Design of a Linear Synchronous Reactor using a DC Voltage
Controlled Statcom
By Abdulkareem Mokif Obais and Jagadeesh Pasupuleti

Abstract
In this paper, a single-phase linearly and continuously controlled synchronous
reactor is presented. It is a harmonic-free single-phase statcom. The statcom is constructed
of a full bridge voltage source inverter shunted by a DC capacitor and absorbs reactive
power from the AC supply through a somewhat small series reactor. The statcom current is
controlled linearly by its DC capacitor voltage. The controlling process is achieved by
forcing the capacitor to discharge through a boosted up energy tank when its voltage is
exceeding the required value and forcing the tank to recharge the capacitor when the
capacitor voltage starts to decline. The DC capacitor voltage control in this paper is carried
out without needing to external voltage sources. The compensator design is validated on
PSpice.