Control method and control system for modular multilevel converter and power transmission system
US11476773B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2021 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | May 30, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/4833
- 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 includes calculating an actual capacitor voltage of the sub-module; calculating a reference capacitor voltage of the sub-module; dividing the plurality of sub-modules into a plurality of modules, reference capacitor voltages of the sub-modules in the same module are the same, and reference capacitor voltages of the sub-modules from different modules are different; sorting in the module to obtain a first voltage sequence; sorting among different modules to obtain 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-module, 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 using a first preset value as a step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.