Article, 2024

Multi-objective cooperative controller design for rapid state-of-charge balancing and flexible bus voltage regulation in shipboard DC microgrids

ISA Transactions, ISSN 1879-2022, 0019-0578, Volume 146, Pages 421-436, 10.1016/j.isatra.2023.12.043

Contributors

Liu, Yancheng [1] Zeng, Yuji 0000-0002-4916-9216 (Corresponding author) [1] Zhang, Qinjin 0000-0003-4350-1748 [1] You, Shi 0000-0003-3371-9647 [2] Guo, Haohao 0000-0003-4291-6722 [1] Hu, Yuanting [3] Zhang, Fengkui [1]

Affiliations

  1. [1] Dalian Maritime University
    2. [NORA names: China; Asia, East];
  2. [2] Technical University of Denmark
    3. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  3. [3] State Grid Corporation of China (China)
    4. [NORA names: China; Asia, East]

Abstract

In this paper, a multi-objective cooperative (MOC) controller based on average consensus algorithm is designed to achieve rapid State-of-Charge (SoC) balancing, proportional load current sharing, and flexible DC bus voltage regulation for parallel battery storage units (BSUs) in shipboard DC microgrids. Different from the conventional secondary controllers, the designed MOC controller can simultaneously achieve the above three control objectives with a fully distributed manner without requiring multiple controllers, thereby effectively improving the system stability and reducing the communication burden. Furthermore, an optimized convergence factor is designed to accelerate SoC balancing, and pinning control is introduced to obtain flexible and accurate DC bus voltage regulation. The process of SoC balancing and current sharing analysis, SoC convergence performance analysis, large-signal stability analysis, and global steady-state analysis verifies the rationality and stability of the MOC controller. Finally, the Matlab/Simulink simulation and StarSim HIL experimental results demonstrate the effectiveness and robustness of the designed MOC controller in a shipboard DC microgrid under various testing scenarios.

Keywords

DC bus voltage regulation, DC microgrid, HIL experimental results, MATLAB/Simulink, MOC, Matlab/Simulink simulation, SoC, SoC balancing, StarSim, algorithm, analysis, average consensus algorithm, balance, battery storage units, burden, bus voltage regulation, communication, communication burden, consensus algorithm, control, control design, control objectives, conventional secondary control, convergence, convergence factor, convergence performance analysis, cooperative control design, current sharing, design, distributed manner, effect, experimental results, factors, large-signal stability analysis, load current sharing, manner, microgrid, multi-objective, multiple controllers, objective, performance analysis, pin, pinning control, process, proportional load current sharing, rationality, regulation, results, robustness, scenarios, secondary control, sharing, simulation, stability, stability analysis, state of charge, state-of-charge balancing, steady-state analysis, storage unit, system, system stability, test, test scenarios, units, voltage regulation

Funders

  • National Natural Science Foundation of China
  • China Postdoctoral Science Foundation

Data Provider: Digital Science

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