http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Shuhuai Shi (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Research on Multiphase Topology of F2F DC Transformer and the Control Method
Shuhuai Shi,Zhuan Zhao,Fang Zhuo,Sheng Cheng,Runchu Ding 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
With the development of HVDC system and medium voltage DC distribution network, DC transformer is needed for voltage level conversion and power transmission. In this paper, a multi-phase face-to-face (F2F) DC transformer topology based on modular multilevel converter (MMC) is proposed to connect two DC systems with different voltage levels and stabilize the lower bus voltage. When the two systems have fixed voltage levels, the topology can increase the transmission power and reduce AC transformer insulation requirements. In this paper, the topology of the proposed DC transformer is introduced, and the control and modulation strategy of the DC transformer are put forward. It can realize large voltage ratio of the system with small ratio AC transformer, and the voltage level conversion of the DC transformer does not depend on the AC transformer. At last, a simulation example is given in MATLAB/Simulink to verify the feasibility of the proposed topology.
-
A DC Transformer Based on MMC and Full-Bridge Structure with Control Method
Sheng Cheng,Shuhuai Shi,Fang Zhuo,Feng Wang,Yanlin Zhu,Nan Zhang 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
With the deterioration of environmental problems and the shortage of fossil energy, DC distribution net with convenient access to distributed energy has a bright prospect. To connect DC buses with different voltage level, DC/DC converter becomes the focus of research. This paper focuses on the modulation strategy of dc-dc converter based on the modular multilevel converter (MMC) and Full-bridge, which is suitable for medium-low voltage and high-power transmission. On this structure, a quasi-square wave modulation strategy with voltage conversion ability is adopted to improve the performance of the dc-dc converter. This modulation strategy can flexibly alter the AC voltage peak value and limit the dv/dt on the edge of square wave. Simulation results in MATLAB/Simulink verified the proposed modulation strategy.
-
Wang, Feng,Zhu, Tianhua,Zhuo, Fang,Yi, Hao,Shi, Shuhuai The Korean Institute of Power Electronics 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.5
The distributed maximum power point tracking (DMPPT) concept is widely adopted in photovoltaic systems to avoid mismatch loss. However, the high cost and complexity of DMPPT hinder its further promotion in practice. Based on the concept of DMPPT, this paper presents an integrated submodule level half-bridge stack structure along with an optimal current point tracking (OCPT) control algorithm. In this full power processing integrated solution, the number of power switches and passive components is greatly reduced. On the other hand, only one current sensor and its related AD unit are needed to perform the ideal maximum power generation for all of the PV submodules in any irradiance case. The proposal can totally eliminate different small-scaled mismatch effects in real-word condition and the true maximum power point of each PV submodule can be achieved. As a result, the ideal maximum power output of the whole PV system can be achieved. Compared with current solutions, the proposal further develops the integration level of submodule DMPPT solutions with a lower cost and a smaller size. Moreover, the individual MPPT tracking for all of the submodules are guaranteed.
-
Feng Wang,Tianhua Zhu,Fang Zhuo,Hao Yi,Shuhuai Shi 전력전자학회 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.5
The distributed maximum power point tracking (DMPPT) concept is widely adopted in photovoltaic systems to avoid mismatch loss. However, the high cost and complexity of DMPPT hinder its further promotion in practice. Based on the concept of DMPPT, this paper presents an integrated submodule level half-bridge stack structure along with an optimal current point tracking (OCPT) control algorithm. In this full power processing integrated solution, the number of power switches and passive components is greatly reduced. On the other hand, only one current sensor and its related AD unit are needed to perform the ideal maximum power generation for all of the PV submodules in any irradiance case. The proposal can totally eliminate different small-scaled mismatch effects in real-word condition and the true maximum power point of each PV submodule can be achieved. As a result, the ideal maximum power output of the whole PV system can be achieved. Compared with current solutions, the proposal further develops the integration level of submodule DMPPT solutions with a lower cost and a smaller size. Moreover, the individual MPPT tracking for all of the submodules are guaranteed.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
