CN112365126B - Large-scale water diversion and regulation project scheduling method applied to reservoir containing online storage and regulation - Google Patents

Large-scale water diversion and regulation project scheduling method applied to reservoir containing online storage and regulation Download PDF

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CN112365126B
CN112365126B CN202011129374.5A CN202011129374A CN112365126B CN 112365126 B CN112365126 B CN 112365126B CN 202011129374 A CN202011129374 A CN 202011129374A CN 112365126 B CN112365126 B CN 112365126B
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吴永妍
黄会勇
吴泽宇
闫弈博
张智敏
魏凯
赵健
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Changjiang Institute of Survey Planning Design and Research Co Ltd
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Abstract

The invention discloses a large-scale water diversion and regulation project scheduling method applied to an on-line regulation and storage reservoir. The method comprises the following steps: inputting basic data; step two: calculating the water delivery loss amount of any position of the main channel; step three: calculating the water demand meeting the water delivery safety constraint condition; step four: calculating the water quantity V of the reservoir on lineinVolume of water discharged from warehouse VoutAnd the water supply amount of each water dividing door. The invention overcomes the problem of the prior art that the water demand process of the user is not matched with the water diversion process of the project; has the advantage that the water requirement of each water diversion port door can be met to the maximum extent.

Description

Large-scale water diversion and regulation project scheduling method applied to reservoir containing online storage and regulation
Technical Field
The invention relates to the field of hydraulic engineering scheduling, in particular to a large-scale water diversion and regulation engineering scheduling method applied to an on-line storage reservoir.
Background
When the project is actually operated and scheduled, because of factors such as non-uniform natural water supply process, the contradiction that the water demand of a user and the water supply amount of the project can not be matched is often faced. A scientific and reasonable scheduling method is needed to realize the time-space optimal distribution of the water supply among all users, and the comprehensive benefits of the diversion project are fully exerted.
The existing water distribution model for water dispatching directly distributes the water supply quantity according to the existing water distribution proportion or the set weight; before water quantity distribution is implemented, a water quantity distribution rule is constructed, distribution weights of all water diversion port doors are determined, and a decision process in the method is mainly based on communication negotiation; the second type is to distribute the available water supply according to the input-output benefit by considering the relevant indexes of water supply benefit, but the method is difficult to implement in the actual scheduling before the water right trading market is not established. The third kind is to adopt the water resource optimization allocation scheduling method, and realize the water distribution with the maximum water supply capacity as the constraint condition (for example, patent: a multi-agent allocation method CN 109117998). However, large diversion works often contain on-line storage reservoirs to enhance scheduling flexibility. The method does not consider the restriction regulation effect of the online storage reservoir on the water supply process. A scheduling method of a reservoir (group) and a method for jointly scheduling the reservoir and a diversion and water distribution project (such as a patent that no direct water flow in-and-out relation exists between the reservoir and the diversion and water distribution project) have certain achievements (such as a patent that a bidirectional cross-basin water supply reservoir group joint scheduling method CN109409721 and a multi-objective optimization CN109800914 suitable for water resources in coastal areas are provided), however, a large diversion and water distribution project scheduling method which is complete and can comprehensively consider engineering design operation conditions and on-line storage regulation reservoir application conditions is not provided at present, and on the basis of satisfying supply and demand balance, optimal distribution of total water diversion quantity at each water diversion gate is realized through scientific calculation, so that water demand of each water diversion gate can be satisfied to the maximum extent.
Therefore, there is a need to develop an on-line reservoir regulation method that can maximize the water demand of each water diversion port door.
Disclosure of Invention
The invention aims to provide a scheduling method applied to a large diversion and water regulation project containing an online storage reservoir, which solves the problem of supply and demand contradiction between a water demand process of a user and a water diversion available process of the project on the premise of meeting the water delivery safety of the project; the method adopts a solving technology of two-round reduction and cyclic traversal to determine the scientific and reasonable distribution process of the total water diversion quantity at each water diversion port door, so that the water requirement of each water diversion port door can be met to the maximum extent.
In order to achieve the purpose, the technical scheme of the invention is as follows: the large-scale water diversion and regulation project scheduling method applied to the reservoir containing the online storage regulation and regulation is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,
the method comprises the following steps: basic data input
Obtaining design parameters of diversion project, variable diversion volume V of project0Water demand W of water mixing and distributing portd,iOn-line regulating reservoir dispatching diagram, water level-reservoir capacity relation curve and reservoir water loss VlossWater level at the beginning of the year, natural runoff and lower drainage quantity;
step two: calculating the water delivery loss of any position of the main canal
Step three: calculating the water demand meeting the water delivery safety constraint condition
Determining a water supply guarantee sequence according to the main purpose of the diversion project; the method for calculating the water demand meeting the water delivery safety constraint condition comprises the following steps: determining a first round water quantity reduction object, determining a first round water quantity reduction coefficient upper limit, determining a design flow scale constraint condition of a water diversion port door and determining a maximum channel overflow constraint condition;
step four: calculating the water quantity V of the reservoir on lineinVolume of water discharged from warehouse VoutAnd the water supply amount of each water dividing opening door
According to Vin+Vrunoff-Vout-Ved-VlossCalculating the change delta V of the storage capacity in the period of the on-line regulating reservoir and then calculating the final storage capacity V in the period of the reservoirPowder＝VFirst stage+ Δ V, further judging the relation between the last storage capacity and the upper and lower constraint conditions of the storage capacity;
when V isPowder<VDeath by deathLet VPowder＝VDeath by deathAnd back-calculating the water quantity V discharged from the reservoirout＝Vin+Vrunoff-Ved-Vloss-VDeath by death+VFirst stageThen calculating the water supply amount of each downstream water dividing port door
Figure GDA0002864720500000031
When V isPowder>VmaxLet VPowder＝VmaxAnd obtaining the water storage quantity of the on-line storage reservoir.
In the technical scheme, the design parameters of the diversion and water regulation engineering comprise the design flow scale of each water diversion port door, the maximum flow of the channel and the total water utilization coefficient eta of the channelc。
In the above technical solution, in the second step, the method for calculating the water delivery loss at any position of the main canal specifically includes: and (3) calculating the water utilization coefficient per unit length by using an equation (2-1) according to the total water utilization coefficient of the total main channel:
ηc＝ηl(2-1)
in the formula etacCalculating the distance km from the cross section to the head of the channel for the total water utilization coefficient of the channel section, wherein eta is the water utilization coefficient of unit length, and l is the water delivery loss;
according to the water utilization coefficient eta of unit length obtained by the previous step, the water utilization coefficient eta at the section of any water diversion port door of the main trunk canal is calculated by the formula (2-1)x；
According to the obtained water utilization coefficient at any section, the net water demand W at each water diversion port doord,iCalculating the water supply quantity W required at any position of the main canald’；
Setting the total number of the diversion gate as N, and setting the position of the diversion gate where the on-line regulation and storage reservoir is located as NrThe required water supply amount W considering the water delivery loss is arranged at the section of the main canal where the ith water dividing port door is positionedd,i' is:
Figure GDA0002864720500000032
Figure GDA0002864720500000033
in the formulae (2-2) and (2-3) (. eta.)iIs the water utilization coefficient, V, at the section of the ith water dividing port door of the main canallossThe water loss of the reservoir is regulated and stored on line.
In the above technical solution, in step three, the method for determining the water volume reduction object in the first round specifically includes:
according to the main purpose of the diversion project, determining the water supply guarantee sequence as a first type water use project, a second type water use project and a third type water use project; wherein, the first type of water engineering has the highest guarantee degree;
when the average water diversion amount of the third type of water use project for many years does not exceed 1/3 in the total water diversion amount, the first round of reduction of the third type of water use project and the second type of water use project;
when the average water diversion amount of the third type of water use project for many years is larger than 1/3, the first round only reduces the third type of water use project.
In the above technical solution, in the third step, when the first round of reduction is performed on the third type of water-using project and the second type of water-using project, the first round of reduction method includes determining the upper limit of the first round of reduction coefficient, the design flow scale constraint of the water diversion gate, and the maximum excess flow constraint of the channel.
In the above technical solution, in the third step, the determining of the design flow scale constraint of the water diversion port door includes the following steps:
recording the water requirements of the first type water engineering, the second type water engineering and the third type water engineering as W respectivelyda，Wdi，Wdd；
Dividing the water demand of each water distribution port door of the total main channel line by the time duration of the facing time period to calculate the water demand of the water distribution port door, and recording the water demand of the first type water engineering, the second type water engineering and the third type water engineering as Qda、Qdi、Qdd；
Comparing the water flow rate Q required by each water distribution port door of the total main channel whole lined,iAnd design flow Qc,iRelation, when Qd,i≤Qc,iIf the constraint condition of the water diversion port door is met, entering the next constraint condition judgment; when Q isdi>Qc,iThe water flow required by the water diversion port door is reduced by adopting the following two-wheel reduction technology:
first round of reduction: the third type of water using engineering and the second type of water using engineering of the water diversion port door are reduced,the reduction coefficient alpha is less than or equal to alpha1(ii) a When alpha Qda+αQdi+Qdd≤QcIf the water quantity reduction is finished, otherwise, entering a second reduction process; wherein Q iscTo design the total flow;
and (3) second-round reduction: on the basis of the first round of reduction, various types of water of the water diversion port door are reduced by a reduction coefficient alpha 'to ensure that the alpha' alpha1Qda+α’α1Qdi+α’Qdd≤QcAnd the reduction of the water amount is finished.
In the above technical solution, in the fourth step, the position of the diversion gate at which the on-line diversion reservoir is located is Nr, and the initial reservoir water level and the reservoir capacity in the current time period are H respectivelyiAnd Vi,0Natural runoff of VrunoffThe required amount of the discharged water is VedWater loss is Vloss(ii) a Early year water level H0Limiting water diversion level H in reservoir dispatching diagramGuiding deviceLimiting the water supply level HFor supplying toLimiting the water supply reduction coefficient gamma;
when H is presenti≥HGuiding deviceThen V isin＝0，
Figure GDA0002864720500000051
When H is presenti＜HGuiding deviceFurther judging the diversion quantity V of the canal head0Relation with water supply demand
Figure GDA0002864720500000052
When in use
Figure GDA0002864720500000053
Then
Figure GDA0002864720500000054
Further judging whether to charge the reservoir according to the water storage state of the on-line regulation reservoir;
when H is presenti≤H0Then, then
Figure GDA0002864720500000055
By using canalsFirstly, introducing water to fill the warehouse; when H is presenti＞H0Then, then
Figure GDA0002864720500000056
At present, the canal head is not used for introducing water to fill the reservoir;
when in use
Figure GDA0002864720500000057
Further judging the diversion quantity V of the canal head0And the total water supply quantity required at the upstream of the on-line storage reservoir
Figure GDA0002864720500000058
Calculating the quantity of the water to be put in the reservoir according to the relationship;
when in use
Figure GDA0002864720500000059
Then
Figure GDA00028647205000000510
When in use
Figure GDA00028647205000000511
Then VinThe water supply amount of each water dividing port door at the upstream is 0
Figure GDA00028647205000000512
Further judging the relation between the water level of the on-line storage water reservoir and the limited water supply level to calculate the water quantity discharged from the reservoir;
when H is presenti≥HFor supplying toThen, then
Figure GDA00028647205000000513
When H is presenti<HFor supplying toThen regulating the water quantity of the reservoir on line
Figure GDA00028647205000000514
The large diversion project is determined according to the hydraulic engineering grade division, the annual water diversion quantity is 3-10 hundred million and is large (II), and the annual water diversion quantity is more than or equal to 10 hundred million and is large (I).
The invention has the following advantages:
the scheduling method applied to the large-scale water diversion and distribution project with the on-line storage reservoir can realize the rapid and reasonable distribution of the available water supply amount, solves the problem of unmatched water supply process and user water demand process on the premise of meeting the water delivery safety, and overcomes the defects that the scheduling mode of the on-line storage reservoir is not considered, the dependence on manual decision is excessive, the practicability is insufficient, the single category water demand of the user is excessively damaged and the like in the traditional scheduling method.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Fig. 2 is a flow chart of the water two-pass reduction technique.
Fig. 3 is a diagram of an online storage reservoir scheduling in embodiment 1.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily understood by the description.
The technical invention aims to provide a large diversion and water regulation engineering scheduling method applied to an on-line regulation reservoir, which can fully utilize the on-line regulation capacity of the on-line regulation reservoir, scientifically and reasonably coordinate contradictions between the water diversion quantity, the water demand of users and the water delivery safety requirements, and ensure that the water demand of each water diversion port door can be met to the maximum extent.
Referring to FIG. 1: the large-scale water diversion and regulation project scheduling method applied to the reservoir containing the on-line regulation and storage comprises the following steps,
acquiring basic parameters of the engineering design parameters, the water diversion capacity and the water demand of a water diversion port door, and a dispatching diagram of the on-line regulating reservoir;
calculating the water delivery loss amount of any position of the main canal according to the water demand and basic parameters of the total water utilization coefficient;
according to the basic parameters, a two-wheel reduction technology is adopted to obtain the water supply quantity required to meet the water delivery safety constraint, so that the defect that the water required by a single category of a user is excessively damaged is avoided;
and according to the water supply quantity and the water diversion quantity which are determined in the previous step, determining the warehousing water quantity and the ex-warehousing water quantity of the on-line regulating and storing reservoir at different time periods and the water supply quantity at each water diversion port door by adopting a circulation traversal technology optimization decision and combining a water quantity balance basic principle.
(2) According to the dispatching method in the technical scheme, the method for calculating the water delivery loss amount of any position of the main canal is characterized by realizing the calculation of the water supply amount required by the project considering the sectional water delivery loss. The specific method comprises the following steps:
dividing the main canal into each canal section by a water diversion port door, and calculating the water utilization coefficient of unit length by using a formula 2-1 according to the length of each canal section and the designed total water utilization coefficient as a basis:
ηc＝ηl (2-1)
in the formula etacCalculating the distance km from the cross section to the head of the channel for the total water utilization coefficient of the channel section, wherein eta is the water utilization coefficient of unit length, and l is the water delivery loss;
calculating the water utilization coefficient eta of the unit length according to the calculation, and calculating the water utilization coefficient at any position of the main canal by using a formula 2-1;
according to the water utilization coefficient at any position obtained by calculation in the previous step, the obtained net water demand parameter W at each water diversion port door is combineddThe water supply quantity W required by any position of the main canal can be determinedd’。
(3) According to the technical scheme, the water supply quantity required for meeting the water delivery safety is obtained by adopting a two-wheel reduction technology. The two-round reduction technical method comprises the following specific steps:
taking the city water supply as the main purpose of the diversion project as an example, the city domestic water supply has the highest guarantee degree, the industry water has the next guarantee degree, and finally the water for agriculture and the like (namely, according to the water supply application, the water demand is divided into three categories of water demand for agriculture and the like, industry water demand and domestic water demand, which are respectively marked as Wda，Wdi,WddThe total number t of water supply categories is 3, Wd＝Wda+Wdi+Wdd)
According to the water supply target and task of the diversion project, when the water demand requirement and the constraint condition are contradictory, the three water demand reduction orders are determined, and the water demand purpose reduction order and the water supply guarantee rate are in a reverse relation mode, namely the higher the water supply guarantee rate is, the later the reduction order is.
And (3) adopting a circulating trial calculation traversal solution to obtain the reduced water quantity of various water demands under the water shortage condition:
firstly, determining a first round of reduction objects according to the designed water distribution proportion. When the average water consumption ratio of the preferential reduction object for many years is more than 1/t, only reducing the preferential reduction object in the first round; when the average water usage ratio for many years of the preferentially reduced objects is less than 1/t, the first reduction is carried out on each object except the preferentially ensured objects.
Determining the upper limit value alpha of the first round reduction coefficient by adopting a trial algorithm1. Assuming a reduction coefficient, adopting the water supply and demand data measurement and calculation in the dry year to obtain a critical state which preferentially ensures that the category water demand is not damaged when the flow scale constraint conditions of the water diversion port door and the channel safe water delivery are both met, and the critical state is the upper limit of the reduction coefficient of the first round of water quantity.
Thirdly, the water quantity of the first round is reduced, and the reduction coefficient alpha (alpha is less than or equal to alpha) is used for reducing the object of the first round1) Multiplying by Wda(or W)da，Wdi) And obtaining the water demand after the first round of reduction.
And fourthly, after the water quantity of the first round is reduced, the current constraint condition can be met, the water quantity reduction process is finished, and otherwise, the water quantity of the second round is reduced.
And fifthly, multiplying the second round of reduction objects by various water requirements after the first round of reduction respectively by a reduction coefficient alpha' until the current constraint condition is met to obtain the water requirements after the second round of reduction.
(4) According to the technical scheme, the scheduling method adopts the two-step reduction technology according to the water delivery safety constraint condition to obtain the water demand after initial adjustment. The specific method comprises the following steps:
for the design flow scale constraint condition of the water diversion port door, adopting a traversal search method to obtain various water demands (W) of each water diversion port door at the current time periodda、Wdi、Wdd) Divided by the total duration of the face time interval to obtainWater flow (Q) like demandda、Qdi、Qdd) Judging whether the total water flow of the water dividing port door exceeds the design flow Qc(ii) a When Q isda+Qdi+Qdd＞QcThe two-wheel reduction technology is adopted to reduce the water demand of the water diversion port door at the current stage until Q is metda+Qdi+Qdd≤QcAs shown in fig. 2.
For the constraint condition of the design flow scale of the channel, a multiple traversal search method is adopted, the calculation method considering the water delivery loss in the second step is adopted from the tail end of the channel, and the sum of the water flow demand of all the water diversion port doors at the downstream of each section is calculated upstream in sequence
Figure GDA0002864720500000081
(N is the total number of the water diversion port doors, the number of the most upstream water diversion port door is 1, and so on, the number of the most downstream water diversion port door is N, i0Numbering the water gate at the position of the section) to judge whether the water supply flow required by the section exceeds the maximum overflow Qmax. When in use
Figure GDA0002864720500000082
Adopting the two-wheel reduction technology for all the water diversion port doors at the downstream of the section until the section meets the requirements
Figure GDA0002864720500000091
The constraint of (2). The process is repeatedly applied to the head until all the sections meet
Figure GDA0002864720500000092
A constraint condition.
According to the water demand determined in the previous step, multiplying the time interval duration to obtain the water demand W of each water diversion port door meeting the water delivery safety constraint conditiond,i’。
(5) According to the dispatching method of the technical scheme, the water demand is determined according to the previous step and the obtained water diversion quantity V of the channel head0Determining the water quantity of the on-line regulating reservoir at different time intervals by adopting an optimization decision technologyVinAnd volume of water discharged from storehouse Vout(Nr is the position of a water diversion port door where the on-line water diversion reservoir is located), the specific method comprises the following steps:
according to the current water level H of the on-line storage reservoiriAnd judging whether the on-line regulation and storage reservoir can draw water from the upstream or not by using the reservoir dispatching diagram. When the water level of the on-line storage reservoir exceeds the limit water guiding level Hi≥HGuiding deviceThen on-line regulating and storing reservoir water quantity Vin0, initial value of water quantity out of warehouse
Figure GDA0002864720500000093
The water is supplied to the downstream by utilizing the early-stage water storage capacity of the on-line regulation and storage reservoir. When the water level of the on-line storage water reservoir is lower than the limit water introduction level Hi＜HGuiding deviceConsidering the relation between the water diversion quantity of the canal head and the water supply quantity needed and the water storage state of the on-line regulating reservoir, determining VinAnd VoutThe specific method comprises the following steps:
when the available water supply can meet the water supply demand, i.e.
Figure GDA0002864720500000094
Then regulating the water quantity of the reservoir on line
Figure GDA0002864720500000095
And further judging whether to fill the reservoir according to the water storage state of the on-line regulation reservoir. When the water level of the on-line storage reservoir does not exceed the early water level Hi≤H0And then regulating the initial value of the water quantity of the reservoir on line
Figure GDA0002864720500000096
So can store some canal leader diversion in the storehouse for can supply water to the low reaches in the time slot that the diversion volume of canal leader is insufficient, avoid the canal leader to come the uneven time, the low reaches user needs the water process to suffer destruction. When the water level of the on-line storage reservoir exceeds the early year water level Hi＞H0Then, then
Figure GDA0002864720500000101
When the available water supply can not meet the water supply demand, that is
Figure GDA0002864720500000102
Determining the warehousing water quantity according to the relation between the water drawing quantity and the total water supply quantity required at the upstream of the on-line regulating and storing reservoir; when the canal head can draw water, the water supply quantity of the upstream total water supply quantity of the on-line regulation and storage reservoir can be met
Figure GDA0002864720500000103
Then regulating and storing the water quantity of reservoir on line
Figure GDA0002864720500000104
When the available water quantity of the canal head can not meet the total water supply quantity required at the upstream of the on-line storage and regulation reservoir, namely
Figure GDA0002864720500000105
Then regulating and storing the water quantity V of reservoir storage on lineinThe water supply quantity at each upstream water division port door is 0
Figure GDA0002864720500000106
According to the relation between the water level of the on-line regulating and storing reservoir and the limited water supply level, the water quantity discharged from the on-line regulating and storing reservoir is calculated according to two types of situations, the maximum utilization of the regulated and stored water quantity is realized, and the shortage value of the downstream water demand is met
Figure GDA0002864720500000107
The specific method comprises the following steps:
when the water level of the on-line storage water reservoir is not lower than the limit water supply level Hi≥HFor supplying toThen regulating the water quantity of the reservoir on line
Figure GDA0002864720500000108
Therefore, the downstream water demand can be met by utilizing the online storage capacity. When the water level of the on-line storage water reservoir is lower than the limit water supply level Hi<HFor supplying toIf the downstream water demand is reduced by the water supply reduction coefficient gamma in the reservoir dispatching diagram, the water outlet quantity of the reservoir is regulated on line
Figure GDA0002864720500000109
Determining the end storage capacity of the time period of the online storage regulating reservoir according to the water balance relational expression:
Vin+Vrunoff-Vout-Ved-Vloss＝ΔV (2-2)
in the formula (2-2), VrunoffIndicating the natural runoff of the on-line storage reservoir, VedNatural lower discharge volume, V, representing the demand of on-line regulated reservoirlossAnd the water loss of the online regulating and storing reservoir is represented, and the delta V represents the current storage capacity variation of the online regulating and storing reservoir.
Calculating the final storage capacity V of the on-line regulating reservoir time intervalPowder＝VFirst stage+ Δ V, wherein VFirst stageInitial storage capacity for the time interval of the on-line storage reservoir; and Δ V represents the current storage capacity variation of the online storage regulating reservoir. When the storage capacity is lower than the dead storage capacity V at the end of the time period of the on-line storage regulation reservoirPowder<VDeath by deathWherein V isDeath by deathRegulating the dead storage capacity of the reservoir on line; let VPowder＝VDeath of diseaseThe water quantity V of the on-line regulating reservoir is inversely calculated according to the formula (2-2)outThus, the maximum water supply amount capable of being used for downstream consumers is obtained; then calculating the water supply amount of each downstream water dividing port door
Figure GDA0002864720500000111
When the end storage capacity exceeds the maximum storage capacity V in the period of the on-line storage regulating reservoirPowder>VmaxLet VPowder＝VmaxAnd inversely calculating the water storage quantity V of the on-line storage reservoir according to the formula (2-2)inThus obtaining the application mode of the on-line regulating and storing reservoir with the minimum water abandon amount; the final value is optimized and determined in the process of regulating the water quantity of the reservoir to be stored and the water quantity of the reservoir to be discharged on line.
Example 1:
now, the method of the present invention is used to explain this embodiment in detail by taking a large diversion project in a certain area as a research object, and simultaneously, the present invention also has a guiding function for the scheduling of the diversion project applied to other areas.
The water supply objects of the diversion project in the embodiment are mainly urban domestic water, production industrial water and agricultural irrigation water. The average water diversion quantity of the diversion project in the embodiment is 7.70 hundred million m3(type II), in which 2.41 hundred million m of domestic water is supplied to cities and towns3Accounting for 31.3 percent of the total water diversion amount; 3.33 hundred million meters of water is supplied to the production industry3Accounting for 43.2 percent of the total water diversion amount; 1.96 hundred million m water supply for agricultural irrigation3Accounting for 25.5% of the total water diversion. 28 water distribution port doors are arranged along the line of the engineering main canal (1 water distribution port door which comprises an online storage reservoir warehousing check gate and is also used as a water distribution gate and is numbered as 20).
The total length of the diversion project main canal head to the diversion opening (number 6) of the river jacket of the embodiment is 80.6km, and the total water utilization coefficient is 0.985; the total length from the diversion opening of the river jacket to the diversion opening (number 15) of the Huayang river is 59.83km, and the total water utilization coefficient is 0.975; the total lengths from the water diversion port of the Huayang river to the on-line regulation and storage reservoir and from the on-line regulation and storage reservoir to the end of the canal are 41.84km and 87.4km respectively, and the total water utilization coefficient is 0.98.
The scheduling diagram of the on-line storage reservoir adopting the method of the invention is shown in figure 3. The present embodiment is set to the annual initial reservoir level 112.0m of the on-line regulated storage reservoir.
The method for scheduling the on-line regulation and storage reservoir by adopting the method comprises the following steps,
(1) total main canal water delivery loss calculation
The water utilization coefficient per unit length from the head of the main canal to the diversion port of the river jacket is calculated and obtained 0.99981, the water utilization coefficient per unit length from the diversion port of the river jacket to the diversion port of the Huayang river is calculated and obtained 0.99958, the water utilization coefficient per unit length from the diversion port of the Huayang river to the on-line storage reservoir is calculated and obtained 0.99953, and the water utilization coefficient per unit length from the on-line storage reservoir to the end of the canal is calculated and obtained 0.99976. And calculating the accumulated water utilization coefficient at each water diversion port door node by using the water utilization coefficient of the unit length.
(2) Calculating the water demand satisfying the water delivery safety constraint condition
1) First round water volume reduction object determination
Since the average agricultural irrigation water supply accounts for 25.5% of the total water diversion water supply for many years, and the water quantity in the first round is less than 1/3, the agricultural irrigation water supply and the industrial water supply are reduced.
2) First round water yield reduction coefficient upper limit determination
And (3) calculating water supply and demand data in the dry year, wherein when the water delivery safety constraint condition is met, the water yield reduction coefficient is 0.75 under the critical state of preferentially ensuring that the category water demand is not damaged, namely the upper limit of the water yield reduction coefficient of the first round is 0.75.
3) Design flow scale constraint condition of water diversion port door
Calculating that the water flow required by the water diversion port of the Yangmu ditch, the water diversion port of the Qifang town and the water diversion port of the Jihe exceeds the designed water diversion flow, and adjusting the water flow required by the water diversion port door at the three positions by adopting a two-wheel reduction technology.
4) Maximum channel overflow constraint condition
Calculating to obtain the overflow of the diversion openings of the canal, the river jacket and the Zhuang reservoir at the 6-month canal diversion openings to exceed the flow capacity of the channel, and adjusting the water flow demand of all the diversion opening doors at the downstream of the corresponding diversion opening door by adopting a two-wheel reduction technology, so that the agricultural water demand of the diversion opening doors below the river jacket diversion opening door in the 6-month canal is reduced.
(3) Calculating the water quantity V of the reservoir on lineinVolume of water discharged from warehouse VoutAnd the water supply amount W of each water division port doord' the processes of regulating and storing the water quantity of the reservoir in storage and the water quantity of the reservoir out of the storage on line are shown in table 1:
TABLE 1 Online regulating and storing reservoir water inlet and outlet process
Figure GDA0002864720500000131
As can be seen from Table 1, the online storage regulating reservoir charges the reservoir by 11 months of water diversion; when the diversion quantity of the canal head is insufficient in 4 months, the canal head is utilized to divert water to meet the requirement of supplying water to the water diversion port door above the online storage regulating reservoir, the water is supplied to the downstream by utilizing the capacity of the online storage regulating reservoir, the water level of the online storage regulating reservoir is lower than the limiting water supply line at the moment, the water demand of the downstream water diversion port door is reduced according to the water supply reduction coefficient, and the relative water demand of the downstream total water supply is reduced by 141 ten thousand meters3. If the function of the on-line reservoir is not realized, the agricultural water and the industrial water at the full-line water diversion port door are reduced by 865 ten thousand meters3(ii) a In other months, the water is directly guided by the canal head to supply water to the downstream water diversion port door. When the dispatching year is over (at the end of 10 months), the water level of the storage reservoir is adjusted on line 112.72m, which is slightly higher than the early-year water level, the total reservoir capacity and the yearThe initial basic balance is kept, and the reservoir operation condition is good. The water requirement of the main channel full-line water distribution port is met except for 4 and 6 months. The water demand of the water diversion port exceeds the water delivery safety limit in 6 months, so that the water demand for life is reduced by 47 ten thousand meters3And the industrial water demand is reduced by 145 ten thousand meters3And the agricultural water demand is reduced by 536 ten thousand meters3(ii) a Water supply amount of 5306 ten thousand meters is needed for water distribution port door in 4 months34440 ten thousand meters of water diversion quantity far exceeding the canal head3By reasonably utilizing the online storage reservoir, the water demand for life is reduced by only 62 ten thousand meters3The industrial water demand is reduced by 79 ten thousand meters3The water demand of the water diversion port additionally meets 724 ten thousand meters3And the water requirement satisfying condition of the user is obviously improved.
As can be seen from example 1: the scheduling method applied to the large-scale water diversion and distribution project with the on-line storage reservoir can make full use of the on-line storage reservoir for reasonable allocation, solves the problem of unmatched water supply process and user water demand process on the premise of meeting the water delivery safety, realizes rapid and reasonable distribution of available water supply amount, and avoids excessive damage to a certain kind of water demand. Other parts not described belong to the prior art.

Claims (3)

1. The large-scale water diversion and regulation project scheduling method applied to the reservoir containing online regulation and storage is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,
the method comprises the following steps: inputting basic data;
obtaining design parameters of diversion project, variable diversion volume V of project0And the net water demand W at the water diversion portd,iOn-line regulating reservoir dispatching diagram, water level-reservoir capacity relation curve and reservoir water loss VlossWater level at the beginning of the year, natural runoff and lower drainage quantity;
step two: calculating the water delivery loss amount of any position of the main channel;
in the second step, the method for calculating the water delivery loss amount of any position of the main canal specifically comprises the following steps: and (3) calculating the water utilization coefficient per unit length by using an equation (2-1) according to the total water utilization coefficient of the total main channel:
ηc＝ηl (2-1)
in the formula etacCalculating the distance between the cross section and the head of the canal, namely km, for the total water utilization coefficient of the canal section, wherein eta is the water utilization coefficient of unit length, and l is the water delivery loss;
according to the water utilization coefficient eta of unit length obtained by the previous step, the water utilization coefficient eta at the section of any water diversion port door of the main trunk canal is calculated by the formula (2-1)x；
According to the obtained water utilization coefficient at any section, the net water demand W at each water diversion port doord,iCalculating the water supply quantity W required at any position of the main canald’；
Setting the total number of the diversion gate as N, and setting the position of the diversion gate where the on-line regulation and storage reservoir is located as NrThe required water supply amount W considering the water delivery loss is arranged at the section of the main canal where the ith water dividing port door is positionedd,i' is:
Figure FDA0003586187220000011
Figure FDA0003586187220000012
in the formulae (2-2) and (2-3) (. eta.)iThe water utilization coefficient V of the section of the ith water diversion port door of the main channellossThe water loss of the reservoir is regulated and stored on line; wd,iThe net water demand at the ith water diversion port door is represented;
step three: calculating the water demand meeting the water delivery safety constraint condition;
determining a water supply guarantee sequence according to the purpose of the water diversion and regulation project;
the method for calculating the water demand meeting the water delivery safety constraint condition comprises the following steps: determining a first round water quantity reduction object, determining a first round water quantity reduction coefficient upper limit, determining a design flow scale constraint condition of a water diversion port door and determining a maximum channel overflow constraint condition;
step four: calculating the water quantity V of the reservoir on lineinVolume of water discharged from warehouse VoutAnd the water supply amount of each water diversion port door;
according to Vin+Vrunoff-Vout-Ved-VlossCalculating the change delta V of the storage capacity in the period of the on-line regulating reservoir and then calculating the final storage capacity V in the period of the reservoirPowder＝VFirst stage+ Δ V, further judging the relation between the last storage capacity and the upper and lower constraint conditions of the storage capacity;
when V isPowder<VDeath by deathLet VPowder＝VDeath by deathAnd back-calculating the water quantity V discharged from the reservoirout＝Vin+Vrunoff-Ved-Vloss-VDeath by death+VFirst stageThen calculating the water supply amount of each downstream water dividing port door
Figure FDA0003586187220000021
When V isPowder>VmaxLet VPowder＝VmaxObtaining the water quantity of the reservoir to be put in storage on line;
in step three, the method for determining the water volume reduction object in the first round specifically comprises the following steps:
according to the purpose of the diversion project, determining the water supply guarantee sequence as a first type water use project, a second type water use project and a third type water use project; wherein, the first type of water engineering has the highest guarantee degree;
when the average water diversion amount of the third type of water use project for many years does not exceed 1/3 in the total water diversion amount, the first round of reduction of the third type of water use project and the second type of water use project;
when the average water diversion amount of the third type of water use project for many years is larger than 1/3, only reducing the third type of water use project in the first round;
in the third step, when the first round of reduction is carried out on the third type of water use engineering and the second type of water use engineering, the first round of reduction method comprises the steps of determining the upper limit of a first round of water quantity reduction coefficient, the design flow scale constraint of a water diversion port door and the maximum channel overflow constraint;
in the fourth step, the position of the water diversion port door where the on-line water regulation reservoir is arranged is Nr, and the initial reservoir water level and the reservoir capacity in the current time period are respectively HiAnd Vi,0Natural runoff of VrunoffThe required amount of the discharged water is VedWater loss is Vloss(ii) a Early year water level H0Limiting water diversion level H in reservoir dispatching diagramGuiding deviceLimiting the water supply level HFor supplying toLimiting the water supply reduction coefficient gamma;
when H is presenti≥HGuiding deviceThen V isin＝0，
Figure FDA0003586187220000031
When H is presenti＜HGuiding deviceFurther judging the diversion quantity V of the canal head0Relation with water supply quantity
Figure FDA0003586187220000032
When in use
Figure FDA0003586187220000033
Then
Figure FDA0003586187220000034
Further judging whether to charge the reservoir according to the water storage state of the on-line regulation reservoir;
when H is presenti≤H0Then, then
Figure FDA0003586187220000035
Using a canal head to guide water to fill the reservoir;
when H is presenti＞H0Then, then
Figure FDA0003586187220000036
At present, the canal head is not used for introducing water to fill the reservoir;
when in use
Figure FDA0003586187220000037
Further judging the diversion quantity V of the canal head0And the total water supply quantity required at the upstream of the on-line storage reservoir
Figure FDA0003586187220000038
Calculating and warehousing the relation betweenWater quantity;
when in use
Figure FDA0003586187220000039
Then the
Figure FDA00035861872200000310
When the temperature is higher than the set temperature
Figure FDA00035861872200000311
Then Vin0, the water supply amount of each water dividing door at the upstream is
Figure FDA00035861872200000312
Further judging the relation between the water level of the on-line storage water reservoir and the limited water supply level to calculate the quantity of discharged water;
when H is presenti≥HFor supplying toThen, then
Figure FDA00035861872200000313
When H is presenti<HFor supplying toThen regulating the water quantity of the reservoir on line
Figure FDA00035861872200000314
2. The large-scale water diversion and regulation project scheduling method applied to the on-line regulation and storage reservoir according to claim 1, characterized in that: the design parameters of the diversion and water regulation project comprise the design flow scale of each water diversion port door, the maximum flow of the channel and the total water utilization coefficient eta of the channelc。
3. The large-scale water diversion and regulation project scheduling method applied to the on-line regulation and storage reservoir according to claim 2, characterized in that: in step three, the determination of the design flow scale constraint of the water diversion port door comprises the following steps:
recording the water requirements of the first type water engineering, the second type water engineering and the third type water engineering as W respectivelyda，Wdi，Wdd；
For each water distribution port door of the whole main channel line, dividing the water demand of the water distribution port door by the time duration of the faced time period to calculate the water demand of the water distribution port door; recording the water flow rates of the first type water use project, the second type water use project and the third type water use project as Qda、Qdi、Qdd；
Comparing the water flow rate Q required by each water distribution port door of the total main channel whole lined,iAnd design flow Qc,iRelation, when Qd,i≤Qc,iIf the constraint condition of the water diversion port door is met, entering the next constraint condition judgment; when Q isdi>Qc,iThe water flow required by the water diversion port door is reduced by adopting the following two-wheel reduction technology:
first round of reduction: reducing the third type and the second type of water using projects of the water diversion port door, wherein the reduction coefficient alpha is less than or equal to alpha1；
When alpha Qda+αQdi+Qdd≤QcIf the water quantity reduction is finished, otherwise, entering a second reduction process; wherein QcTo design a total flow rate;
and (3) second-round reduction: on the basis of the first round of reduction, various types of water of the water diversion port door are reduced by a reduction coefficient alpha 'to ensure that the alpha' alpha1Qda+α’α1Qdi+α’Qdd≤QcAnd ending the reduction of the water amount.
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