CN106815656A - Picture capturing method is dispatched in a kind of step reservoir accumulation of energy - Google Patents
Picture capturing method is dispatched in a kind of step reservoir accumulation of energy Download PDFInfo
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Abstract
The invention discloses a kind of step reservoir accumulation of energy scheduling picture capturing method, belong to HYDROELECTRIC ENERGY optimization operation and power system generation optimization dispatches field, it includes basic scheduling line obtaining step up and down, typical runoff obtaining step and increasing reduce out line of force obtaining step corresponding to basic scheduling line up and down, in the scheduling line obtaining step basic up and down, the total accumulation of energy change curve of step corresponding to each Typical Year runoff process is drawn through inverse time sequence recurrence calculation to ensure the mode of exerting oneself based on discriminant coefficient method, using the upper envelope curve of the total accumulation of energy change curve of each Typical Year step as upper basic scheduling line, and following envelope curve is used as lower basic scheduling line, in the inverse time sequence recurrence calculation, by traveling through combination come the period initial equilibrium state of tentative calculation step reservoir system.Discriminant coefficient at the beginning of the period determines that difficult and typical runoff process inquires into the problem of difficulty during step reservoir accumulation of energy scheduling picture capturing method of the invention overcomes inverse time sequence recurrence calculation, with preferable reasonability and validity.
Description
Technical field
Field is dispatched the invention belongs to HYDROELECTRIC ENERGY optimization operation and power system generation optimization, more particularly, to one
Plant the step reservoir accumulation of energy scheduling graph backstepping computational methods based on discriminant coefficient.
Background technology
Discriminant coefficient method because its clearly physical significance relatively broad application has been obtained in step reservoir combined dispatching,
Especially in terms of with the conjunctive use of step accumulation of energy scheduling graph, its research and application are more ripe, and it can not only fully send out
Step reservoir upstream and downstream compensating action is waved, and some shortcomings when discriminant coefficient method is individually used can be prevented effectively from.But,
There is research to be concentrated mainly on the step accumulation of energy scheduling graph making aspect based on various optimized algorithms, such as genetic algorithm, population
Algorithm and progressive optimal algorithm etc., for discriminant coefficient method, it is only after using it for obtaining accumulation of energy scheduling graph to be fruitful
In operation simulation, not by its accumulation of energy scheduling graph making with application in mutually unify.And for being adopted based on discriminant coefficient method
It is less through the achievement in research that inverse time sequence recurrence calculation obtains step accumulation of energy scheduling graph with Typical Year hydrology Fuzzy Period of Runoff Series.Although passing through
The mode that optimized algorithm obtains step accumulation of energy scheduling graph is simple, convenient, but optimized algorithm is generally combined with the real background of problem
Not closely, certain physical significance is lacked, the reliability of its optimum results is not also high.
Different from single graph of reservoir operation, the factor that step accumulation of energy scheduling graph considers when making is numerous, and drawing process is more
It is difficult and complicated, especially during inverse time sequence recurrence calculation is carried out using typical annual discharge series, there are following two big difficult points：
(1) the inverse time sequence recurrence calculation of day part is exerted oneself and is inquired into by system period last current state combination discriminant coefficient and period
System period initial equilibrium state, discriminant coefficient used should be the value corresponding to period initial equilibrium state in calculating, but when backstepping calculates beginning
System initial equilibrium state is unknown, therefore, the discriminant coefficient (magnitude relationship) that now obtain correspondence period initial equilibrium state just has necessarily
Difficulty, solve the problem there is presently no more ripe method.
(2) in the typical runoff process corresponding to basic scheduling line up and down is inquired into, the not only differentiation at the beginning of system day part
Coefficient be it is unknown, and stepped system come to flow size be also amount to be asked, this allows for step accumulation of energy scheduling graph and increases, reduces
The calculating for going out the line of force is extremely difficult.Effective method there is no to solve this problem at present, also Just because of this, using inverse time sequence recursion
The application that mode calculates the method for step accumulation of energy scheduling graph is greatly limited.
Patent document CN102080366A discloses a kind of method for drawing joint scheduling graph of step reservoir.The method is with system long
Row history runoff process, with ten days as calculation interval, ensures to exert oneself, by co-output method from upper as input according to each hydroelectric station design
Swim over to downstream and formulate each graph of reservoir operation according to single storehouse scheduling graph preparation method step by step.The invention is indicated with step combined dispatching figure
Exert oneself to coordinate, can to a certain extent play the compensative dispatching effect of step reservoir, improve water power calculation.But the document is public
The method for drawing joint scheduling graph of step reservoir opened exists following not enough：
(1) invention is from upstream to downstream and formulates each reservoir operation by single storehouse scheduling graph preparation method step by step by co-output method
Figure, it is contemplated that the water contact between step reservoir upstream and downstream, but fail to take into full account united peaking, and Hydro Power Systems with Cascaded Reservoirs is accumulate
The size for hiding energy is simultaneously related to the water and head in each power station in system, therefore invention gained graph of reservoir operation is not
The integral energy benefit of stepped system can be given full play to.
(2) when basin Hydro Power Systems with Cascaded Reservoirs implements combined dispatching, power system often only provides system gross capability, and sharp
When carrying out the operation of step reservoir actual schedule with invention gained scheduling graph, each reservoir can determine whether one according to the scheduling graph of itself
It is individual to exert oneself, therefore can there are problems that power network given system gross capability is unequal with each output of power station sum of step, easily cause ladder
Output distribution is difficult between level reservoir.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the present invention provides a kind of backstepping based on discriminant coefficient and calculates
Method is to obtain step reservoir accumulation of energy scheduling graph, it is intended that being passed based on storing and supplying water discriminant coefficient and inverse time sequence by being given
The mode of pushing away calculates the main-process stream of step reservoir accumulation of energy scheduling graph, and step reservoir accumulation of energy scheduling picture capturing method of the invention overcomes
Discriminant coefficient at the beginning of the period determines that difficult and typical runoff process inquires into the problem of difficulty during inverse time sequence recurrence calculation, with compared with
Good reasonability and validity.
To achieve these goals, the present invention provides a kind of step reservoir accumulation of energy scheduling graph backstepping meter based on discriminant coefficient
Calculation method, it include up and down basic scheduling line obtaining step, up and down typical runoff obtaining step corresponding to basic scheduling line and
Increasing reduces out line of force obtaining step, in the scheduling line obtaining step basic up and down,
First, the Typical Year choosing method in being obtained according to single storehouse scheduling graph, N is chosen from series history Streamflow Data long
Year typical hydrology Fuzzy Period of Runoff Series,
Then, since last period in the end of term is dispatched, based on discriminant coefficient method ensureing the mode of exerting oneself through inverse time sequence
Recurrence calculation draws the total accumulation of energy change curve of step corresponding to each Typical Year runoff process,
Finally, using the upper envelope curve of the total accumulation of energy change curve of each Typical Year step as upper basic scheduling line, and following envelope curve
As lower basic scheduling line, wherein, in the inverse time sequence recurrence calculation, the discriminant coefficient method at the beginning of the period that determines includes following step
Suddenly：
S1：The permutation and combination that is possible to of each storehouse discriminant coefficient size sequence, a row are calculated according to step reservoir number
The one reservoir numbering combination of row combination correspondence,
S2：Assuming that reservoir numbering combination at the beginning of a period, then carries out inverse time sequence and passs with reservoir numbering combination at the beginning of this period
Calculating is pushed away, water reservoir system period initial equilibrium state is drawn, each storehouse corresponding to water reservoir system period initial equilibrium state is finally calculated and is differentiated system
Number, and reservoir numbering is ranked up with each storehouse discriminant coefficient, so as to obtain reservoir numbering combination at the beginning of the another period,
S3：If reservoir numbering combination at the beginning of the another period and reservoir numbering consistent, the present period of combination at the beginning of the period assumed
Calculating terminates, and each storehouse discriminant coefficient size corresponding to reservoir numbering combination at the beginning of the period assumed differentiates at the beginning of present period and is
Number,
Otherwise, it is assumed that at the beginning of another period reservoir numbering combination, re-start calculating, until assuming that period at the beginning of reservoir
Untill numbering combination is consistent with reservoir numbering combination at the beginning of calculating another period of acquisition.
Further, in typical runoff obtaining step corresponding to the scheduling line basic up and down,
First, it is assumed that the flow that always comes of step reservoir system present period is TQ, it is many by each storehouse in step reservoir system
Annual will always carry out flow for TQ is assigned to each power station come the ratio of flowing, and each storehouse is corresponding in obtaining the step reservoir system assumed
Typical runoff,
Then, method is determined using discriminant coefficient at the beginning of the period in the scheduling line obtaining step basic up and down, with the period
Last current state is inquired into and period initial equilibrium state, the total accumulation of energy E of the step corresponding to calculation interval initial equilibrium state, and from basic scheduling line up and down
The corresponding total accumulation of energy value E' of step at the beginning of the reading period,
Finally, relatively more total accumulation of energy E and E', if both are equal, present period is calculated and terminated, with the step reservoir system assumed
The corresponding typical runoff in each storehouse is the corresponding typical runoff in each storehouse in actual step reservoir system in system,
Otherwise, with difference E-E' updating assumed system always flows TQ, is calculated again until E=E',
Mode, computes repeatedly successively, until obtaining the corresponding typical runoff of each storehouse day part in step reservoir system.
Further, during the increasing reduces out line of force obtaining step, using set increasing, reduce power generating value as etc. go out
Power generating value in power calculating, inverse time sequence recurrence calculation is carried out based on discriminant coefficient method, and acquisition is increased, reduces out the line of force accordingly,
In the inverse time sequence recurrence calculation, discriminant coefficient at the beginning of the period determines that method is obtained with the scheduling line basic up and down
Discriminant coefficient at the beginning of period in step determines that method is identical.
In general, by the contemplated above technical scheme of the present invention compared with prior art, can obtain down and show
Beneficial effect：
(1) the invention provides a kind of step reservoir accumulation of energy scheduling graph inverse time sequence recurrence calculation side based on discriminant coefficient
Method, the method makes step reservoir accumulation of energy scheduling graph by choosing typical annual discharge series through inverse time sequence recurrence calculation.With it is direct
The combined dispatching figure obtained by optimized algorithm is compared, and the inventive method is based on reservoir storing and supplying water discriminant coefficient and Typical Year water
Literary Fuzzy Period of Runoff Series, thus gained step accumulation of energy scheduling graph has preferable physical background meaning and reliability higher, it is more important
Be that discriminant coefficient determines and allusion quotation at the beginning of period during the method solves accumulation of energy scheduling graph inverse time sequence recurrence calculation well
Type runoff process inquires into problem, makes that its technology is more ripe, application prospect is more wide.
(2) present invention utilizes proposed method to inquire into its step reservoir by taking China's Li Siguang cascaded reservoirs as an example
Accumulation of energy scheduling graph, and series analog calculating long is carried out, result of calculation shows, on the premise of fraction is not reduced, is proposed
Method is superior to classical joint dispatching method in terms of gross generation and guarantee are exerted oneself, and the amplification on generated energy is 0.26%,
And the amplification on guarantee is exerted oneself is especially pronounced, 6.8% is can reach.As can be seen here, analog result demonstrates carried side well
The reasonability and validity of method.
Brief description of the drawings
Fig. 1 is for basic scheduling line computation up and down and its discriminant coefficient determines flow chart at the beginning of the period；
Fig. 2 is that the typical runoff up and down corresponding to basic scheduling line inquires into procedure chart；
Fig. 3 is total for a kind of step reservoir accumulation of energy scheduling graph backstepping computational methods based on discriminant coefficient of the embodiment of the present invention
Flow chart；
Fig. 4 is related to for a kind of step reservoir accumulation of energy scheduling graph backstepping computational methods based on discriminant coefficient of the embodiment of the present invention
And generated energy and fraction with ensureing the trend evolution of change of exerting oneself；
Fig. 5 is related to for a kind of step reservoir accumulation of energy scheduling graph backstepping computational methods based on discriminant coefficient of the embodiment of the present invention
And the Li Siguang step reservoir accumulation of energy scheduling graph for meeting Energy Maximization under fraction requirement；
Fig. 6 is related to for a kind of step reservoir accumulation of energy scheduling graph backstepping computational methods based on discriminant coefficient of the embodiment of the present invention
And precipice sheep scenery with hills and waters storehouse mean annual water level procedure chart；
Fig. 7 is related to for a kind of step reservoir accumulation of energy scheduling graph backstepping computational methods based on discriminant coefficient of the embodiment of the present invention
And crossdrift bank reservoir mean annual water level procedure chart；
Fig. 8 is related to for a kind of step reservoir accumulation of energy scheduling graph backstepping computational methods based on discriminant coefficient of the embodiment of the present invention
And Longma reservoir mean annual water level procedure chart.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not
For limiting the present invention.As long as additionally, technical characteristic involved in invention described below each implementation method that
Conflict is not constituted between this can be just mutually combined.
The present invention obtains step reservoir accumulation of energy scheduling graph by choosing typical annual discharge series through inverse time sequence recurrence calculation, and
Discriminant coefficient determination at the beginning of the period during accumulation of energy scheduling graph inverse time sequence recurrence calculation is solved well and typical footpath is flowed through
The problem that journey is inquired into.It mainly includes basic scheduling line computation up and down, typical case corresponding to scheduling line pushes away come the process of flowing substantially up and down
Asking and increasing reduces out line of force drafting part.Specifically include as follows：
(1) basic scheduling line computation up and down
First, Typical Year choosing method when being drawn according to single storehouse scheduling graph, chooses from series history Streamflow Data long
Typical hydrology Fuzzy Period of Runoff Series；Then, since dispatch last period in the end of term, with reference to discriminant coefficient method with etc. exert oneself (ensure
Exert oneself) mode draws the total accumulation of energy change curve of step corresponding to each Typical Year runoff process through inverse time sequence recurrence calculation；Finally,
Using the upper envelope curve of the total accumulation of energy change curve of each Typical Year step as upper basic scheduling line, lower envelope curve is used as lower basic scheduling line.
For it is above-mentioned effectively can not determine the period in inverse time sequence recurrence calculation at the beginning of discriminant coefficient problem, this hair
It is bright by taking a three storehouse stepped systems as an example, there is provided a kind of solution.Specifically, assuming that step reservoir is from upstream to downstream successively
Numbering is (0,1,2), if the size of each storehouse discriminant coefficient is to reservoir number sorting according at the beginning of the period, then just there is (0,1,2),
(0,2,1), (1,0,2), (1,2,0), (2,0,1) and (2,1,0) six kinds of combined situations, and in inverse time sequence recurrence calculation, institute
The size order of each storehouse discriminant coefficient at the beginning of the exactly period for needing, rather than discriminant coefficient value in itself.Therefore, can lead in calculating
Cross the period initial equilibrium state that traversal combination carrys out tentative calculation step reservoir system.It is, assuming initially that a period initial equilibrium state institute
Corresponding reservoir numbering combination, then being combined with this carries out inverse time sequence recurrence calculation, draws system period initial equilibrium state, finally calculates
Each storehouse discriminant coefficient corresponding to the initial equilibrium state, and reservoir numbering is ranked up with this, so as to obtain water at the beginning of another period
Storehouse numbering combination.If it is consistent with combination is assumed to calculate gained combination, present period is calculated and terminated, otherwise, it is assumed that another
Combination, re-starts calculating, untill assuming that combination is equal with combination is calculated.
The main-process stream of basic scheduling line computation is as shown in figure 1, Fig. 1 dispatches line computation and its at the beginning of the period for basic up and down up and down
Discriminant coefficient determines flow chart, and discriminant coefficient at the beginning of wherein solving the period determines left-hand component in the calculation process such as Fig. 1 of problem
It is shown.
Specifically, in Fig. 1, starting input N typical cases footpath flow data, and utilize i-th (i=1,2 ..., N) individual Typical Year footpath
Flow data, proceeds by backstepping and calculates from the T periods：Assuming that present period is the t periods, and step at the beginning of the hypothesis t periods is each
One size order of storehouse discriminant coefficient K, thus the K values size order combination period to flow, t period Mos water level and guarantee exert oneself
Value, through storage capacity at the beginning of the period that iterative calculation can draw each storehouse of step, so that another K value size order can be calculated, if this
The K values magnitude relationship of calculating is consistent with hypothesis, then terminate the calculating of this period, obtains the present period just total accumulation of energy of stepped system；
T=t-1 is made, into the calculating of subsequent period, until t=1, then calculate for i-th backstepping of Typical Year and terminate, one is can obtain
The individual total accumulation of energy of step (at the beginning of the period) change procedure；Likewise, to other typical annual flow data, carry out similar backstepping and calculate,
The total accumulation of energy change curve of different steps is can obtain, upper and lower envelope is finally taken to this, upper and lower basic scheduling line can be obtained.
(2) typical case corresponding to basic scheduling line inquires into come the process of flowing up and down
, it is necessary to first determine that the typical case up and down corresponding to basic scheduling line is flowed through before calculating increasing, reducing the line of force
Journey, as the typical case for increasing, reducing when exerting oneself line computation come the process of flowing.And herein typical case come flow process calculate in, not only come
Stream size is that the discriminant coefficient at the beginning of amount to be asked, and stepped system day part is also unknown quantity, and operation is realized very difficult.
The present invention provides following solution：
First, it is assumed that the flow that always comes of stepped system present period is TQ, and ratio is flowed by many annuals in each storehouse of step
Example assigns it to each power station；Then, with reference to discriminant coefficient processing method used in basic scheduling line computation, during with system
Section last current state is inquired into and system period initial equilibrium state, calculates the total accumulation of energy E of step corresponding to the period initial equilibrium state, and from basic scheduling
The corresponding total accumulation of energy value E' of another step at the beginning of the period is read on line；Finally, relatively more total accumulation of energy E and E', if both are equal,
Then present period is calculated and terminated, no person, updates assumed system always with difference E-E' to flow TQ, is calculated again until E
=E'.
As shown in Figure 2, Fig. 2 is that the typical runoff up and down corresponding to basic scheduling line was inquired into the calculation process of the method
Cheng Tu, and the typical runoff wherein solved up and down corresponding to basic scheduling line inquires into left lateral in the calculation process such as Fig. 2 of process
Shown in point.
Specifically, in Fig. 2, start to be input into the total accumulation of energy change curve of stepped system corresponding to upper and lower fundamental line, and from T
Period proceeds by backstepping calculating：Assuming that present period is t, and assumes that present period step always carrys out flow for TQ, it is according to long
Allocation proportion is flowed in row history Streamflow Data each storehouse of step for obtaining of statistics, and TQ is assigned into each reservoir of step；On this basis,
A size order of each storehouse discriminant coefficient K of step at the beginning of the t periods is assumed again that, when thus K values size order combines allocated
Duan Lailiu, t period Mos water level and ensure power generating value, through iterate to calculate each storehouse of step period at the beginning of storage capacity, so as to can calculate
Another K value size order is drawn, if this K values magnitude relationship for calculating is consistent with hypothesis, the period in each storehouse of step when thus
First storage capacity, can obtain a total accumulation of energy E of the first stepped system of present period；Additionally, from known basic scheduling line, step can be found
Another total accumulation of energy E ' at the beginning of system present period, if E=E ', present period is calculated and terminated, and t=t-1 is made, into lower a period of time
The calculating of section, otherwise assumes that present period step always carrys out flow TQ, re-starts above-mentioned calculating, until E=E ' again；Finally when
T=1, all periods calculate and terminate, and can obtain each reservoir day part of step of the upper basic scheduling line of correspondence or lower basic scheduling line
Typical case is come the process of flowing.
(3) increase, reduce line computation of exerting oneself
After the typical case corresponding to acquisition up and down basic scheduling line carrys out stream process, exerted oneself with the increasing of setting, reduction respectively
Value as etc. power generating value in output calculation, carry out inverse time sequence recurrence calculation with reference to discriminant coefficient method and be achieved with adding accordingly
Greatly, the line of force is reduced out, discriminant coefficient processing method at the beginning of the period in its calculating process is dispatched consistent during line substantially up and down with calculating.
The step reservoir accumulation of energy scheduling graph inverse time sequence recurrence calculation method main-process stream such as institute of accompanying drawing 3 based on reservoir storing and supplying water discriminant coefficient
Show.Fig. 3 is a kind of step reservoir accumulation of energy scheduling graph backstepping computational methods main-process stream based on discriminant coefficient of the embodiment of the present invention
Figure, it includes that basic scheduling line is drawn up and down, typical runoff corresponding to basic scheduling line is inquired into and increases reducing out the line of force and painting
Make three parts.
Specifically, in Fig. 3, according to two typical cases corresponding to each storehouse day part of stepped system that Fig. 2 methods describeds are obtained
Runoff process (corresponds to upper and lower basic scheduling line) respectively, and proceeding by backstepping from the T periods calculates：Assuming that present period is t
Period, and assume a size order of each storehouse discriminant coefficient K of step at the beginning of the t periods, thus the K values size order combination period is next
Stream, t period Mos water level and it is corresponding increase (or reduction is exerted oneself) value of exerting oneself, the period in each storehouse of step can be drawn through iterating to calculate
First storage capacity, so as to another K value size order can be calculated, if this K values magnitude relationship for calculating is consistent with hypothesis, terminates
The calculating of this period, obtains the present period just total accumulation of energy of stepped system；T=t-1 is made, into the calculating of subsequent period, until t=
1, backstepping is calculated and terminated, and can obtain step total accumulation of energy (at the beginning of a period) change procedure, and this process is exactly a corresponding increasing
Or reduce out the line of force.
The present invention makes by taking the step power station of China's Li Siguang basin as an example in the inverse time sequence recurrence calculation method for being provided
The step accumulation of energy scheduling graph, carries out series analog scheduling long and calculates, and result and classical joint dispatching method are carried out to score
Analysis, to show the effect that the present patent application reaches.
Wherein, Li Siguang basin is located at Yunnan Province of China and saves domestic, and seven power stations of planning construction, are followed successively by precipice on its mainstream
Yang Shan, crossdrift bank, Xin Ping stockaded villages, Longma, occupy Pu cross, Golan beach and Tu Kahe, wherein have regulation performance is Ya Yangshan, crossdrift bank
With three power stations of Longma, this three adjustment type power stations are chosen in embodiment as research object.Three normal storages in power station
Water level is respectively 835m, 756m and 639m, and level of dead water is respectively 818m, 740m and 605m, and design generating fraction is 95%.
The flood season limit level of precipice Yang Shan and crossdrift bank reservoir is respectively 818m and 740m, and the flood season limit level of Longma reservoir is 639m.
Implementation steps of the present invention are as follows：
Step one：Typical annual discharge series are chosen from series history Streamflow Data long, to ensure to exert oneself as day part
Exert oneself, with reference to discriminant coefficient method, inverse time sequence inquires into the just accumulation of energy of stepped system day part since last period of schedule periods, with
This obtains the accumulation of energy change curve of stepped system.The envelope curve up and down for taking each Typical Year accumulation of energy change curve is dispatched respectively as accumulation of energy
The scheduling line basic up and down of figure, specific calculation process is as shown in Figure 1.
Step 2：Curve is developed as system accumulation of energy with the scheduling line basic up and down for obtaining, with reference to discriminant coefficient method and guarantee
Power generating value inquires into typical case corresponding to it come the process of flowing, and idiographic flow is as shown in Figure 2.
Step 3：According to gained typical case come the process of flowing and corresponding increasing, reduction power generating value, with reference to discriminant coefficient method from tune
Spending last period of phase starts inverse time sequence and inquires into each increasing, reduction to exert oneself graph, makes upper and lower in its flow and step one
Backstepping calculating process during basic scheduling line is basically identical, and idiographic flow is as shown in rightmost part in Fig. 3.
The result obtained according to the inventive method is as follows：
When the coefficient of variation of exerting oneself of accumulation of energy scheduling graph is taken as 1.2,1.1,1,0.9 and 0.8, step can be obtained and always generated electricity
The conditional curve that amount and fraction change and change with ensureing to exert oneself, as shown in Figure 4.Due to the generating of Li Siguang step reservoir
Fraction requirement is not less than 95%, therefore, according to Fig. 4 iting can be seen from, it is 115100kW that the now total guarantee of step is exerted oneself, and step is put down for many years
Equal generated energy is 23.56 hundred million kWh, and corresponding step accumulation of energy scheduling graph is as shown in Figure 5.
To fully demonstrate implementation result of the invention, the result that the above results are dispatched with classical joint is contrasted below
Analysis.Classical joint scheduling is scheduled operation from top to bottom using single storehouse scheduling graph in each storehouse of step, and the generating in each power station is protected
The requirement of card rate is not less than 95%.The guarantee of gained precipice Yang Shan, crossdrift bank and the storehouse of Longma three is exerted oneself respectively 23200kW, 23406kW
And 61200kW, its summation is 107806kW, and step Mean annual energy production is 23.500 hundred million kWh.It follows that contrast tradition
Combined dispatching, gained accumulation of energy scheduling graph result increased 7294kW on guarantee is exerted oneself in the present invention, and amplification is 6.8%, in ladder
0.060 hundred million kWh are increased in level gross generation, amplification is 0.26%.
Thus, it will be seen that under the constraint of identical generating fraction, gained step accumulation of energy scheduling graph is in hair in the present invention
Electricity and guarantee exert oneself two aspect be superior to classical joint dispatching method, although its amplification is smaller on generated energy, its
Ensure the amplification highly significant in terms of exerting oneself.As can be seen here, present invention gained accumulation of energy scheduling graph can be improved largely
The electrical stability and reliability of cascaded power generating system, so as to improve power supply quality, imitate with significant economic benefit and society
Benefit.
Additionally, according to gained step accumulation of energy scheduling graph, can obtain putting down for many years for precipice Yang Shan, crossdrift bank and three reservoirs of Longma
Equal water level process is respectively as shown in Fig. 6,7,8.The generating as can be seen that upper pond often first discharges water from this three width figure, so that
The water of upper pond makes full use of the high water head of lower reservoir to generate electricity, and the past generating that discharges water backward of lower reservoir, to remain high
Water level runs, so as to fully lift the power benefit of upper pond water.As can be seen here, the water level mistake of each storehouse operation simulation of step
Journey is consistent with actual schedule operating principle, and this further demonstrates the validity and reasonability of method provided by the present invention.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, it is not used to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc., all should include
Within protection scope of the present invention.
Claims (3)
1. a kind of step reservoir accumulation of energy scheduling picture capturing method, it is characterised in that it include up and down basic scheduling line obtaining step,
Typical runoff obtaining step and increasing reduce out line of force obtaining step, the tune basic up and down corresponding to basic scheduling line up and down
In degree line obtaining step,
First, the Typical Year choosing method in being obtained according to single storehouse scheduling graph, N allusion quotations are chosen from series history Streamflow Data long
Type hydrology Fuzzy Period of Runoff Series,
Then, since last period in the end of term is dispatched, based on discriminant coefficient method ensureing the mode of exerting oneself through inverse time sequence recursion
The total accumulation of energy change curve of step corresponding to each Typical Year runoff process is calculated,
Finally, using the upper envelope curve of the total accumulation of energy change curve of each Typical Year step as upper basic scheduling line, and following envelope curve conduct
Lower basic scheduling line, wherein, in the inverse time sequence recurrence calculation, determine that discriminant coefficient method comprises the following steps at the beginning of the period：
S1：Permutation and combination, an arrangement group are possible to according to what step reservoir number each storehouse discriminant coefficient size of calculating sorted
One reservoir numbering combination of correspondence is closed,
S2：Assuming that reservoir numbering combination at the beginning of a period, then in terms of the combination of reservoir numbering carries out inverse time sequence recursion at the beginning of this period
Calculate, draw water reservoir system period initial equilibrium state, finally calculate each storehouse discriminant coefficient corresponding to water reservoir system period initial equilibrium state, and
Reservoir numbering is ranked up with each storehouse discriminant coefficient, so as to obtain reservoir numbering combination at the beginning of the another period,
S3：If reservoir numbering combination at the beginning of the another period is consistent with reservoir numbering combination at the beginning of the period assumed, present period is calculated
Terminate, each storehouse discriminant coefficient size corresponding to reservoir numbering combination at the beginning of the period assumed is the first discriminant coefficient of present period,
Otherwise, it is assumed that at the beginning of another period reservoir numbering combination, re-start calculatings, until assuming that period at the beginning of reservoir number
Untill combination is consistent with reservoir numbering combination at the beginning of calculating another period of acquisition.
2. picture capturing method is dispatched in a kind of step reservoir accumulation of energy as claimed in claim 1, it is characterised in that described basic up and down
In typical runoff obtaining step corresponding to scheduling line,
First, it is assumed that the flow that always comes of step reservoir system present period is TQ, put down for many years by each storehouse in step reservoir system
Will always carry out flow for TQ is assigned to each power station come the ratio of flowing, obtain the corresponding typical case in each storehouse in the step reservoir system assumed
Runoff,
Then, method is determined using discriminant coefficient at the beginning of the period in the scheduling line obtaining step basic up and down, with period Mo shape
State is inquired into and period initial equilibrium state, the total accumulation of energy E of the step corresponding to calculation interval initial equilibrium state, and is read from basic scheduling line up and down
The total accumulation of energy value E' of corresponding step at the beginning of period,
Finally, relatively more total accumulation of energy E and E', if both are equal, present period is calculated and terminated, with the step reservoir system of hypothesis
The corresponding typical runoff in each storehouse is the corresponding typical runoff in each storehouse in actual step reservoir system,
Otherwise, with difference E-E' updating assumed system always flows TQ, is calculated again until E=E',
Mode, computes repeatedly successively, until obtaining the corresponding typical runoff of each storehouse day part in step reservoir system.
3. picture capturing method is dispatched in a kind of step reservoir accumulation of energy as claimed in claim 2, it is characterised in that the increasing reduction
Go out in line of force obtaining step,
Using set increasing, reduce power generating value as etc. power generating value in output calculation, inverse time sequence is carried out based on discriminant coefficient method
Recurrence calculation, acquisition is increased, reduces out the line of force accordingly,
In the inverse time sequence recurrence calculation, discriminant coefficient at the beginning of the period determines method with the scheduling line obtaining step basic up and down
In period at the beginning of discriminant coefficient determine that method is identical.
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