One-power-point operation for variable speed wind/tidal stream turbines with synchronous generators

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One-power-point operation for variable speed wind/tidal stream turbines with synchronous generators

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Published

This study presents a new operating scheme for variable speed wind/tidal stream turbines employing synchronous generators. Current maximum power tracking schemes for variable speed wind energy conversion systems rely on periodic comparison of the output power for guiding the direction of maximum power tracking or an online algorithm which continuously provides a generator torque/speed reference corresponding to the maximum power status at different wind speed conditions. The proposed scheme utilises only one-power-point on the maximum power curve. Once the information for the maximum power status of a local wind speed is known, then the wind energy conversion system implements maximum power tracking and constant power control for different wind speed conditions using simple control. The operation strategy is applicable to tidal stream turbines. Simulation results demonstrate the concept.

Inspec keywords: wind power plants; power control; steam turbines; wind turbines; power generation control; torque control; velocity control; tidal power stations; maximum power point trackers; synchronous generators

Other keywords: maximum power tracking schemes; variable speed tidal stream turbines; one-power-point operation; constant power control; variable speed wind energy conversion systems; variable speed wind stream turbines; synchronous generators

Subjects: Control of electric power systems; Wind power plants; Power convertors and power supplies to apparatus; Velocity, acceleration and rotation control; Tidal power stations and plants; Synchronous machines; Mechanical variables control; Power and energy control; Steam power stations and plants

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