Fuzzy Logic Control Algorithm of Distribution Static Compensator for Power Quality Improvement

This paper is proposed to control a three-phase, fourwire distribution static compensator (D-STATCOM) based on Fuzzy logic control technique for peak detection of load currents for power quality improvement under linear/nonlinear loads. This control algorithm is accurate and simple to implement for real time applications in grid. In the proposed control algorithm using fuzzy logic based input and error in input are taken into consideration for required output with that estimation of active and reactive power components of load currents using low-pass filter and the voltage unit vector has achieved for power quality improvements. A four-wire D-STATCOM is analyzed for the compensation of linear and nonlinear loads using MATLAB/SIMULINK model design. The Performance of DSTATCOM is found quite satisfactory under balanced and unbalanced loads in three-phase, four-wire distribution system.