Modulation method for direct current (DC) coupling converter with less dc voltage sensors
US12418247B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 26, 2022 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Sep 26, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/4833
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A modulation method for a direct current (DC) coupling converter with less DC voltage sensors includes: obtaining a voltage modulated wave vr* and a current reference value ig* of the DC coupling converter; performing determination on the voltage modulated wave vr* and the current reference value ig*, and determining a switch state of the DC coupling converter based on a result of the determination; and when a DC voltage sensor of an electrolytic capacitor of an intermediate power module is removed, modulating a DC voltage sensor based on the voltage modulated wave vr* and a difference between DC voltages on electrolytic capacitors of the other two power modules. When the intermediate DC-side voltage sensor is removed, DC voltages of various modules of a converter system of a DC coupling power unit can still be balanced, and quality of a grid-connected current is not affected by a fault.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.