Design of sophisticated algorithms for calculation of asymmetrical fault currents in multi-wire Overhead Power Transmission Lines

Georgiy Egamnazarov

The aim of the research is design of sophisticated algorithms for choosing Ground Wires on multi-wire Overhead Power Transmission Lincs, which allow to take into account parameters along the whole length of the line
Scientific novelty of the research is consisted of the following:
dependence of calculated values of currents in wires at asymmetrical short circuit modes on parameters of multi-wire Overhead Power Transmission Lines (tower geometry, span length, types of phase and ground wires) on the basis of the use of sparse matrices was determined;
equivalent resistances of Ground Wires on Overhead Power Transmission Lines with taking into account tower total grounding resistances were improved;
algorithm for thermal stability calculations of Ground Wires to asymmetrical short circuit currents on the base of presenting Overhead Power Transmission Lines as multi-wire system was improved;
possibility of reducing current levels in Ground Wires with embedded Optical Cables at asymmetrical faults on the base of tower grounding resistance insulations made on substations was developed.

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