Neutral point clamped power converter fault detection, identification, and protection
US8472153B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2011 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Feb 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/1216
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fault detection, identification, and protection system for a phase leg of a three-level neutral point clamped (NPC) power converter includes a fault detection circuit, the fault detection circuit configured to determine, based on signals received from the two inner switches and two outer switches via their respective gate drivers, the presence of a fault in the phase leg; a fault identification circuit, the fault identification circuit being configured to determine, based on signals from the fault detection circuit, a location of the fault in the phase leg; and a protection circuit, the protection circuit being configured to turn off at least one of the inner switches or outer switches in response to the identification of the location of the fault by the fault identification circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.