本文提出一創新型激磁式同步發電機之風力發電系統，應用於並聯與獨立型風力發電系統。在此創新系統中，利用同軸架構和相位追蹤技術，激磁式同步發電機和伺服馬達轉子速度追蹤電網的頻率與相位，以此方式發電機的轉速、電壓頻率以及相位跟隨市電電壓頻率，發電機的輸出功率可以直接傳輸到電網或獨立負載不需要外加電源整流器或逆變器。此外提出的功率控制策略管控發電機的激磁場電流以達成穩定電壓、最大功率追蹤及減少伺服馬達功率消耗。在獨立型應用中，當風力小於負載需求時，能量流管理系統會增加馬達扭力提供正向能量輸出給負載，反之在風力能量大於負載時發電機多餘的能量會被儲存到蓄電池中，馬達以最低能量保持系統穩定速度。本文藉由軟體模擬在大範圍輸入風力變動下測試系統的暫態及穩態響應。由雛型之實驗結果證明本創新風力發電系統具有高效能。

Abstract-This dissertation presents a novel wind power generator framework (WPGF) with an excitation synchronous generator for grid-connection and stand-alone applications. In proposed framework, the excitation synchronous generator and servo motor speed is designed to track the grid frequency and phase using coaxial configuration and phase tracking technology. The generator output voltage is controlled to be in phase with grid voltage, therefore the generator output power can thus be directly connected to the grid network or independent loading without additional power converter. The presented power control strategies govern the exciter current to achieve stable voltage, maximum power tracking, and diminishing servo motor power consumption. In stand-alone system, while the wind power is less than the needs of the consumptive loads, the proposed power flow management system (PFMS) increases motor torque to provide a positive power for the loads, meanwhile keeps the generator speed in constant. Conversely, during the period of wind power greater than output loads, the redundant power of generator production is charged to the battery pack and the motor speed remains constant with very low power consumption. The system transient and steady state responses over a wide range of input wind power are examined using simulated software. Experimental results from a laboratory prototype ESWPG demonstrate high performance of the proposed wind power generator.

中文審定書................................................i
英文審定書................................................ii
中文摘要.................................................iv
Abstract..................................................v
Table of Contents..........................................vi
List of Figures...........................................ix
List of Tables............................................xiii
Chapter 1 1
Introduction 1
1.1 Motive and Background 1
1.2 System Overview 2
1.3 Organization of the Dissertation 3
Chapter 2 5
Wind Power Generator System Development 5
2.1 Classification of Wind Generators 5
2.2 Classification of Generators 8
2.2.1 Asynchronous Squirrel-cage Generator 9
2.2.2 Doubly-fed Induction Generator 10
2.2.3 Direct-drive Permanent Magnet Synchronous Generator 11
2.2.4 Excitation Synchronous Generator 12
2.3 The Advantages of Excitation Synchronous Generator 13
Chapter 3 15
Excitation Synchronous Wind Power Generator with Maximum Power Tracking Scheme 15
3.1 Basic Principle 15
3.2 The Control System Framework 17
3.3 Robust Integral Structure Control 19
3.4 PM Synchronous Motor Model 22
3.5 Phase Tracking Control 28
3.6 Maximum Power Tracking Control 29
3.7 Simulation Results 31
Chapter 4 36
Stand-alone Excitation Synchronous Generator with Power Flow Management 36
4.1 The Structure of Stand-alone Wind Power Generator 37
4.2 Power Flow Management 40
4.3 Automatic Voltage Control Unit 43
4.4 Phase Tracking Control Strategy 47
4.5 Simulation Results 48
Chapter 5 52
Generator Mathematical Model and Matlab/Simulink Simulation 52
5.1 The Mathematical Model of Excitation Synchronous Generator 52
5.1.1 Stator Formulation 53
5.2 Mathematical Model of Grid-Connection and Loads 55
5.3 Simulation Results 57
5.3.1 Generator Model Confirmation 57
5.3.2 Phase Tracking Simulation 59
5.3.3 Power Factor Correction Simulation 62
5.3.4 Wind Speed Varying Simulation 63
Chapter 6 67
Experiments 67
6.1 The MCU Hardware 67
6.1.1 CPU Timer Module 68
6.1.2 ADC Module 70
6.1.3 ePWM Module 71
6.1.4 eQEP Module 72
6.1.5 General Purpose I/O (GPIO) 72
6.2 Experiment Platform 73
6.3 Control Circuits 76
6.3.1 Voltage Feedback Circuit 77
6.3.2 Current Feedback Circuit 78
6.3.3 Pulse Type Position Control Circuit 79
6.3.4 Power Contactor Control Circuit 80
Chapter 7 82
Results and Discussion 82
7.1 Grid-connection ESWPG 83
7.2 Grid Connection Responses 87
7.3 Stand-Alone ESWPG 88
7.4 Sub-Conclusion 92
Chapter 8 93
Conclusion and Future Works 93
8.1 Conclusion 93
8.2 Future Works 94
Reference 96

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