A smart carrier communication device for 10KV~35KV power distribution lines

Abstract

This invention discloses an intelligent carrier communication device for 10KV~35KV power distribution lines, belonging to the field of carrier communication technology. It includes a main communication module A, which contains a TCSK modulation module, a repeater, and an automatic routing module. The main communication module A has four impedance levels, all connected to a line load detection module. These four impedance levels adaptively switch for communication. This invention solves the problem that existing carrier communication devices cannot guarantee communication during electrical faults in the line. The main communication module uses existing power lines as the communication medium, eliminating the need for additional fiber optic or communication cables. For buried cable lines, no manholes need to be excavated; for overhead lines, no ADSS fiber optic cables need to be installed. Impedance detection and level switching can be completed within 50ms, ensuring uninterrupted communication and preventing data packet loss during switching.

Description

Technical Field

[0001] This invention relates to the field of carrier communication technology, specifically to an intelligent carrier communication device for 10KV~35KV power distribution lines. Background Technology

[0002] For existing overhead lines, especially those in remote areas with long power supply radii, dispersed users, and long distances between distribution terminal sites, the location of some existing "two-remote" distribution terminals that operate using the public wireless network is greatly affected by the natural environment and the distribution of operator base stations. For existing ground cable lines, some old distribution cables are directly buried or have been in operation for a long time, resulting in collapses and covered manholes.

[0003] Chinese Patent Publication No. CN203968116U discloses a hybrid line carrier communication device. This device includes: a busbar, a first-level cable line, a second-level cable line, an overhead line, a first snap-fit ​​inductive coupler, a second snap-fit ​​inductive coupler, a master carrier, and a first slave carrier. The two ends of the overhead line are connected to the first-level and second-level cable lines, respectively. The master carrier is connected to the first snap-fit ​​inductive coupler located on the first-level cable line for transmitting a master carrier signal to the first-level cable line via the first snap-fit ​​inductive coupler. The first slave carrier is connected to the second snap-fit ​​inductive coupler located on the second-level cable line for transmitting a slave carrier signal to the second-level cable line via the second snap-fit ​​inductive coupler, enabling high-speed transmission of the carrier signal via a carrier mode to reduce carrier signal attenuation. The hybrid line carrier communication device provided by this patent offers high security and is suitable for use.

[0004] The carrier communication device described in the above patent has poor communication reliability in actual use and cannot guarantee communication when an electrical fault occurs in the line; therefore, it cannot meet the current needs. In response, we propose an intelligent carrier communication device for 10KV~35KV power distribution lines. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent carrier communication device for 10KV~35KV power distribution lines, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent carrier communication device for 10KV~35KV power distribution lines, comprising a main communication module A, wherein the main communication module A is equipped with a TCSK modulation module, and is equipped with technologies such as multi-frequency concurrency, carrier recombination, fast networking, and active noise reduction, and automatically adjusts the transmission frequency according to different transmission environments, has strong anti-interference capabilities, ensures high-speed and stable communication in complex power line environments, and constructs a dedicated channel for power distribution business data transmission; The main communication module A is equipped with a repeater and an automatic routing module. The main communication module A has four impedance levels, and the four impedance levels are connected to the line load detection module. The four impedance levels can be adaptively switched for communication. The main communication module A is connected to the ONU module and DTU module A via power line communication. The DTU module A is electrically connected to the power distribution terminal, and the DTU module A and the power distribution terminal are respectively communicatively connected to capacitor coupler A and capacitor coupler B. It has the characteristics of high transmission rate, long transmission distance, stable and reliable transmission, short delay, simple installation, low cost and easy maintenance.

[0007] Preferably, the operating voltage of the main communication module A is set to DC24 / 48V or AC100V / 220V; The communication interface of the main communication module A includes two RJ45 ports and one 232 serial port. The operating frequency of the main communication module A is set to 200kHz to 2MHz; The data transmission rate of the main communication module A is divided into 8 frequency division channels, which has the function of adaptive communication in high-noise line environment frequency band. The communication protocol standards of the main communication module A include IEEE 802.3, IEEE 802.3u and IEEE 802.3x, and the main communication module A supports IEC 101, IEC 104, MODBUSTCP and MQTT protocols. The maximum communication distance between two communication nodes on an overhead line without any relay equipment is 20km, and the maximum communication distance between two communication nodes on a cable line without any relay equipment is 5km. The main communication module A uses phase-to-ground capacitive coupling and electromagnetic coupling for wireless power transmission and utilizes power line communication, which greatly reduces the number and difficulty of communication network cabling, making the network environment simpler and easier to maintain.

[0008] Preferably, it also includes an automated power distribution master station, which is connected to the substation circuit via optical fiber. The substation is electrically connected to the ONU module via optical fiber. The ONU module is connected to the DTU module A and the communication master module A via network cable. The communication master module A and the DTU module A are electrically connected to each other, providing high bandwidth and low latency transmission for the backbone network.

[0009] Preferably, both the DTU module A and the main communication module A are connected to the ring network cabinet A via optical fiber, and both the ring network cabinet A and the main communication module A are connected to the inductive coupler A via signal lines.

[0010] Preferably, the inductive coupler A is connected to the ring main unit A and the inductive coupler B respectively via a 10kV ground cable shield. The inductive coupler B is connected to the inductive coupler C and the communication main module B respectively via signal lines. The communication main module B is electrically connected to the DTU module B via a network cable. The DTU module B, the inductive coupler B, and the inductive coupler C are all connected to the ring main unit B via wireless transmission.

[0011] Preferably, the inductive coupler C is connected to the inductive coupler D via a 10kV ground cable shield. The inductive coupler D is connected to the inductive coupler E and the main communication module C via signal lines. The main communication module C is electrically connected to the DTU module C via a network cable. The DTU module C, inductive coupler D, and inductive coupler E are all connected to the ring main unit C via wireless transmission.

[0012] Preferably, the inductive coupler E is connected to the inductive coupler F via a 10kV ground cable shield. The inductive coupler F is electrically connected to the main communication module D via a signal line. The main communication module D is electrically connected to the DTU module D via a network cable. The DTU module D and the inductive coupler F are connected to the ring network cabinet D via wireless transmission, covering areas that cannot be reached by optical fiber.

[0013] Preferably, the communication main module A is electrically connected to the power distribution terminal via a network cable. The power distribution terminal is connected to a working power supply A and a working power supply B. The working power supply A is electrically connected to a voltage transformer A, and the working power supply B is electrically connected to a voltage transformer B.

[0014] Preferably, the capacitive coupler A and capacitive coupler B are connected to the two B-phase AC power lines at both ends of the switch cabinet, and the power distribution terminal is also connected to a switch remote control and signaling module, which is connected to the switch cabinet via a wireless transmission module.

[0015] Preferably, the main communication module A uses a 10kV to 35kV cable as the communication transmission medium to form a hybrid network with optical fiber and wireless, and the main communication module A is used to communicate with a private network.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. All communication main modules of the present invention are configured with the same structure. Through the combined effects of TCSK modulation, multi-frequency concurrency, and frequency band adaptation, the communication main modules A, B, C, and D can maintain stable communication even in a 95% strong noise environment. In cable lines with partial discharge intensity of up to 500pC, the communication bit error rate is reduced. Under transient pulse interference generated by switching operation, communication is not interrupted and the data packet loss rate is reduced. Compared with traditional OFDM carriers, which interrupt communication when the signal-to-noise ratio is <5dB, this device can still maintain communication when the SNR is as low as -3dB, improving the anti-interference capability by about 8dB. Furthermore, the communication main modules use existing power lines as the communication medium, eliminating the need to lay additional optical cables or communication cables. For buried cable lines, there is no need to excavate manholes, and for overhead lines, there is no need to lay ADSS optical cables. 2. This invention maintains communication even when an electrical fault occurs on the line through the main communication module. This is a core advantage that traditional carrier technology does not possess. In the scenario of power distribution network relay protection, when a line fault occurs, the protection device needs to reliably receive the trip command. The fault communication maintenance capability of this device ensures that the fault command can be delivered, avoiding protection failure or over-tripping due to communication interruption. When the line switches from no-load to full-load, the impedance change range can reach more than 10 times. Traditional fixed impedance carriers will be interrupted due to mismatch. This device can complete impedance detection and tap switching within 50ms without communication interruption and without data packet loss during the switching process. 3. This invention enables real-time monitoring of the line using communication signals while simultaneously communicating, achieving an integrated working effect of communication and sensing. By detecting open circuits, short circuits, and partial discharges, it combines time-domain reflection and frequency-domain reflection methods. The TDR calculates the fault distance by measuring the time difference between the transmitted and reflected pulses through voltage transformers A and B. The FDR analyzes the phase change of the reflected signal through frequency sweeping, making it more sensitive to weak faults and achieving online real-time monitoring. The location is reported immediately after a fault occurs, shortening the fault search time by more than 80%. Attached Figure Description

[0017] Figure 1 This is a diagram showing the equipment installation topology of the present invention in an urban power distribution network area; Figure 2 This is a diagram showing the equipment installation topology of the present invention on an overhead line.

[0018] In the diagram: 1. Substation; 2. Automated power distribution master station; 3. ONU module; 4. DTU module A; 401. DTU module B; 402. DTU module C; 403. DTU module D; 5. Communication main module A; 501. Communication main module B; 502. Communication main module C; 503. Communication main module D; 6. Ring main unit A; 601. Ring main unit B; 602. Ring main unit C; 603. Ring main unit D; 7. Inductor Coupler A; 701, Inductive Coupler B; 702, Inductive Coupler C; 703, Inductive Coupler D; 704, Inductive Coupler E; 705, Inductive Coupler F; 8, Switchgear; 9, Power Distribution Terminal; 10, Working Power Supply A; 1001, Working Power Supply B; 11, Voltage Transformer A; 1101, Voltage Transformer B; 12, Switch Remote Control and Signaling Module; 13, Capacitive Coupler A; 1301, Capacitive Coupler B. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: In urban power distribution networks, a certain number of underground cable lines exist. Due to external factors, some fiber optic communication lines may be disconnected or damaged, resulting in communication outages at switching stations or ring main units. Using a 10kV power line intelligent communication module, high-speed communication can be quickly established between communication blind spots or sites requiring remote control functionality and the distribution automation master station. It can also be arbitrarily networked with fiber optic communication lines. Please refer to [link to relevant documentation]. Figure 1 This embodiment provides the following technical solution: A smart carrier communication device for 10KV~35KV power distribution lines includes a main communication module A5. The main communication module A5 is equipped with a TCSK modulation module, which, together with technologies such as multi-frequency concurrency, carrier recombination, fast networking, and active noise reduction, automatically adjusts the transmission frequency according to different transmission environments. It has strong anti-interference capabilities, ensures high-speed and stable communication in complex power line environments, and builds a dedicated channel for power distribution business data transmission. The communication main module A5 is equipped with a repeater and an automatic routing module. The communication main module A5 has four impedance levels, and the four impedance levels are connected to the line load detection module. The four impedance levels can be adaptively switched for communication. The automatic routing module is based on an improved version of the dynamic source routing protocol. Each node maintains a routing table, periodically sends HELLO messages to detect neighboring nodes, and dynamically selects the optimal path based on signal-to-noise ratio, bit error rate, and latency. When the output impedance of the communication module does not match the line impedance, reflection loss will occur. When a link is interrupted, the routing module automatically switches to the backup path within milliseconds, realizing network self-healing.

[0021] The main communication module A5 uses power line communication to connect with ONU module 3 and DTU module A4; The operating voltage of the main communication module A5 is set to DC24 / 48V and AC100V / 220V. The communication interfaces of the main communication module A5 include two RJ45 ports and one 232 serial port; The operating frequency of the main communication module A5 is set to 200kHz to 2MHz; The data transmission rate of the main communication module A5 is divided into 8 frequency division channels, which has the function of adaptive communication in high-noise line environments. The communication protocol standards of the main communication module A5 include IEEE 802.3, IEEE 802.3u and IEEE 802.3x, and the main communication module A5 supports IEC101, IEC104, MODBUSTCP and MQTT protocols. The maximum communication distance between two communication nodes on an overhead line without any relay equipment is 20km, and the maximum communication distance between two communication nodes on a cable line without any relay equipment is 5km. The main communication module A5 uses phase-to-ground capacitive coupling and electromagnetic coupling for wireless power transmission, utilizing power line communication to greatly reduce the amount and complexity of communication network cabling, making the network environment simpler and maintenance more convenient. When a line fault occurs, the protection device needs to reliably receive trip commands. The fault communication holding capability of this device ensures that fault commands can be delivered, avoiding protection failure or over-tripping due to communication interruption. When the line switches from no-load to full-load, the impedance change range can reach more than 10 times. Traditional fixed impedance carriers will be interrupted due to mismatch. This device can complete impedance detection and tap switching within 50ms without communication interruption and without data packet loss during the switching process.

[0022] It should be noted that the system also includes an automated power distribution master station 2, which is electrically connected to substation 1 via optical fiber. Substation 1 is electrically connected to ONU module 3 via optical fiber. ONU module 3 is connected to DTU module A4 and communication master module A5 via network cables. Communication master module A5 is electrically connected to DTU module A4. Both DTU module A4 and communication master module A5 are connected to ring main unit A6 via optical fiber. Furthermore, ring main unit A6 and communication master module A5 are inductively coupled via signal lines. Inductive coupler A7 is connected to ring main unit A6 and inductive coupler B701 via a 10kV ground cable shield. Inductive coupler B701 is connected to inductive coupler C702 and communication main module B501 via signal lines. Communication main module B501 is electrically connected to DTU module B401 via a network cable. DTU module B401, inductive coupler B701, and inductive coupler C702 are all connected to ring main unit B601 via wireless transmission. Inductive coupler C702 is connected via a 10kV ground cable shield. Inductive coupler D703 is connected to inductive coupler E704 and communication main module C502 via signal lines. Communication main module C502 is electrically connected to DTU module C402 via network cable. DTU module C402, inductive coupler D703, and inductive coupler E704 are all connected to ring main unit C602 wirelessly. Inductive coupler E704 is connected to inductive coupler F705 via a 10kV ground cable shield. Inductive coupler F705 is connected via signal lines. The main communication module D503 is electrically connected to the main communication module D503 via a network cable. The main communication module D503 is electrically connected to the DTU module D403 via a network cable. The DTU module D403 and the inductive coupler F705 are connected to the ring network cabinet D603 via wireless transmission. Communication can still be maintained when the SNR is as low as -3dB, and the anti-interference capability is improved by about 8dB. Furthermore, the main communication module uses the existing power line as the communication medium, without the need to lay additional optical cables or communication cables. For buried cable lines, there is no need to dig manholes, and for overhead lines, there is no need to lay ADSS optical cables. The characteristics of power lines are used to extend coverage, and the flexibility of wireless technology is used for end-point access, achieving full coverage of power distribution network communication.

[0023] In addition, the main communication module A5 uses 10kV to 35kV cables as the communication transmission medium to form a hybrid network with fiber optics and wireless, and the main communication module A5 is also used for communication with private networks. Example 2: Currently, secondary equipment communication on overhead power lines mainly utilizes 4G communication modules to achieve "remote control" functions. A smart carrier communication device for 10kV~35kV power distribution lines, combined with a wireless and fiber optic hybrid network, and employing a phase-to-ground capacitive coupling connection, can establish a high-speed communication channel on 10kV power lines. This meets the uplink communication needs of FTUs in wireless signal coverage blind spots or requiring remote control functionality, with a communication distance exceeding 50 kilometers. Please refer to [link / reference]. Figure 2 This embodiment provides the following technical solution: This embodiment of an intelligent carrier communication device for 10KV~35KV power distribution lines includes a main communication module A5. The main communication module A5 is equipped with a TCSK modulation module, which, together with technologies such as multi-frequency concurrency, carrier recombination, fast networking, and active noise reduction, automatically adjusts the transmission frequency according to different transmission environments. It has strong anti-interference capabilities, ensures high-speed and stable communication in complex power line environments, and constructs a dedicated channel for power distribution business data transmission. The TCSK modulation module generates highly redundant parity bits from the raw data via a Turbo encoder. The encoded data stream is then mapped to multiple orthogonal frequency points using frequency shift keying. The Turbo encoding employs a parallel structure of two recursive system convolutional code encoders connected by an interleaver, enabling iterative decoding at the decoder end to achieve a coding gain close to the Shannon limit. Soft-decision demodulation is used, inputting the log-likelihood ratio of the received signal into the Turbo iterative decoder. Through 5 to 8 iterations, the maximum a posteriori probability decoding result is approximated, ensuring correct demodulation even under extremely low signal-to-noise ratio conditions.

[0024] The communication main module A5 is equipped with a repeater and an automatic routing module. The communication main module A5 has four impedance levels, and the four impedance levels are connected to the line load detection module. The four impedance levels can be adaptively switched for communication. DTU module A4 is electrically connected to power distribution terminal 9. DTU module A4 and power distribution terminal 9 are communicatively connected to capacitive coupler A13 and capacitive coupler B1301, respectively. It features high transmission rate, long transmission distance, stable and reliable transmission, short latency, simple installation, low cost, and easy maintenance.

[0025] The operating voltage of the main communication module A5 is set to DC24 / 48V and AC100V / 220V. The communication interfaces of the main communication module A5 include two RJ45 ports and one 232 serial port; The operating frequency of the main communication module A5 is set to 200kHz to 2MHz; The data transmission rate of the main communication module A5 is divided into 8 frequency division channels, which has the function of adaptive communication in high-noise line environments. The communication protocol standards of the main communication module A5 include IEEE 802.3, IEEE 802.3u and IEEE 802.3x, and the main communication module A5 supports IEC101, IEC104, MODBUSTCP and MQTT protocols. The maximum communication distance between two communication nodes on an overhead line without any relay equipment is 20km, and the maximum communication distance between two communication nodes on a cable line without any relay equipment is 5km. The main communication module A5 uses phase-to-ground capacitive coupling and electromagnetic coupling for wireless power transmission and utilizes power line communication, which greatly reduces the number and difficulty of communication network cabling, making the network environment simpler and easier to maintain.

[0026] It should be noted that the main communication module A5 is electrically connected to the power distribution terminal 9 via a network cable. The power distribution terminal 9 is connected to the working power supply A10 and the working power supply B1001 respectively. The working power supply A10 is electrically connected to the voltage transformer A11, and the working power supply B1001 is electrically connected to the voltage transformer B1101. Capacitor couplers A13 and B1301 are connected to the two B-phase AC lines of the switch cabinet 8. The power distribution terminal 9 is also connected to the switch remote control and signaling module 12. The switch remote control and signaling module 12 is connected to the switch cabinet 8 via a wireless transmission module. The high-frequency signal of the main communication module A5 is injected between a phase conductor and the ground through the capacitor couplers A13 and B1301. The coupler is composed of a high-voltage ceramic capacitor and a surge arrester. The power frequency current is blocked by the capacitor, and the high-frequency signal passes smoothly. The equivalent circuit is a high-pass filter with a cutoff frequency designed below 50kHz to ensure effective transmission of signals above 200kHz. Voltage transformers A11 and B1101 are mounted on the cable body and the signal is coupled through the principle of electromagnetic induction. The magnetic core of the transformer is made of high-frequency ferrite material and the operating frequency covers 200kHz to 2MHz. The primary and secondary turns ratio is designed to optimize the signal injection efficiency.

[0027] Furthermore, the main communication module A5 uses 10kV to 35kV cables as the communication transmission medium to form a hybrid network with optical fiber and wireless, and the main communication module A5 is used to communicate with private networks.

[0028] Working principle: The main communication module A5 is connected to the B-phase AC lines at both ends of switchgear 8 through capacitive couplers A13 and B1301 respectively. High-frequency communication signals are injected into the 10kV power line using phase-to-ground coupling. The high-frequency signals are transmitted along the power line. Capacitive couplers or inductive couplers at each node along the line extract the signals from the power line and send them to the corresponding main communication modules B501, C502, and D503. The communication modules transmit the demodulated data to the corresponding DTU modules A4, B401, C402, and D403 through network cables or serial ports. The DTU modules then interact with the distribution terminal 9 to complete the bidirectional transmission of telemetry, remote signaling, and remote control data.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A smart carrier communication device for 10KV~35KV power distribution lines, comprising a main communication module A (5), characterized in that, The main communication module A (5) is equipped with a TCSK modulation module; The main communication module A (5) is equipped with a repeater and an automatic routing module. The main communication module A (5) has four impedance levels, and the four impedance levels are connected to the line load detection module. The four impedance levels are adaptively switched for communication. The main communication module A (5) is connected to the ONU module (3) and the DTU module A (4) via power line communication; The DTU module A (4) is electrically connected to the power distribution terminal (9), and the DTU module A (4) and the power distribution terminal (9) are respectively connected to the capacitor coupler A (13) and the capacitor coupler B (1301).

2. The intelligent carrier communication device for 10KV~35KV power distribution lines according to claim 1, characterized in that, The operating voltage of the main communication module A (5) is set to DC24 / 48V, AC100V / 220V; The communication interface of the main communication module A (5) includes two RJ45 ports and one 232 serial port; The operating frequency of the main communication module A (5) is set to 200kHz to 2MHz; The data transmission rate of the main communication module A (5) is divided into 8 frequency division channels; The communication protocol standards of the main communication module A (5) include IEEE 802.3, IEEE 802.3u and IEEE 802.3x, and the main communication module A (5) supports IEC 101, IEC 104, MODBUSTCP and MQTT protocols; The main communication module A (5) uses phase-to-ground capacitive coupling and electromagnetic coupling to transmit wireless power.

3. The intelligent carrier communication device for 10KV~35KV power distribution lines according to claim 2, characterized in that, It also includes an automated power distribution master station (2), which is connected to the substation (1) via optical fiber. The substation (1) is electrically connected to the ONU module (3) via optical fiber. The ONU module (3) is connected to the DTU module A (4) and the communication master module A (5) via network cable. The communication master module A (5) and the DTU module A (4) are electrically connected.

4. The intelligent carrier communication device for 10KV~35KV power distribution lines according to claim 3, characterized in that, The DTU module A (4) and the main communication module A (5) are both connected to the ring network cabinet A (6) and are connected to the ring network cabinet A (6) via optical fiber. The ring network cabinet A (6) and the main communication module A (5) are both connected to the inductive coupler A (7) via signal lines.

5. The intelligent carrier communication device for 10KV~35KV power distribution lines according to claim 4, characterized in that, The inductive coupler A (7) is connected to the ring main unit A (6) and the inductive coupler B (701) respectively through a 10kV ground cable shield. The inductive coupler B (701) is connected to the inductive coupler C (702) and the communication main module B (501) respectively through a signal line. The communication main module B (501) is electrically connected to the DTU module B (401) through a network cable. The DTU module B (401), the inductive coupler B (701) and the inductive coupler C (702) are all connected to the ring main unit B (601) through wireless transmission.

6. The intelligent carrier communication device for 10KV~35KV power distribution lines according to claim 5, characterized in that, The inductive coupler C (702) is connected to the inductive coupler D (703) through a 10kV ground cable shield. The inductive coupler D (703) is connected to the inductive coupler E (704) and the communication main module C (502) through signal lines. The communication main module C (502) is electrically connected to the DTU module C (402) through a network cable. The DTU module C (402), the inductive coupler D (703), and the inductive coupler E (704) are all connected to the ring network cabinet C (602) wirelessly.

7. The intelligent carrier communication device for 10KV~35KV power distribution lines according to claim 6, characterized in that, The inductive coupler E (704) is connected to the inductive coupler F (705) through a 10kV ground cable shield. The inductive coupler F (705) is electrically connected to the communication main module D (503) through a signal line. The communication main module D (503) is electrically connected to the DTU module D (403) through a network cable. The DTU module D (403) and the inductive coupler F (705) are connected to the ring network cabinet D (603) through wireless transmission.

8. The intelligent carrier communication device for 10KV~35KV power distribution lines according to claim 1, characterized in that, The main communication module A (5) is electrically connected to the power distribution terminal (9) via a network cable. The power distribution terminal (9) is connected to a working power supply A (10) and a working power supply B (1001). The working power supply A (10) is electrically connected to a voltage transformer A (11), and the working power supply B (1001) is electrically connected to a voltage transformer B (1101).

9. The intelligent carrier communication device for 10KV~35KV power distribution lines according to claim 8, characterized in that, The capacitor coupler A (13) and capacitor coupler B (1301) are connected to the two ends of the B-phase AC power line of the switch cabinet (8). The power distribution terminal (9) is also connected to the switch remote control and signaling module (12). The switch remote control and signaling module (12) is connected to the switch cabinet (8) through a wireless transmission module.

10. The intelligent carrier communication device for a 10KV~35KV power distribution line according to claim 8, characterized in that, The main communication module A (5) uses a 10kV to 35kV cable as the communication transmission medium to form a hybrid network with optical fiber and wireless, and the main communication module A (5) is used to communicate with the private network.

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