Segmented Differential Power Processing Converter Unit and Control Algorithm for Photovoltaic Systems

Differential power processing (DPP) for photovoltaic (PV) systems can achieve high system efficiency and maintain maximum power production even under mismatched conditions. However, DPP converters applied to large-scale systems have challenges of complicated installation and high voltage ratings. Th...

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Published inIEEE transactions on power electronics Vol. 36; no. 7; pp. 7797 - 7809
Main Authors Jeong, Hoejeong, Park, Seungbin, Jung, Jee-Hoon, Kim, Taewon, Kim, A-Rong, Kim, Katherine A.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Algorithms
Bidirectional flyback converter
Buildings
Connectors
Control algorithms
Control theory
Converters
dc–dc converter
differential power processing (DPP)
Electric power generation
Energy conversion efficiency
Experimentation
High-voltage techniques
Lighting
maximum power point tracking (MPPT)
Maximum power tracking
Modular structures
partial power processing
photovoltaic (PV) systems
Photovoltaic cells
Process control
Tracking control
Voltage control
Online AccessGet full text
ISSN0885-8993
1941-0107
DOI10.1109/TPEL.2020.3044417

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Abstract Differential power processing (DPP) for photovoltaic (PV) systems can achieve high system efficiency and maintain maximum power production even under mismatched conditions. However, DPP converters applied to large-scale systems have challenges of complicated installation and high voltage ratings. The segmented DPP structure is introduced as a modular approach that utilizes groups of bidirectional DPP flyback converters to maximize PV power generation while minimizing converter power loss. Groups of four DPP converters are combined into a segmented DPP unit with maximum power point tracking (MPPT) control to maximize output power of the unit. The segmented DPP system and control algorithm are verified through simulation and hardware experimentation. Simulation results verify the effectiveness of the control algorithm with multiple segmented DPP units interacting with a typical inverter employing MPPT. Experimental results verify that system efficiency of the segmented DPP unit reaches 96.4% in even lighting conditions, reaches 92.7% in severe partial shading conditions, and shows an increase of up to 14.8% in uneven lighting conditions compared to an equivalent series-connected PV system.
AbstractList Differential power processing (DPP) for photovoltaic (PV) systems can achieve high system efficiency and maintain maximum power production even under mismatched conditions. However, DPP converters applied to large-scale systems have challenges of complicated installation and high voltage ratings. The segmented DPP structure is introduced as a modular approach that utilizes groups of bidirectional DPP flyback converters to maximize PV power generation while minimizing converter power loss. Groups of four DPP converters are combined into a segmented DPP unit with maximum power point tracking (MPPT) control to maximize output power of the unit. The segmented DPP system and control algorithm are verified through simulation and hardware experimentation. Simulation results verify the effectiveness of the control algorithm with multiple segmented DPP units interacting with a typical inverter employing MPPT. Experimental results verify that system efficiency of the segmented DPP unit reaches 96.4% in even lighting conditions, reaches 92.7% in severe partial shading conditions, and shows an increase of up to 14.8% in uneven lighting conditions compared to an equivalent series-connected PV system.
Author Park, Seungbin
Jeong, Hoejeong
Kim, Taewon
Kim, Katherine A.
Jung, Jee-Hoon
Kim, A-Rong
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SubjectTerms Algorithms
Bidirectional flyback converter
Buildings
Connectors
Control algorithms
Control theory
Converters
dc–dc converter
differential power processing (DPP)
Electric power generation
Energy conversion efficiency
Experimentation
High-voltage techniques
Lighting
maximum power point tracking (MPPT)
Maximum power tracking
Modular structures
partial power processing
photovoltaic (PV) systems
Photovoltaic cells
Process control
Tracking control
Voltage control
Title Segmented Differential Power Processing Converter Unit and Control Algorithm for Photovoltaic Systems
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