High-efficiency cluster type water pump system with constant pressure and variable flow and operation control method

Abstract

The invention discloses a high-efficiency cluster type water pump system with constant pressure and variable flow and an operation control method. According to the high-efficiency cluster type water pump system, a water pump can be reasonably configured according to the constant pressure and water consumption continuous change rule of industrial and mining enterprises. The high-efficiency cluster type water pump system comprises a plurality of water pumps, a full-voltage bus, two frequency converting buses, two frequency converters and a plurality of normally-opened alternating current contactors, wherein one water pump is a speed regulating pump and other water pumps are constant speed pumps; each water pump is provided with a driving motor; the driving motors are divided into a group I and a group II; each driving motor in two groups is connected with the full-voltage bus, a frequency converting bus I and a frequency converting bus II through contacts of the two alternating current contactors; a frequency converter I and a frequency converter II are respectively connected between the full-voltage bus and the frequency converting bus II as between the frequency converting bus I and the frequency converting bus II through contacts of another two alternating current contactors; and one residual contact of the alternating current contactor is connected between the two frequency converting buses. The control process comprises a start process of the water pumps, the speed regulating operation process of a variable speed pump, a flexible switching process of the water pumps and the speed regulating operation process of the variable speed pump after the flexible switching process is ended.

Description

technical field [0001] The invention relates to a high-efficiency cluster water pump system with constant pressure and variable flow in a water supply system and an operation control method. More specifically, according to the needs of industrial and mining enterprises for constant pressure and variable flow, rationally configure fixed-speed pumps, variable-speed pumps and frequency converters and build clusters Type water pumps to ensure that each water pump is in a high-efficiency operating state under different operating conditions. Background technique [0002] At present, the water consumption of some industrial and mining enterprises varies greatly, and the traditional manual operation method is difficult to meet the water supply demand, and the phenomenon of insufficient water supply or running water often occurs, which not only causes waste of water resources, but also often causes The waste of electric energy. For complex water supply and drainage systems, relevant...

AI Technical Summary

Problems solved by technology

[0002] At present, the water consumption of some industrial and mining enterprises varies greatly, and the traditional manual operation method is difficult to meet the water supply demand, and the phenomenon of insufficient water supply or running water often occurs, which not only causes waste of water resources, but also often causes waste of electric energy

For complex water supply and drainage systems, relevant literature has disclosed a group-controlled water pump system composed of multiple pumps and multiple frequency converters. The switching mode of the pump group realizes positional control according to the wat

Images