公开(公告)号：US09556853B2

公开(公告)日：2017-01-31

申请号：US14765938

申请日：2013-02-15

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj Gupta ,  Dilip Kumar Guru ,  Amit Kumar Gupta

IPC: F03D9/00 ,  H02H3/00 ,  H02H7/093 ,  H02H3/02 ,  H02J3/38 ,  H02H3/08 ,  H01H71/10 ,  G05B23/02 ,  H01H81/00 ,  H02J3/16 ,  F03D7/02 ,  H02J3/18 ,  H02P9/00 ,  H02H7/30

CPC classification number: F03D7/048 ,  F03D7/0272 ,  F03D9/257 ,  G05B23/0235 ,  H01H71/10 ,  H01H81/00 ,  H02H3/006 ,  H02H3/025 ,  H02H3/08 ,  H02H7/093 ,  H02H7/30 ,  H02J3/16 ,  H02J3/18 ,  H02J3/38 ,  H02J3/381 ,  H02J3/382 ,  H02J3/386 ,  H02P9/006 ,  Y02E10/563 ,  Y02E10/763 ,  Y02E40/34

Abstract: A method of operating a wind turbine plant is provided. Such a wind turbine plant comprises at least one transmission branch comprising a plurality of wind turbine generators and coupled to an electrical grid at a point of common coupling through at least one circuit breaker comprising a breaking capacity. The method comprises monitoring the electrical grid for a low voltage fault event; and if a low voltage fault event is detected: calculating a grid short circuit strength, determining a short circuit current limit if the grid short circuit strength requires an initial fault current contribution which exceeds the breaking capacity of the circuit breaker to be passed through the circuit breaker, determining a maximum fault current contribution based on the short circuit current limit and operating the wind turbine generators to provide to the electrical grid the maximum fault current contribution.

Abstract translation: 提供了一种操作风力涡轮机设备的方法。 这种风力涡轮机设备包括至少一个包括多个风力涡轮发电机的传输分支，并且通过包括断路能力的至少一个断路器在公共耦合点处耦合到电网。 该方法包括监测低压故障事件的电网; 并且如果检测到低电压故障事件：计算电网短路强度，如果电网短路强度需要超过断路器通过电路的分断能力的初始故障电流贡献，则确定短路电流限制 断路器，基于短路电流限制确定最大故障电流贡献，并操作风力涡轮发电机以向电网提供最大故障电流贡献。

公开(公告)号：US10544780B2

公开(公告)日：2020-01-28

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 ,  F03D7/04 ,  H02J3/24 ,  H02H7/30 ,  H02P9/00 ,  H02J3/12 ,  H02J3/38 ,  F03D7/02 ,  H02J3/16 ,  F03D17/00 ,  F03D9/25 ,  H02H7/06 ,  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.

公开(公告)号：US10158230B2

公开(公告)日：2018-12-18

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 ,  H02M1/12 ,  H02J3/18 ,  H02J3/38 ,  G01R19/00 ,  G01R27/02 ,  H02M7/44

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.