Single Phase Seven level multi inverter using cascaded system

This proposed inverter consists of an H Bridge circuit with 12 switching devices, three unequal sources and PWM generation circuit..Lcd is connected to show system parameters like voltage etc..Only one H-bridge is connected with three cells to acquire both positive and negative polarities.

Project Title

Single Phase Seven level multi inverter using cascaded system

Project Area of Specialization

Electrical/Electronic Engineering

Project Summary

1. Square wave inverter produces greater number of harmonics which produces heating effect and damage the appliances .
2. In Pakistan square wave inverters are traditionally used.
3. Improving power quality.

This proposed inverter consists of an H Bridge circuit with 12 switching devices, three unequal sources and PWM generation circuit..Lcd is connected to show system parameters like voltage etc..Only one H-bridge is connected with three cells to acquire both positive and negative polarities.

            The cascaded H-bridges multilevel inverter introduces the idea of using separate dc sources to produce an ac

This proposed inverter consists of an H Bridge circuit with 12 switching devices, three unequal sources and PWM generation circuit..Lcd is connected to show system parameters like voltage etc..Only one H-bridge is connected with three cells to acquire both positive and negative polarities.

            The cascaded H-bridges multilevel inverter introduces the idea of using separate dc sources to produce an ac voltage waveform. Each H-bridge inverter is connected to its own dc source Vdc. By cascading the ac outputs of each H bridge inverter, ac voltage waveform is produced. By closing the appropriate switches, each H-bridge inverter can produce five different voltages. 

voltage waveform. Each H-bridge inverter is connected to its own dc source Vdc. By cascading the ac outputs of each H bridge inverter, ac voltage waveform is produced. By closing the appropriate switches, each H-bridge inverter can produce five different voltages.

Project Objectives

The main objective is to introduce series H-bridge deisgn with three un equal DC sourcesThe higher number of output voltage levels has the ability to synthesize wave forms with better harmonics.Square wave inverter produces greater number of harmonics which produces heating effect and damage the appliances . In Pakistan square wave inverters are traditionally used.

Project Implementation Method

This is designed for simple house holds and for small factories like in kharian and faisalabad so that they can utilize it and can have better power quality in the end and because of it we will contribute in the economy of our nation.

Benefits of the Project

It is cost effective. It will increase the power quality in the end.

It will reduce harmonics and will bring stability.

Technical Details of Final Deliverable

The aim of this  is to design an inverter circuit with reduction of semiconductor losses, converter size and development cost. The H-bridge and auxiliary structures were considered in order to achieve seven levels output voltage. The performance of design circuit is compared with conventional seven levels structure in terms of voltage output. The circuit development consists of seven switches and three diode. A basic modulation technique is used to confirm the designed circuit. The results show that the designed circuit is able to convert seven level output voltage with low total harmonics distortion (THD) in voltage fundamental output. According to the results, fundamental output voltage is increased up to 8.314%, and the THD is decreased up to 0.81% compared to the conventional seven level inverter.

Final Deliverable of the Project

Hardware System

Core Industry

Energy

Other Industries

Others

Core Technology

Others

Other Technologies

Sustainable Development Goals

Affordable and Clean Energy

Required Resources

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