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84 articles for “perturbation”
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Photovoltaic System Based Modified SEPIC Converter with Perturb and Observe Algorithm
Abstract: In recent years, because of the increasing demand of the electrical energy, the solar energy has been considered as one of principal renewable energy sources for electric power generation. As it has low power efficiency; to increase the extracted power from PV system is a matter of concern. To extract maximum power, a maximum power point tracking (MPPT) controller is necessary in a PV system. In this paper, a PV …
Published in Journal of Power Electronics and Power Systems · Vol. 7, Issue 2, 2017 · pp. 33–41 Read article
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Multilevel Inverter Based PV System with MPPT Application
Abstract: Abstract: An improved MPPT converter with voltage and current (perturb & observe) method for photo voltaic (PV) and 5-level H-bridge multilevel inverter is connected to solar panel, applications is presented in this study. The proposed method used to implement maximum power point tracking (MPPT) and convert DC power into AC power by variable reference of voltage and current which is continuously changed during some time (up to 5 sec). In …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 10, Issue 1, 2019 · pp. 42–52 Read article
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Solar Energy Conversion System with Maximum Power Point Tracking
Abstract: AbstractThis paper presents an algorithm that help to track the maximum power point of the solar PV module automatically. Perturb and observe algorithm is most popular algorithm. In this algorithm a slight perturbation is introduced. Due to this perturbation, the power of the module changes. If the power increases due to perturbation then the perturbation is continued in that direction. After the peak power is reached the power at the …
Published in Journal of Instrumentation Technology & Innovations · Vol. 8, Issue 3, 2018 · pp. 15–20 Read article
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Natural Bond Orbital, Bond Order and Frequency based Study of Hydrogen Bond Formation in Different Glycols-Water Complex
Abstract: Natural bond orbital (NBO) analysis, natural atomic orbital (NAO) analysis, Wiberg bond order, vibrational frequency, free energy and enthalpy changes for hydrogen bond formation in different polyethylene glycol + water complex and dipropylene glycol + water complex have been performed by Hatree Fock (HF) method, second order Møller–Plesset perturbation theory (MP2) and Density Functional Theory (DFT) using 6-31++G(d,p) basis set. In order to describe hydrogen bond interaction appropriately, B3LYP DFT-D, …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 4, Issue 1, 2013 · pp. 1–20 Read article
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Phase Behaviour Study of a Mesogen in a Solvent Role of Molecular Rigidity and Configurational Entropy
Abstract: The phase behaviour of a nematogen 4’-n-pentyloxy-4-biphenylcarbonitrile (POBPCB) has been studied with respect to the translational and orientational motions. The charges of atoms and their dipole moments have been estimated by implementing the complete neglect differential overlap (CNDO/2) method. The long-range interactions have been analyzed using modified Rayleigh- Schrodinger Perturbation theory together with the multicentred-multipole expansion scheme. The “6- exp” potential function has been considered to study the short-range interactions. …
Published in Research & Reviews : Journal of Physics Read article
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The Onset of Rayleigh-Bénard-Marangoni Convection in a Ferromagnetic Fluid Layer
Abstract: This study examined the implications of magnetic boundary conditions, which are vertical in nature, on buoyancy and surface tension–driven ferrothermal convection (FTC) in a ferrofluid layer. While the upper surface is stress-free and susceptible to general thermal boundary issues, the bottom surface is stiff and insulating against temperature changes. The eigenvalue issue is solved analytically using the regular perturbation method and numerically using the Galerkin technique. According to analysis, raising …
Published in Journal of Experimental & Applied Mechanics · Vol. 16, Issue 1, 2025 · pp. 1–9 Read article
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Mathematical Approaches to Nonlinear Oscillatory Systems with Damping: Exact and Approximate Solutions
Abstract: The study of nonlinear oscillatory systems with damping is a key area of research in applied mathematics, particularly in the context of dynamical systems, stability analysis, and bifurcation theory. These systems, described by second-order nonlinear differential equations, exhibit a rich variety of behaviors, including periodic, quasi-periodic, and chaotic motions. The introduction of damping—representing energy dissipation—adds a layer of complexity, making the analytical and numerical solution of such systems a challenging …
Published in Recent Trends in Mathematics · Vol. 2, Issue 2, 2025 · pp. 7–11 Read article
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MHD-Assisted Flow Regulation of Viscoelastic Polymer Fluids for Industrial Cooling and Composite Fabrication with Isotherml Plates
Abstract: This study investigates the magnetohydrodynamic (MHD) regulation of viscoelastic polymer fluid flow over a permeable plate, emphasizing its relevance to industrial cooling and composite fabrication. An incompressible, electrically conducting viscoelastic fluid is analyzed under a transverse magnetic field with Hall and ion-slip effects to capture electromagnetic alterations in polymer transport. The governing non-dimensional equations for momentum, temperature, and concentration are solved analytically using the perturbation method. The results show that …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 851–866 Read article
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Font-Based Text Steganography for Covert Communication in Devanagari Script: A Review (2020–2026)
Abstract: Steganography hides the fact that a communication exists rather than merely safeguarding its content. Text is the most challenging of all steganographic media because it contains the least redundancy and is the most sensitive to changes. Devanagari script, with its conjunct consonants, ligatures, matras, and non-linear glyph construction, makes these difficulties even harder, rendering rendering-dependent and OCR- based steganographic methods largely ineffective. This paper presents a systematic review of text …
Published in Emerging Trends in Languages · Vol. 3, Issue 2, 2026 · pp. 22–33 Read article
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Learning of Maximum Power Point Tracking Architecture with Various Algorithms for Photovoltaic Systems: A Review
Abstract: Currently, as the requirement on the Earth for ever more electricity grows, so too accordingly must demands upon renewable energy. These days, with the growth of renewable energy on all fronts, countries everywhere watch its development. Since demand for power generation goes up again, fossil fuels become less and less available, and expense is not coming down. When there is a rapidly changing irradiance, temperature, or partial shading, the output …
Published in Journal of Power Electronics and Power Systems · Vol. 16, Issue 2, 2026 · pp. 14–22 Read article
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Study and Output Performance of PMSG Based WECS by Using MPPT Control Technique
Abstract: AbstractAs we know, our interests in Renewable Energy Resources are increasing day by day. So, the increasing integration of distributed generation sources is accompanied by problems with primary energy resources and policy issues such as economic efficiency. Due to these problems, we have to move towards various techniques which are able to eliminate the above problems. These techniques are called Maximum Power Point Tracking or MPPT. In this paper, the …
Published in Journal of Instrumentation Technology & Innovations · Vol. 9, Issue 2, 2019 · pp. 41–50 Read article
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Thermomagnetic Convection in a Ferrofluid Layer with Throughflow
Abstract: The effect of vertical throughflow on the onset of thermomagnetic convection in a ferrofluid layer in the presence uniform vertical magnetic field is investigated theoretically. Both the boundaries are considered to be rigid-ferromagnetic and insulated to temperature perturbations. The resulting eigenvalue problem is solved numerically using the Galerkin technique as well as analytically by regular perturbation technique with wave number as a perturbation parameter. Results show that the effect of …
Published in Journal of Experimental & Applied Mechanics · Vol. 11, Issue 3, 2020 · pp. 44–53 Read article
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Study on the Method of Constructing a System of Linear Equations for Calculating Aerodynamic Derivatives
Abstract: The aerodynamic derivatives can be calculated from the unsteady hydrodynamic forces experienced by the harmonic-oscillating vehicle. Until now, unsteady flow field analysis in aerodynamic derivative calculations has been applied mainly to thin bodies based on potential theory MSC. Nastran is a typical application based on potential theory MSC. Natran can calculate the aerodynamic derivatives of the vehicle relatively well in the subsonic region, but in the supersonic region, the fuselage …
Published in Journal of Experimental & Applied Mechanics · Vol. 16, Issue 3, 2025 · pp. 14–24 Read article
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Quantum-Fuzzy Tensor Operators and Uncertainty-Band Bifurcation for Symmetry-Preserving State Discrimination
Abstract: A tensor-operator framework is developed for fuzzy conjunction, fuzzy disjunction, and symmetry-preserving state discrimination in multi-qubit quantum systems. In this formulation, fuzzy membership and non-membership degrees are represented through expectations of effect operators acting on density matrices, providing a natural bridge between fuzzy logic and quantum measurement theory. Conjunction and disjunction operations are extended to the quantum domain via tensorised channels, constructed using projective measurements and unitary transformations, enabling logical …
Published in Emerging Trends in Symmetry · Vol. 2, Issue 1, 2026 · pp. 08–15 Read article
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High Gain High Efficiency Single Switch DC–DC Converter for Green Power Source Conversion
Abstract: Efficiency of solar cell is very low and it is preferred to be operated at low voltages; so it is difficult to supply power to a certain load. Conventional boost converter offers limited gain. So a high voltage boosting is needed. Proposed converter consists of coupled inductor and switched capacitor technique to achieve high gain without high duty ratio and turns ratio. In the magnetic field of coupled inductor and …
Published in Journal of Power Electronics and Power Systems · Vol. 8, Issue 3, 2018 · pp. 46–56 Read article
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Performance analysis and implementation of 89C51 controller Based Solar Tracking System with Boost Converter
Abstract: Among the top issues in the modern day is electricity consumption minimization. Particularly in lighting purposes, electricity consumption minimization mode consumes 20% or so of all electricity produced. Often these conventional light bulbs have already been substituted by LEDs, which is an effective technique to cut energy use. The basic solar energy conversion element, the solar panel, is set at a specific angle and is unable to monitor the position …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 2, 2022 · pp. 34–41 Read article
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Design and Simulation of Maximum Power Point Tracking Solar Battery Charge Controller
Abstract: As solar energy is a renewable energy that has the capacity to lessen energy crisis in the world, so there is a strong need to harvest and utilize this energy. This paper describes the simulation of a solar energy based MPPT battery charger controller and a protection system will also be integrated with the design. The proposed design uses PID controller based voltage and current controller for battery charging circuit. …
Published in Trends in Electrical Engineering · Vol. 7, Issue 2, 2017 · pp. 11–20 Read article
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Review Paper on Comparison of DC-DC Converter for MPPT Application in Photovoltaic Power Generation
Abstract: AbstractIn photovoltaic power generation, DC to DC converter play a vital role in improvement efficiency of the whole system. In the PV system, power generation depends upon the solar irradiation and heat from the sun. In PV module only peak value of PV characteristics is considered. To perform the better operation, the extreme point of power tracking method is required. The function of the dc-dc converter in a PV system …
Published in Journal of Computer Technology & Applications · Vol. 10, Issue 2, 2019 · pp. 22–26 Read article
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Hysteresis Current Control Based Grid Connected PV System by using Bidirectional DC-DC Converter
Abstract: This paper proposes a control strategy for the operation of solar energy generation integrated with grid. Boost converter is used to extract the maximum power from the available solar power. The buck converter and bi-directional DC/DC converter connected with common DC bus and it’s connected with different loads. MPPT algorithms have been used in PV systems to deliver the maximum available power to the load under changes of the solar …
Published in Journal of Thermal Engineering and Applications · Vol. 2, Issue 1, 2015 · pp. 26–40 Read article
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BIS Processes in the Human Neural Networks and Asymptotic Periodic Solutions of the Evolution Equations in the Brain Nanosystem using Jacobi Elliptic Function
Abstract: Our perseverance is dependent upon the normal functioning and fluctuation of the brain. That functioning involves complex electrical activities. These in turn generate subtle waves which were first noticed and studied by Hans Berger. These are essentially electrical rhythms in the brain which, when recorded by means of instruments called electroencephalograms or EEG on a roll of paper, appear as complex wave forms. In this paper, based on Jacobi elliptic …
Published in Current Trends in Signal Processing · Vol. 3, Issue 3, 2013 · pp. 11–18 Read article