公开(公告)号：US20130170254A1

公开(公告)日：2013-07-04

申请号：US13824255

申请日：2011-12-14

申请人： Heinz-Hermann Letas

发明人： Heinz-Hermann Letas

IPC分类号： H02M5/42

CPC分类号： H02M5/42 ,  H02J3/1892 ,  H02P9/007 ,  Y02E10/763

摘要： Controlling a converter of a wind turbine is disclosed. The converter is connected to a rotor of a doubly fed asynchronous generator in order to feed electrical energy into an electric network. The converter comprises a network-side inverter, a generator-side inverter, and a controller, which outputs target values for demanded reactive power to at least one of the inverters. A reactive power target signal is determined for the portion that the network-side inverter contributes to the demanded reactive power QT, a slip signal is determined from the frequency of the network and the rotational speed of the generator, a gain value is calculated according to the slip signal, and the gain value is modified according to the reactive power target signal for the network-side inverter. The distribution of the reactive power between the two inverters is thus optimized over a wide operating range, not only at individual predetermined operating points.

摘要翻译： 公开了控制风力涡轮机的转换器。 转换器连接到双馈异步发电机的转子，以便将电能馈入电网。 转换器包括网络侧逆变器，发电机侧逆变器和控制器，其向至少一个逆变器输出所需无功功率的目标值。 确定网络侧逆变器对需求无功功率QT贡献的部分的无功功率目标信号，根据网络的频率和发电机的转速来确定滑移信号，增益值根据 滑差信号和增益值根据网络侧逆变器的无功功率目标信号进行修改。 因此，两个逆变器之间的无功功率的分布在宽的工作范围内被优化，不仅在各个预定的工作点。

公开(公告)号：US08390138B2

公开(公告)日：2013-03-05

申请号：US12515714

申请日：2007-11-20

申请人： Jens Fortmann ,  Heinz-Hermann Letas

发明人： Jens Fortmann ,  Heinz-Hermann Letas

IPC分类号： F03D7/00 ,  F03D9/00

CPC分类号： F03D7/0284 ,  F03D7/0272 ,  F03D7/048 ,  F05B2260/821 ,  F05B2270/107 ,  F05B2270/335 ,  F05B2270/404 ,  F05B2270/504 ,  H02J3/26 ,  H02J3/386 ,  Y02E10/723 ,  Y02E10/763 ,  Y02E40/50

摘要： A wind energy installation can include a generator which is driven by a rotor and generates electrical power in a multiphase manner for feeding into a network, a converter which is connected to the generator and to the network, and a control system which interacts with the converter and includes a negative sequence system regulation mechanism. The negative sequence system regulation mechanism can include a phase control module configured to determine an electrical variable of the negative sequence system according to the phase. Accordingly, an available current can be provided according to the operating situation for active power or idle power in the negative sequence system regulation mechanism. The negative sequence system regulation mechanism can thus help stabilize the network in the event of asymmetrical network conditions. Also, this relates to a correspondingly equipped wind park and an operating method.

摘要翻译： 风力设备可以包括由转子驱动并且以多相方式产生用于馈送到网络中的电力的发电机，连接到发电机和网络的转换器，以及与转换器相互作用的控制系统 并包括负序系统调节机制。 负序系统调节机构可以包括相位控制模块，其被配置为根据该相位确定负序系统的电变量。 因此，可以根据负序系统调节机构中的有功功率或空载功率的运行情况提供可用电流。 因此，负序系统调节机制可以有助于在网络不对称的情况下稳定网络。 此外，这涉及相应设备的风电场和操作方法。

公开(公告)号：US08344532B2

公开(公告)日：2013-01-01

申请号：US12600453

申请日：2008-05-14

申请人： Heinz-Hermann Letas

发明人： Heinz-Hermann Letas

IPC分类号： F03P9/04

CPC分类号： F03D7/0224 ,  F03D7/0268 ,  F05B2260/70 ,  F05B2260/76 ,  Y02E10/721 ,  Y02E10/723

摘要： A wind turbine includes a rotor having adjustable rotor blades for driving a generator and an adjusting device for the rotor blades provided with an actuator that comprises at least an excitation winding. The adjusting device includes a torque-reducing device that automatically reduces drag torque of the actuator. The torque-reducing device includes a current divider that switches the current through the excitation winding in such a manner that the current flows completely through the excitation coil when the motor is in operation and the current only partly flows through the excitation coil when coasting (slip operation). As a result, when coasting, the magnetization of the excitation winding is reduced about the adjusting device, whereby the increase of the speed torque characteristic curve can be determined, thus improving the ratio of the adjusting device when coasting.

摘要翻译： 风力涡轮机包括具有用于驱动发电机的可调节转子叶片的转子和用于具有至少包括励磁绕组的致动器的转子叶片的调节装置。 调节装置包括能够自动减小致动器的阻力矩的减速装置。 减速装置包括分流器，其以电流在运行中完全流过励磁线圈的方式切换电流通过励磁绕组，并且当滑行时电流仅部分地流过励磁线圈 操作）。 结果，当惯性滑动时，励磁绕组的磁化随着调节装置而减小，从而可以确定速度转矩特性曲线的增加，从而提高了惯性滑行时调节装置的比例。

公开(公告)号：US07741728B2

公开(公告)日：2010-06-22

申请号：US10573294

申请日：2004-09-27

申请人： Jens Fortmann ,  Heinz-Hermann Letas

发明人： Jens Fortmann ,  Heinz-Hermann Letas

IPC分类号： H02P9/00

CPC分类号： F03D7/028 ,  F03D9/255 ,  H02J3/1885 ,  H02J3/386 ,  Y02E10/723 ,  Y02E10/763 ,  Y02E40/32

摘要： A wind turbine with a rotor and a generator driven by, the rotor generates electrical power and delivers it to a power system. A control unit controlling the operation of the plant includes a reactive-power control module. The control unit includes also a determining device for a safe minimum active power. Furthermore, and a limiting device for the reactive-power control module, wherein the reactive power is limited to such a measure that the safe minimum active power is still available, taking into consideration the available power. As a result, the total current generated, apart from the active current required for the safe operation of the plant, can be fed into the power system as reactive current as backup in the case of a voltage drop.

摘要翻译： 具有转子和由发电机驱动的发电机的风力涡轮机，转子产生电力并将其输送到电力系统。 控制设备的操作的控制单元包括无功功率控制模块。 控制单元还包括用于安全最小有功功率的确定装置。 此外，还提供了一种用于无功功率控制模块的限制装置，其中无功功率被限制为考虑到可用功率的安全最小有功功率仍然可用的这种措施。 结果，除了工厂安全运行所需的有效电流之外，产生的总电流可作为无电压电流馈送到电力系统中，作为电压降的情况下的备用电流。

公开(公告)号：US20090001726A1

公开(公告)日：2009-01-01

申请号：US12280529

申请日：2007-02-23

申请人： Karsten Warfen ,  Heinz-Hermann Letas

发明人： Karsten Warfen ,  Heinz-Hermann Letas

IPC分类号： H02P9/04

CPC分类号： F03D7/0224 ,  F05B2260/76 ,  F05B2270/1074 ,  H02H3/18 ,  H02J9/06 ,  Y02B10/72 ,  Y02E10/721 ,  Y02E10/723 ,  Y02E10/766

摘要： A wind energy installation includes a tower provided with rotor blades that are adjusted using a servomotor connected to a pitch circuit and an emergency circuit. During normal operation the rotor blades are actuated by the pitch circuit and during emergency operation are actuated by the emergency circuit. The emergency circuit has an electric energy store, a switching device, connection lines to the servomotor and a protection device which includes comprises a power flow detector module (60) designed for determining whether electric power flows into or from the servomotor and a discharge module designed to limit the voltage and/or current in the emergency circuit in the case of a power flow from the servomotor.

摘要翻译： 风力设备包括设有转子叶片的塔架，其使用连接到俯仰电路和紧急电路的伺服电机进行调节。 在正常操作期间，转子叶片由俯仰电路致动，并且在紧急操作期间由应急电路致动。 应急电路具有电能存储器，开关装置，与伺服电动机的连接线路和保护装置，该保护装置包括：功率流量检测器模块（60），其被设计用于确定电力是否流入伺服电动机，以及设计的放电模块 在来自伺服电动机的动力流动的情况下，限制应急电路中的电压和/或电流。

公开(公告)号：US08934270B2

公开(公告)日：2015-01-13

申请号：US13824255

申请日：2011-12-14

申请人： Heinz-Hermann Letas

发明人： Heinz-Hermann Letas

IPC分类号： H02M5/458 ,  H02M5/42 ,  H02J3/18 ,  H02P9/00

CPC分类号： H02M5/42 ,  H02J3/1892 ,  H02P9/007 ,  Y02E10/763

摘要： Controlling a converter of a wind turbine is disclosed. The converter is connected to a rotor of a doubly fed asynchronous generator in order to feed electrical energy into an electric network. The converter comprises a network-side inverter, a generator-side inverter, and a controller, which outputs target values for demanded reactive power to at least one of the inverters. A reactive power target signal is determined for the portion that the network-side inverter contributes to the demanded reactive power QT, a slip signal is determined from the frequency of the network and the rotational speed of the generator, a gain value is calculated according to the slip signal, and the gain value is modified according to the reactive power target signal for the network-side inverter. The distribution of the reactive power between the two inverters is thus optimized over a wide operating range, not only at individual predetermined operating points.

摘要翻译： 公开了控制风力涡轮机的转换器。 转换器连接到双馈异步发电机的转子，以便将电能馈入电网。 转换器包括网络侧逆变器，发电机侧逆变器和控制器，其向至少一个逆变器输出所需无功功率的目标值。 确定网络侧逆变器对需求无功功率QT贡献的部分的无功功率目标信号，根据网络的频率和发电机的转速来确定滑移信号，增益值根据 滑差信号和增益值根据网络侧逆变器的无功功率目标信号进行修改。 因此，两个逆变器之间的无功功率的分布在宽的工作范围内被优化，不仅在各个预定的工作点。

公开(公告)号：US08405237B2

公开(公告)日：2013-03-26

申请号：US12280529

申请日：2007-02-23

申请人： Karsten Warfen ,  Heinz-Hermann Letas

发明人： Karsten Warfen ,  Heinz-Hermann Letas

IPC分类号： F03D9/00 ,  H02P9/04 ,  B64C11/00

CPC分类号： F03D7/0224 ,  F05B2260/76 ,  F05B2270/1074 ,  H02H3/18 ,  H02J9/06 ,  Y02B10/72 ,  Y02E10/721 ,  Y02E10/723 ,  Y02E10/766

摘要： A wind energy installation includes a tower provided with rotor blades that are adjusted using a servomotor connected to a pitch circuit and an emergency circuit. During normal operation the rotor blades are actuated by the pitch circuit and during emergency operation are actuated by the emergency circuit. The emergency circuit has an electric energy store, a switching device, connection lines to the servomotor and a protection device which includes comprises a power flow detector module (60) designed for determining whether electric power flows into or from the servomotor and a discharge module designed to limit the voltage and/or current in the emergency circuit in the case of a power flow from the servomotor.

摘要翻译： 风力设备包括设有转子叶片的塔架，其使用连接到俯仰电路和紧急电路的伺服电机进行调节。 在正常操作期间，转子叶片由俯仰电路致动，并且在紧急操作期间由应急电路致动。 应急电路具有电能存储器，开关装置，与伺服电动机的连接线路和保护装置，该保护装置包括：功率流量检测器模块（60），其被设计用于确定电力是否流入伺服电动机，以及设计的放电模块 在来自伺服电动机的动力流动的情况下，限制应急电路中的电压和/或电流。

公开(公告)号：US20100320762A1

公开(公告)日：2010-12-23

申请号：US12735853

申请日：2009-02-18

申请人： Heinz-Hermann Letas ,  Jens Fortmann

发明人： Heinz-Hermann Letas ,  Jens Fortmann

IPC分类号： F03D9/00 ,  H02P9/48

CPC分类号： H02J3/18 ,  F03D9/25 ,  F03D9/255 ,  H02J3/1892 ,  H02J3/386 ,  H02M5/4585 ,  H02P9/007 ,  H02P2101/15 ,  H02P2207/01 ,  Y02E10/725 ,  Y02E10/763 ,  Y02E40/30

摘要： A method for controlling a converter of a wind energy installation. The converter is connected to the rotor of a doubly-fed asynchronous generator in order to feed electrical power into an electrical grid and comprises a generator-side inverter, a grid-side inverter, and at least one converter regulator for regulating and/or controlling current output from at least one of the inverters to the doubly-fed asynchronous generator and/or to the electrical grid. The method includes detecting a change in output real power, determining whether the detected change satisfies a predefined condition, and changing a nominal value of reactive power to be output in an opposite sense to a change in real power at the grid-side inverter and in a same sense as the generator-side inverter when the predefined condition is satisfied.

摘要翻译： 一种用于控制风能设备的转换器的方法。 转换器连接到双馈异步发电机的转子，以将电力馈送到电网中，并且包括发电机侧逆变器，电网侧逆变器和用于调节和/或控制的至少一个转换器调节器 从至少一个逆变器输出到双馈异步发电机和/或电网。 该方法包括检测输出有功功率的变化，确定检测到的变化是否满足预定条件，以及将无功功率的额定值改变为与电网侧逆变器的有功功率的变化相反的方式输出 当满足预定义条件时与发生器侧逆变器相同的感觉。

公开(公告)号：US20100091417A1

公开(公告)日：2010-04-15

申请号：US12569590

申请日：2009-09-29

申请人： Heinz-Hermann LETAS

发明人： Heinz-Hermann LETAS

IPC分类号： H02H7/06 ,  H02H9/04

CPC分类号： F03D7/0284 ,  F03D9/255 ,  F03D9/257 ,  F05B2240/96 ,  F05B2270/502 ,  F05B2270/504 ,  H02H9/041 ,  Y02E10/72

摘要： An overvoltage protective device for wind energy installations is designed for connection to a connecting line having at least one inductance between a wind energy installation and a grid system. The overvoltage protective device has a controller which operates a limiting unit as a function of an overvoltage at the wind energy installation. The limiting unit comprises a spur line having an induction module and a power tapping module which is provided with a switching unit. This yields a second power strand which can accept a considerable reactive current if necessary, thus increasing the voltage drop across the inductance, as a result of which the voltage acting on the wind energy installation is reduced.

摘要翻译： 用于风能设备的过电压保护装置设计用于连接到在风能设备和电网系统之间具有至少一个电感的连接线。 过电压保护装置具有控制器，该控制器作为风能设备的过电压的功能来操作限制单元。 限制单元包括具有感应模块的支线和配备有开关单元的功率抽头模块。 这产生了第二功率线，其可以在必要时接受相当大的无功电流，从而增加电感两端的电压降，结果作用在风能装置上的电压降低。

公开(公告)号：US20100052322A1

公开(公告)日：2010-03-04

申请号：US12515714

申请日：2007-11-20

申请人： Jens Fortmann ,  Heinz-Hermann Letas

发明人： Jens Fortmann ,  Heinz-Hermann Letas

IPC分类号： F03D7/00 ,  F03D9/00

CPC分类号： F03D7/0284 ,  F03D7/0272 ,  F03D7/048 ,  F05B2260/821 ,  F05B2270/107 ,  F05B2270/335 ,  F05B2270/404 ,  F05B2270/504 ,  H02J3/26 ,  H02J3/386 ,  Y02E10/723 ,  Y02E10/763 ,  Y02E40/50

摘要： A wind energy installation can include a generator which is driven by a rotor and generates electrical power in a multiphase manner for feeding into a network, a converter which is connected to the generator and to the network, and a control system which interacts with the converter and includes a negative sequence system regulation mechanism. The negative sequence system regulation mechanism can include a phase control module configured to determine an electrical variable of the negative sequence system according to the phase. Accordingly, an available current can be provided according to the operating situation for active power or idle power in the negative sequence system regulation mechanism. The negative sequence system regulation mechanism can thus help stabilize the network in the event of asymmetrical network conditions. Also, this relates to a correspondingly equipped wind park and an operating method.

摘要翻译： 风力设备可以包括由转子驱动并且以多相方式产生用于馈送到网络中的电力的发电机，连接到发电机和网络的转换器，以及与转换器相互作用的控制系统 并包括负序系统调节机制。 负序系统调节机构可以包括相位控制模块，其被配置为根据该相位确定负序系统的电变量。 因此，可以根据负序系统调节机构中的有功功率或空载功率的运行情况提供可用电流。 因此，负序系统调节机制可以有助于在网络不对称的情况下稳定网络。 此外，这涉及相应设备的风电场和操作方法。