Method in a cascaded two-level converter, control device and computer program products
US8400793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2009 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Apr 8, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for providing a switching order signal to a cell of a cascaded two-level converter is provided. The cell includes a capacitor parallel-connected with two series-connected semiconductor devices. The cascaded two-level converter includes two or more of the cells cascade connected and arranged in a phase, divided into two phase arms, between a first pole and a second pole of a direct voltage side. The method includes measuring voltages of the capacitor of the cell; calculating a compensated voltage reference based on a voltage reference and the measured voltages of the capacitors, wherein the voltage reference corresponds to a desired ac current to be output on an ac-side; using the compensated voltage reference to calculate a switching order signal, and providing the switching order signal to the cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.