CN111983375A - Power distribution station topology method and identification system based on electricity utilization characteristics - Google Patents
Power distribution station topology method and identification system based on electricity utilization characteristics Download PDFInfo
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
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- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
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Abstract
The invention relates to a power distribution station topology method and an identification system based on power utilization characteristics. A power distribution station topology identification method based on power utilization characteristics comprises the following steps: s1, setting clocks for the topology concentrator and all the topology identification devices in the local area to be synchronous; s2, detecting the current characteristics of the installation nodes by the topology identification device, and recording a primary power utilization characteristic event when power utilization characteristic data appear in the circuit; s3, searching a plurality of electricity utilization characteristic events with the same occurrence time points and electricity utilization characteristic values; s4, determining the attribution relationship of the corresponding topology identification device according to the magnitude relationship of the total line current; and S5, constructing a complete distribution station topological relation table. A topology generating device does not need to be added, and a topology identifying device is required to be used for identifying the total current and the electricity utilization characteristic value of the line, so that the redundant interference load of the transformer area is reduced, and the safety is higher.
Description
Technical Field
The invention relates to a power distribution system, in particular to a power distribution station topology method and an identification system based on power utilization characteristics.
Background
The low voltage distribution station area is large in quantity, the electrical wiring is complex, the power supply cable is often laid through an underground pipeline, the electrical connection is complex, irregular electrical connection is also existed, and the electrical topological condition of the station area is difficult to accurately master. With the enhancement of the fine management of the power distribution network, the work of fault positioning and emergency repair, fault study and judgment, line loss management, transformer area heavy load management and the like needs to be based on accurate transformer area electrical topology information, so that it is necessary to accurately identify the topological information of the power distribution transformer area through technical means.
The current common topology identification method for the power distribution area comprises the following steps: (1) based on the power line carrier communication technology, including narrowband carrier or broadband carrier, the routing information passing through the carrier module is converted into preliminary topology information. The method is simple to implement, hardware investment is not increased, but the electrical topological data are influenced by the carrier communication route, and the accuracy is not high. (2) The method is characterized in that a topology generating device is additionally arranged at the tail end of the low-voltage distribution line, a special load is incorporated into the topology generating device at the tail end to generate current pulse change, a current path branch node identifies the current pulse change, but a non-current path branch does not identify the current pulse change, so that all branch paths are calculated, and integral topology data are obtained. The scheme is high in calculation accuracy, but topology generation devices need to be added, and redundant interference load is increased in a platform area.
Patent No. ZL201911053139.1 discloses a method for identifying topology of a distribution area, in which a concentrator and other devices in the distribution area freeze data, the concentrator collects data of the concentrator and other devices in the distribution area, and topology level calculation is performed after electrical devices not in the distribution area are excluded. According to the station area topology identification method provided by the invention, based on the hardware performance improvement of the concentrator, the attribution identification is carried out on the electric equipment in the station area by using the characteristic gradient matching algorithm, and then the period frozen electric quantity accumulation and matching algorithm is used for carrying out the topology level calculation on the electric equipment in the station area, so that the topology identification of the electric equipment in the power grid station area is realized, other auxiliary equipment is not required to be accessed, the station area topology identification cost of the power grid station area is favorably reduced, the line loss and the problem analysis can be calculated in real time, the operation and management efficiency is improved, but the accuracy in the aspect of accuracy is still insufficient, and the problems still exist.
Therefore, the existing identification of the topology of the cell is not sufficient, and needs to be improved and enhanced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a power distribution area topology method and an identification side system based on power utilization characteristics.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power distribution station topology identification method based on power utilization characteristics comprises the following steps:
s1, setting clocks for the topology concentrator and all the topology identification devices in the local area to be synchronous;
s2, detecting the current characteristics of the installation nodes by the topology identification device, and recording a primary power utilization characteristic event when power utilization characteristic data appear in the circuit; the electricity utilization characteristic events comprise electricity utilization characteristic values, total line current of the installation nodes and occurrence time;
s3, the topology concentrator acquires all the electricity utilization characteristic events recorded by all the topology recognition devices at a time at preset time intervals, and searches a plurality of electricity utilization characteristic events with the same occurrence time points and electricity utilization characteristic values;
s4, sorting the total line current in the plurality of electricity utilization characteristic events obtained after screening and matching in the step S3, and determining the attribution relationship of the corresponding topology recognition device according to the size relationship of the total line current;
and S5, matching all the electricity utilization characteristic events in each topology recognition device, and constructing a complete distribution substation topology relation table.
Preferably, the power utilization characteristic-based power distribution station topology identification method further includes the steps of:
and S6, acquiring the total line current data of all the topology identification devices in the power distribution area once by using the topology concentrator, and verifying the topology relation table.
In the power distribution station topology identification method based on the electricity utilization characteristics, the time synchronization error between the topology concentrator and all the topology identification devices is 1 s.
A power utilization characteristic-based power distribution station topology recognition system using the topology recognition method comprises a topology concentrator and a plurality of topology recognition devices; the topology identification devices are respectively arranged on branch nodes of the power distribution area, and the topology concentrator is arranged at the position of a main switch of the power distribution area;
the topology identification devices are respectively in communication connection with the topology concentrator and used for detecting power utilization characteristic data in a distribution line and sending the power utilization characteristic data to the topology concentrator;
the topology concentrator is used for receiving the electricity utilization characteristic data sent by each topology identification device and constructing a power distribution station topology information table.
Preferably, the power utilization characteristic-based power distribution station topology identification system comprises a topology identification device and a topology identification device, wherein the topology identification device comprises an identification processor, an identification detection module, an identification communication module and an identification power supply; the identification detection module and the identification communication module are respectively connected with the identification processor; the identification power supply is respectively connected with the identification processor and the identification communication module.
Preferably, the power utilization characteristic-based power distribution station topology identification system comprises an identification detection module, a power utilization characteristic-based power distribution station topology identification module and a power utilization characteristic identification module, wherein the identification detection module comprises a current detection unit, a voltage detection unit, an analog-to-digital converter and a line access unit;
the line access unit is used for connecting a distribution line;
the current detection unit is connected with the line access unit and used for detecting current data of a distribution line and transmitting the current data to the analog-to-digital converter;
the voltage detection unit is connected with the line access unit and used for detecting voltage data of a distribution line and transmitting the voltage data to the analog-to-digital converter;
and the analog-to-digital converter performs analog-to-digital conversion on the received current data and voltage data and transmits the current data and the voltage data to the identification processor.
Preferably, in the power utilization characteristic-based distribution substation topology identification system, the current detection unit includes 3 current transformers.
Preferably, the power utilization characteristic-based power distribution station topology identification system includes a carrier communication device, a micro-power wireless communication device, and an LoRa communication device.
Preferably, the power utilization characteristic-based power distribution station topology identification system includes: a switching power supply and a backup power supply; the switching power supply is connected with the line access unit.
Preferably, the power utilization characteristic-based power distribution station topology identification system includes a topology concentrator, which includes a centralized processor and a centralized communication module;
the centralized communication module is connected with the centralized processor and is used for data exchange between the centralized processor and a plurality of topology identification devices;
and the centralized processor is used for generating a distribution substation topology information table by using the electricity utilization characteristic data sent by the plurality of topology identification devices.
Compared with the prior art, the power distribution station topology method and the power distribution station identification system based on the power utilization characteristics have the following beneficial effects:
the method adopts the electricity utilization characteristic value (namely current variation) generated by identifying the load variation of the transformer area, the current variation occurrence time and the total line current at the moment to identify the electrical topology data, and can accurately identify the current variation branch and the non-current variation branch based on a data analysis method, thereby calculating all branch paths with high accuracy; and a topology generating device is not required to be added, and a topology identifying device is required to be used for identifying the total current and the electricity utilization characteristic value of the line, so that the redundant interference load of the transformer area is reduced, and the safety is higher.
Drawings
FIG. 1 is a flow chart of a topology identification method provided by the present invention;
FIG. 2 is a block diagram of a topology recognition apparatus according to the present invention;
FIG. 3 is a block diagram of a recognition module in the topology recognition apparatus according to the present invention;
FIG. 4 is a diagram of one embodiment of a topology identification architecture provided by the present invention;
5-9 are flow charts of the identification process of the power distribution station topology identification method based on the power utilization characteristics provided by the invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 5, the present invention provides a power distribution station topology identification system based on power utilization characteristics, which includes a topology concentrator T1 and a plurality of topology identification devices F1 to F20; the topology identification devices F1-F20 are respectively arranged on branch nodes of the power distribution area, and the topology concentrator T1 is arranged at the position of a main switch of the power distribution area;
a plurality of topology recognition devices F1-F20 are respectively connected with the topology concentrator T1 in a communication mode and used for detecting power utilization characteristic data in a distribution line and sending the power utilization characteristic data to the topology concentrator T1;
the topology concentrator T1 is configured to receive the power utilization characteristic data sent by each of the topology recognition devices F1-F20, and construct a power distribution area topology information table.
Specifically, the topology concentrator T1 and the topology recognition devices F1 to F20 may be devices originally installed in the distribution room and having a data concentration function and an electricity consumption characteristic signal recognition function, or may be the topology concentrator T1 or the topology recognition devices F1 to F20 provided by the present invention. The key points of the distribution station area are positions of branch lines, low-voltage branch box outgoing lines, overhead branch lines, meter boxes and the like, and if equipment with characteristic signals for identifying electricity utilization is originally installed at the key points, the topology identification devices F1-F20 provided by the invention can be not additionally installed. The topology concentrator T1 and the topology recognition devices F1 to F20 preferably perform bidirectional Communication by HPLC (high speed Power Line Communication) or micropower wireless Communication.
Preferably, in this embodiment, the topology identification devices F1 to F20 include an identification processor 1, an identification detection module 2, an identification communication module 3, and an identification power supply 4; the identification detection module 2 and the identification communication module 3 are respectively connected with the identification processor 1; the identification power supply 4 is respectively connected with the identification processor 1 and the identification communication module 3. The identification processor 1 is preferably an MCU (micro controller Unit), and the specific model is not limited; the identification detection module 2 is used for detecting power utilization characteristic data on a line where the identification detection module is located, wherein the power utilization characteristic data comprise a power utilization characteristic value, total line current and occurrence time; the electricity utilization characteristic value is an electricity utilization characteristic change value (namely current change generated in the distribution line when a load is powered up/down), and the current amplitude is subtracted by the current under the line stable state; the total line current is the present current magnitude (i.e., the magnitude of the current when the load is powered up/down). The identification communication module 3 is preferably an HPLC communication device or a micropower wireless communication device. The identification power supply 4 is configured to supply power to the identification communication module 3 and the identification processor 1, wherein a power supply with a voltage of 12V is provided to the identification communication module 3, a power supply with a voltage required by a general MCU is provided to the identification processor 1, preferably, a power supply with a voltage of 3.3V is provided to the identification processor 1, and the power supply with 3.3V is obtained by a DC-to-DC (direct current/direct current) transformer (not shown).
Preferably, in this embodiment, the identification detection module 2 includes a current detection unit 21, a voltage detection unit 22, an analog-to-digital converter 23, and a line access unit 24; the current detection unit 21 comprises a plurality of current transformers, the voltage detection unit 22 comprises a plurality of voltage transformers, and the analog-to-digital converter 23 is respectively connected with the plurality of current transformers and the plurality of voltage transformers and respectively sends the converted data to the identification processor 1; preferably, the number of the current transformers and the number of the voltage transformers are both 3;
the line access unit 24 is used for connecting a distribution line, preferably a connection terminal of the line, and can access a three-phase line of the distribution line;
the current detection unit 21 is connected to the line access unit 24, and is configured to detect current data of a distribution line and transmit the current data to the analog-to-digital converter 23;
the voltage detection unit 22 is connected to the line access unit 24, and is configured to detect voltage data of a distribution line, and transmit the voltage data to the analog-to-digital converter 23;
the Analog-to-Digital Converter 23 performs Analog-to-Digital conversion on the received current data and voltage data, and then transmits the current data and voltage data to the identification processor 1, preferably, the Analog-to-Digital Converter 23 is respectively connected to an ADC (Analog-to-Digital Converter) channel on the identification processor 1, so that data are not disturbed on the basis of improving the detection accuracy.
Preferably, in this embodiment, the identification communication module 3 includes a carrier communication device, a micro-power wireless communication device, and an LoRa communication device.
Preferably, in this embodiment, the identification power source 4 includes: a switching power supply and a backup power supply; the switching power supply is connected to the line access unit 24. Specifically, the switching power supply is preferably an AC-DC (alternating current/direct current) switching power supply, and is connected to the distribution line through the line access unit 24, so that the voltage in the normal distribution line can be converted into a power supply direct current power supply used by the device, and the power supply direct current power supply is generally converted into a 12V or 24V direct current power supply.
Preferably, in this embodiment, the topology concentrator T1 includes a centralized processor and a centralized communication module;
the centralized communication module is connected with the centralized processor and is used for data exchange between the centralized processor and a plurality of topology identification devices F1-F20;
and the centralized processor is used for generating a distribution substation topology information table by using the electricity utilization characteristic data sent by the plurality of topology recognition devices F1-F20. Preferably, the centralized communication module is adapted and matched with the identification communication module 3, i.e. preferably an HPLC communication device or a micropower wireless communication device. Preferably, the topology concentrator T1 and the plurality of topology recognition devices F1 to F20 all use the same device, in this embodiment, the used internal modules of the device all use the same module structure as the topology recognition device, and the specific implementation process is not described in detail.
Specifically, referring to fig. 4, in the preferred embodiment, the topology concentrator T1 and the topology recognizing devices F1 to F20 are each composed of a three-phase current transformer, a three-phase voltage transformer, a power module, a CPU, an AD (analog-to-digital converter), a FLASH (storage), a clock, and a carrier module (communication module), and collect and calculate three-phase currents, three-phase voltages, power factors, and electric quantity values of a circuit; the electrical components in fig. 4 correspond to the modules in fig. 2 and 3, and are not described in detail.
Accordingly, please refer to fig. 1 and fig. 5 to 9, the present invention further provides a topology identification method using the power utilization characteristic-based power distribution grid topology identification system, including:
s1, setting clock synchronization between the topology concentrator T1 in the local area and all the topology identification devices F1-F20; preferably, the time synchronization precision between the topology concentrator T1 and the topology recognition devices F1 to F20 is 1s, so that in the same area, when the electricity utilization characteristic data occurs, the topology concentrator T1 and the topology recognition devices F1 to F20 can detect within 1s (for example, 200ms) of a phase difference, and the synchronization precision between the two is 1s, the electricity utilization characteristic data can be regarded as occurring at the same time;
s2, the topology recognition devices F1-F20 detect the current characteristics of the installation nodes, and when electricity utilization characteristic data occur in the circuit, a one-time electricity utilization characteristic event m is recorded; the electricity utilization characteristic event comprises an electricity utilization characteristic value delta I, a total line current I of the installation node and occurrence time t;
s3, the topology concentrator T1 obtains all the electricity consumption characteristic events recorded by all the topology recognition devices F1 to F20 at a predetermined time interval, that is, the electricity consumption characteristic event set M ═ M recorded by the topology recognition devices F1 to F20 is obtained1,m2,…，mnFinding a plurality of electricity utilization characteristic events m with the same occurrence time point t and the electricity utilization characteristic value delta IiAre respectively denoted as M1、M2、…、Mn；
S4, sorting the total line current I in the plurality of electricity utilization characteristic events obtained after screening and matching in the step S3, determining the attribution relations of the corresponding topology recognition devices F1-F20 according to the size relation of the total line current I, and at the moment, recognizing the attribution relations of all the topology recognition devices F1-F20 of one topology line; the high total current I of the line is a superior node or a father node; the lower node or the sub-node is the line total current I;
and S5, matching all the electricity utilization characteristic events in each topology recognition device F1-F20, and constructing a complete distribution substation topology relation table. Of course, if none of the plurality of current signature events recorded by any of the topology recognition devices F1 to F20 can determine an electrical branch circuit or a hierarchical relationship, that is, if the occurrence time t of the current signature event is unique, it is determined that the nodes corresponding to the topology recognition devices F1 to F20 do not belong to the local area. The topology identification devices F1-F20 which are not in the local area do not need to be taken out in advance, and the method is convenient and quick.
As a preferable scheme, in this embodiment, the method further includes the steps of:
and S6, acquiring the total line current data of all the topology identification devices F1-F20 in the current distribution area at a time by using the topology concentrator T1, and checking the topology relation table.
Specifically, a power distribution area with a 3-level topology structure is taken as an example, and the following is described in detail:
assume that a certain distribution area is constructed as follows: 1 main switch, 4 second grade branch switches, 4 low pressure feeder spurs, 4 outgoing lines of 1 inlet wire of every feeder spurs, and specific topological situation is unknown.
And step S1, installing topology recognition devices F1-F20 on key nodes of the power distribution station area. Wherein, 1 topology concentrator T1 is installed at the master switch, 4 secondary branch switches are installed with topology identification devices, 4 outgoing lines of each low-voltage branch box are installed with topology identification devices, and 4 low-voltage branch boxes are installed with 16 topology identification devices in total. The total number of the distribution station areas is 1 topology concentrator T1, and 20 topology identification devices F1-F20. The topology concentrator is labeled T1, and the topology recognition devices are labeled F1-F20. At this time, the electrical topology is unknown. The communication addresses of the topology identification devices F1 to F20 are bound to physical installation locations. The whole topological structure can be deduced according to the corresponding relation between the communication address and the physical address as long as the whole electric topological structure is identified.
In step S2, the topology concentrator T1 performs clock synchronization operation on the topology recognizing devices F1 to F20. The topology concentrator T1 and the topology recognition devices F1-F20 adopt HPLC communication, and the time error of all the topology concentrators T1 and the topology recognition devices F1-F20 does not exceed 1 second.
In step S3, the topology identification devices F1-F20 detect and freeze the current change characteristics, and the current change of a branch can only cause the current change of the upstream parent node branch due to the unidirectional conductivity of the current, and the current change of the upstream parent node branch has no change of the sibling branch current, and as long as enough time is kept, the time of the change of each branch current can be staggered to exceed the clock error, so that the local electrical topology can be identified according to the current change condition of each branch, and the overall electrical topology information can be calculated step by step according to the current change characteristic data.
Step S31, the topology concentrator T1 is initialized as a trunk and the topology identification devices F1 to F20 are all initialized as secondary branches.
Step S32, the current of the distribution area changes along with the electricity consumption of the user, and a certain occurrence time t1One load changes, and the generated current change is an electricity utilization characteristic value delta I1The topology identification device is clocked, and assuming that there are 2 topology identification devices (e.g., F1 and F2) recording the current change, two electricity utilization characteristic events occur, respectively, and are respectively labeled as m1(F1,IF1,△I1,t1)、m2(F2,IF2,△I1,t1) And total line current I of F1F1Greater than F2 total line current IF2Thus, it can be calculated that F1 is a secondary branch, F2 is a tertiary branch, and F2 is a sub-branch of F1, and a local topology information is calculated. E.g. at t1Time, load change event occurs, a certain load is powered on, current increment change of 7A is generated, and the power utilization characteristic event is m1(F1,70A,7A,t1)、m2(F2,25A,7A,t1) (ii) a Two recorded times of occurrence t1The electrical characteristic values DeltaI are the same, so that F1 and F2 are judged to belong to the same branch; further judging that the total line current 70A of the F1 is larger than the total line current 25A of the F2, so that the F1 is judged to be a secondary branch, the F2 is a tertiary branch, the F2 is a sub-branch of the F1, and local topological information is calculated
Step S33, similar to S32, the second effective current change occurrence time t2There are another 2 topology recognition devices (for example, F3 and F4) which record the current variation as electricity utilization characteristic value Δ I2Are respectively marked as m3(F3,IF3,△I2,t2)、m4(F4,IF4,△I2,t2) Time of occurrence t2Same, electricity utilization characteristic value delta I2Same, and total line current I of F3F3Total line current I greater than F4F4Thus, it can be calculated that F3 is the secondary branch, F4 is the tertiary branch, and F4 is the subbranch of F3. At time t2, a load change event has occurred, a load has been shut down, there is a 5A current reduction change, and the topology identification deviceSetting F3 to record the electricity utilization characteristic event: m is3(F3,85A,-5A,t2) (ii) a The topology identification means F4 records the electricity usage characteristic event: m is4(F4,55A,-5A,t2) (ii) a Two recorded times of occurrence t2Identical, and Δ I identical, thereby determining F3, F4 as belonging to the same branch; further, it is determined that the total line current of F3 is greater than the total line current of F4, thereby determining that F3 is the secondary branch, F4 is the tertiary branch, and F3 is the sub-branch of F1
When there is a third effective current change occurring time t3There are 2 topology recognition devices (e.g., F3 and F5) that record the amount of current change as a power consumption characteristic value Δ I3Denoted m5(F3,IF3,△I3,t3)、m6(F5,IF5,△I3,t3) Time t3Same, electricity utilization characteristic value delta I3Same, and total line current I of F3F3Total line current I greater than F5F5Thus, it can be calculated that F3 is the secondary branch, F5 is the tertiary branch, and F5 is the subbranch of F3; e.g. at t3Time, time of change of load, start of a certain load, change of current increase of 8A, topology identification means F3 records electricity usage characteristic event: m is5(F3,91A,6A,t3) (ii) a The topology identification device F5 records the electricity utilization characteristic event as: m is6(F5,36A,6A,t3) (ii) a Occurrence time t of two electricity utilization characteristic event records3The electrical characteristic values Δ I are the same, so that F3 and F5 are judged to belong to the same branch; further determining that the total current of the F3 line is greater than the total current of the F5 line, F3 is determined to be the secondary branch, F5 is the tertiary branch, and F5 is the sub-branch of F3.
Repeating the steps S32 and S33 for a sufficient time until each branch detects a valid current change event, the overall electrical topology information can be obtained.
And the current amplitude of the parent node F3 is equal to the sum of the current amplitude of the child node F4 and the current amplitude of the child node F5, a local topology information can be calculated. Thus, it is calculated that the parent node F3 has 2 child nodes, F4 and F5 are child nodes, and the total line current of F3, F4 and F5 is used for verificationCalculation of IF3(91A)＝IF4(55A)+IF5(36A) And calculating local topological information.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. A power distribution station topology identification method based on power utilization characteristics is characterized by comprising the following steps:
s1, setting clocks for the topology concentrator and all the topology identification devices in the local area to be synchronous;
s2, detecting the current characteristics of the installation nodes by the topology identification device, and recording a primary power utilization characteristic event when power utilization characteristic data appear in the circuit; the electricity utilization characteristic events comprise electricity utilization characteristic values, total line current of the installation nodes and occurrence time;
s3, the topology concentrator acquires all the electricity utilization characteristic events recorded by all the topology recognition devices at a time at preset time intervals, and searches a plurality of electricity utilization characteristic events with the same occurrence time points and electricity utilization characteristic values;
s4, sorting the total line current in the plurality of electricity utilization characteristic events obtained after screening and matching in the step S3, and determining the attribution relationship of the corresponding topology recognition device according to the size relationship of the total line current;
and S5, matching all the electricity utilization characteristic events in each topology recognition device, and constructing a complete distribution substation topology relation table.
2. The power usage feature based power distribution substation topology identification method according to claim 1, further comprising the steps of:
and S6, acquiring the total line current data of all the topology identification devices in the power distribution area once by using the topology concentrator, and verifying the topology relation table.
3. The power utilization feature-based distribution substation topology identification method according to claim 1, wherein the time synchronization error of said topology concentrator with all said topology identification devices is 1 s.
4. A power usage characteristic-based distribution substation topology identification system using the topology identification method according to any one of claims 1 to 3, characterized by comprising a topology concentrator and a plurality of topology identification devices; the topology identification devices are respectively arranged on branch nodes of the power distribution area, and the topology concentrator is arranged at the position of a main switch of the power distribution area;
the topology identification devices are respectively in communication connection with the topology concentrator and used for detecting power utilization characteristic data in a distribution line and sending the power utilization characteristic data to the topology concentrator;
the topology concentrator is used for receiving the electricity utilization characteristic data sent by each topology identification device and constructing a power distribution station topology information table.
5. The power usage feature based distribution substation topology identification system according to claim 4, wherein said topology identification means comprises an identification processor, an identification detection module, an identification communication module, an identification power source; the identification detection module and the identification communication module are respectively connected with the identification processor; the identification power supply is respectively connected with the identification processor and the identification communication module.
6. The power utilization feature-based distribution substation topology identification system according to claim 5, wherein said identification detection module comprises a current detection unit, a voltage detection unit, an analog-to-digital converter and a line access unit;
the line access unit is used for connecting a distribution line;
the current detection unit is connected with the line access unit and used for detecting current data of a distribution line and transmitting the current data to the analog-to-digital converter;
the voltage detection unit is connected with the line access unit and used for detecting voltage data of a distribution line and transmitting the voltage data to the analog-to-digital converter;
and the analog-to-digital converter performs analog-to-digital conversion on the received current data and voltage data and transmits the current data and the voltage data to the identification processor.
7. The power usage feature based distribution substation topology identification system according to claim 6, wherein said current detection unit comprises 3 current transformers.
8. The power usage feature-based distribution substation topology identification system according to claim 5, wherein said identification communication module comprises a carrier communication device, a micro-power wireless communication device, a LoRa communication device.
9. The power usage feature based power distribution grid topology identification system of claim 5, wherein the identifying a power source comprises: a switching power supply and a backup power supply; the switching power supply is connected with the line access unit.
10. The power usage feature based distribution substation topology identification system according to claim 4, wherein said topology concentrator comprises a centralized processor and a centralized communication module;
the centralized communication module is connected with the centralized processor and is used for data exchange between the centralized processor and a plurality of topology identification devices;
and the centralized processor is used for generating a distribution substation topology information table by using the electricity utilization characteristic data sent by the plurality of topology identification devices.
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