An Adaptive Backstepping Sliding Mode Cascade-Control Method for a DC Microgrid Based on Nonlinear Virtual Inertia

In order to improve the bus voltage robustness of distributed multi-source DC microgrid, a new cascade control method based on nonlinear virtual inertia and adaptive backstepping sliding mode is proposed. Firstly, the mathematical model of distributed multi-source DC microgrid with a buck–boost inte...

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Bibliographic Details
Published in:Electronics (Basel) 2021-12, Vol.10 (24), p.3100
Main Authors: Mao, Jingfeng, Zhang, Xiaotong, Dai, Tengfei, Wu, Aihua, Yin, Chunyun
Format: Article
Language:English
Subjects:
Adaptive algorithms
Adaptive control
Cascade control
Coefficient of variation
Control methods
Control systems design
Control theory
Converters
Distributed generation
Electric potential
Inertia
Mathematical analysis
Mathematical models
Neural networks
Nonlinear control
Robustness (mathematics)
Sliding mode control
Voltage
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Summary:In order to improve the bus voltage robustness of distributed multi-source DC microgrid, a new cascade control method based on nonlinear virtual inertia and adaptive backstepping sliding mode is proposed. Firstly, the mathematical model of distributed multi-source DC microgrid with a buck–boost interface converter is analyzed and established. A nonlinear virtual inertia control method based on a variable droop coefficient is given by introducing the converter output voltage variation rate feedback term and a saturation function equation. Secondly, the voltage and current double closed-loop cascade controller is designed by using backstepping sliding mode control and adaptive algorithms. Finally, the system and cascade control models are built in MATLAB/Simulink for multi-case simulation. The feasibility and effectiveness of the proposed method is verified by comparing the results with traditional control methods.
ISSN:2079-9292
2079-9292
DOI:10.3390/electronics10243100