Sökning: "angle oscillation"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden angle oscillation.

  1. 1. The role of location of low inertia in power systems

    Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Bashar Alahmad; [2021]
    Nyckelord :Low inertia; Frequency stability; Rotor-angle stability; Nordic 32; Kundur; PowerFactory; Small-signal stability; Inter-area oscillation; Rate of Change of Frequency.;

    Sammanfattning : The plans to reduce the energy-related greenhouse gas emissions stimulate the deployment of electronically interfaced renewable resources. The increased penetration of such intermittent sources together with phasing conventional power plants out and the installation of High Voltage Direct Current (HVDC) links for long-distance more efficient transmission, reduces the stored inertia in any electrical grid. LÄS MER

  3. 2. Evaluation of Power Oscillation Damping in the Nordic Grid Using HVDC

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Johan Hansson; [2020]
    Nyckelord :;

    Sammanfattning : With a rapid transition towards renewable energy sources and increasing demand for electricity, we are facing major changes in the electricity grid. With increased congestion and reduction of inertia the grid is becoming more sensitive to rotor angle stability issues, such as the stability of interarea modes or power oscillation damping (POD). LÄS MER

  4. 3. Generation and Characterization of Intense Attosecond Pulses

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Marius Plach; [2020]
    Nyckelord :Attosecond physics; high-order harmonic generation; high harmonic generation; HHG; attosecond pulses; molecular dynamics; attosecond pulse generation; harmonic emission time delay; temporal reconstruction of attosecond pulses; strong field processes; Three-step model; RABBIT; Reconstruction of Attosecond Beating By Interference of Two-photon Transition; Terawatt Laser System; Intense XUV Beamline; XUV; LLC; Physics and Astronomy;

    Sammanfattning : Research on ultrafast dynamics in atoms and molecules requires short pulses. In order to resolve processes taking place on a femtosecond timescale sufficiently, these pulses require a duration on the attosecond time scale. LÄS MER

  5. 4. Analysis of Hybrid Offshore Floating Wind and Marine Power

    Magister-uppsats, Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

    Författare :Sai Varun kollappillai Murugan; [2018]
    Nyckelord :;

    Sammanfattning : Wind energy is a major part of renewable energy production. With fossil fuel depletion and climate change at the cusp, it is an absolute need to implement or evolve the current source or utilization of renewable energy. The wind has been dominating the onshore for many decades and offshore wind turbines are available at shallow depths. LÄS MER

  7. 5. Optimization of liquid flow rate distribution in etching modules through numerical simulationsand experiments

    Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

    Författare :Lorenzo Natale; [2017]
    Nyckelord :Photochemical machining; etching; corrosion; spray nozzles; material removal processes;

    Sammanfattning : The purpose of this study was to simulate the liquid flow rate distribution in the etching modules and find the optimal setup in order to achieve a distribution as homogenous as possible. The commercial software Matlab 2015a has been employed for all the numerical simulations. The optimization has been carried out varying several parameters, i.e. LÄS MER