Page 27 - Power Electronic Control in Electrical Systems
P. 27
//SYS21/F:/PEC/REVISES_10-11-01/075065126-CH001.3D ± 17 ± [1±30/30] 17.11.2001 9:43AM
Power electronic control in electrical systems 17
Fig. 1.14 Three-phase dynamic voltage restorer.
Fig. 1.15 Thyristor-based solid state switch.
Some loads draw constant current from the power system and their operation may
be affected by supply voltage and frequency variations. Examples of these loads are:
. induction motors
. synchronous motors
. DC motors.
