公开(公告)号：US11563385B2

公开(公告)日：2023-01-24

申请号：US17562731

申请日：2021-12-27

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Ciprian Biris ,  Cem Özgür Gerçek ,  Lars Helle ,  Duy Duc Doan ,  Tune Pedersen

IPC: H02M7/483 ,  H02M1/32 ,  F03D7/04 ,  H02J3/38 ,  H02M5/458

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 including 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：US11211878B2

公开(公告)日：2021-12-28

申请号：US16992051

申请日：2020-08-12

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Ciprian Biris ,  Cem Özgür Gerçek ,  Lars Helle ,  Duy Duc Doan ,  Tune Pedersen

IPC: H02M7/483 ,  F03D7/04 ,  H02J3/38 ,  H02M1/32 ,  H02M5/458

Abstract: A Direct Current (DC) chopper may be integrated 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 including at least the power transistors of the MMC cell. The safe discharge of both cell capacitors and DC-link capacitors in different operating conditions is performed using Insulated-Gate Bipolar Transistors (IGBTs) and chopper resistors of an MMC cell.

公开(公告)号：US10590914B2

公开(公告)日：2020-03-17

申请号：US15572256

申请日：2016-06-08

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Tusitha Abeyasekera ,  Duy Duc Doan ,  Gert Karmisholt Andersen ,  Lars Helle ,  Søren Andersen ,  Tune Pedersen ,  John Godsk Nielsen

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.

公开(公告)号：US09500181B2

公开(公告)日：2016-11-22

申请号：US14755103

申请日：2015-06-30

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Tune Pedersen

IPC: F03D7/00 ,  F03D7/04 ,  F03D7/02 ,  F03D9/00

CPC classification number: F03D7/042 ,  F03D7/0224 ,  F03D7/0284 ,  F03D7/048 ,  F03D9/257 ,  F05B2270/1033 ,  F05B2270/337 ,  Y02E10/723

Abstract: Controlling operation of a wind turbine coupled to a power grid is disclosed. The power grid is monitored in order to determine whether or not there is a match between a demand for energy defined by power consumers connected to the power grid and supply of energy from power producers connected to the power grid. For instance, the price of energy may be monitored. In the case that the supply of energy from power producers exceeds the demand for energy, and a deficiency between the demand for energy and the supply of energy exceeds a first threshold value, the energy flow through the generator is reversed, thereby causing the generator to consume power received from the power grid. Thereby the deficiency can be reduced and the power grid can be stabilised.

Abstract translation: 公开了耦合到电网的风力涡轮机的控制操作。 对电网进行监控，以确定连接到电网的电力用户定义的能量需求与连接到电网的电力供应商的能源供应之间是否存在匹配。 例如，可以监测能源的价格。 在发电厂能源供应超过能源需求的情况下，能源需求与能源供应量之间的差距超过第一阈值时，通过发电机的能量流量相反，从而使发电机 消耗从电网接收的电力。 从而可以减少不足，并且能够稳定电力网。

公开(公告)号：US10447114B2

公开(公告)日：2019-10-15

申请号：US15510690

申请日：2015-09-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Tune Pedersen

IPC: H02K7/18 ,  H02M7/493 ,  H01F27/28 ,  H01F38/00 ,  H02M5/458

Abstract: When performing interleaved switching, a power generation system may include chokes for filtering out a high-frequency ripple. However, because the chokes are interconnected, a common mode current can flow between the different parallel converters. Instead of connecting all the outputs of a parallel converter to the same choke, the same phase of each of the parallel converters is sent to one of the chokes. For example, the first phase signals are sent to a first choke, the second phase signals are sent to a second choke, and so forth. By doing so, air gaps in the chokes can be manipulated in order to provide a different inductance for the common mode current than a grid current. For example, the air gaps may be arranged such that the inductance corresponding to the common mode current is greater than the inductance corresponding to the grid current.

公开(公告)号：US20180112647A1

公开(公告)日：2018-04-26

申请号：US15572256

申请日：2016-06-08

Applicant: VESTAS WIND SYSTEMS A/S

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

IPC: F03D7/02 ,  H02J3/38 ,  H02H7/26 ,  H02J3/42

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.