CN109980917B - Power supply device suitable for seabed observation network constant voltage repeater or splitter - Google Patents

Power supply device suitable for seabed observation network constant voltage repeater or splitter Download PDF

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Publication number
CN109980917B
CN109980917B CN201711445381.4A CN201711445381A CN109980917B CN 109980917 B CN109980917 B CN 109980917B CN 201711445381 A CN201711445381 A CN 201711445381A CN 109980917 B CN109980917 B CN 109980917B
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circuit
voltage
series
series switch
power supply
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CN109980917A (en
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郭永刚
赵志国
张飞
曲赫
谭俊峰
刘宇鑫
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Institute of Acoustics CAS
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Institute of Acoustics CAS
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/0077—Plural converter units whose outputs are connected in series

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a power supply device suitable for a constant-voltage repeater or a splitter of a submarine observation network, which comprises an input filter circuit, a starting power circuit, a CV-CV series switch main circuit and a load filter circuit, wherein the input filter circuit is connected with the input power circuit; the direct-current high voltage is connected to two ends of the input filter circuit, and the starting power circuit and the CV-CV series switch main circuit are connected to the output end of the input filter circuit in parallel; the input end of the CV-CV series switch main circuit is connected with two ends of the input filter circuit, and the output end of the CV-CV series switch main circuit is connected with the load filter circuit; the high voltage is filtered by the input filter circuit and then is sent to the starting power circuit, the starting power circuit generates a starting voltage to trigger the CV-CV series switch main circuit, and the CV-CV series switch main circuit converts the high voltage into the low voltage and transmits the low voltage to the load through the load filter circuit. The device supports a wider voltage input range, the conversion efficiency is up to 90%, and the power loss is effectively reduced; and the device has simple structure, high redundancy, small volume and high reliability.

Description

Power supply device suitable for seabed observation network constant voltage repeater or splitter
Technical Field
The invention relates to the technical field of electronics, in particular to an electric energy supply device of a constant-voltage relay amplifier suitable for a submarine observation network.
Background
The submarine observation network comprises a shore base station, a submarine optical cable, a submarine main base station, submarine sensing observation equipment and the like, wherein a remote power supply of the shore base station supplies power to the submarine main base station through the submarine optical cable, the submarine main base station converts high-voltage power into low-voltage power to supply power to the submarine sensing equipment, the observation equipment collects and converts data through the main base station into optical signals, and the optical signals are transmitted to the shore base station through the submarine optical cable, so that real-time, continuous, all-weather, in-situ and long-term sequence submarine observation is realized.
As the length of the submarine cable increases, the transmission attenuation of the optical signal increases, so that an active repeater amplifier is required to perform repeater amplification on the optical signal. The relay amplifier consists of a laser pump and a power supply circuit, and the power required by the relay-amplified laser pump is usually in the range of tens of watts, but the reliability is extremely high. The remote power supply system is divided into two systems of constant voltage and constant current according to the power supply and distribution mode. The constant current power supply is mainly applied to the international transoceanic submarine communication network, namely, an electric energy supply circuit of an active relay amplifier of the power supply is a constant current conversion circuit. For the submarine observation network, because the submarine sensing observation equipment needs large power and has high requirement on expansibility, a plurality of constant voltage power supply systems are adopted, such as RSN in the United states and NEPTUNE submarine observation network in Canada. In a constant voltage power supply system, a constant voltage power conversion circuit suitable for a relay amplifier is limited by the requirements of size and reliability and foreign technical blockages, and no public data can be used for reference. In a traditional constant-voltage conversion circuit, for example, in a linear power supply scheme (as shown in fig. 1 and 2) in which an input voltage regulator tube and a resistor are connected in series, voltage division and conversion are realized in a multi-module series-parallel connection mode, although redundancy is high, conversion efficiency is low, equipment is complex, and the size is large, so that the application is difficult.
Aiming at the problems of low efficiency, poor reliability, large volume and the like of the existing high-voltage to low-voltage converter in a low-power and high-voltage to low-voltage circuit required by a constant-voltage repeater in a submarine observation network, a high-voltage to low-voltage conversion device with high reliability, high efficiency and small volume needs to be designed.
Disclosure of Invention
The invention aims to overcome the defects of the power supply device of the constant voltage repeater in the current submarine observation network, and provides the power supply device of the constant voltage repeater or the splitter of the submarine observation network, which has the advantages of small volume and high reliability.
In order to achieve the above object, the present invention provides a power supply device for a constant voltage repeater or splitter of a subsea observation network, the power supply device comprising an input filter circuit, a start power circuit, and a CV-CV series switch main circuit
The direct-current high voltage is connected to two ends of the input filter circuit, and the starting power circuit and the CV-CV series switch main circuit are connected to the output end of the input filter circuit in parallel; the input end of the CV-CV series switch main circuit is connected with two ends of the input filter circuit, and the output end of the CV-CV series switch main circuit is connected with the load filter circuit;
the high voltage is filtered by the input filter circuit and then is sent to the starting power circuit, the starting power circuit generates a starting voltage to trigger the CV-CV series switch main circuit, and the CV-CV series switch main circuit converts the high voltage into the low voltage and transmits the low voltage to the load through the load filter circuit.
As an improvement of the above apparatus, the apparatus further comprises: the input overvoltage and undervoltage protection circuit is used for realizing input voltage protection of the converter; the input overvoltage and undervoltage protection circuit is connected in parallel between the starting power circuit and the CV-CV series switch main circuit; the input overvoltage and undervoltage protection circuit comprises: the device comprises a sampling resistor, a reference power supply and a controller.
As an improvement of the above device, the input filter circuit is an LC filter circuit.
As a modification of the above device, the starting power supply circuit includes a starting resistor R1, an input capacitor C2, a zener diode D1, and a DC-DC converter; the starting resistor R1 is connected in series with an input capacitor C2, the input capacitor C2 is connected in parallel with a zener diode D1 and the DC-DC converter, and the starting power supply is used for supplying power to the whole converter in the starting stage.
As an improvement of the device, the load filter circuit is equivalent to a capacitance type device.
As an improvement of the above device, the CV-CV series switch main circuit includes: the circuit comprises a series switch circuit, a voltage-sharing module, a series switch driving circuit, a control circuit, a follow current switch circuit, an output filter circuit and a sampling circuit; the series switch circuit is connected with the input end;
the series switch circuit is formed by connecting a plurality of low-voltage switches in series; the follow current switch circuit and the output filter circuit form a parallel circuit; the series switch circuit is connected with the parallel circuit in series, and the voltage-sharing module is connected with each switch of the series switch circuit in parallel respectively and is used for realizing voltage-sharing protection; the series switch driving circuit is used for balancing voltage, a voltage balancing circuit is used on a load side of the series switch driving circuit for voltage balancing, and a high-efficiency synchronous driving circuit is used on a gate side of the series switch driving circuit; the control circuit controls the series switch circuit to change the on-off time and frequency of the switch to realize the conversion from high voltage to low voltage; voltage stabilization is realized through closed-loop control; the follow current switch circuit is formed by connecting a plurality of low-voltage switches in series, and when the series switch circuit is switched off, the inductor supplies power to the filter capacitor and the load through the follow current switch circuit; the series switch driving circuit, the control circuit and the sampling circuit are sequentially connected in series and used for performing voltage stabilization control on the CV-CV series switch main circuit.
As an improvement of the above device, the CV-CV series switch main circuit includes: the circuit comprises a series switch circuit, a voltage-sharing module, a series switch driving circuit, a control circuit, a follow current switch circuit, an output filter circuit and a sampling circuit; the follow current switch circuit is connected with the input end; the series switching circuit is directly grounded;
the series switch circuit is formed by connecting a plurality of low-voltage switches in series; the series switch circuit and the follow current switch circuit are connected in parallel with the output filter circuit; the voltage-sharing module is respectively connected with each switch of the series switch circuit in parallel; the series switch driving circuit is used for balancing voltage, a voltage balancing circuit is used on a load side of the series switch driving circuit for voltage balancing, and a high-efficiency synchronous driving circuit is used on a gate side of the series switch driving circuit; the control circuit controls the series switch circuit to change the on-off time and frequency of the switch to realize the conversion from high voltage to low voltage; voltage stabilization is realized through closed-loop control; the follow current switch circuit is formed by connecting a plurality of low-voltage switches in series, and when the series switch circuit is switched off, the inductor supplies power to the filter capacitor and the load through the follow current switch circuit; the series switch driving circuit, the control circuit and the sampling circuit are sequentially connected in series and used for performing voltage stabilization control on the CV-CV series switch main circuit.
As an improvement of the above device, the low voltage switch of the series switching circuit is an IGBT, a MOSFET, or a thyristor; the low-voltage switch of the follow current switch circuit is an IGBT, an MOSFET, a silicon controlled rectifier or a diode.
As an improvement of the above apparatus, the sampling circuit includes: a resistor R3, a resistor R5, a discharge tube DS2 and a resistor R4; the resistor R3 and the resistor R5 are connected in series and connected on an output voltage, the other end of the resistor R5 is grounded, and the discharge tube DS2 is connected with the resistor R5 in parallel; one end of the resistor R4 is connected with the discharge tube DS2, the other end is connected with a capacitor and is fed into an operational amplifier, and the resistor R4 is also connected with two diodes, wherein the cathode of one diode is connected with a negative power supply, and the anode of the diode is connected with a negative power supply; the anode of the other diode is connected with the positive power supply, and the cathode of the other diode is connected with the positive power supply.
The invention has the main innovation points that:
1. the high to low voltage converter of the present invention uses a series switching scheme. The design mainly uses a single module capable of bearing high voltage, and the module is formed by connecting a series of low-voltage electronic switch components in series, so that the problems of high cost, complex design and large volume of multi-module series-parallel voltage division are effectively solved;
2. the protection of the converter is realized by inputting an overvoltage and undervoltage protection circuit; voltage-sharing protection of the series-connected switching devices is realized by adopting a voltage-sharing module; by using high reliability devices, the reliability of the system is guaranteed.
3. The device can realize the conversion from 6-15kVDC high voltage to 12-48VDC low voltage, and the conversion efficiency can reach 90%. The method is particularly suitable for application scenes of tens of watts of power required by repeaters and splitters of the constant-voltage power supply submarine observation network.
The invention has the beneficial effects that:
1. the device supports a wider voltage input range, and the highest input voltage can reach 15kV or more; the conversion efficiency is up to 90%, and the power loss is effectively reduced;
2. the device has simple integral structure, high redundancy and small volume;
3. the device reduces the voltage born by a single power device by series voltage division, improves the reliability of the system and prolongs the service life of the system;
4. the device adopts a multi-module series-parallel combination mode, so that the damage of a single module can not cause the breakdown of the whole converter, and the reliability of the system is improved.
Drawings
FIG. 1 is a prior art constant current system series regulator circuit;
FIG. 2 is a prior art resistor series regulator linear high to low voltage circuit;
FIG. 3 is a prior art triode-type linear voltage regulator circuit;
FIG. 4 is a circuit diagram of the present invention;
FIG. 5 is a circuit schematic of the startup power supply of the present invention;
FIG. 6 is a schematic diagram of a sampling circuit of the main circuit of the CV-CV series switch of the present invention;
FIG. 7 is a schematic diagram of the main circuit connection mode 1 of the CV-CV series switch of the present invention;
FIG. 8 is a schematic diagram of the main circuit connection mode 2 of the CV-CV series switch of the present invention;
in FIG. 1, I + is the current inflow end, and I-is the current outflow end.
In fig. 4, HVin and GND are input high voltage terminals, and Uout and GND are output low voltage terminals.
In FIG. 5, hv and GND are input high voltage terminals, and U + and U-are output low voltage terminals of the starting circuit.
In fig. 6 Uout is the converter output voltage, and Ubk is the voltage after the output voltage is set.
In fig. 7, nodes 1 and 2 are incoming terminals, and nodes 3 and 4 are outgoing terminals.
In fig. 8, nodes 1 and 2 are incoming terminals, and nodes 3 and 4 are outgoing terminals.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings and specific examples.
As shown in fig. 4, a power supply device for a constant voltage repeater or splitter of a subsea observation network includes an input filter circuit, a start power supply, an input overvoltage and undervoltage protection circuit, a CV-CV series switch main circuit, and a load filter circuit. The input end of the input filter circuit bears high voltage direct current, the starting power supply and the input overvoltage and undervoltage protection circuit are connected in parallel at the output end of the input filter circuit, the input end of the main circuit of the CV-CV series switch is connected in parallel at the output end of the input filter circuit, the output end of the main circuit of the CV-CV series switch is connected in parallel at two ends of the load filter circuit, and the rear end of the load filter circuit is connected with a load.
Principle of operation
The high voltage is filtered by the input filter circuit and then is sent to the starting power supply, the low-voltage starting power supply is charged, the starting power supply generates a starting voltage to trigger the CV-CV series switch main circuit, the CV-CV series switch main circuit converts the high voltage into the low voltage, the input overvoltage and undervoltage protection circuit performs sampling comparison on the input voltage so as to protect the converter, and the input overvoltage and undervoltage protection circuit transmits the input voltage to a load through the load filter circuit.
1. Input filter circuit
The input filter circuit may be a typical LC filter circuit.
2. Starting power supply
As shown in fig. 5, the start-up power supply supplies power to the entire high-to-low voltage converter or device during the power-up start-up phase. The starting power supply comprises a starting resistor R1, an input capacitor C2, a voltage stabilizing diode D1 and a DC-DC converter. The A end is connected with a high-voltage input, the resistor R1 is connected with the C2 in series, and the C2 is connected with the voltage regulator tube and the DC-DC converter in parallel. The outputs are labeled as U + and U-.
High voltage is connected to the high-voltage resistor, the capacitor is charged through the high-voltage resistor, and charging is stopped when the voltage of the voltage regulator tube is reached. When the DC-DC power supply starts to work, the voltage of the voltage-regulator tube is converted into the voltage required by the CV-CV series switch main circuit control circuit. The energy of the DC-DC conversion voltage is determined by a charging capacitor, namely the capacity of the capacitor and the charging voltage determine the time for supplying power to the CV-CV series switch main circuit control circuit.
As shown in fig. 5, the circuit scheme of the linear power supply is used for the starting power supply, the service time is short, and the efficiency of the power supply in stable operation is not affected.
3. Input undervoltage protection circuit
The input overvoltage and undervoltage protection circuit comprises: the sampling resistor, the reference power supply and the controller realize input voltage protection of the converter.
CV-CV series type switch main circuit
The CV-CV series switch main circuit comprises: the circuit comprises a series switch circuit, a voltage-sharing module, a series switch driving circuit, a control circuit, a follow current switch circuit, a filter circuit and a sampling circuit.
The CV-CV series switch main circuit realizes the transformation of input and output by a Pulse Width Modulation (PWM) mode and a Pulse Frequency Modulation (PFM) mode. The pulse width modulation mode is to convert high voltage into low voltage by controlling duty ratio; pulse frequency modulation is the conversion of high voltage to low voltage by changing the frequency of the output.
When the series switch circuit is conducted, high voltage charges a filter circuit at the rear stage through the series switch circuit, the high voltage charges a filter capacitor through a current-limiting inductor inside the filter circuit, and when the output voltage amplitude is reached, electric energy is stored in an inductor device and a capacitor device in the filter circuit; when the series switching circuit is turned off, the inductor supplies power to the filter capacitor and the load through the freewheeling switching circuit.
(1) Series switch circuit
The series switching circuit is the core component of the present invention. The series switch circuit is formed by connecting a series of low-voltage electronic switches in series, and the series switches bear the high voltage of the system in the switching process. When the series switch circuit is conducted, the input voltage amplitude reaches more than 15kV, and each series switch device bears unequal voltage UxTotal input voltage UGeneral assembly＝U1+U2+U3+ …. The voltage-dividing mode reduces the voltage borne by a single electronic switch, and if the electronic switch breaks down, the voltage borne by the electronic switch is UxThe system can be dispersed to other electronic switches to ensure the normal operation of the system, thereby improving the reliability of the system and reducing the risk of the system.
Meanwhile, the circuit is positioned in an underwater sealed cavity, the heat dissipation of elements needs to be fully considered, the switch device mainly adopts IGBT, MOSFET, silicon controlled rectifier and the like, and the components made of the materials have high working frequency, have the characteristics of low on-resistance, small chip size and high temperature and high pressure resistance, and are beneficial to realizing the miniaturization of a module, the miniaturization of peripheral components and the simplification of a cooling mechanism. In the implementation, the problems in terms of cost, application technique, and the like are considered, and are not limited to these types.
(2) Voltage-sharing module
When the series switching circuit is turned off and turned on, each switching device can bear unequal voltage, namely unbalanced voltage distribution is caused, so that the switching devices are damaged. Therefore, the voltage-sharing module is added in the series switch circuit to carry out voltage-sharing protection on the series switch circuit, and the reliable operation of the switch is ensured.
(3) Series switch driving circuit
Because the switching speed of the devices is very high and basically finished within a few microseconds, voltage imbalance among the switching devices is easily caused, including static voltage imbalance, on-state voltage imbalance, off-state voltage imbalance, on-state voltage imbalance and off-state voltage imbalance. In order to solve the voltage balancing problem, the load side uses a voltage-sharing circuit to carry out voltage sharing, and the gate side adopts a high-efficiency synchronous driving circuit.
(4) Control circuit
The control circuit controls the series switch circuit to change the on-off time and frequency of the switch to realize the conversion from high voltage to low voltage. The system voltage is stabilized through closed-loop control of the control circuit.
(5) Follow current switch circuit
The follow current switch circuit is composed of a series of low voltage switches connected in series, and when the series switch circuit is turned off, the inductor supplies power to the filter capacitor and the load through the follow current switch circuit. After being connected in series, the high voltage of the system in the switching process is born together. The switching device is mainly selected from an IGBT, a MOSFET, a silicon controlled rectifier, a diode and the like, but is not limited to the types.
(6) Output filter circuit
The output filter circuit may be a typical LC filter circuit.
(7) Sampling circuit
As shown in fig. 6, the sampling circuit uses a voltage-resistant resistor to perform sampling, thereby realizing closed-loop control of the main circuit of the series switch. Wherein the sampling resistor R3 is connected in series with the R5 and is coupled between the output end and the ground; discharge tube DS1 is connected in parallel with R5; one end of R4 is connected with discharge tube DS1, and the other end is connected with operational amplifier through capacitor; two diodes are connected simultaneously, wherein the cathode of one diode is connected, and the anode of the diode is connected with a negative power supply; the anode of the other diode is connected with the positive power supply, and the cathode of the other diode is connected with the positive power supply.
(8) Connection mode of main circuit of series switch
① CV-CV series switch main circuit connection mode 1:
as shown in fig. 7, the node 1 is an input terminal, the series switching circuit is connected to the node 1, and the freewheeling switching circuit and the filter circuit are connected in parallel and then connected in series with the series switching circuit. The voltage-sharing module is respectively connected with each switch in the series switch circuit in parallel. The outputs of the filter circuit are referenced as node 3 and node 4, with node 2 connected to ground.
② CV-CV series switch main circuit connection mode 2:
as shown in fig. 8, a node 1 is an input terminal, and the freewheel switch circuit is connected in parallel with the filter circuit and then connected in series with the series switch circuit. The voltage-sharing module is respectively connected with each switch of the series switch circuit in parallel. The outputs of the filter circuit are recorded as node 3 and node 4, node 2 is grounded, and the series switching circuit is connected to node 2.
Both of these switching modes can be adopted, and have equal benefits. Through a plurality of switch components and parts series connection, reduce the voltage that single component and part bore, the normal operating of entire system can not be influenced in single switch components and parts's harm, has improved system reliability, reduces the marine plant maintenance cost. In practical application, the number of the switching devices can be selected according to requirements by considering input voltage, design modes and the like. For example, if a voltage of 15kV is inputted and a single switching device can bear a voltage of about 4000V, a minimum of 4 switching devices can be selected to meet the requirement.
5. Load filter circuit
The load filter circuit is equivalent to a capacitive device.
The invention can be used as an electric energy conversion module in a relay and a splitter of a submarine observation network, is suitable for a constant-voltage optical fiber communication system with two ends supplied with high voltage, and can also be suitable for high-voltage to low-voltage conversion in other low-power occasions.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (14)

1. A power supply device suitable for a constant-voltage repeater or amplifier of a submarine observation network is characterized by comprising an input filter circuit, a starting power circuit, a CV-CV series switch main circuit and a load filter circuit;
the direct-current high voltage is connected to two ends of the input filter circuit, and the starting power circuit and the CV-CV series switch main circuit are connected to the output end of the input filter circuit in parallel; the input end of the CV-CV series switch main circuit is connected with two ends of the input filter circuit, and the output end of the CV-CV series switch main circuit is connected with the load filter circuit;
the high voltage is filtered by the input filter circuit and then is sent to the starting power circuit, the starting power circuit generates a starting voltage to trigger the CV-CV series switch main circuit, and the CV-CV series switch main circuit converts the high voltage into the low voltage and transmits the low voltage to a load through the load filter circuit;
the CV-CV series switch main circuit comprises: the circuit comprises a series switch circuit, a voltage-sharing module, a series switch driving circuit, a control circuit, a follow current switch circuit, an output filter circuit and a sampling circuit; the series switch circuit is connected with the input end;
the series switch circuit is formed by connecting a plurality of low-voltage switches in series; the follow current switch circuit and the output filter circuit form a parallel circuit; the series switch circuit is connected with the parallel circuit in series, and the voltage-sharing module is connected with each switch of the series switch circuit in parallel respectively and is used for realizing voltage-sharing protection; the series switch driving circuit is used for balancing voltage, a voltage balancing circuit is used on a load side of the series switch driving circuit for voltage balancing, and a high-efficiency synchronous driving circuit is used on a gate side of the series switch driving circuit; the control circuit controls the series switch circuit to change the on-off time and frequency of the switch to realize the conversion from high voltage to low voltage; voltage stabilization is realized through closed-loop control; the follow current switch circuit is formed by connecting a plurality of low-voltage switches in series, and when the series switch circuit is switched off, the inductor supplies power to the filter capacitor and the load through the follow current switch circuit; the series switch driving circuit, the control circuit and the sampling circuit are sequentially connected in series and used for performing voltage stabilization control on the CV-CV series switch main circuit.
2. The power supply device for the subsea observation network constant voltage repeater or amplifier as claimed in claim 1, further comprising: the input overvoltage and undervoltage protection circuit is used for realizing input voltage protection of the converter; the input overvoltage and undervoltage protection circuit is connected in parallel between the starting power circuit and the CV-CV series switch main circuit; the input overvoltage and undervoltage protection circuit comprises: the device comprises a sampling resistor, a reference power supply and a controller.
3. The power supply device for the constant voltage repeater or amplifier of the subsea observation network as claimed in claim 1, wherein said input filter circuit is an LC filter circuit.
4. The power supply device suitable for the subsea observation network constant voltage repeater or amplifier as claimed in claim 1, wherein the starting power circuit comprises a starting resistor R1, an input capacitor C2, a zener diode D1 and a DC-DC converter; the starting resistor R1 is connected in series with an input capacitor C2, the input capacitor C2 is connected in parallel with a zener diode D1 and a DC-DC converter, and the starting power supply supplies power to the entire converter during the start-up phase.
5. The power supply device for the constant voltage repeater or amplifier of the subsea observation network as claimed in claim 1, wherein the load filter circuit is equivalent to a capacitive device.
6. The power supply device suitable for the subsea observation network constant voltage repeater or amplifier as claimed in claim 1, wherein the low voltage switch of the series switching circuit is an IGBT, a MOSFET or a thyristor; the low-voltage switch of the follow current switch circuit is an IGBT, an MOSFET, a silicon controlled rectifier or a diode.
7. The power supply device of claim 1, wherein the sampling circuit comprises: a resistor R3, a resistor R5, a discharge tube DS2 and a resistor R4; the resistor R3 and the resistor R5 are connected in series and connected on an output voltage, the other end of the resistor R5 is grounded, and the discharge tube DS2 is connected with the resistor R5 in parallel; one end of the resistor R4 is connected with the discharge tube DS2, the other end is connected with a capacitor and is fed into an operational amplifier, and the resistor R4 is also connected with two diodes, wherein the cathode of one diode is connected with a negative power supply, and the anode of the diode is connected with a negative power supply; the anode of the other diode is connected with the positive power supply, and the cathode of the other diode is connected with the positive power supply.
8. A power supply device suitable for a constant-voltage repeater or amplifier of a submarine observation network is characterized by comprising an input filter circuit, a starting power circuit, a CV-CV series switch main circuit and a load filter circuit;
the direct-current high voltage is connected to two ends of the input filter circuit, and the starting power circuit and the CV-CV series switch main circuit are connected to the output end of the input filter circuit in parallel; the input end of the CV-CV series switch main circuit is connected with two ends of the input filter circuit, and the output end of the CV-CV series switch main circuit is connected with the load filter circuit;
the high voltage is filtered by the input filter circuit and then is sent to the starting power circuit, the starting power circuit generates a starting voltage to trigger the CV-CV series switch main circuit, and the CV-CV series switch main circuit converts the high voltage into the low voltage and transmits the low voltage to a load through the load filter circuit; the CV-CV series switch main circuit comprises: the circuit comprises a series switch circuit, a voltage-sharing module, a series switch driving circuit, a control circuit, a follow current switch circuit, an output filter circuit and a sampling circuit; the follow current switch circuit is connected with the input end; the series switching circuit is directly grounded;
the series switch circuit is formed by connecting a plurality of low-voltage switches in series; the series switch circuit and the follow current switch circuit are connected in parallel with the output filter circuit; the voltage-sharing module is respectively connected with each switch of the series switch circuit in parallel; the series switch driving circuit is used for balancing voltage, a voltage balancing circuit is used on a load side of the series switch driving circuit for voltage balancing, and a high-efficiency synchronous driving circuit is used on a gate side of the series switch driving circuit; the control circuit controls the series switch circuit to change the on-off time and frequency of the switch to realize the conversion from high voltage to low voltage; voltage stabilization is realized through closed-loop control; the follow current switch circuit is formed by connecting a plurality of low-voltage switches in series, and when the series switch circuit is switched off, the inductor supplies power to the filter capacitor and the load through the follow current switch circuit; the series switch driving circuit, the control circuit and the sampling circuit are sequentially connected in series and used for performing voltage stabilization control on the CV-CV series switch main circuit.
9. The power supply apparatus for a subsea observation network constant voltage repeater or amplifier as claimed in claim 8, further comprising: the input overvoltage and undervoltage protection circuit is used for realizing input voltage protection of the converter; the input overvoltage and undervoltage protection circuit is connected in parallel between the starting power circuit and the CV-CV series switch main circuit; the input overvoltage and undervoltage protection circuit comprises: the device comprises a sampling resistor, a reference power supply and a controller.
10. The power supply device for the constant voltage repeater or amplifier of the subsea observation network as claimed in claim 8, wherein the input filter circuit is an LC filter circuit.
11. The power supply device suitable for the subsea observation network constant voltage repeater or amplifier as claimed in claim 8, wherein the starting power circuit comprises a starting resistor R1, an input capacitor C2, a zener diode D1 and a DC-DC converter; the starting resistor R1 is connected in series with an input capacitor C2, the input capacitor C2 is connected in parallel with a zener diode D1 and a DC-DC converter, and the starting power supply supplies power to the entire converter during the start-up phase.
12. The power supply device for the constant voltage repeater or amplifier of the subsea observation network as claimed in claim 8, wherein the load filter circuit is equivalent to a capacitive device.
13. The power supply device for the subsea observation network constant voltage repeater or amplifier as claimed in claim 8, wherein the low voltage switch of the series switching circuit is an IGBT, a MOSFET or a thyristor; the low-voltage switch of the follow current switch circuit is an IGBT, an MOSFET, a silicon controlled rectifier or a diode.
14. The power supply device of claim 8, wherein the sampling circuit comprises: a resistor R3, a resistor R5, a discharge tube DS2 and a resistor R4; the resistor R3 and the resistor R5 are connected in series and connected on an output voltage, the other end of the resistor R5 is grounded, and the discharge tube DS2 is connected with the resistor R5 in parallel; one end of the resistor R4 is connected with the discharge tube DS2, the other end is connected with a capacitor and is fed into an operational amplifier, and the resistor R4 is also connected with two diodes, wherein the cathode of one diode is connected with a negative power supply, and the anode of the diode is connected with a negative power supply; the anode of the other diode is connected with the positive power supply, and the cathode of the other diode is connected with the positive power supply.
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CN110798390B (en) * 2019-11-13 2023-11-07 深圳欧特海洋科技有限公司 Communication system and communication method for power supply and distribution system of submarine observation network
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