THE ELECTRIC GRID CAPACITY INCREASING AND THE ENERGY EFFICIENCY IMPROVING FOR THE EXISTING OIL AND GAS CONSUMERS' ELECTRIC POWER SYSTEM

The relevance of the research is caused by the fact that electrical systems of oil and gas consumers are represented mainly by overhead power line made with uninsulated stranded wires type A, AC. At the same time, it is about 55 % of the entire length of the lines of 6-35 kV voltage class that has been in operation for more than 35 years. This means the need of its modernization in the near future. These wires are inferior to other types in terms of reliability and mechanical strength under wind load, but have lower cost and higher heat dissipation. In electrical system oil and gas consumers use self-supporting covered wire (type SCIM less, which have less heat dissipation then type A and AC. In order to increase the mechanical strength, wires of the type ACC, AAAC, ACSR, Aero-Z etc., which have the worst heat dissipation then type A and AC, are used. Thus, a searching for new technical solutions and justification of the choice of conductors' types in terms of the energy efficiency of electrical energy transmission, taking into account the influence of mechanical loads, is an urgent scientific and technical task. The main aim of the work is to increase transmission lines' capacity and improve energy efficiency of the existing electrical systems of oil and gas consumers. Objects: electric power system of oil and gas consumers represented by a distribution electrical network made by overhead lines. Subject of the study is a dependence of the throughput and energy efficiency of the power line transmission of electrical energy on the construction of the overhead line wire. Methods: mathematical analysis, provisions of the theoretical foundations of electrical engineering, mathematical modeling in the software package RastrWin3. Results. Applying mathematical modeling, it was established that the use of the energy-efficient wire construction proposed by the authors can reduce operating costs for power losses on troubled lines by 11,8 %. At the same time, the capacity of the reconstructed sections will increase by 19,6 % without the construction of additional OL 6 kV.