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Register a new userComparison of traditional MPPT techniques for solar panels
مقارنة الطرائق التقليدية في ملاحقة نقطة الاستطاعة العظمى في اللواقط الشمسية
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مع ازدياد الاعتماد على الطاقة الشمسية بوصفها مصدرًا للحصول على الطاقة الكهربائية، طورت عدة تقنيات لملاحقة نقطة الاستطاعة العظمى المستخدمة في اللواقط الكهروضوئية بهدف الحصول على أعظم طاقة كهربائية يمكن توليدها من النظام الكهروضوئي، و تختلف هذه التقنيات من حيث البساطة و سرعة الأداء و الأدوات المستخدمة فيها (كالحساسات) و الكلفة الاقتصادية. تتضمن هذه الدراسة مقارنة عشر من الطرائق التقليدية المستخدمة في ملاحقة نقطة الاستطاعة العظمى للواقط الكهرضوئية باختلاف أنواعها، إِذ قيم أداؤها من وجهة نظر طاقية باستخدام برنامج Matlab آخذين بالحسبان أشكالا مختلفة للإشعاع ، الشمسي. فضلا عن التقييم الاقتصادي لها؛ و ذلك لإجراء مقارنة بناء على الأداء و الكلفة لتحديد الخيار الأمثل بينها.
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.
References used
J.Schaefer, Review of Photovoltaic Power Plant Performance and Economics, IEEE Trans. Energy Convers., vol. EC-5,pp. 232-238, June, 1990
G.J.Yu, Y.S.Jung, J.Y.Choi, I.Choy, J.H.Song and G.S.Kim, A Novel Two-Mode MPPT Control Algorithm Based on Comparative Study of Existing Algorithms, Proc. Photovoltaic Specialists Conference, 2002, pp. 1531-1534
T.Noguchi, S.Togashi and R.Nakamoto, Short- Current Pulse-Based Maximum-Power-Point Tracking Method for Multiple Photovoltaic-and- Converter Module System, IEEE Trans. Ind. Electron., vol.49, no.1, pp. 217-223, 2002
D.P.Hohm and M.E.Ropp, Comparative Study of Maximum Power Point Tracking Algorithms Using an Experimental, Programmable, Maximum Power Point Tracking Test Bed, Proc. Photovoltaic Specialist Conference, 2000, pp. 1699-1702
كتيبات و دراسات من الشركة السورية الأوكرانية لإنتاج و تسويق اللواقط الكهروضوئية.
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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) choppe
r 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.
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.
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.
Search is based on the first stage DC/DC in the solar photovoltaic system, where it
was appropriate to use Ripple Correlation Control method for tracking the maximum
power point of photovoltaic arrays. The technique takes advantage of the signal ri
pple,
which is automatically present in power converters, where the ripple is interpreted as a
perturbation from which a gradient ascent optimization can be realized. The Basic feature
of Ripple Correlation Control technique converges asymptotically at maximum speed to
the maximum power point, and has simple circuit implementations. And will validate the
results in practice.
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.
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