-
1.发明授权Protection quality capability for protective relays used in an electric power system 失效电力系统中使用的保护继电器的保护质量能力
公开(公告)号：US6011480A
公开(公告)日：2000-01-04
申请号：US898793
申请日：1997-07-23
CPC分类号： H02H3/04
摘要： The system for determining protection quality of a protective relay and related functions of the protection system include obtaining information concerning the output status of the various protective elements in the relay. The status of various operations in the protective element are also evaluated against specific standards. The operation of supervisory and control elements affecting the action protective elements are also evaluated. Other aspects of the relay, including the availability of the relay and the operation of the voltage and current transformers are also evaluated. In addition, associated aspects such as the status of the communication channels, the station voltage availability and the condition of the trip and close circuits are monitored. All of the above is analyzed in a summary report to provide an indication of protection quality for the relay and associated protection system functions.
摘要翻译： 用于确定保护继电器的保护质量的系统和保护系统的相关功能包括获得关于继电器中各种保护元件的输出状态的信息。 保护要素中各种作业的状况也按照具体标准进行评估。 还对影响行动保护要素的监督和控制要素的运行情况进行了评估。 还评估了继电器的其他方面，包括继电器的可用性和电压和电流互感器的操作。 此外，监视诸如通信信道的状态，站电压可用性以及跳闸和关闭电路的状况等相关方面。 所有上述内容都在总结报告中进行分析，以提供继电器和相关保护系统功能的保护质量指示。
-
2.发明授权
公开(公告)号：US5041737A
公开(公告)日：1991-08-20
申请号：US470061
申请日：1990-01-25
IPC分类号： H02H3/00
CPC分类号： H02H3/006 , Y10T307/74 , Y10T307/826
摘要： A bus-tie relay apparatus which includes a multi-position mechanical switch (54) and a logic circuit (56) responsive to the position of the mechanical switch (54) for producing digital signals on five digital lines (58), wherein a valid digital signal comprises the presence of high conditions on two, and two only, of said digital lines (58). A sensor (80) senses the condition of the digital lines (58) and retrieves the values of a relay element setting group from memory associated with that digital signal. A plurality of such relay element setting groups are stored in the apparatus, each one of which comprises values corresponding to the characteristics of an inplace relay associated with a particular one transmission line in a group thereof.
摘要翻译： 一种汇流中继装置，包括多位机械开关（54）和响应于机械开关（54）的位置的逻辑电路（56），用于在五个数字线路（58）上产生数字信号，其中有效 数字信号包括在所述数字线路（58）的两个且仅两个上存在高条件。 传感器（80）感测数字线（58）的状态，并且从与该数字信号相关联的存储器中检索中继元件设置组的值。 多个这样的中继元件设置组被存储在该装置中，每一个包括与其组中的特定一个传输线相关联的内置继电器的特性对应的值。
-
3.发明授权
公开(公告)号：US5349490A
公开(公告)日：1994-09-20
申请号：US961260
申请日：1992-10-15
摘要： A directional element measures the negative sequence voltage and the negative sequence current and from those quantities produces a scalar quantity related to the negative sequence impedance of a power transmission line relative to the location of the directional element. The scalar quantity is then compared against two threshold quantity settings, one to determine a forward fault, the other to determine a reverse fault. The scalar quantity must be less than the forward threshold quantity for a forward fault and greater than the reverse threshold quantity for a reverse fault.
摘要翻译： 方向元件测量负序电压和负序电流，并且从那些量产生与电力传输线相对于方向元件的位置的负序阻抗相关的标量。 然后将标量与两个阈值设置进行比较，一个用于确定正向故障，另一个用于确定反向故障。 标量必须小于正向故障的正向阈值，大于反向故障的反向阈值。
-
4.发明授权
公开(公告)号：US5365396A
公开(公告)日：1994-11-15
申请号：US83454
申请日：1993-06-28
摘要： A directional element measures the negative sequence voltage and the negative sequence current and from those quantities produces a scalar quantity related to the negative sequence impedance of a power transmission line relative to the location of the directional element. The magnitude of the negative sequence impedance is calculated from the magnitude of the negative sequence voltage and magnitude of the negative sequence current. The scalar quantity is then compared against two threshold quantity settings, one to determine a forward fault and the other to determine a reverse fault. The threshold quantity settings include, respectively, a selected fraction of preselected basic threshold values and a selected fraction of the magnitude of the negative sequence impedance. The scalar quantity must be less than the forward threshold quantity for a forward fault and greater than the reverse threshold quantity for a reverse fault.
摘要翻译： 方向元件测量负序电压和负序电流，并且从那些量产生与电力传输线相对于方向元件的位置的负序阻抗相关的标量。 负序阻抗的大小根据负序电压的大小和负序电流的大小计算。 然后将标量与两个阈值设置进行比较，一个用于确定正向故障，另一个用于确定反向故障。 阈值设置分别包括预选基本阈值的选定分数和负序阻抗幅度的选定分数。 标量必须小于正向故障的正向阈值，大于反向故障的反向阈值。
-
5.发明授权Polarizing potential transfer switch circuit for use with power transmission lines 失效用于输电线路的极化电位转换开关电路
公开(公告)号：US5262679A
公开(公告)日：1993-11-16
申请号：US737373
申请日：1991-07-29
CPC分类号： H02J3/04 , H02B1/24 , H02H1/04 , Y10T307/826 , Y10T307/839
摘要： The polarizing potential transfer switch system takes advantage of an existing loss-of-potential (LOP) circuit (32) in a power transmission line protective system to differentiate between a trip signal produced by the distance elements in a protective relay (22) due to the operation of the transfer switch and a true fault condition. This is accomplished by a logic circuit (40) which includes a first timer (58) which permits the operator of the transfer switch (10) five seconds to complete the potential transfer operation between two buses (14 and 16) and a second timer (68) which gives the LOP circuit (32) a selected number of cycles in which to block a trip signal produced by the distance elements in the relay (22).
摘要翻译： 极化电位转移开关系统利用电力传输线路保护系统中的现有的电位（LOP）电路（32）来区分由于保护继电器（22）中的距离元件产生的跳闸信号，由此 转换开关的操作和真实的故障状态。 这是通过逻辑电路（40）实现的，逻辑电路（40）包括第一定时器（58），其允许转换开关（10）的操作者五秒钟以完成两条总线（14和16）和第二计时器（14和16）之间的潜在转移操作 68）给LOP电路（32）选择数量的周期，以阻止由继电器（22）中的距离元件产生的跳闸信号。
-
6.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。
-
7.发明授权Detection of transformer high side fuse operations in a power transmission system 失效变压器高侧保险丝检测在输变电系统中的运行
公开(公告)号：US5602707A
公开(公告)日：1997-02-11
申请号：US546481
申请日：1995-10-20
摘要： Voltage comparisons are made for each of the phase-phase voltages on a low side of a distribution transformer in a power system against a threshold, approximately 0.7 nominal secondary voltage, which is less than the value of at least one phase-phase voltage when only one high side fuse has operated. High outputs result when the phase-phase voltages exceed the threshold. At the same time voltage comparisons are made of each of the phase-phase low side voltages and a second threshold, approximately 0.2 nominal secondary voltage, which is substantially less than the first threshold. High outputs result when the voltages are below the threshold. A circuit output is provided which can be used to trip a low side circuit breaker when at least one output of the first comparisons is high and at least one output of the second comparisons is high.
摘要翻译： 对于电力系统中配电变压器的低侧的每个相电压进行电压比较，阈值约为0.7，标称次级电压小于当仅仅至少一相相电压时的值 一个高边保险丝已经运行。 当相电压超过阈值时，会产生高输出。 同时，对每个相位低侧电压和第二阈值进行电压比较，其大约为0.2标称次级电压，其大大小于第一阈值。 当电压低于阈值时，会产生高输出。 提供电路输出，当第一比较的至少一个输出为高并且第二比较的至少一个输出为高时，该输出可用于跳闸低侧断路器。
-
8.发明授权Fault identification system for use in protective relays for power transmission lines 失效用于输电线路保护继电器的故障识别系统
公开(公告)号：US5515227A
公开(公告)日：1996-05-07
申请号：US492890
申请日：1995-06-20
CPC分类号： H02H3/343
摘要： The angle between the negative sequence and zero sequence currents for a power signal on a transmission line is measured and compared against a plurality of successive angle ranges from 0.degree. to 360.degree.. If the angle is 0.degree..+-.30.degree., an AG fault is indicated and a first section output is produced blocking ground elements BG and CG and phase-to-phase elements AB and CA. An angle of 120.degree..+-.30.degree. indicates a BG fault, resulting in a second output blocking ground elements AG and CG and phase-to-phase elements AB and BC, while a phase angle of 240.degree..+-.30.degree. indicates a CG fault, resulting in a third output blocking ground elements AG and BG and phase-to-phase elements BC and CA. If the phase angle is not covered by the above three primary ranges, then a second stage of comparisons are made, including determining the magnitudes of the phase-to-phase distance elements, and then comparing the phase-to-phase resistance of the lowest of those with the apparent resistance of the one ground element, i.e. AG, BG or CG, associated with the non-primary (secondary) range of angles which includes the measured phase angle. If selected criteria are met, then an output is asserted to block the ground and phase-to-phase elements noted above associated with that ground element.
摘要翻译： 测量传输线上的功率信号的负序和零序电流之间的角度，并与0°至360°的多个相继的角度范围进行比较。 如果角度为0°+/- 30°，则表示AG故障，产生阻挡接地元件BG和CG以及相间元件AB和CA的第一段输出。 120°±30°的角度表示BG故障，导致第二输出阻塞接地元件AG和CG以及相间元件AB和BC，而相位角为240°±30°表示 CG故障，导致第三输出阻塞接地元件AG和BG以及相间元件BC和CA。 如果相位角未被上述三个主要范围覆盖，则进行第二阶段的比较，包括确定相间距离元件的幅度，然后比较最低相位的相位电阻 具有与包括测量的相位角的非初级（次级）角度范围相关联的一个接地元件即AG，BG或CG的视在电阻的那些。 如果满足选择的标准，则输出被断言以阻止上述与该接地元件相关联的接地和相间元件。
-
9.发明授权System for improving protective relay coordination with other protective elements in power system 有权用于改善与电力系统中其他保护元件的保护继电器配合的系统
公开(公告)号：US6101075A
公开(公告)日：2000-08-08
申请号：US150556
申请日：1998-09-10
申请人： Jeffrey B. Roberts
发明人： Jeffrey B. Roberts
CPC分类号： H02H7/30
摘要： The system first identifies the existence of a fault involving ground using the phase angle difference between negative sequence and zero sequence current on the power line. Phase angle differences within three specific ranges provide an indication of the presence of particular faults. Once a particular fault has been identified, such as a BC-to-ground fault, the fault condition is monitored to determine if the fault evolves, such as to a C-to-ground fault from the BC-to-ground fault. If an evolution is recognized, the protective relay is reset so as to coordinate its operation with downstream protective elements for the evolved fault.
摘要翻译： 系统首先利用电力线上的负序和零序电流之间的相位角差来识别涉及地面的故障。 三个特定范围内的相位角差异表示特定故障的存在。 一旦识别出特定的故障，例如BC对地故障，则监视故障状况以确定故障是否发生，例如从BC到地故障的C对地故障。 如果识别出演进，则保护继电器被复位，以便协调其与用于演化故障的下游保护元件的操作。
-
10.发明授权System for preventing undesired protective relay tripping actions due to coupling capacitor voltage transformer transients 失效用于防止由于耦合电容器电压互感器瞬变引起的不期望的保护继电器跳闸动作的系统
公开(公告)号：US6028754A
公开(公告)日：2000-02-22
申请号：US953310
申请日：1997-10-17
CPC分类号： H02H3/40 , H02H1/0007 , H02H1/04 , H02H3/04
摘要： The system impedance ratio (SIR) is determined for the original zone 1 distance element reach of a protective relay. The reduction in the original zone 1 reach is then determined, using the SIR value and a known table of reduced values. When a fault is recognized the minimum reach to just detect the fault is determined. A trip signal is provided without any delay if the minimum reach is less than or equal to the reduced reach. The trip is delayed for a selected time if the minimum reach is greater than the reduced reach but not greater than the original reach.
摘要翻译： 对于保护继电器的原始区域1距离元件到达，确定系统阻抗比（SIR）。 然后使用SIR值和已知的减小值来确定原始区域1达到的减小。 当识别故障时，确定刚刚检测到故障的最小范围。 如果最小距离小于或等于减小的距离，则提供跳闸信号而没有任何延迟。 如果最小距离大于缩小的距离但不大于原来的距离，则该行程延迟选定的时间。
-
-
-
-
-
-
-
-
-
搜索结果
33 条记录 (耗时 0.018 秒)
