Communication equipment and systems for distribution network status monitoring

Abstract

The present disclosure provides a communication device and system for monitoring the status of a distribution network, the device comprising: a radio frequency module for receiving or sending radio frequency signals, and realizing the conversion between baseband signals and the radio frequency signals; a baseband signal processing module connected to the radio frequency module, for realizing the conversion between the baseband signal and the interactive signal; a human-computer interaction module connected to the baseband signal processing module, for generating the interactive signal based on user operations or displaying the interactive signal. According to the present disclosure, the message sending and receiving process can be stable and reliable, data transmission is not restricted by location, the transmission distance is long, and the coverage range is wide; using LPWAN as a communication network, dynamic remote monitoring of distribution equipment can be realized, and the power supply capacity of the distribution network can be effectively guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication device and system for monitoring the status of a distribution network. Background Art

[0002] The distribution network is an important part of the power grid. There are many distribution equipment, which are widely distributed and have a complex operating environment. The equipment operation and management are difficult. At present, the coverage rate of distribution automation master stations has reached 90%, the terminal access rate has reached 50%, and the coverage rate of electricity information collection has exceeded 98%. In addition to the conventional collection of electrical quantities by various intelligent terminals, the distribution network status monitoring also includes a large number of environmental temperature and humidity, noise, gas, water level, micro-meteorology, door switches and other status quantities of various categories. Intelligent sensors are widely distributed, of various types and in large numbers. The construction of the distribution Internet of Things needs to solve the comprehensive perception of the distribution network lines and standby operation status, the extensive interconnection of equipment, and the plug-and-play of terminals. Applicable communication technology is needed to solve the access requirements of multi-service terminals and massive sensors. However, the existing terminal communication access network is difficult to fully cover, and does not fully consider the "big connection" requirements of "small data", and cannot meet the status monitoring requirements of medium and low voltage distribution equipment with many points and complex basement environments. Summary of the invention

[0003] In view of this, an object of the present disclosure is to provide a communication device and system for monitoring the status of a power distribution network.

[0004] Based on the above purpose, the present disclosure provides a communication device for power distribution network status monitoring, including:

[0005] A radio frequency module, used for receiving or sending radio frequency signals, and realizing conversion between baseband signals and the radio frequency signals;

[0006] A baseband signal processing module, connected to the radio frequency module, for realizing conversion between the baseband signal and the interactive signal;

[0007] The human-computer interaction module is connected to the baseband signal processing module and is used to generate the interaction signal or display the interaction signal based on the user operation.

[0008] Optionally, the receiving end circuit of the radio frequency module includes:

[0009] A low noise amplifier, connected to the antenna, for adding a low noise signal to the radio frequency signal received by the antenna to obtain a low noise radio frequency signal;

[0010] a radio frequency transceiver, connected to the low noise amplifier, for converting the low noise radio frequency signal into the baseband signal, and sending the baseband signal to a baseband signal processing module;

[0011] The transmitting end circuit of the radio frequency module may include the radio frequency transceiver.

[0012] Optionally, the baseband signal processing unit includes:

[0013] The FPGA signal processing module is connected to the RF transceiver and is used to receive the baseband signal from the RF transceiver and perform corresponding signal processing on the baseband signal; or after performing corresponding signal processing on the baseband signal, the processed baseband signal is sent to the RF transceiver.

[0014] Optionally, the human-computer interaction module includes: an ARM control processor connected to the FPGA signal processing module, and configured to generate the interaction signal based on user operation or display the interaction signal.

[0015] Optionally, the baseband signal processing module includes a data reading module, a Turbo encoding module, an ultra-narrowband modulation module, an ultra-narrowband filtering module and a carrier aggregation module connected in sequence;

[0016] Among them, the user operates through the human-computer interface and generates a corresponding command signal through the human-computer interaction module. After the data reading module receives the command signal, it encodes it through the Turbo encoding module to obtain a coded signal, and then modulates it through the ultra-narrowband modulation module to obtain a modulated baseband signal. The baseband signal is then filtered through the ultra-narrowband modulation filter module to obtain a filtered signal. The filtered signal is carrier aggregated through the carrier aggregation module according to spectrum sensing to obtain an aggregated signal; the aggregated signal is converted into an RF signal through the RF transceiver and sent through the antenna.

[0017] Optionally, the baseband signal processing module includes a carrier decoupling module, a burst capture module, and a timing recovery module connected in sequence, as well as an ultra-narrowband demodulation module and a Turbo decoding module;

[0018] The device receives multiple radio frequency signals via multiple antennas, the multiple radio frequency signals are amplified by the low noise amplifier, and then converted into multiple baseband signals after down-conversion by the radio frequency transceiver. The multiple baseband signals are respectively decoupled by the corresponding carrier decoupling modules based on spectrum sensing to obtain multiple decoupled signals. The multiple decoupled signals are synthesized into one signal after passing through the burst capture module and the timing recovery module, and demodulated by the ultra-narrowband demodulation module to obtain a demodulated signal. The demodulated signal is passed through the Turbo decoding module to obtain the interactive signal, and the interactive signal is displayed in the human-computer interface through the human-computer interaction module.

[0019] According to an embodiment of the present disclosure, a communication system for monitoring the state of a distribution network is also provided, comprising: at least one wireless terminal and the communication device for monitoring the state of a distribution network as described above, wherein the at least one wireless terminal and the communication device form a star structure and communicate based on LPWAN.

[0020] Optionally, the communication device monitors the operating status of the wireless terminal in real time.

[0021] Optionally, the communication device sends the operating status data of the wireless terminal to a remote server for storage or stores it locally.

[0022] Optionally, the communication device issues an alarm when the operating data of the wireless terminal exceeds a set threshold or a failure occurs in the wireless terminal.

[0023] From the above, it can be seen that the communication equipment and system for distribution network status monitoring provided by the present disclosure have stable and reliable message sending and receiving process, data transmission is not restricted by location, transmission distance is long, coverage is wide, transmission delay is low, it can adapt to the increase and decrease and maintenance of distribution network equipment, and facilitate the expansion of data acquisition system, support remote management, and can monitor and manage the system through PC, mobile phone, etc. Using LPWAN as a communication network, dynamic remote monitoring of distribution equipment can be realized, effectively ensuring the power supply capacity of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a schematic diagram of a communication system for power distribution network status monitoring according to an embodiment of the present disclosure;

[0026] Figure 2 is a schematic block diagram of a communication device according to an embodiment of the present disclosure;

[0027] Figure 3 is a schematic block diagram of a receiving end circuit according to an embodiment of the present disclosure;

[0028] Figure 4 is a schematic block diagram of a baseband signal processing unit and a human-computer interaction module according to an embodiment of the present disclosure;

[0029] Figure 5-Figure 6 The figure is a schematic diagram of the signal processing of the communication device according to the embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0031] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] The distribution network has undergone nearly a decade of intelligent construction and has achieved access to a variety of terminal devices. However, the existing terminal communication access network is difficult to fully cover, and does not fully consider the "big connection" needs of "small data", and cannot meet the status monitoring needs of medium and low voltage distribution equipment in a wide range of locations and complex basement environments.

[0033] Based on the above considerations, the embodiments of the present disclosure provide a communication device and system for distribution network status monitoring, which adopts low-power wide-area Internet of Things communication technology and has the characteristics of low operation and maintenance cost, low terminal power consumption, and long communication distance. While solving the ultra-low power consumption problem, it realizes wide-area interconnection and truly realizes low-cost full coverage of large-area and long-distance Internet of Things.

[0034] See also Figure 1 , Figure 1 FIG. 1 is a schematic diagram of a communication system for monitoring the state of a power distribution network according to an embodiment of the present disclosure. Figure 1 As shown, the communication system 100 for power distribution network status monitoring may include: a communication device 110 for power distribution network status monitoring and at least one wireless terminal 120. The communication device 110 and each wireless terminal 120 form a star topology structure, and use wireless communication methods, such as LPWAN (Low-Power Wide-Area Network) for communication.

[0035] In some embodiments, the communication device 110 may include a wireless base station gateway, which may serve as a network control center of the system 100 and be used to build and manage the network of the system 100 .

[0036] In some embodiments, the wireless terminal 120 may include: a FTU (Feeder terminal unit), a DTU (Data Transfer unit), a TTU (distribution Transformer supervisory Terminal Unit), a concentrator or a smart meter.

[0037] Specifically, the wireless terminal 120 can detect the downlink broadcast channel and synchronization beacon of the communication device 110 after power-on, actively send a network access request signal to the communication device 110, and register on the communication device 110. The communication device 110 allocates the wireless terminal node address according to the service type and priority of the wireless terminal 120. The system 100 realizes two-way communication between the communication device 110 and multiple wireless terminals 120 through the channel access control protocol. The communication device 110 can access the power Internet of Things platform through the power transmission network to realize the connection and service of various business terminals and sensor data on site to the business application system.

[0038] In some embodiments, the operation status of the wireless terminal 120 can be monitored in real time through the communication device 110. For example, the wireless terminal 120 can send its real-time operation data to the communication device 110 and display it in the human-machine interface. In this way, it is convenient for users to query and monitor the operation status of each terminal. Furthermore, in some embodiments, the communication device 110 can alarm when the operation data of the wireless terminal 120 exceeds a set threshold or a fault occurs.

[0039] In some embodiments, the operation status data of the wireless terminal 120 can be sent to a remote server for storage through the communication device 110. For example, after the communication device 110 obtains the real-time operation status data from the wireless terminal 120, it can be sent to the remote server via the optical fiber network to achieve subsequent data processing, analysis and access.

[0040] In some embodiments, the operating status data of the wireless terminal 120 may be stored locally via the communication device 110 .

[0041] According to the embodiments of the present disclosure, using LPWAN as the communication network for monitoring the status of distribution network equipment can realize dynamic remote monitoring of distribution equipment and effectively ensure the power supply capacity of the distribution network.

[0042] In some embodiments, see Figure 2 , Figure 2 A schematic block diagram of a communication device according to an embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the communication device 110 may include:

[0043] The radio frequency module 111 is used to receive or send radio frequency signals and realize conversion between baseband signals and the radio frequency signals;

[0044] A baseband signal processing module 112, connected to the RF module 111, for implementing conversion between the baseband signal and the interactive signal;

[0045] The human-computer interaction module 113 is connected to the baseband signal processing module 112 and is used to generate the interaction signal or display the interaction signal based on the user operation.

[0046] Among them, the communication device 110 generates a first interactive signal in response to the user's operation through the human-computer interaction module 113, and sends the first interactive signal to the baseband signal processing module 112; after receiving the first interactive signal, the baseband signal processing module 112 performs channel coding, baseband modulation, shaping filtering, framing and other signal processing on the interactive signal to obtain a first baseband signal, and sends the first baseband signal to the RF module 111; after receiving the first baseband signal, the RF module 111 converts the first baseband signal into a first RF signal and transmits it via the antenna. The wireless terminal 120 can receive the first RF signal via the antenna of the wireless terminal 120 itself, thereby realizing data transmission from the communication device 110 to the wireless terminal 120.

[0047] Correspondingly, the wireless terminal 120 can send a second RF signal via the antenna of the wireless terminal 120 itself; the RF module 111 of the communication device 110 receives the second RF signal via the antenna of the communication device 110, converts the second RF signal into a second baseband signal, and sends it to the baseband signal processing module 112; after receiving the second baseband signal, the baseband signal processing module 112 filters, synchronizes, performs diversity reception, despreading and decoding on the second baseband signal to obtain a second interaction signal, and sends it to the human-computer interaction module 113; after receiving the second interaction signal, the human-computer interaction module 113 displays it via the display interface.

[0048] In some embodiments, the communication device 110 may further include: a power clock module 114, connected to the baseband signal processing module 112 and the radio frequency module 111, for providing power and a clock signal to the baseband signal processing module 112 and the radio frequency module 111. Further, the power clock module 114 may include a power management module 1141 and a clock management module 1142.

[0049] In some embodiments, the RF module 111 may include: a wireless transceiver. The wireless transceiver supports two modes, TDD (Test-Driven Development) and FDD (Frequency Division Duplexing), and provides a self-calibration and automatic gain control system. In some embodiments, the RF module 111 may include a receiving end circuit and a transmitting end circuit.

[0050] See also Figure 3 , Figure 3 A schematic block diagram of a receiving end circuit according to an embodiment of the present disclosure is shown in FIG.

[0051] like Figure 3 As shown, the receiving end circuit of the RF module 111 may include:

[0052] A low noise amplifier LNA is connected to the antenna and is used to add a low noise signal to the radio frequency signal received by the antenna to obtain a low noise radio frequency signal;

[0053] The RF transceiver is connected to the low noise amplifier LNA, and is used to convert the low noise RF signal into the baseband signal, and send the baseband signal to the baseband signal processing module 112 .

[0054] In some embodiments, the RF transceiver may include a chip model AD9361.

[0055] The receiving circuit adds a low noise signal to the RF signal received from the antenna through a low noise amplifier LNA to solve the problem of insufficient RF power. Then, the RF signal is converted into a baseband signal through the RF transceiver AD9361, and the baseband signal is sent to the baseband signal processing unit 112 for further processing.

[0056] In some embodiments, the transmitting end circuit of the RF module 111 may include the RF transceiver. In other words, the RF module 111 may implement the transmission or reception of RF signals based on the RF transceiver.

[0057] In some embodiments, see Figure 4 , Figure 4 FIG. 4 is a schematic block diagram of a baseband signal processing unit and a human-computer interaction module according to an embodiment of the present disclosure. Figure 4 As shown, the baseband signal processing unit 112 may include:

[0058] The FPGA signal processing module is connected to the RF transceiver and is used to receive the baseband signal from the RF transceiver and perform corresponding signal processing on the baseband signal; or after performing corresponding signal processing on the baseband signal, the processed baseband signal is sent to the RF transceiver.

[0059] In some embodiments, the FPGA signal processing module may perform corresponding signal processing on the baseband signal, including at least one of the following: filtering, synchronization, diversity reception, despreading and decoding, error correction processing, modulation and demodulation, spread spectrum despreading, and delay adjustment.

[0060] In some embodiments, Figure 4 As shown, the human-computer interaction module 113 may include: an ARM control processor connected to the FPGA signal processing module, and configured to generate the interaction signal based on the user operation or display the interaction signal.

[0061] In some embodiments, see Figure 5-Figure 6 , Figure 5-Figure 6 FIG. 2 shows a schematic diagram of a signal processing of a communication device according to an embodiment of the present disclosure. Figure 5 As shown, the baseband signal processing module 112 of the communication device 110 may include a data reading module, a Turbo coding module, an ultra-narrowband modulation module, an ultra-narrowband filtering module and a carrier aggregation module connected in sequence. The user operates through the human-machine interface and generates a corresponding command signal through the human-machine interaction module (not shown). After the data reading module in the baseband signal processing module 112 receives the command signal, it encodes it through the Turbo coding module to obtain a coded signal, and then modulates it through the ultra-narrowband modulation module to obtain a modulated baseband signal. The baseband signal is then filtered through the ultra-narrowband modulation and filtering module to obtain a filtered signal. The filtered signal is aggregated through the carrier aggregation module according to spectrum sensing to obtain an aggregated signal. The aggregated signal is then converted into an RF signal by the RF transceiver AD9361 in the RF module 111 and sent via the antenna.

[0062] like Figure 6 As shown, the communication device 110 can be provided with multiple (for example, 2 or more) antennas to receive radio frequency signals. The baseband signal processing module 112 of the communication device 110 can include multiple (for example, the same number as the number of antennas) sequentially connected carrier decoupling modules, burst capture modules, and timing recovery modules, as well as ultra-narrowband demodulation modules and turbo decoding modules. The communication device 110 receives multiple radio frequency signals via multiple antennas. The multiple radio frequency signals are amplified by the low noise amplifier (not shown) of the radio frequency module, and then down-converted by the radio frequency transceiver AD9361 to multiple baseband signals. The multiple baseband signals are respectively transmitted via the corresponding carrier decoupling modules based on spectrum sensing (with Figure 5The spectrum sensing in the transmitter as shown in the figure is synchronized and consistent) and carrier decoupling is performed to obtain multiple decoupled signals, which are synthesized into one signal after passing through a burst capture module and a timing recovery module, and demodulated by an ultra-narrowband demodulation module to obtain a demodulated signal, and the demodulated signal is passed through a Turbo decoding module to obtain an interactive signal, which can be displayed in a human-computer interface via a human-computer interaction module.

[0063] It can be seen that according to the communication equipment and system for power distribution network status monitoring of the embodiment of the present disclosure, the message receiving and sending process is stable and reliable, data transmission is not restricted by location, the transmission distance is long, and the coverage is wide; the transmission delay is low; it can adapt to the increase and decrease and maintenance of distribution network equipment, and facilitate the expansion of the data acquisition system; it supports remote management, and the system can be monitored and managed through a PC, mobile phone, etc. In addition, the communication parameters can be flexibly configured online to realize dynamic remote monitoring and status monitoring of power distribution equipment, effectively ensuring the power supply capacity of the distribution network.

[0064] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0065] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present disclosure difficult to understand, the known power / ground connections to the integrated circuit (IC) chips and other components may or may not be shown in the provided figures. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present disclosure difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present disclosure will be implemented (that is, these details should be fully within the scope of understanding of those skilled in the art). Where specific details (e.g., circuits) are set forth to describe exemplary embodiments of the present disclosure, it is apparent to those skilled in the art that the embodiments of the present disclosure can be implemented without these specific details or with changes in these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0066] Although the present disclosure has been described in conjunction with specific embodiments of the present disclosure, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0067] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A communication device for monitoring the state of a distribution network, comprising: A radio frequency module, used for receiving or sending radio frequency signals, and realizing conversion between baseband signals and the radio frequency signals; The receiving end circuit of the RF module includes: a low noise amplifier connected to the antenna, used to add a low noise signal to the RF signal received by the antenna to obtain a low noise RF signal; a RF transceiver connected to the low noise amplifier, used to convert the low noise RF signal into the baseband signal, and send the baseband signal to the baseband signal processing module; A baseband signal processing module, connected to the RF module, for realizing the conversion between the baseband signal and the interactive signal; the baseband signal processing module includes a data reading module, a Turbo encoding module, an ultra-narrowband modulation module, an ultra-narrowband filtering module and a carrier aggregation module connected in sequence; the baseband signal processing module also includes: an FPGA signal processing module, connected to the RF transceiver, for receiving the baseband signal from the RF transceiver and performing corresponding signal processing on the baseband signal; or after performing corresponding signal processing on the baseband signal, sending the processed baseband signal to the RF transceiver; A human-computer interaction module, connected to the baseband signal processing module, for generating the interaction signal based on user operation or displaying the interaction signal; the human-computer interaction module includes: an ARM control processor, connected to the FPGA signal processing module, for generating the interaction signal based on user operation or displaying the interaction signal; A power clock module, connected to the baseband signal processing module and the radio frequency module, and used to provide power and clock signals to the baseband signal processing module and the radio frequency module; The user operates through the human-machine interface and generates a corresponding command signal through the human-machine interaction module. After receiving the command signal, the data reading module encodes it through the Turbo encoding module to obtain a coded signal, and then modulates it through the ultra-narrowband modulation module to obtain a modulated baseband signal. The baseband signal is then filtered through the ultra-narrowband modulation filter module to obtain a filtered signal. The filtered signal is carrier aggregated through the carrier aggregation module according to spectrum sensing to obtain an aggregated signal; the aggregated signal is converted into a radio frequency signal by the radio frequency transceiver and then sent through the antenna; The baseband signal processing module also includes a carrier decoupling module, a burst capture module, and a timing recovery module, as well as an ultra-narrowband demodulation module and a Turbo decoding module that are connected in sequence in multiple channels; The device receives multiple radio frequency signals via multiple antennas, the multiple radio frequency signals are amplified by the low noise amplifier, and then converted into multiple baseband signals after down-conversion by the radio frequency transceiver. The multiple baseband signals are respectively decoupled by the corresponding carrier decoupling modules based on spectrum sensing to obtain multiple decoupled signals. The multiple decoupled signals are synthesized into one signal after passing through the burst capture module and the timing recovery module, and demodulated by the ultra-narrowband demodulation module to obtain a demodulated signal. The demodulated signal is passed through the Turbo decoding module to obtain the interactive signal, and the interactive signal is displayed in the human-computer interface through the human-computer interaction module.

2. A communication system for monitoring the state of a distribution network, comprising: At least one wireless terminal and the communication device for power distribution network status monitoring according to claim 1, wherein the at least one wireless terminal and the communication device form a star structure and communicate based on LPWAN.

3. The system according to claim 2, wherein: The communication device monitors the operating status of the wireless terminal in real time.

4. The system according to claim 2, wherein: The communication device sends the running status data of the wireless terminal to a remote server for storage or stores it locally.

5. The system according to claim 2, wherein: The communication device generates an alarm when the operation data of the wireless terminal exceeds a set threshold or a failure occurs in the wireless terminal.

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