A California-based energy company hopes to build the first transmission line directly connecting Texas to the Southeast as part of a plan to export the state's wind power to other parts of the country.

Pattern Energy Group recently won approval from the Federal Energy Regulatory Commission for the proposed 400-mile line, which the company estimates could cost $1.5 billion to $2 billion to build.

The project has the potential to expand the Texas wind energy industry by giving it access to another market via a route dubbed the Southern Cross, company officials said.