Hierarchical cooperative stabilization control for shipboard distributed power battery systems

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Journal of Dalian Maritime University ›› 2025, Vol. 51 ›› Issue (4) : 43-57.

ZENG Yuji¹，ZHANG Qinjin^*1，YU Heyang²

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Abstract

To address the problem of unbalanced power allocation and unstable bus voltage in shipboard distributed power battery system under weak grid support conditions, a hierarchical cooperative stabilization control method is proposed. This method is based on the layered control idea, which divides the controller of the power battery converter into the main control layer, observation layer and cooperative control layer. In the main control layer, the droop control link is removed, and a droop-free control framework based on a distributed communication mechanism is constructed to solve the inherent contradiction between power equalization and voltage regulation in traditional droop control. In the observation layer, a dynamic diffusion algorithm is utilized to iteratively calculate the average state variables at local power battery converters, which drives the distributed averaging calculation process to converge smoothly and solves the communication data congestion problem between neighboring power battery converters. In the cooperative control layer, a multi-objective cooperative stabilization controller is designed to achieve composite dynamic equalization of State-of-Charge and State-of-Health, load power allocation by capacitance, and stable regulation of average bus voltage. The experimental results show that the proposed method can extend the service life of distributed power battery system by 20%, and the average bus voltage transient deviation is controlled within 0.6%. This method can provide a reference to the application of the operation control for the power battery system in new energy ships.

Key words

shipboard distributed power battery system / hierarchical cooperative stabilization control / droop-free control

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ZENG Yuji, ZHANG Qinjin, YU Heyang. Hierarchical cooperative stabilization control for shipboard distributed power battery systems[J]. Journal of Dalian Maritime University. 2025, 51(4): 43-57

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