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1. 发明申请

WO2010031651A2 AN ASYNCHRONOUS POWER GENERATOR FOR A WIND TURBINE 审中-公开
标题翻译：用于风力发电机的异步发电机
公开(公告)号：WO2010031651A2
公开(公告)日：2010-03-25
申请号：PCT/EP2009/060702
申请日：2009-08-19
申请人： SIEMENS AKTIENGESELLSCHAFT , BIRKEMOSE, Bo , EGEDAL, Per , GROENDAHL, Erik
发明人： BIRKEMOSE, Bo , EGEDAL, Per , GROENDAHL, Erik
IPC分类号： H02P9/00 , H02P9/02
CPC分类号： H02P9/007 , H02P9/02 , H02P2101/15
摘要： An asynchronous power generator for a wind turbine, comprising a voltage supply and a stator with stator coils supplied with an alternating voltage by the voltage supply, wherein the voltage supply is configured to adjust the voltage supplied to the stator coils based on the output power generated by the wind turbine, and a method of voltage control therefor.
摘要翻译：一种用于风力涡轮机的异步发电机，包括电压源和定子，其中定子线圈由电压源提供交流电压，其中电压源被配置为基于产生的输出功率来调节提供给定子线圈的电压通过风力涡轮机，以及用于其的电压控制方法。

2. 发明申请

WO2009000787A3 MONITORING OF BLADE FREQUENCIES OF A WIND TURBINE 审中-公开
标题翻译：监测风力涡轮机的叶片频率
公开(公告)号：WO2009000787A3
公开(公告)日：2008-12-31
申请号：PCT/EP2008/057923
申请日：2008-06-23
申请人： SIEMENS AKTIENGESELLSCHAFT , BIRKEMOSE, Bo , EGEDAL, Per
发明人： BIRKEMOSE, Bo , EGEDAL, Per
IPC分类号： F03D11/00
摘要： The present invention relates to a method for monitoring blade frequencies of a wind turbine and a monitoring system for performing the method. By the invention an accelerometer or G-sensor is placed into the nacelle of a wind turbine and thereby measuring the vibrations of the nacelle. To extract the vibration signals originating from each blade, the vibration signals are combined with the measuring signals from the azimuth angle sensor (rotating angle), which is normally used for pitch control. To further extract each blade frequency a Fast Fourier Transformation (FFT) is used on the modulated G-sensor signals. To further monitor a severe and alarming change in each blade frequency each blade frequency is compared to the other blade frequencies and an alarm is set if a given level is reached.
摘要翻译：本发明涉及一种用于监测风力涡轮机的叶片频率的方法以及用于执行该方法的监测系统。通过本发明，加速度计或G传感器被放置在风力涡轮机的机舱中并由此测量机舱的振动。为了提取来自每个叶片的振动信号，将振动信号与来自方位角传感器的测量信号（旋转角度）结合，其通常用于俯仰控制。为了进一步提取每个叶片频率，在调制的G传感器信号上使用快速傅里叶变换（FFT）。为了进一步监测每个叶片频率的严重和令人担忧的变化，将每个叶片频率与其他叶片频率进行比较，并且如果达到给定水平则设置警报。

3. 发明申请

WO2009047121A3 MONITORING OF BLADE FREQUENCIES OF A WIND TURBINE 审中-公开
公开(公告)号：WO2009047121A3
公开(公告)日：2009-04-16
申请号：PCT/EP2008/062766
申请日：2008-09-24
申请人： SIEMENS AKTIENGESELLSCHAFT , BIRKEMOSE, Bo , STIESDAL, Henrik , VINTHER, Soeren
发明人： BIRKEMOSE, Bo , STIESDAL, Henrik , VINTHER, Soeren
IPC分类号： F03D11/00
摘要： By the invention one or more bolt gauges (6) each with a built-in load cell (LC, not shown) are positioned on a blade bolt or a bearing bolt between a pitch bearing and a nut and tensioned by the nut at the inside or the outside of a hub of a wind turbine. The bolt gauge then outputs a signal descending both from the tension from the bolt/nut connection and the tension from the blade when the blade is vibrated due to wind forces and the rotation of the blade when the hub of the wind turbine is rotating. Further a severe and alarming change in each blade frequency is monitored as each blade frequency is compared to the other blade frequencies and an alarm is set and/or the wind turbine is stopped if a given level is reached.

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