Dual UPQC Converter Grid Systems for Effective Regulation of Load

Naresh Donthukurthi, Y. Veerraju


This paper presents a simplified intelligent control technique for a dual three-phase topology of a unified power quality conditioner iUPQC. The i-UPQC is composed of two active filters, a series active filter and a shunt active filter (parallel active filter), used to eliminate harmonics and unbalances .This paper explains an enhanced Fuzzy controller for the dual topology of the unified power quality conditioner (iUPQC) expanding its pertinence in power quality compensation, and additionally in microgrid applications. Implementation of intelligence controller by using voltage as feedback for significantly improving the dynamic performance of UPQC, the comparative analysis of several control strategies fed UPQC for power quality improvement features is presented. Fuzzy control has emerged as one of the most active and prolific areas for research in the applications of fuzzy set theory, especially in the realm of industrial process, which do not lend of quantities data regarding the input-output relations. By using PI controller, beyond the conventional UPQC power quality features, including voltage sag/swell compensation, the iUPQC will also provide reactive power support to regulate not only the load-bus voltage but also the voltage at the grid-side bus. In other words, the iUPQC will work as a static synchronous compensator (STATCOM) at the grid side, while providing also the conventional UPQC compensations at the load or microgrid side. By using Fuzzy logic controller also we have the same functioning of iUPQC and additionally the harmonics are reduced. Here three different cases are taken into consideration considering loads. Comparison  results are validated with the tabular form. Simulations results are provided to verify that fuzzy logic controller is better than PI controller using MATLAB/ SIMULINK software.

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