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：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

IPC: H02J3/38 ,  H02J3/00 ,  H02J3/16 ,  H02J3/46 ,  F03D7/02

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.

公开(公告)号：US20180291876A1

公开(公告)日：2018-10-11

申请号：US15573931

申请日：2016-06-16

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Yi ZHOU ,  Gert Karmisholt ANDERSEN ,  Manoj GUPTA ,  Vajira Suminda GANEPOLA ,  Ciprian BIRIS ,  Miguel Angel COVA ACOSTA

IPC: F03D7/02 ,  F03D9/25 ,  G05B13/02 ,  G01R19/25 ,  H02K7/18 ,  H02P9/00

Abstract: A method is provided of protecting a wind turbine with a doubly-fed induction generator (DFIG) against a sub-synchronous resonance (SSR) event acting on the wind turbine. A plurality of power-output values or current-output values is measured over a given period of time that corresponds to a measurement cycle. It is determined whether power-output values or current-output-values measured in the at-least-one measurement cycle are indicative of an SSR-event critical for further operation of the wind turbine. The wind turbine is shut down if the measured power-output values or current-output values are indeed indicative of an SSR-event critical for operation of the wind turbine.

公开(公告)号：US20160134114A1

公开(公告)日：2016-05-12

申请号：US14899694

申请日：2013-06-18

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Amit Kumar GUPTA ,  Manoj GUPTA ,  Dilip Kumar GURU

IPC: H02J3/01 ,  G01R19/00 ,  H02J3/38 ,  G01R27/02 ,  H02M1/12 ,  H02M7/44

CPC classification number: H02J3/01 ,  G01R19/0092 ,  G01R27/02 ,  H02J3/1842 ,  H02J3/382 ,  H02J3/383 ,  H02J3/386 ,  H02M1/12 ,  H02M7/44 ,  Y02E10/763 ,  Y02E40/22

Abstract: The invention relates to a control system for compensating undesired electrical harmonics on an electrical grid. Part of the control system referred to as a harmonic compensator is operatively connected with a power inverter of a power producing unit supplying power to the grid. Another part of the control system, referred to as an impedance detector, is operatively connected to a point of coupling to which point one or more power producing units are connected. The impedance detector is configured to scan impedances as a function of frequency to identify frequencies of impedance peaks which peaks are indicative of resonance frequencies. The determined resonance frequencies are supplied to one or more the harmonic compensators. A compensator determines control signals to the inverter which causes the inverter to inject compensation currents to the grid which currents will damp currents oscillating at or close to the determined resonance frequency.

Abstract translation: 本发明涉及一种用于补偿电网上不需要的电谐波的控制系统。 被称为谐波补偿器的控制系统的一部分与向电网供电的发电单元的功率逆变器可操作地连接。 称为阻抗检测器的控制系统的另一部分可操作地连接到连接点，一个或多个功率产生单元连接到该点。 阻抗检测器被配置为扫描作为频率的函数的阻抗，以识别峰值指示谐振频率的阻抗峰值的频率。 所确定的谐振频率被提供给一个或多个谐波补偿器。 补偿器确定到逆变器的控制信号，使逆变器向电网注入补偿电流，电流将阻尼在或接近所确定的谐振频率振荡的电流。

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

IPC: H02J3/00 ,  H02J3/38 ,  H02P9/02 ,  H02J13/00 ,  G05B13/02

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.

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：US20190305556A1

公开(公告)日：2019-10-03

申请号：US16341490

申请日：2017-09-27

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Nolan Dadang CALIAO ,  Manoj GUPTA ,  Mario Dante JARDIEL ,  Janakirama SIVASANKARAN

IPC: H02J3/18 ,  F03D7/04 ,  H02J3/38 ,  F03D9/25

Abstract: A method for controlling a renewable energy power plant comprising a plurality of wind turbine generators, the method comprising: measuring a voltage level associated with a point of interconnection between a power transmission network and the power plant; calculating a reactive power exchange limit based upon the measured voltage level; and controlling the power plant so that the calculated reactive power exchange limit is not exceeded.

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：US20160245259A1

公开(公告)日：2016-08-25

申请号：US15031044

申请日：2014-09-26

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj GUPTA ,  Amit Kumar GUPTA ,  Dilip Kumar GURU

IPC: F03D9/00 ,  H02H7/06 ,  H02J3/38 ,  F03D7/04 ,  H02P9/10

Abstract: A method for controlling a wind power plant, the wind power plant including a plant controller for controlling a plurality of wind turbine generators. The method for controlling a wind power plant allows the wind power plant to continue operating through a grid fault in a weak grid environment. In the method, a fault recovery process is carried out with a wind turbine power controller during a wind turbine fault recovery state to determine a grid voltage (VWTG), compare the grid voltage to a predetermined reference voltage (Vref) to obtain a difference value, and determine a current reference (QrefVC) based on the difference value for generating a reactive current (Idref) for regulating the grid voltage to the predetermined reference grid voltage. A corresponding wind power plant is further provided.

Abstract translation: 一种用于控制风力发电厂的方法，所述风力发电厂包括用于控制多个风力涡轮发电机的设备控制器。 控制风力发电厂的方法允许风力发电厂在弱电网环境中通过电网故障继续运行。 在该方法中，在风力涡轮机故障恢复状态期间，利用风力涡轮机功率控制器进行故障恢复处理，以确定电网电压（VWTG），将电网电压与预定参考电压（Vref）进行比较以获得差值 ，并且基于用于产生用于将电网电压调节到预定参考电网电压的无功电流（Idref）的差值来确定电流参考（QrefVC）。 进一步提供相应的风力发电厂。