Ride-through and recovery method for DC short circuit faults of hybrid MMC-based HVDC system
US9627956B2 · kind B2 · utility
1Cited by
2References
5Claims
0Family size
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Key dates
| Filing date | Feb 12, 2015 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Apr 18, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ride-through and recovery method for DC short circuit faults of a hybrid modular multilevel converter based high-voltage direct current transmission (MMC-HVDC) system, the hybrid MMC including multiple full-bridge sub-modules and half-bridge sub-modules, and the method including: 1) detecting whether a DC short circuit fault occurs, and proceeding to step (2) if yes and continuing detecting if no; 2) realizing ride-through of the DC short circuit fault; 3) detecting whether a DC residual voltage increases, and proceeding to step (4) if yes and continuing detecting if no; and 4) realizing DC short circuit fault recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.