||Application of Bio-Inspired Intelligent Techniques to Multi-Objective Power Dispatch and Distribution System Operation Enhancement
||Department of Electrical Engineering
reactive power dispatch
enhanced dolphin echolocation algorithm
hybrid bird-mating optimization
This thesis endeavors to apply the bio-inspired intelligent techniques to optimize the multi-objective power dispatch and enhance the distribution system operation. With the aid of both enhanced dolphin echolocation algorithm and hybrid bird-mating approach, not only the appropriate decision of reactive power dispatch can be attained to reduce the power losses, minimize the voltage deviation, increase the voltage stability, but also mitigate the voltage unbalance caused by the grid-connected PV systems so as to ensure a satisfactory supplying-power. To evaluate the effectiveness of these proposed methods, they were evaluated through IEEE sample systems and practical ones with comparisons to other methods. Test results gained from this thesis have confirmed the feasibility of the proposed methods, thereby serving as beneficial references for electric power engineers and paving a road towards a power grid of high-quality.
List of Tables VII
List of Figures VIII
Symbols and Abbreviations X
Chapter 1 Introduction 1
1.1 Background and Motivation 1
1.2 Literature Survey 2
1.3 Contribution of this Thesis 3
1.4 Organization of this Thesis 4
Chapter 2 Problem Description 7
2.1 Introduction 7
2.2 Reactive Power Dispatch Problem 7
2.2.1 Minimization of Real Power Losses 7
2.2.2 Improvement of Voltage Profile 8
2.2.3 Enhancement of Voltage Stability 8
2.2.4 Equality Constraints 9
2.2.5 Inequality Constraints 10
2.3 Phase-Connection Adjustment Problem 11
2.3.1 Distribution Transformers in Low-Voltage Network 11
2.3.2 Mathematical Model of Photovoltaic Penetration 13
2.3.3 Formulation of Objective Function 14
2.3.4 Constraints 17
2.4 Overview of Bio-Inspired Intelligent Techniques 18
2.5 Summary 19
Chapter 3 Application of Enhanced Dolphin Echolocation Algorithm to Multi-Objective Reactive Power Dispatch Optimization 21
3.1 Introduction 21
3.2 Overview of Enhanced Dolphin Echolocation Algorithm 22
3.2.1 Multi-Objective Optimization Concept 22
3.2.2 Mathematical Model Formulation of Dolphin Echolocation Algorithm 24
3.2.3 Enhanced Dolphin Echolocation Algorithm 25
3.3 Computation Procedures of Enhanced Dolphin Echolocation Algorithm 28
3.4 Numerical Studies of Enhanced Dolphin Echolocation Algorithm 31
3.4.1 IEEE 57-bus Power System 31
3.4.2 A 69 kV 43-bus Taiwan Power System 34
3.4.3 IEEE 118-bus Power System 39
3.4.4 IEEE 300-bus Power System 42
3.5 Summary 44
Chapter 4 A Hybrid Bird-Mating Optimization Approach Applied for Reinforced Phase-Connection of Distribution Transformers Considering Photovoltaic System Penetration 45
4.1 Introduction 45
4.2 Overview of Hybrid Bird-Mating Optimization Approach 46
4.2.1 Bird-Mating Optimization 46
4.2.2 Hybrid Bird-Mating Optimization Approach 48
4.3 Computation Procedures of Hybrid Bird-Mating Optimization Approach 49
4.4 Test Results of Hybrid Bird-Mating Optimization Approach 51
4.4.1 Industrial Feeder with 5% PV Penetration 53
4.4.2 Commercial Feeder with 10% PV Penetration 58
4.4.3 Residential Feeder with various PV Penetration 63
4.5 Summary 69
Chapter 5 Conclusions 70
5.1 Conclusions 70
5.2 Future Study 71
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