Essays about: "difference frequency generation"

Showing result 6 - 10 of 28 essays containing the words difference frequency generation.

  1. 6. Future Nordic Grid Frequency Quality : A quantitative simulation study of current and potential frequency control methods with emphasis on synthetic inertia

    University essay from Uppsala universitet/Elektricitetslära

    Author : Emil Arvidsson; [2021]
    Keywords : grid frequency; synthetic inertia; frequency control; power grid; hydro power;

    Abstract : The power grid faces stability problems due to loss of inertia. The ancillary services balancing the system must be improved to maintain stability. READ MORE

  3. 7. Dielectric Response of SiC-based Stress Grading Material Used in Electrical Machines

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Shilin Zhao; [2021]
    Keywords : Dielectric frequency response; End corona protection; Finite element method; High voltage rotating machines; Stator insulation; Dielektrisk frekvensrespons; Ändglimmskydd; Finita element metoden; Högspänningsmaskiner; Statorisolering;

    Abstract : High Voltage (HV) rotating machines are widely used in power generation and heavy industry companies. Silicon Carbide (SiC) material is used in the stress grading structure of HV electric machines because of its non-linear characteristic. READ MORE

  4. 8. Positioning in Non-Terrestrial Networks

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Soha Emara; [2021]
    Keywords : positioning; 5G; satellite; NTN; Technology and Engineering;

    Abstract : In 5G communications, Non-terrestrial Network (NTN) is envisioned to complement Terrestrial Network (TN) to increase network availability, scalability and continuity. Positioning of User Equipment (UE) is critical for the operation of NTN. Currently, NTN uses Global Navigation Satellite System (GNSS) for positioning. READ MORE

  5. 9. Large Scale Analysis of Massive Deployment of Converter-based Generation equipped with Grid- forming Strategies

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Cristhian Carim Jimenez Saldana; [2020]
    Keywords : Grid-Forming; Converter-Based Generation; Voltage Source Converter VSC ; Current Limitation; Threshold-Virtual Impedance TVI ;

    Abstract : To mitigate the carbon footprint and the need to fulfil the energy goals in terms of sustainability, it is required to deploy a large integration of green energies. Therefore, in the previous and the coming years, there will be a high research and technological interest in the high penetration of converter-based generation. READ MORE

  6. 10. Dispersion management and characterization of ultrashort laser pulses for the optimization of parametric processes

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Axel Elfving; [2019]
    Keywords : frequency resolved optical gating; optical parametric amplification; difference frequency generation; nonlinear optics; laser pulse compression; lasers; optics; Technology and Engineering; Physics and Astronomy;

    Abstract : This thesis set out to continue the development of a short-wave infrared (SWIR) optical parametric amplifier (OPA). The system is based on a Yb-ber chirped pulse amplification (CPA) laser delivering 400 fs long pulses, centered around 1030 nm, at 200 kHz repetition rate and 40 W average power. READ MORE