scholarly journals Output-Feedback Nonlinear Adaptive Control Strategy of the Single-Phase Grid-Connected Photovoltaic System

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Abdelmajid Abouloifa ◽  
Chaouqi Aouadi ◽  
Ibtissam Lachkar ◽  
Yasser Boussairi ◽  
Meriem Aourir ◽  
...  
Keyword(s):  
Single Phase ◽  
Sliding Mode ◽  
Adaptive Controller ◽  
Photovoltaic System ◽  
State Variables ◽  
Pv Panel ◽  
Power Exchange ◽  
Adaptive Control Strategy ◽  
Bus Voltage ◽  
Mode Technique

This paper addresses the problem of controlling the single-phase grid connected to the photovoltaic system through a full bridge inverter with LCL-filter. The control aims are threefold: (i) imposing the voltage in the output of PV panel to track a reference provided by the MPPT block; (ii) regulating the DC-link voltage to guarantee the power exchange between the source and AC grid; (iii) ensuring a satisfactory power factor correction (PFC). The problem is dealt with using a cascade nonlinear adaptive controller that is developed making use of sliding-mode technique and observers in order to estimate the state variables and grid parameters, by measuring only the grid current, PV voltage, and the DC bus voltage. The control problem addressed by this work involves several difficulties, including the uncertainty of some parameters of the system and the numerous state variables are inaccessible to measurements. The results are confirmed by simulation under MATLAB∖Simulink∖SimPowerSystems, which show that the proposed regulator is robust with respect to climate changes.

scholarly journals Bus Voltage Control of DC Distribution Network Based on Sliding Mode Active Disturbance Rejection Control Strategy

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1358 ◽  
Author(s):  
Boning Wu ◽  
Xuesong Zhou ◽  
Youjie Ma
Keyword(s):  
Disturbance Rejection ◽  
Sliding Mode ◽  
Distribution Network ◽  
Sliding Mode Controller ◽  
Active Disturbance Rejection Control ◽  
State Variables ◽  
Active Disturbance Rejection ◽  
Dc Distribution ◽  
Disturbance Rejection Control ◽  
Bus Voltage

The DC distribution network has more advantages in power transmission, grid connection of distributed energy, and reliability of power supply when compared with AC distribution network, but there are still many problems in the development of DC distribution network. DC bus voltage control is one of the hot issues in the research of DC distribution network. To solve this problem, in this paper, a new type of sliding mode active disturbance rejection control (SMADRC) controller for AC/DC converters is designed and applied to the voltage outer loop. The linear extended state observer (LESO) can observe the state variables and the total disturbance of the system. The SMADRC is composed of a sliding mode controller, LESO, and disturbance compensator, which can compensate the total disturbance observed by LESO properly. Therefore, it improves the dynamic. At the same time, it can also reduce the system jitter that is caused by sliding mode controller. The state variables that are observed by the LESO are used in the design of sliding mode controller, which greatly simplifies the design of sliding mode controller. Finally, the simulation results of Matlab/Simulink show that the controller has good start-up performance and strong robustness.

Optimization of the fuzzy MPPT controller by GA for the single-phase grid-connected photovoltaic system controlled by sliding mode

2019 ◽  
Author(s):  
Borni Abdelhalim ◽  
Bouchakour Abdelhak ◽  
Bessous Noureddine ◽  
Abdelkrim Thameur ◽  
Lakhdari Abdelkader ◽  
...  
Keyword(s):  
Single Phase ◽  
Sliding Mode ◽  
Photovoltaic System ◽  
Mppt Controller

scholarly journals PV integrated single-phase dynamic voltage restorer for sag voltage, voltage fluctuations and harmonics compensation

2020 ◽  
Vol 11 (1) ◽  
pp. 547
Author(s):  
Toufik Toumi ◽  
Ahmed Allali ◽  
Othmane Abdelkhalek ◽  
Abdallah Ben Abdelkader ◽  
Abdelmalek Meftouhi ◽  
...  
Keyword(s):  
Single Phase ◽  
Control Method ◽  
Sliding Mode ◽  
Power Source ◽  
Voltage Source ◽  
Dynamic Voltage Restorer ◽  
Phase Dynamic ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Bus Voltage

<span>This document proposes a photovoltaic (PV) based single-phase dynamic voltage restoration (DVR) device, it eliminates both sag and swell voltage and compensates for power. The proposed system requires a power source to compensate for the sag/swell voltage. This system has found a simple topology for the DVR that uses PV with two DC-DC boosts converters as the DC power source for the dynamic voltage conservator. The DC/DC boost converter powered by the PV generator is used to increase the voltage to meet the DC bus voltage requirements of the single-branch voltage source inverter (VSI). This system uses renewable energy; saves energy accordingly and supplies power to critical/sensitive loads. The control method used in this work is a Sliding Mode Control (SMC) method and relies on a phase locked loop (PLL) used to control the active filter. The effectiveness of the suggested method is confirmed by the MATLAB/Simulink® simulation results and some prototype experiments. These results show the capacity of the proposed DC link control.</span>

scholarly journals Optimization of dc-bus voltage regulation with grid con-nected single phase bi-directional converter

2018 ◽  
Vol 7 (3.3) ◽  
pp. 409
Author(s):  
V N. Ganesh ◽  
J Ajay Daniel ◽  
D Sivakumar ◽  
S Balaji
Keyword(s):  
Single Phase ◽  
Fuzzy Controller ◽  
Voltage Regulation ◽  
Solar Panel ◽  
Pv System ◽  
Pv Panel ◽  
Logic Control ◽  
Dc Bus ◽  
Bus Voltage ◽  
Excess Power

This paper presents using of alternate input energy source for optimization of DC bus voltage regulation and maintaining of availability of DC bus voltage with grid connected single phase bi-directional converter. Power generated by PV system and DC-DC boost converter with MPPT technology and fuzzy logic control for DC applications. Excess power available in the solar panel will return back to AC grid. DC power will be drawn from the AC grid when the intensity of sun is less. Maximum power output is obtained by using MPPT technique from PV panel. FUZZY controller is also used along with MPPT to control the final DC output voltage regulation of solar panel connected to the DC bus and for smooth power transfer. Simulation and actual experiments results are shared in detail for the implementation of MPPT with FUZZY controller and the modes of operation of Bi-directional converter.  

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