An improved distributed collaborative control strategy for shipboard hybrid energy storage system

ZHANG Yu; ZHUANG Xu-zhou; ZENG Yu-ji; ZHANG Qing-jin; HU Zhi-yong

doi:10.16411/j.cnki.issn1006-7736.2023.01.010

Journal of Dalian Maritime University >

2023 , Vol. 49 >Issue 1: 93 - 102

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2023.01.010

An improved distributed collaborative control strategy for shipboard hybrid energy storage system

ZHANG Yu ,
ZHUANG Xu-zhou ,
ZENG Yu-ji ,
ZHANG Qing-jin ,
HU Zhi-yong

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(a.College of Marine Electrical Engineering;b. Marine Engineering College, Dalian Maritime University, Dalian 116026, China)

Received date: 2022-10-21

Revised date: 2022-11-25

Online published: 2022-11-25

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Abstract

In order to improve the power quality and stability of the dual-electric marine DC propulsion system, an improved distributed collaborative control strategy of the ship-borne hybrid energy storage system composed of supercapacitors and batteries was designed. The battery and supercapacitor were controlled with proportional sag and integral sag respectively to achieve high and low frequency power distribution. Each battery was equipped with a local distributed compensator to enable autonomous power distribution and state-of-charge (SoC) balancing between multiple parallel batteries. At the same time, the DC bus voltage was used to adjust the voltage secondarily to realize the autonomous recovery of the DC bus voltage, and combined with the integrated droop control to achieve fast SoC recovery of the supercapacitor. Finally, a general mathematical model of the shipboard hybrid energy storage system was established, and the dynamic analysis was carried out by using the proposed model, which theoretically verified the effectiveness of the system’s battery SoC dynamic equalization, supercapacitor SoC fast recovery, autonomous power distribution and DC bus voltage autonomous recovery. The results of hardware-in-the-loop experiments are consistent with the theoretical analysis, which effectively proves the multi-function characteristics of the system.

Key words： shipboard hybrid energy storage system; battery SoC equalization; supercapacitor SoC fast recovery; autonomous power allocation; bus voltage autonomous recovery

Cite this article

ZHANG Yu , ZHUANG Xu-zhou , ZENG Yu-ji , ZHANG Qing-jin , HU Zhi-yong . An improved distributed collaborative control strategy for shipboard hybrid energy storage system[J]. Journal of Dalian Maritime University, 2023 , 49(1) : 93 -102 . DOI: 10.16411/j.cnki.issn1006-7736.2023.01.010

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