Identification of false positives in high impedance fault detection
US8680872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2009 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Nov 29, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S10/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method, system and computer program product are disclosed for identifying false positive indications of high impedance faults in an AC electric power transmission and distribution network. In one embodiment, the method comprises using a procedure to monitor a phase conductor of the network for faults, said procedure generating a fault signal indicating a specified fault in the conductor. In this embodiment, the voltage and current waveform of the electric power conducted through the conductor are monitored. When a phase shift in said waveform is detected over a defined period of time, and said detected phase shift meets one or more given criteria, a correction signal is generated indicating that said fault signal is a false indication of the specified fault. The given criteria may include, for example, that the phase shift is more than a threshold value for a specified period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.