CN109586284A - Consider to abandon the sending end electric system random production analog method and application that can be constrained - Google Patents
Consider to abandon the sending end electric system random production analog method and application that can be constrained Download PDFInfo
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- CN109586284A CN109586284A CN201811457091.6A CN201811457091A CN109586284A CN 109586284 A CN109586284 A CN 109586284A CN 201811457091 A CN201811457091 A CN 201811457091A CN 109586284 A CN109586284 A CN 109586284A
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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
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
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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
- 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]
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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
Abstract
Consider to abandon the sending end electric system random production analog method and application that can be constrained the present invention relates to a kind of, 1) random production analog method is the following steps are included: obtain annual load curve, nuclear power whole year power curve is rejected from the annual load curve, lasting load curve is obtained, and the lasting load curve is divided by base lotus, waist lotus, peak load three phases according to annual load level；2) equivalent electric quantity function is established according to the lasting load curve；3) according to equivalent electric quantity, realize that fired power generating unit and Hydropower Unit are controlled in the power output of different phase；4) consider the quotation of clean energy resource and its abandon and can constrain, the power output state of dynamic regulation clean energy resource and fired power generating unit obtains electric system Stochastic Production Simulation data.Compared with prior art, the power generation capacity of abandoning that the present invention considers the clean energy resourcies such as solar energy, wind-powered electricity generation participates in electric system peak regulation as normal power supplies, and safeguards system is minimum to the pollution of environment.
Description
Technical field
The present invention relates to Power System Planning and operation control technology field, consider what abandoning can constrain more particularly, to a kind of
Sending end electric system random production analog method and application.
Background technique
Electric system Stochastic Production Simulation is one of the fundamental analysis tool of Power System Planning and operation, it passes through optimization
The production run of generating set considers the uncertainty of unit failure and load, calculate the generated energy of each power plant, system production at
The reliability index of this and system.Traditionally, nuclear power unit does not participate in peak load regulation network, in terms of this is not due to unit design
Reason, but because of nuclear fuel higher cost, nuclear power proportion is smaller.As the development of nuclear power, wind-powered electricity generation and photovoltaic power generation is built
If only carrying out peak regulation by thermoelectricity and pump-storage generator will be difficult to meet the needs of network load variation, nuclear power unit it is necessary to
Participate in peak load regulation network.On the other hand, abundant using Sichuan as the western China hydroelectric resources of representative, but hydroelectric peak ability by
In the difference of outside weather conditions and power station type, difference is larger, and Hydropower Unit can grow from weak to strong according to regulating power,
Can successively be subdivided into year tune type Hydropower Unit, season tune type Hydropower Unit, day tune type Hydropower Unit, it is necessary to study and simultaneously sufficiently send out
Wave peak modulation capacity of different type unit under the conditions of different weather.Therefore, research includes nuclear power, different type Hydropower Unit etc.
Polymorphic type power supply participates in the electric system random production analog method of peak regulation to reasonable arrangement generation schedule, reduces production cost,
Reliability is improved to be of great significance.
The country has carried out extensive research to Stochastic Production Simulation problem.Chen Yabo, Sheng Ge Hao, Li Jian etc. are in " electric system
And its automation journal " " the electric system Stochastic Production Simulation containing photovoltaic and wind-powered electricity generation " delivered on (2015,27 (05): 1-6)
Based on the random production analog method and wherein processing method of multimode unit, establishes the multimode computation model of photovoltaic.
Meanwhile two kinds of intermittent energies of photovoltaic and wind-powered electricity generation have been handled in conjunction with the model and the equivalent multistate model analysis of wind-powered electricity generation while being incorporated to
Stochastic Production Simulation situation after electric system.Zhang Hongyu, Fang Xin, Li Bihui etc. are in " China Power " (2012,45 (06): 73-
767) " containing extensive wind-solar power supply electric system Stochastic Production Simulation " delivered on is according to itself of wind-powered electricity generation and photo-voltaic power supply electricity
Source characteristic and its correlation with power grid propose that wind-powered electricity generation and photo-voltaic power supply participate in the principle of Stochastic Production Simulation.According to being mentioned
Principle is corresponding to propose the expectation of wind power loss and 2 evaluation indexes of abandonment ratio.Feng Changyou, Liang Zhifeng are in " electric power network technique "
" the electric system Stochastic Production Simulation for considering trend profile constraints " delivered on (2013,37 (02): 493-499) combines power grid
Practical operation situation has divided trend section type and has constructed respective counts according to whether there is or not electricity transaction and section to constitute situation
Learn descriptive model.Based on this, give the processing method of different type section in equivalent energy function method, devise accordingly with
Machine production simulation calculation process.Yao Li, Huang Bin, Wang Xiuli etc. send out on " electric power network technique " (2015,39 (05): 1219-1225)
Using wind-powered electricity generation multistate model, it is surplus to introduce unit for " considering that wind fire combines the interacted system Stochastic Production Simulation sent outside " article of table
The concept of covolume amount proposes to combine and sends probabilistic model outside to simulate sending end power grid to the electric power of receiving end power grid and support process.Knot
All types of power supply features are closed, devises and considers that wind fire combines the interacted system Stochastic Production Simulation algorithm frame sent outside.With above
In offering, the influence of wind, photoelectricity fluctuation, intermittence, randomness to electric system production simulation is all investigated emphatically, without considering
The factor of peak regulation is participated in nuclear power unit, polymorphic type Hydropower Unit.In patent, the inventors such as Fan Hong, left great, Ma Lian application
Patent of invention " the Stochastic Production Simulation calculation method of energy efficiency power plant " be directed to energy efficiency power plant demand side management in terms of innovation with it is right
The accurate simulation of wind-powered electricity generation photoelectricity unit output, probe into energy efficiency power plant and large-sized photovoltaic wind power station power output to Operation of Electric Systems
It influences.A kind of patent of invention " electric system containing large-scale photovoltaic power station of the inventors such as Shi Tao, Han Hualing, Zhu Lingzhi application
Random production analog method " determine each rank cumulant of system unit equivalence available capacity for being free of photovoltaic plant；Successively acquisition pair
Answer the timing available capacity probability distribution Beta model and parameter of the photovoltaic power generation of period；Successively obtain the corresponding period contains photovoltaic
Reliability index under the system unit equivalence available capacity distribution probability model and parameter and corresponding load level in power station.Wu Hong
A kind of patent of invention " Stochastic Production Simulation side for wind-solar-storage joint electricity generation system of the inventors such as refined, Bai Xue, fourth be bright application
Method " it is divided using K-Means algorithm progress Meteorological Models by wind power generation module, photovoltaic generating module, energy storage device and load
Serializing, based on sequence operation theory carry out Stochastic Production Simulation, better describe wind light mutual complementing characteristic, and carry out scene
The Stochastic Production Simulation of storing cogeneration system provides reference with scheduling so as to the operation for wind-solar-storage joint electricity generation system.
The Stochastic Production Simulation of the above patent further contemplates the influence of hydroenergy storage station and load variations, but does not still examine
Consider nuclear power, polymorphic type Hydropower Unit participates in the influence of peak regulation.
Currently, while the fast development of non-fossil power supply, some areas abandonment, abandoning light, abandoning water problems are prominent, " three Norths "
Area's wind electricity digestion is difficult, and Yunnan, two province of Sichuan abandoning water are serious.Abandoning can not only cause a large amount of non-fossil energy waste, also to non-
Fossil energy sustainable development brings many strikes.National Development and Reform Committee's publication in 2017 " solves to abandon water abandonment abandoning optical issue implementation
Scheme ", it proposes effectively to solve to abandon water abandonment abandoning optical issue in China to the year two thousand twenty, wherein vital one is to want
Implement Renewable Portfolio Standard management.In March, 2018, " renewable energy power quota and the examination of National Energy Board's publication
Method (exposure draft) " (hereinafter referred to as " exposure draft "), the renewable energy of, the year two thousand twenty each province in 2018 is specified for the first time
Source total electricity quota index, non-water power renewable energy quota index and related evaluation method.As it can be seen that abandon can increasingly at
The firm constraints condition that must be taken into consideration for electric system.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of consideration abandonings to constrain
Sending end electric system random production analog method and application.
The purpose of the present invention can be achieved through the following technical solutions:
It is a kind of to consider to abandon the sending end electric system random production analog method that constrained, comprising the following steps:
1) annual load curve is obtained, nuclear power whole year power curve is rejected from the annual load curve, is continued
Load curve, and the lasting load curve is divided by base lotus, waist lotus, peak load three phases according to annual load level；
2) equivalent electric quantity function is established according to the lasting load curve；
3) according to effect electricity, realize that fired power generating unit and Hydropower Unit are controlled in the power output of different phase；
4) consider the quotation of clean energy resource and its abandon and can constrain, the power output shape of dynamic regulation clean energy resource and fired power generating unit
State obtains electric system Stochastic Production Simulation data.
Further, the acquisition modes of the nuclear power whole year power curve are as follows:
Consider that nuclear power participates in peak regulation, the typical day that design nuclear power is greater than the set value in peak-valley difference is with " 12-3-6-3 " peak regulation mould
Formula power output, remaining period with rated power tape base lotus, obtain nuclear power whole year power output timing curve.
Further, the establishment process of the equivalent electric quantity function includes:
301) on lasting load curve, horizontal axis x is segmented by Δ x, the lasting load curve is converted to discrete
Initial quantity of electricity function:
In formula, k=< x/ Δ x >+1, < x/ Δ x > indicate that the integer for being not more than x/ Δ x, E (k) are equal to from x to x+ Δ x
The corresponding power load of this section of load curve, F (x) indicate lasting load curve；
302) consider the influence that generating set is stopped transport at random, be modified based on initial quantity of electricity function, obtained final
Equivalent electric quantity function:
E(i)(k)=piE(i-1)(k)+qiE(i-1)(k-mi)
In formula, E(i)It (k) is i-th postrun equivalent electric quantity function of generating set of operation, qiFor forced outage rate, pi=
1-qi, mi=Ci/ Δ x, CiFor the installed capacity of i-th generating set.
Further, it is described realize fired power generating unit and Hydropower Unit in the power output of different phase specifically includes the following steps:
301) it is sorted according to economy to fired power generating unit, preferentially runs all fired power generating units by minimum load section tape base lotus；
302) according to regulating power to Hydropower Unit sort, successively run day tune type Hydropower Unit, season tune type Hydropower Unit,
Year tune type Hydropower Unit, wind-powered electricity generation, photoelectricity purchase capacity band residue load according to protection；
303) judge whether load is assigned, if so, thening follow the steps 4), if it is not, thening follow the steps 304)；
304) day tune type Hydropower Unit, season tune type Hydropower Unit, year tune type Hydropower Unit, wind-powered electricity generation, photoelectricity is successively run to press
Capacity band residue load is purchased according to economy, executes step 4).
Further, the Hydropower Unit meets the following conditions in production simulation:
In formula, PHLFor the maximum load power that Hydropower Unit is served as, CHFor Hydropower Unit capacity, ELFor power load, EAFor
Hydropower Unit gives electricity.
Further, the position of Hydropower Unit on-load described in separate unit determines in the following manner:
The characteristic rectangle of a Hydropower Unit is constructed under the lasting load curve, the width of this feature rectangle is water power
Unit capacity, which is highly Hydropower Unit, utilizes hourage, the horizontal axis of characteristic rectangle bottom and characteristic rectangle in simulation cycle
It is overlapped, moves this feature rectangle under lasting load curve, when the area of this feature rectangle is equal to lasting load curve in phase
When answering the area in section, using the respective bins as the position of this Hydropower Unit on-load.
Further, the step 4) specifically includes:
401) quotation of each clean energy resource is obtained, the capacity of abandoning of each clean energy resource of dynamic select participates in peak load regulation network, and
Reject the unit for being unsatisfactory for section capacity-constrained, reactive capability constraint etc.；
402) judge whether clean energy resource abandoning energy is greater than abandoning and can constrain, if so, terminating, if it is not, thening follow the steps
403)；
403) fired power generating unit is mediated, clean energy resource power output is increased, abandons and can constrain until meeting.
Further, this method further comprises the steps of:
5) generated energy, production cost and reliability index are calculated according to electric system Stochastic Production Simulation data.
Further, the reliability index includes that system charge deficiency desired value, loss of load probability and electric power are insufficient
Desired value；
The production cost includes fuel cost, fired power generating unit starting expense and idleness expense.
The present invention also provides a kind of Power System Planning and operation methods, this method comprises:
Consider that abandoning the sending end electric system random production analog method that can be constrained obtains stochastic production mould using as mentioned
Quasi- data.
Compared with prior art, the present invention have with following the utility model has the advantages that
One, the present invention considers the influence that nuclear power participates in peak regulation in Stochastic Production Simulation, can stabilize load curve
Fluctuation reduces peak-valley difference, further increases the peak modulation capacity of regional power grid.
Two, the present invention is in Stochastic Production Simulation according to all types of water of different reasonable arrangements of the regulating power of Hydropower Unit
Motor group participates in peak regulation, is divided into year tune type Hydropower Unit, season tune type Hydropower Unit, day tune type Hydropower Unit and considers water power participation
The influence of peak regulation can sufficiently dissolve water power, improve the economy of power plant year generation schedule.
Three, on the clean energy resource protection purchase volumetric basis for meeting administration request, it is contemplated that solar energy, wind-powered electricity generation etc. are clear
The power generation capacity of abandoning of the clean energy participates in electric system peak regulation as normal power supplies, realizes all kinds of hairs such as water power, solar energy, wind-powered electricity generation
Electric energy competition online.
Four, in the insufficient situation of clean energy resource peak modulation capacity, consider to increase fired power generating unit power output, participate in peak-load regulating,
To which safeguards system entirety energy consumption is minimum, ensure that clean energy resource preferentially generates electricity, safeguards system is minimum to the pollution of environment.
Five, the present invention finally participates in peak-load regulating with thermoelectricity, under the premise of safeguards system safe and stable operation, realizes system
Energy consumption of uniting is minimum, and environment is most friendly.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is lasting load curve schematic diagram；
Fig. 3 is single Hydropower Unit band peak load situation schematic diagram；
Fig. 4 is the determination schematic diagram of single Hydropower Unit on-load position；
Fig. 5 is the total cost of production schematic diagram of H power grid；
Fig. 6 is the LOLP index schematic diagram of H power grid；
Fig. 7 is the EENS index schematic diagram of H power grid；
Fig. 8 is the nuclear power operating cost schematic diagram of H power grid；
Fig. 9 is the thermoelectricity operating cost schematic diagram of H power grid；
Figure 10 is the water power operating cost schematic diagram of H power grid.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
The present invention provides a kind of sending end electric system random production analog method that considers abandoning and can constrain, and is based on continuous loading
Base lotus, waist lotus and the peak load of curve further consider that the purchase of clean energy resource protection is held on the basis of traditional Stochastic Production Simulation
The capacity portions of abandoning of amount consumption in full, the clean energy resourcies such as water power, wind-powered electricity generation, solar power generation participate in peak regulation.
In above-mentioned random production analog method, the operating condition of nuclear power, fired power generating unit and Hydropower Unit is designed,
Concrete principle is as follows.
In nuclear power station actual motion, presurized water reactor generally uses control rod and boron concentration to realize as control amount to reaction
The control of heap Steam Generator in Load Follow.Wherein control rod controls quick changes of reactivity, such as generator terminal load variations；Boron concentration controls at a slow speed
Reactions change, be mainly used for compensate burnup, the changes of reactivity of reactor core poisonous substance.Nuclear power unit adjustable region run when,
Power regulation rate is typically about ± 0.2%Pn/ min- ± 0.3%Pn/ min, highest is no more than ± 5%PnThe limit of/min,
And changed power range is able to carry out in ± 10%PnWithin Spline smoothing, but unit not can be carried out continuous power step and become
Change and linear change, it is contemplated that the depth and rate limitation of peak regulation, the day that " 12-3-6-3 " can be used in compacted clay liners are negative
Lotus tracing mode completes drop power, in 3h that is, with rated power operation 12h with 30%Pn- 70%PnRun 6h (presurized water reactor core
The Steam Generator in Load Follow threshold value of motor group is 30%Pn- 100%Pn.There are 70%PnNargin), then in 3h complete power per liter continue
With 12h rated power operation.Furthermore, it is contemplated that nuclear power unit carries out frequent power regulation, reactor pressure vessel can be aggravated
Radiation embrittlement, coolant circulating system and steam supply system certain key metallic components metal fatigue, may be decreased
The service life of unit equipment, the daily load tracing mode that nuclear power unit does not answer whole year to be all made of " 12-3-6-3 " participate in peak regulation.
Fired power generating unit is arranged according to its economy.
Hydropower Unit is by peak modulation capacity by being divided into weak by force: year tune type Hydropower Unit, season tune type Hydropower Unit, day tune
Type Hydropower Unit.Compared with fired power generating unit, Hydropower Unit is had the following characteristics that
1) Hydropower Unit does not consume fuel, and power generation expense is almost unrelated with generated energy；
2) generated energy and generated output of Hydropower Unit are determined by hydrologic condition, it is sent out in Stochastic Production Simulation
Electricity should be seen as the generating set that specified rate Hydropower Unit belongs to given electricity, its generated energy conduct when carrying out production simulation
Specified criteria.
3) Hydropower Unit start-stop is flexible, and increasing and decreasing load is rapid, is cut out for the peak load part of load curve.
In order to give full play to the benefit of Hydropower Unit, following two principle should be followed when arranging water power operation:
1) hydraulic power potentials is made full use of, avoids abandoning water as far as possible.
2) using Hydropower Unit come band peak load part, the fired power generating unit that coal consumption amount can be replaced big in this way, so as to take
Preferable economic benefit and environmental benefit are obtained, therefore just should undertake peak with water power as far as possible when there is Hydropower Unit in system
Lotus, to reach the effect for reducing coal consumption.
Above-mentioned random production analog method includes data input and pretreatment, Stochastic Production Simulation calculating, reliability index
With three parts of system production cost calculation, specific steps are described as follows:
Step S101, obtain annual load curve, annual wind-powered electricity generation, photovoltaic power generation output forecasting curve, fired power generating unit coal consumption coefficient,
All types of water single fighters give electricity, all types of Hydropower Unit base lotuses power output area, economic power output area and adjustable power output Qu Dengji
Plinth data.Nuclear power unit follow load curve is arranged, peak-valley difference biggish typical day, preferential to pacify in annual timing load curve
It arranges nuclear power and peak regulation is participated in above-mentioned " 12-3-6-3 " mode, remaining annual period nuclear power is with rated power tape base lotus.
This curve is subtracted from load curve, is obtained according to the nuclear power whole year of acquisition power output timing curve by step S102
Then net load curve forms lasting load curve such as Fig. 2 and is divided into lasting load curve then according to annual load level
Base lotus, waist lotus, three sections of peak load.
T=F (x) is the based model for load duration curve of system in T research cycle, and abscissa indicates system loading, ordinate table
Show the duration of load, PLmaxExpression system peak load, (x, t) indicate that system loading is greater than or equal to the duration of x
For t.
Step S103 chooses generating set capacity greatest common factor (G.C.F.) as step-length, forms initial equivalent electric quantity function.
Method particularly includes: on lasting load curve, horizontal axis x is segmented by Δ x, defines a discrete electric quantity function:
In formula: k=< x/ Δ x >+1；< x/ Δ x > indicates the integer for being not more than x/ Δ x；E (k) is equal to from x to x+ Δ x
The corresponding power load of this section of load curve.
In order to consider the outage factor of generating set, the shadow stopped transport at random with generating set is needed in equivalent electric quantity function
It rings to correct electric quantity function.If original lasting load curve is F(0)(x), corresponding electric quantity function is E(0)(k), is being arranged
Equivalent load duration curve F is obtained after the operation of i-1 platform generating set(i-1)(x), corresponding equivalent electric quantity function is E(i-1)
(k).If the installed capacity of i-th generating set is Ci, forced outage rate qi, then arrange i-th generating set postrun etc.
Imitate electric quantity function are as follows:
E(i)(k)=piE(i-1)(k)+qiE(i-1)(k-mi)
In formula: pi=1-qi；mi=Ci/Δx。
Step S104 arranges fired power generating unit according to economy, and all fired power generating units of giving priority in arranging for are by minimum load
Section tape base lotus.
Step S105, in the most weak Hydropower Unit power output of the preferential peak modulation capacity of base lotus section, that is, day tune type water power of giving priority in arranging for
Unit tape base lotus.
Due to Hydropower Unit carry out production simulation when its generated energy as specified criteria, calculation method and fired power generating unit
It is different.The case where separate unit Hydropower Unit serves as peak load is as shown in Figure 3.Curve cg is suitable from former load curve to left in figure
In Hydropower Unit capacity CH?.The area of dash area should be equal to the specified rate E of Hydropower UnitA.Remaining machine in this case
The load that group should be served as is oacgfh portion enclosed.Away from a point CHThe b point of (Hydropower Unit capacity) makees vertical line be, then schemes
The area of shape acg and the area equation of figure bde.That is the load that remaining unit is served as can regard as by Oafh and
Bde two parts composition.This is equivalent to the load that Hydropower Unit assumes responsibility for the part abef in figure.
Therefore the treatment principle in the production simulation of single Hydropower Unit is summed up are as follows:
It is found under equivalent load curve and is equivalent to Hydropower Unit capacity CHOne section, area is exactly equal to hydroelectric machine therebetween
The given electricity E of groupA.That is, Hydropower Unit should meet the following conditions in production simulation:
P in formulaHLFor the maximum load power that Hydropower Unit is served as, CHFor Hydropower Unit capacity, ELFor power load, EAFor
Hydropower Unit gives electricity.
Fig. 4 indicates the process that Hydropower Unit running position is determined in production simulation.Make under equivalent load curve first
Characteristic rectangle abb ' a ', bottom C of Hydropower Unit outH, utilization hourage T of a height of Hydropower Unit in simulation cycleH.When
This rectangle is moved right, when area of the load curve in respective bins being made to be equal to the rectangular area, has found hydroelectric machine
Group running position.
The characteristic rectangle of above-mentioned Hydropower Unit actually sequentially arranges the mistake of Hydropower Unit operation to the process for moving to left function
Journey, one Hydropower Unit characteristic rectangle of every arrangement will move right one section of distance corresponding with the fired power generating unit capacity.Due to this
Kind movement is discontinuous.It is difficult to ensure that above-mentioned condition is set up just.Therefore algorithmically, by Hydropower Unit capacity CHAnd water power
The given electricity E of unitAUpper boundary conditions when as arrangement Hydropower Unit are calculated.For the feelings of more Hydropower Units
Condition, if there is N in systemHPlatform Hydropower Unit.Their characteristic rectangle is from left to right arranged by its height (utilizing hourage) size
Column form Hydropower Unit characteristic rectangle sequence chart.It is moved from left to right when sequence chart, in a certain of equivalent load duration curve
When section meets the following conditions:
Preceding n Hydropower Unit can merge into an equivalent Hydropower Unit, and the load with corresponding position.Remaining NH-n
The rectangle sequence chart of platform Hydropower Unit should continue to move right, and merge into another equivalent hydroelectric machine in the section of boundary condition
Group, the load with the section.
Step S106 judges whether there is remaining load, if so, successively arranging day tune type, Ji Tiaoxing, year tune type hydroelectric machine
Group, wind-powered electricity generation, photoelectricity, fired power generating unit are according to economy band residue load, specifically, all fired power generating unit band waist lotuses of giving priority in arranging for
And peak load, other units are then successively arranged, then execute step S107, if it is not, then directly executing S107.
Step S107 participates in peak load regulation network according to quotation dynamic select clean energy resource residual capacity and fired power generating unit, realizes
Spot exchange rejects the unit for being unsatisfactory for section capacity-constrained, reactive capability constraint etc., it is ensured that after peak capacity is sufficient, stop
All kinds of forms of electricity generation compete upper network process.
Step S108 calculates clean energy resource and abandons energy, can constrain if more than abandoning, then arrange fired power generating unit according to economy tune
Stop, increase clean energy resource power output, abandons and can constrain until meeting.
Step S109, zoning power grid production cost and reliability index.It acquires polymorphic type generating set and participates in peak regulation
In the case of, the reliability indexs such as all types of unit annual electricity generating capacities, production cost, expected loss of energy, loss of load probability,
It analyzes polymorphic type generating set and participates in influence of the peak regulation to Stochastic Production Simulation result.
(1) generated energy and reliability index
The generated energy E of i-th generating setGiIt should be according to equivalent electric quantity function E(i-1)(k) it is calculated:
In formula: ki-1=xi-1/Δx；ki=(xi-1+Ci)/Δx.Assuming that sharing n platform generating set in system, total capacity is
Cs, after whole generating set convolution algorithms terminate, equivalent electric quantity function E(n)(k)。
1) system charge deficiency desired value EENS:
2) loss of load probability LOLP:
3) expected loss of load EDNS (Expected Demand Not Supplied):
The insufficient desired value of systematic electricity in expression studied a period of time:
EDNS=EENS/T
In above formula: EENS indicates that expected loss of energy, T indicate research cycle.
(2) production cost is analyzed
The total production cost of system includes fuel cost, fired power generating unit starting expense, idleness expense.Starting expense includes machine
Unit abrasion and service life caused by fuel cost, labour cost and frequent start-stop that group starts are lost.Steam turbine starts expense
It further include the operation and maintenance cost of unit starting.Under different entry conditions, starting expense is slightly different, but can be approximate
Regard fixed as.In a certain period of time, it as the machine stop times of unit with the number of starts of unit are, therefore, shuts down
Expense be typically also it is fixed, can be integrated into the starting expense of unit, it may be assumed that
Ctotal=Cfuel+Ctsu+Csd
In formula: CfuelFor fuel cost；CtsuStart expense for the steam turbine of fired power generating unit；CsdFor idleness expense.
In formula: cfuel,iFor the fuel cost of i-th unit unit generated energy；ctsu,iFor i-th unit unit generated energy
Steam turbine starts expense；csd,iFor the idleness expense of i-th unit unit generated energy；Fi sFor the expectation booting time of i-th unit
Number；EGiFor the generated energy of i-th generating set, T is research cycle, piThe value of forced outage rate is subtracted equal to 1.
Embodiment
The present embodiment will consider that polymorphic type power supply participates in the electric system random production analog method of peak regulation using Mr. Yu's water
The practical H regional power grid in non-leap year China, calculate nuclear power unit, all types of Hydropower Units participate in peak regulation when reliability index and
Production cost index.Year H regional power grid total installation of generating capacity 372598MW, wherein coal unit installed capacity 227751MW,
Accounting 61.3%, Hydropower Unit installed capacity 8062MW, accounting 2.16%；Nuclear power installed capacity 35724MW, accounting 9.5%, most
High load capacity 284800MW.Part calculates data and is provided that coal price is taken as 560 yuan/t, and gas price is 4000 yuan/t, coal unit ring
Border cost is 101.246 yuan/MWh, and Gas Generator Set Environmental costs are 19.285 yuan/MWh；Water power be averaged operating cost be 60 yuan/
MWh, day tune type, Ji Tiaoxing, the base carrying capacity of year tune type water single fighter, waist carrying capacity, the setting of peak load electricity is such as table 1；Nuclear power machine
Group, on the basis of CPR1000 nuclear power unit, average operating cost is 222.4 yuan/MWh, nuclear power when day peak-valley ratio is higher than 20%
Unit participates in peak regulation, and peak regulation depth is 60%.One group of comparison example is set simultaneously, nuclear power whole year with rated power tape base lotus,
Do not consider each Hydropower Unit peak modulation capacity difference of type simultaneously, calculates reliability index and production cost index.
Base lotus, the waist lotus, peak load section electricity of all types of water single fighters of table 1
Table 2 considers that polymorphic type unit participates in certain forcasted years H regional power grid Stochastic Production Simulation result of peak regulation
The reliability index of H power grid and every cost are as shown in fig. 5-10.
The external Utilities Electric Co.'s generating reliability standard of table 3
Note: 3 data of table come from Tsinghua University's science monograph: " Power System Reliability Analysis ", and Guo Yongji writes.
In terms of reliability, contrast table 3 and table 2 do not consider core as can be seen that using expected loss of load EDNS as index
When electric and all types of Hydropower Unit peaking performance differences, the EDNS of H power grid is 1.06, belongs to higher level, considers polymorphic type machine
EDNS after group peak regulation is 0.22, and reliability level is significantly improved.It on the one hand is due to system installed capacity abundance；It is another
Aspect, nuclear power and all types of Hydropower Units effectively mitigate peak-load regulating pressure after participating in peak regulation, load curve fluctuation are stabilized, into one
Step improves the reliability level of system.
In terms of economy, according to table 2 as can be seen that after considering that polymorphic type power supply participates in peak regulation, system total cost of production drop
Low, economy is significantly improved.Wherein thermoelectricity operating cost reduces by 81.5 hundred million yuan, and nuclear power operating cost lowers 32.5 hundred million yuan,
2.3 hundred million yuan of water power increased costs.It is that nuclear power undertakes with Hydropower Unit because peak load is given priority in arranging for that thermoelectricity cost, which is greatly reduced, base lotus
It is undertaken with waist lotus fired power generating unit of giving priority in arranging for, reduces the peak load that fired power generating unit is undertaken with higher economic cost；Nuclear power cost drop
Low is to reduce annual full power fortune because nuclear power participates in peak regulation by " 12-3-6-3 " mode in peak-valley ratio biggish typical day
Row duration, causes operating cost to reduce；Water power increased costs are because of after having arranged fired power generating unit with traditional Stochastic Production Simulation
It arranges Hydropower Unit to compare with the method for peak load again, after fully considering that all types of Hydropower Unit regulating powers are different, arranges to adjust
The preferential tape base lotus of the unit of ability difference, waist lotus, the strong unit of regulating power preferentially with peak load, can preferentially dissolve more water power,
Enhance system water power digestion capability, thus water power cost increase.In general, since water power cost is far below nuclear power, thermoelectricity
Operating cost, system total cost of production are greatly reduced, remarkable in economical benefits.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of consider to abandon the sending end electric system random production analog method that can be constrained, which comprises the following steps:
1) annual load curve is obtained, nuclear power whole year power curve is rejected from the annual load curve, obtains continuous loading
Curve, and the lasting load curve is divided by base lotus, waist lotus, peak load three phases according to annual load level；
2) equivalent electric quantity function is established according to the lasting load curve；
3) according to equivalent electric quantity, realize that fired power generating unit and Hydropower Unit are controlled in the power output of different phase；
4) consider the quotation of clean energy resource and its abandon and can constrain, the power output state of dynamic regulation clean energy resource and fired power generating unit obtains
Obtain electric system Stochastic Production Simulation data.
2. according to claim 1 consider to abandon the sending end electric system random production analog method that can be constrained, feature exists
In the acquisition modes of the nuclear power whole year power curve are as follows:
Consider that nuclear power participates in peak regulation, design nuclear power is gone out in the typical day that peak-valley difference is greater than the set value with " 12-3-6-3 " peak regulation mode
Power, remaining period with rated power tape base lotus, obtain nuclear power whole year power output timing curve.
3. according to claim 1 consider to abandon the sending end electric system random production analog method that can be constrained, feature exists
In the establishment process of the equivalent electric quantity function includes:
301) on lasting load curve, horizontal axis x is segmented by Δ x, the lasting load curve is converted to discrete initial
Electric quantity function:
In formula, k=< x/ Δ x >+1, < x/ Δ x > indicate be not more than x/ Δ x integer, E (k) be equal to from x to x+ Δ x this
The corresponding power load of section load curve, F (x) indicate lasting load curve；
302) consider the influence stopped transport at random of generating set, be modified based on initial quantity of electricity function, obtained final etc.
Imitate electric quantity function:
E(i)(k)=piE(i-1)(k)+qiE(i-1)(k-mi)
In formula, E(i)It (k) is i-th postrun equivalent electric quantity function of generating set of operation, qiFor forced outage rate, pi=1-
qi, mi=Ci/ Δ x, CiFor the installed capacity of i-th generating set.
4. according to claim 1 consider to abandon the sending end electric system random production analog method that can be constrained, feature exists
In, it is described realize fired power generating unit and Hydropower Unit in the power output of different phase specifically includes the following steps:
301) it is sorted according to economy to fired power generating unit, preferentially runs all fired power generating units by minimum load section tape base lotus；
302) it is sorted according to regulating power to Hydropower Unit, successively runs day tune type Hydropower Unit, season tune type Hydropower Unit, year tune
Type Hydropower Unit, wind-powered electricity generation, photoelectricity purchase capacity band residue load according to protection；
303) judge whether load is assigned, if so, thening follow the steps 4), if it is not, thening follow the steps 304)；
304) day tune type Hydropower Unit, season tune type Hydropower Unit, year tune type Hydropower Unit, wind-powered electricity generation, photoelectricity are successively run according to warp
Ji property purchase capacity band residue load, executes step 4).
5. according to claim 1 consider to abandon the sending end electric system random production analog method that can be constrained, feature exists
In the Hydropower Unit meets the following conditions in production simulation:
In formula, PHLFor the maximum load power that Hydropower Unit is served as, CHFor Hydropower Unit capacity, ELFor power load, EAFor water power
Unit gives electricity.
6. according to claim 4 consider to abandon the sending end electric system random production analog method that can be constrained, feature exists
In the position of Hydropower Unit on-load described in separate unit determines in the following manner:
The characteristic rectangle of a Hydropower Unit is constructed under the lasting load curve, the width of this feature rectangle is Hydropower Unit
Capacity, which is highly Hydropower Unit, utilizes hourage in simulation cycle, and characteristic rectangle bottom is overlapped with the horizontal axis of characteristic rectangle,
Move this feature rectangle under lasting load curve, when the area of this feature rectangle is equal to lasting load curve in respective bins
When interior area, using the respective bins as the position of this Hydropower Unit on-load.
7. according to claim 1 consider to abandon the sending end electric system random production analog method that can be constrained, feature exists
In the step 4) specifically includes:
401) quotation of each clean energy resource is obtained, the capacity of abandoning of each clean energy resource of dynamic select participates in peak load regulation network, and rejects
It is unsatisfactory for the unit of section capacity-constrained, reactive capability constraint etc.；
402) judge whether clean energy resource abandoning energy is greater than abandoning and can constrain, if so, terminating, if it is not, thening follow the steps 403)；
403) fired power generating unit is mediated, clean energy resource power output is increased, abandons and can constrain until meeting.
8. according to claim 1 consider to abandon the sending end electric system random production analog method that can be constrained, feature exists
In this method further comprises the steps of:
5) generated energy, production cost and reliability index are calculated according to electric system Stochastic Production Simulation data.
9. according to claim 8 consider to abandon the sending end electric system random production analog method that can be constrained, feature exists
In the reliability index includes system charge deficiency desired value, loss of load probability and expected loss of load；
The production cost includes fuel cost, fired power generating unit starting expense and idleness expense.
10. a kind of Power System Planning and operation method, which is characterized in that this method comprises:
It is obtained using the sending end electric system random production analog method as described in claim 1 for considering that abandoning can constrain random raw
Produce analogue data.
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