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Loukriz A.,High School Polytechnic ENP | Dudley S.,London South Bank University | Messalti S.,University of mSila | Quinlan T.,University of Essex | Walker S.,University of Essex
Proceedings of 2016 8th International Conference on Modelling, Identification and Control, ICMIC 2016 | Year: 2016

This paper proposed a Single-Phase 13-level inverter with voltage control method using semiconductor power devices for photovoltaic systems. The multilevel voltage source inverters unique configuration allows them to make high voltages with low harmonics without use of transformers or series associated synchronized switching devices. The general role of the multilevel inverter is to synthesize a desired voltage from several levels of dc voltages for these reason multilevel inverters can simply provide the high power required of a large electric drives. The proposed inverter system gives superior voltage regulation, smooth results and efficiency compared to multi-level inverters. The inverter is capable of producing thirteen levels of output voltage levels (Vpv, 5Vpv/6, 4Vpv/6, 3Vpv/6, 2Vpv/6, Vpv/6, 0, -Vpv/6, -2Vpv/6, -3Vpv/6, -4Vpv/6, -5Vpv/6, -Vpv). The proposed inverter was demonstrated by using simulation of MATLAB/SIMULINK software. © 2016 University of MEDEA, Algeria.


Loukriz A.,High School Polytechnic ENP | Haddadi M.,High School Polytechnic ENP | Messalti S.,Msila University
ISA Transactions | Year: 2015

Improvement of the efficiency of photovoltaic system based on new maximum power point tracking (MPPT) algorithms is the most promising solution due to its low cost and its easy implementation without equipment updating. Many MPPT methods with fixed step size have been developed. However, when atmospheric conditions change rapidly , the performance of conventional algorithms is reduced. In this paper, a new variable step size Incremental Conductance IC MPPT algorithm has been proposed. Modeling and simulation of different operational conditions of conventional Incremental Conductance IC and proposed methods are presented. The proposed method was developed and tested successfully on a photovoltaic system based on Flyback converter and control circuit using dsPIC30F4011. Both, simulation and experimental design are provided in several aspects. A comparative study between the proposed variable step size and fixed step size IC MPPT method under similar operating conditions is presented. The obtained results demonstrate the efficiency of the proposed MPPT algorithm in terms of speed in MPP tracking and accuracy. © 2015 ISA.


PubMed | Msila University and High School Polytechnic ENP
Type: | Journal: ISA transactions | Year: 2016

Improvement of the efficiency of photovoltaic system based on new maximum power point tracking (MPPT) algorithms is the most promising solution due to its low cost and its easy implementation without equipment updating. Many MPPT methods with fixed step size have been developed. However, when atmospheric conditions change rapidly , the performance of conventional algorithms is reduced. In this paper, a new variable step size Incremental Conductance IC MPPT algorithm has been proposed. Modeling and simulation of different operational conditions of conventional Incremental Conductance IC and proposed methods are presented. The proposed method was developed and tested successfully on a photovoltaic system based on Flyback converter and control circuit using dsPIC30F4011. Both, simulation and experimental design are provided in several aspects. A comparative study between the proposed variable step size and xed step size IC MPPT method under similar operating conditions is presented. The obtained results demonstrate the efficiency of the proposed MPPT algorithm in terms of speed in MPP tracking and accuracy.

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