Genetic and Evolutionary Algorithms for PSP - Digital Signal Processing in Power System Protection and Control - page 285

0.98

0.96

0.94

Q eff_max

0.92

Q

eff_av

0.9

0.88

0.86

0.84

0.82

0.8

0.78

0 5 10 15 20 25 30 35 40 45 50

Generation number

Fig. 13.11 Optimization process for the algorithm R2 (see Table 13.1 )

Fig. 13.12 Synchronous
machine with local control

Generator

Turbine

Governor

ω

g

U

gov

ω

ref

Exciter

U

exc

AV R

V

rms

PSS

V

ref

13.2.2 Optimal Selection of the Generator AVR Settings

The basic control of a synchronous generator includes voltage regulator and tur-
bine-governor units (Fig. 13.12 ). The automatic voltage regulator (AVR) adjusts
the power output of the generator exciter in order to control the magnitude of
generator's terminal voltage. The turbine-governor, on the other hand, adjusts the
steam-valve position to control the mechanical power output of the turbine [ 2 , 10 ].
The main attention is paid here to voltage regulator units that are intended to be