CN111262340A - Low-voltage distribution network topology identification system and method based on power line carrier N-line current monitoring - Google Patents
Low-voltage distribution network topology identification system and method based on power line carrier N-line current monitoring Download PDFInfo
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- 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
- Y04S40/12—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 characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/121—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 characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission
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Abstract
The invention discloses a low-voltage distribution network topology identification system based on power line carrier N-line current monitoring, which consists of a concentrator and a plurality of topology identification devices, wherein the topology identification devices are respectively arranged on branch boxes of a power grid with a topological relation to be identified; the topology recognizing apparatus includes: the topology identification processing terminal is arranged at a bus end of the branch box and is used for finishing processing of monitoring signals; the N-line carrier signal sensor is arranged on the N line of each branch line to complete the monitoring of the current signal of the past power carrier; the topology identification processing terminal is electrically connected with the concentrator. Through the structural arrangement of the system, the system only needs to be provided with the sleeve device on the branch node, and does not need to be provided with any device on the side of the electric meter, thereby reducing the installation complexity, improving the accuracy and reducing the investment cost.
Description
Technical Field
The invention belongs to the technical field of topology identification, and particularly relates to a low-voltage distribution network topology identification system and method based on power line carrier N-line current monitoring.
Background
In each link of 'transmission-transformation-distribution-use' of the intelligent power grid, the low-voltage transformer area directly provides the needed power for each part of the economy of the country and the life of people. In order to effectively improve power supply reliability, improve power supply quality, and improve operation management level and power supply service capability, power grid companies have strengthened platform district construction and investment in recent years. In planning, reconstruction and operation maintenance of cities and villages in various regions, the topological relation of a distribution network in a transformer area can be changed due to the change of distribution equipment in the distribution network along with the new construction, reconstruction, extension, operation, maintenance and repair of a power grid. In order to improve the power supply quality, it is necessary to grasp the "home-line-change" network topology relationship of the entire distribution area network system in real time.
The topological relation of traditional distribution transformer district electric network mainly relies on the topological data that the district was left when constructing, and this kind of mode needs the manual work to type in archives during initial installation, and work load is huge, and later stage also needs the manual work to type in the renewal if equipment replacement or circuit change appear. In actual use, logging errors or file updating is not timely, so that the topology of the actual power distribution network on site is inconsistent with the display of the main station.
Disclosure of Invention
The invention aims to solve the problems that the effect is not ideal in the practical application environment and the success rate of topology identification cannot meet the requirement in the prior art that a plurality of technical schemes for realizing topology based on power line carrier application exist. The system and the method for identifying the topology of the low-voltage distribution network based on the power line carrier N-line current monitoring greatly improve the accuracy of topology identification and reduce the implementation cost.
The purpose of the invention is realized by the following technical scheme:
a low-voltage distribution network topology identification system based on power line carrier N-line current monitoring is composed of a concentrator and a plurality of topology identification devices, wherein the topology identification devices are respectively arranged on branch boxes of a power grid to be identified in a topological relation; the topology recognizing apparatus includes at least: the system comprises an N-line carrier signal sensor and a topology identification processing terminal, wherein the N-line carrier signal sensor is electrically connected with the topology identification processing terminal, and the topology identification processing terminal is arranged at a bus end of the branch box and used for finishing processing of monitoring signals; the N-line carrier signal sensor is arranged on the N line of each branch line to complete the monitoring of the current signal of the past power carrier; the topology identification processing terminal is electrically connected with the concentrator.
According to a preferred embodiment, an RS485 bus is arranged between the N-line carrier signal sensor and the topology identification processing terminal, and the N-line carrier signal sensor sends the detected power carrier current signal to the topology identification processing terminal through the RS485 bus.
According to a preferred embodiment, the system workflow specifically includes the following steps: s1: the method comprises the steps that the number of each user electric meter in a transformer area and the total user electric meter quantity information are obtained based on a concentrator arranged on a power grid; s2: the concentrator respectively finishes sending a calling instruction to each intelligent electric meter based on the user electric meter information obtained in the step S1, a carrier module on each intelligent electric meter responds an electric signal based on the received calling instruction, and meanwhile, the concentrator obtains the ID and branch quantity information of each branch box device through a carrier specific broadcast command; s3: when the concentrator sends a test calling instruction to each intelligent electric meter in step S2, the N-line carrier signal sensor monitors signals and sends a monitoring structure to the topology identification processing terminal; s4: and the concentrator or the TTU monitors and reports the result based on the signal of each branch line collected by the topology identification processing terminal, analyzes and judges the topology result of the ammeter user, and forms the topology structure of the whole transformer area.
According to a preferred embodiment, when the N-line carrier signal sensor performs signal monitoring in step S3, the method specifically includes: the N-line carrier signal sensor sequentially monitors the carrier current of each intelligent electric meter in the distribution area, and reports the ID of the branch box and the serial number information of the branch line through the topology identification processing terminal when detecting that the N-line response current passes through the branch direct contact.
According to a preferred embodiment, in step S4, the concentrator forms a relation table corresponding to the electric meter based on the received report information.
According to a preferred embodiment, in step S4, the concentrator completes statistics and analysis of the electric meter relational tables based on a topological algorithm to generate a topological relational structure of the whole platform area.
The main scheme and the further selection schemes can be freely combined to form a plurality of schemes which are all adopted and claimed by the invention; in the invention, the selection (each non-conflict selection) and other selections can be freely combined. The skilled person in the art can understand that there are many combinations, which are all the technical solutions to be protected by the present invention, according to the prior art and the common general knowledge after understanding the scheme of the present invention, and the technical solutions are not exhaustive herein.
The invention has the beneficial effects that: through the structural arrangement of the system, the system only needs to be provided with the sleeve device on the branch node, and does not need to be provided with any device on the side of the electric meter, thereby reducing the installation complexity, improving the accuracy and reducing the investment cost.
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FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic workflow diagram of the system of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that, 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 are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations and positional relationships that are conventionally used in the products of the present invention, and are used merely for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, it should be noted that, in the present invention, if the specific structures, connection relationships, position relationships, power source relationships, and the like are not written in particular, the structures, connection relationships, position relationships, power source relationships, and the like related to the present invention can be known by those skilled in the art without creative work on the basis of the prior art.
Example 1:
referring to fig. 1, the invention discloses a low-voltage distribution network topology identification system based on power line carrier N-line current monitoring. The system greatly improves the accuracy of topology identification and reduces the implementation cost.
Preferably, the topology identification system is composed of a concentrator and a plurality of topology identification devices, and the topology identification devices are respectively installed on branch boxes of the power grid with the topology relationship to be identified. The topology identification processing terminal is electrically connected with the concentrator.
Preferably, the topology recognizing apparatus includes at least: the device comprises an N-line carrier signal sensor and a topology recognition processing terminal, wherein the N-line carrier signal sensor is electrically connected with the topology recognition processing terminal. The topology identification processing terminal is arranged at a bus end of the branch box and used for finishing processing of monitoring signals; the N-line carrier signal sensor is arranged on the N line of each branch line to complete the monitoring of the current signal of the past power carrier.
Furthermore, an RS485 bus is arranged between the N-line carrier signal sensor and the topology recognition processing terminal, and the N-line carrier signal sensor sends the detected power carrier current signal to the topology recognition processing terminal through the RS485 bus.
Referring to fig. 2, the system workflow specifically includes the following steps:
s1: and acquiring the serial numbers of the user electric meters and the total number information of the user electric meters in the transformer area based on a concentrator arranged on the power grid.
S2: the concentrator respectively finishes sending the calling instruction to each intelligent electric meter based on the user electric meter information obtained in the step S1, the carrier modules on each intelligent electric meter respond to the electric signals based on the received calling instruction, and meanwhile, the concentrator obtains the ID and branch quantity information of each branch box device through a carrier specific broadcast command.
S3: and the N-line carrier signal sensor monitors signals when the concentrator sends a test calling instruction to each intelligent electric meter in the step S2, and sends a monitoring structure to the topology identification processing terminal.
Preferably, in step S3, when the N-line carrier signal sensor monitors signals, the method specifically includes: the N-line carrier signal sensor sequentially monitors the carrier current of each intelligent electric meter in the distribution area, and reports the ID of the branch box and the serial number information of the branch line through the topology identification processing terminal when detecting that the N-line response current passes through the branch direct contact.
S4: and the concentrator or the TTU monitors and reports the result based on the signal of each branch line collected by the topology identification processing terminal, analyzes and judges the topology result of the ammeter user, and forms the topology structure of the whole transformer area.
Preferably, in step S4, the concentrator forms a relationship table corresponding to the electric meter based on the received report information.
According to the national power grid and southern power grid specifications on power line carrier communication, the frequency of narrow-band carrier communication is 10-500KHz, and the frequency of broadband carrier communication is 2-2 MHz. Different from the power frequency current, for the high-frequency signal current of the frequencies, the equivalent circuit of the low-voltage transformer area presents low impedance, so that most of the current on the N line flows to the transformer side of the transformer area and is converged into the ground through the grounding of the transformer side. That is, the topology of each branch line can be accurately determined according to the current flow direction on the N line.
Preferably, in step S4, the concentrator completes statistics and analysis of the electric meter relational tables based on a topological algorithm to generate a topological relational structure of the whole platform area.
Through the structural arrangement of the system, the system only needs to be provided with the sleeve device on the branch node, and does not need to be provided with any device on the side of the electric meter, thereby reducing the installation complexity, improving the accuracy and reducing the investment cost.
The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will. Numerous combinations will be known to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A low-voltage distribution network topology identification system based on power line carrier N-line current monitoring is characterized in that the topology identification system is composed of a concentrator and a plurality of topology identification devices, wherein the topology identification devices are respectively arranged on branch boxes of a power grid with a topological relation to be identified;
the topology recognizing apparatus includes at least: the system comprises an N-line carrier signal sensor and a topology identification processing terminal, wherein the N-line carrier signal sensor is electrically connected with the topology identification processing terminal,
the topology identification processing terminal is arranged at a bus end of the branch box and used for finishing processing of monitoring signals;
the N-line carrier signal sensor is arranged on the N line of each branch line to complete the monitoring of the current signal of the past power carrier;
the topology identification processing terminal is electrically connected with the concentrator.
2. The low-voltage distribution network topology identification system based on power line carrier N-line current monitoring as claimed in claim 1, wherein an RS485 bus is arranged between the N-line carrier signal sensor and the topology identification processing terminal,
and the N-line carrier signal sensor sends the detected power carrier current signal to the topology identification processing terminal through the RS485 bus.
3. The system for identifying the topology of the low-voltage distribution network based on the monitoring of the N-line current of the power line carrier as claimed in claim 1, wherein the system work flow specifically comprises the following steps:
s1: the method comprises the steps that the number of each user electric meter in a transformer area and the total user electric meter quantity information are obtained based on a concentrator arranged on a power grid;
s2: the concentrator respectively finishes sending a calling instruction to each intelligent electric meter based on the user electric meter information obtained in the step S1, a carrier module on each intelligent electric meter responds an electric signal based on the received calling instruction, and meanwhile, the concentrator obtains the ID and branch quantity information of each branch box device through a carrier specific broadcast command;
s3: when the concentrator sends a test calling instruction to each intelligent electric meter in step S2, the N-line carrier signal sensor monitors signals and sends a monitoring structure to the topology identification processing terminal;
s4: and the concentrator or the TTU monitors and reports the result based on the signal of each branch line collected by the topology identification processing terminal, analyzes and judges the topology result of the ammeter user, and forms the topology structure of the whole transformer area.
4. The system for identifying topology of low-voltage distribution network based on power line carrier N-line current monitoring as claimed in claim 3, wherein said step S3 when said N-line carrier signal sensor monitors signals specifically includes:
the N-line carrier signal sensor sequentially monitors the carrier current of each intelligent electric meter in the distribution area, and reports the ID of the branch box and the serial number information of the branch line through the topology identification processing terminal when detecting that the N-line response current passes through the branch direct contact.
5. The system for identifying topology of low-voltage distribution network based on power line carrier N-line current monitoring as claimed in claim 4, wherein in step S4, the concentrator forms a relation table corresponding to the electric meter based on the received reported information.
6. The system for identifying topology of low-voltage distribution networks based on power line carrier N-line current monitoring as claimed in claim 5, wherein in step S4, said concentrator completes statistics and analysis of each electric meter relational table based on topology algorithm to generate topology relational structure of whole distribution area.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983375A (en) * | 2020-06-28 | 2020-11-24 | 威胜信息技术股份有限公司 | Power distribution station topology method and identification system based on electricity utilization characteristics |
| CN112039197A (en) * | 2020-07-21 | 2020-12-04 | 厦门亿力吉奥信息科技有限公司 | Automatic mapping method of distribution room topological graph and computer readable storage medium |
| CN112234712A (en) * | 2020-10-12 | 2021-01-15 | 国网河北省电力有限公司信息通信分公司 | Power distribution network topology identification method |
| CN112329630A (en) * | 2020-11-05 | 2021-02-05 | 四川能信科技股份有限公司 | Cable branch identification system and method based on carrier signal intensity distribution |
| CN112350865A (en) * | 2020-11-03 | 2021-02-09 | 广东电力通信科技有限公司 | Topology identification positioning method based on Wi-Fi probe and broadband wave communication technology |
| CN112564955A (en) * | 2020-11-30 | 2021-03-26 | 北京新源绿网节能科技有限公司 | Platform area topological method based on HPLC technology |
| CN113093063A (en) * | 2021-04-16 | 2021-07-09 | 航天中电科技(重庆)有限公司 | Meter box and household meter relation identification method and system based on current carrier |
| CN113312734A (en) * | 2021-05-12 | 2021-08-27 | 广东顺畅科技有限公司 | Electric meter network topology generation method and device and computer readable storage medium |
| CN115276715A (en) * | 2022-06-28 | 2022-11-01 | 航天中电(重庆)微电子有限公司 | Transformer area topological relation identification method based on characteristic current signals |
| CN117277546A (en) * | 2022-06-13 | 2023-12-22 | 上海正泰智能科技有限公司 | Topology identification method, equipment and system for power line and power distribution network |
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| CN112329630A (en) * | 2020-11-05 | 2021-02-05 | 四川能信科技股份有限公司 | Cable branch identification system and method based on carrier signal intensity distribution |
| CN112564955A (en) * | 2020-11-30 | 2021-03-26 | 北京新源绿网节能科技有限公司 | Platform area topological method based on HPLC technology |
| CN113093063B (en) * | 2021-04-16 | 2022-03-25 | 航天中电(重庆)微电子有限公司 | Meter box and household meter relation identification method and system based on current carrier |
| CN113093063A (en) * | 2021-04-16 | 2021-07-09 | 航天中电科技(重庆)有限公司 | Meter box and household meter relation identification method and system based on current carrier |
| CN113312734A (en) * | 2021-05-12 | 2021-08-27 | 广东顺畅科技有限公司 | Electric meter network topology generation method and device and computer readable storage medium |
| CN117277546A (en) * | 2022-06-13 | 2023-12-22 | 上海正泰智能科技有限公司 | Topology identification method, equipment and system for power line and power distribution network |
| CN115276715A (en) * | 2022-06-28 | 2022-11-01 | 航天中电(重庆)微电子有限公司 | Transformer area topological relation identification method based on characteristic current signals |
| CN115276715B (en) * | 2022-06-28 | 2023-09-22 | 航天中电(重庆)微电子有限公司 | Method for identifying topological relation of transformer area based on characteristic current signals and readable storage medium |
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