Performance Comparison of PID and Fuzzy Controllers in Distributed MPPT

2015 ◽  
Vol 6 (3) ◽  
pp. 625 ◽  
Author(s):  
Chandani Sharma ◽  
Anamika Jain
Keyword(s):  
Variable Temperature ◽  
Impedance Matching ◽  
Standard Test ◽  
Green Technology ◽  
Buck Converter ◽  
Power Switching ◽  
Modeling And Control ◽  
Point Tracking ◽  
Technology Applications ◽  
Power Point

With an increase of Green Technology applications, Photovoltaic have emerged as the most appropriate solution for electricity generation purposes. However, due to variable temperature and irradiance, under the partial or shaded conditions Maximum Power Point Tracking is needed to determine highest efficiency of the system. The paper describes dynamic modeling and control of variable temperature and irradiance on solar panel in SIMULINK-MATLAB environment. The implementation of Buck Converter is used for power switching and impedance matching on connecting the panel to the load. The effectiveness of the model, with enhanced efficiency through voltage stabilization, is performed using Proportional-Integral-Derivative and Fuzzy-Logic-Controllers. A comparative study is made for PID and FLC on the basis of outputs to deal with online set point variations. FLC gives closer results to Standard Test Conditions when compared with PID. The Fuzzy system developed, using tested membership functions serve as a platform for sustainable standalone and grid-based applications using distributed MPPT.   With an increase of Green Technology applications, Photovoltaic have emerged as the most appropriate solution for electricity generation purposes. However, due to variable temperature and irradiance, under the partial or shaded conditions Maximum Power Point Tracking is needed to determine highest efficiency of the system. The paper describes dynamic modeling and control of variable temperature and irradiance on solar panel in SIMULINK-MATLAB environment. The implementation of Buck Converter is used for power switching and impedance matching on connecting the panel to the load. The effectiveness of the model, with enhanced efficiency through voltage stabilization, is performed using Proportional-Integral-Derivative and Fuzzy-Logic-Controllers. A comparative study is made for PID and FLC on the basis of outputs to deal with online set point variations. FLC gives closer results to Standard Test Conditions when compared with PID. The Fuzzy system developed, using tested membership functions serve as a platform for sustainable standalone and grid-based applications using distributed MPPT.       <br />

Comparison between Seven MPPT Techniques Implemented in a Buck Converter

2019 ◽  
Vol 12 (6) ◽  
pp. 476-486
Author(s):  
Lahcen El Mentaly ◽  
Abdellah Amghar ◽  
Hassan Sahsah
Keyword(s):  
Value Added ◽  
Buck Converter ◽  
Maximum Power ◽  
Solar Irradiation ◽  
Solar Panels ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Pv Panel ◽  
Low Efficiency ◽  
Power Point

Background: The solar field on our planet is inexhaustible, which favors the use of photovoltaic electricity which generates no nuisance: no greenhouse gases, no waste. Methods: It is a high value-added energy that is produced directly at the place of consumption through photovoltaic (PV) solar panels. Notwithstanding these advantages, the maximum power depends strongly on solar irradiation and temperature, which means that a Maximum Power Point Tracking (MPPT) controller must be inserted between the PV panel and the load in order to follow the Maximum Power Point (MPP) continuously and in real time. In this work, MPP’s behavior was simulated at different temperatures and solar irradiations using seven techniques which identify the MPP by different methods. Results: The novelty of this work is that the seven MPPT methods were compared according to a very selective criterion which is the MPPT efficiency as well as a purely digital duty cycle control without using the PI controller. The simulation under the PSIM software shows that the FLC, TP, FSCC, TG, HC and IC methods have almost the same efficiency of 99%, whereas the FOCV method had a low efficiency of 96%. Conclusion: This makes it possible to conclude that the best methods are FLC, HC and IC because they use fewer sensors compared to the rest.

scholarly journals Direct and indirect vector control of a doubly fed induction generator based in a wind energy conversion system

2019 ◽  
Vol 9 (3) ◽  
pp. 1531
Author(s):  
Manale Bouderbala ◽  
Badre Bossoufi ◽  
Ahmed Lagrioui ◽  
Mohammed Taoussi ◽  
Hala Alami Aroussi ◽  
...  
Keyword(s):  
Wind Energy ◽  
Wind Power ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Modeling And Control ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point ◽  
Doubly Fed ◽  
And Control

<p>In the recent years, the development and the exploitation of renewable energy knew a great evolution. Among these energy resources, the wind power represents an important potential for that the wind system has been the subject of several researches. The purpose of this study is to improve the power extracted from wind energy, taking into consideration the variation of wind speed which causes a problem in energy production. For this purpose, we have controlled the powers whether it is active or reactive delivered by the generator. This paper, presents essentially the modeling and control of doubly- fed induction generator (DFIG), which is connected to a variable speed wind turbine. Firstly, the model of the wind power system with the maximum power point tracking (MPPT) strategy is shown. Then, the modeling of doubly- fed induction generator (DFIG) and its power control is presented. Finnaly, to ensure the attitude of these controls the simulations is presented in the Matlab/Simulink environment.</p>

scholarly journals Design and development of three stages maximum power tracking solar charge controller

2020 ◽  
Vol 18 (3) ◽  
pp. 1270
Author(s):  
N.H. Abdul Rahman ◽  
A. M. Omar ◽  
E. H. Mat Saat ◽  
N. I. Ilham ◽  
M. Z. Hussin ◽  
...  
Keyword(s):  
Low Voltage ◽  
Buck Converter ◽  
Maximum Power ◽  
Battery Charging ◽  
Set Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Bulk Absorption ◽  
Three Stages ◽  
Power Point

<span>This paper presents the design of a Three Stages Maximum Power Point Tracking (MPPT) charge controller for improving the charging/discharging control of the battery. In this research, Buck Converter is used to regulate the voltage from the Photovoltaic (PV) module to the required voltage. This research is limited to Valve Regulated Lead Acid (VRLA) battery for 12V system voltage. The charge control algorithm envisages controlling the charging and discharging action in all the three stages of battery charging, bulk, absorption, and float. The idea is to control the battery charging and discharging status until meeting the battery set-point. The set-point is limited to High Voltage Disconnect (HVD), Low Voltage Disconnect (LVD) and Load Voltage Reconnect (LVR) to protect the battery from over-charging and deep-discharging. The results obtained demonstrate the good performance of the charge controller. With the application of the MPPT algorithm in the bulk stage, the time taken to get the battery to fully charged state becomes faster The regulation power from the converter to the inverter has performed well and the switching relay is managed to be controlled.</span>

Use of Parameter Extraction Techniques for the Evaluation of the Performance of CdTe Based Solar Array

2019 ◽  
Vol 11 (11) ◽  
pp. 1036-1040
Author(s):  
D. Roy ◽  
I. Mal ◽  
D. P. Samajdar
Keyword(s):  
Variable Temperature ◽  
Maximum Output Power ◽  
Parameter Extraction ◽  
Standard Test ◽  
Solar Array ◽  
Maximum Output ◽  
Maximum Power Point ◽  
Coupled Equations ◽  
Pv Array ◽  
Power Point

Two mathematical models are used for parameter extraction of a CdTe based Photovoltaic (PV) array that delivers a maximum output power of 50 kW. The two sets of extracted parameters are used to design the array and the non-linear coupled equations representing the I–V and P–V equations of the equivalent array structure have been solved using Bisection method and Newton Raphson methods respectively. The performance of the designed array using the extracted parameters under Standard Test Condition (STC) as well as varying temperature and irradiance levels is observed. A detailed comparative analysis of the designed array using both the models is done to monitor the change in Fill Factor (FF), efficiency (η) and Maximum Power Point (MPP) under STC and variable temperature and irradiance conditions by including the loss resistances RS and RP in the equivalent circuit of the designed PV array module.

Novel MPPT Schemes with Direct Duty Ratio Perturbation for Solar PV Systems

2012 ◽  
Vol 622-623 ◽  
pp. 1039-1047
Author(s):  
P. Venkata Sriram ◽  
Bhattacharya Swagnik
Keyword(s):  
Research Work ◽  
Standard Test ◽  
Duty Ratio ◽  
Solar Pv ◽  
Pv Systems ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Perturb And Observe ◽  
Direct Duty ◽  
Power Point

The Maximum Power Point Tracking (MPPT) is a very important function in a Solar Photovoltaic (SPV) system. While previous research has been focussed on optimizing the performance of the MPPT, there is further scope to improve upon the MPPT efficiency without compromising on the complexity of the MPPT technique in terms of the algorithm and hardware requirements. The research work presented in this paper aims to address this gap. The paper presents two novel MPPT schemes which are the proposed Perturb and Observe (P&O) and proposed Incremental Conductance (IC) methods based on two-step control and direct duty ratio perturbation. The proposed techniques are efficient, computationally less complex and hardware minimal than previous study in this field. For verification, simulation has been performed for extensive irradiation profiles of Standard Test Conditions (STC), rapidly changing and gradually changing insolation conditions which are representative of the boundary cases. Results of the proposed MPPT methods are compared with that of conventional MPPT methods. The results show that proposed MPPT schemes have excellent tracking efficiency and dynamic response with respect to previous research.

scholarly journals Performance analysis and enhancement of direct power control of DFIG based wind system

2021 ◽  
Vol 12 (2) ◽  
pp. 1034
Author(s):  
Mohamed Amine Beniss ◽  
Hassan El Moussaoui ◽  
Tijani Lamhamdi ◽  
Hassane El Markhi
Keyword(s):  
Power Control ◽  
Wind Turbine ◽  
Reactive Power ◽  
Control Technique ◽  
Direct Power ◽  
Direct Power Control ◽  
Modeling And Control ◽  
Point Tracking ◽  
Wind Turbine System ◽  
Power Point

<span lang="EN-US">The paper proposes a complete modeling and control technique of variable speed wind turbine system (WTS) based on the doubly fed induction generator (DFIG). Two levels back-to-back converter is used to ensure the energy transfer between the DFIG rotor and the grid. The wind turbine to operate efficiently, a maximum power point tracking (MPPT) algorithm is implemented. Then, direct power control (DPC) strategy has been combined with the MPPT technique in order to guarantee the selection of the appropriate rotor voltage vectors and to minimize the active and reactive power errors. Finally, the simulation is performed by using MATLAB/simulink platform basing on 7.5KW DFIG wind generation system, and the results prove the effectiveness of our proposed control technique.</span>

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