Behavior of nine levels NPC three-phase inverter topology interfacing photovoltaic system to the medium electric grid under variable irradiance

2018 ◽  
Vol 100 (3) ◽  
pp. 2129-2145 ◽  
Author(s):  
Rabiaa Mechouma ◽  
Hamza Mebarki ◽  
Boubekeur Azoui
Keyword(s):  
Photovoltaic System ◽  
Electric Grid ◽  
Phase Inverter ◽  
Three Phase ◽  
Inverter Topology ◽  
Three Phase Inverter

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.

COMPONENT MINIMIZED TOPOLOGY OF DC TO THREE-PHASE INVERTER

2004 ◽  
Vol 13 (04) ◽  
pp. 863-875 ◽  
Author(s):  
MIRO MILANOVIC ◽  
FRANC MIHALIC ◽  
DRAGO DOLINAR
Keyword(s):  
Phase Transformation ◽  
Theoretical Analysis ◽  
Single Phase ◽  
Main Element ◽  
Two Phase ◽  
Phase Inverter ◽  
Three Phase ◽  
Phase Converter ◽  
Inverter Topology ◽  
Three Phase Inverter

A DC to three-phase converter based on using a two-phase to three-phase transformation has been developed. To provide a better understanding of the operation principle, the transformer, which is the main element of the system, has been supplied by two single-phase inverters. According to this, the theoretical analysis of the proposed system is shown. This analysis is based on two-phase to three-phase transformation. The theoretical analysis and the experimental verification of the proposed principle are presented. In this paper the component minimized inverter topology is also proposed.

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