Abstract
Currently, the existing external electricity supply systems for gas fields in Western Siberia are not adapted to the growth of electrical loads by 3 and 4 times due to the implementation of energy-intensive modern gas production technologies (the one of distributed gas compression) at the final stage of gas fields development. Previously, engineering of electricity supply system for gas fields was carried out without considering the implementation of additional capacities, and this led to fundamental reconstruction of the entire electricity supply system for most gas fields in Western Siberia, for example, the power supply system for the Zapadno-Tarkosalinskoe and Yubileynoe gas fields. The main parameter of electricity supply system is the voltage class at which the transmission and distribution of electric energy occurs. The goal of this paper is to develop mathematical models for calculating the optimal voltage class considering the entire life cycle of the field. To achieve this goal, a number of tasks have been solved: all gas fields were classified into three categories by electrical load; factors that significantly affect the voltage class were determined; power supply schemes were constructed for each combination of factors and voltage classes; discounted costs are calculated for each power supply scheme; the type of the target function was proposed; the voltage class with a minimum of discounted costs is determined according to the Lagrange interpolation theory; mathematical models were constructed. Also, the results of calculating the optimization of the electricity supply line of the Medvezhye field on the obtained mathematical models in graphical form are presented in the paper. The following methods were used to solve the problems: methods of experiment planning theory and computer programming methods.
Keywords
Experiment planning theory, voltage class, supply network, discounted costs, electricity supply system, gas field, factor.
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