Modeling and control of a photovoltaic energy system using MPPT algorithm (original) (raw)
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Modeling and Control of a Photovoltaic Energy System Using the State-Space Averaging Technique
American Journal of Applied Sciences, 2010
Problem statement: This study presented the modeling and control of a stand-alone Photovoltaic (PV) system using the state-space averaging technique. Approach: The PV module was modeled based on the parameters obtained from a commercial PV data sheet while state-space method is used to model the power converter. A DC-DC boost converter was chosen to step up the input DC voltage of the PV module while the DC-AC single-phase full-bridge square-wave inverter was chosen to convert the input DC comes from boost converter into AC element. The integrated state-space model was simulated under a constant and a variable change of solar irradiance and temperature. In addition to that, maximum power point tracking method was also included in the model to ensure that optimum use of PV module is made. A circuitry simulation was performed under the similar test conditions in order to validate the state-space model. Results: Results showed that the state-space averaging model yields the similar performance as produced by the circuitry simulation in terms of the voltage, current and power generated. Conclusion/Recommendations: The state-space averaging technique is simple to be implemented in modeling and control of either simple or complex system, which yields the similar performance as the results from circuitry method.
Mathematical Modeling and Controller for PV System by Using MPPT Algorithm
Vestnik IzhGTU imeni M.T. Kalashnikova , 2021
In this research, the study theory of system includes the use of an important source of renewable energy sources (solar source) and linking this system with an electrical load. The world is witnessing a significant rise in fossil fuel prices since the ending of the 20th century and now, this rise in price increases with the decrease in inventory day after day. Therefore, it turned that the field of attention to researchers of power generation to expand in nonconventional energy sources (new and renewable energy sources). New and renewable energy is inexhaustible in use because they rely on renewable natural resources. The mathematical model is an important part of the detailed study for PV systems. As well as study models for photovoltaic systems via the MATLAB/Simulink, this programming environment contains many models for renewable systems intended to perform simulation and analysis. Solar cells system needs to apply the MPPT algorithm due to the instability of external circumstances such as solar radiation and temperature. At a constant temperature of 25 °C, as the radiation level increases, the current and voltage of the module increase, this leads to an increase in output power. At a constant radiation level of 100 W/m2, as the module temperature increases, the current increases and the voltage decreases, this causes the output power to decrease. The maximum power is reached at 17 V and 3.5 A by the MPPT method. The Perturb and Observe algorithm is used to achieve maximum power.
Modelling/Simulation of MPPT Techniques for Photovoltaic Systems Using Matlab
International Journal of Advanced Research in Computer Science and Software Engineering
This paper deals with simulation/modelling, controlling of maximum power point tracking (MPPT) used in PV systems to maximize the output power of photovoltaic system, irradiation conditions irrespective of the temperature of VI characteristics of load. In this research an important maximum power point tracking technique has been developed, consisting a boost converter, which is controlling pulse given by a microcontroller-based unit. The method used in the proposed PV system for tracking maximum power is perturb & observe algorithm which is directly used to take control action by duty cycle of converter for varying load voltage, thus the complexity of the PV system will be reduced. The result has high-efficiency, lower-cost and can be easily controlled and modified to handle more energy sources. MPPT is a fully electronic system. It varies the electrical operating point of the modules so that they are able to deliver maximum available power.
Analysis of mathematical modeling of PV module with MPPT algorithm
2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC), 2015
This paper presents the mathematical modeling of photovoltaic (PV) module with the effective comparison of two popular maximum power point tracking (MPPT) techniques namely. Generally, Maximum Power Point Tracking (MPPT) techniques are used in PV System to extract maximum possible power which in turn depends on solar irradiance and temperature of PV module. Two most widely used MPPT techniques namely incremental conductance (INC), and perturb & observe (P&O) method are analyzed in this paper. The PV models compared are simplified single diode model, improved two diode model and simplified two-diode model. The effectiveness of the comparison has been done through MATLAB/Simulink Environment and the results are analyzed. Index Terms-maximum power point tracking (MPPT) photovoltaic (PV) module, single-diode model, improved twodiode model, simplified-two diode model, modeling & simulation
Modeling and Simulation of a Stand-alone Photovoltaic System
— In the future solar energy will be very important energy source. More than 45% of necessary energy in the world will be generated by photovoltaic module. Therefore it is necessary to concentrate our forces in order to reduce the application costs and to increment their performances. In order to reach this last aspect, it is important to note that the output characteristic of a photovoltaic module is nonlinear and changes with solar radiation and temperature. Therefore a maximum power point tracking (MPPT) technique is needed to track the peak power in order to make full utilization of PV array output power under varying conditions. This paper presents two widely-adopted MPPT algorithms, perturbation & observation (P&O) and incremental conductance (IC). These algorithms are widely used in PV systems as a result of their easy implementation as well as their low cost. These techniques were analyzed and their performance was evaluated by using the Matlab tool Simulink.
Modelling & Simulation of PV System using Different MPPT Techniques
2015
In this paper a new maximum power point tracking algorithm for photovoltaic arrays is proposed. The algorithm detects the maximum power point of the PV. The computed maximum power is used as a reference value (set point) of the control system. ON/OFF power controller with hysteresis band is used to control the operation of a Buck chopper such that the PV module always operates at its maximum power computed from the MPPT algorithm. The major difference between the proposed algorithm and other techniques is that the proposed algorithm is used to control directly the power drawn from the PV. The proposed MPPT has several advantages: simplicity, high convergence speed, and independent on PV array characteristics. The algorithm is tested under various operating conditions. The obtained results have proven that the MPP is tracked even under sudden change of irradiation level.
A Comparative Study of Power Control of Stand-Alone PV Generation System with & Without MPPT
2015
The need for renewable energy sources is on the rise because of the delicate energy crisis in the world. Solar energy is a fundamental unexploited resource in a tropical country like ours. The main obstacle for the access and reach of solar PV systems is their quite low efficiency and high capital investment cost. Solar panels have a nonlinear voltage-current characteristic, with a distinct maximum power point (MPP), which depends on the environmental factors, such as temperature and irradiation and solar cell material. Therefore maximum power point (MPP) of PV cells changing with solar irradiation & ambient temperature. In order to continuously bring in maximum power from the solar cell panels, they have to operate at their MPP in spite of the usual changes in the environment. This is why the controllers of all solar power electronic converters employ some method for maximum power point tracking (MPPT). Over the past decades many MPPT techniques have been published. The first objective of this paper is to study and analyze them. This paper investigates in detail the concept of Maximum Power Point Tracking (MPPT) algorithm which significantly increases the efficiency of the standalone solar photovoltaic system compare with without having MPPT algorithm technique.
Modeling And Simulation Of Photovoltaic Module With MPPT
This paper presents modeling and simulation of a photovoltaic (PV) module employs with maximum power point tracker (MPPT) used as a learning device in Universiti Malaysia Pahang (UMP). This model is based on mathematical equations and is described through an equivalent circuit including a photocurrent source, a diode, a series resistor and a shunt resistor. The modeling, simulations and MPPT algorithm of the system will be modeled and simulated using MATLAB script using actual irradiance data. Simulation results will be presented in terms of comparisons of the PV module characteristics between the manufacturers graph and MATLAB model and also its performance such as total output power produced between the sunniest and cloudiest day using perturb & observe (P&O) method.
Indonesian Journal of Electrical Engineering and Computer Science
This paper introduces a procedure for the modelling of a PhotoــVoltaic (PV) cell and the application of maximum power point tracking (MPPT) in step-by-step with MATLAB/Simulink. The model of one diode is used to explore the characteristics of IــV and PــV curves of 60W PV module. Due to the non-linear and time varying of PV characteristics, the generated power of the PV is continually varying with atmospheric conditions like temperature and irradiation, the MPPT technology is very important to chase maximum power point (MPP) on the PــV curve to obtain maximum output power from PV array. This study focuses on two common types algorithms of MPPT, namely perturb and observe (P&O) and incremental conductance (INC). A DC--DC boost converter is implemented to regulate the voltage output from the PV array's and for the application of MPPT algorithm.