Area water network pressure closed-loop regulation system

Abstract

The invention discloses an area water network pressure closed-loop regulation system. Pressure, detected by a first detection module, of a water network node is Pm, and water outlet pressure, detectedby a second detection module, of a variable frequency pump is Pn; a control module obtains control pressure Pj according to Pm and Pn, wherein the formula of Pj is shown in the description, and Mu isa head loss coefficient from the variable frequency pump to the water network node; the control module controls output pressure of the variable frequency pump to be close to Pj; the first detection module and the second detection module read data every the time T, and when any one of the first detection module and the second detection module changes, the control module controls the output pressure of the variable frequency pump to be changed. The area water network pressure closed-loop regulation system effectively lowers the change rate of the rotation speed of the variable frequency pump, the pressure on the node can be quickly distributed to each variable frequency motor, and thus it is avoided that the rotation speed of a single variable frequency motor is too high, and the system running reliability is improved.

Description

technical field [0001] The invention relates to the technical field of water network control, in particular to a regional water network pressure closed-loop control system. Background technique [0002] The shortage of water resources and energy is an important factor restricting my country's economic development, and saving water and energy is the basic national policy for the sustainable development of my country's social economy. The United States has applied frequency conversion water-saving and energy-saving technology to systems such as translational, shaft-rotating sprinklers and pipeline irrigation since the 1990s, but it is expensive. At that time, in my country's urban and rural water supply and water pump irrigation systems, the motor operated at the rated speed and supplied water at the rated water output. When the water consumption decreased or the water consumption was low, the pressure of the pipe network was too high, and the faucets and water pipelines were ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that when the node pressure of the existing variable frequency pump machine changes greatly, the speed of the variable frequency pump machine will increase rapidly, resulting in excessive shaft power and easy failure. The purpose is to provide regional water network Pressure closed-loop control system to solve the above problems

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