Generator with utility fault ride-through capability

Details Generator with utility fault ride-through capability Generator with utility fault ride-through capability

2007-03-27

2008-03-04

Schuberg, Darren (Department: 2834)

Electricity: single generator systems

Automatic control of generator or driving means

Speed or frequency of generator

C322S020000, C322S028000, C290S055000, C290S052000, C290S044000

Reexamination Certificate

active

07339355

ABSTRACT:
A wind powered turbine with low voltage ride-through capability. An inverter is connected to the output of a turbine generator. The generator output is conditioned by the inverter resulting in an output voltage and current at a frequency and phase angle appropriate for transmission to a three-phase utility grid. A frequency and phase angle sensor is connected to the utility grid operative during a fault on the grid. A control system is connected to the sensor and to the inverter. The control system output is a current command signal enabling the inverter to put out a current waveform, which is of the same phase and frequency as detected by the sensor. The control system synthesizes current waveform templates for all three-phases based on a sensed voltage on one phase and transmits currents to all three-phases of the electrical system based on the synthesized current waveforms.

REFERENCES:
patent: 6930471 (2005-08-01), Sivasubramaniam et al.
patent: 6984898 (2006-01-01), Wobben

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