scholarly journals Comparative Study of a Photovoltaic System Connected to a Three-Phase Grid by Using PI or Fuzzy Logic Controllers

2021 ◽  
Vol 13 (5) ◽  
pp. 2562
Author(s):  
Petru Livinti
Keyword(s):  
Fuzzy Logic ◽  
Comparative Study ◽  
Electric Power ◽  
Fuzzy Logic Controller ◽  
Electric Energy ◽  
Pi Controller ◽  
Photovoltaic System ◽  
Phase Inverter ◽  
Three Phase ◽  
Three Phase Inverter

This work presents a comparative study for a photovoltaic system connected to a three-phase grid through a three-phase inverter controlled by a fuzzy logic controller or through a proportional-integral (PI) controller. The innovative aspect of this article consists of the elaboration of two models in MATLAB–Simulink for the photovoltaic system consisting of 40 photovoltaic panels and of the control algorithms of the three-phase inverter for each type of controller. The comparative analysis of the results obtained through simulation has established that the use of the fuzzy logic controller (for controlling the three-phase inverter) leads to transferring to the alternative current (AC) grid an electric power of 6.5 kW, whilst the use of the PI type controller leads to transferring to the AC grid an electric power of 4.6 kW under the same value of the intensity of solar radiation. The total harmonic distortion (THD) of the voltage resulting after the filtering circuit has a lower value in case of using the fuzzy logic controller than in case of using the PI controller. Through the usage of the fuzzy logic controller for controlling the inverter, an increase in quantity and quality of the electric energy introduced to an AC grid from a photovoltaic system was noticed, compared to the usage of a PI controller.

scholarly journals Hybrid PV and Wind Energy for Grid Connected System using SEPIC Converter

2019 ◽  
Vol 9 (2S4) ◽  
pp. 552-555
Keyword(s):  
Wind Energy ◽  
Fuzzy Logic Controller ◽  
High Efficiency ◽  
Synchronous Generator ◽  
Photovoltaic System ◽  
Pv System ◽  
Phase Inverter ◽  
Point Tracking ◽  
Three Phase ◽  
Three Phase Inverter

A hybrid generator is designed for both wind energy and photovoltaic system (PV) based on permanent magnet synchronous generator to maintain dc link voltage. In this paper, both the sources are connected with grid through a single ended primary inductor converter (SEPIC) and three phase inverter is followed by SEPIC converter. The fuzzy logic controller used to provide gate pulses for the converter and model predictive controller is providing pulses to three phase inverter which tracking the highest power from the wind and PV system. In the PV system the maximum power point tracking (MPPT) method is used to get higher power from the source. This new hybrid system operation is done by both the effective controllers and system steady is achieved. The integrated energy with high efficiency is directed to grid for distribution and the system is verified in Matlab/Simulink and simulation results are given with model.

scholarly journals Design and Analysis of Three Phase Soft Switching Inverter Incorporating Fuzzy Logic Controller

2019 ◽  
Vol 9 (2) ◽  
pp. 2992-2998 ◽  
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Controller Design ◽  
Soft Switching ◽  
Zero Voltage Switching ◽  
Conduction Loss ◽  
Three Phase ◽  
Three Phase Inverter ◽  
Zero Voltage ◽  
Logic System

A soft switching three phase inverter with the fuzzy logic system is proposed . The controller design is explained in this paper. The soft switching is achieved through zero voltage switching methods.The soft switching is attain through auxiliary circuits.Therefore, the auxiliary circuit will be enhanced the conversion efficiency, and the conduction loss will be scaled down. The performance of proposed controller is illustrated using MATLAB Simulink.The mode of the prototype is fabricated and tested. The Simulation and hardware results validate each other, which show that the presented method is both satisfactory and consistent with expectation.

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