-
公开(公告)号：US20190226445A1
公开(公告)日：2019-07-25
申请号：US16301654
申请日：2017-05-16
摘要： Aspects of the present disclosure are generally directed to configurations of power conversion systems for wind turbine generators. For example, certain aspects are directed to a multi-rotor wind turbine. The multi-rotor wind turbine generally includes a plurality of rotors, each coupled to a plurality of electrical generators, one or more machine-side converters, MSCs, coupled to the electrical generators of each of the plurality of rotors and configured to generate at least one direct-current, DC, signal, and one or more line-side converters, LSCs, coupled to the MSCs and configured to generate at least one AC signal based on the at least one DC signal.
-
公开(公告)号：US20160248246A1
公开(公告)日：2016-08-25
申请号：US15026181
申请日：2014-09-17
发明人： Lars HELLE , Remus TEODORESCU
CPC分类号： H02H7/26 , F03D7/0284 , F03D9/255 , F05B2260/80 , H02H3/083 , H02H3/24 , H02M5/458 , Y02E10/723
摘要： A wind turbine generator 1 is connected to a section 2 of an electricity grid 3 via a converter 4, which converts the ac output power from the generator into three-phase electric power at the voltage and frequency of the grid 3. The converter 4 comprises silicon carbide transistors which act as ON-OFF switches which are controlled so as to create a voltage profile which is the same as that of the grid voltage. Each grid section 2, 2′ has a respective circuit breaker 10, 10′ which disconnects the associated section from the remainder of the grid 3 in the event of an abnormally high current. The converter 2 includes a fault detector 11 arranged to detect grid faults, such as an abnormally low voltage level which, in response, generates an alarm signal which causes a high-level transient current to be supplied to the grid 3 sufficient to trip the circuit breaker 10′ so as to disconnect the faulty section of the grid. By using silicon carbide transistors, which can withstand high operating temperatures, a higher-level current can be generated than would be the case with converters using conventional silicon transistors.
摘要翻译： 风力发电机1经由转换器4连接到电网3的部分2，转换器4将来自发电机的交流输出功率以电网3的电压和频率转换成三相电力。转换器4包括 用作开关开关的碳化硅晶体管，其被控制以产生与电网电压相同的电压分布。 每个电网部分2,2'都有一个相应的断路器10,10'，它们在异常高电流的情况下将相关部分与电网3的其余部分断开。 转换器2包括故障检测器11，其被布置成检测电网故障，例如异常低的电压电平，其响应地产生报警信号，其引起高电平瞬态电流被提供给电网3，足以使电路跳闸 断路器10'，以便断开电网的故障部分。 通过使用可承受高工作温度的碳化硅晶体管，可以产生比使用常规硅晶体管的转换器情况更高的电流。
-
公开(公告)号：US20220123667A1
公开(公告)日：2022-04-21
申请号：US17562731
申请日：2021-12-27
发明人： Ciprian BIRIS , Cem Özgür GERÇEK , Lars HELLE , Duy Duc DOAN , Tune PEDERSEN
摘要： This disclosure proposes a topology that integrates a DC chopper into the Modular Multilevel Converter (MMC) cells of a power converter. The integrated DC chopper may include chopper resistors that may also be advantageously integrated into a heat sink for a power module comprising at least the power transistors of the MMC cell. Embodiments herein also describe a method for using an MMC cell's IGBTs and chopper resistors for providing a safe discharge of both cell capacitors and DC-link capacitors in different operating conditions.
-
公开(公告)号：US20180123470A1
公开(公告)日：2018-05-03
申请号：US15564847
申请日：2016-04-11
发明人： John Godsk NIELSEN , Søren ANDERSEN , Lars HELLE , Duy Duc DOAN
CPC分类号： H02M5/4585 , F03D9/255 , H02J3/386 , H02M7/493 , H02P27/00 , H02P27/04 , H02P29/02 , H02P29/032 , H02P2101/15 , H02P2201/03 , Y02E10/725 , Y02E10/76
摘要： A method of controlling a full-scale converter system in which both the grid-side inverter unit and the generator-side inverter unit have a series-connection of parallel inverters and form a generator-side and grid-side voltage-center-point at a voltage level between the inverters connected in series. The voltage-center-points are electrically connected by a center-line conductor. Conversion operation with a de-rated maximum active power-output is performed in response to at least one of (i) the grid-side inverter and (ii) the generator-side inverter of the first converter-string being disabled, by disabling active power production of at least one of (i) the grid-side inverter and (ii) the generator-side inverter of the second converter-string, or correspondingly reducing active power production of the second converter-string, thereby preventing a compensation current along the center-line conductor.
-
5.发明申请METHODS AND SYSTEMS FOR REDUCING THE IMPACT OF A GENERATOR SHORT CIRCUIT IN A WIND TURBINE 有权发电机短路在风力发电机中的影响的方法和系统公开(公告)号：US20160204601A1
公开(公告)日：2016-07-14
申请号：US14442311
申请日：2013-11-13
发明人： Victor DONESCU , Lars HELLE
CPC分类号： H02H9/045 , F03D7/0272 , F03D9/25 , F03D17/00 , F03D80/80 , F05B2270/328 , F05B2270/80 , H02H9/02 , H02H9/041 , H02P29/0241 , Y02E10/723 , Y02E10/725
摘要： A method is provided for reducing an impact of an unbalanced short circuit event that occurs in a polyphase permanent magnet generator of a wind turbine. According to the method, an unbalanced short circuit event is detected in the generator of the wind turbine, and, in response to detecting the unbalanced short circuit event, at least one phase of the generator is shorted at a switch-point between the generator and a converter of the wind turbine to create a balanced short circuit in the generator. By doing so, the torque response of the generator is altered to avoid high amplitude torque oscillations that would otherwise occur as a result of the unbalanced short circuit event.
摘要翻译： 提供了一种用于减少在风力涡轮机的多相永久磁铁发生器中发生的不平衡短路事件的影响的方法。 根据该方法，在风力发电机的发电机中检测到不平衡短路事件，并且响应于检测到不平衡短路事件，发电机的至少一相在发电机和发电机之间的切换点处短路 风力涡轮机的转换器，以在发电机中产生平衡的短路。 通过这样做，发电机的转矩响应被改变以避免由于不平衡的短路事件而产生的高振幅的转矩振荡。
-
公开(公告)号：US20240146209A1
公开(公告)日：2024-05-02
申请号：US17769282
申请日：2020-10-14
发明人： Lars HELLE , Cem Özgür GERÇEK
CPC分类号： H02M7/003 , F03D9/25 , F03D80/50 , H02K7/183 , F05B2220/706
摘要： A wind turbine system with a medium voltage (MV) converter system for converting electric power by the wind turbine generator. A housing, e.g. a placed on the ground near the wind turbine tower, encloses the MV converter to block access. An access door with a controllable locking mechanism is controlled by an access control system which unlocks the access door after execution of a safety access algorithm. This allows a person to provide service to the potentially dangerous MV equipment in a safe an automated way after request. The housing preferably has a control compartment where a person can request access and await opening of the access door for safe access to the MV converter.
-
公开(公告)号：US20230034965A1
公开(公告)日：2023-02-02
申请号：US17785020
申请日：2020-12-01
摘要： An off grid electric system for charging electric vehicles. An electric storage system (BTS) is arranged to store electric power generated by a plurality of wind turbines. A plurality of electric vehicle charging stations are connected to the plurality of wind turbines, and the electric storage system by means of an off grid electric power network (CN), so as to allow each charging station to charge at least one electric vehicle (EV).
-
公开(公告)号：US20180112647A1
公开(公告)日：2018-04-26
申请号：US15572256
申请日：2016-06-08
发明人： Tusitha ABEYASEKERA , Duy Duc DOAN , Gert Karmisholt ANDERSEN , Lars HELLE , Søren ANDERSEN , Tune Pedersen , John Godsk Nielen
摘要： 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.
-
9.发明申请公开(公告)号：US20210033069A1
公开(公告)日：2021-02-04
申请号：US16964186
申请日：2019-01-22
摘要： The present invention relates to wind energy park connected to an electrical grid, having airborne wind energy systems (AWES), e.g. with kites. The wind energy park has an electrical DC network connecting the plurality of AWES and a grid converter unit for converting DC to AC, and transmit AC to the electrical grid. The wind energy park control unit controls the AWES to produce electrical power to the electrical grid by alternating between a power production phase, and a recovery phase so to balance the supply of power to the electrical grid according a demanded setpoint. An advantage is that the grid converter may be smaller, as compared to an AC network, because the power is evened out with the negative power from the AWES being in recovery phase. In this way, the invention stabilizes the grid and has a grid forming capability.
-
公开(公告)号：US20190195198A1
公开(公告)日：2019-06-27
申请号：US16222413
申请日：2018-12-17
CPC分类号： F03D7/0272 , F03D7/028 , F03D9/255 , F03D17/00 , F05B2270/1033 , F05B2270/1091 , F05B2270/3032 , H02J3/386 , H02J3/46 , H02J3/48 , H02J3/50 , H02M1/32 , H02P9/006 , H02P2101/15
摘要： A method for use in controlling a wind turbine generator based on a condition of a power converter or a component forming part of a power converter in the wind turbine generator. The method comprises determining a condition of the power converter or the component forming part of a power converter, then comparing the condition to a predetermined threshold and modifying an operational parameter of the wind turbine generator if the condition substantially equals or exceeds the predetermined threshold. In particular, the invention proposes the wind turbine generator is derated if the condition of the power converter or the component forming part of a power converter substantially equals or exceeds the predetermined threshold.
-
-
-
-
-
-
-
-
-
搜索结果
19 条记录 (耗时 0.022 秒)
