Wind energy installation having a double-energized asynchronous generator and converter control

US8400003B2 · kind B2 · utility

Assignee

• R E power Systems AG · DE

Inventors

• Heinz-Hermann Letas · Rosenfeld, DE
• Jens Fortmann · Berlin, DE

Key dates

• Filing date: Feb 18, 2009
• Grant date: Mar 19, 2013
• Expiry date: Apr 13, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E40/30
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A method for controlling a converter of a wind energy installation. The converter is connected to the rotor of a doubly-fed asynchronous generator in order to feed electrical power into an electrical grid and comprises a generator-side inverter, a grid-side inverter, and at least one converter regulator for regulating and/or controlling current output from at least one of the inverters to the doubly-fed asynchronous generator and/or to the electrical grid. The method includes detecting a change in output real power, determining whether the detected change satisfies a predefined condition, and changing a nominal value of reactive power to be output in an opposite sense to a change in real power at the grid-side inverter and in a same sense as the generator-side inverter when the predefined condition is satisfied.