Search for dissertations about: "voltage instability"

Showing result 1 - 5 of 37 swedish dissertations containing the words voltage instability.

  1. 1. Voltage collapse in power systems : analysis of component related phenomena using a power system model

    Author : Magnus Gustafsson; Niclas Krantz; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; power system model; armature current limiter; reactive power; voltage collapse; OLTC; dynamic load; active power; field current limiter; voltage stability; load modelling; on-load tap changer; voltage instability; induction motor load;

    Abstract : .... READ MORE

  2. 2. Voltage collapse in power systems : the influence of generator current limiters, on-load tap changers and load dynamics

    Author : Stefan Johansson; Fredrik Sjögren; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; voltage collapse; field current limiter; current-voltage trajectory; armature current limiter; load dunamics; voltage instability;

    Abstract : .... READ MORE

  3. 3. Data-driven methods for real-time voltage stability assessment

    Author : Hannes Hagmar; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; security assessment; neural networks; Dynamic voltage security margin; machine learning; voltage instability prediction; voltage stability;

    Abstract : Voltage instability is a phenomenon that limits the operation and the transmission capacity of a power system. An operation state close to the security limits enables a cost-effective utilization of the system but it could also make the system more vulnerable to disturbances. READ MORE

  4. 4. Protection Strategies to Mitigate Major Power Systems Breakdowns

    Author : Mattias Jonsson; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; system protection schemes; transient instability; distance protection; power swing detectors; voltage instability; generator coherency; wide area protection; out-of-step protection;

    Abstract : This thesis deals with new methods to improve the performance of power system protection in the case of voltage- and transient instability. These methods are designed primarily to mitigate power system breakdown. Relay algorithms are proposed where conventional distance protection is combined with additional relay criteria. READ MORE

  5. 5. Operation and control of HVDC links embedded in AC systems

    Author : Jenny Paulinder; Chalmers University of Technology; []
    Keywords : load voltage dependency; system overload; AC DC interaction; HVDC; voltage instability; control of hvdc converters;

    Abstract : .... READ MORE