By Andres Gonzalez LONDON (Reuters) – Spanish power company Iberdrola is looking to sell its onshore wind farms in Romania and Hungary as part of a strategy to raise cash to fund more lucrative renewable energy projects, two sources told Reuters. The sale is worth up to 300 million euros, the sources said. Iberdrola is selling fully operational assets to investors with a lower cost of capital in order to finance the development of new renewable projects and grids in its main markets Britain, the United States, Spain and Brazil. The sale is expected to kick off in the coming weeks and include s…