역방향 매트릭스 컨버터 운전의 신뢰성 및 안정성 향상 기법
- 주제(키워드) 역방향 매트릭스 컨버터 , 신뢰성 , 안정성
- 발행기관 아주대학교
- 지도교수 이교범
- 발행년도 2019
- 학위수여년월 2019. 2
- 학위명 석사
- 학과 및 전공 일반대학원 전자공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000028363
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
This paper proposes highly reliability and stability operation of reverse matrix converter (RMC). The RMC is an AC/AC power converter operating in boost mode which is suitable for using in power generation system. In order to enhance the reliability and stability of this system, this paper approaches in two aspects, power quality improvement and switch fault detection. Due to absence of DC-link capacitor, an output power quality of the RMC deteriorates in case unbalance and harmonic problems occur in the input source. In this paper, two current control strategies are presented for dealing with these problems. Furthermore, a short fault detection strategy, which is intended for outer switches of current source inverter (CSI) in the RMC, is suggested. Since the switch fault causes current distortions transmitted to loads, it is directly related to the stability of the RMC system. The proposed fault detection strategy easily detects faulty switches by using current vector angle without additional components. The effectiveness of the proposed strategies is conducted simulation and experiment results.
more목차
CHAPTER I. INTRODUCTION 1
CHAPTER II. REVERSE MATRIX CONVERTER 4
2.1 Circuit Configuration 4
2.2 Modulation of the CSI 5
2.3 Modulation of the VSR 8
CHAPTER III. CONTROL STRATEGY FOR IMPROVING POWER QUALITY IN THE RMC 11
3.1 Control Strategy for Reduction of Current Distortions under Unbalanced Input Voltages 11
3.2 Control Strategy for Harmonics Reduction 17
CHAPTER IV. SHORT FAULT DETECTION STRATEGY FOR OUTER SWITCHES OF THE CSI 18
4.1 Short Fault Analysis 18
4.2 Short Fault Detection Strategy 19
CHAPTER V. SIMULATION 21
5.1 Control Strategy for Reduction of Current Distortions under Unbalanced Input Voltages 21
5.2 Control Strategy for Harmonics Reduction 23
5.3 Short Fault Detection Strategy for Outer Switches of the CSI 26
CHAPTER VI. DEVELOPMENT OF EXPERIMENT SET 28
CHAPTER VII. EXPERIMENTAL RESULTS 31
7.1 Control Strategy for Reduction of Current Distortions under Unbalanced Input Voltages 32
7.2 Control Strategy for Reduction of Harmonics 35
CHAPTER VIII. CONCLUSIONS 38
REFERENCES 39
