Continuous condition monitoring of transformers
US7961112B2 · kind B2 · utility
7Cited by
13References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2010 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Jan 22, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/62
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device and method for monitoring the condition of an electrical power transformer in an electrical power grid synchronously measures current and voltage data at both a high voltage side of the transformer and a low-voltage side of the transformer and computes from this measured data corresponding transformer impedance data. These measurements and computations are repeated continuously in real time at a rates up to 30 Hz to provide a sequence of real-time transformer impedance data. An alarm signal is generated if a mean of the sequence of real-time transformer impedance data changes significantly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.