-
1.发明申请公开(公告)号：US20120099233A1
公开(公告)日：2012-04-26
申请号：US13280128
申请日：2011-10-24
摘要： A method and a device for supervising the sensitivity of a protection function in an electrical power system including a metering device for measuring values of a feature, said protection function being configured to initialize an action based on a test value and a threshold value for the feature, wherein said test value is either a measured value or derived from the said measured values, the device includes a computing unit configured to receive the test values and, repeatedly during the operation of the protection function, to calculate a mean value and a deviation of the test values, to determine the probability of a false action based on the calculated mean value, the threshold value and the calculated deviation, and to indicate that the sensitivity is too high when the probability of a false action exceeds a first limit value for the probability of a false action.
摘要翻译： 一种用于监视包括用于测量特征值的计量装置的电力系统中的保护功能的灵敏度的方法和装置，所述保护功能被配置为基于所述特征的测试值和阈值初始化动作 ，其中所述测试值是测量值或从所述测量值导出，所述设备包括被配置为接收所述测试值并且在所述保护功能的操作期间重复地计算平均值和偏差的计算单元 测试值，以基于计算的平均值，阈值和计算的偏差来确定错误动作的概率，并且当虚假动作的概率超过第一限制值时，表示灵敏度太高 误报的概率。
-
2.发明授权公开(公告)号：US08472156B2
公开(公告)日：2013-06-25
申请号：US13280128
申请日：2011-10-24
IPC分类号： H02H3/00
摘要： A method and a device for supervising the sensitivity of a protection function in an electrical power system including a metering device for measuring values of a feature, said protection function being configured to initialize an action based on a test value and a threshold value for the feature, wherein said test value is either a measured value or derived from the said measured values, the device includes a computing unit configured to receive the test values and, repeatedly during the operation of the protection function, to calculate a mean value and a deviation of the test values, to determine the probability of a false action based on the calculated mean value, the threshold value and the calculated deviation, and to indicate that the sensitivity is too high when the probability of a false action exceeds a first limit value for the probability of a false action.
摘要翻译： 一种用于监视包括用于测量特征值的计量装置的电力系统中的保护功能的灵敏度的方法和装置，所述保护功能被配置为基于所述特征的测试值和阈值来初始化动作 ，其中所述测试值是测量值或从所述测量值导出，所述设备包括被配置为接收所述测试值并且在所述保护功能的操作期间重复地计算平均值和偏差的计算单元 测试值，以基于计算的平均值，阈值和计算的偏差来确定错误动作的概率，并且当虚假动作的概率超过第一限制值时，表示灵敏度太高 误报的概率。
-
公开(公告)号：US09041383B2
公开(公告)日：2015-05-26
申请号：US14030456
申请日：2013-09-18
申请人： Tord Bengtsson , Henrik Johansson , Stefan Roxenborg , Joseph Menezes , Zoltan Nagy , Mikael Sehlstedt
发明人： Tord Bengtsson , Henrik Johansson , Stefan Roxenborg , Joseph Menezes , Zoltan Nagy , Mikael Sehlstedt
CPC分类号： H01F27/42
摘要： A method for linearizing voltage transmission through a transformer including a magnetic core and, input and output windings. A measurement signal is supplied to the input winding at a first frequency and an output signal is measured at the output winding of the transformer, wherein the voltage of the measurement signal may be so low that the transformer operates in a non-linear region. The method includes, for a conditioning signal, selecting a second frequency different from the first frequency, defining an amplitude value of the conditioning signal and supplying the conditioning signal to the input winding at the second frequency with the defined amplitude value so that the transformer operates in its linear region.
摘要翻译： 通过包括磁芯和输入和输出绕组的变压器线性化电压传输的方法。 测量信号以第一频率提供给输入绕组，并且在变压器的输出绕组处测量输出信号，其中测量信号的电压可能非常低以致变压器在非线性区域中工作。 该方法包括：对于调节信号，选择不同于第一频率的第二频率，定义调节信号的振幅值，并以定义的振幅值将调理信号以第二频率提供给输入绕组，使变压器工作 在其线性区域。
-
4.发明申请Method And Device For Enhancing The Reliability Of Generator Ground Fault Detection On A Rotating Electrical Machine 有权用于提高发电机接地故障检测在旋转电机上的可靠性的方法和装置公开(公告)号：US20130335097A1
公开(公告)日：2013-12-19
申请号：US13972305
申请日：2013-08-21
IPC分类号： G01R31/02
CPC分类号： G01R31/025 , G01R27/18 , G01R31/343 , H02H1/003
摘要： A method for enhancing the reliability of generator ground fault detection based on a signal injection scheme, wherein the generator includes a winding. The method includes injecting a test signal at a predefined frequency to the winding, measuring an electrical quantity of a response signal in the winding resulted from the injected test signal, and detecting a ground fault based on the measured value of the electrical quantity. The method further includes continuously determining the frequency of the response signal, and discarding the present measured value corresponding to the determined frequency when the determined frequency deviates from the predefined frequency with a first threshold value.
摘要翻译： 一种用于增强基于信号注入方案的发电机接地故障检测的可靠性的方法，其中所述发电机包括绕组。 该方法包括将预定频率的测试信号注入到绕组，测量由注入的测试信号产生的绕组中的响应信号的电量，并且基于电量的测量值检测接地故障。 该方法还包括连续地确定响应信号的频率，以及当所确定的频率偏离具有第一阈值的预定频率时，丢弃对应于所确定的频率的当前测量值。
-
5.发明授权Method and device for enhancing the reliability of generator ground fault detection on a rotating electrical machine 有权用于提高旋转电机发电机接地故障检测可靠性的方法和装置公开(公告)号：US09018960B2
公开(公告)日：2015-04-28
申请号：US13972305
申请日：2013-08-21
CPC分类号： G01R31/025 , G01R27/18 , G01R31/343 , H02H1/003
摘要： A method for enhancing the reliability of generator ground fault detection based on a signal injection scheme, wherein the generator includes a winding. The method includes injecting a test signal at a predefined frequency to the winding, measuring an electrical quantity of a response signal in the winding resulted from the injected test signal, and detecting a ground fault based on the measured value of the electrical quantity. The method further includes continuously determining the frequency of the response signal, and discarding the present measured value corresponding to the determined frequency when the determined frequency deviates from the predefined frequency with a first threshold value.
摘要翻译： 一种用于增强基于信号注入方案的发电机接地故障检测的可靠性的方法，其中所述发电机包括绕组。 该方法包括将预定频率的测试信号注入绕组，测量由注入的测试信号产生的绕组中的响应信号的电量，并且基于电量的测量值检测接地故障。 该方法还包括连续地确定响应信号的频率，以及当所确定的频率偏离具有第一阈值的预定频率时，丢弃对应于所确定的频率的当前测量值。
-
公开(公告)号：US09075099B2
公开(公告)日：2015-07-07
申请号：US14002929
申请日：2011-03-03
IPC分类号： G01R31/14 , G01R31/06 , G01R31/34 , H02H3/00 , G01R31/02 , H02H1/00 , H02H3/08 , H02H7/00 , H02H7/08
CPC分类号： G01R31/025 , G01R31/343 , H02H1/003 , H02H3/08 , H02H7/00 , H02H7/0822
摘要： A method for adapting a ground fault detection to a change of an electrical machine condition, wherein the machine includes a winding. The electrical machine is in a first machine condition, a first reference value being defined for measured values of an electrical quantity. The ground fault detection includes continuously measuring the electrical quantity in the winding and detecting a ground fault based on the measured values of the electrical quantity and the first reference value. The method includes receiving a signal, detecting a change of machine condition based on the received signal, and changing to a second reference value for the measured values of the electrical quantity, the second reference value being different from the first reference value when the change of machine condition is detected.
摘要翻译： 一种用于使接地故障检测适应于电机状态变化的方法，其中所述机器包括绕组。 电机处于第一机器状态，为电量的测量值定义第一参考值。 接地故障检测包括连续测量绕组中的电量，并根据电量和第一参考值的测量值检测接地故障。 该方法包括接收信号，基于接收到的信号检测机器状态的变化，并且改变为电量的测量值的第二参考值，当第二参考值与第一参考值不同时，第二参考值不同于第一参考值 检测到机器状况。
-
公开(公告)号：US20140015510A1
公开(公告)日：2014-01-16
申请号：US14030456
申请日：2013-09-18
申请人： Tord Bengtsson , Henrik Johansson , Stefan Roxenborg , Joseph Menezes , Zoltan Nagy , Mikael Sehlstedt
发明人： Tord Bengtsson , Henrik Johansson , Stefan Roxenborg , Joseph Menezes , Zoltan Nagy , Mikael Sehlstedt
IPC分类号： H01F27/42
CPC分类号： H01F27/42
摘要： A method for linearizing voltage transmission through a transformer including a magnetic core and, input and output windings. A measurement signal is supplied to the input winding at a first frequency and an output signal is measured at the output winding of the transformer, wherein the voltage of the measurement signal may be so low that the transformer operates in a non-linear region. The method includes, for a conditioning signal, selecting a second frequency different from the first frequency, defining an amplitude value of the conditioning signal and supplying the conditioning signal to the input winding at the second frequency with the defined amplitude value so that the transformer operates in its linear region.
摘要翻译： 通过包括磁芯和输入和输出绕组的变压器线性化电压传输的方法。 测量信号以第一频率提供给输入绕组，并且在变压器的输出绕组处测量输出信号，其中测量信号的电压可能非常低以致变压器在非线性区域中工作。 该方法包括：对于调节信号，选择不同于第一频率的第二频率，定义调节信号的振幅值，并以定义的振幅值将调理信号以第二频率提供给输入绕组，使变压器工作 在其线性区域。
-
公开(公告)号：US20130335098A1
公开(公告)日：2013-12-19
申请号：US14002929
申请日：2011-03-03
IPC分类号： G01R31/02
CPC分类号： G01R31/025 , G01R31/343 , H02H1/003 , H02H3/08 , H02H7/00 , H02H7/0822
摘要： A method for adapting a ground fault detection to a change of an electrical machine condition, wherein the machine includes a winding. The electrical machine is in a first machine condition, a first reference value being defined for measured values of an electrical quantity. The ground fault detection includes continuously measuring the electrical quantity in the winding and detecting a ground fault based on the measured values of the electrical quantity and the first reference value. The method includes receiving a signal, detecting a change of machine condition based on the received signal, and changing to a second reference value for the measured values of the electrical quantity, the second reference value being different from the first reference value when the change of machine condition is detected.
摘要翻译： 一种用于使接地故障检测适应于电机状态变化的方法，其中所述机器包括绕组。 电机处于第一机器状态，为电量的测量值定义第一参考值。 接地故障检测包括连续测量绕组中的电量，并根据电量和第一参考值的测量值检测接地故障。 该方法包括接收信号，基于接收到的信号检测机器状态的变化，并且改变为电量的测量值的第二参考值，当第二参考值与第一参考值不同时，第二参考值不同于第一参考值 检测到机器状况。
-
公开(公告)号：US09527086B2
公开(公告)日：2016-12-27
申请号：US14124258
申请日：2012-05-29
申请人： Henrik Johansson , Martin Nilsson
发明人： Henrik Johansson , Martin Nilsson
IPC分类号： B02C2/04
摘要： A gyratory crusher includes a frame and a crushing head which is arranged rotatably about a substantially vertical shaft. The frame has an upper frame portion and a lower frame portion. The lower frame portion includes a hub. The hub has a centralized arranged through hole with a center axis extending through the hole and the hub. The hole is arranged to cooperate with the shaft being rotatably arranged in the hole. The hub is connected by arms to the lower frame portion and includes a drive ring pocket.
摘要翻译： 旋转式破碎机包括框架和破碎头，其围绕基本垂直的轴可旋转地布置。 框架具有上框架部分和下框架部分。 下框架部分包括轮毂。 轮毂具有集中布置的通孔，中心轴线延伸穿过孔和轮毂。 孔设置成与可旋转地布置在孔中的轴配合。 轮毂通过臂连接到下框架部分并且包括驱动环口袋。
-
公开(公告)号：USD580994S1
公开(公告)日：2008-11-18
申请号：US29306863
申请日：2008-04-17
申请人： Mats Johansson , Henrik Johansson
设计人： Mats Johansson , Henrik Johansson
-
-
-
-
-
-
-
-
-
搜索结果
42 条记录 (耗时 0.016 秒)
