Patent ID: 7071579
Filing Date: 2006-07-04
Classification: F03D,F05B,Y02E

Abstract:
1. A wind farm comprising: a plurality of variable speed wind turbines, each of which comprises a multiphase generator that produces electrical output with varying frequency, and a power converter for converting said varying frequency electrical power into constant frequency power with a low pulse number, wherein each of said wind turbines produces multi-phase alternating current electrical output with a wave form consisting of a fundamental component and harmonics thereof; a turbine transformer at each of said wind turbines wherein the turbine transformer of at least one wind turbine shifts the phase of the voltage wave form of the output of said at least one wind turbine relative to the output of the other wind turbines; and an electrical collection system that aggregates the outputs of said plurality of wind turbines wherein said turbine transformers at said wind turbines perform phase multiplication on the output of said power converters to create a high pulse number approximation of a sine wave at an interconnection point with a utility grid and wherein one or more of the harmonic components of the outputs of said wind turbines are substantially canceled in said collection system.