МАТЕМАТИЧЕСКАЯ МОДЕЛЬ ТЕХНОЛОГИЧЕСКОГО УЧАСТКА МАГИСТРАЛЬНОГО ТРУБОПРОВОДА С РЕГУЛИРОВАНИЕМ ДРОССЕЛИРОВАНИЕМ

Abstract

The aim of the work is to develop a mathematical model of the technological section of the main pipeline, which reflects the main hydraulic processes in the pipeline, namely Q-H characteristics of pressure and main pumping units, their connection diagrams, characteristics of the electric drive part, characteristics of the linear part (length, diameter, thickness of the pipeline ), shut-off linear valves, throttling valves, including a frequency converter, an electric motor with a gearbox and a hydraulic part (flow characteristic). The task is to develop a mathematical model of the main pipeline technological section for further use as part of a simulation stand for an automatic pressure control system (APCS). Research methods are used such as the system analysis method, technical hydraulics, mathematical modelling of operating the main oil pipeline section, considering the switch on and off of the main pumping units and changes in the opening degree of the throttling unit. The research results state that the developed mathematical model of the main pipeline technological section takes into account the basic hydraulic processes and can be used in the simulator software for automatic pressure control systems. The novelty of the work consists in building a mathematical model of the main pipeline technological section with throttling control, adapted for real-time operation for the simulator programmable logic controller. The paper findings state that the proposed mathematical model of the main pipeline technological section with throttling control has some assumptions necessary for the software to operate in real time and reflects the main hydraulic processes occurring in the oil pipeline. Switching the main pumping units and control valves is successfully modelled. The simulation results can be used in the computer program for the software and hardware complex (SHC) of the automation testing simulator and the SHC for setting up the APCS.