МАТЕМАТИЧНА МОДЕЛЬ АВТОМАТИЗОВАНОГО УПРАВЛІННЯМ ВОДОПОДАЧЕЮ НА ЗРОШУВАЛЬНІЙ СИСТЕМІ

The studies are aimed at creating a mathematical model that is used to substantiate the automated water supply (AWS) algorithms on a closed irrigation system (CIS) when applied to a pump station (PS) with a pump unit (PU) with a frequency converter (FC). The purpose of the research is to reduce the energy consumption of machine water supply at the CIS by effectively applying the FC to the emergency. Main tasks: creation of a model of automated water supply management according to the flow chart of the CIS; identification of parameters of typical model blocks based on the results of experimental studies; quality analysis of the automatic control system (ACS) of the head at the output of the PU. A mathematical model of the CIS was created as an object of dispersed control and automated control of water supply according to its block diagram using MATLAB / Simulink. The dynamic and hydraulic characteristics of the objects were obtained as a result of experimental studies carried out at the CIS using ME. Parameters of typical blocks of mathematical model – asynchronous electric motors, centrifugal pumps, latches and other blocks according to transient characteristics and functional dependences obtained experimentally are identified. The hydraulic characteristics of the closed irrigation network (CIN) were determined using the calculation and experimental method. A mathematical model of the automatic control system (ACS) of the head at the output of the PS has been developed for the analysis of transient processes of automatic regulation of water supply and optimization of the proportional-integral (PI) controller parameters.