CN115330224A - Method for reducing energy consumption of pump room by optimizing control of auxiliary pump - Google Patents

Method for reducing energy consumption of pump room by optimizing control of auxiliary pump Download PDF

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CN115330224A
CN115330224A CN202210999080.0A CN202210999080A CN115330224A CN 115330224 A CN115330224 A CN 115330224A CN 202210999080 A CN202210999080 A CN 202210999080A CN 115330224 A CN115330224 A CN 115330224A
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data
pump
curve
building
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宋纲
吉翔
程晓巍
李炎
疏童
刘雅亭
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Hefei Water Group Co ltd
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Hefei Water Group Co ltd
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Abstract

The invention discloses a method for reducing energy consumption of a pump room by optimizing control of auxiliary pumps, relates to the technical field of secondary water supply, and solves the technical problems that in the prior art, the operation life of a main pump is shortened and the energy consumption is increased due to the fact that the main pump and the auxiliary pump are unreasonably switched and the main pump runs in an unreasonable area for a long time; the system comprises a data analysis module, a data acquisition module and an execution control module, wherein the data acquisition module and the execution control module are connected with the data analysis module; according to the invention, the building water supply curve is determined based on historical data and living information, the building water supply curve is analyzed to determine the characteristic operation time period, and then the switching of the main and auxiliary pumps is controlled according to the characteristic operation time period, so that the working time of the main and auxiliary pumps can be reasonably distributed, the water supply efficiency is improved, and the energy consumption is reduced; the water supply curve of the building can be checked according to actually measured water supply information, the water supply state can be adjusted in time, and the switching accuracy of the main pump and the auxiliary pump is guaranteed.

Description

Method for reducing energy consumption of pump room by optimizing control of auxiliary pump
Technical Field
The invention belongs to the field of secondary water supply, relates to an auxiliary pump optimization control technology, and particularly relates to a method for reducing energy consumption of a pump room by optimizing auxiliary pump control.
Background
As high-rise buildings are also increasing, the demand of secondary water supply systems is also increasing rapidly. The secondary water supply equipment is a core component of a pressurized water supply system of a high-rise building and is also an important component for urban energy-saving optimization, so that the secondary water supply equipment has great significance for controlling the energy consumption of the secondary water supply system in the using process.
A main pump and an auxiliary pump are usually arranged in a common secondary water supply system, the auxiliary pump is started when the secondary water supply system runs under a small load, but the condition for starting the auxiliary pump is harsh, so that the auxiliary pump only runs for a small part of time. If the auxiliary condition is not met, the auxiliary pump mode cannot be switched to, the secondary water supply system can operate in a main pump low-flow mode, the operation service life of the main pump can be shortened, and the energy consumption is increased; the traditional auxiliary mode easily causes unstable water pressure and influences water using experience; therefore, a method for optimizing the control of the auxiliary pump to reduce the energy consumption of the pump room is needed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art; therefore, the invention provides a method for reducing energy consumption of a pump room by optimizing control of auxiliary pumps, which is used for solving the technical problems that the operation life of a main pump is shortened and the energy consumption is increased due to the fact that the main pump and the auxiliary pump are unreasonably switched and the main pump runs in an unreasonable area for a long time in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a method for optimizing control of an auxiliary pump to reduce energy consumption of a pump room, including a data analysis module, and a data acquisition module and an execution control module connected thereto, where the execution control module is used to control switching of a main pump and an auxiliary pump in a secondary water supply system;
the data acquisition module acquires the living information and historical data of the building in charge of the secondary water supply system; the data analysis module determines a building water supply curve based on historical data; the check-in information comprises a check-in rate and a check-in population;
the data analysis module divides the characteristic operation time period of the main and auxiliary pumps according to the building water supply curve, and the execution control module controls the switching of the main and auxiliary pumps according to the characteristic operation time period; wherein the characteristic operation period comprises a plurality of operation periods;
the data acquisition module measures water supply information actually in the process of controlling the switching of the main pump and the auxiliary pump; the data analysis module judges whether the building water supply curve is normal or not based on the water supply information; if yes, updating is not carried out, otherwise, updating is carried out.
Preferably, the data analysis module is respectively in communication and/or electrical connection with the data acquisition module and the execution control module; the execution control module controls the secondary water supply system to operate through the controller;
the data acquisition module is respectively in communication and/or electrical connection with the intelligent terminal and the data sensors of the types; the intelligent terminal comprises a mobile phone or a computer, the plurality of types of data sensors comprise a pressure sensor and a flow sensor, and the plurality of types of data sensors are used for acquiring data of the operation process of the secondary water supply system.
Preferably, the data analysis module establishes the building water supply curve based on historical data, and includes:
extracting, by the data acquisition module, the historical data from a database; the historical data is water supply flow or water supply pressure of a plurality of unit time, and the unit time comprises one day or one week;
determining a water supply fluctuation curve corresponding to the building according to historical data; and adjusting the water supply fluctuation curve based on the living information to obtain the building water supply curve.
Preferably, the data analysis module determines water supply characteristic data based on the check-in information; wherein the water supply characteristic data comprises water supply total amount or water supply pressure; adjusting a water supply fluctuation curve based on the water supply characteristic data to obtain the building water supply curve, and the method comprises the following steps:
labeling the water supply fluctuation curve as GF (t); wherein the value range of t is the whole unit time;
acquiring water supply characteristic data corresponding to the water supply fluctuation curve, and marking the water supply characteristic data as target water supply characteristics MGT; obtaining ψ by the formula: (GF (t) + ψ) = MGT, then the building water supply curve LF (t) = GF (t) + ψ is determined.
Preferably, the data analysis module divides the building water supply curve based on the switching critical data to obtain the characteristic operation time period, and includes:
acquiring the switching critical data; the switching critical data comprises the water supply flow or the water supply pressure of a switching critical point of the main pump and the auxiliary pump;
dividing the building water supply curve based on the switching critical data to obtain the characteristic operation time period; the characteristic operation time period comprises a main pump operation time period, an auxiliary pump operation time period and an auxiliary pump pressure maintaining stop time period.
Preferably, the data analysis module sends the characteristic operation time interval to the execution control module; the execution control module controls the main pump to operate in the main pump operation period, controls the auxiliary pump to operate in the auxiliary pump operation period, and controls the auxiliary pump to stop in the auxiliary pump pressure maintaining stop period.
Preferably, in the process that the execution control module controls the switching of the main pump and the auxiliary pump, the data acquisition module acquires and acquires actually measured water supply information in real time; the actually measured water supply information comprises water supply flow or water supply pressure; and
the data analysis module judges whether the building water supply curve in unit time is normal or not according to the actually measured water supply information; if yes, continuing to control according to the building water supply curve; otherwise, control is performed according to a default mode.
Preferably, the data analysis module judges whether the building water supply curve is normal according to the actually measured water supply information, and the method includes:
obtaining the difference value between the actually measured water supply information at the switching node of the first two main and auxiliary pumps and the corresponding value of the building water supply curve, and respectively marking the difference value as CZ1 and CZ2;
obtaining a curve evaluation coefficient QPX through a formula QPX = alpha x | CZ1+ CZ2 |; when the curve evaluation coefficient is smaller than the curve evaluation threshold value, judging that the building water supply curve is normal; wherein alpha is a proportionality coefficient greater than 0.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the building water supply curve is determined based on historical data and living information, the building water supply curve is analyzed to determine the characteristic operation time period, and then the switching of the main and auxiliary pumps is controlled according to the characteristic operation time period, so that the working time of the main and auxiliary pumps can be reasonably distributed, the water supply efficiency is improved, and the energy consumption is reduced; the water supply curve of the building can be checked according to the actually measured water supply information, the water supply state can be adjusted in time, and the switching accuracy of the main pump and the auxiliary pump is guaranteed.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the working steps of the present invention;
fig. 2 is a schematic diagram of the system of the present invention.
Detailed Description
The technical solutions of the present invention will be described below clearly and completely in conjunction with the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, in a first aspect of the present invention, a method for optimizing control of an auxiliary pump to reduce energy consumption of a pump room is provided, including a data analysis module, and a data acquisition module and an execution control module connected thereto, where the execution control module is configured to control switching of a main pump and an auxiliary pump in a secondary water supply system;
the data acquisition module acquires the living information and historical data of the building in charge of the secondary water supply system; the data analysis module determines a building water supply curve based on historical data; wherein the check-in information comprises a check-in rate and a check-in population;
the data analysis module divides the characteristic operation time period of the main pump and the auxiliary pump according to the building water supply curve, and the execution control module controls the switching of the main pump and the auxiliary pump according to the characteristic operation time period; wherein the characteristic operation period comprises a plurality of operation periods;
the data acquisition module actually measures water supply information in the process of controlling the switching of the main pump and the auxiliary pump; the data analysis module judges whether the building water supply curve is normal or not based on the water supply information; if yes, the updating is not carried out, otherwise, the updating is carried out.
The secondary water supply system can start the auxiliary pump when the small load operates in the prior art, but because the setting of starting condition is comparatively harsh, the auxiliary pump can operate only in a small time, and most of time can supply water through the main pump, not only leads to the main pump to assist the switch control not accurate, can influence the life-span of main pump moreover, improves the energy consumption.
According to the invention, the building water supply curve is determined based on historical data and living information, the building water supply curve is analyzed to determine the characteristic operation time period, and then the switching of the main pump and the auxiliary pump is controlled according to the characteristic operation time period, so that the working time of the main pump and the auxiliary pump can be reasonably distributed, the water supply efficiency is improved, and the energy consumption is reduced; the water supply curve of the building can be checked according to the actually measured water supply information, the water supply state can be adjusted in time, and the switching accuracy of the main pump and the auxiliary pump is guaranteed.
The data analysis module is respectively communicated and/or electrically connected with the data acquisition module and the execution control module; the execution control module controls the secondary water supply system to operate through the controller; the data acquisition module is respectively communicated and/or electrically connected with the intelligent terminal and the data sensors of the types.
The data analysis module is mainly used for analyzing various data and performing data interaction with the data acquisition module and the execution control module; the data acquisition module is mainly used for acquiring various data and performing data interaction with the intelligent terminal and the data sensors of a plurality of types; the execution control module mainly implements specific control on the secondary water supply system.
The intelligent terminal comprises a mobile phone or a computer and provides check-in information for the data acquisition module; the plurality of types of data sensors comprise a pressure sensor, a flow sensor and the like, and are used for acquiring data of the operation process of the secondary water supply system.
The data analysis module in the application of the invention establishes a building water supply curve based on historical data, and comprises the following steps:
extracting historical data from a database through a data acquisition module; determining a water supply fluctuation curve corresponding to the building according to historical data; and adjusting the water supply fluctuation curve based on the living information to obtain the building water supply curve.
The database stores the water supply amount or water supply pressure of the building in various living states in various accumulated scenes in unit time, and data related to the water supply amount or water supply pressure is recorded and stored because the judgment is mainly based on the water supply amount or water supply pressure when the main and auxiliary pumps are controlled to switch. The unit time comprises one day or one week and the like, one unit time is the switching period of one auxiliary pump in the secondary water supply system, and the unit time can be reasonably set according to the actual situation.
And retrieving a water supply fluctuation curve corresponding to a building with a scene similar to that (similar environment, similar household structure and the like) of a target building (the building for performing main and auxiliary pump switching control). The water supply fluctuation curve can be more conveniently determined due to the similar scenes and the similar corresponding water supply laws.
After the water supply rule is determined, the water supply fluctuation curve needs to be adjusted to obtain a water supply fluctuation curve which accords with a target building, namely a building water supply curve. The data analysis module determines water supply characteristic data based on the check-in information; wherein the water supply characteristic data comprises water supply total amount or water supply pressure; adjust the water supply fluctuation curve based on the water supply characteristic data, acquire a building water supply curve, include:
marking the water supply fluctuation curve as GF (t); acquiring water supply characteristic data corresponding to a water supply fluctuation curve, and marking the data as target water supply characteristics MGT; obtaining ψ by the formula: (GF (t) + ψ) = MGT, then the building water supply curve LF (t) = GF (t) + ψ is determined.
t represents time, and the numeric area of t is the whole unit time; the total water supply amount required by the target building in unit time can be obtained according to the living information, the total water supply pressure can be determined according to the total water supply amount, and both the total water supply amount and the total water supply pressure belong to water supply characteristic data. And if the dependent variable of the water supply fluctuation curve is the water supply quantity, selecting the total water supply quantity by the water supply characteristic data. The parameter psi can be calculated and obtained through the established formula, and the fact is that the water supply fluctuation curve is translated up and down under the condition that the water supply rule in the water supply fluctuation curve is kept unchanged, so that the requirement of target characteristic data in unit time is met.
The data analysis module in the application of the invention divides the building water supply curve based on the switching critical data to obtain the characteristic operation time period, and the method comprises the following steps:
acquiring switching critical data; dividing a building water supply curve based on switching critical data to obtain a characteristic operation time period; the characteristic operation time period comprises a main pump operation time period, an auxiliary pump operation time period and an auxiliary pump pressure maintaining shutdown time period.
The switching critical data are water supply pressure or water supply quantity corresponding to the main pump and the auxiliary pump when switching is carried out, and the switching critical data are brought into a building water supply curve to be divided into multiple sections, so that the characteristic operation time period is obtained. The data analysis module sends the characteristic operation time interval to the execution control module; the execution control module controls the main pump to operate in the main pump operation period, controls the auxiliary pump to operate in the auxiliary pump operation period, and controls the auxiliary pump to stop in the auxiliary pump pressure maintaining stop period.
In the application of the invention, in the process of controlling the switching of the main pump and the auxiliary pump by the execution control module, the data acquisition module acquires and acquires actually measured water supply information in real time; the actually measured water supply information comprises water supply flow or water supply pressure; the data analysis module judges whether the building water supply curve in unit time is normal or not according to the actually measured water supply information; if yes, continuing to control according to the building water supply curve; otherwise, control is performed according to a default mode.
The historical data in the database is not necessarily matched with the target building, so that the historical data in the database needs to be updated and expanded continuously. When the building water supply curve is normal, the switching of the main pump and the auxiliary pump is continuously controlled according to the building water supply curve, otherwise, the switching is controlled according to a default mode. The default mode is a condition for switching the main pump and the auxiliary pump set by a worker according to experience.
The invention discloses a method for judging whether a building water supply curve is normal or not by a data analysis module according to actually measured water supply information, which comprises the following steps:
obtaining the difference value between the actually measured water supply information at the switching node of the first two main and auxiliary pumps and the corresponding value of the building water supply curve, and respectively marking as CZ1 and CZ2; obtaining a curve evaluation coefficient QPX by a formula QPX = α × | CZ1+ CZ2 |; and when the curve evaluation coefficient is smaller than the curve evaluation threshold value, judging that the building water supply curve is normal. The curve evaluation threshold is set according to practical experience.
The main and auxiliary pump switching and the specific work flow can refer to the following steps:
1. in the process of the operation of the auxiliary pump, if the water supply flow rate mutation is detected to be extremely small, when the condition that the auxiliary pump enters the pressure maintaining shutdown state (the actual operation frequency of the auxiliary pump is less than the auxiliary inlet pressure maintaining frequency, the current pressure is greater than the set pressure, and the inlet pressure maintaining delay time reaches the set time) is met, the secondary water supply system automatically enters the pressure maintaining shutdown state to reduce energy consumption.
2. In the process of the operation of the auxiliary pump, if the fact that the water supply flow is large is detected, the auxiliary pump cannot meet the water supply pressure, the auxiliary condition can be met (the actual operation frequency of the auxiliary pump is greater than the auxiliary output frequency, the current pressure is less than the set pressure, and the auxiliary output delay time reaches the set time), the main pump can be switched to supply water, and if the system meets the auxiliary input condition again (the actual operation frequency of the main pump is less than the auxiliary input frequency, the current pressure is greater than the set pressure, and the auxiliary input delay time reaches the set time), the auxiliary pump can be switched to operate again. And similarly, if the condition of entering the pressure maintaining shutdown is met, the system enters the pressure maintaining shutdown state again to reduce energy consumption.
3. If the auxiliary operation time period is out, the system can automatically stop the operation of the auxiliary pump and enter the operation of the main pump. And outside the auxiliary feeding time period, the secondary water supply system always runs by the main pump.
4. If the system meets the condition of entering the pressure maintaining and stopping from the main pump in the auxiliary operation time period (the frequency is less than the frequency of entering the main pump, the current pressure is greater than or equal to the deviation under the set pressure (the set pressure is minus 0.02, and the time delay of entering the pressure maintaining is met), the system can automatically enter the pressure maintaining and stopping state by the auxiliary pump to reduce the energy consumption.
5. The switching between the water pumps increases the parameter "switching delay time", can be specifically adjusted according to on-the-spot actual conditions, seamless connection when guaranteeing the water pump operation when switching, can solve the undulant problem of pipe network water pressure when switching to a certain extent.
Part of data in the formula is obtained by removing dimension and taking the value to calculate, and the formula is obtained by simulating a large amount of collected data through software and is closest to a real situation; the preset parameters and the preset threshold values in the formula are set by those skilled in the art according to actual conditions or obtained through simulation of a large amount of data.
The working principle of the invention is as follows:
the data acquisition module acquires the living information and historical data of the building in charge of the secondary water supply system; the data analysis module determines a building water supply curve based on historical data.
The data analysis module divides the characteristic operation time period of the main and auxiliary pumps according to the building water supply curve, and the execution control module controls the switching of the main and auxiliary pumps according to the characteristic operation time period.
The data acquisition module measures water supply information actually in the process of controlling the switching of the main pump and the auxiliary pump; the data analysis module judges whether the building water supply curve is normal or not based on the water supply information; if yes, the updating is not carried out, otherwise, the updating is carried out.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (8)

1. The utility model provides a method for optimizing and assisting pump control and reducing pump house energy consumption, includes data analysis module to and the data acquisition module and the execution control module that are connected with it, and the execution control module is arranged in controlling the switching of main and auxiliary pump in the secondary water supply system, its characterized in that:
the data acquisition module acquires the living information and historical data of the building in charge of the secondary water supply system; the data analysis module determines a building water supply curve based on historical data; the check-in information comprises a check-in rate and a check-in population;
the data analysis module divides the characteristic operation time period of the main and auxiliary pumps according to the building water supply curve, and the execution control module controls the switching of the main and auxiliary pumps according to the characteristic operation time period; wherein the characteristic operation period comprises a plurality of operation periods;
the data acquisition module measures water supply information actually in the process of controlling the switching of the main pump and the auxiliary pump; the data analysis module judges whether the building water supply curve is normal or not based on the water supply information; if yes, updating is not carried out, otherwise, updating is carried out.
2. The method for optimizing control of an auxiliary pump to reduce energy consumption of a pump room as claimed in claim 1, wherein the data analysis module is in communication and/or electrical connection with the data acquisition module and the execution control module respectively; the execution control module controls the secondary water supply system to operate through the controller;
the data acquisition module is respectively in communication and/or electrical connection with the intelligent terminal and the data sensors of multiple types; the intelligent terminal comprises a mobile phone or a computer, the plurality of types of data sensors comprise a pressure sensor and a flow sensor, and the plurality of types of data sensors are used for acquiring data of the operation process of the secondary water supply system.
3. The method for optimizing control of an auxiliary pump to reduce energy consumption of a pump room as claimed in claim 1 or 2, wherein the data analysis module establishes the building water supply curve based on historical data, and comprises:
extracting, by the data acquisition module, the historical data from a database; the historical data is water supply flow or water supply pressure of a plurality of unit time, and the unit time comprises one day or one week;
determining a water supply fluctuation curve corresponding to the building according to historical data; and adjusting the water supply fluctuation curve based on the living information to obtain the building water supply curve.
4. The method for optimizing control of the auxiliary pump to reduce energy consumption of the pump room as claimed in claim 3, wherein the data analysis module determines water supply characteristic data based on the immigration information; wherein the water supply characteristic data comprises water supply total amount or water supply pressure; adjusting a water supply fluctuation curve based on the water supply characteristic data to obtain the building water supply curve, comprising:
labeling the water supply fluctuation curve as GF (t); wherein the value range of t is the whole unit time;
acquiring water supply characteristic data corresponding to the water supply fluctuation curve, and marking the data as target water supply characteristics MGT; obtaining ψ by the formula { (GF (t) + ψ) = MGT, the building water supply curve LF (t) = GF (t) + ψ is determined.
5. The method for optimizing the control of the auxiliary pump to reduce the energy consumption of the pump house according to claim 4, wherein the data analysis module divides the building water supply curve based on the switching critical data to obtain the characteristic operation time period comprises:
acquiring the switching critical data; the switching critical data comprises water supply flow or water supply pressure of a switching critical point of the main pump and the auxiliary pump;
dividing the building water supply curve based on the switching critical data to obtain the characteristic operation time period; the characteristic operation time period comprises a main pump operation time period, an auxiliary pump operation time period and an auxiliary pump pressure maintaining shutdown time period.
6. The method for optimizing control of an auxiliary pump to reduce energy consumption of a pump room as claimed in claim 5, wherein the data analysis module sends a characteristic operation period to the execution control module; the execution control module controls the main pump to operate in the main pump operation period, controls the auxiliary pump to operate in the auxiliary pump operation period, and controls the auxiliary pump to stop in the auxiliary pump pressure maintaining stop period.
7. The method for optimizing control of the auxiliary pump to reduce energy consumption of the pump room as claimed in claim 6, wherein the data acquisition module acquires and obtains actually measured water supply information in real time during the process of controlling the switching of the main pump and the auxiliary pump by the execution control module; wherein, the actually measured water supply information comprises water supply flow or water supply pressure; and
the data analysis module judges whether the building water supply curve in unit time is normal or not according to the actually measured water supply information; if yes, continuing to control according to the building water supply curve; otherwise, control is performed according to a default mode.
8. The method of claim 7, wherein the data analysis module determines whether the building water supply curve is normal according to the measured water supply information, and comprises:
obtaining the difference value between the actually measured water supply information at the switching node of the first two main and auxiliary pumps and the corresponding value of the building water supply curve, and respectively marking the difference value as CZ1 and CZ2;
obtaining a curve evaluation coefficient QPX by a formula QPX = α × | CZ1+ CZ2 |; when the curve evaluation coefficient is smaller than the curve evaluation threshold value, judging that the building water supply curve is normal; wherein alpha is a proportionality coefficient greater than 0.
CN202210999080.0A 2022-08-19 2022-08-19 Method for reducing energy consumption of pump room by optimizing control of auxiliary pump Withdrawn CN115330224A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116611674A (en) * 2023-07-20 2023-08-18 中建五局第三建设有限公司 Intelligent dispatching operation method for building supply water

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116611674A (en) * 2023-07-20 2023-08-18 中建五局第三建设有限公司 Intelligent dispatching operation method for building supply water
CN116611674B (en) * 2023-07-20 2023-09-22 中建五局第三建设有限公司 Intelligent dispatching operation method for building supply water

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Application publication date: 20221111