An Approach to Determining Techno-Economic Characteristics of Aggregated Gas Systems

Abstract

The unified gas system of the Russian Federation is a complex, multi-line system that encompasses a huge number of components and connections. It is virtually impossible to create an exact model that adequately describes all its facilities, hence the need for and relevance of the development of methods for aggregating gas systems. The aggregation of such systems can be conventionally divided into two strands: the aggregation of calculated schemes and the aggregation of technical and economic characteristics of their facilities. This study aims to develop methods for determining the aggregated technical and economic characteristics of the gas system facilities. Methodological approaches were analyzed to aggregate technical and economic characteristics of gas systems and their facilities, both in Russia and abroad. The method of aggregating the calculated gas scheme is given briefly. The study relies on the methods of graph theory, the method of distributing gas costs and losses among source nodes and arcs of aggregated graph; and the method of determining optimal technical and economic indicators for new main gas pipelines and fields (a combinatorial optimization method based on the maximum net present value, given the payback period of new facilities). Based on the proposed methodology for aggregating technical and economic characteristics of gas system facilities, an information base was created for multi-level modeling of the development of Russia’s gas systems and calculations were made for the Unified gas system expansion until 2030.