Photovoltaic array maximum power point tracking via modified perturbation and observation algorithm (original) (raw)
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Energy , especially alternative source of energy is vital for the development of a country. In future, the world anticipates to develop more of its solar resource potential as an alternative energy source to overcome the persistent shortages and unreliability of power supply. In order to maximize the power output the system components of the photovoltaic system should be optimized. For the optimization maximum power point tracking (MPPT) is a promising technique that grid tie inverters , solar battery chargers and similar devices use to get the maximum possible power from one or more solar panels. Among the different methods used to track the maximum power point, Perturb and Observe method is a type of strategy to optimize the power output of an array. In this method, the controller adjusts the voltage by a small amount from the array and measures power, if the power increases, further adjustments in that direction are tried until power no longer increases. In this research paper the system performance is optimized by perturb and observe method using buck boost converter. By varying the duty cycle of the buck boost converter, the source impedance can be matched to adjust the load impedance to improve the efficiency of the system. The Performance has been studied by the MATLAB/Simulink.
An investigation of photovoltaic system with maximum power point tracking method
Journal of emerging technologies and innovative research, 2018
Nowadays, renewable energy resources play an important role in replacing conventional fossil fuel energy resources. Photovoltaic energy is one of the very promising renewable energy resources which grew rapidly in the past few years. The variation of the operating conditions of the Photovoltaic cell array has one major problem Due to this variation, the voltage at which maximum power can be obtained, is also alter. Solar photovoltaic (PV) systems are distributed energy sources that are an environmentally friendly and renewable source of energy. The objective of this paper is to study and analyze PV systems. In this paper, a PV model is used to simulate PV arrays behavior, and then a Maximum Power Point tracking method using variable step size Perturb and observe (P & O) is proposed in order to control the non inverted buck boost DC-DC converter. Each subsystem is modeled and simulated in a Matlab/Simulink environment. Simulation results shows that the proposed variable step size Per...
—This work proposes a method to reduce the steady state oscillation and to mitigate the probability of losing the tracking direction of the perturb and observed (P&O) based maximum power point tracking (MPPT) for PV system. The modified scheme retains the conventional P&O structure, but with a unique technique to dynamically alter the perturbation size. At the same time, a dynamic boundary condition is introduced to ensure that the algorithm will not diverge from its tracking locus. The modified P&O is simulated in Matlab Simulink and its performance is benchmarked using the standard MPPT efficiency (ηMPPT) calculation. Furthermore, the proposed concept is validated experimentally using a buck-boost converter, fed by a solar PV array simulator (PVAS). Based on the EN 50530 dynamic irradiance tests, the proposed method achieved an average ηMPPT almost 1.1% higher than the conventional P&O when irradiance changes slowly and about 12% higher under fast change of irradiance.
An Approach to Achieve Maximumpower Point Tracking Using PV System for Buck Converter
2014
A solar cell is a non-linear power source and its output power depends on the terminal operating voltage. As the intensity of light falling on the panel varies, its voltage as well as its internal resistance both varies. It is necessary to operate a solar photovoltaic panel at its maximum power point to achieve high efficiency and maximum power transfer. Maximum power point trackers (MPPT) are used to operate a photovoltaic panel at its maximum power point. To extract maximum power from the panel, the load resistance should be equal to the internal resistance of the panel. This Paper represents a simple an systematic approach to achieve an Maximum power transfer in solar micro grid applications by impedance matching with a dc–dc converter with maximum power point tracking by the perturb and observe method. The MPPT is simulated and studied using MATLAB/SIMULINK
The Maximum Power Point Tracking (MPPT) is a technique used in power electronic circuits to extract maximum energy from the Photovoltaic (PV) Systems. In the recent decades, photovoltaic power generation has become more important due its many benefits such as needs a few maintenance and environmental advantages and fuel free. However, there are two major barriers for the use of PV systems, low energy conversion efficiency and high initial cost. To improve the energy efficiency, it is important to work PV system always at its maximum power point. So far, many researches are conducted and many papers were published and suggested different methods for extracting maximum power point. This paper presents in details implementation of Perturb and Observe MPPT using buck and buck-boost Converters. Some results such as current, voltage and output power for each various combination have been recorded. The simulation has been accomplished in software of MATLAB Math works. Maximum Power Point Tracking, Perturb and Observe, DC-DC Converters, Photovoltaic System .
Performance enhancement of solar photovoltaic system using novel Maximum Power Point Tracking
The electrical power supplied by the photovoltaic (PV) array depends on insolation, temperature and load. On the other hand, the actual power produced by the PV array is not fully transferred to the load. Therefore, it is necessary to extract maximum power from PV array. Maximum Power Point Tracking (MPPT) is a power electronic system that extracts maximum power from PV system. MPPT varies the electrical operating point of the PV modules and enables them to deliver maximum available power. In this work, a new MPPT algorithm is designed that uses open circuit voltage and short circuit current, sampled from a reference PV Panel. Using these measurements the maximum power is been tracked from main panel without breaking the power transferred to load. A buck boost converter was used to match impedance between source and load to facilitate maximum power transfer. The proposed algorithm was checked for its performance in local environmental condition.
A New Maximum Power Point Tracking For Photovoltaic Systems
2008
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.
Study of Maximum Power Point Tracking (MPPT) Techniques in a Solar Photovoltaic Array
Maximum power point tracking (MPPT) is used in photovoltaic (PV) systems to maximize the PV array output power, irrespective of the temperature and irradiation conditions and the load electrical characteristics. This paper presents a practical implementation of perturbation and observation (P&O) and incremental conductance (IncCon) algorithms based on PIC18F452 microcontroller for tracking of the maximum power generation from PV system. These algorithms are widely used because of its low-cost and ease of realization. Proposed P&O and IncCon algorithms are implemented and tested under different loads, and the test results are analyzed and compared. The results show the performance of the IncCon algorithm in tracking MPP is better than the P&O algorithm and the experimental results of IncCon algorithm indicate that the feasibility and improved functionality of the system with has high-efficiency.
International journal of engineering research and technology, 2018
With the increasing in the energy demand conservation and utilization of energy are very essential. Hence Solar charge controller helps in increasing the efficiency of the solar power transferred to the battery. Photovoltaic modules show nonlinear output characteristics because of different system losses. Maximum power point tracking (MPPT) is an intelligent technique for reducing these losses by driving the system at its maximum operating point. DC/DC converter is an essential part of a MPPT controlled photovoltaic (PV) system which functions as an interface between PV system and the load. These Converters are mostly Dc Choppers which converts fixed Dc voltage to a variable Dc source. These Regulators are used in case of Solar Charge Controllers to increase or decrease the PV panel voltage to as that required by Battery. The DC voltage from the PV panel varies with the light intensity which depends on time of day and temperature. Similarly, on the Battery side the voltage varies depending on the load connections. Thus, for optimal charging of battery it is important that the voltage of the PV panel and the current matches the battery charging state at any instant. There are various types of Dc-Dc Converter of which Buck Boost Converter is taken into consideration. In this project work we propose an efficient photovoltaic system which will be designed, developed and the results will be validated in real time.
DESIGN AND ANALYSIS OF MPPT BASED BUCK BOOST CONVERTER FOR SOLAR PHOTOVOLTAIC SYSTEM
IAEME Publication, 2020
Maximum power point trackers are so important to improve the efficiency of photovoltaic systems. Many methods have been proposed to achieve the maximum power that the PV modules are capable of producing under different atmospheric conditions. This paper proposed a Perturb and Observe based Maximum Power Point Tracking (MPPT) algorithm for solar system. The solar panel is simulated and analyzed in MATLAB/SIMULINK. Photovoltaic system is connected to a DC-DC Buck-boost converter. The Solar panel can produce maximum power at a certain operating point called Maximum Power Point (MPP).To achieve maximum power and to get maximum efficiency, the whole system must operate at that Maximum Power point. Maximum power point of PV panel keeps same on changing with changing solar irradiance and temperature of cell. Then to obtain maximum power from a PV system, MPPT algorithms are implemented. So that, P & O based MPPT is developed and Simulation results show the effective of the P&O based controller to produce more stable power.