近年來隨著半導體功率元件與電力電子技術的進步，以二極體、閘流體等元件所組合成的前端整流電路已廣泛的使用於各式工業負載與民生必需用品中。此種前端整流電路具非線性負載的特性，導致電源端產生大量之諧波電流，因而造成電力系統中之諧波電壓及諧波電流的污染，導致電力品質下降。
為了解決諧波污染的問題，電力公司由輸配電系統的設計與保護協調方面來著手提升整個電力品質，同時也要求業界配合，採取各項補償措施，降低其所使用的負載對電力品質的影響。近年來，許多國家亦紛紛提出有關諧波問題的管制規範，如美國的IEEE-519，歐洲的IEC1000-3-2，及IEEC1000-3-4等。分別針對工業戶層次的三相負載或是消費者層次的低電壓小型負載提出管制要點。
另一方面，若以二極體或閘流體作為一變頻馬達驅動器之前端整流電路時，當馬達處於煞車狀態時，將有再生能量授至直流鏈，造成直流鏈電壓之上升，而危急周遭之電路元件。
為了解決諧波及再生能量的問題，本論文提出一以橋式整流器與IGBT輔助轉換器為主要架構之前端整流電路系統（簡稱DAXC系統），此系統具有並聯式主動濾波器與主動式前端整流器之功能，能夠改善負載啟動時所產生之電流諧波與負載在能量時再生能量之問題。本論文內容包含了DAXC系統之理論分析，模擬結果與實作結果。最後，本論文針對DAXC系統運用於可調速馬達驅動器之狀態進行模擬，並對其運轉效能加以分析、討論。

Due to the progress of power semiconductor technologies and power electronics technologies, applications of power converters have increased significantly in recently years, such as adjustable speed drive and switching power supplies. Most of these applications require diode rectifiers or thyristor rectifies to convert electric power from AC to DC. The nonlinear nature of the front-end rectifiers draws serious harmonic current from the utility grid, which results in harmonic distortion of current and voltage in the power system.
Several regulations have been passed at the commercial and industrial levels to reduce harmonic distortion, such as IEEE-519 of USA, and IEC-1000-3-2 of Europe. To meet these standards, the related technologies of harmonic filter have been proposed.
When the diode and thyristor are used as the AC/DC front-end rectifiers in the inverter-fed motor drive systems, they can not pump the re-generation energy back to the utility grid as the motor brakes. Thus the DC bus voltage will increase and the surrounding circuits may be damaged by over-voltage.
In this thesis, a re-generative front-end system based on the diode bridge rectifier and an auxiliary IGBT converter (abbreviated as DAXC) is presented. By utilizing the active filter control techniques, the auxiliary IGBT converter compensates the harmonic current of the diode rectifier load to reduce the harmonic current distortion. Besides, the IGBT converter provides the function of re-generation. This thesis includes the operation principles of the proposed DAXC system. Both simulation results and laboratory test results will be provided to validate the proposed system. Design example based on adjustable speed drive system is also provided.

誌謝 Ⅰ
中文摘要 Ⅱ
Abstract Ⅲ
List of Contents Ⅴ
List of Figure Ⅷ
List of Table XV
Chapter 1. Introduction 1
1.1 Harmonic Filtering 1
1.2 Re-generation 3
1.3 Motivation and Objectives 4
1.4 Organization of the thesis 5
Chapter 2. Literature Review 6
2.1 Introduction 6
2.2 Shunt active filters 6
2.3 Active front-end converter 11
2.4 Current regulator 13
2.4.1 Hysteresis current regulator 13
2.4.2 Synchronous Frame PI current regulator 15
2.4.3 Predictive current regulator 16
2.5 Summary 18
Chapter 3. Principle of Operation 19
3.1 Introduction 19
3.2 The DAXC controller 20
3.2.1 Active filter control principle 20
3.2.2 DC bus voltage control principle 23
3.2.3 Current regulator 24
3.4 Summary 27
Chapter 4. Simulation Results 29
4.1 Introduction 29
4.2 DAXC system simulation results without voltage distortion 31
4.3 DAXC system simulation results with voltage distortion 42
4.4 Summary 55
Chapter 5. Laboratory Test Results 57
5.1 Introduction 57
5.2 DAXC system laboratory test results 59
5.3 Summary 71
Chapter 6. Conclusion
Reference 79
Appendix A 82
A.1 Introduction 82
A.2 DAXC system simulation results in a 43 KVA load system 84
A.3 Summary 96
A.3.1 Operational loss estimation of the IGBT converter 98
Appendix B 100
B.1 Signal conditioning circuit for voltage measurement 100
B.2 Signal conditioning circuit for current measurement 100
B.3 The Phase Lock Loop (PLL) circuit 100
B.4 The DSP PWM signals control circuit 101
B.5 The IGBT gate driver circuit 101
B.6 The laboratory test bench 105
Appendix C 107

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