CN111146950A - Single-drive power tube series connection type seabed high-voltage direct current converter - Google Patents

Single-drive power tube series connection type seabed high-voltage direct current converter Download PDF

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Publication number
CN111146950A
CN111146950A CN202010049719.XA CN202010049719A CN111146950A CN 111146950 A CN111146950 A CN 111146950A CN 202010049719 A CN202010049719 A CN 202010049719A CN 111146950 A CN111146950 A CN 111146950A
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voltage
gate
drive
power tube
sharing
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CN202010049719.XA
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吕枫
郑劭铎
周怀阳
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Tongji University
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Tongji University
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    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Conversion In General (AREA)

Abstract

The invention relates to a single-drive power tube series-connection type submarine high-voltage direct current converter which adopts a high-frequency pulse width modulation phase-shift control full-bridge topology and adopts a high-frequency transformer to isolate a primary side and a secondary side, wherein 4 single-drive power tube series-connection high-voltage modules (1) are adopted in an inversion part of the single-drive power tube series-connection type submarine high-voltage direct current converter in front of the isolation transformer, and each single-drive power tube series-connection high-voltage module comprises an additional charging circuit (3), an external drive circuit (4), a plurality of gate RCD drive voltage-sharing circuits (2), a static voltage-sharing resistor, a gate protection Zener diode, a gate negative-voltage Zener diode and power tubes which are sequentially connected in series. Compared with the prior art, the invention has the advantages of better solving the step-down conversion from thousands of volts of high-voltage direct current to hundreds of volts of medium-voltage direct current, higher stability and reliability, and the like.

Description

Single-drive power tube series connection type seabed high-voltage direct current converter
Technical Field
The invention relates to the technical field of ocean power electronics, in particular to a series-connection type seabed high-voltage direct-current converter with a single driving power tube.
Background
At present, in the fields of marine scientific research, disaster early warning, resource development and the like, the types and the number of required used seabed equipment are more and more, the detection range of the seabed equipment to be covered is wider and wider, and the time for in-situ continuous operation is required to be longer and longer. With the increasing complexity and intelligence, various subsea devices consume more and more power and require more and more power to be supplied to them. Therefore, the conventional ship-based inspection mode has difficulty in meeting the current requirements of the fields in terms of power supply, and the problem of abundant and continuous power supply for long-term operation of a large amount of equipment on the seabed can be solved only by realizing long-distance and large-range power transmission through a seabed observation network connected to the land.
In the submarine observation network, a standard submarine photoelectric composite communication submarine cable used in a transoceanic communication system is generally adopted for direct-current power transmission, and in order to cover a wider submarine area, the power transmission voltage needs to be increased to DC2kV-10kV so as to reduce the power loss on the submarine cable. The subsea equipment is usually powered by tens of volts of low-voltage direct current, so that several kilovolts of high-voltage direct current need to be stepped down. Among them, the subsea hvdc converter is used as a primary step-down device to convert a high-voltage direct current of several kilovolts into a medium-voltage direct current of several hundred volts, and is required to have high reliability, high stability, high energy density, high conversion efficiency, and compact size. The existing submarine high-voltage direct-current converter is based on a modular combined structure, the electromechanical integrated structure is complex, and the reliability and stability of the device are reduced.
The withstand voltage of the seabed direct current converter is improved by connecting a plurality of power tubes in series, and the realized high-voltage direct current converter has the advantages of simple structure, high reliability and the like. However, since the power transistor device has no automatic dynamic voltage equalizing characteristic, the voltage imbalance at two ends of the series power transistor may be caused by a slight difference between the self parameter and the driving parameter, which may cause a local overvoltage of the series power transistor to cause damage. Each power tube in the traditional power tube series connection technology needs an independent external drive circuit, power isolation between the independent external drive circuits depends on magnetic isolation or optical isolation, and the whole circuit structure is complex and difficult to miniaturize. The existing single-drive power tube series connection technology has the defects of few power tubes which can be connected in series, poor voltage-sharing effect, incapability of maintaining module conduction for a long time, requirement of an additional gate auxiliary power supply and the like.
Disclosure of Invention
The invention aims to overcome the defects of low reliability and stability, poor voltage-sharing effect of a single-drive power tube, incapability of maintaining module conduction for a long time and need of an additional gate auxiliary power supply of the submarine high-voltage direct-current converter in the prior art, and provides a single-drive power tube series-connected submarine high-voltage direct-current converter.
The purpose of the invention can be realized by the following technical scheme:
a single-drive power tube series connection type submarine high-voltage direct-current converter adopts a high-frequency pulse width modulation phase-shift control full-bridge topology and adopts a high-frequency transformer to isolate a primary side and a secondary side, an inversion part of the single-drive power tube series connection type submarine high-voltage direct-current converter in front of the isolation transformer adopts 4 single-drive power tube series connection high-voltage modules, and each single-drive power tube series connection high-voltage module comprises an additional charging circuit, an external drive circuit, a plurality of gate RCD drive voltage-sharing circuits, a static voltage-sharing resistor, a gate protection Zener diode, a gate negative voltage Zener diode and power tubes which are sequentially connected in series.
The gate RCD drive voltage-sharing circuit, the static voltage-sharing resistor, the grid protection Zener diode, the grid negative voltage Zener diode and the power tube are same in number and are in one-to-one correspondence, the power tube is a single tube element, and the cathode of the grid protection Zener diode and the cathode of the grid negative voltage Zener diode are connected with each other and then are connected in parallel with the two ends of the gate and the emitter of the power tube.
The last gate RCD driving voltage-sharing circuit in the gate RCD driving voltage-sharing circuits is connected with the two ends of the collector and the emitter of the last power tube in parallel, the last gate RCD driving voltage-sharing circuit is the gate RCD driving voltage-sharing circuit farthest from an external driving circuit, the rest gate RCD driving voltage-sharing circuits are connected with the gates of the second power tube to the last power tube and the two ends of the emitters of the first power tube to the last power tube in parallel in sequence, and the last power tube is the power tube farthest from the external driving circuit.
And a driving signal end and a ground end of the external driving circuit are respectively connected with a gate electrode and an emitting electrode of the last power tube.
The gate RCD driving voltage-sharing circuit comprises a gate dynamic voltage-sharing capacitor, a gate driving resistor and a gate accelerating diode, wherein the gate driving resistor and the gate accelerating diode are connected in parallel and then connected in series with the gate dynamic voltage-sharing capacitor.
The cathode of the grid accelerating diode is connected with the gate dynamic voltage-sharing capacitor, and the other end of the gate dynamic voltage-sharing capacitor is connected with the emitting electrode of the power tube.
And the static voltage-sharing resistor is sequentially connected in parallel at two ends of the gate pole dynamic voltage-sharing capacitor.
The extra charging circuit comprises an auxiliary charging power supply, a plurality of high-voltage isolation diodes and current-limiting resistors, wherein the number of the high-voltage isolation diodes and the number of the current-limiting resistors are one less than that of the power tubes.
The anode of the auxiliary charging power supply is connected with the anode of the first high-voltage isolation diode, and the cathode of the auxiliary charging power supply is connected with the emitter of the first power tube.
The cathode of the previous high-voltage isolation diode in the high-voltage isolation diodes is connected with the anode of the next high-voltage isolation diode, one end of the current-limiting resistor is connected with the cathode of the corresponding high-voltage isolation diode, and the other end of the current-limiting resistor is connected with the cathode of the grid accelerating diode in the gate RCD driving voltage-sharing circuit.
Compared with the prior art, the invention has the following beneficial effects:
1. the high-frequency pulse width modulation phase-shift control full-bridge topology adopts the high-frequency transformer to isolate the primary side and the secondary side, can better solve the step-down conversion from thousands of volts of high-voltage direct current to hundreds of volts of medium-voltage direct current, and has higher stability and reliability and high power density.
2. The external driving circuit of the single-driving power tube series high-voltage module can drive any number of power tubes in series by using only one driver, and meanwhile, the problem of series voltage sharing of the power tubes can be well solved, the influence of fluctuation on the power tubes is reduced, and the stability among a plurality of power tubes is improved.
3. The single-drive power tube series high-voltage module can realize gate pole negative-pressure drive.
4. The additional charging circuit can provide continuous and stable driving voltage for the power tubes connected in series, and provides possibility for the single-driving power tube connected in series with the high-voltage module in low-frequency application.
5. The single-drive power tube series high-voltage module has a simple structure, can well solve the problem of complex drive isolation in the series connection of the traditional semiconductor devices, and realizes the miniaturization of the module.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of a single-driving power tube series high-voltage module according to the present invention.
Reference numerals:
1, connecting a single driving power tube in series with a high-voltage module; 2-gate RCD driving voltage-sharing circuit; 3-an additional charging circuit; 4-external driving circuit.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the single-drive power tube series-connected type subsea high-voltage direct-current converter adopts a high-frequency pulse width modulated phase-shift control full-bridge topology, and adopts a high-frequency transformer to isolate a primary side and a secondary side, and the single-drive power tube series-connected type subsea high-voltage direct-current converter adopts 4 single-drive power tube series-connected high-voltage modules 1 in an inversion part before an isolation transformer, and as shown in fig. 2, the single-drive power tube series-connected high-voltage modules include an additional charging circuit 3, an external driving circuit 4, a plurality of gate electrode RCD driving voltage-sharing circuits 2, static voltage-sharing resistors, gate protection zener diodes, gate negative voltage zener diodes, and power tubes connected in series in sequence.
The gate RCD driving voltage-sharing circuit 2, the static voltage-sharing resistor, the grid protection Zener diode, the grid negative voltage Zener diode and the power tube are same in number and are in one-to-one correspondence, the power tube is a single tube element, and the cathode of the grid protection Zener diode and the cathode of the grid negative voltage Zener diode are connected with each other and then are connected in parallel with the two ends of the gate and the emitter of the power tube.
The last gate RCD driving voltage-sharing circuit 2 in the gate RCD driving voltage-sharing circuits 2 is connected with the two ends of the collector and the emitter of the last power tube in parallel, the last gate RCD driving voltage-sharing circuit 2 is the gate RCD driving voltage-sharing circuit 2 farthest from the external driving circuit 4, the rest gate RCD driving voltage-sharing circuits 2 are connected with the gate of the second to the last power tube and the two ends of the emitter of the first to the last power tube in parallel in sequence, and the last power tube is the power tube farthest from the external driving circuit 4.
The driving signal terminal and the ground terminal of the external driving circuit 4 are respectively connected with the gate electrode and the emitter electrode of the last power tube.
The gate RCD driving voltage-sharing circuit 2 comprises a gate dynamic voltage-sharing capacitor, a gate driving resistor and a gate accelerating diode, wherein the gate driving resistor and the gate accelerating diode are connected in parallel and then connected in series with the gate dynamic voltage-sharing capacitor.
The cathode of the grid accelerating diode is connected with the gate dynamic voltage-sharing capacitor, and the other end of the gate dynamic voltage-sharing capacitor is connected with the emitting electrode of the power tube.
The static voltage-sharing resistor is connected in parallel with two ends of the gate dynamic voltage-sharing capacitor in sequence.
The extra charging circuit 3 includes an auxiliary charging power supply, a plurality of high-voltage isolation diodes and current-limiting resistors, the number of which is one less than the number of power transistors.
The anode of the auxiliary charging power supply is connected with the anode of the first high-voltage isolation diode, and the cathode of the auxiliary charging power supply is connected with the emitter of the first power tube.
The cathode of the previous high-voltage isolation diode in the plurality of high-voltage isolation diodes is connected with the anode of the next high-voltage isolation diode, one end of the current-limiting resistor is connected with the cathode of the corresponding high-voltage isolation diode, and the other end of the current-limiting resistor is connected with the cathode of the grid accelerating diode in the corresponding gate RCD driving voltage-sharing circuit 2.
Example one
The single-drive power tube series connection type seabed high-voltage direct current converter adopts a full-bridge topology controlled by high-frequency Pulse Width Modulation (PWM) phase shift, and adopts a high-frequency transformer to isolate a primary side and a secondary side. The inversion part of the DC converter before the isolation transformer adopts 4 single-drive power tubes to connect with a high-voltage module S in series1-S4. Series connection of 4 single-drive power tubes and high-voltage modules S by adopting UC3875 phase-shifted full-bridge control chip1-S4Providing a phase shift towards the control signal.
The single-drive power tube series high-voltage module 1 comprises an additional charging circuit 3, an external drive circuit 4 and 3 IGBT power tubes T which are sequentially connected in series1-T 33 gate RCD driving voltage- sharing circuits 2 and 3 static voltage-sharing resistors Rs,1-R s,33 grid protection Zener diodes Z1,1-Z 1,33 grid negative voltage Zener diode Z2,1-Z2,3。
IGBT power tube T1-T3The model is IXBH42N170, and the rated withstand voltage is 1700V.
Gate electrode dynamic voltage-sharing capacitor C in gate electrode RCD driving voltage-sharing circuit 21-C3A patch high-voltage ceramic capacitor is adopted, and the capacitance value is 400 pF; gate drive resistor Rg,2-Rg,4Adopting a high-voltage resistor with rated power of 5W and resistance of 50 omega; grid accelerating diode Dg,2-Dg,4The model number of the high-voltage power supply is BYG10Y-E3/TR, and the rated withstand voltage is 1600V.
Static voltage-sharing resistor Rs,1-Rs,3A high-voltage resistor with rated power of 1W and resistance of 2M omega is adopted.
Grid protection Zener diode Z1,1-Z1,3And grid negative voltage Zener diode Z2,1-Z2,3Model number 1N5352BG, rated Zener voltage 15V.
Is additionally provided withAuxiliary charging power supply V in charging circuit 3gonA power management chip with the model number of LM2586 is adopted, and the output voltage is 48V; high-voltage isolation diode D1-D2The model number of the transformer is BYG10Y-E3/TR, and the rated withstand voltage is 1600V; current limiting resistor R1-R2A resistor with a rated power of 0.25W and a resistance of 10k omega is adopted.
The external driving circuit 4 adopts a power tube driving isolation chip with model number of TLP350 and a high-voltage isolation power supply module with model number of G1215S-2 WR.
The double-pulse experiment is carried out on the single-drive power tube serial high-voltage module through a 3kV high-voltage direct-current power supply, the direct-current conversion from direct-current 400V input to 48V output is realized, and the single-drive power tube serial high-voltage module under the circuit structure has good switching characteristic and voltage-sharing effect through verification, can realize high-frequency switching, and is beneficial to the miniaturization of a seabed high-voltage direct-current converter.
In addition, it should be noted that the specific embodiments described in the present specification may have different names, and the above descriptions in the present specification are only illustrations of the structures of the present invention. Minor or simple variations in the structure, features and principles of the present invention are included within the scope of the present invention. Various modifications or additions may be made to the described embodiments or methods may be similarly employed by those skilled in the art without departing from the scope of the invention as defined in the appending claims.

Claims (10)

1. The single-drive power tube series-connection type seabed high-voltage direct current converter is characterized in that the single-drive power tube series-connection type seabed high-voltage direct current converter adopts a high-frequency pulse width modulation phase-shift control full-bridge topology and adopts a high-frequency transformer to isolate a primary side and a secondary side, an inversion part of the single-drive power tube series-connection type seabed high-voltage direct current converter before an isolation transformer adopts 4 single-drive power tube series-connection high-voltage modules (1), and the single-drive power tube series-connection high-voltage modules comprise an additional charging circuit (3), an external drive circuit (4) and a plurality of gate RCD drive voltage-sharing circuits (2), a static voltage-sharing resistor, a gate protection Zener diode, a gate negative pressure Zener diode and power tubes.
2. The single-drive power tube series-connection type submarine high-voltage direct current converter according to claim 1, wherein the gate RCD drive voltage-sharing circuits (2), the static voltage-sharing resistors, the grid protection Zener diodes, the grid negative voltage Zener diodes and the power tubes are identical in number and correspond to one another one to one, the power tubes are single-tube elements, and cathodes of the grid protection Zener diodes and cathodes of the grid negative voltage Zener diodes are connected with one another and then connected in parallel to two ends of a gate and an emitter of the power tubes.
3. The single-drive power tube series-connection type subsea HVDC converter of claim 1, wherein the last gate RCD drive voltage-sharing circuit (2) of the gate RCD drive voltage-sharing circuits (2) is connected in parallel to the two ends of the collector and the emitter of the last power tube, the last gate RCD drive voltage-sharing circuit (2) is the gate RCD drive voltage-sharing circuit (2) farthest from the external drive circuit (4), the rest gate RCD drive voltage-sharing circuits (2) are connected in parallel to the gates of the second to the last power tubes and the two ends of the emitters of the first to the last power tubes in turn, and the last power tube is the power tube farthest from the external drive circuit (4).
4. A single drive power tube series connected subsea hvdc converter according to claim 3, wherein the drive signal and ground terminals of said external drive circuit (4) are connected to the gate and emitter of the last said power tube, respectively.
5. The single-drive power tube series-connection type subsea HVDC converter according to claim 1, wherein the gate RCD drive voltage-sharing circuit (2) comprises a gate dynamic voltage-sharing capacitor, a gate drive resistor and a gate accelerating diode, and the gate drive resistor and the gate accelerating diode are connected in parallel and then connected in series with the gate dynamic voltage-sharing capacitor.
6. The single-drive power tube series-connection type subsea HVDC converter of claim 5, wherein the cathode of the gate accelerating diode is connected to the gate dynamic equalizing capacitor, and the other end of the gate dynamic equalizing capacitor is connected to the emitter of the power tube.
7. The single-drive-power-tube series-connection type subsea HVDC converter of claim 5, wherein the static equalizing resistor is connected in parallel to the gate dynamic equalizing capacitor in turn.
8. A single drive power tube series connected subsea HVDC converter according to claim 5, characterized in that the additional charging circuit (3) comprises an auxiliary charging power supply, a number of high voltage isolation diodes and current limiting resistors, the number of high voltage isolation diodes and current limiting resistors being one less than the number of power tubes.
9. The single-drive-power-tube series-connected submarine HVDC converter according to claim 8, wherein the positive pole of the auxiliary charging power source is connected to the anode of the first high-voltage isolation diode, and the negative pole of the auxiliary charging power source is connected to the emitter of the first power tube.
10. The single-drive power tube series-connection type subsea HVDC converter of claim 8, wherein the cathode of the previous high-voltage isolation diode in the plurality of high-voltage isolation diodes is connected to the anode of the next high-voltage isolation diode, and the current-limiting resistor is connected to the cathode of the corresponding high-voltage isolation diode at one end and to the cathode of the gate accelerating diode in the gate RCD drive voltage-sharing circuit (2) at the other end.
CN202010049719.XA 2020-01-16 2020-01-16 Single-drive power tube series connection type seabed high-voltage direct current converter Pending CN111146950A (en)

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CN202010049719.XA CN111146950A (en) 2020-01-16 2020-01-16 Single-drive power tube series connection type seabed high-voltage direct current converter

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Application Number Priority Date Filing Date Title
CN202010049719.XA CN111146950A (en) 2020-01-16 2020-01-16 Single-drive power tube series connection type seabed high-voltage direct current converter

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CN111146950A true CN111146950A (en) 2020-05-12

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