Harmonic analysis of diode clamped multilevel inverter base PEM fuel cell energy system

In distributed energy Fuel cell is one of the most valuable source in the renewable energy system because of its higher energy density, higher dependability and more life span due to no moving parts. These are popular because they can afford continuous power throughout the day in all seasons as long as the continuity of fuel cell supply is maintained compared to other renewable energy resources. In the fuel cell classifications proton exchange membrane fuel cell is a more convenient selection for distributed energy sources due to low temperature, fast reaction, and zero emission. The main aim of this work is to reduce harmonic distortion in entire system. Some multilevel converters are technically popular so that it is to integrate to fuel cell outputs, for reduction of harmonics and increase the efficiency. Diode clamped multilevel inverter is interfaced with proton exchange membrane fuel cell, and alternative phase opposition disposition technique is duration modulation switching technique used which employs diversified reference signals for the multilevel converter and reduce some of the harmonic content present in it. The remaining harmonics are mitigated by the low pass filter. This paper presents proton exchange membrane fuel cell with diode clamped multilevel inverter interconnecting to grid which reduces the Total Harmonic Distortion were performed and simulated in MATLAB/Simulink.

I. Introduction

Faster with time the expanding of electricity is increasing rapidly to meet human demands. for more than centuries we are generating electricity by various sources like Coal, oil, and other energy sources. In the present scenario natural electrical energy sources are swiftly depleting (oil, coal and natural gas) conventional fossil. Due to this fossil fuels usages are more, which causes nature environment problems like NO₂, CO₂, SO₂ air pollution are increasing. Hence best measures and precautions has to be taken. In order to overcome these type of problems, replacing fossil energy sources with nonconventional energy sources[1].