Application of Sliding-Mode Control for Maximum Power Point Tracking of PV Systems
Sliding-mode controllers are widely utilized for increasing the output power of photovoltaic sources. These sliding-mode controllers are primarily based on one-loop or two-loop schemes. The two-loop scheme is composed of two loops, i.e., searching and tracking loops. A maximum power point searching unit is utilized in the searching loop, and a tracking controller is utilized in the other loop to extract the maximum photovoltaic power. Compared to this scheme, the one-loop scheme can extract the maximum photovoltaic power without any searching algorithm. In this study, dynamic equations of a typical photovoltaic power source are derived using the state-space averaging method. Afterwards, one-loop and two-loop sliding-mode control schemes are used for extracting the maximum power. Stability of both schemes is guaranteed using Lyapunov theory. Conditions of the robust stability are derived analytically for both schemes. A deterministic cuckoo search algorithm is used for maximum power point searching in the two-loop scheme. Performances of the schemes are evaluated by some experiments and numerical simulations. Results are compared in uniform and partially shaded conditions.
The project was financially supported by Iran National Science Foundation (INSF) and University of Tabriz.
- 5.Espinoza-Trejo DR, Brcenas-Brcenas E, Campos-Delgado DU, Angelo CHD (2015) Voltage-oriented input-output linearization controller as maximum power point tracking technique for photovoltaic systems. IEEE Trans Ind Electron 62(6):3499–3507Google Scholar
- 9.Ghazanfari J, Farsangi MM (2013) Maximum power point tracking using sliding mode control for photovoltaic array. Iran J Electr Electron Eng 9:189–196Google Scholar
- 11.Mojallizadeh MR, Badamchizadeh MA (2016) Chattering free full-order terminal sliding-mode control for maximum power point tracking of photovoltaic cells. IET Renew Power Gener 532–539Google Scholar