Excitation systems - compensated/non-compensated voltage

[tinrabuzin]

There is a possibility, in the PSS/E, to use the compensated voltage instead of terminal voltage of the generator as an input to the exciter. Related names of the signals are ECOMP and ETERM.

Those names are used interchangeably in our exciter models and it should be fixed. Most likely, some of the exciter models will not have a proper behaviour if the compensated voltage is used so this needs to be checked as well.