Finite element solution of monopolar corona on bundle conductors

A modified finite element iterative based method (FEM) is developed to analyze the monopolar ionized field and hence compute the associated corona power loss on bundle conductors (bundles two, three and four are considered). The effect of the number of bundles, and the bundle spacing on the corona current and ground plane current density profiles is investigated. It has been found that with the increase in the number of bundles, the corona current decreases. On the other hand, the corona current increases with the increase in the bundle spacing. A laboratory model was built to check the accuracy of the calculated corona current and the ground plane current density profiles. It has been found that the present results agreed well with the present and previous experimental value

Finite-element solution of monopolar corona on bundle conductors

A finite-element iterative-based method is developed to analyze the monopolar ionized field and, hence, compute the associated corona power loss on bundle conductors (bundles two, three, and four are considered). The effect of the number of bundles, and the bundle spacing on the corona current and ground-plane current density profiles is investigated. It has been found that, with the increase in the number of bundles, the corona current decreases. On the other hand, the corona current increases with the increase in the bundle spacing. A laboratory model was built to check the accuracy of the calculated corona current and the ground-plane current density profiles. It has been found that the present results agreed well with the present and previous experimental value

Finite-element solution of monopolar corona on bundle conductors

A finite-element iterative-based method is developed to analyze the monopolar ionized field and, hence, compute the associated corona power loss on bundle conductors (bundles two, three, and four are considered). The effect of the number of bundles, and the bundle spacing on the corona current and ground-plane current density profiles is investigated. It has been found that, with the increase in the number of bundles, the corona current decreases. On the other hand, the corona current increases with the increase in the bundle spacing. A laboratory model was built to check the accuracy of the calculated corona current and the ground-plane current density profiles. It has been found that the present results agreed well with the present and previous experimental value

Analysis of monopolar ionized field as influenced by ion diffusion

The authors present an analysis of the monopolar ionized field in conductor-to-plane configurations without resort to Deutsch's assumption. An iterative finite-element technique is used to solve Poisson's equation. Satisfying the current continuity condition and updating the space-charge density are based on the application of Kirchoff's current-balance law at each node of the finite-element grid, taking the ion diffusion into account. The proposed method of solution has been applied to laboratory and full-scale models of a monopolar transmission line. The calculated V-I characteristics and the current-density and electric field profiles at the ground plane agreed well with those measured experimentally in comparison with previous calculations. Fast convergence and simplicity in programming characterize the proposed metho

Finite element solution of monopolar corona on bundle conductors

A modified finite element iterative based method (FEM) is developed to analyze the monopolar ionized field and hence compute the associated corona power loss on bundle conductors (bundles two, three and four are considered). The effect of the number of bundles, and the bundle spacing on the corona current and ground plane current density profiles is investigated. It has been found that with the increase in the number of bundles, the corona current decreases. On the other hand, the corona current increases with the increase in the bundle spacing. A laboratory model was built to check the accuracy of the calculated corona current and the ground plane current density profiles. It has been found that the present results agreed well with the present and previous experimental value

A finite-element analysis of bipolar ionized field

This paper describes a new iterative method for the analysis of the bipolar ionized field in HVDC transmission lines without resorting to Deutsch's assumption. The finite-element technique (FET) is used to solve Poisson's equation where the constancy of the conductors' surface field at the corona inception value is directly implemented in the finite-element formulation. The proposed method has been tested on laboratory and full-scale models. The calculated V-I characteristics agreed well with those calculated and measured previously. The dependence of the corona current as well as its monopolar and bipolar components on the conductor height is discussed. The simplicity in computer programming in addition to the low number of iterations required to achieve convergence characterize the proposed method of analysi

Analysis of monopolar ionized field as influenced by ion diffusion

The authors present an analysis of the monopolar ionized field in conductor-to-plane configurations without resort to Deutsch's assumption. An iterative finite-element technique is used to solve Poisson's equation. Satisfying the current continuity condition and updating the space-charge density are based on the application of Kirchoff's current-balance law at each node of the finite-element grid, taking the ion diffusion into account. The proposed method of solution has been applied to laboratory and full-scale models of a monopolar transmission line. The calculated V-I characteristics and the current-density and electric field profiles at the ground plane agreed well with those measured experimentally in comparison with previous calculations. Fast convergence and simplicity in programming characterize the proposed metho

A universal finite-element analysis of the bipolar ionized field

A novel iterative method for the analysis of the bipolar ionized field in HVDC (high-voltage direct-current) transmission lines without resort to Deutsch's assumption is described. The finite-element technique is used to solve Poisson's equation where the constancy of the conductor's surface field at the corona inception value is directly implemented in the finite-element formulation. The proposed method has been tested on laboratory and full-scale models. The calculated V -I characteristics agreed well with those calculated and measured before. The dependency of the corona current as well as its monopolar and bipolar components on the conductors' height is discussed. The simplicity in the computer programming in addition to the low number of iterations required to achieve convergence characterize the proposed method of analysi

Inception voltage of corona in bipolar ionized fields-effect oncorona power loss

In this paper, an iterative finite element based algorithm is presented as a numerical tool for the solution of the bipolar ionized field around high voltage direct current (HVDC) transmission lines. The effect of including unequal values of the positive and negative corona inception voltages and ion mobilities on the corona power loss is investigated. In addition, the effect of ion penetration on reducing the positive conductor corona inception voltage is also studied. The present algorithm is applied to different laboratory and full scale transmission line configurations. Comparison with previously computed V-I characteristics showed that the present computed values were in better agreement with experiments. Also it has been found that the effect of unequal corona inception voltages on the corona power loss (or corona current) is noticeable at applied voltages very near to the inception value