公开(公告)号：US20210006068A1

公开(公告)日：2021-01-07

申请号：US16956923

申请日：2018-11-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj GUPTA ,  Ravi KUMAR ,  Janakiraman SIVASANKARAN ,  Thomas Schmidt GRAU ,  Martin Ansbjerg KJÆR ,  Kouroush NAYEBI ,  John NIELSEN ,  Jesper Sandberg THOMSEN

IPC: H02J3/00 ,  H02J3/38 ,  H02J3/12 ,  H02J3/24

Abstract: A method for operating a renewable energy power plant comprising a plurality of renewable energy generators. The method comprises: identifying a predetermined condition of the renewable energy power plant, of the grid, or of the connection between the renewable energy power plant and the grid, the predetermined condition indicating a weak grid interconnection between the renewable energy power plant and the grid; and controlling each renewable energy generator in an adaptive active power mode in response to recovery of the grid from a voltage deviation. The adaptive active power mode comprises: determining a thermal capacity of a chopper resistor of the renewable energy generator; calculating, based upon the determined thermal capacity, a limit level of rate of change of active power output that may be implemented by the renewable energy generator; and operating the renewable energy generator to output active power at the calculated rate of change limit level.

公开(公告)号：US20170314534A1

公开(公告)日：2017-11-02

申请号：US15521573

申请日：2015-09-23

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj GUPTA ,  Ravi KUMAR

IPC: F03D7/04 ,  F03D9/25 ,  F03D7/02 ,  H02J3/16 ,  H02J3/38 ,  H02J3/00

CPC classification number: F03D7/048 ,  F03D7/0284 ,  F03D9/257 ,  H02J3/16 ,  H02J3/386 ,  H02J2003/001 ,  Y02E10/723 ,  Y02E10/725 ,  Y02E10/763 ,  Y02E40/34

Abstract: In various embodiments of the present disclosure, there is provided a method of operating a wind power plant in a weak grid environment in order to achieve desired system stability criteria and to support an electrical grid during small disturbances or faults, the wind power plant being coupled to an electrical grid, and including a power plant controller for controlling a plurality of wind turbine generators of the wind power plant, the method including: determining whether the electrical grid fulfils a weak grid criterion; setting the power plant controller to operate in a weak grid mode when the weak grid criterion is fulfilled, the weak grid mode including: reducing and providing an active power reference according to which the plurality of wind turbine generators are controlled, when a grid voltage deviates beyond a threshold voltage from a normal or recommended operating voltage range during steady state operation of a wind power plant; and generating a reduced amount of active power with each of the plurality of wind turbine generators based on the provided active power reference& controlling the active power ramp rates, when the electrical grid recovers from the voltage deviation or a fault. A corresponding wind power plant is further provided. The coordinated operation of the plant level control and WTG level control plays an important role.

公开(公告)号：US20210143642A1

公开(公告)日：2021-05-13

申请号：US16618689

申请日：2018-05-15

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj GUPTA ,  Ravi KUMAR ,  Janakiraman SIVASANKARAN ,  Mario Dante JARDIEL ,  Anoop Vijay TIWARI ,  Kouroush NAYEBI

IPC: H02J3/18 ,  H02J13/00 ,  H02J3/00 ,  G05B15/02

Abstract: There is provided a method of operating a renewable power plant that is connected to a wider power network by a bus. The method comprises: identifying a predetermined voltage condition of the renewable power plant or of the bus; controlling the renewable power plant to maintain zero reactive power exchange at the bus for a first period; calculating an average voltage level of the bus that was achieved during the first period; and controlling the renewable power plant to maintain the voltage output at a set voltage level for a second period, the set voltage level being substantially equal to the calculated average voltage level. The method ensures that voltage oscillations due to a push-pull phenomenon between a power plant controller and the power network do not upset the stability of the grid.

公开(公告)号：US20210167601A1

公开(公告)日：2021-06-03

申请号：US16954045

申请日：2018-11-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj GUPTA ,  Ravi KUMAR ,  Janakiraman SIVASANKARAN

IPC: H02J3/32 ,  H02J13/00 ,  H02J3/38 ,  H02J3/46 ,  G05B15/02

Abstract: A method of controlling a hybrid power plant connected to a power network, the hybrid power plant having a first renewable energy generator and a second renewable energy generator, the first renewable energy generator being configured to generate power using a different source of renewable energy to the second renewable energy generator. The method comprises: determining a target plant power output for the hybrid power plant; determining a target generator power output for each of the first and second generators based on the target plant power output; determining a respective ramp rate for each of the first and second renewable energy generators based, at least in part, on an attribute of the respective renewable energy generator; and operating each of the first and second renewable energy generators to change its power output to the power network at the determined ramp rate to achieve the target generator power output.

公开(公告)号：US20170335824A1

公开(公告)日：2017-11-23

申请号：US15524208

申请日：2015-10-14

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj GUPTA ,  Kouroush NAYEBI ,  Ravi KUMAR

IPC: F03D7/04 ,  H02J3/16 ,  F03D7/02 ,  H02J3/48

CPC classification number: F03D7/048 ,  F03D7/0284 ,  F05B2270/1033 ,  F05B2270/337 ,  H02J3/16 ,  H02J3/386 ,  H02J3/48 ,  H02J2003/001 ,  Y02E10/723 ,  Y02E10/763 ,  Y02E40/34

Abstract: In various embodiments of the present disclosure, there is provided a method of controlling active power generation of a wind power plant coupled to a power grid, the wind power plant including a power plant controller for controlling a plurality of wind turbine generators. In an embodiment, the method includes monitoring an operational status of a plant compensation equipment and adjusting a plant reactive power capability when the operational status of the plant compensation equipment indicates a fault in the plant compensation equipment. According to an embodiment, the method includes controlling the wind power plant to curtail the active power generated by the wind power plant by a curtailment amount determined based on the adjusted plant reactive power cap ability. A corresponding wind power plant is further provided.

公开(公告)号：US20200313440A1

公开(公告)日：2020-10-01

申请号：US16307099

申请日：2017-05-31

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj GUPTA ,  Ravi KUMAR ,  Kouroush NAYEBI ,  Vajira Suminda GANEPOLA

IPC: H02J3/38 ,  H02J3/46 ,  H02J13/00

Abstract: A power plant control system for a first renewable energy power plant comprising one or more renewable energy generators. The power plant control system comprises receiving means for receiving a power delivery demand from a transmission grid operator; control means configured to control the one or more renewable energy generators of the first renewable energy power plant so as to supply power that targets the received power delivery demand; and communication means configured to transmit a request to one or more further renewable energy power plant control systems to request operation of one or more power compensation units associated with respective ones of the further renewable energy power plants.