### Real-Time Implementation of a Type-2 Fuzzy Logic Controller on an On-Line UPS System

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#### Abstract

In this paper, a digital signal processor based real-time implementation of a type-2 fuzzy logic (T2FL) controller on an on-line uninterruptible power supply (UPS) is presented. The UPS consists of three main power circuits. Power circuits are non-linear structure and contain uncertainties. Conventional controllers cannot be enough to overcome uncertainties. In this study, type–2 fuzzy controller which has high performance for modeling uncertainties has been developed as control algorithm to control the UPS system. The system was also controlled with proportional–integral (PI) controller to show the superiority of the proposed type–2 fuzzy controller. When compared with the performance of both controllers in terms of their dynamic responses, it was observed that the T2FL controllers have faster dynamic response under transient loading conditions than PI controllers *Copyright © 2013 Praise Worthy Prize - All rights reserved.*

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