A Novel Coordination Control Strategy for Parallel-Connected Boost Converters in DC Microgrid

被引：0

作者：

Sun, X. ^{[1
]}

Zhang, L. ^{[1
]}

Wang, D. ^{[1
]}

Lin, J. ^{[1
]}

Wen, C. ^{[2
]}

机构：

[1] State Grid Zhejiang Electric Power Company Limited Deqing County Power Supply Company, Zhejiang

[2] Guodian Nanrui Nanjing Control System Ltd, Nanjing

来源：

International Journal of Engineering, Transactions A: Basics | 2025年 / 38卷 / 04期

关键词：

DC Microgrid; Hybrid Coordination Control Strategy; Parallel-connected Boost Converters; Passivity-based Control; Secondary Control;

D O I：

10.5829/ije.2025.38.04a.01

中图分类号：

学科分类号：

摘要：

Since the constant power loads (CPLs) have negative-impedance characteristics, the system damping of DC microgrid is reduced, which will lead to the collapse of bus voltage. In addition, the errors of current sharing within parallel-connected DC-DC converters amplify due to different line impedances. To address these issues, a hybrid coordination control strategy is proposed for parallel-connected boost converters, which realizes the stable control and maintains the accuracy of current distribution. Firstly, a passivity-based control (PBC) with a proportional-integral (PI) regulator is developed for the boost converter with CPL. The virtual damping based PBC enhances the system damping and PI regulator eliminates the steady-state error caused by the variation of load. On this basis, a secondary voltage control (SVC) featuring in simplicity and weak dependence on communication is introduced to remove the errors of current distribution. Finally, a RT-LAB-based hardware in the loop (HIL) experimental platform is established and the experimental results verify the effectiveness of the proposed hybrid coordination control strategy. ©2025 The author(s).

引用

页码：680 / 689

页数：9

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