Study of Shunt and Series Compensator for Improved VAR Compensation

Objectives: The FACTS devices plays vital role in compensating reactive power for increased power transmission capability and to maintain flat voltage profile in transmission system. The proposed 24 pulse VSC makes it possible to eliminate the need of external filters. Methods/Analysis: Power system performance improvement by effective management of reactive power is studied by designing the FACTS devices with the help of simulink in MATLAB. Findings: Reactive power control and stability of the transmission line is highly achieved by the STATCOM, a shunt compensator and SSSC, a series compensator. Reactive power control maintains constant voltage profile at all power transmission levels, thereby efficiency of transmission line, power factor and system stability is improved. Series and Shunt VAR compensation modifies the necessary electrical parameters of transmission line. Reactance parameter of the power system is modified by series compensation, while the equivalent load impedance is changed by shunt compensation. The results confirm that the need of external passive filter is eliminated. Application/Improvement: The system under consideration can be installed in any type of transmission system irrespective of energy generation method.