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- Title
Development of DMPPT experimental platform for photovoltaic based on multi-port DC converters.
- Authors
JIANG Jiahui; ZHANG Tao; ZHANG Chuanyu; WANG Zhenkun; WANG Chunfang
- Abstract
Photovoltaic power generation has received widespread attention for its cleanliness and efficiency. However, due to many reasons like uneven aging and partial shading, power mismatch can easily occur while photovoltaic submodules in series working, resulting in "hot spot" and reducing the utilization rate and service life of photovoltaic cells. In order to deepen students' understanding of photovoltaic cell models and the characteristic caused by series mismatch, as well as how to solve this problem, this paper developed a distributed maximum power point tracking (DMPPT) experimental platform based on a multi-port DC converter for photovoltaic cells. Firstly, the series mismatch characteristics of photovoltaic cells is modeled and analyzed. Then, the voltage equalization strategy of multi-port DC converter for photovoltaic cells was analyzed and studied. Finally, a 36 V/200 W DMPPT experimental platform based on a multi-port Buck-Boost DC converter was developed, and the steady-state waveform of the system was obtained and compared with the method of using bypass diodes. Through this experimental platform and this experimental case, students can have a more in-depth understanding of the PV cell model and its mismatch features, as well as how to use multi-port converters to realize DMPPT of PV cells, master the modeling method of PV cells, and cultivate the practical ability of discovering problems, solving problems, and verifying through simulation.
- Subjects
PHOTOVOLTAIC cells; SOLAR cells; PHOTOVOLTAIC power generation; PHOTOVOLTAIC power systems; SERVICE life
- Publication
Experimental Technology & Management, 2023, Vol 40, Issue 12, p66
- ISSN
1002-4956
- Publication type
Article
- DOI
10.16791/j.cnki.sjg.2023.12.010