서지주요정보
New gate control technique for ripple reduction in renewable energy DC-DC converter = 신·재생 에너지용 DC-DC 컨버터의 입·출력 리플 저감을 위한 새로운 게이트 제어 기법
서명 / 저자 New gate control technique for ripple reduction in renewable energy DC-DC converter = 신·재생 에너지용 DC-DC 컨버터의 입·출력 리플 저감을 위한 새로운 게이트 제어 기법 / Jongyoon Chae.
발행사항 [대전 : 한국과학기술원, 2023].
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8040583

소장위치/청구기호

학술문화관(문화관)B1층 보존서고

MPD 23007

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Recently, as global warming and environmental issues have emerged, interest in renewable energy sources such as fuel cells and photovoltaics has increased. In the case of renewable energy, a DC-DC converter is required when connected to the system due to intermittent power generation. Recently, various studies have been aimed at improving the performance of DC-DC converters interconnected to renewable energy. However, in previous studies, the effect of dead time on the performance or operation of the power converter was neglected. In DC-DC converters, dead time is essential to prevent shoot-through, but due to the effect of this dead time, the converter's performance or operation might be degraded. For example, input current ripple increases in a DC-DC converter for a fuel cell system, and output voltages are unbalanced in a voltage balancer-integrated DC-DC converter for photovoltaics. In this study, the dead time effect on DC-DC converters interconnected to renewable energy is analyzed, and a new gate control technique is proposed to mitigate the dead time effect.

최근 지구온난화와 환경 문제가 대두됨에 따라 연료전지, 태양광 등 신·재생에너지에 대한 관심이 증가하고 있습니다. 신·재생에너지의 경우, 간헐적인 발전 특성으로 인해 시스템에 연계될 때 DC-DC 컨버터가 요구되게 됩니다. 최근 다양한 연구들이 신·재생에너지에 연계되는 DC-DC 컨버터의 성능 향상을 도모해왔습니다. 하지만 기존 연구의 경우, 파워 컨버터의 데드타임 영향에 대해 간과하였습니다. DC-DC 컨버터에서 데드타임은 Shoot-through 현상을 방지하기 위해 필수적이지만, 이 데드타임 구간의 영향으로, 연료전지용 DC-DC 컨버터에서 입력 전류 리플 증가, 태양광용 전압 밸런서 DC-DC 컨버터에서의 출력 전압 불균형 등 컨버터의 성능이 저하될 수 있습니다. 따라서 본 연구에서는 신·재생에너지 연계형 DC-DC 컨버터에서, 데드타임이 어떠한 영향을 미치는지 원인을 분석하고, 이를 해결하기 위한 게이트 제어 기법에 대해 제안합니다.

서지기타정보

서지기타정보
청구기호 {MPD 23007
형태사항 iii, 35 p. : 삽도 ; 30 cm
언어 영어
일반주기 저자명의 한글표기 : 채종윤
지도교수의 영문표기 : Gun-Woo Moon
지도교수의 한글표기 : 문건우
Including appendix
학위논문 학위논문(석사) - 한국과학기술원 : 미래자동차학제전공,
서지주기 References : p. 28
주제 Dead time
Input current ripple
Unbalanced output voltages
Gate control method
Renewable Energy
데드타임
입력 전류 리플
출력 전압 불균형
게이트 제어기법
신·재생 에너지
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이 주제의 인기대출도서

Various applications in which renewable energy sources are used. (a) DC microgrid. (b) Fuel cell electric vehicle: Hyundai motors XCIENT.

Interleaved boost converter and key waveforms. (a) Interleaved boost converter. (b) Key waveforms ofinterleaved boost converter.

Explanation ofdead timein powerconverter: Operation mode ofboostconverter, (a) Build-up period. (b) Powering period. (c) Shoot-through. (d) Dead time.

IBI-LLC converterin [7] andkey waveforms. (a) IBI-LLC converter in [7]. (b) Key waveforms. (c) Duty ratio VS input current ripple.

IBI-LLC converterin [8] andkey waveforms. (a) IBI-LLC converter in [8]. (b) Key waveforms. (c) Duty ratio VS input current ripple.

Explanation of dead time effecton input current ripple: Key waveforms during dead time.

Conventional gate control method and proposed gate control method. (a) Conventional control method. (b) Proposed control method.

SR turn-on voltage comparison (ta ~tb). (a) Conventional control method. (b) Proposed control method

SR turn-on voltage comparison (th ~t). (a) Conventional control method. (b) Proposed control method.

EXPERIMENT SPECIFICATION

PARAMETER DESIGN FOR PROTOTYPE

Experimental results at Vin = 45V,P.= 600 W. (a) Conventional control method. (b) Proposed control method.

Experimental results atVin =35V,P.= 200 W. (a) Conventional control method. (b) Proposed control method.

Inputcurrentripple and efficiency comparison under entire load condition. (a) Input current ripple comparison. (b) Efficiency comparison.

Voltage balancer architecture. (a) Centralized architecture. (b) Decentralized architecture. (c) Integrated architecture,

IPOS boost converter.

Key waveforms ofIPOS boost converter with conventional gate control method. (a) Balanced load condition. (b) Unbalanced load condition.

Dead time effects on output voltage unbalance.

Key waveforms ofIPOS boost converter in [14]. (a) Balanced load condition. (b) Unbalanced load condition.

Conventional and proposed gate control method. (a) Conventional gate control method. (b) Proposed gate control method.

EXPERIMENT SPECIFICATION

PARAMETER DESIGN FOR PROTOTYPES

Experimental results atPo1 =Poz=0W. (a) Conventional IPOS boost converter andproposedcontrol method. (b) IPOS boost converterin [14].

Experimental results atPo1 =Pqz550W. (a) Conventional IPOS boostconverter andproposed control method. (b) IPOS boostconverterin [14].

Experimental results atPo1 =0W, Poz=500W. (a) Conventional IPOS boostconverter. (b) IPOS boostconverterin [14]. (c) Proposed control method.

Experimental results atPo1 =0W Po2=1kW. (a) Conventional IPOS boostconverter. (b) IPOS boostconverterin [14]. (c) Proposed control method.

Loss breakdown and measured efficiency. (a) Loss breakdown (0:0 condition). (b) Loss breakdown (100:100 condition). (c) Efficiency comparison.