CN105303244A - Distribution network power supply method and apparatus for active power distribution network - Google Patents
Distribution network power supply method and apparatus for active power distribution network Download PDFInfo
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Abstract
The invention discloses a distribution network power supply method and apparatus for an active power distribution network. The distribution network power supply method for the active power distribution network comprises: obtaining power supply fee information of each power supply in multiple power supplies of the active power distribution network, wherein the multiple power supplies include various power supplies; determining power supply types in time periods according to the power supply fee information in sequence; determining the power of the power supply corresponding to the power supply type in each time period according to a predicted power supply load; and controlling the active power distribution network to supply power according to the determined power. Through the distribution network power supply method and apparatus, the problem that a planning scheme does not meet a practical operational condition due to the fact that distribution network power supply cannot be reasonably performed is solved, so that the effect of supplying power according to the practical condition of the multiple power supplies in the active power distribution network is achieved.
Description
Technical field
The present invention relates to power supply field, in particular to a kind of supplying power allocation method and apparatus of active distribution network.
Background technology
Along with the shortage of fossil energy and environmental issue are day by day serious, and the sustainable growth of electricity needs and electricity market opening day by day, this will require that power supply grid can adapt to following technical need, have efficient, flexibly, the feature of intelligence and sustainable development.In the form access distribution that regenerative resource, clean fossil energy generate electricity in a distributed manner, i.e. distributed power source (DistributedGeneration is called for short DG).The voltage levvl of distribution, capacity of short circuit are had a great impact.Add the complexity of relay protection setting, affect power supply reliability and the quality of power supply.Although the development of micro-capacitance sensor and virtual plant technology provides solution to the integrated of distributed power source, the distribution problems such as still to also exist that rack is strong not, scheduling mode is backward and the interactive level of electricity consumption is low, regenerative resource is dissolved not enough.Active distribution network technology can solve the extensive batch (-type) regenerative resource of power grid application, improves green energy resource utilization factor, optimizes the problems such as primary energy structure.Active distribution network possesses the distribution network that combination controls the abilities such as various DG, controllable burden, energy storage, dsm.Its objective is and strengthen the receiving ability of power distribution network for regenerative resource, promote the utilization factor of power distribution network assets, delay the upgrading investment of power distribution network, and improve power quality and the power supply reliability of user.
The form that regenerative resource, clean fossil energy generate electricity in a distributed manner, more and more in active distribution.User participates in dsm, and user side power resources, as the schedulable part of operation of power networks, participates in Operation of Electric Systems.Therefore taking into full account the operation characteristic of polynary power supply in various distribution when planning, making the more realistic ruuning situation of programme, significant.
Two large classes are had both at home and abroad: (1) distribution rack and power supply coordinated planning about the DG planning technology scheme relevant to active distribution network; (2) the single planning of DG.
Existing distribution planning technology, normally utilize the information on load that prediction is following, control various power supply by a given hourage generating according to this information on load, reasonably can not carry out supplying power allocation and cause programme and practical operation situation to disconnect, cause overinvestment, economy is bad.
For the problem reasonably can not carried out supplying power allocation in prior art and cause programme and practical operation situation to disconnect, at present effective solution is not yet proposed.
Summary of the invention
Fundamental purpose of the present invention is the supplying power allocation method and apparatus providing a kind of active distribution network, reasonably must not carry out with solution the problem that supplying power allocation causes programme and practical operation situation to disconnect.
To achieve these goals, according to an aspect of the present invention, a kind of supplying power allocation method of active distribution network is provided.Supplying power allocation method according to active distribution network of the present invention comprises: the power supply cost information obtaining each power supply in the polynary power supply of active distribution network, and wherein, described polynary power supply comprises multiple power supply; The power supply type in each period is determined successively according to described power supply cost information; The output power that power supply corresponding to power supply type in described each period is born is determined according to the supply load of prediction; And control described active distribution network according to the output power determined and power.
Further, described polynary power supply comprises Demand-side power supply, distributed power source and major network power supply, wherein, comprises according to the power supply type that described power supply cost information is determined in each period successively: the coordinate system setting up power-on time and power supply expense; Described Demand-side power supply, described distributed power source and the parameter changes curve of described major network power supply in described coordinate system is determined successively according to described power supply cost information; And determine the power supply type in described each period based on described parameter changes curve.
Further, when determining the power supply period of described distributed power source, determine that the output power that power supply corresponding to power supply type in described each period is born comprises according to the supply load of prediction: the output power calculating described distributed power source each node power within the described power supply period, after the output power that the power supply that the power supply type determined in described each period according to the supply load predicted is corresponding is born, described supplying power allocation method also comprises: the injecting power calculating described distributed power source each node within the described power supply period.
Further, after the injecting power calculating described distributed power source each node within the described power supply period, described supplying power allocation method also comprises: the planning circuit calculating described distributed power source according to described injecting power and distribution expense, and described distribution expense is the expense of described distributed power source being carried out to distribution; And the grid structure of described distributed power source is set up based on described planning circuit, wherein, under described grid structure, control described active distribution network according to the output power determined and power.
Further, described distributed power source comprise following one of at least: internal combustion engine, gas turbine, micro fuel engine, fuel cell, Wind turbines, photoelectricity unit.
To achieve these goals, according to a further aspect in the invention, a kind of supplying power allocation device of active distribution network is provided.Supplying power allocation device according to active distribution network of the present invention comprises: acquiring unit, for obtain active distribution network polynary power supply in the power supply cost information of each power supply, wherein, described polynary power supply comprises multiple power supply; First determining unit, for determining the power supply type in each period successively according to described power supply cost information; Second determining unit, for determining the output power that power supply corresponding to power supply type in described each period is born according to the supply load of prediction; And control module, power for controlling described active distribution network according to the output power determined.
Further, described polynary power supply comprises Demand-side power supply, distributed power source and major network power supply, and wherein, described first determining unit comprises: set up module, for setting up the coordinate system of power-on time and power supply expense; First determination module, for determining described Demand-side power supply, described distributed power source and the parameter changes curve of described major network power supply in described coordinate system successively according to described power supply cost information; And
Second determination module, for determining the power supply type in described each period based on described parameter changes curve.
Further, described second determination module comprises: computing module, for when determining the power supply period of described distributed power source, calculate the output power of described distributed power source each node power within the described power supply period, described supplying power allocation device also comprises: the first computing unit, for after the output power that the power supply that the power supply type determined in described each period at the supply load according to prediction is corresponding is born, calculate the injecting power of described distributed power source each node within the described power supply period.
Further, described supplying power allocation device also comprises: the second computing unit, for after the injecting power calculating described distributed power source each node within the described power supply period, calculate the planning circuit of described distributed power source according to described injecting power and distribution expense, described distribution expense is the expense of described distributed power source being carried out to distribution; And set up unit, for setting up the grid structure of described distributed power source based on described planning circuit, wherein, under described grid structure, control described active distribution network according to the output power determined and power.
Further, described distributed power source comprise following one of at least: internal combustion engine, gas turbine, micro fuel engine, fuel cell, Wind turbines, photoelectricity unit.
According to the embodiment of the present invention, obtain the power supply cost information of each power supply in the polynary power supply of active distribution network, the power supply type in each period is determined successively according to power supply cost information, the output power that power supply corresponding to power supply type in each period is born is determined according to the supply load of prediction, control active distribution network according to the output power determined to power, thus solve the problem reasonably can not carried out supplying power allocation and cause programme and practical operation situation to disconnect, reach and carry out the effect of powering according to the actual conditions of power supply polynary in active distribution network.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram of the supplying power allocation method of active distribution network according to the embodiment of the present invention;
Fig. 2 (a) is the schematic diagram of the cost curve of polynary power supply according to the embodiment of the present invention;
Fig. 2 (b) is the schematic diagram of the prediction yearly load curve according to the embodiment of the present invention; And
Fig. 3 is the schematic diagram of the supplying power allocation device of active distribution network according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that embodiments of the invention described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiments provide a kind of supplying power allocation method of active distribution network.
Fig. 1 is the process flow diagram of the supplying power allocation method of active distribution network according to the embodiment of the present invention.As shown in Figure 1, to comprise step as follows for the supplying power allocation method of this active distribution network:
Step S102, obtain the power supply cost information of each power supply in the polynary power supply of active distribution network, wherein, polynary power supply comprises multiple power supply.
Polynary power supply comprises multiple power supply, such as, Demand-side power supply, various distributed power source (as internal combustion engine, gas turbine, micro fuel engine, fuel cell etc.) and major network power supply, power supply cost information can be fixed cost and the variable cost information of Demand-side power supply, various DG (internal combustion engine, gas turbine, micro fuel engine, fuel cell) and major network power supply.Power supply cost information can be the cost information of polynary power supply in each period, because the expense of power supply of the same race in polynary power supply at Different periods can change, different types of power supply also may not be identical in the expense of identical period, obtains this power supply cost information so that according to the low power supply of power supply cost information sorting charge.
Step S104, determines the power supply type in each period successively according to power supply cost information.
After getting power supply cost information, can determine the power supply type of network minimal in each period successively according to power supply cost information, the power supply that then regulate expenditure is minimum is powered.
Step S106, determines according to the supply load of prediction the output power that power supply corresponding to power supply type in each period is born.
In electric power supply, all need the supply load predicting this year every year, so that power according to the supply load of prediction.Determining that active distribution network is after the power supply type of each period, the output power of each period power supply can distributed based on the supply load of prediction.
Step S108, controls active distribution network according to the output power determined and powers.
After determining the output power that power supply corresponding to the power supply type in each period is born, active distribution network can be controlled according to the output power determined and power.
According to the embodiment of the present invention, obtain the power supply cost information of each power supply in the polynary power supply of active distribution network, the power supply type in each period is determined successively according to power supply cost information, the output power that power supply corresponding to power supply type in each period is born is determined according to the supply load of prediction, control active distribution network according to the output power determined to power, thus solve the problem reasonably can not carried out supplying power allocation and cause programme and practical operation situation to disconnect, reach and carry out the effect of powering according to the actual conditions of power supply polynary in active distribution network.
Preferably, polynary power supply comprises Demand-side power supply, distributed power source and major network power supply, wherein, determines that the power supply type in each period comprises successively according to power supply cost information: the coordinate system setting up power-on time and power supply expense; Demand-side power supply, distributed power source and major network power supply parameter changes curve is in a coordinate system determined successively according to power supply cost information; And the power supply type determining in each period based on parameter changes curve.
Particularly, polynary power supply cost curve is generated according to raw data (comprising the data such as the fixed cost of Demand-side power supply, various DG (internal combustion engine, gas turbine, micro fuel engine, fuel cell) and major network power supply, variable cost and serviceable life).Fig. 2 (a) is the cost curve of many power supplys, and horizontal ordinate is the time, and ordinate is unit capacity total expenses, i.e. average size expense.Curve 1,2,3 is expressed three class power supplys respectively and is changed unit capacity total expenses in time, and expression formula is as follows:
C
1＝C
1F+C
1V*t(1)
C
2＝C
2F+C
2V*t(2)
C
3＝C
3F+C
3V*t(3)
Wherein C
1, C
2, C
3the total unit capacity expenses of three class power supplys respectively; C
1F, C
2F, C
3Fthe unit capacity fixed expense of three class power supplys respectively; C
1V, C
2V, C
3Vthree class power supply unit capacity variable expenses respectively; T is the time, and unit is hour.
Prediction yearly load curve data are drawn, as shown in Fig. 2 (b) according to the supply load that namely yearly peak load data are predicted.
Initiatively the object of planning of electrical network is on the basis meeting reliability, selects the polynary power source planning scheme that gross investment is minimum.Because power supply 1 fixed expense is little, but operating cost is high, is applicable to bearing peak load.When the time is at 0 ~ t
1time, the unit capacity expense of Demand-side power supply is minimum.P
max-P
cit is the capacity that Demand-side power supply should be installed.Now on yearly load curve by P
max, P
c, C 3 areas surrounded, be exactly the electricity that Demand-side power supply is born; As a same reason, at t
2~ t
3period, the average cost of DGi is minimum, and DGi should be selected to bear load, and the installed capacity of DGi is P
c-P
b; The capacity that DGj installs is P
b-P
a.And P
aby distribution existing line and major network power source supplies power.
Preferably, when determining the power supply period of distributed power source, determine that the output power that power supply corresponding to power supply type in each period is born comprises according to the supply load of prediction: the output power of Computation distribution formula power supply each node power within the power supply period, after the output power that the power supply that the power supply type determined in each period according to the supply load predicted is corresponding is born, supplying power allocation method also comprises: the injecting power of Computation distribution formula power supply each node within the power supply period.
Particularly, in active distribution network space truss project, can determine in the following manner for the circuit of distributed power source and output power:
Tentatively determine DG configuration capacity on each node.Suppose that network to be planned connects entirely, the parameter of every bar circuit is given, the calculating based on this carries out below:
Objective function:
Wherein, Gi represents i-th node in distributed power source, P
girepresent the power at Gi point, p
dGirepresent the installed capacity of DGi.
Constraint condition:
minΔP
Σ(P
Gi)(5)
Structure Lagrangian function:
Separate this function, obtain equal network loss ratio criterion:
Install position and the capacity of distributed power source by this criterion, the active power loss of the whole network is minimum.Distributed power source is arranged on load bus, and distributed electrical source power deducts node load power, is exactly the injecting power of this node.Ask the calculating of distribution space truss project, node injecting power is exactly use this calculated value.
Preferably, after the injecting power of Computation distribution formula power supply each node within the power supply period, supplying power allocation method also comprises: according to the planning circuit of injecting power and distribution expense Computation distribution formula power supply, distribution expense is the expense of distributed power source being carried out to distribution; And the grid structure of distributed power source is set up based on planning circuit, wherein, under grid structure, control active distribution network according to the output power determined and power.
Particularly, the planning circuit of distributed power source can be drawn by following formulae discovery:
Objective function:
Wherein, C
dIS-distribution total expenses; NL-branch road sum; x
i-be 0,1 variable, 0 represents that i-th branch road is not selected, and 1 expression is chosen; C
liarticle-the i-th, branch road fixed investment expense; The unit price of power (unit/kWh) that β-major network is powered; Δ P
i-be the active loss of i-th branch road; W
i-be i-th line maintenance maintenance cost.
Wherein, constraint condition comprises:
1) node voltage constraint: U
imin≤ U
i≤ U
imax(9)
2) effective power flow constraint:
3) circuit capacity constraint: S
l≤ S
lmax(12)
4) network connectivty and radiation constrain.
Variable declaration in above-mentioned formula is as follows:
U
ithe magnitude of voltage of-i point; U
iminthe lower voltage limit of-i point; U
imaxthe upper voltage limit of-i point; p
dGjthe installed capacity of-DGj; K
dGj-decision variable, DGj is selected is 1, otherwise is 0; P
dG ∑-DG total volume is the result of first step planning; P
maxthe load maximal value in-planning region; P
loadthe capacity of-dsm is the result of the first step; S
lthe real power of-circuit L; S
lmaxthe rated capacity of-circuit L.
The network structure that application planning goes out, then use formula (7) to calculate DG at the capacity of each node installation, then carry out layout of roads.This is an iterative process, until the distribution total expenses of twice iteration is less than certain precision, then terminates to calculate.
Preferably, distributed power source comprise following one of at least: internal combustion engine, gas turbine, micro fuel engine, fuel cell, Wind turbines, photoelectricity unit.
The embodiment of the present invention additionally provides a kind of supplying power allocation device of active distribution network.This device can realize its function by computer equipment.It should be noted that, the supplying power allocation device of the active distribution network of the embodiment of the present invention may be used for the supplying power allocation method performing the active distribution network that the embodiment of the present invention provides, and the supplying power allocation device of the active distribution network that the supplying power allocation method of the active distribution network of the embodiment of the present invention also can be provided by the embodiment of the present invention performs.
Fig. 3 is the schematic diagram of the supplying power allocation device of active distribution network according to the embodiment of the present invention.As shown in Figure 3, the supplying power allocation device of this active distribution network comprises: acquiring unit 10, first determining unit 20, second determining unit 30 and control module 40.
Acquiring unit 10 for obtain active distribution network polynary power supply in the power supply cost information of each power supply, wherein, polynary power supply comprises multiple power supply.
Polynary power supply comprises multiple power supply, such as, Demand-side power supply, various distributed power source (as internal combustion engine, gas turbine, micro fuel engine, fuel cell etc.) and major network power supply, power supply cost information can be fixed cost and the variable cost information of Demand-side power supply, various DG (internal combustion engine, gas turbine, micro fuel engine, fuel cell) and major network power supply.Power supply cost information can be the cost information of polynary power supply in each period, because the expense of power supply of the same race in polynary power supply at Different periods can change, different types of power supply also may not be identical in the expense of identical period, obtains this power supply cost information so that according to the low power supply of power supply cost information sorting charge.
First determining unit 20 is for determining the power supply type in each period successively according to power supply cost information.
After getting power supply cost information, can determine the power supply type of network minimal in each period successively according to power supply cost information, the power supply that then regulate expenditure is minimum is powered.
Second determining unit 30 is for determining the output power that power supply corresponding to power supply type in each period is born according to the supply load of prediction.
In electric power supply, all need the supply load predicting this year every year, so that power according to the supply load of prediction.Determining that active distribution network is after the power supply type of each period, the output power of each period power supply can distributed based on the supply load of prediction.
Control module 40 is powered for controlling active distribution network according to the output power determined.
After determining the output power that power supply corresponding to the power supply type in each period is born, active distribution network can be controlled according to the output power determined and power.
According to the embodiment of the present invention, obtain the power supply cost information of each power supply in the polynary power supply of active distribution network, the power supply type in each period is determined successively according to power supply cost information, the output power that power supply corresponding to power supply type in each period is born is determined according to the supply load of prediction, control active distribution network according to the output power determined to power, thus solve the problem reasonably can not carried out supplying power allocation and cause programme and practical operation situation to disconnect, reach and carry out the effect of powering according to the actual conditions of power supply polynary in active distribution network.
Preferably.Polynary power supply comprises Demand-side power supply, distributed power source and major network power supply, and wherein, the first determining unit comprises: set up module, for setting up the coordinate system of power-on time and power supply expense; First determination module, for determining Demand-side power supply, distributed power source and major network power supply parameter changes curve in a coordinate system successively according to power supply cost information; And second determination module, for determining the power supply type in each period based on parameter changes curve.
Particularly, polynary power supply cost curve is generated according to raw data (comprising the data such as the fixed cost of Demand-side power supply, various DG (internal combustion engine, gas turbine, micro fuel engine, fuel cell) and major network power supply, variable cost and serviceable life).Fig. 2 (a) is the cost curve of many power supplys, and horizontal ordinate is the time, and ordinate is unit capacity total expenses, i.e. average size expense.Curve 1,2,3 is expressed three class power supplys respectively and is changed unit capacity total expenses in time, and expression formula is as follows:
C
1＝C
1F+C
1V*t(1)
C
2＝C
2F+C
2V*t(2)
C
3＝C
3F+C
3V*t(3)
Wherein C
1, C
2, C
3the total unit capacity expenses of three class power supplys respectively; C
1F, C
2F, C
3Fthe unit capacity fixed expense of three class power supplys respectively; C
1V, C
2V, C
3Vthree class power supply unit capacity variable expenses respectively; T is the time, and unit is hour.
Prediction yearly load curve data are drawn, as shown in Fig. 2 (b) according to the supply load that namely yearly peak load data are predicted.
Initiatively the object of planning of electrical network is on the basis meeting reliability, selects the polynary power source planning scheme that gross investment is minimum.Because power supply 1 fixed expense is little, but operating cost is high, is applicable to bearing peak load.When the time is at 0 ~ t
1time, the unit capacity expense of Demand-side power supply is minimum.P
max-P
cit is the capacity that Demand-side power supply should be installed.Now on yearly load curve by P
max, P
c, C 3 areas surrounded, be exactly the electricity that Demand-side power supply is born; As a same reason, at t
2~ t
3period, the average cost of DGi is minimum, and DGi should be selected to bear load, and the installed capacity of DGi is P
c-P
b; The capacity that DGj installs is P
b-P
a.And P
aby distribution existing line and major network power source supplies power.
Preferably, second determination module comprises: computing module, for when determining the power supply period of distributed power source, the output power of Computation distribution formula power supply each node power within the power supply period, supplying power allocation device also comprises: the first computing unit, for after the output power that the power supply that the power supply type determined in each period at the supply load according to prediction is corresponding is born, the injecting power of Computation distribution formula power supply each node within the power supply period.
Particularly, in active distribution network space truss project, can determine in the following manner for the circuit of distributed power source and output power:
Tentatively determine DG configuration capacity on each node.Suppose that network to be planned connects entirely, the parameter of every bar circuit is given, the calculating based on this carries out below:
Objective function:
Wherein, Gi represents i-th node in distributed power source, P
girepresent the power at Gi point, p
dGirepresent the installed capacity of DGi.
Constraint condition:
minΔP
Σ(P
Gi)(5)
Structure Lagrangian function:
Separate this function, obtain equal network loss ratio criterion:
Install position and the capacity of distributed power source by this criterion, the active power loss of the whole network is minimum.Distributed power source is arranged on load bus, and distributed electrical source power deducts node load power, is exactly the injecting power of this node.Ask the calculating of distribution space truss project, node injecting power is exactly use this calculated value.
Preferably, supplying power allocation device also comprises: the second computing unit, for after the injecting power of Computation distribution formula power supply each node within the power supply period, according to the planning circuit of injecting power and distribution expense Computation distribution formula power supply, distribution expense is the expense of distributed power source being carried out to distribution; And set up unit, for setting up the grid structure of distributed power source based on planning circuit, wherein, under grid structure, control active distribution network according to the output power determined and power.
Particularly, the planning circuit of distributed power source can be drawn by following formulae discovery:
Objective function:
Wherein, C
dIS-distribution total expenses; NL-branch road sum; x
i-be 0,1 variable, 0 represents that i-th branch road is not selected, and 1 expression is chosen; C
liarticle-the i-th, branch road fixed investment expense; The unit price of power (unit/kWh) that β-major network is powered; Δ P
i-be the active loss of i-th branch road; W
i-be i-th line maintenance maintenance cost.
Wherein, constraint condition comprises:
1) node voltage constraint: U
imin≤ U
i≤ U
imax(9)
2) effective power flow constraint:
3) circuit capacity constraint: S
l≤ S
lmax(12)
4) network connectivty and radiation constrain.
Variable declaration in above-mentioned formula is as follows:
U
ithe magnitude of voltage of-i point; U
iminthe lower voltage limit of-i point; U
imaxthe upper voltage limit of-i point; p
dGjthe installed capacity of-DGj; K
dGj-decision variable, DGj is selected is 1, otherwise is 0; P
dG ∑-DG total volume is the result of first step planning; P
maxthe load maximal value in-planning region; P
loadthe capacity of-dsm is the result of the first step; S
lthe real power of-circuit L; S
lmaxthe rated capacity of-circuit L.
The network structure that application planning goes out, then use formula (7) to calculate DG at the capacity of each node installation, then carry out layout of roads.This is an iterative process, until the distribution total expenses of twice iteration is less than certain precision, then terminates to calculate.
Preferably, distributed power source comprise following one of at least: internal combustion engine, gas turbine, micro fuel engine, fuel cell, Wind turbines, photoelectricity unit.
To sum up, the embodiment of the present invention can reach following effect:
Due to existing distribution planning technology, following information on load is only expressed by a predicted value, and various power supply is by a given hourage generating, do not consider the position on load curve of various power supply, disconnect to making programme and practical operation situation, cause overinvestment, economy is bad.Year lasting load curve 8760 data of the information on load prediction of the embodiment of the present invention, major network is powered and dsm as particular power source, to come from different backgrounds and possess different abilities power supply with DG.According to polynary power supply expense characteristic, determine the position of all types of power supply on year lasting load curve, cook up power supply type and capacity thus.Carry out active distribution network space truss project and the planning of DG position on this basis.Programme economy of the present invention is better, and meets the practical operation situation of polynary power supply in active distribution network.
It should be noted that, for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed device, the mode by other realizes.Such as, device embodiment described above is only schematic, the such as division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, mobile terminal, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a supplying power allocation method for active distribution network, is characterized in that, comprising:
Obtain the power supply cost information of each power supply in the polynary power supply of active distribution network, wherein, described polynary power supply comprises multiple power supply;
The power supply type in each period is determined successively according to described power supply cost information;
The output power that power supply corresponding to power supply type in described each period is born is determined according to the supply load of prediction; And
Control described active distribution network according to the output power determined to power.
2. supplying power allocation method according to claim 1, is characterized in that, described polynary power supply comprises Demand-side power supply, distributed power source and major network power supply, wherein, comprises according to the power supply type that described power supply cost information is determined in each period successively:
Set up the coordinate system of power-on time and power supply expense;
Described Demand-side power supply, described distributed power source and the parameter changes curve of described major network power supply in described coordinate system is determined successively according to described power supply cost information; And
The power supply type in described each period is determined based on described parameter changes curve.
3. supplying power allocation method according to claim 2, is characterized in that, when determining the power supply period of described distributed power source,
Determine that the output power that power supply corresponding to power supply type in described each period is born comprises according to the supply load of prediction: the output power calculating described distributed power source each node power within the described power supply period,
After the output power that the power supply that the power supply type determined in described each period according to the supply load predicted is corresponding is born, described supplying power allocation method also comprises: the injecting power calculating described distributed power source each node within the described power supply period.
4. supplying power allocation method according to claim 3, is characterized in that, after the injecting power calculating described distributed power source each node within the described power supply period, described supplying power allocation method also comprises:
Calculate the planning circuit of described distributed power source according to described injecting power and distribution expense, described distribution expense is the expense of described distributed power source being carried out to distribution; And
Set up the grid structure of described distributed power source based on described planning circuit, wherein, under described grid structure, control described active distribution network according to the output power determined and power.
5. the supplying power allocation method according to any one of claim 2 to 4, is characterized in that, described distributed power source comprise following one of at least: internal combustion engine, gas turbine, micro fuel engine, fuel cell, Wind turbines, photoelectricity unit.
6. a supplying power allocation device for active distribution network, is characterized in that, comprising:
Acquiring unit, for obtain active distribution network polynary power supply in the power supply cost information of each power supply, wherein, described polynary power supply comprises multiple power supply;
First determining unit, for determining the power supply type in each period successively according to described power supply cost information;
Second determining unit, for determining the output power that power supply corresponding to power supply type in described each period is born according to the supply load of prediction; And
Control module, powers for controlling described active distribution network according to the output power determined.
7. supplying power allocation device according to claim 6, is characterized in that, described polynary power supply comprises Demand-side power supply, distributed power source and major network power supply, and wherein, described first determining unit comprises:
Set up module, for setting up the coordinate system of power-on time and power supply expense;
First determination module, for determining described Demand-side power supply, described distributed power source and the parameter changes curve of described major network power supply in described coordinate system successively according to described power supply cost information; And
Second determination module, for determining the power supply type in described each period based on described parameter changes curve.
8. supplying power allocation device according to claim 7, is characterized in that,
Described second determination module comprises: computing module, for when determining the power supply period of described distributed power source, calculates the output power of described distributed power source each node power within the described power supply period,
Described supplying power allocation device also comprises: the first computing unit, for after the output power that the power supply that the power supply type determined in described each period at the supply load according to prediction is corresponding is born, calculate the injecting power of described distributed power source each node within the described power supply period.
9. supplying power allocation device according to claim 8, is characterized in that, described supplying power allocation device also comprises:
Second computing unit, for after the injecting power calculating described distributed power source each node within the described power supply period, calculate the planning circuit of described distributed power source according to described injecting power and distribution expense, described distribution expense is the expense of described distributed power source being carried out to distribution; And
Set up unit, for setting up the grid structure of described distributed power source based on described planning circuit, wherein, under described grid structure, control described active distribution network according to the output power determined and power.
10. the supplying power allocation device according to any one of claim 7 to 9, is characterized in that, described distributed power source comprise following one of at least: internal combustion engine, gas turbine, micro fuel engine, fuel cell, Wind turbines, photoelectricity unit.
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