Fuzzy Based Interline Unified Power Quality Conditioner Using Ten-Switch Topology

Abstract

This paper proposes a new topological configuration for a unified power quality conditioner (UPQC) with fuzzy logic controller. The fuzzy controller is a rule based system with 0 and 1 operation with limited number of switches so it will reduce the power  losses and maintain the better power quality.  Here we are using the fuzzy logic controller. Such as, the fuzzy controller is the most suitable for the human decision – making mechanism , providing the operation of an electronic system with decisions of experts. Generally the structure of  three-phase-three-wire UPQC consists of two back-to-back connected six switch inverters.  But for this topology out of 12 switches, six of the series will be under-utilized most of the time. To improve the semiconductor utilization and consequently to reduce the total number of switches count, this topology proposes a new reduced switch topology for UPQC. This  paper is realized using only ten switches and retains all the performance merits of the twelve-switch UPQC while minimizing its underutilization without increasing the switch VA rating. The paper provides a detailed analytical study and evaluation by comparing the proposed topology with the twelve and nine switches based UPQC system configurations. The feasibility of the proposed topology is validated through simulation investigation.