隨著傳統電力系統產業的日益變遷，由傳統電力產業進步至再生能源使用，而後再進步至智慧型電網實際應用，許多過去未被考慮到的議題未來可能會威脅到電力供應的可靠度。這個議題包含暫態和穩態穩定度問題，若無法解決這個問題可能會造成整個系統癱瘓。動態安全分析(DSA)已被採用來分析那些不穩定問題的影響。隨著近代的科技持續進步及先進量測設備的數量增加，這些工具可以評估目前電網穩定性且在某些情況下，可以在偶發事故之中提供舒緩或預防的控制。
本論文提供一個動態安全分析(DSA)的概念，其中包括穩定性評估及控制動作，從指定的可控制組中預先選擇可以舒緩潛在相角、電壓及頻率不穩定性的控制。這些動作可以分別對緩慢及快速的暫態現象進行控制：希望以比較低的成本，進行校正與緊急控制來降低影響。本論文主要目標是提供一個基於即時電網狀態估計(SE) 的方法來體現自動保護機制。

With the advent of changes in the traditional power system industry, such as the migration to renewable energy sources and subsequent smart grid implementation, new problems unconsidered before now threatens the electric supply reliability. Such issues include short and long term instability problems that could make the whole system to collapse if not addressed. The Dynamic Security Analysis (DSA) was adopted to counter the effects of these instability problems. Current technologies improvements and added value of more advanced measurements have brought attention to develop better DSA tools, which can assess the current reliability of the network and in some cases to provide a control to mitigate or to prevent consequences of such contingencies.
This work presents a concept of DSA that not only provides stability assessment but also provides control actions, from a preselected group of designated controls available, to mitigate the effects of the potential angular, voltage, and frequency instabilities. The actions are categorized in slow and fast short term phenomena: corrective and emergency controls strategies are calculated to reduce the effect of such events at a low cost. All of these efforts are driven to create a complete solution that embodies automated protections based on current network state using State Estimation (SE).

Abstract i
摘要 iii
List of Figures vii
List of Tables x
Nomenclature xi
Chapter 1: Introduction 1
1.1 Research Background and Motivations 1
1.2 Energy Management System Description 2
1.3 Security Analysis 6
1.3.1. Static Security Analysis 7
1.3.2. Dynamic Security Analysis 8
1.4 Summary of Previous Blackouts and Lessons Learned 10
1.5 Literature Survey 21
1.6 Scope of the work and Potential benefits of the concept 25
1.7 Organization of the Thesis 28
Chapter 2: Dynamic Security Analysis and Controls 29
2.1 Instability Problems addressed by Dynamic Security Analysis 29
2.2 Mitigation Strategies commonly available as network controls 30
2.3 Probabilistic Risk Assessment as Contingencies Selection Method 32
2.4 WAPS as Distributed Computation implementations of DSA 34
Chapter 3: Problem Formulation and Solution Methods 36
3.1 Problem Formulation 36
3.2 Instability Detection 42
3.3 Corrective Controls 47
3.4 Emergency Controls based on Latest SEPF LUT 53
3.5 Online Look-Up Tables Update 54
Chapter 4: Simulation Results and Discussions 58
4.1 Description of Test System 58
4.2 Simulation Procedure 63
4.3 Software Tools and Implementation 68
4.4 Experiments Setup 69
4.5 Simulation Results 70
4.5.1. Instability Detection 70
4.5.2. Corrective Control 71
4.5.3. Online Look-up Tables update & Emergency Control 86
4.5.4. Dynamic Security Analysis compared with System Protection Schemes 105
4.6 Discussions 109
Chapter 5: Conclusions and future work 111
5.1 Conclusions 111
5.2 Future work 112
References 114
Appendices 123
A.1 Useful Definitions 123
A.2 Test System Characteristics 126
A.3 Generators Average Dispatch Curves 132
A.4 Parser Utility Program 136
Acknowledgements 141

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