Parallel Control Method Based on the Consensus Algorithm for the Non-Isolated AC/DC Charging Module

Yixin Zhu, Tao Wang, Liansong Xiong, Gaofeng Zhang and Xin Qian
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Yixin Zhu: School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China
Tao Wang: School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China
Liansong Xiong: School of Automation, Nanjing Institute of Technology, Nanjing 211167, China
Gaofeng Zhang: School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China
Xin Qian: School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China

Energies, 2018, vol. 11, issue 10, 1-13

Abstract: A high-power charging station for electric vehicles usually adopts a parallel structure of multiple power modules. However, due to the parameter differences among power modules, a parallel system always has circulating current issues. This paper takes a non-isolated AC/DC charging module as the research object and proposes a current sharing control strategy for multiple power modules based on the consensus algorithm. By constructing a sparse communication network with the CAN (Controller Area Network) protocol and exchanging current information, accurate current sharing among power modules is realized. Firstly, the zero-sequence circulating current issue is analyzed through a parallel model of the three-phase rectifier, with an improved circulating current restraint strategy proposed based on the zero-sequence voltage compensation. Then, the principle of the consensus algorithm is explained, which is applied to the current sharing control of multiple power modules. Finally, the proposal is tested by the designed simulation and experimental cases. From the obtained results, it can be seen that the proposed control strategy can effectively realize accurate current sharing among multiple power modules and well restrain the zero-sequence circulating current at the input side.

Keywords: three phase rectifier; parallel connection; zero sequence current; current sharing; consistency algorithm (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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