PT ferromagnetic resonance elimination method implemented by actively inputting resistance through electronic load
US11824348B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2023 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | May 25, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to the technical field of potential transformer (PT) ferromagnetic resonance elimination, in particular to a PT ferromagnetic resonance elimination method implemented by actively inputting resistance through an electronic load, including the following steps: setting up a PT, and determining a mapping relationship; constructing a resonance elimination control system; and designing the electronic load as an active resonance elimination device. The present disclosure overcomes a contradiction between a magnitude of resonance elimination resistance and winding overload in a PT open delta during single-phase-to-earth fault and fault clearance, and effectively avoids the technical problems of difficult distinguishing between single-phase-to-earth fault characteristics and power frequency resonance characteristics and causing resonance in a single-phase-to-earth fault process. Compared with previous disclosure designs, the present disclosure directly measures parameters, and is simple in algorithm, low in computational complexity, rapid in arithmetic speed, high in precision and less in error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.