Protection system of a doubly-fed induction machine
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United States of America Patent
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Feb 12, 2013
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N/A
app pub date -
Apr 20, 2011
filing date -
Oct 20, 2008
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Abstract
A protection system for a doubly-fed induction machine; with a stator and a rotor. The stator of the doubly-fed induction machine is connected to a grid, and the rotor of the doubly-fed induction machine is connected to the grid via a converter. The converter includes a machine side converter, and a DC-link and a line side converter. The protection system also includes at least one crowbar, the crowbar being connected to the rotor, at least one DC-chopper provided in the DC-link, a converter controller, and a separate protection device for DC-chopper and the at least one crowbar.
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