Improving the quality of pump unit control systems through the use of frequency-controlled electric drive

Abstract

DOI: https://doi.org/10.32820/2079-1747-2024-33-38-50

The article discusses approaches to addressing the current scientific and technical challenge
of improving the operation quality of pump units in electric stations and industrial enterprises
through automated control. Analytical dependencies and experimental energy characteristics of
pump units are provided, establishing relationships between key parameters such as pressure,
volumetric flow rate, and control parameters such as pump rotation frequency, forming a control
model. It is established that search algorithms are the most reliable and independent method of optimization, regardless of specific control object properties, utilizing current and voltage values in
calculations. For converters with scalar control, the most acceptable energy optimization method is
power consumption minimization. Performance characteristics of centrifugal pumps under throttle
and frequency regulation are demonstrated. Additional energy savings in frequency-controlled
asynchronous motors can be achieved by developing algorithms optimizing magnetic flux.
Magnetic flux optimization allows to reduce power consumption by lowering voltage levels during
steady-state operation. It is presented that maximum energy-saving modes can be implemented
through methods such as maintaining a constant power factor, ensuring consistent slip, motor
model-based control, and utilizing search algorithms. Examples of mechanisms and processes
confirm that the use of frequency-controlled asynchronous electric drives with technological
automation systems enhances the quality of controlled processes in transient and steady states,
ensuring significant resource and energy savings.