Search for dissertations about: "SSR"

Showing result 1 - 5 of 31 swedish dissertations containing the word SSR.

  2. 1. 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. 2. On Control of Grid-connected Voltage Source Converters - Mitigation of Voltage Dips and Subsynchronous Resonances

    Author : Massimo Bongiorno; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Power Electronics; Voltage Source Converter VSC ; Power Quality; Current Controller; Voltage Dip Sag ; Subsynchronous Resonance SSR .;

    Abstract : Custom Power and Flexible AC Transmission Systems (FACTS) denote the application of power electronics in distribution and transmission networks, respectively. Custom Power is the application of power electronics to improve the quality of power distribution for sensitive industrial plants. READ MORE

  5. 3. Subsynchronous Resonance in Doubly-Fed Induction Generator Based Wind Farms

    Author : Selam Chernet; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Induction Generator Effect IGE ; Doubly-Fed Induction Generator DFIG ; SubSynchronous Resonance SSR ; passivity.; Wind power; impedance-based analysis; SubSynchronous Controller Interaction SSCI ;

    Abstract : The objective of this thesis is to investigate the risk for instabilities due to SubSynchronousResonances (SSR) conditions in large wind farms connected to series-compensated transmissionlines. In particular, the focus is on Doubly-Fed Induction Generator (DFIG) based windfarms. READ MORE

  6. 4. Subsynchronous Resonance in Doubly Fed Induction Generator based Wind farms

    Author : Selam Chernet; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; generalized Nyquist criterion GNC .; Passivity; doubly-fed induction generator DFIG ; subsynchronous controller interaction SSCI ; Wind power; Impedance-based analysis; induction generator effect IGE ; subsynchronous resonance SSR ;

    Abstract : The objective of this thesis is to investigate the risk for instabilities due to subsynchronous resonance (SSR) conditions in large wind farms connected to series-compensated transmission lines. In particular, the focus is on doubly-fed induction generator (DFIG) based wind farms. READ MORE

  7. 5. A reason to be bitter : cassava classification from the farmers' perspective

    Author : Linley Chiwona-Karltun; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Cassava; bitter; sweet; cyanogenic glucosides; cyanide; sensory analysis; taste; theft; women; food security; SSR-markers; molecular genetics; plant morphology; Malawi; Africa;

    Abstract : Ethnographers report from both South America and Africa that cassava farmers classify cultivars as belonging to either of two groups, "bitter" or "sweet", and that farmers prefer to grow "bitter" cultivars as the staple crop. It remains contentious if the two groups and whether bitterness in taste reflects the content of cyanogenic glucosides in cassava roots. READ MORE