公开(公告)号：US5446387A

公开(公告)日：1995-08-29

申请号：US124034

申请日：1993-09-21

申请人： Leif Eriksson ,  Murari M. Saha

发明人： Leif Eriksson ,  Murari M. Saha

IPC分类号： G01R31/08

CPC分类号： G01R31/085 ,  H02H3/40

摘要： A method and a device for determining the distance from a measuring station to a fault on a transmission line based on a fault model of a transmission network while taking into consideration the zero-sequence impedance and, where assuming a fault current, while taking into consideration the feeding of fault current to the fault point from both ends of the transmission line (FIG. 3 ).

摘要翻译： 一种在考虑到零序阻抗的情况下，基于传输网络的故障模型来确定从测量站到传输线上的故障的距离的方法和装置，并且在考虑到故障电流的同时考虑 从传输线的两端向故障点馈送故障电流（图3）。

公开(公告)号：US5493228A

公开(公告)日：1996-02-20

申请号：US311124

申请日：1994-09-23

申请人： Leif Eriksson ,  Murari M. Saha

发明人： Leif Eriksson ,  Murari M. Saha

IPC分类号： H02H7/26 ,  G01R31/14

CPC分类号： H02H7/26

摘要： A method and a device, after a fault has occurred in a power network, for measuring and recreating the phase currents I.sub.B prior to the occurrence of the fault by determining continuously, starting from sampled measured values of the phase currents up to the time of the fault for each phase, the amplitude I and the phase angle .phi. of the phase currents based on two consecutive sampled measured values, whereupon a comparison is made between the last determined value I.sub.k obtained and the rated current I.sub.n of the power network. If I.sub.k is greater than I.sub.n, it is considered that a fault has occurred and the phase currents prior to the fault are indicated as I.sub.B =I.sub.k-1 .multidot.sin (.phi..sub.k-1 +.omega.(t-t.sub.k-1)).

摘要翻译： 在电力网络发生故障之后的方法和装置，用于通过连续地确定故障发生之前的相电流IB的测量和重新创建，从相电流的采样测量值开始直至时间 基于两个连续采样的测量值，相位电流的振幅I和相位角度phi，从而在所获得的最后确定值Ik和电力网络的额定电流In之间进行比较。 如果Ik大于In，则认为发生故障，故障前的相电流表示为IB = Ik-1sin（phi k-1 +ω（t-tk-1））。

公开(公告)号：US5399974A

公开(公告)日：1995-03-21

申请号：US75895

申请日：1993-06-14

申请人： Leif Eriksson ,  Murari M. Saha

发明人： Leif Eriksson ,  Murari M. Saha

IPC分类号： H02H3/38 ,  H02H7/26 ,  G01R31/08

CPC分类号： H02H7/26 ,  H02H3/385

摘要： A method and a device for determining the fault current which occurs in case of a fault through a short circuit between phases or from phase/phases to ground. A measure of the fault current can be obtained by a linear combination of the sum of measured current samples for each phase at two adjacent points in time and in which each of these sample values is multiplied by a coefficient which is chosen such that the fault current gets into phase with the positive- and negative-sequence current changes.

摘要翻译： 一种用于确定在相间或从相/相到地之间通过短路发生故障的故障电流的方法和装置。 故障电流的测量可以通过两个相邻时间点的每个相位的测量电流采样之和的线性组合来获得，其中这些采样值中的每一个乘以被选择为使得故障电流 与正序和负序电流变化相变。

公开(公告)号：US5390067A

公开(公告)日：1995-02-14

申请号：US21074

申请日：1993-02-23

申请人： Leif Eriksson ,  Murari M. Saha ,  Kjell Svensson

发明人： Leif Eriksson ,  Murari M. Saha ,  Kjell Svensson

IPC分类号： H02H3/38 ,  H02H3/26 ,  H02H3/40

CPC分类号： H02H3/385

摘要： A method and a device for phase selection for single-pole tripping of high-impedance ground faults in direct grounded power networks. Starting from the ratio of the negative-sequence voltage to the zero-sequence current (U2/I0) and the ratio of the negative-sequence voltage to the positive-sequence voltage (U2/U1), two criteria with different conditions are formed, each of which indicating a faulted phase, and if both criteria indicate the same phase as faulted, single-pole tripping can take place.

摘要翻译： 一种用于直接接地电网中高阻抗接地故障单极跳闸相位选择的方法和装置。 从负序电压与零序电流（U2 / I0）的比值以及负序电压与正序电压（U2 / U1）的比率开始，形成了具有不同条件的两个标准， 每个指示故障相位，并且如果两个标准指示与故障相同的相位，则可以发生单极跳闸。

公开(公告)号：US5375026A

公开(公告)日：1994-12-20

申请号：US998725

申请日：1992-12-30

申请人： Leif Eriksson ,  Murari M. Saha

发明人： Leif Eriksson ,  Murari M. Saha

IPC分类号： H02H1/04 ,  H02H3/26 ,  H02H3/32

CPC分类号： H02H3/26 ,  H02H1/04

摘要： A method and a device for preventing overstabilization of longitudinal differential protections in case of internal faults on power lines, which may take place when a fault situation, which is indicated as an external faults, is in reality an internal fault. The invention comprises criteria which finally provide information as to whether the longitudinal differential protection is to enter into operation. The criteria comprise level and directional determination of the currents which are measured in the terminals of the power lines, checking whether these have the same direction, and so on.

摘要翻译： 一种用于防止在电力线路内部故障的情况下纵向差动保护的过度稳定的方法和装置，当作为外部故障指示的故障情况实际上是内部故障时，这可能发生。 本发明包括最终提供关于纵向差动保护是否投入运行的信息的标准。 标准包括在电力线的端子中测量的电流的电平和方向确定，检查这些电流是否具有相同的方向等等。

公开(公告)号：US5352983A

公开(公告)日：1994-10-04

申请号：US983728

申请日：1992-12-01

申请人： Leif Eriksson ,  Murari M. Saha

发明人： Leif Eriksson ,  Murari M. Saha

IPC分类号： G01R31/08 ,  H02H7/26

CPC分类号： G01R31/08 ,  H02H7/267

摘要： The invention relates to a method and a device for detecting a flashover between conductors in power transmission lines of different voltage levels suspended from the same towers and wherein the power lines are included in a power network where one of the power lines is stated to be a high-voltage power line (1) and where the other power lines are connected to the high-voltage line via transformers of a known transformer ratio (am) and internal impedance (ZXm) and wherein the line impedances (ZL) are known. Specific to the invention is that the fault current which is caused by a flashover is set to be equal to a detected current change in any of the phases in the high-voltage line. With this assumption an equation system can be set up with the aid of which the relative distance to fault n (0

摘要翻译： 本发明涉及一种用于检测从同一塔悬挂的不同电压电平的输电线路中的导体之间的闪络的方法和装置，其中电力线包括在电力网络中，其中一条电​​力线被称为 高压电力线（1），其他电力线通过已知变压器比（am）和内部阻抗（ZXm）的变压器连接到高压线，并且其中线路阻抗（ZL）是已知的。 本发明的特征在于，将由闪络引起的故障电流设定为与高压线路中的任一相的检测电流变化相等。 通过这个假设，可以建立方程系统，借此可以确定与故障n（0

公开(公告)号：US07170409B2

公开(公告)日：2007-01-30

申请号：US10794408

申请日：2004-03-05

申请人： Jakob Ehrensvärd ,  Stina Ehrensvärd ,  Leif Eriksson ,  Fredrik Einberg

发明人： Jakob Ehrensvärd ,  Stina Ehrensvärd ,  Leif Eriksson ,  Fredrik Einberg

IPC分类号： G08B1/08

CPC分类号： G08B13/126 ,  B65B61/00 ,  G06K19/07798 ,  G06Q10/08

摘要： A packaging and a method for monitoring a packaging (10) of a disposable material in a chain of logistics. As an integral part of the packaging, the packaging has an electronic module (12) comprising electric energy supply means, data processing means, data storage nonvolatile memory means for storing information related to the packaging, time keeping means, and data transceiver means for transmitting and receiving said information in communication with a host computer (30). The electronic module also has sensor means (14, 20) for detecting a changed physical condition of the packaging and for signaling information representing said changed physical condition to the electronic module (12) to be stored in the memory means together with a notation of time from the time keeping means.

摘要翻译： 一种用于监测物流链中的一次性物料的包装（10）的包装和方法。 作为包装的组成部分，包装具有电子模块（12），其包括电能供应装置，数据处理装置，数据存储非易失性存储装置，用于存储与包装相关的信息，时间保持装置和用于发送的数据收发器装置 以及接收与主计算机（30）通信的所述信息。 电子模块还具有传感器装置（14,20），用于检测包装的变化的物理状况，以及用于将表示所述改变的物理状态的信号信息发送到电子模块（12），以便将其与时间的符号一起存储在存储装置中 从时间的手段。

公开(公告)号：US06917790B1

公开(公告)日：2005-07-12

申请号：US09712133

申请日：2000-11-15

申请人： Christian Braun ,  Olov Edvardsson ,  Leif Eriksson

发明人： Christian Braun ,  Olov Edvardsson ,  Leif Eriksson

IPC分类号： H01Q1/24 ,  H01Q1/36 ,  H01Q7/00 ,  H01Q21/28 ,  H04B7/02

CPC分类号： H01Q21/28 ,  H01Q1/242 ,  H01Q1/36 ,  H01Q7/00

摘要： An antenna device for transmitting and receiving electromagnetic waves, wherein the antenna device includes a transmitter section and a receiver section. The receiver section includes a receiving antenna structure selectively switchable between a plurality of configuration states. The antenna structure may be switched by a switching device, which is controlled by a control device. The selective switching is effected based upon a first measure representing a reflection coefficient measured at the transmitter section. A method for transmitting and receiving electromagnetic waves includes receiving a measure representing a reflection coefficient and controlling a switching device to selectively switch an antenna structure between a plurality of antenna configuration states in response to the measure representing the reflection coefficient.

摘要翻译： 一种用于发送和接收电磁波的天线装置，其中天线装置包括发射机部分和接收机部分。 接收机部分包括可在多个配置状态之间切换的接收天线结构。 天线结构可以通过由控制装置控制的开关装置来切换。 基于表示在发射机部分测量的反射系数的第一测量来实现选择性切换。 一种用于发送和接收电磁波的方法包括：接收表示反射系数的测量，并响应于表示反射系数的量度，控制切换装置，以选择性地在多个天线配置状态之间切换天线结构。

公开(公告)号：US3976920A

公开(公告)日：1976-08-24

申请号：US580461

申请日：1975-05-22

申请人： Leif Eriksson ,  Lennart Thornell

发明人： Leif Eriksson ,  Lennart Thornell

IPC分类号： H02H1/04 ,  H02H7/22

CPC分类号： H02H1/04

摘要： For filtering off of low frequency and a periodic transient phenomena in relay protection devices for electric high voltage networks, the signals of which occur in the event of a fault in the network and which are superimposed on the signals supplied to measuring relays arranged in the relay protection device, a normally short-circuited filter is included in a normally open alternative path for the measuring signal which is parallel to a part of the normal signal path. A supervisory circuit includes a time circuit, a fast fault indicator and an undervoltage detector. A signal from the fault indicator breaks the short-circuit of the filter and, upon a signal from the undervoltage detector, connects the filter in the path of the measuring signal. The measuring relay is blocked during a time interval which is equal to the difference between the pulse time of the time circuit and the time of operation of the undervoltage detector. This is accomplished by an AND-gate which has its inputs connected to the fast fault indicator and to the undervoltage detector and its output connected to a make-and-break contact for closing the alternative current path.

摘要翻译： 用于过滤低频电网以及用于电力高压网络的继电保护装置中的周期性瞬变现象，其信号发生在网络中发生故障并且叠加在提供给设置在继电器中的测量继电器的信号上 保护装置中，正常短路的滤波器包括在平行于正常信号路径的一部分的测量信号的常开的替代路径中。 监控电路包括时间电路，快速故障指示器和欠压检测器。 来自故障指示器的信号会破坏滤波器的短路，并且根据来自欠压检测器的信号将滤波器连接到测量信号的路径中。 测量继电器在等于时间电路的脉冲时间与欠压检测器的工作时间之间的时间间隔内被阻塞。 这是通过与其门的输入连接的快门故障指示器和欠电压检测器的AND门完成的，其输出端连接到断开触点以闭合替代电流路径。

公开(公告)号：US5764064A

公开(公告)日：1998-06-09

申请号：US604981

申请日：1996-03-01

申请人： Leif Eriksson ,  Murari Mohan Saha

发明人： Leif Eriksson ,  Murari Mohan Saha

IPC分类号： H02H3/16 ,  G01R31/14

CPC分类号： H02H3/165

摘要： A method and a device for identifying, when a fault has been detected in a power network, single-phase to ground faults by determining for each phase an auxiliary current based on the present phase current, ground fault current and ground current. If the difference between two consecutive, calculated values of the auxiliary current in some phase is smaller than a predetermined limit value, this means that there is a single ground fault in this phase.

摘要翻译： PCT No.PCT / SE94 / 00892 Sec。 371日期1996年3月1日 102（e）1996年3月1日PCT PCT 1994年9月28日PCT公布。 公开号WO95 / 09467 日期1995年4月6日一种方法和装置，用于通过根据当前相电流确定每相相辅助电流，在电力网中检测到故障时，单相接地故障，接地故障电流和接地 当前。 如果在某一相中辅助电流的两个连续的计算值之间的差小于预定的极限值，则这意味着在该阶段存在单个接地故障。