Search for dissertations about: "Effektelektronik"

Showing result 11 - 15 of 32 swedish dissertations containing the word Effektelektronik.

  2. 11. Modelling and control of a line-commutated HVDC transmission system interacting with a VSC STATCOM

    Author : Paulo Fischer de Toledo; Hans-Peter Nee; Gustaf Ohlsson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Keywords : HVDC transmission; LCC – Line-commutated Current-source Converter; STATCOM; VSC – Voltage Source Converter; Space-Vector complex vector ; transfer-function; frequency-domain analysis; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Abstract : The interaction of an HVDC converter with the connected power system is of complex nature. An accurate model of the converter is required to study these interactions. The use of analytical small-signal converter models provides useful insight and understanding of the interaction of the HVDC system and the connected system components. READ MORE

  4. 12. Investigation of AC electrical machine stators with fractional conductor windings

    Author : Henrik Grop; Juliette Soulard; Yujing Liu; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; windings; leakage; large machines; induction motor construction; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Abstract : Industry always searches the least expensive solution for a machine design. Therefore, there is a need for integrating different customer ordered machines within the same frame, while keeping the foundation of the mechanical design constant. READ MORE

  5. 13. Aspects on Dynamic Power Flow Controllers and Related Devices for Increased Flexibility in Electric Power Systems

    Author : Nicklas Johansson; Hans-Peter Nee; Göran Andersson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Adaptive Control; Controlled Series Compensator; Dynamic Power Flow Controller; Frequency Scanning; Phase-Shifting Transformer; Power Controller Plane; Power Flow Control; Power Oscillation Damping; Subsynchronous Resonance; Thyristor Controlled Series Compensator; Thyristor Switched Series Compensator; Transient Stability; Electrical engineering; Elektroteknik;

    Abstract : This thesis studies different aspects of Flexible AC Transmission System (FACTS) devices which are used to improve the power transfer capability and increase the controllability in electric power systems. In the thesis, different aspects on the usage and control of Dynamic Power Flow Controllers (DPFC) and related FACTS devices are studied. READ MORE

  6. 14. Control of Dynamically Assisted Phase-shifting Transformers

    Author : Nicklas Johansson; Hans-Peter Nee; Olof Samuelsson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thyristor Controlled Series Capacitor; Thyristor Switched Series Capacitor; Controlled Series Compensator; Dynamic Power Flow Controller; Phase-Shifting Transformer; Power Oscillation Damping; Transient Stability; Power Flow Control; Adaptive Control; Electric power engineering; Elkraftteknik;

    Abstract : In this thesis, controllers for power oscillation damping, transient stability improvement and power flow control by means of a Controlled Series Compensator (CSC) and and a Dynamic Power Flow Controller (DPFC) are proposed. These devices belong to the group of power system components referred to as Flexible AC Transmission System (FACTS) devices. READ MORE

  7. 15. On Design of a Compact Primary Switched Conversion System for Electric Railway Propulsion

    Author : Tommy Kjellqvist; Stefan Östlund; Alfred Rufer; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Isolated AC DC converter; Mutual commutation; Soft Switching; Cyclo converter; Medium-Frequency Transformer; Electric Railway Propulsion; Electrical engineering; Elektroteknik;

    Abstract : In this thesis, a compact and light primary switched conversion system for AC-fed railway propulsion is investigated. It is characterized by soft switching of all converter stages and a source commutated primary converter comprising series connected valves. READ MORE