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9 条记录 (耗时 0.031 秒)

    Inter-area oscillation detection
    3.
    发明授权
    Inter-area oscillation detection 有权
    区域间振荡检测

    公开(公告)号：US09350163B2

    公开(公告)日：2016-05-24

    申请号：US13277071

    申请日：2011-10-19

    申请人： Zhiying Zhang ,  Ilia Voloh ,  Jorge Eduardo Cardenas Medina

    发明人： Zhiying Zhang ,  Ilia Voloh ,  Jorge Eduardo Cardenas Medina

    IPC分类号： G01R15/00 ,  G01R21/00 ,  H02H7/28 ,  H02H3/04

    CPC分类号： H02H7/28 ,  H02H3/046 ,  H02H3/048

    摘要： A device includes interface circuitry. The interface circuitry receives first input signals related to measurements of characteristics of electricity passing through a first power line. The device includes filtering circuitry that filters the first input signals to generate filtered data. The device also includes a processor that estimates an oscillation frequency of the filtered data via a time-domain frequency estimation method.

    摘要翻译： 一个设备包括接口电路。 接口电路接收与通过第一电力线的电特性的测量相关的第一输入信号。 该装置包括对第一输入信号进行滤波以产生滤波数据的滤波电路。 该装置还包括经由时域频率估计方法估计滤波后数据的振荡频率的处理器。

    INTER-AREA OSCILLATION DETECTION
    4.
    发明申请
    INTER-AREA OSCILLATION DETECTION 有权
    区域内振荡检测

    公开(公告)号：US20130100564A1

    公开(公告)日：2013-04-25

    申请号：US13277071

    申请日：2011-10-19

    申请人： Zhiying Zhang ,  llia Voloh ,  Jorge Eduardo Cardenas Medina

    发明人： Zhiying Zhang ,  llia Voloh ,  Jorge Eduardo Cardenas Medina

    IPC分类号： H02H3/00 ,  G01D1/14

    CPC分类号： H02H7/28 ,  H02H3/046 ,  H02H3/048

    摘要： A device includes interface circuitry. The interface circuitry receives first input signals related to measurements of characteristics of electricity passing through a first power line. The device includes filtering circuitry that filters the first input signals to generate filtered data. The device also includes a processor that estimates an oscillation frequency of the filtered data via a time-domain frequency estimation method.

    摘要翻译： 一个设备包括接口电路。 接口电路接收与通过第一电力线的电特性的测量相关的第一输入信号。 该装置包括对第一输入信号进行滤波以产生滤波数据的滤波电路。 该装置还包括经由时域频率估计方法估计滤波数据的振荡频率的处理器。

    Apparatus for preventing thermal damage to an electrical power transformer
    8.
    发明授权
    Apparatus for preventing thermal damage to an electrical power transformer 失效
    用于防止对电力变压器的热损伤的装置

    公开(公告)号：US06424266B1

    公开(公告)日：2002-07-23

    申请号：US09617761

    申请日：2000-07-17

    申请人： Mark Anthony Weekes ,  Robert George Coish ,  Zhiying Zhang ,  Glenn William Swift

    发明人： Mark Anthony Weekes ,  Robert George Coish ,  Zhiying Zhang ,  Glenn William Swift

    IPC分类号： G08B1700

    CPC分类号： H02H6/005 ,  H02H5/06 ,  H02H7/04

    摘要： An apparatus for monitoring and controlling the operation of an electrical power transformer includes a processor with input transducers for providing to the processor inputs indicative of electrical current in a winding of the transformer and ambient temperature outside the transformer. The processor is arranged using an algorithm based upon heat transfer to repeatedly calculate a first prediction, based upon the present values of electrical current and ambient temperature, of a time period before the hot spot temperature exceeds a pre-set allowable maximum and a second prediction, based upon the current value of power, of a time period before the accumulated loss of life exceeds a pre-set allowable maximum. If the shorter time period of the two calculations is less than a pre-set value, for example one half hour, the processor generates an alarm signal and a display counting down the time remaining in the period, together with a second alarm signal at a shorter second time of for example one quarter hour.

    摘要翻译： 用于监测和控制电力变压器的操作的装置包括具有输入换能器的处理器，用于向处理器提供指示变压器的绕组中的电流和变压器外部的环境温度的输入。 处理器使用基于热传递的算法来布置，以基于热点温度超过预设允许最大值和第二预测之前的时间段的电流和环境温度的当前值重复计算第一预测 基于当前的功率值，在累积的寿命损失超过预定的允许最大值之前的时间段内。 如果两次计算的较短时间段小于预定值（例如一个半小时），则处理器产生一个报警信号和一个在该周期内剩余时间的下降的显示以及第二个报警信号 较短的第二次例如四分之一小时。

    Apparatus and method for predicting an overload trip for an electrical power transformer
    9.
    发明授权
    Apparatus and method for predicting an overload trip for an electrical power transformer 失效
    用于预测电力变压器过载跳闸的装置和方法

    公开(公告)号：US06727821B2

    公开(公告)日：2004-04-27

    申请号：US10093967

    申请日：2002-03-11

    申请人： Mark Anthony Weekes ,  Robert George Coish ,  Zhiying Zhang ,  Glenn William Swift

    发明人： Mark Anthony Weekes ,  Robert George Coish ,  Zhiying Zhang ,  Glenn William Swift

    IPC分类号： G08B1700

    CPC分类号： H02H6/005 ,  H02H5/06 ,  H02H7/04

    摘要： An apparatus for monitoring and controlling the operation of an electrical power transformer includes a processor with input transducers for providing to the processor inputs indicative of electrical current in a winding of the transformer and ambient temperature outside the transformer. The processor is arranged using an algorithm based upon heat transfer to repeatedly calculate a first prediction, based upon the present values of electrical current and ambient temperature, of a time period before the hot spot temperature exceeds a pre-set allowable maximum and a second prediction, based upon the current value of power, of a time period before the accumulated loss of life exceeds a pre-set allowable maximum. If the shorter time period of the two calculations is less than a pre-set value, for example one half hour, the processor generates an alarm signal and a display counting down the time remaining in the period, together with a second alarm signal at a shorter second time of for example one quarter hour.

    摘要翻译： 用于监测和控制电力变压器的操作的装置包括具有输入换能器的处理器，用于向处理器提供指示变压器的绕组中的电流和变压器外部的环境温度的输入。 处理器使用基于热传递的算法来布置，以基于热点温度超过预设允许最大值和第二预测之前的时间段的电流和环境温度的当前值重复计算第一预测 基于当前的功率值，在累积的寿命损失超过预定的允许最大值之前的时间段内。 如果两次计算的较短时间段小于预定值（例如一个半小时），则处理器产生一个报警信号和一个在该周期内剩余时间的下降的显示以及第二个报警信号 较短的第二次例如四分之一小时。