A cross-voltage-domain power supply circuit and a circuit control method

Abstract

The application provides a cross-voltage domain power supply circuit and a circuit control method, and relates to the technical field of submarine communication. The cross-voltage domain power supply circuit comprises a control module, a main power supply module, a backup power supply module and a load function circuit module; a main supply state signal of the main power supply module and a backup supply state signal of the backup power supply module are collected by a main circuit detection submodule and a branch circuit detection submodule; the control circuit submodule receives and processes the main supply state signal and the backup supply state signal, generates a switch control signal, and controls the on-off state of the first bypass switch and the second bypass switch and the connection state of the switching switch according to the switch control signal. The cross-voltage domain power supply circuit provided by the application controls the state of the switch in the circuit according to the supply state signal by the control circuit submodule, so that the main power supply module and the backup power supply module can realize intelligent switching, the heat loss in the power supply circuit is reduced, the reliability of power supply is improved, the circuit structure is simple, and the space occupation is reduced.

Description

Technical Field

[0001] This application relates to the field of submarine communication technology, and in particular to a cross-voltage domain power supply circuit and circuit control method. Background Technology

[0002] Submarine optical cable systems are critical infrastructure for transoceanic communication, marine scientific research, and data transmission for energy platforms. The Branching Unit (BU), as one of the core underwater devices in a submarine optical cable system, connects three submarine cables in different directions, enabling flexible distribution and routing of communication signals to form the submarine network topology. BUs are typically connected in series to the submarine cable's constant current power supply system. The main trunk and secondary trunks form the trunk line, while the branches and the sea-to-ground branches form the tributaries. Due to differences in the power supply circuits, two independent voltage domains with a voltage difference exceeding kilovolts are formed between the trunk and tributaries. To meet the system's high reliability requirements, the BU needs to have the ability to flexibly switch between these two independent voltage domains. This allows for the isolation of the faulty section of the cable while maintaining normal communication on other lines; in other words, the load function circuitry within the BU needs to remain online in real time.

[0003] Currently, to achieve dual-voltage domain power supply switching and keep the load function circuit online in real time, a completely independent power supply unit and its matching load function circuit can be set up on both the main circuit side and the branch circuit side. Alternatively, a set of high-voltage relays (such as double-pole double-throw relays) can be used to switch the main circuit / branch circuit power supply, so that the load function circuit can be designed as a single unit and draw power from the main power supply unit (main circuit side), while the backup power supply unit (branch circuit side) remains in a powered-on hot backup state.

[0004] However, the first scheme uses two independent circuits, and the second scheme requires multiple sets of high-voltage relays, resulting in both schemes having a large space occupation problem. Furthermore, neither scheme can control the intelligent switching of the main / backup power supply unit; the backup power supply unit remains connected in series in the branch power supply circuit even in backup mode, continuously generating heat dissipation comparable to the main power supply unit, leading to excessive power consumption. Therefore, the above schemes cannot effectively solve the problems of unintelligent switching of the main / backup power supply unit, high heat dissipation, and large space occupation while ensuring real-time online operation of the load function circuit and reliable power supply across voltage domains. Summary of the Invention

[0005] This application provides a cross-voltage domain power supply circuit and circuit control method, which can solve the technical problems of high heat dissipation, large space occupation, and inability of main / backup power supply units to intelligently switch between the submarine optical cable branch units.

[0006] To achieve the above objectives, in a first aspect, this application provides a cross-voltage domain power supply circuit applied to a submarine optical cable branch unit. The cross-voltage domain power supply circuit includes: a control module, a main power supply module, a backup power supply module, and a load function circuit module. The control module includes a control circuit submodule, a trunk detection submodule, a branch detection submodule, a first bypass switch, a second bypass switch, and a switching switch. The trunk detection submodule is connected in series with the main power supply module and is used to collect a first power supply status signal from the main power supply module. The branch detection submodule is connected in series with the backup power supply module and is used to collect a second power supply status signal from the backup power supply module. The control circuit submodule is electrically connected to the trunk detection submodule, the branch detection submodule, the first bypass switch, the second bypass switch, and the switching switch, and is used to receive and process the first and second power supply status signals, generating an open / closed circuit. The system controls the switching signals, including the on / off states of the first and second bypass switches and the connection state of the switching switches. The connection state includes either the switching switch forming a connection loop with the main power supply module or with the backup power supply module. The first bypass switch is connected in parallel with the main power supply module to bypass the main power supply module when it is on. The second bypass switch is connected in parallel with the backup power supply module to bypass the backup power supply module when it is on. One end of the switching switch is connected to the main power supply module or the backup power supply module, and the other end is connected to the load function circuit module. This allows the main power supply module to transfer power to the load function circuit module, enabling it to operate in the first voltage domain, or the backup power supply module to transfer power to the load function circuit module, enabling it to operate in the second voltage domain.

[0007] The cross-voltage domain power supply circuit provided in this application uses a trunk detection submodule and a branch detection submodule to collect the power supply status signals of the main power supply module and the backup power supply module respectively and send them to the control circuit submodule. The control circuit submodule controls the state of each switch in the circuit according to the power supply status signals, so that intelligent switching can be realized between the main power supply module and the backup power supply module. When one of the main power supply module and the backup power supply module is working, the other is bypassed, reducing heat loss in the power supply circuit, improving the reliability of power supply, and there is only one load function circuit module in the circuit, which is simple in structure and reduces space occupation.

[0008] In one optional embodiment, the control circuit submodule includes: a first Zener diode, a first DC-DC converter, and a logic processing unit; the first Zener diode is connected to the input terminal of the first DC-DC converter, and the output terminal of the first DC-DC converter is connected to the logic processing unit; wherein, the first Zener diode is used to receive initial current from the submarine optical cable and to transmit the initial current to the first DC-DC converter; the first DC-DC converter is used to convert the initial current into a first drive current, and the first drive current is used to drive the logic processing unit, a first bypass switch, a second bypass switch, and a switching switch to operate; the logic processing unit is used to process the first power supply status signal and the second power supply status signal, generate a switch control signal to control the on / off state of the first bypass switch and the second bypass switch, and to control the connection state of the switching switch.

[0009] In the above embodiment, the first Zener diode can obtain current from the submarine optical cable, and the first DC-DC conversion unit converts the current obtained by the first Zener diode into a driving current for the normal operation of other devices in the control module (logic processing unit, first bypass switch, second bypass switch, and switching switch) to maintain the normal operation of the power supply circuit.

[0010] In one optional embodiment, the logic processing unit includes a microcontroller unit (MCU) chip; the MCU chip is used to process a first power supply status signal and a second power supply status signal; wherein the first power supply status signal and the second power supply status signal are digital signals.

[0011] In the above embodiments, conventional logic processing units can only process analog signals and cannot process digital signals. Therefore, when the first power supply status signal and the second power supply status signal are digital signals, a microcontroller unit (MCU) chip is required for processing to improve the adaptability of the control circuit submodule to different signals and improve the operational stability of the cross-voltage domain power supply circuit.

[0012] In one optional implementation, the main circuit detection submodule includes a first current sensor, and the branch circuit detection submodule includes a second current sensor; wherein, the first current sensor is used to detect a first current of the main power supply module, and the second current sensor is used to detect a second current of the backup power supply module; the main circuit detection submodule generates a first power supply status signal based on the first current, and sends the first power supply status signal to the control circuit submodule; the branch circuit detection submodule generates a second power supply status signal based on the second current, and sends the second power supply status signal to the control circuit submodule.

[0013] In the above embodiments, a first current sensor is set in the main circuit detection submodule and a second current sensor is set in the branch circuit detection submodule. These sensors are used to detect the current in the main power supply module and the backup power supply module and generate a first power supply status signal and a second power supply status signal. The first and second power supply status signals are then sent to the control circuit submodule, enabling the control circuit submodule to determine the real-time status of the main power supply module and the backup power supply module, thereby controlling the power supply mode of the cross-voltage domain power supply circuit.

[0014] In one optional embodiment, the main power supply module includes a second Zener diode and a second DC-DC converter; the backup power supply module includes a third Zener diode and a third DC-DC converter; wherein the second Zener diode is used to receive initial current from the submarine optical cable and to transmit the initial current to the second DC-DC converter; the second DC-DC converter is used to convert the initial current into a first functional current, which is used to drive the load functional circuit module to operate; the third Zener diode is used to receive initial current from the submarine optical cable and to transmit the initial current to the third DC-DC converter; the third DC-DC converter is used to convert the initial current into a second functional current, which is used to drive the load functional circuit module to operate.

[0015] In the above embodiments, Zener diodes are respectively provided in the main power supply module and the backup power supply module to convert the initial current received from the submarine optical cable into a functional current that can drive the load function circuit module to work, so as to ensure that the load function circuit module can work normally.

[0016] In one optional embodiment, the trunk detection submodule includes a first light-emitting device, and the branch detection submodule includes a second light-emitting device; wherein, the first light-emitting device is used to convert the first power supply status signal of the main power supply module into a first optical signal, and the second light-emitting device is used to convert the second power supply status signal of the backup power supply module into a second optical signal; the trunk detection submodule sends the first optical signal to the control circuit submodule, and the branch detection submodule sends the second optical signal to the control circuit submodule.

[0017] In the above embodiments, the trunk detection submodule and branch detection submodule in the cross-voltage domain power supply circuit can also use light-emitting devices to detect the power supply status of the main power supply module and the backup power supply module, and send the detected light signals to the control circuit submodule, so that the control circuit submodule can judge the real-time status of the main power supply module and the backup power supply module based on the light signals, thereby realizing the control of the power supply mode of the cross-voltage domain power supply circuit and improving the diversity of power supply status detection.

[0018] In one optional embodiment, the control circuit submodule includes a photosensitive device; the photosensitive device is used to convert a first optical signal and a second optical signal into a first electrical signal and a second electrical signal; the control circuit submodule processes the first electrical signal and the second electrical signal to generate a switch control signal.

[0019] In the above embodiments, when the signals sent from the trunk detection submodule and the branch detection submodule to the control circuit submodule are optical signals, the photosensitive device in the control circuit submodule can convert the optical signals into electrical signals, and process the electrical signals to generate switch control signals, which are used to control the state of each switch in the cross-voltage domain power supply circuit, thereby improving the adaptability of the control circuit submodule to different forms of signals.

[0020] In one optional implementation, the control circuit submodule further includes: a terminal station command receiving submodule; the terminal station command receiving submodule is used to receive control commands from the terminal station, and to generate switch control signals according to the control commands.

[0021] In the above embodiments, control commands can also be sent directly from the terminal station to the terminal station command receiving submodule. After receiving the control command, the control circuit submodule can directly control the state of each switch in the cross-voltage domain power supply circuit according to the control command, thereby improving the diversity of control methods.

[0022] In one optional embodiment, the switching switch includes a double-pole double-throw high-voltage relay; the double-pole double-throw high-voltage relay includes two first contacts and two second contacts; one end of the switching switch is connected to the main power supply module or to the backup power supply module, including: the two first contacts are respectively connected to the input terminal and the output terminal of the main power supply module, and the two second contacts are not connected, or the two second contacts are respectively connected to the input terminal and the output terminal of the backup power supply module, and the two first contacts are not connected.

[0023] In the above embodiments, due to the high voltage isolation between the main power supply module and the backup power supply module, a double-pole double-throw high-voltage relay is used as a switching switch to avoid voltage breakdown and other problems. This connection method enables switching between the main power supply module and the backup power supply module, while utilizing the characteristics of the double-pole double-throw high-voltage relay to improve the safety and reliability of power supply switching in environments with high voltage differences.

[0024] Secondly, this application also provides a circuit control method applied to any of the cross-voltage domain power supply circuits in the first aspect. The circuit control method includes: setting a trunk detection submodule on the trunk of the cross-voltage domain power supply circuit, and setting a branch detection submodule on a branch of the cross-voltage domain power supply circuit; setting a control circuit submodule on the trunk or branch; acquiring a first power supply status signal of the main power supply module through the trunk detection submodule, and acquiring a second power supply status signal of the backup power supply module through the branch detection submodule; wherein the main power supply module is set on the trunk, and the backup power supply module is set on the branch; receiving and processing the first power supply status signal and the second power supply status signal through the control circuit submodule, generating a switch control signal, and controlling a first bypass switch and a branch switch according to the switch control signal. The on / off state of the second bypass switch and the connection state of the switching switch include the switching switch forming a connection loop with the main power supply module or the switching switch forming a connection loop with the backup power supply module; wherein, the first bypass switch is connected in parallel with the main power supply module to bypass the main power supply module when it is on; the second bypass switch is connected in parallel with the backup power supply module to bypass the backup power supply module when it is on; one end of the switching switch is connected to the main power supply module or the backup power supply module, and the other end of the switching switch is connected to the load function circuit module, which is used to transfer the power of the main power supply module to the load function circuit module so that the load function circuit module operates in the first voltage domain, or transfer the power of the backup power supply module to the load function circuit module so that the load function circuit module operates in the second voltage domain.

[0025] It is understandable that the beneficial effects of the technical solution of the second aspect provided above can be referred to the beneficial effects of the first aspect and any of its optional implementation methods, and will not be repeated here. Attached Figure Description

[0026] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the internal circuit of a branch unit;

[0028] Figure 2 This is a schematic diagram of the internal circuit of another branch unit;

[0029] Figure 3 A schematic diagram of a cross-voltage domain power supply circuit provided in an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the internal structure of a control circuit submodule provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of another cross-voltage domain power supply circuit provided in an embodiment of this application;

[0032] Figure 6 A schematic diagram of another cross-voltage domain power supply circuit provided in the embodiments of this application;

[0033] Figure 7 A circuit connection diagram provided for an embodiment of this application, wherein the power supply is provided by a main power supply module;

[0034] Figure 8 A circuit connection diagram provided for an embodiment of this application, wherein the power supply is provided by a backup power supply module;

[0035] Figure 9 This is a schematic diagram of a circuit control method provided in an embodiment of this application.

[0036] Illustration:

[0037] 101 - First main power supply unit; 102 - First backup power supply unit; 103 - First load function circuit unit; 104 - Second load function circuit unit;

[0038] 201-Second main power supply unit; 202-Second backup power supply unit; 203-First switch; 204-Second switch; 205-Third load function circuit unit;

[0039] 3011 - Control circuit submodule; 3012 - Main circuit detection submodule; 3013 - Branch circuit detection submodule; 3014 - First bypass switch; 3015 - Second bypass switch; 3016 - Changeover switch; 302 - Main power supply module; 3021 - Second Zener diode; 3022 - Second DC-DC converter unit; 3031 - Third Zener diode; 3032 - Third DC-DC converter unit; 303 - Backup power supply module; 304 - Load function circuit module;

[0040] 401 - First Zener diode; 402 - First DC-DC converter; 403 - Logic processing unit;

[0041] 501 - First light-emitting device; 502 - Second light-emitting device;

[0042] 601 - Terminal Command Receiving Submodule. Detailed Implementation

[0043] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following examples do not represent all embodiments consistent with this application.

[0044] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0045] The terms "first," "second," "third," etc., used in the specification and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms can be used interchangeably where appropriate.

[0046] To facilitate understanding of the plan, the following explanations are provided for relevant terms:

[0047] Branching Unit (BU): A branching unit is one of the underwater devices in a submarine cable system. The BU connects three submarine cables to enable communication between related stations. It consists of three branch legs in different directions: the main trunk, the secondary trunk, and the branch. The main trunk and the secondary trunk form the trunk power supply, while the branch and the submarine ground wire form the branch power supply. A significant voltage difference exists between the trunk power supply and the branch power supply, creating two voltage domains with a certain voltage difference based on the differences in the power supply circuits.

[0048] Voltage domain: A voltage domain refers to a region in a circuit that has a specific voltage range. In the cross-voltage domain power supply circuit of this application, there are a first voltage domain and a second voltage domain, which correspond to the voltage ranges when the main power supply module and the backup power supply module supply power to the load function circuit module, respectively.

[0049] DC-DC converter: A DC-DC converter is a circuit module that converts an input DC voltage into a specific output DC voltage. The output voltage and current can be adjusted according to the needs of different modules to ensure stable operation of each module under suitable power supply conditions.

[0050] Load function circuit module: The load function circuit module is the final power-consuming part of the cross-voltage domain power supply circuit, and its operation depends on the power provided by the main power supply module or the backup power supply module. This module can operate normally in the first voltage domain or the second voltage domain to achieve the corresponding functions, depending on different application scenarios and requirements.

[0051] In submarine optical cable systems, branching units (BUs) connect three cables in different directions, enabling flexible distribution and routing of communication signals to form the submarine network topology. In some embodiments, the BU is connected in series to the constant current power supply system of the submarine cable. Zener diodes are used to obtain power from the constant current submarine optical cable system to supply the downstream load circuitry. The main trunk and secondary trunks of the BU form the trunk line, while the branches and the sea-to-ground lines form the branch lines. Due to differences in the power supply circuits, two independent voltage domains with a voltage difference exceeding 1000 volts are formed between the trunk line and the branch lines. To improve the reliability of the submarine optical cable system, and to isolate the faulty section while maintaining normal communication on other lines in the event of a cable failure, the BU needs to have the ability to flexibly switch between the two independent voltage domains; that is, the load circuitry within the BU needs to remain online in real time. Therefore, both the trunk power supply section and the branch power supply section of the BU should have stable power supply units.

[0052] In some embodiments, to ensure that both the main power supply section and the branch power supply section of the BU have stable power supply units, a set of power supply unit circuits and load function circuits are designed for the main power supply section and the branch power supply section respectively, so that the main power supply section and the branch power supply section can work independently.

[0053] Figure 1 This is a schematic diagram of the internal circuit of a branch unit.

[0054] like Figure 1 As shown, the trunk power supply section of the branch unit's internal circuit includes a first main power supply unit 101 and a first load function circuit unit 103; the branch power supply section includes a first backup power supply unit 102 and a second load function circuit unit 104. It is evident that the trunk power supply section and the branch power supply section are two independent circuits that do not interfere with each other. Because each of the trunk and branch power supply sections has a set of load function circuit units, the branch unit is large in size and occupies a large amount of space. Furthermore, when the internal circuit of the branch unit is working, both the first load function circuit unit 103 and the second load function circuit unit 104 operate at full power consumption, resulting in excessive total power consumption and excessively high internal circuit temperature.

[0055] In other embodiments, to avoid the additional losses caused by two sets of load function circuit units, only one set of load function circuit unit can be set in the internal circuit of the branch unit. The power supply section still includes the main power supply section and the branch power supply section, and a set of double-pole double-throw high-voltage relays is used to realize the switching between the main power supply and the branch power supply.

[0056] Figure 2 This is a schematic diagram of the internal circuit of another branch unit.

[0057] like Figure 2As shown, the internal circuit of the branch unit includes a second main power supply unit 201, a second backup power supply unit 202, a first switch 203, a second switch 204, and a third load function circuit unit 205. The first switch 203 and the second switch 204 are high-voltage relays. When the first switch 203 is on and the second switch 204 is off, the third load function circuit unit 205 obtains power from the second main power supply unit 201; when the second switch 204 is on and the first switch 203 is off, the third load function circuit unit 205 obtains power from the second backup power supply unit 202.

[0058] However, the internal circuitry of the aforementioned branch units requires multiple high-voltage relays to switch between main and branch power supply, resulting in a large space occupation. Furthermore, it cannot control the intelligent switching between the main and backup power supply units; the backup power supply unit remains connected in series in the branch power supply circuit even in backup mode, continuously generating heat dissipation comparable to that of the main power supply unit, leading to excessive power consumption and excessively high internal circuit temperature.

[0059] To address the aforementioned issues, this application provides a cross-voltage domain power supply circuit. A main circuit detection submodule 3012 and a branch circuit detection submodule 3013 are connected in series in the branches containing the main power supply module 302 and the backup power supply module 303, respectively. A bypass switch is connected in parallel to each of the main power supply module 302 and the backup power supply module 303. A switching switch 3016 is provided at the input terminal of the load function circuit module 304. The main circuit detection submodule 3012 and the branch circuit detection submodule 3013 detect the power supply status signals of the main power supply module 302 and the backup power supply module 303. The control circuit submodule 3011 processes the power supply status signals to obtain switch control signals. These signals control the on / off states of the two bypass switches and the switching state of the switching switch 3016, thereby achieving voltage domain switching for the load function circuit module 304 and bypassing non-power supply modules. This achieves intelligent voltage domain switching and energy saving.

[0060] Figure 3 This is a schematic diagram of a cross-voltage domain power supply circuit provided in an embodiment of this application.

[0061] like Figure 3As shown, the cross-voltage domain power supply circuit includes: a control module, a main power supply module 302, a backup power supply module 303, and a load function circuit module 304; the control module includes a control circuit submodule 3011, a main circuit detection submodule 3012, a branch circuit detection submodule 3013, a first bypass switch 3014, a second bypass switch 3015, and a switching switch 3016; wherein, the main circuit detection submodule 3012 is connected in series with the main power supply module 302 and is used to collect the first power supply status signal of the main power supply module 302; the branch circuit detection submodule 3013 is connected in series with the backup power supply module 303 and is used to collect the second power supply status signal of the backup power supply module 303; the control circuit submodule 3011 is electrically connected to the main circuit detection submodule 3012, the branch circuit detection submodule 3013, the first bypass switch 3014, the second bypass switch 3015, and the switching switch 3016, and is used to receive and process the first power supply status signal and the second power supply status signal, generate a switch control signal, and control the first bypass switch 3014 and the second bypass switch 3015 according to the switch control signal. The on / off states of bypass switch 3014 and second bypass switch 3015, and the connection state of switch 3016, including switch 3016 forming a connection circuit with main power supply module 302 or switch 3016 forming a connection circuit with backup power supply module 303; first bypass switch 3014 is connected in parallel with main power supply module 302 to bypass main power supply module 302 when it is on; second bypass switch 3015 is connected in parallel with backup power supply module 303 to bypass backup power supply module 303 when it is on. The power supply module 303 is bypassed; one end of the switching switch 3016 is connected to the main power supply module 302 or the backup power supply module 303, and the other end of the switching switch 3016 is connected to the load function circuit module 304, which is used to transfer the power of the main power supply module 302 to the load function circuit module 304 so that the load function circuit module 304 can work in the first voltage domain, or transfer the power of the backup power supply module 303 to the load function circuit module 304 so that the load function circuit module 304 can work in the second voltage domain.

[0062] It should be noted that since the control circuit submodule 3011 is connected to the main circuit detection submodule 3012, the branch circuit detection submodule 3013, the first bypass switch 3014, the second bypass switch 3015 and the switching switch 3016 via electrical connection, its connection position in the cross-voltage domain power supply circuit does not affect its control function on the circuit. Therefore, the control circuit submodule 3011 can be connected in series in the circuit of the main power supply module 302 or in the circuit of the backup power supply module 303. This application embodiment does not impose specific limitations.

[0063] In some embodiments, in order to maintain the normal operation of the cross-voltage domain power supply circuit, the control circuit submodule 3011 shall include: a first Zener diode 401, a first DC-DC conversion unit 402, and a logic processing unit 403.

[0064] Figure 4 This is a schematic diagram of the internal structure of a control circuit submodule provided in an embodiment of this application.

[0065] like Figure 4 As shown, the first Zener diode 401 is connected to the input terminal of the first DC-DC converter 402, and the output terminal of the first DC-DC converter 402 is connected to the logic processing unit 403.

[0066] In one implementation, when the cross-voltage domain power supply circuit starts operating, the first Zener diode 401 first receives initial current from the submarine optical cable and transmits it to the first DC-DC converter 402. The first DC-DC converter 402 converts the initial current into a first drive current, which drives the logic processing unit 403, the first bypass switch 3014, the second bypass switch 3015, and the switching switch 3016. The logic processing unit 403 processes the first and second power supply status signals to generate switch control signals, which control the on / off states of the first and second bypass switches 3014 and 3015, and the connection state of the switching switch 3016.

[0067] In some embodiments, to enable the control circuit submodule 3011 to determine the real-time status of the main power supply module 302 and the backup power supply module 303, the main circuit detection submodule 3012 and the branch circuit detection submodule 3013 need to detect the current values ​​in the main power supply module 302 and the backup power supply module 303, and generate a power supply status signal based on the current values, which is then sent to the control circuit submodule 3011. Therefore, the main circuit detection submodule 3012 should include a first current sensor, and the branch circuit detection submodule 3013 should include a second current sensor. The first current sensor is used to detect the first current of the main power supply module 302, and the second current sensor is used to detect the second current of the backup power supply module 303.

[0068] In one implementation, after detecting a first current, the main circuit detection submodule 3012 generates a first power supply status signal and sends it to the control circuit submodule 3011. After detecting a second current, the branch circuit detection submodule 3013 generates a second power supply status signal and sends it to the control circuit submodule 3011.

[0069] For example, when the main power supply module 302 is supplying power normally, the first current sensor detects a stable first current in the main power supply module 302. The main circuit detection submodule 3012 generates a first power supply status signal indicating that the main power supply module 302 is supplying power normally based on the first current and sends it to the control circuit submodule 3011. Meanwhile, the backup power supply module 303 is in standby mode. The second current sensor detects that the second current in the backup power supply module 303 is small or close to zero. The branch circuit detection submodule 3013 generates a second power supply status signal indicating that the backup power supply module 303 is in standby mode based on the second current and sends it to the control circuit submodule 3011. After receiving the first power supply status signal and the second power supply status signal, the logic processing unit 403 analyzes and processes the first power supply status signal and the second power supply status signal to obtain the switch control signal used to control the main power supply module 302 to supply power to the load function circuit module 304: controlling the first bypass switch 3014 to open, controlling the second bypass switch 3015 to open, and controlling the switching switch 3016 to form a connection loop with the main power supply module 302, ensuring that the main power supply module 302 is connected to the circuit, and bypassing the backup power supply module 303, so that the load function circuit module 304 can operate normally under the first voltage domain.

[0070] For another example, when the main power supply module 302 fails, the first current sensor detects a decrease in the first current of the main power supply module 302, or a current close to zero. The main circuit detection submodule 3012 generates a first power supply status signal indicating a failure of the main power supply module 302 and sends it to the control circuit submodule 3011. Meanwhile, the backup power supply module 303 can supply power normally. The second current sensor detects a stable second current in the backup power supply module 303. The branch circuit detection submodule 3013 generates a second power supply status signal indicating that the backup power supply module 303 is supplying power normally based on the second current and sends it to the control circuit submodule 3011. After receiving the first power supply status signal and the second power supply status signal, the logic processing unit 403 analyzes and processes the first power supply status signal and the second power supply status signal to obtain the switch control signal used to control the backup power supply module 303 to supply power to the load function circuit module 304: control the first bypass switch 3014 to be turned on, control the second bypass switch 3015 to be turned off, control the switching switch 3016 to form a connection loop with the backup power supply module 303, ensure that the backup power supply module 303 is connected to the circuit, and bypass the main power supply module 302, so that the load function circuit module 304 is switched to the second voltage domain for normal operation.

[0071] In some embodiments, when the power supply status signals sent to the control circuit submodule 3011 by the trunk detection submodule 3012 and the branch detection submodule 3013 are digital signals, the conventional logic processing unit 403 cannot directly process the digital signals. Therefore, to improve the processing capability of the logic processing unit 403 for different signals, the logic processing unit 403 also includes a microcontroller unit (MCU) chip. The MCU chip is used to process the first power supply status signal and the second power supply status signal, which are digital signals.

[0072] For example, if the main power supply module 302 meets the power supply requirement, the output current of the main power supply module 302 is greater than a first preset value and less than a second preset value, for example, the first preset value is 5A and the second preset value is 10A. After the main circuit detection submodule 3012 collects the first power supply status signal of the main power supply module 302, the microcontroller unit (MCU) chip performs calculations. The calculation result shows that the current of the main power supply module 302 meets the condition of being greater than the first preset value and less than the second preset value. The control circuit submodule 3011 then determines that the main power supply module 302 meets the power supply requirement. At this time, the switch control signal generated by the control circuit submodule 3011 controls the first bypass switch 3014 to open, controls the second bypass switch 3015 to open, and controls the switching switch 3016 to form a connection loop with the main power supply module 302, ensuring that the main power supply module 302 is connected to the circuit, and bypassing the backup power supply module 303, so that the load function circuit module 304 operates normally under the first voltage domain.

[0073] For another example, if the main power supply module 302 meets the power supply requirement, the output current of the main power supply module 302 is greater than a first preset value and less than a second preset value, for example, the first preset value is 5A and the second preset value is 10A. When the main circuit detection submodule 3012 collects the first power supply status signal of the main power supply module 302, the microcontroller unit (MCU) chip performs calculations. The calculation result shows that the current of the main power supply module 302 does not meet the condition of being greater than the first preset value and less than the second preset value. Therefore, the control circuit submodule 3011 determines that the main power supply module 302 does not meet the power supply requirement. At this time, the switch control signal generated by the control circuit submodule 3011 controls the first bypass switch 3014 to be turned on, controls the second bypass switch 3015 to be turned off, and controls the switching switch 3016 to form a connection loop with the backup power supply module 303, ensuring that the backup power supply module 303 is connected to the circuit and bypassing the main power supply module 302, so that the load function circuit module 304 can operate normally in the second voltage domain.

[0074] In some embodiments, to ensure that the load function circuit module 304 can receive electrical energy from the main power supply module 302 or the backup power supply module 303 and that the load function circuit module 304 can work normally, the main power supply module 302 and the backup power supply module 303 should include a Zener diode for obtaining the initial current and a DC-DC converter for converting the current.

[0075] In one implementation, such as Figure 3 As shown, the main power supply module 302 includes a second Zener diode 3021 and a second DC-DC converter 3022; the backup power supply module 303 includes a third Zener diode 3031 and a third DC-DC converter 3032.

[0076] Specifically, in the main power supply module 302, the second Zener diode 3021 first receives the initial current from the submarine optical cable and transmits the initial current to the second DC-DC converter 3022. After receiving the initial current, the second DC-DC converter 3022 converts the initial current into a first functional current, which drives the load function circuit module 304 to work.

[0077] Similarly, in the backup power supply module 303, the third Zener diode 3031 first receives the initial current from the submarine optical cable and transmits the initial current to the third DC-DC converter 3032. After receiving the initial current, the third DC-DC converter 3032 converts the initial current into a second functional current, which drives the load function circuit module 304 to work.

[0078] In some embodiments, to enhance the diversity of power supply circuits across voltage domains, the main circuit detection submodule 3012 and the branch circuit detection submodule 3013 can also detect the power supply status of the main power supply module 302 and the backup power supply module 303 through light-emitting devices.

[0079] Figure 5 This is a schematic diagram of another cross-voltage domain power supply circuit provided in an embodiment of this application.

[0080] like Figure 5 As shown, in the cross-voltage domain power supply circuit, the main circuit detection submodule 3012 includes a first light-emitting device 501, and the branch circuit detection submodule 3013 includes a second light-emitting device 502.

[0081] In one implementation, after the first light-emitting device 501 converts the first power supply status signal of the main power supply module 302 into a first optical signal, the trunk detection submodule 3012 sends the first optical signal to the control circuit submodule 3011; after the second light-emitting device 502 converts the second power supply status signal of the backup power supply module 303 into a second optical signal, the branch detection submodule 3013 sends the second optical signal to the control circuit submodule 3011.

[0082] Furthermore, to process the first and second optical signals, the control circuit submodule 3011 also includes a photosensitive device. After receiving the first and second optical signals, the photosensitive device converts the first and second optical signals into a first and a second electrical signal. The logic processing unit 403 in the control circuit submodule 3011 then processes the first and second electrical signals to generate a switch control signal.

[0083] For example, when the main power supply module 302 is supplying power normally, the first light-emitting device 501 emits stable light, and the trunk detection submodule 3012 sends the corresponding first light signal to the control circuit submodule 3011. Meanwhile, when the backup power supply module 303 is in standby mode, the second light-emitting device 502 emits weak light or does not emit light at all, and the branch detection submodule 3013 sends the corresponding second light signal to the control circuit submodule 3011. After receiving the first optical signal and the second optical signal, the control circuit submodule 3011 converts the first optical signal and the second optical signal into a first electrical signal and a second electrical signal by a photosensitive device. The processing chip (e.g., MCU chip) in the logic processing unit 403 analyzes and processes the first electrical signal and the second electrical signal to obtain a switch control signal for controlling the main power supply module 302 to supply power to the load function circuit module 304: controlling the first bypass switch 3014 to open, controlling the second bypass switch 3015 to open, and controlling the switching switch 3016 to form a connection loop with the main power supply module 302, ensuring that the main power supply module 302 is connected to the circuit, and bypassing the backup power supply module 303, so that the load function circuit module 304 can operate normally under the first voltage domain.

[0084] For another example, when the main power supply module 302 fails, the light emission state of the first light-emitting device 501 will change, such as becoming weaker or turning off. The corresponding first optical signal from the trunk detection submodule 3012 is sent to the control circuit submodule 3011. Meanwhile, the backup power supply module 303 can supply power normally, and the second light-emitting device 502 emits stable light. The branch detection submodule 3013 sends the corresponding second optical signal to the control circuit submodule 3011. After receiving the first optical signal and the second optical signal, the control circuit submodule 3011 converts the first optical signal and the second optical signal into a first electrical signal and the second electrical signal by a photosensitive device. The processing chip (e.g., MCU chip) in the logic processing unit 403 analyzes and processes the first electrical signal and the second electrical signal to obtain a switch control signal for controlling the backup power supply module 303 to supply power to the load function circuit module 304: controlling the first bypass switch 3014 to be turned on, controlling the second bypass switch 3015 to be turned off, and controlling the switching switch 3016 to form a connection loop with the backup power supply module 303, ensuring that the backup power supply module 303 is connected to the circuit, and bypassing the main power supply module 302, so that the load function circuit module 304 can operate normally in the second voltage domain.

[0085] In some embodiments, to enhance the diversity of control methods for cross-voltage domain power supply circuits, in addition to using the trunk detection submodule 3012 and branch detection submodule 3013 to detect the power supply status of the main power supply module 302 and the backup power supply module 303, and having the voltage domain switching achieved after processing by the control circuit submodule 3011, the terminal station can also directly send control commands to the control circuit submodule 3011. The control circuit submodule 3011 processes the control commands sent by the terminal station and generates a switch control signal.

[0086] Figure 6 This is a schematic diagram of another cross-voltage domain power supply circuit provided in an embodiment of this application.

[0087] like Figure 6 As shown, the control circuit submodule 3011 also includes: a terminal station command receiving submodule 601.

[0088] In one implementation, the terminal command receiving submodule 601 receives the control command issued by the terminal and sends the control command to the logic processing unit 403 in the control circuit submodule 3011. The logic processing unit 403 generates a switch control signal according to the control command.

[0089] It should be understood that the switch control signal is the same as the switch control signal in the aforementioned embodiments, and the power supply state is also the same, so it will not be described again here.

[0090] In some embodiments, since the voltage domains of the main power supply module 302 and the backup power supply module 303 have high voltage isolation, a double-pole double-throw high-voltage relay can be used as the switching switch 3016 to avoid voltage breakdown and other problems during the switching of power supply voltage domains, thereby improving the safety and reliability of power supply voltage domain switching in environments with high voltage differences. The double-pole double-throw high-voltage relay includes two first contacts (NO contacts, i.e., normally open contacts) and two second contacts (NC contacts, i.e., normally closed contacts).

[0091] In one implementation, when the main power supply module 302 supplies power to the load function circuit module 304, the two first contacts (NO contacts) are connected to the input and output terminals of the main power supply module 302 respectively, and the two second contacts (NC contacts) are not connected.

[0092] In another implementation, when the backup power supply module 303 supplies power to the load function circuit module 304, the two first contacts (NO contacts) are not connected, and the two second contacts (NC contacts) are connected to the input and output terminals of the backup power supply module 303, respectively.

[0093] Below, we will introduce four different states of a cross-voltage domain power supply circuit.

[0094] In one implementation, the cross-voltage domain power supply circuit can be in a default state, that is, the circuit connection state is as follows when no power is supplied: Figure 3 As shown. At this time, both the first bypass switch 3014 and the second bypass switch 3015 are open, the switching switch 3016 is connected to the two second contacts (NC contacts), and the load function circuit module 304 has no power supply.

[0095] In another implementation, the cross-voltage domain power supply circuit can operate under the power supply of the main power supply module 302. When the cross-voltage domain power supply circuit is powered on, it enters the operating state. The main circuit detection submodule 3012 detects the main power supply module 302, obtains its first power supply status signal, and sends it to the control circuit submodule 3011. The branch circuit detection submodule 3013 detects the backup power supply module 303, obtains its second power supply status signal, and sends it to the control circuit submodule 3011. Upon receiving the first and second power supply status signals, the control circuit submodule 3011 processes them using the logic processing unit 403 to obtain the processing result.

[0096] It should be noted that the processing results obtained by the logic processing unit 403 include: the main power supply module 302 meets the power supply requirements, or the main power supply module 302 does not meet the power supply requirements.

[0097] It should be understood that when the main power supply module 302 meets the power supply requirements, the main power supply module 302 supplies power to the load function circuit module 304; when the main power supply module 302 does not meet the power supply requirements, the power supply is switched to the backup power supply module 303 to supply power to the load function circuit module 304.

[0098] Figure 7 This is a schematic diagram of a circuit connection provided by a main power supply module for an embodiment of this application.

[0099] like Figure 7 As shown, when the processing result shows that the main power supply module 302 meets the power supply requirements, the control circuit submodule 3011 generates a switching control signal to control the main power supply module 302 to supply power to the load function circuit module 304: controlling the first bypass switch 3014 to open, controlling the second bypass switch 3015 to open, and controlling the switching switch 3016 to connect to two normally open contacts (NO contacts). At this time, the load function circuit module 304 operates in the first voltage domain, while the backup power supply module 303 is bypassed. The current will no longer flow through the Zener diode of the backup power supply module 303, and the backup power supply module 303 achieves cold backup with no power loss.

[0100] Figure 8 This is a schematic diagram of a circuit connection provided by a backup power supply module for an embodiment of this application.

[0101] like Figure 8 As shown, when the processing result indicates that the main power supply module 302 meets the no-power-supply requirement (possibly due to a fault in the main power supply module 302), the control circuit submodule 3011 generates a switching control signal to control the backup power supply module 303 to supply power to the load function circuit module 304: controlling the first bypass switch 3014 to turn on, controlling the second bypass switch 3015 to turn off, and controlling the switching switch 3016 to connect to two normally closed contacts (NC contacts). At this time, the load function circuit module 304 operates in the second voltage domain, and the current no longer flows through the main power supply module 302, thereby enabling the backup power supply module 303 to supply power.

[0102] In another implementation, when the cross-voltage domain power supply circuit has no power supply, the characteristics of the double-pole double-throw high-voltage relay contacts can be utilized to return to the default state, i.e., the changeover switch 3016 is connected to the two second contacts (NC contacts). At this time, the cross-voltage domain power supply circuit is disabled, and the circuit connection state is as follows. Figure 3 As shown.

[0103] In some embodiments, this application also provides a circuit control method applied to a power supply circuit spanning voltage domains.

[0104] Figure 9 This is a schematic diagram of a circuit control method provided in an embodiment of this application.

[0105] like Figure 9 As shown, the circuit control method includes steps S100-S400.

[0106] Step S100: Set up a trunk detection submodule on the trunk of the cross-voltage domain power supply circuit, and set up a branch detection submodule on the branch of the cross-voltage domain power supply circuit.

[0107] Step S200: Install a control circuit submodule on the main line or branch line.

[0108] Step S300: Collect the first power supply status signal of the main power supply module through the trunk detection submodule, and collect the second power supply status signal of the backup power supply module through the branch detection submodule.

[0109] The main power supply module is located on the main line, and the backup power supply module is located on the branch line.

[0110] Step S400: Receive and process the first power supply status signal and the second power supply status signal through the control circuit submodule, generate a switch control signal, and control the on / off state of the first bypass switch and the second bypass switch, and the connection state of the switching switch according to the switch control signal. The connection state includes the switching switch forming a connection loop with the main power supply module, or the switching switch forming a connection loop with the backup power supply module.

[0111] The first bypass switch is connected in parallel with the main power supply module and is used to bypass the main power supply module when it is turned on; the second bypass switch is connected in parallel with the backup power supply module and is used to bypass the backup power supply module when it is turned on; one end of the switching switch is connected to the main power supply module or the backup power supply module, and the other end of the switching switch is connected to the load function circuit module, which is used to transfer the power of the main power supply module to the load function circuit module so that the load function circuit module can operate in the first voltage domain, or transfer the power of the backup power supply module to the load function circuit module so that the load function circuit module can operate in the second voltage domain.

[0112] The cross-voltage domain power supply circuit and circuit control method provided in the above embodiments use a trunk detection submodule and a branch detection submodule to collect the power supply status signals of the main power supply module and the backup power supply module respectively and send them to the control circuit submodule. The control circuit submodule controls the state of each switch in the circuit according to the power supply status signals, so that intelligent switching can be realized between the main power supply module and the backup power supply module. When one of the main power supply module and the backup power supply module is working, the other is cold bypassed, reducing heat loss in the power supply circuit and improving the reliability of power supply. In addition, there is only one load function circuit module in the circuit, which is simple in structure and reduces space occupation.

[0113] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A cross-voltage domain power supply circuit, applied to a submarine optical cable branch unit, characterized in that, include: Control module, main power supply module, backup power supply module and load function circuit module; The control module includes a control circuit submodule, a main circuit detection submodule, a branch circuit detection submodule, a first bypass switch, a second bypass switch, and a switching switch; The trunk detection submodule is connected in series with the main power supply module and is used to collect the first power supply status signal of the main power supply module; the branch detection submodule is connected in series with the backup power supply module and is used to collect the second power supply status signal of the backup power supply module. The control circuit submodule is electrically connected to the main circuit detection submodule, the branch circuit detection submodule, the first bypass switch, the second bypass switch, and the switching switch. It is used to receive and process the first power supply status signal and the second power supply status signal, generate a switch control signal, and control the on / off state of the first bypass switch and the second bypass switch, and the connection state of the switching switch according to the switch control signal. The connection state includes the switching switch forming a connection loop with the main power supply module, or the switching switch forming a connection loop with the backup power supply module. The first bypass switch is connected in parallel with the main power supply module and is used to bypass the main power supply module when it is turned on; the second bypass switch is connected in parallel with the backup power supply module and is used to bypass the backup power supply module when it is turned on. One end of the switching switch is connected to the main power supply module or the backup power supply module, and the other end of the switching switch is connected to the load function circuit module. The switching switch is used to transfer the power of the main power supply module to the load function circuit module so that the load function circuit module can operate in the first voltage domain, or to transfer the power of the backup power supply module to the load function circuit module so that the load function circuit module can operate in the second voltage domain.

2. The cross-voltage domain power supply circuit according to claim 1, characterized in that, The control circuit submodule includes: The first Zener diode, the first DC-DC converter, and the logic processing unit; The first Zener diode is connected to the input terminal of the first DC-DC converter, and the output terminal of the first DC-DC converter is connected to the logic processing unit. The first Zener diode is used to receive initial current from the submarine optical cable and to transmit the initial current to the first DC-DC converter unit. The first DC-DC conversion unit is used to convert the initial current into a first drive current, and the first drive current is used to drive the logic processing unit, the first bypass switch, the second bypass switch and the switching switch to work; The logic processing unit is used to process the first power supply status signal and the second power supply status signal, generate the switch control signal, and control the on / off state of the first bypass switch and the second bypass switch, as well as control the connection state of the switching switch.

3. The cross-voltage domain power supply circuit according to claim 2, characterized in that, The logic processing unit includes a microcontroller unit (MCU) chip; The microcontroller unit (MCU) chip is used to process the first power supply status signal and the second power supply status signal; wherein the first power supply status signal and the second power supply status signal are digital signals.

4. The cross-voltage domain power supply circuit according to claim 1, characterized in that, The main circuit detection submodule includes a first current sensor, and the branch circuit detection submodule includes a second current sensor. Wherein, the first current sensor is used to detect the first current of the main power supply module, and the second current sensor is used to detect the second current of the backup power supply module; The trunk detection submodule generates the first power supply status signal based on the first current and sends the first power supply status signal to the control circuit submodule. The branch detection submodule generates the second power supply status signal based on the second current and sends the second power supply status signal to the control circuit submodule.

5. The cross-voltage domain power supply circuit according to claim 1, characterized in that, The main power supply module includes a second Zener diode and a second DC-DC converter; the backup power supply module includes a third Zener diode and a third DC-DC converter. The second Zener diode is used to receive initial current from the submarine optical cable and to transmit the initial current to the second DC-DC converter unit. The second DC-DC conversion unit is used to convert the initial current into a first functional current, which is used to drive the load functional circuit module to work. The third Zener diode is used to receive initial current from the submarine optical cable and to transmit the initial current to the third DC-DC converter unit; The third DC-DC conversion unit is used to convert the initial current into a second functional current, which is used to drive the load function circuit module to work.

6. The cross-voltage domain power supply circuit according to claim 1, characterized in that, The trunk detection submodule includes a first light-emitting device, and the branch detection submodule includes a second light-emitting device; Wherein, the first light-emitting device is used to convert the first power supply status signal of the main power supply module into a first optical signal, and the second light-emitting device is used to convert the second power supply status signal of the backup power supply module into a second optical signal; The trunk detection submodule sends the first optical signal to the control circuit submodule, and the branch detection submodule sends the second optical signal to the control circuit submodule.

7. The cross-voltage domain power supply circuit according to claim 6, characterized in that, The control circuit submodule includes a photosensitive device; The photosensitive device is used to convert the first optical signal and the second optical signal into a first electrical signal and a second electrical signal. The control circuit submodule processes the first electrical signal and the second electrical signal to generate the switch control signal.

8. The cross-voltage domain power supply circuit according to claim 1, characterized in that, The control circuit submodule also includes: a terminal station command receiving submodule; The terminal station command receiving submodule is used to receive control commands from the terminal station, and to generate the switch control signal according to the control commands.

9. The cross-voltage domain power supply circuit according to claim 1, characterized in that, The switching device includes a double-pole double-throw high-voltage relay; The double-pole double-throw high-voltage relay includes two first contacts and two second contacts; One end of the switching switch is connected to the main power supply module, or to the backup power supply module, including: The two first contacts are respectively connected to the input and output terminals of the main power supply module, and the two second contacts are not connected; or the two second contacts are respectively connected to the input and output terminals of the backup power supply module, and the two first contacts are not connected.

10. A circuit control method, applied to a cross-voltage domain power supply circuit as described in any one of claims 1 to 9, characterized in that, include: A trunk detection submodule is set on the trunk of the cross-voltage domain power supply circuit, and a branch detection submodule is set on the branch of the cross-voltage domain power supply circuit. A control circuit submodule is provided on the main road or the branch road; The main power supply module acquires a first power supply status signal through the trunk line detection submodule, and the backup power supply module acquires a second power supply status signal through the branch line detection submodule; wherein the main power supply module is located on the trunk line, and the backup power supply module is located on the branch line. The control circuit submodule receives and processes the first power supply status signal and the second power supply status signal to generate a switch control signal. It also controls the on / off state of the first bypass switch and the second bypass switch, and the connection state of the switching switch according to the switch control signal. The connection state includes the switching switch forming a connection loop with the main power supply module, or the switching switch forming a connection loop with the backup power supply module. The first bypass switch is connected in parallel with the main power supply module and is used to bypass the main power supply module when it is turned on; the second bypass switch is connected in parallel with the backup power supply module and is used to bypass the backup power supply module when it is turned on; one end of the switching switch is connected to the main power supply module or the backup power supply module, and the other end of the switching switch is connected to the load function circuit module, for transmitting the power of the main power supply module to the load function circuit module so that the load function circuit module operates in the first voltage domain, or transmitting the power of the backup power supply module to the load function circuit module so that the load function circuit module operates in the second voltage domain.

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