Optimal Integral Super-Twisting Sliding-Mode Control for high efficiency of Pumping Systems

Improving High Efficiency and Reliability of Pump Systems using Optimal Fractional-order Integral Sliding-Mode Control Strategy

“…The induction machine losses are classified as clearly, explained in the IEEE Standard into: stator joule losses; rotor Joule losses; friction, windage losses; core losses; stray-load losses; and brush contact losses (in wound rotor machines) [1], [2], [3], [4], [5]. In terms of d-and q-axis current components on the basis of [5], the total power losses of the induction machine can be described as follows…”

“…2) Mathematical Modelling of Pump: The polynomial approximation of a centrifugal pump, able to predict the pressure differential H created by impeller rotating speed [1], [2], [4], [5], [6], [7], [8].…”

“…The mathematical modeling (linear and the logarithmic characteristic) of the control valve is determined by using the simplifying hypothesis, which considers that the pipe drop pressure ∆P p is not modified and the value of the energy balance of the hydraulic system is P 0 = P out + ∆P v + ∆P p , where P 0 is the pump output pressure, ∆P v is the drop pressure of the control valve, ∆P p is the drop pressure of the pipe and P out is the pressure of the exit of the pipe. In this case, the flow through the flow control valve can be written as [1], [2], [4], [5], [6], [7], [8]…”

“…The electrical energy of a motor-pump system is converted to the pressure energy of a liquid coming from the volute casing. During this transfer, some amount of this energy is lost in an unusable form, occurring in the motor windings, motor bearing frame, stuffing boxes, mechanical seals, friction, throttle valve, and other losses in the volute, pipeline, and impeller, [1], [2]. Therefore, many researchers focused on the energy efficiency savings of pump systems.…”

Optimal Recursive Terminal Sliding-Mode Control Using Super-Twisting Algorithm for Improving High Efficiency and Reliability of Pump Systems

“…to reducing energy consumption [1]. This system precisely are needed to meets varying demand and to limit the pumps' operating conditions to a point nearby possible to the design conditions with the purpose of high efficiency and reliability [2].…”