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- 저자 : Xinke Huang (검색결과 2 건)
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Xinke Huang,Huan Wang,Yibo Wang,Honghua Xu 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
DC series-parallel photovoltaic (PV) plants have many advantages. As the most important equipment in the system, DC-Series DC/DC converter has some special technical requirements compared to other applications, especially, the wide input and output voltage regulation range requirement presents a unique challenge to the DC/DC converter design. The paper proposes a Quasi Z-Source based Full Bridge Isolated DC/DC Converter (QZS-FBIC) as a basic module, which cascaded through input parallel and output series (IPOS) to improve power capacity and output voltage adjustment range, so as to meet with the needs of the DC series-parallel PV generation system. The proposed converter can operate both in boost and buck mode. Besides some normal operating modules, several redundant modules are added, and all of these modules putting in and cutting out control to enlarge the range of the output voltage of the converter. A 20kV/500kW DC/DC converter model and 60kV/1.5MW system model are built in Matlab / Simulink to test the proposed topology and control strategies.
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Series-connected PV MVDC Converter for Large Scale PV System
Huan Wang,Xinke Huang,Yibo Wang,Honghua Xu 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper presents a novel series-connected PV MVDC converter for large scale PV plant. By analyzing the characteristic of the series-connection PV system, the topology of MVDC converter based on modular structure of input parallel and output series (IPOS) is presented. A novel reconfigurable topology is proposed for the module of the converter. By regulating of switches duty cycle, the module can be reconfigured to realize step-up or step-down mode. With the control strategy and reconfigurable module topology, the series-connected PV MVDC converter achieves wide input voltage range to adapt PV array characteristic and wide output voltage range to adapt to series-connection system requirement with a high efficiency. 5kV/80kW dc-dc module is developed. Series-connected PV converter with modules in IPOS connection is built in simulation environment. The simulation result and experiment result are presented in the paper.
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