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Showing result 1 - 5 of 78 essays matching the above criteria.

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

    University essay from Lunds universitet/Institutionen för reglerteknik

    Author : Joakim Bakklund; [2024]
    Keywords : Technology and Engineering;

    Abstract : 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. READ MORE

  3. 2. Vibroacoustic Analysis of an OLTC Diverter Switch for Condition Monitoring : Time frequency analysis with Fourier and wavelet transform in combination with multivariate logistic regression for condition monitoring of OLTC diverter switch

    University essay from Uppsala universitet/Avdelningen för systemteknik

    Author : Simon Persson; [2023]
    Keywords : Wavelet transform; CWT; logistic regression; machine learning; ML; vibroacoustic analysis; time frequency analysis; tap changer; diverter switch; power transformer; classification; prediction; condition; vibrations; state prediction; Hitachi Energy;

    Abstract : Vibrations are everywhere around us all the time and we often recognise them as sounds that we can hear and analyse with our brain. In this thesis, data that has been gathered from a diverter switch (DS) in a controlled environment, is analysed. READ MORE

  4. 3. Centralised MPC for Long-term Voltage Stability Control of Power System

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

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

    Abstract : 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. READ MORE

  5. 4. AI-POWERED TEXT ANALYSIS TOOL FOR SENTIMENT ANALYSIS

    University essay from Mälardalens universitet/Akademin för innovation, design och teknik

    Author : Dani Kebede; Naod Tesfai; [2023]
    Keywords : Sentiment analysis; Artificial intelligence; NLP; RoBERTa;

    Abstract : In today’s digital era, text data plays a ubiquitous role across various domains. This bachelor thesis focuses on the field of sentiment analysis, specifically addressing the task of classifying text into positive, negative, or neutral sentiments with the help of an AI tool. READ MORE

  6. 5. Evaluation of Ferroelectric Tunnel Junction memristor for in-memory computation in real world use cases

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

    Author : Alec Guerin; Christos Papadopoulos; [2023]
    Keywords : FTJ; Ferroelectric Tunneling Junction; Analog in-memory computing; AIMC; Memristor; A.I.; AIHWKIT; Semantic segmentation; Natural Language Processing; NLP; Neuromorphic Computing; Matrix Vector Multiplication; Technology and Engineering;

    Abstract : Machine learning algorithms are experiencing unprecedented attention, but their inherent computational complexity leads to high energy consumption. However, a paradigm shift in computing methods has the potential to address the issue. READ MORE