It's also slightly tricky (understatement of the year competition) to hook up a 50Hz generator station to a 60Hz grid - if there are still 60Hz generators on th

It's also slightly tricky (understatement of the year competition) to hook up a 50Hz generator station to a 60Hz grid - if there are still 60Hz generators on that grid. What happens is that the rest of the country tries to back drive your generator + turbine at 20% over it's design speed - this is a bad thing (tm) It's hard enough phasing generators across the country when they are on the same frequency. The normal solution for long haul links, or links between different grids is to use a DC cable. The trouble is that people don't have spare Gigawatt AC:DC DC:AC converters lying around