Department of Electrical and Computer Engineering
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ADDIS ABABA UNIVERSITY ADDIS ABABA INSTITUTE OF TECHNOLOGY Department of Electrical and Computer Engineering Design of Standalone (PV/Micro-Hydro/DG) Hybrid Power Supply for off Grid Rural Community – A Case Study of Maji District (Tum) in South Nation Nationality People Region (SNNPR). A thesis Submitted to Addis Ababa Institute of Technology, School of Graduate Studies, Addis Ababa University in Partial Fulfillment of the Requirement for the Degree of Master of Science in Electrical and Computer Engineering (Electrical Power Engineering Stream) By: Emebet Tolcha Advisor: Dr - Ing. Fekadu Shewarega December, 2016 ADDIS ABABA UNIVERSITY ADDIS ABABA INSTITUTE OF TECHNOLOGY Department of Electrical and Computer Engineering Design of Standalone (PV/Micro Hydro/DG) Hybrid Power Supply for off Grid Rural Community – A Case Study of Maji District (Tum) in South Nation Nationality People Region (SNNPR). By: Emebet Tolcha APPROVAL BY BOARD OF EXAMINERS ______________________________ _______________________________ CHAIRMAN DEPARTMENT OF SIGNATURE GRADUATE COMMITTEE _____________________________ _______________________________ ADVISOR SIGNATURE _____________________________ _______________________________ INTERNAL EXAMINER SIGNATURE ____________________________ _______________________________ EXTERNAL EXAMINER SIGNATURE Declaration \ I, the undersigned, declare that this MSc thesis is my original work, has not been presented for fulfillment of a degree in this or any other university, and all sources and materials used for the thesis have been acknowledged. Name: Emebet Tolcha Signature: _____________ Place: Addis Ababa Date of submission: December, 2016 This thesis work has been submitted for examination with my approval as a university advisor. Dr - Ing. Fekadu Shewarega _________________ Advisor’s Name Signature Acknowledgements First of all, I would like to thank God for blessing me with ability to complete this work. This work couldn’t be complete without help and support of several people. My deep gratitude goes to my advisor, Dr.Ing Fekadu who has provided valuable Support, guidance and patience over the past years. I would like to thank my friends here in AAU and staff for their information and encouragement. I would also thank Dr. Ing Getachew Biru, for his precious time spent in discussions, valuable commenting, editing and generous assistance. My deep appreciations are for all of my family for their support, patience and encouragement. Thanks to everyone who has contributed to this work directly or indirectly. Emebet Tolcha December, 2016 Acknowledgements……………………………………………………………………...……..……i List of Figures…………………………………….……………………….…………………….…..iv List of tables……………………………………………………………………….……….…….….iv Nomenclatures…………………………………………………..………………………...….……...v Abstract …………………………………………………………………………………….….…...vii CONTENTS CHAPTER ONE ................................................................................................................................................................. 1 1.1 Introduction ................................................................................................................................................................. 1 1.2. Problem statement and motivation of the study ........................................................................................................... 1 1.3. Objectives ..................................................................................................................................................................... 2 1.3.1 General Objectives ............................................................................................................................................. 2 1.3.2. Specific Objectives ............................................................................................................................................ 2 1.4. Methodology ................................................................................................................................................................ 3 1.5. Origanization of the thesis ............................................................................................................................................ 4 CHAPTER TWO ................................................................................................................................................................. 5 2.1 Theoretical Back ground and Literature Reviews. ...................................................................................................... 5 2.2 Ethiopia: an over view ................................................................................................................................................... 5 2.2.1 Basic Information ............................................................................................................................................... 5 2.3.2 Electricity sector overview ................................................................................................................................. 5 2.3.Review OF Related Works ............................................................................................................................................ 6 2.4.Hybrid Power Systems .................................................................................................................................................. 7 2.5. Descriptions of hybrid power system components ....................................................................................................... 8 2.5.1. Micro-Hydro Power .......................................................................................................................................... 8 2.5.2. Solar Energy and Photovoltaic Technology .................................................................................................... 13 2.5.3. Diesel Generator .............................................................................................................................................. 21 2.5.4. Convertor ......................................................................................................................................................... 22 CHAPTER THREE ........................................................................................................................................................... 23 3. 1 Renewable Energy Resources Assessment, Load Estimation and Demand Projection .............................................. 23 3.2 Description Of The Area ............................................................................................................................................. 23 3.3 Electrification Scenario In Tum .................................................................................................................................. 24 3.3.1 Status Of Electricity In Tum Town .................................................................................................................. 24 3.4 Renewable Energy Resources Assessment of the area ................................................................................................ 25 3.4.1 Potential of Solar Energy.................................................................................................................................. 25 3.4.2 Solar radiation estimation ................................................................................................................................. 26 3.4.3 Small hydro potential assessment of tum ......................................................................................................... 28 3.5 Loads estimation and projection for tum town ........................................................................................................ 29 3.5.1 Identifying customer and Load Type ................................................................................................................ 31 3.5.2 Estimation of Primary Load ............................................................................................................................. 32 3.5.3 Diferrable Load. ............................................................................................................................................... 35 CHAPTER FOUR ............................................................................................................................................................. 36 4.1 Modeling A Hybrid For Techno-Economic Analysis By HOMER ............................................................................. 36 4.2 Homer Software Description ....................................................................................................................................... 36 4.2.1 Simulation Data ................................................................................................................................................ 37 4.2.2 Other important factors input to homer ............................................................................................................ 43 4.3 The hybrid system structure ........................................................................................................................................ 45 4.4 Homer simulation results and discussions ................................................................................................................... 46 4.4.1 Optimization result ..........................................................................................................................................