Protection system for devices in an electrical distribution network
US6297940A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Oct 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A computer-implemented protection system is used in a multi-phase electrical distribution network. The system includes a sensor operable to measure an impedance of a device connected to a phase of the distribution network. The device improves coupling of electrical potential from a source to a load. The system also includes a processor connected to the sensor and programmed to receive an impedance measurement from the sensor. The processor automatically calculates a variation in impedance of the device, the variation being based on a ratio of the impedance measurement and a previous impedance measurement. The processor automatically performs a protection analysis of the device based on the impedance variation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.