Multi-level Inverter

dc.contributor.advisorRaed Jaber
dc.contributor.authorAnas Ibrahim
dc.contributor.authorWaleed Barri
dc.contributor.authorYazeed Hawasheen
dc.description.abstractabstractDue to the energy shortage, the integration of renewable energy sources to the electricity grid becomes an interesting research topic nowadays. The number of renewable energy sources and distributed generators is increasing very fast which also brings some threats to the power grid. In order to maintain or even to improve the power supply reliability and quality of the power system with distributed generation, it is necessary to have some new strategies for the operation and management of the electricity grid. Modern power electronic technology is an important part in distributed generation and the integration of the renewable energy to the power grid. It is widely used in the grid based system.Since the output power of micro-sources (photovoltaic, wind energy etc.) is more dependent on the environment condition such as irradiance and wind,it is necessary to use some specific control strategies or to have some energy storage system (battery, super-capacitor etc.) in order to compensate for the fluctuations.One traditional way is to use different kind of converters to integrate the micro-sources, energy storage and different types of loads into a common DC bus.Power electronic converters, especially DC/AC Sinusoidal selective harmonic elimination Modulation inverters have been extending their range of use in industry because of their numerous advantages. They typically synthesize the stair case voltage waveform (from several dc sources) which has reduced harmonic content. This project aims to extend the knowledge about the performance of five and nine level Cascaded H-Bridge multi-level inverter topology. The output voltage is the sum of the voltage that is generated by each bridge. The switching angles can be chosen in such a way that the total harmonic distortion is minimized. Using multi-level inverter will obviate the use of filter.This project concentrates on the analyses of power losses due to the harmonics and also due to switching losses in both five and nine level inverter, to illustrate the benefits of increasing the number of levels, And illustrates the effect of harmonics in a single phase induction motor (capacitor start motor) the main effect of harmonics in electric machine is rising the temperature due to the increasing of power losses, Matlab Simulink used to illustrate this idea and also focused on torque ripple due to fifth and seventh harmonics.To solve the problem mentioned above, this project introduces a new idea (harmonic elimination method) to eliminate the harmonics or to reduce it as possible in order to decrease the power losses,In this project we also select the suitable components according to equations that developed by manufacturing companies.     en
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dc.titleMulti-level Inverteren
dc.titleMulti-level Inverterar
dc.typeGraduation Project
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