4. Implementation of SVC
Power system has many interconnections and bulk power transmissions over long distances. So, there is the inter area low frequency oscillation possibility. SVC can act swiftly to control the network condition. In the event of the fault, generators output power becomes very low. By rapid control of the voltage, the SVC increases the power transfer towards the system and thus reduces the accelerating area of the load angle. Thus the SVC can enlarge the decelerating area of load angle in the event of fault and can properly improve the transient stability [4], [5], [6], [7], [8] and [9].
In this work, the SVC is connected in shunt with each terminal of the P/Q (G1) and P/V (G2) generator as shown in Fig. 1. The SVC is connected as Fixed Capacitor-Thyristor Controlled Reactor (FC-TCR) as shown in Fig. 6. The firing angle of the thyristor is controlled in such a way that the capacitor bank will be connected with the generator terminals during the fault