The Computer System for Optimal Control of Natural Gas Pumping Units

Abstract

Method of the optimal control of the natural gas compression process by a compressor station, which is equipped with gas pumping units with a gas turbine drive, has been developed.
 The parallel scheme of connection of gas pumping units working on the general collector is considered.
 The cost of fuel gas taking into account the power of nitrogen oxide emissions into the atmosphere is chosen as the criterion of optimality. This takes into account the restrictions on technological parameters and the planned task for the transportation of natural gas.
 The formed problem is divided into two subtasks - the choice of the optimal number of parallel units in each of the subgroups and determining the optimal mode of operation of each unit in the group.
 Formalization of optimal control problem of GPA operation takes into account the uncertainty inherent in the process of natural gas compression. For this purpose, the apparatus of fuzzy algebra was used, which made it possible to take into account the inaccuracies that arise both as a result of measuring technological parameters and as a result of processing the obtained data on the technological process.
 The optimal control system is integrated into the upper level (dispatcher) and is an integral part of the overall control system of the GPA and has a hierarchical structure. At the lower level there are measuring devices of technological parameters, which are a source of information for the upper level where the solution of optimization problems takes place.
 The developed methods formed the basis of the algorithmic and software of the computer system for optimal control of a separate unit of the compressor station, which can be integrated into the existing automated system.