Sökning: "subsynchronous resonance"

Hittade 5 avhandlingar innehållade orden subsynchronous resonance.

1. 1. Subsynchronous Resonance in Doubly Fed Induction Generator based Wind farms

   Författare :Selam Chernet; Chalmers tekniska högskola; []
   Nyckelord :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 ;

   Sammanfattning : 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. LÄS MER

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

   Författare :Selam Chernet; Chalmers tekniska högskola; []
   Nyckelord :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 ;

   Sammanfattning : 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. LÄS MER

4. 3. On Control of Grid-connected Voltage Source Converters - Mitigation of Voltage Dips and Subsynchronous Resonances

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

   Sammanfattning : 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. LÄS MER

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

   Författare :Nicklas Johansson; Hans-Peter Nee; Göran Andersson; KTH; []
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER

7. 5. Synchronous Voltage Reversal Control of Thyristor Controlled Series Capacitor

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

   Sammanfattning : 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. LÄS MER