Design and Implementation of Grid Connected Inverter For Renewable Energy Sources

, M.Sc. Thesis Sharif University of Technology Ebrahimi Telemkhan, Javad (Author) ; Rajabi, Abbas (Supervisor) ; Imaneini, Hossein (Co-Advisor)

Abstract

Renewable energy sources have significantly used in recent years and the associated technologies have been widely developed. Grid connection of most renewable technologies, such as photovoltaic and wind turbine, is accomplished using power electronic converters. Control of injected active and reactive power as well as current and frequency control of is, so, implemented through the power converter. Inverter is among the equipments widely used for grid connection The purpose of this project was to design and develop an inverter for grid connection of renewable generation technologies for laboratory use. The inverter is aimed to control both injected active and reactive power. A full-bridge...

nvestigating and Using of an Optimal Controller for Parallel 3-Phase UPS

, M.Sc. Thesis Sharif University of Technology Nazaripouya, Hamid Reza (Author) ; Mokhtari, Hossein (Supervisor)

Abstract

In this thesis first of all the different approaches of control and parallel of multi-modular inverter system were investigated. These methods have been categorized and examined separately, and they were compared with each other in terms of quality and quantity. Afterwards, Active current sharing technique due to its high reliability was selected as the fundamental control approach. Among different ways for active current sharing, Avarage load sharing was chosen for its acceptable stability compared with other method. Approaching this goal, for the first time optimal control strategy and LQR method was proposed to parallel 3-phase inverters.At first, the problem was edited to be compatible...

Analysis of the Challenges in the Design of High Power and High Frequency Inverters

, M.Sc. Thesis Sharif University of Technology Amerian, Pourya (Author) ; Kaboli, Shahryar (Supervisor)

Abstract

Power Inverter or DC to AC voltage converter is one of the most important and widely discussed topics in the world of power electronics and systems such as DC/DC converters. Increasing the switching frequency of the inverter, in addition to its many advantages, also creates challenges that will be addressed in this dissertation. To build a high frequency yet reliable inverter, you need accurate and comprehensive information about the inverter circuitry, parasitic elements, switches and their behavior against fault conditions such as short circuit, protection requirements and etc.In this dissertation, several MOSFET transistors is shorted under various test conditions while parameters...