AUSTIN, Texas (AP) -

The chairwoman of the Public Utility Commission of Texas says federal subsidies for wind energy must be curtailed and developers should pay to strengthen the grid that brings wind power to market.

In a memo to fellow commissioners last week, Donna Nelson said renewable energy like wind and solar are "mature industries" that don't require further extensions of federal tax credits.

She said wind developers in Texas should "have skin in the game" in improving the delivery of their electricity.

Just a few years ago the PUC mapped routes for $6.9 billion in transmission lines to deliver wind power from West Texas to cities in Central Texas.

The shift by the PUC reflects efforts among conservatives nationally to cut federal investments in renewable energy.