Automatic-Optimization ADRC-Based Disturbance Rejection Method for Low Voltage Interface Converter in Microgrid

Long, Taotao; Wang, Ping; Wang, Yifeng; Ma, Xiaoyong; Shi, Huaidong; Yang, Shaoqi

doi:10.1109/ecce50734.2022.9947655

Cited by 2 publications

(1 citation statement)

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“…Depending on the electrical system, ship microgrids can be classified into AC and DC. In comparison to AC microgrids, DC microgrids exhibit prominent advantages, such as high efficiency, a low cost, and high reliability [3][4][5]. However, with the penetration of electronic devices and the negative impedance characteristics of constant power loads, ship DC microgrid systems are becoming less stable [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Control Optimization Method for Ship Direct Current Microgrid Based on Impedance Reshaping

Liao,

Dong,

Yang

et al. 2024

JMSE

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In response to the constant power negative impedance characteristics on the load side of a ship DC microgrid, leading to voltage oscillation issues in the DC bus, this paper proposes a control optimization method based on impedance reshaping using bus voltage feedback. First, a simplified small-signal diagram of a lithium battery energy storage system converter is analyzed. Combining active damping control technology, an impedance regulator is introduced, and its parameters are optimized to effectively reduce the output impedance magnitude on the power source side. Subsequently, a ship DC microgrid simulation model is constructed using MATLAB R2022a/Simulink for validation, and comparative analysis is conducted on the anti-interference ability of the DC bus voltage before and after impedance reshaping. Finally, a model is built on a semi-physical simulation platform to experimentally verify the proposed method. The research results indicate that the proposed control optimization method can effectively increase the system’s stability margin, suppress DC bus oscillations, and enhance the anti-interference ability of the ship DC microgrid’s bus voltage when facing significant power load variations.

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Section: Introductionmentioning

confidence: 99%

Control Optimization Method for Ship Direct Current Microgrid Based on Impedance Reshaping

Liao,

Dong,

Yang

et al. 2024

JMSE

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Active Disturbance Rejection Control Combined with Improved Model Predictive Control for Large-Capacity Hybrid Energy Storage Systems in DC Microgrids

Liu,

Chen,

Suo

et al. 2024

Applied Sciences

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In DC microgrids, a large-capacity hybrid energy storage system (HESS) is introduced to eliminate variable fluctuations of distributed source powers and load powers. Aiming at improving disturbance immunity and decreasing adjustment time, this paper proposes active disturbance rejection control (ADRC) combined with improved MPC for n + 1 parallel converters of large-capacity hybrid energy storage systems. ADRC is utilized in outer voltage control loops, and improved MPC is employed in inner current control loops of n battery converters. Droop control is adopted to obtain power distribution between n battery converters, and a DC bus voltage compensator is used to compensate voltage deviations and maintain constant DC bus voltage. The low-pass filter (LPF) is adopted to obtain high-frequency power as the reference for the supercapacitor converter, ADRC is also utilized in the outer power control loop, and MPC is employed in the inner current control loop. Compared with traditional observers, the voltage expansion state observer of the proposed ADRC control is independent of the system model and parameters and consequently has strong disturbance immunity, and significantly reduces voltage overshoots during power fluctuations. The MPC-based inner current control loops of n + 1 converters accelerate current response speed and significantly decrease switching losses. Simulation and experimental results indicate that utilizing the proposed control strategies, large-capacity HESS has stronger anti-interference ability, shorter regulation time, smaller switching loss, and simultaneously maintains the stability of the DC bus voltage.

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Automatic-Optimization ADRC-Based Disturbance Rejection Method for Low Voltage Interface Converter in Microgrid

Cited by 2 publications

References 0 publications

Control Optimization Method for Ship Direct Current Microgrid Based on Impedance Reshaping

Control Optimization Method for Ship Direct Current Microgrid Based on Impedance Reshaping

Active Disturbance Rejection Control Combined with Improved Model Predictive Control for Large-Capacity Hybrid Energy Storage Systems in DC Microgrids

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