Linear Active Disturbance Rejection Control of Grid-Connected Photovoltaic Inverter Based on Deviation Control Principle

Xuesong Zhou, Jiayao Wang and Youjie Ma
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Xuesong Zhou: School of Electrical and Electronic Engineering, Tianjin University of Technology, No. 391 Binshui West Road, Xiqing District, Tianjin 300384, China
Jiayao Wang: School of Electrical and Electronic Engineering, Tianjin University of Technology, No. 391 Binshui West Road, Xiqing District, Tianjin 300384, China
Youjie Ma: 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 15, 1-29

Abstract: Photovoltaic grid-connected power generation systems are easily affected by external factors, and their anti-interference performance is poor. For example, changes in illumination and fluctuations in the power grid affect the operation ability of the system. Linear active disturbance rejection control (LADRC) can extract the “summation disturbance” information from the system and eliminate the disturbance at the fastest speed by controlling the signal before it affects the final output of the system. In this paper, an improved linear ADRC based on the principle of deviation control is proposed, and the voltage outer loop is controlled by an improved LADRC. This improved LADRC takes the deviation between each state variable and its observed value as the regulation basis for each state variable of the linear extended state observer (LESO). Based on the analysis of the bode diagram in the frequency domain, it can be concluded that, compared with the unimproved LADRC, the new LADRC has better disturbance rejection performance. The simulation results show that the control performance of the new, improved LADRC is better than that of the unimproved LADRC under different operating conditions, and it has better stability performance and anti-disturbance performance.

Keywords: photovoltaic grid-connected power generation system; frequency domain analysis; linear ADRC; disturbance resistance; linear extended state observer (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 (1)

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