Affiliation:
1. JP Elektrodistribucija-Beograd, Belgrade, Serbia
Abstract
The considered problem appears as the consequence of the fact that many metal
installations surrounding power lines in urban areas are situated under the
surface of the ground and cannot be visually determined or verified. This
paper presents the methodological version that enables solving the problem
in the case of cable lines with cross-bonding, but it can also be applied
with higher accuracy to cable lines with no applied cross-bonding than the
existing one. It is based on the test measurement of currents appearing in
two cable line phase conductors during a simulated ground fault in the
supplied HV substation. By using the here-presented methodology it is
possible to put the grounding problem of high-voltage distribution
substations into realistic frameworks. Its application in practice shows
that the actual conditions for solving this problem are much more favorable
than was considered before.
Publisher
National Library of Serbia
Reference16 articles.
1. IEEE Guide for Safety in AC Substation Grounding, IEEE Std. 80, 2000.
2. Short-Circuits Currents in Three-Phase A.C. System-Part 3:Currents During Two Separate Simultaneous Line-to-Earth Short Circuit and Partial Short-Circuit Flowing Trough Earth, IEC Int. Std. 60909-3, Ed. II, 2003.
3. Lj. M. Popović, "Determination of the Reduction Factor for Feeding Cable Lines Consisting of Three Single-Core Cables" IEEE Transactions on Power Delivery 18 (3) (2003) 736-744.
4. Lj. M. Popović, "Improved Analytical Expressions for the Determination of the Reduction Factor of the Feeding Line Consisting of Tree Single-Core Cables", European Trans. Electr. Power, vol. 18, pp. 190-203, 2008.
5. R. Benato et al., "Ground Return Behavior in High Voltage Alternating Current Insulated Cables", Energies, vol. 7, no. 12, pp. 8116-8131, 2014.