Search for dissertations about: "reactive power control"

Showing result 11 - 15 of 69 swedish dissertations containing the words reactive power control.

  2. 11. Synchronous Voltage Reversal Control of Thyristor Controlled Series Capacitor

    Author : Lennart Ängquist; KTH; []
    Keywords : ThyristorControlled Series Capacitor; TCSC; FACTS; reactive power compensation; boost control; phasor estimation; Quantitative Feedback Theory; subsynchronous resonance; SSR;

    Abstract : Series compensation of transmission lines is an effectiveand cheap method of improving the power transmission systemperformance. Series capacitors virtually reduces the length ofthe line making it easier to keep all parts of the power systemrunning in synchronism and to maintain a constant voltage levelthroughout the system. READ MORE

  4. 12. On Some Aspects of Design of Electric Power Ancillary Service Markets

    Author : Jin Zhong; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spinning reserve; deregulation; electricity market; reactive power; frequency regulation and optimal power flow; ancillary services;

    Abstract : Ancillary services are defined as all those activities on the interconnected grid that are necessary to support the transmission of power while maintaining reliable operation and ensuring the required degree of quality and safety. There are several activities of the operator that come under the preview of ancillary services. READ MORE

  5. 13. Planning and Operation of Large Amounts of Wind Power in a Distribution System

    Author : Shemsedin Nursebo; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cost benefit analysis; coordination.; distribution system; active management strategies; control; integration issues of wind power; frequency of tap change;

    Abstract : The global installed capacity of wind power has shown a significant growth, from 24 GW in 2001 to 370 GW in 2014. The trend shows that an increasing capacity of wind power is being connected to the electric power system. READ MORE

  6. 14. Control of Voltage and Damping in Bulk Power Systems

    Author : Mohammad Reza Safari Tirtashi; Industriell elektroteknik och automation; []
    Keywords : Voltage control; Damping control; Power system dynamics;

    Abstract : Modern power system is a complex dynamical system and one of the largest man-made systems. With recent driving forces like environmental concerns over air emissions, the modern power system is evolving towards an even more complex system. READ MORE

  7. 15. A Multichoice Control Strategy for a VSC-HVdc

    Author : Hector F. Latorre; Mehrdad Ghandhari; Lennart Söder; Kjetil Uhlen; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Control Lyapunov Function; Modal Analysis; Power Oscillation Damping; Transient Stability; Voltage Stability; VSC-HVdc; Electrical engineering; Elektroteknik;

    Abstract : Utilization of power electronics based controllable systems (or devices) in transmission systems has opened new opportunities for the power industry to optimize utilization of the existing transmission systems, and at the same time to keep high system reliability and security. As a member of these controllable systems, Voltage Source Converters-based High Voltage direct current (VSC-HVdc) systems have the ability to rapidly control the transmitted active power, and also to independently exchange reactive power with transmissions systems. READ MORE