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| Content Provider | IET Digital Library |
|---|---|
| Author | Li, Xiuyi Zhu, Miao He, Guoqing Cai, Xu |
| Abstract | In this study, a novel structure of DC power collection system for photovoltaic (PV) station with consideration of impedance network concepts has been proposed to cope with technical challenges in large-scale DC PV Station. An impedance-source multi-module cascaded DC–DC step-up converter serves as a key device for the proposed collection grid, which has an integrated function of multi-maximum power point tracking (MPPT) control and high-gain DC voltage step-up conversion. The low-voltage DC bus and distributed MPPT devices can be omitted to make the system simple and reliable. The system structure is beneficial to realise internal fault isolation and unitary dynamic control at station level. The introduction of impedance network makes it possible to adjust the voltage gain flexibly as well as resist shoot-through of bridge arms, which can improve the operational adaptability against input power mismatch and reliability of the DC power collection grid for PV station. A detailed introduction to system architecture, key DC step-up converter, working principle and control/modulation strategy has been given in this study. All theoretical results have been validated by system simulation under balanced and mismatched power inputs. The proposed DC power collection grid for PV station has a potential application value in the future construction of large-scale DC PV stations. |
| Starting Page | 1734 |
| Ending Page | 1739 |
| Page Count | 6 |
| Volume Number | 2017 |
| e-ISSN | 20513305 |
| Issue Number | Issue 13, Jan (2017) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2017/13 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2017.0629 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2017-01-01 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) |
| Subject Keyword | Application Value Balanced Power Input Bridge Arms Control of Electric Power System DC Power Collection System Distributed MPPT Device High-gain DC Voltage Step-up Conversion Impedance Network Impedance Network Concepts Impedance-source Multimodule DC-DC Step-up Converter Integrated Function Internal Fault Isolation Large-scale PV Station Low-voltage DC Bus Maximum Power Point Trackers Mismatched Power Input Modulation Strategy Multimaximum Power Point Tracking Control Operational Adaptability Photovoltaic Power System Photovoltaic Station Power Collection Grid Power Generation Control Power Grid Solar Power Stations Station Level System Architecture Unitary Dynamic Control Voltage Gain Working Principle |
| Content Type | Text |
| Resource Type | Article |
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