Wind power plant comprising a reactive power module for supporting a power supply system and corresponding method

US7741728B2 · kind B2 · utility

Assignee

• R E power Systems AG · DE

Inventors

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

Key dates

• Filing date: Sep 27, 2004
• Grant date: Jun 22, 2010
• Expiry date: Dec 23, 2025

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 wind turbine with a rotor and a generator driven by, the rotor generates electrical power and delivers it to a power system. A control unit controlling the operation of the plant includes a reactive-power control module. The control unit includes also a determining device for a safe minimum active power. Furthermore, and a limiting device for the reactive-power control module, wherein the reactive power is limited to such a measure that the safe minimum active power is still available, taking into consideration the available power. As a result, the total current generated, apart from the active current required for the safe operation of the plant, can be fed into the power system as reactive current as backup in the case of a voltage drop.