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

2021 4th International Conference on Energy, Electrical and Power Engineering (CEEPE) Pub Date : 2021-04-23 DOI:10.1109/CEEPE51765.2021.9475645

Pinghua Ning, Xiao-hai Pan, Xingguo Xia, Qingfeng Zhang, Liyun Shen

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Abstract

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.

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SOA优化反演控制在单级光伏逆变器控制中的应用

单级光伏并网逆变器需要同时实现最大功率点跟踪(MPPT)和逆变器功能。系统的非线性和强耦合特性使得控制非常复杂。传统的控制方法容易导致系统稳定性差，直流母线电压崩溃等问题。针对上述问题，提出了一种寻道优化算法(SOA)优化反演(BS)控制的设计方案。首先，在$\alpha {-} \beta$静态坐标系下建立了有功与无功解耦三相并网逆变器系统的数学模型，然后设计了逆变器的BS控制器。在此基础上，利用SOA对MPPT中BS控制的不足进行了识别和优化。利用李亚普诺夫稳定性理论证明了控制器的稳定性。结果表明，该方案能较好地实现最大功率跟踪和并网功能，并具有良好的稳定性和鲁棒性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2021 4th International Conference on Energy, Electrical and Power Engineering (CEEPE)

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