Device and network for realizing signal conversion between optical communication and electric power communication

Abstract

The invention provides a device for realizing signal conversion between optical communication and electric power communication, which is arranged in a basement provided with an electric power line and comprises two serial port analog communication to electric power line communication units and two optical modems, the two serial port analog communication-to-power line communication units are connected with two ends of a power line; an optical port of an optical modem is connected with a ground optical fiber and is connected with ground communication equipment, and an electric port is connected with a serial port analog communication-to-power line communication unit; an optical port access tail fiber of the other optical modulator-demodulator is connected with basement communication equipment, and an electric port of the other optical modulator-demodulator is connected with the other serial port analog communication-to-power line communication unit; when the power line is electrified, the ground communicates with the communication equipment of the basement, and signal conversion between optical communication and power communication is completed by the two serial port analog communication to power line communication units and the two optical modems. According to the invention, the power line for temporary power utilization of the basement can be networked and communicated with the ground optical fiber, so that the cost of laying signal lines is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power communication, and in particular to a signal conversion device and a network for realizing optical communication and power communication. Background Art

[0002] The communication method used by the power grid system is mainly optical fiber communication. Optical fiber communication requires laying optical fiber or using special power lines, which usually serves the communication between the ground. However, it is difficult to communicate with the ground in real time in the basement without mobile signals. Therefore, in order to communicate between the ground and the basement, it is usually necessary to lay additional signal lines.

[0003] However, when the basement is under construction, there is only temporary electricity but no signal line is laid. Especially in the case of emergency construction, poor wireless signal conditions and power outages, the basement cannot communicate with the outside world. However, the existing technology has not solved the communication difficulties between the basement and the ground when the signal line is not laid. Therefore, it is necessary to provide a signal conversion device for realizing optical communication and power communication, which can connect the power line of temporary power supply in the basement (such as the power line of the backup DC power supply) with the ground optical fiber for networking communication. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a signal conversion device and network for realizing optical communication and power communication, which can connect the power lines for temporary power supply in the basement with the ground optical fibers for networking and communication, thereby greatly reducing the cost of laying signal lines.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a signal conversion device for optical communication and power communication, which is arranged in a basement where power lines are laid, and includes two serial analog communication to power line communication units and two optical modems; wherein,

[0006] The two serial port analog communication to power line communication units are respectively connected to two ends of the power line;

[0007] The optical port of one of the two optical modems is connected to the ground optical fiber and connected to the ground communication equipment through the ground optical fiber, and the electrical port is connected to the end of a serial port analog communication to power line communication unit away from the power line; the optical port of the other of the two optical modems is connected to the pigtail and connected to the basement communication equipment through the pigtail, and the electrical port is connected to the end of another serial port analog communication to power line communication unit away from the power line;

[0008] Among them, when the power line is energized, the ground communication equipment communicates with the basement communication equipment, and the optical modem of the initiator first modulates the optical signal into an analog electrical signal, and converts it into a power line carrier communication signal that can be carried on the power line through the corresponding serial port analog communication to power line communication unit, and then the serial port analog communication to power line communication unit of the receiver parses the power line carrier communication signal, and then enters the receiver's optical modem for demodulation; wherein, the initiator is the party that initiates communication between the ground communication equipment and the basement communication equipment; the receiver is the party that receives communication between the ground communication equipment and the basement communication equipment.

[0009] Each of the serial port analog communication to power line communication units comprises a serial port interface circuit, a G3-PLC module and a power supply / carrier coupling module;

[0010] One end of the serial port interface circuit is connected to the electrical port of a corresponding optical modem, and the other end is connected to one end of the G3-PLC module, and is used to receive the first analog electrical signal output by the connected optical modem after modulating the optical signal; or forward the second analog electrical signal output by the connected G3-PLC module to the connected optical modem for demodulation;

[0011] The other end of the G3-PLC module is connected to the first end of the power supply / carrier coupling module, and is used to convert the first analog electrical signal output by the connected serial port interface circuit into a first digital signal, and encode and modulate the first digital signal into a power line carrier communication signal that can be carried by the power line; or, reversely demodulate the power line carrier communication signal decoupled and forwarded by the connected power supply / carrier coupling module into a second digital signal, and reversely convert the second digital signal into a second analog electrical signal before sending it to the connected serial port interface circuit;

[0012] The second end of the power supply / carrier coupling module is connected to the power line, and the third end is formed as an access end of an uninterruptible power supply, which is used to connect to the uninterruptible power supply when the power line is not powered, and allow the uninterruptible power supply to the power line uninterruptibly; and when the power line is powered, couple the power line carrier communication signal to the power line or decouple the power line carrier communication signal from the power line.

[0013] Wherein, the G3-PLC module includes a signal converter and an OFDM modem; wherein,

[0014] One end of the signal converter is connected to the serial port interface circuit, and the other end is connected to one end of the OFDM modem, for mutual conversion between analog and digital signals;

[0015] The other end of the OFDM modem is connected to the power / carrier coupling module, and is used for mutual conversion between the power line carrier communication signal and the first digital signal and the second digital signal respectively; wherein the power line carrier communication signal is an analog signal of a certain bandwidth frequency that is obtained by encoding the first digital signal into a signal with Reed-3olomon encoding, and then processing it through inverse Fourier transform, adding cyclic prefix processing and adding window function.

[0016] Wherein, the power supply / carrier coupling module includes an output filter, a carrier coupler and a power supply / carrier integrated interface module; wherein,

[0017] One end of the output filter is connected to the other end of the OFDM modem, and the other end is connected to one end of the carrier coupler, for performing bandpass filtering on the power line carrier communication signal;

[0018] The other end of the carrier coupler is connected to an input end of the power supply / carrier integrated interface module, and is used to couple the power line carrier communication signal to the power supply / carrier integrated interface module; or, decouple the power line carrier communication signal from the power supply / carrier integrated interface module;

[0019] The other input end of the power supply / carrier integrated interface module is formed as an access end of an uninterruptible power supply, and the output end is connected to the power line, and is used to access the uninterruptible power supply when the power line is not powered, and allow the uninterruptible power supply to provide uninterruptible power to the power line; and when the power line is powered, load or receive the power line carrier communication signal on the power line.

[0020] Wherein, when the power line is connected to the power supply / carrier integrated interface module, it is a single-phase two-wire or three-phase three-wire power line.

[0021] Wherein, the uninterruptible power supply includes a bypass switch, a rectifier, a battery, an inverter and a static switch; wherein,

[0022] The input end of the bypass switch is connected to the mains, and the output end is connected to the input end of the rectifier and the first input end of the static switch;

[0023] The output end of the rectifier is connected to the positive electrode of the battery and the input end of the inverter;

[0024] The negative electrode of the battery is connected to the second input terminal of the inverter;

[0025] The output end of the inverter is connected to the second input end of the static switch;

[0026] The output end of the static switch is connected to the power line or the power supply / carrier integrated interface module, and includes two groups of reverse-parallel diode pairs.

[0027] Wherein, each of the serial port analog communication to power line communication units is connected to the electrical port of the corresponding optical modem via a predetermined analog signal bus; wherein,

[0028] The analog signal bus is one of an R3232 communication bus, an R3485 communication bus and an R3422 communication bus.

[0029] An embodiment of the present invention also provides a network for realizing optical communication and electric power communication, including ground communication equipment, basement communication equipment and the aforementioned signal conversion device for realizing optical communication and electric power communication; wherein the signal conversion device connects the ground communication equipment and the basement communication equipment together and realizes network communication between the two.

[0030] Implementing the embodiments of the present invention has the following beneficial effects:

[0031] The signal conversion device in the present invention is arranged in a basement where power lines are laid, and can connect ground communication equipment with basement communication equipment, and complete the signal conversion between optical communication and power communication when the power lines are energized, so as to realize communication between ground communication equipment and basement communication equipment, thereby achieving the purpose of networking and communicating between the power lines for temporary power use in the basement and the ground optical fibers, greatly reducing the cost of laying signal lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0033] Figure 1 A schematic diagram of the structure of a device for realizing signal conversion between optical communication and power communication provided in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the structure of a single serial port analog communication to power line communication unit in a signal conversion device for realizing optical communication and power communication provided in an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the structure of an uninterruptible power supply in a signal conversion device for realizing optical communication and power communication provided in an embodiment of the present invention;

[0036] Figure 4 This is an application scenario diagram of a device for realizing signal conversion between optical communication and power communication provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] like Figure 1 As shown, a signal conversion device for realizing optical communication and power communication is proposed in an embodiment of the present invention, which is arranged in a basement where power lines are laid, and includes two serial analog communication to power line communication units 1 and two optical modems 2; wherein,

[0039] Two serial port analog communication to power line communication units 1 are respectively connected to two ends of the power line L;

[0040] The optical port of one of the two optical modems 2 is connected to the ground optical fiber and connected to the ground communication device D1 through the ground optical fiber, and the electrical port is connected to the end of a serial port analog communication to power line communication unit 1 away from the power line L through a predetermined analog signal bus; the optical port of the other of the two optical modems 2 is connected to the pigtail and connected to the basement communication device D2 through the pigtail, and the electrical port is connected to the end of another serial port analog communication to power line communication unit 1 away from the power line L; wherein the analog signal bus is one of the R3232 communication bus, the R3485 communication bus and the R3422 communication bus;

[0041] Among them, when the power line L is energized, the ground communication equipment D1 communicates with the basement communication equipment D2. The initiator's optical modem 2 first modulates the optical signal into an analog electrical signal, and converts it into a power line carrier communication signal that can be carried on the power line L through the corresponding serial port analog communication to power line communication unit 1. Then, the receiver's serial port analog communication to power line communication unit 1 parses the power line carrier communication signal, and then enters the receiver's optical modem 2 for demodulation; among them, the initiator is the party that initiates the communication between the ground communication equipment D1 and the basement communication equipment D2; the receiver is the party that receives the communication between the ground communication equipment D1 and the basement communication equipment D2.

[0042] It should be noted that if there is temporary power supply in the basement, the two serial port analog communication to power line communication units 1 can directly use the powered power line L. If there is no temporary power supply or power outage in the basement, it is necessary to consider introducing city power or uninterruptible AC power into part of the power line L connected between the two serial port analog communication to power line communication units 1 in the future.

[0043] It is understandable that if no ground optical fiber is laid between the optical modem 2 and the ground communication device D1, the pigtail can be connected to the ground communication device D1 to communicate with the ground optical fiber network.

[0044] In the embodiment of the present invention, Figure 2 As shown, each serial port analog communication to power line communication unit 1 includes a serial port interface circuit 11, a G3-PLC module 12 and a power supply / carrier coupling module 13; wherein,

[0045] One end of the serial port interface circuit 11 is connected to the electrical port of a corresponding optical modem 2, and the other end is connected to one end of the G3-PLC module 12, and is used to receive the first analog electrical signal output by the connected optical modem 1 after modulating the optical signal; or forward the second analog electrical signal output by the connected G3-PLC module 12 to the connected optical modem 1 for demodulation;

[0046] The other end of the G3-PLC module 12 is connected to the first end of the power supply / carrier coupling module 13, and is used to convert the first analog electrical signal output by the connected serial port interface circuit 11 into a first digital signal, and encode and modulate the first digital signal into a power line carrier communication signal that can be carried by the power line L; or, reversely demodulate the power line carrier communication signal decoupled and forwarded by the connected power supply / carrier coupling module 13 into a second digital signal, and reversely convert the second digital signal into a second analog electrical signal, and then send it to the connected serial port interface circuit 11; wherein the G3-PLC module 12 includes a signal converter 121 and an OFDM modem 122; the signal conversion One end of the device 121 is connected to the serial port interface circuit 11, and the other end is connected to one end of the OFDM modem 122 for mutual conversion between analog and digital signals; the other end of the OFDM modem 122 is connected to the power supply / carrier coupling module 13, which is used for mutual conversion between the power line carrier communication signal and the first digital signal and the second digital signal respectively; wherein the power line carrier communication signal is an analog signal of a certain bandwidth frequency (such as 150kHz to 500kHz) obtained by inverse Fourier transform, adding cyclic prefix processing and adding window function processing after the first digital signal is encoded into a signal with Reed-3olomon encoding;

[0047] The second end of the power supply / carrier coupling module 13 is connected to the power line L, and the third end is formed as an access end of the uninterruptible power supply 3, which is used to connect to the uninterruptible power supply 3 when the power line L is not powered, and allow the uninterruptible power supply 3 to provide uninterruptible power supply to the power line L; and, when the power line is powered, couple the power line carrier communication signal to the power line L or decouple the power line carrier communication signal from the power line L. Among them, the power supply / carrier coupling module 13 includes an output filter 131, a carrier coupler 132 and a power supply / carrier integrated interface module 133; one end of the output filter 131 is connected to the other end of the OFDM modem 122, and the other end is connected to one end of the carrier coupler 132, for bandpass filtering the power line carrier communication signal; the other end of the carrier coupler 132 is connected to an input end of the power supply / carrier integrated interface module 133, for coupling the power line carrier communication signal to the power supply / carrier integrated interface module 133; or, decoupling the power line carrier communication signal from the power supply / carrier integrated interface module 133; the other input end of the power supply / carrier integrated interface module 133 is formed as an access end of the uninterruptible power supply 3, and the output end is connected to the power line L, for accessing the uninterruptible power supply 3 when the power line L is not energized, and allowing the uninterruptible power supply 3 to provide uninterruptible power supply to the power line L; and, when the power line L is energized, loading or receiving the power line carrier communication signal on the power line L. At this time, when the power line is connected to the power supply / carrier integrated interface module 13, it is a single-phase two-wire or three-phase three-wire power line.

[0048] In the embodiment of the present invention, Figure 3 As shown, the uninterruptible power supply 3 includes a bypass switch 31, a rectifier 32, a battery 33, an inverter 34 and a static switch 35; wherein,

[0049] The input end of the bypass switch 31 is connected to the mains, and the output end is connected to the input end of the rectifier 32 and the first input end of the static switch 35;

[0050] The output end of the rectifier 32 is connected to the positive electrode of the battery 33 and the first input end of the inverter 34;

[0051] The negative electrode of the battery 33 is connected to the second input terminal of the inverter 34;

[0052] The output terminal of the inverter 34 is connected to the second input terminal of the static switch 35;

[0053] The output end of the static switch 35 is connected to the power line L or the power supply / carrier integrated interface module 13, and includes two groups of reverse-parallel diode pairs.

[0054] At this time, during normal power consumption, the bypass switch 31 connects the AC power to the bypass diode pair of the rectifier 32 and the static switch 35. On the one hand, the static switch 35 directly outputs the AC power along the bypass. On the other hand, the AC power is converted into DC power through the rectifier 32 and connected to the battery 33 to charge the battery 33. When the battery 33 is fully charged, the bypass switch 31 closes the circuit connected to the rectifier 32 and directly connects the AC power to the bypass output of the static switch 35. During a power outage, the battery 33 connects the DC power to the inverter 34, and the inverter 34 converts the DC power to the AC power of the same amplitude and frequency as the input AC power. Then, the AC power is connected to the inverter diode pair of the static switch 35, and the AC power is output through the static switch 35, that is, the emergency power supply during a power outage is completed.

[0055] like Figure 4 As shown, an application scenario of a device for realizing signal conversion between optical communication and power communication in an embodiment of the present invention is further described as follows:

[0056] The network access equipment deployed in the basement includes an optical modem 2, an analog signal bus, a serial analog communication to power line communication unit 1, an uninterruptible power supply 3, and a power line L; the power line L connects the basement equipment and the ground equipment at the construction site, and has been deployed when the basement was built.

[0057] When controlling the Internet access device in the basement, the Internet access device sends information through the network cable. The signal in the network cable is transmitted to the near-end optical modem 2 through the basement communication device D1 and modulated into an optical signal, and then transmitted to the near-end serial analog communication to power line communication unit 1 through the analog signal bus laid in the basement. At this time, the near-end serial analog communication to power line communication unit 1 couples the received analog signal to the power line L, and after decoupling through the far-end serial analog communication to power line communication unit 1, it is modulated into an optical signal by the far-end optical modem 2 and enters the ground communication device D2 of the ground optical fiber network, and further sent to the ground Internet access device using the network cable. It should be noted that the power line L needs to pass through the uninterruptible power supply 3 before being connected to the city power.

[0058] It can be seen that each communication device in the basement communicates with the ground communication device through the power line L, and the signal can flow in both directions, so that different basements can communicate and control with the ground. Since there are many devices that need to be connected to the basement, the signal conversion device of the present invention can be separated and modularized, so that wiring and network connection can be performed more freely.

[0059] Corresponding to a signal conversion device for realizing optical communication and power communication in an embodiment of the present invention, an embodiment of the present invention also provides a network for realizing optical communication and power communication, including ground communication equipment, basement communication equipment and a signal conversion device for realizing optical communication and power communication in an embodiment of the present invention; wherein, the signal conversion device connects the ground communication equipment and the basement communication equipment together and realizes networked communication between the two. For the specific structure and connection relationship, please refer to the aforementioned content and will not be repeated here one by one.

[0060] Implementing the embodiments of the present invention has the following beneficial effects:

[0061] The signal conversion device in the present invention is arranged in a basement where power lines are laid, and can connect ground communication equipment with basement communication equipment, and complete the signal conversion between optical communication and power communication when the power lines are energized, so as to realize communication between ground communication equipment and basement communication equipment, thereby achieving the purpose of networking and communicating between the power lines for temporary power use in the basement and the ground optical fibers, greatly reducing the cost of laying signal lines.

[0062] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A signal conversion device for realizing optical communication and power communication, characterized in that: It is installed in a basement where power lines are laid, and includes two serial analog communication to power line communication units and two optical modems; The two serial port analog communication to power line communication units are respectively connected to two ends of the power line; The optical port of one of the two optical modems is connected to the ground optical fiber and connected to the ground communication equipment through the ground optical fiber, and the electrical port is connected to the end of a serial port analog communication to power line communication unit away from the power line; the optical port of the other of the two optical modems is connected to the pigtail and connected to the basement communication equipment through the pigtail, and the electrical port is connected to the end of another serial port analog communication to power line communication unit away from the power line; Among them, when the power line is energized, the ground communication equipment communicates with the basement communication equipment, and the optical modem of the initiator first modulates the optical signal into an analog electrical signal, and converts it into a power line carrier communication signal that can be carried on the power line through the corresponding serial port analog communication to power line communication unit, and then the serial port analog communication to power line communication unit of the receiver parses the power line carrier communication signal, and then enters the receiver's optical modem for demodulation; wherein, the initiator is the party that initiates communication between the ground communication equipment and the basement communication equipment; the receiver is the party that receives communication between the ground communication equipment and the basement communication equipment.

2. The signal conversion device for realizing optical communication and power communication according to claim 1, characterized in that: Each of the serial port analog communication to power line communication units comprises a serial port interface circuit, a G3-PLC module and a power supply / carrier coupling module; wherein, One end of the serial port interface circuit is connected to the electrical port of a corresponding optical modem, and the other end is connected to one end of the G3-PLC module, and is used to receive the first analog electrical signal output by the connected optical modem after modulating the optical signal; or forward the second analog electrical signal output by the connected G3-PLC module to the connected optical modem for demodulation; The other end of the G3-PLC module is connected to the first end of the power supply / carrier coupling module, and is used to convert the first analog electrical signal output by the connected serial port interface circuit into a first digital signal, and encode and modulate the first digital signal into a power line carrier communication signal that can be carried by the power line; or, reversely demodulate the power line carrier communication signal decoupled and forwarded by the connected power supply / carrier coupling module into a second digital signal, and reversely convert the second digital signal into a second analog electrical signal before sending it to the connected serial port interface circuit; The second end of the power supply / carrier coupling module is connected to the power line, and the third end is formed as an access end of an uninterruptible power supply, which is used to connect to the uninterruptible power supply when the power line is not powered, and allow the uninterruptible power supply to the power line uninterruptibly; and when the power line is powered, couple the power line carrier communication signal to the power line or decouple the power line carrier communication signal from the power line.

3. The signal conversion device for realizing optical communication and power communication according to claim 2, characterized in that: The G3-PLC module includes a signal converter and an OFDM modem; wherein, One end of the signal converter is connected to the serial port interface circuit, and the other end is connected to one end of the OFDM modem, for mutual conversion between analog and digital signals; The other end of the OFDM modem is connected to the power / carrier coupling module, and is used for mutual conversion between the power line carrier communication signal and the first digital signal and the second digital signal respectively; wherein the power line carrier communication signal is an analog signal of a certain bandwidth frequency that is obtained by encoding the first digital signal into a signal with Reed-3olomon encoding, and then processing it through inverse Fourier transform, adding cyclic prefix processing and adding window function.

4. The signal conversion device for realizing optical communication and power communication according to claim 3, characterized in that: The power / carrier coupling module includes an output filter, a carrier coupler and a power / carrier integrated interface module; wherein, One end of the output filter is connected to the other end of the OFDM modem, and the other end is connected to one end of the carrier coupler, for performing bandpass filtering on the power line carrier communication signal; The other end of the carrier coupler is connected to an input end of the power supply / carrier integrated interface module, and is used to couple the power line carrier communication signal to the power supply / carrier integrated interface module; or, decouple the power line carrier communication signal from the power supply / carrier integrated interface module; The other input end of the power supply / carrier integrated interface module is formed as an access end of an uninterruptible power supply, and the output end is connected to the power line, and is used to access the uninterruptible power supply when the power line is not powered, and allow the uninterruptible power supply to provide uninterruptible power to the power line; and when the power line is powered, load or receive the power line carrier communication signal on the power line.

5. The signal conversion device for realizing optical communication and power communication according to claim 4, characterized in that: When the power line is connected to the power supply / carrier integrated interface module, it is a single-phase two-wire or three-phase three-wire power line.

6. The signal conversion device for realizing optical communication and power communication according to claim 5, characterized in that: The uninterruptible power supply includes a bypass switch, a rectifier, a battery, an inverter and a static switch; wherein, The input end of the bypass switch is connected to the mains, and the output end is connected to the input end of the rectifier and the first input end of the static switch; The output end of the rectifier is connected to the positive electrode of the battery and the input end of the inverter; The negative electrode of the battery is connected to the second input terminal of the inverter; The output end of the inverter is connected to the second input end of the static switch; The output end of the static switch is connected to the power line or the power supply / carrier integrated interface module, and includes two groups of reverse-parallel diode pairs.

7. The signal conversion device for realizing optical communication and power communication according to claim 6, characterized in that: Each of the serial port analog communication to power line communication units is connected to the electrical port of the corresponding optical modem via a predetermined analog signal bus; wherein, The analog signal bus is one of an R3232 communication bus, an R3485 communication bus and an R3422 communication bus.

8. A network for realizing optical communication and power communication, characterized in that: It includes ground communication equipment, basement communication equipment and a signal conversion device for realizing optical communication and power communication as described in claim 7; wherein the signal conversion device connects the ground communication equipment and the basement communication equipment together and realizes network communication between the two.

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