Precise Control

The company's new turbine offers ROI in just four years.

"The HWT60 is designed to optimise the blade power output by changing rotor speed to reflect changing wind conditions,” explains Dave Harbon, technical director. "This is why we use a variable speed drive in regeneration mode to return the generated power to the mains grid. We use Control Techniques’ drives because their efficiency, considerable programming capability and communications give us the precise control that we need.”

Each turbine is fitted with four AC drives from Control Techniques. Two small 0.5kW Unidrive SP AC drives are fitted at the top of the tower, one controlling yaw (to turn the turbine into the wind) and the other controlling the hydraulics for the braking system.