STATCOM is based on a solid state synchronous voltage source that is analogous to an
ideal synchronous machine except the rotating part. It generates a balanced set of
sinusoidal voltages at the fundamental frequency with rapidly controllable amplitude and
phase angle. As shown in Figure 2.3, STATCOM is the voltage-source converter, which
converts a DC input voltage into AC output voltage in order to compensate the active and
reactive needed by the system. The reference signal Qref and Pref can control the amplitude
V and phase angle β of output voltage, respectively.