Ferromagnetic harmonic elimination method for active matched resistance voltage transformer based on PID adjustment
US11973337B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2023 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | Aug 17, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to the technical field of harmonic elimination for ferromagnetic resonance for a voltage transformer (abbreviated as PT), in particular, to a harmonic elimination method for ferromagnetic resonance for an active resistance-matching voltage transformer based on PID-adjustment, including compiling a resistance matching algorithm; designing and building a harmonic elimination control system based on the PID control strategy; presetting an active resistance-matching strategy; designing an engineering scheme for placing resistors. The present invention can solve the contradiction between the standards of the harmonic elimination resistance and the winding overload in the open triangle of the voltage transformer when the single-phase ground fault occurs and the fault is eliminated; avoiding the technical difficulties that the characteristics of single-phase ground fault and power frequency resonance are difficult to distinguish and the ferromagnetic resonance caused by single-phase ground fault; ensuring that the voltage transformer PT is not overloaded and burned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.