397Electric Power Production and Transmission Simulation
switches have voltage rms value of 3.6 kV, and the output windings have the voltages
of 8.5, 17, 51 kV for the blocks a1, a2, a3, respectively, so that the phase rated voltage
is 76.5 kV; the total power is 24 MVA.
The subsystem of each phase consists of three single-phase (two arms) blocks
Universal Bridge with GTO-thyristors and the control system that realizes the
structure depicted in Figure 6.83. The block a1 switching frequency is 1 kHz; PWM
is the same as seen in the previous model.
The STATCOM control system uses the previously described principle of the
regulation of its current components I
d
, I
q
. The current controller output signals are
transformed in the three-phase signal ha ...