Wind turbine with an on-load tap changer configured with dynamic fault current injection
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United States of America Patent
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Feb 9, 2021
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N/A
app pub date -
Jul 5, 2019
filing date -
Jul 4, 2018
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Abstract
The invention relates to a method for controlling a wind turbine configured with an on load tap changer transformer which enables adjustment of a current ratio of a primary side current of the transformer and a secondary side current of the transformer. The method comprises detecting that a network voltage on the primary side or secondary side of the transformer is outside a pre-determined voltage range, and in response determining a current reference for the primary side current based on the detected network voltage. The power converter of the wind turbine is controlled to generate an increase of the primary side current towards the current reference, and the current ratio of the transformer is adjusted towards a higher ratio of the current ratio.
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