Dynamic Voltage Compensator: Transformationless control perspective

The impact of voltage quality on the operation of sensitive equipment is very critical. Dynamic Voltage Compensator (DVC) is the prime solution to mitigate the voltage quality problems. This paper investigates the compensation performance of a DVC connected to a distribution system, equipped with a simple control based on in-phase compensation and without using any transformations for reference generation. The efficacy of the controller under steady state operation to mitigate voltage sag, swell and unbalance is analyzed through intensive simulation in MATLAB / SIMULINK. The present investigation is confined to balanced sinusoidal systems with a fixed balanced load. The transformation less approach leads to simple control with reduced computation.