A Robust Second-Order Sliding Mode Control for Single-Phase Photovoltaic Grid-Connected Voltage Source Inverter

Bin Guo, Mei Su, Yao Sun, Hui Wang, Hanbing Dan*, Zhongting Tang, Bin Cheng

*Corresponding author

Research output: Contribution to journalJournal articleResearchpeer-review

21 Citations (Scopus)

Abstract

In this paper, a super-twisting algorithm (STA) second-order sliding mode control (SOSMC) is proposed for single-phase photovoltaic grid-connected voltage source inverters. The SOSMC approach is aimed to inject sinusoidal current to grid with low total harmonic distortion (THD), strong robustness to parameter variations, and fast dynamic response to solar irradiance changes. As the discontinuous sign function in the traditional sliding mode control (SMC) is replaced by the continuous super-twisting function, the chattering problem is eliminated. Furthermore, a robust sliding mode differentiator (SMD) is proposed to acquire the derivative of current reference which is difficult to obtain in practice. The stability of the system under the proposed method is proved through the Lyapunov theory. The experimental results validate that the proposed method has satisfactory performance in both dynamic and steady-state conditions, as well as disturbance rejection.
Original languageEnglish
Article number8693720
JournalIEEE Access
Volume7
Pages (from-to)53202-53212
Number of pages11
ISSN2169-3536
DOIs
Publication statusPublished - Jan 2019
Externally publishedYes

Keywords

  • second order sliding mode control (SOSMC)
  • single-phase photovoltaic grid-connected system
  • sliding mode differentiator (SMD)
  • Super-twisting algorithm (STA)

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