Grid active power filters using cascaded multilevel inverters with switching angle control
US9473042B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2015 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Mar 17, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Various methods and systems are provided for active power filtering utilizing cascaded multilevel inverters. In one example, among others, a grid active power filter includes a multilevel inverter including a plurality of series connected H-bridges and processing circuitry configured to control switching of the plurality of H-bridges. The multilevel inverter can be coupled to a point of common coupling between a grid and a load. The switching can be controlled based at least in part upon a number of individual harmonic currents drawn by the load. In another example, a method includes determining firing angles for each of a series of single phase H-bridges coupled to a PCC between a grid and a load, and adjusting firing of switches of the single phase H-bridges based upon the firing angles. The firing angles can be based at least in part upon a number of individual harmonic currents drawn by the load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.