CN107563586A - A kind of ahead market based on step power station coupled relation goes out clear mechanism system - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S50/00—Market activities related to the operation of systems integrating technologies related to power network operation or related to communication or information technologies
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Abstract
Go out clear mechanism system the invention discloses a kind of ahead market based on step power station coupled relation to comprise the following steps：Step 1：Upstream power station and downstream power station report quotation information；Step 2：Establish and consider that the ahead market in upstream power station and downstream power station coupled relation goes out clear Optimized model；Step 3：Carry out ahead market goes out clear stream journey, it is an object of the invention to provide the principle and model that a kind of ahead market based on step power station coupled relation goes out clear, realize upstream and downstream power station combine it is clear, solve lower station acceptance of the bid electricity with can generating flow match unbalance.
Description
Technical field
The present invention relates to technical field of power systems, more particularly to the ahead market based on step power station coupled relation
Go out the principle and model of clear.
Background technology
Being developed by rolling way in river basins for many years, China is completed numerous step power stations, and with electricity marketization construction
Iterative method, cascade hydropower participates in electricity market and other water power, thermoelectricity and bids on the same stage as trend.Cascade hydropower development mould
Formula is typically that big storage capacity tap power station is built in upstream, and a string of downstream belt is without/daily regulated hydroplant.Have benefited from excellent in upstream power station
Regulation capacity, can flexibly it be bidded according to runoff and Market Situation prediction；Compensation adjustment dependence of the lower station to upstream power station
By force, difficulty is independently bidded, it is necessary to which each cascade coordination can distribute hydroelectric resources rationally.But China's generally existing step power station is thrown
The skimble-scamble phenomenon of main body is provided, upstream power station lacks the driving force for considering lower station power benefit, it is difficult to realizes full basin water
Electric resources combined optimization.
In view of the above-mentioned problems, some scholars attempt by agent's agency mechanism, set up cogeneration company or step association
Regulating mechanism realizes cascade hydropower joint operation, and has probed into Power Market lower step power station cooperation interests and shared and imitate
Beneficial compensation mechanism, to promote United Dispatching smoothly to implement.However, each step power station construction is different with subject of operation in reality,
Even transprovincially area develops, and reservoir hydrologic information is lack of standardization and information sharing is obstructed seriously, runs counter to the implementation of United Dispatching.This
Outside, owner to combine bid, cooperate with operation distribution of interests it is more sensitive, it is impossible to meet to be more likely to independent fortune during prospective earnings
Battalion.Market strategy belongs to personal information, and downstream power station is difficult to accurately know upstream power station bid information, and competitive bidding will be caused electric
Amount is unbalance with real generated energy and " owing " or " abandoning water ", brings market unsettled and water resource waste.If from electricity market top layer
Design is started with, in market clearing mechanism consider step upstream and downstream power station between waterpower, electric power coupled relation, perhaps on
The problem of stating can be readily solved.
Temporally yardstick can be divided into Long-term Market, short-term market, ahead market and Real-time markets to electricity market.On
Swim good regulation power station and may participate in complete period all kinds of transaction, and downstream is influenceed without/daily regulated hydroplant by runoff randomness, middle length
Phase prediction output is difficult, is adapted to participate in ahead market and Real-time markets.Ahead market completes most main market players's electricity
Transaction and the work of power system balance of electric power and ener, Real-time markets only adjust as generated energy deviation and imbalance power.Therefore,
Lower station ahead market acceptance of the bid electricity is obtained, is to complete to go out a few days ago key that is clear, determining cleaing price, and formulate operation meter
The basis drawn.
It is desirable to have, a kind of ahead market based on step power station coupled relation goes out the principle of clear and model can
To overcome or at least mitigate the problems of the prior art.
The content of the invention
It is an object of the invention to provide the original that a kind of ahead market based on step power station coupled relation goes out clear
Reason and model, realize upstream and downstream power station combine it is clear, solve lower station acceptance of the bid electricity with can generating flow match unbalance ask
Topic.
The present invention provides a kind of ahead market based on step power station coupled relation and goes out clear mechanism system, and its feature exists
In comprising the following steps：
Step 1：Upstream power station and downstream power station report quotation information；
Step 2：Establish and consider that the ahead market in upstream power station and downstream power station coupled relation goes out clear Optimized model；
Step 3：Carry out ahead market goes out clear stream journey.
Preferably, the upstream power station in the step 1 reports quotation information to include：According to market supply and demand situation and valency
The pre- direction finding trade center of lattice submits unit output constraint, ramping rate constraints, declare capacity section and section valency, current reservoir level and
Water-carrying capacity is abandoned, trade center determines to flow using the upstream output of power station that piecewise linear function describes and generating according to current reservoir level
Piecewise linearity parameter in magnitude relation formulaWith
Preferably, the downstream power station in the step 1 reports quotation information to include：
1) forecast interval enters flow curve Id,t, t=1,2 ..., T；
2) obtained and contributed and piecewise linearity parameter in letdown flow piecewise linear function according to current reservoir level
Preferably, step power station output model is established, step power station represents as follows in period t output：
Wherein, i numbers for step power station；ηiPower factor is integrated for power station i；For the generating stream in period t
Amount, unit m3/s；Hi,tFor net water heads of the power station i in period t, unit m；Zi,t、Respectively power station i is in period t
Decision-making reservoir level and tailwater level, unit m,For the loss of flood peakes of the power station i in period t, unit m, aerial drainage under power station
Amount includes generating flowWith abandon water-carrying capacityWhen abandoning waterThenTake the generating flow upper limitNothing is abandoned
WaterThen letdown flow takes generating flow
Step upstream and downstream power station water balance relation is established, lower station reservoir inflow is by local inflow and upstream electricity
Letdown flow of standing determines that reservoir water-holding quantity is in t period end lower stations：
Wherein, u, d subscript represent upstream and downstream power station respectively；Vd,t-1、Vd,tRespectively t-1 and t period end lower stations
Decision-making storage capacity, the m of unit hundred million3；Id,tLower station reservoir inflow and section naturally become a mandarin respectively in period t, unit
m3/s；τu,dThe current time lag between the power station of upstream and downstream；eγFor river course smoothization coefficient, lower station becomes a mandarin and upstream power station τu,d
The formula of multiple period aerial drainages before is：
Wherein, S, s be respectively influence lower station become a mandarin when hop count and when segment number, ξsFor proportionality coefficient,
According to the position in adjacent two-stage power station, step power station bridging mode includes：Eclipsed form linking, interconnection system linking
Or discontinuous linking, eγAnd τu,dIt is different according to bridging mode value；Eclipsed form is connected and interconnection system linking step power station, on
Trip power plant tail water position is connected with lower station the water level of the frontal pool, and mountain channel is built in adjacent two-stage power station in, mutual distance closely and
Upstream power station aerial drainage is rapid, and current time lag and river course smoothization, i.e. τ can be neglectedu,d=0, eγ=1, balance fortune is put in storage in lower station
Under line mode, generating flow is upstream power station aerial drainage；The cascade hydropower upstream power station and lower station of discontinuous linking are present
Certain distance, current time lag and discharge curve smoothization be can not ignore；
The coupled relation in upstream power station and downstream power station is established, the big storage capacity power station in upstream, which is ignored, in a few days runs forebay
SEA LEVEL VARIATION, the non-linear relation of tailwater level, the loss of flood peak and letdown flow, Hydropower Unit is set to contribute with generating flow in non-thread
Sexual intercourse, error is reduced to simplify to calculate, upstream output of power station-generating flow relation is described using piecewise linear function：
Wherein, kuNumbered for piecewise interval,Respectively sectional linear fitting parameter, mainly by before in period t
Pool water level, comprehensive power factor, and the incidence coefficient of tailwater level, the loss of flood peak and letdown flow determine；For upstream power station
Generating flow, it is assumed that, to be put in storage balance mode operation, ignore the water level of the frontal pool fluctuation, letdown flow without/daily regulated hydroplant in downstream
As upstream power station aerial drainage and local inflow, the piecewise linear function being also indicated as on letdown flow of contributing：
Wherein,Sectional linear fitting parameter respectively in period t,, will for downstream water power plant discharge
Formula (7) substitutes into formula (8) and can obtained：
Wherein,It is preset parameter, Id,t、For input quantity, formula (9) can represent
For：
Formula (10) is upstream and downstream Power Station power coupled relation, αt、βtFor the coefficient of coup：
Upstream power station is put down the withered phase and run in a manner of nothing abandons water,If the wet season abandons water, upstream power station is expired
Set out power, steadily abandon water, without considering current time lag and flow line smoothization, i.e. τu,d=0, eγ=1.
Preferably, trade center passes through in the step 2WithWater is abandoned in parameter, and upstream power station
The data of flow, lower station local inflow, substitute into formula (11) and determine upstream power station electric power coefficient of coup αt, lower station electricity
Power coefficient of coup βt, to embody the special consideration to step upstream and downstream power station electric power coupled relation, capacity is declared into upstream power station
Section, section valency, and the corresponding coupled section capacity in lower station individually describe in clear Optimized model is gone out a few days ago：
Wherein, Jud,tThe income that generates electricity is ready in period t for step upstream power station, downstream power station； Respectively upstream power station is in period t, t- τu,dInner capacities section kGAcceptance of the bid capacity, each capacity in each Power Generation day part
Duan Zhongbiao capacity is optimized variable.
Preferably, the constraints for going out clear Optimized model a few days ago includes：
1. downstream water output of power station constrains, consider that lower station reservoir inflow crosses the situation of water diversion flow limitation, formula
(10) it is expressed as：
Wherein,For lower station EIAJ, minimum load；
2. acceptance of the bid capacitance balance constraint representation is：
Preferably, after receiving each market member quotation information, trade center will be carried out out clearly according to above-mentioned Optimized model, institute
The clear stream journey that goes out for stating ahead market comprises the following steps：
1) upstream power station reports capacity section and section valency, current reservoir level, abandons water-carrying capacity, and lower station reports local inflow
Curve, piecewise linearity parameter
2) trade center determines piecewise linearity parameter according to the current reservoir level in upstream power station
3) trade center calculates upstream power station and lower station electric power coefficient of coup at、βt；
4) power purchase business and other generating Biddings, it is clear that trade center completes going out for the ahead market；
5) trade center announces out clear electricity price and acceptance of the bid capacity.
Go out clear mechanism system the invention discloses a kind of ahead market based on step power station coupled relation, it is described a few days ago
Market clearing mechanism has analysed in depth waterpower between the power station of step upstream and downstream, electric power coupled relation, and by it in city a few days ago
Paid attention to during going out clearly field：Upstream power station participates in ahead market and bidded, and as price takers, it declares electricity for lower station
Amount is expressed as declaring the linear function of electricity on upstream power station, incorporates ahead market and goes out clear Optimized model, upper and lower so as to realize
Trip power station combine it is clear, solve lower station acceptance of the bid electricity with can generating flow match unbalance；Emphasis during going out clearly
The influence that current time lag between upper and lower power station is run to lower station is considered, to ensure actual power ability with contributing a few days ago
Plan matches.
Brief description of the drawings
Fig. 1 is 3 sections of quotation schematic diagrames of power purchase business and Power Generation.
Fig. 2 is market clearing schematic diagram.
Fig. 3 is that ahead market goes out clear flow chart.
Fig. 4 is Power Generation acceptance of the bid capacity.
Fig. 5 is power purchase business acceptance of the bid capacity.
Fig. 6 is the quotation of upstream power station, cleaing price and capacity of always getting the bid.
Fig. 7 is the bid of upstream and downstream power station and acceptance of the bid capacity.
Fig. 8 be the wet season without time lag when upstream and downstream power station submit a tender and acceptance of the bid capacity.
Fig. 9 is all Power Generation acceptance of the bid capacity curves.
Figure 10 be put down the withered phase, without time lag when upstream and downstream power station submit a tender and acceptance of the bid capacity.
Figure 11 is with/without current time lag market simulation cleaing price and the quotation of upstream power station.
Embodiment
To make the purpose, technical scheme and advantage that the present invention is implemented clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label represent same or similar element or the element with same or like function.Described embodiment is the present invention
Part of the embodiment, rather than whole embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to uses
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.Under
Embodiments of the invention are described in detail with reference to accompanying drawing for face.
In view of the general features of generating variable cost, for ease of settlement for market trade, some electricity markets use timesharing
Section ladder quotation mechanism (referred to as segmentation quotation), it requires that market member carries the previous day by the bid data of next day each trading session
Submit trade center, including section valency and correspondent section capacity.The quotation of Power Generation must be with the incremental monotonic increase of capacity section；Power purchase business
The quotation of (including sale of electricity company and power consumer) is conversely monotone decreasing.
As shown in figure 1, the section capacity that PD and PG are respectively power purchase business and Power Generation is declared；π D and π G be respectively power purchase business and
The quotation of Power Generation correspondent section capacity.
As shown in Fig. 2 trade center integrates out the section capacity and section valency that day part power purchase business and Power Generation are declared accordingly
Supply curve and demand curve.According to supply-demand structure, demand-and-supply-curve intersection point is market market pricing price (market
Cleaning price, MCP) and go out clear electricity (or acceptance of the bid capacity).
The Optimized model of above-mentioned ahead market segmentation quotation and market pricing mechanism is using social welfare maximization as target, table
Show as follows：
In formula：J is the social total benefit that transaction is brought；T and t be respectively total cycle and when segment index；Subscript D and G distinguish
Represent power purchase business and Power Generation；ND、NG、nD、nGRespectively participate in power purchase business, Power Generation sum and the numeral index of ahead market；
KD、KG、kD、kGThe respectively declarable capacity hop count of power purchase business, Power Generation and corresponding segment number；Respectively period t power purchase business nDIn capacity section kD, Power Generation nGIn capacity section kG's
Quotation (member/MWh) and acceptance of the bid capacity (MW)；Δ t is that market member is offered the period, and the present embodiment takes 1h.
The constraints of consideration mainly includes：Power Generation and the constraint of power purchase business acceptance of the bid capacitance balance, Power Generation unit output
Capacity-constrained, Power Generation and power purchase business acceptance of the bid capacity-constrained etc. are declared with Climing constant, power purchase business.
Marketing analog simulation is carried out with the system comprising 6 Power Generations and 8 power purchase business.Power Generation 5,6 is respectively
Certain cascade hydropower upstream and downstream power station, operational factor see attached list A1；Other Power Generations are conventional thermal power plant, and operational factor is seen attached list
A2.4 big industrial users are included in 8 power purchase business, 2 commercial users and 2 sale of electricity companies, electricity consumption data see attached list A3.
The cascade hydroelectric station operation parameter of Table A 1
The Power Generation operating unit parameter of Table A 2
The power purchase business electricity consumption situation of Table A 3
Adaptability for checking institute's proposition clear system to cascade hydropower difference bridging mode, the present embodiment simulation upstream and downstream
Two kinds of situations of power station non-water flow time lag and 2h current time lag, and divided respectively exemplified by withered phase and wet season typical day of making even
Analysis.
Ahead market goes out sorting analysis (upstream and downstream power station non-water flow time lag), it is assumed that is held in the mouth in interconnection system in upstream and downstream power station
Connect, apart near and middle streamflow rapidly, current time lag is faint to lower station influence on system operation negligible, respectively to putting down the withered phase
Analyzed with wet season typical case day market clearing result.
As shown in figure 3, the clear stream journey that goes out of ahead market comprises the following steps：
1. upstream power station reports capacity section and section valency, current reservoir level, abandons water-carrying capacity, lower station reports local inflow
Curve, piecewise linearity parameter
2. trade center determines piecewise linearity parameter according to the current reservoir level in upstream power station
3. trade center calculates upstream power station and lower station electric power coefficient of coup at、βt；
4. power purchase business and other generating Biddings, it is clear that trade center completes going out for the ahead market；
5. trade center announces out clear electricity price and acceptance of the bid capacity.
1) withered phase typical case day is put down
As shown in Figures 4 and 5, thermal power plant's acceptance of the bid capacity curve is integrally steady in Power Generation, only increases in the load peak period
Contribute, but fluctuating range is limited, such as：Power Generation 2 and 4 avoids marginal unit, steadily increases on daytime and declares capacity.Upper water
Power station unit flexible operation, strategic bidding are changed with following the trail of load and electricity price, and its capacity of getting the bid tends to consistent with load variations,
Marginal unit is undertaken in some load peak periods, as shown in fig. 6, cleaing price and upstream power station highest section valency are provided, and entirely
System is always got the bid capacity curve.Big industrial user's electricity consumption curve is steady in power purchase business, and quotation is higher, and acceptance of the bid capacity curve is relatively flat
Surely (such as power purchase business 1 and 2), the middle-size and small-size industry and commerce user of sale of electricity corporate agent and resident, are most active in electricity market
Role, quotation is flexible, and acceptance of the bid capacity curve peak valley is clearly demarcated.
As shown in fig. 6, flat withered phase upstream power station storage capacity nargin is loose, no pressure of flood, and in this simulation system, upstream
Power station accounts for the 24.43% of total installed capacity, therefore formulates rational bidding strategies using limited water, follows the trail of price change, low storage
It is occurred frequently to obtain more interests, and marginal unit is undertaken in periods such as 7,10-12, its highest declares section valency as market clear price
Lattice.During this bids with actual electricity market, the larger electricity power enterprise of installation accounting carries out strategic bidding according to opportunity cost, holds
It is that situation about itself making profit is consistent to carry on a shoulder pole marginal unit.
As shown in fig. 7, in ahead market bid process, capacity section, acceptance of the bid capacity, and trade center are declared in upstream power station
According to upstream and downstream power station electric power coupled relation, obtained lower station can submit a tender section capacity and acceptance of the bid capacity.Understand：Due to it is upper,
Downstream water output of power station is linear, and lower station acceptance of the bid capacity depends on upstream power station acceptance of the bid capacity so that day part
It is consistent with the variation tendency for capacity of getting the bid that capacity is declared in upstream and downstream power station.It is low that the upstream power station majority period declares highest section valency
In or as market clearing price, almost full capacity is got the bid in upstream and downstream power station, only some periods (such as：21-24h), city
Field supply and demand is well-to-do, and cleaing price is relatively low, fails full electricity acceptance of the bid.Go out in the ahead market for considering upstream and downstream power station coupled relation
Under clear system, it is bent that downstream power station can obtain the acceptance of the bid capacity to match with upland water without upstream power station bid information
Line, in a few days run according to the capacity curve arrangement, overall process is and convergent with workload demand curve tendency without abandoning water, promotes water power
The utilization of resource, and be advantageous to system safe and stable operation.
2) wet season typical case day
Wet season, ensure consumption scale, avoid abandoning the main target that water is hydroelectric station operation.Now, upstream power station exists
Each capacity section quotation is relatively low in ahead market, is also price takers so that intimate full-load output in a few days running, downstream electrical
Stand and also contributed with straight line, typical case wet season, upstream and downstream day power station bid capacity section and acceptance of the bid capacity curve are as shown in Figure 8.
All Power Generation acceptance of the bid capacity curves as shown in Figure 9, it is known that：Because in the system of simulation, total installed capacity of hydropower accounting reaches
To 43.97%, the wet season big hair of each water power, it is obvious that drug on the market, and each generating Bidding is relatively low, drags down the market price.Thermal power plant
Entirety subtract output operation, only undertaken in some load peak periods marginal unit (such as：Power Generation 1 and 3).
Ahead market goes out sorting analysis (upstream and downstream power station 2h current time lag), it is assumed that is held in the mouth in discontinuous in upstream and downstream power station
Connect, section current time lag is 2h, and the intimate full-load output in wet season upstream power station, aerial drainage curve is steady, and current time lag is to downstream electrical
Stand influence on system operation unobvious, can give and ignore, Main Analysis equals withered phase typical case day current time lag and ahead market is gone out to settle accounts the shadow of fruit
Ring.As shown in Figure 10, put down withered typical case phase, upstream and downstream day power station and declare section capacity and acceptance of the bid capacity curve.As shown in figure 11,
The ahead market cleaing price and upstream power station highest that upstream and downstream power station is simulated respectively with/without current time lag declare a section valency.
As shown in Figure 10：In the flat withered phase, upstream power station strategic bidding makes the fluctuation of acceptance of the bid capacity curve larger, during by current
Stagnant influence, lower station acceptance of the bid capacity curve substantially lags behind upstream power station, and fluctuates and weaken, and this is due to river course smoothization effect
Weaken peak flow along journey, flow thread is presented certain " peak load shifting ".Compared to the day of upstream and downstream power station non-water flow time lag
Preceding market clearing simulation is (see Fig. 7), and under identical quotation, capacity is got the bid in some period significant changes in upstream power station, such as：11h
17.64MW is reduced, 12h reduces 45.60MW.Trace it to its cause：When non-water flow time lag is simulated, upstream power station strategic bidding 7,
10-12h assume responsibility for marginal unit；When having the simulation of current time lag, lower station present period gets the bid capacity by the preceding upstream power stations of 2h
Capacity of getting the bid determines, has been fixed value, has caused day part supply curve to translate, and it is bent that superposition current smoothization brings lower station to contribute
The influence of line change, upstream power station only undertakes marginal unit in 11h, sees Figure 11.Acceptance of the bid capacity is by each hair corresponding to marginal price
Electric business is distributed by declaring capacity in proportion, and capacity is got the bid by being defined as fixed value before 2h in lower station, is no longer participated in proportion point
With the acceptance of the bid capacity at marginal price so that 11h acceptance of the bid capacity in upstream power station is cut in.Upstream power station acceptance of the bid capacity 12h is cut
Subtract is caused by peak capacity section is not got the bid；And 7h, 10h acceptance of the bid capacity do not change, be due to non-water flow time lag simulation in, on
It is marginal unit and full capacity acceptance of the bid to swim power station, is not re-used as marginal unit in the simulation of 2h current time lag, but be also full capacity
Acceptance of the bid.Upstream power station does not undertake marginal unit in other periods, and acceptance of the bid capacity is unchanged.
The present invention, which proposes, considers that the ahead market of upstream and downstream power station coupled relation goes out clear system, by upstream and downstream power station
The linear function that current magnitude relation is converted to output incorporates clear Optimized model, makes trade center can be according only to upstream and downstream power station
The output coefficient of coup, upstream and downstream power station is combined clearly, alleviate lower station hair caused by information asymmetry in marketing
The flux matched unbalance of electric current, evades transaction risk, is enriched with for China's water power, and particularly weak regulating power power station is in large scale
The spot market construction in area provides reference.
It is last it is to be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
The present invention is described in detail with reference to the foregoing embodiments for pipe, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from the essence of various embodiments of the present invention technical scheme
God and scope.
Claims (7)
1. a kind of ahead market based on step power station coupled relation goes out clear mechanism system, it is characterised in that including following step
Suddenly：
Step 1：Upstream power station and downstream power station report quotation information；
Step 2：Establish and consider that the ahead market in upstream power station and downstream power station coupled relation goes out clear Optimized model；
Step 3：Carry out ahead market goes out clear stream journey.
2. the ahead market as claimed in claim 1 based on step power station coupled relation goes out clear mechanism system, its feature exists
In：Upstream power station in the step 1 reports quotation information to include：According to market supply and demand situation and price expectation to transaction
Center submits unit output constraint, ramping rate constraints, declares capacity section and section valency, current reservoir level and abandon water-carrying capacity, hands over
Upstream output of power station and the generating flow relation formula that easy center determines to describe using piecewise linear function according to current reservoir level
In piecewise linearity parameterWith
3. the ahead market as claimed in claim 1 based on step power station coupled relation goes out clear mechanism system, its feature exists
In：Downstream power station in the step 1 reports quotation information to include：
1) forecast interval enters flow curve Id,t, t=1,2 ..., T；
2) obtained and contributed and piecewise linearity parameter in letdown flow piecewise linear function according to current reservoir level
4. the ahead market as claimed in claim 2 or claim 3 based on step power station coupled relation goes out clear mechanism system, its feature
It is：Step power station output model is established, step power station represents as follows in period t output：
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<mi>H</mi>
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<mo>=</mo>
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<mi>Z</mi>
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<mi>i</mi>
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<mi>t</mi>
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<mi>d</mi>
</msubsup>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, i numbers for step power station；ηiPower factor is integrated for power station i；For the generating flow in period t, unit
m3/s；Hi,tFor net water heads of the power station i in period t, unit m；Zi,t、Respectively solution banks of the power station i in period t
Water level and tailwater level, unit m,For the loss of flood peakes of the power station i in period t, unit m, power station letdown flow includes hair
The magnitude of currentWith abandon water-carrying capacityWhen abandoning waterThenTake the generating flow upper limitNothing abandons water
Then letdown flow takes generating flow
Step upstream and downstream power station water balance relation is established, lower station reservoir inflow is by under local inflow and upstream power station
Vent flow determines that reservoir water-holding quantity is in t period end lower stations：
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<mi>d</mi>
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<mi>n</mi>
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<mo>-</mo>
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<mo>&rsqb;</mo>
<mo>&times;</mo>
<mi>&Delta;</mi>
<mi>t</mi>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
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<mo>(</mo>
<mn>3</mn>
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<mi>d</mi>
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<mi>&tau;</mi>
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<mi>u</mi>
<mo>,</mo>
<mi>d</mi>
</mrow>
</msub>
</mrow>
<mi>D</mi>
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<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>4</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, u, d subscript represent upstream and downstream power station respectively；Vd,t-1、Vd,tRespectively t-1 and t period end lower stations certainly
Plan storage capacity, the m of unit hundred million3；Id,tLower station reservoir inflow and section naturally become a mandarin respectively in period t, unit m3/s；
τu,dThe current time lag between the power station of upstream and downstream；eγFor river course smoothization coefficient, lower station becomes a mandarin and upstream power station τu,dBefore
The formula of multiple period aerial drainages is：
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<mo>-</mo>
<mo>-</mo>
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Wherein, S, s be respectively influence lower station become a mandarin when hop count and when segment number, ξsFor proportionality coefficient,
According to the position in adjacent two-stage power station, step power station bridging mode includes：Eclipsed form linking, interconnection system linking or
Disconnected formula linking, eγAnd τu,dIt is different according to bridging mode value；Eclipsed form is connected and interconnection system linking step power station, upstream electricity
Tailwater level of standing is connected with lower station the water level of the frontal pool, and mountain channel is built in adjacent two-stage power station in, and mutual distance is near and upstream
Power station aerial drainage is rapid, and current time lag and river course smoothization, i.e. τ can be neglectedu,d=0, eγ=1, be put in storage balance movement side in lower station
Under formula, generating flow is upstream power station aerial drainage；The cascade hydropower upstream power station and lower station of discontinuous linking exist certain
Distance, current time lag and discharge curve smoothization be can not ignore；
The coupled relation in upstream power station and downstream power station is established, the big storage capacity power station in upstream, which is ignored, in a few days runs the water level of the frontal pool
Change, the non-linear relation of tailwater level, the loss of flood peak and letdown flow, it is in nonlinear dependence to make Hydropower Unit output and generating flow
System, error is reduced to simplify to calculate, upstream output of power station-generating flow relation is described using piecewise linear function：
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<msub>
<mi>P</mi>
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<mi>u</mi>
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<mi>t</mi>
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</msub>
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<mi>a</mi>
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<mi>u</mi>
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<msubsup>
<mi>Q</mi>
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<mi>u</mi>
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<mi>t</mi>
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</msubsup>
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<msubsup>
<mi>b</mi>
<mrow>
<mi>u</mi>
<mo>,</mo>
<mi>t</mi>
</mrow>
<msub>
<mi>k</mi>
<mi>u</mi>
</msub>
</msubsup>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>6</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, kuNumbered for piecewise interval,Respectively sectional linear fitting parameter, mainly by preceding water in period t
Position, comprehensive power factor, and the incidence coefficient of tailwater level, the loss of flood peak and letdown flow determine；Generated electricity for upstream power station
Flow, it is assumed that, to be put in storage balance mode operation, ignore the water level of the frontal pool fluctuation, letdown flow is without/daily regulated hydroplant in downstream
Upstream power station aerial drainage and local inflow, the piecewise linear function being also indicated as on letdown flow of contributing：
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<mi>a</mi>
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<mi>d</mi>
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<mi>u</mi>
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<mo>,</mo>
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<mrow>
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<mi>d</mi>
</msubsup>
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<mo>)</mo>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msubsup>
<mi>d</mi>
<mrow>
<mi>d</mi>
<mo>,</mo>
<mi>t</mi>
</mrow>
<msub>
<mi>k</mi>
<mi>d</mi>
</msub>
</msubsup>
</mrow>
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</mtr>
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<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>7</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein,Sectional linear fitting parameter respectively in period t,For downstream water power plant discharge, by formula
(7) substituting into formula (8) can obtain：
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<mtable>
<mtr>
<mtd>
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>d</mi>
<mo>,</mo>
<mi>t</mi>
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<mi>a</mi>
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<mi>d</mi>
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<mi>k</mi>
<mi>d</mi>
</msub>
</msubsup>
<mo>&CenterDot;</mo>
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<mrow>
<msub>
<mi>I</mi>
<mrow>
<mi>d</mi>
<mo>,</mo>
<mi>t</mi>
</mrow>
</msub>
<mo>+</mo>
<msup>
<mi>e</mi>
<mi>&gamma;</mi>
</msup>
<mo>&CenterDot;</mo>
<mfenced open = "(" close = ")">
<mtable>
<mtr>
<mtd>
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<mo>(</mo>
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</mrow>
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</mrow>
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<mi>d</mi>
</msub>
</msubsup>
<mo>&CenterDot;</mo>
<mrow>
<mo>(</mo>
<msub>
<mi>I</mi>
<mrow>
<mi>i</mi>
<mo>,</mo>
<mi>t</mi>
</mrow>
</msub>
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<msup>
<mi>e</mi>
<mi>&gamma;</mi>
</msup>
<mo>&CenterDot;</mo>
<mo>(</mo>
<mrow>
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<mi>Q</mi>
<mrow>
<mi>u</mi>
<mo>,</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>&tau;</mi>
<mrow>
<mi>u</mi>
<mo>,</mo>
<mi>d</mi>
</mrow>
</msub>
</mrow>
<mi>d</mi>
</msubsup>
<mo>-</mo>
<msubsup>
<mi>b</mi>
<mrow>
<mi>u</mi>
<mo>,</mo>
<mi>t</mi>
</mrow>
<msub>
<mi>k</mi>
<mi>u</mi>
</msub>
</msubsup>
<mo>/</mo>
<msubsup>
<mi>a</mi>
<mrow>
<mi>u</mi>
<mo>,</mo>
<mi>t</mi>
</mrow>
<msub>
<mi>k</mi>
<mi>u</mi>
</msub>
</msubsup>
</mrow>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msubsup>
<mi>b</mi>
<mrow>
<mi>d</mi>
<mo>,</mo>
<mi>t</mi>
</mrow>
<mi>k</mi>
</msubsup>
</mrow>
</mtd>
</mtr>
</mtable>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>8</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein,It is preset parameter, Id,t、For input quantity, formula (9) is represented by：
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>d</mi>
<mo>,</mo>
<mi>t</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>&alpha;</mi>
<mi>t</mi>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>P</mi>
<mrow>
<mi>u</mi>
<mo>,</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>&tau;</mi>
<mrow>
<mi>u</mi>
<mo>,</mo>
<mi>d</mi>
</mrow>
</msub>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>&beta;</mi>
<mi>t</mi>
</msub>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>9</mn>
<mo>)</mo>
</mrow>
</mrow>
Formula (10) is upstream and downstream Power Station power coupled relation, αt、βtFor the coefficient of coup：
<mrow>
<mfenced open = "{" close = "">
<mtable>
<mtr>
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Upstream power station is put down the withered phase and run in a manner of nothing abandons water,If the wet season abandons water, upstream full plant goes out
Power, water is steadily abandoned, without considering current time lag and flow line smoothization, i.e. τu,d=0, eγ=1.
5. the ahead market as claimed in claim 4 based on step power station coupled relation goes out clear mechanism system, its feature exists
In：Trade center passes through in the step 2WithWater-carrying capacity, downstream electrical are abandoned in parameter, and upstream power station
The data for local inflow of standing, substitute into formula (11) and determine upstream power station electric power coefficient of coup αt, the lower station electric power coefficient of coup
βt, to embody the special consideration to step upstream and downstream power station electric power coupled relation, capacity section, section valency are declared into upstream power station, and
The corresponding coupled section capacity in lower station individually describes in clear Optimized model is gone out a few days ago：
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Wherein, Jud,tThe income that generates electricity is ready in period t for step upstream power station, downstream power station； Respectively
It is upstream power station in period t, t- τu,dInner capacities section kGAcceptance of the bid capacity, each capacity section acceptance of the bid capacity in each Power Generation day part
As optimized variable.
6. the ahead market as claimed in claim 5 based on step power station coupled relation goes out clear mechanism system, its feature exists
In：The constraints for going out clear Optimized model a few days ago includes：
1. downstream water output of power station constrains, consider that lower station reservoir inflow crosses the situation of water diversion flow limitation, formula (10)
It is expressed as：
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Wherein,For lower station EIAJ, minimum load；
2. acceptance of the bid capacitance balance constraint representation is：
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7. the ahead market as claimed in claim 5 based on step power station coupled relation goes out clear mechanism system, its feature exists
In：After receiving each market member quotation information, trade center will be carried out out clearly according to above-mentioned Optimized model, the ahead market
Go out clear stream journey to comprise the following steps：
1) upstream power station reports capacity section and section valency, current reservoir level, abandons water-carrying capacity, and lower station reports local inflow bent
Line, piecewise linearity parameter
2) trade center determines piecewise linearity parameter according to the current reservoir level in upstream power station
3) trade center calculates upstream power station and lower station electric power coefficient of coup at、βt；
4) power purchase business and other generating Biddings, it is clear that trade center completes going out for the ahead market；
5) trade center announces out clear electricity price and acceptance of the bid capacity.
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| CN108388968A (en) * | 2018-03-20 | 2018-08-10 | 云南电网有限责任公司玉溪供电局 | Generation schedule based on pre- bid deviation electric quantity balancing mechanism rolls method of adjustment |
| CN109190951A (en) * | 2018-08-21 | 2019-01-11 | 广东电网有限责任公司 | A kind of electricity market goes out clearing method, goes out clear device and clear equipment out |
| CN109802445A (en) * | 2018-12-28 | 2019-05-24 | 国网山西省电力公司电力科学研究院 | A kind of multicomputer coordinated scheduling method considering transmission of electricity section capacity limit |
| CN110472826A (en) * | 2019-07-09 | 2019-11-19 | 大连理工大学 | A kind of step power station load variations real-time adaptive method considering daily electricity deviation |
| CN110555590A (en) * | 2019-07-31 | 2019-12-10 | 云南电网有限责任公司 | secondary clearing method for watershed cascade upstream and downstream power stations participating in electric power spot market |
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| CN109190951A (en) * | 2018-08-21 | 2019-01-11 | 广东电网有限责任公司 | A kind of electricity market goes out clearing method, goes out clear device and clear equipment out |
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| CN110555590A (en) * | 2019-07-31 | 2019-12-10 | 云南电网有限责任公司 | secondary clearing method for watershed cascade upstream and downstream power stations participating in electric power spot market |
| CN110570008A (en) * | 2019-07-31 | 2019-12-13 | 云南电网有限责任公司 | Day-ahead market clearing method for full acquisition of power generation of down-stream power station in drainage basin cascade |
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