Business Green: Ofgem is to investigate complaints that green energy projects in Scotland and at sea are being unfairly penalised by its system for charging power companies to send electricity across the grid. The charges are seen as a significant barrier to the development of renewable energy projects. The energy regulator said today it would review the way it charges power companies different amounts based on how far the power station or windfarm is from London. Ofgem, which announced the …