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公开(公告)号：EP3278447A1
公开(公告)日：2018-02-07
申请号：EP16709267.5
申请日：2016-03-08
摘要： The present invention relates to a method for operating a doubly fed induction generator wind power facility during an OVRT event, said the wind turbine facility being adapted to inject active and/or reactive current into an associated grid, the method comprising the steps of determining the occurrence of an over voltage grid event, and maintaining a grid-side inverter of the doubly fed induction generator wind power facility fully operable during the over voltage ride though event so as to maintain a controllable active and/or reactive current capability during the over voltage grid event,?
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公开(公告)号：EP3371882B1
公开(公告)日：2019-08-14
申请号：EP17726107.0
申请日：2017-05-16
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公开(公告)号：EP3371882A1
公开(公告)日：2018-09-12
申请号：EP17726107.0
申请日：2017-05-16
CPC分类号： H02P9/007 , F03D7/0284 , F05B2270/1071 , H02J3/18 , H02J3/1892 , H02P2207/073 , Y02E40/30
摘要： Aspects of the present invention relate to a method for controlling an amount of reactive current provided from a wind turbine generator to a power grid during an abnormal power grid event, said wind turbine generator comprising a doubly-fed induction generator having a rotor and a stator, and a power converter coupling the rotor to the power grid, the power converter comprising a grid-side inverter, wherein the method comprises the step of balancing the reactive current provided to the power grid between a reactive stator current and a reactive grid-side inverter current, wherein the reactive grid-side inverter current is controlled in accordance with a reactive current capacity of a grid breaker receiving the reactive current provided by the grid-side inverter. Aspects of the present invention also relate to a wind turbine generator being capable of performing the method.
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公开(公告)号：EP4111569A1
公开(公告)日：2023-01-04
申请号：EP21706165.4
申请日：2021-02-03
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公开(公告)号：EP3464889A1
公开(公告)日：2019-04-10
申请号：EP17727097.2
申请日：2017-05-16
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公开(公告)号：EP3462559A1
公开(公告)日：2019-04-03
申请号：EP18196816.5
申请日：2018-09-26
摘要： The invention relates to a fault ride through method for controlling a wind turbine during a grid fault where the grid voltage drops below a nominal grid voltage. After detection of a grid fault, the total current limit for the power converter output is increased to a total maximum overload current limit. This may allow generation of an increased active current for compensating a reduction in active power. Depending on whether active or reactive current generation is prioritized, an active or reactive current reference is determined initially. The active current reference is determined in a way so that a reduction in active power production due to the grid voltage drop is minimized and based on the condition that the vector-sum of the active output current Iq and the reactive output current Id is limited according to the total maximum overload current limit, and a maximum period of time is determined in which the power converter can be controlled based on the active and reactive current references. Afterwards the power converter is controlled based on the active and reactive current references.
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公开(公告)号：EP3314741A1
公开(公告)日：2018-05-02
申请号：EP16732442.5
申请日：2016-06-09
发明人： ANDERSEN, Gert Karmisholt , BIRIS, Ciprian , ZHOU, Yi , GUPTA, Manoj , GANEPOLA, Vajira Suminda , MERRILD, Uffe C.
摘要： A method is provided of controlling a doubly fed induction generator—(DFIG) wind turbine converter system if a sub-synchronous resonance event acts on the wind turbine. According to the method a sub-synchronous resonance event is detected. Thereupon, a switch from a non-SSR-current/voltage control mode to a SSR-control mode is performed. At least one of the following activities is performed in the SSR-control mode, namely: (i) freezing rotor AC voltages in magnitude and phase, (ii) altering at least one rotor-current-controller gain (iii) altering at least one rotor-current-controller time constant, to dampen the effect of the SSR-event on the wind turbine.
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