3D Computation of the Overhead Power Lines Electric Field (original) (raw)
Related papers
Electrical Field Around The Overhead Transmission Lines
2012
In this paper, the computation of the electrical field distribution around AC high-voltage lines is demonstrated. The advantages and disadvantages of two different methods are described to evaluate the electrical field quantity. The first method is a seminumerical method using the laws of electrostatic techniques to simulate the two-dimensional electric field under the high-voltage overhead line. The second method which will be discussed is the finite element method (FEM) using specific boundary conditions to compute the two- dimensional electric field distributions in an efficient way.
Numerical Determination of Electric Field Around a High Voltage Electrical Overhead Line
This paper proposes a mathematical model of electric field caused by high voltage conductors of electric power transmission systems using the finite elements method. The numerical computation of electric field around of a high voltage 110 kV electrical overhead line is analyzed. The six conductors of a 110 kV transposed high voltage transmission line with double circuit are considered. The spectrum of electric field intensity close to the overhead electric power line and the studied body are analyzed using the ANSYS Multiphysics software package. The results obtained by simulation confirm that the electrostatic field computation for the conductor system and a human body lead to an accurate result. The used method can be useful in the design of the transmission power lines for estimating the insulation distance.
Computation of the overhead power line electromagnetic field
2008 16th International Conference on Software, Telecommunications and Computer Networks, 2008
This paper presents a novel computational algorithm for the determination of the overhead power line electromagnetic fields. Algorithm is based on the separation of the phase conductor currents into its longitudinal and transversal components and application of the Biot-Savart law for the computing of the magnetic field. Longitudinal component of the electric field is computed from vector magnetic potential, while two other components of the electric field are computed from the transversal currents, which are obtained by the average potential method. Typical example of the 110 kV overhead power line is also considered.
Engineering, Technology & Applied Science Research
In order to decide the appropriate arrangements of fictitious charges in the charge simulation method, the use of the Monte Carlo method is proposed for the estimation of the probability density function of two variables, the radius ratio, and the angle ratio. Τhe scale and shape parameters of the Weibull's distribution are determined by the maximum likelihood estimator. The obtained results are used to calculate the electric field at arbitrary points in the neighborhood of high voltage transmission lines. The comparisons between the results computed by this method, the results calculated by the genetic algorithm, and those measured, confirm the effectiveness and accuracy of the proposed method.
3D Computation of the Power Lines Magnetic Field
Progress In Electromagnetics Research M, 2015
In this paper, a 3D quasi-static numerical algorithm for computation of the magnetic field produced by power lines is presented. These power lines can be overhead power line phase conductors and shield wires or buried cable line phase conductors. The basis of the presented algorithm is the application of Biot-Savart law and the thin-wire approximation of cylindrical conductors. The catenary form of the power line conductors is approximated by a set of straight cylindrical segments. By summing up contributions of all conductor segments, magnetic field distribution is computed. On the basis of the presented theory, a FORTRAN program PFEMF for computation of the magnetic flux density distribution was developed. For each conductor catenary, it is necessary to define only global coordinates of the beginning and ending points and also the value of the longitudinal phase conductor current. Global coordinates of beginning and ending points of each catenary segment are generated automatically in PFEMF. Numerical results obtained by program PFEMF are compared with results obtained by simple 2D model and results obtained using software package CDEGS.
Simulation of the Electromagnetic Field in the Vicinity of the Overhead Power Transmission Line
European Journal of Electrical Engineering, 2019
The purpose of this study is to evaluate the electromagnetic emission of the overhead power line, because these power line generate electromagnetic interaction with other objects near to it. The novelty of this work shows a numerical simulation of the electromagnetic field of the 400 kV line in both permanent and transient states at different positions, based on the finite element method using numerical software. Through the results of this study, it was found that the electromagnetic field in the transient state is very important. The findings of this research can be used to evaluate the field created around transmission lines in order to determine their impact on the environment and human health.
Comparison of 2D algorithms for the computation of power line electric and magnetic fields
European Transactions on Electrical Power, 2010
Three different two-dimensional (2D) algorithms for the computation of the electric fields of both overhead power lines and buried cable lines are described and compared. The first algorithm developed in this paper takes into account a short straight overhead power line and approximates the conductor charge density by a parabola. The second algorithm takes into account a short, straight power line and approximates the conductor charge density by a constant. The third algorithm is based on a simplified approach that analyses an infinite, straight power line. Furthermore, two different 2D algorithms for the computation of power line magnetic flux density are described and compared. One of these algorithms takes into account the short, straight overhead or buried power line, whereas the other takes into account an infinite straight power line. The effect of neglecting the shield wires in the electric field intensity computation is also discussed.
Computation of Electric Fields Inside Large Substations
IEEE Transactions on Power Delivery, 2009
Calculation of electric field based on integral equations approach and suited to solving large-scale problems is presented. Integral equations are solved by appliance of BEM and Galerkin method. Unknown distribution of the surface charge density is approximated by bicubic splines, which ensure smooth approximation of sources. Accurate calculation of electric fields requires detailed modeling of power system equipment inside substations. This results in large models, which are solved by parallel computing. Numerical results are compared to measured fields inside a 400 kV substation. Comparison shows good agreement, thus approving applicability of the proposed approach in analysis of exposure to electromagnetic fields and electromagnetic compatibility. Index Terms-Boundary-element methods (BEMs), electric fields, Galerkin method, integral equations, substations. NOMENCLATURE Coefficient of expansion for linear elements. Matrix of. Unknown coefficient of surface charge density. Phasor of electric-field strength in a calculation point. Basis function for the rectangular and cylindrical elements. Unknown coefficient of linear charge density. Length of the th linear element. Number of basis functions for linear elements. Number of linear segments. Number of bicubic surfaces. Dimensionless parameters of polynomial expansions. Vector distance of a calculation point. Vector distance of a referent point on a source. Surface of 2-D elements. Basis function for the thin-wire elements. Linear segment. Surface segments.
Electric field effects of bundle and stranded conductors in overhead power lines
Computer Applications in Engineering Education, 2011
High-voltage overhead power lines are a source of quasi-static electric and magnetic fields and also of audible noise and electromagnetic interferences due to corona activity. Electrical engineers have the responsibility to design and to maintain such lines, so it is very important that they acquire sufficient knowledge about these subjects while they are studying. Bundle and stranded conductors modify the spatial distribution of the electric field generated by the power line and also affect the corona onset conditions. This article describes the implementation of a method that models the behavior of electric fields generated by any three-phase power line. Different configurations of overhead power lines are analyzed. The proposed methodology has been contrasted with results from other authors and with available experimental data. ß
Computation of the power line electric and magnetic fields
This paper presents a novel numerical algorithm for computing of the power line electric and magnetic fields. Phase conductor currents are separated into their longitudinal and transversal components. Computation of the magnetic flux density is based on the Biot-Savart law. Longitudinal component of the electric field intensity is computed from vector magnetic potential. Two other components of the electric field intensity are computed from the transversal currents, which are obtained by the average potential method.