Sorry to be a pain, but i have one final question regarding variable speed generators? Is it possible to use an already installed, synchronous generator as a variable speed synchronous generator, if you were to connect the existing synchronous generator to a “mini grid” at the power station and do the frequency regulation before it connects to the Main grid. So basically, the generator used in the variable speed generator setup can be a standard synchronous generator. There are no special features on the generator itself? Thanks so much, in advance