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：US11286904B2

公开(公告)日：2022-03-29

申请号：US16957100

申请日：2018-12-05

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Gert Karmisholt Andersen ,  Lars Helle ,  Poul Møhl Dyrlund ,  Morteza Rabi ,  Duy Duc Doan

IPC: F03D9/00 ,  H02P9/04 ,  F03D7/02 ,  F03D9/25 ,  F03D7/04 ,  H02P9/10 ,  H02P101/15

Abstract: A method for use in controlling a wind turbine generator of a wind power plant based on a condition of a power converter or a component forming part of a power converter in the wind power plant. The method comprises determining the initial condition of the power converter or a component forming part of a power converter and determining the evolution of the condition from the initial condition based on notional power reference values of the wind turbine generator. The method further comprises comparing the evolution of the condition to a predetermined threshold and determining, from the comparison, a time period by which the condition of the power converter or a component forming part of a power converter will substantially equal the predetermined threshold.

公开(公告)号：US10763670B2

公开(公告)日：2020-09-01

申请号：US16302557

申请日：2017-05-16

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Søren Viisholm Trankjær ,  Lars Helle ,  Torben Petersen

IPC: H02J3/00 ,  H02J3/38 ,  H02J50/10 ,  H01F38/14 ,  H01F38/18 ,  H02J7/02

Abstract: Aspects of the present disclosure are generally directed to using a rotary transformer to transfer power for a wind turbine generator. Certain aspects of the present disclosure are directed to a multi-rotor wind turbine. The multi-rotor wind turbine generally includes a plurality of rotors, a plurality of electrical generators, each coupled to one of the plurality of rotors, and one or more rotary transformers configured to transfer power between the electrical generators and a power grid. In some aspects, each rotary transformer comprises a first winding coupled to one or more electrical generators of the plurality of electrical generators, and a second winding magnetically coupled to the first winding and coupled to the power grid, wherein the first winding is rotatable with respect to the second winding.

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：US12199520B2

公开(公告)日：2025-01-14

申请号：US17769282

申请日：2020-10-14

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Lars Helle ,  Cem Özgür Gerçek

IPC: H02B13/00 ,  F03D80/50 ,  H02B1/06 ,  H02B13/075 ,  H02K7/18 ,  H02M7/00

Abstract: A wind turbine system with a medium voltage (MV) converter system for converting electric power by the wind turbine generator. A housing, e.g. a placed on the ground near the wind turbine tower, encloses the MV converter to block access. An access door with a controllable locking mechanism is controlled by an access control system which unlocks the access door after execution of a safety access algorithm. This allows a person to provide service to the potentially dangerous MV equipment in a safe an automated way after request. The housing preferably has a control compartment where a person can request access and await opening of the access door for safe access to the MV converter.

公开(公告)号：US12015333B2

公开(公告)日：2024-06-18

申请号：US17634959

申请日：2020-08-12

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Cem Özgür Gerçek ,  Lars Helle ,  Ciprian Biris

IPC: H02M1/00 ,  H02J3/38 ,  H02M1/32 ,  H02M7/483 ,  H02M7/5395

CPC classification number: H02M1/0095 ,  H02J3/381 ,  H02M1/322 ,  H02M7/483 ,  H02M7/4835 ,  H02M7/5395 ,  H02J2300/28

Abstract: This disclosure proposes procedures and systems for discharging system capacitors and de-energizing power transmission systems having Modular Multilevel Converter (MMC) topologies by intelligent control of MMC cell components including configuration of bypass and insert switches using integrated DC choppers to effectively de-energize MMC cell capacitors and/or DC-link capacitors under operating conditions such as after a normal stop, for protection against over-voltages, dumping turbine energy, and under certain hardware fault conditions.

公开(公告)号：US11901809B2

公开(公告)日：2024-02-13

申请号：US17762326

申请日：2020-09-17

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Masoud Parkhou ,  Lars Helle ,  Cem Özgür Gerçek

IPC: H02M7/483 ,  H02M1/00 ,  H02M1/32 ,  H02J7/00 ,  H02J3/46 ,  H02J7/34 ,  H02M1/36

CPC classification number: H02M1/32 ,  H02J7/0016 ,  H02J7/0019 ,  H02M1/0067 ,  H02M1/0095 ,  H02M7/483 ,  H02M7/4833 ,  H02M7/4835 ,  H02J3/46 ,  H02J7/345 ,  H02J2207/20 ,  H02J2207/50 ,  H02J2300/28 ,  H02M1/36

Abstract: According to embodiments described herein a Modular Multilevel Converter (MMC) is pre-charged by: driving a bypass current from an auxiliary power source through a plurality of bypass switches included in a corresponding plurality of cells; in response to a summed voltage across a plurality of cell capacitors included in the plurality of cells satisfying a drive threshold, driving an insert current through a plurality of insert switches included in the plurality of cells; and in response to a voltage across a Direct Current (DC) link capacitor satisfying a pre-charge threshold when driving the insert current, opening a circuit breaker connecting the auxiliary power source with the plurality of cells and connecting a generator with external power line rails between which the DC link capacitor is connected.

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：US10236686B2

公开(公告)日：2019-03-19

申请号：US15517881

申请日：2015-09-22

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： John Godsk Nielsen ,  Søren Andersen ,  Duy Duc Doan ,  Lars Helle

IPC: H02J3/18 ,  H02J3/16 ,  H02J3/38 ,  H02J3/28 ,  F03D7/02 ,  H02H7/06 ,  H02P9/04

Abstract: Techniques are described for operating a wind power facility in order to provide reactive power support to a power grid. The wind power facility may be a wind turbine or a wind power plant. An exemplary method includes increasing an amount of reactive power injected into the power grid, decreasing an amount of active power injected into the power grid by a certain amount, and dissipating and/or storing substantially the certain amount of active power.

公开(公告)号：US09476408B2

公开(公告)日：2016-10-25

申请号：US14206113

申请日：2014-03-12

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Shu Yu Cao ,  Anshuman Tripathi ,  Kim B. Larsen ,  Gert Karmisholt Andersen ,  Lars Helle

IPC: F03D7/02 ,  H02J3/38 ,  H02P9/48 ,  H02P21/14 ,  H02P101/15

CPC classification number: F03D7/0272 ,  H02J3/386 ,  H02P9/48 ,  H02P21/141 ,  H02P2101/15 ,  Y02E10/763

Abstract: A method of controlling a wind turbine generator is provided, the wind turbine generator converting mechanical energy to electrical. The method comprises: determining an electromagnetic power reference representing the electromagnetic power generated by the wind turbine generator, wherein the electromagnetic power reference is determined based on a desired output of the wind turbine generator; controlling the electrical power generated by the wind turbine generator using a control signal, wherein the control signal is derived from the electromagnetic power reference and is modified in dependence on an inverse power function of the wind turbine generator by incorporating minimal copper loss constraint and stator voltage limiting constraint such that non-linearity of the wind turbine generator is compensated in the control loop and it operates at its maximum efficiency. One effect of the method is that classical linear control loop design can be employed in spite of the plant being a non-linear identity.

Abstract translation: 提供了一种控制风力发电机的方法，风力发电机将机械能转换为电力。 该方法包括：确定表示由风力涡轮发电机产生的电磁功率的电磁功率参考，其中基于风力涡轮发电机的期望输出来确定电磁功率基准; 使用控制信号来控制由风力涡轮发电机产生的电力，其中控制信号是根据电磁功率参考导出的，并且根据风力涡轮发电机的反功率函数，通过并入最小铜损约束和定子电压 使得风力涡轮发电机的非线性在控制回路中得到补偿，并以其最大效率运行。 该方法的一个效果是尽管植物是非线性身份，但是可以采用经典的线性控制回路设计。