CN110739681A - method and device for identifying topology of power supply network of low-voltage transformer area - Google Patents
method and device for identifying topology of power supply network of low-voltage transformer area Download PDFInfo
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- CN110739681A CN110739681A CN201910961911.3A CN201910961911A CN110739681A CN 110739681 A CN110739681 A CN 110739681A CN 201910961911 A CN201910961911 A CN 201910961911A CN 110739681 A CN110739681 A CN 110739681A
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- 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
Abstract
The embodiment of the invention relates to low-voltage power supply network topology identification methods and devices.
Description
Technical Field
The embodiment of the invention relates to the technical field of electric power, in particular to a method and a device for identifying topology of low-voltage transformer area power supply networks.
Background
The low-voltage distribution network is the tail end of a power grid, and due to the reasons that the related area is large, the structure is complex, the number of devices is large, the automation level is low and the like, the management blind area of the low-voltage distribution network is more, particularly, a power supply device between low-voltage users is directly in the blind area of device monitoring.
In the related technology, the method for identifying the topology of the low-voltage distribution network is to inject pulse current into the power supply network, the pulse current is equal to the current in loops everywhere, and the pulse current generated by the pulse current transmitting circuit cannot be coupled to other loops.
Disclosure of Invention
In view of this, to solve the problems in the prior art, embodiments of the present invention provide methods and apparatuses for identifying topology of a low-voltage power distribution grid.
, an embodiment of the invention provides a method for identifying topology of a low-voltage power supply network, the method includes:
determining a low-voltage distribution area to be identified;
performing clock synchronization of the low-voltage distribution area in the low-voltage distribution area to be identified;
after the clock synchronization of the low-voltage transformer area is carried out, identifying a branch power supply network topology and a meter power supply network topology;
and the branch power supply network topology and the meter power supply network topology form a low-voltage distribution room power supply network topology.
In possible embodiments, the determining the low-pressure station area to be identified includes:
receiving a low-voltage transformer identification input by a user;
and determining the low-voltage transformer area to be identified according to the low-voltage transformer area identifier.
In possible embodiments, the identifying the branch supply network topology and the meter supply network topology after the low-voltage block clock synchronization includes:
after the clock synchronization of the low-voltage transformer area is carried out, the clock synchronization is adopted for the monitoring of the branch power supply network;
a branch supply network topology and a meter supply network topology are identified.
In possible embodiments, the identifying a branch supply network topology includes:
acquiring voltage and current transient quantities of a branch power supply network;
analyzing the transient voltage and current quantities;
determining voltage, current and impedance mutation according to the analysis result;
searching and confirming time similarity according to the voltage, the current and the impedance mutation;
and identifying the topology of the branch power supply network according to the time similarity.
In possible embodiments, the identifying meter supplies a network topology comprising:
acquiring meter communication topology;
determining meter communication topology as meter basic power supply network topology;
acquiring voltage, current and impedance mutation according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage, current and impedance sudden change.
In a second aspect, an embodiment of the present invention provides types of low-voltage power supply network topology identification devices, where the devices include:
the station area determining module is used for determining a low-voltage station area to be identified;
the clock synchronization module is used for performing clock synchronization of the low-voltage transformer area in the low-voltage transformer area to be identified;
topology identification module, used to identify the branch power supply network topology after the low voltage region clock synchronization;
the second topology identification module is used for identifying the topology of the meter-measuring power supply network after the clock synchronization of the low-voltage transformer area is carried out;
and the topology composition module is used for composing a low-voltage distribution area power supply network topology by the branch power supply network topology and the meter power supply network topology.
In possible embodiments, the station area determination module is specifically configured to:
receiving a low-voltage transformer identification input by a user;
and determining the low-voltage transformer area to be identified according to the low-voltage transformer area identifier.
In possible embodiments, the topology identification module is specifically configured to:
after the clock synchronization of the low-voltage transformer area is carried out, the clock synchronization is adopted for the monitoring of the branch power supply network;
identifying a branch power supply network topology;
the second topology identification module is specifically configured to:
after the low-voltage transformer area clock synchronization is carried out, the branch power supply network monitoring adopts clock synchronization:
and identifying the topology of the meter power supply network.
In possible embodiments, the topology identification module is specifically configured to:
acquiring voltage and current transient quantities of a branch power supply network;
analyzing the transient voltage and current quantities;
determining voltage, current and impedance mutation according to the analysis result;
searching and confirming time similarity according to the voltage, the current and the impedance mutation;
and identifying the topology of the branch power supply network according to the time similarity.
In possible embodiments, the second topology identification module is specifically configured to:
acquiring meter communication topology;
determining meter communication topology as meter basic power supply network topology;
acquiring voltage, current and impedance mutation according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage, current and impedance sudden change.
According to the technical scheme provided by the embodiment of the invention, the low-voltage distribution area to be identified is determined; performing clock synchronization of the low-voltage distribution area in the low-voltage distribution area to be identified; after the clock synchronization of the low-voltage transformer area is carried out, identifying a branch power supply network topology and a meter power supply network topology; and the branch power supply network topology and the meter power supply network topology form a low-voltage distribution room power supply network topology. And no external equipment is needed, so that the cost is saved, and the installation problem is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments described in the embodiments of the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic flow chart of an implementation of a topology identification method for low-voltage power distribution network in an embodiment of the invention;
fig. 2 is a schematic diagram of the topology of low-voltage power supply grids in the embodiment of the invention;
fig. 3 is a schematic structural diagram of kinds of low-voltage power supply network topology identification devices according to an embodiment of the invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are partial embodiments of of the present invention, rather than all embodiments.
For the purpose of facilitating an understanding of the embodiments of the present invention, reference will now be made to the following description of specific embodiments , which are not intended to limit the scope of the embodiments of the present invention.
As shown in fig. 1, an implementation flow diagram of a topology identification method for low-voltage power distribution grid networks provided by an embodiment of the present invention specifically includes the following steps:
110, determining a low-voltage distribution area to be identified;
in the embodiment of the invention, the low-voltage transformer area identification input by a user can be received, and the low-voltage transformer area to be identified is determined according to the low-voltage transformer area identification.
120, performing clock synchronization of the low-voltage transformer area in the low-voltage transformer area to be identified;
in an embodiment of the invention, low-voltage block clock synchronization is performed in a low-voltage branch power supply network.
130, identifying a branch power supply network topology and a meter power supply network topology after the low-voltage distribution area clock synchronization is carried out;
after the low-voltage block clock synchronization, the branch supply network monitoring adopts clock synchronization, and then the branch supply network topology and the meter supply network topology can be identified.
For identifying the topology of the branch power supply network, the following method can be adopted:
acquiring voltage and current transient quantities of a branch power supply network; analyzing the transient voltage and current quantities; determining voltage, current and impedance mutation according to the analysis result; searching and confirming time similarity according to the voltage, the current and the impedance mutation; and identifying the topology of the branch power supply network according to the time similarity.
In addition, for identifying the meter supply network topology, the following can be used:
acquiring meter communication topology; determining meter communication topology as meter basic power supply network topology; acquiring voltage, current and impedance mutation according to the topology of a meter-based power supply network; and identifying the meter power supply network topology according to the voltage, current and impedance sudden change.
For example, as shown in fig. 2, a schematic diagram of a power supply network structure of low-voltage transformer areas provided by an embodiment of the present invention includes a transformer of a distribution room, a low-voltage chamber in-out switch cabinet of the distribution room, a low-voltage cable branch box, and a centralized meter box, wherein 4 transformers (800KVA, 630KVA) and 4 low-voltage buses are conventionally configured in the distribution room, each two sections of buses are connected by a bus tie switch, a frame-type circuit breaker (2500A, 2000A) is adopted for a low-voltage incoming cabinet, a drawer-type circuit breaker (630A, 400A, 250A, 160A) is adopted for an outgoing cabinet, a molded case circuit breaker is adopted for a low-voltage cable branch box , a three-phase molded case circuit breaker (400A, 250A) is adopted for a.
According to the equipment characteristics of the low-voltage transformer area, the power supply network of the transformer area is divided into three stages, the th stage is a main node of the transformer area, the attribute of the adopted equipment is not required to be identified, the second stage is a branch switch of the low-voltage transformer area, the branch switch is intermediate equipment, the equipment has high-speed synchronous electric application and electric transient harmonic analysis capability and is a main part of main power supply topology identification, the third stage is a user electric meter, the equipment can only provide HPLC carrier synchronous scalar application, and the electric sudden change data can be analyzed and obtained by taking the line attenuation and communication topology of the HPLC network as an initial topology.
And 140, forming a low-voltage grid area power supply network topology by the branch power supply network topology and the meter power supply network topology.
After the steps, a branch power supply network topology and a meter power supply network topology can be obtained, the branch power supply network topology and the meter power supply network topology form a low-voltage distribution area power supply network topology, and identification of the low-voltage distribution area power supply network topology is completed.
Determining a low-voltage distribution area to be identified according to the description of the technical scheme provided by the embodiment of the invention; performing clock synchronization of the low-voltage distribution area in the low-voltage distribution area to be identified; after the clock synchronization of the low-voltage transformer area is carried out, identifying a branch power supply network topology and a meter power supply network topology; and the branch power supply network topology and the meter power supply network topology form a low-voltage distribution room power supply network topology. And no external equipment is needed, so that the cost is saved, and the installation problem is avoided.
As shown in fig. 3, the topology identification device for the low-voltage power supply grid provided by the embodiment of the invention may include a grid determination module 310, a clock synchronization module 320, a topology identification module 330, a second topology identification module 340, and a topology composition module 350.
The station area determining module 310 is configured to determine a low-voltage station area to be identified;
the clock synchronization module 320 is configured to perform clock synchronization of the low-voltage distribution area in the low-voltage distribution area to be identified;
, a topology identification module 330 for identifying the branch supply network topology after the low-voltage block clock synchronization;
the second topology identification module 340 is used for identifying the meter power supply network topology after the clock synchronization of the low-voltage transformer area is carried out;
and a topology composition module 350, configured to compose a low-voltage distribution grid power supply network topology from the branch power supply network topology and the meter power supply network topology.
In specific implementation manners of the embodiment of the present invention, the block determination module 310 is specifically configured to:
receiving a low-voltage transformer identification input by a user;
determining the low-voltage transformer area to be identified according to the low-voltage transformer area identifier
In specific implementation manners of the embodiment of the present invention, the topology identification module 330 is specifically configured to:
after the clock synchronization of the low-voltage transformer area is carried out, the clock synchronization is adopted for the monitoring of the branch power supply network;
identifying a branch power supply network topology;
the second topology identifying module 340 is specifically configured to:
after the low-voltage transformer area clock synchronization is carried out, the branch power supply network monitoring adopts clock synchronization:
and identifying the topology of the meter power supply network.
In specific implementation manners of the embodiment of the present invention, the topology identification module 330 is specifically configured to:
acquiring voltage and current transient quantities of a branch power supply network;
analyzing the transient voltage and current quantities;
determining voltage, current and impedance mutation according to the analysis result;
searching and confirming time similarity according to the voltage, the current and the impedance mutation;
and identifying the topology of the branch power supply network according to the time similarity.
In specific implementation manners of the embodiment of the present invention, the second topology identifying module 340 is specifically configured to:
acquiring meter communication topology;
determining meter communication topology as meter basic power supply network topology;
acquiring voltage, current and impedance mutation according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage, current and impedance sudden change.
it should also be further appreciated that the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of both, and that the exemplary components and steps have been described above generally in terms of functionality for clarity of illustrating interchangeability of hardware and software.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention have been described in , it should be understood that the above-mentioned embodiments are only illustrative and not intended to limit the scope of the present invention, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1, A method for identifying topology of low-voltage power supply network, the method includes:
determining a low-voltage distribution area to be identified;
performing clock synchronization of the low-voltage distribution area in the low-voltage distribution area to be identified;
after the clock synchronization of the low-voltage transformer area is carried out, identifying a branch power supply network topology and a meter power supply network topology;
and the branch power supply network topology and the meter power supply network topology form a low-voltage distribution room power supply network topology.
2. The method of claim 1, wherein the determining a low-voltage station area to be identified comprises:
receiving a low-voltage transformer identification input by a user;
and determining the low-voltage transformer area to be identified according to the low-voltage transformer area identifier.
3. The method of claim 1, wherein identifying a branch supply network topology and a meter supply network topology after performing low-voltage block clock synchronization comprises:
after the clock synchronization of the low-voltage transformer area is carried out, the clock synchronization is adopted for the monitoring of the branch power supply network;
a branch supply network topology and a meter supply network topology are identified.
4. The method of claim 1, wherein the identifying a branch supply network topology comprises:
acquiring voltage and current transient quantities of a branch power supply network;
analyzing the transient voltage and current quantities;
determining voltage, current and impedance mutation according to the analysis result;
searching and confirming time similarity according to the voltage, the current and the impedance mutation;
and identifying the topology of the branch power supply network according to the time similarity.
5. The method of claim 1, wherein identifying the meter supply network topology comprises:
acquiring meter communication topology;
determining meter communication topology as meter basic power supply network topology;
acquiring voltage, current and impedance mutation according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage, current and impedance sudden change.
6, A low-voltage power supply network topology identification device, characterized in that, the device includes:
the station area determining module is used for determining a low-voltage station area to be identified;
the clock synchronization module is used for performing clock synchronization of the low-voltage transformer area in the low-voltage transformer area to be identified;
topology identification module, used to identify the branch power supply network topology after the low voltage region clock synchronization;
the second topology identification module is used for identifying the topology of the meter-measuring power supply network after the clock synchronization of the low-voltage transformer area is carried out;
and the topology composition module is used for composing a low-voltage distribution area power supply network topology by the branch power supply network topology and the meter power supply network topology.
7. The apparatus of claim 6, wherein the station zone determination module is specifically configured to:
receiving a low-voltage transformer identification input by a user;
and determining the low-voltage transformer area to be identified according to the low-voltage transformer area identifier.
8. The apparatus according to claim 6, wherein the th topology identification module is specifically configured to:
after the clock synchronization of the low-voltage transformer area is carried out, the clock synchronization is adopted for the monitoring of the branch power supply network;
identifying a branch power supply network topology;
the second topology identification module is specifically configured to:
after the low-voltage transformer area clock synchronization is carried out, the branch power supply network monitoring adopts clock synchronization:
and identifying the topology of the meter power supply network.
9. The apparatus according to claim 6, wherein the th topology identification module is specifically configured to:
acquiring voltage and current transient quantities of a branch power supply network;
analyzing the transient voltage and current quantities;
determining voltage, current and impedance mutation according to the analysis result;
searching and confirming time similarity according to the voltage, the current and the impedance mutation;
and identifying the topology of the branch power supply network according to the time similarity.
10. The apparatus according to claim 6, wherein the second topology identification module is specifically configured to:
acquiring meter communication topology;
determining meter communication topology as meter basic power supply network topology;
acquiring voltage, current and impedance mutation according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage, current and impedance sudden change.
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Denomination of invention: A topology identification method and device for low-voltage substation power supply network Effective date of registration: 20220929 Granted publication date: 20210427 Pledgee: Beijing first financing Company limited by guarantee Pledgor: CHINA ELECTRIC POWER HWARAY TECHNOLOGY CO.,LTD. Registration number: Y2022980017114 |