Analysis of Corona Losses on DC Transmission Lines Part II - Bipolar Lines

1969 ◽  
Vol PAS-88 (10) ◽  
pp. 1476-1491 ◽  
Author(s):  
Maruvada Sarma ◽  
Wasyl Janischewskyj
Keyword(s):  
Transmission Lines ◽  
Corona Losses

scholarly journals ECONOMIC CORRECTION OF CURRENT DENSITIES IN THE WIRES OF THE EXISTING OVERHEAD LINES OF 110-220 KV

2019 ◽  
Vol 20 (9-10) ◽  
pp. 25-33
Author(s):  
A. A. Gerkusov ◽  
E. I. Gabdulvalieva
Keyword(s):  
Electric Power ◽  
Cross Sections ◽  
Transmission Lines ◽  
Economic Optimization ◽  
Overhead Lines ◽  
Overhead Transmission Lines ◽  
Current Densities ◽  
Electrical Loads ◽  
Discounted Costs ◽  
Corona Losses

In this article, we present the methods used to date, the choice of the cross-sections of the wires of overhead transmission lines, taking into account not only the losses from the load currents, but also the corona losses and linear insulation of overhead transmission lines. The method of economic optimization of electrical loads and current density in operating air lines is considered, where the target functions are the specific discounted costs for transmission of 1 kW. h of electric power.

scholarly journals Corona Loss Minimization on High Voltage Transmission Line Network using Bundled Conductors.

2020 ◽  
Vol 9 (3) ◽  
pp. 887-891
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Hessian Matrix ◽  
Electrical Power ◽  
Power Transmission Lines ◽  
Long Distance ◽  
Power Stations ◽  
Line Network ◽  
Corona Losses

Electrical power generated and transmitted at a long distance away from the power stations is usually affected by inherent transmission line losses. The Ohmic and Corona losses which are predominantly common in power transmission lines are considered in this paper. These two losses are mathematically modeled with and without embedded bundled conductors. The resultant model which is a non-linear multivariable unconstrained optimized equation is minimized using the Hessian matrix determinant method for stability test purposes. The results obtained show that corona losses are minimized with embedded bundled conductors at a very low current value with large spacing distance between the bundled conductors. The decrease in the corona loss which is a consequence of spacing adjustment of the 2, 3, and 4 strands of bundled conductors was plotted using MATLAB 7.14. The plots obtained are in conformity with the inverse relation between corona loss and conductor spacing.

Analysis of Corona Losses on DC Transmission Lines: I - Unipolar Lines

1969 ◽  
Vol PAS-88 (5) ◽  
pp. 718-731 ◽  
Author(s):  
Maruvada P. Sarma ◽  
Wasyl Janischewskyj
Keyword(s):  
Transmission Lines ◽  
Corona Losses

scholarly journals Bulk FDTD Simulation of Distributed Corona Effects and Overvoltage Profiles for HSIL Transmission Line Design

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2474
Author(s):  
Jon T. Leman ◽  
Robert G. Olsen
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Fdtd Method ◽  
High Volume ◽  
Line Length ◽  
Structure Design ◽  
Fdtd Simulation ◽  
Compact Structure ◽  
Line Design ◽  
Corona Losses

Power system load growth and transmission corridor constraints are driving industry activity in the area of high surge impedance loading (HSIL). Examples include compact structure design and uprating existing transmission lines. Recent research relating electric field uniformity to transmission line capacity and critical flashover voltage underscored the need for better overvoltage data to quantify insulation margins for HSIL design. To that end, this work extends the finite difference time domain (FDTD) method with distributed corona losses to transmission lines with bundled conductors. The model was adapted for practical use in high-volume statistical transient simulation and applied to an example 500 kV line. Transients included line energization and trapped charge reclosing. Overvoltage profiles and statistical distributions were generated from 9500 simulations obtained by random breaker close timing and variation in line length and altitude. Distributed corona losses reduced 98th percentile line-to-ground switching overvoltages by 4%–14% of nominal. The estimated line-to-ground switching surge flashover probability was 54%–80% lower with corona loss. Corona had less impact on line-to-line overvoltages, but the effects were still notable. Results highlight the importance of considering detailed overvoltage profiles and accounting for corona loss attenuation when seeking to carefully quantify insulation design margins.

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