The 121-mile, 345kV transmission line runs from Woodward to Oklahoma City and was approved by the Oklahoma Corporation Commission in 2008.

It connects OG&E’s new extra-high-voltage substation near Woodward with the company’s existing transmission grid. The new Woodward substation also will serve as a renewable energy transmission hub as more wind farms are developed in the area.

Pete Delaney, chairman, president and CEO of OG&E, said: “This is an important milestone in the ongoing development of renewable energy in our state.

”The new line supports a more robust build out of Oklahoma’s wind potential; producing revenue for landowners, creating jobs, increasing tax revenues in northwestern Oklahoma, and delivering renewable energy to Oklahoma consumers.”

Mr Delaney also noted that the $200m project was completed on budget.