公开(公告)号：US20190260208A1

公开(公告)日：2019-08-22

申请号：US16345467

申请日：2017-10-26

Applicant: MHi Vestas Offshore Wind A/S

Inventor： Tusitha ABEYASEKERA ,  Salvador ANO-VILLALBA ,  Soledad BERNAL PEREZ ,  Ramon BLASCO-GIMENEZ

IPC: H02J3/38 ,  F03D7/02 ,  H02J3/36 ,  H02J3/18

Abstract: Embodiments herein describe operating a first wind turbine using an auxiliary control system when a high-voltage link coupling a wind park to a grid is not functioning. When using the auxiliary control system, the first wind turbine provides power to a local AC grid which can be used to power auxiliary system in a second wind turbine while the second wind turbine is shutdown. However, when the high-voltage link is functional, the first and second wind turbines provide power to the high-voltage link using a primary control system.

公开(公告)号：US20210047997A1

公开(公告)日：2021-02-18

申请号：US16964396

申请日：2019-01-24

Applicant: MHI VESTAS OFFSHORE WIND A/S

Inventor： Tusitha ABEYASEKERA

IPC: F03D7/02 ,  F03D7/04 ,  H02J3/38

Abstract: Embodiments herein described provide systems and techniques for performing black start operations. For example, one embodiment provides a method for performing black start operations. The method generally includes operating a wind turbine in a wind park in a first mode to provide power to an alternating-current (AC) grid using a control system. The control system may include a reactive power control leg and an active power control leg. The method also includes switching operation of the wind turbine from the first mode to a second mode based on an indication to perform a black start of an electrical grid and by activating a controller with an integral action to thereby increase output power of the wind turbine, the controller being coupled between the reactive power control leg and the active power control leg, and providing power to the electrical grid while operating in the second mode.

公开(公告)号：US20200166017A1

公开(公告)日：2020-05-28

申请号：US16619723

申请日：2018-06-08

Applicant: MHI VESTAS OFFSHORE WIND A/S

Inventor： Torben Møller HANSEN ,  Niels Erik DANIELSEN ,  Tusitha ABEYASEKERA ,  Lars HELLE ,  Ghada Ali Diaa HILLAWI ,  Laurids Givskov JØRGENSEN ,  Paw ROSENVARD

IPC: F03D7/02 ,  F03D9/11 ,  F03D9/25

Abstract: The present invention relates to operation of a wind turbine using a power storage unit, such as a rechargeable battery, to power a group of power consuming units during grid loss. The wind turbine comprises a number of power consuming units being grouped into at least a first group and a second group, a first electrical converter for connecting the generator to the electrical grid, and a second electrical converter for connecting the electrical generator to the power storage unit. Upon detecting an occurrence of the grid loss, the generator is operated to ensure sufficient power of the power storage unit to operate the first group of power consuming units.

公开(公告)号：US20190309728A1

公开(公告)日：2019-10-10

申请号：US16345419

申请日：2017-10-26

Applicant: MHI Vestas Offshore Wind A/S

Inventor： Tusitha ABEYASEKERA ,  Salvador ANO-VILLALBA ,  Soiedad BERNAL PEREZ ,  Ramon BLASCO-GiMENEZ

IPC: F03D9/25 ,  H02J3/38 ,  F03D7/04

Abstract: Embodiments herein describe operating a control system for a wind turbine in a first mode and second mode of operation. When in the first mode, the wind turbine provides power to a local AC grid. However, when in the second mode, the wind turbine provides power to a high-voltage direct current (HVDC) link. The control system includes a reactive power control leg and an active power control leg. To switch from the first mode to the second mode, the control system activates a PI controller coupled between the reactive and active power control legs which increases the output voltage of the wind turbine until the magnitude of the voltage activates a diode rectifier and permits the power outputted by the wind turbine to be transmitted along the HVDC link.