Abstract
In recent years, applications of inverter based power quality conditioners have been growing for reactive power compensation in distribution systems due to their faster response times as compared to the conventional compensators. Distribution Static Synchronous Compensator (D-STATCOM) is an inverter based power quality conditioner device used to improve the power quality issues in distribution systems. Control of D-STATCOM is usually realized by Proportional-Integral (PI) controllers with fixed parameters. However, the overall control performance may be unsatisfactory due to its nonlinear structure. In this paper, Fuzzy-PI controller which has a nonlinear and robust structure is proposed for control of D-STATCOM’s direct and quadrature axes currents. The article presents the fuzzy logic control of the D-STATCOM which tries to improve the damping of a power system. Simulation of Fuzzy-PI current controlled D-STATCOM is performed by MATLAB/Simulink software. In simulation study, the dynamic response of D-STATCOM is observed by changing the reference reactive current. A comparison of the simulation results between the proposed technique and the conventional PI controller has been presented.
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