公开(公告)号：US20170315153A1

公开(公告)日：2017-11-02

申请号：US15651860

申请日：2017-07-17

Applicant: Itron, Inc.

Inventor： Timothy James Driscoll ,  Robert Sonderegger

IPC: G01R11/24 ,  G01R22/06 ,  G01R19/165

Abstract: Techniques for identifying electrical theft are described herein. In an example, a secondary voltage of a transformer may be inferred by repeated voltage and current measurement at each meter associated with the transformer. A difference in measured voltage values, divided by a difference in measured current values, estimates impedance at the meter. The calculated impedance, together with measured voltage and current values, determine a voltage at the transformer secondary. Such voltages calculated by each meter associated with a transformer may be averaged, to indicate the transformer secondary voltage. A transformer having lower-than-expected secondary voltage is identified, based in part on comparison to the secondary voltages of other transformers. Each meter associated with the identified transformer may be evaluated to determine if the unexpected voltage is due to a load on the transformer. If a load did not result in the unexpected secondary voltage, power diversion may be reported.

公开(公告)号：US20160320431A1

公开(公告)日：2016-11-03

申请号：US14702756

申请日：2015-05-03

Applicant: Itron, Inc.

Inventor： Timothy James Driscoll ,  Robert Sonderegger

IPC: G01R11/24 ,  G01R19/165

CPC classification number: G01R11/24 ,  G01R19/165 ,  G01R22/066

Abstract: Techniques for identifying electrical theft are described herein. In an example, a secondary voltage of a transformer may be inferred by repeated voltage and current measurement at each meter associated with the transformer. A difference in measured voltage values, divided by a difference in measured current values, estimates impedance at the meter. The calculated impedance, together with measured voltage and current values, determine a voltage at the transformer secondary. Such voltages calculated by each meter associated with a transformer may be averaged, to indicate the transformer secondary voltage. A transformer having lower-than-expected secondary voltage is identified, based in part on comparison to the secondary voltages of other transformers. Each meter associated with the identified transformer may be evaluated to determine if the unexpected voltage is due to a load on the transformer. If a load did not result in the unexpected secondary voltage, power diversion may be reported.

Abstract translation: 本文描述了用于识别电窃取的技术。 在一个示例中，可以通过在与变压器相关联的每个仪表处重复的电压和电流测量来推断变压器的次级电压。 测量电压值的差值除以测量电流值的差异，估计仪表的阻抗。 计算的阻抗与测量的电压和电流值一起确定变压器次级电压。 由与变压器相关联的每个仪表计算的这种电压可以被平均，以指示变压器次级电压。 部分地基于与其他变压器的次级电压的比较来识别具有低于预期的次级电压的变压器。 可以评估与识别的变压器相关联的每个仪表，以确定意外电压是否是由于变压器上的负载引起的。 如果负载没有导致意想不到的次级电压，则可能会报告功率分流。

公开(公告)号：US20160154040A1

公开(公告)日：2016-06-02

申请号：US14558571

申请日：2014-12-02

Applicant: Itron, Inc.

Inventor： Timothy James Driscoll ,  Hartman Van Wyk ,  Robert C. Sonderegger ,  Christopher M. Higgins

IPC: G01R25/00

CPC classification number: G01R25/00 ,  G01D4/002 ,  G01D4/004 ,  G01D4/006 ,  Y02B90/241 ,  Y02B90/242 ,  Y02B90/243 ,  Y02B90/246 ,  Y04S20/32 ,  Y04S20/322 ,  Y04S20/325 ,  Y04S20/42 ,  Y04S20/48

Abstract: Determination of electrical network topology and connectivity are described herein. A zero-crossing is indicated at a time when the line voltage of a conducting wire in an electrical grid is zero. Such zero-crossings may be used to measure time within a smart grid, and to determine the connectivity of, and the electrical phase used by, particular network elements. A first meter may receive a phase angle determination (PAD) message, including zero-crossing information, sent from a second meter, hereafter called a reference meter. The first meter may compare the received zero-crossing information to its own zero-crossing information. A phase difference may be determined between the first meter and the reference meter from which the PAD message originated. The first meter may pass the PAD message to additional meters, which propagate the message through the network. Accordingly, an electrical phase used by meters within the network may be determined.

Abstract translation: 本文描述了电网拓扑和连通性的确定。 当电网中的导线的线路电压为零时，表示过零点。 这样的过零点可用于测量智能电网内的时间，并确定特定网络元件使用的连接性和电相位。 第一仪表可以接收从第二仪表（以下称为参考仪表）发送的包括过零信息的相位角确定（PAD）消息。 第一台仪表可以将接收到的过零信息与其自己的过零信息进行比较。 可以在第一计量器和来自该PAD消息的参考计量器之间确定相位差。 第一个仪表可能会将PAD消息传递给附加的传感器，通过网络传播信息。 因此，可以确定网络中的计量表使用的电相位。