Abstract
Aspects of improving the accuracy of modeling extra-high-voltage (EHV) transmission-line (TLN) modes are considered using data from modern intelligent measurement systems. The methodological errors in modeling the parameters of EHV TLN modes are studied by line equations with distributed parameters. The proposed technique and algorithm of calculating EHV TLN modes rely on an equation of a line with distributed parameters, take account the actual characteristics of corona losses on voltage and the reactive corona effect, and make possible a higher accuracy of modeling. The accuracy of modeling EHV TLN modes is improved using a ladder equivalent circuit. A form of bicomponent equations for modeling overhead line (OHL) corona losses is proposed and justified. The first component is recorded in line equations with distributed parameters as conductivity, whereas the second component is presented as extra load. A program for computer-aided modeling of EHV TLN modes is developed. Results of calculations for 750-kV lines are presented.
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