本文主旨在設計一個數位式市電並聯型換流器，使其能與市電並聯供電，而達到分攤負載用電的問題。其設計輸出功率為300 W，單相交流110 V的系統。換流器的功率電路方面是以全橋式作為換流器架構，全橋架構可隔離一、二次測，使得控制電路側不會因功率電路的影響而燒毀。而在控制電路上使用德州儀器所生產的DSP TMS320F2812，它具有高速運算的能力，使整個控制器能夠更有彈性。

The purpose of this thesis is to develop an inverter with grid-tied that can provide energy to share load with utility grid. The output power of inverter is 300 W and AC 110 Vrms for single phase. A full-bridge inverter with transformer, isolating primary and secondary side which can protect control circuit and avoid being burned when power stage has faults.
A DSP of TI TMS320F2812 which is used to control the inverter in this thesis has high speed calculating function and make all control circuits flexible.

TABLE OF CONTENTS
ENGLISH ABSTRACT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I
CHINESE ABSTRACT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II
ACKNOWLEDGEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III
CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV
LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
LIST OF TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VI
1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Organization of the Thesis . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 BASIC CONCEPTS OF GRID-TIED INVERTER . . . . . . . . . . . . . . . 3
2.1 Basic Concepts of Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Types of Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Basic Types of Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4 Full-Bridge Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
IV
2.5 Sinusoidal Pulse Width Modulated Inverter . . . . . . . . . . . . . . . . . 6
2.6 Bipolar Voltage Switching . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.7 Unipolar Voltage Switching . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 SYSTEM SIMULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Design of Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 EXPERIMENT CONFIGURATION AND RESULTS . . . . . . . . . . . . . 21
4.1 A Full-Bridge Inverter Structure . . . . . . . . . . . . . . . . . . . . . . . 21
4.2 The Basic Block Diagram for Hardware . . . . . . . . . . . . . . . . . . . 24
4.2.1 IGBT Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.2.2 Voltage Feedback Detect Circuit . . . . . . . . . . . . . . . . . . . 26
4.2.3 Current Feedback Detect Circuit . . . . . . . . . . . . . . . . . . . 27
4.2.4 Snubber Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.2.5 Deadtime Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2.6 Gate Driver Power Source . . . . . . . . . . . . . . . . . . . . . . 29
4.2.7 Zero Crossing Detection . . . . . . . . . . . . . . . . . . . . . . . 31
4.3 The Structure of Software . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.3.1 Sine Table Establishment . . . . . . . . . . . . . . . . . . . . . . . 33
4.3.2 Program Structure . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.3.3 Controller Block Diagram . . . . . . . . . . . . . . . . . . . . . . 34
4.4 Grid-Tied Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.5 Parallel Operation of Two Inverters . . . . . . . . . . . . . . . . . . . . . . 38
4.6 Grid-Tied Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
V
5 CONCLUSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

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