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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
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.
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公开(公告)号：US20200287386A1
公开(公告)日：2020-09-10
申请号：US16646207
申请日：2018-09-03
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Manoj GUPTA , Janakiraman SIVASANKARAN , Leif Svinth CHRISTENSEN
Abstract: A control system for controlling the power output of a plurality of renewable energy generators, a power network connecting those generators to a Point of Interconnection (PoI) with which the power network is connected to an external power grid, and measurement means configured to measure electrical parameters associated with the Point of Interconnection, wherein the control system is configured to: operate each renewable energy generator to achieve a respective current level at a terminal of the generator that is equal to a current set point; implement, during a grid fault event, a feedback control routine in which the control system: determines a measured value of an electrical parameter at the Point of Interconnection, determines a target value of the electrical parameter; and modifies the current set point based on the measured value and the target value of the electrical parameter.
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Patent Agency Ranking
公开(公告)号：US20210083476A1
公开(公告)日：2021-03-18
申请号：US16956880
申请日：2018-11-20
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Manoj GUPTA , Janakiraman SIVASANKARAN
Abstract: A method for operating a wind turbine generator connected to a power network to account for recurring voltage faults on the power network caused by automatic reclosure of at least one circuit breaker following a short-circuit. The method comprises: identifying a deviation of voltage level of the power network from a normal operational voltage level of the network; determining that the identified deviation fulfils criteria for automatic reclosure; and operating the wind turbine generator in a recurring fault mode if automatic reclosure criteria are fulfilled. When operating the wind turbine generator in recurring fault mode, the method comprises: monitoring the recovery of the voltage level from the deviation; categorising the recovery of the voltage as one of at least a strong recovery or a weak recovery; and implementing a ride-through protocol according to the category of recovery.
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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
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.
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公开(公告)号：US20210184462A1
公开(公告)日：2021-06-17
申请号：US16638670
申请日：2018-07-05
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Manoj GUPTA , Janakiraman SIVASANKARAN , Anoop Vijay TIWARI
Abstract: A method for controlling a renewable energy power plant comprising a plurality of renewable energy generators, the method comprising: carrying out the following steps dynamically: determining a reactive power capability value of the power plant based on the generated active power of each of the renewable energy generators within the power plant; determining a reactive power exchange limit value based on a measured grid voltage level; and controlling the power plant so that the generated reactive power does not exceed the lower of the determined reactive power capability value and the determined reactive power exchange limit value that are determined dynamically.
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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
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.
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公开(公告)号：US20200076193A1
公开(公告)日：2020-03-05
申请号：US16468251
申请日：2017-11-24
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian BIRIS , Manoj GUPTA , Henrik MØLLER , Kouroush NAYEBI , Janakiraman SIVASANKARAN , Mu WEI , Hans Kristian BJØRN
Abstract: A wind power plant system comprising: a plurality of wind turbine generators each having a corresponding generator controller, and a power plant controller for controlling the power generated by the wind power plant system; wherein at least some of the plurality of generator controllers are each configured to: generate a model that indicates the thermal capacity of one or more components of the wind turbine generator, determine power capacity data from the model, said data relating to: at least one reactive power supply level and a corresponding time limit for which that reactive power supply level may be maintained, and transmit to the power plant controller the determined power capacity data, wherein the power plant controller is operable to receive the power capacity data from the plurality of generator controllers and to transmit respective power references to the plurality of generator controllers to control the power generated by the wind power plant system.
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