本文旨在開發一由間接磁場導向感應馬達驅動之原動機模擬器。此感應馬達驅動系統可操控成速度模式之傳統原動機，或轉矩-速度模式之風渦輪機。在此兩模式下，變頻供電感應馬達驅動系統分別操作於速度控制模式以及直接轉矩控制模式。因此，為獲得較佳之間接磁場導向感應馬達驅動特性，本文提出改善之感應馬達參數估測技巧。實驗結果顯示，不同風速下之轉矩-速度曲線可被忠實呈現。
為從事所建原動機模擬器之加載測試，建立一具後接三相維也納升壓切換式整流器之內置磁石式永磁同步發電機。渦輪機接收機械能，並建立四百伏特之直流微電網共同匯流排。同時施行換相移位調適，以得內置磁石式永磁同步發電機之最佳產生功率。另外，亦採擾動觀察法從事風渦輪機模擬器驅動發電機之最大功率追蹤控制。而維也納切換式整流器之故障容錯操作，亦從事之。
為使所開發渦輪機模擬器可從電網供電且具良好之入電品質，構建一入電端之三相升壓型維也納切換式整流器。最後以一些實測結果，詳予評定所建切換式整流器供電風渦輪機模擬器之總體操控效能。
關鍵詞：原動機、風渦輪機、模擬器、感應馬達、磁場導向、內置磁石式永磁同步發電機、維也納切換式整流器、最大功率追蹤。

This thesis develops a prime mover emulator driven by an indirect field-oriented (IFO) induction motor (IM). The IM drive can be operated as a conventional prime mover in speed mode or a wind turbine in torque-speed mode. For these two modes, the inverter-fed IM drive is respectively operated under speed control mode and direct torque control (DTC) mode. To let the IFO IM drive possess satisfactory operating characteristics, the improved induction motor parameter estimation procedure is proposed. In the developed wind turbine emulator, experimental verification shows that different wind turbine torque-speed curves under various speeds can be faithfully emulated.
To conduct the loading test of the established prime mover emulator, an interior permanent-magnet synchronous generator (IPMSG) followed by a three-phase Vienna boost switch-mode rectifier (SMR) is constructed. It receives mechanical driven power from the turbine and establishes a 400V DC-link for DC micro-grid. The commutation tuning to optimize the IPMSG developed power is arranged. The maximum power point tracking (MPPT) of the wind turbine emulator driven IPMSG is achieved using the perturbation and observation (P&O) approach, and the fault-tolerant operation of the Vienna SMR are also conducted.
Besides, in order to let the developed turbine emulator be powered from the utility grid with good power quality, a source side three-phase Vienna boost SMR is also established. The whole SMR-fed wind turbine emulator driven IPMSG system is then completely evaluated.
Key words: Prime mover, wind turbine, emulator, induction motor, field-orientation, IPMSG, Vienna SMR, maximum power point tracking.

LIST OF CONTENTS
ABSTRACT i
ACKNOWLEDGEMENT ii
LIST OF CONTENTS iii
LIST OF FIGURES vii
LIST OF TABLES xiii
LIST OF SYMBOLS xvi
CHAPTER 1 INTRODUCTION 1
CHAPTER 2 INTRODUCTION TO WIND GENERATOR AND THE EMPLOYED ELECTRIC MACHIENS 5
2.1 Introduction 5
2.2 Micro-grid Systems 5
2.3 Wind Generator Systems 6
2.3.1 Wind Generators 6
2.3.2 Introduction to Wind Turbine 7
2.4 Induction Motors 10
2.4.1 Structure 10
2.4.2 Indirect Field-orientation 11
2.4.3 Key Issues of an IFO IM Drive 12
2.5 Permanent Magnet Synchronous Machine 18
2.5.1 Structure 18
2.5.2 Governing Equations 19
2.5.3 Estimation of Equivalent Circuit Parameters 21
2.5.4 Key Issues of a Wind PMSG 23
CHAPTER 3 INDUCTION MOTOR DRIVEN PRIME MOVER EMULATOR 25
3.1 Introduction 25
3.2 The Developed IFO IM Drive 25
3.2.1 System Configuration 25
3.2.2 The Employed IM and IPMSG 27
3.2.3 Voltage-source Inverter 29
3.2.4 Sensing and Interfacing Circuits 29
3.2.5 DSP TMS320F28335 31
3.2.6 Control Schemes 32
3.3 Conventional Turbine Emulator 33
3.3.1 IM Drive Starting Characteristics 34
3.3.2 IM Drive Speed Dynamic Responses 35
3.4 Wind Turbine Emulator 37
3.4.1 Control System Configuration 37
3.4.2 Observed Torque Controller 37
3.4.3 Mathematical Modeling of Wind Turbine 39
3.4.4 Experimental Results of the Developed IFO IM Driven
Wind Turbine Emulator 42
CHAPTER 4 PERMANENT-MAGNET SYNCHRONOUS GENERATOR FOLLOWED VIENNA SMR 44
4.1 Introduction 44
4.2 Development of a Wind IPMSG Followed by a Vienna SMR 44
4.2.1 System Configuration ........................ 44
4.2.2 Power Circuits ................................. 46
4.2.3 Circuit Operation ................................. 46
4.2.4 Single-phase Equivalent Circuit 49
4.2.5 Circuit Components Design 50
4.2.6 Simulated Results 52
4.2.7 Current Control Scheme 53
4.2.8 Voltage Control Scheme 53
4.3 Experimental Results of the Wind Turbine Emulator Driven IPMSG 56
4.3.1 Steady-state Characteristics 56
4.3.2 Measured Hall Signal and Speed 59
4.3.3 Effects of Winding Inductance 59
4.3.4 Dynamic Responses 61
4.4 Maximum Power Point Tracking Control of the Wind Turbine Emulator Driven IPMSG 62
4.4.1 Control Scheme 62
4.4.2 Maximum Power Point Tracking Control Algorithm 63
4.4.3 Experimental Evaluation 66
4.4.4 Dynamic Characteristics 67
4.5 Commutation Shifting of IPMSG 69
4.5.1 Basic Commutation Shifting 69
4.5.2 Intuitive Commutation Shifting 69
4.5.3 Experimental Results of Commutation Shifting 71
4.6 Fault-tolerant Operation 72
4.6.1 System Configuration and Control Scheme 72
4.6.2 Circuit Operation 73
4.6.3 Simulated Results 75
4.6.4 Experimental Results 76
CHAPTER 5 VIENNA SMR POWERED INDUCTION MOTOR DRIVEN WIND TURBINE EMULATOR 78
5.1 Introduction 78
5.2 Source-side Vienna SMR 78
5.2.1 System Configuration 78
5.2.2 Circuit Component Design 80
5.2.3 Control Schemes 81
5.2.4 Simulation Results 82
5.2.5 Measured Results 83
5.3 Vienna SMR-fed IFO IM Driven Turbine Emulator 86
5.4 Effects of Commutation Shifting 87
5.4.1 Control Scheme 87
5.4.2 Efficiency Estimation under Various Commutation Angles 87
CHAPTER 6 CONCLUSIONS 97
REFERENCES 98

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G. Efficiency Improvement
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