Browsing Institutt for elkraftteknikk by Author "Wiik, Jan Arild"
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A Solution for Low Voltage Ride Through of Induction Generators in Wind Farms using Magnetic Energy Recovery Switch
Fønstelien, Olav Jakob (Master thesis, 2009)Induction generators constitute 30 percent of today’s installed wind power. They are very sensitive to grid voltage disturbances and need retrofitting to enhance their low voltage ride through (LVRT) capability. LVRT of ... -
Control of Offshore Passive Platform System Voltage and Frequency through Control of Onshore Back-to-Back Voltage Source Converters
Høvik, Kristin Malene (Master thesis, 2011)This thesis work shows implementation and testing of existing control strategies in a novel offshore passive platform configuration. Control of the platform voltage and frequency is done through control of a shore-based ... -
Monitoring of load torque variations by using an Electrical Drive with Direct Torque Control
Aarskog, Fredrik Gundersen (Master thesis, 2011)This work analyses the accuracy of the estimated mechanical speed and electromagnetic torque in a Direct Torque Controlled (DTC) induction motor drive with no speed measurement. A literature study has been performed in ...