Second-Order Linear Active Disturbance Rejection Control and Stability Analysis of Energy Storage Grid-Connected Inverter

Youjie Ma; Luyong Yang; Xuesong Zhou; Xia Yang

doi:10.1109/ACCESS.2020.3021083

IEEE Access (Jan 2020)

Second-Order Linear Active Disturbance Rejection Control and Stability Analysis of Energy Storage Grid-Connected Inverter

Youjie Ma,
Luyong Yang,
Xuesong Zhou,
Xia Yang

Affiliations

Youjie Ma: Tianjin Key Laboratory for Control Theory and Applications in Complicated Industry Systems, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin, China
Luyong Yang: ORCiD; Tianjin Key Laboratory for Control Theory and Applications in Complicated Industry Systems, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin, China
Xuesong Zhou: Tianjin Key Laboratory for Control Theory and Applications in Complicated Industry Systems, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin, China
Xia Yang: ORCiD; Tianjin Key Laboratory for Control Theory and Applications in Complicated Industry Systems, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin, China

DOI: https://doi.org/10.1109/ACCESS.2020.3021083
Journal volume & issue: Vol. 8
pp. 160738 – 160748

Abstract

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At present, which has gradually become a technical development trend that the energy storage grid-connected inverter system is connected to the grid to ensure the stable operation of the whole system. However, the stability of the energy storage system itself is also very important for the safe operation of the power grid. Therefore, improving the stability of grid-connected energy storage system is still the key technology of current research. Aiming at the strong coupling and low-voltage ride-through fault of grid-connected system, a second-order mathematical model of grid-connected control system is established. Based on its state space model, a linear extended state observer (LESO) for state observation and a linear state error feedback (LSEF) control law for disturbance estimation are designed. The second-order linear active disturbance rejection control (LADRC) is introduced into the voltage loop, the stability of the second-order LADRC controller is proved by the Lyapunov stability theory, and the stability conditions are given. Finally, the simulation model of the grid-connected energy storage system is built on the MATLAB/Simulink digital platform, and the low-voltage ride-through fault is designed on the grid-side. The simulation results show that the effect of the second-order LADRC control is better than that of the traditional PI control obviously, which reflects the superiority of the second-order LADRC in controlling the grid-side low-voltage ride-through fault.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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