Bendable Differential Power Processing Converter for Curved Photovoltaic Panels Ibaraki University Keito Aikawa, Hayato Sato, Masatoshi Uno 1/22 ■Propose novel differential power processing converter (DPP) using the flexible transformer ■Eliminated the mismatch issues due to curved photovoltaic panels ■Improved extractable power by 4.7% with proposed DPP converter Highlights
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Bendable Differential Power Processing
Converter for Curved Photovoltaic Panels
Ibaraki University
Keito Aikawa, Hayato Sato, Masatoshi Uno
1/22
■Propose novel differential power processing converter (DPP) using
the flexible transformer
■Eliminated the mismatch issues due to curved photovoltaic panels
■Improved extractable power by 4.7% with proposed DPP converter
Highlights
Background
Characteristics and mismatch issues
of curved photovoltaic panels
Conventional DPP converter
Proposed DPP Converter
Features and operation
Flexible Transformer
Design method and evaluation
Experimental Results
Conclusion
Outline
ICPE 2019 : Keito Aikawa
Flexible panel
Prototype
2/22
Background
3/22
Characteristics and Issues of Curved Photovltaic Panels
Mismatched substring characteristics
due to uneven irradiance
Configuration of PV panels
Bypass diode
Cell Substring
Panel
front rear
① ② ③
①
③
②
• Bendable, lightweight
• Wide range of applications
ICPE 2019 : Keito Aikawa 4/22
Curved solar roofs
(PHEV)Flexible panel
ICPE 2019 : Keito Aikawa 5/22
• Significant power reduction
• Occurrence of multiple maximum power points (MPPs)
Po
wer
Normal
Panel characteristics
I pa
nel
Vpanel
Substring characteristics
Ipanel
Cu
rren
t
Voltage
Normal
Low-irradiance
PV2
PV1
PV3
Substring
Bypass Diode
Low-irradiance
Characteristics and Issues of Curved Photovltaic Panels