CN113191827A - Method, system, device and medium for determining blocking cost of marketable load - Google Patents
Method, system, device and medium for determining blocking cost of marketable load Download PDFInfo
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Abstract
The invention belongs to the field of electric power automation, and discloses a method, a system, equipment and a medium for determining the blocking cost of a marketized load, which comprise the following steps: acquiring the subordination relation between each physical load and each marketized load and each load center in the power system; acquiring the sensitivity of each section active power to each physical load active power in the power system; obtaining the sensitivity of each section active power to each marketized load according to each physical load, the subordination relation between each marketized load and each load center and the sensitivity of each section active power to each physical load active power; and clearing based on the sensitivity of each section active power to each physical load and the sensitivity of each section active power to each marketized load to obtain the node price of each marketized load, and taking the blocking component in the node price of each marketized load as the blocking cost of each marketized load. The blocking costs can be obtained without specifying the actual physical connection points of the marketized load to participate in the power spot market.
Description
Technical Field
The invention belongs to the field of electric power automation, and relates to a method, a system, equipment and a medium for determining the blocking cost of a marketable load.
Background
With the advance of the reformation of the electric power market, the construction rhythm of the electric power spot market is gradually accelerated, the spot market construction and test unit enters the simulation test operation, and the spot market clearing key technology for unilateral bidding on the power generation side and the like have certain theoretical and practical experience. With the steady advance of the reformation of the electric power spot market, the double-side bidding spot market routes of the power generation side and the load side which can find the allocation value of market resources are generally selected, compared with the single-side market, the double-side bidding of the power generation side and the load side is more consistent with the characteristics of the common commodity market, and both the supply side and the demand side can respond to market signals and reflect the value rule of the allocation of the market resources.
The spot market generally has three pricing modes, the first is a system unified marginal pricing mode, the second is a node marginal pricing mode, and the last is a partition pricing mode. The system unified marginal pricing means that under the condition that unit operation constraint is met, the unit price is ranked from low to high according to the unit price, the last unit price meeting load is the system unified marginal price, and the system unified marginal price is different from other two pricing modes in that the influence of a power grid blocking factor is not considered, namely the value difference of electric energy in different geographic positions is not considered. The node marginal electricity price is the minimum production cost generated for supplying the next electric power by considering all power transmission constraints and utilizing all available power generation and utilization resources at a specific position, and is used for measuring the energy value of a certain node at the moment in the current system operation state, and the node electricity price generally comprises three components, namely an electric energy component, a blocking component and a network loss component. The partition marginal electricity price is a system unified marginal electricity price, and the thinning after the blocking is considered, and the partition marginal electricity price is still a simplification of a node marginal electricity price mechanism essentially.
Currently, marketized loads need to participate in the electric power spot market based on a two-sided bidding spot market route on the power generation side and the load side. On one hand, because the quantity of the marketized loads is large, the marketized loads participate in the electric power spot wholesale market in the form of power selling companies and power consumers, and taking the provincial scale as an example, the number of 220kV power consumers is more than 100, the number of 110kV power consumers is more than 350, and 500 power selling companies of medium and small-sized consumers are proxied; on the other hand, the physical connection point of the marketized load participating in the electric power spot market changes along with the change of the proxy relationship and the physical topology, so that the blocking cost cannot be directly determined through the physical node where the marketized load is located, and the blocking cost of the node electricity price cannot be obtained.
Disclosure of Invention
The present invention is directed to overcome the defect in the prior art that the blocking cost cannot be directly determined by the physical node where the marketable load is located, and therefore the blocking cost of the node electricity price cannot be obtained, and provides a method, a system, a device and a medium for determining the blocking cost of the marketable load.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
in a first aspect of the present invention, a method for determining a blocking cost of a marketable load includes the following steps:
acquiring the subordination relation between each physical load and each marketized load and each load center in the power system;
acquiring the sensitivity of each section active power to each physical load active power in the power system;
obtaining the sensitivity of each section active power to each marketized load according to each physical load, the subordination relation between each marketized load and each load center and the sensitivity of each section active power to each physical load active power;
and clearing based on the sensitivity of each section active power to each physical load and the sensitivity of each section active power to each marketized load to obtain the node price of each marketized load, and taking the blocking component in the node price of each marketized load as the blocking cost of each marketized load.
The method for determining the blocking cost of the marketized load further improves the following steps:
the specific method for acquiring the subordination relationship between each physical load and each marketized load and each load center in the power system comprises the following steps: and obtaining the subordination relation between each physical load and each marketable load and each load center according to the physical loads and the geographical areas of each marketable load and each load center.
The specific method for acquiring the sensitivity of each section active power to each physical load active power in the power system comprises the following steps: acquiring susceptance of each line in a power system; and obtaining the sensitivity of each section active power to each physical load active power in the power system based on a direct current power flow algorithm according to the susceptance of each line in the power system.
The specific method for obtaining the sensitivity of each section active power to each marketable load active power according to each physical load, the subordination relationship between each marketable load and each load center, and the sensitivity of each section active power to each physical load active power is as follows: acquiring a load distribution coefficient of each physical load in a subordinate load center based on each physical load and the subordinate relation with each load center; according to the load distribution coefficient of each physical load in the subordinate load center and the sensitivity of each section active power to each physical load active power, obtaining the sensitivity of each section active power to each load center; and obtaining the sensitivity of each section to the active work of each marketable load according to the sensitivity of each section to the active work of each load center and the subordination relation between each marketable load and each load center.
The specific method for acquiring the load distribution coefficient of each physical load in the subordinate load center is as follows: acquiring each physical load and a load value of each load center; the proportion of the load value of each physical load to the load value of the subordinate load center is taken as a load distribution coefficient.
The specific method for obtaining the sensitivity of each section to each load center is as follows: traversing each physical load, and multiplying the active sensitivity of each section to the current physical load by the load distribution coefficient of the current physical load in the subordinate load center to obtain each section component of each physical load; and traversing each load center, and correspondingly overlapping each section component of all the physical loads subordinate to the current load center according to the sections to obtain the sensitivity of each section to the success of each load center.
The specific method for obtaining the active sensitivity of each section to each marketized load comprises the following steps: the sensitivity of each cross section to the success of each load center is defined as the sensitivity of each cross section to the success of each marketable load subordinate to each load center.
In a second aspect of the present invention, a system for determining blocking cost of a marketable load comprises:
the first acquisition module is used for acquiring the subordination relation between each physical load and each marketized load and each load center in the power system;
the second acquisition module is used for acquiring the sensitivity of each section active power to each physical load active power in the power system;
the sensitivity determining module is used for obtaining the sensitivity of each section active power to each marketized load according to each physical load, the subordination relation between each marketized load and each load center and the sensitivity of each section active power to each physical load active power;
and the blocking cost determining module is used for clearing the sensitivity of each section active power to each physical load and the sensitivity of each section active power to each marketized load active power to obtain the node price of each marketized load, and taking the blocking component in the node price of each marketized load as the blocking cost of each marketized load.
In a third aspect of the present invention, a computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the blocking cost determination method for marketable loads when executing the computer program.
In a fourth aspect of the present invention, a computer-readable storage medium stores a computer program, which when executed by a processor, implements the steps of the above-mentioned method for determining blocking costs of a marketable load.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method for determining the blocking cost of marketized loads, which comprises the steps of firstly obtaining the subordination relation between each physical load and each load center in a power system and each section active power sensitivity to each physical load in the power system, further obtaining the active sensitivity of each section active power to each marketized load according to the two information, further clearing the active sensitivity of each section active power to each marketized load and the active sensitivity of each section active power to each physical load to obtain the node price of each marketized load, wherein the blocking component in the node price of each marketized load is the blocking cost of each marketized load, further obtaining the blocking cost of each marketized load under the condition that an actual physical connection point of the marketized load participating in the power spot market is not required to be appointed, and being beneficial to solving the blocking pricing problem of the power selling company and the power users with lower voltage level participating in the power spot market, meanwhile, according to the blocking cost of each marketized load, power generation side resources and power grid companies can be guided to invest in areas with high blocking cost, and energy is saved.
Furthermore, the subordination relation between each physical load and each marketized load and each load center is obtained according to the physical loads and the geographical area where each marketized load and each load center are located, and the subordination relation is determined in a geographical area mode, so that the method is convenient to implement and has better actual operability.
Drawings
Fig. 1 is a flowchart of a method for determining blocking cost of a marketable load according to an embodiment of the present invention;
fig. 2 is a graph of electricity prices, electric energy price components, and blocking costs of a marketing load 96 time period node according to an embodiment of the present invention;
fig. 3 is a block diagram of a congestion cost determination system for a marketable load according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, in an embodiment of the present invention, a method for determining blocking costs of marketable loads is provided, which can obtain node prices of each marketable load without specifying an actual physical connection point where the marketable load participates in a power spot distribution market, and reflect the blocking costs of each marketable load participating in the power spot market through a blocking component in the node prices of each marketable load. Specifically, the method for determining the blocking cost of the marketable load comprises the following steps.
S1: and acquiring the subordination relation between each physical load and each marketized load in the power system and each load center.
In this embodiment, the method for obtaining the dependency relationship between each physical load and each marketable load and each load center in the power system includes: and obtaining the subordination relation between each physical load and each marketable load and each load center according to the physical loads and the geographical areas of each marketable load and each load center.
Specifically, for an electric power system without a defined load center, the load center in the electric power system needs to be defined first. The load center refers to a region where loads are relatively concentrated in the power system, and may be specified according to an administrative region under the load center, or may be specified as a load center in the entire province, for example. The physical load refers to a load of a node of the power grid connected to an actual electrical load, and the node is also called a physical load node, i.e. a load node where a certain power supply occurs. The marketable load refers to an electric power selling company which takes the agent user into the bidding of the electric power spot market or an electric power user which directly takes the bidding of the electric power spot market.
And then, according to the geographical area, setting the subordination relation between each physical load and each marketized load and each load center, and identifying whether a certain physical load and a certain marketized load belong to a certain load center, so as to obtain the subordination relation between each physical load and each marketized load and each load center in the power system. By dividing the affiliation according to the geographical area, actual implementation and operation are facilitated.
S2: and acquiring the sensitivity of each section active power to each physical load active power in the power system.
In this embodiment, the sensitivity of each section active power to each physical load active power in the power system may be obtained by delaying historical data, or by the following method: acquiring susceptance of each line in a power system; and obtaining the sensitivity of each section active power to each physical load active power in the power system based on a direct current power flow algorithm according to the susceptance of each line in the power system.
Specifically, based on a direct current power flow algorithm, a general expression of an active power flow of the line ij is shown in formula (1):
Pij＝Bij(θi-θj) (1)
wherein i and j are respectively the head and tail end nodes of the line, PijFor active power flow at the beginning of line ijiAnd thetajIs the phase angle of the bus voltage at both ends of line ij, BijIs the susceptance of line ij.
Since the node injection power is the sum of the branch powers emitted by the node, the node power balance equation is shown in equation (2):
wherein, PiIs the injected power at node i and n is the total number of nodes in the power system.
The compound represented by formula (1) is introduced into formula (2):
wherein the content of the first and second substances,
is the sum of susceptance values of all lines directly connected to the node, Bi'j＝-BijThe susceptance value of the corresponding line is given a negative sign.
Wherein, B'iiAnd B'ijForm a matrix [ B']Except for the reference node, the other n-1 nodes of the diagonal element and the non-diagonal element in the node B have the same formula. Therefore, in an n-node power system, the node power balance equation can be expressed as shown in equation (4):
[P]＝[B'][θ] (4)
wherein:
wherein [ P ] and [ theta ] are respectively the active injection and voltage phase angle vectors of the order n-1, excluding the relevant quantities of the balance node as the angular reference point.
According to the general expression (1) of the active power flow of the branch circuit, the increment form can be written as:
ΔPij＝BijΔθi-BijΔθj＝Hij,iΔθi+Hij,jΔθj (8)
wherein, is defined asij,i＝Bij，Hij,j＝-Bij. All branches have power increment equations as in equation (8), which are written in matrix form to obtain equation (9):
[ΔPl]＝[H][Δθ] (9)
wherein:
wherein N islIs the number of branches, [ Delta P ]l]Is the branch active power increment vector, [ Delta theta ]]Is an incremental vector of phase angles of the node voltages, [ H ]]Is a matrix of k rows (n-1) columns whose elements define Hk,i＝Bij，Hk,j＝-BijMeaning: if the serial number k of a certain branch circuit and the serial numbers of the corresponding head end node and the tail end node are i and j, then for [ H ]]The elements of k rows and i columns in the matrix are equal to the susceptance H of the branchk,i＝BijFor the element in j rows and columns of k equal to the susceptance of the branch taking the negative sign Hk,j＝-Bij. Considering that the increments of the phase angles of the voltages at the nodes are all relative to the balanced nodes, the balanced nodes are not included in equation (9) and have the dimension n-1. The equation number contained in the formula (9) is equal to the number of branches NlAnd there is no linear correlation between these equations.
Linearize node Power balance equation (4) and multiply by [ B 'on both sides of the equation']-1Obtaining:
[Δθ]＝[B']-1[ΔP] (10)
the formula (10) can be substituted for the formula (9):
[ΔPl]＝[H][B']-1[ΔP]＝[S][ΔP] (11)
S＝[H][B']-1 (12)
wherein, [ Delta P ]]Is the node power variation, [ S ]]Dimension NlX (n-1), called the branch active power sensitivity matrix, reflects the effect of the increment of the single node active injection on the branch active, [ S]Corresponding element Sen inl,iThe sensitivity of the active power of the section l to the active power of the physical load node i is obtained, and then the sensitivity of the active power of each section in the power system to the active power of each physical load is obtained.
S3: and obtaining the sensitivity of each section active power to each marketized load according to each physical load, the subordination relation between each marketized load and each load center and the sensitivity of each section active power to each physical load active power.
In this embodiment, a specific method for obtaining the active sensitivity of each section to each marketable load includes: acquiring a load distribution coefficient of each physical load in a subordinate load center based on each physical load and the subordinate relation with each load center; according to the load distribution coefficient of each physical load in the subordinate load center and the sensitivity of each section active power to each physical load active power, obtaining the sensitivity of each section active power to each load center; and obtaining the sensitivity of each section to the active work of each marketable load according to the sensitivity of each section to the active work of each load center and the subordination relation between each marketable load and each load center.
The specific method for acquiring the load distribution coefficient of each physical load in the subordinate load center is as follows: acquiring each physical load and a load value of each load center; the proportion of the load value of each physical load to the load value of the subordinate load center is taken as a load distribution coefficient.
The sensitivity of the active power of each stable section to the load center can be obtained by calculating the load distribution coefficient of a certain physical load in the load center and the sensitivity of the active power of each stable section to the physical load, and the specific method for obtaining the sensitivity of the active power of each section to each load center is as follows: traversing each physical load, and multiplying the active sensitivity of each section to the current physical load by the load distribution coefficient of the current physical load in the subordinate load center to obtain each section component of each physical load; and traversing each load center, and correspondingly overlapping each section component of all the physical loads subordinate to the current load center according to the sections to obtain the sensitivity of each section to the success of each load center.
Specifically, the sensitivity of each section to the activity of each load center is obtained by the formula (14):
in the formula: senl,ldcenterSensitivity of active to active load center for section l, Sl,ldSensitivity of section i to physical load ld effort, DISTld,ldcenterIs the load distribution coefficient of the physical load ld in the negative center ldcenter.
The specific method for obtaining the active sensitivity of each section to each marketized load comprises the following steps: the sensitivity of each cross section to the success of each load center is defined as the sensitivity of each cross section to the success of each marketable load subordinate to each load center. Specifically, the sensitivity Sen of each cross-section active power to each marketable load bidld active power is obtained by the formula (15)l,bidld：
Senl,bidld＝Senl,ldcenter(bidld∈ldcenter) (15)。
S4: and clearing based on the sensitivity of each section active power to each physical load and the sensitivity of each section active power to each marketized load to obtain the node price of each marketized load, and taking the blocking component in the node price of each marketized load as the blocking cost of each marketized load.
Specifically, in this embodiment, when clearing is performed, a safety-constrained economic scheduling model is used for clearing, where the safety-constrained economic scheduling model is a clearing model commonly used in the electric power spot market, inputs of the safety-constrained economic scheduling model include physical load quotations, marketable load quotations and section active limits, and output results include physical load capacity, physical load node prices and marketable load node prices. Specifically, an objective function, a section active power constraint and a power balance constraint of the safety constraint economic dispatching model are constructed in the following manner.
The objective function is constructed to minimize the cost of electricity generation:
where F denotes the power generation cost, Cg (i, t) denotes the cost of the physical load node i at t, and Cld (i, t) denotes the cost of the marketable load bidld at t.
Based on the sensitivity of each section active power to each physical load active power and the sensitivity of each section active power to each marketized load active power, constructing a section active power constraint:
wherein Sensl,iSensitivity of active to active of the physical load node i, LIMIT, of the section llIs the active limit of section l.
Constructing a power balance constraint according to the power balance requirement:
wherein, PiFor marking power out of physical load node i, LbidldAnd the bid power is marked for the marketized load bidld.
Calculating the node price of the marketized load through a safety constraint economic dispatching model:
wherein λ is the constrained Lagrangian multiplier of equation (18), and is also the shadow price of constrained equation (18), μlShadow price for constraint of equation (17), λ, μlCan be directly output by a mainstream optimization calculation program.
Wherein the content of the first and second substances,
the blocking component in the node price as the marketing load is the blocking cost of the marketing load bidld to the section l of the node where the bidld is located.
In summary, the method for determining blocking cost of marketized load of the present invention first obtains the dependency relationship between each physical load and each marketized load and each load center in the power system, and the sensitivity of each cross-section active power to each physical load in the power system, and then obtains the sensitivity of each cross-section active power to each marketized load according to the two information, and then obtains the node price of each marketized load based on the sensitivity of each cross-section active power to each marketized load and the sensitivity of each cross-section active power to each physical load, wherein the blocking component in the node price of each marketized load is the blocking cost of each marketized load, and then the blocking cost of each marketized load can be obtained without specifying the actual physical connection point of the marketized load to participate in the power market, which is helpful for solving the blocking problem of electricity selling companies and power users with lower voltage level to participate in the power market Meanwhile, according to the blocking cost of each marketized load, power generation side resources and power grid companies can be guided to invest in areas with high blocking cost, and energy is saved.
In another embodiment of the present invention, a specific power system is taken as an example to describe the blocking cost determination method for the marketable load. Specifically, the power system includes 246 generator sets, 1040 physical loads and 318 marketable loads, and 3 of the cross sections are shown in table 1. For simplicity, a load center is defined to which all physical loads and marketable loads belong, and the sensitivity of active 3 sections to active load center is shown in table 2.
TABLE 1 section name
| Serial number | Name of |
| 1 | King store 0.2 fen king 5439 line 0.2 hu store 5440 line forward change lake inlet 4Q28 line three line |
| 2 | Co-construction change, lake and 4Q31 lines, flood, 43H1 lines, flood, 43H2 lines and three lines |
| 3 | Flood front 43H1 line-flood in 43H2 line-flood tile 43H5 line three lines |
TABLE 2 sensitivity of active power of section to active power of load center
Referring to table 3, the blocking cost of the marketable load according to the present invention is used to determine the calculated electricity price of the nodes in the period of 96 hours of the marketable load and a blocking cost list.
Table 3 marketable load 96 time slot node electricity prices and blocking cost list
As can be seen from table 3, it can be seen that the blocking cost of the marketed load "huahong steel plant" was greater than 0 at periods 42 and 63 to 86; the blocking cost and the node price of the marketed load Huahong iron and steel plant are obtained by the method, the node price of the marketed load Huahong iron and steel plant is numerically equal to the electric energy price component plus the blocking cost, and the blocking cost condition of each time period can be visually seen.
Referring to fig. 2, showing the change curves of the electricity price, the electricity price component and the blocking cost of the nodes of the marketing load at 96 periods, it can be seen that, at 42 periods, 63 periods to 86 periods, the blocking cost of the marketing load "huahong steel works" is greater than 0, which indicates that at these periods, "wang shop", "0.2 fen wang 5439 line _0.2 lake shop 5440 line _ advancing change", "lake inlet 4Q28 line three-way cross section", "co-construction change", "lake inlet 4Q31 line _ flooding", flood inlet 43H1 line _ flooding, flood inlet 43H2 line three-way cross section "," flooding, flood inlet 43H1 line _ flood inlet 43H2 line _ flood tile 43H5 line three-way cross section "has blocking, and the marketing load" huahong steel works "generates blocking cost for eliminating blocking cross section blocking, and the grid configuration can be optimized according to the specific situation of blocking cost.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details of non-careless mistakes in the embodiment of the apparatus, please refer to the embodiment of the method of the present invention.
Referring to fig. 3, in yet another embodiment of the present invention, a blocking cost determination system for a marketable load is provided, which can be used for implementing the blocking cost determination method for the marketable load, and specifically, the blocking cost determination system for the marketable load includes a first obtaining module, a second obtaining module, a sensitivity determination module, and a blocking cost determination module.
The first acquisition module is used for acquiring the subordination relation between each physical load, each marketized load and each load center in the power system; the second acquisition module is used for acquiring the sensitivity of each section active power to each physical load active power in the power system; the sensitivity determining module is used for obtaining the sensitivity of each section active power to each marketized load according to each physical load, the subordination relation between each marketized load and each load center and the sensitivity of each section active power to each physical load active power; the blocking cost determination module is used for clearing the sensitivity of each section active power to each physical load and the sensitivity of each section active power to each marketized load active power to obtain the node price of each marketized load, and taking the blocking component in the node price of each marketized load as the blocking cost of each marketized load.
In yet another embodiment of the present invention, a computer device is provided that includes a processor and a memory for storing a computer program comprising program instructions, the processor for executing the program instructions stored by the computer storage medium. The Processor may be a Central Processing Unit (CPU), or may be other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable gate array (FPGA) or other Programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which is a computing core and a control core of the terminal, and is specifically adapted to load and execute one or more instructions in a computer storage medium to implement a corresponding method flow or a corresponding function; the processor of the embodiment of the invention can be used for the operation of the blocking cost determination method of the marketable load.
In yet another embodiment of the present invention, the present invention further provides a storage medium, specifically a computer-readable storage medium (Memory), which is a Memory device in a computer device and is used for storing programs and data. It is understood that the computer readable storage medium herein can include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides a storage space storing an operating system of the terminal. Also, one or more instructions, which may be one or more computer programs (including program code), are stored in the memory space and are adapted to be loaded and executed by the processor. It should be noted that the computer-readable storage medium may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory. One or more instructions stored in a computer-readable storage medium may be loaded and executed by a processor to perform the corresponding steps of the blocking cost determination method with respect to marketable loads in the above embodiments.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A method for determining blocking cost of a marketable load is characterized by comprising the following steps:
acquiring the subordination relation between each physical load and each marketized load and each load center in the power system;
acquiring the sensitivity of each section active power to each physical load active power in the power system;
obtaining the sensitivity of each section active power to each marketized load according to each physical load, the subordination relation between each marketized load and each load center and the sensitivity of each section active power to each physical load active power;
and clearing based on the sensitivity of each section active power to each physical load and the sensitivity of each section active power to each marketized load to obtain the node price of each marketized load, and taking the blocking component in the node price of each marketized load as the blocking cost of each marketized load.
2. The method for determining the blocking cost of the marketable load according to claim 1, wherein the specific method for acquiring the affiliation between each physical load and each marketable load and each load center in the power system comprises:
and obtaining the subordination relation between each physical load and each marketable load and each load center according to the physical loads and the geographical areas of each marketable load and each load center.
3. The method for determining blocking cost of a marketable load according to claim 1, wherein the specific method for obtaining the sensitivity of each cross section active power to each physical load active power in the power system comprises:
acquiring susceptance of each line in a power system; and obtaining the sensitivity of each section active power to each physical load active power in the power system based on a direct current power flow algorithm according to the susceptance of each line in the power system.
4. The method for determining blocking cost of marketable loads according to claim 1, wherein the specific method for obtaining the sensitivity of each section active power to each marketable load active power according to each physical load, the subordination relationship between each marketable load and each load center, and the sensitivity of each section active power to each physical load active power comprises:
acquiring a load distribution coefficient of each physical load in a subordinate load center based on each physical load and the subordinate relation with each load center;
according to the load distribution coefficient of each physical load in the subordinate load center and the sensitivity of each section active power to each physical load active power, obtaining the sensitivity of each section active power to each load center;
and obtaining the sensitivity of each section to the active work of each marketable load according to the sensitivity of each section to the active work of each load center and the subordination relation between each marketable load and each load center.
5. The method for determining the blocking cost of the marketable load according to claim 4, wherein the specific method for obtaining the load distribution coefficient of each physical load in the subordinate load center is as follows:
acquiring each physical load and a load value of each load center;
the proportion of the load value of each physical load to the load value of the subordinate load center is taken as a load distribution coefficient.
6. The method for determining blocking cost of marketable load according to claim 4, wherein the specific method for obtaining the sensitivity of each cross section to each load center is as follows:
traversing each physical load, and multiplying the active sensitivity of each section to the current physical load by the load distribution coefficient of the current physical load in the subordinate load center to obtain each section component of each physical load;
and traversing each load center, and correspondingly overlapping each section component of all the physical loads subordinate to the current load center according to the sections to obtain the sensitivity of each section to the success of each load center.
7. The method for determining blocking cost of marketable loads according to claim 4, wherein the specific method for obtaining the sensitivity of each cross section with work to each marketable load comprises:
the sensitivity of each cross section to the success of each load center is defined as the sensitivity of each cross section to the success of each marketable load subordinate to each load center.
8. A system for determining blocking costs of a marketable load, comprising:
the first acquisition module is used for acquiring the subordination relation between each physical load and each marketized load and each load center in the power system;
the second acquisition module is used for acquiring the sensitivity of each section active power to each physical load active power in the power system;
the sensitivity determining module is used for obtaining the sensitivity of each section active power to each marketized load according to each physical load, the subordination relation between each marketized load and each load center and the sensitivity of each section active power to each physical load active power;
and the blocking cost determining module is used for clearing the sensitivity of each section active power to each physical load and the sensitivity of each section active power to each marketized load active power to obtain the node price of each marketized load, and taking the blocking component in the node price of each marketized load as the blocking cost of each marketized load.
9. A computer device comprising a memory, a processor and a computer program stored in said memory and executable on said processor, characterized in that said processor when executing said computer program realizes the steps of the blocking cost determination method of marketable loads according to any one of claims 1 to 7.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method for determining a blocking cost of a marketable load according to any one of claims 1 to 7.
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| CN107221929A (en) * | 2017-05-27 | 2017-09-29 | 上海电力学院 | Energy efficiency power plant based on market interest is distributed rationally and power plants and grid coordination planing method |
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