CN107977772A - One kind considers the probabilistic distribution network planning method and system of distributed energy - Google Patents
One kind considers the probabilistic distribution network planning method and system of distributed energy Download PDFInfo
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Abstract
The invention discloses one kind to consider the probabilistic distribution network planning method and system of distributed energy, wherein, method comprises the following steps：Obtain power supply area distributed generation resource power producing characteristics curve and load characteristic curve；According to distributed generation resource power producing characteristics curve and load characteristic curve, the equivalent load in power supply area is calculated；According to the equivalent load, the complementary distance between each two substation is calculated；According to complementary distance, substation's group of some cooperations is divided, wherein, each substation's group includes at least two substations.By the distributed generation resource power producing characteristics curve and load characteristic curve of power supply area, the complementary distance between each two substation is calculated；Substation's group will be classified as with potential adjustable complementary substation according to complementary distance, so as to ensure existing substation utilizes in power supply area maximization, improve the utilization rate of substation, power transformation capacity of making rational planning for.
Description
Technical field
The present invention relates to electric power network technique field, and in particular to one kind considers the probabilistic distribution network planning of distributed energy
Method and system.
Background technology
Generate electricity in distributed energy under the background of access power grid on a large scale, distribution system there will be distributed generation resource
(Distributed Generation, referred to as DG), energy storage (Energy Storage, referred to as ES), electric automobile
A large amount of Singapore dollars such as (Electric Vehicle, referred to as EV), workload demand response (Demand Response, referred to as DR)
Part.System node and branch have bi-directional current, and the significant uncertain new feature with power electronics, power distribution system is presented
System function will become to provide integrated service, conventional electrical distribution net at the same time for load and distributed energy from single distribution electric energy development
Planing method faces huge challenge.
At present, conventional electrical distribution net planing method is mainly：First, the calculated load on the basis of Mid-long term load forecasting
Geographical distribution determines power transformation station location and power supply zone, while determines substation capacity according to the capacity-load ratio standard of rules.So
Afterwards, on the basis of the N-1 principle of sound accounting of network, circuit is planned according to mode hand in hand.Finally, to every circuit according to directive/guide
The corresponding protection of requirement configuration, communication and automation equipment.
Load simulation and the accuracy of prediction are most important to distribution network planning, directly affects the reasonability of electric grid investment
With the economy of operation.However, only accounted for as conventional electrical distribution network planning is standardized most serious operating mode situation (such as peak load it is pre-
Measured value), and use the history maximum of node load to carry out calculation and check to power distribution network weight bearing power and voltage's distribiuting, so make
Larger Capacity Margin generally can be all reserved in advance into programme, and monitoring hand is generally not provided with to distribution network planning system
Section.In load growth rate comparatively fast and in the case of distribution-free formula power supply (DG) access, this traditional approach still has its reasonability.But
It is that, with the development of intelligent distribution network, more and more actively, renewable energy power generation accounting is higher and higher, causes power grid to transport for load
Uncertain factor in row is more and more.The above-mentioned deterministic planing method of tradition, necessarily causes distribution network flexibility low, former
Barrier risk such as is difficult to control at the negative consequences, and the obstacle that these are likely to become the access of extensive regenerative resource.
The content of the invention
In view of this, an embodiment of the present invention provides one kind to consider the probabilistic distribution network planning method of distributed energy
And system, to solve the problems, such as that distribution network flexibility is low.
First aspect present invention provide it is a kind of consider the probabilistic distribution network planning method of distributed energy, including with
Lower step：
Obtain power supply area distributed generation resource power producing characteristics curve PG (t) and load characteristic curve；
According to the distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t), the service area is calculated
Equivalent load Pdeng (t) in domain；
According to the equivalent load Pdeng (t), the complementary distance between each two substation is calculated；
According to the complementary distance, substation's group of some cooperations is divided, wherein, each substation's group includes
At least two substations.
Alternatively, according to the distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t), institute is calculated
The equivalent load Pdeng (t) in power supply area is stated, including：
Using the distributed generation resource power producing characteristics curve PG (t), the average mark cloth power supply for calculating each moment point goes out
Power PGave (t)；
The equivalent load Pdeng (t) is calculated using equation below：
Pdeng (t)=PL (t)-PGave (t).
Alternatively, it is described according to equivalent load Pdeng (t), calculate the complementary distance between each two substation, including with
Lower step：
According to the equivalent load Pdeng (t), the phase relation that each power supply area power supply is contributed between load is determined
Number；
According to the related coefficient, the complementary distance is calculated.
Optionally it is determined that the related coefficient between each two substation equivalent load, is calculated using equation below：
Wherein, Cij(t) it is (the phase relation between substation i and substation's j) equivalent loads of t moment each two substation
Number, Pdengi(t) equivalent load for being substation i described in t moment, Pdengj(t) equivalent negative for being substation j described in t moment
Lotus, cov (Pdengi(t),Pdengj(t)) association between the equivalent load of t moment substation i and the equivalent load of substation j
Variance, var (Pdengi(t)) variance for the equivalent load for being t moment substation i, var (Pdengj(t)) it is t moment substation j
Equivalent load variance.
Alternatively, using equation below, the complementary distance is calculated：
Dij(t)=a2×Cij(t)+a2×disij；
Wherein, DijComplementary distance between substation i and substation j, Cij(t) (become for t moment each two substation
Related coefficient between power station i and substation's j) equivalent loads, disijFor the electrical distance between substation i and substation j,
a1, a2Respectively proportionality coefficient.
Alternatively, it is described according to the complementary distance, substation's group of some cooperations is divided, is comprised the following steps：
Judge whether the complementary distance is less than pre-determined distance threshold value；
When the complementary distance is less than the distance threshold, two substations are divided into the same substation
Group.
Alternatively, further include：
Judge whether substation's group meets the load point of corresponding region；
When substation's group is unsatisfactory for the load point of corresponding region, change is created according to the carry calculation of the load point
The capacity in power station.
Alternatively, the carry calculation according to the load point increases the capacity of substation newly, using equation below：
Using minimum investment and annual operating cost as object function, to meet equivalent load demand as constraints, carry out
Dynamic Programming calculates.
Object function：MinC=C1+C2；
Constraints：
Wherein, C is year comprehensive cost, and C1 is investment and the operating cost of substation, and C2 is that the substation of clearing occurs
Construction cost and cost of losses, WjFor the load (i.e. active power) of j-th of load point, SiFor the appearance of i-th of newly-built substation
Amount, e (Si) it is i-th of load factor for creating substation,For power factor, JiThe collection of load is supplied for i-th of substation
Close, dijBy i-th of substation and its for the electrical distance between j-th load point, L is radius of electricity supply.
Second aspect of the present invention provides a kind of distribution network planning system, including：
Acquiring unit, for obtaining the distributed generation resource power producing characteristics curve PL (t) and load characteristic curve of power supply area
PL(t)；
First computing unit, for according to the distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL
(t), the equivalent load Pdeng (t) in the power supply area is calculated；
Second computing unit, for according to the equivalent load Pdeng (t), calculating the complementation between each two substation
Distance；
Division unit, for according to the complementary distance, dividing substation's group of some cooperations, wherein, Mei Gesuo
Stating substation's group includes at least two substations.
Third aspect present invention provides a kind of computer program product, including at least one processor；And with it is described
The memory of at least one processor communication connection；Wherein, the memory storage has what can be performed by one processor
Instruction, described instruction are performed by least one processor, so that at least one processor performs first party of the present invention
The probabilistic distribution network planning method of consideration distributed energy any one of face or first aspect.
Fourth aspect present invention provides a kind of non-transient computer readable storage medium storing program for executing, and the non-transient computer is readable
Storage medium stores computer instruction, and the computer instruction is used to make computer perform first aspect present invention or first aspect
Any one of the probabilistic distribution network planning method of consideration distributed energy.
Technical solution provided by the invention, has the following advantages that：
1. distribution network planning method provided in an embodiment of the present invention, bent by the distributed generation resource power producing characteristics of power supply area
Line and load characteristic curve, calculate the equivalent load in power supply area；According to the equivalent load, calculate between each two substation
Complementary distance；Substation's group will be classified as with potential adjustable complementary substation according to complementary distance, so as to ensure to supply
The maximization that existing substation utilizes in electric region, improves the utilization rate of substation；In addition, by periodically in power supply area
Power supply is contributed and the monitoring of load, adjusts the combination of substation's cooperation in the power supply area in time so that distribution network
Flexibility is higher.
2. distribution network planning method provided in an embodiment of the present invention, wherein, utilize each two substation etc. in power supply area
The electrical distance between correlation and the Liang Ge substations between load is imitated, determines the complementary distance between substation, is ensured
There is correlation between the complementation distance and the power supply requirement of power supply area；It can ensure that the complementation distance is according to power transformation
What the geographical location stood and the actual demand to power distribution network were configured, reliability is higher, disclosure satisfy that for power distribution network
Demand.
3. distribution network planning method provided in an embodiment of the present invention, further includes to existing substation's group and corresponding service area
The judgement of supply-demand relationship between domain, when judging supply-demand relationship imbalance, implements substation's group of adjustment cooperation
Capacity；In addition, when the capacity for judging current transformer substation is unable to meet demand, newly-increased power transformation can be carried out according to supply-demand relationship
Stand the planning of capacity, there is preferable practical application effect.
4. distribution network planning system provided in an embodiment of the present invention, can will have potential adjustable complementation according to complementary distance
Substation be classified as substation's group, so as to ensure existing substation utilizes in power supply area maximization, improve substation
Utilization rate；In addition, by periodically to the power supply output in power supply area and the monitoring of load, adjusting in time in the power supply area
The combination of substation's cooperation so that the flexibility of distribution network is higher.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood by reference to attached drawing, attached drawing is schematically without that should manage
Solve to carry out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 shows a flow chart specifically illustrated of distribution network planning method in the embodiment of the present invention 1；
Fig. 2 shows a flow chart specifically illustrated of distribution network planning method in the embodiment of the present invention 2；
Fig. 3 shows a flow chart specifically illustrated of distribution network planning method in the embodiment of the present invention 3；
Fig. 4 shows a flow chart specifically illustrated of distribution network planning system in the embodiment of the present invention 4；
Fig. 5 shows another flow chart specifically illustrated of distribution network planning system in the embodiment of the present invention 4；
Fig. 6 shows a structure diagram specifically illustrated of 5 Computer program product of the embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
All other embodiments obtained under the premise of creative work are made, belong to the scope of protection of the invention.
The regularity and random fluctuation characteristic changed according to wind energy, solar energy and electric load, defines dynamic random variable,
And propose to be superimposed to establish its probabilistic model with stochastic variable by definite changing rule
It will be apparent to a skilled person that after wind-power electricity generation, solar energy power generating distributed power grid,
The power flow changing of area power grid has certain randomness.When to the grid-connected tidal current analysis in area, by wind energy, solar energy and
The regularity and random fluctuation characteristic of electric load change, define dynamic random variable, and by definite changing rule with
Machine variable is superimposed to establish its probabilistic model.After the probabilistic model of foundation, you can to the dynamic probability trend of power grid
(Dynamic Probability Power Flow, referred to as DPPF) is calculated.
In probability statistics, the probability distribution of stochastic variable is defined as dynamic random with time changed model and is become
The probabilistic model (Probability Model of Dynamic Random Variable, referred to as PMDRV) of amount.For example,
Wind power generation output represents the electric energy that wind-force is capable of providing, after carrying out dynamic modeling to wind energy, you can is referred to as wind-power electricity generation
Output dynamic probability model；Solar energy power generating, which is contributed, represents the electric energy that is capable of providing of solar energy, to solar energy into action
After state modeling, you can be referred to as solar energy power generating output dynamic probability model；Electric load is represented in power grid needed for load
The electric energy to be consumed, can be referred to as electric load dynamic probability model after modeling.
Therefore, in the present invention, distributed generation resource output probability is to utilize power supply area interior power output dynamic probability mould
All distributed generation resources (wind energy, solar energy etc.) provide the probability distribution of electric energy in the power supply area that type analysis go out；Load is general
Rate is the probability distribution of the required electric energy of all load points in the power supply area analyzed using load dynamic probability model.
In addition, in power supply area described in the embodiment of the present invention, include some substations and some load points.In reality
, can be according to historical data before distribution network planning method in the existing present invention, and utilize the dependency relation analysis side of big data
Method, analysis distribution formula power supply, the changing rule and pattern of load, establish distributed generation resource processing dynamic probability model and load
Dynamic probability model.
Embodiment 1
A kind of consideration probabilistic distribution network planning method of distributed energy is provided in the embodiment of the present invention, such as Fig. 1 institutes
Show, this method comprises the following steps：
Step S11, obtains power supply area distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t), its
In, t for one day 24 points at different moments, value 0,1,2 ..., 23.
Distribution network planning system can handle probability and Load Probability to extract power supply area distributed generation resource in historical data,
And the dependency relation analysis method of big data is utilized, after analysis distribution formula power supply, the changing rule of load and pattern, foundation
Distributed generation resource output model and load model.Distribution network planning system can be from the distributed generation resource output probabilistic model and negative
Corresponding distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t) are analyzed in lotus dynamic probability model.
Distribution network planning system can also establish power supply area interior power according to historical data to contribute between load
Supply-demand relationship, and distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t) are analyzed from supply-demand relationship；
Only it need to ensure that distribution network planning system can get power supply area distributed generation resource power producing characteristics curve PG (t) and part throttle characteristics
Curve PL (t).
Wherein, distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t) correspond to one day 24 moment
The characteristic curve of point, i.e. t values are 0,1,2 ..., 23.
Step S12, according to distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t), calculates service area
Equivalent load Pdeng (t) in domain.
The relation that equivalent load in power supply area can utilize distributed generation resource to contribute between load is drawn, that is, is passed through
Original stochastic problems are transformed into using method by certain problem.For example, the distributed generation resource of each moment point can be calculated
The average value of output and the average value of load, the equivalent negative being equivalent to the difference of above-mentioned two average value in power supply area
Lotus；The difference that the corresponding distributed generation resource of each moment point is contributed between load can also be calculated first, then corresponded to every
A moment point calculates the average value of the difference；The average value that each moment point distributed generation resource is contributed can also be only calculated, then
The difference between power supply processing average value and load is calculated corresponding to each moment point, which is equivalent to equivalent load Pdeng
(t)。
Step S13, according to equivalent load Pdeng (t), calculates the complementary distance between each two substation.
Wherein, the capacity of substation is different in power supply area, can by the capacity complementation intermodulation between different substation,
Realize equivalent load Pdeng (t) demands different in power supply area.To the complementary mutual timing of the capacity between different transformation stations,
It is contemplated that in power supply area equivalent load Pdeng (t) to the demand of net capacity, can also according to the demand of net capacity with
And the relation between the geographical location of substation considers.I.e. complementary distance is used to represent that the complementation between Liang Ge substations is mutual
The ability of tune.
Step S14, according to complementary distance, divides substation's group of some cooperations, wherein, each substation's group includes
At least two substations.
After the complementary distance between determining each two substation, all complementary distances can be ranked up, will be mutual
Mend substation's group that closely located substation is divided into cooperation；Can also be directly to the complementary distance that calculates with it is pre-
If value is compared, when condition meets, substation's group of cooperation is divided into.
The present embodiment is considering the uncertainty of distributed generation resource, will have potential adjustable complementation according to complementary distance
Substation be classified as substation's group, so as to ensure existing substation utilizes in power supply area maximization, improve substation
Utilization rate；In addition, by periodically to the power supply output in power supply area and the monitoring of load, adjusting in time in the power supply area
The combination of substation's cooperation so that the flexibility of distribution network is higher.
Embodiment 2
A kind of distribution network planning method is provided in the embodiment of the present invention, as shown in Fig. 2, this method comprises the following steps：
Step S21, obtains power supply area distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t), its
In, t for one day 24 points at different moments, value 0,1,2 ..., 23.Identical with 1 step of embodiment, details are not described herein.
Step S22, according to distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t), calculates service area
Equivalent load Pdeng (t) in domain.
In the present embodiment, the uncertainty of distributed generation resource is considered, utilize distributed generation resource power producing characteristics curve PG
(t), calculate each moment point is evenly distributed power supply output PGave (t)：
For example, the distributed generation resource power producing characteristics curve of storage can be extracted from the historical data of distribution network planning system
(exemplified by 30 days), calculate the average value P Gave (t) that the distributed generation resource of each moment point is contributed respectively, as shown in the table：
Relation between 1 distributed generation resource power producing characteristics curve of table and average mark cloth power supply output
Contributed by existing exemplary distribution formula power supply, determine the average that the distributed generation resource of t moment is contributed, finally obtain
Original stochastic problems, are transformed into certain problem by average mark cloth power supply output PGave (t) by the method for sampling.
In addition, by load characteristic curve PL (t) and average mark cloth power supply output PGave (t), equivalent load is equivalent to
Pdeng (t), equivalent load Pdeng (t) is calculated using equation below：
Pdeng (t)=PL (t)-PGave (t)；
By above-mentioned calculating can by distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t) this two
A variable is equivalent to a variable, i.e. equivalent load Pdeng (t).
Step S23, according to equivalent load Pdeng (t), calculates the complementary distance between each two substation.
In the present embodiment, by equivalent load Pdeng (t), each two substation equivalent negative in power supply area is analyzed first
Correlation between lotus；Then according to correlation, the complementary distance between each two substation is determined.Using in power supply area
Power supply contribute and the correlation between load consumption, realize the adjustment of the complementary distance between substation, reach calculate it is mutual
Mend the higher purpose of the reliability of distance.Specifically, comprise the following steps：
Step S231, according to equivalent load Pdeng (t), determines the related coefficient between each two substation equivalent load.
Calculated using equation below, the related coefficient between each two substation equivalent load：
Wherein, Cij(t) it is (the phase relation between substation i and substation's j) equivalent loads of t moment each two substation
Number, Pdengi(t) equivalent load for being t moment substation i, Pdengj(t) equivalent load for being t moment substation j, cov
(Pdengi(t),Pdengj(t)) covariance between the equivalent load of t moment substation i and the equivalent load of substation j,
var(Pdengi(t)) variance for the equivalent load for being t moment substation i, var (Pdengj(t)) for t moment substation j etc.
Imitate the variance of load.
By calculating two variable Pdengi(t)、Pdengj(t) related coefficient between, so that it may judge the phase between two variables
Pass degree.Related coefficient has following characteristic：0≤Cij(t)≤1；
Work as Cij(t)=0 when, Pdeng is representedi(t)、Pdengj(t) independently of each other；
Work as Cij(t)=1 when, Pdeng is representedi(t)、Pdengj(t) it is perfectly correlated.
In the present embodiment, related coefficient between two substation's equivalent load of power supply area is the covariance of standardization, energy
Enough eliminate due to the amplitude of variation of different substation equivalent load, the influence to related coefficient result of calculation, only simple reaction
Similarity degree during substation's equivalent load per unit change, has higher reliability.
Step S232, according to related coefficient, calculates complementary distance.
In the present embodiment, contributed degree of correlation between load and substation by power supply area distributed generation resource
Physical location (electrical distance between Ji Liang substations), calculates the complementary distance between Liang Ge substations, i.e.,：
Dij(t)=a1×Cij(t)+a2×disij；
Wherein, Dij(t) the complementary distance between substation i and substation j, Cij(t) it is t moment each two substation
(related coefficient between substation i and substation's j) equivalent loads, disijBetween substation i and substation j it is electric away from
From a1, a2Respectively proportionality coefficient.a1, a2Concrete numerical value be configured according to actual conditions, value be 0 to 1.
Using between the correlation between power supply area Nei Liang substations equivalent load and Liang Ge substations it is electric away from
From, determine the complementary distance between substation, ensure that between the complementation distance and the power supply requirement of power supply area have it is related
Property；It is that the geographical location according to substation and the actual demand to power distribution network are configured that can ensure the complementation distance
, reliability is higher, disclosure satisfy that for the demand to power distribution network.
Step S24, according to the complementary distance, divides substation's group of some cooperations, wherein, each power transformation
Group of standing includes at least two substations.
After calculating complementary distance, by complementary distance compared with given threshold, when complementary distance is less than setting threshold
During value, then two substations are divided into same substation's group.Wherein, given threshold is the practical operation situation according to substation,
The numerical value determined by mathematical methods such as probability, sections, general value are 0 to 1.The given threshold is combined after can ensureing division
Substation's group of operation has preferable convergence and robustness in process of distributing electricity.
Embodiment 3
A kind of distribution network planning method is provided in the embodiment of the present invention, as shown in figure 3, this method comprises the following steps：
Step S31, obtains power supply area distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t), its
In, t for one day 24 points at different moments, value 0,1,2 ..., 23.
Identical with 2 step S21 of embodiment, details are not described herein.
Step S32, according to distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t), calculates service area
Equivalent load Pdeng (t) in domain.
Identical with 2 step S22 of embodiment, details are not described herein.
Step S33, according to equivalent load Pdeng (t), calculates the complementary distance between each two substation.
Identical with 2 step S23 of embodiment, details are not described herein.
Step S34, according to the complementary distance, divides substation's group of some cooperations, wherein, each power transformation
Group of standing includes at least two substations.
Identical with 2 step S24 of embodiment, details are not described herein.
Step S35, judges whether substation's group meets the load point of corresponding region.If not satisfied, then perform step S36；
Otherwise, step S31 is performed.
After the mutual complementary programming of intermodulation is carried out to the substation of power supply area, the demand of all load points of power supply area is obtained,
Judge that substation's group after adjusting at this time disclosure satisfy that the demand of corresponding region.Judge that electric energy at this time is exported between demand
Whether equilibrium state is reached.If it is impossible to meet demand for output, then it represents that it is impossible to meet load point for the power grid after adjustment
Demand is, it is necessary to newly-increased substation.
If disclosure satisfy that demand, distribution network planning system detects distributed generation resource output probability in power supply area in real time
Correlation between Load Probability, carries out substation timely complementary intermodulation, the calm stability for ensureing operation of power networks with
Reliability.
Step S36, the capacity of substation is created according to the carry calculation of load point.
In demand of the power grid after distribution network planning system is judged to adjust it is impossible to meet load point, with minimum throwing
Money and annual operating cost are object function, to meet equivalent load demand as constraints, carry out Dynamic Programming calculating and trend
Calculate, determine substation capacity.Can specifically equation below be used to calculate：
Object function：MinC=C1+C2；
Constraints：
Wherein, C is year comprehensive cost, and C1 is investment and the operating cost of substation, and C2 is that the substation of clearing occurs
Construction cost and cost of losses, WjFor the load (i.e. active power) of j-th of load point, SiFor the appearance of i-th of newly-built substation
Amount, e (Si) it is i-th of load factor (current loads divided by power transformation capacity) for creating substation,For power factor, JiFor
I substation supplies the set of load, dijBy i-th of substation and its be for the electrical distance between j-th load point, L
Radius of electricity supply.
By the judgement to the supply-demand relationship between existing substation's group and corresponding power supply area, supply and demand pass is being judged
When system is uneven, implement the capacity of substation's group of adjustment cooperation；In addition, cannot in the capacity for judging current transformer substation
During meet demand, the planning of newly-increased substation capacity can be carried out according to supply-demand relationship, there is preferable practical application effect.
Embodiment 4
The present embodiment provides a kind of distribution network planning system, can be used for performing the power distribution network in embodiment 1 to embodiment 3
Planing method, as shown in figure 4, the distribution network planning system includes：
Acquiring unit 41, the distributed generation resource power producing characteristics curve PG (t) and part throttle characteristics for obtaining power supply area are bent
Line PL (t), wherein, t for one day 24 points at different moments, value 0,1,2 ..., 23.
First computing unit 42, for according to distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL
(t), the equivalent load Pdeng (t) in the power supply area is calculated；
Second computing unit 43, it is mutual between each two substation for according to the equivalent load Pdeng (t), calculating
Mend distance.
Division unit 44, for according to complementary distance, dividing substation's group of some cooperations, wherein, it is each described
Substation's group includes at least two substations.
By the way that according to complementary distance substation's group will be classified as with potential adjustable complementary substation, so as to ensure to supply
The maximization that existing substation utilizes in electric region, improves the utilization rate of substation；In addition, by periodically in power supply area
Power supply is contributed and the monitoring of load, adjusts the combination of substation's cooperation in the power supply area in time so that distribution network
Flexibility is higher.
As a kind of optional embodiment of the present embodiment, as shown in figure 5, the second computing unit 43 includes：
Determination subelement 431, for according to equivalent load Pdeng (t), determining between each two substation equivalent load
Related coefficient.
Computation subunit 432, for according to related coefficient, calculating complementary distance.
As another optional embodiment of the present embodiment, as shown in figure 5, the distribution network planning system further includes：
Judging unit 45, for judging whether substation's group meets the load point of corresponding region.
3rd computing unit 46, during load point for being unsatisfactory for corresponding region when substation's group, according to the negative of load point
Lotus calculates the capacity of newly-built substation.
Embodiment 5
Originally apply example and a kind of computer program product is provided, available for the distribution network planning performed in embodiment 1 to embodiment 3
Method.
Fig. 6 is the hardware architecture diagram of computer program product provided in an embodiment of the present invention, as shown in fig. 6, the meter
Calculation machine program product includes one or more processors 61 and memory 62, in Fig. 6 by taking a processor 61 as an example.
The computer program product can also include：Image display (not shown), is distributed for showing in power supply area
The result of formula power supply power producing characteristics curve and load characteristic curve.Processor 61, memory 62 and image display can lead to
Cross bus or other modes connect, in Fig. 6 exemplified by being connected by bus.
Processor 61 can be central processing unit (Central Processing Unit, CPU).Processor 61 can be with
For other general processors, digital signal processor (Digital Signal Processor, DSP), application-specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
The chips such as discrete hardware components, or the combination of above-mentioned all kinds of chips.General processor can be microprocessor or the processing
Device can also be any conventional processor etc..
Memory 62 is used as a kind of non-transient computer readable storage medium storing program for executing, available for storing non-transient software program, non-
Transient computer executable program and module, as the corresponding programmed instruction of distribution network planning method in the embodiment of the present invention/
Module.Processor 61 is stored in non-transient software program, instruction and module in memory 62 by operation, so as to perform clothes
The various function application of business device and data processing, that is, realize in above-described embodiment, distribution network planning method.
Memory 62 can include storing program area and storage data field, wherein, storing program area can storage program area,
At least one required application program of function；Storage data field can be stored uses what is created according to distribution network planning system
Data etc..In addition, memory 62 can include high-speed random access memory, non-transient memory can also be included, such as extremely
Few a disk memory, flush memory device or other non-transient solid-state memories.In certain embodiments, memory 62
It is optional including network connection to power distribution network can be passed through relative to the remotely located memory of processor 61, these remote memories
Planning system.The example of above-mentioned network includes but not limited to internet, intranet, LAN, mobile radio communication and its group
Close.
One or more of modules are stored in the memory 62, when by one or more of processors 61
During execution, the distribution network planning method any one of embodiment 1 to embodiment 3 is performed.
The said goods can perform the method that the embodiment of the present invention is provided, and possesses the corresponding function module of execution method and has
Beneficial effect.The ins and outs of detailed description, the correlation that for details, reference can be made in embodiment 1 to embodiment 3 are not retouched in the present embodiment
State.
Embodiment 6
The embodiment of the present invention additionally provides a kind of non-transient computer storage medium, and the computer-readable storage medium is stored with
Computer executable instructions, the computer executable instructions can perform the power distribution network any one of embodiment 1 to embodiment 3
Planing method.Wherein, the storage medium can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM),
Random access memory (Random Access Memory, RAM), flash memory (Flash Memory), hard disk (Hard
Disk Drive, abbreviation：) or solid state hard disc (Solid-State Drive, SSD) etc. HDD；The storage medium can also wrap
Include the combination of the memory of mentioned kind.
It is to lead to it will be understood by those skilled in the art that realizing all or part of flow in above-described embodiment method
Computer program is crossed to instruct relevant hardware to complete, the program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case of various modification can be adapted and modification, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (10)
1. one kind considers the probabilistic distribution network planning method of distributed energy, it is characterised in that comprises the following steps：
Obtain power supply area distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t)；
According to the distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t), calculate in the power supply area
Equivalent load Pdeng (t)；
According to the equivalent load Pdeng (t), the complementary distance between each two substation is calculated；
According to the complementary distance, substation's group of some cooperations is divided, wherein, each substation's group is included at least
Two substations.
2. planing method according to claim 1, it is characterised in that according to the distributed generation resource power producing characteristics curve PG
(t) with load characteristic curve PL (t), the equivalent load Pdeng (t) in the power supply area is calculated, including：
Using the distributed generation resource power producing characteristics curve PG (t), the average mark cloth power supply for calculating each moment point is contributed
PGave(t)；
The equivalent load Pdeng (t) is calculated using equation below：
Pdeng (t)=PL (t)-PGave (t).
3. planing method according to claim 2, it is characterised in that it is described according to equivalent load Pdeng (t), calculate every
Complementary distance between Liang Ge substations, comprises the following steps：
According to the equivalent load Pdeng (t), the related coefficient between each two substation equivalent load is determined；
According to the related coefficient, the complementary distance is calculated.
4. planing method according to claim 2, it is characterised in that determine the phase between each two substation equivalent load
Relation number, is calculated using equation below：
<mrow>
<msub>
<mi>C</mi>
<mrow>
<mi>i</mi>
<mi>j</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfrac>
<mrow>
<mi>cov</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>Pdeng</mi>
<mi>i</mi>
</msub>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
<mo>,</mo>
<msub>
<mi>Pdeng</mi>
<mi>j</mi>
</msub>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
</mrow>
<msqrt>
<mrow>
<mi>var</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>Pdeng</mi>
<mi>i</mi>
</msub>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mo>&times;</mo>
<mi>var</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>Pdeng</mi>
<mi>j</mi>
</msub>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
</mrow>
</msqrt>
</mfrac>
<mo>;</mo>
</mrow>
Wherein, Cij(t) for t moment each two substation (related coefficient between substation i and substation's j) equivalent loads,
Pdengi(t) equivalent load for being t moment substation i, Pdengj(t) equivalent load for being t moment substation j, cov (Pdengi
(t),Pdengj(t)) covariance between the equivalent load of t moment substation i and the equivalent load of substation j, var
(Pdengi(t)) variance for the equivalent load for being t moment substation i, var (Pdengj(t)) equivalent negative for being t moment substation j
The variance of lotus.
5. planing method according to claim 4, it is characterised in that using equation below, calculate the complementary distance：
Dij(t)=a1×Cij(t)+a2×disij；
Wherein, Dij(t) the complementary distance between substation i and substation j, Cij(t) it is (the power transformation of t moment each two substation
The related coefficient stood between i and substation's j) equivalent loads, disijFor the electrical distance between substation i and substation j, a1,
a2Respectively proportionality coefficient.
6. planing method according to any one of claim 1 to 5, it is characterised in that it is described according to the complementary distance,
Substation's group of some cooperations is divided, is comprised the following steps：
Judge whether the complementary distance is less than pre-determined distance threshold value；
When the complementary distance is less than the distance threshold, two substations are divided into same substation's group.
7. planing method according to any one of claim 1 to 6, it is characterised in that further include：
Judge whether substation's group meets the load point of corresponding region；
When substation's group is unsatisfactory for the load point of corresponding region, substation is created according to the carry calculation of the load point
Capacity.
8. planing method according to claim 7, it is characterised in that the carry calculation according to the load point increases newly
The capacity of substation, using equation below：
Object function：MinC=C1+C2；
Constraints：
Wherein, C is year comprehensive cost, and C1 is investment and the operating cost of substation, and C2 is the construction that the substation of clearing occurs
Expense and cost of losses, WjFor the load (i.e. active power) of j-th of load point, SiFor the capacity of i-th of newly-built substation, e
(Si) it is i-th of load factor for creating substation,For power factor, JiThe set of load, d are supplied for i-th of substationij
By i-th of substation and its for the electrical distance between j-th load point, L is radius of electricity supply.
A kind of 9. distribution network planning system, it is characterised in that including：
Acquiring unit, for obtaining the distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL of power supply area
(t)；
First computing unit, for according to the distributed generation resource power producing characteristics curve PG (t) and load characteristic curve PL (t),
Calculate the equivalent load Pdeng (t) in the power supply area；
Second computing unit, for according to the equivalent load Pdeng (t), calculating the complementary distance between each two substation；
Division unit, for according to the complementary distance, dividing substation's group of some cooperations, wherein, each change
Power station group includes at least two substations.
10. a kind of non-transient computer readable storage medium storing program for executing, it is characterised in that the non-transient computer readable storage medium storing program for executing is deposited
Computer instruction is stored up, the computer instruction is used to make the consideration distribution any one of computer perform claim requirement 1 to 8
The probabilistic distribution network planning method of the formula energy.
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