Detection of geomagnetically-induced currents with power line-mounted devices
US9217762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2015 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Jan 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for use in a power transmission system to sense GICs. The device may be a part of a reactance-injecting device on a power line, it may be a standalone device, or it may be a part of another type of device. The device may include a sensor to sense magnetic fields (e.g., a Hall effect sensor). The sensor may be positioned in the air gap of a magnetic core formed concentrically around the power line. The signal from the sensor may be converted to a digital signal and separately processed to determine the magnitude of the AC current and the magnitude of the DC (or quasi-DC) current. If the output signal of another A/C current sensor is available, that output signal may be used to adjust/calibrate the determined magnitude of the DC current. The sensor may communicate with other devices in a network to provide GIC information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.