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

Abstract

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.

Design and Analysis of 400KV Extra High Voltage Power Transmission Lines in Lebanon

“…The surface potential gradient is critical design parameter which determines the level of corona loss, audible noise and radio inference. That's why at high voltage level it is recommended to use bundled conductors [4] where it helps in reducing the corona losses [2].…”

A new method to calculate corona losses for active conductors considering real transmission line unbalance

“…The occurrence and intensity of corona discharges, and hence their losses, is affected by the following factors: The electric field gradient on the conductor surface [16,17], the conductor surface condition [6,18], weather conditions [19][20][21], the relative air density [22,23], the effect of water on the conductor surface [20,22], the average operating voltage of the line [19,24,25], the size of phase conductors [18,26], bundled conductor lines [5,12,16,17], the existence or not of shield conductors [27], the sag value of the phase and shield conductors [28], the line unbalance and the type of structure.…”