Increase of the accuracy of analysis of distribution line modes of electric power systems

A.M. Oleinikov1, L.N. Kanov2

1Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28

2Sevastopol State University, RF, Sevastopol, Universitetskaya St., 33

DOI: 10.33075/2220-5861-2024-4-151-158

UDC 620.92

EDN: https://elibrary.ru/zdgyey

Abstract:

In order to increase the accuracy and reliability of mode calculations of long cable lines on the basis of operational control and assessment of their specific parameters, the possibility of numerical simulation of the distribution line mode of electric power systems based on analytical approximation of the dependence of the specific line parameters on the distance along the length is presented. A method for estimating the dependence of the primary parameters of cable lines is proposed, a mathematical model of the line is built based on the theory of electrical circuits with distributed parameters. It is shown that the analysis of the line mode is reduced to the solution of a system of linear differential equations with variable parameters. An algorithm for solving boundary value problems for the model equations is described, and the application of the described method of analyzing electrical systems using the constructed resistivity approximation is demonstrated by the example of an electrical distribution system with two supply centers and with the ability to accurately determine the location of possible insulation damage at a certain point. A promising area for further research is the further use of the technique to branched electric power systems with several distribution lines and power centers, which will ensure better energy efficiency, condition control and environmental safety of large areas.

Keywords: electric power system, distribution line sections, distributed parameters, complex voltage, current, load, boundary value problems.

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