CN106786790B - A kind of provincial power network of aqueous bottle coal nuclear power more power supply coordinated scheduling methods for a long time - Google Patents

A kind of provincial power network of aqueous bottle coal nuclear power more power supply coordinated scheduling methods for a long time Download PDF

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CN106786790B
CN106786790B CN201611031880.4A CN201611031880A CN106786790B CN 106786790 B CN106786790 B CN 106786790B CN 201611031880 A CN201611031880 A CN 201611031880A CN 106786790 B CN106786790 B CN 106786790B
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power
unit
electricity
load
typical
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CN106786790A (en
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周华
程春田
李颖毅
孙立飞
朱炳铨
郭锋
陆春良
吴华华
吴臻
张俊
黄静
占震滨
张静
黄锦华
申建建
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Dalian University of Technology
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
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Dalian University of Technology
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]

Abstract

A kind of provincial power network of aqueous bottle coal nuclear power more power supply coordinated scheduling methods for a long time, are related to hydrothermal generation scheduling field.The uncertainty of load is higher in long-term dispatch at present, and long-term dispatch scheme is mutually isolated with short term scheduling solution formulation process, it is difficult to realize expected benefit.The present invention is association tie with moon electric quantity balancing and typical day balance of electric power and ener, it constructs the overall of the long-term coordinated scheduling of more power supplys and solves frame, water power optimizes calculating with the typical minimum target of daily load peak-valley ratio, pneumoelectric and thermoelectricity use the improved long-term electricity of quantity division method coordinated allocation, nuclear power undertakes power grid base lotus by generating capacity, and water, gas, coal, each power supply typical case daily load process of core are successively determined by regulating power using gradually cutting load, by stepping up pneumoelectric minimum amount of power ratio, iteration realizes typical daily load balance.The technical program can couple the constraint of provincial power network shot and long term load, formulate the long-term dispatch scheme for taking into account the short-term peak regulation demand of power grid.

Description

A kind of provincial power network of aqueous bottle coal nuclear power more power supply coordinated scheduling methods for a long time
Technical field
The present invention relates to the long-term power generation dispatching field of electric system more particularly to a kind of provincial power networks of aqueous bottle coal nuclear power Long-term more power supply coordinated scheduling methods.
Background technique
The purpose of power system optimal dispatch is to pass through all kinds of electricity of reasonable arrangement under the premise of guaranteeing electricity net safety stable The generation schedule in source, the operating cost for keeping electric system total reduce, and to obtain good economic benefit, substantially belong to complexity Constrained nonlinear systems problem.With the raising of network load level, the increase of load peak-valley difference, the complexity of net interior power ingredient Change, electric power system dispatching difficulty also increases accordingly.
Electric system long-term dispatch method according to fairness and economy stress difference be broadly divided into " three is public " scheduling and Two kinds of energy-saving distribution, since the uncertainty of load in long-term dispatch is higher, previous scheduling scheme is often difficult to obtain preferable As a result, and because Working Out The Scheme does not take into account long-term electrical demand and long-term typical day electricity needs, long-term dispatch scheme It is mutually isolated with short term scheduling solution formulation process, causes prepared long-term dispatch scheme during rolling execution, it is short Phase scheduling is difficult to be applicable in, and is difficult to execute, it is necessary to which, by continuous amendment, excessive amendment is so that long-term dispatch scheme is difficult to Realize expected benefit.
For the deficiency in above-mentioned long-term dispatch Working Out The Scheme, have some scholars from the angle of typical daily load demand Degree carried out research to single supply long-term dispatch, however there has been no the correlation techniques for being directed to entire electric power system dispatching, especially For the electric system of aqueous, gas, four kinds of coal, nuclear power power supplys.The workload demand of electric system shot and long term how is coordinated, is studied The electric system long-term dispatch method for considering typical daily load process, alleviates electric system in long-term generation schedule compilation process Short-term peak regulation pressure has become theory and practice project urgently to be resolved in electric power system dispatching.Achievement of the present invention relies on country certainly The right great plan emphasis of science fund supports project (91547201) and state natural sciences fund general project (51579029), Using the water transfer of Zhejiang power grid system, gas, coal, the multiple power sources coordination problem such as core as background, invents and be very practical and extensively The provincial power network of promotional value more power supply coordinated scheduling methods for a long time.
Summary of the invention
The technical problem to be solved in the present invention and the technical assignment of proposition are to be improved and improved to prior art, A kind of provincial power network of aqueous bottle coal nuclear power more power supply coordinated scheduling methods for a long time are provided, the long-term electricity of power grid is taken into account to reach and needs It asks and the peak regulation demand of typical day, coupling power grid shot and long term load constraint alleviates power-system short-term tune from long-term angle Peak pressure power realizes the reasonable disposition of net interior power generated energy, to cope with day miscellaneous increasingly network load demand, and obtains good The purpose of economic benefit.For this purpose, the present invention takes following technical scheme.
1, a kind of provincial power network of aqueous bottle coal nuclear power more power supply coordinated scheduling methods for a long time, it is characterised in that including following Step:
1) establish provincial power network more power supply coordinated scheduling mathematical models for a long time, initialize design conditions, including water, gas, coal, The service condition and constraint of four class power station of core and unit, power grid monthly average load process and each moon typical case daily load process；
2) nuclear power unit year generating capacity is determined, and with this using as its each moon generation schedule；By each moon electrical demand And typical daily electricity demand percentage calculates nuclear power typical case daily electricity；And determine that nuclear power unit typical day is each in gradually cutting load method Period power output；The power grid residue load for deducting nuclear power unit monthly average power output at this time is calculated, nuclear power unit each moon typical day is deducted The typical day residue load of the power grid of power output；
3) it establishes with the mathematical modulo of the GROUP OF HYDROPOWER STATIONS dry season typical day minimum target of residue load peak-valley ratio maximum value Type optimizes scheduling to GROUP OF HYDROPOWER STATIONS in netting, and by each moon power energy allocation in power station to typical case's day, with water power gradually cutting load Method determines typical day power station day part power output；It is updated according to gained power station monthly average power output and its each moon typical case daily output Power grid residue load and typical day residue load at this time；
4) the minimum scale β that each moon generated energy of pneumoelectric accounts for remaining lack of equilibrium electricity is set according to pneumoelectric unit operation demand；
5) with ratio beta by power grid lack of equilibrium power energy allocation to pneumoelectric and coal motor group, be calculated as WqiAnd Wmei；
6) by pneumoelectric year total electricity Wqi, the annual total electricity W of coal electricitymeiIt distributes to each moon in unit year；
7) the booting unit of pneumoelectric typical day is determined, and by the monthly electricity of pneumoelectric unit monthly electricity and typical daily electricity ratio Example distributes to booting unit, balances typical day residue load using pneumoelectric double shift cutting load method, determines that typical day is each with this Period unit output updates monthly average residue load and typical day residue load；
8) the booting unit of coal electricity typical day is determined, and by each monthly electricity of coal motor group monthly total electricity and typical day Pro rate is measured to booting unit, typical day residue load is balanced using coal cutting load method, when determining that typical day is each with this Section unit output updates monthly average residue load and typical day residue load；
9) so far if typical daily load can not balance, increase pneumoelectric total electricity accounting β, enable β=β+Δ β, the resetting moon is flat Residue load and typical day residue load, repeat step 4) -9), until typical daily load balance, exports each unit and sends out for a long time Electricity plan and typical daily trading planning.
The present invention relates to hydrothermal generation scheduling field, the provincial power network for disclosing a kind of aqueous bottle coal nuclear power is more for a long time Power supply coordinated scheduling method, its main feature is that power grid typical case daily load characteristic is considered in long-term coordination optimization scheduling, to meet electricity The balancing the load demand of net long term power electric quantity balancing and typical day.Its technical solution are as follows: for the province of aqueous, gas, coal, nuclear power Complicated electric power system dispatching problem is decomposed into multiple subproblems by power supply type, and is directed to specific type power supply by grade power grid It is solved using suitable strategy and method, while being association tie, coupling with moon electric quantity balancing and typical day balance of electric power and ener Preceding method constructs the overall of the long-term coordinated scheduling of more power supplys and solves frame.In this frame, water power is with typical daily load peak valley The minimum target of rate optimizes calculating, and pneumoelectric and thermoelectricity use the improved long-term electricity of quantity division method coordinated allocation, Nuclear power undertakes power grid base lotus by generating capacity, and successively determines water, gas, coal, each electricity of core by regulating power using gradually cutting load Source typical case's daily load process, by stepping up pneumoelectric minimum amount of power ratio, iteration realizes typical daily load balance.The present invention can The constraint of provincial power network shot and long term load is coupled, the long-term dispatch scheme for taking into account the short-term peak regulation demand of power grid is formulated.
As further improving and supplementing to above-mentioned technical proposal, the invention also includes following additional technical features.
Further, in step 2), generating capacity distributes electricity, calculation formula to nuclear power per year are as follows:
Whe n=Nhe×(tn-t′n)
Because nuclear power unit peak modulation capacity is poor, the base lotus of typical day is mainly undertaken, therefore its typical daily load determines formula are as follows:
N is month number, W in formulahe nFor nuclear power unit the n-th monthly plan electricity, NheFor nuclear power unit installation, tnIt is n-th month Total time, t 'nFor the repair time of n-th month nuclear power unit；For n-th month typical case tdPeriod nuclear power unit power output；
So far the remaining load that power grid monthly average load deducts nuclear power monthly average power output can be found out, power grid each moon typical day is negative The typical day residue load of lotus deduction each moon typical case daily output of nuclear power.
Further, it in step 3), establishes with GROUP OF HYDROPOWER STATIONS dry season typical case daily load peak-valley ratio maximum value most The small mathematical model for target, objective function are as follows:
The constraint of GROUP OF HYDROPOWER STATIONS includes:
(1) water balance:
Vm,t+1=Vm,t+(Qm,t-qm,t-qdm,t)Δt
(2) water level control demand:
Zm,T=Z 'm
(3) the generating flow upper limit:
(4) storage outflow constrains:
(5) reservoir level constrains:
(6) output of power station limits:
In formula: t indicates the period of long-term dispatch, and T indicates entire dispatching cycle, T2Indicate water power with withered in dispatching cycle Month phase gathers, and Cday indicates power grid typical case daily load, pdaymaxIndicate the typical day maximum output of hydroelectric system, pdayminIt indicates Hydroelectric system typical case's day minimum load；M indicates power station number, and t indicates scheduling slot number；Vm,tIndicate power station m period t's Storage capacity；Qm,tIndicate reservoir inflow of the power station m in period t, qm,tIndicate power station m in the generating flow of period t；qdm,tIndicate power station Abandoning water flow of the m in period t；Δ t indicates t period hourage；Zm,TIndicate power station m in the water level of dispatching cycle Mo；It indicates The generating flow upper limit of the power station m in period t；Sm,tIndicate power station m period t storage outflow,WithDivide than indicating electricity Stand m period t storage outflow bound；Zm,tIndicate that power station m goes out reservoir level in period t,WithDivide than indicating electricity Stand m period t reservoir level bound；Pm,tIndicate power station m period t power output,WithPoint than indicate power station m when The bound of the power output of section t.
Further, in the number to the GROUP OF HYDROPOWER STATIONS dry season typical day minimum target of residue load peak-valley ratio maximum value Model is learned when being solved, using successive optimization and discrete differential dynamic programming algorithm, by progressive optimal algorithm by the multistage Decision problem is decomposed into multiple two stages subproblems by the period, introduces discrete differential Dynamic Programming in the solution of each subproblem and calculates Method；The calculating cycle of Optimal Scheduling of Multi-reservoir System is first determined before calculating, and will be separated into t period by period scale in the period, every two The corresponding subproblem of a adjacent time interval；By taking the subproblem solution procedure of t and t+1 period as an example: will have medium-term and long-term modulability The power station of energy is grouped according to river and calculates, and fixes the first water level of first group of power station t periodWith the last water level of t+1 period With the storage outflow of t periodFor decision variable, using water balance equation as state transition equation, according to the step-length ε of setting, Each power station in n-th groupOne group of storage outflow discrete point is respectively obtained up and down, is obtained 3 storage outflow numerical value and is denoted as It is allCombination have 3MnA state；Successively in b=1 ..., 3MnWhen according to Upstream and downstream sequence is calculated: calculating its discrete state number and t period storage outflow, t period constant current to the power station in grouping Amount is adjusted, and the t+1 period determines water level regulation calculating；Water level tune is determined to the power station progress t and t+1 period for being grouped outer reservoir inflow variation Section；The typical daily load method of salary distribution that the t and t+1 period is updated in gradually cutting load method, obtains objective function and penalty The difference of value；After whole state computations, optimum combination position is obtainedAnd power station t period storage outflow in being grouped, by same Method calculating is adjusted, complete an optimizing；Next group of power station optimizing is then carried out until all groups are completed to optimize, instead Multiple iteration is until subproblem is restrained, and so far a sub- problem solving terminates；Next subproblem is solved in chronological order, until all Subproblem, which solves, to terminate, and iterates until objective function is restrained.
Further, when with water power, gradually cutting load method determines typical day power station day part power output, including it is following Step:
301) by power station according to installed capacity from greatly to small sequence；
302) each power station successively participates in balancing, and calculates the maximum value for facing moment typical day residue load, and subtract with this value The maximum available for going to the power station is its initialization position；
303) on the contrary operating position is raised if the daily electricity in the power station is greater than given value, then reduce operating position, general Operating position and operating position add the sharing of load between maximum available to the unit；
304) constantly repeat step 303), average output that step-length takes the power station to be assigned to and given average output it Difference, until the average output that is assigned to of power station is equal with given average output or the operating position in power station reaches extreme lower position.
Further, in step 5), power grid lack of equilibrium power energy allocation includes: to the step of pneumoelectric and coal motor group
501) all units of pneumoelectric and the respective annual total electricity of all units of coal electricity are determined；
502) by two class unit year total electricity decompose each unit each moon, calculate each moon Contract generation of unit；
503) by each moon quantity division of each unit to typical day；
504) all units of pneumoelectric and coal electricity all unit respective years are redistributed if typical case's daily load can not balance Total electricity is spent, and repeats 502) -504) step.
Further, in step 6), the annual total electricity W of coal electricitymeiDistribution to including: the step of each moon in unit year
601) according to annual electric quantity balancing equation, consider that capacity is differential, annual screening reward and desulphurization denitration reward calculate Power grid year, coal motor group averagely utilized hourage X；
Each unit annual contract electricity is calculated by average gas-to electricity hourage X
Wm=(X+TR+Tm+Tn)×PmM=1,2,3 ... M
M indicates that machine group #, M indicate the total number of units of unit in formula, and X indicates that the whole network is averaged gas-to electricity hourage, TmIt indicates M platform unit annual screening rewards gas-to electricity hourage, TRIndicate m platform unit capacity differential reward gas-to electricity hour Number, PmIndicate the power generation capacity of corresponding unit；N indicates that desulphurization denitration machine group #, N indicate the total number of units of desulphurization denitration unit, TnThe N platform generator set desulfurization denitration examination reward gas-to electricity hourage, PnIndicate the power generation capacity of corresponding unit；WmeiIndicate that coal electricity is left Right unit total electricity, WmIndicate m platform unit annual contract electricity；
602) do not consider maintenance constraint, monthly load proportion is by each unit year quantity division to the moon, power energy allocation formula It is as follows:
M indicates that machine group #, t indicate month number, W in formulamt' indicate m platform unit t month generated energy, WmIndicate m platform Unit year total electricity, QtIndicate t month power grid electric demand, Q indicates annual power grid electric aggregate demand；
603) maintenance and annual electric quantity balancing constraint are considered, by unit maintenance month electricity in each moon generating capacity ratio point Dispensing other months of the unit each moon electricity of unit is corrected, account load balancing constraints are destroyed at this time；It is as follows to distribute formula:
C in formulatIndicate maintenance after t month all units always imbalance electricity, Cm,tIndicate the m platform unit t month uneven electricity Amount, Wmt 1Indicate m platform unit t month generated energy after correcting；
604) consider monthly account load balancing constraints, carry out electricity in unit dimension and redistribute, carry out second of electricity and repair Just, monthly electric quantity balancing constrains and is met after distribution, and unit annual contract Constraint will no longer satisfy；Enable t0=1, to one Month, electricity was first modified, and correction formula is as follows:
Know of that month deviation electricity are as follows:
T in formula0Indicate electricity amendment month number,Indicate t0Month all unit total power generations,It indicates secondary to repair Just preceding m platform unit t0Month generated energy, Wm,t0 2M platform unit t after expression second-order correction0Month generated energy；Indicate secondary M platform unit t after amendment0Month contract imbalance electricity；
605) third time amendment is carried out to electricity on time dimension；Guarantee t0Electricity before month is constant, by t0Month it is inclined Poor power energy allocation is to t0Month afterwards；It is as follows to distribute formula:
W in formulam,t 3Indicate m platform unit t month generated energy after correcting three times, t > t0；
606) t is enabled0=t0+ 1, the 3rd, 4 steps are repeated, the period later is successively modified, is adapted to November always；12nd The modification method of the moon slightly has difference, its deviation electricity is reassigned to the 1-11 month；
607) step 603) -605 is repeated), until meeting precision.
Further, when step 7) determines the booting unit of pneumoelectric typical day, advanced promoting the circulation of qi need to be first needed to establish shutdown by cable excellent Change, using unit ratio of minimum load to maximum load as startup-shutdown evaluation index, comprising the following steps:
701) according to the ratio of monthly average load and typical per day load, by each unit power energy allocation of pneumoelectric to typical case Day, determine each moon typical case daily electricity of pneumoelectric unit；
702) pneumoelectric unit is divided into N group according to ownership power station, unit sorts from small to large according to installed capacity in each group；
703) setting pneumoelectric booting unit ratio of minimum load to maximum load constrains λ；
704) n=1, i=1 are enabled, and all units are set as being switched on；
705) n group power station booting unit load rate λ ' is calculated, if λ ' > λ and n+1 < N, enable n=n+1, then enable i=1, And repeat step 705)；If λ ' > λ and n+1=N calculate completion and exit；If λ ' < λ, enables i=i+1, goes to step 706)；
706) unit in n-th group power station is traversed, shuts down its i-th pneumoelectric unit, and the allusion quotation that unit will be shut down Type daily electricity gives other booting units in power station according to installed capacity ratio, goes to step 705).
Further, when step 8) determines the booting unit of coal electricity typical day, referred to using being switched on unit capacity as evaluation Mark, comprising the following steps:
801) according to monthly average load and typical per day load proportion, by each unit power energy allocation of coal electricity to typical day, Determine each moon typical case daily electricity of coal motor group；
802) coal motor group is divided into N group according to ownership power station, unit sorts from small to large according to installed capacity in each group；
803) n=1, i=1 are enabled, and all units are set as being switched on；
804) all booting unit capacities and α are calculated, typical Daily treatment cost is with pmaxIt indicates, spare capacity is p ', pzong =p '+pmaxIf α < pzong, then the unit booting of i-th, n-th of power station is set, and calculating terminates；If α > pzong, then go to step 805)；
805) the unit sum in n-th of power station is that I shuts down i-th, n-th of power station unit, enable n=n+1 if i < I； If i=I enables n=n+1；
806) 804) if n < N, goes to step；If n=N enables n=1, i=i+1, go to step 804).
The utility model has the advantages that the technical program can realize complicated electric power system dispatching problem is decomposed by power supply type it is multiple Subproblem, and solved for specific type power supply using the strategy and method being suitble to, while with moon electric quantity balancing and typical day Power electric quantity balancing is association tie, and coupling preceding method constructs the overall of the long-term coordinated scheduling of more power supplys and solves frame.In this frame In frame, water power optimizes calculating with the typical minimum target of daily load peak-valley ratio, and pneumoelectric and coal electricity use improved electricity The long-term electricity of decomposition method coordinated allocation, nuclear power undertake power grid base lotus by generating capacity, and using gradually cutting load by adjusting energy Power successively determines water, gas, coal, each power supply typical case daily load process of core, and by stepping up pneumoelectric minimum amount of power ratio, iteration is real Existing typical case's daily load balance.The prior art is compared, the present invention has coupled the constraint of provincial power network shot and long term load, can be used for formulating simultaneous Care for the power grid long-term dispatch scheme of the short-term peak regulation demand of power grid.
Detailed description of the invention
Fig. 1 is that the method for the present invention totally solves flow chart；
Fig. 2 is that GROUP OF HYDROPOWER STATIONS solves flow chart；
Fig. 3 is all kinds of electric quantity of power supply balance result figures of simulation example；
Fig. 4 is all kinds of power supply typical case daily load balance result figures of simulation example.
Specific embodiment
Technical solution of the present invention is described in further detail below in conjunction with Figure of description.
The present invention relates to a kind of provincial power network of aqueous bottle coal nuclear power more power supply coordinated scheduling methods for a long time, below with reference to attached The invention will be further described with example for figure.
Electric system long-term dispatch plan engineering in practice be establishment power grid year generation schedule, compilation process by Network load characteristic, the factors such as power supply installation situation, power station regimen, unit maintenance influence, and mainly include three levels The problem of: first is that power grid year total electricity is decomposed each unit, second is that by each unit year quantity division to each moon, third is that by each The unit moon, quantity division was to typical day.In addition, needing to readjust annual power energy allocation if typical day electric power can not balance.
Aqueous, gas, coal, nuclear power provincial power network more power supply coordinated scheduling problems are that extremely complex electric system is excellent for a long time Change scheduling problem, larger difficulty would generally be faced by constructing the unified method for solving of these power supplys.For this purpose, with reference to common Hydro-Thermal Systems Coordinate solution throughway, is that multiple subproblems solve, and are directed to certain types of power supply by former PROBLEM DECOMPOSITION, in classic optimisation On the basis of algorithm, suitable highly efficient practical improvement strategy and method for solving are found, while considering moon electric quantity balancing and allusion quotation Type day balance of electric power and ener is association tie, and coupling preceding method forms the overall of the long-term coordinated scheduling of more power supplys and solves frame, It is as shown in Figure 1 to solve flow chart.All kinds of long-term generation schedule order of presentation of power supply are followed successively by nuclear power, water power, pneumoelectric, coal electricity.Core The clean energy resource that belongs to of electricity and water power, power grid should dissolve the electricity of two kinds of power supplys, pneumoelectric and coal electricity as far as possible and make in " three is public " constraint Under about, long-term generation schedule needs emphasis to consider the long-term remaining load of balance and the remaining load of long-term typical day.
The long-term generation schedule preparation method of nuclear power:
Generating capacity distributes electricity, calculation formula to nuclear power per year are as follows:
Whe n=Nhe×(tn-t′n) (1)
Because nuclear power unit peak modulation capacity is poor, the base lotus of typical day is mainly undertaken, therefore its typical daily load determines formula are as follows:
N is month number in formula,For nuclear power unit the n-th monthly plan electricity, NheFor nuclear power unit installation, tnIt is n-th month Total time, t 'nFor the repair time of n-th month nuclear power unit；For n-th month typical case tdPeriod nuclear power unit power output.
So far the remaining load that power grid monthly average load deducts nuclear power monthly average power output can be found out, power grid each moon typical day is negative The typical day residue load of lotus deduction each moon typical case daily output of nuclear power.
The long-term generation schedule preparation method of GROUP OF HYDROPOWER STATIONS:
Water power is good peaking power source, therefore the method for the present invention is taken into account during establishment GROUP OF HYDROPOWER STATIONS long-term generation schedule The long-term electricity of power grid and typical day electricity needs, establish with GROUP OF HYDROPOWER STATIONS dry season typical case daily load peak-valley ratio maximum value The mathematical model of minimum target: objective function is as follows:
The constraint of GROUP OF HYDROPOWER STATIONS includes:
(1) water balance:
Vm,t+1=Vm,t+(Qm,t-qm,t-qdm,t)Δt (4)
(2) water level control demand:
Zm,T=Z 'm (5)
(3) the generating flow upper limit:
(4) storage outflow constrains:
(5) reservoir level constrains:
(6) output of power station limits:
In formula: t indicates the period of long-term dispatch, and T indicates entire dispatching cycle, T2Indicate water power with withered in dispatching cycle Month phase gathers, and Cday indicates power grid typical case daily load, pdaymaxIndicate the typical day maximum output of hydroelectric system, pdayminIt indicates Hydroelectric system typical case's day minimum load.M indicates power station number, and t indicates scheduling slot number；Vm,tIndicate power station m period t's Storage capacity；Qm,tIndicate reservoir inflow of the power station m in period t, qm,tIndicate power station m in the generating flow of period t；qdm,tIndicate power station Abandoning water flow of the m in period t；Δ t indicates t period hourage；Zm,TIndicate power station m in the water level of dispatching cycle Mo；It indicates The generating flow upper limit of the power station m in period t；Sm,tIndicate power station m period t storage outflow,WithDivide than indicating electricity Stand m period t storage outflow bound；Zm,tIndicate that power station m goes out reservoir level in period t,WithDivide than indicating electricity Stand m period t reservoir level bound；Pm,tIndicate power station m period t power output,WithPoint than indicate power station m when The bound of the power output of section t.
Its method for solving uses successive optimization and discrete differential dynamic programming algorithm, by progressive optimal algorithm by the multistage Decision problem is decomposed into multiple two stages subproblems by the period, introduces discrete differential Dynamic Programming in the solution of each subproblem and calculates Method.The calculating cycle of Optimal Scheduling of Multi-reservoir System is first determined before calculating, and will be separated into t period by period scale in the period, every two The corresponding subproblem of a adjacent time interval.By taking the subproblem solution procedure of t and t+1 period as an example: will have medium-term and long-term modulability The power station of energy is grouped according to river and calculates, and fixes the first water level of first group of power station t periodWith the last water level of t+1 period With the storage outflow of t periodFor decision variable, using water balance equation as state transition equation, according to the step-length ε of setting, Each power station in n-th groupOne group of storage outflow discrete point is respectively obtained up and down, is obtained 3 storage outflow numerical value and is denoted asIt is allCombination have 3MnA state.Successively in b=1 ..., 3MnWhen according to Upstream and downstream sequence is calculated: calculating its discrete state number and t period storage outflow, t period constant current to the power station in grouping Amount is adjusted, and the t+1 period determines water level regulation calculating；Water level tune is determined to the power station progress t and t+1 period for being grouped outer reservoir inflow variation Section.The typical daily load method of salary distribution that the t and t+1 period is updated in gradually cutting load method, obtains objective function and penalty The difference of value.After whole state computations, optimum combination position is obtainedAnd power station t period storage outflow in being grouped, by same Method calculating is adjusted, complete an optimizing.Next group of power station optimizing is then carried out until all groups are completed to optimize, instead Multiple iteration is until subproblem is restrained, and so far a sub- problem solving terminates.Next subproblem is solved in chronological order, until all Subproblem, which solves, to terminate, and iterates until objective function is restrained.Hydroelectric system derivation algorithm flow chart is as shown in Figure 2.
Gradually cutting load method, key step are as follows using water power for the determination method of power station typical case's daily output:
(1) by power station according to installed capacity from greatly to small sequence；
(2) each power station successively participates in balancing, and calculates the maximum value for facing moment typical day residue load, and subtract with this value The maximum available in the power station is its initialization position；
(3) operating position is raised if the daily electricity in the power station is greater than given value, it is on the contrary then reduce operating position, by work Making position and operating position adds the sharing of load between maximum available to the unit；
(4) step (3) constantly are repeated, the difference of average output and given average output that step-length takes the power station to be assigned to, Until the average output that is assigned to of power station is equal with given average output or the operating position in power station reaches extreme lower position.
After the completion of hydroelectric system optimization, power grid at this time is updated according to power station monthly average power output and its each moon typical case daily output Remaining load and typical day residue load.
Pneumoelectric and the long-term generation schedule preparation method of coal electricity:
Gas-fired station and coal fired power plant belong to thermal power station, because being restricted by " three is public " constraint, must balance power grid residue to be more preferable Load and typical day residue load, they intercouple at generation schedule compilation process.For each pneumoelectric unit of reasonable distribution and coal electricity Assigning process is now divided into four steps by the electricity of unit:
(1) all units of pneumoelectric and the respective annual total electricity of all units of coal electricity are determined.
(2) by two class unit year total electricity decompose each unit each moon, calculate each moon Contract generation of unit.
(3) by each moon quantity division of each unit to typical day.
(4) all units of pneumoelectric and coal electricity all unit respective years are redistributed if typical case's daily load can not balance Total electricity, and repeat (2)-(4) step.
Because pneumoelectric is expensive, to save power grid purchases strategies, under conditions of guaranteeing power grid security, control pneumoelectric is always electric Initial pneumoelectric and the annual total electricity allocation proportion β of coal electricity is arranged in a lower level in amount.Power grid is remained with this pro rate For remaining lack of equilibrium power energy allocation to pneumoelectric and coal electricity, then the electricity that pneumoelectric is assigned to is Wqi=β × W ', the electricity that coal electricity is assigned to are Wmei=(1- β) × W '.
, need to be by annual power energy allocation to each unit after determining two class power supply year electricity, annual quantity division is with as far as possible Keeping each unit close to each other in day part power generation progress is principle, by each unit annual contract quantity division to each moon, with reality Now electric quantity balancing of each moon.
By taking coal motor group as an example, the determination step of each unit annual contract electricity:
(1) according to annual electric quantity balancing equation, consider that capacity is differential, annual screening reward and desulphurization denitration reward calculate electricity It nets annual coal motor group and averagely utilizes hourage X.
Each unit annual contract electricity is calculated by average gas-to electricity hourage X
Wm=(X+TR+Tm+Tn)×PmM=1,2,3 ... M (11)
M indicates that machine group #, M indicate the total number of units of unit in formula, and X indicates that the whole network is averaged gas-to electricity hourage, TmIt indicates M platform unit annual screening rewards gas-to electricity hourage, TRIndicate m platform unit capacity differential reward gas-to electricity hour Number, PmIndicate the power generation capacity of corresponding unit；N indicates that desulphurization denitration machine group #, N indicate the total number of units of desulphurization denitration unit, TnThe N platform generator set desulfurization denitration examination reward gas-to electricity hourage, PnIndicate the power generation capacity of corresponding unit；WmeiIndicate that coal electricity is left Right unit total electricity, WmIndicate m platform unit annual contract electricity.
The determination step of monthly Contract generation:
The process of annual quantity division to the moon are in the item for meeting annual contract Constraint and the constraint of monthly electric quantity balancing Each moon Contract generation of unit is determined under part.The solution of the problem is substantially the solution to a quadratic programming problem, to reduce Difficulty is solved, the method for the present invention improves conventional quantity division method, the specific steps are as follows:
(2) do not consider maintenance constraint, monthly load proportion is by each unit year quantity division to the moon, and power energy allocation formula is such as Under:
M indicates that machine group #, t indicate month number, W in formulamt' indicate m platform unit t month generated energy, WmIndicate m platform Unit year total electricity, QtIndicate t month power grid electric demand, Q indicates annual power grid electric aggregate demand.
(3) maintenance and annual electric quantity balancing constraint are considered, by unit maintenance month electricity in each moon generating capacity ratio point Dispensing other months of the unit each moon electricity of unit is corrected, account load balancing constraints are destroyed at this time.It is as follows to distribute formula:
C in formulatIndicate maintenance after t month all units always imbalance electricity, Cm,tIndicate the m platform unit t month uneven electricity Amount, Wmt 1Indicate m platform unit t month generated energy after correcting.
(4) consider monthly account load balancing constraints, carry out electricity in unit dimension and redistribute, carry out second of electricity and repair Just, monthly electric quantity balancing constrains and is met after distribution, and unit annual contract Constraint will no longer satisfy.Enable t0=1, to one Month, electricity was first modified, and correction formula is as follows:
Know of that month deviation electricity are as follows:
T in formula0Indicate electricity amendment month number,Indicate t0Month all unit total power generations,It indicates secondary to repair Just preceding m platform unit t0Month generated energy,M platform unit t after expression second-order correction0Month generated energy.Indicate secondary M platform unit t after amendment0Month contract imbalance electricity.
(5) third time amendment is carried out to electricity on time dimension.Guarantee t0Electricity before month is constant, by t0Month it is inclined Poor power energy allocation is to t0Month afterwards.It is as follows to distribute formula:
W in formulam,t 3Indicate m platform unit t month generated energy after correcting three times, t > t0；
(6) t is enabled0=t0+ 1, the 3rd, 4 steps are repeated, the period later is successively modified, is adapted to November always.December Modification method slightly have difference, its deviation electricity is reassigned to the 1-11 month.
(7) step (3)-(5) are repeated, until meeting precision.
Determining needs before the typical case's daily output of pneumoelectric station advanced promoting the circulation of qi to establish shutdown optimization by cable, using unit ratio of minimum load to maximum load as opening Evaluation index is shut down, key step is as follows:
(1) according to the ratio of monthly average load and typical per day load, by each unit power energy allocation of pneumoelectric to typical day, Determine each moon typical case daily electricity of pneumoelectric unit；
(2) pneumoelectric unit is divided into N group according to ownership power station, unit sorts from small to large according to installed capacity in each group；
(3) setting pneumoelectric booting unit ratio of minimum load to maximum load constrains λ；
(4) n=1, i=1 are enabled, and all units are set as being switched on；
(5) n group power station booting unit load rate λ ' is calculated, if λ ' > λ and n+1 < N, enable n=n+1, then enable i=1, and It repeats step (5)；If λ ' > λ and n+1=N calculate completion and exit；If λ ' < λ, enables i=i+1, (6) are gone to step；
(6) unit in n-th group power station is traversed, shuts down its i-th pneumoelectric unit, and the typical case that unit will be shut down Daily electricity gives other booting units in power station according to installed capacity ratio, goes to step (5).
Pneumoelectric booting unit typical case sunrise force distribution method using pneumoelectric double shift, gradually adopt with water power by cutting load method, step Gradually cutting load method is similar, and difference is that the main body of water power cutting load is power station, and the main body of pneumoelectric cutting load is unit.
Coal motor group startup-shutdown method, using the unit capacity that is switched on as evaluation index, comprising the following steps:
(1) according to monthly average load and typical per day load proportion, by each unit power energy allocation of coal electricity to typical day, really Determine each moon typical case daily electricity of coal motor group；
(2) coal motor group is divided into N group according to ownership power station, unit sorts from small to large according to installed capacity in each group；
(3) n=1, i=1 are enabled, and all units are set as being switched on；
(4) all booting unit capacities and α are calculated, typical Daily treatment cost is with pmaxIt indicates, spare capacity is p ', pzong =p '+pmaxIf α < pzong, then the unit booting of i-th, n-th of power station is set, and calculating terminates；If α > pzong, then go to step (5)；
The unit sum in (5) n-th of power station is that I shuts down i-th, n-th of power station unit, enable n=n+1 if i < I；If I=I then enables n=n+1；
(6) if n < N, goes to step (4)；If n=N enables n=1, i=i+1, (4) are gone to step；
Coal establish by cable machine unit typical case's sunrise force distribution method using coal electricity gradually cutting load method, step and pneumoelectric use by Secondary cutting load method is similar, and difference is that pneumoelectric unit is typical and is only switched on several periods day that coal motor group booting all the period of time is both needed to Booting need to consider that minimum load constrains.
So far the long-term generation schedule of four class power supplys and its long-term typical daily output plan have completed.Judge power supply allusion quotation Can type daily output balance typical daily load, if so, calculating terminates, output scheme, if it is not, then correcting pneumoelectric and coal electricity year Total electricity allocation proportion β enables β=β+Δ β, re-starts pneumoelectric and the long-term generation schedule of coal electricity is worked out, until typical daily load Balance.
Modeling and solution strategies in conjunction with above-mentioned subproblem, primary complete generation schedule compilation process, according to following steps Suddenly (1)-(9) can be realized:
Step 1. establishes provincial power network more power supply coordinated scheduling mathematical models for a long time, initializes design conditions, including water, Gas, coal, four class power station of core and the service condition and constraint of unit, power grid monthly average load process and each moon typical case daily load mistake Journey.
Step 2. determines nuclear power unit year generating capacity, and with this using as its each moon generation schedule.By each moon electricity Demand and typical daily electricity demand percentage calculate nuclear power typical case daily electricity.And nuclear power unit typical case is determined in gradually cutting load method Day day part power output.The power grid residue load for deducting nuclear power unit monthly average power output at this time is calculated, each moon allusion quotation of nuclear power unit is deducted The typical day residue load of the power grid of type daily output.
Step 3. is established with the number of the GROUP OF HYDROPOWER STATIONS dry season typical day minimum target of residue load peak-valley ratio maximum value Model is learned, scheduling is optimized to GROUP OF HYDROPOWER STATIONS in netting, and each moon power energy allocation in power station is gradually cut to typical day with water power Load method determines typical day power station day part power output.According to gained power station monthly average power output and its each moon typical case daily output Update power grid residue load at this time and typical day residue load.
Step 4. sets the minimum ratio that each moon generated energy of pneumoelectric accounts for remaining lack of equilibrium electricity according to pneumoelectric unit operation demand Example β.
Step 5. with ratio beta by power grid lack of equilibrium power energy allocation to pneumoelectric and coal motor group, be calculated as WqiAnd Wmei。
Step 6. is in improved quantity division method by pneumoelectric year total electricity Wqi, the annual total electricity W of coal electricitymeiDistribution is extremely Each moon in unit year.
Step 7. determines the booting unit of pneumoelectric typical day, and by the monthly electricity of pneumoelectric unit monthly electricity and typical day It measures pro rate and gives booting unit, typical day residue load is balanced using pneumoelectric double shift cutting load method, typical case is determined with this Day day part unit output updates monthly average residue load and typical day residue load.
Step 8. determines the booting unit of coal electricity typical day, and by each monthly electricity of coal motor group monthly total electricity and typical Daily electricity pro rate balances typical day residue load to booting unit, using coal cutting load method, determines typical day with this Day part unit output updates monthly average residue load and typical day residue load.
If so far typical daily load can not balance step 9., increases pneumoelectric total electricity accounting β, enable β=β+Δ β, reset Monthly average residue load and typical day residue load, repeat step (4)-(9), until typical daily load balance, exports each unit Long-term generation schedule and typical daily trading planning.
Now using China's Zhejiang power grid as research object, Zhejiang power grid year generation schedule is made using the method for the present invention, Zhejiang power grid is the important composition ingredient of East China Power Grid, and it includes coal, four kinds of gas and water, nuclear power units, all kinds of electricity that system, which adjusts unit, inside the province Source is installed, and ratio is as shown in table 1, and all kinds of power supply year electric quantity balancing results of simulation example are as shown in figure 3, all kinds of power supply allusion quotations in February Type daily output process is as shown in Figure 4.Analysis is it is found that the method for the present invention passes through association in the case where not considering that area sends power consumption outside The power energy allocation of unit inside the province is adjusted, so that clean energy resource water power is sufficiently dissolved, coal electricity has taken into account year under " three is public " constraint The factors such as performance assessment criteria, discharge index, unit efficiency are spent, while realizing the electricity of power grid year electric quantity balancing and long-term typical day Dynamic balance is conducive to the arrangement of the generation schedule of subsequent smaller scale.Furthermore the method for the present invention is also by pneumoelectric Constraint one A lesser section reduces power grid power purchase expense, has good economy and practicability.
All kinds of power supply installations of 1 Zhejiang power grid of table and accounting table (unit: MW)
More power supply coordinated scheduling methods are tools of the invention to a kind of provincial power network of aqueous bottle coal nuclear power shown in for a long time Body embodiment has embodied substantive distinguishing features of the present invention and progress, needs can be used according to actual, in enlightenment of the invention Under, equivalent modifications, the column in the protection scope of this programme are carried out to it.

Claims (9)

1. a kind of provincial power network of aqueous bottle coal nuclear power more power supply coordinated scheduling methods for a long time, it is characterised in that including following step It is rapid:
1) provincial power network more power supply coordinated scheduling mathematical models for a long time are established, design conditions, including water, gas, coal, core four are initialized The service condition and constraint of class power station and unit, power grid monthly average load process and each moon typical case daily load process；
2) nuclear power unit year generating capacity is determined, and with this using as its each moon generation schedule；By each moon electrical demand and allusion quotation Type daily electricity demand percentage calculates nuclear power typical case daily electricity；And the typical day day part of nuclear power unit is determined in gradually cutting load method Power output；The power grid residue load for deducting nuclear power unit monthly average power output at this time is calculated, each moon typical case daily output of nuclear power unit is deducted The typical day residue load of power grid；
3) it establishes with the mathematical model of the GROUP OF HYDROPOWER STATIONS dry season typical day minimum target of residue load peak-valley ratio maximum value, it is right GROUP OF HYDROPOWER STATIONS optimizes scheduling in netting, and by each moon power energy allocation in power station to typical case's day, in water power gradually cutting load method Determine typical case's day power station day part power output；It is updated at this time according to gained power station monthly average power output and its each moon typical case daily output Power grid residue load and typical day residue load；
4) the minimum scale β that each moon generated energy of pneumoelectric accounts for remaining lack of equilibrium electricity is set according to pneumoelectric unit operation demand；
5) with ratio beta by power grid lack of equilibrium power energy allocation to pneumoelectric and coal motor group, be calculated as WqiAnd Wmei；
6) by pneumoelectric year total electricity Wqi, the annual total electricity W of coal electricitymeiIt distributes to each moon in unit year；
7) the booting unit of pneumoelectric typical day is determined, and monthly electricity and typical daily electricity ratio are divided by the monthly electricity of pneumoelectric unit Dispensing booting unit balances typical day residue load using pneumoelectric double shift cutting load method, determines typical day day part with this Unit output updates monthly average residue load and typical day residue load；
8) the booting unit of coal electricity typical day is determined, and by each monthly electricity of coal motor group monthly total electricity and typical daily electricity ratio Example is assigned to booting unit, balances typical day residue load using coal cutting load method, determines typical day day part machine with this Group power output updates monthly average residue load and typical day residue load；
9) so far if typical daily load can not balance, increase pneumoelectric total electricity accounting β, enable β=β+Δ β, resetting monthly average is surplus Remaining load and typical day residue load, repeat step 4) -9), until typical daily load balance, exports each unit and generate electricity for a long time meter It draws and typical daily trading planning.
2. a kind of provincial power network of aqueous bottle coal nuclear power according to claim 1 more power supply coordinated scheduling methods for a long time, Be characterized in that: in step 2), generating capacity distributes electricity, calculation formula to nuclear power per year are as follows:
Whe t=Nhe×(tl-t′)
Because nuclear power unit peak modulation capacity is poor, the base lotus of typical day is mainly undertaken, therefore its typical daily load determines formula are as follows:
T is month number, W in formulahe tFor nuclear power unit t monthly plan electricity, NheFor nuclear power unit installation, tlIt is total for the t month Time, t ' are the repair time of t month nuclear power unit；Phe d,tFor t month typical case d period nuclear power unit power output；
So far the remaining load that power grid monthly average load deducts nuclear power monthly average power output, each moon typical case daily load button of power grid can be found out Except the typical day residue load of each moon typical case daily output of nuclear power.
3. a kind of provincial power network of aqueous bottle coal nuclear power according to claim 2 more power supply coordinated scheduling methods for a long time, It is characterized in that: in step 3), establishing with the minimum target of GROUP OF HYDROPOWER STATIONS dry season typical case daily load peak-valley ratio maximum value Mathematical model, objective function is as follows:
The constraint of GROUP OF HYDROPOWER STATIONS includes:
(1) water balance:
Vm,t+1=Vm,t+(Qm,t-qm,t-qdm,t)Δt
(2) water level control demand:
Zm,T=Z 'm
(3) the generating flow upper limit:
(4) storage outflow constrains:
(5) reservoir level constrains:
(6) output of power station limits:
In formula: t indicates period namely month number, and T indicates all month length in entire dispatching cycle, and Cday indicates power grid Typical daily load, pdaymaxIndicate the typical day maximum output of hydroelectric system, pdayminIndicate the typical day minimum load of hydroelectric system； M indicates power station number；Vm,tIndicate power station m in the storage capacity of period t；Qm,tIndicate reservoir inflow of the power station m in period t, qm,tIt indicates Generating flow of the power station m in period t；qdm,tIndicate power station m in the abandoning water flow of period t；Δ t indicates t period hourage；Zm,T Indicate calculating water level of the power station m in dispatching cycle Mo, Z'mIndicate power station m in the target water level in the scheduling end of term；Indicate power station m In the generating flow upper limit of period t；Sm,tIndicate power station m period t storage outflow,WithDivide than indicating that power station m exists The storage outflow bound of period t；Zm,tIndicate that power station m goes out reservoir level in period t,WithDivide than indicating that power station m exists The reservoir level bound of period t；Pm,tIndicate power station m period t power output,WithDivide than indicating power station m period t's The bound of power output.
4. a kind of provincial power network of aqueous bottle coal nuclear power according to claim 3 more power supply coordinated scheduling methods for a long time, Be characterized in that: the mathematical model to the GROUP OF HYDROPOWER STATIONS dry season typical day minimum target of residue load peak-valley ratio maximum value into When row solves, using successive optimization and discrete differential dynamic programming algorithm, by progressive optimal algorithm by multistage decision problem Multiple two stages subproblems are decomposed by the period, introduce discrete differential dynamic programming algorithm in the solution of each subproblem；It calculates The preceding calculating cycle for first determining Optimal Scheduling of Multi-reservoir System, and the period it will be separated into t period by period scale, when every two is adjacent The corresponding subproblem of section；By taking the subproblem solution procedure of t and t+1 period as an example: by the power station with medium-term and long-term regulation performance It is grouped and calculates according to river, fix the first water level of first group of power station t periodWith the last water level of t+1 periodWith the t period Storage outflowIt is each in n-th group according to the step-length ε of setting using water balance equation as state transition equation for decision variable Power stationOne group of storage outflow discrete point is respectively obtained up and down, is obtained 3 storage outflow numerical value and is denoted asIt is allCombination have 3MnA state；Successively in b=1 ..., 3MnWhen according to Upstream and downstream sequence is calculated: calculating its discrete state number and t period storage outflow, t period constant current to the power station in grouping Amount is adjusted, and the t+1 period determines water level regulation calculating；Water level tune is determined to the power station progress t and t+1 period for being grouped outer reservoir inflow variation Section；The typical daily load method of salary distribution that the t and t+1 period is updated in gradually cutting load method, obtains objective function and penalty The difference of value；After whole state computations, optimum combination position is obtainedAnd power station t period storage outflow in being grouped, by same Method calculating is adjusted, complete an optimizing；Next group of power station optimizing is then carried out until all groups are completed to optimize, instead Multiple iteration is until subproblem is restrained, and so far a sub- problem solving terminates；Next subproblem is solved in chronological order, until all Subproblem, which solves, to terminate, and iterates until objective function is restrained.
5. a kind of provincial power network of aqueous bottle coal nuclear power according to claim 4 more power supply coordinated scheduling methods for a long time, It is characterized in that: when with water power, gradually cutting load method determines typical day power station day part power output, comprising the following steps:
301) by power station according to installed capacity from greatly to small sequence；
302) each power station successively participates in balancing, and calculates the maximum value for facing moment typical day residue load, and subtract this with this value The maximum available in power station is its initialization position；
303) operating position is raised if the daily electricity in the power station is greater than given value, it is on the contrary then reduce operating position, by work Position and operating position add the sharing of load between maximum available to the unit；
304) step 303) is constantly repeated, the difference of average output and given average output that step-length takes the power station to be assigned to, directly The average output being assigned to power station is equal with given average output or the operating position in power station reaches extreme lower position.
6. a kind of provincial power network of aqueous bottle coal nuclear power according to claim 5 more power supply coordinated scheduling methods for a long time, Be characterized in that: in step 5), power grid lack of equilibrium power energy allocation includes: to the step of pneumoelectric and coal motor group
501) all units of pneumoelectric and the respective annual total electricity of all units of coal electricity are determined；
502) by two class unit year total electricity decompose each unit each moon, calculate each moon Contract generation of unit；
503) by each moon quantity division of each unit to typical day；
504) all units of pneumoelectric are redistributed if typical case's daily load can not balance and all units of coal electricity respective year is total Electricity, and repeat 502) -504) step.
7. a kind of provincial power network of aqueous bottle coal nuclear power according to claim 6 more power supply coordinated scheduling methods for a long time, It is characterized in that: in step 6), the annual total electricity W of coal electricitymeiDistribution to including: the step of each moon in unit year
601) according to annual electric quantity balancing equation, consider that capacity is differential, annual screening reward and desulphurization denitration reward calculate power grid Annual coal motor group averagely utilizes hourage X；
Each unit annual contract electricity is calculated by average gas-to electricity hourage X
Wum=(X+TR+Tum+Tun)×PumUm=1,2,3 ... UM
Um indicates that machine group #, UM indicate the total number of units of unit in formula, and X indicates that the whole network is averaged gas-to electricity hourage, TumIndicate the Um platform unit annual screening rewards gas-to electricity hourage, TRIndicate um platform unit capacity differential reward gas-to electricity hour Number, PumIndicate the power generation capacity of corresponding unit；Un indicates that desulphurization denitration machine group #, UN indicate the total number of units of desulphurization denitration unit, TunUn platform generator set desulfurization denitration examination reward gas-to electricity hourage, PunIndicate the power generation capacity of corresponding unit；WmeiIt indicates Coal electricity left and right unit total electricity, WumIndicate um platform unit annual contract electricity；
602) do not consider maintenance constraint, monthly for load proportion by each unit year quantity division to the moon, power energy allocation formula is as follows:
Um indicates that machine group #, t indicate month number, W in formulaumt' indicate um platform unit t month generated energy, WumIndicate um platform Unit year total electricity, QtIndicate t month power grid electric demand, Q indicates annual power grid electric aggregate demand；
603) consider maintenance and annual electric quantity balancing constraint, unit maintenance month electricity is given by each moon generating capacity pro rate Other months of the unit each moon electricity of unit is corrected, account load balancing constraints are destroyed at this time；It is as follows to distribute formula:
C in formulatIndicate maintenance after t month all units always imbalance electricity, Cum,tIndicate the um platform unit t month uneven electricity, Wumt 1Indicate um platform unit t month generated energy after correcting；
604) consider monthly account load balancing constraints, carry out electricity in unit dimension and redistribute, carry out second of electricity amendment, point It constrains and is met with rear monthly electric quantity balancing, unit annual contract Constraint will no longer satisfy；Enable t0=1, to the January Electricity is first modified, and correction formula is as follows:
Know of that month deviation electricity are as follows:
T in formula0Indicate electricity amendment month number,Indicate t0Month all unit total power generations, Q1Indicate the demand of power grid in January Electricity,Um platform unit t before expression second-order correction0Month generated energy,Um platform unit t after expression second-order correction0 Month generated energy；Um platform unit t after expression second-order correction0Month contract imbalance electricity；
605) third time amendment is carried out to electricity on time dimension；Guarantee t0Electricity before month is constant, by t0The deviation electricity of the moon Amount distributes to t0Month afterwards；It is as follows to distribute formula:
W in formulaum,t 3Indicate um platform unit t month generated energy after correcting three times, t > t0；
606) t is enabled0=t0+ 1, the 3rd, 4 steps are repeated, the period later is successively modified, is adapted to November always；December Modification method slightly has difference, its deviation electricity is reassigned to the 1-11 month；
607) step 603) -605 is repeated), until meeting precision.
8. a kind of provincial power network of aqueous bottle coal nuclear power according to claim 7 more power supply coordinated scheduling methods for a long time, It is characterized in that: when step 7) determines the booting unit of pneumoelectric typical day, needing advanced promoting the circulation of qi to establish shutdown optimization by cable, most with unit Smaller load rate is as startup-shutdown evaluation index, comprising the following steps:
701) according to the ratio of monthly average load and typical per day load, by each unit power energy allocation of pneumoelectric to typical day, really Determine each moon typical case daily electricity of pneumoelectric unit；
702) pneumoelectric unit is divided into N group according to ownership power station, unit sorts from small to large according to installed capacity in each group；
703) setting pneumoelectric booting unit ratio of minimum load to maximum load constrains λ；
704) n=1, i=1 are enabled, and all units are set as being switched on；
705) n group power station booting unit load rate λ ' is calculated, if λ ' > λ and n+1 < N, enable n=n+1, then enable i=1, lay equal stress on Multiple step 705)；If λ ' > λ and n+1=N calculate completion and exit；If λ ' < λ, enables i=i+1, goes to step 706)；
706) unit in n-th group power station is traversed, shuts down its i-th pneumoelectric unit, and the typical day that unit will be shut down Electricity gives other booting units in power station according to installed capacity ratio, goes to step 705).
9. a kind of provincial power network of aqueous bottle coal nuclear power according to claim 8 more power supply coordinated scheduling methods for a long time, It is characterized in that: when step 8) determines the booting unit of coal electricity typical day, using the unit capacity that is switched on as evaluation index, including with Lower step:
801) each unit power energy allocation of coal electricity to typical day is determined according to monthly average load and typical per day load proportion Each moon typical case daily electricity of coal motor group；
802) coal motor group is divided into N group according to ownership power station, unit sorts from small to large according to installed capacity in each group；
803) n=1, i=1 are enabled, and all units are set as being switched on；
804) all booting unit capacities and α are calculated, typical Daily treatment cost is with pmaxIt indicates, spare capacity is p ', pzong=p '+ pmaxIf α < pzong, then the unit booting of i-th, n-th of power station is set, and calculating terminates；If α > pzong, then go to step 805)；
805) the unit sum in n-th of power station is that I shuts down i-th, n-th of power station unit, enable n=n+1 if i < I；If i= I then enables n=n+1；
806) 804) if n < N, goes to step；If n=N enables n=1, i=i+1, go to step 804).
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