Invention Grant
- Patent Title: Controlled inrush current for converter-connected grid filter
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Application No.: US15572256Application Date: 2016-06-08
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Publication No.: US10590914B2Publication Date: 2020-03-17
- Inventor: Tusitha Abeyasekera , Duy Duc Doan , Gert Karmisholt Andersen , Lars Helle , Søren Andersen , Tune Pedersen , John Godsk Nielsen
- Applicant: VESTAS WIND SYSTEMS A/S
- Applicant Address: DK Aarhus N
- Assignee: VESTAS WIND SYSTEMS A/S
- Current Assignee: VESTAS WIND SYSTEMS A/S
- Current Assignee Address: DK Aarhus N
- Agency: Patterson + Sheridan, LLP
- Priority: DK201570390 20150624
- International Application: PCT/DK2016/050170 WO 20160608
- International Announcement: WO2016/206688 WO 20161229
- Main IPC: H03K17/945
- IPC: H03K17/945 ; H03K17/955 ; F03D7/02 ; H02J3/38 ; H02J3/42 ; H02H7/26 ; F03D9/25 ; H02H9/00 ; H02H7/085

Abstract:
A method, converter arrangement, and controller are disclosed for connecting an output of a converter with an electrical grid to control inrush currents into a grid filter assembly connected with the output of the converter, the electrical grid carrying an alternating current (AC) signal having one or more phases. The method includes determining a voltage of the AC signal and operating, after pre-charging a direct current (DC) link of the converter to a predetermined voltage, the converter using open-loop voltage control to produce an AC output signal that substantially matches the AC signal of the electrical grid. The open-loop voltage control is based on the determined voltage of the AC signal. The method further includes closing, after a predetermined amount of time of operating the converter using the open-loop voltage control, a switching device to thereby connect the output of the converter with the electrical grid.
Public/Granted literature
- US20180112647A1 CONTROLLED INRUSH CURRENT FOR CONVERTER-CONNECTED GRID FILTER Public/Granted day:2018-04-26
Information query
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