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Modeling and Simulation of Lead-Acid Storage Batteries within Photovoltaic Power Systems PDF

212 Pages·2012·1.94 MB·English
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An-Najah National University Faculty of Graduate Studies Modeling and Simulation of Lead- Acid Storage Batteries within Photovoltaic Power Systems By Ola Subhi Waheed Al-Qasem Supervisor Prof. Marwan Mahmoud This thesis is submitted in Partial Fulfillment of the Requirements for the Degree of Master in Clean Energy and Energy Conservation Strategy Engineering, Faculty of Graduate Studies, at An-Najah National University, Nablus, Palestine 2012 iii Dedication I would like to dedicate my thesis work to My father, mother, brothers and sisters…… All friends and colleagues… Everyone who works in this field…… iv Acknowledgment I would like to thank my family for constant love and support that have always given me. Thanks go also to all my friends and fellow graduate Students. My thanks and appreciations go to the staff of Clean Energy and Conservation Strategy Engineering Master Program at An- Najah National University Finally, and most importantly, my furthermost appreciation goes to my supervisor, Prof. Dr. Marwan Mahmoud for his exceptional guidance and insightful comments and observations throughout the duration of this project. Ola v ﺭﺍﺭﻗﻹﺍ :ﻥﺍﻭﻨﻌﻟﺍ لﻤﺤﺘ ﻲﺘﻟﺍ ﺔﻟﺎﺴﺭﻟﺍ ﺔﻤﺩﻘﻤ ،ﻩﺎﻨﺩﺃ ﺔﻌﻗﻭﻤﻟﺍ ﺎﻨﺃ Modeling and Simulation of Lead- Acid Storage Batteries within Photovoltaic Power Systems ﺔﻴﺴﻤﺸﻟﺍ ﺎﻴﻼﺨﻟﺍ ﺔﻤﻅﻨﺃ ﻥﻤﻀ ﺽﻤﺎﺤﻟﺍ – ﺹﺎﺼﺭﻟﺍ ﺕﺎﻴﺭﺎﻁﺒ ﺓﺎﻜﺎﺤﻤﻭ ﺔﺠﺫﻤﻨ ﺕـﻤﺘ ﺎـﻤ ﺀﺎﻨﺜﺘﺴﺎﺒ ،ﺹﺎﺨﻟﺍ ﻱﺩﻬﺠ ﺝﺎﺘﻨ ﻭﻫ ﺎﻤﻨﺇ ﺔﻟﺎﺴﺭﻟﺍ ﻩﺫﻫ ﻪﻴﻠﻋ ﺕﻠﻤﺘﺸﺍ ﺎﻤ ﻥﺄﺒ ﺭﻗﺃ ﺔﺠﺭﺩ ﻱﺃ لﻴﻨﻟ لﺒﻗ ﻥﻤ ﻡﺩﻘﻴُ ﻡﻟ ﺎﻬﻨﻤ ﺀﺯﺠ ﻱﺃ ﻭﺃ ،ﺔﻠﻤﺎﻜ ﺔﻟﺎﺴﺭﻟﺍ ﻩﺫﻫ ﻥﺃﻭ ،ﺩﺭﻭ ﺎﻤﺜﻴﺤ ﻪﻴﻟﺇ ﺓﺭﺎﺸﻹﺍ .ﻯﺭﺨﺃ ﺔﻴﺜﺤﺒ ﻭﺃ ﺔﻴﻤﻴﻠﻌﺘ ﺔﺴﺴﺅﻤ ﻱﺃ ﻯﺩﻟ ﻲﺜﺤﺒ ﻭﺃ ﻲﻤﻠﻋ ﺏﻘﻟ ﻭﺃ Declaration The work provided in this thesis, unless otherwise referenced, is the researcher's own work, and has not been submitted elsewhere for any other degree or qualification. Student's Name: :ﺔﺒﻟﺎﻁﻟﺍ ﻡﺴﺍ Signature: :ﻊﻴﻗﻭﺘﻟﺍ Date: :ﺦﻴﺭﺎﺘﻟﺍ vi List of Abbreviations Ah Ampere hour Wh Watt hour C Capacity AhC Ampere hour capacity WhC Watt hour capacity SOC State of charge DOD Depth of discharge V Open circuit voltage OC Ampere hour efficiency Watt hour efficiency SLI Starting, Lighting and Ignition VRLA Valve - Regulation Lead Acid vii Table of Contents No. Contents Page Dedication iii Acknowledgment iv Declaration v List of Abbreviations vi Table of Contents vii List of Tables x List of Figures xi Abstract xvi Chapter One: Introduction and Literature Review 1 1.1 Introduction 2 1.2 Literature Review 3 Chapter Two: Rechargeable battery 21 2.1 Rechargeable Battery Cells 22 2.2 Battery History 22 2.2.1 Early works 23 2.2.2 Development of Lead Acid batteries 24 2.2.3 Development of Nickel–Cadmium 26 2.2.4 Recent developments 27 2.3 Types and Characteristics of Secondary Batteries 28 2.3.1 Lead-Acid batteries 29 2.3.2 Alkaline secondary batteries 31 Why we Need Batteries Getting Unplugged: Portable 2.4 35 Energy and Long-Term Energy Storage 2.5 The Many Uses of Batteries 36 2.6 Battery Performance 39 2.6.1 Potential or voltage 39 2.6.2 Current 40 2.6.3 Resistance 40 2.6.4 Capacity 41 2.6.5 Power 42 2.6.6 Energy 42 2.7 General Battery Concepts 43 2.7.1 Batteries cells 43 2.7.2 Cell and battery voltage 44 2.7.3 Cell and battery capacity 44 2.7.4 Connecting cells to form a battery: series or parallel 45 2.7.5 Cell components 46 2.8 Voltage and Discharge Profiles 49 2.9 Effect of Discharge Rate on Performance 51 viii No. Contents Page 2.10 Effect of Temperature 52 2.11 Charge Retention (Self-Discharge) 53 2.12 Life 54 2.13 Charge Characteristics 56 2.14 Cost 58 General Information for Selection of Batteries for 2.15 59 Photovoltaic Systems 2.16 Key Elements in Battery Selection 60 Chapter Three: Lead Acid Battery 65 3.1 General Characteristics of Electrolyte Lead Acid Battery 66 3.2 Lead Acid Chemistry 68 3.3 Open-Circuit Voltage Characteristics 71 3.4 Self-Discharge 73 3.5 Discharge Characteristics 74 3.5.1 Discharge types 74 3.5.1.1 High-rate discharges 75 3.5.1.2 Medium-rate discharges 75 3.5.1.3 Low-rate discharges 75 3.6 Measures of Discharge Performance 76 3.7 Battery Voltage – General Overview 77 3.7.1 Mid-point Voltage 78 3.7.2 Battery discharge voltage as a function of discharge rate 79 3.8 Charging and Charging Equipment 80 3.8.1 General considerations 80 3.8.2 Methods of charging lead-acid batteries 82 3.8.2.1 Constant-current charging 83 3.8.2.2 Constant-potential charging 85 3.8.2.3 Taper charging 87 3.8.2.4 Pulse charging 88 3.8.2.5 Trickle charging 90 3.8.2.6 Float charging 90 3.8.2.7 Rapid charging 90 3.9 Maximum Battery Subsystem Voltage 91 3.10 Selection of Charge Current 92 Effect of Specific Gravity of Electrolyte and Operating 3.11 93 Temperature 3.12 Watering Cells 94 3.13 Maintenance Safety and Operational Features 95 Chapter Four: Nickel – Cadmium Batteries 100 4.1 Chemistry 102 ix No. Contents Page 4.2 Performance Characteristics 105 4.2.1 Discharge properties 105 4.2.2 Internal resistance 108 4.2.3 Charge retention 109 4.2.4 Life 110 4.3.1 Charging characteristics 110 4.3.2 Charging efficiency 111 4.3.3 Overcharge 113 4.4 Iron Electrode Batteries 114 4.4.1 Chemistry of Nickel – Iron batteries 116 4.4.2 Performance characteristics of Nickel-Iron battery 118 4.4.3 Discharge characteristics 120 4.4.4 Self-discharge 121 4.4.5 Internal resistance 121 4.4.6 Life 122 4.4.7 Charging 122 Chapter Five: Lead Acid Battery Characteristics 125 5.1 The Discharge Process under 8.4A Current Load 126 5.1.1 Voltage, specific gravity and state of charge 132 5.1.2 The battery internal resistance 135 5.1.3 Storage capacity and efficiency 136 5.1.4 Depth of discharge (DOD) 140 5.1.5 Battery completed discharged under 8.4A current load 143 5.2 Battery Charging Process 145 Developing an Algorithm for Determining the Battery – 5.3 154 Ah Capacity 5.4 Conclusion 158 5.5 Vents and Valves 159 5.6 Recombination Device 159 Chapter Six: Lead Acid Battery Equivalent Circuit 161 Model 6.1 Introduction 162 6.2 Battery Model 162 6.2.1 Battery model structure 163 6.3 Battery Simulink 182 Chapter Seven: Conclusions and Recommendations 187 7.1 Conclusions 188 7.2 Recommendations 189 References 190 ب ﺹﺨﻠﻤﻟﺍ x List of Tables No. Table Page Major characteristics and applications of Table (2.1) 38 secondary batteries Table (2.1) Cell voltage for different battery types 44 Major advantages and disadvantages of lead-acid Table (3.1) 67 batteries Table (3.2) Types and characteristics of lead-acid batteries 68 Table (3.3) Over view of lead acid battery attributes 71 Major advantages and disadvantages of industrial Table (4.1) 102 and aerospace nickel- cadmium batteries Table (4.2) Overview of nickel-cadmium cell attributes 105 Table (4.3) Iron electrode battery systems 115 Table (4.4) System characteristics 116 (12V/60Ah) lead acid battery behavior under Table (5.1) 128 (8.4A) discharge current (12V/60Ah) lead acid battery behavior under Table (5.2) 129 (6.2A) discharge current (12V/60Ah) lead acid battery behavior under Table (5.3) 130 (4.25A) discharge current (12V/60Ah) lead acid battery behavior under Table (5.4) 131 (2.2A) discharge current (12V/60Ah) lead acid battery completed Table (5.5) 144 discharged behavior under (8.4A) current (12V/60Ah) lead acid battery behavior during Table (5.6) 147 constant voltage charged process Table (5.7) Variables value needed to solve the equations 155 Measured and calculated parameters of a lead acid Table (5.8) battery rated at 12V / 60 Ah at 2.2A load current 156 discharged Measured and calculated parameters of a lead acid Table (5.9) battery rated at 12V / 60 Ah at 4.25A load current 157 discharged Measured and calculated parameters of a lead acid Table (5.10) battery rated at 12V / 60 Ah at 6.2A load current 157 discharged Measured and calculated parameters of a lead acid Table (5.11) battery rated at 12V / 60 Ah at 8.4A load current 158 discharged

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Faculty of Graduate Studies. Modeling and Simulation of Lead-. Acid Storage Batteries within. Photovoltaic Power Systems. By. Ola Subhi Waheed Al-
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