Current Sharing/Voltage Sharing Control Strategy for Cascaded DC/DC Converter in Photovoltaic DC Collection System

2018 ◽  
Author(s):  
Bo Chen ◽  
Yi Wang ◽  
Yanjun Tian ◽  
Shilei Wei
Keyword(s):  
Control Strategy ◽  
Collection System ◽  
Current Sharing

scholarly journals Coordinated Control Strategy of a Combined Converter in a Photovoltaic DC Boost Collection System under Partial Shading Conditions

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 474
Author(s):  
Ke Guo ◽  
Qiang Liu ◽  
Xinze Xi ◽  
Mingxuan Mao ◽  
Yihao Wan ◽  
...  
Keyword(s):  
Control Strategy ◽  
Coordinated Control ◽  
Collection System ◽  
Partial Shading ◽  
Voltage Range ◽  
Current Sharing ◽  
Unbalanced Voltage ◽  
Cascade Structure ◽  
Converter Unit ◽  
Abnormal Operation

Series–parallel module technology can meet a DC converter’s requirements of high-power, large-capacity, and high step-up ratio in photovoltaic a DC boost collection system. However, the cascaded structure has the problem of voltage and current sharing between modules, and due to the duty cycle limitation of converters, the combined converters in the PV-converter unit have an unbalanced voltage, which may also exceed the voltage range under partial shading conditions (PSCs). First, aiming at the problems of voltage sharing, current sharing, and low modularity in the combined converter, this paper proposes a distributed control strategy. Then, by adopting a coordinated control strategy based on the sub-module cutting in and out, the problem that the combined converter cannot normally boost under PSCs was solved. The paper not only takes the advantages of the cascade structure of the combined converter to increase the power and voltage, but also improves its modularity to solve the problem of abnormal operation under uneven irradiation. This dramatically improves the adaptability of combined converters in a photovoltaic DC collection system. Finally, a small power experiment was carried out, where the experimental results verified the effectiveness of the control strategy.

Current sharing control strategy in CRM mode for multi-module parallel Boost converter

2021 ◽  
Author(s):  
Shengwei Gao ◽  
Hao Wang ◽  
Yifeng Wang ◽  
Zhongjie Wang ◽  
Bo Chen
Keyword(s):  
Control Strategy ◽  
Boost Converter ◽  
Current Sharing ◽  
Current Sharing Control

Modeling and Design of an Oscillatory Current-Sharing Control Strategy in DC Microgrids

2015 ◽  
Vol 62 (11) ◽  
pp. 6647-6657 ◽  
Author(s):  
Mohsen Hamzeh ◽  
Amin Ghazanfari ◽  
Yasser Abdel-Rady I. Mohamed ◽  
Yaser Karimi
Keyword(s):  
Control Strategy ◽  
Dc Microgrids ◽  
Current Sharing ◽  
Current Sharing Control ◽  
Oscillatory Current

scholarly journals Current Sharing Control Strategy for IGBTs Connected in Parallel

2016 ◽  
Vol 16 (2) ◽  
pp. 769-777 ◽  
Author(s):  
Raul Perez-Delgado ◽  
Guillermo Velasco-Quesada ◽  
Manuel Roman-Lumbreras
Keyword(s):  
Control Strategy ◽  
Current Sharing ◽  
Current Sharing Control
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