Coordinated Control of Multi-Port Power Router Based on DC Bus Voltage Droop Regulation

Caihong Zhao (), Guanglin Sha, Haoqing Wang, Pingkang Zheng, Ning Liu and Qing Duan
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Caihong Zhao: China Electric Power Research Institute Co., Ltd., Beijing 100080, China
Guanglin Sha: China Electric Power Research Institute Co., Ltd., Beijing 100080, China
Haoqing Wang: China Electric Power Research Institute Co., Ltd., Beijing 100080, China
Pingkang Zheng: School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Ning Liu: China Electric Power Research Institute Co., Ltd., Beijing 100080, China
Qing Duan: China Electric Power Research Institute Co., Ltd., Beijing 100080, China

Energies, 2025, vol. 18, issue 5, 1-21

Abstract: Coordinated operation among various converters within a power router (PR) is crucial for ensuring its normal operation. Since the power balance among converters in a DC PR is reflected by the DC bus voltage level, maintaining stable DC bus voltage control is particularly important as it directly affects the coordinated operation of each converter. This study proposes a coordinated control strategy for multi-port power routers based on DC bus voltage droop regulation, addressing the limitations of existing methods that rely on communication and complex control units. Based on DC bus voltage signals, all power ports automatically switch their operating states, ensuring that only one converter operates in voltage source mode at any given time, thereby maintaining the system’s bus voltage and power balance. This enables effective coordination among converters and ensures stable system operation without requiring communication between converters, simplifying control while maintaining internal system stability.

Keywords: power router; DC bus voltage; coordinated control; smooth switching (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: 2025
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