CN107274302B - It is a kind of transprovincially to interconnect the long-term combined adjusting peak dispatching method of GROUP OF HYDROPOWER STATIONS - Google Patents
It is a kind of transprovincially to interconnect the long-term combined adjusting peak dispatching method of GROUP OF HYDROPOWER STATIONS Download PDFInfo
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Abstract
The present invention relates to hydroelectric generation scheduling fields, disclose a kind of interconnection long-term combined adjusting peak dispatching method of GROUP OF HYDROPOWER STATIONS transprovincially.Technical solution is：GROUP OF HYDROPOWER STATIONS Model for Multi-Objective Optimization is established with generated energy maximum and the typical day minimum target of peak-valley ratio of withered phase, utilize regulation performance difference between water regime and power supply between area basin transprovincially, power station is grouped by residing output section, coordinates power station computation sequence stage by stage；Send receiving end GROUP OF HYDROPOWER STATIONS optimal water level process using successive optimization and the optimization of Dynamic Programming Approach by inchmeal coupling algorithm, and restriction reconstruct sending end is conveyed according to DC link transprovincially and faces load, typical daily output process is determined with gradually Emergency Control Strategy, and the long-term power energy allocation scheme of GROUP OF HYDROPOWER STATIONS and typical day power process of each moon are obtained by iteration optimization.The present invention, which can make full use of, send receiving end GROUP OF HYDROPOWER STATIONS compensation adjustment characteristic, the long-term electrical demand of significant response power grid and short-term peak regulation demand, meets Huge Power Station transregional power transmission scheduling actual needs transprovincially.
Description
Technical field
The present invention relates to hydroelectric generation scheduling fields, more particularly to a kind of transprovincially to interconnect the long-term combined adjusting peak tune of GROUP OF HYDROPOWER STATIONS
Degree method.
Background technology
With generating electricity by way of merging two or more grid systems in Jinsha jiang River, Yalongjiang River, the especially big basin Huge Power Station cluster in the Lancang River, China's transprovincially area's water
Electric conveying scale drastically expands, and the transportable ability of maximum is more than 68,000,000 kW, and so extensive feed-in water power is to receiving end power grid
Influence significantly increase, and with extremely complex interconnection hydroelectric system transprovincially is constituted by water power in end regions, with collaboration
Meet the supply of receiving end grid power and the complex tasks demand such as Load Regulation, to receiving end grid dispatching management bring new challenge and
Problem.On the one hand, these GROUP OF HYDROPOWER STATIONSs cover multiple provinces, in the hydrology, geography, meteorology etc. there are greatest differences, and water
Library series and parallel is simultaneously deposited, and regulation performance is various, and hydraulic connection intercouples with power communication, is considerably increased modeling and is solved hardly possible
Degree；On the other hand, transprovincially interconnection water power scheduling need take into account send by the power grid at both ends and power station operation control require, how from
While body maximizing the benefits, the long-term electricity coordination of power grid and short term regulatory demand are taken into account, is transprovincially to interconnect hydroelectric system
Need the new problem solved.
Research in relation to the scheduling of trans-regional water power transprovincially with extra-high voltage direct-current water power convey scale it is continuous increase by
More concerns, part research are directed to single basin step power transmission problem, such as Hongsuihe River mainstream power transmission Guangdong and Guangxi transprovincially, gold
The downstreams Sha Jiang power transmission Guangdong, Zhejiang etc., having carried out water power, transprovincially peak regulating method is studied in short term；It is another to there are individual researchs to be directed to direct current water
Electricity has carried out net province two-stage and has coordinated peak regulating method research in short term in the electric power distribution problem between by the multiple provincial power networks of end regions,
These research reports primarily focus on direct water saved by the net in end regions coordinate or single basin step it is short-term transprovincially
Peak regulation is dispatched, and rarely has research uniformly to account for sending end and receiving end power supply, is more not directed to long and short phase Multiple Time Scales coupling
Complicated dispatching requirement, this problem are the technical bottlenecks that water power a wide range of transport arrangement in China's faces, and there is an urgent need for applicable theory sides
Method and technology.Achievement of the present invention relies on Nsfc Major plan emphasis to support project (91547201) and country certainly
Right science fund general project (51579029), it is the back of the body to coordinate and optimize problem for a long time with the extra-high force feed receiving end GROUP OF HYDROPOWER STATIONS in small stream-Zhejiang
A kind of long-term combined adjusting peak scheduling of the GROUP OF HYDROPOWER STATIONS of interconnection transprovincially of value has been invented with stronger practical value and be widely popularized to scape
Method.
Invention content
The long-term combined adjusting peak dispatching method of GROUP OF HYDROPOWER STATIONS is transprovincially interconnected the technical problem to be solved in the present invention is to provide a kind of,
This method can take into account the long-term electrical demand and the peak regulation demand of typical day of electric system, and electric system is alleviated from long-term angle
Short-term peak regulation pressure, while according to the Tendency analysis of the short-term peak regulation index guidance realization long-term electricity of water power of power grid, to promote water
The formulation efficiency and accuracy rate of power station shot and long term scheduling scheme.
The technical scheme is that：
It is a kind of transprovincially to interconnect the long-term combined adjusting peak dispatching method of GROUP OF HYDROPOWER STATIONS, include the following steps：
Step 1. read basic data, initialize calculating parameter, including transprovincially interconnect power station service condition constraint and
Control condition constraint, transregional direct water Transmission constraints, by calculating such as power grid monthly average load, long-term typical daily loads
Parameter；
Step 2. is established and transprovincially interconnects the long-term combined adjusting peak Optimal Operation Model of GROUP OF HYDROPOWER STATIONS, and the model is with generated energy maximum
With the typical day minimum optimization aim of peak regulation peak-valley ratio of withered phase；
Step 3. is up to target with conventional power generation usage amount and send receiving end GROUP OF HYDROPOWER STATIONS to optimize calculating to transprovincially interconnecting, and generates
Model initial solution, while recording the maximum value R of each typical case moon, residue load peak-valley ratio day of power grid withered phase at this time0；
Withered phase minimum load peak-valley ratio constraint R=R is arranged in step 4.0-0.01；
Step 5. enables iterations k=0.
Step 6. enables calculation interval t=1, and it is hop count when schedule periods are total to define T；
Step 7. will send receiving end power station to be grouped according to affiliated basin, and meter total number packets are N groups；
If step 8. k>0；Power station two benches water level process is judged whether there is to change.If so, then resetting flow search
Step-length goes to step 9.If nothing enables t=t+1, if t>T goes to step 15, otherwise repeats this step；
Step 9. judges whether the power station for participating in calculating is in flood season, if so, preferentially being calculated, otherwise, in flood
It is calculated again after phase power optimization.The power station group sequence for calculating highest priority is enabled to be defined as n=0；
Step 10. under given goal condition, the constraint of processing peak-valley ratio, transregional direct water Transmission constraints, with
And other conventional hydropower station constraintss, using POA-DDDP algorithm search model two benches optimal flux processes；Simultaneously with by
The secondary two stage typical daily output process of the processing of cutting load method power station t and t+1, calculates the typical day minimum load peak-valley difference of two benches
Rate RtAnd Rt+1；
Step 11. enables n=n+1, if n<N, then repeatedly step 10, otherwise goes to step 12；
Step 12. repeats step 9-11, judges whether power station water level process has change in the adjacent group of optimizing result twice, if
Nothing then goes to step 13, otherwise, repeats step 12；
Step 13. reduces flow and searches for progress, judges whether flow search progress meets schedule requirement at this time, if so, turning
Step 9；Otherwise, 14 are gone to step；
Step 14. enables t=t+1, if t>T then enables k=k+1, goes to step 15；Otherwise, 8 are gone to step；
Step 15. judges whether each power station water level process epicycle iteration has change, if nothing, goes to step 16；Otherwise, it goes to step
6.；
Step 16. counts typical day maximum peak-valley ratio R in each moon in withered month phasemax=max { Rt′, t ' includes all withered phases
Month；
If step 17. Rmax<R then exports this and calculates scheduling scheme and withered phase minimum load peak-valley ratio binding occurrence R, makees
For a feasible program, and go to step 4；Otherwise it calculates and terminates.
The prior art is compared, implements technical scheme of the present invention, it can be achieved that following advantageous effect：Method proposed by the present invention
Transprovincially power transmission GROUP OF HYDROPOWER STATIONS can be made full use of to send the power station water regime difference by both ends, GROUP OF HYDROPOWER STATIONS transprovincially is effectively played and mend
Scheduling effect is repaid, while taking into account the long-term Utility of Energy of hydroelectric system and receiving end power balance demand.And low water is fully considered
Phase power grid typical case daily load characteristic reduces the typical lotus peak-valley ratio more than day of power grid, has while coordinated allocation long-term electricity
Effect improves the generated energy and the long-term benefit of peak regulation of power grid of hydroelectric system.And because of the GROUP OF HYDROPOWER STATIONS coordination side of the invention transprovincially carried
Method influences very little to power transmission operation pattern of plant outside existing area, is the transregional conveying extensive transprovincially of China's extra-high voltage direct-current water power
Provide a kind of technological means of highly effective.
Description of the drawings
Fig. 1 is the withered phase power station typical case daily output interval diagram of flood；
Fig. 2 is to send receiving end power station hierarchy optimization sequential schematic；
Fig. 3 is POA-DDDP two benches subproblem search process schematic diagrames；(a) it is the optimizing stage first round, is (b) second
Take turns the optimizing stage；
Fig. 4 is 50% typical section flow drag multi-scheme peak-valley ratio-generated energy distribution situation figure；
Fig. 5 is each moon generated energy comparison diagram of typical scenario GROUP OF HYDROPOWER STATIONS；
Fig. 6 is that scheduling scheme and actual schedule scheme output and water level process are crossed in institute's extracting method typical scenario small stream Lip river of the present invention
Comparison diagram；(a) it is output process comparison diagram, is (b) water level process comparison diagram；
Fig. 7 is institute's extracting method typical scenario of the present invention beach hole scheduling scheme and actual schedule scheme output and water level process pair
Than figure；(a) it is output process comparison diagram, is (b) water level process comparison diagram.
Wherein：R in Fig. 5, Fig. 6, Fig. 7 indicates peak-valley ratio.
Specific implementation mode
The long-term combined adjusting peak dispatching method of GROUP OF HYDROPOWER STATIONS is transprovincially interconnected the present invention relates to a kind of, below in conjunction with attached drawing and example
The invention will be further described.
Transprovincially interconnection GROUP OF HYDROPOWER STATIONS Long-term Optimal Dispatch plans in establishment that process is by power grid shot and long term part throttle characteristics, transprovincially
The factors such as transmission line of electricity constrains in short term, power station regimen, unit maintenance influence.The method of the present invention mainly solves four aspects
Critical issue：First, how to establish interconnection GROUP OF HYDROPOWER STATIONS joint optimal operation model transprovincially；Second is that how using transprovincially interconnecting
The withered phase difference of GROUP OF HYDROPOWER STATIONS flood, plays the scheduling characteristic in power station under different hydrologic regimes；Third, how to solve power transmission electricity transprovincially
Stand and its typical day constraint of transmission line of electricity, processing power transmission power station typical case's daily output problem, fourth, how effective search GROUP OF HYDROPOWER STATIONS
Optimal water level process illustrates four aspect solution to the problem individually below.
(a) GROUP OF HYDROPOWER STATIONS joint optimal operation model is transprovincially interconnected
In general, the target of the long-term generation optimization scheduling of GROUP OF HYDROPOWER STATIONS is using year as dispatching cycle, the moon or ten days are to calculate
Period, by determining that the optimal mean monthly stage process in each power station in schedule periods realizes that long-term electricity optimizes, scheduling result relates to
And the on-road efficiency of power station and power grid.Compared with conventional hydropower scheduling model, transprovincially power transmission water power and receiving end power grid GROUP OF HYDROPOWER STATIONS
Scheduling is on the basis of considering that sending end GROUP OF HYDROPOWER STATIONS runs control condition, it is also necessary to take into account direct water interconnection complexity transmission of electricity limit
Beam is restricted, the time and space usage of model is even closer, solves difficulty bigger.The model that the present invention constructs is using generated energy maximum and withered
Water phase typical case's day minimum target of residue load peak-valley ratio, to take into account the tune of GROUP OF HYDROPOWER STATIONS long-term electricity optimization and short-term peak regulation
Degree demand.Object function indicates as follows respectively：
Generated energy is maximum：It is up to target with total hydroelectric system generated energy in schedule periods.
The withered phase, typical day residue load peak-valley ratio was minimum：The peak regulation that peak-valley ratio embodies electric system day internal loading is difficult
Degree, if remaining load peak-valley ratio reduces, the peak regulation pressure that other power supplys such as thermoelectricity face load is smaller；Otherwise the tune of power supply
Peak pressure power is bigger.
In formula：F1Indicate the maximum target of generated energy, F2Indicate the mesh of typical day residue load peak-valley ratio minimum of withered phase
Mark, m indicate that power station number, M indicate the power station for participating in calculating sum, M1Indicate the power station inside the province for participating in calculating sum, M2Indicate ginseng
With the sum of power station outside the province of calculating, t indicates that scheduling slot number, Δ t indicate that the period of long-term dispatch, T indicate entire scheduling week
Phase, T2Indicate that the set of withered month phase in water power dispatching cycle, i indicate that segment labeling when typical day, I indicate typical period day overall length
Degree, Cday indicate power grid typical case's daily load, unit MW.
Long-term Hydropower Station constrains
(1) last restriction of water level：Zm,T=Z'm (3)
(2) water balance constrains：Vm,t+1=Vm,t+(Qm,t-qm,t-qdm,t)Δt (4)
In formula:
(3) storage outflow constrains：
(4) generating flow constrains：
(5) reservoir level constrains：
(6) output of power station constrains：
(7) aerial drainage equipment maximum conveyance capacity constrains：
In formula：Vm,tGross reservoir capacitys of the expression power station m in period t；Qm,tIndicate power station m in the reservoir inflow of period t, qm,t
Indicate power station m in the generating flow of period t, the power stations number immediately upstream of K expressions power station m, k expressions upstream power station number, Inm,t
Indicate power station m in the section flow of period t, Sk,tIndicate k-th of power station m storage outflow of the power station in period t immediately upstream；
qdm,tIndicate that power station m abandons water flow in period t；Δ t indicates t period hourages；Zm,TIndicate power station m in dispatching cycle Mo
Water level；The generating flow upper limits of the expression power station m in period t；Sm,tIndicate power station m period t storage outflow,WithStorage outflow bounds of the expression power station m in period t respectively；Zm,tIndicate that power station m goes out reservoir level in period t,WithReservoir level bounds of the expression power station m in period t respectively；pm,tIndicate power station m period t output,WithRespectively
Indicate power station m the output of period t bound,Maximum discharge capacities of the expression power station m in period t.
Power station typical case day constraint
(1) typical day Constraint
Em,t=Em,t′ (11)
E in formulam,tAnd Em,t' indicate that power station m is electric in the total electricity and demand of t-th of scheduling slot corresponding typical day respectively
Amount.Em,t' method of determination be：
C in formulatIndicate t-th of scheduling month average load demand.
(2) typical sunrise activity of force bound
Pday in formulam,i,tIndicate outputs of the power station m at period t corresponding typical moment day i,WithRespectively
Output bounds of the expression power station m at period t corresponding typical moment day i.
(3) typical daily output Climing constant
|Pdaym,i,t-Pdaym,i-1,t|≤ΔPdaym (14)
Δ Pday in formulamIndicate the output luffing limitation of power station m.
(4) typical daily output duration constraints
(Pdaym,i-Δ+1,t-Pdaym,i-Δ,t)(Pdaym,i,t-Pdaym,i-1,tΔ=1,2 of) >=0 ... vm (15)
vmIndicate power station m minimaxs transmission power at least lasting when hop count.
DC power transmission line typical case's day constraint
(1) typical day transmission power bound
In formulaWithRatio is divided to indicate direct water transmission line of electricity above and below period t correspondence typical moment day i contributes
Limit.
(2) typical day power transmission power luffing constraint
Δ P in formulaLine m, tIndicate the typical day power transmission power luffing limitation of direct water transmission line of electricity.
(3) typical day power transmission power duration constraint
V in formulaLineIndicate direct water transmission line of electricity minimax transmission power at least lasting when hop count
(b) consider the coordination approach stage by stage of the withered phase difference of flood
Transprovincially interconnection GROUP OF HYDROPOWER STATIONS crosses over multiple provinces, send receiving end power station to have apparent water regime difference, is usually in
Reveal flood withered phase asynchronous characteristic, to play its complementary coordination ability, power station is grouped stage by stage within dispatching cycle
Coordinated scheduling.The receiving end power station flood withered phase asynchronous period is being sent, the operating position that two places power station undertakes in typical daily load is not
Together, wherein the power station in flood season undertakes base lotus, withered phase power station undertakes peak load, as shown in Fig. 1.
This obvious flood season in stage power station should play electricity ability as possible, and not by peak-valley ratio restrict, target should be
Generated energy is maximum；Withered phase power station is to reduce power grid typical case's daily load peak-valley ratio as main target, to adjust itself each moon electricity
Distribution compensates flood season power station.Flood season power station is first put into calculating herein, calculates the typical case after deducting flood season power station typical case daily output
Day remaining load Cdayi,t R：
On this basis, with lotus Cday more than typical dayi,t RLoad is faced as withered phase power station, withered phase power station is tried
It calculates, calculates the remaining load Cday for further deducting withered phase power station typical case's daily outputi,t R2：
The typical day peak-valley ratio constraint that power station of withered phase faces at this time is represented by：
I indicates that segment number when typical day, t indicate that month number, m indicate that power station number, I indicate typical day total period in formula
Number, R0Indicate peak-valley ratio, MFloodIndicate that flood season power station sum, M indicate all power station sums, Cdayi,t R1It indicates to deduct flood season electricity
It stands the typical day residue load of typical daily output, Cdayi,tIndicate typical day original loads, Pdaym,i,tIndicate m power stations
Typical daily output, Cdayi,t R2It indicates to deduct the typical day residue load after all power station typical case daily outputs.
Each moon electricity in withered phase power station is redistributed by the constraint of paddy rate, realizes the global object of typical day peak regulation, in conjunction with
Above-mentioned steps, Structure matrix are as shown in Fig. 2.
(c) transprovincially power transmission power station typical day constrains processing method
Receiving end power station can determine its typical daily generation according to formula (12), and then can according to ripe gradually cutting load method
Processing power station constraint of typical day (11)-(15) solves its typical daily output process.The typical day power process in power transmission power station transprovincially
It is directly negative using gradually cutting also by formula (16)-(18) extra high voltage direct current transmission line restrict in addition to dependent station itself constrains
Lotus method solves its typical daily output process, can not meet two aspect constraints simultaneously.Therefore, the present invention is reconstructed power transmission water power transprovincially
That stands group faces load typical day, makes to face load and meets UHV transmission line constraint naturally, then is asked with gradually cutting load method
Each power station typical case daily output process is solved, to ensure the typical day gross capability of sending end station group while meet constraint (11)-(18), specifically
Steps are as follows：
(1) each sending end power station typical day power transmission electricity E is determined according to formula (12)m,t。
(2) a virtual power station is constructed, substitutes sending end GROUP OF HYDROPOWER STATIONS, typical bu power distributing amount and every constraint representation are such as
Under：
Typical day electricity：Et=E1,t+E2,t+…+EM,t
Virtual output of power station bound constraint：
Virtual output of power station Climing constant：
Virtual power station maximum output duration constraints：
(PdayVoid, i- Δs+1, t-PdayVoid, i- Δs, t)(PdayVoid, i, t-PdayVoid, i-1, t) >=0, Δ=1,2 ... vIt is empty
In formulaIndicate virtual power station minimax transmission power at least lasting when hop count.
So far, which can meet UHV transmission line described in formula and constrain.
(3) load is faced using power grid typical case daily load as virtual power station, is determined using gradually cutting load method virtual
Power station typical case's daily output process { P1,t,P2,t,…,P24,t}。
(4) it is not so good as virtual power station because sending end GROUP OF HYDROPOWER STATIONS peak modulation capacity is practical, therefore the output process in virtual power station is added
One radix load, reconstruct sending end power station face load Pα, 24 power process values are { P1,t+PBase,P2,t+PBase,…,P24,t
+PBase}。
(5) with PαLoad is faced as sending end GROUP OF HYDROPOWER STATIONS, each power transmission power station typical day is determined in gradually cutting load method
Output process, power transmission power station can meet the typical day constraint in power station simultaneously at this time and extra high voltage line typical day constrains.
(d) optimal water level search strategy
It uses POA-DDDP algorithms to solve herein and transprovincially interconnects the optimal water level process of GROUP OF HYDROPOWER STATIONS.POA-DDDP two benches
Problem search process schematic is as shown in figure 4, specific Optimization Steps indicate as follows：
(1) t=1, m=1, n=1 are enabled；
(2) water level and t+1 period end water levels at the beginning of fixing n-th power station t period of m groups, with the storage outflow of t periodsMake
Each power station storage outflow in n-th group is existed according to set initial flow discrete steps ε for decision variableCarry out up and down it is discrete, with
3 storage outflow numerical value are respectively obtained, are denoted asAll power stations in groupConstitute 3MnIt is a
Assembled state；
(3) successively in b=1,2 ..., 3MnWhen according to upstream and downstream sequence calculating is adjusted：Power station in grouping calculates its t
Period storage outflow, t period constant flow controls, t+1 periods determine water level regulation；The power station of the outer reservoir inflow variation of grouping carries out t
Determine water level regulation with the t+1 periods.According to the typical day constraint in the processing power station, and power station t and t are updated in gradually cutting load method
It bears the typical day of+1 period and contributes, the difference of calculating target function and penalty value；
(4) n=n+1 is enabled, if n=this group of main switching station number N, m=m+1 go to step 5；Otherwise 2 are gone to step；
(5) if m=main switching station group number M, go to step 6；Otherwise 2 are gone to step；
(6) ε=ε/2 are enabled, if ε meets required precision, subproblem search terminates；Otherwise 1 is gone to step.
(e) overall method for solving step
In conjunction with the resolving ideas of above-mentioned critical issue, the primary complete long-term combined adjusting peak scheduling of the GROUP OF HYDROPOWER STATIONS of interconnection transprovincially
Method optimization process can be stated as follows：
Step 1. read basic data, initialize calculating parameter, including transprovincially interconnect power station service condition constraint and
Control condition constraint, transregional direct water Transmission constraints, by calculating such as power grid monthly average load, long-term typical daily loads
Parameter；
Step 2. is established and transprovincially interconnects the long-term combined adjusting peak Optimal Operation Model of GROUP OF HYDROPOWER STATIONS, and the model is with generated energy maximum
With the typical day minimum optimization aim of peak regulation peak-valley ratio of withered phase；
Step 3. is up to target with conventional power generation usage amount and send receiving end GROUP OF HYDROPOWER STATIONS to optimize calculating to transprovincially interconnecting, and generates
Model initial solution, while recording the maximum value R of each typical case moon, residue load peak-valley ratio day of power grid withered phase at this time0；
Withered phase minimum load peak-valley ratio constraint R=R is arranged in step 4.0-0.01；
Step 5. enables iterations k=0.
Step 6. enables calculation interval t=1, and it is hop count when schedule periods are total to define T；
Step 7. will send receiving end power station to be grouped according to affiliated basin, and meter total number packets are N groups；
If step 8. k>0；Power station two benches water level process is judged whether there is to change.If so, then resetting flow search
Step-length goes to step 9.If nothing enables t=t+1, if t>T goes to step 15, otherwise repeats this step；
Step 9. judges whether the power station for participating in calculating is in flood season, if so, preferentially being calculated, otherwise, in flood
It is calculated again after phase power optimization.The power station group sequence for calculating highest priority is enabled to be defined as n=0；
Step 10. gives under goal condition, processing peak-valley ratio constraint, transregional direct water Transmission constraints and other
Conventional hydropower station constraints, using POA-DDDP algorithm search model two benches optimal flux processes；It is negative gradually to cut simultaneously
Lotus method handles the two stage typical daily output process of power station t and t+1, calculates two benches typical day minimum load peak-valley ratio RtWith
Rt+1；
Step 11. enables n=n+1, if n<N, then repeatedly step 10, otherwise goes to step 12；
Step 12. repeats step 9-11, judges whether power station water level process has change in the adjacent group of optimizing result twice, if
Nothing then goes to step 13, otherwise, repeats step 12；
Step 13. reduces flow and searches for progress, judges whether flow search progress meets schedule requirement at this time, if so, turning
Step 9；Otherwise, 14 are gone to step；
Step 14. enables t=t+1, if t>T then enables k=k+1, goes to step 15；Otherwise, 8 are gone to step；
Step 15. judges whether each power station water level process epicycle iteration has change, if nothing, goes to step 16；Otherwise, it goes to step
6.；
Step 16. counts typical day maximum peak-valley ratio R in each moon in withered month phasemax=max { Rt′, t ' includes all withered phases
Month；
If step 17. Rmax<R then exports this and calculates scheduling scheme and withered phase minimum load peak-valley ratio binding occurrence R, makees
For a feasible program, and go to step 4；Otherwise it calculates and terminates.
It now send receiving end transprovincially to interconnect GROUP OF HYDROPOWER STATIONS as research object using Xi Luodu-Zhejiang extra-high voltage direct-current transmission engineering, adopts
Its scheduling scheme is made with the method for the present invention.Table 1 is the base data table for participating in calculating power station, and table 2 is with 50% typical section
For flow as mode input, multi-scheme scheduling result electricity and dry season peak-valley ratio table, Fig. 4 is under 50% typical section flow
Model multi-scheme peak-valley ratio-generated energy distribution situation figure can be formulated using the method that the present invention is carried as shown in table 2 and Fig. 4
The withered phase peak-valley ratios of difference under optimal electricity scheduling scheme, providing a variety of scheduling schemes, to be total to dispatcher preferred.Each scheme
Benefit of both the long-term electricity of hydroelectric system and peak load regulation network is taken into account, dispatcher can preferably be applicable according to scheduling preference
Method.The preferred power generation processes of two formulated typical deployments scheme of the invention of Fig. 5, by the power generation of itself and conventional scheduler schemes
Process compares, it is seen that the withered phase generated energy of scheduling scheme hydroelectric system that institute's extracting method of the present invention is formulated is substantially change, compared to normal
Generated energy maximum scheme is advised, withered phase electricity obviously increases, and improves the peak modulation capacity of withered phase water power.Fig. 6 and Fig. 7 shows the present invention
The scheduling scheme of suggested plans formulation mainly changes the water level output process in power station inside the province, and power transmission power station water level is contributed outside the province
Change in process is little, and scheduling difficulty of implementation is relatively low, and one is provided for the transregional conveying extensive transprovincially of China's extra-high voltage direct-current water power
The technological means of kind highly effective.
1 power station base data table of table
Multi-scheme scheduling result under the typical section flow of table 2 50%
Claims (1)
1. a kind of transprovincially interconnecting the long-term combined adjusting peak dispatching method of GROUP OF HYDROPOWER STATIONS, which is characterized in that include the following steps：
Step 1. reads basic data, initializes calculating parameter, including transprovincially interconnects the service condition constraint and control in power station
Constraint, transregional direct water Transmission constraints, by power grid monthly average load, long-term typical daily load；
Step 2. is established and transprovincially interconnects the long-term combined adjusting peak Optimal Operation Model of GROUP OF HYDROPOWER STATIONS, and the model is with generated energy maximum and withered
Phase typical case's day minimum optimization aim of peak regulation peak-valley ratio；
Step 3. is up to target with conventional power generation usage amount and send receiving end GROUP OF HYDROPOWER STATIONS to optimize calculating to transprovincially interconnecting, and generates model
Initial solution, while recording the maximum value R of each typical case moon, residue load peak-valley ratio day of power grid withered phase at this time0；
Withered phase load peak-valley ratio constraint R=R is arranged in step 4.0-0.01；
Step 5. enables iterations k=0；
Step 6. enables calculation interval t=1, and it is hop count when schedule periods are total to define T；
Step 7. will send receiving end power station to be grouped according to affiliated basin, and meter total number packets are N groups；
Step 8. resets flow step-size in search ε=ε0；
Step 9. judges whether the power station for participating in calculating is in flood season, if so, preferentially being calculated, otherwise, in flood season electricity
It stands and is calculated again after optimizing；The power station group sequence for calculating highest priority is enabled to be defined as n=0；
Step 10. under given goal condition, the constraint of processing peak-valley ratio, transregional direct water Transmission constraints and other often
Power station constraints is advised, using POA-DDDP algorithm search model two benches optimal flux processes；Simultaneously with gradually cutting load
Method handles the two stage typical daily output process of power station t and t+1, calculates two benches typical day minimum load peak-valley ratio RtWith
Rt+1；
Step 11. enables n=n+1, if n<N then goes to step 10, otherwise goes to step 12；
It is primary that step 12. executes step 9-11 again, judges in the adjacent group of optimizing result twice whether power station water level process has and changes
Become, if nothing, goes to step 13, otherwise, go to step 9；
Step 13. reduces flow step-size in searchJudge whether flow step-size in search meets the requirements at this time, if so, going to step 9；
Otherwise, 14 are gone to step；
Step 14. enables t=t+1, if t>T then enables k=k+1, goes to step 15；Otherwise, 8 are gone to step；
Step 15. judges whether each power station water level process epicycle iteration has change, if nothing, goes to step 16；Otherwise, 6 are gone to step；
Step 16. counts typical day maximum peak-valley ratio R in each moon in withered month phasemax=max { Rt′, t ' includes all withered months phase；
If step 17. Rmax＜ R then export this and calculate scheduling scheme, as a feasible program, and go to step 4；Otherwise it counts
Terminate.
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| CN111428970B (en) * | 2020-03-05 | 2023-05-05 | 三峡大学 | Large-scale hydropower station group cross-province capacity analysis model and solving method |
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