Abstract
Currently, most of the gas fields in Western Siberia are at the final stage of their development. The estimated electrical load of one gas well cluster during the period of growth and constant gas production is 100 kW. To extend the cost-effective gas production at the final stage, a number of energy-intensive technologies have been implemented, such as the one of distributed gas compression with the installation of mobile compressor units with electric drive of 1000 kW at gas wellheads. As a result, there is a multiple increase in the electrical load that leads to the necessity to build new overhead transmission lines. For example, to implement the MCU at the Yamburgskoe field, it is necessary to build an overhead transmission line of 10 kV with a length of 480 km. At the moment, engineering of electricity supply system for gas fields and the choice of the voltage class are performed similarly to the ones for the regional network organization and do not take into account the peculiarity of gas fields, that is a multiple increase in the electric load during the entire life cycle of the field (on average, it is about 60 years). Thus, the main problem of the gas industry electro energetics is the choice of the optimal voltage class electricity supply system, taking into account the entire life cycle of the field. The goal of the study is to select an approach for developing a new method for choosing the optimal voltage class for the gas field electricity supply system. To achieve this goal, the paper analyzes the existing methods for choosing the voltage class of electricity supply system. The analysis found that for the development of a new method of choosing the optimal voltage class of a gas field electricity supply system the closest one is the approach that uses the theory of experiment planning, taking into account the following factors specific to the gas industry: the number of installations of gas complex preparation at the field; the coefficient of electric load increase; the coefficient of load distribution on transmission lines; the distance from the electricity source to the consumer. To achieve this goal, we used the experimental and theoretical method (analysis and synthesis).
Keywords
Voltage class, external electricity supply system, power overhead transmission line, experiment planning theory, objective function, discounted costs.
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