Direct-current power transmission power conversion device and direct-current power transmission power conversion method
US9755542B2 · kind B2 · utility
1Cited by
1References
13Claims
0Family size
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Key dates
| Filing date | May 19, 2015 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | May 19, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a power converter which performs power conversion between plural-phase AC and DC, variation in voltage of the DC capacitor in each converter cell is detected, and when the variation exceeds a predetermined value, a DC voltage command value as a control target value in a DC voltage control unit which controls DC voltage between DC buses is corrected by being increased or decreased. Thus, when AC grid failure occurs, the capacitor voltage of each converter cell is maintained and the operation continuity is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.