Scientific and technical journal

«Automation and Informatization of the fuel and energy complex»

ISSN 0132-2222

Automation and Informatization of the fuel and energy complex
A simulation model for identifying the causes and sources of natural gas imbalance in a pipeline gas transportation system

UDC: 681.514:681.518.2:681.518.3:681.518.5
DOI: 10.33285/2782-604X-2022-3(584)-37-48

Authors:

KOSTANDYAN ARTUR V.1,
GORBUNOV SERGEY S.2,
EGOROV ALEXANDER F.3,
SIDOROV VALERY V.4

1 KSIMATIC, Moscow, Russian Federation
2 MCE-Engineering, Moscow, Russian Federation
3 D. Mendeleev University of Chemical Technology, Moscow, Russian Federation
4 National University of Oil and Gas "Gubkin University", Moscow, Russian Federation

Keywords: gas transportation system, identification, simulation model, algorithm, compressor station

Annotation:

The article presents an approach to developing a simulation model of a gas transportation pipeline system, taking into account the characteristics of compressor stations (CS) in order to determine the causes and sources of natural gas imbalance. When calculating the gas balance in a gas transportation system, both directly measured and calculated parameters are used. The errors of direct and indirect (estimated) measurements of unmeasured parameters significantly affect the formation of transported natural gas balance in the gas transportation system. A theoretical solution and practical implementation of quick detection and elimination of possible unbalance causes of transported gas will provide a qualitatively new level of the gas transporting system control. The combined approach to control gas balance in a pipeline gas transporting system using formal and informal methods of mathematical modeling of the object (analytical and statistical methods) and algorithms of identification of possible imbalance causes are considered. Development of a simulation model of the pipeline gas transportation system is based on the physical principles of the hydraulics of the transported gas flow, mass, energy balance and technical characteristics of compressor stations, which is the key element of the gas transportation system that determines natural gas transportation mode. In order to determine the parameters of the operational mode of the pipeline gas transportation system (pressure and flow rate) by means of a simulation model, a Newton – Raphson iteration calculation procedure is used, which ensures prompt results and decision-making with respect to optimizing the operational modes, identification of possible reasons of gas imbalance, etc. Using the mode parameters of a compressor station operation obtained from the simulation model, the costs of a compressed natural gas portion as a fuel for gas compressor units (own needs costs) both during operation and for various configurations during the design of an optimal pipeline gas transmission system are assessed. A comprehensive algorithm for assessing the sources and causes of natural gas imbalance using a simulation model of natural gas transportation is presented.

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