Digital modulation/demodulation with active monitoring for measurement of power factor and capacitance in high-voltage bushings, transformers, reactors, and other electrical equipment with high-voltage insulation
US11415619B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 11, 2020 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Jan 3, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/1227
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for measuring the integrity of insulation components in energized or de-energized electrical systems. Using a digital modulation/demodulation system, an active monitoring system adds a modulated high frequency signal to an injected signal and demodulates the resulting signal to provide voltages and currents that are measured and used to determine the capacitances and power factors of the insulation components. Systems may be used for on-line detection and measurement of power factor and capacitance of electrical equipment such as transformers, reactors, and condenser type bushings. The present disclosure is especially applicable to the electrical power industry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.