公开(公告)号：EP3853991A1

公开(公告)日：2021-07-28

申请号：EP19769712.1

申请日：2019-09-11

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： BIRIS, Ciprian ,  TANGE, Kent ,  ANDERSEN, Gert Karmisholt ,  DOAN, Duy Duc ,  LUND, Torsten ,  MEYER, Lars

IPC: H02M7/5395 ,  H02M7/5387

公开(公告)号：EP3780366A1

公开(公告)日：2021-02-17

申请号：EP20190429.9

申请日：2020-08-11

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： BIRIS, Ciprian ,  GERÇEK, Cem Özgür ,  HELLE, Lars ,  DOAN, Duy Duc ,  PEDERSEN, Tune

IPC: H02M1/32

Abstract: This disclosure proposes a topology that integrates a DC chopper into the Modular Multilevel Converter (MMC) cells of a power converter. The integrated DC chopper may include chopper resistors that may also be advantageously integrated into a heat sink for a power module comprising at least the power transistors of the MMC cell. Embodiments herein also describe a method for using an MMC cell's IGBTs and chopper resistors for providing a safe discharge of both cell capacitors and DC-link capacitors in different operating conditions.

公开(公告)号：EP3314715B1

公开(公告)日：2019-11-06

申请号：EP16728612.9

申请日：2016-06-08

Applicant: Vestas Wind Systems A/S

Inventor： ABEYASEKERA, Tusitha ,  DOAN, Duy Duc ,  ANDERSEN, Gert Karmisholt ,  HELLE, Lars ,  PEDERSEN, Tune ,  NIELSEN, John Godsk ,  ANDERSEN, Søren

IPC: H02J3/38 ,  F03D9/00 ,  H02J3/42 ,  H02H9/00 ,  H02H7/26 ,  F03D9/25

公开(公告)号：EP3512065A1

公开(公告)日：2019-07-17

申请号：EP19150387.9

申请日：2019-01-04

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： BIRIS, Ciprian ,  TANGE, Kent ,  DOAN, Duy Duc ,  LUND, Torsten ,  ANDERSEN, Gert Karmisholt

IPC: H02J3/38 ,  H02M7/5395 ,  H02J3/18 ,  H02M1/08

Abstract: The invention relates to a method for operating a wind turbine. The method comprises monitoring a wind turbine signal for detection of an over voltage of the grid and upon detection of the over voltage, initiate an over-modulation mode wherein the grid side converter is operated with a modulation index being increased in an over-modulation range at least during a sub-period of the over-modulation mode, and upon the detection of the operational condition, initiate a DC-voltage adjustment mode wherein the DC voltage of the DC link is decreased from a second voltage level towards a first voltage level at least during a sub-period of the DC-voltage adjustment mode.

公开(公告)号：EP3504786A1

公开(公告)日：2019-07-03

申请号：EP17754253.7

申请日：2017-08-11

Applicant: Vestas Wind Systems A/S

Inventor： ANDERSEN, Gert Karmisholt ,  TANGE, Kent ,  ANDERSEN, Søren ,  DOAN, Duy Duc ,  BILTOFT, Jens Peter ,  HELLE, Lars ,  NIELSEN, John Godsk

IPC: H02P9/02 ,  H02M5/44

公开(公告)号：EP3284151A1

公开(公告)日：2018-02-21

申请号：EP16716821.0

申请日：2016-04-11

Applicant: Vestas Wind Systems A/S

Inventor： NIELSEN, John Godsk ,  ANDERSEN, Søren ,  HELLE, Lars ,  DOAN, Duy Duc

IPC: H02J1/10 ,  H02J3/38

CPC classification number: H02J3/34 ,  H02J3/36 ,  H02J3/386 ,  H02M5/42 ,  H02M2001/325 ,  Y02E10/763 ,  Y02E60/60

Abstract: In a full-scale converter system both the grid-side inverter unit and the generator-side inverter unit have a series convection of parallel inverters and form a generator-side and grid-side voltage-center-point at a voltage level between those of the inverters connected in series. The voltage-center-points are electrically connected by a center-line conductor that has a cross-section between 30% and 70% of that of a positive or negative potential conductor. The converter system continues conversion operation in the event of a fault in an inverter of a first converter-string, with non-faulty inverters of the converter system, as the center-line conductor is dimensioned by said cross-section to carry a compensation current resulting from an unbalanced active power-output.

公开(公告)号：EP3729632A1

公开(公告)日：2020-10-28

申请号：EP18821694.9

申请日：2018-12-06

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： BIRIS, Ciprian ,  TANGE, Kent ,  DOAN, Duy Duc ,  LUND, Torsten ,  ANDERSEN, Gert Karmisholt

IPC: H02M7/5395 ,  H02M5/458 ,  H02P27/08 ,  F03D7/02 ,  H02J3/38 ,  H02P9/10 ,  G01R31/02

公开(公告)号：EP2788619B1

公开(公告)日：2020-04-15

申请号：EP12812514.3

申请日：2012-12-07

Applicant: Vestas Wind Systems A/S

Inventor： DOAN, Duy Duc

IPC: F03D7/02 ,  H02P9/08 ,  H02P3/18 ,  F03D9/25

公开(公告)号：EP3563477A1

公开(公告)日：2019-11-06

申请号：EP17808765.6

申请日：2017-11-29

Applicant: Vestas Wind Systems A/S

Inventor： BIRIS, Ciprian ,  DOAN, Duy Duc ,  NIELSEN, John Godsk

IPC: H02M7/483 ,  H02J3/38 ,  H02M1/00

公开(公告)号：EP3245528A1

公开(公告)日：2017-11-22

申请号：EP16701568.4

申请日：2016-01-06

Applicant: Vestas Wind Systems A/S

Inventor： ANDERSEN, Søren ,  NIELSEN, John Godsk ,  DOAN, Duy Duc

IPC: G01R31/08 ,  F03D7/02 ,  F03D7/04 ,  H02J3/36 ,  H02J3/38 ,  H02J3/40 ,  G01R31/34 ,  F03D9/00

CPC classification number: H02P9/006 ,  F03D7/0264 ,  F03D7/0284 ,  F03D7/04 ,  F03D9/255 ,  G01R27/16 ,  G01R31/343 ,  G01R31/40 ,  G01R31/42 ,  H02J3/36 ,  H02J3/386 ,  H02K7/1838 ,  H02M5/4585 ,  H02P2101/15 ,  H02P2201/03 ,  Y02E10/723 ,  Y02E10/763 ,  Y02E60/60

Abstract: A method of monitoring a split wind-turbine-converter system with at least one generator-side converter and at least one grid-side converter arranged at distant locations, and a DC-link in the form of an elongated conductor arrangement with at least one positive and at least one negative conductor. The impedance of the DC-link conductor arrangement is determined by means of DC-voltage sensors. The voltages between the positive and the negative conductors are determined at the generator-side converter and at the grid-side converter, and the difference between the voltages is determined. The impedance of the DC-link conductor arrangement is determined by putting the determined voltage difference in relation to the DC current flowing through the DC-link conductor arrangement. If the impedance exceeds a given impedance threshold a fault state is recognized.