Method and system for AC line distance protection in AC/DC hybrid power grid, and storage medium
US12040609B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 9, 2021 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Feb 9, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S10/52
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to a method and system for AC line distance protection in AC/DC hybrid power grid, and storage medium. The method comprises: collecting the operation parameters of inverter-side converter, AC parameters, converter bus voltage, current at distance protection installation and operation parameters of the smoothing reactor of inverter station; determining the conduction state of the inverter-side converter according to the operation parameters of the inverter-side converter; determining the current fed into the AC system from the DC system corresponding to the conduction state according to the operation parameters of the inverter-side converter, the operation parameters of the smoothing reactor of the inverter station and the converter bus voltage; determining the virtual fault location and virtual transition resistance according to fault types and AC parameters; controlling the corresponding protection device to perform the protection action according to the virtual fault location and virtual transition resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.