Loading patent…
AssigneeABB Schweiz AG
InventorsLorenzo Giuntini, Andrea Mannuccini
Estimating the term…
A control system and methods for a multilevel power converter are provided. The converter includes a rectifier coupled to a DC link having a midpoint coupled to electrical ground that divides the DC link into two halves. The control system is configured to generate a reference current command for controlling an output of the rectifier, the reference current command generated based on a difference between a desired and measured DC link voltage value. The system is also configured to determine a zero-sequence current component of input current supplied to the multilevel power converter, wherein the zero-sequence current component is associated with non-linearities in said multilevel power converter that cause ground current injection into the input current by the rectifier. The system is further configured to subtract the determined zero-sequence current component from the reference current command to reduce the ground current injected into the input current by the rectifier.
A control system for a multilevel power converter having a rectifier coupled to a direct current (DC) link, the DC link including a midpoint coupled to electrical ground that divides the DC link into two halves, said control system comprising a processor coupled to a memory device, said control system configured to:
A method of controlling a multilevel power converter having a rectifier coupled to a DC link, the DC link including a midpoint coupled to electrical ground that divides the DC link into two halves, said method implemented by a processor coupled to a memory device, said method comprising:
Dependencies are inferred from the claim text.