CN109818356A - A kind of load scheduling method and device - Google Patents
A kind of load scheduling method and device Download PDFInfo
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- CN109818356A CN109818356A CN201910290183.8A CN201910290183A CN109818356A CN 109818356 A CN109818356 A CN 109818356A CN 201910290183 A CN201910290183 A CN 201910290183A CN 109818356 A CN109818356 A CN 109818356A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The embodiment of the present application discloses a kind of load scheduling method, comprising: obtains daily load prediction curve；According to the prediction load at moment each in daily load prediction curve, total prediction load is calculated；It is equal to total prediction load with the summation of the generated output power at each moment for the first constraint condition；It is equal to the summation of the load restoration amount at each moment with the summation of the load reduction at each moment for the second constraint condition；The corresponding single moment, according to the prediction load at single moment, using power flow equation as third constraint condition；The 4th constraint condition is limited to generated output power；The 5th constraint condition is limited to busbar voltage；It is optimized using the totle drilling cost function for combining load to cut down cost and cost of electricity-generating as objective function, obtains optimum results；According to optimum results, while dispatching generator and load translation；Solves the existing electricity market method of operation, there are no a kind of dispatching methods of consideration load translation, do not provide the user with the chance for carrying out load translation.
Description
Technical field
This application involves electricity market technical field more particularly to a kind of load scheduling method and devices.
Background technique
Sale of electricity company, user and power plant tripartite are generally included in electricity market, wherein sale of electricity company is as power plant
" bridge " between user, is sold to user after power plant power purchase.
Electricity price be it is closely bound up with the electricity consumption period, in peak times of power consumption, electricity price is usually higher, and in the low power consumption phase,
Electricity price is then relatively much lower.Why electricity price is related to the consumption habit of user, is because needing in the peak period of more people's electricity consumptions
The output power of biggish generator, and the corresponding cost of electricity-generating of biggish generated output power be also it is biggish, power generation at
In this increase reflection to electricity price, electricity price rises will be made.
As it can be seen that if the load sharing of peak times of power consumption to other times section (load translation) can be effectively reduced
Electric cost.But the existing electricity market method of operation, there are no a kind of dispatching methods of consideration load translation, do not give user
The chance for carrying out load translation is provided.
Summary of the invention
The embodiment of the present application provides a kind of load scheduling method and device, solves existing electricity market operation side
Formula, there are no a kind of dispatching methods of consideration load translation, do not provide the user with the chance for carrying out load translation.
In view of this, the application first aspect provides a kind of load scheduling method, comprising:
Obtain daily load prediction curve；
According to the prediction load at each moment in the daily load prediction curve, total prediction load is calculated；
It is equal to total prediction load with the summation of the generated output power at each moment for the first constraint condition；With each
The summation that the summation of the load reduction at a moment is equal to the load restoration amount at each moment is the second constraint condition；
The corresponding single moment, according to the prediction load at the single moment, using power flow equation as third constraint condition；With hair
Output power of motor is limited to the 4th constraint condition；The 5th constraint condition is limited to busbar voltage；
It is optimized using the totle drilling cost function for combining load to cut down cost and cost of electricity-generating as objective function, obtains optimization knot
Fruit, the optimum results include the preferred output power of generator, preferably load reduction and the preferred load restoration at each moment
Amount；
According to the optimum results, while dispatching generator and load translation.
Preferably, the corresponding load of the load reduction at each moment cuts down the first summation of cost, the hair at each moment
Second summation of the corresponding cost of electricity-generating of output power of motor, the totle drilling cost function are in conjunction with first summation and described the
Two summations are established to obtain.
Preferably, it is true according to the first corresponding relationship that the corresponding load of the load reduction at each moment, which cuts down cost,
It is fixed；
First corresponding relationship is the corresponding relationship that preset different load reduction and load cut down cost；
In first corresponding relationship, the load reduction and the load are cut down cost and are positively correlated.
Preferably, in first corresponding relationship, the load reduction and the load cut down cost structure segmentation
Linear function；
In the piecewise linear function, it is fragmented into the last one segmentation from first, corresponding slope is segmented and is gradually increased.
Preferably, the corresponding cost of electricity-generating of generated output power at each moment is true according to the second corresponding relationship
It is fixed；
Second corresponding relationship be according to the bidding data of generator preset, different generated output powers with
The corresponding relationship of cost of electricity-generating；
In second corresponding relationship, the generated output power and the cost of electricity-generating are positively correlated.
Preferably, in second corresponding relationship, the generated output power constitutes secondary with the cost of electricity-generating
Function.
It preferably, further include the 6th constraint condition；
6th constraint condition includes the limitation to the load reduction at single moment and the load to the single moment
The limitation of amount of recovery.
Preferably, further includes:
Using the preferred output power of generator at each moment in the optimum results, it is bent to form daily planning output power
Line, and the daily planning output power curve is sent to display screen and is shown.
Preferably, described to be optimized using the totle drilling cost function for combining load to cut down cost and cost of electricity-generating as objective function
It specifically includes:
To combine load to cut down the totle drilling cost function of cost and cost of electricity-generating as objective function and according to default optimization algorithm
It optimizes.
The application second aspect provides a kind of load scheduling device, comprising:
Acquiring unit, for obtaining daily load prediction curve；
It is negative to calculate total prediction for the prediction load according to each moment in the daily load prediction curve for computing unit
Lotus；
Constraint condition establishes unit, negative for being equal to total prediction with the summation of the generated output power at each moment
Lotus is the first constraint condition；It is with the summation that the summation of the load reduction at each moment is equal to the load restoration amount at each moment
Second constraint condition；The corresponding single moment constrains item by third of power flow equation according to the prediction load at the single moment
Part；The 4th constraint condition is limited to generated output power；The 5th constraint condition is limited to busbar voltage；
Optimize unit, for excellent as objective function progress using the totle drilling cost function for combining load to cut down cost and cost of electricity-generating
Change, obtain optimum results, the optimum results include each moment the preferred output power of generator, preferably load reduction with
It is preferred that load restoration amount；
Scheduling unit is used for according to the optimum results, while dispatching generator and load translation.
As can be seen from the above technical solutions, the embodiment of the present application has the advantage that
In the embodiment of the present application, a kind of load scheduling method is provided, comprising: obtain daily load prediction curve；According to day
The prediction load at each moment in load prediction curve calculates total prediction load；With the generated output power at each moment
It is the first constraint condition that summation, which is equal to total prediction load,；It is equal to the negative of each moment with the summation of the load reduction at each moment
The summation of lotus amount of recovery is the second constraint condition；The corresponding single moment is with power flow equation according to the prediction load at single moment
Third constraint condition；The 4th constraint condition is limited to generated output power；The 5th constraint condition is limited to busbar voltage；
It is optimized using the totle drilling cost function for combining load to cut down cost and cost of electricity-generating as objective function, obtains optimum results, optimized
As a result the preferred output power of generator including each moment, preferably load reduction and preferred load restoration amount；According to optimization
As a result, dispatching generator and load translation simultaneously.
As it can be seen that load scheduling method provided by the embodiments of the present application, cuts down cost and cost of electricity-generating to be able to reflect load
Totle drilling cost function be objective function, and combine in constraint condition load translation bring load and cut down and load restoration,
Optimization can make the preferred output power of generator, preferably load reduction and the preferred load at each moment of the lowest cost
Amount of recovery, has found load translation bring benefit and load is cut down between (a part of load translation) caused cost itself
Equalization point, provide very big directive significance for the determination of load scheduling scheme, system operator allow to dispatch hair simultaneously
Motor and load translation, realize system realtime power balance for greater flexibility.
Detailed description of the invention
Fig. 1 is the flow chart under the first implementation of load scheduling method provided by the embodiments of the present application；
Fig. 2 is the song that a kind of reflection load reduction and load provided by the embodiments of the present application cut down corresponding relationship between cost
Line chart；
Fig. 3 is the flow chart under second of implementation of load scheduling method provided by the embodiments of the present application；
Fig. 4 is the system loading curve graph in application examples provided by the embodiments of the present application；
Fig. 5 is that the load of example two shown in Fig. 4 translates histogram；
Fig. 6 is the electricity price change curve in application examples provided by the embodiments of the present application；
Fig. 7 is that system always saves the curve graph that cost changes with Beta in application examples provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only this
Apply for a part of the embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall in the protection scope of this application.
The embodiment of the present application provides a kind of load scheduling method, it considers load translation influence factor, make be
System operator can dispatch generator and load translation simultaneously, realize system realtime power balance for greater flexibility.
Below referring to Figure 1, Fig. 1 is under the first implementation of load scheduling method provided by the embodiments of the present application
Flow chart, this method comprises:
Step 101 obtains daily load prediction curve.
Daily load prediction curve is the prediction to the load at second day each moment, specifically, can pass through the electricity consumption of history
Data prediction obtains, can also predict to obtain according to the power demand of user feedback.
Step 102, according to the prediction load at moment each in daily load prediction curve, calculate total prediction load.
It needs with how many load, just generate how many electricity, and in this implementation, the load of intervention, which translates, can't break this
Gentle, i.e. the total electricity consumption (generated energy total in other words) in optimization front and back should be constant.For this purpose, can be with the power generation at each moment
It is the first constraint condition that the summation of machine output power, which is equal to total prediction load, referring to step 103.
Step 103 is equal to total prediction load with the summation of the generated output power at each moment for the first constraint condition；
It is equal to the summation of the load restoration amount at each moment with the summation of the load reduction at each moment for the second constraint condition；It is corresponding
The single moment, according to the prediction load at single moment, using power flow equation as third constraint condition；It is limited with generated output power
For the 4th constraint condition；The 5th constraint condition is limited to busbar voltage.
In this implementation, set five constraint conditions so that final optimum results will not sideslip, close as far as possible
Reason is expected with close.
It should be noted that the first constraint condition and the second constraint condition are the constraint condition for all moment, change
Yan Zhi is directed to the constraint condition of whole day.
Wherein, the generated energy of the first constraint condition reflection optimization front and back should be constant, specifically may refer to saying for step 102
Bright, details are not described herein.
Second constraint condition reacts the balance of load translation, i.e. the summation of load reduction should be equal to load restoration amount
Summation.Certainly, the generation moment at load is cut down generation moment and load restoration can be different.Typically, load is cut
Generation at the time of in electricity price higher peak times of power consumption should be selected by subtracting, and load restoration should then select the lower electricity consumption of electricity price low
Occur at the time of in the paddy phase.
Second constraint condition specifically can be represented by the formula:
Wherein,Indicate bus i t moment load reduction,Indicate bus i t moment load restoration amount,
B is system busbar set.
And the constraint condition of third, the 4th and the 5th is inscribed when being directed to one, it is specific such as third constraint condition
It is specific as follows for power flow equation constraint:
In formula (2)-(3),For bus i t moment generated output power,For bus i t moment prediction
Load, Vi,tFor voltage magnitude, θi,tFor voltage phase angle, GijAnd BijThe respectively conductance and susceptance of transmission line of electricity,For power generation
Output that machine is idle,For bus load or burden without work.
4th constraint condition is the limitation to generated output power, specific as follows:
In formula (4)-(5), Pi G,minAnd Pi G,maxRespectively generated power exports bound,WithRespectively
Generator reactive exports bound.
5th constraint condition is the limitation to busbar voltage, specific as follows:
In formula (6), Vi minAnd Vi maxThe respectively bound of bus voltage amplitude.
Step 104 is optimized using the totle drilling cost function for combining load to cut down cost and cost of electricity-generating as objective function, is obtained
To optimum results.
Totle drilling cost function can specifically include two parts, and a part is that load cuts down cost, and a part is cost of electricity-generating.It is negative
Lotus can cause certain cost when cutting down, and cost of electricity-generating is then the cost of generating set power generation.
Be readily appreciated that, it is the totle drilling cost at whole day all moment that totle drilling cost function is corresponding comprising load cut down cost
That the corresponding load of load reduction at each moment cuts down the summation (being properly termed as the first summation) of cost comprising power generation
Cost is the summation (the second summation) of the corresponding cost of electricity-generating of generated output power at each moment.
Cost is cut down for load, it should be noted that load reduction is bigger, and corresponding load is cut down cost and then got over
Height, i.e., the two should be positively related relationship.It, can be but preferred there are many form when both specific reflections corresponding relationship
Form is indicated with piecewise linear function.
In piecewise linear function, it is fragmented into the last one segmentation from first, being segmented corresponding slope should gradually increase
Greatly.This is because in the market, with the increase of load reduction, it is possible to provide the user of corresponding load reduction (such as it is large-scale
Industry or commercial user) ratio is reduced therewith, so that the value that large capacity load is cut down in the market is higher.
It may refer to Fig. 2, Fig. 2 shows a kind of reflection load reductions provided by the embodiments of the present application and load to cut down cost
Between corresponding relationship curve graph.The piecewise linear function can be indicated with mathematic(al) representation:
In formula (7)-(10), B is system busbar set, and T is period set, and L is to bear in load translation bidding curve
The set of lotus reduction section.Indicate bus i in the load reduction of t moment.Sl,iIndicate that bus i cuts down slope in l sections of loads.
σl,i,tIndicate that l sections of loads are cut down in bus i, the load reduction of t moment.CD() indicates the Bidding Price Functions of load translation.
For cost of electricity-generating, it is in the corresponding relationship of expression generated output power and cost of electricity-generating, it can be according to hair
The bidding data of motor carries out analysis and obtains.It is understood that generated output power is also positively related with cost of electricity-generating
Relationship, i.e. generated output power are bigger, and cost of electricity-generating is higher.
This implementation provides a kind of conventional form of expression, can be indicated using quadratic function, specific as follows:
In formula (11), CG() indicates generated output power and the quadratic function that cost of electricity-generating is constituted, ai、biAnd ciTable
Show the coefficient of the generator cost function positioned at bus i.
Therefore, the totle drilling cost function that cost and cost of electricity-generating are cut down in conjunction with load, can be indicated with following formula:
It can be optimized with above formula (12) for objective function, optimum results include that the generator at each moment preferably exports
Power, preferably load reduction and preferred load restoration amount.
It should be noted that the preferred output power of the generator at each moment in optimum results, it is believed that be negative to day
The some portion of load adjustment of A period has been arrived the B period by the adjustment of power load distributing in lotus prediction curve, but total load is
Constant.And it is preferred that load reduction with preferred load restoration amount is showing for more specific load translation schemes.
Step 105, according to optimum results, while dispatching generator and load and translating.
In this implementation, a kind of load scheduling method is provided, comprising: obtain daily load prediction curve；It is negative according to day
The prediction load at each moment in lotus prediction curve calculates total prediction load；With the total of the generated output power at each moment
It is the first constraint condition with total prediction load is equal to；It is equal to the load at each moment with the summation of the load reduction at each moment
The summation of amount of recovery is the second constraint condition；The corresponding single moment is the with power flow equation according to the prediction load at single moment
Three constraint conditions；The 4th constraint condition is limited to generated output power；The 5th constraint condition is limited to busbar voltage；With
It is optimized in conjunction with the totle drilling cost function that load cuts down cost and cost of electricity-generating for objective function, obtains optimum results, optimization knot
Fruit includes the preferred output power of generator, preferably load reduction and the preferred load restoration amount at each moment；It is tied according to optimization
Fruit, while dispatching generator and load translation.
As it can be seen that the load scheduling method under this implementation, the total of cost and cost of electricity-generating is cut down to be able to reflect load
Cost function is objective function, and load translation bring load reduction and load restoration, optimization are combined in constraint condition
It can make the preferred output power of generator, preferably load reduction and the preferred load restoration at each moment of the lowest cost out
Amount has found flat between cost caused by load translation bring benefit and load reduction (a part of load translation) itself
Weigh point, provides very big directive significance for the determination of load scheduling scheme, system operator is allow to dispatch generator simultaneously
And load translation, system realtime power balance is realized for greater flexibility.
It is the detailed description under the first implementation to load scheduling method provided by the embodiments of the present application above, under
Requesting in person referring to Fig. 3, Fig. 3 is the flow chart under second of implementation of load scheduling method provided by the embodiments of the present application, should
Method includes:
Step 201 obtains daily load prediction curve.
The step may refer to the step 101 in the first above-mentioned implementation.
Step 202, according to the prediction load at moment each in daily load prediction curve, calculate total prediction load.
The step may refer to the step 102 in the first above-mentioned implementation.
Step 203 is equal to total prediction load with the summation of the generated output power at each moment for the first constraint condition；
It is equal to the summation of the load restoration amount at each moment with the summation of the load reduction at each moment for the second constraint condition；It is corresponding
The single moment, according to the prediction load at single moment, using power flow equation as third constraint condition；It is limited with generated output power
For the 4th constraint condition；The 5th constraint condition is limited to busbar voltage；With the limitation of load reduction and load restoration amount
It is limited to the 6th constraint condition.
This implementation increases the 6th constraint condition.6th constraint condition is also the constraint condition for the single moment,
It is the limitation to the load reduction at single moment and the limitation of the load restoration amount to the single moment, formula specific as follows:
In formula (13)-(14), βCAnd βRRespectively load reduction and load restoration amount the Zhan maximum percentage of always predicting load
Than.
The setting of 6th constraint condition can be avoided effectively excessive load reduction occur at the single moment and be restored, thus
Finally make the process of entire load translation more gentle, avoids causing new impact to system.
Step 204 cuts down the totle drilling cost function of cost and cost of electricity-generating using combination load as objective function and according to default
Optimization algorithm optimizes.
After constraint condition and objective function determine, it can be optimized by default optimization algorithm.Default optimization is calculated
There are many selections of method, can choose various evolution algorithms, such as genetic algorithm, ant colony algorithm, finds optimal solution.
Step 205, according to optimum results, while dispatching generator and load and translating.
Step 206, the preferred output power of generator using the moment each in optimum results form daily planning output power
Curve, and daily planning output power curve is sent to display screen and is shown.
In order to facilitate checking for system operator, the preferred output power of the generator at obtained each moment can be with curve
Form present, form daily planning output power curve, and daily planning output power curve be sent to display screen and is shown.
In this implementation, a kind of load scheduling method is provided, comprising: obtain daily load prediction curve；It is negative according to day
The prediction load at each moment in lotus prediction curve calculates total prediction load；With the total of the generated output power at each moment
It is the first constraint condition with total prediction load is equal to；It is equal to the load at each moment with the summation of the load reduction at each moment
The summation of amount of recovery is the second constraint condition；The corresponding single moment is the with power flow equation according to the prediction load at single moment
Three constraint conditions；The 4th constraint condition is limited to generated output power；The 5th constraint condition is limited to busbar voltage；With
It is optimized in conjunction with the totle drilling cost function that load cuts down cost and cost of electricity-generating for objective function, obtains optimum results, optimization knot
Fruit includes the preferred output power of generator, preferably load reduction and the preferred load restoration amount at each moment；It is tied according to optimization
Fruit, while dispatching generator and load translation.
As it can be seen that the load scheduling method under this implementation, the total of cost and cost of electricity-generating is cut down to be able to reflect load
Cost function is objective function, and load translation bring load reduction and load restoration, optimization are combined in constraint condition
It can make the preferred output power of generator, preferably load reduction and the preferred load restoration at each moment of the lowest cost out
Amount has found flat between cost caused by load translation bring benefit and load reduction (a part of load translation) itself
Weigh point, provides very big directive significance for the determination of load scheduling scheme, system operator is allow to dispatch generator simultaneously
And load translation, system realtime power balance is realized for greater flexibility.
The Simulation Application example that a embodiment of the present application is carried out using above-mentioned load scheduling method is provided below.By model
Using the electric system in IEEE-30 node, to be bonded practical power systems operating condition, which includes 6 generator sections
Point and 21 load bus.System total power generating capacity is 650 megawatts, and peak load is 470 megawatts.
The influence after load translation for systematic economy type and operation is added for research, the application example proposes following two
Example:
Example one: in this example, each node of system does not consider that load translates.All users are the insensitive use of price
Family.
Example two: in this example, the load of all 21 nodes both participates in load translation.User can submit load flat
Shifting is bidded.
Fig. 4 illustrates the system loading curve in example one and example two.From fig. 4, it can be seen that being after joined load translation
(11:00 to 14:00) is effectively reduced peak load of uniting.And the load being cut in peak period is then moved to system loading
Low ebb load period (1:00 to 7:00).To finally obtain load curve more gentle in example two.
Fig. 5 illustrates the load translation motion in example two by taking the 30th node (load bus) as an example in detail.Thus result
As it can be seen that the process that load is cut down is distributed within the scope of longer time.This is because the load translation energy balance in formula (1) is
For entire planning time range (24 hours), so that permissible load is cut down and load restoration can be in entire scheduling
Between occur in range, and on this basis, formula (13) and (14) then effectively limit excessive load of single period cut down with
Restore.
Fig. 6 illustrates the variation of the 30th node of system electricity price per hour.In example one, system goes out in the peak load period
Show electricity price peak, and in example two, due to the addition of load translation, so that the electricity price peak is effectively suppressed.Thus
It can be seen that the reduction of peak period load has direct effect for the inhibition of system electricity price spike.
Table one
System operation cost
Table one illustrates the economic sex expression of system.Comparison example one, two can be seen that, although example two is translated due to load
Addition, increase load and translate this cost, but due to the reduction of cost of electricity-generating, make system synthesis sheet with respect to example instead
One reduces.It can be seen that the introducing of load translation can effectively help to reduce system operation cost.
Fig. 7 illustrates system and always saves the curve that cost changes with Beta.From curve as can be seen that as load translates
The raising of the ratio of shared system loading, system escapable cost increase therewith.However, when the ratio reaches 25% or more,
For the saving of system cost close to saturation, load translation is no longer obvious to the adjustment effect of system economy.And it can be with from figure
Find out, it is the most obvious to the reduction effect of system cost when the permeability of load translation is within the scope of 5%-10%.
On the other hand, the embodiment of the present application also provides a kind of load scheduling devices, comprising:
Acquiring unit, for obtaining daily load prediction curve；
Computing unit calculates total prediction load for the prediction load according to the moment each in daily load prediction curve；
Constraint condition establishes unit, is for being equal to total prediction load with the summation of the generated output power at each moment
First constraint condition；It is equal to the summation of the load restoration amount at each moment with the summation of the load reduction at each moment for second
Constraint condition；The corresponding single moment, according to the prediction load at single moment, using power flow equation as third constraint condition；With power generation
Machine output power limit is the 4th constraint condition；The 5th constraint condition is limited to busbar voltage；
Optimize unit, for excellent as objective function progress using the totle drilling cost function for combining load to cut down cost and cost of electricity-generating
Change, obtain optimum results, optimum results include the preferred output power of generator at each moment, preferred load reduction and preferably
Load restoration amount；
Scheduling unit is used for according to optimum results, while dispatching generator and load translation.
The embodiment of the present application provides a kind of load scheduling device, cuts down cost and cost of electricity-generating to be able to reflect load
Totle drilling cost function is objective function, and load translation bring load reduction and load restoration are combined in constraint condition, excellent
Dissolving can make the preferred output power of generator, preferably load reduction and the preferred load at each moment of the lowest cost extensive
Complexor, has found load translation bring benefit and load is cut down between (a part of load translation) caused cost itself
Equalization point provides very big directive significance for the determination of load scheduling scheme, system operator is allow to dispatch power generation simultaneously
Machine and load translation, realize system realtime power balance for greater flexibility.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description
It with the specific work process of unit, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
The description of the present application and term " first " in above-mentioned attached drawing, " second ", " third ", " the 4th " etc. are (if deposited
) it is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that use in this way
Data are interchangeable under appropriate circumstances, so that embodiments herein described herein for example can be in addition to illustrating herein
Or the sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limit
In step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produce
The other step or units of product or equipment inherently.
It should be appreciated that in this application, " at least one (item) " refers to one or more, and " multiple " refer to two or two
More than a."and/or" indicates may exist three kinds of relationships, for example, " A and/or B " for describing the incidence relation of affiliated partner
It can indicate: only exist A, only exist B and exist simultaneously tri- kinds of situations of A and B, wherein A, B can be odd number or plural number.Word
Symbol "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or"." at least one of following (a) " or its similar expression, refers to
Any combination in these, any combination including individual event (a) or complex item (a).At least one of for example, in a, b or c
(a) can indicate: a, b, c, " a and b ", " a and c ", " b and c ", or " a and b and c ", and wherein a, b, c can be individually, can also
To be multiple.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored or not executed.Another point, it is shown or discussed
Mutual coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or logical of device or unit
Letter connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the application
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (full name in English: Read-Only
Memory, english abbreviation: ROM), random access memory (full name in English: Random Access Memory, english abbreviation:
RAM), the various media that can store program code such as magnetic or disk.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before
Embodiment is stated the application is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of load scheduling method characterized by comprising
Obtain daily load prediction curve；
According to the prediction load at each moment in the daily load prediction curve, total prediction load is calculated；
It is equal to total prediction load with the summation of the generated output power at each moment for the first constraint condition；With it is each when
The summation that the summation of the load reduction at quarter is equal to the load restoration amount at each moment is the second constraint condition；
The corresponding single moment, according to the prediction load at the single moment, using power flow equation as third constraint condition；With generator
Output power limit is the 4th constraint condition；The 5th constraint condition is limited to busbar voltage；
It is optimized using the totle drilling cost function for combining load to cut down cost and cost of electricity-generating as objective function, obtains optimum results,
The optimum results include the preferred output power of generator, preferably load reduction and the preferred load restoration amount at each moment；
According to the optimum results, while dispatching generator and load translation.
2. load scheduling method according to claim 1, which is characterized in that the load reduction at each moment is corresponding negative
Lotus cuts down the first summation of cost, and the second summation of the corresponding cost of electricity-generating of the generated output power at each moment is described total
Cost function is to establish to obtain in conjunction with first summation and second summation.
3. load scheduling method according to claim 2, which is characterized in that the load reduction at each moment is corresponding
Load cut down cost be according to the first corresponding relationship determine；
First corresponding relationship is the corresponding relationship that preset different load reduction and load cut down cost；
In first corresponding relationship, the load reduction and the load are cut down cost and are positively correlated.
4. load scheduling method according to claim 3, which is characterized in that described negative in first corresponding relationship
Lotus reduction and the load cut down cost structure piecewise linear function；
In the piecewise linear function, it is fragmented into the last one segmentation from first, corresponding slope is segmented and is gradually increased.
5. load scheduling method according to claim 1, which is characterized in that the generated output power at each moment
Corresponding cost of electricity-generating is to be determined according to the second corresponding relationship；
Second corresponding relationship preset, different generated output powers and power generation for the bidding data according to generator
The corresponding relationship of cost；
In second corresponding relationship, the generated output power and the cost of electricity-generating are positively correlated.
6. load scheduling method according to claim 5, which is characterized in that in second corresponding relationship, the hair
Output power of motor and the cost of electricity-generating constitute quadratic function.
7. load scheduling method according to claim 1, which is characterized in that further include the 6th constraint condition；
6th constraint condition includes the limitation to the load reduction at single moment and the load restoration to the single moment
The limitation of amount.
8. load scheduling method according to claim 1, which is characterized in that further include:
Using the preferred output power of generator at each moment in the optimum results, daily planning output power curve is formed, and
The daily planning output power curve is sent to display screen to show.
9. load scheduling method according to claim 1, which is characterized in that described to combine load to cut down cost and power generation
The totle drilling cost function of cost is optimized for objective function and is specifically included:
To combine load to cut down the totle drilling cost function of cost and cost of electricity-generating as objective function and according to the progress of default optimization algorithm
Optimization.
10. a kind of load scheduling device characterized by comprising
Acquiring unit, for obtaining daily load prediction curve；
Computing unit calculates total prediction load for the prediction load according to each moment in the daily load prediction curve；
Constraint condition establishes unit, is for being equal to total prediction load with the summation of the generated output power at each moment
First constraint condition；It is equal to the summation of the load restoration amount at each moment with the summation of the load reduction at each moment for second
Constraint condition；The corresponding single moment, according to the prediction load at the single moment, using power flow equation as third constraint condition；With
Generated output power is limited to the 4th constraint condition；The 5th constraint condition is limited to busbar voltage；
Optimize unit, for being optimized using the totle drilling cost function for combining load to cut down cost and cost of electricity-generating as objective function,
Obtain optimum results, the optimum results include each moment the preferred output power of generator, preferably load reduction with it is excellent
Select load restoration amount；
Scheduling unit is used for according to the optimum results, while dispatching generator and load translation.
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| US20160258361A1 (en) * | 2015-03-03 | 2016-09-08 | General Electric Company | Methods and systems for enhancing control of power plant generating units |
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| US20160258361A1 (en) * | 2015-03-03 | 2016-09-08 | General Electric Company | Methods and systems for enhancing control of power plant generating units |
| CN107196310A (en) * | 2016-03-15 | 2017-09-22 | 中国电力科学研究院 | The active distribution network Multiple Time Scales optimization method of consideration source net lotus coordination and interaction |
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Application publication date: 20190528 |