Search for dissertations about: "dynamic load for power system"

Showing result 1 - 5 of 52 swedish dissertations containing the words dynamic load for power system.

  1. 1. Dynamic Power System Load -Estimation of Parameters from Operational Data

    University dissertation from Department of Industrial Electrical Engineering and Automation, Lund Institute of Technology

    Author : Ines Romero; Lunds universitet.; Lund University.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; control engineering; robotics; Automation; large disturbances; Load modeling; normal operation; voltage stability; dynamic load models; modeling and identification; normalization in reactive load models; Elektronik och elektroteknik; Electronics and Electrical technology; Automatiska system; robotteknik; reglerteknik; Electrical engineering; Elektroteknik;

    Abstract : The significance of load modeling for voltage stability studies has been emphasized by several disturbances, which have taken place in the past years. They have shown that the loads in combination with other dynamics are among the main contributors of prolonged low voltage conditions, voltage instability and collapse in the power system. READ MORE

  2. 2. Dynamic Load Models for Power Systems - Estimation of Time-Varying Parameters During Normal Operation

    University dissertation from Department of Industrial Electrical Engineering and Automation, Lund Institute of Technology

    Author : Ines Romero; Lunds universitet.; Lund University.; [2002]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; voltage stability; Load modeling; modeling and identification; dynamic load models; normalization in reactive load models;

    Abstract : Economic and environmental concerns will slow down the expansion of the transmission system in many countries. The addition of new transmission lines will be few and far between. The de-regulation of the power supply will introduce new power flow patterns on the bulk transmission systems. READ MORE

  3. 3. Fluid Power Systems for Mobile Applications with a Focus on Energy Efficiency and Dynamic Characteristics

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Mikael Axin; Linköpings universitet.; Linköpings universitet.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : This thesis studies an innovative working hydraulic system design for mobile applications. The purpose is to improve the energy efficiency and the dynamic characteristics compared to load sensing systems without increasing the complexity or adding additional components.The system analysed in this thesis is referred to as flow control. READ MORE

  4. 4. DC Distributed Power Systems - Analysis, Design and Control for a Renewable Energy System

    University dissertation from IEA-LTH, Box 118, SE-221 00 LUND, SWEDEN

    Author : Per Karlsson; Lunds universitet.; Lund University.; [2002]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energiforskning; fault detection; load sharing; wind power; DC distributed power system; voltage control; Energy research; Elektronik och elektroteknik; VSC; Electronics and Electrical technology;

    Abstract : Renewable energy systems are likely to become wide spread in the future due to environmental demands. As a consequence of the dispersed nature of renewable energy systems, this implies that there will be a distributed generation of electric power. READ MORE

  5. 5. High efficiency power amplifiers for wireless communications

    University dissertation from IEA-LTH, Box 118, SE-221 00 LUND, SWEDEN

    Author : Hossein Mashad Nemati; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; supply modulation; Power amplifier; LDMOS; transmitter architecture; efficiency; GaN; MMIC; load modulation; mHEMT;

    Abstract : This thesis presents state-of-the-art high efficiencyharmonically-tuned power amplifiers (PAs) and investigates thecharacteristics and potentials of such amplifiers in two of the mostpromising efficiency enhancement techniques, dynamic supply and load modulation.In this work, a 10 W LDMOS harmonically-tuned PA with 80% power-added-efficiency (PAE) isrealized at 1 GHz. READ MORE