公开(公告)号：US20170366007A1

公开(公告)日：2017-12-21

申请号：US15524951

申请日：2015-11-25

申请人： Maschinenfabrik Reinhausen GmbH

发明人： Stefan ABELEN ,  Daniel PREISSLER ,  Audrius ILGEVICIUS ,  Karsten VIERECK ,  Tobias WAGNER ,  Tobias GRUBER

IPC分类号： H02J3/18 ,  H02J3/46 ,  G01R19/06

CPC分类号： H02J3/1878 ,  G01R19/06 ,  H02J3/46 ,  Y02E40/30

摘要： A method for controlling the parallel running of a plurality of transformers T1, T2, . . . , TN) in a parallel circuit (10) is disclosed, wherein each of the transformers (T1, T2, . . . , TN) is assigned a measuring/control device (12) and all the measuring/control devices (12) are connected to one another via a communication connection (16). In the absence of a standby signal of at least one measuring/control device (12), interruption (16) of the communication (14) is displayed. The measured values determined at the time (t) of the interruption remain constant for the duration of the interruption (16) and are also included in the calculation of the control errors during the interruption (16), in order to minimise a circuit reactive current of the transformers (T1, T2, . . . , TN).

公开(公告)号：US4786863A

公开(公告)日：1988-11-22

申请号：US50628

申请日：1987-05-15

申请人： Miran Milkovic

发明人： Miran Milkovic

IPC分类号： G01R21/127 ,  G01R19/06 ,  G01R19/00

CPC分类号： G01R21/127

摘要： A switched-capacitor integrator is employed in an electronic watthour measurement device for integrating the average component of a product signal formed by pulse-width modulating an analog signal proportional to one of a load current and voltage at a pulse duty ratio proportional to the other of the load current and voltage. A hysteresis comparator forces the direction of integration to alternate between positive and negative limits for balancing out offset voltages in the integrator and comparator. A triangular-wave generator employed as part of the pulse-width-modulation technique is also implemented using a switched-capacitor integrator. The switched-capacitor integrators permit fabrication of the circuit with the required accuracy without needing external, discrete time-constant-determining resistances and capacitances. Measurement accuracy is determined by the ratio of capacitances of two on-chip capacitors, the accuracy to a clock signal and two reference voltages. These parameters are closely controllable on a single MOS or CMOS chip using normal process control whereby the entire electronic watthour measurement device may be realized on a single chip without requiring off-chip components.

摘要翻译： 在电子电度测量装置中采用开关电容积分器，用于将以与负载电流和电压中的一个成比例的模拟信号的脉冲宽度调制形成的乘积信号的平均分量与 负载电流和电压。 滞后比较器会强制积分方向在正极和负极之间交替，以平衡积分器和比较器中的失调电压。 作为脉冲宽度调制技术的一部分采用的三角波发生器也使用开关电容积分器来实现。 开关电容器积分器允许以所需精度制造电路，而不需要外部的离散时间常数确定电阻和电容。 测量精度由两个片上电容器的电容比，时钟信号的精度和两个参考电压决定。 这些参数在单个MOS或CMOS芯片上使用正常的过程控制可以很好地控制，从而整个电子瓦特测量装置可以在单个芯片上实现，而不需要片外部件。

公开(公告)号：US4131847A

公开(公告)日：1978-12-26

申请号：US811990

申请日：1977-06-30

申请人： Masayuki Kohga ,  Katsuto Ishii

发明人： Masayuki Kohga ,  Katsuto Ishii

IPC分类号： G01R19/06 ,  G01R21/00 ,  G01R7/00

CPC分类号： G01R21/001 ,  G01R19/06

摘要： A device for measuring the active component and reactive component of AC current or AC power comprising a first detector detecting AC voltage of an AC circuit, a second detector detecting AC current flowing through the AC circuit, a phase shifter shifting the phase of the detected AC voltage by .pi./2, first switch selectively transmitting one of the detected AC voltage and the phase-shifted AC voltage, a signal generator generating a pulse signal lasting over a selected one half cycle of the two opposite half cycles constituting one cycle of the detected AC voltage transmitted through the first switch, a second switch responsive to the pulse signal to permit transmission of an AC voltage corresponding to the detected AC current, and a circuit computing the active or reactive component of the root mean square value of the AC current or power of the AC circuit on the basis of the AC voltage permitted to transmit through the second switch thereby providing an output signal representing the result of computation.

摘要翻译： 一种用于测量AC电流或AC电力的有源分量和无功分量的装置，包括检测AC电路的AC电压的第一检测器，检测流过AC电路的AC电流的第二检测器，移相器，将检测到的AC 电压乘以pi / 2，第一开关选择性地发送检测到的AC电压和相移AC电压中的一个;信号发生器，产生持续超过所检测的一个周期的两个相对半周期的选定的一半周期的脉冲信号 通过第一开关传输的交流电压，响应于脉冲信号的第二开关，以允许传输对应于检测到的交流电流的交流电压，以及电路计算交流电流的均方根值的有功或无功分量，或 基于允许通过第二开关发送的AC电压，AC电路的功率由此提供表示th的输出信号 计算结果。

公开(公告)号：US3783259A

公开(公告)日：1974-01-01

申请号：US3783259D

申请日：1972-10-20

申请人： ITT

发明人： MARSHALL N

IPC分类号： G01R19/06 ,  G06G7/22 ,  G06G7/16

CPC分类号： G06G7/22

摘要： A method and system which may be employed to, for example, produce a D.C. voltage or current directly proportional to I cos phi a or I sin phi a, where I is the peak A.C. current through a load, and phi a is the phase of the current. Current and voltage analogs of the load current and voltage, respectively, are multiplied. A low pass filter eliminates the A.C. terms of the multiplier output. The D.C. term is directly proportional to I cos phi a or I sin phi a. A ninety degree phase shifter with a single-pole, double-throw switch makes, for example, manual selection of one of the two outputs I COS phi a and I sin phi a possible. Alternatively, a square or other periodic wave may be used for the voltage analog. In any case, the voltage analog or equivalent has a peak amplitude which may be maintained constant by a variable gain amplifier or by sampling the above breakdown voltage drop across a zener diode. The analog voltage or current of the products I cos phi a and I sin phi a may be read on a D.C. voltmeter or milliammeter, respectively, calibrated in current.

摘要翻译： 可用于例如产生直流电压或电流与I cos phi a或I sin phi a成正比的方法和系统，其中I是通过负载的峰值AC电流，而phi a是 当前。 负载电流和电压的电流和电压模拟量分别相乘。 低通滤波器消除了乘法器输出的交流条件。 D.C.术语与I cos phi a或I sin phi a成正比。 具有单刀双掷开关的九十度移相器例如可以手动选择两个输出之一，即COS phi和I sin phi。 或者，可以使用正方形或其它周期波作为电压模拟。 在任何情况下，电压模拟或等效物具有峰值振幅，其可以由可变增益放大器保持恒定，或者通过采样齐纳二极管上的上述击穿电压降。 可以在直流电压表或毫安表上读取产品I cos phi a和I sin phi a的模拟电压或电流，以电流校准。

公开(公告)号：US3426277A

公开(公告)日：1969-02-04

申请号：US3426277D

申请日：1965-04-19

申请人： LICENTIA GMBH

发明人： CARL HEINZ ,  STUMPE AUGUST CHRISTIAN

IPC分类号： G01R31/26 ,  G01R19/06

CPC分类号： G01R31/263

公开(公告)号：US1809062A

公开(公告)日：1931-06-09

申请号：US16354827

申请日：1927-01-25

申请人： MENDEL OSNOS

发明人： MENDEL OSNOS

IPC分类号： G01R19/06

CPC分类号： G01R19/06

公开(公告)号：US10193341B2

公开(公告)日：2019-01-29

申请号：US15524951

申请日：2015-11-25

申请人： Maschinenfabrik Reinhausen GmbH

发明人： Stefan Abelen ,  Daniel Preissler ,  Audrius Ilgevicius ,  Karsten Viereck ,  Tobias Wagner ,  Tobias Gruber

IPC分类号： H02J3/18 ,  H02J3/46 ,  G01R19/06

摘要： Transformers are in a parallel circuit in which a tap changer with a control sensor is associated with each of the transformers and all control sensors are connected together by a communications connection. Each control sensor generates a measurement that is transferred by the communications connection. A measurement is generated with each of the control sensors, and at least one of the measurements of the control sensors of the transformers by the communications connection is transferred to N−1 control sensors. Then a controlling deviation caused by a circuit reactive current is calculated for each control sensor on the basis of the measurements of the control sensors. Finally the tap changer associated with each transformer is actuated by the respective control sensor as a function of the calculated controlling deviation such that minimization of the circuit reactive current is carried out for the respective transformer.

公开(公告)号：US5717325A

公开(公告)日：1998-02-10

申请号：US583584

申请日：1996-01-05

申请人： Steven B. Leeb ,  Umair A. Khan ,  Steven R. Shaw

发明人： Steven B. Leeb ,  Umair A. Khan ,  Steven R. Shaw

IPC分类号： G01R19/25 ,  G01R21/133 ,  G01R19/06

CPC分类号： G01R21/1331 ,  G01R19/25 ,  G01R21/133 ,  Y04S20/38

摘要： A multi-processing transient event detector for use in a nonintrusive electrical load monitoring system has been provided. Templates of transient pattern data associated with each electrical load which may be monitored are stored. Such templates are then used to match and correlate with the actual monitored transient pattern data at the load site. The decomposition in which time scales are changed is accomplished in parallel along with one or more parallel event detection processing modules for each decomposition.

摘要翻译： 已经提供了用于非侵入式电负荷监测系统的多处理瞬态事件检测器。 存储与可能被监视的每个电负载相关联的瞬态模式数据的模板。 然后使用这样的模板来匹配并与负载现场处的实际监控的瞬态模式数据相关联。 时间尺度变化的分解与每个分解的一个或多个并行事件检测处理模块并行地完成。

公开(公告)号：US5539651A

公开(公告)日：1996-07-23

申请号：US164331

申请日：1993-12-09

申请人： Zivan Zabar ,  Ralph Mancini ,  Leo Birenbaum

发明人： Zivan Zabar ,  Ralph Mancini ,  Leo Birenbaum

IPC分类号： H02J3/01 ,  G01R19/06

CPC分类号： H02J3/01 ,  Y02E40/40

摘要： The present invention relates to a system and method for determining the effects of linear and nonlinear loads on electrical power systems. The invention utilizes stored load characteristic data in terms of current spectra at predefined voltage values and network impedances to determine the voltage drop between an electrical substation bus and an electrical load bus. The actual load voltage is determined by an iteration technique which takes the difference between a collected substation voltage and the voltage drop and compares the result of the difference to an estimated load voltage. For each iteration the estimated load voltage is re-estimated until the difference result equals the estimated voltage, thereby determining the actual load voltage. Knowing the actual load voltage, permits determination of actual current and power values which are compared to collected substation current and power values. If the values are equal, the effects of the harmonics are known. If the values are not equal, load composition data is adjusted and the system repeats the above until the values are equal.

摘要翻译： 本发明涉及用于确定线性和非线性负载对电力系统的影响的系统和方法。 本发明根据预定电压值和网络阻抗的电流频谱利用存储的负载特性数据来确定变电站总线和电负载总线之间的电压降。 实际负载电压由迭代技术确定，该技术取得收集的变电站电压和电压降之间的差值，并将差值的结果与估计的负载电压进行比较。 对于每个迭代，估计负载电压被重新估计，直到差值结果等于估计电压，从而确定实际负载电压。 了解实际负载电压，允许确定与收集的变电站电流和功率值进行比较的实际电流和功率值。 如果这些值相等，那么谐波的影响是已知的。 如果值不相等，则调整加载组合数据，并重复上述系统，直到值相等。

公开(公告)号：US4803423A

公开(公告)日：1989-02-07

申请号：US55659

申请日：1987-05-28

申请人： Pierre-Henri Boutigny

发明人： Pierre-Henri Boutigny

IPC分类号： G01R13/28 ,  G01R1/067 ,  G01R31/3177 ,  G06F11/25 ,  H03F1/30 ,  G01R19/06 ,  G01R19/00

CPC分类号： H03F1/303 ,  G01R1/06766 ,  G01R31/3177 ,  G06F11/25

摘要： A high frequency probe for a logic analyzer adapted to operate with different types of logic circuits, and signals which may or may not be superimposed on a dc component. After an input capacitance, a high frequency amplifier feeds both an output terminal and a compensator circuit which compares the deviation between low frequency or dc components appearing at the input and output terminals, and compensates for the deviation by reinjecting a signal at the input of the high frequency amplifier. Variable attenuation may also be also be included between the high frequency amplifier and the output terminal.

摘要翻译： 用于逻辑分析仪的高频探头适用于使用不同类型的逻辑电路，以及可能叠加在直流分量上或不会叠加在直流分量上的信号。 在输入电容之后，高频放大器馈送输出端和补偿电路，该电路比较输入和输出端出现的低频或直流分量之间的偏差，并通过在输入端输入端重新注入信号来补偿偏差 高频放大器。 可变衰减也可以包括在高频放大器和输出端之间。