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This paper created a new research space in the faults modeling and detection area of the industrial systems, especially photovoltaic generators. It reserved for modeling and detection the hybrid defects, like the presence of cells open- and short-circuit within the same photovoltaic cells group. For a small investment, the new algorithm created a new platform. It exposed a display screen of the database,...
In this paper, we propose a method to model the Conducted ElectroMagnetic Interference variation (ACEMI) generated by a DC / DC converter based on a MOSFET according to an accelerated aging time. A relation between the ACEMI and the threshold voltage variation (AVtn) is determined by simulation, using a SPICE MOSFET model. Through the literature researches and the measurements we determine the equation...
This paper will present the implementation of traveling wave optical amplifier models for mixed optical-electronic circuit simulation. The model involves a distributed wave equation for both forward and reverse traveling waves and a distributed carrier equation. It provides a multi-mode model of propagation and includes dispersive effects.
This paper presents the effect of modeling the PV array with and without considering the recombination of charge carriers in space charge region. The main aim of the authors is to determine a model which can provide the results close to the experimental results. The series and shunt resistances are estimated using the Newton Raphson method with initial values derived from the basic equations of the...
This paper proposes an analytical, closed-form multi-sine AC-DC voltage multiplier model and investigates the dependency of input and output power on circuit and device parameters. Comparisons of the proposed model with SPICE simulation results are also provided for validation under various circuit parameters, such as the number of stages and capacitance per stage, and device parameters such as saturation...
The photoelectric response of dry bacteriorhodopsin sensors varies depending on whether the incident light is on or off. To model this behavior, we have proposed an electrical equivalent circuit that has a capacitor that varies with the light intensity. In this paper, the proposed model is experimentally validated and found to be appropriate even when the light intensity is changed. The results also...
The design and fabrication of fully-implantable neural measurement systems has been enabled by the continuous miniaturization and increasing integration density of modern CMOS technologies. The use of CMOS processes with small structure sizes benefits the energy consumption and the functionality of modern neural recording systems. However, the miniaturization increases the impact of degradation effects...
Intro: Computer network defense has models for attacks and incidents comprised of multiple attacks after the fact. However, we lack an evidence-based model the likelihood and intensity of attacks and incidents. Purpose: We propose a model of global capability advancement, the adversarial capability chain (ACC), to fit this need. The model enables cyber risk analysis to better understand the costs...
In this paper a novel co-energy modelling framework is presented for a relevant class of linear and nonlinear mechanical systems. The approach uses the classical Brayton-Moser equations which are deduced from a (port-)Hamiltonian description. The approach allows classical results from electrical circuit synthesis and analysis to be carried over exactly to the mechanical domain. It also enables one...
Linear network model configuration is used to show the transducer as a chain of identical ports which are acoustically in cascade but electrically in parallel. The admittance, impedance, transfer function and insertion loss of the equivalent circuit network of the surface acoustic wave transducers made of 640 YZ LiNbO3 at a frequency of 400 MHz are studied and analyzed with the help of MATLAB. Design...
Lithium-ion batteries have gained rapid popularity as an important means for the power sector. It is essential to model the battery in order to predict its behavior under various operating conditions to avoid any wrong operation and to safely manage to increase its life time. This paper introduces the most commonly used battery modelling techniques and their respective equivalent circuit models.
The paper proposes a simple method to estimate the parameters of a one-diode model of PV modules based on particle swarm optimization (PSO) and least square (LS) algorithms. The employed method requires only the PV module nameplate ratings at three points on the I–V curve at Standard Test Conditions: short circuit current, open circuit voltage and maximum power (VMPP, IMPP). The method is verified...
This paper presents practical results of realization and testing of the most famous approaches of model order reduction (MOR) for analog devices in Matlab. The key feature of presented approaches is their realization using mathematical operation singular value decomposition (svd). This paper includes examples of applying methods of model order reduction of linear systems, model order reduction of...
For millimeter-wave CMOS circuit design, accurate device models are necessary. Especially an accurate de-embedding method is very important. Hence, precise deembedding of pad parasitics is the first and valuable step to achieve accurate device models. In this work, a new pad modeling based on an L-2L de-embedding is proposed. The pad model is derived with an assumption that characteristic impedance...
Single line to ground faults is a problem that most often occurs in extra high voltage overhead lines, and generally temporary. This type of disturbance can be quickly eliminated by using a single phase auto reclosures, but a secondary arc phenomenon often makes single phase auto reclosures in the extra high voltage overhead lines failed to work. This research aims to obtain a proper modeling of the...
This paper describes SPICE-compatible macromodels to model the nonlinear behavior of operational amplifiers (Op Amp) and current feedback operational amplifiers (CFOA). The proposed macro-models include not only those performance parameters more important of the Op Amp and CFOA like the dynamic range, slew-rate, DC gain and gain-bandwidth product, but parasitic resistors and capacitors associated...
This paper proposes a new modeling method for buck converter. The new modeling method, named bi-switching status method (BSM), for buck converter is obtained via the propositional calculus and linear constrain. Based on the mixed logical dynamical (MLD) model, BSM model of buck converter is obtained. Compared with other modeling methods, such as MLD method and state-space averaging method, streamlined...
This paper presents an overview of two degradation modes of PV panels: the Moisture Induced Degradation and the Cell Cracks. The two mentioned degradation modes affect PV cells differently according to their position in the module. At a previous stage, we have build a PV model that takes into consideration three degradation modes, the Potential Induced Degradation, the Light Induced Degradation, and...
The modeling and computation of electromagnetic phenomena like lightning surge, switching and transient overvoltage still remain a difficult task within power systems both for design and exploitation purposes. Nowadays, the measures for overhead line protection are reconsidered having in view the electronic equipment sensitivity and the requirements of many consumers regarding the increase of power...
In this paper, we proposed a new mathematical model of a faulty photovoltaic generator operation. It presents its behavior, when it's subjected to the open-circuit and the short-circuit faults at its basic components as: cells, bypass diodes and blocking diodes. Such kind of modeling will allow developing fault detection and diagnosis methods. Indeed, the proposed model will be used to set normal...
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