Design of a Three-Phase Statcom-Based Inductive Static VAR Compensator Using DC Capacitor Voltage Control Scheme

By Abdulkareem Mokif Obais and Jagadeesh Pasupuleti


Abstract:
In this study, a three-phase continuously controlled harmonic-free inductive static VAR compensator is
presented. The compensator is built of a three-phase voltage source inverter based statcom. The phase currents of
this compensator are linearly and continuously controlled by the statcom DC capacitor voltage. The control strategy
is outlined by a process of forcing the capacitor voltage to follow a certain reference voltage which can be varied
linearly from its maximum to its minimum values to produce balanced three-phase inductive currents varying in the
range of zero to maximum value (IMAX). The proposed compensator was verified on the computer program PSpice.
Keywords: Controlled reactors, power quality, reactive power control