
The use of staged reactive power compensation banks such as Plain Capacitors, or Harmonic Filters, or TSC provides a flexibility of reactive power supply to match the demand of load. However in some cases, using a smooth transition between different levels of reactive power would be a more convenient way. The Thyristor Controlled Reactor comes up as a controllable inductive reactive power source at this point. It consists of inductors in series with thyristors as switches.