Output-Feedback Nonlinear Adaptive Control Strategy of the Single-Phase Grid-Connected Photovoltaic System
| Autor: | Abdellatif Hamdoun, Yasser Boussairi, M. Aourir, Abdelmajid Abouloifa, Chaouqi Aouadi, Ibtissam Lachkar |
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| Rok vydání: | 2018 |
| Předmět: |
State variable
Article Subject Computer science 020209 energy lcsh:TJ807-830 020208 electrical & electronic engineering Photovoltaic system lcsh:Renewable energy sources 02 engineering and technology Power factor Grid Maximum power point tracking Control theory 0202 electrical engineering electronic engineering information engineering Grid-connected photovoltaic power system Voltage |
| Zdroj: | Journal of Solar Energy, Vol 2018 (2018) |
| ISSN: | 2314-6230 2356-7635 |
| DOI: | 10.1155/2018/6791056 |
| Popis: | This paper addresses the problem of controlling the single-phase grid connected to the photovoltaic system through a full bridge inverter with LCL-filter. The control aims are threefold: (i) imposing the voltage in the output of PV panel to track a reference provided by the MPPT block; (ii) regulating the DC-link voltage to guarantee the power exchange between the source and AC grid; (iii) ensuring a satisfactory power factor correction (PFC). The problem is dealt with using a cascade nonlinear adaptive controller that is developed making use of sliding-mode technique and observers in order to estimate the state variables and grid parameters, by measuring only the grid current, PV voltage, and the DC bus voltage. The control problem addressed by this work involves several difficulties, including the uncertainty of some parameters of the system and the numerous state variables are inaccessible to measurements. The results are confirmed by simulation under MATLAB∖Simulink∖SimPowerSystems, which show that the proposed regulator is robust with respect to climate changes. |
| Databáze: | OpenAIRE |
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