CN107888089B - High-voltage direct-current power supply - Google Patents
High-voltage direct-current power supply Download PDFInfo
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- CN107888089B CN107888089B CN201711085646.4A CN201711085646A CN107888089B CN 107888089 B CN107888089 B CN 107888089B CN 201711085646 A CN201711085646 A CN 201711085646A CN 107888089 B CN107888089 B CN 107888089B
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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
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
-
- 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
- H02M1/0083—Converters characterised by their input or output configuration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
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- Dc-Dc Converters (AREA)
Abstract
The invention provides a high-voltage direct-current power supply which comprises at least two cascaded boosting rectification modules, wherein the input end of each boosting rectification module is connected with an alternating-current power grid, the output end of each boosting rectification module is connected with a load and provides boosted direct-current voltage for the load, each boosting rectification module comprises a power frequency rectification unit and an inversion boosting unit, the power frequency rectification unit is used for rectification, the inversion boosting unit is used for inverting and boosting the voltage rectified by the rectification unit, and finally the boosted direct-current voltage is filtered through a high-voltage filtering module to obtain a pure high-voltage direct-current power supply on the load. The high-voltage direct current generation mode is replaced by a cascade mode of the multi-stage rectifier modules, the boost transformation ratio is reduced, the high-voltage power supply ripple is reduced, the high-voltage filter module is used for further filtering high-frequency ripple, and the safe and reliable operation of the system is guaranteed.
Description
Technical Field
The invention belongs to the technical field of high-voltage direct-current power supplies, and particularly relates to a high-voltage direct-current power supply.
Background
The high-power high-voltage direct-current power supply is widely applied to industries such as high-voltage direct-current transmission, electron beam welding machines, electrostatic dust removal, X-ray machines, klystrons and the like, and is also applied to scientific researches such as high-energy physics, controlled nuclear transformation and the like, and the early high-power supply adopts a linear power supply, a power frequency or intermediate frequency energy conversion technology and a Pulse Step Modulation (PSM) technology based on intermediate frequency energy conversion, and has larger size and lower efficiency. As power electronics have evolved, higher frequencies may be used for energy conversion.
The high-power klystron is a microwave vacuum electronic device for converting electron beam energy into microwave energy based on a speed modulation principle. The klystron has wide application in the deep space detection radar transmitter due to the obvious characteristics of high power, high efficiency and the like. The klystron power supply as a key component in the transmitter directly influences key indexes such as measurement and control distance, communication quality and the like, so that the klystron power supply is one of key equipment in the whole system.
A high-voltage high-power klystron power supply belongs to a high-voltage direct-current power supply, and in order to overcome the problem of signal to noise ratio deterioration caused by long-distance transmission to the maximum extent, deep space measurement and control system equipment has higher requirements on the output frequency spectrum of a transmitter, and further has extremely strict requirements on the high-voltage power supply, and the ripple of the high-voltage power supply is required to be less than 1 per thousand.
In order to meet the ripple requirement, linear power supply technology or high-transformation-ratio boost power supply is mostly adopted in the industry at present, but with the continuous increase of voltage grade and power, the linear power supply and the common high-voltage boost power supply have difficulty in meeting the requirements of the industry on heat dissipation, floor area and ripple.
Disclosure of Invention
The invention aims to provide a high-voltage direct-current power supply which is used for solving the problems of high ripple wave and low reliability of the high-voltage direct-current power supply in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a high-voltage direct-current power supply comprises at least two cascaded boosting rectifying modules, wherein the input end of each boosting rectifying module is connected with an alternating-current power grid, and the output end of each boosting rectifying module is connected with a load and used for providing boosted direct-current voltage for the load.
Further, the boost rectification module comprises a power frequency rectification unit, an inversion boost unit and a high-voltage switching unit, wherein the power frequency rectification unit is used for rectification, the inversion boost unit is used for inverting and boosting the voltage rectified by the rectification unit, and the high-voltage switching unit is used for controlling the switching of the boost rectification module at the current stage.
Further, the power frequency rectifying unit comprises a full-bridge rectifying subunit and an LC filtering subunit, and the output end of the full-bridge rectifying subunit is connected with the LC filtering subunit.
Further, the inverting and boosting unit comprises an LC series resonance and a boosting transformer, and the primary side of the boosting transformer is connected with the LC series resonance.
Further, the boost rectification module further comprises a high-voltage switching unit, the high-voltage switching unit comprises a solid-state switch and a follow current branch, the high-voltage switching unit controls the switching of the boost rectification module at the current stage through the solid-state switch, and the follow current branch is used for follow current of the boost rectification module at the current stage.
Further, the boost rectifying module further comprises an input filtering unit and an output filtering unit.
And the cascaded boost rectifying module is used for being connected with a load through the high-voltage filtering module.
Further, the direct current control module is further included and is in control connection with the boost rectifying module and the high-voltage filtering module.
Further, the high-voltage filtering module comprises an energy leakage unit, and the energy leakage unit is used for consuming energy in the high-voltage direct-current power supply system when the high-voltage direct-current power supply system fails.
Further, the high-voltage filter module further comprises a protection unit, and the protection unit is used for starting energy consumption in the load when the power supply is cut off.
The invention has the beneficial effects that:
the invention provides a high-voltage direct-current power supply which comprises at least two cascaded boosting rectifying modules, wherein the input end of each boosting rectifying module is connected with an alternating-current power grid, and the output end of each boosting rectifying module is connected with a load and used for providing boosted direct-current voltage for the load. The high-voltage direct-current power supply adopts a low-voltage cascade mode, reduces the boosting change, reduces the ripple waves of the high-voltage direct-current power supply, and ensures the safe and reliable operation of the system.
The high-voltage direct-current power supply also comprises a high-voltage filtering module which is used for further filtering high-frequency ripples to obtain high voltage with lower ripples, so that the safety, accuracy and reliability of the system are ensured.
Drawings
FIG. 1 is a schematic block diagram of a high voltage DC power supply of the present invention;
FIG. 2 is a functional block diagram of a boost rectifier module of the present invention;
FIG. 3 is a functional block diagram of a high voltage filtering module of the present invention;
FIG. 4 is a schematic diagram of the working principle of the high voltage filter module of the present invention;
FIG. 5 is a functional block diagram of the DC control module of the present invention;
FIG. 6 is a schematic diagram of a human-machine interface of a DC control module according to the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings:
the embodiment of the high-voltage direct-current power supply comprises the following steps:
a high-voltage direct-current power supply comprises at least two boosting rectification modules, wherein 4-10 boosting rectification modules are taken as an example in the embodiment, the boosting rectification modules are cascaded, the input end of each boosting module is connected with an alternating-current power grid, the output end of each boosting rectification module is connected with a klystron load, a high-voltage generation mode is converted into a multistage low-voltage module cascade mode, boosting change is reduced, and ripples of the high-voltage power supply are reduced.
To illustrate by a specific example, if the ac power grid outputs 10KV, and the klystron load requires 100KV, if the output voltage of the ac power grid is directly boosted, a transformation ratio of 10 times is required to obtain 100KV, at this time, the transformation ratio is relatively large, and the obtained high voltage is impure and has relatively high ripple ratio. By adopting the mode of the invention, through cascading a plurality of low-voltage boosting rectifying modules, for example, 5 boosting rectifying modules are adopted, the high voltage of 100KV can be obtained by only boosting each boosting rectifying module to 20KV and adding the boosting of 5 boosting rectifying modules.
The high-voltage direct-current power supply also comprises a direct-current control module, the direct-current control module is in control connection with all the boosting rectifying modules, the remote background is connected with the direct-current control module through a communication optical fiber, and can also be directly controlled locally through a human-computer interface of the control module, as shown in fig. 6, then the control module controls the charging operation of all the boosting rectifying modules and controls an internal output switch thereof to obtain high voltage in series connection, and the high voltage is loaded on a klystron load.
The boost rectification module is a power execution core of the whole high-voltage direct-current power supply system, and converts alternating current into direct current with high precision and low ripple by adopting a power electronic conversion technology, a soft switching technology, a PFM control technology, a multidimensional filtering technology, a high-voltage solid-state switching technology and the like, and comprises an input filtering unit, a power frequency rectification unit, an inversion boosting unit, a high-voltage switching unit and an output filtering unit as shown in fig. 2. This power frequency rectification filter unit carries out rectification filter to alternating voltage, and power frequency rectification unit adopts three-phase full-bridge six pulse wave rectification technique, realizes alternating current-direct current conversion, is equipped with passive power factor correction circuit for improve power factor, power frequency rectification unit end contains the electric capacity heap, and this part is used for carrying out the energy storage filtering.
The inversion boosting unit is used for inverting and boosting rectified voltage and comprises a full-bridge rectifier subunit, an LC series resonance, a boosting inverter and a high-voltage rectification filter subunit. Adopt full-bridge resonance soft switch topology, the resonance mode adopts LC series resonance, adopts full load range ZCS's soft switching technique, and simultaneously, this contravariant booster unit's high pressure rectification filtering subunit adopts high-pressure silicon to pile the full-bridge, and this part carries out the integrated design with step-up transformer to adopt high-pressure film capacitor to filter, finally output high voltage direct current.
The high-voltage switching unit comprises a solid-state switch and a follow current branch circuit, the solid-state switch comprises a plurality of stages of IGBTs connected in series and parallel and is used for switching the boost rectifier module according to the system requirement, the follow current branch circuit comprises a plurality of stages of high-voltage silicon stacks connected in series and parallel and is used for enabling the whole power supply cascade system to realize seamless follow current when the boost rectifier module performs switching action, and the normal operation of the system is ensured.
The input filtering unit and the output filtering unit are high-order low-pass filters, so that high-frequency interference is effectively filtered, and the function of reducing output ripples is realized.
The direct current control module is composed of a Siemens PLC programmable controller (including a master control PLC226, an EM222, an EM223, an EM277 and the like), as shown in FIG. 5, the direct current control module is a control core of the whole power supply system, can control the phase-staggered charging and the net hanging switching of the boosting rectification module, changes a charging strategy into a phase-staggered complementary charging mode, further reduces power supply ripples from the system angle, and can also realize the detection of each key point, the control of a corresponding functional unit and a human-computer interface, the whole system fault protection and the '4 remote' function of an upper computer, and specifically realizes the following functions:
1) and (4) control functions: the control of the startup and shutdown and switching of the boost rectification module, the operation of the filtering module and the like are jointly completed through the master control PLC component and the internal board card of the device;
2) a state display function: as shown in fig. 6: and the working state, the output voltage and the current of the high-voltage direct-current power supply and various faults (including alternating current input faults, power output overvoltage, power output overcurrent and the like) are displayed through a local human interface (connected with the master control PLC component through the EM 277).
3) The output regulation function: the output function of adjusting the high-voltage direct-current power supply is completed together through the master control PLC assembly and the board card in the device.
4) And (4) fault protection function: through the master control PLC assembly and the board card inside the device, fault protection is provided for the power supply system, and fault processing is performed in time after fault information is sampled.
5) The communication function is as follows: and the remote control system is connected with a remote background in an optical fiber communication mode (connected with a master control PLC component through ADAM 4541) to realize the function of 'four remote'.
The high-voltage direct-current power supply also comprises a high-voltage filtering module, wherein the high-voltage filtering module is positioned at the tail end of the power supply output, the ripple of the output high-voltage power supply is further reduced, and a relatively pure high-voltage power supply is obtained; the sampling unit collects the voltage and current of the network collection system through high precision.
The structure of the energy leakage unit is shown in fig. 4, the leakage unit comprises a leakage resistor R1 and a leakage switch K1, the leakage switch K1 and the leakage resistor R1 are connected in series, when the energy leakage unit is in a normal operation state, the leakage switch is disconnected, and a leakage loop does not work; when the device is in a shutdown or fault state, the release switch is closed, and the release loop is connected to the high-voltage loop and used for releasing the stored energy of the system.
When the system has an emergency fault and needs to cut off the power supply, the high-voltage discharge tube of the protection unit is closed, and the high-voltage discharge tube is used for quickly discharging energy in a klystron load and stray capacitance energy storage in a loop.
When the high-voltage direct-current power supply works, the direct-current control module controls the built-in solid-state switches to control the boost rectifier module to operate in an electrified mode, then the on-off of the solid-state switches in the boost rectifier module is controlled to obtain series high-voltage direct current, and finally the high-voltage direct current is filtered through the high-voltage filter to obtain a pure high-voltage direct-current power supply on a klystron load.
The specific embodiments are given above, but the present invention is not limited to the above-described embodiments. The basic idea of the present invention lies in the above basic scheme, and it is obvious to those skilled in the art that no creative effort is needed to design various modified models, formulas and parameters according to the teaching of the present invention. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (4)
1. A high-voltage direct-current power supply is characterized by comprising at least two cascaded boost rectifying modules, wherein the input end of each boost rectifying module is connected with an alternating-current power grid, and the output end of each boost rectifying module is connected in series and then is connected with a load to provide boosted direct-current voltage for the load; the boost rectifying module comprises a power frequency rectifying unit, an inversion boosting unit and a high-voltage switching unit, wherein the power frequency rectifying unit is used for rectifying, the inversion boosting unit is used for performing inversion boosting on the voltage rectified by the rectifying unit, and the high-voltage switching unit is used for controlling the switching of the boost rectifying module at the current stage; the high-voltage switching unit comprises a solid-state switch and a follow current branch, the high-voltage switching unit controls the switching of the boost rectifying module of the current stage through the solid-state switch, and the follow current branch is used for follow current of the boost rectifying module of the current stage; the boost rectifying module further comprises an input filtering unit and an output filtering unit;
the cascaded boost rectifier module is used for being connected with a load through the high-voltage filter module; the high-voltage filtering module further comprises an energy leakage unit and a protection unit, the energy leakage unit is used for consuming energy in the high-voltage direct-current power supply system when the high-voltage direct-current power supply system is in a shutdown state or the high-voltage direct-current power supply system is in a fault state, and the protection unit is used for starting to consume energy in the load when the power supply needs to be cut off when an emergency fault occurs.
2. The high-voltage direct current power supply according to claim 1, wherein the power frequency rectifying unit comprises a full-bridge rectifying sub-unit and an LC filtering sub-unit, and an output end of the full-bridge rectifying sub-unit is connected with the LC filtering sub-unit.
3. The HVDC power supply of claim 1, wherein the inverting boost unit comprises an LC series resonance and a boost transformer, the primary side of the boost transformer being connected to the LC series resonance.
4. The HVDC power supply of claim 1, further comprising a DC control module that controls connection of the boost rectifier module and the high voltage filter module.
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| CN201711085646.4A CN107888089B (en) | 2017-11-07 | 2017-11-07 | High-voltage direct-current power supply |
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| CN201711085646.4A CN107888089B (en) | 2017-11-07 | 2017-11-07 | High-voltage direct-current power supply |
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| EP3977616A4 (en) * | 2019-05-24 | 2023-06-14 | Eagle Harbor Technologies, Inc. | Klystron driver |
| CN114094835B (en) * | 2021-11-01 | 2024-06-21 | 许继电源有限公司 | Main circuit topology of high-voltage mining power supply |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101510696A (en) * | 2009-03-30 | 2009-08-19 | 中国科学院等离子体物理研究所 | High-power waveform generator |
| CN103986363A (en) * | 2014-05-14 | 2014-08-13 | 大连泰格尔电子科技有限公司 | High-frequency multiple high voltage pulse generating method, high-frequency multiple high voltage pulse power supply and electric precipitator |
| CN204205325U (en) * | 2014-09-12 | 2015-03-11 | 东莞市澳星通信设备有限公司 | A kind of high-voltage DC power supply |
| CN105915041A (en) * | 2016-07-04 | 2016-08-31 | 珠海格力电器股份有限公司 | Charge bleed-off method, bleeder circuit and converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0683577B2 (en) * | 1987-04-23 | 1994-10-19 | 日新電機株式会社 | High voltage DC power supply |
| CN101582646A (en) * | 2008-05-16 | 2009-11-18 | 武汉国测科技股份有限公司 | Method and device for stacking power of high-frequency high-voltage direct-current switch power supply for electrostatic precipitator |
| CN106492990A (en) * | 2016-10-14 | 2017-03-15 | 江苏绿洁节能有限公司 | A kind of high-frequency high-voltage dust removing power supply |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510696A (en) * | 2009-03-30 | 2009-08-19 | 中国科学院等离子体物理研究所 | High-power waveform generator |
| CN103986363A (en) * | 2014-05-14 | 2014-08-13 | 大连泰格尔电子科技有限公司 | High-frequency multiple high voltage pulse generating method, high-frequency multiple high voltage pulse power supply and electric precipitator |
| CN204205325U (en) * | 2014-09-12 | 2015-03-11 | 东莞市澳星通信设备有限公司 | A kind of high-voltage DC power supply |
| CN105915041A (en) * | 2016-07-04 | 2016-08-31 | 珠海格力电器股份有限公司 | Charge bleed-off method, bleeder circuit and converter |
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