If shunt generator does not get its excitation power
, then the electrical power also does not exist. And if the winding excitation is wrong or reversed then there will be no electrical power from the generator. Shunt generator's voltage will drop if the load current is increased. This problem will not be found in compound generator which has two excitation amplifiers. The first amplifier is shunt while the second is series amplifier. In compound, strengthening the series winding will also increase the voltage if the current load is increased.