Scotsman: SCOTLAND’S drive to develop new sources of renewable energy took a leap forward yesterday as the first tidal-power-driven electricity was connected to the National Grid. The milestone was achieved by OpenHydro, an Irish-based renewable-energy company, whose tidal turbine device was installed at the European Marine Energy Centre’s (Emec) test site off the island of Eday in Orkney two years ago. The single 250kW turbine can generate enough electricity to power only 100 homes, but …