CN110472825A - A kind of step power station Real-Time Scheduling abandoning water cutting method that multi-stage scheduling mechanism is coordinated - Google Patents
A kind of step power station Real-Time Scheduling abandoning water cutting method that multi-stage scheduling mechanism is coordinated Download PDFInfo
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Abstract
The invention belongs to water power management and running field, in particular to the step power station Real-Time Scheduling that a kind of multi-stage scheduling mechanism is coordinated abandons water cutting method.Method of the invention can be at step centralized control center end, for in a few days issuable abandoning water, in view of network load balance and stable operation factor, carry out the quickly adjustment of plan in real time, improve total tune, the middle acceptance adjusted to Real-Time Scheduling scheme, or the adjustment amplitude that always tune, middle tune control suggestion Real-Time Scheduling scheme to collection is reduced, the efficiency of raising multi-stage scheduling mechanism Real-Time Scheduling coordination.
Description
Technical field
The invention belongs to water power management and running field, in particular to the step power station that a kind of multi-stage scheduling mechanism is coordinated is real
When scheduling abandon water cutting method.
Background technique
The real-time power generation dispatching of Hydropower Stations in the present invention referred within one day, when towards generation schedule a few days ago, preamble
Between in real time plan based on generation schedule adjustment, an actually complicated optimization problem.Due to solving timeliness requirement
Very high, the real-time power generation dispatching of Hydropower Stations can not usually be solved by optimization algorithm, but according to certain dispatching principle into
Plan rescheduling under the different situations of row, it is exactly one of the most common type scheduling situation that wherein step, which abandons water abatement,.(belong to region with total adjust
Grade power grid), it is middle adjust (belong to provincial power network), multi-stage scheduling mechanism, step centralized control center step power station scheduling by centralized control center
It is responsible for implementation, there is the scheduling right of suggestion in centralized control center；But in scheduling power to make decision, tune is summed up in part power station in step, remaining power station
Middle tune is returned in scheduling.The data that different traffic departments grasp and dispatching requirement difference.Total adjust grasps and is responsible for 500kV or more power transmission line
Road information and stable operation；Middle tune grasps provincial power network load and 500kV or less transmission line information, and is responsible for provincial power network
Balancing the load and stable operation；And step centralized control center is more accurate to the grasp of watermark protocol information, and is primarily upon step hair
Electric benefit and water power calculation efficiency.When operation plan a few days ago exists and abandons water risk, step centralized control center wishes to count by power generation
It draws adjustment abatement and abandons water.Due to network load balance and the limitation of transmission line of electricity ability to transmit electricity, step power station real-time generation schedule
After adjustment, middle tune must adjust the generation schedule in other power stations, and total adjust may also need to carry out the tune that other power stations are planned in real time
It is whole.Therefore, it if the abandoning water abatement plan of step suggestion is unfavorable for grid balance and stable operation, adjusts and would not connect in total reconciliation
By, or need repeatedly to coordinate just obtain multi-party all receptible plan.Since Real-Time Scheduling timeliness requires very high, complexity
Decision process often result in and can not obtain acceptable plan in many ways in acceptable time, and cause unnecessary abandonings water damage
It loses.
Summary of the invention
To solve the above problems, the present invention proposes that a kind of step power station Real-Time Scheduling that multi-stage scheduling mechanism is coordinated abandons water
Cutting method, this method can be at step centralized control center ends, in a few days issuable abandoning water, it is contemplated that network load balance
It with stable operation factor, carries out planning quickly adjustment in real time, improves total tune, the middle acceptance adjusted to Real-Time Scheduling scheme, or drop
Low total tune, the middle adjustment amplitude adjusted to collection control suggestion Real-Time Scheduling scheme, the effect that raising multi-stage scheduling mechanism Real-Time Scheduling is coordinated
Rate.
Technical solution of the present invention:
The step power station Real-Time Scheduling that a kind of multi-stage scheduling mechanism is coordinated abandons water cutting method, including always adjusts-middle tune-collection
The abandoning water abatement decision process of control multilevel coordination, the abandoning water method for reducing for taking into account power grid demand Yu power station benefit, specific as follows:
Step 1. sets in system power station sum as M, and power station number is 1,2 ..., M, if present period number is t0.Always
Tune, middle tune are according to grid operating conditions, from grid balance and stable operation angle, to all or part of self scheduling each in step
The gross capability constraint in power station is updated in real time and data is transmitted to step centralized control center, is denoted as
G=1,2 ..., G, t=t0+1, t0+2 ..., T.Wherein Φg(m) m-th of power station label in the group of power station is controlled for g-th of power output,
MgPower station number in the group of power station is controlled for g-th of power output,For power station Φg(m) it contributing in the t period, T is number of segment when in a few days,WithRespectively g-th power output control power station group t period contributes lower and upper limit.It due to abandoning water abatement constraint is controlled by collection
The scheduling suggestion initiated is held, then there is no power stations to be grouped the out-of-limit situation of gross capability under current generation schedule for default.In step water
Power station centralized control center is monitored in real time, and water risk is abandoned in identification.The reservoir section volume forecasting data updated using real-time rolling,
Hydroelectric station operation state simulation is carried out, is terminated if if not occurring in a few days to abandon water；Otherwise it is d that note, which abandons water power station number occurs,1,
d2,…,dK, K is to abandon power station number, and k-th of abandoning power station occurs abandoning water time range and beI=1,2 ...,
I, I are in a few days to abandon water fixed number；WithSegment number at the beginning and end of respectively i-th abandoning water period.Then
Go to step 2；
Step 2. abandoning water abatement is equivalent to step in step 1 and goes out under power limit and other reservoirs, power station constraint condition,
It minimizesOptimized model,Abandoning water flow for power station m in the t period, Δ t are t period hourage.
Since Real-Time Scheduling timeliness requires height, it is difficult to meet using Optimized model, abandoning water need to be carried out in step power station centralized control center
Cut down plan.Set k=1；
Step 3. sets i=1；
Step 4. is abatement time rangeInterior power station dkAbandoning water, need to increaseIn range
Power station dkGenerating flow.Wherein, t1 be period t0+Tf withBetween the last one power station dkReservoir level reach
The period of lower limit, if t0+Tf withBetween reservoir level be not up to lower limit then t1=t0+Tf, Tf is that Real-Time Scheduling operates institute
The fixed number needed, i.e. when number of segment needed for plan calculating in real time, publication.The present invention does not consider existing for the low-head hydroelectric plant of part
The problem of generating flow increases, and generated output is reduced instead, then increaseThe generating flow of reservoir can lead in range
Increase generated output is crossed to realize.Using power grid residue loadThe priority that day part increases power output is measured,
InctFor power grid t period predicted load,It contributes for power station m in the plan of t period.Power grid
The remaining load biggish period preferentially increases power output, if being according to the period after prioritizing
Segment number is tt when step 5. sets current power output adjustmentj, j=1.
Step 6. increases power station d according to setting step-lengthkIn ttjThe plan of period is contributed, while using multivariable association search
Method adjustment front and back adjacent multiple periods power output, required with meeting power output climbing and stationarity etc., if power station d in adjustmentk
The power output control group g at place is violatedThe case where constraint, then adjusts power station dkIt contributes to reach the side of the constraint
Boundary.IfInterior power station dkAbandoning water reduce, illustrate adjustment effectively, if at this time abandon water there are still return step 4 is again
Period is ranked up and determines adjustment time range；Otherwise j=j+1, ifOr power station dkIn time range
It is interior7 are then gone to step without abandoning water, otherwise goes to step 6.
If step 7. is after the adjustment of step 5-6, power station dkIn time rangeAbandoning water cannot subtract
Few or power station dkIn time rangeWithout water is abandoned, then 8 are gone to step；Otherwise 5 are gone to step.
If step 8. power station dkIn time rangeInside still there is abandoning water then to go to step 9；Otherwise 14 are gone to step；
Step 9. sets power station dkWith udkA power station immediately upstream, label are respectivelySetting is current
The upstream power station of adjustment marked as
Step 10. is by adjusting power stationTo cut down time rangeInterior power station dkAbandoning water, need to subtract
It is smallPower station in rangeGenerating flow,For upstream power stationTo lower station dkMost
When number of segment when weep is stagnant, t1 be period t0+Tf withBetween the last one power stationReservoir level reach
The period of the upper limit, if t0+Tf withBetween reservoir level be not up to the upper limit then t1=t0+Tf.Using power grid residual negative
LotusThe priority that day part increases power output is measured, whereinTo embody step
The coordination that centralized control center's proposed program balances network load.The power grid residue load lesser period preferentially reduces power output, if pressing
It is according to the period after prioritizing
Segment number is tt when step 11. sets current power output adjustmentj, j=1.
Step 12. reduces power station according to setting step-lengthIn ttjThe plan of period is contributed, while being associated with using multivariable
The power output of method adjustment front and back adjacent multiple periods of search, is required with meeting power output climbing and stationarity etc..If electric in adjustment
It standsThe power output control group g at place is violatedThe case where constraint, then adjusts power stationPower output is to reach the constraint
Boundary.If time rangeInside 14 are then gone to step without abandoning water；If otherwiseInterior power station dk
Abandoning water reduce, illustrate adjustment effectively, if at this time abandon water there are still return step 10 is again ranked up the period and determines tune
Whole time range；Otherwise j=j+1, ifGo to step 13；
Step 13.g=g+1, if10 are gone to step, otherwise goes to step 14；
Otherwise step 14.i=i+1 goes to step 15 if i≤I goes to step 4；
Otherwise step 15.k=k+1 goes to step 16 if k≤K goes to step 2.
Step 16. centralized control center will abandon the plan of water abatement while report in total reconcile and adjust, due to power station in step 1-15
Grid balance and stable constraint can only partially be embodied by being grouped out power limit and remaining load, control proposed projects for collection, total to reconcile
It is middle tune still need to carry out power grid security check examine, it is middle tune simultaneously adjustment inside the province other power stations with meet network load balance；It is total to adjust
With middle tune can the power station to own schedule plan to be finely adjusted in real time, result and reply are then sent back into centralized control center, ladder
Grade centralized control center is intended to down reach each power station, so that completing the abandoning water that a wheel multi-layer is coordinated cuts down operation.
Beneficial effects of the present invention: the comparison prior art, this method can be avoided the abandoning water abatement meter of centralized control center's suggestion
It draws excessively coarse in dispatching of power netwoks angle and is difficult to the problem of receiving, on the basis of guaranteeing real-time generation schedule quality, flexibly
Efficiently correct Cascade Reservoirs real-time generation schedule.By being assigned in the works using total tune, middle tune in real-time abandoning water abatement
Power station is grouped gross capability constraint and grid load curve, realizes that multi-stage scheduling mechanism is coordinated.
Detailed description of the invention
Fig. 1 is the power station Ma Maya section flow schematic diagram；
Fig. 2 is Dongjing hydropower station section flow schematic diagram；
Fig. 3 is the abandoning water schematic diagram by Ma Maya and Dong Qing when plan executes a few days ago；
Fig. 4 is the reservoir level schematic diagram by Ma Maya when plan executes a few days ago；
Fig. 5 is the reservoir level schematic diagram by illumination when plan executes a few days ago；
Fig. 6 is the typical load curve schematic diagram used；
Fig. 7 is Guangzhao Hydropower Station power output schematic diagram；
Fig. 8 is the power station Ma Maya power output schematic diagram；
Fig. 9 is Dongjing hydropower station power output schematic diagram；
Figure 10 is illumination and Dong's mountain valley with clumps of trees and bamboo gross capability schematic diagram.
Specific embodiment
The invention will be further described with case with reference to the accompanying drawing.
Step power station Real-Time Scheduling is the important link that short term scheduling plan is carried out, due to runoff spatial and temporal distributions and
The uncertainty of load, it is often necessary to plan be adjusted in real time, to realize the targets such as reducing abandoned water, balancing power network load.
The present invention is directed to propose a kind of abandon water cutting method with the step power station Real-Time Scheduling of stronger practicability and high efficiency, so
It is not introduced into specific optimization aim, but it is each to combine network load demand to consider that the control condition of step hydropower station and needs meet
Kind operation constraint carries out Real-Time Scheduling abandoning water and corrects.Main constraints are as follows:
1) water balance constrains
Wherein:
In formula:It is reservoir m in the reservoir storage at the beginning of period t, m3；For reservoir m in period t reservoir inflow, m3/s；L
For the total number in the power station upstream m power station；Upstream power station l flows into the flow of power station m, m in period t after when to consider stagnant3/s；Section flow for power station m in period t, m3/s；For storage outflow of the reservoir m in period t, m3/s；Point
It is not generating flow of the reservoir m in period t, abandons water flow, m3/s；ΔtFor the hourage of t-th of period；1≤m≤M, M are
Power station sum；1≤t≤T, T are in a few days period sum.
2) storage capacity constrains
In formula:Respectively power station m is in the storage capacity upper and lower bound at the beginning of the t period, m3。
3) generating flow limits
In formula:For the generating flow upper limit of power station m, m3/s。
4) storage outflow limits
In formula:Respectively power station m is in t period storage outflow upper and lower bound, m3/s。
5) output of power station limits
In formula:Power output and its upper and lower bound of the respectively power station m in the t period, MW.
6) output of power station climbing limitation
In formula:It goes up and down and limits in adjacent time interval maximum output for power station m, MW.
7) vibrating area constrains
In formula:Upper and lower bound of the respectively power station m in k-th of t period power output vibrating area, MW.
Consider above-mentioned constraint condition, power output adjustment is carried out to cut down abandoning water to real-time plan.Power grid is considered when adjustment power output
Balancing the load and stable service requirement, the preferential power output for increasing the system spare load larger period, the preferential system spare that reduces are born
The power output of lotus smaller period, is based on the criterion, and primary complete Hydropower Stations Real-Time Scheduling is abandoned water and cut down according to following step
Suddenly it is achieved:
Step 1. sets present period as t0, and total tune, middle tune are according to grid operating conditions, from grid balance and stable operation angle
Degree is updated the gross capability constraint in all or part of power station of self scheduling each in step in real time and data is transmitted to step
Centralized control center is denoted as
In formula: g is power output control power station group #, and g=1,2 ..., G, G is main switching station group number；T=t0+1, t0+2 ...,
T；Φg(m) m-th of power station label in the group of power station is controlled for g-th of power output；MgPower stations number in the group of power station is controlled for g-th of power output
Mesh；For power station Φg(m) it contributes in the t period, MW；WithIt contributes for g-th of power output control power station group t period upper and lower
Limit, MW.
It is the scheduling suggestion initiated by collection control end due to abandoning water abatement constraint, then default is not present under current generation schedule
Power station is grouped the out-of-limit situation of gross capability.It is short to step power station using the real-time reservoir section volume forecasting data for rolling and updating
Phase generation schedule carries out operating status simulation, takes following measures according to operation result:
A) terminate in schedule periods without water is abandoned；
B) there is abandoning water in schedule periods.It is d that note, which abandons water power station number occurs,1,d2,…,dK, K is the power stations number for occurring to abandon water
Mesh；K-th of abandoning power station occurs to abandon water time rangeI is in a few days to abandon water fixed number；The respectively i-th continuous beginning for abandoning the water period, finish number.Go to step 2.
Step 2. carries out abandoning water abatement plan in step power station centralized control center.Set k=1.
Step 3. sets i=1.
Step 4. is to cut down power station dkIn time rangeAbandoning water, adjust power station dkItself contributed
Journey, adjusting range and sequence are as follows:
Segment limit when a) adjusting.To cut down time rangeInterior abandoning water must increaseRange
Interior power station dkGenerating flow, wherein t1 be period t0+Tf withBetween the last one power station dkReservoir level reach
To the period of lower limit, if t0+Tf withBetween reservoir level be not up to lower limit then t1=t0+Tf, Tf is Real-Time Scheduling operation
Required fixed number, the when number of segment that both plan calculated in real time, publication is required；
B) adjustment period sequence.The present invention does not consider that generating flow existing for the low-head hydroelectric plant of part increases, generated output
The problem of reducing instead then increasesThe generating flow of reservoir can be realized by increasing generated output in range.
Power grid day part residue load, c are calculated using formula (11)t' biggish period preferentially increases power output, is arranged according to priority
Period after arrangement is
In formula: ct、c′tRespectively power grid t period predicted load and remaining load, MW.
Step 5. sets current power output adjustment period serial number ttj, j=1.
Step 6. increases power station d according to setting step-lengthkIn ttjThe plan of period is contributed, while using multivariable association search
Method adjustment front and back adjacent multiple periods power output, required with meeting power output climbing and stationarity etc..If power station d in adjustmentk
The power output control group g at place is violatedThe case where constraint, then adjusts power station dkIt contributes to reach the side of the constraint
Boundary.After power output increases:
a)Interior power station dkAbandoning water reduce.Illustrate the step adjustment effectively, if at this time abandon water there are still,
Return step 4 redefines adjustment time range and is ranked up to the adjustment period；
b)Interior power station dkAbandoning water do not reduce.Illustrate that step adjustment is invalid, cancels and this time adjusting, enable
J=j+1, ifOr power station dkIn time range7 are then gone to step without abandoning water, is otherwise turned
Step 6.
If step 7. is after the adjustment of step 5-6, power station dkIn time rangeAbandoning water cannot
Reduction or power station dkIn time rangeWithout water is abandoned, then 8 are gone to step；Otherwise 5 are gone to step.
If step 8. power station dkIn time rangeStill there is abandoning water then to go to step 9；Otherwise 14 are gone to step.
Step 9. assumes power station dkHaveA power station immediately upstream, label are respectivelySetting
The upstream power station currently adjusted marked as
Step 10. is further to cut down power station dkIn time rangeAbandoning water, adjust power station dkUpstream
Power stationPower output process, adjusting range and sequence it is as follows:
Segment limit when a) adjusting.To cut down time rangeInterior power station dkAbandoning water, must reducePower station in rangeGenerating flow, whereinFor upstream power stationTo lower station dk
The stagnant constantly number of segment of minimum water flow, t1 be period t0+Tf withBetween the last one power stationReservoir level reach
To the period of the upper limit, if t0+Tf withBetween reservoir level be not up to the upper limit then t1=t0+Tf；
B) adjustment period sequence.Power grid day part residue load, c are calculated using formula (11)t' lesser period preferentially subtracts
Small power output, setting are according to the period after prioritizing
Step 11. sets current power output adjustment period serial number ttj, j=1.
Step 12. reduces power station according to setting step-lengthIn ttjThe plan of period is contributed, while being searched using multivariable association
The power output of method adjustment front and back adjacent multiple periods of rope, is required with meeting power output climbing and stationarity etc..If power station in adjustmentThe power output control group g at place is violatedThe case where constraint, then adjusts power stationPower output is to reach the constraint
Boundary.After power output reduces:
a)It is interior without abandon water.Go to step 14；
b)Interior power station dkAbandoning water reduce.Illustrate the step adjustment effectively, if at this time abandon water there are still,
Return step 10 redefines adjustment time range and is ranked up to the adjustment period；
c)Interior power station dkAbandoning water do not reduce.Illustrate that step adjustment is invalid, cancels and this time adjusting, enable
J=j+1, ifGo to step 13.
Step 13.g=g+1, if10 are gone to step, otherwise goes to step 14.
Otherwise step 14.i=i+1 goes to step 15 if i≤I goes to step 4.
Otherwise step 15.k=k+1 goes to step 16 if k≤K goes to step 2.
Step 16. centralized control center will abandon the plan of water abatement while report in total reconcile and adjust, due to power station in abovementioned steps
Grid balance and stable constraint can only partially be embodied by being grouped out power limit and remaining load, control proposed projects for collection, total to reconcile
It is middle tune still need to carry out power grid security check examine, it is middle tune simultaneously adjustment inside the province other power stations with meet network load balance；It is total to adjust
With middle tune can the power station to own schedule plan to be finely adjusted in real time, result and reply are then sent back into centralized control center, ladder
Grade centralized control center is intended to down reach each power station, so that completing the abandoning water that a wheel multi-layer is coordinated cuts down operation.
It now always adjusted by south electric network, adjusted in Guizhou Power Grid, for Bei Panjiang step centralized control center coordination Real-Time Scheduling, carried out
The method of the present invention verifying.Northern disk river step power station includes kind mud slope, tetra- illumination, Ma Maya, Dong Qing water from downstream is above swum over to
Power station, wherein tune degree in Guizhou Power Grid, illumination (year adjusting), Dong Qing (day are returned in kind mud slope (day adjusting), Ma Maya (day adjusting)
Adjust) by the total tune degree of south electric network.Since four power stations scheduling permission of northern disk river step is different, it is especially total adjust, in
The power station of tune degree distributes alternately, and three in addition to illumination reservoir capacity is smaller, when total Real-Time Scheduling plan adjusted with middle tune
Be easy to that unmatched situation occurs, the plan of abandoning water at this time abatement not only cannot utmostly reducing abandoned water, may make instead
Full, emptying is frequently stored at reservoir, so that plan can not execute, and has the possibility for increasing and abandoning water.Bei Panjiang step centralized control center pair
Abandon what water problems was paid close attention to the most, while the grasp of watershed watermark protocol information is the most accurate and comprehensive, therefore by northern disk Jiang Tijiji
It is the most suitable that abandoning water abatement scheduling scheme is initiated at control center.And can not to grasp completely power grid stable for Bei Panjiang step centralized control center
Information, abandon water abatement scheduling scheme must it is total adjust, in assign fixed stable constraint condition under formulated, and by always adjusting pair
Illumination, Dong Qing, the middle Real-Time Scheduling plan adjusted to kind mud slope, Ma Maya carries out Security Checking and network load balances.It adopts below
It is abandoned water with carry out Real-Time Scheduling of the method for the present invention to the northern step hydropower station Pan Jiang and is cut down adjustment, and carried out point in conjunction with analog result
Analysis.
Application example is constructed based on doomsday step operating condition.Section flow is used with the plan a few days ago in Fig. 1-2
The formulation planned a few days ago, the 13rd period by updating rainfall runoff forecasting, finds this day in 3:00 AM, i.e. Fig. 1-2
The section flow of two daily regulation reservoirs of later period Ma Maya and Dong's mountain valley with clumps of trees and bamboo dramatically increases, such as the real-time amendment section flow in Fig. 1-2
It is shown.At this point, will occur largely abandoning water in day end, the possibility of Ma Maya and Dong Qing abandon water if still running according to plan a few days ago
As shown in figure 3, shown in the reservoir level operational process and Fig. 4-5 of Ma Maya and Dong Qing.The control of step collection starts to initiate to abandon at 3 points thus
Water plan for adjustment.Water method for reducing (not considering output of power station limitation and network load factor) and side of the present invention are abandoned using conventional
Method, the priority judgment basis of power output increase and decrease using the typical load curve of Fig. 6 as the period, the result for carrying out abandoning water abatement is as schemed
Shown in 7-10, wherein Fig. 7-9 is respectively the power output process of illumination, three power stations Ma Maya and Dong's mountain valley with clumps of trees and bamboo, and Figure 10 is total light modulation photograph, Dong
The gross capability process in two power stations of the mountain valley with clumps of trees and bamboo.Figure 10, the two gross capability are shown in the illumination and the power station the Dong Qing gross capability upper limit used in calculating
Lower limit is set as 480MW, and distributing to two power stations is respectively illumination 260MW, Dong Qing 220MW；It is apt to mud slope and Ma Maya electricity in this example
Stand two middle tune pipe power stations go out power limit not to calculated result formed substantial effect.
When using conventional abandoning water method for reducing, grid load curve specific value is not considered, does not consider that single station, multistation go out
Power limit, only according to the load valley period preferentially reduce power output, peak period preferentially increase power output principle carry out abandon water abatement.
Due to lack multi-stage scheduling mechanism coordination, the load valley of use, peak period be it is fixed, not with different load curves
And change.By calculated result as it can be seen that Dong Qing significantly increases power output (such as Fig. 9) before the 25th period reduces reservoir level, thus
Abatement abandons water.The power station Ma Maya adjusts reduced abandoning water very since reservoir capacity is smaller and reservoir inflow is larger, by itself
It is few, thus its plan in real time is not much different (Fig. 8) with plan a few days ago.The abandoning water of Ma Maya relies primarily on upstream light and exists according to power station
Power output between the 13-29 period, which reduces, realizes (Fig. 7), and due to not considering illumination power output lower limit, the power output of illumination is in the 13-29 period
Lower than lower limit value 260MW.Simultaneously because not limiting in view of total light modulation according to two power station gross capabilities of Dong's mountain valley with clumps of trees and bamboo, two station gross capabilities exist
It is more than limitation (Figure 10) between the 13-25 period.As it can be seen that cannot be connect by total tune using the result that conventional step abandons water method for reducing
By and face adjustment, output of power station is always adjusted in and the power station Ma Maya due to also clipping a middle tune pipe between illumination and Dong's mountain valley with clumps of trees and bamboo
Adjustment may be unfavorable for the abandoning water adjustment of Ma Maya, it is therefore desirable to which tripartite repeatedly coordinates, and has and loses scheduling scheme modification opportunity
It may.
In the calculated result of the method for the present invention, Dong Qing increases power output degree before the 25th period and reduces compared with conventional method
(such as Fig. 9), illumination, the limitation of Dong's mountain valley with clumps of trees and bamboo gross capability meet, and the abandoning water of illumination at this time is not gone out as in conventional method by itself
Power adjustment is all eliminated.Remaining Dong Qing abandons the abandoning water of water and Ma Maya, mainly by upstream light according to power station the 34-41 period it
Between power output reduce realize (Fig. 7), illumination at this time contribute lower limit meet.The period that Dong Qing increases power output is according to load curve
(Fig. 6) deducts step and has issued the remaining load maximum period after power, and after the illumination reduction period allows for out power limit
The remaining load minimum period: although period 13-25 more preferentially reduces power output according to remaining load, due to output of power station lower limit
Limitation causes the period that cannot reduce power output, and the period that its second priority reduces power output is the 34-41 period.Therefore, using mentioning
Abandoning water method for reducing out, can meet single station of dispatching of power netwoks department, multistation goes out power limit simultaneously, and in strict accordance with remaining load
Big preferential plus power output, the small principle for preferentially subtracting power output of remaining load carry out real-time generation schedule formulation.Since its result embodies
Ground grid balance and stable requirement are easy to reduce the process of intermediate coordination to adjust in always reconciling and receiving, improve Real-Time Scheduling
The efficiency of decision-making.
The above analysis, the abandoning water abatement that method of the invention can be avoided centralized control center's suggestion are planned in dispatching of power netwoks
Angle is excessively coarse and is difficult to the problem of receiving, and on the basis of guaranteeing real-time generation schedule quality, amendment is terraced flexibly and efficiently
Grade multi-reservoir real-time generation schedule.By total out using the power station grouping always adjusted, middle tune is assigned in the works in abandoning water abatement in real time
Force constraint and grid load curve realize that multi-stage scheduling mechanism is coordinated.
Claims (2)
1. the step power station Real-Time Scheduling that a kind of multi-stage scheduling mechanism is coordinated abandons water cutting method, which is characterized in that specifically such as
Under:
Step 1. sets in system power station sum as M, and power station number is 1,2 ..., M, if present period number is t0；It is total adjust, in
It adjusts according to grid operating conditions, from grid balance and stable operation angle, to all or part of power station of self scheduling each in step
Gross capability constraint be updated in real time and data be transmitted to step centralized control center, be denoted asG=
1,2 ..., G, t=t0+1, t0+2 ..., T；Wherein Φg(m) m-th of power station label in the group of power station, M are controlled for g-th of power outputgFor
Power station number in g-th of power output control power station group,For power station Φg(m) it contributing in the t period, T is number of segment when in a few days,
WithRespectively g-th power output control power station group t period contributes lower and upper limit；It is that end is controlled by collection due to abandoning water abatement constraint
The scheduling suggestion of initiation, then there is no power stations to be grouped the out-of-limit situation of gross capability under current generation schedule for default；In cascade hydropower
Centralized control center of standing is monitored in real time, and water risk is abandoned in identification；The reservoir section volume forecasting data updated using real-time rolling, into
Row hydroelectric station operation state simulation terminates if if not occurring in a few days to abandon water；Otherwise it is d that note, which abandons water power station number occurs,1,
d2,…,dK, K is to abandon power station number, and k-th of abandoning power station occurs abandoning water time range and beI=1,2 ...,
I, I are in a few days to abandon water fixed number；WithSegment number at the beginning and end of respectively i-th abandoning water period；Then
Go to step 2；
Step 2. abandoning water abatement is equivalent to step in step 1 and goes out under power limit and other reservoirs, power station constraint condition, minimum
ChangeOptimized model,Abandoning water flow for power station m in the t period, Δ t are t period hourage；In ladder
Grade power station centralized control center carries out abandoning water abatement plan；Set k=1；
Step 3. sets i=1；
Step 4. is abatement time rangeInterior power station dkAbandoning water, increasePower station in range
dkGenerating flow；Wherein, t1 be period t0+Tf withBetween the last one power station dkReservoir level reach lower limit
Period, if t0+Tf withBetween reservoir level be not up to lower limit then t1=t0+Tf, when Tf is needed for Real-Time Scheduling operation
Number of segment mesh；The problem of generating flow existing for the low-head hydroelectric plant of part increases, and generated output is reduced instead is not considered, then is increasedThe generating flow of reservoir is realized by increasing generated output in range；Using power grid residue loadThe priority that day part increases power output is measured, whereinctFor power grid t period load
Predicted value,It contributes for power station m in the plan of t period；The power grid residue load biggish period preferentially increases power output, if according to
Period after prioritizing is
Segment number is tt when step 5. sets current power output adjustmentj, j=1；
Step 6. increases power station d according to setting step-lengthkIn ttjThe plan of period is contributed, while using the side of multivariable association search
The power output of method adjustment front and back adjacent multiple periods, to meet power output climbing and stationarity requirement, if power station d in adjustmentkPlace
The control group g that contributes is violatedThe case where constraint, then adjusts power station dkIt contributes to reach the boundary of the constraint；IfInterior power station dkAbandoning water reduce, illustrate adjustment effectively, there are still, return steps 4 again clock synchronization if abandoning water at this time
Section is ranked up and determines adjustment time range；Otherwise j=j+1, ifOr power station dkIn time range7 are then gone to step without abandoning water, otherwise goes to step 6；
If step 7. is after the adjustment of step 5-6, power station dkIn time rangeAbandoning water not can be reduced,
Or power station dkIn time rangeWithout water is abandoned, then 8 are gone to step；Otherwise 5 are gone to step；
If step 8. power station dkIn time rangeInside still there is abandoning water then to go to step 9；Otherwise 14 are gone to step；
Step 9. sets power station dkHaveA power station immediately upstream, label are respectivelyThe current adjustment of setting
Upstream power station marked as
Step 10. is by adjusting power stationTo cut down time rangeInterior power station dkAbandoning water, reducePower station in rangeGenerating flow,For upstream power stationTo lower station dkMinimum
When number of segment when water flow is stagnant, t1 be period t0+Tf withBetween the last one power stationReservoir level reach
The period of limit, if t0+Tf withBetween reservoir level be not up to the upper limit then t1=t0+Tf；Using power grid residue loadThe priority that day part increases power output is measured, whereinTo embody step collection
The coordination that control center proposed program balances network load；The power grid residue load lesser period preferentially reduces power output, if according to
Period after prioritizing is
Segment number is tt when step 11. sets current power output adjustmentj, j=1；
Step 12. reduces power station according to setting step-lengthIn ttjThe plan of period is contributed, while using multivariable association search
The power output of method adjustment front and back adjacent multiple periods, to meet power output climbing and stationarity requirement；If power station in adjustmentPlace
Power output control group g violateThe case where constraint, then adjusts power stationIt contributes to reach the boundary of the constraint；
If time rangeInside 14 are then gone to step without abandoning water；If otherwiseInterior power station dkAbandoning water subtract
It is few, illustrate adjustment effectively, there are still return step 10 is again ranked up the period and determines adjustment time model if abandoning water at this time
It encloses；Otherwise j=j+1, ifGo to step 13；
Step 13.g=g+1, if10 are gone to step, otherwise goes to step 14；
Otherwise step 14.i=i+1 goes to step 15 if i≤I goes to step 4；
Otherwise step 15.k=k+1 goes to step 16 if k≤K goes to step 2；
Step 16. centralized control center will abandon the plan of water abatement while report in total reconcile and adjust, since power station is grouped in step 1-15
Power limit and remaining load can only partially embody grid balance and stable constraint out, control proposed projects for collection, adjust in total reconciliation
Still need to carry out power grid security check examine, it is middle tune simultaneously adjustment inside the province other power stations with meet network load balance；In total reconciliation
Adjust can the power station to own schedule plan to be finely adjusted in real time, result and reply are then sent back into centralized control center, step collection
Control center is intended to down reach each power station, so that completing the abandoning water that a wheel multi-layer is coordinated cuts down operation.
2. the step power station Real-Time Scheduling that a kind of multi-stage scheduling mechanism according to claim 1 is coordinated abandons water reduction side
Method, which is characterized in that constraint condition is specific as follows:
1) water balance constrains
Wherein:
In formula:It is reservoir m in the reservoir storage at the beginning of period t, m3；For reservoir m in period t reservoir inflow, m3/s；L is electricity
It stands the total number in the upstream m power station；Upstream power station l flows into the flow of power station m, m in period t after when to consider stagnant3/s；
Section flow for power station m in period t, m3/s；For storage outflow of the reservoir m in period t, m3/s；Respectively
It is generating flow of the reservoir m in period t, abandons water flow, m3/s；ΔtFor the hourage of t-th of period；1≤m≤M, M are electricity
It stands sum；1≤t≤T, T are in a few days period sum；
2) storage capacity constrains
In formula:Respectively power station m is in the storage capacity upper and lower bound at the beginning of the t period, m3；
3) generating flow limits
In formula:For the generating flow upper limit of power station m, m3/s；
4) storage outflow limits
In formula:Respectively power station m is in t period storage outflow upper and lower bound, m3/s；
5) output of power station limits
In formula:Power output and its upper and lower bound of the respectively power station m in the t period, MW；
6) output of power station climbing limitation
In formula:It goes up and down and limits in adjacent time interval maximum output for power station m, MW；
7) vibrating area constrains
In formula:Upper and lower bound of the respectively power station m in k-th of t period power output vibrating area, MW.
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