BigPatents India

A control system for regulated compensators of surplus reactive capacity of transmission lines comprising a reactor transformer (1) having three windings as main windings as primary ( 2), the control winding as secondary (3) and the compensating winding as tertiary (4), said control winding is provided with a tap (5) at 50% of its turn and is brought out with raultdblfi bushing for external connection, said 50% tapping of the control winding is connected in parallel with three sets of chokes (L1, L2, L3) which are individually connected in series with an anti parallel pair valve of thyristors (T1, T2, T3), the other ends o said thyristor valves are connected to the neutral end of the said control windings and the 100% end of said control winding is connected through another pair of anti parallel thyristor (T) the other end of which is connected to the neutral end of said control windings and a controlled shunt reactor controller ( 6) is provided for analog inputs of system voltage (V ), line load current (IL) and CSR current