. / Gasphase. / High water-cut. / Hydrate formation. / Industry needs. / Kinetic hydrate inhibitors. / Latest development. / Liquid Phase. / Offshore flows. / Operational costs. / Produced water. / Recirculations. / Reservoir brine. / Slurry viscosity. / Thermodynamic inhibitors. / Agglomeration. / Environmental impact. / Glycols. / Hydration. / Hydrocarbons. / Methanol. / Petroleum reservoir evaluation. / Pipelines. / Seawater effects. / Slurries. / Water recycling. / Gas hydrates.

Periodicity in contrast with sidelobe suppression in random signal radars

Author

Tohidi, E.

Pub. Year

2011

Subjects

Masking effect. / Noise radars. / Periodicity. / Random signal. / Side-lobe reduction. / Side-lobe suppression. / Sidelobe. / Waveform designs. / Radar.

Influence of different series dynamic resistors on low-voltage ride-through of brushless doubly fed induction generator

Author

Tohidi, S.

Publisher

Taylor and Francis Inc,

Pub. Year

2015

Subjects

Brushless doubly fed induction generator. / Series dynamic resistor. / Wind turbine. / Electric generators. / Electric power transmission networks. / Machine windings. / Modal analysis. / Reactive power. / Resistors. / Time domain analysis. / Wind turbines. / Winding. / Brushless doubly fed induction generators. / Control windings. / Doubly fed induction generator (DFIG) / Fault ride-through. / Grid code requirements. / Grid connections. / Low-voltage ride-through. / Time-domain simulations. / Asynchronous generators.

Analysis and enhancement of low-voltage ride-through capability of brushless doubly fed induction generator

Author

Tohidi, S.

Pub. Year

2013

Subjects

Brushless doubly fed induction generator (BDFIG) / Voltage dip. / Alternative approach. / Brushless doubly fed. / Coupled-circuit model. / Dynamic behaviors. / Feasibility region. / Grid fault. / Low-voltage ride-through. / Reactive power controllers. / Resistor circuits. / Ride-through. / Ridethrough capability. / Terminal voltages. / Theoretical result. / Circuit theory. / Coupled circuits.

Compressive sensing MTI processing in distributed MIMO radars

Author

Tohidi, E.

Publisher

Institution of Engineering and Technology,

Pub. Year

2018

Subjects

Channel estimation. / Clutter (information theory) / Compressed sensing. / MIMO systems. / Radar cross section. / Radar signal processing. / Radar systems. / Signal receivers. / Compressive sensing. / Detection performance. / Distributed MIMO. / Moving target indication. / Multiple input multiple output (MIMO) radars. / Signal modeling. / Spatial diversity. / Strong clutters. / MIMO radar.