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2 Journal of Power Technologies

2 2017

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Power quality enhancement in hybrid photovoltaic-battery system based on three-level inverter associated with DC bus voltage control

Belabbas B., Allaoui T., Tadjine M., Denai M.

Journal of Power Technologies

2017

Vol. 97, nr 4

272--282

This modest paper presents a study on the energy quality produced by a hybrid system consisting of a Photovoltaic (PV) power source connected to a battery. A three-level inverter was used in the system studied for the purpose of improving the quality of energy injected into the grid and decreasing the Total Harmonic Distortion (THD). A Maximum Power Point Tracking (MPPT) algorithm based on a Fuzzy Logic Controller (FLC) is used for the purpose of ensuring optimal production of photovoltaic energy. In addition, another FLC controller is used to ensure DC bus stabilization. The considered system was implemented in the Matlab/Simpower environment. The results show the effectiveness of the proposed inverter at three levels in improving the quality of energy injected from the system into the grid.

Comparative study between SPWM and SVPWM control of a three level voltage inverter dedicated to a variable speed wind turbine

Belkacem B., Abdelhakem-Koridak L., Mostefai R.

Journal of Power Technologies

2017

Vol. 97, nr 3

190--200

In this paper, a power production system containing a variable speed wind turbine equipped with a Doubly Fed Induction Generator (DFIG) is presented, the DFIG stator is connected directly to the grid, and the rotor is connected by a three level three phase inverter with a Neutral Point Clamping structure (NPC). This last must be then dimensioned to forward only the available power of the rotor. In this work, a comparative study of two command strategies of the inverter is detailed, by separate order control: Firstly Sinus Pulse Width Modulation (SPWM) and secondly Sinus Vectorial Pulse Width Modulation (SVPWM). All the simulation models are built in MA TLAB/Simulink software and the performance of the control system is evaluated through FFT analysis of results.