# pipeline

## Modelling the Modes of System of Asynchronous Centrifugal Units of Multi-Unit Pumping Station with Serial Connection of Pumps

Based on the current regulations on pipeline transport, the need for a systematic approach to the study of processes occurring in the technological complexes of pumping stations of the main pipelines and their power supply systems is shown.

## Dynamic Modes of Synchronous Electric Drive with Centrifugal Hydraulic Load of Pump Station

The contemporary state of the modelling of the pump station’s electric drive in a complex with its centrifugal hydraulic load has been analysed. It was found that most studies focus either on the modelling and development of automatic control systems for the asynchronous electric drive of pumps or on the optimization of performance indicators of the station as a whole. Besides, usually only one of the subsystems of a pumping station (or an electrically-operated pump unit) is modelled with a good degree of detail: either electromagnetic or hydraulic.

## Method of experimental investigation of the friction facility pneumatic wires

Aim. Development of a method for experimental study of the coefficient of friction for pneumotransport systems of gaseous media using the method of similarity and dimensionality theory, which allows expanding the number of factors and they intervals by grouping them into dimensionless similarity criteria. Method. The planned experiment was chosen for experimental studies of the coefficient of air friction. The main factors were pressure, diameter of the pipeline, air flow.

## Modeling of Hydraulic Load of Electric Drive in Electrical Complex of Pumping Station

The paper analyses the contemporary state of the electric drive hydraulic load modelling in the pumping stations’ electrotechnical complex applications. It was found that in the vast majority of cases, mathematical models do not allow taking into account the specificities of fluid pumping and its consumption at the same time with a balanced degree of detail.

## Rozrakhunok nadzemnoi dilnytsi mahistralnoho truboprovodu na stiikist [Stability calculation for aboveground stations of pipeline]

The mathematical model of stress-strain state aboveground station of pipeline is investigated with taking into consideration interaction aboveground part of pipeline with adjacent to it parts of under­ground pipeline. The underground parts of pipeline which leaning on the soil are considered as elastic Winkler type basis. Local we­akening station of pipe­line in connections areas under­ground part of pipe­line with aboveground part are simu­lated by the in­troduction elastic joints into a system.

## Регулювання напору в гідравлічній системі

The problem of the pressure control in the pipeline of hydraulic system is solved. An analysis of the regulating characteristics of the pipeline pressure adjusting the factors of energy saving.

## Концепція автоматизації процесу контролю технологічного стану промислових трубопровідних систем, посудин і резервуарів

The problem of construction of software maintenance and corrosion monitoring of pipeline systems, and provides automation and flow diagram of interaction modules. Using the developed software is indicated mode of technological schemes. The means to identify and diagnose equipment resource including corrosion.