CN116247670A - Method, device, equipment and medium for analyzing N-1 load transfer of transformer substation - Google Patents

Method, device, equipment and medium for analyzing N-1 load transfer of transformer substation Download PDF

Info

Publication number
CN116247670A
CN116247670A CN202310416781.1A CN202310416781A CN116247670A CN 116247670 A CN116247670 A CN 116247670A CN 202310416781 A CN202310416781 A CN 202310416781A CN 116247670 A CN116247670 A CN 116247670A
Authority
CN
China
Prior art keywords
transformer
feeder
load
substation
feeder line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310416781.1A
Other languages
Chinese (zh)
Inventor
赖来源
黄淼华
韦园清
李荣斌
谢伟东
黄秉开
尹仕豪
郭佳才
汤正宇
罗云梅
曾丽丽
骆云峰
张光明
郑岳
许迪宇
杨静琪
彭东明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Power Grid Co Ltd
Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Original Assignee
Guangdong Power Grid Co Ltd
Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Power Grid Co Ltd, Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd filed Critical Guangdong Power Grid Co Ltd
Priority to CN202310416781.1A priority Critical patent/CN116247670A/en
Publication of CN116247670A publication Critical patent/CN116247670A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0631—Resource planning, allocation, distributing or scheduling for enterprises or organisations
    • G06Q10/06315—Needs-based resource requirements planning or analysis
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Energy or water supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H02J3/144—Demand-response operation of the power transmission or distribution network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/58—The condition being electrical
    • H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Landscapes

  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Human Resources & Organizations (AREA)
  • Economics (AREA)
  • Power Engineering (AREA)
  • Strategic Management (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Theoretical Computer Science (AREA)
  • Marketing (AREA)
  • General Physics & Mathematics (AREA)
  • General Business, Economics & Management (AREA)
  • Tourism & Hospitality (AREA)
  • Educational Administration (AREA)
  • Quality & Reliability (AREA)
  • Operations Research (AREA)
  • Game Theory and Decision Science (AREA)
  • Development Economics (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • General Health & Medical Sciences (AREA)
  • Primary Health Care (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The embodiment of the invention discloses a method, a device, equipment and a medium for analyzing N-1 load transfer of a transformer substation, wherein the method for analyzing N-1 load transfer of the transformer substation comprises the following steps: according to the description CIMXML file of the feeder line of the power distribution network, analyzing the wiring mode of the power distribution network through an algorithm to obtain a feeder line group; determining a plurality of feeder segments in a feeder group, and analyzing distribution transformer load values of the feeder segments; and analyzing whether the transformer N-1 transferring requirement is met after transferring the load of the transformer to be stopped according to the distribution transformer load values of the feeder line groups and the feeder line sections. By using the method, the automatic transfer of feeder loads of a large number of feeder groups of the high-voltage distribution network can be rapidly analyzed, so that when one main transformer of the transformer substation is stopped due to failure or is stopped due to maintenance planning, the operation reliability of the high-voltage distribution network is improved and the operation benefit of the high-voltage distribution network is improved by using the N-1 load transfer scheme of the feeder groups of other operation transformers.

Description

Method, device, equipment and medium for analyzing N-1 load transfer of transformer substation
Technical Field
The embodiment of the invention relates to the technical field of high-voltage distribution networks, in particular to a method, a device, equipment and a medium for analyzing N-1 load transfer of a transformer station transformer.
Background
According to the power grid planning work arrangement, N-1 load transfer passing rate analysis of a main transformer of a high-voltage power distribution network substation needs to be carried out every year so as to improve the power supply reliability of the power distribution network. At present, analysis and statistics work is manually carried out, related staff manually identify inter-station connection conditions of a feeder line, segmentation of an automatic switch on the feeder line, calculation of a rotatable load and the like according to a single line diagram of a 10kV line, and finally judge whether an N-1 load conversion scheme of a main transformer of a high-voltage distribution network substation meets the operation or not. However, the analysis process of identification and calculation is manually participated, and the problems of large number of feeder lines, large calculation workload, long calculation time, high error rate and the like exist.
Disclosure of Invention
The invention provides a method, a device, equipment and a medium for analyzing N-1 load transfer of a transformer substation, which are used for rapidly analyzing automatic transfer of feeder loads of a large number of feeder groups of a high-voltage distribution network and improving operation reliability of the high-voltage distribution network.
In a first aspect, an embodiment of the present invention provides a method for analyzing N-1 load transfer of a transformer of a substation, including:
according to a distribution network feeder line description CIMXML file, carrying out distribution network wiring mode analysis through an algorithm to obtain a feeder line group, wherein the feeder line group is a distribution network line with direct or indirect connection;
Determining a plurality of feeder segments in the feeder group, and analyzing distribution transformer load values of the feeder segments, wherein the distribution transformer load values are obtained according to a historical distribution transformer daily maximum load curve;
and analyzing whether the transformer N-1 transferring requirement is met after transferring the load of the transformer to be stopped according to the distribution transformer load values of the feeder line groups and the feeder line sections.
In a second aspect, an embodiment of the present invention further provides a transformer station transformer N-1 load transfer analysis device, including:
the feeder line group analysis module is used for carrying out distribution network wiring mode analysis through an algorithm according to a distribution network feeder line description CIMXML file to obtain a feeder line group, wherein the feeder line group is a distribution network line with direct or indirect connection;
the feeder segment matching module is used for determining a plurality of feeder segments in the feeder group and analyzing distribution transformer load values of the feeder segments, wherein the distribution transformer load values are obtained according to a historical distribution transformer day maximum load curve;
and the load transfer analysis module is used for analyzing whether the transfer requirement of the transformer N-1 is met after the transfer load of the transformer to be stopped is met according to the distribution load values of the feeder line groups and the feeder line sections.
In a third aspect, an embodiment of the present invention further provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the method for analyzing load transfer of a transformer substation N-1 according to any one of the first aspects when the computer program is executed.
In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements a method for analyzing a load transfer of a substation transformer N-1 according to any one of the first aspects.
The embodiment of the invention provides a method, a device, equipment and a medium for analyzing N-1 load transfer of a transformer substation, wherein the method for analyzing N-1 load transfer of the transformer substation comprises the following steps: according to the description CIMXML file of the feeder line of the power distribution network, analyzing the wiring mode of the power distribution network through an algorithm to obtain a feeder line group, wherein the feeder line group is a power distribution network line with direct or indirect connection; determining a plurality of feeder segments in a feeder group, and analyzing distribution transformer load values of the feeder segments, wherein the distribution transformer load values are obtained according to a historical distribution transformer daily maximum load curve; and analyzing whether the transformer N-1 transferring requirement is met after transferring the load of the transformer to be stopped according to the distribution transformer load values of the feeder line groups and the feeder line sections. By utilizing the method, the automatic transfer of feeder loads of a large number of feeder groups of the high-voltage distribution network can be rapidly analyzed, the workload of related workers of power grid planning is reduced, when one main transformer of the transformer substation is stopped due to failure or is stopped due to maintenance planning, the operation reliability of the high-voltage distribution network is improved, the operation benefit of the high-voltage distribution network is improved, and the power failure area is reduced by using the N-1 load transfer scheme of the feeder groups of other operation transformers.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for analyzing N-1 load transfer of a transformer station according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of another method for analyzing N-1 load transfer of a transformer station according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of another method for analyzing N-1 load transfer of a transformer station according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of another method for analyzing N-1 load transfer of a transformer station according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart of another method for analyzing N-1 load transfer of a transformer of a substation according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a transformer N-1 load transfer analysis device of a substation according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic flow chart of a method for analyzing N-1 load transfer of a transformer substation, which is provided by the embodiment of the present invention, where the embodiment is applicable to a case where N-1 load transfer is required when a main transformer in a transformer substation of a high-voltage distribution network is shut down due to a fault or is shut down due to a maintenance schedule, the N-1 load transfer analysis method may be performed by an N-1 load transfer analysis device of the transformer substation, the N-1 load transfer analysis device may be implemented in a form of hardware and/or software, and the N-1 load transfer analysis device may be configured in a control board. As shown in FIG. 1, the N-1 load transfer analysis method comprises the following steps:
s110, analyzing a distribution network wiring mode through an algorithm according to a distribution network feeder description CIMXML file to obtain a feeder group, wherein the feeder group is a distribution network line with direct or indirect connection.
Specifically, in a distribution network feeder description CIMXML (wherein CIM (Common Information Model) is a high-voltage distribution network public information model, XML (Extensible Markup Language) is a markup extension language) file of an international standard, distribution equipment data of a feeder of a distribution network, connection topology relationship data of each distribution equipment, automation control data of a part of distribution equipment and the like are included. According to the description CIMXML file of the feeder line of the power distribution network, analyzing the wiring mode of the power distribution network through an algorithm, analyzing whether a power distribution device such as a switch exists between the feeder lines in the file, and forming a feeder line group by a feeder line and the feeder line which has direct or indirect connection relation with the feeder line to obtain the data of the feeder line group.
S120, determining a plurality of feeder sections in the feeder group, and analyzing distribution transformer load values of the feeder sections, wherein the distribution transformer load values are obtained according to a historical distribution transformer daily maximum load curve.
Specifically, grading treatment is carried out on the feeder line groups, physical segmentation relations of the feeder line groups are determined, connection relations among all feeder line segments are analyzed, distribution transformer load values of all feeder line segments in the feeder line groups are analyzed according to a historical distribution transformer daily maximum load curve, corresponding relations are established between all feeder line segments and the distribution transformer load values, and data support is provided for N-1 load transfer of a subsequent main transformer.
S130, analyzing whether the transfer load of the transformer to be stopped meets the transfer requirement of the transformer N-1 according to the distribution load values of the feeder line groups and the feeder line sections.
Specifically, according to the data of the feeder line groups and the data of the distribution transformer load values of all feeder line sections in the feeder line groups, whether the transformer N-1 switching requirement is met after the transformer to be stopped is switched to load is analyzed in the high-voltage distribution network substation, and whether the switching load quantity exceeds the rated capacity of the running transformer can be judged by way of example, so that the method is suitable for intelligent analysis of a grid frame, a natural sectionalizing and an automatic sectionalizing switch of any feeder line wiring mode in the high-voltage distribution network and the distribution transformer load values, provides data basis for planning and construction of the high-voltage distribution network, provides reasonable planning for the grid frame of the high-voltage distribution network, provides reasonable design for high-voltage distribution automation, saves investment cost of the high-voltage distribution network and improves power supply reliability of the high-voltage distribution network.
According to the technical scheme, a CIMXML file is described according to a feeder line of a power distribution network, and analysis of a wiring mode of the power distribution network is carried out through an algorithm to obtain a feeder line group, wherein the feeder line group is a power distribution network line with direct or indirect connection; then determining a plurality of feeder sections in a feeder group, and analyzing distribution transformer load values of the feeder sections, wherein the distribution transformer load values are obtained according to a historical distribution transformer daily maximum load curve; and finally, analyzing whether the transformer N-1 transferring requirement is met after transferring the load of the transformer to be stopped according to the distribution transformer load values of the feeder line groups and the feeder line sections. By utilizing the method, the automatic transfer of feeder loads of a large number of feeder groups of the high-voltage distribution network can be rapidly analyzed, the workload of related workers of power grid planning is reduced, when one main transformer of the transformer substation is stopped due to failure or is stopped due to maintenance planning, the operation reliability of the high-voltage distribution network is improved, the operation benefit of the high-voltage distribution network is improved, and the power failure area is reduced by using the N-1 load transfer scheme of the feeder groups of other operation transformers.
Fig. 2 is a flow chart of another method for analyzing N-1 load transfer of a transformer of a substation according to an embodiment of the present invention, where the embodiment is optimized based on the foregoing embodiment. Optionally, according to a distribution network feeder description CIMXML file, performing distribution network wiring mode analysis by an algorithm to obtain a feeder group, including:
determining a feeder line where the transformer to be shut down is located, and obtaining at least one feeder line which is directly or indirectly connected with the feeder line where the transformer to be shut down is located according to a distribution network feeder line description CIMXML file;
and forming a feeder group by the feeder line where the transformer to be shut down is located and at least one feeder line which is in direct or indirect connection with the feeder line where the transformer to be shut down is located, and determining the naming name and the wiring mode of the feeder group.
For details not yet described in this embodiment, please refer to the above embodiment, as shown in fig. 2, the N-1 load transfer analysis method includes:
s210, determining a feeder line where the transformer to be shut down is located, and obtaining at least one feeder line which is directly or indirectly connected with the feeder line where the transformer to be shut down is located according to a distribution network feeder line description CIMXML file.
Specifically, when a main transformer is out of operation due to fault or out of operation due to maintenance plan in a transformer substation of the high-voltage distribution network, a feeder line where the transformer to be out of operation is located is determined. And according to the distribution network feeder line description CIMXML file, analyzing the distribution network connection mode through an algorithm, and exemplarily, analyzing the data of the distribution network switch and the connection topology relationship data between the distribution network switch and the feeder line according to the distribution network feeder line description CIMXML file, wherein the information fields, such as 'is Ring' and 'normal Open' in the distribution network feeder line description CIMXML file, are expressed as true, so that the distribution network looped network switch is diagnosed, and the attribute values of 'Circuit 1' and 'Circuit 2' in the attribute field of the distribution network looped network switch are judged, so that the distribution network looped network switch is connected with two feeder lines, namely, the two feeder lines are connected together through the distribution network looped network switch, and at least one feeder line which is directly or indirectly connected with the feeder line where the transformer to be shut down is located is determined by adopting the same analysis method.
S220, forming a feeder group by the feeder where the transformer to be shut down is located and at least one feeder which is in direct or indirect connection with the feeder where the transformer to be shut down is located, and determining the naming name and the wiring mode of the feeder group.
Specifically, the feeder line where the transformer to be shut down is located and at least one feeder line which is directly or indirectly connected with the feeder line where the transformer to be shut down is formed into a feeder line group, the naming name and the wiring mode of the feeder line group are determined, and the feeder line where the transformer to be shut down is an F1 feeder line of an A transformer substation and is analyzed according to a distribution network feeder line description CIMXML file, wherein the analyzed feeder line which is directly or indirectly connected with the feeder line where the transformer to be shut down is: the A transformer substation F2 feeder and the B transformer substation F1 feeder, so that the A transformer substation F1 feeder, the A transformer substation F2 feeder and the B transformer substation F1 feeder form a feeder group, the name of the feeder group is 'A transformer substation F1 feeder group', and the wiring mode of the feeder group is 3-1; or the feeder line where the transformer to be shut down is an F2 feeder line of the substation A, and according to the description CIMXML file of the feeder line of the distribution network, the analyzed feeder line which has direct or indirect connection with the feeder line where the transformer to be shut down is: the A transformer substation F1 feeder, the C transformer substation F1 feeder and the C transformer substation F2 feeder, so that the A transformer substation F2 feeder, the A transformer substation F1 feeder, the C transformer substation F1 feeder and the C transformer substation F2 feeder form a feeder group, the name of the feeder group is 'A transformer substation F2 feeder group', and the wiring mode of the feeder group is 4-1.
S230, determining a plurality of feeder segments in the feeder group, and analyzing the distribution transformer load value of each feeder segment, wherein the distribution transformer load value is obtained according to a historical distribution transformer daily maximum load curve.
S240, analyzing whether the transfer load of the transformer to be stopped meets the transfer requirement of the transformer N-1 according to the distribution load values of the feeder line groups and the feeder line sections.
According to the technical scheme, the CIMXML file is specifically refined according to the feeder line description CIMXML file of the power distribution network, the distribution network wiring mode analysis is carried out through an algorithm, the content of the feeder line group is obtained, the feeder line where the transformer to be shut down is located and at least one feeder line which is in direct or indirect connection with the feeder line where the transformer to be shut down is located are formed into the feeder line group by the method, when the transformer to be shut down is shut down due to a fault and shut down fault due to an overhaul plan, N-1 load transfer of the transformer can be realized through the feeder line group, the operation reliability of the high-voltage distribution network is guaranteed, the operation benefit of the high-voltage distribution network is improved, and the power outage area is effectively reduced.
Fig. 3 is a flow chart of another method for analyzing N-1 load transfer of a transformer of a substation according to an embodiment of the present invention, where the embodiment is optimized based on the above embodiment. Optionally, determining a plurality of feeder segments in the feeder group and analyzing the distribution transformer load value of each feeder segment includes:
According to the distribution network feeder line description CIMXML file, analyzing the physical segmentation relation of the feeder line group through an algorithm to obtain a plurality of feeder line segments;
determining the distribution transformer load value of each feeder section according to the historical distribution transformer daily maximum load curve;
and carrying out the analysis of the transferable load quantity by an algorithm according to the distribution transformer load value of each feeder section and the capacity of the transformers in the feeder group.
For details not yet described in this embodiment, please refer to the above embodiment, as shown in fig. 3, the N-1 load transfer analysis method includes:
s310, analyzing a distribution network wiring mode through an algorithm according to a distribution network feeder description CIMXML file to obtain a feeder group, wherein the feeder group is a distribution network line with direct or indirect connection.
S320, according to the distribution network feeder line description CIMXML file, analyzing the physical segmentation relation of the feeder line group through an algorithm to obtain a plurality of feeder line segments.
Specifically, physical segmentation relation analysis of a feeder group is performed through an algorithm according to a distribution network feeder description CIMXML file, and data of an automatic segmentation switch and connection topology relation data between the automatic segmentation switch and a feeder section can be analyzed according to the distribution network feeder description CIMXML file, information fields which are represented as the segmentation switch in the distribution network feeder description CIMXML file, such as 'break' and the like are diagnosed as the segmentation switch, attribute information of an IP Address in the information field of the segmentation switch is diagnosed, such that the segmentation switch is judged to be the automatic segmentation switch, the automatic segmentation switch can be opened and closed through remote control, the automatic segmentation switch can be a Breaker, and the feeder group can be physically segmented according to the automatic segmentation switch, so that a plurality of feeder sections are obtained.
S330, determining the distribution transformer load value of each feeder section according to the historical distribution transformer daily maximum load curve.
Specifically, according to a historical daily maximum load curve of distribution transformer, analyzing distribution transformer load values of all feeder sections in a feeder group, establishing a corresponding relation between the feeder sections and the distribution transformer load values, and particularly, enabling all feeder sections to be in a physical sectional relation which can be controlled by an automatic sectional switch so as to provide data support for N-1 load transfer of a transformer. For example, the feeder group where the transformer to be shutdown is located may be divided into a plurality of feeder segments according to the automated sectionalizer, and when there are 2 automated sectionalizers in the feeder where the transformer to be shutdown is located, the feeder where the transformer to be shutdown is located may be divided into 3 feeder segments, where the distribution transformer load value corresponding to the first feeder segment may be 30W, the distribution transformer load value corresponding to the second feeder segment may be 20V, and the distribution transformer load value corresponding to the third feeder segment may be 40W.
S340, carrying out analysis on the transferable load quantity through an algorithm according to the distribution transformer load value of each feeder section and the capacity of the transformers in the feeder group.
Specifically, in one feeder line, the feeder line is divided into a plurality of feeder line segments according to an automatic sectionalizing switch, a corresponding relation is established between each feeder line segment and a distribution transformer load value, and a rotatable load amount analysis is performed through an algorithm according to the distribution transformer load value of each feeder line segment and the capacity of a transformer in the feeder line. The distribution transformer load value in the feeder line where the transformer to be shutdown is located needs to be transferred to other feeder lines, the capacity of the other operation transformers is the maximum load amount of power which can be supplied in the corresponding feeder lines, however, the distribution transformer load value required by the distribution equipment exists in the feeder lines corresponding to the other operation transformers, the capacity of the other operation transformers is the difference value existing between the maximum load amount of power which can be supplied in the corresponding feeder lines and the distribution transformer load value required by the distribution equipment exists in the feeder lines corresponding to the other operation transformers, the maximum distribution transformer load value capable of supplying the load for the other operation transformers is required to be judged, and in addition, the limit value of the passing current flow in the feeder lines corresponding to the other operation transformers needs to be judged so as to determine whether the other operation transformers can normally operate.
S350, analyzing whether the transfer load of the transformer to be stopped meets the transfer requirement of the transformer N-1 according to the distribution load values of the feeder line groups and the feeder line sections.
According to the technical scheme, the plurality of feeder sections in the feeder groups are determined, the distribution transformer load value content of each feeder section is analyzed, by means of the method, when one main transformer of a high-voltage distribution network transformer substation is stopped due to failure or is stopped due to maintenance planning, automatic transfer of feeder loads of a large number of feeder groups of the high-voltage distribution network can be rapidly analyzed, workload of related staff of power network planning is reduced, working efficiency of the related staff is improved, operation reliability of the high-voltage distribution network is guaranteed, operation benefit of the high-voltage distribution network is improved, and data support is provided for N-1 load transfer of the main transformer.
Fig. 4 is a flow chart of another method for analyzing N-1 load transfer of a transformer of a substation according to an embodiment of the present invention, where the embodiment is optimized based on the above embodiment. Optionally, analyzing whether the transformer N-1 transferring requirement is met after transferring the load of the transformer to be stopped according to the distribution transformer load values of the feeder line group and each feeder line section, including:
When other operation transformers in the transformer substation containing the transformer to be shut down can supply power to all loads in the transformer substation, the other operation transformers in the transformer substation supply power to the loads on the feed line where the transformer to be shut down is located;
when other operating transformers in the transformer substation including the transformer to be shutdown cannot supply power to all loads in the transformer substation, loads exceeding the total capacity of the other operating transformers in the transformer substation are transferred to the other transformer substations.
Further, when other operation transformers in the transformer substation including the transformer to be shutdown cannot supply power to all loads in the transformer substation, after transferring loads exceeding the total capacity of the other operation transformers in the transformer substation to the other transformer substations, the method further includes:
if each running transformer in the feeder line group can not supply power to the load on the feeder line where the transformer to be shut down is located, the transformer to be shut down is subjected to power failure treatment, or a connection relation with other substations is established through an automatic connection switch.
For details not yet described in this embodiment, please refer to the above embodiment, as shown in fig. 4, the N-1 load transfer analysis method includes:
s410, analyzing a distribution network wiring mode through an algorithm according to a distribution network feeder description CIMXML file to obtain a feeder group, wherein the feeder group is a distribution network line with direct or indirect connection.
S420, determining a plurality of feeder segments in a feeder group, and analyzing distribution transformer load values of the feeder segments, wherein the distribution transformer load values are obtained according to a historical distribution transformer daily maximum load curve.
And S430, when other operation transformers in the transformer substation containing the transformer to be shut down can supply power to all loads in the transformer substation, the other operation transformers in the transformer substation supply power to the loads on the feed line where the transformer to be shut down is located.
Specifically, when a main transformer of a high-voltage distribution network transformer substation is shut down due to failure or shut down due to maintenance planning, the load on the feeder line where the transformer to be shut down is required to be transferred to other feeder lines, and in the N-1 load transfer process, the load on the feeder line where the transformer to be shut down is required to be transferred to the feeder line where other operation transformers in the same transformer substation are located, and it is required to be noted that the feeder line where the other operation transformers in the same transformer substation and the feeder line where the transformer to be shut down belong to the same feeder line group, so that N-1 load transfer can be realized. If the total load value obtained through the total load in the same substation is compared with the sum of the capacities of other operation transformers according to the historical daily maximum load distribution curve, the other operation transformers in the same substation are not overloaded, the other operation transformers in the same substation can receive the load on the feeder line where the transformer to be shut down is located, namely, the other operation transformers in the same substation can supply power to the load on the feeder line where the transformer to be shut down is located, and the other operation transformers in the same substation can supply power to the total load in the same substation by adjusting the operation mode, bus connection mode and the like of the other operation transformers in the same substation, so that redundancy of the transformer to be shut down is realized, and the power supply reliability in the substation is improved.
And S440, when other operation transformers in the transformer substation containing the transformer to be shut down cannot supply power to all loads in the transformer substation, transferring the loads exceeding the total capacity of the other operation transformers in the transformer substation to other transformer substations.
Specifically, if the total load value obtained by the total load in the same substation station according to the historical daily maximum load distribution curve is compared with the sum of the capacities of other operation transformers, at least one condition of overload occurs in the other operation transformers in the same substation station, the other operation transformers in the same substation station only receive the partial load on the feeder line where the transformer to be shut down is located, that is, the other operation transformers in the same substation station can supply power to the partial load on the feeder line where the transformer to be shut down is located, the load exceeding the total capacity of the other operation transformers in the same substation station is transferred to the feeder line where the operation transformers of the other substations are located, and it is required to be explained that the feeder line where the operation transformers of the other substations are located and the feeder line where the transformer to be shut down belong to the same feeder line group, so that N-1 load transfer can be realized.
Optionally, when other operating transformers in the substation including the transformer to be shutdown cannot supply power to all loads in the substation, transferring loads exceeding the total capacity of the other operating transformers in the substation to the other substations, including:
s4401, sequencing the operation transformers in other substations according to the order of the load values from large to small, wherein the other substations and the substations to which the to-be-shutdown transformers belong are located in the same feeder group.
Specifically, when other operation transformers in a transformer substation including a transformer to be shut down cannot supply power to all loads in the transformer substation, loads exceeding the total capacity of the other operation transformers in the transformer substation need to be transferred to other transformer substations, whether direct or indirect connection exists between a feeder line where the operation transformer of the other transformer substation is located and a feeder line where the transformer to be shut down is located or not is judged firstly, and whether a connection switch between the feeder line where the operation transformer of the other transformer substation is located and the feeder line where the transformer to be shut down is an automatic switch is judged secondly, namely, the feeder line where the operation transformer of the other transformer substation and the feeder line where the transformer to be shut down are located belong to the same feeder line group, and all the feeder lines comprise automatic sectional switches, so that N-1 load transfer can be realized. In the same feeder line group, the operation transformers in other transformer stations are sequenced according to the order of the load values from large to small, and according to the historical distribution transformer daily maximum load curve and the multiple N-1 load transfer processes, the load values born by other operation transformers outside the station are 0.83 times of the load values born by other operation transformers in the station. For example, for a feeder group named as an "a-substation F1 feeder group", the connection mode of the feeder group is 4-1, the feeder group includes an a-substation F1 feeder, an a-substation F2 feeder, a B-substation F1 feeder and a B-substation F2 feeder, the main transformer corresponding to the a-substation F1 feeder is shut down due to failure or is shut down due to maintenance planning, and the a-substation F2 feeder cannot supply power to all loads in the a-substation, where the load of the a-substation F1 feeder exceeding the total capacity of other operation transformers in the a-substation is 30W, then the load exceeding the total capacity of other operation transformers in the a-substation needs to be transferred to the B-substation, the B-substation includes the B-substation F1 feeder and the B-substation F2 feeder, where the load value that the B-substation F1 feeder can bear is 20W, and the load value that the B-substation F2 feeder can bear is 10W, and then the operation transformers are ordered in order from large to small, and the B-substation F1 feeder is located in front of the B-substation F2.
And S4402, sequentially distributing the excess load to at least part of the operation transformers in other substations according to the sequence of the operation transformers in other substations until the excess load is completely transferred, wherein the excess load is the load exceeding the total capacity of the other operation transformers in the substations.
Optionally, the overload is sequentially distributed to at least part of the running transformers in other substations according to the sequence of the running transformers in other substations until the overload is completely transferred, including: when the total load value of the feeder lines in the feeder line group and the minimum line diameter bearing load value in the line are smaller than the power supply load of the feeder lines, dividing the feeder lines where the transformers to be stopped are positioned by utilizing an automatic sectional switch to obtain a plurality of sectional transferring load values; and sequentially distributing the plurality of segmented transfer load values to at least part of the running transformers in other substations according to the sequence of the running transformers in other substations until the transfer is completed after the load is exceeded.
Specifically, loads exceeding the total capacity of other operation transformers in the substation are sequentially distributed to at least part of operation transformers in other substations according to the sequence of the operation transformers in other substations and the sequence of the load values from big to small, and after each distribution to a feeder where one operation transformer is located, whether the load of the feeder where the to-be-shut-down transformer is located is completely transferred or not is judged, and whether normal operation conditions are met or not after the other operation transformers accept the load or not is judged until the excessive load is completely transferred or not. For example, for a feeder group named as an "a substation F1 feeder group", the connection mode of the feeder group is 4-1, the feeder group includes an a substation F1 feeder, a B substation F2 feeder and a B substation F3 feeder, the main transformer corresponding to the a substation F1 feeder is shut down due to failure or is shut down due to maintenance planning, where the load on the a substation F1 feeder is 30W, the load on the a substation F1 feeder needs to be completely transferred to the B substation, the B substation includes a B substation F1 feeder, a B substation F2 feeder and a B substation F3 feeder, where the load value that the B substation F1 feeder can bear is 10W, the load value that the B substation F2 feeder can bear is 15W, and the load value that the B substation F3 feeder can bear is 8W, and then the running transformers are sequenced into the B substation F2 feeder, the B substation F1 and the B substation F3 according to the order that the load values that can bear is from big to small. The A transformer substation F1 feeder can transfer the load of 15W to the B transformer substation F2 feeder, and it is to be noted that the load of 15W in the A transformer substation F1 feeder may correspond to a plurality of feeder sections, and one feeder section (including the load of 15W) and the B transformer substation F2 feeder can be connected through an automatic sectionalizer so that the B transformer substation F2 feeder supplies power to the feeder section (including the load of 15W), and whether the total load of the B transformer substation F2 feeder and the minimum line diameter load in the line of the B transformer substation F2 feeder are smaller than the rated value of the power supply load of the transformer on the B transformer substation F2 feeder is judged, and if the load is smaller than the rated value, the B transformer substation F2 feeder meets the requirement of band operation. The feeder of the A transformer substation F1 transfers the load of 10W to the feeder of the B transformer substation F1, and it is to be noted that the load of 10W in the feeder of the A transformer substation F1 corresponds to a plurality of feeder segments, one feeder segment (including the load of 10W) can be just communicated with the feeder of the B transformer substation F1 through an automatic sectionalizer, so that the feeder of the B transformer substation F1 supplies power to the feeder segment (including the load of 10W), and it is also determined whether the total load of the feeder of the B transformer substation F1 and the load of the minimum line diameter in the line of the feeder of the B transformer substation F1 are smaller than the rated value of the power supply load of the transformer on the feeder of the B transformer substation F1, if smaller, the feeder of the B transformer substation F1 meets the requirement of the on-line operation, if larger than or equal, the feeder of the B transformer substation F1 does not meet the requirement of the on-line operation, and the load of 10W on the feeder of the A transformer substation F1 cannot be transferred to the B transformer substation F1. When the B substation F1 feeder meets the requirement of on-line operation, the A substation F1 feeder transfers the 5W load to the B substation F3 feeder, and it is required to be noted that the 5W load in the A substation F1 feeder corresponds to a plurality of feeder sections, and one feeder section (containing the 5W load) and the B substation F3 feeder can be communicated through an automatic sectionalizer, so that the B substation F3 feeder supplies power to the feeder section (containing the 5W load), and it is also determined whether the total load of the B substation F3 feeder and the minimum line path bearing load in the line of the B substation F3 feeder are smaller than the rated value of the power supply load of the transformer on the B substation F3 feeder, and if so, the B substation F3 feeder meets the requirement of on-line operation, so far, the N-1 transfer process of the load of the feeder where the transformer to be shut down is located is ended.
S450, if each running transformer in the feeder line group cannot supply power to the load on the feeder line where the transformer to be shut down is located, the transformer to be shut down is subjected to power failure processing, or a connection relation with other substations is established through an automatic connection switch.
Specifically, if each running transformer in the feeder group cannot supply power to the load on the feeder where the transformer to be shut down is located, the transformer to be shut down is subjected to power failure processing, or a connection relation with other substations is established through an automatic connection switch. For example, for a feeder group named as an "a substation F1 feeder group", the connection mode of the feeder group is 4-1, the feeder group includes an a substation F1 feeder, a B substation F2 feeder, and a B substation F3 feeder, the main transformer corresponding to the a substation F1 feeder is shut down due to a fault or is shut down due to an overhaul plan, where the load on the a substation F1 feeder is 30W, the load on the a substation F1 feeder needs to be completely transferred to the B substation, the B substation includes a B substation F1 feeder, a B substation F2 feeder, and a B substation F3 feeder, where the load value that the B substation F1 feeder can bear is 10W, the load value that the B substation F2 feeder can bear is 8W, and the load value that the B substation F3 feeder can bear is 5W, and then the running transformers are sequenced into the B substation F1 feeder, the B substation F2, and the B substation F3 in order from large to small. The A transformer substation F1 feeder line can firstly transfer 10W of load to the B transformer substation F1 feeder line, then transfer 8W of load to the B transformer substation F2 feeder line, and then transfer 5W of load to the B transformer substation F3 feeder line, in the A transformer substation F1 feeder line group, the B transformer substation is still not completed transferring under the condition that the capacity of each transformer is met, at the moment, a connection relation with other transformer substations can be established through an automatic connection switch, the C transformer substation F1 feeder line is added into the A transformer substation F1 feeder line group through the automatic connection switch, the A transformer substation F1 feeder line can transfer 8W of load to the C transformer substation F1 feeder line, and thus, the N-1 transferring process of the load of the feeder line where the transformer to be operated is located is finished.
According to the technical scheme, the content of whether the transfer supply load of the transformer N-1 to be shut down meets the transfer supply requirement of the transformer is analyzed according to the distribution transformer load values of the feeder line groups and the feeder line sections, the method can be used for rapidly analyzing the automatic transfer supply of the feeder load of a large number of feeder line groups of the high-voltage distribution network, the traditional worker is replaced by manually identifying the inter-station connection condition of the feeder line, the segmentation of the feeder line by an automatic switch and the calculation of the transfer supply load according to a single line diagram of a 10kV line, whether the N-1 load transfer supply of the main transformer of the high-voltage distribution network meets the operation is finally judged, the work load of related workers in power grid planning is reduced, the work efficiency of the related workers is improved, the operation reliability of the high-voltage distribution network is improved by the N-1 load transfer supply scheme of the feeder line groups of one main transformer of the transformer is realized, and the operation reliability of the high-voltage distribution network is improved by the N-1 load transfer supply scheme of the feeder line group when the main transformer is shut down or the operation is planned due to overhaul.
Fig. 5 is a schematic flow chart of another method for analyzing load transfer of a transformer N-1 of a transformer substation, as shown in fig. 5, for a feeder where a transformer to be shutdown is located, a distribution ring network switch can be resolved according to a distribution network feeder description CIMXML file, at least one feeder directly or indirectly connected with the feeder where the transformer to be shutdown is determined, the feeder where the transformer to be shutdown is located and at least one feeder directly or indirectly connected with the feeder where the transformer to be shutdown are formed into a feeder group, the name of the feeder group depends on the feeder where the transformer to be shutdown is located, and the connection mode of the feeder group depends on the number of feeders in the feeder group. In the determined feeder group, an automatic sectional switch can be analyzed according to the distribution network feeder description CIMXML file, a plurality of feeder sections in the feeder group are determined, and distribution transformer load values of the feeder sections are determined according to a historical distribution transformer daily maximum load curve. In the process of transferring the load on the feeder line where the transformer to be shut down is located, firstly judging whether other operation transformers in the same substation station meet the requirement of transferring the load of the transformer N-1, wherein the feeder line where the other operation transformers in the same substation station are located and the feeder line where the transformer to be shut down are located belong to the same feeder line group, if the other operation transformers in the same substation station can supply the load of the whole station, outputting a result meeting the requirement of transferring the load of the transformer N-1, and if the other operation transformers in the same substation station can not supply the load of the whole station, namely, an overload load exists, selecting the operation transformers of other substations to transfer the overload load. The feeder line where the operation transformer of other transformer stations is located should belong to the same feeder line group with the feeder line where the operation transformer to be shut down is located, whether the operation transformer of other transformer stations can supply power to the overload or not through the automation segmentation is required to be judged, if the operation transformer of other transformer stations can supply power to the overload or not, the result of meeting the operation supply of the transformer N-1 load is output, if the operation transformer of other transformer stations can not supply power to the overload or not, the position selection of the automation segmentation switch is required to be readjusted, whether the operation transformer of other transformer stations can supply power to the overload or not through the automation segmentation, if the operation transformer of other transformer stations can supply power to the overload or not through the automation segmentation, the result of meeting the operation supply of the transformer N-1 load can be output, otherwise, the connection relation with other transformer stations can be established through the automation connection switch, the number of the feeder line in the feeder line group is increased, or the operation transformer to be shut down is required to be shut down, and the operation of the feeder line where the operation transformer to be shut down is located is stopped is finished, and the operation of the feeder line where the operation of the transformer to be shut down is located is stopped.
Fig. 6 is a schematic structural diagram of a transformer substation N-1 load transfer analysis device provided by the embodiment of the present invention, where the N-1 load transfer analysis device may be suitable for a case where N-1 load transfer is required when a main transformer in a high-voltage distribution network substation is shut down due to a failure or is shut down due to a maintenance schedule, and the N-1 load transfer analysis device may be implemented in a form of hardware and/or software, and the N-1 load transfer analysis device may be configured in a control board. As shown in fig. 6, the N-1 load transfer analysis device includes:
the feeder group analysis module 51 is configured to analyze a distribution network wiring mode through an algorithm according to a distribution network feeder description CIMXML file, and obtain a feeder group, where the feeder group is a distribution network line with direct or indirect connection; the feeder segment matching module 52 is configured to determine a plurality of feeder segments in a feeder group, and analyze a distribution transformer load value of each feeder segment, where the distribution transformer load value is obtained according to a historical distribution transformer daily maximum load curve; the load transfer analysis module 53 is configured to analyze whether the transfer requirement of the transformer N-1 is met after the transfer load of the transformer to be shutdown is performed according to the distribution load values of the feeder groups and the feeder segments.
According to the technical scheme, a CIMXML file is described according to a feeder line of a power distribution network, and analysis of a wiring mode of the power distribution network is carried out through an algorithm to obtain a feeder line group, wherein the feeder line group is a power distribution network line with direct or indirect connection; then determining a plurality of feeder sections in a feeder group, and analyzing distribution transformer load values of the feeder sections, wherein the distribution transformer load values are obtained according to a historical distribution transformer daily maximum load curve; and finally, analyzing whether the transformer N-1 transferring requirement is met after transferring the load of the transformer to be stopped according to the distribution transformer load values of the feeder line groups and the feeder line sections. By utilizing the method, the automatic transfer of feeder loads of a large number of feeder groups of the high-voltage distribution network can be rapidly analyzed, the workload of related workers of power grid planning is reduced, when one main transformer of the transformer substation is stopped due to failure or is stopped due to maintenance planning, the operation reliability of the high-voltage distribution network is improved, the operation benefit of the high-voltage distribution network is improved, and the power failure area is reduced by using the N-1 load transfer scheme of the feeder groups of other operation transformers.
Optionally, the feeder group analysis module 51 may specifically include a feeder determining unit and a feeder group determining unit, where the feeder determining unit is configured to determine a feeder where the transformer to be shutdown is located, and obtain, according to a power distribution network feeder description CIMXML file, at least one feeder directly or indirectly related to the feeder where the transformer to be shutdown is located, and the feeder group determining unit is configured to combine the feeder where the transformer to be shutdown and the at least one feeder directly or indirectly related to the feeder where the transformer to be shutdown is located into a feeder group, and determine a naming name and a connection mode of the feeder group.
Optionally, the feeder segment matching module 52 may specifically include a feeder segment determining unit, a distribution transformer load value determining unit, and a transferable load amount analyzing unit, where the feeder segment determining unit is configured to analyze a physical segment relationship of a feeder group according to a distribution network feeder description CIMXML file by an algorithm to obtain a plurality of feeder segments, the distribution transformer load value determining unit is configured to determine a distribution transformer load value of each feeder segment according to a historical distribution transformer daily maximum load curve, and the transferable load amount analyzing unit is configured to analyze a transferable load amount by an algorithm according to the distribution transformer load value of each feeder segment and a capacity of a transformer in the feeder group.
Alternatively, the load transferring analysis module 53 may specifically include an in-station load transferring unit and an off-station load transferring unit, where the in-station load transferring unit is configured to, when other operation transformers in the substation including the transformer to be shut down can supply power to all loads in the substation, supply the other operation transformers in the substation to the load on the feeder line where the transformer to be shut down is located, and the off-station load transferring unit is configured to, when the other operation transformers in the substation including the transformer to be shut down cannot supply power to all loads in the substation, transfer loads exceeding the total capacity of the other operation transformers in the substation to the other substations.
Optionally, the off-site load transferring unit may specifically include a load value sequencing subunit and a load transferring subunit, where the load value sequencing subunit is configured to sequence the operating transformers in other substations according to the order of the load values that can be born from big to small, where the other substations and the substations to which the transformers to be shutdown belong are located in the same feeder group, and the load transferring subunit is configured to sequentially allocate excess loads to at least some of the operating transformers in the other substations according to the sequence of the operating transformers in the other substations until the excess loads are all transferred, where the excess loads are loads exceeding the total capacity of the other operating transformers in the substation.
Optionally, the load transferring sub-unit is further configured to divide the feeder line where the transformer to be shutdown is located by using an automatic sectionalizing switch to obtain a plurality of sectionalized transferring load values when the total load value of the feeder lines in the feeder line group and the minimum line diameter bearing load value in the line are both smaller than the power supply load of the feeder lines; and sequentially distributing the plurality of segmented transfer load values to at least part of the running transformers in other substations according to the sequence of the running transformers in other substations until the transfer is completed after the load is exceeded.
Optionally, the load transfer analysis module 53 may specifically further include a load transfer stopping unit, where the load transfer stopping unit is configured to perform power-off processing on the to-be-deactivated transformer if each running transformer in the feeder group cannot supply power to the load on the feeder where the to-be-deactivated transformer is located, or establish a connection relationship with other substations through an automatic connection switch.
The transformer substation transformer N-1 load transfer analysis device provided by the embodiment of the invention can execute the transformer substation transformer N-1 load transfer analysis method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Fig. 7 is a schematic structural diagram of a computer device according to an embodiment of the present invention. Terminal devices are intended to represent various forms of digital computers, such as laptops, desktops, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Terminal devices may also represent various forms of mobile devices such as personal digital assistants, cellular telephones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 7, the terminal device 10 includes one or more processors 11, and a storage means, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the processor 11, wherein the storage means stores computer programs executable by the one or more processors, and the processor 11 can perform various appropriate actions and processes according to the computer programs stored in the Read Only Memory (ROM) 12 or the computer programs loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the terminal device 10 can also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
A plurality of components in the terminal device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as the substation transformer N-1 load transfer analysis method.
In some embodiments, the substation transformer N-1 load transfer analysis method may be implemented as a computer program tangibly embodied on a computer readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the terminal device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the above-described substation transformer N-1 load transfer analysis method may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the substation transformer N-1 load transfer analysis method in any other suitable way (e.g. by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a terminal device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the terminal device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (10)

1. The method for analyzing the N-1 load transfer of the transformer of the substation is characterized by comprising the following steps of:
according to a distribution network feeder line description CIMXML file, carrying out distribution network wiring mode analysis through an algorithm to obtain a feeder line group, wherein the feeder line group is a distribution network line with direct or indirect connection;
Determining a plurality of feeder segments in the feeder group, and analyzing distribution transformer load values of the feeder segments, wherein the distribution transformer load values are obtained according to a historical distribution transformer daily maximum load curve;
and analyzing whether the transformer N-1 transferring requirement is met after transferring the load of the transformer to be stopped according to the distribution transformer load values of the feeder line groups and the feeder line sections.
2. The method for analyzing the N-1 load transfer of the transformer substation according to claim 1, wherein the analyzing the wiring mode of the distribution network by an algorithm according to the description CIMXML file of the feeder line of the distribution network to obtain the feeder line group comprises the following steps:
determining a feeder line where the transformer to be shut down is located, and obtaining at least one feeder line which is directly or indirectly connected with the feeder line where the transformer to be shut down is located according to a distribution network feeder line description CIMXML file;
and forming a feeder group by the feeder line where the transformer to be shut down is located and at least one feeder line which is in direct or indirect connection with the feeder line where the transformer to be shut down is located, and determining the naming name and the wiring mode of the feeder group.
3. The method of analyzing a load transfer of a substation transformer N-1 according to claim 1, wherein determining a plurality of feeder segments in the feeder group and analyzing a distribution transformer load value of each of the feeder segments comprises:
According to the distribution network feeder line description CIMXML file, analyzing the physical segmentation relation of the feeder line group through an algorithm to obtain a plurality of feeder line segments;
determining the distribution transformer load value of each feeder section according to a historical distribution transformer daily maximum load curve;
and carrying out the analysis of the transferable load quantity by an algorithm according to the distribution transformer load value of each feeder section and the capacity of the transformers in the feeder group.
4. The method for analyzing the N-1 load transfer of the transformer substation according to claim 1, wherein analyzing whether the load transfer requirement of the transformer N-1 is satisfied after the transformer to be shut down is transferred according to the distribution load values of the feeder group and each feeder segment comprises:
when other operation transformers in a transformer substation containing the transformer to be shut down can supply power to all loads in the transformer substation, the other operation transformers in the transformer substation supply power to the loads on a feed line where the transformer to be shut down is located;
and when other operation transformers in the transformer substation containing the transformer to be shut down cannot supply power to all loads in the transformer substation, transferring loads exceeding the total capacity of the other operation transformers in the transformer substation to other transformer substations.
5. The method for analyzing the N-1 load transfer of a transformer station according to claim 4, wherein when other operating transformers in the transformer station including the transformer to be shutdown cannot supply all the loads in the transformer station, transferring the load exceeding the total capacity of the other operating transformers in the transformer station to the other transformer station, comprising:
sequencing the operation transformers in the other substations according to the order of the load values from large to small, wherein the other substations and the substations to which the to-be-shutdown transformers belong are positioned in the same feeder line group;
and sequentially distributing the overload to at least part of the operation transformers in the other substations according to the sequence of the operation transformers in the other substations until the overload is completely transferred, wherein the overload is a load exceeding the total capacity of the other operation transformers in the substation.
6. The method for analyzing the load transfer of the transformer substation N-1 according to claim 5, wherein the step of sequentially distributing the excess load to at least a part of the operating transformers in the other substations in the order of the operating transformers in the other substations until the excess load is completely transferred comprises the steps of:
When the total load value of the feeder lines in the feeder line group and the minimum line diameter bearing load value in the line are smaller than the power supply load of the feeder lines, dividing the feeder lines where the transformers to be shut down are positioned by using an automatic sectional switch to obtain a plurality of sectional transferring load values;
and sequentially distributing the plurality of segmented transfer load values to at least part of the operation transformers in the other substations according to the sequence of the operation transformers in the other substations until the transfer of the excess load is completed.
7. The method for analyzing the load transfer of a transformer station N-1 according to claim 4, wherein when other operating transformers in a transformer station including the transformer to be shutdown cannot supply all loads in the transformer station, after transferring loads exceeding the total capacity of the other operating transformers in the transformer station to other transformer stations, further comprising:
if each running transformer in the feeder line group can not supply power to the load on the feeder line where the transformer to be shut down is located, the transformer to be shut down is subjected to power-off processing, or a connection relation with other substations is established through an automatic connection switch.
8. A transformer station transformer N-1 load transfer analysis device, characterized by comprising:
the feeder line group analysis module is used for carrying out distribution network wiring mode analysis through an algorithm according to a distribution network feeder line description CIMXML file to obtain a feeder line group, wherein the feeder line group is a distribution network line with direct or indirect connection;
the feeder segment matching module is used for determining a plurality of feeder segments in the feeder group and analyzing distribution transformer load values of the feeder segments, wherein the distribution transformer load values are obtained according to a historical distribution transformer day maximum load curve;
and the load transfer analysis module is used for analyzing whether the transfer requirement of the transformer N-1 is met after the transfer load of the transformer to be stopped is met according to the distribution load values of the feeder line groups and the feeder line sections.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method for load transfer analysis of a substation transformer N-1 according to any of claims 1-7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements a method for load transfer analysis of a substation transformer N-1 according to any one of claims 1-7.
CN202310416781.1A 2023-04-18 2023-04-18 Method, device, equipment and medium for analyzing N-1 load transfer of transformer substation Pending CN116247670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310416781.1A CN116247670A (en) 2023-04-18 2023-04-18 Method, device, equipment and medium for analyzing N-1 load transfer of transformer substation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310416781.1A CN116247670A (en) 2023-04-18 2023-04-18 Method, device, equipment and medium for analyzing N-1 load transfer of transformer substation

Publications (1)

Publication Number Publication Date
CN116247670A true CN116247670A (en) 2023-06-09

Family

ID=86635210

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310416781.1A Pending CN116247670A (en) 2023-04-18 2023-04-18 Method, device, equipment and medium for analyzing N-1 load transfer of transformer substation

Country Status (1)

Country Link
CN (1) CN116247670A (en)

Similar Documents

Publication Publication Date Title
CN115617579A (en) Power utilization information control platform and control method for power distribution equipment
CN111130116B (en) Scheduling operation power flow checking method based on key topology change item identification
CN117424224A (en) Power failure plan balance optimization method, device, equipment and storage medium
CN115115133B (en) Parallel operation control method and device of generator and computer program product
CN116247670A (en) Method, device, equipment and medium for analyzing N-1 load transfer of transformer substation
CN116799953A (en) Equipment abnormality identification method, device and equipment based on power grid dispatching monitoring
CN115494347A (en) Method, device, equipment and storage medium for confirming abnormal power utilization users in transformer area
CN116132470A (en) ATS system and processing method based on secure cloud platform
CN115000949A (en) Power distribution network modeling method, device, equipment and storage medium
CN115407150A (en) System, method, meter and medium for determining use condition of protective pressing plate
CN114915558B (en) Distribution network mixed operation control method and device, electronic equipment and storage medium
CN118154351A (en) Method, device, equipment and storage medium for generating contact switch list
CN115689050A (en) Distribution automatic terminal distribution optimization method, device, equipment and medium
US20230092978A1 (en) Resource Tapping Method, Resource Tapping Apparatus and Electronic Device
CN117200444A (en) Main distribution network model splicing method, device, equipment and storage medium
CN116231666A (en) Power grid electrical switch cluster control method and device, electronic equipment and storage medium
CN115036919A (en) Method, device and equipment for adjusting ring network load and storage medium
CN115425754A (en) Power distribution network scheduling method, device, equipment and storage medium
CN115391376A (en) Power failure query method and device, electronic equipment and storage medium
CN117434382A (en) Line open-phase position determining method, device, equipment and storage medium
CN117113602A (en) Method and device for constructing feeder group ring network diagram, electronic equipment and storage medium
CN116015359A (en) Data processing system, data processing method, device, equipment and storage medium
CN116599004A (en) Distribution line control method and control device, electronic equipment and storage medium
CN115395658A (en) Power distribution network fault disposal benefit evaluation method, device, equipment and medium
CN117252444A (en) Power distribution network planning method and device, electronic equipment and storage medium

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination