CN115441448B

CN115441448B - Power conversion and supply verification method, device and equipment for power distribution network line and storage medium

Info

Publication number: CN115441448B
Application number: CN202211401582.5A
Authority: CN
Inventors: 李鹏; 黄文琦; 梁凌宇; 赵翔宇; 戴珍; 侯佳萱; 曹尚; 白昱阳
Original assignee: Southern Power Grid Digital Grid Research Institute Co Ltd
Current assignee: Southern Power Grid Digital Grid Research Institute Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-03-24
Anticipated expiration: 2042-11-08
Also published as: CN115441448A

Abstract

The application discloses a power transfer and supply verification method, device and equipment for a power distribution network line and a storage medium, relates to the technical field of power distribution networks, and can improve the efficiency of power transfer and supply verification of the power distribution network line. The method comprises the following steps: acquiring topological data of a line topological structure of an area to be checked; the topology data at least comprises node connection data of each branch line, a parameter value of a first power grid parameter of each branch line, a node attribute of each line node and a parameter value of a second power grid parameter of each line node in X main line lines; determining X transformer substation outlet feeder lines from each branch line based on the node connection data of each branch line and the node attribute of each line node; and performing power transfer and supply verification on the X transformer substation outlet feeders based on the topological data, and determining a power transfer and supply verification result of the area to be verified according to the power transfer and supply verification result of the X transformer substation outlet feeders.

Description

Power conversion and supply verification method, device and equipment for power distribution network line and storage medium

Technical Field

The application relates to the technical field of power distribution networks, in particular to a power transfer and supply verification method, device and equipment of a power distribution network line and a storage medium.

Background

The grid structure of the power distribution network line is the key for planning and modifying the power distribution network at present, and the power transfer capacity (which means the capacity of transferring load of the power grid when a power grid element or a transformer substation and the like in a certain power supply area fails) can accurately evaluate the margin and toughness of the grid structure.

Currently, when the power transfer capability of a certain power supply area in a power distribution network line needs to be verified, a typical wiring mode (for example, wiring modes such as two-supply one-standby, single-ring network, N-segment M-contact and the like) can be extracted from a topological structure of the power supply area, and then the power transfer capability of each line and a main transformer in the power supply area is verified one by one based on an "N-1" verification principle (single failure safety inspection rule).

However, the grid structure of the power distribution network is very complex, and the wiring modes are numerous, so that the efficiency of the conventional method for verifying the power transfer capability of the power distribution network is extremely low. Therefore, how to improve the efficiency of power transfer verification on the power distribution network becomes a technical problem to be solved urgently.

Disclosure of Invention

The application provides a power transfer and supply verification method, device and equipment for a power distribution network line and a storage medium, which can improve the efficiency of power transfer and supply verification of the power distribution network line.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, the present application provides a method for verifying a transfer power supply of a power distribution network line, including: acquiring topological data of a line topological structure of an area to be checked; the line topological structure is a topological structure of X trunk lines of an area to be checked, one trunk line is composed of at least one branch line, and one branch line is formed by connecting two line nodes; the topology data at least comprises node connection data of each branch line, a parameter value of a first power grid parameter of each branch line, a node attribute of each line node and a parameter value of a second power grid parameter of each line node in X main line lines; wherein X is a positive integer; determining X transformer substation outlet feeder lines from each branch line based on the node connection data of each branch line and the node attribute of each line node; and performing power transfer and supply verification on the X transformer substation outlet feeders based on the topological data, and determining a power transfer and supply verification result of the area to be verified according to the power transfer and supply verification result of the X transformer substation outlet feeders.

According to the technical scheme, when power conversion and verification are required to be carried out on the area to be verified, topological data of a line topological structure of the area to be verified can be obtained firstly, wherein the topological data at least comprise X trunk lines of the area to be verified, node connection data of each branch line, parameter values of first power grid parameters of each branch line, node attributes of each line node and parameter values of second power grid parameters of each line node. The node connection data of each branch line can represent the connection relation between each line node in the area to be checked, and the node attribute of each line node can represent whether the line node is a power supply node (or a substation node). After the topological data are obtained, the method and the device can determine the X transformer substation outlet feeder lines of the X trunk lines from the branch lines according to the node connection data of the branch lines and the node attributes of the line nodes. In a distribution network line, a fault occurring at an outlet feeder line section (i.e., a substation outlet feeder line in the present application) where an outlet circuit breaker of a substation is located is generally the most serious fault, so that the power transfer verification result of the X substation outlet feeder lines can represent the power transfer verification result of the area to be verified. Therefore, the power transfer verification can be performed on the X transformer substation outlet feeders, and the power transfer verification result of the area to be verified is determined according to the power transfer verification result of the X transformer substation outlet feeders. It can be seen that when the power supply verification is carried out on the to-be-verified area in the power distribution network line, the branch lines in the to-be-verified area are not subjected to the power supply verification one by one, but X transformer substation outlet feeders in the to-be-verified area are selected to carry out the power supply verification, and therefore the efficiency of the power supply verification can be improved.

Optionally, in a possible design manner, the "performing power transfer verification on the X substation outlet feeders based on the topology data, and determining a power transfer verification result of the area to be verified according to the power transfer verification result of the X substation outlet feeders" may include: determining a verification sequence for performing power transfer verification on the X transformer substation outlet feeder lines based on a preset rule; step A: determining a current substation outlet feeder line according to the checking sequence, and performing power transfer and supply checking on the current substation outlet feeder line based on the topological data to obtain a power transfer and supply checking result of the current substation outlet feeder line; and B: judging whether a power conversion and supply verification result of the current substation outlet feeder line passes verification; and C: under the condition that the power transfer verification result of the current substation outlet feeder line is determined to be not passed through verification, determining that the power transfer verification result of the area to be verified is not passed through verification; determining whether the current substation outlet feeder line is the last substation outlet feeder line or not under the condition that the power transfer verification result of the current substation outlet feeder line is determined to be passed through verification; step D: under the condition that the current substation outlet feeder line is determined to be the last substation outlet feeder line, determining that a power transfer verification result of the to-be-verified area is verified to be passed; and under the condition that the current substation outlet feeder line is determined not to be the last substation outlet feeder line, repeating the steps A to C until the power transfer verification result of the current substation outlet feeder line is determined to be that the verification does not pass or the current substation outlet feeder line is determined to be the last substation outlet feeder line.

Optionally, in another possible design manner, the first power grid parameter at least includes an active load capacity parameter, the second power grid parameter at least includes an active load demand parameter, and the "determining, based on a preset rule, a verification sequence for performing power transfer verification on the X substation outlet feeders" may include: respectively determining candidate nodes corresponding to the X transformer substation outlet feeder lines based on the node connection data of each branch line; respectively determining the load rate of X transformer substation outlet feeders based on the parameter values of the active load demand parameters of the candidate nodes corresponding to the X transformer substation outlet feeders and the parameter values of the active load capacity parameters of the X transformer substation outlet feeders; and determining a checking sequence according to the load rate of the X transformer substation outlet feeder lines.

Optionally, in another possible design manner, the "performing power transfer verification on X substation outlet feeders based on topology data" may include: inputting the topological data into a preset power conversion and supply mathematical model, and determining power conversion and supply verification results of X transformer substation outlet feeder lines based on the output result of the preset power conversion and supply mathematical model; the preset power conversion and supply mathematical model is a mixed integer linear programming model established based on preset constraint conditions and a preset objective function; the preset constraint condition is at least one corresponding relation established based on a preset decision ration and a preset decision variable, the preset decision ration comprises a first power grid parameter and a second power grid parameter, and the preset decision variable comprises a third power grid parameter of each branch line and a fourth power grid parameter of each line node; the preset target function is used for representing the maximum energy conversion capacity of the area to be verified under the condition that the outlet feeder line of the target transformer substation is a fault feeder line; the target substation outlet feeder line is any one of the X substation outlet feeder lines.

Optionally, in another possible design manner, the first grid parameter at least includes an active load capacity parameter, a reactive load capacity parameter, a line resistance, and a line reactance, and the second grid parameter at least includes an active load demand parameter, a reactive load demand parameter, and a voltage extreme value parameter; under the condition that the line node is a power supply node, the second power grid parameters further comprise an active output extreme value parameter and a reactive output extreme value parameter; the third power grid parameters at least comprise a first on-off variable, a first direction variable, a second direction variable, active power and reactive power; the fourth grid parameters at least comprise a second on-off variable and a voltage parameter; under the condition that the line node is a power supply node, the fourth power grid parameter further comprises active power output and reactive power output; the first on-off variable, the first direction variable, the second direction variable and the second on-off variable are binary variables, and the active power, the reactive power, the active output, the reactive output and the voltage parameter are continuous variables.

Optionally, in another possible design manner, the preset objective function is a function related to the second on-off variable and the active load demand parameter; the preset constraint conditions at least comprise a power flow balance constraint condition, a line voltage drop constraint condition, a line power constraint condition, a main transformer power constraint condition, a node voltage constraint condition and a radial constraint condition.

Optionally, in another possible design manner, the acquiring topology data of the line topology structure of the area to be verified may include: acquiring X public information model files corresponding to X trunk lines; and analyzing the X public information model files based on a preset analysis rule to obtain topological data.

In a second aspect, the present application provides a power transfer calibration apparatus for a power distribution network, including: the device comprises an acquisition module, a determination module and a verification module; the acquisition module is used for acquiring topological data of a line topological structure of an area to be checked; the line topological structure is a topological structure of X trunk lines of an area to be checked, one trunk line is composed of at least one branch line, and one branch line is formed by connecting two line nodes; the topology data at least comprises node connection data of each branch line, a parameter value of a first power grid parameter of each branch line, a node attribute of each line node and a parameter value of a second power grid parameter of each line node in X main line lines; wherein X is a positive integer; the determining module is used for determining X transformer substation outlet feeder lines from each branch line based on the node connection data of each branch line and the node attribute of each line node; and the verification module is used for performing power transfer verification on the X transformer substation outlet feeders based on the topological data and determining a power transfer verification result of the area to be verified according to the power transfer verification result of the X transformer substation outlet feeders.

Optionally, in a possible design manner, the verification module is specifically configured to: determining a verification sequence for performing power transfer verification on the X transformer substation outlet feeders based on a preset rule; executing the step A: determining a current substation outlet feeder line according to the checking sequence, and performing power transfer and supply checking on the current substation outlet feeder line based on the topological data to obtain a power transfer and supply checking result of the current substation outlet feeder line; and B, executing the step B: judging whether a power transfer verification result of the current substation outlet feeder line passes verification; and C, executing the step C: under the condition that the power transfer verification result of the current substation outlet feeder line is determined to be not passed through verification, determining that the power transfer verification result of the area to be verified is not passed through verification; determining whether the current substation outlet feeder line is the last substation outlet feeder line or not under the condition that the power transfer verification result of the current substation outlet feeder line is determined to be passed through verification; and D, executing the step D: under the condition that the current substation outlet feeder line is determined to be the last substation outlet feeder line, determining that a power transfer verification result of the to-be-verified area is verified to be passed; and under the condition that the current substation outlet feeder line is determined not to be the last substation outlet feeder line, repeating the steps A to C until the power transfer verification result of the current substation outlet feeder line is determined to be that the verification does not pass or the current substation outlet feeder line is determined to be the last substation outlet feeder line.

Optionally, in another possible design manner, the first power grid parameter at least includes an active load capacity parameter, the second power grid parameter at least includes an active load demand parameter, and the verification module is further specifically configured to: respectively determining candidate nodes corresponding to the X transformer substation outlet feeder lines based on the node connection data of each branch line; respectively determining the load rate of X transformer substation outlet feeders based on the parameter values of the active load demand parameters of the candidate nodes corresponding to the X transformer substation outlet feeders and the parameter values of the active load capacity parameters of the X transformer substation outlet feeders; and determining a checking sequence according to the load rate of the X transformer substation outlet feeder lines.

Optionally, in another possible design manner, the verification module is further specifically configured to: inputting the topological data into a preset power conversion and supply mathematical model, and determining power conversion and supply verification results of X transformer substation outlet feeder lines based on output results of the preset power conversion and supply mathematical model; the preset power conversion and supply mathematical model is a mixed integer linear programming model established based on preset constraint conditions and a preset objective function; the preset constraint condition is at least one corresponding relation established based on a preset decision ration and a preset decision variable, the preset decision ration comprises a first power grid parameter and a second power grid parameter, and the preset decision variable comprises a third power grid parameter of each branch line and a fourth power grid parameter of each line node; the preset target function is used for representing the maximum energy conversion capacity of the area to be verified under the condition that the outlet feeder line of the target transformer substation is a fault feeder line; the target substation outlet feeder line is any one of the X substation outlet feeder lines.

Optionally, in another possible design manner, the first grid parameters at least include an active load capacity parameter, a reactive load capacity parameter, a line resistance, and a line reactance, and the second grid parameters at least include an active load demand parameter, a reactive load demand parameter, and a voltage extreme value parameter; under the condition that the line node is a power supply node, the second power grid parameters further comprise an active output extreme value parameter and a reactive output extreme value parameter; the third power grid parameters at least comprise a first on-off variable, a first direction variable, a second direction variable, active power and reactive power; the fourth grid parameters at least comprise a second on-off variable and a voltage parameter; under the condition that the line node is a power supply node, the fourth power grid parameter further comprises active power output and reactive power output; the first on-off variable, the first direction variable, the second direction variable and the second on-off variable are binary variables, and the active power, the reactive power, the active output, the reactive output and the voltage parameter are continuous variables.

Optionally, in another possible design manner, the obtaining module is specifically configured to: acquiring X public information model files corresponding to X trunk lines; and analyzing the X public information model files based on a preset analysis rule to obtain topological data.

In a third aspect, the present application provides a power transfer verification device for a power distribution network line, including a memory, a processor, a bus, and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the power transfer verification device of the power distribution network line operates, the processor executes the computer execution instructions stored in the memory, so that the power transfer verification device of the power distribution network line executes the power transfer verification method of the power distribution network line provided by the first aspect.

In a fourth aspect, the present application provides a computer-readable storage medium, where instructions are stored, and when the instructions are executed by a computer, the computer executes the method for verifying the transfer power of the distribution network line according to the first aspect.

In a fifth aspect, the present application provides a computer program product comprising computer instructions which, when run on a computer, cause the computer to perform the method for verifying the transfer power of an electrical distribution network line as provided in the first aspect.

It should be noted that all or part of the computer instructions may be stored on the computer readable storage medium. The computer-readable storage medium may be packaged with a processor of the distribution network line power transfer verification device, or may be packaged separately from a processor of the distribution network line power transfer verification device, which is not limited in this application.

For the descriptions of the second, third, fourth and fifth aspects in this application, reference may be made to the detailed description of the first aspect; in addition, for the beneficial effects described in the second aspect, the third aspect, the fourth aspect and the fifth aspect, reference may be made to beneficial effect analysis of the first aspect, and details are not repeated here.

In the present application, the names of the above-mentioned devices or functional modules are not limited, and in actual implementation, the devices or functional modules may be represented by other names. Insofar as the functions of the respective devices or functional modules are similar to those of the present application, they are within the scope of the claims of the present application and their equivalents.

These and other aspects of the present application will be more readily apparent from the following description.

Drawings

Fig. 1 is a schematic flowchart of a power transfer verification method for a power distribution network line according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a line topology structure of an area to be verified according to an embodiment of the present application;

fig. 3 is a schematic flowchart of a method for obtaining topology data of a line topology structure of an area to be checked according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a power transfer verification apparatus for a power distribution network line according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a power transfer verification device of a power distribution network line according to an embodiment of the present application.

Detailed Description

The method, the apparatus, the device, and the storage medium for verifying the transfer power of the power distribution network line provided by the embodiment of the present application are described in detail below with reference to the accompanying drawings.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The terms "first" and "second" and the like in the description and drawings of the present application are used for distinguishing different objects or for distinguishing different processes for the same object, and are not used for describing a specific order of the objects.

Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the present application, the meaning of "a plurality" means two or more unless otherwise specified.

In addition, the technical scheme of the application conforms to relevant regulations of national laws and regulations in terms of data acquisition, storage, use, processing and the like.

In order to solve the problems in the prior art, the embodiment of the application provides a power transfer and supply verification method for a power distribution network line, when power transfer and supply verification is performed on an area to be verified in the power distribution network line, branch lines in the area to be verified are not subjected to power transfer and supply verification one by one, but X transformer substation outlet feeders in the area to be verified are selected to be subjected to power transfer and supply verification, so that the efficiency of power transfer and supply verification on the power distribution network line can be improved.

The power transfer verification method of the power distribution network line provided by the embodiment of the application can be executed by the power transfer verification device of the power distribution network line provided by the embodiment of the application, the device can be realized in a software and/or hardware mode, and the device is integrated in power transfer verification equipment of the power distribution network line executing the method. The method for verifying the power transfer of the power distribution network line provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the method for verifying the power transfer of the power distribution network line provided in the embodiment of the present application may include steps S101 to S103:

s101, obtaining topological data of a line topological structure of an area to be checked.

The to-be-verified area can be any area of the power distribution network lines, which needs to be verified by a user, the line topological structure is the topological structure of X trunk lines of the to-be-verified area, one trunk line is composed of at least one branch line, and one branch line is formed by connecting two line nodes; x is a positive integer.

By way of example, with reference to fig. 2, a schematic diagram of a possible structure of the line topology of the area to be verified is provided. As shown in fig. 2, the area to be verified includes 4 trunk lines, which are a line between line node 37 and line node 11 (hereinafter, referred to as trunk line a), a line between line node 38 and line node 15 (hereinafter, referred to as trunk line B), a line between line node 39 and line node 25, and a line between line node 40 and line node 36. Each trunk line includes a plurality of branch lines, each branch line is formed by connecting two line nodes, for example, a branch line in the trunk line B includes: a line in which line node 38 and line node 12 are connected, a line in which line node 12 and line node 13 are connected, a line in which line node 12 and line node 14 are connected, and a line in which line node 14 and line node 15 are connected.

It is understood that in practical applications, there may be a connection relationship between the trunk lines. For example, line node 11 in trunk line a in fig. 2 is connected to line node 15 in trunk line B, i.e. two separate trunk lines are connected.

The topology data at least comprises node connection data of each branch line, a parameter value of a first power grid parameter of each branch line, a node attribute of each line node and a parameter value of a second power grid parameter of each line node in X main lines.

The node connection data can represent the connection relation between each line node in the area to be checked. For example, the node connection data may include node identifications of two line nodes connecting the branch line, and may also include node identifications of neighboring nodes of the two line nodes of the branch line. The node properties may characterize the element properties of the corresponding line elements of the node in the actual distribution network line, e.g. the node properties may be a power source node (or substation node) or a non-power source node. The first power grid parameter may be an electrical parameter such as a line resistance and a line reactance of a branch line, and the second power grid parameter may be an electrical parameter such as an active load demand parameter and a reactive load demand parameter of a line node.

Optionally, in the embodiment of the present application, the topology data of the line topology structure of the area to be checked may be obtained by the following method: acquiring X Common Information Model (CIM) files corresponding to X trunk lines; and analyzing the X CIM files based on a preset analysis rule to obtain topology data.

Wherein, the CIM file may be a file stored in advance in the CIM file set. In the embodiment of the application, CIM files of different trunk lines can be stored in the CIM file set in advance, and when the power transfer verification needs to be performed on the area to be verified, X CIM files corresponding to X trunk lines of the area to be verified can be searched in the CIM file set.

The preset parsing rule may be a predetermined parsing rule. For example, in this embodiment of the present application, a CIM file corresponding to one backbone line may include an eXtensible Markup Language (XML) file. In the XML file, each line component included in the trunk line, electrical parameters of each line component, connection relationships between each line component, electrical parameters of a wire formed by connecting each line component, and the like are recorded in a structured format such as a table. Then, the preset parsing rule may be that, for each CIM file in the X CIM files, each line element recorded in the XML file may be converted into a line node, a connection relationship between each line element is converted into a branch line composed of two line nodes, an electrical parameter of each line element is converted into a second power grid parameter, and an electrical parameter of a wire formed by connecting each line element is converted into a first power grid parameter. In addition, line elements connected with other trunk lines in the trunk line are also recorded in the XML file, and the data converted by the X XML files can be integrated on the basis of the line elements to obtain topological data of a line topological structure of the area to be verified.

In order to avoid that errors occur in the analysis process and affect the subsequent verification process, in the embodiment of the present application, the CIM file corresponding to one trunk line may further include a Scalable Vector Graphics (SVG) file, and each line element, electrical parameters of each line element, connection relationships between each line element, electrical parameters of a wire formed by connecting each line element, and the like included in the trunk line are recorded in the SVG file in a graphic format. The topological data of the line topological structure of the area to be checked can be obtained based on a similar mode of analyzing the XML file. And then, comparing the topology data respectively analyzed based on the XML file and the SVG file, if the data are consistent, using the analyzed topology data as the topology data of the circuit topology structure of the area to be verified, and performing the subsequent verification process according to the topology data. And if the compared data are inconsistent, analyzing the XML file and the SVG file again.

In the prior art, when power transfer verification is performed, data of different trunk lines are stored in different data systems, and a large amount of time is needed when data of each trunk line is manually integrated. In the embodiment of the application, the data of each trunk line can be stored in a CIM file set as a CIM file, and when the data of each trunk line needs to be integrated, the topology data required by the power transfer verification can be acquired only by analyzing the CIM file corresponding to each trunk line according to a preset analysis rule. Therefore, the data in the CIM file can be applied to the power transfer verification process, the topological data of the area to be verified do not need to be determined manually, and the power transfer verification efficiency of the power distribution network line can be further improved.

And S102, determining X transformer substation outlet feeder lines from the branch lines based on the node connection data of the branch lines and the node attributes of the line nodes.

The substation outlet feeder is an outlet feeder section where an outlet breaker of the substation is located. For example, as shown in fig. 2, the line node 37, the line node 38, the line node 39 and the line node 40 are all power supply nodes (or substation nodes), and a line formed by connecting the line node 37 and the line node 1, a line formed by connecting the line node 38 and the line node 12, a line formed by connecting the line node 39 and the line node 16, and a line formed by connecting the line node 40 and the line node 26 may be determined as 4 substation outlet feeders of the area to be verified.

S103, performing power transfer verification on the X transformer substation outlet feeders based on the topological data, and determining a power transfer verification result of the area to be verified according to the power transfer verification result of the X transformer substation outlet feeders.

In the embodiment of the application, X transformer substation outlet feeders are selected to perform power transfer and supply verification, so that the verification efficiency can be greatly improved, and the method is suitable for the verification scene of the power distribution network lines with complex grid structure and numerous wiring modes.

Optionally, in the embodiment of the present application, the power transfer verification result of the area to be verified may be determined in the following manner: determining a verification sequence for performing power transfer verification on the X transformer substation outlet feeders based on a preset rule; step A: determining a current substation outlet feeder line according to the checking sequence, and performing power transfer and supply checking on the current substation outlet feeder line based on the topological data to obtain a power transfer and supply checking result of the current substation outlet feeder line; and B: judging whether a power conversion and supply verification result of the current substation outlet feeder line passes verification; step C: under the condition that the power transfer verification result of the current substation outlet feeder line is determined to be not passed through verification, determining that the power transfer verification result of the area to be verified is not passed through verification; determining whether the current substation outlet feeder line is the last substation outlet feeder line or not under the condition that the power transfer verification result of the current substation outlet feeder line is determined to be passed through verification; step D: under the condition that the current substation outlet feeder line is determined to be the last substation outlet feeder line, determining that a power transfer verification result of the to-be-verified area is verified to be passed; and under the condition that the current substation outlet feeder line is determined not to be the last substation outlet feeder line, repeating the steps A to C until the power transfer verification result of the current substation outlet feeder line is determined to be that the verification does not pass or the current substation outlet feeder line is determined to be the last substation outlet feeder line.

When the power transfer verification result of the current substation outlet feeder line is that the verification is passed, namely the current substation outlet feeder line is set as a fault feeder line section, the load of each line node in the region to be verified can be successfully transferred; on the contrary, when the power transfer verification result of the current substation outlet feeder line is that the verification fails, that is, when the current substation outlet feeder line is set as a fault feeder line section, the load of at least one line node in the area to be verified cannot be successfully transferred.

The preset rule may be a rule that is determined in advance to generate the verification order. For example, in a possible implementation manner, the preset rule may be that a check sequence is generated according to a numbering sequence of X trunk lines corresponding to X substation outlet feeders, or the preset rule may also be that the check sequence is randomly generated based on the numbering sequence.

In a distribution network line, faults occurring at the substation outlet feeders are generally the most severe faults. Therefore, in the embodiment of the application, the power supply conversion verification can be performed by sequentially using the X substation outlet feeders as fault feeder sections on the basis of an 'N-1' verification principle. If the X transformer substation outlet feeder lines can pass the 'N-1' verification, namely, the power transfer verification results pass the verification, the power transfer verification result of the area to be verified can be determined to be passed. If at least one substation outlet feeder line in the X substation outlet feeder lines fails to pass the 'N-1' verification, the power transfer verification result of the area to be verified can be determined to be that the verification fails. Based on the verification principle, in the process of sequentially verifying the X transformer substation outlet feeders according to the verification sequence, as long as the power transfer verification result of the current transformer substation outlet feeder does not pass the verification, the verification process can be immediately stopped, so that unnecessary redundancy analysis can be reduced, and the verification efficiency is further improved.

Optionally, in this embodiment of the application, the first power grid parameter at least includes an active load capacity parameter, and the second power grid parameter at least includes an active load demand parameter; determining a verification sequence for performing power transfer verification on the X substation outlet feeders based on a preset rule may include: respectively determining candidate nodes corresponding to the X transformer substation outlet feeder lines based on the node connection data of each branch line; respectively determining the load rate of X transformer substation outlet feeders based on the parameter values of the active load demand parameters of the candidate nodes corresponding to the X transformer substation outlet feeders and the parameter values of the active load capacity parameters of the X transformer substation outlet feeders; and determining a checking sequence according to the load rate of the X transformer substation outlet feeder lines.

The active load capacity parameter can represent the maximum value of the active load which can be accommodated by the branch line, and the active load demand parameter can represent the active load required by the line node.

Illustratively, as shown in fig. 2, the line formed by connecting the line node 38 and the line node 12 is a substation outlet feeder, and the candidate node corresponding to the substation outlet feeder may include all load nodes below the substation outlet feeder, such as the

line nodes

38, 12, 13, 14, and 15. Then, the parameter values of the active load demand parameters of the several line nodes may be accumulated, and then the accumulated value is divided by the parameter value of the active load capacity parameter of the substation outlet feeder line, so that the load factor of the substation outlet feeder line may be obtained.

The transformer substation outlet feeder line with higher load rate has lower probability of success in switching supply compared with the transformer substation outlet feeder line with lower load rate. Therefore, the power transfer verification can be performed from the substation outlet feeder line with the high load rate to the substation outlet feeder line with the low load rate according to the sequencing of the load rates, so that the redundancy analysis can be further reduced, and the verification efficiency can be further improved.

Optionally, performing power transfer verification on the X substation outlet feeders based on the topology data may include: and inputting the topological data into a preset power transfer mathematical model, and determining power transfer verification results of X transformer substation outlet feeders based on output results of the preset power transfer mathematical model.

The preset power conversion mathematical model is a Mixed Integer Linear Programming (MILP) model established based on preset constraint conditions and a preset objective function; the preset constraint condition is at least one corresponding relation established based on the preset decision quantification and the preset decision variable. The preset decision quantification comprises a first power grid parameter and a second power grid parameter, the preset decision variables comprise a third power grid parameter of each branch line and a fourth power grid parameter of each line node, and the third power grid parameter and the fourth power grid parameter can be predetermined electrical parameters in some power distribution network lines. The preset target function is used for representing the maximum energy conversion capacity of the area to be verified under the condition that the outlet feeder line of the target transformer substation is a fault feeder line; the target substation outlet feeder line is any one of the X substation outlet feeder lines.

Although the existing preset power conversion and supply mathematical model constructed based on the 'N-1' verification principle can also obtain a power conversion and supply verification result according to topological data, the existing model has high calculation complexity and difficult guarantee of optimality of an output solution, so that the verification accuracy rate is not high. In the embodiment of the application, the MILP model for verifying the single substation outlet feeder line is constructed based on the preset constraint condition and the preset objective function, the verification process of the area to be verified is split into the process of sequentially verifying the X substation outlet feeder lines by the MILP model, the calculation complexity is low, and therefore the verification accuracy can be improved.

Optionally, the first grid parameters at least include an active load capacity parameter, a reactive load capacity parameter, a line resistance and a line reactance, and the second grid parameters at least include an active load demand parameter, a reactive load demand parameter and a voltage extreme value parameter; under the condition that the line node is a power supply node, the second power grid parameters further comprise an active output extreme value parameter and a reactive output extreme value parameter; the third power grid parameters at least comprise a first on-off variable, a first direction variable, a second direction variable, active power and reactive power; the fourth grid parameters at least comprise a second on-off variable and a voltage parameter; under the condition that the line node is a power supply node, the fourth power grid parameter further comprises active power output and reactive power output; the first on-off variable, the first direction variable, the second direction variable and the second on-off variable are binary variables, and the active power, the reactive power, the active output, the reactive output and the voltage parameter are continuous variables.

The reactive load capacity parameter can represent the maximum value of reactive load which can be accommodated by the branch line, and the reactive load demand parameter can represent the reactive load required by the line node. The active output extreme parameter can represent the maximum value of active power which can be sent by the power supply node, and the reactive output extreme parameter can represent the maximum value of reactive power which can be sent by the power supply node. The first on-off variable is used for representing whether the branch line is put into operation or not, when the first on-off variable is 1, the branch line is shown to be put into operation, and when the first on-off variable is 0, the branch line is shown to be not put into operation. And the second disconnection variable is used for representing whether the line node is put into operation or not, and when the second disconnection variable is 1, the line node is shown to be put into operation, and when the second disconnection variable is 0, the line node is shown to be not put into operation.

The same branch line has two direction variables, including a first direction variable and a second direction variable. Taking a line formed by connecting line node 37 and line node 1 as an example, when line node 37 is the head node and line node 1 is the tail node, the first direction variable represents the line direction from line node 37 to line node 1; when line node 37 is the last node and line node 1 is the first node, the second direction variable represents the direction of the line from line node 1 to line node 37. The first direction variable and the second direction variable represent the make and break of two line directions. In addition, the active power may also include active power flowing into the head node (or flowing out of the end node) and active power flowing out of the head node (or flowing into the end node), and the reactive power may also include reactive power flowing into the head node and reactive power flowing out of the head node, based on different direction variables. Active output can represent the active power emitted by the power supply node, and reactive output can represent the reactive power emitted by the power supply node.

In order to avoid that the solving efficiency of the model is reduced due to the fact that a nonlinear term appears in a preset decision variable in the model when a preset power conversion mathematical model is constructed, in the embodiment of the application, the voltage parameter can be a square value of the voltage of the line node, and correspondingly, the voltage extreme value parameter can be a square of a rated voltage of the line node.

Optionally, the preset objective function may be a function related to the second on-off variable and the active load demand parameter; the preset constraint conditions at least comprise a power flow balance constraint condition, a line voltage drop constraint condition, a line power constraint condition, a main transformer power constraint condition, a node voltage constraint condition and a radial constraint condition.

Illustratively, the preset objective function may be represented by expression (1):

（1）

wherein i represents any line node in the line topology structure of the area to be checked, the value range of i is 1 to y, and y is the total number of the line nodes in the line topology structure of the area to be checked;

a second on-off variable may be represented,

representing an active load demand parameter.

In one possible implementation, the power flow balance constraint may be: for any one of the power supply nodes i, the active power flowing into the branch line ji of the power supply node i

Active power output of power supply node i

Active power of branch line ij flowing out of power supply node i

Second on/off variable of power supply node i

And the active load demand parameter of the power supply node i

Satisfy the third preset corresponding relation and flow into the reactive power of the branch line ji of the power node i

Reactive power output of power supply node i

Reactive power of branch line ij flowing out of power supply node i

Second on/off variable of power supply node i

And reactive load demand parameters of power node i

And the fourth preset corresponding relation is met. For any one non-power supply node i in each line node, the active power flowing into the branch line ji of the non-power supply node i

Active power of branch line ij flowing out of non-power supply node i

Second on/off variable of non-power node i

And the active load demand parameter of the non-power supply node i

The reactive power of the branch line ji which meets the fifth preset corresponding relation and flows into the non-power source node iPower of

Reactive power of branch line ij flowing out of non-power supply node i

Second on/off variable of non-power supply node i

And reactive load demand parameters of non-power source node i

And the sixth preset corresponding relation is met.

Wherein the third predetermined corresponding relationship is also the active power

And active power output

Need and active power

And the active load demand parameter of the power supply node i after the power supply operation

Satisfying the power balance, can be expressed by expression (2); the fourth predetermined correspondence is also the reactive power

And reactive power

Required and reactive power

And the reactive load demand parameter of the power supply node i after the power supply operation

Satisfying the power balance, can be expressed by expression (3); the fifth predetermined correspondence is also the active power

Need and active power

And the active load demand parameter of the non-power supply node i after the power supply operation is switched

Satisfying the power balance, can be expressed by expression (4); the sixth predetermined correspondence is also the reactive power

Required and reactive power

And the reactive load demand parameter of the non-power supply node i after the power supply switching operation

Satisfying the power balance, can be expressed by expression (5):

，

（2）

，

（3）

，

（4）

，

（5）

a set of power supply nodes in a line topology representing an area to be verified,

a set of nodes representing each line node in the line topology of the area to be checked,

and representing a non-power supply node set in the line topology structure of the area to be checked.

In one possible implementation, the line voltage drop constraint may be: for any one of the branch lines L, a first on-off variable of the branch line L

Voltage parameter of head node i of branch line L

Voltage parameter of end node j of branch line L

Parameter value of line resistance of branch line L

Active power of branch line L

Parameter value of line reactance of branch line L

And reactive power of branch line L

A seventh preset corresponding relation is satisfied; the seventh preset correspondence may be expressed by expression (6):

，

（6）

wherein the content of the first and second substances,

and M represents a non-zero arbitrary number. If the branch line L is put into operation after the power supply operation is switched, then

=1, the voltage drop constraint needs to be satisfied at this time:

=0; if the branch line L is not put into operation after the power supply operation is switched on, then

=0, the constraint is relaxed by the action of M, i.e. between line node i and line node jNeed not satisfy the voltage drop constraint.

In one possible implementation, the line power constraint may be: for any one of the branch lines L, a first on-off variable of the branch line L

Active power of branch line L

And the parameter value of the active load capacity parameter of the branch line L

Satisfy the eighth preset corresponding relationship and the first on-off variable of the branch line L

Reactive power of branch line L

And reactive load capacity parameter of branch line L

And the ninth preset corresponding relation is met. The eighth preset correspondence may be represented by expression (7), and the ninth preset correspondence may be represented by expression (8):

（7）

（8）

if the branch line L is put into operation after the power supply operation is switched, then

=1, at this time, the branch line L needs to satisfy active power constraint and reactive power constraint; if the branch line L is not put into operation, then

=0, i.e. is

=0，

=0。

In one possible implementation, the main transformer power constraint may be: for any power supply node i in each line node, the second on-off variable of the power supply node i

Active power output of power supply node i

And the parameter value of the active output extreme value parameter of the power supply node i

Meets the tenth preset corresponding relation and the second on-off variable of the power supply node i

Reactive power output of power supply node i

And parameter value of reactive power output extreme value parameter of power supply node i

The eleventh preset correspondence is satisfied. The tenth preset correspondence may be represented by expression (9), and the eleventh preset correspondence may be represented by expression (10):

（9）

（10）

if the power supply node i is put into operation after power supply operation is carried out, then

=1, the absolute value of the active power from power node i needs to be less than

The absolute value of the reactive power delivered by the power supply node i needs to be less than

(ii) a If power supply node i is not put into operation, then

=0，

=0，

=0。

In one possible implementation, the node voltage constraint may be: for any one of the line nodes i, the voltage parameter

The parameter value of the voltage extreme value parameter can include the maximum value of the voltage extreme value parameter

And minimum value of extreme voltage parameter

The first preset correspondence may be represented by expression (11);

（11）

wherein, the first and the second end of the pipe are connected with each other,

、

and

both are the square of the voltage value.

In one possible implementation, the radial constraint may be: for any branch line L in each branch line, a first on-off variable

First direction variable

And a second direction variable

Satisfying a second preset corresponding relationship, which can be expressed by expression (12); moreover, the last node j of each branch line has at most one parent node (i.e. upstream node), or the power of each last node j can be injected by only one branch line, that is to say, the power is injected by one branch line

Satisfying expression (13); in addition, any power supply node i in each line node has no parent node, or the power supply node can not inject power from other lines, that is to say, the power supply node i does not have a parent node

Satisfies expression (14):

（12）

（13）

（14）

in the embodiment of the application, each branch line is decomposed into first direction variables

And a second direction variable

，

The power is represented to flow from the node i to the node j, so that the problem that each node is difficult to number according to the direction of the power flow when a CIM file is analyzed can be solved.

Specifically, after a preset power transfer mathematical model is constructed based on preset constraint conditions and a preset objective function, topological data can be input into the preset power transfer mathematical model, then, X transformer substation outlet feeders are sequentially used as fault feeder segments, and a power transfer verification result is determined according to an output result of the preset power transfer mathematical model.

For example, an open source solver may be called to solve the preset power supply conversion mathematical model in the embodiments of the present application. The process of solving the preset power supply conversion mathematical model by the specific open source solver can refer to the related description in the prior art, and the embodiment of the present application is not described herein again.

Taking the current substation outlet feeder line as the fault feeder line segment for the verification of the power transfer and supply, if the preset power transfer and supply mathematical model has a solution and has no load loss, that is, the load on each line node can be transferred (namely, the load in the solution of the objective function)

Both are 1), determining that the power transfer and supply verification result of the current substation outlet feeder line is passed; if the preset power conversion mathematical model has a solution, but there is a load loss, that is, there is a part of the load on the line node that can not be converted (that is, there is a solution of the objective function

= 0), it may be determined that the power transfer verification result of the current substation outlet feeder line does not pass the verification, and at this time, an optimal power transfer strategy may be recommended to the user according to a solution of a target function output by the preset power transfer mathematical model; if the preset power transfer mathematical model has no solution, the power transfer verification result of the current substation outlet feeder line can be determined to be that the verification fails.

In summary, in the power transfer verification method for the power distribution network line provided in the embodiment of the present application, when the power transfer verification needs to be performed on the area to be verified, the topological data of the line topological structure of the area to be verified may be obtained first, where the topological data at least includes, in the X trunk lines of the area to be verified, node connection data of each branch line, a parameter value of a first power grid parameter of each branch line, a node attribute of each line node, and a parameter value of a second power grid parameter of each line node. The node connection data of each branch line can represent the connection relation between each line node in the area to be checked, and the node attribute of each line node can represent whether the line node is a power supply node (or a substation node). After the topology data is obtained, according to the node connection data of each branch line and the node attribute of each line node, X substation outlet feeders of X trunk lines can be determined from each branch line. In a distribution network line, a fault occurring at an outlet feeder line section (i.e., a substation outlet feeder line in the present application) where an outlet circuit breaker of a substation is located is generally the most serious fault, so that the power transfer verification result of the X substation outlet feeder lines can represent the power transfer verification result of the area to be verified. Therefore, the embodiment of the application can select to perform power transfer verification on the X transformer substation outlet feeders, and determine the power transfer verification result of the area to be verified according to the power transfer verification result of the X transformer substation outlet feeders. It can be seen that when the power conversion and supply verification is performed on the to-be-verified area in the power distribution network line, the power conversion and supply verification is not performed on each branch line in the to-be-verified area one by one, but the power conversion and supply verification is performed on the X transformer substation outlet feeders in the to-be-verified area, so that the efficiency of the power conversion and supply verification performed on the power distribution network line can be improved.

Optionally, as shown in fig. 3, an embodiment of the present application further provides a method for obtaining topology data of a line topology of an area to be checked, including S301 to S305:

s301, searching X CIM files corresponding to X trunk lines of the area to be checked in the CIM file set.

Wherein, the X CIM files comprise X XML files and X SVG files.

S302, for each XML file and each SVG file, converting each line element recorded in the file into a line node, converting the connection relation between each line element into a branch line consisting of a first node and a last node, converting the electrical parameter of each line element into a second power grid parameter, and converting the electrical parameter of a wire formed by connecting each line element into a first power grid parameter.

S303, integrating the data converted by the X XML files based on the connection relation of the trunk lines recorded by the X XML files to obtain first topological data; and integrating the data converted by the X SVG files based on the connection relation of the trunk line recorded by the X SVG files to obtain second topological data.

S304, comparing the first topological data with the second topological data, and determining whether the first topological data is consistent with the second topological data.

S305, under the condition that the first topological data and the second topological data are determined to be consistent, the first topological data or the second topological data are determined to be topological data of a circuit topological structure of the area to be checked.

As shown in fig. 4, an embodiment of the present application further provides a device for verifying a transfer power of a distribution network line, where the device may include: an acquisition module 11, a determination module 21 and a verification module 31.

The obtaining module 11 executes S101 in the above method embodiment, the determining module 21 executes S102 in the above method embodiment, and the verifying module 31 executes S103 in the above method embodiment.

Specifically, the obtaining module 11 is configured to obtain topology data of a line topology structure of an area to be checked; the line topological structure is a topological structure of X trunk lines of an area to be checked, one trunk line is composed of at least one branch line, and one branch line is formed by connecting two line nodes; the topology data at least comprises node connection data of each branch line, a parameter value of a first power grid parameter of each branch line, a node attribute of each line node and a parameter value of a second power grid parameter of each line node in X main line lines; wherein X is a positive integer;

the determining module 21 is configured to determine, based on the node connection data of each branch line and the node attribute of each line node, X substation outlet feeder lines from each branch line;

and the verification module 31 is configured to perform power transfer verification on the X substation outlet feeders based on the topology data, and determine a power transfer verification result of the area to be verified according to the power transfer verification result of the X substation outlet feeders.

Optionally, in a possible design, the checking module 31 is specifically configured to:

determining a verification sequence for performing power transfer verification on the X transformer substation outlet feeders based on a preset rule; and B, executing the step A: determining a current substation outlet feeder line according to the checking sequence, and performing power transfer and supply checking on the current substation outlet feeder line based on the topological data to obtain a power transfer and supply checking result of the current substation outlet feeder line; and B, executing the step B: judging whether a power conversion and supply verification result of the current substation outlet feeder line passes verification; and C, executing the step C: under the condition that the power transfer verification result of the current substation outlet feeder line is determined to be not passed through verification, determining that the power transfer verification result of the to-be-verified area is not passed through verification; determining whether the current substation outlet feeder line is the last substation outlet feeder line or not under the condition that the power transfer verification result of the current substation outlet feeder line is determined to be passed through verification; and D, executing the step D: under the condition that the current substation outlet feeder line is determined to be the last substation outlet feeder line, determining that a power transfer verification result of the to-be-verified area is verified to be passed; and under the condition that the current substation outlet feeder line is determined not to be the last substation outlet feeder line, repeating the steps A to C until the power transfer verification result of the current substation outlet feeder line is determined to be not passed or the current substation outlet feeder line is determined to be the last substation outlet feeder line.

Optionally, in another possible design manner, the first grid parameter at least includes an active load capacity parameter, the second grid parameter at least includes an active load demand parameter, and the checking module 31 is further specifically configured to:

respectively determining candidate nodes corresponding to the X transformer substation outlet feeder lines based on the node connection data of each branch line; respectively determining the load rate of X transformer substation outlet feeders based on the parameter values of the active load demand parameters of the candidate nodes corresponding to the X transformer substation outlet feeders and the parameter values of the active load capacity parameters of the X transformer substation outlet feeders; and determining a checking sequence according to the load rate of the X transformer substation outlet feeder lines.

Optionally, in another possible design, the verification module 31 is further specifically configured to:

inputting the topological data into a preset power conversion and supply mathematical model, and determining power conversion and supply verification results of X transformer substation outlet feeder lines based on output results of the preset power conversion and supply mathematical model; the preset power conversion and supply mathematical model is a mixed integer linear programming model established based on preset constraint conditions and a preset objective function; the preset constraint condition is at least one corresponding relation established based on a preset decision ration and a preset decision variable, the preset decision ration comprises a first power grid parameter and a second power grid parameter, and the preset decision variable comprises a third power grid parameter of each branch line and a fourth power grid parameter of each line node; the preset target function is used for representing the maximum energy conversion capacity of the area to be verified under the condition that the outlet feeder line of the target transformer substation is a fault feeder line; the target substation outlet feeder line is any one of the X substation outlet feeder lines.

Optionally, in another possible design manner, the first grid parameters at least include an active load capacity parameter, a reactive load capacity parameter, a line resistance, and a line reactance, and the second grid parameters at least include an active load demand parameter, a reactive load demand parameter, and a voltage extreme value parameter; under the condition that the line node is a power supply node, the second power grid parameters further comprise an active power output extreme value parameter and a reactive power output extreme value parameter; the third power grid parameters at least comprise a first on-off variable, a first direction variable, a second direction variable, active power and reactive power; the fourth grid parameters at least comprise a second on-off variable and a voltage parameter; under the condition that the line node is a power supply node, the fourth power grid parameter further comprises active power output and reactive power output; the first on-off variable, the first direction variable, the second direction variable and the second on-off variable are binary variables, and the active power, the reactive power, the active output, the reactive output and the voltage parameter are continuous variables.

Optionally, in another possible design, the obtaining module 11 is specifically configured to:

acquiring X public information model files corresponding to X trunk lines; and analyzing the X public information model files based on a preset analysis rule to obtain topological data.

Optionally, the power transfer verification apparatus for the power distribution network line may further include a storage module, where the storage module is configured to store a program code of the power transfer verification apparatus for the power distribution network line, and the like.

As shown in fig. 5, the embodiment of the present application further provides a power transfer verification apparatus for a power distribution network, which includes a memory 41, a processor (e.g., 42-1 and 42-2 in fig. 5), a bus 43, and a communication interface 44; the memory 41 is used for storing computer execution instructions, and the processor is connected with the memory 41 through a bus 43; when the power distribution network line power supply switching verification device operates, the processor executes the computer execution instructions stored in the memory 41 to make the power distribution network line power supply switching verification device execute the power distribution network line power supply switching verification method provided by the above embodiment.

In a particular implementation, as one embodiment, the processor may include one or more Central Processing Units (CPUs), such as CPU0 and CPU1 shown in FIG. 5. And as an example, the distribution network line re-power verification device may include a plurality of processors, such as processor 42-1 and processor 42-2 shown in fig. 5. Each of these processors may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The memory 41 may be, but is not limited to, a read-only memory 41 (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 41 may be self-contained and coupled to the processor via a bus 43. The memory 41 may also be integrated with the processor.

In a specific implementation, the memory 41 is used for storing data in the present application and computer-executable instructions corresponding to software programs for executing the present application. The processor may perform various functions of the distribution network line switchback power verification device by running or executing software programs stored in memory 41 and invoking data stored in memory 41.

The communication interface 44 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as a control system, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc. The communication interface 44 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.

The bus 43 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an extended ISA (enhanced industry standard architecture) bus, or the like. The bus 43 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 5, but that does not indicate only one bus or one type of bus.

As an example, with reference to fig. 4, the function implemented by the obtaining module in the power distribution network line power transfer verification apparatus is the same as the function implemented by the receiving unit in fig. 5, and the function implemented by the verification module in the power distribution network line power transfer verification apparatus is the same as the function implemented by the processor in fig. 5. When the power transfer verification device of the power distribution network line comprises the storage module, the function realized by the storage module is the same as that realized by the storage in fig. 5.

For the explanation of the related contents in this embodiment, reference may be made to the above method embodiments, which are not described herein again.

Through the description of the above embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions. For the specific working processes of the above-described system, device and unit, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.

The embodiment of the application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores instructions, and when the computer executes the instructions, the computer is enabled to execute the power transfer verification method for the power distribution network circuit provided by the embodiment.

The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a RAM, a ROM, an erasable programmable read-only memory (EPROM), a register, a hard disk, an optical fiber, a CD-ROM, an optical storage device, a magnetic storage device, any suitable combination of the foregoing, or any other form of computer readable storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). In embodiments of the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A power transfer verification method for a power distribution network line is characterized by comprising the following steps:

acquiring topological data of a line topological structure of an area to be checked; the line topological structure is a topological structure of X trunk lines of the area to be checked, one trunk line is composed of at least one branch line, and one branch line is formed by connecting two line nodes; the topology data at least comprises node connection data of each branch line, a parameter value of a first power grid parameter of each branch line, a node attribute of each line node and a parameter value of a second power grid parameter of each line node in the X main trunk lines; wherein X is a positive integer;

determining X transformer substation outlet feeder lines from each branch line based on the node connection data of each branch line and the node attribute of each line node;

inputting the topological data into a preset power transfer and supply mathematical model, determining power transfer and supply verification results of the X transformer substation outlet feeders based on output results of the preset power transfer and supply mathematical model, and determining power transfer and supply verification results of the area to be verified according to the power transfer and supply verification results of the X transformer substation outlet feeders; the preset power conversion and supply mathematical model is a mixed integer linear programming model established based on preset constraint conditions and a preset objective function; the preset constraint condition is at least one corresponding relation established based on a preset decision ration and a preset decision variable, the preset decision ration comprises the first power grid parameter and the second power grid parameter, and the preset decision variable comprises a third power grid parameter of each branch line and a fourth power grid parameter of each line node; the preset target function is used for representing the maximum energy conversion capacity of the area to be verified under the condition that the outlet feeder line of the target transformer substation is a fault feeder line; the target substation outlet feeder line is any one of the X substation outlet feeder lines.

2. The method for verifying the power transfer and supply of the power distribution network line according to claim 1, wherein the inputting the topological data into a preset power transfer and supply mathematical model, determining the power transfer and supply verification results of the X substation outlet feeders based on the output result of the preset power transfer and supply mathematical model, and determining the power transfer and supply verification result of the area to be verified according to the power transfer and supply verification results of the X substation outlet feeders comprises:

determining a verification sequence for performing power transfer verification on the X transformer substation outlet feeders based on a preset rule;

step A: determining a current substation outlet feeder line according to the verification sequence, inputting the topological data into the preset power transfer mathematical model, and determining a power transfer verification result of the current substation outlet feeder line based on an output result of the preset power transfer mathematical model;

and B: judging whether a power conversion and supply verification result of the current substation outlet feeder line passes verification;

and C: under the condition that the power transfer and supply verification result of the current substation outlet feeder line is determined to be not passed through verification, determining that the power transfer and supply verification result of the area to be verified is not passed through verification; determining whether the current substation outlet feeder line is the last substation outlet feeder line or not under the condition that the power transfer verification result of the current substation outlet feeder line is determined to be passed through verification;

step D: under the condition that the current substation outlet feeder line is determined to be the last substation outlet feeder line, determining that the power transfer verification result of the to-be-verified area is verified to be passed; and under the condition that the current substation outlet feeder line is determined not to be the last substation outlet feeder line, repeating the steps A to C until the power transfer verification result of the current substation outlet feeder line is determined to be that the verification does not pass or the current substation outlet feeder line is determined to be the last substation outlet feeder line.

3. The method for verifying converted power of the distribution network line according to claim 2, wherein the first grid parameter at least comprises an active load capacity parameter, and the second grid parameter at least comprises an active load demand parameter; the method for determining the verification sequence for performing power transfer verification on the X transformer substation outlet feeders based on the preset rules comprises the following steps:

respectively determining candidate nodes corresponding to the X transformer substation outlet feeder lines based on the node connection data of each branch line;

respectively determining the load rate of the X transformer substation outlet feeders based on the parameter values of the active load demand parameters of the candidate nodes corresponding to the X transformer substation outlet feeders and the parameter values of the active load capacity parameters of the X transformer substation outlet feeders;

and determining the checking sequence according to the load rate sequence of the X transformer substation outlet feeder lines.

4. The method according to claim 1, wherein the first grid parameters comprise at least an active load capacity parameter, a reactive load capacity parameter, a line resistance and a line reactance, and the second grid parameters comprise at least an active load demand parameter, a reactive load demand parameter and a voltage limit parameter; under the condition that the line node is a power supply node, the second power grid parameters further comprise an active power output extreme value parameter and a reactive power output extreme value parameter;

the third power grid parameters at least comprise a first on-off variable, a first direction variable, a second direction variable, active power and reactive power; the fourth grid parameters at least comprise a second on-off variable and a voltage parameter; under the condition that the line node is a power supply node, the fourth power grid parameter further comprises active output and reactive output;

the first on-off variable, the first direction variable, the second direction variable and the second on-off variable are binary variables, and the active power, the reactive power, the active power output, the reactive power output and the voltage parameter are continuous variables.

5. The method for verifying the converted power supply of the distribution network line according to claim 4, wherein the preset objective function is a function related to the second on-off variable and the active load demand parameter;

the preset constraint conditions at least comprise a power flow balance constraint condition, a line voltage drop constraint condition, a line power constraint condition, a main transformer power constraint condition, a node voltage constraint condition and a radial constraint condition.

6. The method for verifying the transfer power supply of the power distribution network line according to any one of claims 1 to 5, wherein the obtaining of the topology data of the line topology structure of the area to be verified comprises:

acquiring X public information model files corresponding to the X trunk lines;

and analyzing the X public information model files based on a preset analysis rule to obtain the topology data.

7. The utility model provides a power transfer calibration equipment of distribution network line which characterized in that includes:

the acquisition module is used for acquiring topological data of a line topological structure of an area to be checked; the line topological structure is a topological structure of X trunk lines of the area to be checked, one trunk line consists of at least one branch line, and the other branch line consists of two line nodes which are connected; the topology data at least comprises node connection data of each branch line, a parameter value of a first power grid parameter of each branch line, a node attribute of each line node and a parameter value of a second power grid parameter of each line node in the X main trunk lines; wherein X is a positive integer;

the determining module is used for determining X transformer substation outlet feeder lines from the branch lines based on the node connection data of the branch lines and the node attributes of the line nodes;

the verification module is used for inputting the topological data into a preset power conversion and supply mathematical model, determining the power conversion and supply verification result of the X transformer substation outlet feeders based on the output result of the preset power conversion and supply mathematical model, and determining the power conversion and supply verification result of the area to be verified according to the power conversion and supply verification result of the X transformer substation outlet feeders; the preset power conversion and supply mathematical model is a mixed integer linear programming model established based on preset constraint conditions and a preset objective function; the preset constraint condition is at least one corresponding relation established based on a preset decision ration and a preset decision variable, the preset decision ration comprises the first power grid parameter and the second power grid parameter, and the preset decision variable comprises a third power grid parameter of each branch line and a fourth power grid parameter of each line node; the preset target function is used for representing the maximum energy conversion capacity of the area to be verified under the condition that the outlet feeder line of the target transformer substation is a fault feeder line; the target substation outlet feeder line is any one of the X substation outlet feeder lines.

8. A power transfer calibration device of a power distribution network line is characterized by comprising a memory, a processor, a bus and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through the bus;

when the power distribution network line power supply conversion verification device is operated, a processor executes the computer execution instructions stored in the memory to enable the power distribution network line power supply conversion verification device to execute the power distribution network line power supply conversion verification method according to any one of claims 1 to 6.

9. A computer-readable storage medium, having stored therein instructions, which, when executed by a computer, cause the computer to execute a method of verifying the transfer of power to an electric distribution network line according to any one of claims 1 to 6.