Feedback control system of water supply pump station with in-series same pumps

Abstract

The invention relates to the field of automatic control for a pump station and particularly relates to a feedback control system of a water supply pump station with in-series same pumps. The whole feedback control system comprises programmable-logic-controller control parts with different functions, wherein a liquid-level feedback control part of a reservoir controls the openness of an outlet valve of the pump station; a pump-valve torque feedback control part controls motor-rotation torques of the pumps; a pump-pump rotating-speed control part maintains the consistent pump rotation speed of the in-series pumps; and an openness feedback control part of a safety control valve controls the instantaneous excessive water outflow of the reservoir. The feedback control system has the advantages that an automatic control system with independence and perfect functions is established, the function of integration of detection and control is realized, and the management level and operating efficiency of the water supply pump station can be improved.

Description

technical field [0001] The patent of the present invention relates to the field of automatic control, in particular to a feedback control system for feedwater pumping stations with the same pumps connected in series. Background technique [0002] The pumping station project is a water conservancy project that uses pump units and flow-through facilities to transfer and convert energy, realize water body transportation, and avoid disadvantages. With the development of industrial and agricultural production and the progress of science and technology, the pumping station project in our country has been greatly developed. The obvious characteristics of my country's pumping station construction are fast speed, many types, large scale and wide range. The pumping station is one of the effective engineering measures to solve the three major water resource problems of today, flood disaster, drought and water shortage, and water environment deterioration. They are responsible for reg...

AI Technical Summary

Problems solved by technology

[0003] Urban water supply pumping stations are the source of most urban domestic water, but some pumping stations in China are relatively backward and simple in terms of control and management. Manual measurement and reporting of water level and flow, manual start and stop, etc., and some only use simple methods such as conventional relay control, which wastes human resources and is not efficient in work and management

In addition, there is a lack of organic connection in information between the pumping station equipment, the control and management of the pumping station has not formed a regional network, and the scheduling management lacks reliable automation means

[0004] After retrieval, the patents related to the present invention include: Pump Station Electric Automation Monitoring and Control System (public number: CN202117902U), which involves a monitoring system composed of a monitoring center, a communication platform, front-end equipment, front-end control equipment and front-end measurement equipment , utilizing the monitoring system software, the alarm display has increased the safety performance and realized the function of real-time monitoring and control, but it lacks the function of automatic monitoring and regulating pump station working under different working conditions; hydraulic pump station automatic control system (CN101436076), The structure includes programmable controller PLC, frequency converter and pressure sensor. The frequency converter and pressure sensor are respectively electrically connected to programmable controller PLC. Various controls are realized through the programmable controller PLC program, which can automatically and accurately control the hydraulic oil of the hydraulic pump station. Human-machine communication facilitates the setting of working pressure, easy operation, and accurate control within 3%, but its practicability is relatively limited, and it lacks real-time monitoring functions under different working conditions

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