Siemens has received a contract from Apex Clean Energy to deliver turbines for the 147MW Grant Plains wind farm in Grant County, Oklahoma, US.

Under the contract, Siemens will supply 64 of its SWT-2.3-108 wind turbines, each with 2.3MW of capacity and 108m of rotor diameter.

Siemens Wind Power and Renewables Division Onshore Americas CEO Jacob Andersen said: “We are very pleased to receive an additional order from Apex Clean Energy to supply turbines and service in Oklahoma, strengthening the state’s national leadership in wind energy.”

Siemens will also provide long-term service and maintenance for the wind turbines to help ensure reliability and availability. It will also provide remote monitoring and diagnostics services.

The wind turbines are part of Siemens’ new G2 platform for onshore geared products.

The new platform of G2 wind turbines are designed for low operational costs while enabling relatively higher return on investment.

IEA Renewable Energy, a unit of Infrastructure and Energy Alternatives, is the engineering, procurement and construction contractor for the project, which is scheduled to be commissioned in December 2016.

Meanwhile, US wholesale energy supplier Southern Power has acquired the Grant Plains project from Apex Clean Energy.

The acquisition is part of Southern Power’s plans to strategically grow renewable energy portfolio.

Southern Power president and CEO Buzz Miller said: "This project aligns with our business model and underscores our commitment to developing wind generation."

Southern Power earlier purchased two other developments in Oklahoma from Apex Clean. These projects include the 151MW Grant Wind and the 299MW Kay Wind.