Sweden's energy agency, the Swedish National Energy Administration, said on Monday it had invested 6.3 million crowns ($0.7 mln) to expand windpower production in line with a goal to boost renewable energy.The projects Siral System & Co AB received the suport to build three wind turbines on the south eastern island of Gotland to produce about 10.3 terawatt hours (TWh), the administration said in a statement.