Spain's Gamesa, one of the world's top wind turbine groups, has won a contract to supply Chinese firm Longyuan with 50 Megawatts of power generating capacity, the company said Monday.

The turbines will be installed at a wind park operated by Longyuan, the world's number three wind farm developer, in Ningxia in northwestern China in June, Gamesa said in a statement, without providing financial details.

The contract follows a deal with Longyuan last year for an initial 50 Megawatts.

China accounted for 21 percent of Gamesa's total sales in the third quarter of 2011 and the company wants to boost this figure to 30 percent by the end of 2013.

Gamesa has installed nearly 3,000 turbines at more than 60 sites across China since 2000. It has six manufacturing plants in China, where it employs 1,200 people.

China, the world's most populous country, wants renewable energy sources such as wind to meet 15 percent of its power needs by 2020, double the share in 2005.