Nowadays the power consumption is increasing significantly. Due to this, the transmission lines are heavily loaded and in turn results in instability of the line. So orderly transmission of power is essential. For the proper operation of the load the voltage has to be maintained within the acceptable limit. Due to the changes in load, the voltage level of the line also changes. The voltage levels can be improved by using the reactive power compensator like capacitor banks, series compensator, STAT COM and svc. Here, we considered the SVC as reactive power compensator. This paper presents the reactive power compensation for a 230v transmission line model with variable inductive load using SVC and designed in Simulink. Here we considered the SVC model which contains of anti-thyristors in series to the inductor and a shunt capacitor. The required reactance is fed from the inductor to the transmission line by changing the gate triggering pulse to the thyristor pair. So, the main disadvantage of the open loop var compensation using svc is the triggering to the thyristor pair has to be changed every time depending on the load. This can overcome by implementing it using the feedback loop. Here for the feedback, we used the PI controller. under The PI controller gives the required gating pulse to the thyristor pair. The performance of this model is studied variable load conditions.
Optimal Reactive Power Compensation in Electric Transmission Line using STATCOM