Sökning: "Reactive power"

Visar resultat 1 - 5 av 182 uppsatser innehållade orden Reactive power.

  1. 1. Local voltage control in a low voltage grid with high photovoltaic penetration

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för reglerteknik

    Författare :Joakim Bakklund; [2024]
    Nyckelord :Technology and Engineering;

    Sammanfattning : This thesis examines how active power control (Volt-Watt control) and reactive power compensation (Volt-VAr control) can help limit voltage increases on the low voltage grid due to high photovoltaic (PV), installations. Due to the large increase in interest to install small scale PV-systems within residential areas the Distribution System Operator E. LÄS MER

  3. 2. SeqLTL and ωLTL

    Master-uppsats, Göteborgs universitet/Institutionen för data- och informationsteknik

    Författare :Oskar Grekula; [2023-10-19]
    Nyckelord :Linear Temporal Logic; Co-safety LTL; Tight Witness; Compositional;

    Sammanfattning : Linear Temporal Logic (LTL) is worthwhile for its applications in, among others, model checking, runtime verification and reactive synthesis. However, many useful properties are not expressible in LTL, or not in a natural way. LÄS MER

  4. 3. Mitigation of supply chain uncertainties caused by material shortage : A case study with Loccioni

    Master-uppsats, Uppsala universitet/Institutionen för samhällsbyggnad och industriell teknik

    Författare :Juliane Wloch; [2023]
    Nyckelord :Supply chain risk management; supply disruption management; semiconductor shortage; Small- and Medium-sized Enterprises;

    Sammanfattning : The ongoing semiconductor shortage impacts organizations throughout the supply chain operationally and financially. Limited material for a sudden increase in demand during the Covid-19 pandemic led to a heightened supplier power and result in the prioritization of customers. LÄS MER

  5. 4. Parallel Operation of Grid-Forming Power Inverters

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

    Författare :Alessia Camboni; [2023]
    Nyckelord :;

    Sammanfattning : The use of renewable energy sources has been increasing during the last few years, both to obtain a less impacting energy production, and because of the limited fossil resources. Renewable sources are connected to the grid using inverters, which can be controlled in two main modes, grid-following, and grid-forming. LÄS MER

  7. 5. Centralised MPC for Long-term Voltage Stability Control of Power System

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

    Författare :Johan Hallberg; [2023]
    Nyckelord :Voltage stability; Model predictive control; Tap-changing transformer; Capacitor bank; Spänningsstabilitet; Model prediktiv reglering; Lindningskopplare; Kondensatorbank;

    Sammanfattning : In a power system it is important to keep voltages at specific levels at network buses. Deviations from that can lead to reduced efficiency of transferred power or, in more severe cases, widespread power outages affecting large parts of society. There exists a variety of power system devices that have the ability to regulate the voltage levels. LÄS MER