CN117559824A - High-power direct-current power supply circuit and device for current stabilization control - Google Patents
High-power direct-current power supply circuit and device for current stabilization control Download PDFInfo
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- CN117559824A CN117559824A CN202311451983.6A CN202311451983A CN117559824A CN 117559824 A CN117559824 A CN 117559824A CN 202311451983 A CN202311451983 A CN 202311451983A CN 117559824 A CN117559824 A CN 117559824A
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- power supply
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- 230000006641 stabilisation Effects 0.000 title claims abstract description 13
- 238000011105 stabilization Methods 0.000 title claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 13
- 238000002955 isolation Methods 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/162—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
- H02M7/1623—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit
- H02M7/1626—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit with automatic control of the output voltage or current
-
- 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
- H02M1/007—Plural converter units in cascade
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a high-power direct-current power supply circuit and a device for current stabilization control, comprising a charging protection unit, a power unit and a current-limiting filtering unit, wherein one end of the charging protection unit is connected with one end of an alternating-current power supply, the other end of the charging protection unit is connected with one end of the power unit, the other end of the power unit is connected with the current-limiting filtering unit, the other end of the alternating-current power supply is grounded, and the power unit is of a cascade structure. The invention can be used for loads with large impedance fluctuation, which need to stabilize direct current, and ensure the stability of load current, thereby ensuring the safe and reliable operation of equipment and improving the production efficiency.
Description
Technical Field
The invention belongs to the technical field of direct current power supplies, and particularly relates to a high-power direct current power supply circuit and device for current stabilization control.
Background
The high-power direct-current power supply device is used for providing stable direct-current voltage or direct-current for a direct-current load. The basic principle of the current high-power direct-current power supply device in the market is that alternating-current voltage is converted into direct-current voltage through a rectifying circuit and then is output through a filtering circuit and a voltage stabilizing circuit. The DC power supply can achieve better performance for the load with small fluctuation, but the output characteristic of the DC power supply is obviously deteriorated for the high fluctuation load, and even the DC power supply cannot work normally.
The prior art cannot meet the requirement of high-fluctuation load, such as a high-voltage large-capacity arc generating device, on the stability of the output current of a direct-current power supply.
Disclosure of Invention
The invention aims to solve the problem that the prior art cannot meet the requirement of high-volatility load on the stability of output current of a direct current power supply, and provides a high-power direct current power supply circuit and a device for current stabilizing control.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a high-power direct current power supply circuit for stationary flow control, includes the protection cell that charges, power unit, current-limiting filter unit, the one end of alternating current power supply is connected to the one end of protection cell that charges, the one end of power unit is connected to the other end of protection cell that charges, current-limiting filter unit is connected to the other end of power unit, alternating current power supply's the other end ground connection, power unit is cascade structure.
Further, the power unit comprises a three-winding transformer, and the output end of the three-winding transformer is connected with the power module; the power module is provided with a three-phase bridge type half-control rectifying circuit, the three-phase bridge type half-control rectifying circuit comprises a thyristor and a power diode, the thyristor comprises a first thyristor, a second thyristor and a third thyristor, the power diode comprises a first power diode, a second power diode, a third power diode and a fourth power diode, one end of the three-phase bridge type half-control rectifying circuit is connected with one end of a third reactor, the other end of the third reactor is connected with one end of a discharging resistor and one end of a capacitor, the other end of the discharging resistor and the other end of the capacitor are connected with the other end of the three-phase bridge type half-control rectifying circuit, one end of the capacitor is connected with a collector of an IGBT, an emitter of the IGBT is connected with a cathode of the fourth power diode, the other end of the capacitor is connected with an anode of the fourth power diode, and the IGBT is antiparallel connected with the diode.
Further, the power module comprises a first power module and a second power module, wherein the positive electrode of a fourth power diode in the first power module is connected with the negative electrode of the fourth power diode in the second power module.
Further, n power units are arranged, each power unit comprises a first power unit, the positive electrode of a fourth power diode in a second power module of the first power unit is connected with the negative electrode of a fourth power diode in the first power module of the second power unit, the positive electrode of the fourth power diode in the second power module of the second power unit is connected with the negative electrode … … of the fourth power diode in the first power module of the third power unit, and the n power units are connected into a circuit in a cascading manner.
Further, a current limiting filter unit is connected between the cathode of the fourth power diode in the first power module of the first power unit and the anode of the fourth power diode in the second power module of the nth power unit.
Further, the charging protection unit comprises an isolation disconnecting link, one end of the alternating current power supply is connected with one end of the isolation disconnecting link, the other end of the isolation disconnecting link is connected with one end of a circuit breaker, the other end of the circuit breaker is connected with one end of a charging resistor, and the other end of the charging resistor is connected with one end of a power unit; a first grounding disconnecting link is connected between one end of the circuit breaker and the isolating disconnecting link, and a second grounding disconnecting link is connected between the other end of the charging resistor and one end of the power unit; one end of the circuit breaker is connected with one end of the bypass circuit breaker, and the other end of the circuit breaker is connected with the other end of the bypass circuit breaker.
Further, the current limiting filter unit comprises a reactor, wherein the reactor comprises a first reactor and a second reactor, and a load is connected between the first reactor and the second reactor.
Further, a direct current disconnecting link is connected between the first reactor and the load.
Further, the load includes a large capacity direct current electric load such as an arc generating device.
A high-power direct current power supply device for current stabilization control comprises a high-power direct current power supply circuit for current stabilization control.
Compared with the prior art, the invention has the following beneficial technical effects:
the high-power direct current power supply circuit for current stabilizing control can be used for loads with large impedance fluctuation, wherein the loads need to be stabilized with direct current. By adopting a multi-power unit cascade structure and rapidly adjusting the number of input power units, the invention can rapidly and widely adjust the output direct-current voltage, thereby ensuring the stability of load current, ensuring the safe and reliable operation of equipment and improving the production efficiency.
The invention provides a power supply device capable of rapidly responding to direct current output current change, and when load impedance is suddenly changed, the stability of direct current can be maintained by rapidly adjusting output direct current voltage.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a block diagram of a high power DC power supply device for current stabilizing control according to the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
The utility model provides a high-power direct current power supply circuit for stationary flow control, includes the protection cell that charges, power unit, current-limiting filter unit, and the one end of alternating current power supply is connected to the one end of protection cell that charges, and the one end of power unit is connected to the other end of protection cell that charges, and current-limiting filter unit is connected to the other end of power unit, and alternating current power supply's the other end ground connection, power unit are cascade structure.
The power unit comprises a three-winding transformer, and the output end of the three-winding transformer is connected with the power module; the power module is provided with a three-phase bridge type half-control rectifying circuit, the three-phase bridge type half-control rectifying circuit comprises a thyristor and a power diode, the thyristor comprises a first thyristor, a second thyristor and a third thyristor, the power diode comprises a first power diode, a second power diode, a third power diode and a fourth power diode, one end of the three-phase bridge type half-control rectifying circuit is connected with one end of a third reactor, the other end of the third reactor is connected with one end of a discharging resistor and one end of a capacitor, the other end of the discharging resistor and the other end of the capacitor are connected with the other end of the three-phase bridge type half-control rectifying circuit, one end of the capacitor is connected with a collector electrode of an IGBT, an emitter electrode of the IGBT is connected with a cathode electrode of the fourth power diode, and the other end of the capacitor is connected with an anode electrode of the fourth power diode in anti-parallel with the IGBT.
The power module comprises a first power module and a second power module, wherein the positive electrode of a fourth power diode in the first power module is connected with the negative electrode of the fourth power diode in the second power module.
The power units are n, the power units comprise a first power unit, the positive electrode of a fourth power diode in a second power module of the first power unit is connected with the negative electrode of a fourth power diode in a first power module of the second power unit, the positive electrode of the fourth power diode in the second power module of the second power unit is connected with the negative electrode of the fourth power diode in the first power module of a third power unit, and the n power units are connected into the circuit in a cascading manner.
The negative electrode of the fourth power diode in the first power module of the first power unit and the positive electrode of the fourth power diode in the second power module of the nth power unit are connected with a current-limiting filter unit.
The charging protection unit comprises an isolation disconnecting link, one end of an alternating current power supply is connected with one end of the isolation disconnecting link, the other end of the isolation disconnecting link is connected with one end of a circuit breaker, the other end of the circuit breaker is connected with one end of a charging resistor, and the other end of the charging resistor is connected with one end of a power unit; the first grounding disconnecting link is connected between one end of the circuit breaker and the isolation disconnecting link, and the second grounding disconnecting link is connected between the other end of the charging resistor and one end of the power unit; one end of the circuit breaker is connected with one end of the bypass circuit breaker, and the other end of the circuit breaker is connected with the other end of the bypass circuit breaker.
The current-limiting filter unit comprises a reactor, wherein the reactor comprises a first reactor and a second reactor, and a load is connected between the first reactor and the second reactor.
And a direct current disconnecting link is connected between the first reactor and the load.
The load includes a large capacity dc load such as an arc generator.
A high-power direct current power supply device for current stabilization control comprises a high-power direct current power supply circuit for current stabilization control.
Example two
As shown in FIG. 1, the high-power direct-current power supply circuit for current stabilization control comprises a charging protection unit, a power unit and a current-limiting filter unit, wherein one end of the charging protection unit is connected with one end of an alternating-current power supply, the other end of the charging protection unit is connected with one end of the power unit, the other end of the power unit is connected with the current-limiting filter unit, and the other end of the alternating-current power supply is grounded.
The charging protection unit comprises an isolation disconnecting link G1, a first grounding disconnecting link G2, a second grounding disconnecting link G3, a circuit breaker Brk, a bypass circuit breaker Bss and a charging resistor R; the current-limiting filtering unit comprises a reactor L01, a reactor L02 and a direct-current disconnecting link G4.
The power units are arranged in a plurality; the power unit is composed of the following elements: the three-winding transformer, a first power diode D1, a second power diode D2, a third power diode D3 and a fourth power diode D4, a first thyristor T1, a second thyristor T2, a third thyristor T3, a reactor L1, a discharge resistor R1, a capacitor C1 and an IGBT (including an anti-parallel diode) T4.
A start sequence control of a high-power direct current power supply circuit for current stabilizing control:
1) Separating the grounding knife switches G2 and G3;
2) Closing the isolating knife switch G1, G4;
3) Closing a breaker Brk;
4) Closing the circuit breaker Bss;
5) Switching on thyristors T1, T2 and T3 of each power unit to charge the power module capacitor;
6) After the charging is completed, the charging resistor bypass breaker Bss is closed;
7) And unlocking the power circuit thyristor and entering an operating state.
Shutdown sequence control of a high-power direct-current power supply circuit for current stabilizing control:
1) Locking a power supply circuit thyristor, and reducing the direct current output current to 0;
2) A branch Brk breaker;
3) A sub Bss circuit breaker;
4) Separating and isolating the disconnecting links G1 and G4;
5) And closing the grounding knife switches G2 and G3 to finish shutdown.
A high-power direct current power supply device for current stabilization control comprises a high-power direct current power supply circuit for current stabilization control.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of protection thereof, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: various changes, modifications, or equivalents may be made to the particular embodiments of the invention by those skilled in the art after reading the present disclosure, but such changes, modifications, or equivalents are within the scope of the invention as defined in the appended claims.
Claims (10)
1. The high-power direct-current power supply circuit for current stabilization control is characterized by comprising a charging protection unit, a power unit and a current-limiting filtering unit, wherein one end of the charging protection unit is connected with one end of an alternating-current power supply, the other end of the charging protection unit is connected with one end of the power unit, the other end of the power unit is connected with the current-limiting filtering unit, the other end of the alternating-current power supply is grounded, and the power unit is of a cascading structure.
2. The high-power direct current power supply circuit for current stabilizing control according to claim 1, wherein the power unit comprises a three-winding transformer, and an output end of the three-winding transformer is connected with a power module; the power module is provided with a three-phase bridge type semi-control rectifying circuit, the three-phase bridge type semi-control rectifying circuit comprises a thyristor and a power diode, the power diode comprises a fourth power diode, one end of a third reactor is connected with one end of the three-phase bridge type semi-control rectifying circuit, the other end of the third reactor is connected with one end of a discharging resistor and one end of a capacitor, the other end of the discharging resistor and the other end of the capacitor are connected with the other end of the three-phase bridge type semi-control rectifying circuit, one end of the capacitor is connected with a collector electrode of an IGBT, an emitter electrode of the IGBT is connected with a negative electrode of the fourth power diode, the other end of the capacitor is connected with an anode electrode of the fourth power diode, and the IGBT is connected with an anti-parallel diode.
3. The high-power direct current power supply circuit for current stabilizing control according to claim 2, wherein the power modules comprise a first power module and a second power module, and the anode of a fourth power diode in the first power module is connected with the cathode of a fourth power diode in the second power module.
4. A high-power direct current power supply circuit for current stabilizing control according to claim 3, wherein n power units are provided, the power units comprise a first power unit, the positive electrode of a fourth power diode in a second power module of the first power unit is connected with the negative electrode of a fourth power diode in a first power module of the second power unit, the positive electrode of the fourth power diode in the second power module of the second power unit is connected with the negative electrode of a fourth power diode in a first power module of a third power unit, and n power units are connected into the circuit in cascade.
5. The high-power direct current power supply circuit for current stabilizing control according to claim 4, wherein a current limiting filter unit is connected between a negative electrode of a fourth power diode in a first power module of the first power unit and a positive electrode of the fourth power diode in a second power module of the nth power unit.
6. The high-power direct-current power supply circuit for current stabilization control according to claim 1, wherein the charging protection unit comprises an isolation disconnecting link, one end of the alternating-current power supply is connected with one end of the isolation disconnecting link, the other end of the isolation disconnecting link is connected with one end of a circuit breaker, the other end of the circuit breaker is connected with one end of a charging resistor, and the other end of the charging resistor is connected with one end of a power unit; a first grounding disconnecting link is connected between one end of the circuit breaker and the isolating disconnecting link, and a second grounding disconnecting link is connected between the other end of the charging resistor and one end of the power unit; one end of the circuit breaker is connected with one end of the bypass circuit breaker, and the other end of the circuit breaker is connected with the other end of the bypass circuit breaker.
7. The high-power direct-current power supply circuit for steady-state control according to claim 1, wherein the current-limiting filter unit comprises a reactor, the reactor comprises a first reactor and a second reactor, and a load is connected between the first reactor and the second reactor.
8. The high power dc power supply circuit for current stabilizing control according to claim 7, wherein a dc knife switch is connected between the first reactor and the load.
9. The high power dc power supply circuit for current stabilizing control according to claim 7, wherein said load is a high capacity dc power load comprising an arc generating means.
10. A high power dc power supply device for current stabilizing control, comprising a high power dc power supply circuit, characterized in that the high power dc power supply circuit is the high power dc power supply circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451983.6A CN117559824A (en) | 2023-11-02 | 2023-11-02 | High-power direct-current power supply circuit and device for current stabilization control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451983.6A CN117559824A (en) | 2023-11-02 | 2023-11-02 | High-power direct-current power supply circuit and device for current stabilization control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117559824A true CN117559824A (en) | 2024-02-13 |
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ID=89811967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311451983.6A Pending CN117559824A (en) | 2023-11-02 | 2023-11-02 | High-power direct-current power supply circuit and device for current stabilization control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117559824A (en) |
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2023
- 2023-11-02 CN CN202311451983.6A patent/CN117559824A/en active Pending
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