Method and system for adaptive single-phase reclosing of wind farm AC transmission lines
US12394979B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2024 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Nov 13, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2300/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to a method and system for adaptive reclosing of single-phase AC transmission lines in wind power systems. The invention utilizes single-ended electrical quantity to determine the type of fault. After a fault occurs, a signal acquisition device is used to sample the voltage of the fault phase. The obtained voltage is subjected to short-time Fourier transform to extract the amplitude of the fundamental frequency voltage component, and then processed with differential amplification to construct a fault nature identification criterion. Combined with a sliding time window for fault identification, if it is identified as a permanent fault, the reclosing device is locked out; if it is identified as a transient fault, the fault disappearance time is calculated to determine the reclosing time and output the closing signal. This invention is designed for adaptive reclosing after a circuit breaker trips in wind power AC transmission lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.