POWER CONVERSION DEVICE AND CONTROL METHOD THEREOF
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United States of America Patent
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Issued Date -
Oct 3, 2024
app pub date -
May 8, 2024
filing date -
Mar 30, 2023
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Abstract
Examples of power conversion devices and control methods are described. In one example, a power conversion device includes direct current buses, an inverter circuit, and a controller. After the power conversion device switches from a high voltage ride through state to a low voltage ride through state, the controller controls a change rate of an output active current of the inverter circuit to be a first change rate in a first time interval and a second change rate in a second time interval respectively in a low voltage ride through reactive current response process. The second change rate is greater than the first change rate. A sum of first interval duration of the first time interval and second interval duration of the second time interval is less than or equal to a low voltage ride through reactive current response duration threshold.
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