Search for dissertations about: "current voltage"

Showing result 1 - 5 of 621 swedish dissertations containing the words current voltage.

  2. 1. Towards Low-Voltage, High-Current : A pioneering drive concept for battery electric vehicles

    Author : Stefan Haller; Kent Bertilsson; Bengt Oelmann; Peng Cheng; Dieter Gerling; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; low voltage; high current; EV; BEV; electrical machine; power electronics; MOSFET;

    Abstract : The first electric low-voltage vehicles were constructed in the mid-19th century, but by the early 20th century they were progressively replacedby successors with internal combustion engines. As the consequences ofusing fossil fuels are better understood, our society is now transitioning back. READ MORE

  4. 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 tekniska högskola; []
    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

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

    Author : Magnus Gustafsson; Niclas Krantz; Chalmers tekniska högskola; []
    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

  6. 4. A precision wattmeter for non-sinusoidal conditions : based on an analysis of common measuring problems due to harmonics

    Author : Stefan Svensson; RISE; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sampling; wattmeter; non-sinusoidal; power; current; voltage; harmonics;

    Abstract : .... READ MORE

  7. 5. Long-term Voltage Stability in Power Systems - Alleviating the Impact of Generator Current Limiters

    Author : Stefan Johansson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rotor thermal overloading; dynamic load modelling; voltage stability; field current limiter; active power rescheduling; overexcitation limiter; armature current limiter; long-term power system dynamic stability;

    Abstract : The main issues in this dissertation are the behaviour of current limiters protecting synchronous generators, and the interactions that occur with other components in the power system during a voltage instability. The importance of these limiters for the voltage stability is shown both in the analysis of small models and in the simulations of larger networks. READ MORE