Patent
Variable trip fault indicator
TLDR
In this article, a fault circuit indicator is provided through a microcomputer-based fault current indicator design for power distribution system, where the microcomputer, and the software embedded therein, replace the functionality of numerous discrete, less reliable electronic components found in prior designs.Abstract:
In a power distribution system, a reliable, accurate, and energy efficient fault circuit indicator is provided through a microcomputer-based fault current indicator design. First, reliability is improved inherently because the microcomputer, and the software embedded therein, replace the functionality of numerous discrete, less reliable electronic components found in prior designs. Second, the embedded software is capable of placing the fault current indicator in one of a number of energy conservation states, without compromising the fault current indicator's ability to provide information relating to the occurrence of a fault. Finally, greater fault current indication accuracy is achieved by detecting excessive line current, followed by a significant drop in line voltage.read more
Citations
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Patent
Power line energy harvesting power supply
TL;DR: In this paper, a current transforming harvester (CTH) is proposed to produce power from a conductor on a preexisting power grid without alteration of the conductor or the preextending power grid.
Patent
Overhead communicating device
TL;DR: A power line monitoring device is mounted to a power line as discussed by the authors, and the ground reference point of the circuitry is electrically coupled to the power line, so that there is a substantially equalized or uniform electric field around the device.
Patent
Systems and methods for energy harvesting and current and voltage measurements
TL;DR: In this paper, a harvesting and measurement device is operable in at least a normal operation mode, a demand measurement mode, and a fault measurement mode; the device is able to harvest energy from an associated power line and monitor current and voltage conditions through a lower power circuit.
Patent
Adjustable overhead conductor monitoring device
Bruce W. Mcbee,Gregg James Haensgen,John Fredrick Banting,William J. Kostolni,Bryan C. Cochran +4 more
TL;DR: In this article, an apparatus is provided for securing to and collecting power from an electrical conductor, including a current transformer comprising a core and an electrical winding that receives an induced current from magnetic flux generated according to alternating current present on the electrical conductor.
Patent
Wireless transmission synchronization using a power line signal
TL;DR: In this paper, a gateway may determine a time delay from a zero crossing of a power line signal and obtain network information from the at least one faulted circuit indicator (FCI) from the plurality of faults.
References
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Patent
Method and apparatus for predicting electric induction machine failure during operation
TL;DR: In this article, a neural network is used to associate a spectral component with an operating condition of an in-service electrical motor, which draws a power load by monitoring spectral content of the power signature and associating spectral components with device operating conditions.
Patent
Method and apparatus for detecting high-impedance faults in electrical power systems
TL;DR: In this article, a method and apparatus for detecting and enabling the clearance of high impedance faults (HIFs) in an electrical transmission or distribution system is presented, where current in at least one phase is monitored in real time by sensors.
Patent
Differential protection device of a power transformer
Bastard Patrick,Hugues Regal +1 more
TL;DR: In this paper, a preprocessing circuit receives signals representative of a primary winding and of a current circulating in a secondary winding of a transformer, which are used to calculate the values of a through current and a differential current.
Patent
Method and apparatus for detecting a power line
TL;DR: In this article, a pickup coil was used to detect the magnetic field generated by the current conducted by a power line and for producing a sense current in response to the detected magnetic field.
Patent
Method for monitoring an electric motor and detecting a departure from normal operation
Thomas Petsche,Charles Garrett +1 more
TL;DR: In this article, a method for detecting a departure from normal operation of an electric motor comprises the steps of modelling a set of normal current measurements and the set of operational current measurements for the motor being monitored.