Reuters: Danish state-controlled oil and natural gas group DONG Energy said on Friday it had awarded Siemens a supply contract for up to 500 offshore wind turbines with a total capacity of up to 1,800 megawatts. The wind turbines will be deployed on DONG Energy’s coming offshore wind farms in Northern Europe, the company said in a statement. DONG said the supply agreement was the biggest single order ever for offshore turbines. DONG Chief Executive Anders Eldrup told Reuters it was …