Multiport DC-DC autotransformer and methods for controlling and using the same
US9484826B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2015 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | May 13, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/49
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multiport DC-DC autotransformer for interconnecting three or more DC systems. The autotransformer includes 2N−1 converters sequentially connected in series at a DC side, and connected to an AC transmission line via an AC link at an AC side, and a positive terminal of the ith converter of the 2N−1 sequentially connected converters and a negative terminal of the (2N−i)th converter are respectively connected to a positive terminal of the ith DC system and a negative terminal thereof, where N represents the number of DC systems, and i represents the serial number of converters. Also disclosed are a method for determining power rating of each converter of the multiport DC-DC autotransformer, and a method for controlling the autotransformer. Most power can be transferred between different DC systems via a direct electrical connection without DC-AC-DC conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.