Vol. 337 No. 2 (2026)
DOI https://doi.org/10.18799/24131830/2026/2/5403
Advanced voltage selection model for a gas field electrical distribution grid
Relevance. In the development of a gas fields, an important function is performed by the power supply system. One of the main criteria affecting the reliability of the power supply system is the correctly selected voltage class. In a market economy, on the one hand, the power supply system must be technically reliable, providing continuous power supply to consumers, on the other hand, it must be optimal in terms of capital and operating costs. Existing mathematical models for selecting the voltage class are based on the life cycle of a field, but they do not take into account the drilling period. Currently, many oil and gas companies are forming requirements for the power supply of drilling rigs via two overhead power line circuits. Aim. To develop a mathematical model for the rational choice of voltage for an electric distribution grid, taking into account the drilling period of gas wells and the entire life cycle of gas field development. Object. The power supply scheme of a gas field. Methods. Theory of experimental planning, calculation of discounted costs, statistical method. Results and conclusions. It was revealed that the nature of the electrical load of the drilling rig has a sharply variable load schedule, while that of a gas-condensate well cluster is uniform. To account for the feature of the electrical load, it is proposed to introduce the simultaneity coefficient in the mathematical model. Thus, the mathematical models take into account five factors: the number of gas-condensate well clusters, the length of the power line, the load growth coefficient, the load distribution coefficient, and the simultaneity coefficient. The authors have developed a mathematical model for choosing rational voltage and seven mathematical models for calculating discounted costs for voltage classes 3, 6, 10, 20, 35, 110, 220 kV. Mathematical models have the form of a regression equation of a polynomial type. The significance of the coefficients of the polynomials is estimated using the Student's t-criterion. The adequacy of mathematical models is verified by the Fisher's criterion. The accuracy of the model calculation is 11.36%, which is considered sufficient for technical and economic tasks. The rational voltage of the distribution electric grid of a particular deposit (Urat=35 kV) was selected. It was established that a correctly selected voltage class at the design stage, taking into account the drilling period and the entire life cycle of the field operation, can save up to 40% of discounted costs for the development of the distribution grid.
Keywords:
drilling rig, voltage selection, discounted costs, experimental planning theory, cluster of gas wells, deposit, simultaneity coefficient, distribution grid, electrical load
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