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1. 发明申请

WO2013084374A1 LIGHTNING CURRENT TRANSFER SYSTEM FOR A WIND TURBINE GENERATOR 审中-公开
标题翻译：用于风力发电机的雷电电流传输系统
公开(公告)号：WO2013084374A1
公开(公告)日：2013-06-13
申请号：PCT/JP2012/004862
申请日：2012-07-31
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , GLOBAL LIGHTNING PROTECTION SERVICES A/S , FUJIOKA, Hideyasu , KAMEDA, Takuro , FURUKAWA, Syogo , KROGH, Thomas Holm
发明人： FUJIOKA, Hideyasu , KAMEDA, Takuro , FURUKAWA, Syogo , KROGH, Thomas Holm
IPC分类号： H02G13/00 , F03D11/00
CPC分类号： H02G13/00 , F03D80/30 , Y02E10/721
摘要： A lightning current transfer system for a wind turbine generator is provided, the wind turbine generator comprising a rotor including a hub, a blade bearing, a blade, and a spinner, and a nacelle, the blade being rotatable relative to the hub and the hub being rotatable relative to the nacelle. In order to effectively protect the wind turbine generator from damage caused by lightning, to increase flexibility of use, simplicity, rigidness, operational safety and durability of such a lightning current transfer system, especially for use in a wind turbine generator brought into offshore operation, the lightning current transfer system comprises a first electrical contact arrangement including first and second complementary contact members, the first contact member being supported at the blade and being in electrical connection with a blade conductor arrangement arranged on the blade, the second contact member being supported at the hub, the spinner or the blade bearing, wherein the first and the second contact members are arranged to be electrically connectable to each other, conducting means connected to the first electrical contact arrangement, a second electrical contact arrangement connected to the conducting means and including third and fourth complementary contact members, the third contact member being supported at the hub, the spinner or the blade bearing, the fourth contact member being supported at the nacelle, wherein the third and the fourth contact members are arranged to be electrically connectable to each other, the lightning current transfer system providing a current path for a lightning current from the blade to the nacelle, the current path including the first electric contact arrangement, the conducting means and the second electric contact arrangement, the first contact member being arranged in a predetermined distance from a blade root of the blade, said blade root being mounted to the hub by means of the blade bearing, and wherein the first contact member is formed as a discharge ring being connected to the blade conductor arrangement, the blade conductor arrangement being formed by a metal foil or a metal mesh extending over at least a part of a longitudinal extension of the blade, wherein the lightning current transfer system is disposed inside of the spinner and/or inside of the nacelle, and wherein the conducting means is mounted stationarily at a mounting member, the mounting member being supported at the spinner, the hub or the blade bearing or being formed by the spinner, the hub or the blade bearing. Moreover, a wind turbine generator comprising a lightning current transfer system of the aforementioned kind is provided.
摘要翻译：提供了一种用于风力涡轮发电机的雷电流传递系统，所述风力涡轮发电机包括转子，所述转子包括轮毂，叶片轴承，叶片和旋转器以及机舱，所述叶片可相对于所述轮毂和所述轮毂可相对于机舱旋转。为了有效地保护风力发电机免受雷击造成的损害，为了提高这种雷电流传输系统的使用灵活性，简便性，刚性，操作安全性和耐用性，特别适用于进入海上作业的风力发电机组，闪电电流传输系统包括包括第一和第二互补触点构件的第一电接触装置，第一接触构件被支撑在叶片处并与布置在叶片上的叶片导体装置电连接，第二接触构件被支撑在轮毂，旋转器或叶片轴承，其中第一和第二接触构件被布置成彼此电连接，连接到第一电接触装置的导电装置，连接到导电装置的第二电接触装置，并且包括第三和第四个互补联系人所述第三接触构件被支撑在所述轮毂处，所述旋转器或所述叶片轴承，所述第四接触构件被支撑在所述机舱处，其中所述第三接触构件和所述第四接触构件彼此电连接，所述雷电流传递系统提供用于从叶片到机舱的雷电流的电流路径，电流路径包括第一电接触装置，导电装置和第二电接触装置，第一接触构件布置在与叶片根部预定距离所述叶片根部通过所述叶片轴承安装到所述轮毂上，并且其中所述第一接触构件形成为连接到所述叶片导体装置的排出环，所述叶片导体装置由金属箔或金属网，其延伸在叶片的纵向延伸部的至少一部分上，其中雷电流传递系统是disp 驱动在旋转器内部和/或机舱内部，并且其中导电装置固定地安装在安装构件上，安装构件支撑在旋转器，轮毂或叶片轴承处或由旋转器形成，毂或刀片轴承。此外，提供了包括上述类型的雷电电流传输系统的风力涡轮发电机。

2. 发明申请

WO2013084276A1 WIND TURBINE 审中-公开
标题翻译：风力涡轮机
公开(公告)号：WO2013084276A1
公开(公告)日：2013-06-13
申请号：PCT/JP2011/006905
申请日：2011-12-09
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , EUROS ENTWICKLUNGSGESELLSCHAFT FUR WINDKRAFTANLAGEN MBH , SHIBATA, Masaaki , ICHINOSE, Hidekazu , ALWART, Jens , CREMER, Andreas
发明人： SHIBATA, Masaaki , ICHINOSE, Hidekazu , ALWART, Jens , CREMER, Andreas
IPC分类号： F03D11/00
CPC分类号： F03D17/00 , F03D80/40 , Y02E10/726
摘要： The invention relates to a wind turbine, comprising a tower, a nacelle, at least one blade with a tip end and a root end and monitoring means for monitoring the surface condition of the blade, wherein said monitoring means are located at the tower or at the nacelle and wherein said monitoring means are adapted to monitor the surface condition of at least substantially one entire side of the blade from its tip end to its root end.
摘要翻译：本发明涉及一种风力涡轮机，其包括塔架，机舱，至少一个具有尖端的叶片和根端，以及用于监测叶片的表面状况的监控装置，其中所述监测装置位于塔架处或所述机舱并且其中所述监测装置适于监测所述叶片的至少基本上整个侧面从其尖端到其根端的表面状态。

3. 发明申请

WO2013030874A1 METHOD OF MAINTAINING HYDRAULIC PUMP OF THE HYDRAULIC TRANSMISSION IN A RENEWABLE ENERGY TURBINE GENERATOR AND HYDRAULIC PUMP IN A RENEWABLE ENERGY TURBINE GENERATOR 审中-公开
标题翻译：可再生能源涡轮发电机中可再生能源涡轮发电机和液压泵液压变流器维修方法
公开(公告)号：WO2013030874A1
公开(公告)日：2013-03-07
申请号：PCT/JP2011/004824
申请日：2011-08-30
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , SALTER, Stephen , STEIN, Uwe , DODSON, Henry , FOX, Robert , ROBERTSON, Alasdair , MCGRATH, Tom
发明人： SALTER, Stephen , STEIN, Uwe , DODSON, Henry , FOX, Robert , ROBERTSON, Alasdair , MCGRATH, Tom
IPC分类号： F03D1/00 , F03D9/00 , F03D11/02 , F03D11/00 , F04B1/053
CPC分类号： F04B9/02 , F03D9/28 , F03D15/00 , F03D80/00 , F03D80/50 , F03D80/70 , F03D80/88 , F04B1/053 , Y02B10/30 , Y02E10/726 , Y02P70/523 , Y02P80/158 , Y10T29/49236
摘要： A hydraulic pump comprises (1) an outward ring (24), including demountable blocks (30) comprising piston cylinders (32), and an inward ring (21), comprising a ring cam (23), coupled through a drive shaft (8) to the blades of a turbine (4). To enable maintenance, the outward ring is decoupled from a torque limiting device (16, 17) and rotated relative to the inward ring. Demountable blocks are then removed from the outward ring using a crane (61) including a line (62) extending from above the centre of mass of the demountable block and including a resilient portion (66) so that although the crane supplies the majority of the force required to remove the demountable block, an operator provides some force, enabling the process to be controlled. The method is suitable for maintaining large hydraulic pumps in wind turbine nacelles (2).
摘要翻译：液压泵包括（1）向外的环（24），包括包括活塞气缸（32）的可拆卸块（30）和向内环（21），包括通过驱动轴（8）联接的环形凸轮（23））到涡轮（4）的叶片。为了实现维护，向外的环与扭矩限制装置（16,17）分离并相对于向内的环旋转。然后使用包括从可拆卸块的质心上方延伸的线（62）的起重机（61）将可拆卸块从所述向外环移除并且包括弹性部分（66），使得尽管起重机提供大部分拆卸可拆卸块所需的力，操作员提供一些力，使过程能够被控制。该方法适用于在风力发动机舱（2）中维护大型液压泵。

4. 发明申请

WO2013030873A1 RENEWABLE ENERGY TURBINE GENERATOR PROVIDED WITH HYDRAULIC PUMP WITH A SEGMENTED COVER AND METHOD TO ASSEMBLY THE PUMP 审中-公开
标题翻译：可再生能源涡轮发电机提供带有分隔盖的液压泵和组装泵的方法
公开(公告)号：WO2013030873A1
公开(公告)日：2013-03-07
申请号：PCT/JP2011/004823
申请日：2011-08-30
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , STEIN, Uwe , DODSON, Henry , ROBERTSON, Alasdair
发明人： STEIN, Uwe , DODSON, Henry , ROBERTSON, Alasdair
IPC分类号： F03D1/00 , F03D9/00 , F03D11/02 , F04B1/053
CPC分类号： F04B1/0538 , F03D9/25 , F03D9/28 , F03D15/00 , F03D15/20 , F03D80/50 , F04B1/0404 , F04B53/16 , Y02E10/72 , Y02P80/158
摘要： A large hydraulic radial piston pump (1) suitable to be driven by the turbine (4)of a wind turbine generator has a circular cover (40) formed from at least three cover segments (42). Underneath the cover segments a seal (46) in the form of a vulcanised rubber band extends around the entire periphery of the pump. Thus, the cover can be readily removed within the difficult to access location of a wind turbine nacelle, but a reliable seal can still be formed. An air pocket (60) outside the seal, or within the seal, facilitates pulsatile flow into the cylinders of the pump during operation.
摘要翻译：适于由风力涡轮发电机的涡轮机（4）驱动的大型液压径向柱塞泵（1）具有由至少三个盖段（42）形成的圆形盖（40）。在盖部分下方，硫化橡胶带形式的密封件（46）围绕泵的整个周边延伸。因此，可以在风力涡轮机舱的难以进入的位置容易地移除盖，但是仍然可以形成可靠的密封。密封件外侧或密封件内的气穴（60）有助于在操作期间脉动地进入泵的气缸。

5. 发明申请

WO2012073277A2 WIND TURBINE GENERATOR AND TIDAL CURRENT GENERATOR 审中-公开
标题翻译：风力涡轮发电机和TIDAL电流发电机
公开(公告)号：WO2012073277A2
公开(公告)日：2012-06-07
申请号：PCT/JP2010/006977
申请日：2010-11-30
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , TSUTSUMI, Kazuhisa , MAEKAWA, Atsushi , SHIMIZU, Masayuki , SALTER, Stephen , STEIN, Uwe , RAMPEN, William , FOX, Robert , KARSTENS, Hauke
发明人： TSUTSUMI, Kazuhisa , MAEKAWA, Atsushi , SHIMIZU, Masayuki , SALTER, Stephen , STEIN, Uwe , RAMPEN, William , FOX, Robert , KARSTENS, Hauke
IPC分类号： F03D9/00
CPC分类号： F03D9/28 , F03D9/17 , F03D9/25 , F03D15/00 , F03D15/20 , F05B2260/406 , F16H39/02 , Y02E10/28 , Y02E10/38 , Y02E10/72 , Y02E60/15 , Y02P80/158
摘要： An object of the present invention is to provide a wind turbine generator and a tidal current generator equipped with a hydraulic transmission with a combination of a hydraulic pump and a hydraulic motor and which has a superior productivity and maintainability. The wind turbine generator 1 has the hydraulic transmission 10 for transmitting the rotation energy of a main shaft 8 to a generator 20. The hydraulic transmission 10 includes a hydraulic pump 12 of variable displacement type which is driven by the main shaft 8, a hydraulic motor 14 of variable displacement type which is connected to the generator 20, and a high pressure oil line and a low pressure oil line which are arranged between the hydraulic pump 12 and the hydraulic motor 14. The hydraulic transmission 10 is at least partially constituted of a plurality of modules (M1 to M7).
摘要翻译：本发明的目的在于提供一种风力发电机和潮汐发电机，其配备有具有液压泵和液压马达的组合的液压变速器，并具有优异的生产率和可维护性。风力发电机1具有用于将主轴8的旋转能量传递到发电机20的液压变速器10.液压变速器10包括由主轴8驱动的可变排量型液压泵12，液压马达连接到发电机20的可变排量型的14，以及设置在液压泵12和液压马达14之间的高压油管线和低压油路。液压变速器10至少部分地由多个模块（M1至M7）。

6. 发明申请

WO2011148653A2 POWER GENERATING APPARATUS OF RENEWABLE ENERGY TYPE 审中-公开
标题翻译：可再生能源发电设备
公开(公告)号：WO2011148653A2
公开(公告)日：2011-12-01
申请号：PCT/JP2011/003002
申请日：2011-05-30
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , TSUTSUMI, Kazuhisa , SHIMIZU, Masayuki , MAEKAWA, Atsushi , NOGUCHI, Toshihide , KOREMATSU, Yasuhiro , CALDWELL, Niall , DUMNOV, Daniil , SALTER, Stephen , STEIN, Uwe , RAMPEN, William , FOX, Robert , ROBERTSON, Alasdair , LAIRD, Stephen , KARSTENS, Hauke , PAPPALA, Venkata
发明人： TSUTSUMI, Kazuhisa , SHIMIZU, Masayuki , MAEKAWA, Atsushi , NOGUCHI, Toshihide , KOREMATSU, Yasuhiro , CALDWELL, Niall , DUMNOV, Daniil , SALTER, Stephen , STEIN, Uwe , RAMPEN, William , FOX, Robert , ROBERTSON, Alasdair , LAIRD, Stephen , KARSTENS, Hauke , PAPPALA, Venkata
IPC分类号： F03D9/00
CPC分类号： F04B49/22 , F03C1/0403 , F03D9/28 , F03D15/00 , F03D15/20 , F04B1/0404 , F04B17/02 , F04B23/00 , F05B2260/406 , F16H39/02 , F16H61/4035 , Y02E10/722 , Y02E10/725 , Y02E60/17 , Y02P80/158
摘要： It is intended to provide a power generating apparatus of renewable energy type which can control the hydraulic transmission with high accuracy according to control signals. 1. The power generating apparatus of renewable energy type includes a rotating shaft 18 driven by the renewable energy source, a hydraulic pump 20 driven by the rotating shaft 18, a hydraulic motor driven by pressurized oil supplied from the hydraulic pump, a generator coupled to the hydraulic motor, a high pressure oil line 22 through which a discharge side of the hydraulic pump is in fluid communication with an intake side of the hydraulic motor, and a low pressure oil line 23 through which an intake side of the hydraulic pump is in fluid communication with a discharge side of the hydraulic motor. Each of the hydraulic pump 20 and the hydraulic motor includes a plurality of working chambers 53 each surrounded by a cylinder 51 and a piston 52, a high pressure manifold 60 including first branch channels 60A each connected to the working chambers and a first merging channel 60B connected to the high pressure oil line, the first branch channels joining together and merging into the first merging channel, a low pressure manifold 62 including second branch channels 62A each connected to the working chambers and a second merging channel 62B, the second branch channels joining together and merging into the second merging channel, high pressure valves 65 provided in the first branch channels of the high pressure manifold, low pressure valves respectively provided in the second branch channels of the low pressure manifold and a casing 50 accommodating them.
摘要翻译：旨在提供一种可再生能源的发电装置，其可以根据控制信号以高精度控制液压传动。 1.可再生能源发电装置包括由可再生能源驱动的旋转轴18，由旋转轴18驱动的液压泵20，由液压泵供给的加压油驱动的液压马达，发电机，液压马达，液压泵的排出侧与液压马达的进气侧流体连通的高压油路22以及液压泵的进气侧所在的低压油路23 与液压马达的排出侧流体连通。每个液压泵20和液压马达都包括多个工作室53，每个工作室53由缸51和活塞52围绕，高压歧管60包括各自连接到工作室的第一分支通道60A和第一合流通道60B 连接到高压油管线，第一分支通道连接并合并入第一合流通道，低压歧管62包括各自连接到工作室的第二分支通道62A和第二合流通道62B，第二分支通道连接一起并入第二合并通道，设置在高压歧管的第一分支通道中的高压阀65，分别设置在低压歧管的第二分支通道中的低压阀和容纳它们的壳体50。

7. 发明申请

WO2013080397A1 POWER GENERATING APPARATUS OF A RENEWABLE ENERGY TYPE AND OPERATION METHOD THEREOF 审中-公开
标题翻译：可再生能源的发电装置及其运行方法
公开(公告)号：WO2013080397A1
公开(公告)日：2013-06-06
申请号：PCT/JP2012/003667
申请日：2012-06-05
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , WAKASA, Tsuyoshi , CALDWELL, Niall , DUMNOV, Daniil
发明人： WAKASA, Tsuyoshi , CALDWELL, Niall , DUMNOV, Daniil
IPC分类号： F03D11/02 , F03D11/00 , F03D9/00 , F03D9/02 , F03D7/02
CPC分类号： F03D9/255 , F03D7/0284 , F03D9/28 , F05B2220/70642 , F05B2260/406 , F05B2270/1041 , F05B2270/506 , Y02E10/723 , Y02P80/158
摘要： A power generating apparatus of a renewable energy type, such as a wind turbine generator has a hydraulic transmission with a hydraulic pump driven by a rotating shaft coupled to a rotor and a hydraulic motor which in turn drives an electrical generator to provide power to an electricity grid. The transmission controller includes a torque limiter which limits the torque generated by the hydraulic motor to avoid generator pole slip which may arise due to a drop in the terminal voltage or field strength of the hydraulic motor, for example in response to a fault. The effect is that the apparatus can be operated without risk of pole slip even with the electrical generator connected directly to the electricity grid.
摘要翻译：可再生能源类型的发电装置，例如风力涡轮发电机，具有液压传动装置，液压泵由与转子耦合的旋转轴和液压马达驱动，液压马达又驱动发电机以向电力提供动力格。变速器控制器包括限制液压马达产生的扭矩的扭矩限制器，以避免由于液压马达的端子电压或场强的下降而引起的发电机极滑，例如响应故障。效果是，即使电发生器直接连接到电网，该装置也可以在没有极滑的危险的情况下运行。

8. 发明申请

WO2012073505A1 POWER GENERATING APPARATUS OF RENEWABLE ENERGY TYPE 审中-公开
标题翻译：可再生能源发电设备
公开(公告)号：WO2012073505A1
公开(公告)日：2012-06-07
申请号：PCT/JP2011/006695
申请日：2011-11-30
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , KAMEDA, Takuro , ROBERTSON, Alasdair , DODSON, Henry , UWE, Stein
发明人： KAMEDA, Takuro , ROBERTSON, Alasdair , DODSON, Henry , UWE, Stein
IPC分类号： F03D11/02 , F03D11/00 , F03D9/00
CPC分类号： F03D9/28 , F03D9/25 , F03D15/00 , F03D15/20 , F03D80/70 , F05B2260/406 , F05B2260/96 , Y02E10/726 , Y02P80/158
摘要： It is intended to provide a power generating apparatus of renewable energy type which is capable of reducing the concentrated load on the main shaft bearing and the pump housing caused by the bending of the rotating shaft and the load on the pressurized-oil piping caused by the relative displacement between the hydraulic pump and the hydraulic motor. The power generating apparatus of renewable energy type is provided with a hub rotated by the renewable energy received via a blade, a rotating shaft connected to the hub, a hydraulic pump 20 mounted on the rotating shaft and driven by rotation of the rotating shaft, a hydraulic motor 30 driven by pressurized oil from the hydraulic pump 20, a generator 35 coupled to the hydraulic motor 30, a support 7 providing reaction torque on the hydraulic pump 20 from the rotating shaft while allowing a displacement of the hydraulic pump 20 in a direction perpendicular to an axis of the rotating shaft, the hydraulic pump 20 being supported by a nacelle through the support, and a pressurized-oil piping 40 which is at least partially constituted of a flexible tube 43 and which connects an outlet port 24a of the hydraulic pump 20 to an inlet port 31 of the hydraulic motor 30 to supply the pressurized oil from the hydraulic pump 20 to the hydraulic motor 30.
摘要翻译：旨在提供一种可再生能源发电装置，其能够减少主轴轴承和泵壳体上由于旋转轴的弯曲和由加压油管道上的负载引起的集中负荷液压泵与液压马达的相对位移。可再生能源发电装置设置有通过叶片接收的可再生能量旋转的轮毂，连接到轮毂的旋转轴，安装在旋转轴上并由旋转轴旋转驱动的液压泵20，由液压泵20的加压油驱动的液压马达30，与液压马达30连接的发电机35，从旋转轴向液压泵20提供反作用扭矩的支承件7，同时允许液压泵20沿方向垂直于旋转轴的轴线，液压泵20由通过支撑件的机舱支撑，以及加压油管道40，其至少部分地由柔性管43构成，并连接液压的出口24a 泵20到达液压马达30的入口31，以将压力油从液压泵20供给液压马达30。

9. 发明申请

WO2012073504A3 POWER GENERATING APPARATUS OF RENEWABLE ENERGY TYPE AND OPERATION METHOD THEREOF 审中-公开
公开(公告)号：WO2012073504A3
公开(公告)日：2012-06-07
申请号：PCT/JP2011/006694
申请日：2011-11-30
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , HASHIMOTO, Jun , WAKASA, Tsuyoshi , BALDINI, Francesco , CALDWELL, Niall , TAYLOR, Jamie , DUMNOV, Daniil
发明人： HASHIMOTO, Jun , WAKASA, Tsuyoshi , BALDINI, Francesco , CALDWELL, Niall , TAYLOR, Jamie , DUMNOV, Daniil
IPC分类号： F03D9/00 , F03D7/02
摘要： It is intended to provide a power generating apparatus of renewable energy type and an operation method of the power generating apparatus, which can achieve both variable speed operation and grid connection without a frequency converting circuit and which uses a hydraulic transmission. In the power generating apparatus of renewable energy type 1, renewable energy received via a blade 4 is transmitted to a synchronous generator 20 via a rotating shaft 8 and a hydraulic transmission 10. The synchronous generator 20 is driven by a hydraulic motor 14 of the hydraulic transmission 10 to generate power. The synchronous generator 20 is connected to a grid without a frequency converting circuit and the power generated by the synchronous generator 20 is supplied to the grid 50. The power generating apparatus 1 is also provided with a transmission controller 40 which controls the hydraulic transmission 10. The transmission controller 40 controls the hydraulic transmission 10 in a normal operation mode to adjust displacement of each of a hydraulic pump 12and the hydraulic motor 14 such that the rotating shaft 8 rotates at a rotational speed that is variable with respect to flow speed of the renewable energy while keeping a rotational speed of the synchronous generator 20 at a synchronous speed based on frequency of the grid 50 during normal operation of the power generating apparatus.

10. 发明申请

WO2012073390A1 RENEWABLE ENERGY EXTRACTION DEVICE SUCH AS WIND TURBINE WITH HYDRAULIC TRANSMISSION 审中-公开
标题翻译：可再生能源提取装置如具有液压传动的风力涡轮机
公开(公告)号：WO2012073390A1
公开(公告)日：2012-06-07
申请号：PCT/JP2011/000920
申请日：2011-02-18
申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. , TAYLOR, Jamie , FIELDING, Michael , CALDWELL, Niall
发明人： TAYLOR, Jamie , FIELDING, Michael , CALDWELL, Niall
IPC分类号： F03D9/00 , F03D11/02
CPC分类号： H02P9/06 , F03D9/17 , F03D9/255 , F03D9/28 , F03D15/00 , F03D15/20 , F05B2260/406 , H02P9/006 , Y02E10/725 , Y02P80/158
摘要： A renewable energy extraction device, such as a wind turbine generator includes a turbine driving a hydraulic pump and a variable displacement hydraulic motor driving an electrical generator connected directly to an electricity grid. The hydraulic motor employs electronically controlled valves operated to select the net displacement of working chambers of the hydraulic motor on each successive cycle of working chamber volume. In the event of an electric grid fault causing the maximum absorbable torque of the electrical generator to collapse, the electronically controlled valves are controlled to substantially reduce the rate of displacement of working fluid by the hydraulic motor, rapidly reducing the torque exerted on the generator rotor. This has the benefit of avoiding pole slip which could otherwise cause serious damage. During the fault, the rate of displacement of working fluid by the hydraulic motor is controlled to maintain the phase and frequency of rotation of the generator rotor in synchrony with the electricity grid so that electricity generation can resume rapidly once the grid failure is rectified. Excess working fluid displaced by the hydraulic pump is stored in an accumulator. When the maximum amount has been stored pressurised fluid is discharged through a throttle to avoid damage but maintain pressure within the hydraulic transmission so that electricity generation can resume rapidly if the grid failure is rectified. If the fault persists, the turbine blades are feathered to reduce power input and if the fault persists for a further period of time, the energy extraction device shuts down.
摘要翻译：诸如风力涡轮发电机的可再生能源提取装置包括驱动液压泵的涡轮机和驱动直接连接到电网的发电机的可变排量液压马达。液压马达采用电子控制阀，用于在每个连续的工作室容积循环中选择液压马达的工作室的净位移。在电网故障导致发电机的最大吸收扭矩塌缩的情况下，电子控制阀被控制以显着降低由液压马达产生的工作流体的位移速率，从而迅速减小施加在发电机转子上的扭矩。这有利于避免极滑，否则可能会造成严重损坏。在故障期间，通过控制液压马达的工作流体的位移速度，使发电机转子的相位和频率与电力网同步，使电网故障排除后能够迅速恢复发电。由液压泵移位的多余的工作流体储存在蓄能器中。当最大量已被储存时，加压流体通过节流阀排出以避免损坏，但是保持液压变速器内的压力，从而如果电网故障被纠正，发电可以迅速恢复。如果故障仍然存在，涡轮机叶片会羽化以减少功率输入，如果故障持续一段时间，则能量提取装置关闭。

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