HVDC rectifier protection using estimated and measured power
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United States of America Patent
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Jan 30, 2018
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app pub date -
Nov 23, 2016
filing date -
Nov 27, 2015
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Abstract
An HVDC power increase controller includes a command output unit for outputting a current command value according to a disturbance signal to a main controller; a voltage drop determiner receiving an alternating current (AC) voltage and comparing a level of the AC voltage to a lowest level of a voltage causing a rectification failure; and a power tracking determiner receiving a direct current (DC) power and comparing a level of the DC power to an estimated power level corresponding to the current command value. The command output unit adjusts the current command value according to a comparison result of the voltage drop determiner and the power tracking determiner.
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