Control method and control system for modular multilevel converter and power transmission system
US11476774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2021 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Jun 23, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are a control method and control system for a modular multilevel converter and a power transmission system. The control method comprises: calculating an actual capacitor voltage and a reference capacitor voltage of the sub-module; dividing the plurality of sub-modules into a plurality of modules, wherein reference capacitor voltages of the sub-modules in the same module are the same, and reference capacitor voltages of the sub-modules among different modules are different; obtaining a first voltage sequence and a second voltage sequence; and determining the sub-modules to be switched on or switched off according to charging and discharging states of the sub-modules, the first voltage sequence and the second voltage sequence, until an actual level of the bridge arm is consistent with a desired level, wherein the desired level changes taking an insert value selected from a combination of one or more elements in a collection {INTERk} as a step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.