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

The unified gas system of the Russian Federation is a complex, multi-line system that encompasses a host 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 techno-economic characteristics of their facilities. This study aims to develop methods for determining the aggregated techno-economic characteristics of the gas system facilities. Methodological approaches to aggregating techno-economic characteristics of gas systems and their facilities were analyzed for both Russia and abroad. The procedure of aggregating the calculated gas scheme is given briefly. The study relies on the methods of graph theory, the method of spreading gas costs and losses between source nodes and arcs of aggregated graph; and the method of determining optimal techno-economic indicators for new gas mains and fields (a combinatorial optimization method based on the maximum net present value, given the payback period of new facilities). The proposed approach to aggregating techno-economic characteristics of gas system facilities was employed to create an information base for multi-level modeling of the development of Russia’s gas systems and make calculations for the Unified gas system expansion until 2030.