CN103422539B - Secondary water supply booster pump station energy saving method based on network large closed loop control system - Google Patents
Secondary water supply booster pump station energy saving method based on network large closed loop control system Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 claims abstract description 11
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Abstract
The invention discloses a secondary water supply booster pump station energy saving method based on a network large closed loop control system, and belongs to the technical field of information. The method includes the steps of selecting three unfavorable points by reasonably selecting water supply area pressure unfavorable points as feedback of closed loop control and taking system redundancy into consideration, enabling one of the three unfavorable points to participate in the closed loop control feedback, and enabling the other two of the unfavorable points to be used for auxiliary monitoring, wherein unfavorable points need to be selected again to participate in the closed loop control when the pressure values of the unfavorable points are lower than a pressure control value and exceed a certain set threshold value. When wireless network faults occur and data are lost, unfavorable points also need to be selected again to participate in the closed loop control. The PID algorithm is adopted for the whole closed loop control algorithm. Through the method, a user can conduct energy conservation transformation on a secondary water supply booster pump station to obtain large economic benefit.
Description
Technical field
The invention belongs to areas of information technology, relate to a kind of secondary water-supply booster station power-economizing method of large closed-loop control system Network Based.
Background technology
The energy is developing national economy, improves the important substance basis of human living standard.Secondary water-supply booster station is the large electricity consumer in water system, and the power consumption reducing secondary pressing pump station is one of target of water undertaking's pursuit.In recent years water undertaking energy-conservation at secondary water-supply booster station, improve in efficiency of pumping station and achieved good achievement.But because water supply pumping plant amount is large, wide, fast-growth, un-reasonable phenomenon is also there is to some extent in the planning and designing, operational management etc. of pumping plant, cause the efficiency of secondary water-supply booster station on the low side, this not only wastes the energy, but also adds the burden of water undertaking.
In engineering design, the model of water pump is all selected according to the most unfavorable processing condition in engineering, namely selectes by design maximum flow and lift.And when running, user's water supply volume is all often change at random, in most time, its flow is all less than maximum stream flow.Pumping plant often adopts pumping plant to export level pressure speed governing simultaneously, can only save and change by the water yield water pump residue lift caused, it does not comprise resistance of pipe system and declines and the residue lift of generation, by the performance curve feature of centrifugal pump, along with turning down of discharge of pump, the raising all in various degree of its lift, so supply-water pump works under being often in the superfluous state of lift, this part superfluous lift just causes unnecessary energy dissipation.Will cause at night like this, user's water supply volume sharply reduces, and water supply network pressure raises, and causes the phenomenon of booster and damage user water appliance, too increases the leakage loss of pipe network simultaneously, waste a large amount of water source because ductwork pressure is excessive.
Summary of the invention
The invention provides a kind of secondary water-supply booster station power-economizing method of large closed-loop control system Network Based, the method is by reasonably selecting water supply areal pressure drawback as the feedback of closed-loop control, and consider system redundancy, select three drawbacks, one of them participates in closed loop feed back, two outer two as auxiliary monitoring, when drawback force value is lower than pressure control values, and when exceeding a certain setting threshold value, need to reselect drawback and participate in closed-loop control.When wireless network fault, during loss of data, also need to reselect drawback and participate in closed-loop control.Whole closed loop control algorithm adopts pid algorithm.
The technical solution used in the present invention is as follows:
A kind of secondary water-supply booster station power-economizing method of large closed-loop control system Network Based, this large closed-loop control system Network Based comprises pumping station monitoring system, frequency-variable controller, variable frequency pump, pressure transmitter and remote transmission device, and pumping station monitoring system is connected with remote transmission device by pressure transmitter; Content is as follows:
(1) the least favorable point of three pressure is set at variable frequency pump, uses wireless remote transmitting device to gather the monitor value of three pressure least favorable points, as the feedback of closed-loop control system.Determine that the principle of pressure least favorable point is: away from booster station main pipeline network end and or water supply region main pipeline network eminence, the demand meeting user's water will be considered simultaneously.Consider the reliability of wireless transmission method, suitable redundancy should be carried out to feedback.The water use peak period, three drawback force value should be basically identical, and three some positions should be scattered in pumping plant water supply region.
(2) by comparing the force value of three drawbacks when water use peak, determine the pressure control values of drawback, this value is selected to be equal to or greater than the force value of drawback when water use peak, and select one of them drawback as the feedback of whole closed loop, system monitors the pressure change of other two drawbacks simultaneously, guarantees that the force value of these two points is on controlling value.A threshold value is set in monitoring system, when occur pressure control values deduct drawback force value be greater than this threshold value time, reselect the less drawback of pressure and participate in closed-loop control, pressure control values is constant.When the drawback of previous participation closed-loop control is due to wireless transmission fault, during loss of data, also need to reselect the drawback participating in closed-loop control, system of selection is the same.
Suppose that current drawback has three: X1, X2, X3, drawback switching threshold is △, and drawback pressure control values is X; If the current drawback participating in controlling is X1, in time feed back next time, during the value≤△ of the value – X2 of X, the drawback participating in control just transfers X2 to, otherwise is still X1.
Whole Closed-loop pressure control algorithm adopts pid control algorithm.Consider water supply security, when closed-loop control was lost efficacy, namely feed back when cannot obtain for a long time at the appointed time, control mode switching to outlet constant pressure control system, to ensure safety water supply.
Accompanying drawing explanation
Accompanying drawing is the structural representation of large closed-loop control system Network Based.
Detailed description of the invention
Now be described for certain pumping plant.This pumping plant is regional booster station, pump power 45KW, and average day supplies water about 2000 cubic metres.Pumping plant adopts non-negative-pressure variable frequency water supply facilities, adopts pumping plant to export Isobarically Control before transformation.Specific implementation process is as follows:
(1) the selection of pumping plant water supply areal pressure drawback
Drawback is selected by theory, after test through reality, determine the feed back input of three place's pressure drawbacks as closed-loop system, Shi Mengtai primary school, Li Shan gardens, magnificent pot-stewed chicken of a specified duration respectively, the pressure range of Meng Tai primary school is 0.14Mpa to 0.17Mpa, the pressure range in Li Shan gardens is 0.142Mpa to 0.18Mpa, and the pressure range of magnificent pot-stewed chicken of a specified duration is 0.141Mpa to 0.16Mpa.
(2) install the core software system-pumping station monitoring system of network large closed-loop control, setting drawback changes difference into 0.005Mpa, and drawback pressure control values is 0.145Mpa.
(3) wireless remote transmitting device is installed, uses RDS800 here, drawback pressure is uploaded to pumping station monitoring system by wireless remote transmission mode, upload and be set to 1 minute.
(4) generally use cable network between pumping station monitoring system and frequency-variable controller, the reliability of control section can be increased like this.
(5) whole system carries out commissioning test.
Power savings before and after table 1 System Implementation
| Month | Implement the previous moon | Implement latter one month | Power saving rate |
| Water supply volume (m3) | 48797 | 42391 | ? |
| Power consumption (kwh) | 9000 | 6000 | ? |
| Water power ratio (kwh/m3) | 0.18 | 0.14 | 22.2% |
In addition, transform minimum discharge between eve and be 32.928 cubes ms/h, transformation minimum discharge at rear night is 29.269 cubes ms/h, water saving: 32.928-29.269=3.659 cube m/h.
As from the foregoing, by the enforcement of this inventive method, secondary water-supply booster station energy-saving effect is comparatively obvious, be in particular in economize on electricity 22.2%, economize on water 3.659 cubes ms/h, the overall operation pressure of pipe network obtains decline simultaneously, when ensureing user's water demand, reduce pipe explosion accident odds, thus the water supply that ensures safety.
Claims (1)
1. the secondary water-supply booster station power-economizing method of a large closed-loop control system Network Based, it is characterized in that, this large closed-loop control system Network Based comprises pumping station monitoring system, frequency-variable controller, variable frequency pump, pressure transmitter and remote transmission device, and pumping station monitoring system is connected with remote transmission device by pressure transmitter; Detailed process is as follows:
(1) the least favorable point of three pressure is set at variable frequency pump, uses wireless remote transmitting device to gather the monitor value of three pressure least favorable points, as the feedback of closed-loop control system; Determine that the principle of pressure least favorable point is: away from booster station main pipeline network end and or water supply region main pipeline network eminence, the demand meeting user's water will be considered simultaneously;
(2) by comparing the force value of three drawbacks when water use peak, determine the pressure control values of drawback, this value is selected to be equal to or greater than the force value of drawback when water use peak, and select one of them drawback as the feedback of whole closed loop, system monitors the pressure change of other two drawbacks simultaneously, guarantees that the force value of these two points is on controlling value; A threshold value is set in monitoring system, when occur pressure control values deduct drawback force value be greater than this threshold value time, reselect the less drawback of pressure and participate in closed-loop control, pressure control values is constant; When the drawback of previous participation closed-loop control is due to wireless transmission fault, during loss of data, also need to reselect the drawback participating in closed-loop control; Whole closed loop control algorithm adopts pid algorithm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105155621A (en) * | 2015-09-24 | 2015-12-16 | 扬州大学 | Construction method and application for transforming single-purpose pump station into multi-purpose pump station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103696456A (en) * | 2014-01-02 | 2014-04-02 | 上海上源泵业制造有限公司 | Internet-of-things signal transmission based frequency-variable constant-pressure water supply system and frequency-variable constant-pressure water supply method |
| CN106704163A (en) * | 2017-01-13 | 2017-05-24 | 湖南集森节能环保科技有限公司 | Water pump frequency conversion speed regulation control method, device and system |
| CN108337310A (en) * | 2018-02-02 | 2018-07-27 | 武汉远众科技有限公司 | A kind of secondary water-supply Distribution Algorithm based on big data |
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| JPH10195939A (en) * | 1997-01-16 | 1998-07-28 | Teraru Kyokuto:Kk | Water supply equipment to prevent rotting of water |
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| CN101220605A (en) * | 2008-01-24 | 2008-07-16 | 王家辉 | Automatic relay water supply equipment control system for super high-rise and control method |
| CN101982620A (en) * | 2010-10-21 | 2011-03-02 | 中国市政工程东北设计研究总院 | Energy-saving control method for water supply project |
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| CN105155621A (en) * | 2015-09-24 | 2015-12-16 | 扬州大学 | Construction method and application for transforming single-purpose pump station into multi-purpose pump station |
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Effective date of registration: 20220803 Address after: 116085 Aerospace Building, No. 31 Xinda Street, High-tech Zone, Dalian City, Liaoning Province Patentee after: DALIAN LAILIBAI INFORMATION TECHNOLOGY CO.,LTD. Address before: 116023 Jiachuang Building, No. 512 Huangpu Road, Dalian City, Liaoning Province Patentee before: DALIAN LAILIBAI INFORMATION TECHNOLOGY Co.,Ltd. |
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