Patent ID: 7999418
Filing Date: 2011-08-16
Classification: H02J,H02M,Y02E

Abstract:
1. A power generation system comprising: at least two electrical systems connected in parallel at an electrical connection point, each electrical system comprising a power conversion system comprising a DC-to AC converter including a plurality of switches for converting direct current power into alternating current power; and a control system including at least two pulse width modulation (PWM) modulators, each PWM modulator for obtaining a fundamental waveform and a carrier signal, using the fundamental waveform and carrier signal to generate a PWM pattern, and for providing the PWM pattern to a respective DC-to AC converter for driving the switches of the respective DC-to AC converter, wherein the control system is configured to interleave carrier signals, fundamental waveforms, or a combination of carrier signals and fundamental waveforms of the at least two electrical systems to generate interleaved PWM patterns respectively for the at least two DC-to AC converters, wherein each power conversion unit further comprises a generator side converter for converting alternating current power from a wind turbine generator into direct current power, and wherein the control system includes at least two turbine controllers respectively for the electrical systems.