Control Algorithms for Distribution Static Compensator

Reactive power compensation in a power distribution network plays a vital role in improving power quality, correcting power factor and maintaining constant distribution voltage. Among the various compensation devices available voltage source converter (VSC) based controllers offer very fast response to reactive power demand and thus can be effectively used for power factor correction and voltage regulation. One such VSC based controller called the distribution static compensator (DSTATCOM) proves to be a viable alternative to the conventional static var compensators (SVC). Further, the control algorithms applied to the DSTATCOM play a vital role in its performance. In this paper, the control algorithms applied to a DSTATCOM for reactive power compensation and power factor correction are reviewed and analyzed through digital simulations