Repeater based on medium voltage cable carrier communication

Abstract

The application discloses a kind of relays based on medium voltage cable carrier communication, it is related to power communication technical field, the relay includes the signal receiving module, signal processing module and signal sending module connected in turn, wherein: the input of the signal receiving module is connected with the output of previous medium voltage cable, the output of the signal sending module is connected with the input of subsequent medium voltage cable, the signal processing module is used for the carrier signal of the signal receiving module output is demodulated, shaping, amplification and modulation in turn, the application realizes long distance communication demand under medium voltage cable high quality reliable carrier communication, solves the problem of poor carrier communication quality of medium voltage cable under long distance communication demand.

Description

Technical Field

[0001] This application relates to the field of power communication technology, and in particular to a repeater based on medium-voltage cable carrier communication. Background Technology

[0002] With the rapid development of smart grids, power communication plays a crucial role in the reliable operation and intelligent management of power grids. Medium-voltage cable carrier communication, which directly utilizes existing power lines (medium-voltage cables) as the transmission medium, eliminates the need for additional communication lines, offering advantages such as low cost, ease of deployment, and wide coverage, and has been widely used in power systems.

[0003] However, in practical applications, medium-voltage cable carrier communication technology is mainly suitable for short-distance communication needs in power distribution networks. For long-distance communication, due to the long length of medium-voltage cables (e.g., several kilometers or even tens of kilometers) and complex line structures, the carrier signal will attenuate, distort, and experience noise superposition during transmission due to factors such as cable loss, impedance mismatch, and electromagnetic interference. This leads to a decrease in carrier signal quality, resulting in poor medium-voltage cable carrier communication quality. Summary of the Invention

[0004] The purpose of this application is to provide a repeater based on medium-voltage cable carrier communication to solve the problem of poor carrier communication quality of medium-voltage cables under long-distance communication requirements.

[0005] To achieve the above objectives, this application provides the following solution:

[0006] In a first aspect, this application provides a repeater based on medium-voltage cable carrier communication, wherein the repeater includes a signal receiving module, a signal processing module, and a signal transmitting module connected in sequence, wherein:

[0007] The input terminal of the signal receiving module is connected to the output terminal of the preceding medium-voltage cable, and the output terminal of the signal transmitting module is connected to the input terminal of the following medium-voltage cable. The signal processing module is used to demodulate, shape, amplify, and modulate the carrier signal output by the signal receiving module in sequence.

[0008] Optionally, the signal processing module includes a baseband modulation and demodulation module and a shaping circuit and an amplification circuit connected in sequence, wherein:

[0009] The first input terminal of the baseband modulation and demodulation module is connected to the output terminal of the signal receiving module, and the first output terminal of the baseband modulation and demodulation module is connected to the input terminal of the shaping circuit.

[0010] The output terminal of the amplifier circuit is connected to the second input terminal of the baseband modulation and demodulation module, and the second output terminal of the baseband modulation and demodulation module is connected to the input terminal of the signal transmission module.

[0011] Optionally, the signal processing module includes an analog-to-digital converter module, a digital signal processor, and a digital-to-analog converter module connected in sequence, wherein:

[0012] The input terminal of the analog-to-digital converter module is connected to the output terminal of the signal receiving module, and the output terminal of the digital-to-analog converter module is connected to the input terminal of the signal transmitting module.

[0013] Optionally, the signal receiving module includes a first signal coupling circuit, the input terminal of the first signal coupling circuit is connected to the output terminal of the signal receiving module, and the output terminal of the first signal coupling circuit is the input terminal of the signal processing module.

[0014] Optionally, the signal receiving module further includes a filtering circuit, wherein the input terminal of the first signal coupling circuit is connected to the output terminal of the preceding medium-voltage cable, the output terminal of the first signal coupling circuit is connected to the input terminal of the filtering circuit, and the output terminal of the filtering circuit is connected to the input terminal of the signal processing module.

[0015] Optionally, the signal transmitting module includes a second signal coupling circuit, the input terminal of which is connected to the output terminal of the signal processing module, and the output terminal of which is connected to the input terminal of the subsequent medium-voltage cable.

[0016] Optionally, the signal transmitting module further includes a power amplifier, the input of which is connected to the output of the signal processing module, and the output of which is connected to the input of the second signal coupling circuit.

[0017] Optionally, the repeater based on medium-voltage cable carrier communication further includes a power management module, the output of which is connected to the power supply of the signal receiving module, the signal processing module, and the signal transmitting module.

[0018] Optionally, the power management module includes an external power supply, a power management controller module, and a power conversion circuit connected in sequence, wherein:

[0019] The power management controller module is connected to the signal receiving module, the input terminal of the power conversion circuit is connected to the external power supply and the power management controller module, and the output terminal of the power conversion circuit is connected to the power supply terminals of the signal receiving module, the signal processing module, and the signal transmitting module.

[0020] Optionally, the repeater based on medium-voltage cable carrier communication further includes a housing, on which a first interface component and a second interface component are provided;

[0021] The signal receiving module, signal processing module, signal transmitting module, and power management module are all housed within the housing;

[0022] The signal receiving module is connected to the preceding section of medium-voltage cable through the first interface component, and the signal transmitting module is connected to the following section of medium-voltage cable through the second interface component.

[0023] According to the specific embodiments provided in this application, the following technical effects are disclosed:

[0024] This application provides a repeater for medium-voltage cable carrier communication. After demodulating the carrier signal output from the signal receiving module to obtain the baseband signal, the signal processing module shapes the baseband signal to restore it to an ideal waveform, eliminating noise and distortion introduced during transmission and initially improving the quality of the carrier signal transmitted to subsequent medium-voltage cables. By amplifying the shaped baseband signal, the carrier signal strength is enhanced, the signal-to-noise ratio is improved, and signal attenuation during transmission is eliminated, allowing the carrier signal to travel over longer distances without information loss, further improving the quality of the carrier signal transmitted to subsequent medium-voltage cables. By remodulating the amplified baseband signal onto the carrier and transmitting the remodulated carrier signal to the next segment of the medium-voltage cable through the signal transmitting module, carrier signal relay is achieved, extending the transmission distance of the carrier signal. This enables high-quality and reliable carrier communication over medium-voltage cables under long-distance communication requirements, solving the problem of poor carrier communication quality over medium-voltage cables in long-distance communication scenarios. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural block diagram of a repeater based on medium-voltage cable carrier communication in one embodiment of this application;

[0027] Figure 2 Provided for an embodiment of this application Figure 1 Block diagram of the signal processing module;

[0028] Figure 3 Provided for another embodiment of this application Figure 1Block diagram of the signal processing module;

[0029] Figure 4 Provided for an embodiment of this application Figure 1 Block diagram of the power management module;

[0030] Figure 5 Provided for an embodiment of this application Figure 4 Circuit diagram of the medium power conversion circuit;

[0031] Figure 6 Provided for an embodiment of this application Figure 4 Circuit schematic of the power management controller.

[0032] In the diagram, 1. Signal receiving module, 2. Signal processing module, 3. Signal transmitting module, 4. Baseband modulation and demodulation module, 5. Shaping circuit, 6. Amplification circuit, 7. Analog-to-digital conversion module, 8. Digital signal processor, 9. Digital-to-analog conversion module, 10. First signal coupling circuit, 11. Filtering circuit, 12. Second signal coupling circuit, 13. Power amplifier, 14. Power management module, 15. External power supply, 16. Power management controller module, 17. Power conversion circuit, 18. First conversion circuit, 19. Second conversion circuit. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] In one exemplary embodiment, such as Figure 1 As shown, a repeater based on medium-voltage cable carrier communication is provided, comprising a signal receiving module 1, a signal processing module 2, and a signal transmitting module 3 connected in sequence, wherein:

[0036] The input terminal of the signal receiving module 1 is connected to the output terminal of the preceding medium-voltage cable, the output terminal of the signal transmitting module 3 is connected to the input terminal of the following medium-voltage cable, and the signal processing module 2 is used to demodulate, shape, amplify and modulate the carrier signal output by the signal receiving module 1 in sequence.

[0037] In this embodiment, the medium-voltage cable refers to a three-phase medium-voltage cable. After the baseband signal is obtained by demodulating the carrier signal output from the signal receiving module 1 via the signal processing module 2, the baseband signal is shaped to restore it to an ideal waveform, eliminating noise and distortion introduced during transmission and initially improving the quality of the carrier signal transmitted to subsequent medium-voltage cables. By amplifying the shaped baseband signal, the carrier signal strength is enhanced, the signal-to-noise ratio of the carrier signal is improved, signal attenuation during transmission is eliminated, and the carrier signal is allowed to transmit over longer distances without information loss, further improving the quality of the carrier signal transmitted to subsequent medium-voltage cables. By remodulating the amplified baseband signal onto the carrier and sending the remodulated carrier signal to the next segment of the medium-voltage cable via the signal transmitting module 3, carrier signal relay is achieved, extending the transmission distance of the carrier signal and realizing high-quality and reliable carrier communication for medium-voltage cables under long-distance communication requirements. This solves the problem of poor carrier communication quality for medium-voltage cables under long-distance communication requirements.

[0038] In another exemplary embodiment of this application, such as Figure 2 As shown, the signal processing module 2 includes a baseband modulation and demodulation module 4, and a shaping circuit 5 and an amplifier circuit 6 connected in sequence. Wherein:

[0039] The first input terminal of the baseband modulation and demodulation module 4 is connected to the output terminal of the signal receiving module 1, the first output terminal of the baseband modulation and demodulation module 4 is connected to the input terminal of the shaping circuit 5, the output terminal of the amplifier circuit 6 is connected to the second input terminal of the baseband modulation and demodulation module 4, and the second output terminal of the baseband modulation and demodulation module 4 is connected to the input terminal of the signal transmitting module 3.

[0040] In this embodiment, the signal receiving module 1 receives the carrier signal output from the preceding medium-voltage cable to obtain a first carrier signal. The baseband modulation and demodulation module 4 demodulates the first carrier signal input from the first input terminal, extracts the baseband signal from the first carrier signal, obtains a first baseband signal, and sends the first baseband signal to the shaping circuit 5 through its first output terminal. The shaping circuit 5 shapes the input first baseband signal to restore it to an ideal waveform (such as a standard rectangular pulse), outputs a second baseband signal, and sends it to the amplification circuit 6. The amplification circuit 6 amplifies the second baseband signal, outputs a third baseband signal, and sends it to the second input terminal of the baseband modulation and demodulation module 4. The baseband modulation and demodulation module 4 modulates the third baseband signal input from the second input terminal to obtain a second carrier signal, and sends the second carrier signal to the signal transmitting module 3 through its second output terminal. The signal transmitting module 3 sends the second carrier signal to the following medium-voltage cable. The structure and model of the baseband modulation and demodulation module 4 are not specifically limited here; they can be set according to actual needs. For example, the baseband modem module 4 uses a power line communication (PLC) baseband modem MAX2992. The amplifier circuit 6 can be an amplifier.

[0041] The circuit structure of the shaping circuit 5 is not specifically limited and can be selected according to actual needs, as long as it can restore the baseband signal to the ideal waveform.

[0042] During transmission, carrier signals experience attenuation, distortion, and noise superposition due to factors such as cable loss, impedance mismatch, and electromagnetic interference, leading to a decline in signal quality. If transmission continues solely by amplifying the original carrier signal, noise and distortion will also be amplified synchronously, potentially resulting in complete signal distortion that cannot be correctly recognized by the receiving terminal. In this embodiment, the baseband modulation and demodulation module 4 demodulates the first carrier signal output from the signal receiving module 1 to obtain the first baseband signal. The shaping circuit 5 then shapes the first baseband signal to restore it to its ideal waveform, eliminating noise, distortion, and aberration introduced during transmission, thus initially improving the quality of the carrier signal transmitted to the subsequent medium-voltage cable. The amplification circuit 6 amplifies the second baseband signal output from the shaping circuit 5, enhancing the carrier signal strength and improving the signal-to-noise ratio. This eliminates signal attenuation during transmission while allowing the carrier signal to travel further without information loss, further improving the quality of the carrier signal transmitted to the subsequent medium-voltage cable. The baseband modulation and demodulation module 4 remodulates the third baseband signal output from the amplifier circuit 6 onto the carrier wave, and the signal transmission module 3 sends the second carrier signal output from the baseband modulation and demodulation module 4 to the next section of the medium-voltage cable to continue carrier signal transmission, thereby realizing high-quality and reliable carrier communication of medium-voltage cables under long-distance communication requirements and solving the problem of poor carrier communication quality of medium-voltage cables under long-distance communication requirements.

[0043] The power system environment where medium-voltage cables are located is subject to extremely strong electromagnetic interference (such as pulse interference from motor starting and stopping, switch operations, and harmonic interference). This electromagnetic interference is superimposed on the carrier signal as noise. If the repeater does not demodulate and directly amplifies and transmits the noisy carrier signal, the noise will be amplified synchronously, potentially drowning out the valid signal. By demodulating first, the carrier signal can be restored to the baseband signal, at which point the effects of noise and interference are partially removed (especially after processing such as filtering). For example, the "0" and "1" of the digital baseband signal can be restored to a clear rectangular wave through a shaping circuit, completely eliminating waveform blurring caused by attenuation and interference during transmission. This signal processing effectively isolates interference in intermediate transmission segments, preventing interference from accumulating throughout the transmission link and fundamentally solving the problem of carrier signal degradation in long-distance transmission.

[0044] In addition, medium-voltage cable communication networks typically contain multiple nodes (such as substations, switchgear, and terminal equipment), and different nodes may use different communication protocols or modulation methods (such as ASK, FSK, PSK, etc.). Repeaters, as intermediate nodes, need to demodulate the received carrier signals, extract the common baseband signal, and then remodulate it according to the protocol or modulation method of the next link segment, thus achieving protocol conversion and signal adaptation between different nodes.

[0045] In another exemplary embodiment of this application, the shaping circuit 5 described above includes a filter.

[0046] In this embodiment, the selection of the filter is not specifically limited; it can be selected according to actual needs, as long as it can restore the baseband signal to the ideal waveform. For example, a low-pass filter can be used as the shaping circuit 5. For example, a high-pass filter can be used as the shaping circuit 5. For another example, a comparator can be used as the shaping circuit 5. For yet another example, a limiter or a damper can be used as the shaping circuit 5.

[0047] In another exemplary embodiment of this application, such as Figure 3 As shown, the signal processing module 2 includes an analog-to-digital converter module 7, a digital signal processor (DSP) 8, and a digital-to-analog converter module 9 connected in sequence. Wherein:

[0048] The input terminal of the analog-to-digital converter module 7 is connected to the output terminal of the signal receiving module 1, and the output terminal of the digital-to-analog converter module 9 is connected to the input terminal of the signal transmitting module 3.

[0049] In this embodiment, an analog-to-digital converter (ADC) 7 converts the carrier signal output from the signal receiving module 1 into a digital signal and sends it to the digital signal processor (DSP) 8. The DSP 8 demodulates, shapes, amplifies, corrects errors, and modulates the input digital signal. An analog-to-digital converter (ADC) 9 converts the digital signal output from the DSP 8 after demodulation, shaping, amplification, error correction, and modulation into an analog signal and sends it to the signal transmitting module 3.

[0050] Based on the user manual of the selected low-power digital signal processor 8, build its clock circuit, reset circuit, power supply circuit, and memory expansion circuit.

[0051] In another exemplary embodiment of this application, the digital signal processor 8 employs a low-power digital signal processor.

[0052] In another exemplary embodiment of this application, the signal receiving module 1 includes a first signal coupling circuit 10, the input terminal of the first signal coupling circuit 10 is connected to the output terminal of the preceding medium-voltage cable, and the output terminal of the first signal coupling circuit 10 is connected to the input terminal of the signal processing module 2.

[0053] In this embodiment, the output of the first filter circuit 10 is connected to the input of the baseband modulation and demodulation module 4 or the input of the analog-to-digital conversion module. The first signal coupling circuit 10 is used to acquire the carrier signal output from the preceding medium-voltage cable.

[0054] In another exemplary embodiment of this application, the first signal coupling circuit 10 includes a first coupling transformer, the primary coil of which is connected to the output end of the preceding medium-voltage cable, and the secondary coil of which is connected to the input end of the signal processing module 2.

[0055] In another exemplary embodiment of this application, the first signal coupling circuit 10 includes a first coupling capacitor, the first end of which is connected to the output end of the preceding medium-voltage cable, and the second end of which is connected to the input end of the signal processing module 2.

[0056] In another exemplary embodiment of this application, the first signal coupling circuit 10 includes a first coupling inductor, the first end of which is connected to the output end of the preceding medium-voltage cable, and the second end of which is connected to the input end of the signal processing module 2.

[0057] In another exemplary embodiment of this application, the signal receiving module 1 further includes a filtering circuit 11, the input terminal of the first signal coupling circuit 10 is connected to the output terminal of the preceding medium-voltage cable, the output terminal of the first signal coupling circuit 10 is connected to the input terminal of the filtering circuit 11, and the output terminal of the filtering circuit 11 is connected to the input terminal of the signal processing module 2.

[0058] In this embodiment, the input terminal of the first signal coupling circuit 10 includes the primary coil of the first coupling transformer, the first end of the first coupling capacitor or the first end of the first coupling inductor, and the output terminal of the first signal coupling circuit 10 includes the secondary coil of the first coupling transformer, the second end of the first coupling capacitor or the second end of the first coupling inductor.

[0059] The filtering process of filter circuit 11 can shape the spectrum of the carrier signal to better meet the requirements of subsequent demodulation for the signal spectrum characteristics, ensuring that the demodulation process can accurately restore the original information. For example, a bandpass filter allows signals in the frequency band where the carrier signal is located to pass smoothly while suppressing signals in other frequency bands, making the amplitude and phase characteristics of the carrier signal more stable.

[0060] Demodulation is the process of recovering the original information carried in a carrier signal, and it requires high-quality input signals. If the carrier signal contains a lot of interference and noise, direct demodulation will reduce the signal-to-noise ratio and increase the bit error rate of the original signal output by the demodulator. For example, in ASK (Amplitude Shift Keying) demodulation, interference signals may cause deviations in the amplitude judgment of the signal, leading to the demodulation of incorrect digital information. However, after filtering, the carrier signal has significantly reduced interference and noise, effectively improving the accuracy and reliability of demodulation.

[0061] Once demodulation is complete, the baseband signal is extracted from the carrier wave. If the carrier signal is not filtered before demodulation, it becomes difficult to remove interference and noise mixed in with the baseband signal. Filtering before demodulation, even if it cannot completely remove all interference, minimizes its impact before demodulation, providing a better foundation for further processing of the demodulated signal (such as shaping and amplification), making subsequent processing simpler and more efficient. Without filtering, the interference signal enters the subsequent processing stage along with the original signal, increasing the design complexity of amplifier circuit 6 (requiring a larger dynamic range to handle interference signals).

[0062] From an overall reliability perspective, the order of filtering before demodulation better ensures the accuracy of signal processing and reduces system failures and malfunctions caused by signal processing errors. For example, in medium-voltage cable carrier communication in power systems, accurate signal processing is crucial for functions such as power dispatching and equipment monitoring; filtering before demodulation helps improve the reliability and stability of the entire communication system.

[0063] In another exemplary embodiment of this application, the first signal coupling circuit 10 includes a first LC resonant circuit, the input terminal of the first LC resonant circuit is connected to the output terminal of the preceding medium-voltage cable, and the output terminal of the first LC resonant circuit is connected to the input terminal of the signal processing module 2.

[0064] In another exemplary embodiment of this application, the signal transmitting module 3 includes a second signal coupling circuit 12, the input terminal of the second signal coupling circuit 12 is connected to the output terminal of the signal processing module 2, and the output terminal of the second signal coupling circuit 12 is connected to the input terminal of the subsequent medium voltage cable.

[0065] In this embodiment, the second signal coupling circuit 12 is used to acquire the carrier signal output by the signal processing module 2. The output terminal of the signal processing module 2 includes the output terminal of the amplifier circuit 6 or the output terminal of the digital-to-analog converter module 9.

[0066] In another exemplary embodiment of this application, the signal transmitting module 3 further includes a power amplifier 13, the input terminal of which is connected to the output terminal of the signal processing module 2, and the output terminal of the power amplifier 13 is connected to the input terminal of the second signal coupling circuit 12.

[0067] In this embodiment, the carrier signal output by the signal processing module 2 is amplified, impedance matched, and filtered by the power amplifier 13, thereby further improving the quality of the carrier signal input to the next section of medium-voltage cable.

[0068] In another exemplary embodiment of this application, the second signal coupling circuit 12 described above includes a second coupling transformer. The primary coil of the second coupling transformer is connected to the output terminal of the signal processing module 2 or the output terminal of the Class D power amplifier 13, and the secondary coil of the second coupling transformer is connected to the input terminal of the subsequent medium-voltage cable.

[0069] In this embodiment, the carrier signal output by the signal processing module 2 is obtained through the second coupling transformer and sent to the input end of the next section of medium voltage cable, while isolation protection is achieved.

[0070] In another exemplary embodiment of this application, the second signal coupling circuit 12 includes a second coupling capacitor, the first end of which is connected to the output terminal of the signal processing module 2, and the second end of which is connected to the input terminal of the subsequent medium-voltage cable.

[0071] In another exemplary embodiment of this application, the second signal coupling circuit 12 includes a second coupling inductor, the first end of which is connected to the output end of the signal processing module 2, and the second end of which is connected to the input end of the subsequent medium-voltage cable.

[0072] In another exemplary embodiment of this application, the second signal coupling circuit 12 includes a second LC resonant circuit, the input terminal of the second LC resonant circuit is connected to the output terminal of the signal processing module 2, and the output terminal of the second LC resonant circuit is connected to the input terminal of the subsequent medium-voltage cable.

[0073] In another exemplary embodiment of this application, the power amplifier 13 described above is a Class D power amplifier.

[0074] In this embodiment, using a Class D power amplifier has the following advantages:

[0075] 1. To compensate for insufficient power in the signal processing module and meet the transmission loss requirements of medium-voltage cables;

[0076] 2. Utilizing high efficiency characteristics to meet the long-term stable operation requirements of medium-voltage systems;

[0077] 3. Achieve impedance matching to reduce signal reflection and transmission efficiency loss;

[0078] 4. Enhances signal anti-interference capability and adapts to strong noise background in medium-voltage environments;

[0079] 5. Ensure signal fidelity and meet the modulation characteristics requirements of carrier communication.

[0080] The high efficiency, high power output, low distortion, easy matching, and high reliability of Class D power amplifiers perfectly meet the following core requirements for medium-voltage cable transmission:

[0081] 1. Long-term operation: No active cooling required, suitable for harsh environments;

[0082] 2. Interference immunity: High-power signal and low-EMI design adapts to high-noise environments;

[0083] 3. Signal fidelity: Modern modulation techniques ensure accurate reproduction of the carrier signal;

[0084] 4. Economic efficiency: Integrated design reduces costs and maintenance complexity.

[0085] In another exemplary embodiment of this application, the repeater based on medium-voltage cable carrier communication described above further includes a power management module 14. The output terminal of the power management module 14 is connected to the power supply terminal of the signal receiving module 1, the signal processing module 2, and the signal transmitting module 3, providing operating voltage for the signal receiving module 1, the signal processing module 2, and the signal transmitting module 3.

[0086] In another exemplary embodiment of this application, such as Figure 4 As shown, the power management module 14 includes an external power supply 15, a power management controller module 16, and a power conversion circuit 17, wherein:

[0087] The power management controller module 16 is connected to the signal receiving module 1. The input terminal of the power conversion circuit 17 is connected to the external power supply 15 and the power management controller module 16. The output terminal of the power conversion circuit 17 is connected to the power supply terminals of the signal receiving module 1, the signal processing module 2, and the signal transmitting module 3.

[0088] In this embodiment, after receiving a signal from the signal receiving module 1 indicating the need to transmit carrier data, the power management controller module 16 enables the power conversion circuit 17. The power conversion circuit 17 converts the output voltage of the external power supply 15 into the operating voltage of the signal receiving module 1, signal processing module 2, and signal transmitting module 3, enabling them to operate normally. When the power management controller module 16 receives a signal from the signal receiving module 1 indicating that carrier data transmission is not required, it controls the power conversion circuit 17 to operate in a low-power mode. This allows the signal receiving module 1 to only monitor whether carrier data transmission is needed, and puts the signal processing module 2 and signal transmitting module 3 into a sleep state to reduce power consumption. When carrier data transmission is needed, the power management controller module 16 controls the power conversion circuit 17 to operate normally again, waking up the signal receiving module 1, signal processing module 2, and signal transmitting module 3, enabling them to operate normally and transmit carrier data.

[0089] The specific model of the power management controller module 16 is not limited; it can be selected according to actual needs. The key is to enable the power conversion circuit 17 upon receiving a signal from the signal receiving module 1 indicating that carrier data transmission is required, and to control the power conversion circuit 17 to operate in low-power mode upon receiving a signal from the signal receiving module 1 indicating that carrier data transmission is not required. After the signal receiving module 1 enters sleep mode, it only monitors whether carrier data transmission is needed to reduce power consumption.

[0090] In another exemplary embodiment of this application, the external power source 15 is a disposable lithium battery.

[0091] In another exemplary embodiment of this application, such as Figure 5 As shown, the power conversion circuit 17 described above includes a first conversion circuit 18 and a second conversion circuit 19, wherein:

[0092] The first conversion circuit 18 is used to convert the output voltage of the external power supply 15 into the operating voltage of the signal receiving module 1 and the signal transmitting module 3;

[0093] The second conversion circuit 19 is used to convert the output voltage of the external power supply 15 into the operating voltage of the signal processing module 2.

[0094] In another exemplary embodiment of this application, when the operating voltage of the signal receiving module 1 and the signal transmitting module 3 is higher than the output voltage of the external power supply 15, the first conversion circuit 18 described above adopts a boost circuit.

[0095] In another exemplary embodiment of this application, the first conversion circuit 18 described above employs a Boost converter circuit.

[0096] In another exemplary embodiment of this application, the above-described Boost circuit includes a boost chip, wherein:

[0097] The enable terminal (EN) of the boost chip is connected to the power management controller module 16, the input terminal of the boost chip is connected to the output voltage of the external power supply 15, and the output terminal of the boost chip is connected to the power supply terminals of the signal receiving module 1 and the signal transmitting module 3.

[0098] In this embodiment, the power management controller module 16 uses the serial port signal sent by the signal receiving module 1 to determine whether there is carrier data to be transmitted. If there is carrier data to be transmitted, it sends an enable signal to the boost chip. After the boost chip is enabled, it increases the output voltage (Vin, such as 3.6V battery voltage) of the external power supply 15 to the working voltage (such as 9V) of the signal receiving module 1 and the signal transmitting module 3.

[0099] When there is no carrier data to be transmitted, the power management controller module 16 controls the power conversion circuit 17 to operate in a low-power mode, and the signal receiving module 1, signal processing module 2 and signal transmitting module 3 enter a low-power mode.

[0100] In another exemplary embodiment of this application, the boost chip described above is an MP3432 boost chip.

[0101] In this embodiment, the peripheral circuit of the MP3432 boost chip is as follows: Figure 5 As shown.

[0102] In another exemplary embodiment of this application, such as Figure 5 As shown, the second conversion circuit 19 includes a switching transistor Q1 and a filter inductor L4. The source of the switching transistor Q1 is connected to the output voltage (Vin) of the external power supply 15. The gate of the switching transistor Q1 is connected to the power management controller module 16 via resistor R23. The gate of the switching transistor Q1 is connected to the source via resistor R22. The drain of the switching transistor Q1 is connected to the first terminal of the filter inductor L4. The second terminal of the filter inductor L4 is connected to the power supply terminal AVCC of the signal processing module 2 on one hand, and to the first terminal of the filter capacitor C40 on the other hand. The second terminal of the filter capacitor C40 is grounded.

[0103] In this embodiment, if carrier data needs to be transmitted, the boost chip immediately sets the gate of Q1 to a low level, then Q1 is turned on, and the signal processing module 2 is supplied with operating voltage through the filter inductor L4.

[0104] In another exemplary embodiment of this application, such as Figure 6As shown, the power management controller module 16 includes a power management controller U2. The carrier transceiver power control terminal of the power management controller U2 is connected to the power conversion circuit 17, the carrier receive control terminal of the power management controller U2 is connected to the signal receiving module 1, and the carrier transmit control terminal of the power management controller U2 is connected to the signal transmitting module 3. The carrier transceiver power control terminal, the carrier receive control terminal, and the carrier transmit control terminal are each any I / O port of the power management controller U2.

[0105] In this embodiment, after receiving a signal from the signal receiving module 1 indicating that carrier data needs to be transmitted, the power management controller U2 enables the power conversion circuit 17. This allows the power conversion circuit 17 to convert the output voltage of the external power supply 15 into the operating voltage of the signal receiving module 1, signal processing module 2, and signal transmitting module 3, enabling them to operate normally. When the power management controller U2 receives a signal from the signal receiving module 1 indicating that carrier data transmission is not required, it controls the power conversion circuit 17 to operate in a low-power mode. This allows the signal receiving module 1 to only monitor whether carrier data transmission is needed, and puts the signal processing module 2 and signal transmitting module 3 into a sleep state. This continues until the signal receiving module 1 detects that carrier data transmission is needed, at which point the power management controller U2 again controls the power conversion circuit 17 to operate normally, enabling the signal receiving module 1, signal processing module 2, and signal transmitting module 3 to operate normally.

[0106] In another exemplary embodiment of this application, the connection circuit of each terminal of the power management controller U2 is as follows: Figure 6 As shown, P1 is the programming interface, and E1 is the antenna of model BWIPX-5-001E, which receives radio frequency signals from other control devices (such as during debugging), including parameter configuration instructions for the power management controller U2, such as setting the output voltage and current thresholds, and adjusting the power supply operating mode.

[0107] In another exemplary embodiment of this application, the repeater based on medium-voltage cable carrier communication described above further includes a housing, on which a first interface component and a second interface component are disposed.

[0108] The signal receiving module 1, signal processing module 2, signal transmitting module 3, and power management module 14 are all housed within this enclosure.

[0109] The signal receiving module 1 is connected to the preceding medium-voltage cable through the first interface component, and the signal transmitting module 3 is connected to the following medium-voltage cable through the second interface component.

[0110] In another exemplary embodiment of this application, the first interface component and the second interface component described above have lightning strike and overvoltage protection functions.

[0111] In another exemplary embodiment of this application, the repeater based on medium-voltage cable carrier communication described above also includes a remote monitoring platform.

[0112] In this embodiment, the relevant data of the repeater is uploaded to a remote monitoring platform (terminal device such as mobile phone or computer) through a wireless communication module. Users can view the working status, operating parameters, communication quality and other information of the repeater in real time through the remote monitoring platform.

[0113] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A repeater based on medium-voltage cable carrier communication, characterized in that, The repeater based on medium-voltage cable carrier communication includes a signal receiving module (1), a signal processing module (2), and a signal transmitting module (3) connected in sequence, wherein: The input end of the signal receiving module (1) is connected to the output end of the preceding medium-voltage cable, the output end of the signal transmitting module (3) is connected to the input end of the following medium-voltage cable, and the signal processing module (2) is used to demodulate, shape, amplify and modulate the carrier signal output by the signal receiving module (1) in sequence.

2. The repeater based on medium-voltage cable carrier communication according to claim 1, characterized in that, The signal processing module (2) includes a baseband modulation and demodulation module (4) and a shaping circuit (5) and an amplification circuit (6) connected in sequence, wherein: The first input terminal of the baseband modulation and demodulation module (4) is connected to the output terminal of the signal receiving module (1), and the first output terminal of the baseband modulation and demodulation module (4) is connected to the input terminal of the shaping circuit (5). The output terminal of the amplifier circuit (6) is connected to the second input terminal of the baseband modulation and demodulation module (4), and the second output terminal of the baseband modulation and demodulation module (4) is connected to the input terminal of the signal transmission module (3).

3. The repeater based on medium-voltage cable carrier communication according to claim 1, characterized in that, The signal processing module (2) includes an analog-to-digital converter module (7), a digital signal processor (8), and a digital-to-analog converter module (9) connected in sequence, wherein: The input terminal of the analog-to-digital converter (7) is connected to the output terminal of the signal receiving module (1), and the output terminal of the digital-to-analog converter (9) is connected to the input terminal of the signal transmitting module (3).

4. The repeater based on medium-voltage cable carrier communication according to claim 1, characterized in that, The signal receiving module (1) includes a first signal coupling circuit (10), the input terminal of the first signal coupling circuit (10) is connected to the output terminal of the signal receiving module (1), and the output terminal of the first signal coupling circuit (10) is the input terminal of the signal processing module (2).

5. The repeater based on medium-voltage cable carrier communication according to claim 4, characterized in that, The signal receiving module (1) further includes a filtering circuit (11), the input end of the first signal coupling circuit (10) is connected to the output end of the preceding medium-voltage cable, the output end of the first signal coupling circuit (10) is connected to the input end of the filtering circuit (11), and the output end of the filtering circuit (11) is connected to the input end of the signal processing module (2).

6. The repeater based on medium-voltage cable carrier communication according to claim 1, characterized in that, The signal transmitting module (3) includes a second signal coupling circuit (12), the input end of which is connected to the output end of the signal processing module (2), and the output end of which is connected to the input end of the next section of medium voltage cable.

7. The repeater based on medium-voltage cable carrier communication according to claim 6, characterized in that, The signal transmitting module (3) further includes a power amplifier (13), the input terminal of which is connected to the output terminal of the signal processing module (2), and the output terminal of which is connected to the input terminal of the second signal coupling circuit (12).

8. The repeater based on medium-voltage cable carrier communication according to claim 1, characterized in that, It also includes a power management module (14), the output of which is connected to the power supply of the signal receiving module (1), the signal processing module (2) and the signal transmitting module (3).

9. The repeater based on medium-voltage cable carrier communication according to claim 8, characterized in that, The power management module (14) includes an external power supply (15), a power management controller module (16), and a power conversion circuit (17) connected in sequence, wherein: The input terminal of the power management controller module (16) is connected to the signal receiving module (1), the input terminal of the power conversion circuit (17) is connected to the external power supply (15) and the output terminal of the power management controller module (16), and the output terminal of the power conversion circuit (17) is connected to the power supply terminals of the signal receiving module (1), the signal processing module (2) and the signal sending module (3).

10. The repeater based on medium-voltage cable carrier communication according to claim 8, characterized in that, It also includes a housing, on which a first interface component and a second interface component are provided; The signal receiving module (1), signal processing module (2), signal transmitting module (3), and power management module (14) are all housed within the outer casing; The signal receiving module (1) is connected to the first section of medium-voltage cable through the first interface component, and the signal transmitting module (3) is connected to the second section of medium-voltage cable through the second interface component.

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