Abstract
To develop new control algorithms for controlling slurry pumps, it is necessary to have a reliable mathematical model of their operation, convenient for computer simulation implementation. Therefore, the paper discloses a mathematical model of the joint operation of a centrifugal pump with a controlled asynchronous motor drive and a slurry pipeline. The results of transient modes computer simulation, carried out via the xcos application of the scilab software, are presented. This software is a freeware one and, therefore, available free of charge to most researchers. The paper provides an example of verification of the adequacy and performance of the proposed computer model, with the use of characteristics of the centrifugal slurry pump GrAT-225-67-3-2-2. The said model of a centrifugal pump is efficient and can be used during the study of dynamic processes in pipeline transportation systems, as well as in the synthesis of control algorithms for electric drives of pumping units.
Highlights
One of the methods for controlling the flow of slurry is to control the electric motor speed
Summarizing the above, it can be concluded that the nature of the transient processes in the electric drive model of the slurry pump corresponds to physical processes
The main values, characterizing the processes in the slurry pipeline and pumping unit vary under normal operating ranges
Summary
One of the methods for controlling the flow of slurry is to control the electric motor speed. Frequency-controlled electric motor drive can significantly reduce electric power consumption, due to the possibility of using large pumping units at low flows [1, 2]. This method has long, been used, but due to the fact, that slurry pumped in the pipeline has an unstable ratio of solid and liquid phases [3, 4], it is necessary to take into account the change in slurry concentration in the control algorithm. While maintaining the concentration constant, the operating point of characteristics of the pump and network will be in the same position with minimal deviations [5]. To develop new control algorithms for controlling slurry pumps, it is necessary to have a reliable mathematical model of their operation, convenient for computer simulation implementation
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