CN108049453A - A kind of south water to north water transfer system Water Resources Allocation device - Google Patents
A kind of south water to north water transfer system Water Resources Allocation device Download PDFInfo
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- CN108049453A CN108049453A CN201711043365.2A CN201711043365A CN108049453A CN 108049453 A CN108049453 A CN 108049453A CN 201711043365 A CN201711043365 A CN 201711043365A CN 108049453 A CN108049453 A CN 108049453A
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- water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
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Abstract
The invention discloses a kind of south water to north water transfer system Water Resources Allocation device, including level control switch for water, water inlet, lake cistern, total water pump, fluid level transmitter, level-one water pump, intake area, pumping plant cistern, level-one pumping plant, photographic device, PLC controller, secondary pumping station, three stage pump station, N grades of pumping plants, interchanger, A.C. contactor, frequency converter, total monitoring device and SLC controllers.The present invention, for regimen condition, distributes each cascade pumping station planning rationally according to each section；Lake cistern is designed to optimal storage capacity, flood limit can be successfully managed, it is internally provided with level control switch for water, less than this water level, stop the outside water transfer of water storage in lake, it is preferential to ensure local watercourse benefit, ensure that the existing watercourse benefit in each section is not damaged, rational to calculate and control water that the water supply fraction of life, industry, urban ecological environment and water-use for navigation is made to reach 97%, agricultural water fraction reaches 95%~75%.
Description
Technical field
The present invention relates to a kind of Water Resources Allocation device and collocation methods, are specially a kind of south water to north water transfer system water money
Source configuration device belongs to water resource applied technical field.
Background technology
The south water to north refers to Yangtze river basin water resource from its upstream, middle reaches, downstream, with reference to Chinese territory region characteristic,
Fen Dong, in, western three lines transfer part and send to North China and Huai-Hai Plain and Water Resource in Northwest shortage area, large step pump stations
It is the heart of project of South-to-North water diversion, except reasonably designing, in addition to type selecting, construction and installation, the monitoring management and water resource of pumping plant
Configuration be to ensure that water transfer is reliable, reduce water-transferring cost, saving in water resource and occupy critically important status.
Water Resources Allocation is the project of a multigoal and multistage, and the optimization in each stage has reasonable utilize of water resource
Important role, the regulation optimized is not implemented in terms of existing Water Resources Allocation, destroys the existing watercourse benefit in each section,
There are significant limitation, and traditional Water Resources Allocation mode cannot meet life, industry, urban ecological environment and shipping
With the water supply of water, and it is of high cost.Therefore, a kind of south water to north water transfer system Water Resources Allocation device is proposed regarding to the issue above
And collocation method.
The content of the invention
The purpose of the present invention is that solve the above-mentioned problems and provides a kind of south water to north water transfer system water resource and match somebody with somebody
Put device.
The present invention is achieved through the following technical solutions above-mentioned purpose, a kind of south water to north water transfer system Water Resources Allocation dress
Put, including water inlet, lake cistern, total water pump, intake area, level-one pumping plant, secondary pumping station, three stage pump station, N grades of pumping plants,
SLC controllers and total monitoring device, the lake cistern connects water inlet, and lake cistern is internally provided with water level control and opens
It closes and total water pump；Total water pump connection frequency converter and A.C. contactor, and frequency converter connection SLC controls
Device processed and total monitoring device；Total water pump connection level-one pumping plant, and level-one pumping plant is internally provided with fluid level transmitter, pumping plant stores
Pond and level-one water pump；The level-one pumping plant top is equipped with photographic device, and level-one pumping plant connection intake area；The primary pump
Stand one end connection secondary pumping station, and secondary pumping station one end connection three stage pump station；N grades of pumping plants of the three stage pump station connection, described one
Grade pumping plant connects interchanger by PLC controller.
Preferably, the secondary pumping station, three stage pump station, N grade pumping plant are identical with the structure of the level-one pumping plant, and described two
Grade pumping plant, three stage pump station, N grades of pumping plants are connected interchanger with the level-one pumping plant by the PLC controller.
Preferably, there are two the level control switch for water is set, and two level control switch for water are arranged in parallel in lake water storage
The bottom in pond and lake cistern water level control end.
Preferably, the fluid level transmitter is a kind of float ball type level transducer, and fluid level transmitter is controlled with the PLC
Device, interchanger are electrically connected between inside.
The beneficial effects of the invention are as follows：This kind of south water to north water transfer system Water Resources Allocation device, according to each section for
Regimen condition distributes each cascade pumping station planning rationally；Lake cistern is designed to optimal storage capacity, can successfully manage flood limit, internal
Equipped with level control switch for water, less than this water level, stop the outside water transfer of water storage in lake, it is preferential to ensure local watercourse benefit, ensure
Each existing watercourse benefit in section is not damaged, rational to calculate and water is controlled to make life, industry, urban ecological environment and shipping
Reach 97% with the water supply fraction of water, agricultural water fraction reaches 95%~75%；Good monitoring system is additionally provided with,
It realizes remote monitoring and processing, has good economic benefit and social benefit, be suitble to promote the use of.
Description of the drawings
Fig. 1 is overall structure diagram of the present invention.
In figure：1st, level control switch for water, 2, water inlet, 3, lake cistern, 4, total water pump, 5, fluid level transmitter, 6,
Level-one water pump, 7, intake area, 8, pumping plant cistern, 9, level-one pumping plant, 10, photographic device, 11, PLC controller, 12, two level
Pumping plant, 13, three stage pump station, 14, N grades of pumping plants, 15, interchanger, 16, A.C. contactor, 17, frequency converter, 18, total monitoring
Device, 19, SLC controllers.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
Refering to Figure 1, a kind of south water to north water transfer system Water Resources Allocation device, including water inlet 2, lake water storage
Pond 3, total water pump 4, intake area 7, level-one pumping plant 9, secondary pumping station 12, three stage pump station 13, N grades of pumping plants 14,19 and of SLC controllers
Total monitoring device 18, lake cistern 3 connect water inlet 2, cistern 3 internal water in lake can be supplemented, lake cistern 3
Level control switch for water 1 and total water pump 4 are internally provided with, there are two level control switch for water 1 is set, is arranged on 3 bottom of lake cistern
On the horizontal line at defined water level control end, level control switch for water 1 can connect electricity with A.C. contactor 16, total water pump 4, water
Road makes total water pump 4 work constantly to the offer of intake area 7 water, when the water surface is less than defined water level control end, without WATER AS FLOW MEDIUM
Then circuit disconnects total water pump 4 and is stopped；Total water pump 4 connects frequency converter 17 and A.C. contactor 16, becomes frequency modulation
Speed variator 17 connects SLC controllers 19 and total monitoring device 18, it can be achieved that long-range monitoring and operation；Equipped with multi stage pumping station, always
Water pump 4 connects level-one pumping plant 9, and level-one pumping plant 9 is internally provided with fluid level transmitter 5 and level-one water pump 6；9 top of level-one pumping plant
Equipped with photographic device 10, level-one pumping plant 9 connects 7 secondary pumping station 12 of intake area, and level-one water pump 6 will be inside pumping plant cistern 8
Water is supplied to intake area 7 and is transported to；9 one end of level-one pumping plant connects secondary pumping station 12,12 one end of secondary pumping station connection triplex
Stand 13；Three stage pump station 13 connects N grades of pumping plants 14, and level-one pumping plant 9 connects interchanger 15 by PLC controller 11.
Wherein, secondary pumping station 12, three stage pump station 13, N grades of pumping plants 14 are identical with the structure of level-one pumping plant 9, and secondary pumping station
12nd, three stage pump station 13, N grade pumping plant 14 is connected interchanger 15 with level-one pumping plant 9 by PLC controller 11, realizes each pumping plant
Monitoring and multiple intake areas 7 by water；There are two level control switch for water 1 is set, and two level control switch for water 1 are arranged in parallel in
The 3 water level control end of bottom and lake cistern of lake cistern 3 realizes water transfer control water level, less than this water level, stops lake
The interior outside water transfer of water storage；Fluid level transmitter 5 is a kind of float ball type level transducer 5, and fluid level transmitter 5 and PLC controller 11,
Interchanger is electrically connected between 15 inside, realizes the water level monitoring of pumping plants at different levels.
Embodiment one：
When this kind of water transfer Water Resources Allocation device is applied in project of South-to-North water diversion,
Its collocation method is as follows：
S01, determine object function, according to each section for regimen condition, take N as 3, with each section come in and go out scale of drawing water with it is each
The minimum object function of section water deficit；
Wherein, object function concrete form is：
In formula：
Hop count when T is total；
DitFor each section water total amount in intake area；
PitWater inventory is supplied for intake area；
QjFor each cascade pumping station scale；
S02, determine constraints, controlled including water balance constraint, the constraint of lake water storage condition and Flood Control Dispatch
Principle control；Wherein, water balance constrains：Water transfer system utilize three lake regulated flows, lake for water water balance
Equation is：
Vt+1=Vt+SIt+PIt-DIt-POt-QOt
In formula：
VtFor t period lake storages；
SI carrys out water for the section after evaporation filter loss is deducted；
PI is pumped into water for the section by pumping plant；
DI is the section water consumption；
PO extracts water out for the section by pumping plant；
QO releases water naturally for the section；
Wherein, lake water storage condition constrains：Preferentially to ensure local watercourse benefit, ensure the existing watercourse benefit in each section not
It is damaged, it is specified that lake water transfer control water level of respectively regulating and storing, less than this water level, stops the outside water transfer of water storage in lake；
Wherein, PO is determined by object function using optimization algorithm
Wherein, Flood Control Dispatch Controlling principle constrains：
VxThe storage capacity corresponding to control water level is limited for flood；
VfFor the storage capacity corresponding to normal pool level；
S03, carry out preferentially, realizing each subsystem local optimum respectively by each subsystem to confession, the big system of water transfer, lead to
The decision-making for coordinating each subsystem is crossed, linear weighted combination is carried out to each target using the method for weighting, realizes the optimization of whole system,
Linear weighted combination formula：
The south water to north is carried out by this kind of mode, makes each section actual water supply of water transfer system that need to reach engineering design guarantee
Rate requirement, i.e. the water supply fraction of life, industrial, urban ecological environment and water-use for navigation reach 97%, agricultural water fraction
To 95%~75%, greatly improve work efficiency, reduce manufacture cost.
Embodiment two：
When this kind of water transfer Water Resources Allocation device apply midget plant carry out water transfer in use,
Its collocation method is as follows：
S01, determine object function, according to each section for regimen condition, take N as 2, with each section come in and go out scale of drawing water with it is each
The minimum object function of section water deficit；
Wherein, object function concrete form is：
In formula：
Hop count when T is total；
DitFor each section water total amount in intake area；
PitWater inventory is supplied for intake area；
QjFor each cascade pumping station scale；
S02, determine constraints, controlled including water balance constraint, the constraint of lake water storage condition and Flood Control Dispatch
Principle control；Wherein, water balance constrains：Water transfer system utilize three lake regulated flows, lake for water water balance
Equation is：
Vt+1=Vt+SIt+PIt-DIt-POt-QOt
In formula：
VtFor t period lake storages；
SI carrys out water for the section after evaporation filter loss is deducted；
PI is pumped into water for the section by pumping plant；
DI is the section water consumption；
PO extracts water out for the section by pumping plant；
QO releases water naturally for the section；
Wherein, lake water storage condition constrains：Preferentially to ensure local watercourse benefit, ensure the existing watercourse benefit in each section not
It is damaged, it is specified that lake water transfer control water level of respectively regulating and storing, less than this water level, stops the outside water transfer of water storage in lake；
Wherein, PO is determined by object function using optimization algorithm.
Wherein, Flood Control Dispatch Controlling principle constrains：
VxThe storage capacity corresponding to control water level is limited for flood；
VfFor the storage capacity corresponding to normal pool level；
S03, carry out preferentially, realizing each subsystem local optimum respectively by each subsystem to confession, the big system of water transfer, lead to
The decision-making for coordinating each subsystem is crossed, linear weighted combination is carried out to each target using the method for weighting, realizes the optimization of whole system,
Linear weighted combination formula：
The transfer of plant water is carried out by this kind of mode, is greatly improved work efficiency.
Embodiment one and implement two, each device when in use, it is specified that the water level control end of lake cistern 3, by into
The mouth of a river 2 conveys water into lake cistern 3, and the water in lake cistern 3 passes through level control switch for water 1, total water pump 4, exchange
Water in contactor 16 and two level control switch for water 1 connects circuit, makes total water pump 4 that the water in lake cistern 3 is defeated
To level-one pumping plant 9, the intake area 7 of level-one pumping plant 9 utilizes water, conveys the water inside pumping plant cistern 8 and is taken by level-one
Water pump 6 is drawn into secondary pumping station 12, water source is provided to each pumping plant successively by this method, when water level is less than in lake cistern 3
During defined water level control end in level control switch for water 1, total water pump 4, A.C. contactor 16 and two level control switch for water 1
The circuit of water disconnect, total water pump 4 is stopped, until the water level of lake cistern 3 rises to water level control end, so as to real
The reasonable disposition of existing water resource.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
Using specification as an entirety, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (4)
1. a kind of south water to north water transfer system Water Resources Allocation device, including water inlet (2), lake cistern (3), total water pump
(4), intake area (7), level-one pumping plant (9), secondary pumping station (12), three stage pump station (13), N grades of pumping plants (14), SLC controllers (19)
With total monitoring device (18), it is characterised in that：Lake cistern (3) the connection water inlet (2), and in lake cistern (3)
Portion is equipped with level control switch for water (1) and total water pump (4)；Total water pump (4) connects frequency converter (17) and exchanges
Contactor (16), and frequency converter (17) connection SLC controllers (19) and total monitoring device (18)；Total water pump
(4) level-one pumping plant (9) is connected, and level-one pumping plant (9) is internally provided with fluid level transmitter (5), pumping plant cistern (8) and level-one water intaking
It pumps (6)；Level-one pumping plant (9) top is equipped with photographic device (10), and level-one pumping plant (9) connection intake area (7)；The level-one
Pumping plant (9) one end connection secondary pumping station (12), and secondary pumping station (12) one end connection three stage pump station (13)；The three stage pump station
(13) N grades of pumping plants (14) are connected, the level-one pumping plant (9) connects interchanger (15) by PLC controller (11).
2. a kind of south water to north water transfer system Water Resources Allocation device according to claim 1, it is characterised in that：Described two
Grade pumping plant (12), three stage pump station (13), N grades of pumping plants (14) are identical with the structure of the level-one pumping plant (9), and the secondary pumping station
(12), three stage pump station (13), N grades of pumping plants (14) are exchanged with the level-one pumping plant (9) by the PLC controller (11) connection
Machine (15).
3. a kind of south water to north water transfer system Water Resources Allocation device according to claim 1, it is characterised in that：The water
There are two position control switch (1) is set, and two level control switch for water (1) are arranged in parallel in the bottom and lake of lake cistern (3)
Moor cistern (3) water level control end.
4. a kind of south water to north water transfer system Water Resources Allocation device according to claim 1, it is characterised in that：The liquid
Position transmitter (5) is a kind of float ball type level transducer (5), and fluid level transmitter (5) and the PLC controller (11), is exchanged
It is electrically connected between machine (15) inside.
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| CN201711043365.2A CN108049453A (en) | 2017-10-31 | 2017-10-31 | A kind of south water to north water transfer system Water Resources Allocation device |
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| CN201711043365.2A CN108049453A (en) | 2017-10-31 | 2017-10-31 | A kind of south water to north water transfer system Water Resources Allocation device |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897023A (en) * | 2006-06-29 | 2007-01-17 | 中国海洋大学 | Water-resource information managing and planning system |
| US20110264282A1 (en) * | 2008-11-14 | 2011-10-27 | Abb Technology Ag | System and method for optimized decision-making in water supply networks and/or water supply operations |
| CN102629106A (en) * | 2012-04-11 | 2012-08-08 | 广州东芝白云自动化***有限公司 | Water supply control method and water supply control system |
| CN102902202A (en) * | 2012-09-25 | 2013-01-30 | 扬州大学 | Operation optimization method of complex parallel cascaded pump station system |
| CN103544533A (en) * | 2012-07-12 | 2014-01-29 | 上海宝信软件股份有限公司 | Diversion project water resource optimal allocation dynamic model establishing system |
| CN205116266U (en) * | 2015-09-28 | 2016-03-30 | 云南大红山管道有限公司 | Tertiary pressurization station water lift system of big pipe diameter pipeline water delivery of long distance |
| CN205475474U (en) * | 2016-01-15 | 2016-08-17 | 昆明理工大学 | Automatic water supply control system of inverter type constant voltage |
| CN106295893A (en) * | 2016-08-12 | 2017-01-04 | 扬州大学 | Fully directly mend single pumping plant list water reservoir system water resource optimal allocation method in storehouse under irrigation conditions |
| CN205894151U (en) * | 2016-08-17 | 2017-01-18 | 东风设计研究院有限公司 | Remote two -stage pressure water pump linkage control device to highland water supply |
| CN106529166A (en) * | 2016-11-04 | 2017-03-22 | 河海大学 | Method for regional water-source optimized configuration based on MAEPSO algorithm |
| CN206470562U (en) * | 2017-01-23 | 2017-09-05 | 武汉瑞科兴业科技有限公司 | A kind of multistage water pump remote control and monitoring arrangement linked system |
| CN207633408U (en) * | 2017-10-31 | 2018-07-20 | 江苏省水利勘测设计研究院有限公司 | A kind of south water to north water transfer system Water Resources Allocation device |
-
2017
- 2017-10-31 CN CN201711043365.2A patent/CN108049453A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897023A (en) * | 2006-06-29 | 2007-01-17 | 中国海洋大学 | Water-resource information managing and planning system |
| US20110264282A1 (en) * | 2008-11-14 | 2011-10-27 | Abb Technology Ag | System and method for optimized decision-making in water supply networks and/or water supply operations |
| CN102629106A (en) * | 2012-04-11 | 2012-08-08 | 广州东芝白云自动化***有限公司 | Water supply control method and water supply control system |
| CN103544533A (en) * | 2012-07-12 | 2014-01-29 | 上海宝信软件股份有限公司 | Diversion project water resource optimal allocation dynamic model establishing system |
| CN102902202A (en) * | 2012-09-25 | 2013-01-30 | 扬州大学 | Operation optimization method of complex parallel cascaded pump station system |
| CN205116266U (en) * | 2015-09-28 | 2016-03-30 | 云南大红山管道有限公司 | Tertiary pressurization station water lift system of big pipe diameter pipeline water delivery of long distance |
| CN205475474U (en) * | 2016-01-15 | 2016-08-17 | 昆明理工大学 | Automatic water supply control system of inverter type constant voltage |
| CN106295893A (en) * | 2016-08-12 | 2017-01-04 | 扬州大学 | Fully directly mend single pumping plant list water reservoir system water resource optimal allocation method in storehouse under irrigation conditions |
| CN205894151U (en) * | 2016-08-17 | 2017-01-18 | 东风设计研究院有限公司 | Remote two -stage pressure water pump linkage control device to highland water supply |
| CN106529166A (en) * | 2016-11-04 | 2017-03-22 | 河海大学 | Method for regional water-source optimized configuration based on MAEPSO algorithm |
| CN206470562U (en) * | 2017-01-23 | 2017-09-05 | 武汉瑞科兴业科技有限公司 | A kind of multistage water pump remote control and monitoring arrangement linked system |
| CN207633408U (en) * | 2017-10-31 | 2018-07-20 | 江苏省水利勘测设计研究院有限公司 | A kind of south water to north water transfer system Water Resources Allocation device |
Non-Patent Citations (3)
| Title |
|---|
| 侍翰生;程吉林;方红远;陆小伟;: "基于动态规划与模拟退火算法的河-湖-梯级泵站***水资源优化配置研究", 水利学报, no. 01, pages 91 - 96 * |
| 史振铜;程吉林;杨树滩;常本春;蒋咏;: "南水北调东线江苏段库群水资源优化调度方法研究", 灌溉排水学报, no. 04, pages 14 - 18 * |
| 闻昕: "基于改进多目标粒子群算法的南水北调东线江苏段工程联合优化调度研究", 《水资源与水工程学报》, vol. 28, no. 3, pages 1013 - 1014 * |
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