Application of SOA Optimization Back-stepping Control in Single Stage Photovoltaic Inverter Control

The single-stage photovoltaic grid connected inverter needs to realize maximum power point tracking (MPPT) and inverter functions at the same time. The nonlinear and strong coupling characteristics of the system make the control very complex. The conventional control method is easy to lead to poor s...

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Bibliographic Details
Published in2021 4th International Conference on Energy, Electrical and Power Engineering (CEEPE) pp. 576 - 580
Main Authors Ning, Pinghua, Pan, Xiaobo, Xia, Xingguo, Zhang, Qingfeng, Shen, Liyun
Format Conference Proceeding
LanguageEnglish
Published IEEE 23.04.2021
Subjects
BS control
Inverters
Maximum power point trackers
MPPT
Photovoltaic systems
Power system stability
Reactive power
robustness
single-stage photovoltaicinverter
SOA
Solar energy
Stability analysis
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Summary:The single-stage photovoltaic grid connected inverter needs to realize maximum power point tracking (MPPT) and inverter functions at the same time. The nonlinear and strong coupling characteristics of the system make the control very complex. The conventional control method is easy to lead to poor stability of the system, DC bus voltage collapse and other problems. To solve the above problems, a design scheme of seeker-optimization-algorithm (SOA) optimization back-stepping (BS) control is proposed. Firstly, the mathematical model of three-phase grid connected inverter system with decoupling active and reactive power is established in \alpha {-} \beta static coordinate system, and then the BS controller of inverter is designed. Then the SOA is used to identify and optimize the shortcomings of BS control in MPPT. The stability of the controller is proved by Liyapunov stability theory. The results show that the scheme can achieve the maximum power tracking and grid connected function well, and has good stability and robustness.
DOI:10.1109/CEEPE51765.2021.9475645