Operating method for a wind turbine with a supersynchronous cascade
US7291937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2002 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Oct 31, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/76
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a wind energy system having a rotor that can be driven by the wind, preferably having one or more rotor blades that can be adjusted in angle, a generator directly or indirectly connected with the rotor, to generate electric energy, which is configured as an asynchronous generator having a super-synchronous converter cascade in the rotor circuit, for slip-variable generator operation, so that power output of the generator is possible at variable speeds of rotation of the rotor, and an operation guide system that is configured to regulate the speed of rotation of the rotor, within a predetermined wind speed range. To improve the energy yield, it is provided that the super-synchronous rectifier cascade is configured in the rotor circuit for feeding the slip power into the network. For this purpose, the super-synchronous converter cascade has a DC voltage intermediate circuit having a high-set element. These are configured to switch, as IGBT switches, with a 180 degree phase shift relative to the rotor voltage.Furthermore, the invention relates to a method for regulating the power output of the wind energy system, in that the slip is regulated, whereby the slip…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.