A Study On A New Circuit For Series Compensation

Thyristor controlled series compensation(TCSC) has the merit about controlling power flow,improving the system stability and increasing power transmission limit etc., and has the actual application. However, there is a parallel resonance field between inductive region and capacitive region, which demands controlling firing angle to avoid TCSC into resonance state. Against this disadvantage, this paper proposed a new method, which has the advantage of fast and continuously adjusting and there is no parallel resonance during the operation, to realize series compensation of transmission line. Using digital simulation (EMTDC/PSCAD) to study the basic principle,the operational mode of the circuit and the method of controlling the power flow.