CN106202765A - A kind of public supply mains DMA Real-time modeling set method - Google Patents
A kind of public supply mains DMA Real-time modeling set method Download PDFInfo
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Abstract
The invention discloses a kind of public supply mains DMA Real-time modeling set method.First the present invention builds DMA pipe net leakage rate and makes entrance boundary process.Secondly pipe net leakage rate is connected GIS, business revenue system and SCADA system.Then data are carried out online pretreatment.Finally carry out real-time Simulation.The present invention can intactly set up DMA real-time model, and this model can fully reflect water supply network dynamic characteristic, reduces model uncertainty, thus increases substantially simulation precision and performance of dynamic tracking.Meanwhile, in this approach based on, can progressively set up whole public supply mains real-time model, follow the tracks of and location etc. for abnormal.
Description
Technical field
The invention belongs to public supply mains field, relate to water supply network DMA (District Metering Area, solely
Vertical metering region, DMA) Real-time modeling set, specifically a kind of based on water supply network SCADA (Supervisory Control And
Data Acqusition, supervisory control and data acquisition system, SCADA) the Real-time modeling set method of online data.
Background technology
Water supply network is in large scale, and structure is complicated.Affected by user's use water change at random, manual dispatching etc., pipe network system
There is many dynamic uncertainty.Moreover, affected by nature booster, mechanical water pump fault, pollution of waterhead etc., moving of pipe network
State uncertainty further enhances.Though tradition pipe network off-line model can reflect the average operating mode of pipe network, but the operating mode that loses contact with reality is run,
Can not reflect pipe network dynamic uncertainty, not possess real-time, simulation precision is relatively low, is only used for planning and designing and planned dispatching.
Though existing minority document proposes to utilize SCADA, GIS and business revenue system, set up on-time model to improve model dynamic characteristic, but real
In matter, GIS therein and business revenue system are only used in off-line modeling stage, and the flow of SCADA system only update section partial node
Value.It is true that the change of water source water pressure fluctuations in the pipe network short time, valve state, water pump start and stop etc. to pipe network operation ripple
Dynamic impact, impact pipe network operation fluctuated much larger than node flow, if modeling process is ignored these dynamic parameters, then its
Model does not the most possess overall real-time, directly results in model accuracy the highest.
The domestic substantial Real-time modeling set application example, the most only University of Cincinnati's water supply network Real-time modeling set of there is no grinds
Study carefully group and propose EPANET-RTX Real-time modeling set Open Framework[1], this framework possesses overall real-time, but still there is problems in that
It is not connected with GIS (Geographic Information System, GIS-Geographic Information System, GIS) and business revenue system, it is impossible to reflection
Network topology, user's daily water consumption and the change of water-use model；Node water requirement is estimated the most smooth so that model exists
Bigger fitness bias；Valve state does not feeds back, it is impossible to laminating reality.
List of references:
[1]James G.Uber,DominicBoccelli,HyoungminWoo,Yuan Su,Sam
Hatchett.Real-Time Network Hydraulic Modeling:Data Transformation,Model
Calibration,and Simulation Accuracy[R].National Institute of Hometown
Security,US.October2013。
Summary of the invention
For problem above, the present invention proposes a kind of water supply network DMA Real-time modeling set method.
The inventive method detailed process is as follows:
1. build DMA pipe net leakage rate and gateway BORDER PROCESSING
For specific water supply network DMA region, build model for DMA, i.e. structure with conventional waterpower adjustment modeling technique full
The basic mass-energy conservation equation of foot microcosmic pipe network:
Mass balance equation:
∑q(i,j)+Qi=0 (1)
Energy-balance equation
Hi-Hj=hk (2)
Wherein, (i j) represents the pipeline flow between the node j being associated with node i to q；QiRepresent the node-flow of node i
Amount；HiAnd HjRepresent node i and the head of node j, hkThe pressure drop of the pipeline k between expression node i and node j.
Specifically can set up pipe net leakage rate by software auxiliary such as EPANET, WaterGEMS, and can show, operate.
Then DMA pipe net leakage rate is carried out following gateway BORDER PROCESSING:
1. outside water in-out port boundary node, a node is all added as dummy node (dummy node), by these dummy nodes
Basic water consumption initial value is set to 0, and other base attribute (such as absolute altitude etc.) is set to completely the same with water in-out port nodal community；
2. outside each entrance dummy node, interpolation reservoir, as illusory reservoir (empty reservoir), adds pipeline section, will enter, export joint
Point connects with corresponding dummy node, is connected with corresponding void reservoir by entrance dummy node, and (vial is long to be connected by preferable non-resistance pipeline
Pipeline extremely short, that caliber is very big and the coefficient of friction resistance is minimum, three parameter value reference values can be 0.00001,10000 and
0.00001)。
2. pipe net leakage rate connects GIS and business revenue system
With OPC (OLE for Process Control, for the OLE of process control) mode by pipe net leakage rate and GIS and
Business revenue system connects, and wherein, GIS data is responsible for dynamically more new model Back ground Information, and business revenue data are responsible for dynamically more new node day
Basic water consumption information.The most dynamically updating the basic water consumption of pipe net leakage rate node, specific practice is: for arbitrary node i,
It comprises r class user, every class user's number be n (i, r).
The moon water total amount D of the previous moon of accumulative business revenue system interior joint i every class user (i, r):
The moon water total amount of the m-th user of the r apoplexy due to endogenous wind during wherein d (i, r m) represents node i, the r class of node i is used
The civil water mode sequences at family is P (i, r, 1), P (i, r, 2) ..., P (i, r, L), L are water-use model sequence length value, if certain
The a length of l of Water consumption type, if l < L, then P (i, j, k)=0 (l < k < L).The day of the r class user that then can obtain node i is basic
Water requirement updated value Base (i, r):
3. pipe net leakage rate connects SCADA system
Connect SCADA system data base in ODBC mode, using SCADA online data as model running boundary condition and
State parameter.Boundary condition includes water inlet pressure and flow, outlet flow；State parameter includes cistern water level, water pump stream
Amount and rotating speed, valve pressure and flow, measurement pipeline flow, measurement point pressure etc..According to model element and SCADA data storehouse
Mapping relations obtain online time sampling sequence q1,q2,q3,…,qt。
4. online data pretreatment
The time series got, due to reasons such as instruments, just can feed back to model after needing to carry out pretreatment.Wherein locate
Reason mode includes: resampling, difference, interpolation, gliding smoothing, data conversion etc..Wherein resampling is to remove redundancy value and sampling
Time normalization, obtains data q after resampling1′,q2′,q3′,…,qt′；For aggregate-value, need the data to resampling
Carry out first-order difference；For sampling time interval T, occur needing during missing value to carry out linear interpolation；The method using gliding smoothing
Remove the noise in time series；Two-way or circulating line are measured, it is thus necessary to determine that change after the flow direction.
5. real-time Simulation
First carrying out the water requirement distribution of node, the basic water requirement making t node i is:
Wherein (i, j) represents the s kind predistribution Water Requirement Model of node i to base, and K represents the Water Requirement Model s of node
Total length, θ (s, t) represents water consumption pattern multiplier corresponding to current time t, following formula obtains:
t0Representing the operation initial time of real-time model, the pattern initial time of pst real-time model, step represents water requirement
Mode time step-length.
2. remove feedback point pattern, and boundary condition and the state parameter of current time are updated feedback point.The most right
In dummy node, water inlet dummy node water requirement size is equal to corresponding water inlet pipeline flow measurements size, and value is set to bear；Water outlet
Mouth dummy node water requirement is equal to corresponding water outlet pipe linear flow rate value, if water outlet pipe linear flow rate flows to be to flow out direction, then dummy section
Point flow is just set to, and is otherwise set to bear.
3. perform hydraulic model, and result is stored in analog result data base.When needing, can show in real time and look back.
Beneficial effects of the present invention: the present invention can intactly set up DMA real-time model, this model can fully reflect water supply
Pipe network dynamic characteristic, reduces model uncertainty, thus increases substantially simulation precision and performance of dynamic tracking.Meanwhile, with this
Based on method, can progressively set up whole public supply mains real-time model, for abnormal tracking and location etc..
Accompanying drawing explanation
Fig. 1: DMA pipe network example.
Detailed description of the invention
An example is given below, the detailed description of the invention of the present invention is described in further detail.This example object is for supplying
A small-sized DMA in grid, comprises 28 nodes, 2 reservoirs, 1 water tank, pumping plant at 1,1 air relief valve, 34 pipeline sections,
As shown in Figure 1.For purposes of illustration only, this example selects EPANET as auxiliary software, specific implementation process is as follows:
1. set up DMA pipe net leakage rate
In EPANET, draw pipe network, and ensure that pipe net leakage rate meets basic mass-energy conservation equation.Then in each outside
Add a node, as dummy node, the most respectively A1, B1, C1 and D1 by node respectively, set the basic water requirement of dummy node
Being 0, other base attribute (coordinate, absolute altitude) is corresponding with A, B, C and D identical；Secondly, outside water inlet dummy node A1, B1, respectively add
Adding reservoir, respectively a R1, R2, base attribute (coordinate) is corresponding with A, B identical；Finally, with non-resistance pipeline (pipe range, pipe
Footpath, roughness are set to 0.00001,10000 and 0.00001) connect external node and corresponding dummy node, dummy node and empty water
Storehouse, obtains DMA pipe net leakage rate.
2. pipe net leakage rate connects GIS and business revenue system
With OPC (OLE for Process Control, for the OLE of process control, OPC) mode by pipe net leakage rate with
GIS and business revenue system connect.Assume that up-to-date GIS data variation once is that DMA pipe network adds a node JNWith pipeline PN,
Known PNWith newly-increased node JNOriginal node J with in pipe networkPBeing connected, design direction is to JPFlow to node JN, and delete inside
One node JDE, this node and the pipeline P in DMADEIt is connected.Utilize EPANET to operate DMA pipe net leakage rate file, dynamically update
Data to model, concrete operations are:
1. node J is increased newlyN, the node of editor's pipe net leakage rate file, add at " JUNCTIONS " (EPANET node) end
Add the newly-increased node J of descriptionNAttribute statement, respectively: label, highly, basic water requirement and Water Requirement Model information；?
" COORDINATES " (EPANET coordinate) adds at end newly-increased node JNCoordinate attributes, be label, X-coordinate, Y respectively
Coordinate information；
2. deletion of node JDE, in " JUNCTIONS " part, retrieve exclusive node label " JDE" and delete this node, with
Sample, at " COORDINATES " part, retrieval deletion of node label " JDE”；In " PIPES " (EPANET pipeline section), retrieval is unique
Pipeline section label " PDE " is expert at, and deletion is changed one's profession；
3. pipeline P is increased newlyN, at " PIPES " end, add the attribute statement describing newly-increased pipeline section, be label respectively, rise
Beginning node, terminal node, the length of pipeline, diameter, roughness, loss coefficient and state parameter.Wherein, according to design direction,
Start node and terminal node are at J respectivelyPAnd JN；
The above-mentioned operational approach to GIS data variation is only used as simple examples, for other such as elements such as reservoir, water tank
The dynamic renewal of information and the such as artificial intelligence such as " option " and " time ", method is similar, describes the most one by one.
Business revenue system dynamics is used to update the basic water requirement of pipe net leakage rate node,
Update 28 nodal basis water requirements the most altogether.Here illustrate more new node C, remaining node updating method and this type of
Seemingly: node C comprises the water consumption information of 3 kinds of users altogether, user's number of this 3 class user is respectively n (C, 1), n (C, 2) and n
(C,3).3 kinds of water-use model that 3 class users are corresponding, water-use model sequence once amounts to 96 times for every 15 minutes for one day 24 hours, the
The water-use model sequence table of α class user is shown as P (C, α, 1), P (C, α, 2) ..., P (C, α, 96), 0 < α < 3.
According to water meter record, this month total water consumption of α class user is:
The α class basic water consumption updated value of node C is:
3. pipe net leakage rate connects SCADA system
Online time series to be sampled includes: the pressure (for DMA, be the downstream pressure of inlet valve) of reservoir,
Flow out flow；The water level of water tank, flows out flow；The operation time of water pump, rotating speed, and flow out flow etc.；Before the valve of valve, after valve
Pressure (the most only considers air relief valve), valve state；Pipeline, boundary survey pipeline flow and state, middle measurement pipeline state；
Measure the water requirement of node.
Determine the Remote SCADA label of following sampling time sequence:
Reservoir A, pressure p before and after BA1, pA2And pB1, pB2And flow out flow fAAnd fB；
The water level l of water tanktankAnd flow out flow ftank；
Water pump operation time tpump, rotating speed vpump, pumping plant flow out flow fpump；
The forward and backward pressure p of valvev1And pv2And valve state sv；
Boundary survey pipeline L1, L2, L3, L4 flow: fL1、fL2、fL3、fL4；
Middle measurement pipeline P1, P2State sp1And sp2；
Middle measurement node J1, J2Water consumption fJ1And fJ2。
4. online data pretreatment
To pA1、pA2、pB1、pB2、fA、fB、ltank、ftank、tpump、vpump、pv1、pv2、fL1、fL2、fL3、fL4、sp1、sp2、fJ1、
fJ2Time series carries out resampling；
Reservoir A, B are flowed out integrated flow fA、fB, water tank flow out integrated flow ftank, water pump operation time tpumpWith accumulative
Flow fpumpAnd the integrated flow f of boundary survey pipelineL1、fL2、fL3、fL4Linear differential.
To except remaining time series of pipeline and water pump state carries out linear interpolation and moves flat to data after interpolation
Sliding denoising.
In pipe network, pipeline L3 relates to bidirectional traffics, and measured value comprises bidirectional measurement component, flows out and flow into the measurement of DMA
Value is respectively f1And f2, then pipeline flow value is f1-f2If the L3 design direction of pipeline is outwards for pros by DMA in model for DMA
To (if pipeline flow value is that negative indication is contrary with design direction).
5. real-time Simulation
1. the water requirement of all unmeasured nodes is updated, with node JEAs a example by, it is known that JEComprise 3 class Water Requirement Models, 3 classes
Corresponding three the son basic water requirement base (J of patternE, 1), base (JE, 2) and base (JE, 3), corresponding 3 water consumption multiplier sequences
It is classified as θ (1,1), θ (1,2) ..., θ (1,96), θ (2,1), θ (2,2) ..., θ (2,96) and θ (3,1), θ (3,2) ..., θ (3
96), comprise 96 multipliers in 24 hours, within the most every 15 minutes, update a multiplier.Then t node JEBasic water requirement be:
2. remove feedback point pattern, use the functions such as ENsetcontrol and ENsettimeparam real in EPANET
Existing, and use ENsetnodevalue function to update feedback point boundary condition and the state parameter of current time.The most right
In dummy node, water inlet dummy node water requirement size is equal to corresponding water inlet pipeline flow measurements size, and value is set to bear；Water outlet
Mouth dummy node water requirement is equal to corresponding water outlet pipe linear flow rate value, if water outlet pipe linear flow rate flows to be to flow out direction, then dummy section
Point flow is just set to, and is otherwise set to bear.
3. call EPANET computing engines, perform hydraulic model, and result is stored in analog result data base.When needing,
Can show in real time and look back.
Claims (1)
1. a public supply mains DMA Real-time modeling set method, it is characterised in that the method comprises the following steps:
Step 1. builds DMA pipe net leakage rate and gateway BORDER PROCESSING；
For selected water supply network DMA region, build model for DMA, i.e. structure with conventional waterpower adjustment modeling technique and meet
The basic mass-energy conservation equation of microcosmic pipe network:
Mass balance equation:
∑q(i,j)+Qi=0 (1)
Energy-balance equation
Hi-Hj=hk (2)
Wherein, (i j) represents the pipeline flow between the node j being associated with node i to q；QiRepresent the node flow of node i；Hi
And HjRepresent node i and the head of node j, hkThe pressure drop of the pipeline k between expression node i and node j；
DMA pipe net leakage rate is carried out following gateway BORDER PROCESSING:
1. outside water in-out port boundary node, a node is all added as dummy node, by initial for basic for these dummy nodes water consumption
Value is set to 0, and other base attribute is set to completely the same with water in-out port nodal community；
2. outside each entrance dummy node, add reservoir as empty reservoir, add pipeline section, will enter, Egress node and corresponding dummy node
Connect, entrance dummy node is connected with corresponding void reservoir, be connected by preferable non-resistance pipeline；
Step 2. pipe net leakage rate connects GIS and business revenue system
Being connected with GIS and business revenue system by pipe net leakage rate in OPC mode, wherein, GIS data is responsible for dynamically more new model basis letter
Breath, business revenue data are responsible for dynamically more new node day basic water consumption information；The most dynamically update pipe net leakage rate node and substantially use water
Amount, specifically: for arbitrary node i, it comprises r class user, every class user's number be n (i, r)；
The moon water total amount D of the previous moon of accumulative business revenue system interior joint i every class user (i, j):
The moon water total amount of the m-th user of the r apoplexy due to endogenous wind during wherein d (i, r m) represents node i, the r class user's of node i
Civil water mode sequences is P (i, r, 1), P (i, r, 2) ..., P (i, r, L), L is water-use model sequence length value, if certain uses water
Type Length is l, if l < L, then P (i, j, k)=0；Then the day basic water requirement updated value of the r class user of node i is obtained
Base (i, r):
Step 3. pipe net leakage rate connects SCADA system
SCADA system data base is connected, using SCADA online data as the boundary condition of model running and state in ODBC mode
Parameter；Boundary condition includes water inlet pressure and flow, outlet flow；State parameter include cistern water level, pump capacity and
Rotating speed, valve pressure and flow, measurement pipeline flow, measurement point pressure；Mapping according to model element with SCADA data storehouse is closed
System obtains online time sampling sequence q1,q2,q3,…,qt；
Step 4. online data pretreatment
The time series got, due to reasons such as instruments, just can feed back to model after needing to carry out pretreatment；The wherein side of process
Formula includes: resampling, difference, interpolation, gliding smoothing, data conversion；Wherein resampling is to remove redundancy value and sampling time mark
Standardization, obtains data q after resampling1′,q2′,q3′,…,qt′；For aggregate-value, the data to resampling are needed to carry out one
Jump divides；For sampling time interval T, occur needing during missing value to carry out linear interpolation；Gliding smoothing is used to remove time series
In noise；Two-way or circulating line are measured, it is thus necessary to determine that change after the flow direction；
Step 5. real-time Simulation
First carrying out the water requirement distribution of node, the basic water requirement making t node i is:
Wherein (i, j) represents the s kind predistribution Water Requirement Model of node i to base, and K represents that the Water Requirement Model s's of node is total
Length, θ (s, t) represents water consumption pattern multiplier corresponding to current time t, following formula obtains:
t0Representing the operation initial time of real-time model, the pattern initial time of pst real-time model, step represents Water Requirement Model
Time step；
2. remove feedback point pattern, and boundary condition and the state parameter of current time are updated feedback point；Wherein for void
Node, water inlet dummy node water requirement size is equal to corresponding water inlet pipeline flow measurements size, and value is set to bear；Outlet is empty
Node water requirement is equal to corresponding water outlet pipe linear flow rate value, if water outlet pipe linear flow rate flows to be to flow out direction, then dummy node stream
Amount is just set to, and is otherwise set to bear；
3. perform hydraulic model, and result is stored in analog result data base；When needing, can show in real time and look back.
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| CN107016622A (en) * | 2017-03-22 | 2017-08-04 | 浙江大学 | It is a kind of containing public supply mains node water requirement inversion method of the large user with water information |
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