CN110739681B - Low-voltage transformer area power supply network topology identification method and device - Google Patents
Low-voltage transformer area power supply network topology identification method and device Download PDFInfo
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Abstract
The embodiment of the invention relates to a method and a device for identifying topology of a power supply network of a low-voltage transformer area, wherein the method comprises the following steps: 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.
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 a power supply network of a low-voltage transformer area.
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 devices are numerous, the automation level is low and the like, the management blind areas of the low-voltage distribution network are more, and especially power supply devices between low-voltage users are always in the blind areas of device monitoring. Therefore, operation and distribution information penetration work is vigorously carried out by a power grid company, and topology identification of the power supply network in the low-voltage transformer area is important for improving the power supply reliability management level and the power supply service capacity of the power grid company. The topology identification of the power supply network of the low-voltage distribution area is carried out, the connection relation between each electrical device and a power supply source of the electrical device such as a park, a residential district, a building and the like is obtained reliably, and the connection relations are stored in a certain mode.
In the related art, the method for identifying the topology of the low-voltage distribution room power supply network is to inject pulse current into the power supply network, the current in the same loop is equal everywhere, and the pulse current generated by the pulse current transmitting circuit is not coupled to other loops. The mode of injecting the pulse current needs to be added with plug-in equipment, and because the equipment needs to identify pulse current signals and needs a high-grade CPU to perform harmonic analysis, the equipment cost is too high and the installation problem needs to be solved.
Disclosure of Invention
In view of this, to solve the problems in the prior art, embodiments of the present invention provide a method and an apparatus for identifying topology of a low-voltage power supply network.
In a first aspect, an embodiment of the present invention provides a method for identifying topology of a low-voltage power supply network, where 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 one possible embodiment, the determining the low-voltage 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 one possible embodiment, 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 one possible embodiment, 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 a voltage parameter, a current parameter and an impedance mutation according to the analysis result;
searching and confirming time similarity according to the voltage parameter, the current parameter and the impedance mutation;
and identifying the topology of the branch power supply network according to the time similarity.
In one possible embodiment, the identification meter power supply network topology comprises:
acquiring meter communication topology;
determining meter communication topology as meter basic power supply network topology;
acquiring voltage parameters, current parameters and impedance sudden changes according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage parameter, the current parameter and the impedance sudden change.
In a second aspect, an embodiment of the present invention provides a low-voltage power supply grid topology identification apparatus, where the apparatus 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;
the first topology identification module is used for identifying the topology of the branch power supply network after the clock synchronization of the low-voltage transformer area is carried out;
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 a possible implementation manner, the station area determining 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 a possible implementation manner, the first 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 a possible implementation manner, the first 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 a voltage parameter, a current parameter and an impedance mutation according to the analysis result;
searching and confirming time similarity according to the voltage parameter, the current parameter and the impedance mutation;
and identifying the topology of the branch power supply network according to the time similarity.
In a possible implementation manner, 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 parameters, current parameters and impedance sudden changes according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage parameter, the current parameter and the 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 some embodiments described in the embodiments of the present invention, and it is also possible for a person skilled in the art to obtain other drawings based on the drawings.
Fig. 1 is a schematic flow chart of an implementation of a method for identifying topology of a low-voltage power supply network in a power distribution grid area according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a topology of a low-voltage power supply network in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a low-voltage distribution grid topology identification device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the convenience of understanding of the embodiments of the present invention, the following description will be further explained with reference to specific embodiments, which are not to be construed as limiting the embodiments of the present invention.
As shown in fig. 1, an implementation flow diagram of a method for identifying a topology of a low-voltage power supply grid 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 a voltage parameter, a current parameter and an impedance mutation according to the analysis result; searching and confirming time similarity according to the voltage parameter, the current parameter 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 parameters, current parameters and impedance sudden changes according to the topology of a meter-based power supply network; and identifying the meter power supply network topology according to the voltage parameter, the current parameter and the impedance sudden change.
For example, as shown in fig. 2, a schematic diagram of a power supply network structure of a low-voltage distribution area is provided for an embodiment of the present invention, where the distribution room transformer, the distribution room low-voltage chamber incoming and outgoing line switch cabinet, the low-voltage cable branch box, and the centralized meter box are provided. 4 transformers (800KVA, 630KVA) are conventionally configured in the power distribution room, 4 sections of low-voltage buses are connected through a bus coupler switch. The low-voltage incoming cabinet adopts frame type circuit breakers (2500A, 2000A), the outgoing cabinet adopts drawer type circuit breakers (630A, 400A, 250A, 160A), the low-voltage cable branch box generally adopts molded case circuit breakers, the switches in front of the centralized meter box are three-phase molded case circuit breakers (400A, 250A), and the miniature circuit breaker (63A) is arranged behind the meter.
According to the equipment characteristics of the low-voltage distribution area, the distribution area power supply network is divided into three stages, the first stage is that a distribution area transformer is a main node of the power supply network, and the adopted equipment attributes do not need to be identified. The second stage is a low-voltage transformer area shunt branch switch which is intermediate equipment, and the equipment has high-speed synchronous electrical adoption and electrical transient harmonic analysis capability and is a main part of main power supply topology identification; and the third level is a user ammeter, equipment can only provide an HPLC carrier synchronization scalar for use, and the analysis and the acquisition of the electrical mutation data are realized by taking the line attenuation and the communication topology of an 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 apparatus for a low-voltage power supply grid provided by an embodiment of the present invention may include: the station area determining module 310, the clock synchronizing module 320, the first topology identifying module 330, the second topology identifying module 340, and the topology composing 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;
the first topology identification module 330 is configured to identify a branch power supply network topology after performing clock synchronization of the low-voltage distribution room;
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 a specific implementation manner of the embodiment of the present invention, the platform area determining 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 a specific implementation manner of the embodiment of the present invention, the first topology identifying 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 a specific implementation manner of the embodiment of the present invention, the first topology identifying 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 a voltage parameter, a current parameter and an impedance mutation according to the analysis result;
searching and confirming time similarity according to the voltage parameter, the current parameter and the impedance mutation;
and identifying the topology of the branch power supply network according to the time similarity.
In a specific implementation manner 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 parameters, current parameters and impedance sudden changes according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage parameter, the current parameter and the impedance sudden change.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
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 are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A low-voltage power supply network topology identification method is characterized by comprising the following steps:
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;
identifying a branch supply network topology and a meter supply network topology after low-voltage block clock synchronization, comprising: acquiring voltage and current transient quantities of a branch power supply network; analyzing the transient voltage and current quantities; determining a voltage parameter, a current parameter and an impedance mutation according to the analysis result; searching and confirming time similarity according to the voltage parameter, the current parameter and the impedance mutation; identifying a branch power supply network topology according to the time similarity;
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 identifying the meter supply network topology comprises:
acquiring meter communication topology;
determining meter communication topology as meter basic power supply network topology;
acquiring voltage parameters, current parameters and impedance sudden changes according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage parameter, the current parameter and the impedance sudden change.
5. A low voltage grid power supply network topology identification apparatus, the apparatus comprising:
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;
the first topology identification module is used for identifying the topology of the branch power supply network after clock synchronization of the low-voltage transformer area is carried out, and is specifically used for acquiring the voltage and current transient quantities of the branch power supply network; analyzing the transient voltage and current quantities; determining a voltage parameter, a current parameter and an impedance mutation according to the analysis result; searching and confirming time similarity according to the voltage parameter, the current parameter and the impedance mutation; identifying a branch power supply network topology according to the time similarity;
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.
6. The apparatus of claim 5, 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.
7. The apparatus of claim 5, wherein the first 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.
8. The apparatus of claim 5, 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 parameters, current parameters and impedance sudden changes according to the topology of a meter-based power supply network;
and identifying the meter power supply network topology according to the voltage parameter, the current parameter and the impedance sudden change.
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| CN111366801B (en) * | 2020-03-24 | 2022-06-24 | 青岛联众芯云科技有限公司 | Method for identifying topology of switch in transformer area |
| CN111817289B (en) * | 2020-06-08 | 2021-12-17 | 华南理工大学 | Low-voltage distribution station physical topology identification method, device, system, terminal and medium |
| CN112787402B (en) * | 2021-01-21 | 2023-05-26 | 中电华瑞技术有限公司 | District switch physical topology identification method based on power grid full data acquisition |
| CN113300356B (en) * | 2021-05-10 | 2022-05-10 | 浙江华云电力工程设计咨询有限公司 | Low-voltage distribution area topology identification method |
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