Bus Voltage Control of Photovoltaic Grid Connected Inverter Based on Adaptive Linear Active Disturbance Rejection

Miao Zhang, Keyu Zhuang, Tong Zhao, Xianli Chen, Jingze Xue, Zheng Qiao, Shuai Cui and Yunlong Gao
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Miao Zhang: School of Automation & Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
Keyu Zhuang: School of Automation & Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
Tong Zhao: School of Automation & Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
Xianli Chen: School of Automation & Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
Jingze Xue: School of Automation & Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
Zheng Qiao: School of Automation & Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
Shuai Cui: School of Automation & Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
Yunlong Gao: School of Automation & Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266061, China

Energies, 2022, vol. 15, issue 15, 1-20

Abstract: According to the traditional voltage and current double closed-loop control mode, the inverter management strategy for photovoltaic grid connection has insufficient anti-interference ability and slow response. This paper proposes a control strategy that applies adaptive-linear active disturbance rejection control (A–LADRC) to the outer loop control to achieve the purpose of anti-interference. The control strategy uses the linear extended state observer (LESO) to evaluate external interference caused by the change of external conditions and the internal disturbance caused by parameter uncertainty. PD controller compensates the disturbances and adds adaptive control to simplify parameter adjustment. Finally, this paper takes advantage of Lyapunov theory to conduct stability analysis. Compared with the traditional linear active disturbance rejection control (LADRC), the superiority of this control strategy is verified. The experimental results show that the system has better control performance and anti-interference ability in the face of various disturbances.

Keywords: PV system; adaptive control; LADRC; grid connected inverter; DC bus voltage (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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