
342 Electrotechnical Systems
The third block in the turbine model is the speed controller. If the model scheme
is compared with that shown in Figure 6.27, one can see that the former has differ-
ence in the input part (as far as the amplier), which is shown in Figure 6.30. The
distinguishing features are an introduction of the dead zone Dz and addition of the
feedback by the steam stream in the rst section with the gain K
p
− 1. Note that when
Dz = 0, the gain from the amplier input to the signal owHP is equal to 1, but there
are a number of lags in the circuit, whose total equivalent time constant is denoted
asT. Designating as x the out ...