Building power plants in the middle of the sea was never going to be easy. The world’s largest developer of offshore wind farms Orsted A/S has found that some of its cables connecting to wind farms have been damaged by scraping against rocks on the seabed and will need to spend as much as 3 billion Danish kroner ($489 million) to fix them. It’s part of the growing pains for the offshore wind industry that’s become one of the fastest-growing sources of electricity. Offshore wind farms involve a network of turbines with cables that connect to shore and into the power grid. The open seas provide stronger and more consistent wind speeds than on land. Orsted’s Race Bank wind farm, off the east coast of England capable of powering about 500,000 homes, experienced a cable failure recently. […]