Linear Active Disturbance Rejection Control for DC Bus Voltage Under Low-Voltage Ride-Through at the Grid-Side of Energy Storage System

Youjie Ma, Luyong Yang, Xuesong Zhou, Xia Yang, Yongliang Zhou and Bo Zhang
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Youjie Ma: Tianjin Key Laboratory for Control Theory and Application in Complicated Systems, Tianjin University of Technology, Tianjin 300384, China
Luyong Yang: School of Electrical and Electronic Engineering, Tianjin University of Technology, No. 391 Binshui West Road, Xiqing District, Tianjin 300384, China
Xuesong Zhou: Tianjin Key Laboratory for Control Theory and Application in Complicated Systems, Tianjin University of Technology, Tianjin 300384, China
Xia Yang: School of Electrical and Electronic Engineering, Tianjin University of Technology, No. 391 Binshui West Road, Xiqing District, Tianjin 300384, China
Yongliang Zhou: School of Electrical and Electronic Engineering, Tianjin University of Technology, No. 391 Binshui West Road, Xiqing District, Tianjin 300384, China
Bo Zhang: School of Electrical and Electronic Engineering, Tianjin University of Technology, No. 391 Binshui West Road, Xiqing District, Tianjin 300384, China

Energies, 2020, vol. 13, issue 5, 1-22

Abstract: The energy storage inverter system has the characteristics of nonlinearity, strong coupling, variable parameters, and flexible mode switching between parallel and off grid. In order to improve the control performance of the grid-side inverter of the energy storage system, an improved Linear Active Disturbance Rejection Control (LADRC) based on proportional differentiation is proposed to replace the traditional LADRC in the voltage outer loop control. In this paper, the observation gain coefficient of the sum of the disturbances of the traditional Linear Extended State Observer (LESO) is improved to a proportional differentiation link, which effectively reduces the degree of the disturbance observation amplitude drop and the phase lag, and increases the observation bandwidth of LESO. Compared with traditional LADRC, it not only improves the observation accuracy of LESO for disturbance, but also improves the anti-interference performance of LADRC. Finally, the control effects of improved LADRC and traditional LADRC on low-voltage ride-through at different degrees are analyzed and compared through simulation, which proves the rationality of the controller designed in this paper.

Keywords: energy storage grid-connected inverter; linear active disturbance rejection control; linear extended state observer; proportional differential; observation accuracy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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