This document discusses a proposed Fuel Cell Integrated Unified Power Quality Conditioner (FCI-UPQC) system for improving power quality in a three-phase four-wire distribution grid. The FCI-UPQC uses a four-leg converter on the shunt side and three-leg converter on the series side. An adaptive neuro-fuzzy inference system controller is designed to maintain the DC link voltage. Simulation results in MATLAB/Simulink showed that the FCI-UPQC can effectively compensate for power quality issues like voltage sag, swell, harmonics, and neutral current imbalance. The inclusion of a fuel cell provides real power support during grid interruptions. The paper concludes that the proposed FCI-UPQC

1. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
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Fuel Cell integrated Unified Power Quality Conditioner for
voltage and current reparation in four-wire distribution grid
ABSTRACT:
Electrical and electronic devices when exposed to one or more power quality problems are prone
to failure. This paper aims to enhance the quality of power in three-phase four-wire distribution
grid using Fuel Cell Integrated Unified Power Quality Conditioner (FCI-UPQC). The proposed
FCI-UPQC has four-leg converter on the shunt side and three-leg converter on the series side. A
combination of a synchronous reference frame (SRF) and Instantaneous Reactive Power (IRP)
theories are utilized to generate reference signals of the FCI-UPQC. Also, this paper proposes
Adaptive Neuro-Fuzzy Inference System controller to maintain DC link voltage in the FCI-
UPQC. The Adaptive Neuro-Fuzzy Inference System controller is designed like a sugeno fuzzy
architecture and trained offline using data from the Proportional Integral (PI) controller. The
obtained results proved that the proposed FCI-UPQC compensated power quality problems such
as voltage sag, swell, harmonics, neutral current, source current imbalance in three-phase four-
wire distribution grid. The presence of fuel cell in this work makes more effectiveness of the
proposed system by providing real power support during supply interruption on the grid side.
SOFTWARE: MATLAB/SIMULINK
CONCLUSION:
In this paper, a novel utility of FCI-UPQC as a compensating and interconnecting device for a 3-
phase 4- wire distribution grid is extensively simulated in Matlab/Simulink. It was observed that
the proposed FCIUPQC efficiently compensates the problem of load current and supply voltage
imperfections with quick response and high reliability at the same time. The proposed system has
an enhanced performance under unbalanced, non-linear and sensitive linear load conditions. It is

2. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
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important to note that the proposed system still having challenge to mitigate source current
harmonics during source side disturbances and the type-2 ANFIS controlled FCI-UPQC is the
another scope for the future work.
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