A Model-Based Control Method for Secondary Water Supply Equipment and Its Control System

Abstract

The invention provides a secondary water supply equipment control method and system based on a model. The secondary water supply equipment control system comprises a water supply pipe network water outlet pressure detection meter, a controller, a variable-frequency governor and a pressurization water pump, wherein the water supply pipe network water outlet pressure detection meter, the controller, the variable-frequency governor and the pressurization water pump are electrically connected in sequence. The secondary water supply equipment control system further comprises a user water consumption port flow meter. The output end of the user water consumption port flow meter is electrically connected with the input end of the controller. The user water consumption port flow meter accurately calculates the water consumption quantity of a user water outlet and inputs flow data into the controller. The controller builds a water supply model according to the flow data and corresponding time, controls frequency changes of the variable-frequency governor according to the flow value at each time point in the model, and then controls the rotation speed of the pressurization water pump. The secondary water supply equipment control system realizes high-accuracy control and a higher response speed in the secondary water supply equipment control process by modeling the water supply data, saves water and electricity, better avoids overpressure of a water supply pipe network, guarantees the safety of the water supply pipe network and provides better water consumption experience for a user on the water consumption side.

Description

technical field [0001] The invention relates to secondary water supply equipment, in particular to a model-based secondary water supply equipment control method and a control system thereof. Background technique [0002] The so-called secondary water supply usually refers to the form in which units or individuals store and pressurize urban public water supply or self-built water supply, and then supply it to users or for their own use through pipelines. Therefore, secondary water supply is the only way for high-level water supply at present. options. [0003] Secondary water supply facilities are mainly set up to make up for the lack of pressure in municipal water supply pipelines and to ensure water use for people living in high-rise buildings. Compared with raw water supply, the safety and reliability of secondary water supply has always been widely concerned by citizens. Traditional secondary water supply equipment uses a single system for water supply, and its control ...

AI Technical Summary

Problems solved by technology

[0005] 1. Only when the pressure fluctuates, the controller can start to adjust the pressure, and the pressure needs to be transmitted to the end of the water supply pipe network, the hysteresis of the control is serious, and the adjustment speed is slow;

[0006] 2. Due to the hysteresis phenomenon, the controller starts to adjust the speed of the pressurized water pump only when the pressure of the water supply pipe network exceeds the set pressure for a long time (related to the length of the pipe network). On the one hand, it is easy to cause the water supply pipe network to exceed pressure, damage the water supply network; on the other hand, it also caused unnecessary power loss;

[0007] 3. It is impossible to supply water according to the needs of users, and it is easy to burst the pipe, resulting in a serious waste of water resources

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