Power distribution zone identification method and system based on power line communication data

Abstract

The application discloses a power distribution area identification method and system based on power carrier communication data. According to the method, after a relay forwarding end receives a first power carrier signal sent by each carrier sending terminal, a second power carrier signal containing branch address information of the relay forwarding end, user address information corresponding to the carrier sending end and the first power carrier signal is sent to a carrier data receiving master station, so that the carrier data receiving master station can identify the house-line-transformer relationship of the power distribution area according to the branch address information of the relay forwarding end and the user address information. Meanwhile, a wave blocking module is arranged on the relay forwarding end, so that the signal received by the relay forwarding end cannot be transmitted to adjacent sections, the situation that the signal is transmitted to other branch lines of the power line is effectively reduced, the accuracy of the house-line-transformer relationship identification result of the power distribution area is improved, and therefore, the comprehensive monitoring of the user end electric energy can be accurately extended.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution area processing, in particular to a power distribution area identification method and system based on power carrier communication data. BACKGROUND

[0002] In the related art, power distribution area user identification is achieved by power inspection personnel in the area census, finding the corresponding user group on each phase line of the distribution transformer of the area from the distribution transformer of the area along the fire line, and counting and identifying the area information and user meter information through manual meter reading. This manual identification needs to count each household in the area, which is not only a large amount of work, but also has the problems of miscounting, missing counting and even false counting, so it is difficult to achieve fine segmentation of the load of the power distribution area.

[0003] With the emergence of intelligent identification methods, in the low-voltage power distribution system inspection process, two methods of power carrier communication or power carrier and pulse carrier hybrid communication are usually used to achieve automatic identification of power distribution area users. Although the power carrier communication method has a certain identification effect, it has the problems of unstable identification and inaccurate identification. However, the power carrier and pulse carrier hybrid communication method solves the problems of line connection and inaccurate identification in the power carrier identification method, but it needs to be used with a current clamp or a flexible coil, which has certain safety hazards in operation. Therefore, whether the power carrier communication method or the power carrier and pulse carrier hybrid communication method is used to identify the power distribution area users, manual measurement is still required to some extent, so there are still problems of miscounting, missing counting and even false counting. SUMMARY

[0004] The present application aims to solve at least one of the technical problems in the prior art. To this end, the present application provides a power distribution area identification method and system based on power carrier communication data, which can effectively improve the accuracy of the statistical results, so as to accurately expand the comprehensive monitoring of user end electric energy.

[0005] In one aspect, the present application provides a power distribution area identification method based on power carrier communication data, comprising the following steps:

[0006] The carrier sending terminal sends a first power carrier signal to the relay forwarding end;

[0007] The relay forwarding end forwards a second power carrier signal to the carrier data receiving master station, the second power carrier signal including branch address information of the relay forwarding end, corresponding user address information of the carrier sending end and the first power carrier signal; wherein the relay forwarding end is provided with a wave blocking module;

[0008] The carrier data receiving master station determines a power distribution substation identification result according to the branch address information of the relay forwarding end and the user address information.

[0009] In some embodiments, before the relay forwarding end receives the first power carrier signal, the method further comprises the following steps:

[0010] The first power carrier signal is amplified.

[0011] In some embodiments, before the relay forwarding end receives the first power carrier signal, the method further comprises the following steps:

[0012] The amplified first power carrier signal is subjected to coupling voltage transformation processing.

[0013] In some embodiments, the carrier sending terminal uses an OFDM digital modulation and demodulation mode to send the first power carrier signal to the relay forwarding end.

[0014] In some embodiments, after the relay forwarding end receives the first power carrier signal, the method further comprises the following steps:

[0015] The first power carrier signal is subjected to noise removal.

[0016] In some embodiments, after the relay forwarding end receives the first power carrier signal, the method further comprises the following steps:

[0017] The branch information to which the noise-removed first power carrier signal belongs is determined.

[0018] First power carrier signals belonging to the same branch are collected in the same set according to the branch information.

[0019] In some embodiments, after the relay forwarding end receives the first power carrier signal, the method further comprises the following steps:

[0020] The first power carrier signals in the same set are subjected to encoding and packaging processing.

[0021] In some embodiments, the determination of the power distribution substation identification result according to the branch address information of the relay forwarding end and the user address information comprises:

[0022] The complete path information of the user is restored according to the branch address information of the relay forwarding end and the user address information.

[0023] The power distribution substation identification result is generated according to the complete path information of the user.

[0024] In another aspect, the embodiment of the present application provides a power distribution area identification system based on power carrier communication data, comprising:

[0025] A carrier sending terminal is configured to send a first power carrier signal.

[0026] A relay forwarding end is configured to receive the first power carrier signal and send a second power carrier signal, wherein the second power carrier signal comprises branch address information of the relay forwarding end, user address information corresponding to the carrier sending terminal, and the first power carrier signal; and a wave blocking module is arranged on the relay forwarding end.

[0027] A carrier data receiving main station is configured to determine a power distribution area identification result according to the branch address information of the relay forwarding end and the user address information.

[0028] In some embodiments, the determination of the power distribution area identification result according to the branch address information of the relay forwarding end and the user address information comprises:

[0029] Restoring user complete path information according to the branch address information of the relay forwarding end and the user address information.

[0030] Generating a power distribution area identification result according to the user complete path information.

[0031] The embodiment of the present application provides a power distribution area identification method based on power carrier communication data, which has the following beneficial effects:

[0032] In the embodiment, after the relay forwarding end receives the first power carrier signal sent by each carrier sending terminal, the second power carrier signal containing the branch address information of the relay forwarding end, the user address information corresponding to the carrier sending terminal, and the first power carrier signal is sent to the carrier data receiving main station, so that the carrier data receiving main station can identify the user-line-transformer relationship of the power distribution area according to the branch address information of the relay forwarding end and the user address information. Meanwhile, the wave blocking module arranged on the relay forwarding end makes the signal received by the relay forwarding end not transmitted to the adjacent section, effectively reduces the situation that the signal is transmitted to other branch lines of the power line, and improves the accuracy of the user-line-transformer relationship identification result of the power distribution area, so that the comprehensive monitoring of the user end electric energy can be accurately extended.

[0033] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0034] The application will be further described below in conjunction with the accompanying drawings and embodiments, in which:

[0035] Figure 1 A power carrier communication data-based power distribution area identification method flow chart for an embodiment of the application;

[0036] Figure 2 A power carrier communication data-based power distribution area identification system schematic diagram for an embodiment of the application;

[0037] Figure 3 A schematic diagram of a specific implementation process for an embodiment of the application. DETAILED DESCRIPTION

[0038] Embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are only used to explain the application, and cannot be understood as a limitation on the application.

[0039] In the description of the application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and therefore cannot be understood as a limitation on the application. The device or element indicated is necessarily constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0040] In the description of the application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. is understood as not including the number, above, below, etc. is understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0041] In the description of the application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the application in conjunction with the specific content of the technical solution.

[0042] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0043] Efficient, fast and reliable identification of the relationship between the distribution area, line and user can realize intelligent management of the distribution area. Among them, the so-called line, transformer and user relationship refers to the power supply and use relationship between the line and transformer of the power supply enterprise and the user supplied by the transformer of the transformer area. Generally, each transformer has fixed users, and the power supply uses CAD drawings to draw this corresponding relationship as a record of the relationship between the transformer and the user. However, with the growth and change of the number of users, many corresponding relationships between power supply areas and users do not match the actual situation, resulting in difficulties for power supply units to reorganize line relationships, frequent faults, and line loss statistics errors. Typical errors include:

[0044] ① "house-transformer" corresponding relationship error, that is, file division error, loading the meter number of the transformer area (generally the adjacent transformer area) into the concentrator of the transformer area, which will directly affect the accuracy of the transformer line loss statistics;

[0045] ② "house-phase" relationship is not accurate, that is, the phase of the user meter is not correct or there is no phase, which makes it impossible to effectively balance the three-phase load when the three-phase load of the transformer area is unbalanced, resulting in reduced voltage quality and accelerated equipment life loss;

[0046] ③ "house-line" relationship is missing, that is, the line connection information between the user and the distribution transformer (referred to as distribution transformer) is missing, which makes it impossible to quickly and accurately determine the fault interval and power failure interval when the transformer area fails.

[0047] The traditional user identification of the distribution transformer area is to find the corresponding user group on each phase line of the transformer of the transformer area along the fire line by the power inspection personnel during the general survey of the transformer area, and the transformer information and user meter information are counted and identified by manual meter reading. This traditional manual identification needs to count every house and every user, which not only has a large amount of work, but also has the phenomenon of miscounting, missing counting and even false counting, which makes it difficult to realize the fine segmentation of the load of the distribution transformer area.

[0048] With the development of intelligent identification method, in the 0.4kV low-voltage distribution system inspection process, usually two methods of power carrier communication or power carrier and pulse carrier hybrid communication are used to realize the automatic identification of distribution area users. The power carrier communication is used to realize the identification of distribution area users, although there is a certain identification effect, but there are problems of unstable identification, inaccurate identification and so on. The power carrier and pulse carrier hybrid communication is used to realize the identification of distribution area users, although it solves the problems of line connection and inaccurate identification in the power carrier identification mode, but it needs to be used with current clamp or flexible coil, which has certain safety hazards in operation. Therefore, whether the power carrier communication or the power carrier and pulse carrier hybrid communication method is used to realize the identification of distribution area users, they still need a certain degree of manual measurement participation, which is difficult to meet the intelligent development needs of distribution area.

[0049] In order to automatically identify the low-voltage distribution area topology, avoid the problems of unstable identification, inaccurate identification and safety hazards in single power carrier communication and power carrier and pulse carrier hybrid communication, the embodiment combines the power carrier communication and the wave blocking module, and realizes the automatic identification of distribution area by cooperating with the strategy of layered and segmented communication of distribution area. The distribution area management and control system can not only monitor and protect the distribution transformer, but also efficiently and quickly identify the corresponding relationship between the distribution area and the user, and expand the comprehensive monitoring of the user end electric energy, so as to promote the construction of intelligent distribution area management and control system in line with the development of smart city.

[0050] The embodiments of the application will be described in detail below with reference to the accompanying drawings:

[0051] Referring to Figure 1 The embodiment of the application provides a distribution area identification method based on power carrier communication data, including but not limited to the following steps:

[0052] Step 110, the carrier sending terminal sends a first power carrier signal to the relay forwarding end;

[0053] Step 120, the relay forwarding end forwards a second power carrier signal to the carrier data receiving master station, the second power carrier signal includes branch address information of the relay forwarding end, user address information corresponding to the carrier sending end and the first power carrier signal; wherein, the relay forwarding end is provided with a wave blocking module;

[0054] Step 130, the carrier data receiving master station determines the distribution area identification result according to the branch address information of the relay forwarding end and the user address information.

[0055] In the embodiment of the application, as Figure 2As shown, a current carrier transmitting terminal is set up on the user side. This terminal includes a current carrier communication module and a controller; the communication module integrates a 32-bit processor. Specifically, the current carrier signal transmitted by the current carrier transmitting terminal needs to pass through an amplification circuit and a coupling transformer before reaching the relay relay end. Therefore, before receiving the first current carrier signal, the relay relay end amplifies the signal and performs coupling transformer processing on the amplified signal to facilitate reception of the signal from the current carrier transmitting terminal. When the current carrier transmitting terminal transmits the current carrier signal to the relay relay end, it can transmit the signal using OFDM digital modulation and demodulation. OFDM is a modern broadband wireless communication system application technology. To reduce distortion caused by the influence between channels in a high data rate OFDM system, a cyclic prefix (CP) is introduced to eliminate inter-symbol interference (ISI).

[0056] After receiving the power line carrier signal from the carrier transmitting terminal, the carrier relay relay receives the signal. Firstly, the processor identifies, aggregates, encodes, and packages the data. Then, it forwards the data packet containing the relay relay terminal's address information to communication segment two, where it is received by the carrier data receiving master station. The identification process involves denoising the power line carrier signal transmitted by the carrier transmitting terminal, removing interference signals and retaining the target signal, such as the target time-domain signal and the target frequency-domain signal. The aggregation process involves grouping the denoised power line carrier signals belonging to the same branch into a set. Specifically, this can be determined based on the branch information of each denoised power line carrier signal. Encoding involves encoding the power line carrier signals belonging to the same branch into a signal type that can be received by both the relay relay and the carrier data receiving master station, while also reducing the signal transmission volume and improving the channel transmission rate. After encoding, the encoded signals are packaged to allow simultaneous transmission of multiple signals, improving signal transmission efficiency.

[0057] On the other hand, such as Figure 2 As shown, the wave-blocking module inside the carrier relay relay terminal blocks the signal from the carrier transmitting terminal within communication segment two, preventing it from being transmitted to communication segment one. In this embodiment, because the wave-blocking module has good low-pass and high-impedance characteristics, its impedance to power frequency signals is not large (approximately 0.040Ω), which does not affect power frequency power transmission. However, it exhibits extremely high impedance (approximately 1000Ω) to high-frequency signals (50-300kHz), thus effectively preventing or attenuating high-frequency carrier signals from being transmitted to adjacent segments and preventing signals from being transmitted to other branches of the power line and causing interference.

[0058] In the embodiment of the present application, after the carrier data receiving master station receives the branch address information and user address information sent by the relay forwarding end, the user complete path information can be restored according to the branch address information and the user address information of the relay forwarding end, and then the power distribution area identification result is generated according to the user complete path information. Specifically, after the carrier data receiving master station receives the data sent by each carrier relay forwarding end, including the branch address information of the relay forwarding end, and the user address and information corresponding to the carrier sending terminal on the branch, etc., the number and distribution information of the users corresponding to the power distribution transformer can be accurately identified, and the accurate identification of the power distribution area users is realized.

[0059] For example, as shown in Figure 3 The branch 1 and the branch 2 each have N load users, and each load user is provided with a carrier sending terminal, and is marked as: for example, the branch 1 is 1-1, 1-2, 1-3,..., 1-N number of sending terminals; and the branch 2 is 2-1, 2-2, 2-3,..., 2-N number of user terminals. Usually, each carrier sending terminal on the branch 1 sends carrier signals through the power line in a broadcast manner, and these carrier signals will be received and processed by the 1# carrier relay forwarding end. The 1# carrier relay forwarding end will automatically repack all the carrier signals received on the branch, and send the carrier signals with complete branch path information to the carrier data receiving master station through the forwarding module. The carrier signals with complete path will be received by the carrier data receiving master station, and finally restored into user complete path information, so as to realize the automatic identification of the power distribution area. Due to the effect of the carrier signal blocking module in the carrier relay forwarding end, the signals received by the 1# carrier relay forwarding end will not be transmitted to the adjacent section, effectively preventing the signals from being transmitted to other branch lines on the power line and causing interference.

[0060] As can be seen from the above, the present embodiment realizes layered and segmented communication by combining power carrier communication and a blocking module, thereby realizing reliable identification of all load users on each power branch line, quickly and efficiently drawing the low-voltage power distribution area topology structure, realizing comprehensive management and control of the user load of the area, and solving the problems of unstable and inaccurate identification in the process of realizing the identification of the power distribution area users. At the same time, the present embodiment can also quickly and accurately identify the power distribution network area online, intelligently perceive the line-house transformer relationship, realize intelligent management of the whole area, make the corresponding relationship between the area and the users clear, improve the economic management level of the area, and is conducive to intuitive and efficient fine management of the whole area by the area management personnel.

[0061] Referring to Figure 2The embodiment of the present application provides a power distribution area identification system based on power carrier communication data, which comprises:

[0062] A carrier sending terminal is used for sending a first power carrier signal.

[0063] A relay forwarding end is used for receiving the first power carrier signal and sending a second power carrier signal, wherein the second power carrier information comprises branch address information of the relay forwarding end, user address information corresponding to the carrier sending end and the first power carrier signal; wherein a wave blocking module is arranged on the relay forwarding end.

[0064] A carrier data receiving main station is used for determining a power distribution area identification result according to the branch address information of the relay forwarding end and the user address information.

[0065] In the embodiment of the present application, the determination of the power distribution area identification result according to the branch address information of the relay forwarding end and the user address information comprises:

[0066] Restoring user complete path information according to the branch address information of the relay forwarding end and the user address information.

[0067] Generating a power distribution area identification result according to the user complete path information.

[0068] The contents of the method embodiments of the present application are applicable to the system embodiments of the present application, the system embodiments of the present application specifically realize the same functions as the above-mentioned method embodiments, and achieve the same beneficial effects as the above-mentioned method.

[0069] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A power distribution feeder identification method based on power line communication data, characterized by, The method comprises the following steps: The carrier sending terminal sends a first power carrier signal to the relay forwarding end; before the relay forwarding end receives the first power carrier signal, the relay forwarding end performs signal amplification processing on the first power carrier signal and coupling voltage transformation processing on the amplified first power carrier signal; wherein the carrier sending terminal comprises a power carrier communication module and a controller, and a 32-bit processor is integrated in the power carrier communication module; the carrier sending terminal sends the first power carrier signal to the relay forwarding end through an OFDM digital modulation and demodulation mode; The relay forwarding end forwards a second power carrier signal to a carrier data receiving main station, wherein the second power carrier signal comprises branch address information of the relay forwarding end, user address information corresponding to the carrier sending end, and the first power carrier signal; after the relay forwarding end receives the first power carrier signal in the second power carrier signal, the relay forwarding end determines branch information to which the first power carrier signal after denoising belongs; the first power carrier signals belonging to the same branch are collected in the same set according to the branch information; the first power carrier signals in the same set are encoded and packaged; a wave blocking module is arranged on the relay forwarding end, and the wave blocking module is used to block the signals of the carrier sending terminal at the relay forwarding end to the carrier data receiving main station, and does not transmit the signals to the carrier sending terminal; The carrier data receiving main station restores complete path information of a user according to the branch address information of the relay forwarding end and the user address information, and generates a power distribution area identification result according to the complete path information of the user.

2. The power carrier communication data based distribution feeder identification method of claim 1, wherein, After the relay forwarding end receives the first power carrier signal, the method further comprises the following steps: Denoising the first power carrier signal.

3. A power distribution feeder identification system based on power line carrier communication data, characterized by, The method comprises the following steps: A carrier sending terminal is used to send a first power carrier signal to a relay forwarding end; Before the relay forwarding end receives the first power carrier signal, the relay forwarding end performs signal amplification processing on the first power carrier signal and coupling voltage transformation processing on the amplified first power carrier signal; wherein the carrier sending terminal comprises a power carrier communication module and a controller, and a 32-bit processor is integrated in the power carrier communication module; the carrier sending terminal sends the first power carrier signal to the relay forwarding end through an OFDM digital modulation and demodulation mode; The relay forwarding end is used for forwarding a second power carrier signal to a carrier data receiving main station, the second power carrier signal comprising branch address information where the relay forwarding end is located, user address information corresponding to the carrier sending end, and the first power carrier signal; wherein, after the relay forwarding end receives the first power carrier signal in the second power carrier signal, it determines branch information to which the first power carrier signal after de-noising belongs; according to the branch information, it collects first power carrier signals belonging to the same branch in the same set; it encodes and packs the first power carrier signals in the same set; the relay forwarding end is provided with a wave blocking module, which is used for blocking the signal of the carrier sending terminal at the relay forwarding end to the carrier data receiving main station, and not transmitting it to the carrier sending terminal; The carrier data receiving main station is used for restoring complete user path information according to the branch address information where the relay forwarding end is located and the user address information, and generating a power distribution area identification result according to the complete user path information.

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