-
1.发明申请公开(公告)号：US20200011297A1
公开(公告)日：2020-01-09
申请号：US16504090
申请日：2019-07-05
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Jesper HILLEBRANDT , Philip Carne Kjær
Abstract: The invention relates to a method for controlling a wind turbine configured with an on load tap changer transformer which enables adjustment of a current ratio of a primary side current of the transformer and a secondary side current of the transformer. The method comprises detecting that a network voltage on the primary side or secondary side of the transformer is outside a pre-determined voltage range, and in response determining a current reference for the primary side current based on the detected network voltage. The power converter of the wind turbine is controlled to generate an increase of the primary side current towards the current reference, and the current ratio of the transformer is adjusted towards a higher ratio of the current ratio.
-
公开(公告)号：US09859828B2
公开(公告)日：2018-01-02
申请号：US14765468
申请日：2013-02-07
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Germán Claudio Tarnowski , Philip Carne Kjær , Rasmus Lærke , Florin Iov , Remus Teodorescu , Andrzej Adamczyk
CPC classification number: H02P9/14 , F03D7/0284 , F03D7/045 , F03D9/11 , F05B2270/337 , F05B2270/404 , H02J3/24 , H02J3/28 , H02J3/38 , H02J3/386 , Y02E10/723 , Y02E10/763 , Y02E10/766 , Y02E70/30 , Y02P90/50
Abstract: The present invention relates to method for operating a power plant, with at least one wind turbine generator arranged for supplying power to an electrical grid, at least one energy storage device arranged for supplying power to the electrical grid, and a power plant controller, the method comprises, measuring repetitively measurement sets of at least one electrical parameter from the electrical grid, and calculating, in respect the measurement sets of the at least one electrical parameter, a change in active and/or a required change in reactive power at a point of common coupling, and calculating and dispatching of a first control reference signal to the at least one wind turbine generator and a second control reference signal to the at least one energy storage device, for providing ancillary service functionalities to the electrical grid. The invention also relates to a power plant with at least one wind turbine generator for supplying power to an electrical grid, at least one energy storage device for supplying power to the electrical grid, and a power plant controller for providing ancillary service functionalities to the electrical grid.
-
公开(公告)号：US11424704B2
公开(公告)日：2022-08-23
申请号：US17132724
申请日：2020-12-23
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Jesper Hillebrandt , Philip Carne Kjær
Abstract: The invention relates to a method for controlling a wind turbine which comprises a transformer has a variable turns ratio such as an on load tap changer transformer. The adjustment of the turns ratio is possible when a primary side current or a secondary side current of the transformer is less than a switching current threshold. The method comprises operating the wind turbine so that the primary or secondary side current is above the switching current threshold. In response to obtaining a condition for changing the turns ratio of the transformer, the wind turbine is operated so that the primary or secondary side current is reduced below the switching current threshold so that the turns ratio can be changed during the temporary current reduction.
-
公开(公告)号：US10992233B2
公开(公告)日：2021-04-27
申请号：US16478916
申请日：2018-01-29
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Catalin Gabriel Dincan , Philip Carne Kjær
Abstract: A DC to DC power converter is described that includes a transformer, a primary side connected to a primary transformer winding, and a secondary side connected to a secondary transformer winding. The secondary side comprises inductor-capacitor (LC) circuitry at an input, and a plurality of diodes providing uncontrolled rectification. A controller controls switching of the switching circuitry to apply voltage pulses to the primary transformer winding. The voltage pulses are separated by zero-voltage periods. A switching frequency of the switching circuitry is less than the resonant frequency of the LC circuitry.
-
5.发明授权公开(公告)号：US11146166B2
公开(公告)日：2021-10-12
申请号：US16461608
申请日：2017-10-30
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Philip Carne Kjær
Abstract: Embodiments herein describe a power converter in a wind turbine that includes a rectifier and an inverter. The rectifier includes a plurality of phase legs where each phase leg includes a plurality of full bridge cells configured to block fault current from flowing from a generator through the rectifier. Moreover, the wind turbine does not have any circuit breaker between the rectifier and the generator. The inverter also includes a plurality of phase legs where each phase leg includes a plurality of full bridge cells configured to block fault current from flowing from a transformer through the inverter. Moreover, the wind turbine does not have any circuit breaker between the inverter and the transformer.
-
Patent Agency Ranking
公开(公告)号：US09374014B2
公开(公告)日：2016-06-21
申请号：US13686579
申请日：2012-11-27
Applicant: Vestas Wind Systems A/S
Inventor： Philip Carne Kjær
CPC classification number: H02M5/4585 , H02M1/34 , H02M7/487 , H02M7/523 , H02M7/5387 , H02M2001/342 , H02M2007/4835 , Y02B70/1491 , Y10T307/707
Abstract: The present invention relates to a high-voltage power converter comprising a number of controllable switching valves, each switching valve comprising a plurality of series connected switching units, the high-voltage power converter further comprising a resonance circuit comprising a link inductor and a link capacitor, and a plurality of clamping circuits connected in series, each clamping circuit comprising a clamping capacitor and a clamping switching unit.
Abstract translation: 本发明涉及包括多个可控切换阀的高压功率转换器，每个切换阀包括多个串联连接的开关单元，该高压功率转换器还包括一个谐振电路，该谐振电路包括一个链路电感和一个连接电容 以及串联连接的多个钳位电路，每个钳位电路包括钳位电容器和钳位开关单元。
-
公开(公告)号：US11384733B2
公开(公告)日：2022-07-12
申请号：US15779966
申请日：2016-12-07
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Philip Carne Kjær , Florin Iov
Abstract: A method, controller, wind power plant, and computer program product are disclosed for operating a wind power plant comprising a plurality of wind turbines, the wind power plant producing a plant power output. The method comprises receiving a modulation request signal indicating a requested modulation of the plant power output, the requested modulation specifying a modulation frequency. The method further comprises generating a respective power reference signal for each of at least two wind turbines of the plurality of wind turbines selected to fulfill the requested modulation, Each generated power reference signal includes a respective modulation component corresponding to a portion of the requested modulation and having a frequency different than the modulation frequency.
-
公开(公告)号：US10044186B2
公开(公告)日：2018-08-07
申请号：US14911180
申请日：2014-07-15
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Philip Carne Kjær
CPC classification number: H02J3/02 , H02J3/386 , Y02E10/763
Abstract: A conventional cable comprises three conductive cores, each provided with a respective conductive sheath which are together housed within an outer insulating sheath. The three-core cable is used to transmit electric power in the form of dc current and single-phase ac current. A first one of the conductive cores is used to transmit dc current, while a second conductive core is used to transmit the return dc current. The third conductive core is used to transmit the single-phase ac current. The return ac current is transmitted along all three conductive outer sheaths in parallel. The cable is used to transmit dc current from a wind turbine generator to a substation where it is converted to ac before connecting to the mains electricity grid. The ac current is used to power auxiliary circuitry of the wind turbine generator when the output of the turbine generator falls below a give value.
-
公开(公告)号：US20150263526A1
公开(公告)日：2015-09-17
申请号：US14425203
申请日：2012-09-03
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Philip Carne Kjær , Dumitru-Mihai Valcan , Lars Helle
CPC classification number: H02P9/14 , F03D9/255 , H02J3/386 , H02J5/00 , Y02E10/763
Abstract: The present invention relates to a connection system for connecting a power generator to a DC electrical power system, with a controllable voltage source unit functionally connected in series with the power generator to receive AC electrical power from the power generator, and to generate an AC electrical power output accordingly, and a rectifier arranged to receive AC electrical power output from said voltage source unit and to rectify the AC electrical power output to a DC electrical power to be provided to the DC electrical power system. The invention also relates to method for connecting a power generator to a DC electrical power system.
Abstract translation: 本发明涉及一种用于将发电机连接到直流电力系统的连接系统，其中可控电压源单元与功率发生器串联功能连接，以从发电机接收交流电力，并产生交流电 功率输出，以及整流器，其布置成接收从所述电压源单元输出的AC电力，并且将AC电力输出整流到DC电力以提供给DC电力系统。 本发明还涉及将发电机连接到直流电力系统的方法。
-
10.发明授权公开(公告)号：US12237687B2
公开(公告)日：2025-02-25
申请号：US17794226
申请日：2021-01-19
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Bo Sun , Ciprian Biris , Catalin Gabriel Dincan , Philip Carne Kjær
Abstract: A method of operating a power generating system for a wind turbine connected to an electrical grid, the power generating system comprising a power generator, a converter, a transformer and a tap changer, the method comprising; when operating the power generating system in a grid-forming configuration, monitoring a signal for detecting a voltage of the electrical grid which requires an increase in output voltage from the power generating system in order to maintain the grid voltage within a predetermined voltage range; and operating the tap changer to tap-up the transformer to provide at least part of the voltage increase required to maintain the grid voltage within the predetermined voltage range.
-
-
-
-
-
-
-
-
-
Search Results
14
records
(took 0.014 seconds)
