CN117060404B - Power distribution network feeder line group-to-power supply control method and device - Google Patents
Power distribution network feeder line group-to-power supply control method and device Download PDFInfo
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- CN117060404B CN117060404B CN202311309204.9A CN202311309204A CN117060404B CN 117060404 B CN117060404 B CN 117060404B CN 202311309204 A CN202311309204 A CN 202311309204A CN 117060404 B CN117060404 B CN 117060404B
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Classifications
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- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
-
- 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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
-
- 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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
Abstract
The utility model discloses a distribution network feeder group changes power supply control method and device, relate to the distribution technology, the configuration condition of automatic switch in the distribution network feeder is firstly confirmed according to the feeder topology information of distribution network, with the feeder line segment that automatic switch divided as the unit, then combine the power supply constraint condition of the power supply of distribution network, confirm each feeder line segment and the power supply between them can supply power line, and then confirm the fault line according to the fault protection action signal, compare the fault line segment with each can supply power line, in order to confirm available power supply line, namely the target power supply line, finally, integrate the target power supply line, form the feeder group changes power supply control scheme of this distribution network, in order to combine corresponding change the rule of supplying point to break off or close corresponding sectionalizing switch, tie switch according to the feeder group changes power supply control scheme, realize more nimble feeder group changes power supply control.
Description
Technical Field
The application relates to the technical field of power distribution, in particular to a power distribution network feeder line group-to-power supply control method and device.
Background
In order to improve the power supply reliability of the medium-voltage distribution network, the medium-voltage distribution network adopts a closed-loop design and an open-loop operation mode, and the power supply of a non-fault section is recovered by adopting a non-power-failure transfer mode preferentially when a fault power failure or a planned power failure occurs, i.e. the self-healing function of a circuit is realized, for example, a certain user is powered by the power supply of an A circuit of a power supply department, and the condition of temporary power supply of a B circuit of the power supply department is arranged because the A circuit needs to be overhauled or has a fault.
However, the existing self-healing strategy generally only uses feeder line groups as units for modeling, and a power transfer scheme obtained based on the modeling can automatically cut off fault line segments and restore power supply of non-fault line segments, but the existing method controls a contact switch, so that automatic power transfer between whole contact lines can only be realized, the power transfer control flexibility is poor, and the current complex power distribution network power transfer control requirement cannot be met.
Disclosure of Invention
The application provides a power distribution network feeder line group-to-power supply control method and device, which are used for solving the technical problem that the flexibility is poor in the existing power distribution network-to-power supply control.
In order to solve the technical problems, the power distribution network feeder line group-to-power supply control method comprises the following steps:
acquiring feeder topology information of a power distribution network, and determining configuration information of an automatic switch in a feeder according to the feeder topology information, wherein the automatic switch comprises: a tie switch and a sectionalizer switch;
dividing each feeder line of the power distribution network into a plurality of feeder line segments according to the configuration information of the automatic switch, and determining a power supply line between each feeder line segment and a power supply by combining the power supply constraint condition of the power distribution network;
when a fault protection action signal is received, determining a fault line segment according to the fault protection action signal, and comparing the fault line segment with each power supply line according to the fault line segment so as to determine a target power supply line which does not contain the fault line segment;
and generating a feeder line group-to-power supply control scheme of the power distribution network according to the target power supply line, so as to control the automatic switch to perform feeder line group-to-power supply of the power distribution network according to the feeder line group-to-power supply control scheme.
Preferably, the method further comprises:
according to the feeder line group-to-power supply control scheme, calculating load data of each power supply through a preset power supply load calculation formula, and outputting the feeder line group-to-power supply control scheme if the load data does not exceed a load threshold value of a corresponding power supply.
Preferably, the power load calculation formula is specifically
；
；
；
Wherein S is i For the ith power supply in the distribution network, qi is the load data of the power supply i,for the feeder line segment incidence matrix of the distribution network, < >>For fusion matrix +.>For a feeder line segment load matrix of the distribution network,for calculating the matrix +.>For the association relation coefficient of the feeder n and the feeder i of the power distribution network, < > the power distribution network>The element values of p rows and j columns in the fusion matrix are represented by p, wherein p represents any feeder line in the power distribution network, and j represents a power supply S i An energized feed line.
Preferably, the generating a feeder line group-to-power supply control scheme of the power distribution network according to the target power supply line specifically includes:
acquiring an initial power supply set, wherein the power supply set comprises feeder line segments supplied by the power supply;
and updating the initial power supply set according to the target power supply line to generate a feeder line group-to-power supply control scheme of the power distribution network according to the updated power supply set.
Preferably, the method further comprises:
when a plurality of feeder line group-to-power supply control schemes are generated, comparing load data, the number of power supply line segments and/or the number of switching actions of each feeder line group-to-power supply control scheme respectively, so as to determine an optimal feeder line group-to-power supply control scheme according to a comparison result.
The second aspect of the present application provides a power distribution network feeder group changes power supply control device, including:
a feeder switch information obtaining unit, configured to obtain feeder topology information of a power distribution network, determine configuration information of an automation switch in a feeder according to the feeder topology information, where the automation switch includes: a tie switch and a sectionalizer switch;
the power supply information processing unit is used for dividing each feeder line of the power distribution network into a plurality of feeder line segments according to the configuration information of the automatic switch, and determining a power supply line between each feeder line segment and a power supply source by combining the power supply constraint condition of the power distribution network;
the target power supply line determining unit is used for determining a fault line segment according to the fault protection action signal when the fault protection action signal is received, and comparing the fault line segment with each power supply line according to the fault line segment so as to determine a target power supply line which does not contain the fault line segment;
and the power transfer control scheme generating unit is used for generating a feeder line group power transfer control scheme of the power distribution network according to the target power supply line so as to control the automatic switch to perform feeder line group power transfer of the power distribution network according to the feeder line group power transfer control scheme.
Preferably, the method further comprises:
and the power conversion load calculation unit is used for calculating the load data of each power supply through a preset power supply load calculation formula according to the feeder line group power conversion control scheme, and outputting the feeder line group power conversion control scheme if the load data does not exceed the load threshold value of the corresponding power supply.
Preferably, the power load calculation formula is specifically:
；
；
；
wherein S is i For the ith power supply in the distribution network, qi is the load data of the power supply i,for the feeder line segment incidence matrix of the distribution network, < >>For fusion matrix +.>For a feeder line segment load matrix of the distribution network,for calculating the matrix +.>For the association relation coefficient of the feeder n and the feeder i of the power distribution network, < > the power distribution network>The element values of p rows and j columns in the fusion matrix are represented by p, wherein p represents any feeder line in the power distribution network, and j represents a power supply S i An energized feed line.
Preferably, the power transfer control scheme generating unit is specifically configured to:
acquiring an initial power supply set, wherein the power supply set comprises feeder line segments supplied by the power supply;
and updating the initial power supply set according to the target power supply line to generate a feeder line group-to-power supply control scheme of the power distribution network according to the updated power supply set so as to control the automatic switch to perform feeder line group-to-power supply of the power distribution network according to the feeder line group-to-power supply control scheme.
Preferably, the method further comprises:
and the power transfer scheme screening unit is used for comparing the load data, the number of power supply line segments and/or the number of switching actions of each feeder line group power transfer control scheme respectively when a plurality of generated feeder line group power transfer control schemes are provided, so as to determine the optimal feeder line group power transfer control scheme according to the comparison result.
From the above technical scheme, the application has the following advantages:
according to the technical scheme, firstly, the configuration condition of an automatic switch in a feeder line of a power distribution network is determined according to the feeder line topology information of the power distribution network, feeder line segments divided by the automatic switch are taken as units, then power supply constraint conditions of the power distribution network are combined, power supply lines between each feeder line segment and a power supply source are determined, fault lines are determined according to fault protection action signals, the fault line segments are compared with each power supply line, so that available power supply lines, namely target power supply lines, are determined, finally, the target power supply lines are integrated, a feeder line group transfer power supply control scheme of the power distribution network is formed, and accordingly, corresponding sectional switches and connecting switches are opened or closed according to the feeder line group transfer power supply control scheme and corresponding transfer point rules, and more flexible feeder line group transfer power supply control is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic diagram of a feeder network structure of a medium voltage distribution network.
Fig. 2 is a schematic flow chart of an embodiment of a power distribution network feeder line group-to-power supply control method provided in the present application.
Fig. 3 is a flow chart of another embodiment of a method for controlling power distribution network feeder line group-to-power supply provided in the present application.
Fig. 4 is a schematic structural diagram of an embodiment of a feeder line-to-power supply control device for a power distribution network provided in the present application.
Detailed Description
The embodiment of the application provides a power distribution network feeder line group-to-power supply control method and device, which are used for solving the technical problem that the flexibility is poor in the existing power distribution network-to-power supply control.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the embodiments described below are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Firstly, a detailed description of an embodiment of a power distribution network feeder line group-to-power supply control method is provided, which is specifically as follows:
referring to fig. 2, the method for controlling power distribution network feeder line group-to-power supply according to the present embodiment includes:
step 101, acquiring feeder topology information of a power distribution network, and determining configuration information of an automatic switch in a feeder according to the feeder topology information.
The automated switch includes: a tie switch and a sectionalizer.
Step 102, dividing each feeder line of the power distribution network into a plurality of feeder line segments according to configuration information of an automatic switch, and determining a powerable line between each feeder line segment and a power supply by combining power supply constraint conditions of the power distribution network.
It should be noted that, according to the distribution network controlled by the transfer point, the configuration information of the automatic switch in the feeder is determined according to the feeder topology information of the distribution network, where the configuration information of the automatic switch includes, but is not limited to, the installation position of the automatic switch and the type of the automatic switch, and the types of the automatic switch related to this embodiment generally include a tie switch and a sectionalizer, as shown in fig. 1, where the tie switch is generally normally open and is used to divide different feeder groups, such as S1-A7, S1-A4, S2-A6-A5, S3-A8, and the sectionalizer is generally normally closed and is used to divide different line segments of the same feeder group, such as A1, A2, … …, A8 in fig. 1.
According to the configuration information of the automatic switch, the line segment divided by the automatic switch is taken as a line segment of a feeder unit, each feeder line of the power distribution network is divided into a plurality of feeder line segments, and then, according to the divided feeder line segments and in combination with the power supply constraint condition of the power distribution network, the powerable line between each feeder line segment and the power supply source is determined, and it should be noted that, the powerable line mentioned in this embodiment may be understood as an electric energy supply link between the feeder line segment and each power supply source without considering the switch to be opened, for example, taking the A7 segment as an example, it is assumed that the power supply ranges of three power supply sources S1 to S3 in the graph may all cover each line segment in fig. 1, and the corresponding powerable line may include: S1-A1-A7, S3-A3-A8-A7, and S2-A2-A6-A5-A4-A1-A7.
And 103, when a fault protection action signal is received, determining a fault line segment according to the fault protection action signal, and comparing the fault line segment with each power supply line according to the fault line segment so as to determine a target power supply line which does not contain the fault line segment.
Step 104, generating a feeder line group-to-power supply control scheme of the power distribution network according to the target power supply line, so as to control the automatic switch to perform feeder line group-to-power supply of the power distribution network according to the feeder line group-to-power supply control scheme.
It should be noted that, based on the information pre-constructed in step 101 and step 102, when the fault protection action signal is received, a fault line segment is determined according to the fault protection action signal, and the switches on both sides of the corresponding fault line segment may be considered to be turned off, and the fault line segment is compared with each power-available line to determine an available power-supply line that does not include the fault line segment as a target power-supply line; and integrating the target power supply lines based on the screened target power supply lines and combining with some conventional power transfer rules to form a feeder line group power transfer control scheme of the power distribution network so as to control an automatic switch to transfer the feeder line group of the power distribution network according to the feeder line group power transfer control scheme.
According to the technical scheme provided by the embodiment, firstly, the configuration condition of an automatic switch in a feeder line of a power distribution network is determined according to the feeder line topology information of the power distribution network, feeder line segments divided by the automatic switch are taken as units, then power supply lines between each feeder line segment and a power supply source are determined by combining the power supply constraint condition of the power distribution network, fault lines are determined according to fault protection action signals, the fault line segments are compared with each power supply line to determine available power supply lines which do not contain the fault line segments, namely target power supply lines, finally, the target power supply lines are integrated to form a feeder line group transfer power supply control scheme of the power distribution network, so that corresponding sectional switches and tie switches are opened or closed according to the feeder line group transfer power supply control scheme in combination with corresponding transfer point rules, and more flexible feeder line group transfer power supply control is realized, and each non-fault line segment and non-overhaul line segment can automatically restore power supply as much as possible.
The foregoing is a detailed description of a basic embodiment of a power distribution network feeder line group-to-power supply control method provided by the present application, and the following is a detailed description of a further embodiment of a power distribution network feeder line group-to-power supply control method provided by the present application based on the foregoing basic embodiment, specifically as follows:
referring to fig. 3, more specifically, in step 104, a feeder group-to-power control scheme of the power distribution network is generated according to the target power supply line, where the steps specifically may include:
step 1041, obtaining an initial power supply set, wherein the power supply set comprises feeder line segments supplied by a power supply;
step 1042, updating the initial power supply set according to the target power supply line, so as to generate a feeder line group-to-power supply control scheme of the power distribution network according to the updated power supply set.
It should be noted that, defining a power supply set S i As shown in formula (1):
（1）
in the current operation mode, the elements a, b, d and the like in the set are all line segment sequence number sets powered by the power supply i, for example, taking the initial topology shown in fig. 1 as an example, the initial power supply set corresponds to:，，/>。
in the process of generating the feeder line group-to-power supply control scheme, according to the target power supply line determined in step 103, determining the power supply source corresponding to each feeder line segment, and updating the power supply set, for example, when the line segment A1 in fig. 1 is a fault segment, at this time, the power is originally supplied by S1 and the power supply line needs to pass through A4 and A7 of the line segment A1, and at this time, only the power supply lines available for the line segment A4 remain: S2-A2-A6-A5-A4, and similarly, the power supply line available for line segment A7 only remains: S3-A8-A7, the remaining unaffected feeders are negligible, so the initial power supply set is updated according to these target power supply lines, and the updated power supply set can be expressed as:，/>，/>and finally, generating a corresponding feeder line group-to-power supply control scheme based on the updated power supply set.
In some embodiments, step 104 may further include:
and 105, calculating the load data of each power supply according to a feeder line group-to-power supply control scheme through a preset power supply load calculation formula, and outputting the feeder line group-to-power supply control scheme if the load data does not exceed the load threshold value of the corresponding power supply.
In some embodiments, the power load calculation formula is specifically:
；
；
；
wherein S is i For the ith power supply in the distribution network, qi is the load data of the power supply i,for the feeder line segment incidence matrix of the distribution network, +.>For fusion matrix +.>Load matrix of feeder line segments of power distribution network, +.>For calculating the matrix +.>For the association relation coefficient of the feeder n and the feeder i of the power distribution network, < > the power distribution network>The element values of p rows and j columns in the fusion matrix are represented by p, wherein p represents any feeder line in the power distribution network, and j represents a power supply S i An energized feed line.
Wherein, first, an n×n order correlation matrix G is defined with respect to the present embodiment n×n As shown in formula (2). Wherein the method comprises the steps of，g ij Representing the association relationship between the ith line segment and the jth line segment, when g ij =1 indicates that the line segment i is directly connected to the line segment j by a switch. g ij =0 indicates that the line segment i and the line segment j are directly connected without a switch or the switch is in an off state
（2）
Definition of an n×n order load matrix F n×n As shown in formula (3). Wherein f kk Representing the maximum load of the kth line segment,the maximum value of the difference between the switching current values before and after the line segment is added with the average value of the net surfing current value of the new energy source in the transferring period, wherein i kp Indicating the instantaneous value, i, of the current value on the small-number side of the kth line segment kq Indicating the instantaneous value, i of the current value at the same time on the large-size side of the kth line segment t And the instantaneous value of the online current value of the new energy source of the kth line segment in the transfer period is represented.
（3）
F n×n It can also be expressed as:
；
definition of an n×n order computation matrix J n×n As shown in formula (4).
（4）
The value of the calculated matrix parameter provided in this embodiment is derived from the correlation matrix G only n×n The values of the diagonal parameter values are the same row of the incidence matrix G n×n 1/2 of the reciprocal of the sum of the parameters. The function is that when the matrix calculation is performed, the original values of the current values of all the line segments can be added, and all the line segments can not be caused by the rule of the matrix calculationThe current values are superimposed too many times.
Based on the three-term matrix, performing matrix calculation according to a matrix fusion calculation formula to obtain a fusion matrixThe matrix fusion calculation formula can be referred to as the following formula (5):
（5）
in some embodiments, the method provided in this embodiment may further include:
and 106, when a plurality of generated feeder line group-to-power supply control schemes exist, comparing the load data, the number of power supply line segments and/or the number of switching actions of each feeder line group-to-power supply control scheme respectively, so as to determine the optimal feeder line group-to-power supply control scheme according to the comparison result.
It should be noted that, when some feeder lines are selected as non-unique lines of the target power supply line, a plurality of parallel feeder line group transfer power supply control schemes may be generated at this time, when there are a plurality of generated feeder line group transfer power supply control schemes, load data, the number of power supply line segments and/or the number of switching actions of each feeder line group transfer power supply control scheme are compared, and finally, according to the comparison result, an optimal feeder line group transfer power supply control scheme is determined as a final scheme.
The optimal scheme mentioned in this embodiment may be a scheme with the most balanced power loads, a scheme with the lowest total load, or a scheme with the largest number of available power line segments, i.e. the largest coverage area, or a scheme with the smallest switching action times, or a scheme with the lowest comprehensive optimal. The method for calculating the comprehensive optimization can adopt a weighting method, a multi-target learning optimization algorithm and other existing multi-index comprehensive calculation methods, and will not be described herein.
The detailed description of the specific embodiment of the power distribution network feeder line group-to-power supply control method provided by the application is provided above, and the detailed description of the embodiment of the power distribution network feeder line group-to-power supply control device provided by the application is provided below.
Referring to fig. 4, this embodiment provides a power distribution network feeder line group-to-power supply control device, including:
a feeder switch information obtaining unit 201, configured to obtain feeder topology information of a power distribution network, determine configuration information of an automation switch in a feeder according to the feeder topology information, where the automation switch includes: a tie switch and a sectionalizer switch;
the power supply information processing unit 202 is configured to divide each feeder line of the power distribution network into a plurality of feeder line segments according to configuration information of the automatic switch, and determine a power supply line between each feeder line segment and a power supply source in combination with a power supply constraint condition of the power distribution network;
a target power supply line determining unit 203, configured to determine a fault line segment according to the fault protection action signal when the fault protection action signal is received, and compare the fault line segment with each power supply line according to the fault line segment, so as to determine a target power supply line that does not include the fault line segment;
and the power transfer control scheme generating unit 204 is configured to generate a feeder line group power transfer control scheme of the power distribution network according to the target power supply line, so as to control the automatic switch to perform feeder line group power transfer of the power distribution network according to the feeder line group power transfer control scheme.
Further, the method further comprises the following steps:
the power conversion load calculation unit 205 is configured to calculate load data of each power supply according to a feeder line group power conversion control scheme through a preset power supply load calculation formula, and if the load data does not exceed a load threshold value of a corresponding power supply, output the feeder line group power conversion control scheme.
Further, the power load calculation formula is specifically
；
；
；
Wherein S is i For the ith power supply in the distribution network, qi is the load data of the power supply i,for the feeder line segment incidence matrix of the distribution network, +.>For fusion matrix +.>Load matrix of feeder line segments of power distribution network, +.>For calculating the matrix +.>For the association relation coefficient of the feeder n and the feeder i of the power distribution network, < > the power distribution network>The element values of p rows and j columns in the fusion matrix are represented by p, wherein p represents any feeder line in the power distribution network, and j represents a power supply S i An energized feed line.
Further, the power conversion control scheme generating unit 204 is specifically configured to:
acquiring an initial power supply set, wherein the power supply set comprises feeder line segments supplied by a power supply;
updating the initial power supply set according to the target power supply line to generate a feeder line group-to-power supply control scheme of the power distribution network according to the updated power supply set, so as to control the automatic switch to perform feeder line group-to-power supply of the power distribution network according to the feeder line group-to-power supply control scheme.
Further, the method further comprises the following steps:
and the power conversion scheme screening unit 206 is configured to compare the load data, the number of power-available segments and/or the number of switching actions of each feeder line group power conversion control scheme when there are multiple generated feeder line group power conversion control schemes, so as to determine an optimal feeder line group power conversion control scheme according to the comparison result.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the apparatus and units described above may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
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, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, 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 units, which may be in electrical, mechanical or other form.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented, for example, in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in this application, "at least one" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, 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 merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should 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 corresponding technical solutions.
Claims (4)
1. The power distribution network feeder line group-to-power supply control method is characterized by comprising the following steps of:
acquiring feeder topology information of a power distribution network, and determining configuration information of an automatic switch in a feeder according to the feeder topology information, wherein the automatic switch comprises: a tie switch and a sectionalizer switch;
dividing each feeder line of the power distribution network into a plurality of feeder line segments according to the configuration information of the automatic switch, and determining a power supply line between each feeder line segment and a power supply by combining the power supply constraint condition of the power distribution network;
when a fault protection action signal is received, determining a fault line segment according to the fault protection action signal, and comparing the fault line segment with each power supply line according to the fault line segment so as to determine a target power supply line which does not contain the fault line segment;
acquiring an initial power supply set, wherein the power supply set comprises feeder line segments supplied by the power supply;
updating the initial power supply set according to the target power supply line to generate a feeder line group-to-power supply control scheme of the power distribution network according to the updated power supply set so as to control the automatic switch to perform feeder line group-to-power supply of the power distribution network according to the feeder line group-to-power supply control scheme;
calculating load data of each power supply through a preset power supply load calculation formula according to the feeder line group-to-power supply control scheme, and outputting the feeder line group-to-power supply control scheme if the load data does not exceed a load threshold value of a corresponding power supply;
the power load calculation formula specifically comprises:
；
；
；
wherein S is i For the ith power supply in the distribution network, qi is the load data of the power supply i,for the feeder line segment incidence matrix of the distribution network, < >>For fusion matrix +.>For the feeder line segment load matrix of the distribution network, < >>For calculating the matrix +.>For the association relation coefficient of the feeder n and the feeder i of the power distribution network, < > the power distribution network>For the element values of p rows and j columns in the fusion matrix, where p representsIs any feeder line in the distribution network, j represents a power supply S i An energized feed line.
2. The power distribution network feeder line group-to-power supply control method according to claim 1, further comprising:
when a plurality of feeder line group-to-power supply control schemes are generated, comparing load data, the number of power supply line segments and/or the number of switching actions of each feeder line group-to-power supply control scheme respectively, so as to determine an optimal feeder line group-to-power supply control scheme according to a comparison result.
3. The utility model provides a distribution network feeder group changes power supply control device which characterized in that includes:
a feeder switch information obtaining unit, configured to obtain feeder topology information of a power distribution network, determine configuration information of an automation switch in a feeder according to the feeder topology information, where the automation switch includes: a tie switch and a sectionalizer switch;
the power supply information processing unit is used for dividing each feeder line of the power distribution network into a plurality of feeder line segments according to the configuration information of the automatic switch, and determining a power supply line between each feeder line segment and a power supply source by combining the power supply constraint condition of the power distribution network;
the target power supply line determining unit is used for determining a fault line segment according to the fault protection action signal when the fault protection action signal is received, and comparing the fault line segment with each power supply line according to the fault line segment so as to determine a target power supply line which does not contain the fault line segment;
a power transfer control scheme generating unit, configured to obtain an initial power supply set, where the power supply set includes feeder line segments powered by the power supply, update the initial power supply set according to the target power supply line, and generate a feeder line group power transfer control scheme of the power distribution network according to the updated power supply set, so as to control the automatic switch to perform feeder line group transfer of the power distribution network according to the feeder line group power transfer control scheme;
the power conversion load calculation unit is used for calculating the load data of each power supply through a preset power supply load calculation formula according to the feeder line group power conversion control scheme, and outputting the feeder line group power conversion control scheme if the load data does not exceed the load threshold value of the corresponding power supply;
the power load calculation formula specifically comprises:
；
；
；
wherein S is i For the ith power supply in the distribution network, qi is the load data of the power supply i,for the feeder line segment incidence matrix of the distribution network, < >>For fusion matrix +.>For the feeder line segment load matrix of the distribution network, < >>For calculating the matrix +.>For the association relation coefficient of the feeder n and the feeder i of the power distribution network, < > the power distribution network>The element values of p rows and j columns in the fusion matrix are represented by p, wherein p represents any feeder line in the power distribution network, and j represents a power supply S i An energized feed line.
4. A distribution grid feeder line transfer power supply control apparatus as claimed in claim 3, further comprising:
and the power transfer scheme screening unit is used for comparing the load data, the number of power supply line segments and/or the number of switching actions of each feeder line group power transfer control scheme respectively when a plurality of generated feeder line group power transfer control schemes are provided, so as to determine the optimal feeder line group power transfer control scheme according to the comparison result.
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