-
公开(公告)号：US20170331295A1
公开(公告)日：2017-11-16
申请号：US15521910
申请日：2015-10-19
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Tusitha ABEYASEKERA , Duy Duc DOAN , Lars HELLE , Søren ANDERSEN , John Godsk NIELSEN
IPC: H02J3/38 , F03D7/04 , F03D9/25 , H02M1/00 , H02P101/15
CPC classification number: H02J3/386 , F03D7/042 , F03D9/255 , H02M2001/0003 , H02P2101/15 , Y02E10/723 , Y02E10/725 , Y02E10/763
Abstract: A wind turbine converter system with a rectifier and an inverter and a converter controller has at least first and second converter strings. The converter system is controlled by a master-converter controller and a slave-converter controller. The master-converter controller controls the first converter string and the slave-converter controller controls the second converter string. The master-converter controller receives commands from a superordinate wind turbine controller, provides the slave-converter controller with string-control commands on the basis of the superordinate control commands, and controls the conversion operation of the first converter string on the basis of the superordinate control command. The slave-converter controller receives the string-control commands from the master-converter controller and controls the conversion operation of the second converter string on the basis of the string-control commands received. The first and the second converter strings can be arranged in a bipolar configuration giving access to a neutral point. Fault detection can be performed based on current through the neutral. The system is capable of fault ride-through. Also, in case of failure of the master-converter controller, a redundant unit takes its place.
-
Patent Agency Ranking
公开(公告)号：US20180112647A1
公开(公告)日：2018-04-26
申请号：US15572256
申请日：2016-06-08
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Tusitha ABEYASEKERA , Duy Duc DOAN , Gert Karmisholt ANDERSEN , Lars HELLE , Søren ANDERSEN , Tune Pedersen , John Godsk Nielen
Abstract: A method, converter arrangement, and controller are disclosed for connecting an output of a converter with an electrical grid to control inrush currents into a grid filter assembly connected with the output of the converter, the electrical grid carrying an alternating current (AC) signal having one or more phases. The method includes determining a voltage of the AC signal and operating, after pre-charging a direct current (DC) link of the converter to a predetermined voltage, the converter using open-loop voltage control to produce an AC output signal that substantially matches the AC signal of the electrical grid. The open-loop voltage control is based on the determined voltage of the AC signal. The method further includes closing, after a predetermined amount of time of operating the converter using the open-loop voltage control, a switching device to thereby connect the output of the converter with the electrical grid.
-
公开(公告)号：US20230417220A1
公开(公告)日：2023-12-28
申请号：US18341956
申请日：2023-06-27
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Tusitha ABEYASEKERA , Per Hagen NIELSEN
CPC classification number: F03D7/0284 , H02J3/381 , H02J2300/28 , H02J2203/10 , H02J2203/20 , F03D7/048
Abstract: Operating a renewable energy power plant connected to a power network at a point of interconnection. The plant includes: one or more renewable energy generators connected to a collection point of the renewable energy power plant, and a connecting network connecting the collection point to the point of interconnection. One method includes: receiving one or more measurement signals indicative of measured power characteristics of the renewable energy power plant at the point of interconnection; determining a dynamic short circuit ratio (DSCR) at the point of interconnection based on the one or more measurement signals; determining an equivalent dynamic short circuit ratio (EDSCR) at the collection point based on the determined DSCR at the point of interconnection and one or more components of an impedance of the connecting network; and controlling the one or more renewable energy generators by determining and dispatching active power set points based on the determined EDSCR.
-
公开(公告)号：US20220364546A1
公开(公告)日：2022-11-17
申请号：US17633870
申请日：2020-08-06
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Tusitha ABEYASEKERA
Abstract: Embodiments herein describe operating wind turbines in an offshore park to provide auxiliary power to a local AC grid or to an onshore grid during a grid malfunction. In one embodiment, the offshore park is coupled via a HVDC link to an onshore grid. When the HVDC link is down, a substation in the park includes a backup generator for creating a weak grid for powering auxiliary systems in a pilot turbine. The wind turbines in the park can switch to an auxiliary control system help power the auxiliary systems in the substation and in other turbines. In another embodiment, the offshore park is AC coupled to an onshore grid using a transformer in the substation. The wind turbines can participate in a brown or black start following a grid fault by switching to operating using the auxiliary control system.
-
公开(公告)号：US20170114779A1
公开(公告)日：2017-04-27
申请号：US15129193
申请日：2015-03-19
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Tusitha ABEYASEKERA
Abstract: An inductor 1 for connecting a wind turbine generator to the electricity grid is mounted within a housing 2, and the coils of the inductor 1 are cooled by means of cooling plates 3 located within the coils, and in which are formed tubular conduits. Coolant liquid is supplied to the conduits through supply pipes 7 which are connected to the conduits by means of connectors 8 mounted underneath the housing 2 , such that any coolant liquid which escapes from the connectors 8 falls under gravity into a drip tray 10 arranged below the housing 2. Corresponding connectors are provided underneath the housing for connecting the conduits to outflow pipes. A sensor 11 within the drip tray 10 detects the presence of any coolant liquid which has leaked from the connectors 8 and, in response, generates an alarm signal which is transmitted to control circuitry for disconnecting the inductor 1 and shutting down the wind turbine generator.
-
公开(公告)号：US20160241153A1
公开(公告)日：2016-08-18
申请号：US15030316
申请日：2014-10-14
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Tusitha ABEYASEKERA , Duy Duc DOAN , Lars HELLE , Allan Holm JØRGENSEN , John Godsk NIELSEN , Søren ANDERSEN
CPC classification number: H02M5/42 , F03D9/255 , G01R31/40 , H02H3/105 , H02H7/122 , H02J3/28 , H02J3/386 , H02M1/12 , H02M1/32 , H02M5/4585 , H02M7/219 , H02M7/23 , H02M7/493 , H02M2001/0077 , H02M2001/123 , H02M2007/4822 , H03H7/0107 , Y02E10/725 , Y02E10/726 , Y02E10/763 , Y02E10/766 , Y02E70/30
Abstract: A wind turbine generator 1 supplies three-phase a.c. current of variable voltage and variable frequency to two pairs of rectifiers 4a, 4b and 4c, 4d which generate respective d.c. outputs connected to positive, negative and neutral d.c. conductors 6, 7, 8. The outputs from each pair of rectifiers are connected together, and the outputs from the two pairs are connected in series to create a high-voltage d.c. output. Inverters 10a, 10b, 10c, 10d then convert the d.c. power to a.c. at a fixed frequency and voltage suitable for In connection to the mains grid. To reduce the effect of common-mode noise, a capacitor is connected between the 1 neutral conductor 7 and earth, and a respective filter circuit 30 is connected between each of the a.c. outputs of the inverters 10a, 10b, 10c, 10d and earth. To reduce the effect of voltage surges during lightning, a surge protection device is also connected between the neutral d.c. conductor 7 and earth. Any imbalance in the current in the positive and negative conductors 6, 8 is compensated by detecting the presence of current flowing in the neutral conductor 7. Power supplied to auxiliary circuits from the output of one of the inverters, e.g. 10a, of the wind turbine is measured, and any resulting imbalance between the current in the positive and negative conductors is compensated. In the event of an earth-leakage fault in the conductors connecting the a.c. outputs of the inverters to the grid, when isolated, isolation detection relays 25 are provided.
Abstract translation: 风力发电机1提供三相交流电。 可变电压和可变频率的电流为两对整流器4a，4b和4c，4d，它们产生相应的直流。 输出连接到正，负和中性直流。 导体6,7,8。每对整流器的输出连接在一起，两对的输出串联连接，以产生高压直流。 输出。 逆变器10a，10b，10c，10d然后转换直流。 权力到a.c. 在固定的频率和电压适用于连接到电网。 为了降低共模噪声的影响，电容器连接在1个中性导体7和地之间，并且相应的滤波器电路30连接在每个直流电平之间。 逆变器10a，10b，10c，10d和地的输出。 为了减少雷击期间电压浪涌的影响，浪涌保护装置也连接在中性点间。 导体7和地球。 通过检测在中性导体7中流动的电流的存在来补偿正和负导体6,8中的电流的任何不平衡。从一个逆变器的输出，例如， 测量风力涡轮机的10a，并补偿正，负导体中的电流之间的任何不平衡。 在连接交流电的导体中发生漏电故障的情况。 当隔离的隔离检测继电器25被提供时，逆变器的输出到电网。
-
-
-
-
-
Search Results
6
records
(took 0.016 seconds)
