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1.发明授权System, apparatus and method for compensating the sensitivity of a sequence element in a line current differential relay in a power system 有权用于补偿电力系统中的线路电流差动继电器中的序列元件的灵敏度的系统，装置和方法公开(公告)号：US07660088B2
公开(公告)日：2010-02-09
申请号：US11337894
申请日：2006-01-23
摘要： An apparatus and method compensate for the sensitivity of at least one line current differential element of a first current differential relay providing differential protection for a transmission line of a power system during a single-phase pole-open condition. The apparatus includes a first delta filter configured to remove a first pre-fault current from a first fault current of the transmission line to derive a compensated first current phasor. The apparatus also includes a second delta filter configured to remove a second pre-fault current from a second fault current of the transmission line to derive a compensated second current phasor. The compensated first and second current phasors are provided to the at least one line current differential element to compensate the sensitivity of the at least one line current differential element.
摘要翻译： 一种装置和方法补偿在单相极点打开状态期间为电力系统的传输线提供差动保护的第一电流差动继电器的至少一个线路电流差分元件的灵敏度。 该装置包括第一增量滤波器，其被配置为从传输线的第一故障电流去除第一预故障电流以导出补偿的第一电流相量。 该装置还包括第二增量滤波器，其被配置为从传输线的第二故障电流去除第二预故障电流以导出补偿的第二电流相量。 补偿的第一和第二电流相量被提供给至少一个线路电流差动元件以补偿至少一个线路电流差动元件的灵敏度。
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2.发明授权Protective relay for power systems having fault distance measurement filter logic 有权具有故障距离测量滤波器逻辑的电力系统的保护继电器公开(公告)号：US07345862B2
公开(公告)日：2008-03-18
申请号：US10695978
申请日：2003-10-29
IPC分类号： H02H3/42
CPC分类号： H02H3/40
摘要： The system is used in a distance-type protective relay which includes a calculation circuit responsive to voltage and current values from a power line to produce a quantity which is analogous to the distance between the relay and a fault on the line, referred to as an m quantity. This quantity is then applied to a distance element/circuit for comparison of said quantity with a setting reach value for a zone one distance protection to determine whether the fault is within zone one protection. The system includes a filter circuit which filters the quantity before it reaches the distance element, resulting in a smoothing of said quantity and rejection of noise therefrom. The system further includes a control circuit which determines whether the filter is to be used in the system in a particular situation, depending upon whether when the value of the quantity is above a selected percentage of the setting reach value.
摘要翻译： 该系统用于距离型保护继电器，其包括响应于来自电力线的电压和电流值的计算电路，以产生类似于继电器与线路上的故障之间的距离的量，称为 数量。 然后将该数量应用于距离元件/电路，用于将所述数量与区域一距离保护的设定到达值进行比较，以确定故障是否在区域一保护范围内。 该系统包括一个过滤器电路，它在到达距离元件之前对其进行过滤，导致所述数量的平滑化和噪音的抑制。 该系统还包括控制电路，该控制电路根据该数量的值是否在设定达到值的选定百分比以上来确定是否在特定情况下在系统中使用该滤波器。
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3.发明授权公开(公告)号：US06608742B2
公开(公告)日：2003-08-19
申请号：US09899961
申请日：2001-07-06
申请人： Edmund O. Schweitzer, III , Jeffrey B. Roberts , Armando Guzman-Casillas , Joseph B. Mooney , Luther S. Anderson
发明人： Edmund O. Schweitzer, III , Jeffrey B. Roberts , Armando Guzman-Casillas , Joseph B. Mooney , Luther S. Anderson
IPC分类号： H02H300
摘要： The system includes a plurality of protection application elements to accomplish various power system protection functions, including for example line protection, line fault location, current direction determination, breaker protection and synchronism check, among others. The system includes local sources of current and voltage information for the protective functions as well as a receiving section for receiving such current and voltage values from a remote source, such as another protection device, as well as other necessary input information for the protective functions. A selection logic section is responsive to the output of the protective function elements, as well as the local and remote data to determine whether the primary or local sources are to be used. The outputs of the protective function elements are used by an output section to control circuit breakers and the like and are also transmitted, with the local and remote source quantities, to other protective devices.
摘要翻译： 该系统包括多个保护应用元件，以实现各种电力系统保护功能，包括例如线路保护，线路故障定位，电流方向确定，断路器保护和同步检查等。 该系统包括用于保护功能的本地电流和电压信息源以及用于从远程源（例如另一保护装置）接收这种电流和电压值的接收部分以及用于保护功能的其它必要的输入信息。 选择逻辑部分响应于保护功能元件的输出以及本地和远程数据，以确定是使用主源还是本地源。 保护功能元件的输出由输出部分用于控制断路器等，并且还将本地和远程源数据传输到其他保护装置。
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公开(公告)号：US06559622B2
公开(公告)日：2003-05-06
申请号：US09899892
申请日：2001-07-06
申请人： Joseph B. Mooney
发明人： Joseph B. Mooney
IPC分类号： G05F170
CPC分类号： H02J3/1807 , H02H1/04 , H02H3/382 , Y02E40/30
摘要： The system includes an enable signal applied to an output AND element. A comparator compares the voltage ratio of selected measured and calculated phase-to-phase or single phase voltages against a threshold value. An AND gate is responsive to a high signal from the comparator and indications of a three pole open condition, a single pole open condition for selected poles, and a loss of potential condition. A high output from the AND gate is applied to a timer, which produces a high output for a short period of time, which controls the output element. The output element provides a blocking signal for the protective elements under particular conditions and a permissive signal under other conditions.
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