ANALYSIS, SIMULATION AND COMPARISON OF CONVENTIONAL AND SVPWM ON STATCOM OPERATION WITH LINEAR LOADS IN POWER SYSTEM

In this paper the concept of SVPWM (Space Vector Pulse Width Modulation) is extended, in principle, for the inverter switching of a STATCOM (STATic synchronous COMpensator). As an important element of the STATCOM, the passive component plays an indispensable role in the process of active and reactive energy storing and exchanging. However the coupling of the AC inductance and DC capacitance may lead harmonic DC voltage or AC current at the output. The paper focuses the effect of increased modulation index and lower harmonic distortion has been studied through simulation w.r.t. different performance indices and dynamic response of relevant variables. A proportional integral controller has also been designed for closed-loop control of the system.