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Register a new userModeling and simulation solar panels and perform it power using perturbation and observation algorithm (P&O) to tracking maximum power point MPPT
نمذجة و محاكاة الألواح الشمسيّة و تحسين استطاعتها باستخدام خوارزمية الاضطراب و المراقبة لملاحقة نقطة الاستطاعة العظمى
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يتناول البحث تحليل و دراسة أداء الألواح الشمسية، حيث اخترنا العمل على اللوح (الموديول) الشمسي MSX-50، بالإضافة إلى تحسين استطاعته عن طريق تعقّب نقطة الاستطاعة العظمى MAXIMUM POWER POINT، و يتم ذلك باستخدام مقّطع رافع للجهد الحصول على أكبر استطاعة ممكنة من اللوح الشمسي. تم ّوضع نموذج رياضي مكافئ لعمل اللوح الشمسي الحقيقي (غير مثالي) من خلال دراسة الخلايا الكهروضوئيّة (PHOTOVOLTAIC CELLS)، حيث تمّ استخدام الطريقة التكرارية بالإضافة لخوارزمية نيوتن-رافسون من أجل تحديد قيمة المقاومة التسلسلية للموديول Rs، و المقاومة التفرعية Rp. كما تم تنفيذ خوارزمية الاضطراب و المراقبة Perturbation and Observation P&O، بالإضافة إلى دراسة و تصميم دارة المقطّع chopper و اختيار مكونّاتها L,C (المكثف و الملف) بناءً على تحديد كلٍّ من تردد عمل المقطع و عاملي التموج للجهد و التيّار. بناءً على ماسبق، قمنا بإجراء عملية النمذجة للموديول الشمسي MSX-50 باستخدام برنامج MATLAB/SIMULINK، حيث صممنا واجهة مستخدم رسومية GUI لعرض خصائص الموديول و حساب المقاومتين Rs,Rp، بالإضافة إلى بناء خوارزمية P&O و تصميم دارة المقطّع الرافع للجهد (boost-step up). تمّ تطبيق النموذج المقترح على حمولة أومية وفق مبدأ ملاحقة نقطة الاستطاعة العظمىMPP ،و مناقشة النتائج لحالتي توصيل الموديول الشمسي على الحمل مباشرةً، و التوصيل عن طريق مقطّع مقاد بخوارزمية P&O.
This paper deals with the analysis and study of performance of solar panels, so we choose working on the solar panel (module) MSX-50, in addition to improve his power by tracking the maximum power point, this is done by using boost (step up) chopper to obtain the largest possible capacity of solar panel. We will determine a mathematical model equivalent to the real solar panel (not ideal) through studying photovoltaic cells, where we will use the iterative method in addition to the Newton-Raphson algorithm in order to determine the value serial resistance of module Rs parallel resistance of module Rp. As has been the implementation of perturbation and observation p&o algorithm in addition studying and designing the circuit of step up (boost) chopper, and selection the components (coil L, capacitor C), based on both the operation frequency f, ripple factor of output voltage and output current . Based on the our study, we have performed a modeling process of the solar module MSX-50 using MATLAB/SIMULINK program, where we designed a graphical user interface GUI to display the module characteristics and calculate resistance Rp and Rs, in addition to build an algorithm p&o and design circuit of boost (step up) chopper. The proposed model has been applied to the ohmic load according to the principle of the maximum power point tracking MPPT, and discuss the results of two cases wich are the following the solar module is connected directly to load, connected through chopper driven by p&o algorithm.
References used
Introduction to Photovoltaic Systems, in Renewable Energy TheInfinite Power of Texas
Alsayid.B .Modeling and Simulation of Photovoltaic Cell/Module/Array with Two-Diode Model.International Journal of Computer Technology and Electronics Engineering .Vol.1, Issue.3, June 2012
Jallad.j.design and simulation of a photovoltaic system with maximum power control to supply a load with alternating current
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Fuzzy logic control is used to connect a photovoltaic system to the electrical grid by using three phase fully
controlled converter (inverter), This controller is going to track the maximum power point and inject the
maximum available power from th
e PV system to the grid by determining the trigger angle that must be
applied on the switches: Linguistic variables are going to be chosen to determine the amount of change in
the trigger angle of the inverter to track the maximum power.
Photovoltaic systems (PVs)offer an environmentally friendlysource of electricity;
however, up till now its price is still relatively high.Achieving the maximum power of
these systemsand maintaining it with lowest price in real applications is highl
y associated
with Maximum Power Point Tracking (MPPT) under different operation conditions.
This paper proposes the use of Genetic Algorithm (GA) for tracking maximum
power point depending on the solar cell model. GA gives, directly and precisely, the
optimal operating voltage (VOP) of the cell where the DC/DC converter will be adjusted
according to it based on the previous knowledge of the open circuit voltage (VOC) and
short circuit current (ISC) of the cell.
To validate the correctness and effectiveness of the proposed algorithm, MATLAB
R2010a programs for GA and PV system are written and incorporated together where the
series resistant of the cell is considered while the shunt resistant is neglected.
Simulation results of applying GA on different types of solar panels showedthe
possibilityof the accurateadjusting of the voltagetothe optimum valueand thusoperating the
systemat maximum power point.
The limitations of global resources of fossil and nuclear fuel, has necessitated
an urgent search for alternative sources of energy. Therefore, a new way has to be
found to balance the supply and demand without resorting to coal and gas fuelled
ge
nerators.Environment safety has become very important for any energy system,
Increasing demand of conventional sources has further increases the need and
optimizes cost of non-conventional energy sources.
This paper has analyzed the development of a method for the mathematical
modeling of PV System.behavior of the PV Array with series resistance model are
studied in this paper. Included effects are: temperature dependence, solar radiation
change, diode ideality factor and series resistance influence,and shows the
mathematical modeling of stand-alone PV system and then compare withAnalysis
of Perturb and Observe MPPT and without MPPT simulation of photovoltaic
modules with Matlab/Simulink, And Calculate the increase in efficiency resulting
from the use of technology MPPT.
This research deals with improving the efficiency of solar photovoltaic (PV) power
systems using a Maximum Power Point Tracker controller (MPPT controller), based in his
work on the Maximum Power Point Tracking techniques via the direct control met
hod.
Which used to control the duty cycle of DC-DC Voltage Converter, to achieve the
photovoltaic system works at a Maximum Power Point under different atmospheric
changes of the solar insolation and ambient temperature. In this context, our work is
focused on the simulation of the components of the power generating system, such as the
photovoltaic system, DC-DC Boost Converter and a MPPT controller in Matlab/Simulink
environment. The simulating of the MPPT controller was based on several algorithms such
as: Constant Voltage algorithm, Perturb and Observe algorithm and Incremental
Conductance algorithm by using Embedded MATLAB function. The simulation results
showed the effectiveness of the MPPT controller to increase the photovoltaic system power
compared with non-use of a MPPT controller. The results also showed the best
performance of MPPT controller based on Perturb and Observe and Incremental
Conductance algorithm, compared with constant voltage algorithm in tracking the
Maximum Power Point under atmospheric changes.
With the increase in reliance on solar energy to produce electricity, so many maximum power point
tracking techniques for photovoltaic panels were developed to maximize the produced energy and a lot of
these are well established in the literature.
These techniques vary in many aspects such as: simplicity,
convergence speed, digital or analogical implementation, required sensors, cost, range of effectiveness, as
well as in other aspects.
This paper presents a comparative study of ten widely-adopted mppt algorithms; their performance is
evaluated from energy point of view using the simulation tool (Matlab), considering different solar
irradiance variations. Also, an economic evaluation has been made to make a comparison according to
performance and cost, to determine the optimal choice.
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