1. A water plant energy-saving method based on flow closed-loop control of a water supply booster pump station is characterized by comprising the following steps:

step one, setting the flow of a water supply area of a booster pump station to be 0, and counting the instantaneous flow S1 of the water plant after a tip pipe network is cut off;

step two, dividing time period H1 of S1 by starting a single variable-frequency constant-pressure water supply pump according to a water plant, starting a two-pump combined divided time period H2, starting a second two-pump combined divided time period H3, and dividing a day into N water supply zone time periods according to the standard;

step three, applying the segmented time of the step to the water inlet time segmentation of the pump station;

step four: calculating the actual total water supply quantity Stotal of the booster pump station according to experience;

step five: calculating the maximum flow of the water plant pump sets in the N water supply sections and the actual flow S1 to obtain the instantaneous water inlet flow of the pressurizing pump station section;

step six, calculating the sectional water inlet instantaneous flow rate S2 of the booster pump station according to the maximum instantaneous flow rate in the sectional section and the maximum instantaneous flow rate of the water pump of the water plant, and increasing or decreasing the instantaneous flow rate of a certain section according to S2;

and step seven, learning the step four to the step six, and adjusting the instantaneous water inlet flow of the booster pump station by adopting a PID algorithm.

2. The water plant energy saving method based on the closed-loop control of the flow of the water supply booster pump station according to the claim 1, characterized in that the calculation in the fourth step is carried out by using a knowledge graph according to experience calculation, and the knowledge graph establishes a database according to the flow and time interval data to form the knowledge graph.

3. A water plant energy-saving system based on flow closed-loop control of a water supply booster pump station is characterized by comprising the booster pump station, an adjusting tank, a water supply pump room, an adjusting water inlet valve, a flowmeter and a pump station PLC system, wherein the adjusting water inlet valve is arranged between the adjusting tank and the water supply pump room, used for controlling the flow rate of the water pump room flowing into the regulating tank, a water plant variable frequency water pump is arranged in the water pump room, the water delivery pump room is connected with the booster pump station and the user end through pipelines, a flowmeter is arranged in each pipeline and used for detecting flow data in each pipeline, and transmits the data to a pump station PLC system which respectively carries out data interaction with a booster pump station, a water delivery pump room and a regulating water inlet valve through communication devices, the PLC system of the pump station is used for controlling the booster pump station, the water supply pump room and the adjusting water inlet valve to realize the energy-saving method of the water plant based on the flow closed-loop control of the water supply booster pump station according to the claim 1 or 2.

Background

Energy-concerving and environment-protective is advocated vigorously in present country, energy-conservation can effectively reduce energy consumption, the extravagant scheduling problem of material, improve the utilization efficiency of energy material, at the in-process that the water works supplied water, realize supplying water through the variable frequency water pump, nevertheless there is water waste and the variable frequency water pump can't in time make the adjustment and cause the problem that the electric quantity of sending water consumes too big among the water supply process, the power of relying on control system to control the variable frequency water pump usually when handling this kind of problem of water works at present, but control technology is unreasonable, make the too big problem of electric quantity of sending water consumption can't obtain solving, and unable high efficiency operation water works, very big increase the energy consumption of water works.

Disclosure of Invention

In order to solve at least or partially the problems, a water plant energy-saving method and system based on flow closed-loop control of a water supply booster pump station are provided.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention relates to a water plant energy-saving method based on flow closed-loop control of a water supply booster pump station, which comprises the following steps:

step one, setting the flow of a water supply area of a booster pump station to be 0, and counting the instantaneous flow S1 of the water plant after a tip pipe network is cut off;

step two, dividing time period H1 of S1 by starting a single variable-frequency constant-pressure water supply pump according to a water plant, starting a two-pump combined divided time period H2, starting a second two-pump combined divided time period H3, and dividing a day into N water supply zone time periods according to the standard;

step three, applying the segmented time of the step to the water inlet time segmentation of the pump station;

step four: calculating the actual total water supply quantity Stotal of the booster pump station according to experience;

step five: calculating the maximum flow of the water plant pump sets in the N water supply sections and the actual flow S1 to obtain the instantaneous water inlet flow of the pressurizing pump station section;

step six, calculating the sectional water inlet instantaneous flow rate S2 of the booster pump station according to the maximum instantaneous flow rate in the sectional section and the maximum instantaneous flow rate of the water pump of the water plant, and increasing or decreasing the instantaneous flow rate of a certain section according to S2;

and step seven, learning the step four to the step six, and adjusting the instantaneous water inlet flow of the booster pump station by adopting a PID algorithm.

As a preferred technical solution of the present invention, in the fourth step, the calculation is performed by using a knowledge graph according to experience calculation, and the knowledge graph establishes a database according to data of flow and time intervals to form the knowledge graph.

The invention also provides a water plant energy-saving system based on the flow closed-loop control of the water supply booster pump station, which comprises the booster pump station, an adjusting tank, a water supply pump room, an adjusting water inlet valve, a flowmeter and a pump station PLC system, wherein the adjusting water inlet valve is arranged between the adjusting tank and the water supply pump room, used for controlling the flow rate of the water pump room flowing into the regulating tank, a water plant variable frequency water pump is arranged in the water pump room, the water delivery pump room is connected with the booster pump station and the user end through pipelines, a flowmeter is arranged in each pipeline and used for detecting flow data in each pipeline, and transmits the data to a pump station PLC system which respectively carries out data interaction with a booster pump station, a water delivery pump room and a regulating water inlet valve through communication devices, the pump station PLC system is used for controlling the booster pump station, the water supply pump room and the water inlet valve to realize the water plant energy-saving method based on the flow closed-loop control of the water supply booster pump station.

Compared with the prior art, the invention has the following beneficial effects:

the invention reduces the action of the water inlet regulating valve of the pump station, simultaneously utilizes the water delivery quantity of the water pump of the water plant to the maximum extent, operates the water pump of the water plant with high efficiency and greatly reduces the water delivery power consumption of the water plant.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of the system architecture of the present invention;

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

In addition, if a detailed description of the known art is not necessary to show the features of the present invention, it is omitted.

Example 1

The invention provides a water plant energy-saving method based on closed-loop control of flow of a water supply booster pump station, which comprises the following steps:

step one, setting the flow of a water supply area of a booster pump station to be 0, and counting the instantaneous flow S1 of the water plant after a tip pipe network is cut off;

step two, dividing time period H1 of S1 by starting a single variable-frequency constant-pressure water supply pump according to a water plant, starting a two-pump combined divided time period H2, starting a second two-pump combined divided time period H3, and dividing a day into N water supply zone time periods according to the standard;

step three, applying the segmented time of the step to the water inlet time segmentation of the pump station;

step four: calculating the actual total water supply quantity Stotal of the booster pump station according to experience;

step five: calculating the maximum flow of the water plant pump sets in the N water supply sections and the actual flow S1 to obtain the instantaneous water inlet flow of the pressurizing pump station section;

step six, calculating the sectional water inlet instantaneous flow rate S2 of the booster pump station according to the maximum instantaneous flow rate in the sectional section and the maximum instantaneous flow rate of the water pump of the water plant, and increasing or decreasing the instantaneous flow rate of a certain section according to S2;

and step seven, learning the step four to the step six, and adjusting the instantaneous water inlet flow of the booster pump station by adopting a PID algorithm.

And in the fourth step, the knowledge graph is used for calculation according to experience, the knowledge graph establishes a database according to flow and time-interval data to form the knowledge graph, specifically, the water inlet flow of the pump station is controlled in a time-interval constant flow mode, the actual water inlet flow is controlled by detecting the actual maximum water delivery flow of the water plant in the last day, the instantaneous water inlet flow of the pressurizing pump station is calculated and adjusted in a closed-loop control mode, the closed-loop control algorithm adopts a PID algorithm, and the water delivery quantity of the water delivery pump of the water plant is utilized to the maximum extent while the action of a water inlet regulating valve of the pump station is reduced.

As shown in figure 1, the invention also provides a water plant energy-saving system based on the flow closed-loop control of the water supply booster pump station, which comprises the booster pump station, a regulating reservoir, a water supply pump room, a regulating water inlet valve, a flowmeter and a pump station PLC system, wherein the regulating water inlet valve is arranged between the regulating reservoir and the water supply pump room, used for controlling the flow rate of the water pump room flowing into the regulating reservoir, a water plant variable frequency water pump is arranged in the water pump room, the water pump room is connected with the booster pump station and the user end through pipelines, a flowmeter is arranged in the pipeline and used for detecting the flow rate data in the pipeline, and transmitting data to a pump station PLC system, wherein the pump station PLC system respectively performs data interaction with the booster pump station, the water delivery pump room and the regulating water inlet valve through communication devices, and the pump station PLC system is used for controlling the booster pump station, the water delivery pump room and the regulating water inlet valve to realize the water plant energy-saving method based on the flow closed-loop control of the water supply booster pump station.

The pump station is built at the tip water supply pipe network, and the tip pipe network is cut off to the pump station water inlet, utilizes pump station water supply pump constant voltage to supply water for the tip pipe network constant voltage, and the high efficiency operation water supply pump of water works reduces water supply power consumption by a wide margin.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.