CN104537576B - Water probability pre-control scheduling model and dispatching method are abandoned in across basin water station group equilibrium - Google Patents
Water probability pre-control scheduling model and dispatching method are abandoned in across basin water station group equilibrium Download PDFInfo
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Abstract
Water probability pre-control scheduling model and dispatching method are abandoned the invention discloses across the basin water station group equilibrium of one kind, the maximum in each season regulation performance above power station in across basin water station group is abandoned to water probability minimum and is used as optimization aim, architecture is coordinated using " across basin water station group power station " bilevel optimization, load optimal distribution is directly carried out between all power stations.The present invention can realize the equalization of multiple power generation main body risks and interests, and a kind of new method is provided for many power generation main body GROUP OF HYDROPOWER STATIONS joint optimal operations.
Description
Technical field
Water probability pre-control scheduling model and dispatching method are abandoned the present invention relates to across the basin water station group equilibrium of one kind, belongs to water
Sharp water power dispatching technique field.
Background technology
When two basin water station groups access same power network, there is close electric power connection between two basin water station groups
System.For any instant, the gross generation sum in two basins is with respect to determination, generating of the power network to first GROUP OF HYDROPOWER STATIONS
Amount is big, then the generated energy to second GROUP OF HYDROPOWER STATIONS is then small, and vice versa.When flood season two, basin faced larger water, two
Individual GROUP OF HYDROPOWER STATIONS is intended to increase its generated energy, is reduced by way of increasing generating flow and abandons water probability and abandon water.In flood
During last two basin retaining, it is required to expect to reduce generated energy, to raise reservoir level as early as possible, reduces generating water consumption rate.Therefore, both sides
Often occurs scheduling intent conflict in flood season.Now, current technology solution is the current level according to each power station
Deviation between flood season limit level, and face the size of period reservoir inflow and Incoming water quantity, by rule of thumb each water of fuzzy discrimination
The substantially degree of risk of water is abandoned in power station, and formulates each hydropower station plan accordingly.Due to this mode non-quantification point
The probability that water is abandoned in each power station is analysed, therefore across the basin water station group flood season sharing of load become more meticulous can not be realized, it is difficult to
Hydropower Stations are prevented effectively to occur unnecessary to abandon water.
The content of the invention
Water probability pre-control scheduling model and scheduling are abandoned it is an object of the invention to provide across the basin water station group equilibrium of one kind
Method, proposes rational distribution method of the gross generation between each power station in two basins across basin water station group so that two streams
Abandon water probability of each power station in domain in the scheduling end of term is consistent or state the most in a balanced way, solves each power station in the basin of flood season two
Generating sequencing problem.
To reach above-mentioned purpose, the technical solution adopted by the present invention is as follows：
Water probability pre-control scheduling model is abandoned in across basin water station group equilibrium, and the model will each water in across basin water station group
The maximum in power station is abandoned water probability and minimized as object function, i.e.,：
J=min { max [Fi(Vi,n)] i=1,2 ..., S (1)
Wherein：If i-th of power station is more than season regulation performance FiWater probability, otherwise, F are abandoned for the power stationiValue
It is zero；Vi,nFor i-th of power station scheduling end of term water level, n represents to dispatch the end of term；S is the power station sum across basin water station group.
Foregoing model meets following constraints：
Water balance equation：
Vi,j+1=Vi,j+(Ii,j-Qi,j)ΔtjI=1,2 ..., S；J=1,2 ..., T (2)
Electric quantity balancing equation：
Flow coupling constraint：
Ii+1,j=Qi,j+Ri+1,jI=1,2 ..., N-1；J=1,2 ..., T (4)
Ii+1,j=Qi,j+Ri+1,jI=N+1, N+2 ..., N+M-1；J=1,2 ..., T (5)
Reservoir level is constrained：
Zi,min≤Zi,j≤Zi,maxI=1,2 ..., S；J=1,2 ..., T (6)
Storage outflow is constrained：
Qi,min≤Qi,j≤Qi,maxI=1,2 ..., S；J=1,2 ..., T (7)
Output of power station is constrained：
Ni,min≤Ni,j≤Ni,maxI=1,2 ..., S；J=1,2 ..., T (8)
Wherein, Vi,jRepresent i-th of power station jth period storage capacity；ΔtjRepresent jth Period Length；When T indicates T
Section；EiFor the generated energy in i-th of power station；EtFor across the gross generation of basin water station group；Ii,j,Ri,jI-th of water is represented respectively
Power station jth period total reservoir inflow, interval reservoir inflow；N is the power station quantity of first Hydropower Stations；M is second
The power station quantity of GROUP OF HYDROPOWER STATIONS；Zi,j,Zi,min,Zi,maxRespectively i-th power station jth period reservoir level, the minimum storehouse water of permission
Position and highest reservoir level；Qi,j,Qi,min,Qi,maxRespectively i-th power station jth period storage outflow, minimum and maximum outbound
Flow restriction；Ni,j,Ni,min,Ni,maxRespectively i-th power station jth period active power output, minimum and maximum active power output limit
System.
Water probability pre-control dispatching method is abandoned in across basin water station group equilibrium, is comprised the following steps：
(1)：Obtain the real-time reservoir level and across basin water station group gross generation E in each power stationt；
(2)：Required according to the final convergence precision of power energy allocation, and take into account consideration Algorithm for Solving rate request, it is determined that electric
Measure allocative decision iteration running orbit convergence criterion epsilonEWith initial generated energy discrete steps Δ E；
(3)：All power stations are given according to installed capacity proportional allocations by across basin water station group gross generation, are formed just
Beginning allocative decision；
(4)：With reference to original allocation scheme, calculate respectively each season regulation above power station the scheduling end of term to abandon water general
Rate；
(5)：Since the first season regulation performance above power station, compare itself and the second season regulation performance above water power
That stands abandons water probability；If the first season regulation performance above hydroelectric station surplus water likelihood ratio the second season regulation performance above power station
To abandon water probability big, then be transferred to step (6)；If the first season regulation performance above hydroelectric station surplus water probability is adjusted less than the second season
Performance above hydroelectric station surplus water probability is saved, then is transferred to step (11)；
(6)：First season regulation performance above hydropower station amount increase Δ E, and use and determine water model with electric and calculate
Generated energy, is then transferred to step (7)；
(7)：If average generated output is assembled more than machine after the increase generated energy Δ E of the first season regulation performance above power station
Machine capacity, then calculate the generated energy in corresponding schedule periods according to unit installed capacity；If reservoir level is less than after increase generated energy Δ E
Allow minimum pool level, then according to minimum pool level inverse generated energy and its increment is allowed, be transferred to step (8)；
(8)：If there is power station below one or more season regulation performances between power station in the two seasons regulation performance above,
Then calculate the gross generation in power station below these regulation performance successively using principle of water balance in seasons, and calculate total hair
The difference of the gross generation in corresponding power station, is designated as Δ E ' in electricity and original allocation scheme, is transferred to step (9)；
(9)：The generated energy in the second season modulability performance above power station is reduced into Δ E+ Δ E ', and use and determines water with electric
Model calculates the generating flow in the power station, is then transferred to step (10)；
(10)：If in step (9), the primary electricity E in the second season regulation performance above power station2Less than Δ E+ Δ E ',
Then the hydropower station amount reduces E2, the first season regulation performance above power station and power station generated energy reduce Δ E+ Δs
E′-E2；If reducing E2The power station reservoir level is beyond peak level is allowed afterwards, then according to allowing, peak level is counter to push away generated energy, so
After be transferred to step (12)；
(11)：First season regulation performance above hydropower station amount reduction Δ E, equally calculates season in the middle of two power stations
The difference Δ E ' of the gross generation in corresponding power station in the gross generation and original allocation scheme in power station below regulation performance, and will
The generated energy increase Δ E+ Δ E ' in the second season regulation performance above power station, are then transferred to step (12)；
(12)：That compares all season regulation performance above power stations two-by-two successively abandons water probability, and adjusts the regulation of two seasons
Performance above power station and the generated energy in middle power station；
(13)：Travel through behind all season regulation performance above power stations, recorded each season regulation performance above power station
Generating share { E1,E2..., EN}；
(14)：Judge the maximum generating watt luffing Δ E of scheme and the original allocation scheme of step (3) that (13) are obtainedmax,
If Δ Emax＞ εE, then repeat step (5) is to step (13)；If Δ Emax＜ εEBut Δ E ＞ εE, then Δ E=Δ E/2 are made, repeat to walk
Suddenly (5) to step (13)；If Δ Emax＜ εEAnd Δ E ＜ εE, then iterative process is terminated；
(15)：According to the generation capacity allocation scheme in each power station of last time, and the minimum water consumption in single storehouse is carried out successively
Generate electricity and calculate, obtain the power generation process and generated energy in each power station.
In foregoing step (4), adjusting the computational methods of abandoning water probability of the above power station in the scheduling end of term season is：
The definition of probability that power station is abandoned into water during [t, t+ Δ t] is hydroelectric station surplus water probability；
If chopped-off head power station, then calculating first is needed to obtain critical reservoir inflow I '1, then in chopped-off head power station day
By interpolation in right reservoir inflow probability distribution curve, reservoir inflow is obtained more than the critical reservoir inflow I '1Probability, be
The probability of water is abandoned in the chopped-off head power station, wherein, critical reservoir inflow I '1It is defined as：
I′1=Q1,gen+(V1,l-V1,0)/Δt
In formula, V1,lFor Limited Water Level of Reservoir in Flood Season correspondence storage capacity, Q1,genFlow, V are completely sent out for unit1,0For power station it is current when
Carve storage capacity；
If being non-chopped-off head power station, need calculating first to obtain reservoir inflow R ' between critical zone, then enter in interval
By interpolation in the flow probability distribution curve of storehouse, interval reservoir inflow stochastic variable R is obtainediMore than the critical interval reservoir inflow
R ' probability, is the probability that water is abandoned in the power station, wherein, critical interval reservoir inflow R ' is defined as：
In formula, Qi,genUnit for the non-chopped-off head power station of i-stage completely sends out flow, Vi,lFor the non-chopped-off head power station news limit of i-stage
Water level correspondence storage capacity, Vi,0For the storage capacity at i-stage non-chopped-off head power station current time,It is non-to have calculated obtained i-stage
Total storage outflow desired value of the upper pond in chopped-off head power station.
By using above-mentioned technical proposal, the present invention has the advantages that：
By the invention it is possible to always be generated electricity according to the current reservoir level across basin water station group and two given basins
Amount, the generated energy for calculating each power station by computer software Automatic Optimal optimizes distribution share so that each power station is in scheduling
What the end of term faced, which abandon water probability, reaches the target equalized the most, and theoretical prop up is provided for two basin power generation in the flood seasons amounts optimization distribution
Support, can avoid Hydropower Stations to abandon the situation of water to greatest extent.In addition, it is suitable for many power generation main bodies
GROUP OF HYDROPOWER STATIONS, realizes the equalization of multiple power generation main body risks and interests, is many power generation main body GROUP OF HYDROPOWER STATIONS joint optimal operations
There is provided a kind of new method.
Brief description of the drawings
Fig. 1 is across basin water station group schematic diagram in embodiments of the invention.
Embodiment
The present invention is described in further detail in conjunction with the drawings and specific embodiments.
Equilibrium abandons water probability joint pre-control dispatching method and solves the problems, such as flood season across the basin water electric sequencing of power station mass-sending, leads to
Cross reasonable distribution of the gross generation between each power station so that water probability is abandoned in the most equal in each power station the scheduling end of term
The state of weighing apparatus.
The present invention coordinates architecture using " across basin water station group-power station " bilevel optimization, directly in all power stations
Between carry out load optimal distribution, not only avoided the definition that water probability is integrally abandoned in basin, and due to reducing a coordination
Level, can cause the solution efficiency of problem significantly to be lifted.The present invention considers power station inside basin in mathematical modeling
Between there is hydraulic connection, and the characteristic of hydraulic connection is not present between two different basin water power stations.
First, water probability pre-control scheduling model is abandoned in equilibrium
Equilibrium abandons water probability joint pre-control and dispatches the Optimal Control Problem that end of term water level is dispatched for solution, sets up conventional
On Optimized Scheduling of Hydroelectric Power theory, and its achievement system is expanded.The joint pre-control scheduling of water probability is being abandoned using equilibrium
When optimizing each power station end water level, imitated in each power station schedule periods still according to conventional maximum generating watt model/maximum generation
Beneficial model optimizes calculating, it would however also be possible to employ with reference to the routine dispactching method of artificial optimization's experience.
The maximum in each power station in across basin water station group is abandoned to water probability to minimize as object function, i.e.,：
J=min { max [Fi(Vi,n)] i=1,2 ..., S (1)
In formula：If i-th of power station is more than season regulation performance FiWater probability, otherwise, F are abandoned for the power stationiValue
It is zero；S is the power station quantity across basin water station group, Vi,nDispatch general in end of term water level, reservoir operation for i-th of power station
N period is all divided into, initial is referred to as V0, behind be followed successively by V1, V2... ..., Vn, so Vi,nFor the end of term in i power station
Water level.
By taking across the basin water station group of 2 Hydropower Stations composition shown in Fig. 1 as an example, N is first cascade hydropower
Stand the power station quantity of group, M is the power station quantity of second Hydropower Stations, then S=N+M.
It is as follows that above-mentioned object function need to meet constraints：
Water balance equation：
Vi,j+1=Vi,j+(Ii,j-Qi,j)ΔtjI=1,2 ..., S；J=1,2 ..., T (2)
Electric quantity balancing equation：
Flow coupling constraint：
Ii+1,j=Qi,j+Ri+1,jI=1,2 ..., N-1；J=1,2 ..., T (4)
Ii+1,j=Qi,j+Ri+1,jI=N+1, N+2 ..., N+M-1；J=1,2 ..., T (5)
Hydropower station water level is constrained：
Zi,min≤Zi,j≤Zi,maxI=1,2 ..., S；J=1,2 ..., T (6)
Storage outflow is constrained：
Qi,min≤Qi,j≤Qi,maxI=1,2 ..., S；J=1,2 ..., T (7)
Output of power station is constrained：
Ni,min≤Ni,j≤Ni,maxI=1,2 ..., S；J=1,2 ..., T (8)
Wherein, Vi,jRepresent i-th of power station jth period storage capacity；ΔtjRepresent jth Period Length；When T indicates T
Section；EiFor the generated energy in i-th of power station；EtFor across the gross generation of basin water station group；Ii,j,Ri,jI-th of water is represented respectively
Power station jth period reservoir inflow, interval reservoir inflow；Zi,j,Zi,min,Zi,maxPhase library water during respectively i-th power station jth
Position, permission minimum pool level and highest reservoir level；Qi,j,Qi,min,Qi,maxRespectively i-th power station jth period storage outflow,
Minimum and maximum storage outflow is limited, and wherein minimum and maximum storage outflow limitation will according to unit conveyance capacity and comprehensive utilization
Ask determination；Ni,j,Ni,min,Ni,maxRespectively i-th power station jth period active power output, the limitation of minimum and maximum active power output,
Wherein the limitation of minimum and maximum active power output requires to determine according to unit output scope and network load.
2nd, water probability pre-control scheduling model method for solving is abandoned in equilibrium
Abandoning water probability pre-control scheduling model for across basin water station group equilibrium has period aftereffect, can not use dynamic
The characteristics of planing method is solved, the present invention proposes to improve discrete differential progressive optimal algorithm (Discrete Differential
Progressive Optimal Algorithm, DDPOA), model solution speed is effectively improved under conditions of solving precision is kept
Degree.
Water probability pre-control dispatching method is abandoned in across the basin water station group equilibrium of the present invention, is comprised the following steps：
Step1：Obtain the real-time reservoir level and across basin water station group gross generation E in each power stationt。
Step2：Required according to the final convergence precision of power energy allocation, and take into account consideration Algorithm for Solving rate request, it is determined that
Power energy allocation scheme iteration convergence criterion epsilonEWith initial generated energy discrete steps Δ E (Δ E ＞ εE)。
Step3：All power stations are given according to installed capacity proportional allocations by across basin water station group gross generation, are formed
Original allocation scheme.
Step4：With reference to original allocation scheme, calculate respectively each season regulation above power station the scheduling end of term to abandon water general
Rate；
The computational methods for abandoning water probability are：
The definition of probability that power station is abandoned into water during [t, t+ Δ t] is hydroelectric station surplus water probability.
If chopped-off head power station, then calculating first is needed to obtain critical reservoir inflow I '1, then in chopped-off head power station day
By interpolation in right reservoir inflow probability distribution curve, reservoir inflow is obtained more than the critical reservoir inflow I '1Probability, be
The probability of water is abandoned in the chopped-off head power station, wherein, critical reservoir inflow I '1It is defined as：
I′1=Q1,gen+(V1,l-V1,0)/Δt
In formula, Limited Water Level of Reservoir in Flood Season correspondence storage capacity V1,lFlow Q is completely sent out with unit1,genCan be from the design data in power station
Obtain, the current time storage capacity V in power station1,0, can be obtained according to measured water level and water level-capacity curve interpolation calculation.
If being non-chopped-off head power station, need calculating first to obtain reservoir inflow R ' between critical zone, then enter in interval
By interpolation in the flow probability distribution curve of storehouse, interval reservoir inflow stochastic variable R is obtainediMore than the critical interval reservoir inflow
R ' probability, is the probability that water is abandoned in the power station, wherein, critical interval reservoir inflow R ' is defined as：
In formula, Qi,genUnit for the non-chopped-off head power station of i-stage completely sends out flow, Vi,lFor the non-chopped-off head power station news limit of i-stage
Water level correspondence storage capacity, Qi,genAnd Vi,lIt can be obtained from hydroelectric station design data, Vi,0For the non-chopped-off head power station of i-stage it is current when
The storage capacity at quarter, can be obtained according to measured water level and water level-capacity curve interpolation calculation,Calculate and obtained
Total storage outflow desired value of the upper pond in the non-chopped-off head power station of i-stage.
Step5：Since the first season regulation performance above power station, compare itself and the second season regulation performance above water
Water probability is abandoned in power station；If the first season regulation performance above hydroelectric station surplus water likelihood ratio the second season regulation performance above water power
That stands abandons water probability greatly, then is transferred to step 6；If the first season regulation performance above hydroelectric station surplus water probability is adjusted less than the second season
Performance above hydroelectric station surplus water probability is saved, then is transferred to step 11.
Step6：First season the regulation performance above hydropower station amount increase Δ E, and use with electricity determine water model calculating
Go out generating flow, be then transferred to step 7.
Step7：If average generated output is more than unit after the increase generated energy Δ E of the first season regulation performance above power station
Installed capacity, then calculate the generated energy in corresponding schedule periods according to unit installed capacity；If it is low to increase reservoir level after generated energy Δ E
In allowing minimum pool level, then according to minimum pool level inverse generated energy and its increment is allowed, step 8 is transferred to.
Step8：If there are one or more following water power of season regulation performance between two seasons regulation performance above power station
Stand, then calculate the gross generation in power station below these regulation performance successively using principle of water balance in seasons, and calculate this
The difference of the gross generation in corresponding power station, is designated as Δ E ', is transferred to step 9 in gross generation and original allocation scheme.
Step9：The generated energy in the second season modulability performance above power station is reduced into Δ E+ Δ E ', and uses fixed with electricity
Water model calculates the generating flow in the power station, is then transferred to step 10.
Step10：If in step 9, the primary electricity E in the second season regulation performance above power station2Less than Δ E+ Δ E ',
Then the hydropower station amount reduces E2, the first season regulation performance above power station and power station generated energy reduce Δ E+ Δs
E′-E2；If reducing E2The power station reservoir level is beyond peak level is allowed afterwards, then according to allowing, peak level is counter to push away generated energy, so
After be transferred to step 12.
Step11：First season regulation performance above hydropower station amount reduction Δ E, is equally calculated in the middle of two power stations
The difference Δ of the gross generation in corresponding power station in the gross generation and step 3 original allocation scheme in power station below season regulation performance
E ', and the generated energy in the second season regulation performance above power station is increased into Δ E+ Δ E ', then it is transferred to step 12.
Step12：That compares all season regulation performance above power stations two-by-two successively abandons water probability, and adjusts two seasons tune
Save the generated energy in performance above power station and middle power station.
Step13：Travel through behind all season regulation performance above power stations, recorded each season regulation performance above power station
Generated energy share { E1,E2, ', EN}。
Step14：The maximum generating watt luffing Δ E of the scheme that judgment step 13 is obtained and step 3 original allocation schememax,
If Δ Emax＞ εE, then repeat step 5 is to step 13；If Δ Emax＜ εEBut Δ E ＞ εE, then Δ E=Δ E/2, repeat step 5 are made
To step 13；If Δ Emax＜ εEAnd Δ E ＜ εE, then iterative process is terminated.
Step15：According to the generation capacity allocation scheme in each power station of last time, and the minimum water consumption in single storehouse is carried out successively
Amount, which generates electricity, to be calculated, and obtains the power generation process and generated energy in each power station.
Season regulation performance above power station is only considered inside the object function of the present invention abandons water probability, but water is flat
Weighing apparatus needs to consider all power stations when calculating.For power station below season regulation performance, according to the principle for going out storage balance
It is scheduled：When power station reservoir level is less than flood season limit level, retaining is paid the utmost attention to, if power station reservoir level is stored to flood season limit level
Still there is unnecessary water afterwards, then using unnecessary water as abandoning water process；When power station reservoir level maintains flood season limit level, if storage
Flow completely sends out flow less than its unit, then is generated electricity according to reservoir inflow；If reservoir inflow completely sends out flow more than unit, many
Residual current amount is as abandoning water-carrying capacity.
Claims (1)
1. the dispatching method of water probability pre-control scheduling model is abandoned in across basin water station group equilibrium, it is characterised in that including following step
Suddenly：
(1)：Build across basin water station group equilibrium and abandon water probability pre-control scheduling model, it is characterised in that
The definition of probability that power station is abandoned into water during [t, t+ Δ t] is hydroelectric station surplus water probability,
Maximum in each power station in across basin water station group is abandoned to water probability to minimize as object function, i.e.,：
J=min { max [Fi(Vi,n)] i=1,2 ..., S (1)
Wherein：If i-th of power station is more than season regulation performance FiWater probability, otherwise, F are abandoned for the power stationiValue is zero；
Vi,nFor i-th of season regulation performance above power station scheduling end of term water level, n represents to dispatch the end of term；S is across basin water station group
Power station sum；
The model meets following constraints：
Water balance equation：
Vi,j+1=Vi,j+(Ii,j-Qi,j)ΔtjI=1,2 ..., S；J=1,2 ..., T (2)
Electric quantity balancing equation：
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Flow coupling constraint：
Ii+1,j=Qi,j+Ri+1,jI=1,2 ..., N-1；J=1,2 ..., T (4)
Ii+1,j=Qi,j+Ri+1,jI=N+1, N+2 ..., N+M-1；J=1,2 ..., T (5)
Reservoir level is constrained：
Zi,min≤Zi,j≤Zi,maxI=1,2 ..., S；J=1,2 ..., T (6)
Storage outflow is constrained：
Qi,min≤Qi,j≤Qi,maxI=1,2 ..., S；J=1,2 ..., T (7)
Output of power station is constrained：
Ni,min≤Ni,j≤Ni,maxI=1,2 ..., S；J=1,2 ..., T (8)
Wherein, Vi,jRepresent i-th of power station jth period storage capacity；ΔtjRepresent jth Period Length；T indicates T period；EiFor
The generated energy in i-th of power station；EtFor across the gross generation of basin water station group；Ii,j,Ri,jI-th of power station is represented respectively
J periods total reservoir inflow, interval reservoir inflow；N is the power station quantity of first Hydropower Stations, and M is second step water
The power station quantity of station group, S=M+N；Zi,j,Zi,min,Zi,maxRespectively i-th power station jth period reservoir level, permission are minimum
Reservoir level and highest reservoir level；Qi,j,Qi,min,Qi,maxRespectively i-th power station jth period storage outflow, minimum and maximum
Storage outflow is limited；Ni,j,Ni,min,Ni,maxRespectively i-th power station jth period active power output, minimum and maximum it is active go out
Power restriction；
(2)：Obtain the real-time reservoir level and across basin water station group gross generation E in each power stationt；
(3)：Required according to the final convergence precision of power energy allocation, and take into account consideration Algorithm for Solving rate request, determine electricity point
With scheme iteration running orbit convergence criterion epsilonEWith initial generated energy discrete steps Δ E；
(4)：All power stations are given according to installed capacity proportional allocations by across basin water station group gross generation, initial point is formed
With scheme；
(5)：With reference to original allocation scheme, each season regulation above power station is calculated respectively and abandons water probability in the scheduling end of term；Institute
Stating the computational methods of abandoning water probability of the season regulation above power station in the scheduling end of term is：
The definition of probability that power station is abandoned into water during [t, t+ Δ t] is hydroelectric station surplus water probability；
If chopped-off head power station, then calculating first is needed to obtain critical reservoir inflow I '1, then naturally enter in chopped-off head power station
By interpolation in the flow probability distribution curve of storehouse, reservoir inflow is obtained more than the critical reservoir inflow I '1Probability, be the head
The probability of water is abandoned in level power station, wherein, critical reservoir inflow I '1It is defined as：
I′1=Q1,gen+(V1,l-V1,0)/Δt
In formula, V1,lFor Limited Water Level of Reservoir in Flood Season correspondence storage capacity, Q1,genFlow, V are completely sent out for unit1,0For the current time storehouse in power station
Hold；
If being non-chopped-off head power station, calculating first is needed to obtain reservoir inflow R ' between critical zone, then in interval storage stream
Measure in probability distribution curve by interpolation, obtain interval reservoir inflow stochastic variable RiMore than the critical interval reservoir inflow R's '
Probability, is the probability that water is abandoned in the power station, wherein, critical interval reservoir inflow R ' is defined as：
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In formula, Qi,genUnit for the non-chopped-off head power station of i-stage completely sends out flow, Vi,lPosition of restricting water supply is interrogated for the non-chopped-off head power station of i-stage
Correspondence storage capacity, Vi,0For the storage capacity at i-stage non-chopped-off head power station current time,To have calculated the obtained non-chopped-off head of i-stage
Total storage outflow desired value of the upper pond in power station；
(6)：Since the first season regulation performance above power station, compare itself and the second season regulation performance above power station
Abandon water probability；If the first season regulation performance above hydroelectric station surplus water likelihood ratio the second season regulation performance above power station is abandoned
Water probability is big, then is transferred to step (7)；If the first season regulation performance above hydroelectric station surplus water probability is less than the second season modulability
Energy above hydroelectric station surplus water probability, then be transferred to step (12)；
(7)：First season regulation performance above hydropower station amount increase Δ E, and use and determine water model with electric and calculate generating
Amount, is then transferred to step (8)；
(8)：If average generated output holds more than machine kludge after the increase generated energy Δ E of the first season regulation performance above power station
Amount, then calculate the generated energy in corresponding schedule periods according to unit installed capacity；Allow if increasing reservoir level after generated energy Δ E and being less than
Minimum pool level, then according to minimum pool level inverse generated energy and its increment is allowed, be transferred to step (9)；
(9)：If there is power station below one or more season regulation performances between two seasons regulation performance above power station, profit
Water consumption equilibrium principle calculates the gross generation in power station below these regulation performance successively in seasons, and calculates the gross generation
And the difference of the gross generation in corresponding power station in original allocation scheme, is designated as Δ E ', step (10) is transferred to；
(10)：The generated energy in the second season modulability performance above power station is reduced into Δ E+ Δ E ', and use and determines water mould with electric
Type calculates the generating flow in the power station, is then transferred to step (11)；
(11)：If in step (10), the primary electricity E in the second season regulation performance above power station2Less than Δ E+ Δ E ', then should
Hydropower station amount reduces E2, the first season regulation performance above power station and the generated energy in power station reduce Δ E+ Δ E '-E2；
If reducing E2The power station reservoir level is beyond peak level is allowed afterwards, then according to allowing, peak level is counter to push away generated energy, Ran Houzhuan
Enter step (13)；
(12)：First season regulation performance above hydropower station amount reduction Δ E, equally calculates season regulation in the middle of two power stations
The difference Δ E ' of the gross generation in corresponding power station in the gross generation and original allocation scheme in power station below performance, and by second
The generated energy increase Δ E+ Δ E ' in individual season regulation performance above power station, are then transferred to step (13)；
(13)：That compares all season regulation performance above power stations two-by-two successively abandons water probability, and adjusts two seasons regulation performance
Above power station and the generated energy in middle power station；
(14)：Travel through behind all season regulation performance above power stations, recorded the generating in each season regulation performance above power station
Share { E1,E2..., EN}；
(15)：Judge the maximum generating watt luffing Δ E of scheme and the original allocation scheme of step (4) that (14) are obtainedmaxIf, Δ
Emax＞ εE, then repeat step (6) is to step (14)；If Δ Emax＜ εEBut Δ E ＞ εE, then Δ E=Δ E/2, repeat step are made
(6) to step (14)；If Δ Emax＜ εEAnd Δ E ＜ εE, then iterative process is terminated；
(16)：According to the generation capacity allocation scheme in each power station of last time, and the minimum water consumption generating in single storehouse is carried out successively
Calculate, obtain the power generation process and generated energy in each power station.
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| CN110348599B (en) * | 2019-06-03 | 2022-02-15 | 华中科技大学 | Cross-basin hydropower station group peak shaving optimization scheduling method considering water abandoning risk |
| CN111476474B (en) * | 2020-04-01 | 2023-10-13 | 贵州黔源电力股份有限公司 | Scheduling method for reducing waste water amount of cascade hydropower station |
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