Search results for: CABLE, FINITE ELEMENT MODELING (FEM), PARTIAL DISCHARGE (PD), SOLID DIELECTRIC, VOID - Bridge of Knowledge

Search

Search results for: CABLE, FINITE ELEMENT MODELING (FEM), PARTIAL DISCHARGE (PD), SOLID DIELECTRIC, VOID

Search results for: CABLE, FINITE ELEMENT MODELING (FEM), PARTIAL DISCHARGE (PD), SOLID DIELECTRIC, VOID

  • Characterization of Defects Inside the Cable Dielectric With Partial Discharge Modeling

    Publication
    • K. Qasim
    • S. S. Refaat
    • H. Abu-Rub
    • A. H. Toliyat
    • M. Olesz
    • A. Darwish

    - IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT - Year 2020

    The continuous monitoring of power system devices is an important step toward keeping such capital assets safe. Partial discharge (PD)-based measurement tools provide a reliable and accurate condition assessment of power system insulations. It is very common that voids or cavities exist in every solid dielectric insulation medium. In this article, different voids are modeled and analyzed using an advanced finite element (FE)-based...

    Full text to download in external service

  • Propagation Characteristics of Partial Discharges in an Oil-Filled Power Transformer

    Publication
    • S. M. Kameli
    • S. S. Refaat
    • A. Ghrayeb
    • H. Abu-Rub
    • J. Guziński

    - Year 2023

    Power transformers are among the most important assets in the power transmission and distribution grid. However, they suffer from degradation and possible faults causing major electrical and financial losses. Partial discharges (PDs) are used to identify the insulation health status and their degradation level. PDs are incipient, low-magnitude faults caused by localized dielectric breakdown. Those activities emit signals in many...

    Full text to download in external service

  • The Effect of Protrusions on the Initiation of Partial Discharges in XLPE High Voltage Cables

    Publication

    - Bulletin of the Polish Academy of Sciences-Technical Sciences - Year 2021

    This paper is focusing on 3D Finite Elements Analysis (FEA) based modelling of protrusions as defects or imperfections in the XLPE high voltage cable. This study is aiming to examine the impact protrusions have on the initiation of partial discharges. Spherical and ellipsoidal protrusions with different sizes at the conductor screen of the high voltage cable is an essential content of this paper. In addition, a spherical gas-filled...

    Full text available to download

  • Inception and Propagation of Electrical Trees in the Presence of Space Charge in HVAC Extruded Cables

    Publication
    • M. A. Saleh
    • S. S. Refaat
    • M. Olesz
    • H. Abu-Rub

    - IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION - Year 2021

    This paper presents the space charge impact on the inception and propagation of electrical trees in cross-linked polyethylene (XLPE) insulation via simulations and experimentation. A 3D finite element analysis (FEA)-based modeling is proposed to simulate electrical trees via a needle embedded on the XLPE insulation. The proposed FEA model demonstrates the influence of the space charge magnitude and polarity on the initiation of...

    Full text to download in external service

  • Numerical Methods

    e-Learning Courses
    • P. Sypek
    • M. Rewieński

    Numerical Methods: for Electronics and Telecommunications students, Master's level, semester 1 Instructor: Michał Rewieński, Piotr Sypek Course description: This course provides an introduction to computational techniques for the simulation and modeling of a broad range of engineering and physical systems. Concepts and methods discussed are widely illustrated by various applications including modeling of integrated circuits,...

  • Special Issue "Applications of Finite Element Modeling for Mechanical and Mechatronic Systems"

    Publication

    - Applied Sciences-Basel - Year 2021

    Numerical modeling is very important in today's engineering because, among other things, it reduces the costs associated with prototyping or predicting the occurrence of potentially dangerous situations during operation in certain defined conditions. Different methods have so far been used to implement the real structure into the numerical version. The most popular have been variations of the finite element method (FEM). The aim...

    Full text available to download

  • Finite Element Method

    e-Learning Courses
    • B. Sobczyk
    • M. Malikan

    Item Name : Finite Element Method- Abaqus learning Field of study : Civil Engineering Faculty : Faculty of Civil and Environmental Engineering Education level : Second degree studies Form of studies : Full-time studies Year of studies : 1 Study semester : 2 Start of the semester : November 2021 Academic year of the course : 2021/2022 Form of classes : Lecture, Laboratory

  • Finite element/mode-matching analysis of ferrite/dielectric line junctions of arbitrary cross-section

    This paper is focused on the analysis of line junctions obtained as a cascade of dielectric and ferrite guides of arbitrary cross-section. The main application of such structures is nonreciprocal devices such as isolators, circulators, or phase shifters. The efficient finite element/mode-matching approach is proposed to the analysis of such structures. In this approach, thefiniteelementmethod is applied todetermine propagation...

    Full text to download in external service

  • Finite Element Method Applications - winter 2022/2023

    e-Learning Courses
    • W. Witkowski
    • A. Sabik
    • B. Sobczyk
    • S. Burzyński
    • Ł. Pyrzowski

    Finite Element Method Applications - summer 2022/2023 Seminar.

  • Finite Element Method Applications - summer 2022/2023

    e-Learning Courses
    • W. Witkowski
    • A. Sabik
    • B. Sobczyk
    • S. Burzyński
    • Ł. Pyrzowski

    Finite Element Method Applications - summer 2022/2023 Seminar.

  • Finite Element Method Applications - winter 2023/2024

    e-Learning Courses
    • W. Witkowski
    • A. Sabik
    • B. Sobczyk
    • Ł. Pyrzowski

    Finite Element Method Applications - winter 2022/2023 Seminar.

  • Finite Element Method Applications 2023/2024 Summer

    e-Learning Courses
    • B. Sobczyk

    Finite Element Method Applications - summer semester 2023/2024 Seminar.

  • GPU-accelerated finite element method

    Publication

    In this paper the results of the acceleration of computations involved in analysing electromagnetic problems by means of the finite element method (FEM), obtained with graphics processors (GPU), are presented. A 4.7-fold acceleration was achieved thanks to the massive parallelization of the most time-consuming steps of FEM, namely finite-element matrix-generation and the solution of a sparse system of linear equations with the...

    Full text to download in external service

  • A Review: Applications of the Spectral Finite Element Method

    The Spectral Finite Element Technique (SFEM) has Several Applications in the Sciences, Engineering, and Mathematics, which will be Covered in this Review Article. The Spectral Finite Element Method (SFEM) is a Variant of the Traditional Finite Element Method FEM that Makes use of Higher Order Basis Functions (FEM). One of the most Fundamental Numerical Techniques Employed in the Numerical Simulation is the SFEM, which Outperforms...

    Full text available to download

  • Modeling and Evaluation of Electric Treeing Phenomena in Polymeric Cable Insulation

    Publication
    • Q. Khan
    • S. S. Refaat
    • H. Abu-Rub
    • H. Toliyat
    • M. Olesz

    - Year 2021

    This paper investigates the treeing phenomenon in polymeric materials such as crosslinked polyethylene (XLPE) that is widely used in medium and high voltage power cables as primary insulation. The modeling of electrical tree growth in the insulation from its initiation to breakdown is significant research work that illustrates the discharge dynamics and its impact on aging process in polymeric insulation. This study utilizes pulse...

    Full text to download in external service

  • Atomic-Scale Finite-Element Modeling of Elastic Mechanical Anisotropy in Finite-Sized Strained Phosphorene Nanoribbons

    Nanoribbons are crucial nanostructures due to their superior mechanical and electrical properties. This paper is devoted to hybrid studies of the elastic mechanical anisotropy of phosphorene nanoribbons whose edges connect the terminals of devices such as bridges. Fundamental mechanical properties, including Young’s modulus, Poisson’s ratio, and density, were estimated from first-principles calculations for 1-layer, 3-layer, and...

    Full text available to download

  • Dielectric Barrier Discharge Systems with HV Generators and Discharge Chambers for Surface Treatment and Decontamination of Organic Products

    Publication

    - ENERGIES - Year 2020

    The article presents applications of systems with power electronic converters, high voltage transformers, and discharge chambers used for nonthermal, dielectric barrier discharge plasma treatment of a plastic surface and decontamination of organic loose products. In these installations, the inductance of the high voltage transformers and the capacitances of the electrode sets form resonant circuits that are excited by inverters....

    Full text available to download

  • Surface Dielectric Barrier Discharge Plasma Actuators

    Publication
    • E. Moreau
    • A. Debien
    • N. Benard
    • T. N. Jukes
    • R. D. Whalley
    • K. Choi
    • A. Berendt
    • J. Podliński
    • J. Mizeraczyk

    - ERCOFTAC Bulletin - Year 2013

    This paper presents a part of the works conducted in the Plasmaero European project (task 1.1) on surface dielectric barrier discharge actuators applied to airflow control. The study is divided into several parts. In the first part, the goal is to enhance the electric wind produced by a typical single DBD actuator by optimization of the active electrode shape. For instance, the use of a thin wire instead of a plate air-exposed...

    Full text to download in external service

  • Reference FEM model for SHM system of cable-stayed bridge in Rzeszów

    The paper presents the references model for structural health monitoring system (SHM) of cable-stayed bridge recently constructed in Rzeszów over Wisłok River. The SHM system is design to provide on-line information on the structure state and facilitate its maintenance procedures. The main feature of the SHM system is permanent observation of the dynamic behavior of the bridge with focus on cable vibrations. The paper discusses...

  • GPU-Accelerated 3D Mesh Deformation for Optimization Based on the Finite Element Method

    This paper discusses a strategy for speeding up the mesh deformation process in the design-byoptimization of high-frequency components involving electromagnetic field simulations using the 3D finite element method (FEM). The mesh deformation is assumed to be described by a linear elasticity model of a rigid body; therefore, each time the shape of the device is changed, an auxiliary elasticity finite-element problem must be solved....

    Full text available to download