Sökning: "transmission line parameter estimation"

Hittade 5 uppsatser innehållade orden transmission line parameter estimation.

  1. 1. Line Distance Protection in Power Grids with Variable Renewable Energy Sources : An Investigation on Time Domain Distance Protection via Parameter Estimation

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

    Författare :Ludvig Ringaby; [2023]
    Nyckelord :Distance protection; Power system protection; Time domain distance protection; Differential Equation Algorithm; Variable renewable energy; IBR; Distansskydd; Skyddssystem i elkraftsystem; Tidsdomän distansskydd; Differentialekvationsalgoritm; Variabel förnybar energi;

    Sammanfattning : Variable renewable energy sources typically connect to the power grid through power electronic interfaces. Increased use of such sources can cause issues for conventional distance protection. LÄS MER

  3. 2. An evaluation of LoRa transmission parameter selection for indoor positioning

    Kandidat-uppsats, Jönköping University/JTH, Avdelningen för datateknik och informatik

    Författare :Adina Valjakka; Anton Ahlinder; [2022]
    Nyckelord :Accuracy; Indoor positioning; LoRa; NLOS; Precision; RSSI; Transmission parameters; Trilateration;

    Sammanfattning : The purpose of this thesis is to investigate how the LoRa modulation configuration affects precision and accuracy when using LoRa for indoor positioning in non-line-of-sight conditions. The aim is to research if an optimum combination of spreading factor, bandwidth, and code rate factor can be found to result in the best possible positioning accuracy and precision, under certain predefined conditions. LÄS MER

  4. 3. Open Source Model of the Nordic Power System for EU Project Spine

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

    Författare :Aravind Satheeskumar; [2020]
    Nyckelord :Nordic Power System; power system modelling; power flow analysis; optimisation; transmission line parameter estimation; Nordic Power System; modellering av kraftsystem; effektflödesanalys; optimering; uppskattning av transmissionslinje-parametrar;

    Sammanfattning : Decision problems in operation and planning of power systems often rely on large-scale models and data sets. Lack of historical power flow data due to regulatory restrictions often limits researchers to study the system with aggregated network models. LÄS MER

  5. 4. Calibration and Estimation of Dog Teeth Positions in Synchronizers for Minimizing Noise and Wear during Gear Shifting

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Qianyin Kong; [2020]
    Nyckelord :Synchronizer engagement; gear shifting; dog teeth; particle swarm optimization; Synkroniserare; Växling; Dog-teeth; Partikelsvärmoptimering;

    Sammanfattning : Electric motors are used more widely in automotive to reducing emissions in vehicles. Due to the decreased usage of internal combustion engines which used to be the main noise source, impacts from synchronizers cannot be ignored during gear shifting, not only causing noise and wear but also delaying gear shifting completion. LÄS MER

  7. 5. Measurement Based Vehicle-to-Vehicle Multi-link Channel Modeling and Relaying Performance

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Xi Chen; [2015]
    Nyckelord :V2V; wireless; channel model; multilink; relaying; sum of sinusoids; correlated Gaussian; maximum likelihood estimation; Technology and Engineering;

    Sammanfattning : There has been intense research in vehicular communication in order to provide reliable low-latency vehicular communication links for developing intelligent transportation system (ITS). As one of the important properties, vehicle-to-vehicle (V2V) communication is learned to be inherently non-stationary due to the high mobility of both transmitter (TX) and receiver (RX). LÄS MER