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

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 rej...

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Bibliographic Details
Published in:Energies (Basel) 2022-08, Vol.15 (15), p.5556
Main Authors: Zhang, Miao, Zhuang, Keyu, Zhao, Tong, Chen, Xianli, Xue, Jingze, Qiao, Zheng, Cui, Shuai, Gao, Yunlong
Format: Article
Language:English
Subjects:
adaptive control
Approximation
Control algorithms
Controllers
DC bus voltage
Design
Disturbances
Electric potential
Feedback control
Fuzzy logic
grid connected inverter
Industrial development
Inverters
LADRC
Mathematical models
Parameter uncertainty
Photovoltaics
PV system
R&D
Rejection
Research & development
Robots
Stability analysis
State observers
Voltage
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Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15155556