الفهرس | Only 14 pages are availabe for public view |
Abstract The overall objective of photovoltaic and wind energy system is to obtain electricity from the sun and wind that are cost competitive and even advantageous with respect to other energy sources. Design of photovoltaic Wind Energy System Hybrid Electric Power System (PV/WES HEPS) has many issues if we take all economical and technical parameters into account. This thesis presents a complete design and simulation of a PV/WES HEPS to be interconnected with utility grid, UG. The proposed design of PV/WES HEPS is based on energy balance, minimum price of generated kilo watt hour (kWh), maximum power point tracking for PV and WES by using an artificial intelligence technique. In this thesis, novel computer programs are proposed to design a Photovoltaic system, wind energy system and PV/WES HEPS. These novel computer programs determine hourly system parameters such as optimum solar cells area, optimum number of inverter unit, total number of modules /subsystem, total number of parallel panel /string, total number of series module/panel , total number of modules, total number of WTGs, price of kWh ( ECF) produced form PV system and WES and reliability of the system. This thesis presents also a possible circuit topology and controller design for a grid-connected DC-AC power converter. In this thesis we present a study, describe a control strategy for interconnection of hybrid system with electric utility accompanied with or without battery storage using artificial intelligence techniques and also a fuzzy logic technique to calculate and assess the reliability index for each HEPS configuration under study. The computer programs can be applied to any site of the world. The development proposed package has been applied to Zafarâna site, Egypt as a case study. The thesis contains eight chapters which are summarized as follows: IV Chapter 1 presents the role and important need of renewable energies for todays and future, especially PV and wind energies. It presents also an introduction for renewable energies and previous work in the filed of the thesis. Chapter 2 introduces a proposed computer program for optimal design of a PV system to be interconnected with UG at M.P.P using neural network. It presents also methodologies for calculating the hourly solar radiation on tilted surfaces and design of each component of PV system. Chapter 3 presents an application of an artificial neural network on the strategy of the operation control of the PV/UG to improve system efficiency and reliability. It introduces also a complete computer simulation program of PV system interconnected with UG. Chapter 4 introduces a proposed computer program for optimal design of a WES to be interconnected with UG at M. P. P using neural network. It presents also a complete methodology to obtain an optimum design of WES interconnected with UG to supply a load at any site in the world. Chapter 5 introduces an application of an artificial neural network on the operation control of the WES/UG to improve system efficiency and reliability. It presents also a computer modeling, simulation, analysis of a variable speed WTG interconnected with UG. The computer simulation program is confirmed on a realistic circuit model which implemented in the Simulink environment of Matlab and works as if on line. Chapter 6 introduces a proposed computer program for optimal design of a PV system, WES and PV/WES HEPS to be interconnected with UG to feed a load demand at any site in the world. It presents an application of an artificial neural network (ANN) on the operation control and interconnection of the PV/WES interconnected with UG. Also it introduces a computer modeling, simulation, analysis of a HEPS interconnected with UG. |