Aclara Technologies, LLC

Tollgrade Communications, Inc.

Rebecca Webb Ross

Roger Astbury Smith

Regis J Nero, Jr

Christopher K Fleck

Timothy J Vitanza

David Haynes

Muhammad A Afzal

Venkat Pothamsetty

Christopher S Detka

Techniques for determining conditions of power lines in a power distribution system based on data collected by a plurality of sensor units deployed in the power distribution system. The techniques include obtaining data associated with measurements collected by at least two sensor units in the plurality of sensor units, and determining, by using at least one processor, at least one condition of at least one power line in the power distribution system by using the data obtained by the at least two sensor units.

Methods and apparatus for determining conditions of power lines

A node in a power distribution system is described. The node includes an electrical connection to a single-phase power signal from an AC mains power source, a wireless communication interface configured to receive a first phase synchronization message, and a controller. The controller is configured to determine whether the first phase synchronization message is acceptable and detect a zero-crossing event on the single phase power signal subsequent to the receipt of the first phase synchronization message in response to determining that the first phase synchronization message is acceptable. The controller is further configured to calculate a time difference between the receipt of the first phase synchronization signal and the detected zero-crossing event, determine a local phase angle based on the time difference, and establish an identity of the single phase power signal based on the local phase angle.

Phasor identification via synchronous messaging

Systems for determining a phase of a device coupled to an electrical distribution system. The system includes a number of gateway devices configured to transmit a synchronization signal. The gateway device receives a node response message from a first node device that includes a duration value indicating a time between a receipt of the transmitted synchronization signal and a detected zero crossing. The gateway device compares the duration value against duration values received from node devices with a known phase connection and determines a phase of the first node device based on the comparison.

Systems and methods for phase identification using relative phase angle measurements

Techniques for determining conditions of power lines in a power distribution system based on measurements collected by a plurality of sensor units deployed in the power distribution system. Techniques include obtaining first transformed data associated with a first set of one or more measurements collected by a first sensor unit in the plurality of sensor units and second transformed data associated with a second set of one or more measurements collected by a second sensor unit in the plurality of sensor units, and determining, by using at least one processor and based at least in part on one or more features calculated from the first transformed data and the second transformed data, at least one condition of at least one power line in the power distribution system.

A system for determining insertion loss of a telephone line under test (LUT) is responsive to electrical stimulation of an input of the LUT at each frequency of a first plurality of discrete frequencies for determining values of at least two of Rs, Cs, Rp and Cp at each frequency, wherein Rs and Cs represent an equivalent series RC input impedance of the LUT and Rp and Cp represent an equivalent parallel RC input impedance of the LUT. The system determines an insertion loss value of the LUT as a function of a value of one of Rs, Cs, Rp and Cp determined at one frequency of the first plurality of frequencies and a value of another one of Rs, Cs, Rp and Cp at another frequency of the first plurality of frequencies.

Apparatus and method for measuring loop insertion loss single-endedly

A system for determining insertion loss of a telephone line under test (LUT) predicts a length d of the LUT at each of a number of discrete frequencies. The system determines for each predicted length d a running standard deviation that is a function of the predicted length(s) d at and below the frequency where the predicted length d was determined; and determines a mean length (dm) of the LUT as a function of the lengths d of the LUT determined for each frequency at and below the pair of adjacent frequencies where the largest difference between running standard deviations occurs. The system determines a gauge of the LUT as a function of the running standard deviation the one of said pair of adjacent frequencies; and determines an insertion loss value of the LUT as a function of the gauge and the mean length dm.

The system and method of determining insertion loss of a telephone line under test (LUT) determines a first insertion loss as a function of plurality of different equivalent circuit values of the LUT determined at a plurality of different frequencies of a first set of discrete frequencies. A running standard deviation (rSTD) of a predicted length d of the LUT at each frequency of a second set of discrete frequencies is determined from the predicted lengths d of the LUT at and below said frequency. A second insertion loss is determined based on the pair of adjacent discrete frequencies of the second set of discrete frequencies that have the largest difference between their rSTDs. Based on a comparison of the first and second insertion losses to an expected insertion loss, one of these insertion losses is deemed to be the actual insertion loss of the LUT.

A delay-line time-domain reflectometer includes a return detector configured to process a discharge pulse produced by discharge of a line capacitor, formed by the physical relationship of a pair of conductive wires forming a telephone line, from a predetermined DC voltage. The return detector includes a number of neural networks configured to process the discharge pulse under the control of a controller. The neural networks enable the controller to characterize the loop configuration of the telephone line, where the loop configuration includes the length of the telephone line, the position of any bridged tap connected to the telephone line and/or the length of any bridged tap connected to the telephone line.

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Apollo, PA, United States of America

Rebecca Webb Ross