CN116093940B - Distribution network line interconnection switch distribution point selection method, distribution network line interconnection switch distribution point selection device and storage medium - Google Patents

Distribution network line interconnection switch distribution point selection method, distribution network line interconnection switch distribution point selection device and storage medium Download PDF

Info

Publication number
CN116093940B
CN116093940B CN202310373982.8A CN202310373982A CN116093940B CN 116093940 B CN116093940 B CN 116093940B CN 202310373982 A CN202310373982 A CN 202310373982A CN 116093940 B CN116093940 B CN 116093940B
Authority
CN
China
Prior art keywords
target
line
distribution
scheme
redundancy
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.)
Active
Application number
CN202310373982.8A
Other languages
Chinese (zh)
Other versions
CN116093940A (en
Inventor
朱延廷
李响
陈锦荣
李高明
欧阳卫年
张文骏
曾晓丹
岳朝辉
彭飞进
谭振鹏
郭为斌
车磊
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.)
Foshan Power Supply Bureau of Guangdong Power Grid Corp
Original Assignee
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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 Foshan Power Supply Bureau of Guangdong Power Grid Corp filed Critical Foshan Power Supply Bureau of Guangdong Power Grid Corp
Priority to CN202310373982.8A priority Critical patent/CN116093940B/en
Publication of CN116093940A publication Critical patent/CN116093940A/en
Application granted granted Critical
Publication of CN116093940B publication Critical patent/CN116093940B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/18—Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00—Details relating to the application field
    • G06F2113/04—Power grid distribution networks
    • 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]
    • 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

Abstract

The invention relates to the technical field of power distribution network optimization, and discloses a distribution network line interconnection switch distribution point selection method, a distribution network line interconnection switch distribution point selection device and a storage medium. The method comprises the steps of determining a target power supply scheme set according to a trunk line set of a target transformer substation; taking a tower and a cable tapping point as target endpoints, taking a line segment between two adjacent target endpoints as a corresponding target line segment, and calculating load redundancy data corresponding to different schemes in the power supply scheme set to determine a distribution point selection range of a tie switch on a distribution network line; carrying out point distribution in the point distribution selection range according to the number of the target tie switches to obtain each alternative point distribution scheme; calculating the minimum redundancy of lines on different feeder switch sides under each alternative point distribution scheme, calculating the weight value of the corresponding alternative point distribution scheme according to the obtained minimum redundancy set of the lines, and selecting the alternative point distribution scheme with the maximum weight value as the optimal point distribution scheme. The invention can lead the distribution of the interconnection switches to be more reasonable and effectively improve the power supply reliability.

Description

Distribution network line interconnection switch distribution point selection method, distribution network line interconnection switch distribution point selection device and storage medium
Technical Field
The invention relates to the technical field of power distribution network optimization, in particular to a distribution network line interconnection switch distribution point selection method, a distribution network line interconnection switch distribution point selection device and a storage medium.
Background
In the prior art, the distribution point of the tie switch is generally designated by people at the initial stage of planning and construction of a distribution network line, and systematic analysis is not performed according to the load conditions at two sides of the tie switch, so that the tie switch is easy to be distributed unreasonably, and the situation that the load of a transfer supply at the side of a fault line cannot be born under the daily load of a non-fault line or the load of the transfer supply cannot be born due to the insufficient bearing capacity of the tie switch is caused at two sides of the tie switch, thereby influencing the power supply reliability.
Disclosure of Invention
The invention provides a distribution network line tie-down switch point selection method, a distribution network line tie-down switch point selection device and a storage medium, which solve the technical problems that the distribution network line tie-down switch point selection scheme is manually specified, systematic analysis is not performed according to the load conditions on two sides of a tie-down switch, and the power supply reliability is easily affected due to unreasonable tie-down switch distribution.
The first aspect of the present invention provides a distribution network line tie-down switch point selection method, which includes:
determining a trunk set and the number of target tie switches of a target substation;
Determining power supply schemes in different power supply directions according to the trunk line set to obtain a target power supply scheme set;
taking a tower and a cable tapping point as target endpoints, taking a line segment between two adjacent target endpoints as a corresponding target line segment, and calculating load redundancy data corresponding to different power supply schemes in the target power supply scheme set; the load redundancy data comprise load redundancy amounts of all target line segments when different target endpoints are feeder line ends;
determining a power supply range of a feeder switch serving as an upstream in a corresponding power supply scheme according to the load redundancy data;
determining a distribution point selection range of the interconnection switch on the distribution network line according to each power supply range;
performing point distribution in the determined point distribution selection range according to the number of the target tie switches to obtain alternative point distribution schemes;
calculating the minimum redundancy of the lines on different feeder switch sides under each alternative point distribution scheme to obtain a minimum redundancy set of the lines corresponding to each alternative point distribution scheme;
calculating the weight value of the corresponding alternative point distribution scheme according to the minimum redundancy amount set of the line;
and selecting an alternative point distribution scheme with the maximum weight value from the alternative point distribution schemes as an optimal point distribution scheme of the contact switch in the target transformer substation.
According to an implementation manner of the first aspect of the present invention, the calculating load redundancy data corresponding to different power supply schemes in the target power supply scheme set includes:
the load redundancy of each target line segment is calculated according to the following formula:
Figure SMS_1
；
in the method, in the process of the invention,
Figure SMS_2
representing a target line segment->
Figure SMS_3
Load redundancy of->
Figure SMS_4
For the target line segment->
Figure SMS_5
Rated current of->
Figure SMS_6
Is the object ofLine segment->
Figure SMS_7
Is set in the above-described state.
According to one implementation manner of the first aspect of the present invention, the determining, according to the load redundancy data, a power-available range of a feeder switch as an upstream in a corresponding power supply scheme includes:
sequentially increasing the identification numbers of all target endpoints from an upstream feeder switch to a downstream feeder switch, and determining the identification number of the target endpoint meeting the load redundancy condition under the same power supply scheme as an alternative identification number according to the load redundancy data; the load redundancy condition is that the load redundancy quantity of any target line segment is smaller than a preset load redundancy quantity threshold when the corresponding target endpoint is used as the feeder end;
and selecting the largest alternative identification number from the alternative identification numbers as a target identification number, and taking a value obtained by subtracting 1 from the target identification number as an identification number capable of supplying power to a target endpoint to obtain a power-capable range serving as an upstream feeder switch in a corresponding power supply scheme.
According to one possible implementation manner of the first aspect of the present invention, the preset load redundancy amount threshold is 0.
According to one implementation manner of the first aspect of the present invention, the calculating the minimum redundancy of the lines on different feeder switch sides under each alternative point distribution scheme, to obtain a minimum redundancy set of the lines corresponding to each alternative point distribution scheme includes:
and taking the point distribution position of the tie switch in the alternative point distribution scheme as a target point distribution position, calculating the load redundancy amount of each target line segment between the feeder switch and the target point distribution position, and taking the minimum value of the load redundancy amount as the line minimum redundancy amount at the corresponding feeder switch side in the obtained load redundancy amount calculation result.
According to one implementation manner of the first aspect of the present invention, the calculating the weight value of the corresponding alternative point placement scheme according to the line minimum redundancy amount set includes:
judging whether the minimum redundancy of each circuit of the circuit minimum redundancy set is larger than 0;
if the minimum redundancy of each line of the line minimum redundancy set is larger than 0, selecting a corresponding preset weight value calculation formula to calculate the weight value of a corresponding alternative point distribution scheme according to the number of the main lines in the main line set;
If the minimum redundancy of each line of the minimum redundancy set of the lines is not more than 0, subtracting 1 from the number of the target tie switches, reforming the minimum redundancy set of the lines, and returning to judge whether the minimum redundancy of each line of the minimum redundancy set of the lines is more than 0 or not until the iteration stop condition is met; the iteration stop condition is that the minimum redundancy of each line in the current line minimum redundancy set is more than 0, or the number of target tie switches is reduced to 0;
if the number of the target interconnection switches is reduced to 0, the minimum redundancy of each line in the current line minimum redundancy set cannot be met, and information for prompting that the trunk set of the target substation cannot be effectively connected is output.
According to one implementation manner of the first aspect of the present invention, the selecting a corresponding preset weight value calculation formula according to the number of trunks in the trunk set to calculate a weight value of a corresponding alternative point distribution scheme includes:
when the number of the trunks in the trunk line set is 1, the number of the minimum redundancy line set of the corresponding alternative point distribution scheme is 2, and the weight value of the corresponding alternative point distribution scheme is calculated according to the following formula:
Figure SMS_8
；
in the method, in the process of the invention,
Figure SMS_9
Representing an alternative point placement scheme->
Figure SMS_12
Weight value of->
Figure SMS_16
For alternative point arrangement scheme->
Figure SMS_11
Corresponding line minimum redundancy set, +.>
Figure SMS_14
For alternative point arrangement scheme->
Figure SMS_15
The 1 st line minimum redundancy in the corresponding line minimum redundancy set,/->
Figure SMS_17
For alternative point arrangement scheme->
Figure SMS_10
2 nd line minimum redundancy in the corresponding line minimum redundancy set,/->
Figure SMS_13
The weight value is preset;
when the number of the trunk lines in the trunk line set is larger than 1, calculating the weight value of the corresponding alternative point distribution scheme according to the following formula:
Figure SMS_18
；/>
in the method, in the process of the invention,
Figure SMS_21
representing an alternative point placement scheme->
Figure SMS_24
Weight value of->
Figure SMS_25
For alternative point arrangement scheme->
Figure SMS_19
Corresponding line minimum redundancy set, +.>
Figure SMS_22
As an alternativePoint arrangement scheme->
Figure SMS_26
The corresponding line minimum redundancy amount set +.>
Figure SMS_27
Minimum redundancy of individual lines, +.>
Figure SMS_20
For alternative point arrangement scheme->
Figure SMS_23
Variance of the corresponding line minimum redundancy set.
The second aspect of the present invention provides a distribution network line interconnection switch point selection device, including:
the first determining module is used for determining the trunk set of the target substation and the number of the target tie switches;
the second determining module is used for determining power supply schemes in different power supply directions according to the trunk line set to obtain a target power supply scheme set;
The first calculation module is used for taking a pole tower and a cable tapping point as target endpoints, taking a line segment between two adjacent target endpoints as a corresponding target line segment, and calculating load redundancy data corresponding to different power supply schemes in the target power supply scheme set; the load redundancy data comprise load redundancy amounts of all target line segments when different target endpoints are feeder line ends;
a third determining module, configured to determine a power-available range of the feeder switch serving as an upstream in the corresponding power supply scheme according to the load redundancy data;
a fourth determining module, configured to determine a distribution selection range of the tie switch on the distribution network line according to each of the power-available ranges;
the point setting module is used for setting points in the determined point setting selection range according to the number of the target tie switches to obtain each alternative point setting scheme;
the second calculation module is used for calculating the minimum redundancy of the lines on the different feeder switch sides under each alternative point distribution scheme to obtain a minimum redundancy set of the lines corresponding to each alternative point distribution scheme;
the third calculation module is used for calculating the weight value of the corresponding alternative point distribution scheme according to the line minimum redundancy amount set;
and the selecting module is used for selecting the alternative point distribution scheme with the maximum weight value from the alternative point distribution schemes as the optimal point distribution scheme of the contact switch in the target transformer substation.
According to one manner in which the second aspect of the present invention can be implemented, the first computing module includes:
a first calculation unit for calculating the load redundancy of each target line segment according to the following formula:
Figure SMS_28
；
in the method, in the process of the invention,
Figure SMS_29
representing a target line segment->
Figure SMS_30
Load redundancy of->
Figure SMS_31
For the target line segment->
Figure SMS_32
Rated current of->
Figure SMS_33
For the target line segment->
Figure SMS_34
Is set in the above-described state.
According to one implementation manner of the second aspect of the present invention, the third determining module includes:
a first determining unit, configured to sequentially increase the identification numbers of the target endpoints from the upstream feeder switch to the downstream feeder switch, and determine, according to the load redundancy data, the identification number of the target endpoint satisfying the load redundancy condition under the same power supply scheme as an alternative identification number; the load redundancy condition is that the load redundancy quantity of any target line segment is smaller than a preset load redundancy quantity threshold when the corresponding target endpoint is used as the feeder end;
and the power-supply range analysis unit is used for selecting the largest alternative identification number from the alternative identification numbers as a target identification number, taking a value obtained by subtracting 1 from the target identification number as the identification number capable of supplying power to a target endpoint, and obtaining the power-supply range serving as the upstream feeder switch in the corresponding power supply scheme.
According to one possible implementation manner of the second aspect of the present invention, the preset load redundancy amount threshold is 0.
According to one manner in which the second aspect of the present invention can be implemented, the second computing module includes:
the second calculation unit is used for calculating the load redundancy amount of each target line segment between the feeder switch and the target point distribution position by taking the point distribution position of the tie switch in the alternative point distribution scheme as the target point distribution position, and taking the minimum value of the load redundancy amount as the line minimum redundancy amount at the corresponding feeder switch side in the obtained load redundancy amount calculation result.
According to one manner in which the second aspect of the present invention can be implemented, the third computing module includes:
the judging unit is used for judging whether the minimum redundancy of each circuit of the circuit minimum redundancy set is larger than 0;
a third calculation unit, configured to select a corresponding preset weight value calculation formula according to the number of trunks in the trunk set, and calculate a weight value of a corresponding alternative point distribution scheme if the minimum redundancy of each line in the line minimum redundancy set is greater than 0;
a value unit, configured to, if the minimum redundancy of each line in the minimum redundancy set of lines is not greater than 0, subtract 1 from the number of target tie switches, reform the minimum redundancy set of lines, and return to the determining unit until an iteration stop condition is satisfied; the iteration stop condition is that the minimum redundancy of each line in the current line minimum redundancy set is more than 0, or the number of target tie switches is reduced to 0;
And the output unit is used for outputting information for prompting that the trunk line set of the target transformer substation cannot be effectively connected if the minimum redundancy quantity of each line of the current line minimum redundancy quantity set is still not more than 0 when the number of the target connection switches is reduced to 0.
According to one possible implementation manner of the second aspect of the present invention, the third computing unit is specifically configured to:
when the number of the trunks in the trunk line set is 1, the number of the minimum redundancy line set of the corresponding alternative point distribution scheme is 2, and the weight value of the corresponding alternative point distribution scheme is calculated according to the following formula:
Figure SMS_35
；
in the method, in the process of the invention,
Figure SMS_36
representing an alternative point placement scheme->
Figure SMS_40
Weight value of->
Figure SMS_43
For alternative point arrangement scheme->
Figure SMS_37
Corresponding line minimum redundancy set, +.>
Figure SMS_39
For alternative point arrangement scheme->
Figure SMS_42
The 1 st line minimum redundancy in the corresponding line minimum redundancy set,/->
Figure SMS_44
For alternative point arrangement scheme->
Figure SMS_38
2 nd line minimum redundancy in the corresponding line minimum redundancy set,/->
Figure SMS_41
The weight value is preset;
when the number of the trunk lines in the trunk line set is larger than 1, calculating the weight value of the corresponding alternative point distribution scheme according to the following formula:
Figure SMS_45
；
in the method, in the process of the invention,
Figure SMS_47
representing an alternative point placement scheme->
Figure SMS_50
Weight value of->
Figure SMS_53
For alternative point arrangement scheme- >
Figure SMS_46
Corresponding line minimum redundancy set, +.>
Figure SMS_49
For alternative point arrangement scheme->
Figure SMS_52
The corresponding line minimum redundancy amount set +.>
Figure SMS_54
Minimum redundancy of individual lines, +.>
Figure SMS_48
For alternative point arrangement scheme->
Figure SMS_51
Variance of the corresponding line minimum redundancy set.
The third aspect of the present invention provides a distribution network line tie switch point selection device, comprising:
a memory for storing instructions; the instruction is used for realizing the distribution network line interconnection switch point selection method according to the mode which can be realized by any one of the above steps;
and the processor is used for executing the instructions in the memory.
A fourth aspect of the present invention is a computer readable storage medium, where a computer program is stored, where the computer program when executed by a processor implements a distribution network line contact switch point selection method according to any one of the above modes.
From the above technical scheme, the invention has the following advantages:
the method comprises the steps of determining a trunk set and the number of target tie switches of a target substation; determining power supply schemes in different power supply directions according to the trunk line set to obtain a target power supply scheme set; taking a tower and a cable tapping point as target endpoints, taking a line segment between two adjacent target endpoints as a corresponding target line segment, and calculating load redundancy data corresponding to different power supply schemes in the target power supply scheme set; the load redundancy data comprise load redundancy amounts of all target line segments when different target endpoints are feeder line ends; determining a power supply range of a feeder switch serving as an upstream in a corresponding power supply scheme according to the load redundancy data; determining a distribution point selection range of the interconnection switch on the distribution network line according to each power supply range; performing point distribution in the determined point distribution selection range according to the number of the target tie switches to obtain alternative point distribution schemes; calculating the minimum redundancy of the lines on different feeder switch sides under each alternative point distribution scheme to obtain a minimum redundancy set of the lines corresponding to each alternative point distribution scheme; calculating the weight value of the corresponding alternative point distribution scheme according to the minimum redundancy amount set of the line; selecting an alternative point distribution scheme with the maximum weight value from the alternative point distribution schemes as an optimal point distribution scheme of a contact switch in the target transformer substation; the invention carries out systematic analysis based on the load conditions at the two sides of the interconnection switch, provides a relatively balanced interconnection point selection method, ensures that the distribution of the interconnection switch is more reasonable, and effectively improves the power supply reliability.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a flowchart of a distribution network line tie-down point selection method according to an alternative embodiment of the present invention;
fig. 2 is a schematic diagram of a distribution network according to an alternative embodiment of the present invention;
fig. 3 is a schematic diagram of a distribution network according to another alternative embodiment of the present invention;
fig. 4 is a block diagram illustrating the structural connection of a distribution network line interconnection switch point selection device according to an alternative embodiment of the present invention.
Reference numerals:
fig. 2 and 3:
10kV feeder switches of K1, K2 and K3-substations; z11, Z12, Z62, Z61, Z21, Z22, Z31, Z32, Z41, Z42, Z51, Z52, F1, F2, F3, F4, F5, F7, F8, F9, F10, F11, F12, F13, F14, F15-towers (or cable tapping points); f6 and Z13 are connected with the pole tower;
In fig. 4:
1-a first determination module; 2-a second determination module; 3-a first computing module; 4-a third determination module; 5-a fourth determination module; 6-a point distribution module; 7-a second calculation module; 8-a third calculation module; 9-selecting a module.
Detailed Description
The embodiment of the invention provides a distribution network line tie-down switch point selection method, a distribution network line tie-down switch point selection device and a storage medium, which are used for solving the technical problems that the distribution network line tie-down switch point selection scheme is manually specified, systematic analysis is not performed according to the load conditions on two sides of a tie-down switch, and the power supply reliability is easily affected due to unreasonable tie-down switch distribution.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a distribution network line interconnection switch distribution point selection method.
Referring to fig. 1, fig. 1 is a flowchart illustrating a distribution network line interconnection switch point selection method according to an embodiment of the present invention.
The distribution network line interconnection switch distribution point selection method provided by the embodiment of the invention comprises the steps S1-S9.
And step S1, determining a trunk set of the target substation and the number of target tie switches.
The target transformer substation is a transformer substation needing distribution network line interconnection switch distribution selection.
When the trunk line set of the target transformer substation is determined, starting from the feeder line switch at the beginning of the transformer substation, and assuming that all the switches are in a combined position according to the network topology of the transformer substation, if the number of other found feeder line switches is N, the number of the trunk lines is N, so that the N trunk lines construct the trunk line set.
The number of the target tie switches is the number of tie switches which are required to be distributed in the distribution network line of the target transformer substation by manual specification, the number can be set according to actual conditions, and the setting range of the number of the tie switches cannot exceed the number of the trunk lines. For example, when the number of trunks is N, a corresponding number may be designated between 1 and N as the target number of tie switches.
And step S2, determining power supply schemes in different power supply directions according to the trunk line set to obtain a target power supply scheme set.
And for each trunk line, taking each feeder line switch on the trunk line as an upstream to obtain a power supply scheme in a corresponding power supply direction.
FIG. 2 is a schematic diagram of a distribution network according to an alternative embodiment of the present invention; fig. 3 shows a schematic diagram of a distribution network according to another alternative embodiment of the present invention. In fig. 2-3, the distribution network line comprises 3 10kV feeder lines, namely a 10kV feeder switch K1 of a transformer substation, a 10kV feeder switch K2 of the transformer substation and a 10kV feeder switch K3 of the transformer substation. The solid diamond points are towers (or cable tapping points), namely each solid diamond point Z11, Z12, Z62, Z61, Z21, Z22, Z31, Z32, Z41, Z42, Z51, Z52, F1, F2, F3, F4, F5, F7, F8, F9, F10, F11, F12, F13, F14 and F15 are target towers, and the hollow diamond points are connecting towers among feeder lines, namely the hollow diamond points F6 and Z13 are connecting towers. There is a branch 2 user 1 under the target tower Z21, a branch 2 user 2 and a branch 2 user n under the target tower Z22, a branch 3 user 1 under the target tower Z31, a branch 3 user 2 and a branch 3 user n under the target tower Z32, a branch 4 user 1 under the target tower Z41, a branch 4 user 2 and a branch 4 user n under the target tower Z42, a branch 5 user 1 under the target tower Z51, a branch 5 user 2 and a branch 5 user n under the target tower Z32, a branch 1 user 2 under the target tower Z12, a branch 6 user 2 under the target tower Z62, a branch 6 user 1 under the target tower Z61, and a branch 1 user 1 under the target tower Z11.
As an example, as shown in fig. 2, the distribution network line includes a trunk line between a 10kV feeder switch K1 of a substation and a 10kV feeder switch K2 of the substation, each diamond point is a tower (or a cable tapping point), and a plurality of towers (or cable tapping points) are connected with branch users. The method comprises the steps that a 10kV feeder switch K1 of a transformer substation is arranged at the upstream, a 10kV feeder switch K2 of the transformer substation is arranged at the downstream, and a power supply scheme with a power supply direction from the 10kV feeder switch K1 of the transformer substation to the 10kV feeder switch K2 of the transformer substation is obtained; the method comprises the steps that a 10kV feeder switch K2 of a transformer substation is arranged at the upstream, a 10kV feeder switch K1 of the transformer substation is arranged at the downstream, and a power supply scheme with a power supply direction from the 10kV feeder switch K2 of the transformer substation to the 10kV feeder switch K1 of the transformer substation is obtained; finally, a target power supply scheme set formed by the two power supply schemes is obtained.
As yet another example, as shown in fig. 3, the distribution network line includes two trunks, which are a trunk between the substation 10kV feeder switch K1 and the substation 10kV feeder switch K2, and a trunk between the substation 10kV feeder switch K1 and the substation 10kV feeder switch K3, respectively. Each diamond point is a tower (or a cable tapping point), and a plurality of towers (or cable tapping points) are connected with branch users. The method comprises the steps that a 10kV feeder switch K2 of a transformer substation is arranged at the upstream, a 10kV feeder switch K1 of the transformer substation is arranged at the downstream, and a power supply scheme with a power supply direction from the 10kV feeder switch K2 of the transformer substation to the 10kV feeder switch K1 of the transformer substation is obtained; the method comprises the steps that a 10kV feeder switch K3 of a transformer substation is arranged at the upstream, a 10kV feeder switch K1 of the transformer substation is arranged at the downstream, and a power supply scheme with a power supply direction from the 10kV feeder switch K3 of the transformer substation to the 10kV feeder switch K1 of the transformer substation is obtained; the method comprises the steps that a 10kV feeder switch K1 of a transformer substation is arranged at the upstream, a 10kV feeder switch K2 of the transformer substation, a 10kV feeder switch K3 of the transformer substation and a tail end tower F15 are arranged at the downstream, and a power supply scheme with power supply directions from the 10kV feeder switch K1 of the transformer substation to the 10kV feeder switch K2 of the transformer substation, the 10kV feeder switch K3 of the transformer substation and the tail end tower F15 is obtained; and finally obtaining a target power supply scheme set formed by the three power supply schemes.
And S3, taking the tower and the cable tapping point as target endpoints, taking a line segment between two adjacent target endpoints as a corresponding target line segment, and calculating load redundancy data corresponding to different power supply schemes in the target power supply scheme set.
The load redundancy data comprise load redundancy amounts of all target line segments when different target endpoints are feeder line ends.
In one implementation manner, the calculating load redundancy data corresponding to different power supply schemes in the target power supply scheme set includes:
the load redundancy of each target line segment is calculated according to the following formula:
Figure SMS_55
；
in the method, in the process of the invention,
Figure SMS_56
representing a target line segment->
Figure SMS_57
Load redundancy of->
Figure SMS_58
For the target line segment->
Figure SMS_59
Rated current of->
Figure SMS_60
For the target line segment->
Figure SMS_61
Is set in the above-described state.
The method for calculating the load current of the target line segment can refer to the prior art. For target line segments
Figure SMS_62
The load current is +.>
Figure SMS_67
Rated current +.>
Figure SMS_72
Let branch->
Figure SMS_65
User->
Figure SMS_66
Is +.>
Figure SMS_71
As an example, as shown in FIG. 2, the load current of the segment between the target terminals F5 and F6 is +.>
Figure SMS_73
Load current of branch 4 user 1 is +.>
Figure SMS_64
Load current->
Figure SMS_68
Is a tower->
Figure SMS_70
And->
Figure SMS_74
The sum of the user load current of each branch and the load current of the downstream adjacent line segment, wherein the target endpoint +. >
Figure SMS_63
And->
Figure SMS_69
The branch load is counted into the upstream line segment, the target endpoint F4 is the upstream and the target endpoint F5 is the downstream, and if the line end is the target endpoint F6, then:
Figure SMS_75
；
in the method, in the process of the invention,
Figure SMS_76
load current for the line segment between the target terminals F4 and F5, +.>
Figure SMS_77
For the load current at the target endpoint F5, +.>
Figure SMS_78
Load current for the line segment between the target endpoint F5 and branch 4 user 1, +.>
Figure SMS_79
Load current for the line segment between branch 4 user 1 and branch 4 user 2, +.>
Figure SMS_80
Load current for branch 4 user 2, +.>
Figure SMS_81
User +.>
Figure SMS_82
Is set in the above-described state;
let the target endpoint F4 be downstream and the target endpoint F5 be upstream, assuming that the line end is the target endpoint F6:
Figure SMS_83
；
in the method, in the process of the invention,
Figure SMS_86
for the load current at the target endpoint F4, +.>
Figure SMS_87
Load current for the line segment between the target terminals F3 and F4, < >>
Figure SMS_90
Load current for line segment between target endpoint F4 and branch 3 user 1, +.>
Figure SMS_84
Load current for the line segment between branch 3 user 1 and branch 3 user 2, +.>
Figure SMS_88
Load current for branch 3 user 1, +.>
Figure SMS_89
Load current for branch 3 user 2, +.>
Figure SMS_91
User +.>
Figure SMS_85
Is set in the above-described state.
And S4, determining the powerable range of the feeder switch serving as the upstream in the corresponding power supply scheme according to the load redundancy data.
In one implementation manner, the determining the powerable range of the feeder switch as the upstream in the corresponding power supply scheme according to the load redundancy data includes:
Sequentially increasing the identification numbers of all target endpoints from an upstream feeder switch to a downstream feeder switch, and determining the identification number of the target endpoint meeting the load redundancy condition under the same power supply scheme as an alternative identification number according to the load redundancy data; the load redundancy condition is that the load redundancy quantity of any target line segment is smaller than a preset load redundancy quantity threshold when the corresponding target endpoint is used as the feeder end;
and selecting the largest alternative identification number from the alternative identification numbers as a target identification number, and taking a value obtained by subtracting 1 from the target identification number as an identification number capable of supplying power to a target endpoint to obtain a power-capable range serving as an upstream feeder switch in a corresponding power supply scheme.
In one implementation, the pre-load redundancy amount threshold is 0.
As an example, when calculating the powerable range of the feeder switch as upstream in the corresponding power scheme for the distribution network line shown in fig. 2, specific execution is performed:
aiming at a power supply scheme with power supply directions from a 10kV feeder switch K1 of a transformer substation to a 10kV feeder switch K2 of the transformer substation, the identification numbers of target endpoints are increased sequentially from the 10kV feeder switch K1 of the transformer substation to the 10kV feeder switch K2 of the transformer substation, and each target endpoint is calculated to be each line segment under the feeder terminal
Figure SMS_92
Is arbitrary given that the terminal is at the target endpoint M
Figure SMS_93
Then the substation 10kV feeder switch K1 can supply power to the M-1 target endpoint;
aiming at a power supply scheme with a power supply direction from a 10kV feeder switch K2 of a transformer substation to a 10kV feeder switch K1 of the transformer substation, the identification numbers of target endpoints are increased sequentially from the 10kV feeder switch K2 of the transformer substation to the 10kV feeder switch K1 of the transformer substation, and each target endpoint is calculated to be each line segment under the feeder terminal
Figure SMS_94
Values of (2)Assuming that the terminal is at the tower N, arbitrary +.>
Figure SMS_95
Then the substation 10kV feeder switch K2 may supply power to the No. N-1 tower.
As another example, when calculating the powerable range of the feeder switch as the upstream in the corresponding power scheme for the distribution network line shown in fig. 3, specific execution is performed:
aiming at a power supply scheme with a power supply direction from a 10kV feeder switch K2 of a transformer substation to a 10kV feeder switch K1 of the transformer substation, the identification numbers of target endpoints are increased sequentially from the 10kV feeder switch K2 of the transformer substation to the 10kV feeder switch K1 of the transformer substation, and each target endpoint is calculated to be each line segment under the feeder terminal
Figure SMS_96
Is given by the value of (1) assuming that the terminal is at the target terminal N, optionally +.>
Figure SMS_97
Then the 10kV feeder switch K1 of the transformer substation can supply power to the N-1 target endpoint;
aiming at a power supply scheme with a power supply direction from a 10kV feeder switch K3 of a transformer substation to a 10kV feeder switch K1 of the transformer substation, the identification numbers of target endpoints are increased sequentially from the 10kV feeder switch K3 of the transformer substation to the 10kV feeder switch K1 of the transformer substation, and each target endpoint is calculated to be each line segment under the feeder terminal
Figure SMS_98
Is given by the value of (1) assuming that the terminal is at the target terminal Q, optionally +.>
Figure SMS_99
Then the substation 10kV feeder switch K3 can supply power to a Q-1 target endpoint;
aiming at a power supply scheme with power supply directions from a 10kV feeder switch K1 of a transformer substation to a 10kV feeder switch K2 of the transformer substation, a 10kV feeder switch K3 of the transformer substation and a tail end tower F15, each tower is calculated to be each line segment under the tail end of a feeder
Figure SMS_100
Values of (2)Assuming that the terminal 1 is on the tower N-1 and the terminal 2 is on the tower M1, optionally +.>
Figure SMS_101
The method comprises the steps of carrying out a first treatment on the surface of the Terminal 1 on Q-1 tower and terminal 2 on M2 tower, optionally +.>
Figure SMS_102
Then the 10kV feeder switch K1 of the transformer substation can supply power to the M1-1 pole towers and the M2-1 pole towers.
And S5, determining the distribution point selection range of the interconnection switch on the distribution network line according to each power supply range.
For example, for the distribution network line shown in fig. 2, when the substation 10kV feeder switch K1 can supply power to the M-1 target endpoint and the substation 10kV feeder switch K2 can supply power to the N-1 target endpoint, the distribution selection range of the contact switch on the distribution network line is the range between the M-1 target endpoint and the N-1 target endpoint. For the distribution network line shown in fig. 3, the substation 10kV feeder switch K1 can supply power to the N-1 target endpoint, the substation 10kV feeder switch K3 can supply power to the Q-1 target endpoint, and when the substation 10kV feeder switch K1 can supply power to the M1-1 and M2-1 towers, the distribution point selection range of the contact switch on the distribution network line is as follows: between the M1-1 target endpoint and the Q-1 target endpoint, and between the M2-1 target endpoint and the N-1 target endpoint.
It should be noted that, because the identification numbers of the same target endpoint under different power supply schemes are different, when the distribution selection range of the tie switch on the distribution network line is determined according to each power supply range, the target endpoint of the power supply range can be marked, and the target endpoint of the mark number is re-marked by adopting the same identification number setting standard, so as to obtain the distribution selection range of the tie switch on the distribution network line.
And S6, carrying out point distribution in the determined point distribution selection range according to the number of the target interconnection switches to obtain each alternative point distribution scheme.
And S7, calculating the minimum redundancy of the lines on different feeder switch sides under each alternative point distribution scheme to obtain a minimum redundancy set of the lines corresponding to each alternative point distribution scheme.
In one implementation manner, the calculating the minimum redundancy of the lines on different feeder switch sides under each alternative point distribution scheme to obtain a minimum redundancy set of the lines corresponding to each alternative point distribution scheme includes:
and taking the point distribution position of the tie switch in the alternative point distribution scheme as a target point distribution position, calculating the load redundancy amount of each target line segment between the feeder switch and the target point distribution position, and taking the minimum value of the load redundancy amount as the line minimum redundancy amount at the corresponding feeder switch side in the obtained load redundancy amount calculation result.
And S8, calculating the weight value of the corresponding alternative point distribution scheme according to the line minimum redundancy amount set.
In one implementation manner, the calculating the weight value of the corresponding alternative point placement scheme according to the line minimum redundancy amount set includes:
judging whether the minimum redundancy of each circuit of the circuit minimum redundancy set is larger than 0;
if the minimum redundancy of each line of the line minimum redundancy set is larger than 0, selecting a corresponding preset weight value calculation formula to calculate the weight value of a corresponding alternative point distribution scheme according to the number of the main lines in the main line set;
if the minimum redundancy of each line of the minimum redundancy set of the lines is not more than 0, subtracting 1 from the number of the target tie switches, reforming the minimum redundancy set of the lines, and returning to judge whether the minimum redundancy of each line of the minimum redundancy set of the lines is more than 0 or not until the iteration stop condition is met; the iteration stop condition is that the minimum redundancy of each line in the current line minimum redundancy set is more than 0, or the number of target tie switches is reduced to 0;
if the number of the target interconnection switches is reduced to 0, the minimum redundancy of each line in the current line minimum redundancy set cannot be met, and information for prompting that the trunk set of the target substation cannot be effectively connected is output.
In one implementation manner, the selecting a corresponding preset weight value calculation formula according to the number of the trunks in the trunk set to calculate the weight value of the corresponding alternative point distribution scheme includes:
when the number of the trunks in the trunk line set is 1, the number of the minimum redundancy line set of the corresponding alternative point distribution scheme is 2, and the weight value of the corresponding alternative point distribution scheme is calculated according to the following formula:
Figure SMS_103
；
in the method, in the process of the invention,
Figure SMS_105
representing an alternative point placement scheme->
Figure SMS_109
Weight value of->
Figure SMS_110
For alternative point arrangement scheme->
Figure SMS_106
Corresponding line minimum redundancy set, +.>
Figure SMS_108
For alternative point arrangement scheme->
Figure SMS_111
The 1 st line minimum redundancy in the corresponding line minimum redundancy set,/->
Figure SMS_112
For alternative point arrangement scheme->
Figure SMS_104
2 nd line minimum redundancy in the corresponding line minimum redundancy set,/->
Figure SMS_107
The weight value is preset;
when the number of the trunk lines in the trunk line set is larger than 1, calculating the weight value of the corresponding alternative point distribution scheme according to the following formula:
Figure SMS_113
；
in the method, in the process of the invention,
Figure SMS_115
representing an alternative point placement scheme->
Figure SMS_118
Weight value of->
Figure SMS_121
For alternative point arrangement scheme->
Figure SMS_116
Corresponding line minimum redundancy set, +.>
Figure SMS_117
For alternative point arrangement scheme->
Figure SMS_120
The corresponding line minimum redundancy amount set +.>
Figure SMS_122
Minimum redundancy of individual lines, +. >
Figure SMS_114
For alternative point arrangement scheme->
Figure SMS_119
Variance of the corresponding line minimum redundancy set.
And S9, selecting an alternative point distribution scheme with the maximum weight value from the alternative point distribution schemes as an optimal point distribution scheme of the contact switch in the target transformer substation.
As an example, if the number of tie switches n=2 is assumed when traversing each tower in the selection range, when the tie switches are in a certain tower P1, P2 in the selection range, the method is called a scheme P, and the line on the 10kV feeder switch K1 side of the substation is minimized
Figure SMS_123
，/>
Figure SMS_127
Between a 10kV feeder switch K1 of a transformer substation and towers p1 and p2, the minimum redundancy of a line at the side of the 10kV feeder switch K2 of the transformer substation is +.>
Figure SMS_131
，/>
Figure SMS_126
Between a 10kV feeder switch K2 of a transformer substation and p1 and p2, the minimum redundancy of a line at the K3 side of the 10kV feeder switch of the transformer substation is +.>
Figure SMS_129
，/>
Figure SMS_133
Between the substation 10kV feeder switches K3 and p1, p 2. When->
Figure SMS_135
、/>
Figure SMS_124
、/>
Figure SMS_130
Are all greater than 0, assuming that the weight value is +.>
Figure SMS_134
And when the power supply is maximum, the scheme P is the optimal scheme of the interconnection switch. When->
Figure SMS_136
、/>
Figure SMS_125
、/>
Figure SMS_128
Any value of the target tie switches is smaller than 0, the scheme p cannot meet the requirement of n=2 tie switches, the number of the target tie switches is reduced by 1, and at the moment, the target tie switches are used for switching the target tie switchesThe number of the lines is smaller than the number of the target feeder lines, a line minimum redundancy quantity set is formed again, whether the minimum redundancy quantity of each line is larger than 0 is judged again, and then a weight value is calculated >
Figure SMS_132
。When the number of the target interconnection switches is reduced to zero, the condition that the minimum redundancy of each line is larger than 0 cannot be met, the trunk sets of the target transformer substation cannot be effectively connected, and corresponding prompt information is output at the moment.
According to the embodiment of the invention, the systematic analysis is performed based on the load conditions at the two sides of the tie switch, and a relatively balanced tie point selection method is provided, so that the tie switch distribution is more reasonable, and the power supply reliability can be effectively improved.
The invention also provides a distribution network line interconnection switch point selection device which can be used for executing the distribution network line interconnection switch point selection method according to any one of the embodiments of the invention.
Referring to fig. 4, fig. 4 is a block diagram showing structural connection of a distribution network line interconnection switch point selection device according to an embodiment of the present invention.
The distribution network line interconnection switch point selection device provided by the embodiment of the invention comprises:
a first determining module 1, configured to determine a trunk set and a target tie switch number of a target substation;
a second determining module 2, configured to determine power supply schemes in different power supply directions according to the trunk line set, so as to obtain a target power supply scheme set;
The first calculating module 3 is configured to calculate load redundancy data corresponding to different power supply schemes in the target power supply scheme set by using a tower and a cable tapping point as target endpoints and a line segment between two adjacent target endpoints as a corresponding target line segment; the load redundancy data comprise load redundancy amounts of all target line segments when different target endpoints are feeder line ends;
a third determining module 4, configured to determine a powerable range of a feeder switch serving as an upstream in a corresponding power supply scheme according to the load redundancy data;
a fourth determining module 5, configured to determine a distribution selection range of the tie switch on the distribution network line according to each of the power-available ranges;
the point setting module 6 is used for setting points in the determined point setting selection range according to the number of the target tie switches to obtain various alternative point setting schemes;
the second calculating module 7 is configured to calculate the minimum redundancy of the lines on different feeder switch sides under each alternative point distribution scheme, so as to obtain a minimum redundancy set of the lines corresponding to each alternative point distribution scheme;
a third calculation module 8, configured to calculate a weight value of a corresponding alternative point distribution scheme according to the line minimum redundancy amount set;
And the selecting module 9 is used for selecting the alternative point distribution scheme with the maximum weight value from the alternative point distribution schemes as the optimal point distribution scheme of the contact switch in the target transformer substation.
In one possible implementation, the first computing module 3 includes:
a first calculation unit for calculating the load redundancy of each target line segment according to the following formula:
Figure SMS_137
；
in the method, in the process of the invention,
Figure SMS_138
representing a target line segment->
Figure SMS_139
Load redundancy of->
Figure SMS_140
For the target line segment->
Figure SMS_141
Rated current of->
Figure SMS_142
For the target line segment->
Figure SMS_143
Is set in the above-described state.
In one possible implementation, the third determining module 4 includes:
a first determining unit, configured to sequentially increase the identification numbers of the target endpoints from the upstream feeder switch to the downstream feeder switch, and determine, according to the load redundancy data, the identification number of the target endpoint satisfying the load redundancy condition under the same power supply scheme as an alternative identification number; the load redundancy condition is that the load redundancy quantity of any target line segment is smaller than a preset load redundancy quantity threshold when the corresponding target endpoint is used as the feeder end;
and the power-supply range analysis unit is used for selecting the largest alternative identification number from the alternative identification numbers as a target identification number, taking a value obtained by subtracting 1 from the target identification number as the identification number capable of supplying power to a target endpoint, and obtaining the power-supply range serving as the upstream feeder switch in the corresponding power supply scheme.
In one implementation, the pre-load redundancy amount threshold is 0.
In one possible implementation, the second computing module 7 includes:
the second calculation unit is used for calculating the load redundancy amount of each target line segment between the feeder switch and the target point distribution position by taking the point distribution position of the tie switch in the alternative point distribution scheme as the target point distribution position, and taking the minimum value of the load redundancy amount as the line minimum redundancy amount at the corresponding feeder switch side in the obtained load redundancy amount calculation result.
In one possible implementation, the third computing module 8 includes:
the judging unit is used for judging whether the minimum redundancy of each circuit of the circuit minimum redundancy set is larger than 0;
a third calculation unit, configured to select a corresponding preset weight value calculation formula according to the number of trunks in the trunk set, and calculate a weight value of a corresponding alternative point distribution scheme if the minimum redundancy of each line in the line minimum redundancy set is greater than 0;
a value unit, configured to, if the minimum redundancy of each line in the minimum redundancy set of lines is not greater than 0, subtract 1 from the number of target tie switches, reform the minimum redundancy set of lines, and return to the determining unit until an iteration stop condition is satisfied; the iteration stop condition is that the minimum redundancy of each line in the current line minimum redundancy set is more than 0, or the number of target tie switches is reduced to 0;
And the output unit is used for outputting information for prompting that the trunk line set of the target transformer substation cannot be effectively connected if the minimum redundancy quantity of each line of the current line minimum redundancy quantity set is still not more than 0 when the number of the target connection switches is reduced to 0.
In one implementation manner, the third computing unit is specifically configured to:
when the number of the trunks in the trunk line set is 1, the number of the minimum redundancy line set of the corresponding alternative point distribution scheme is 2, and the weight value of the corresponding alternative point distribution scheme is calculated according to the following formula:
Figure SMS_144
；
in the method, in the process of the invention,
Figure SMS_147
representing an alternative point placement scheme->
Figure SMS_148
Weight value of->
Figure SMS_151
For alternative point arrangement scheme->
Figure SMS_146
Corresponding line minimum redundancy set, +.>
Figure SMS_149
For alternative point arrangement scheme->
Figure SMS_152
The 1 st line minimum redundancy in the corresponding line minimum redundancy set,/->
Figure SMS_153
For alternative point arrangement scheme->
Figure SMS_145
2 nd line minimum redundancy in the corresponding line minimum redundancy set,/->
Figure SMS_150
The weight value is preset;
when the number of the trunk lines in the trunk line set is larger than 1, calculating the weight value of the corresponding alternative point distribution scheme according to the following formula:
Figure SMS_154
；
in the method, in the process of the invention,
Figure SMS_156
representing an alternative point placement scheme->
Figure SMS_160
Weight value of->
Figure SMS_162
For alternative point arrangement scheme->
Figure SMS_155
Corresponding line minimum redundancy set, +. >
Figure SMS_158
For alternative point arrangement scheme->
Figure SMS_161
The corresponding line minimum redundancy amount set +.>
Figure SMS_163
Minimum redundancy of individual lines, +.>
Figure SMS_157
For alternative point arrangement scheme->
Figure SMS_159
Variance of the corresponding line minimum redundancy set.
The invention also provides a distribution network line tie switch point selection device, which comprises:
a memory for storing instructions; the instruction is used for realizing the distribution network line interconnection switch distribution point selection method according to any one of the embodiments;
and the processor is used for executing the instructions in the memory.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the distribution network line interconnection switch point selection method according to any one of the embodiments when being executed by a processor.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working processes of the above-described apparatus, modules and units may refer to corresponding processes in the foregoing method embodiments, and specific beneficial effects of the above-described apparatus, modules and units may refer to corresponding beneficial effects in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.
The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The distribution network line interconnection switch distribution point selection method is characterized by comprising the following steps of:
determining a trunk set and the number of target tie switches of a target substation;
determining power supply schemes in different power supply directions according to the trunk line set to obtain a target power supply scheme set;
taking a tower and a cable tapping point as target endpoints, taking a line segment between two adjacent target endpoints as a corresponding target line segment, and calculating load redundancy data corresponding to different power supply schemes in the target power supply scheme set; the load redundancy data comprise load redundancy amounts of all target line segments when different target endpoints are feeder line ends;
determining a power supply range of a feeder switch serving as an upstream in a corresponding power supply scheme according to the load redundancy data;
determining a distribution point selection range of the interconnection switch on the distribution network line according to each power supply range;
performing point distribution in the determined point distribution selection range according to the number of the target tie switches to obtain alternative point distribution schemes;
calculating the minimum redundancy of the lines on different feeder switch sides under each alternative point distribution scheme to obtain a minimum redundancy set of the lines corresponding to each alternative point distribution scheme;
Calculating the weight value of the corresponding alternative point distribution scheme according to the minimum redundancy amount set of the line;
and selecting an alternative point distribution scheme with the maximum weight value from the alternative point distribution schemes as an optimal point distribution scheme of the contact switch in the target transformer substation.
2. The distribution network line tie-down point selection method according to claim 1, wherein the calculating load redundancy data corresponding to different power supply schemes in the target power supply scheme set includes:
the load redundancy of each target line segment is calculated according to the following formula:
Figure QLYQS_1
；
in the method, in the process of the invention,
Figure QLYQS_2
representing a target line segment->
Figure QLYQS_3
Load redundancy of->
Figure QLYQS_4
For the target line segment->
Figure QLYQS_5
Rated current of->
Figure QLYQS_6
For the target line segment->
Figure QLYQS_7
Is set in the above-described state.
3. The distribution network line tie-down switch distribution selection method according to claim 1, wherein determining a power-available range of a feeder switch as an upstream in a corresponding power supply scheme according to the load redundancy data comprises:
sequentially increasing the identification numbers of all target endpoints from an upstream feeder switch to a downstream feeder switch, and determining the identification number of the target endpoint meeting the load redundancy condition under the same power supply scheme as an alternative identification number according to the load redundancy data; the load redundancy condition is that the load redundancy quantity of any target line segment is smaller than a preset load redundancy quantity threshold when the corresponding target endpoint is used as the feeder end;
And selecting the largest alternative identification number from the alternative identification numbers as a target identification number, and taking a value obtained by subtracting 1 from the target identification number as an identification number capable of supplying power to a target endpoint to obtain a power-capable range serving as an upstream feeder switch in a corresponding power supply scheme.
4. A distribution network line tie-down point selection method according to claim 3, wherein the preset load redundancy amount threshold is 0.
5. The distribution network line interconnection switch distribution point selection method according to claim 1, wherein the calculating the line minimum redundancy amounts of different feeder switch sides under each alternative distribution point scheme to obtain the line minimum redundancy amount set corresponding to each alternative distribution point scheme includes:
and taking the point distribution position of the tie switch in the alternative point distribution scheme as a target point distribution position, calculating the load redundancy amount of each target line segment between the feeder switch and the target point distribution position, and taking the minimum value of the load redundancy amount as the line minimum redundancy amount at the corresponding feeder switch side in the obtained load redundancy amount calculation result.
6. The distribution network line tie switch point selection method according to claim 1, wherein the calculating the weight value of the corresponding alternative point arrangement scheme according to the line minimum redundancy amount set includes:
Judging whether the minimum redundancy of each circuit of the circuit minimum redundancy set is larger than 0;
if the minimum redundancy of each line of the line minimum redundancy set is larger than 0, selecting a corresponding preset weight value calculation formula to calculate the weight value of a corresponding alternative point distribution scheme according to the number of the main lines in the main line set;
if the minimum redundancy of each line of the minimum redundancy set of the lines is not more than 0, subtracting 1 from the number of the target tie switches, reforming the minimum redundancy set of the lines, and returning to judge whether the minimum redundancy of each line of the minimum redundancy set of the lines is more than 0 or not until the iteration stop condition is met; the iteration stop condition is that the minimum redundancy of each line in the current line minimum redundancy set is more than 0, or the number of target tie switches is reduced to 0;
if the number of the target interconnection switches is reduced to 0, the minimum redundancy of each line in the current line minimum redundancy set cannot be met, and information for prompting that the trunk set of the target substation cannot be effectively connected is output.
7. The distribution network line tie-down point selection method according to claim 6, wherein selecting a corresponding preset weight value calculation formula according to the number of trunks in the trunk set to calculate a weight value of a corresponding alternative point placement scheme includes:
When the number of the trunks in the trunk line set is 1, the number of the minimum redundancy line set of the corresponding alternative point distribution scheme is 2, and the weight value of the corresponding alternative point distribution scheme is calculated according to the following formula:
Figure QLYQS_8
；
in the method, in the process of the invention,
Figure QLYQS_11
representing an alternative point placement scheme->
Figure QLYQS_13
Weight value of->
Figure QLYQS_15
For alternative point arrangement scheme->
Figure QLYQS_9
Corresponding line minimum redundancy set, +.>
Figure QLYQS_12
For alternative point arrangement scheme->
Figure QLYQS_16
The 1 st line minimum redundancy in the corresponding line minimum redundancy set,/->
Figure QLYQS_17
For alternative point arrangement scheme->
Figure QLYQS_10
The 2 nd line minimum redundancy in the corresponding line minimum redundancy set,
Figure QLYQS_14
the weight value is preset;
when the number of the trunk lines in the trunk line set is larger than 1, calculating the weight value of the corresponding alternative point distribution scheme according to the following formula:
Figure QLYQS_18
；
in the method, in the process of the invention,
Figure QLYQS_21
representing an alternative point placement scheme->
Figure QLYQS_23
Weight value of->
Figure QLYQS_25
For alternative point arrangement scheme->
Figure QLYQS_19
Corresponding line minimum redundancy set, +.>
Figure QLYQS_22
For alternative point arrangement scheme->
Figure QLYQS_26
The corresponding line minimum redundancy amount set +.>
Figure QLYQS_27
Minimum redundancy of individual lines, +.>
Figure QLYQS_20
For alternative point arrangement scheme->
Figure QLYQS_24
Variance of the corresponding line minimum redundancy set.
8. Distribution network line tie switch distribution selecting device, characterized by comprising:
the first determining module is used for determining the trunk set of the target substation and the number of the target tie switches;
The second determining module is used for determining power supply schemes in different power supply directions according to the trunk line set to obtain a target power supply scheme set;
the first calculation module is used for taking a pole tower and a cable tapping point as target endpoints, taking a line segment between two adjacent target endpoints as a corresponding target line segment, and calculating load redundancy data corresponding to different power supply schemes in the target power supply scheme set; the load redundancy data comprise load redundancy amounts of all target line segments when different target endpoints are feeder line ends;
a third determining module, configured to determine a power-available range of the feeder switch serving as an upstream in the corresponding power supply scheme according to the load redundancy data;
a fourth determining module, configured to determine a distribution selection range of the tie switch on the distribution network line according to each of the power-available ranges;
the point setting module is used for setting points in the determined point setting selection range according to the number of the target tie switches to obtain each alternative point setting scheme;
the second calculation module is used for calculating the minimum redundancy of the lines on the different feeder switch sides under each alternative point distribution scheme to obtain a minimum redundancy set of the lines corresponding to each alternative point distribution scheme;
The third calculation module is used for calculating the weight value of the corresponding alternative point distribution scheme according to the line minimum redundancy amount set;
and the selecting module is used for selecting the alternative point distribution scheme with the maximum weight value from the alternative point distribution schemes as the optimal point distribution scheme of the contact switch in the target transformer substation.
9. Distribution network line tie switch distribution selecting device, characterized by comprising:
a memory for storing instructions; wherein the instruction is used for implementing the distribution network line interconnection switch distribution point selection method according to any one of claims 1-7;
and the processor is used for executing the instructions in the memory.
10. A computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when executed by a processor, the computer program implements the distribution network line contact switch point selection method according to any one of claims 1-7.
CN202310373982.8A 2023-04-10 2023-04-10 Distribution network line interconnection switch distribution point selection method, distribution network line interconnection switch distribution point selection device and storage medium Active CN116093940B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310373982.8A CN116093940B (en) 2023-04-10 2023-04-10 Distribution network line interconnection switch distribution point selection method, distribution network line interconnection switch distribution point selection device and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310373982.8A CN116093940B (en) 2023-04-10 2023-04-10 Distribution network line interconnection switch distribution point selection method, distribution network line interconnection switch distribution point selection device and storage medium

Publications (2)

Publication Number Publication Date
CN116093940A CN116093940A (en) 2023-05-09
CN116093940B true CN116093940B (en) 2023-06-02

Family

ID=86199521

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310373982.8A Active CN116093940B (en) 2023-04-10 2023-04-10 Distribution network line interconnection switch distribution point selection method, distribution network line interconnection switch distribution point selection device and storage medium

Country Status (1)

Country Link
CN (1) CN116093940B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102136721A (en) * 2011-03-08 2011-07-27 中国电力科学研究院 Multi-object optimized power supply recovery reasoning and searching method
CN106300339A (en) * 2016-08-29 2017-01-04 国电南瑞科技股份有限公司 A kind of Fault Isolation based on unit style power distribution network and service restoration method
CN106779277A (en) * 2016-11-07 2017-05-31 国网甘肃省电力公司电力科学研究院 The classification appraisal procedure and device of a kind of distribution network loss
CN110866735A (en) * 2019-11-13 2020-03-06 广东电网有限责任公司 Method and system for positioning switch of distribution network line contact point by using GIS model and readable storage medium
CN114530846A (en) * 2022-02-11 2022-05-24 国网山东省电力公司济南供电公司 Power distribution network transfer network reconstruction method, device and storage medium

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8294297B2 (en) * 2007-08-03 2012-10-23 Ragingwire Enterprise Solutions, Inc. Scalable distributed redundancy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102136721A (en) * 2011-03-08 2011-07-27 中国电力科学研究院 Multi-object optimized power supply recovery reasoning and searching method
CN106300339A (en) * 2016-08-29 2017-01-04 国电南瑞科技股份有限公司 A kind of Fault Isolation based on unit style power distribution network and service restoration method
CN106779277A (en) * 2016-11-07 2017-05-31 国网甘肃省电力公司电力科学研究院 The classification appraisal procedure and device of a kind of distribution network loss
CN110866735A (en) * 2019-11-13 2020-03-06 广东电网有限责任公司 Method and system for positioning switch of distribution network line contact point by using GIS model and readable storage medium
CN114530846A (en) * 2022-02-11 2022-05-24 国网山东省电力公司济南供电公司 Power distribution network transfer network reconstruction method, device and storage medium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
10kV配电网分支线保护配置方案;孔令令等;《供用电》;第21-23页 *

Also Published As

Publication number Publication date
CN116093940A (en) 2023-05-09

Similar Documents

Publication Publication Date Title
Sun et al. Optimal scheduling for electric vehicle charging with discrete charging levels in distribution grid
Mishra et al. A comprehensive review on power distribution network reconfiguration
Biswas et al. Optimum distributed generation placement with voltage sag effect minimization
da Silva et al. A heuristic constructive algorithm for capacitor placement on distribution systems
Park et al. Optimal capacitor allocation in a distribution system considering operation costs
WO2015184188A1 (en) Systems and methods for convex relaxations and linear approximations for optimal power flow in multiphase radial networks
Khan et al. A novel transmission loss allocation method based on transmission usage
CN110690718B (en) Three-phase load unbalance treatment control method
Yosef et al. Allocation and sizing of distribution transformers and feeders for optimal planning of MV/LV distribution networks using optimal integrated biogeography based optimization method
Khare et al. A Shapley value approach for transmission usage cost allocation under contingent restructured market
Simão et al. A robust solution to the load curtailment problem
CN116093940B (en) Distribution network line interconnection switch distribution point selection method, distribution network line interconnection switch distribution point selection device and storage medium
Kong et al. Probabilistic impact assessment of phase power imbalance in the LV networks with increasing penetrations of low carbon technologies
Shayeghi et al. DCGA based-transmission network expansion planning considering network adequacy
Yan et al. Reliability and power supply capability evaluation of active distribution networks with four‐terminal soft open points
CN113013855B (en) Power distribution network fault recovery method and device and terminal equipment
CN107230001A (en) Distribution network planning method based on different investment subjects under increment distribution business is decontroled
El-Araby et al. A hybrid PSO technique for procuring VAR ancillary service in the deregulated electricity markets
CN103324795A (en) Direct current system reliability evaluation method taking station service power influence into account
López-Lezama et al. A contingency-based security-constrained optimal power flow model for revealing the marginal cost of a blackout risk-equalizing policy in the colombian electricity market
CN115411735A (en) Method, system and equipment for calculating expected non-supplied electric quantity of power distribution network
CN113792977A (en) Energy storage planning method, device, equipment and medium for bottom-guaranteed power grid
Teng et al. Value-based distribution feeder automation planning
Nour et al. Control of electric vehicles charging without communication infrastructure
CN113991728A (en) Capacity configuration method, system and medium for power distribution network flexible interconnection device

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
GR01 Patent grant
GR01 Patent grant