CN106533131B - DC converter valve with pulse excitation device - Google Patents
DC converter valve with pulse excitation device Download PDFInfo
- Publication number
- CN106533131B CN106533131B CN201611024180.2A CN201611024180A CN106533131B CN 106533131 B CN106533131 B CN 106533131B CN 201611024180 A CN201611024180 A CN 201611024180A CN 106533131 B CN106533131 B CN 106533131B
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- pulse
- direct current
- liquid metal
- converter valve
- insulating
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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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20945—Thermal management, e.g. inverter temperature control
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention relates to a direct current converter valve with a pulse excitation device, which comprises a liquid metal heat exchange assembly, a pulse excitation assembly and a direct current electric field switch, wherein the liquid metal heat exchange assembly is connected with the pulse excitation assembly through the direct current electric field switch; the liquid metal heat exchange assembly comprises an insulating heat conduction layer, an insulating leather tube and liquid metal, wherein the insulating heat conduction layer is wrapped on the periphery of the direct current converter valve body, the inner wall of the insulating heat conduction layer is in contact with the outer wall of the direct current converter valve body, the insulating leather tube is wrapped on the periphery of the insulating heat conduction layer, and the liquid metal is filled in a gap between the insulating leather tube and the insulating heat conduction layer; the pulse excitation assembly comprises a pulse transformer, a tap, a PWM (pulse width modulation) controller and a secondary pulse winding, wherein the PWM controller is electrically connected with the pulse transformer, the tap and the secondary pulse winding in sequence. Compared with the prior art, the invention adopts PWM to control the liquid metal to dissipate heat and has the advantages of high flexibility, high efficiency, small volume, low power consumption and long service life.
Description
Technical Field
The invention relates to the technical field of liquid metal heat dissipation control, in particular to a direct current converter valve with a pulse excitation device.
Background
The direct current transmission technology is the most effective technical means for solving the problems of long-distance and large-capacity transmission and grid interconnection, and is commonly adopted in high-voltage transmission engineering. The core equipment of the power transmission end converter station is a direct current converter valve, and in the power transmission end converter station complete equipment with a value of billions, the cost of the core equipment is about 22-25% of the total value of the power transmission end converter station complete equipment, so that the performance of the direct current converter valve is important to the whole power transmission engineering. The performance of the converter performance of the direct current converter valve is directly affected by the quality of the cooling effect of the cooling system of the direct current converter valve, so that the improvement of the heat dissipation effect of the direct current converter valve is an important problem.
At present, the direct current converter valve mainly adopts water cooling, and the heat generated by the valve body is taken away by deionized water, so that the heat dissipation purpose is achieved. In the prior art, a liquid metal heat dissipation system for dissipating heat of a direct current converter valve by adopting liquid metal is provided, wherein the heat dissipation system comprises a liquid metal radiator internally provided with a liquid metal pipeline, a first heat exchanger internally provided with two pipelines and a second heat exchanger internally provided with one pipeline, one pipeline in the first heat exchanger is connected with the liquid metal pipeline to form a liquid metal circulation loop, and the other pipeline in the first heat exchanger is connected with the pipeline in the second heat exchanger to form a deionized water circulation loop. The liquid metal heat radiation system is driven by the electromagnetic pump, specifically, the electromagnetic pump provides a pair of vertical intersecting magnetic fields and currents for the liquid metal, so that the liquid metal in the pipeline is subjected to electromagnetic force along the pipeline direction, the liquid metal is pushed to flow in the pipeline, the stressed size of the liquid metal is regulated by changing the strength of the magnetic field or the current, the flow velocity of the liquid metal is regulated, and the purpose of regulating the heat radiation effect is achieved.
However, the electromagnetic pump for radiating the direct current converter valve needs to be provided with a larger stator winding to present axial induction force when transmitting large-flow liquid metal, and the corresponding electromagnetic pump has larger volume, is not beneficial to flexible operation and is also not beneficial to saving cost from the aspect of economy. In addition, if the flow rate of the liquid metal is to be changed, the magnetic field intensity or the current is required to be adjusted, and the controllable factor of the electromagnetic pump driving mode is only the flow rate of the liquid metal, so that other state parameters such as the state and the efficiency of the liquid metal cannot be controlled, and flexible control is not facilitated.
Disclosure of Invention
In order to overcome the problems in the related art, the invention provides a direct current converter valve with a pulse excitation device.
The invention provides a direct current converter valve with a pulse excitation device, which comprises a liquid metal heat exchange assembly, a pulse excitation assembly and a direct current electric field switch, wherein the liquid metal heat exchange assembly and the pulse excitation assembly are connected through the direct current electric field switch; the liquid metal heat exchange assembly comprises a direct current converter valve body, an insulating heat conduction layer, an insulating leather tube and liquid metal, wherein the insulating heat conduction layer is wrapped on the periphery of the direct current converter valve body, the inner wall of the insulating heat conduction layer is in contact with the outer wall of the direct current converter valve body, the insulating leather tube is wrapped on the periphery of the insulating heat conduction layer, and the liquid metal is filled in a gap between the insulating leather tube and the insulating heat conduction layer; the pulse excitation assembly comprises a magnetic pole, a pulse transformer, a tap, a PWM (pulse width modulation) controller, a secondary pulse winding and an iron core; the direct current electric field switch is in contact with the liquid metal, the pulse transformer and the tap are wound at one end of the iron core, the secondary pulse winding is wound at the other end of the iron core, the tap is connected with the direct current electric field switch through a wire, the secondary pulse winding is connected with the magnetic pole through a wire, and the PWM controller is sequentially and electrically connected with the pulse transformer, the tap and the secondary pulse winding.
Preferably, the insulating and heat conducting layer is ceramic silica gel.
Preferably, the core is a high permeability core.
Preferably, the PWM pulse width modulation controller is a linear high performance current mode controller.
Preferably, the liquid metal is gallium indium alloy liquid metal.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects:
the invention provides a direct current converter valve with a pulse excitation device, which comprises a liquid metal heat exchange assembly, a pulse excitation assembly and a direct current electric field switch, wherein the liquid metal heat exchange assembly and the pulse excitation assembly are connected through the direct current electric field switch; the liquid metal heat exchange assembly comprises a direct current converter valve body, an insulating heat conduction layer, an insulating leather tube and liquid metal, wherein the insulating heat conduction layer is wrapped on the periphery of the direct current converter valve body, the inner wall of the insulating heat conduction layer is in contact with the outer wall of the direct current converter valve body, the insulating leather tube is wrapped on the periphery of the insulating heat conduction layer, and the liquid metal is filled in a gap between the insulating leather tube and the insulating heat conduction layer; the pulse excitation assembly comprises a magnetic pole, a pulse transformer, a tap, a PWM (pulse width modulation) controller, a secondary pulse winding and an iron core; the direct current electric field switch is in contact with the liquid metal, the pulse transformer and the tap are wound at one end of the iron core, the secondary pulse winding is wound at the other end of the iron core, the tap is connected with the direct current electric field switch through a wire, the secondary pulse winding is connected with the magnetic pole through a wire, and the PWM controller is sequentially and electrically connected with the pulse transformer, the tap and the secondary pulse winding. The invention adopts the PWM pulse width modulation controller to control the heat dissipation of the liquid metal, and the PWM pulse width modulation controller controls the state parameters such as the flow rate, the state, the efficiency and the like of the liquid metal in the direct current converter valve by controlling the duration time, the pulse duty ratio and the like of the low-power pulse waveform. In addition, the pulse excitation device adopted by the direct current converter valve is small in size, is beneficial to saving cost, and has the advantages of high flexibility, high efficiency, small size, low power consumption and long service life.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a dc converter valve with a pulse excitation device according to an embodiment of the present invention.
The symbols represent:
the device comprises a 1-liquid metal heat exchange component, a 2-pulse excitation component, a 3-direct current electric field switch, an 11-direct current converter valve body, a 12-insulating heat conducting layer, a 13-insulating leather hose, 14-liquid metal, 21-magnetic poles, 22-pulse transformers, 23-PWM pulse width modulation controllers, 24-secondary pulse windings, 25-taps and 26-iron cores.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.
Fig. 1 is a schematic structural diagram of a dc converter valve with a pulse excitation device according to an embodiment of the present invention.
The direct current converter valve with the pulse excitation device in fig. 1 comprises a liquid metal heat exchange assembly 1, a pulse excitation assembly 2 and a direct current electric field switch 3, wherein the liquid metal heat exchange assembly 1 and the pulse excitation assembly 2 are connected through the direct current electric field switch 3. The liquid metal heat exchange assembly 1 comprises a direct current converter valve body 11, an insulating heat conducting layer 12, an insulating leather tube 13 and liquid metal 14, wherein the insulating heat conducting layer 12 is wrapped on the periphery of the direct current converter valve body 11, the inner wall of the insulating heat conducting layer 12 is in contact with the outer wall of the direct current converter valve body 11, the insulating leather tube 13 is wrapped on the periphery of the insulating heat conducting layer 12, and the liquid metal 14 is filled in a gap between the insulating leather tube 13 and the insulating heat conducting layer 12. The structures of the direct current converter valve body 11, the insulating heat conducting layer 12, the liquid metal 14 and the insulating leather hose 13 are arranged in sequence from outside to inside, so that heat generated by the direct current converter valve body 11 is transmitted to the liquid metal 14 in the insulating leather hose 13 through the insulating heat conducting layer 12, and the heat of the direct current converter valve body 11 is taken away through the flow of the liquid metal 14, and the heat dissipation purpose is achieved. The insulating and heat conducting layer 12 not only ensures that the insulating and heat conducting layer is in insulating contact with the direct current converter valve, but also can fully transfer heat of the direct current converter valve, in the embodiment, the insulating and heat conducting layer 12 adopts ceramic silica gel, the ceramic silica gel contains various holes, and when the insulating and heat conducting layer is doped with a semiconductor, the holes in the ceramic silica gel can absorb electrons, so that the ceramic silica gel has a good antistatic function, and finally, the isolation of two charged bodies of the direct current converter valve body 11 and the liquid metal 14 is realized.
The pulse excitation assembly 2 comprises a magnetic pole 21, a pulse transformer 22, a tap 25, a PWM (pulse width modulation) controller 23, a secondary pulse winding 24 and an iron core 26; the direct current electric field switch 3 is in contact with the liquid metal 14, the pulse transformer 22 and the tap 25 are wound at one end of the iron core 26, the secondary pulse winding 24 is wound at the other end of the iron core 26, the tap 25 is connected with the direct current electric field switch 3 through a wire, the secondary pulse winding 24 is connected with the magnetic pole 21 through a wire, and the PWM pulse width modulation controller 23 is electrically connected with the pulse transformer 22, the tap 25 and the secondary pulse winding 24 in sequence. The direct current electric field switch 3 controls the pulse excitation assembly 2 to supply current, and the liquid metal 14 moves under the action of a magnetic field, so that heat generated by the direct current converter valve body 11 is taken away. The PWM pulse width modulation controller 23 can control the pulse sent by the pulse transformer 22, specifically, the PWM pulse width modulation controller 23 can control the positive and negative polarities of the pulse, the duration of the pulse, the response time of the pulse, the current waveform, the amplitude intensity, the duty ratio, so as to more flexibly control the flow rate, the state, the efficiency and other state parameters of the liquid metal 14 in the dc converter valve, and better realize the heat dissipation function of the liquid metal 14 on the valve body 11 of the dc converter valve. In the embodiment of the invention, the iron core 26 is a high-permeability iron core, and the high permeability of the iron core is beneficial to the propagation of a magnetic field, so that the pulse excitation assembly 2 is beneficial to realizing flexible control of the flow velocity of the liquid metal 14.
When the direct current converter valve works normally, a lot of heat can be generated, so that the direct current converter valve body 11 heats very seriously, and the heat of the direct current converter valve body 11 is transferred to the liquid metal 14 through ceramic silica gel. The magnetic pole 21 in the pulse excitation assembly 2 generates a magnetic field, and the secondary pulse winding 24 is connected with the magnetic pole 21 through a wire; the liquid metal 14, the direct current field switch 3, the pulse transformer 22 and the tap 25 form a closed loop. According to the electromagnetic induction principle, when the tap 25 of the pulse transformer 22 provides a current direction and the secondary pulse winding 24 provides a magnetic field direction, the liquid metal 14 flows along the inside of the insulating leather hose 13 to take away the heat of the valve body 11 of the direct current converter valve. The pulse transformer 22 is controlled by the PWM controller 23, so that the positive and negative polarities of the pulses output by the pulse transformer 22 can be changed, and the positive and negative polarities of the dc electric field switch 3 are changed, and finally the flow direction of the liquid metal 14 is changed. The PWM controller 23 may also control the secondary pulse winding 24 to change the polarity of the secondary pulse winding 24, thereby changing the polarity of the magnetic pole 21 and ultimately the flow direction of the liquid metal 14.
The PWM controller 23 may also control the pulse waveform duration of the pulse transformer 22, so as to change the flow rate of the liquid metal 14, where the flow rate of the liquid metal 14 is very important for its heat dissipation effect, and in order to better control the flow rate of the liquid metal 14, in this embodiment of the present invention, the PWM controller 23 uses a linear high-performance current mode controller, and a linear circuit in the linear high-performance current mode controller can effectively remove the peak in the feedback signal, thereby improving the signal stability of the system, avoiding the harmonic vibration that may be generated when the PWM controller 23 outputs at a high duty ratio, so that the flow rate fluctuation of the liquid metal 14 is relatively stable, and is more beneficial to the liquid metal 14 taking away the heat of the dc converter valve body 11.
In addition, the PWM controller 23 may further control the pulse current waveform, amplitude intensity, duty ratio of the pulse transformer 22, so as to flexibly control the state, efficiency, and other characteristic parameters of the liquid metal 14, so that the liquid metal 14 plays a better role in heat dissipation of the dc converter valve 11.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (5)
1. A dc converter valve with a pulse excitation device, comprising: the liquid metal heat exchange assembly (1), the pulse excitation assembly (2) and the direct current electric field switch (3), wherein the liquid metal heat exchange assembly (1) and the pulse excitation assembly (2) are connected through the direct current electric field switch (3);
the liquid metal heat exchange assembly (1) comprises a direct current converter valve body (11), an insulating heat conducting layer (12), an insulating leather tube (13) and liquid metal (14), wherein the insulating heat conducting layer (12) is wrapped on the periphery of the direct current converter valve body (11), the inner wall of the insulating heat conducting layer (12) is in contact with the outer wall of the direct current converter valve body (11), the insulating leather tube (13) is wrapped on the periphery of the insulating heat conducting layer (11), and the liquid metal (14) is filled in a gap between the insulating leather tube (13) and the insulating heat conducting layer (12);
the pulse excitation assembly (2) comprises a magnetic pole (21), a pulse transformer (22), a tap (25), a PWM (pulse width modulation) controller (23), a secondary pulse winding (24) and an iron core (26); the direct current electric field switch (3) is in contact with the liquid metal (14), a primary pulse winding and a tap (25) of the pulse transformer (22) are wound at one end of the iron core (26), a secondary pulse winding (24) is wound at the other end of the iron core (26), the tap (25) is connected with the direct current electric field switch (3) through a wire, the secondary pulse winding (24) is connected with the magnetic pole (21) through a wire, and the PWM pulse width modulation controller (23) is sequentially and electrically connected with the primary pulse winding, the tap (25) and the secondary pulse winding (24) of the pulse transformer (22).
2. The direct current converter valve with pulse excitation device according to claim 1, characterized in that the insulating and heat conducting layer (12) is ceramic silica gel.
3. The direct current converter valve with pulse excitation arrangement according to claim 1, characterized in that the core (26) is a high permeability core.
4. The direct current converter valve with pulse excitation device according to claim 1, characterized in that the PWM pulse width modulation controller (23) is a linear high performance current mode controller.
5. The direct current converter valve with pulse excitation device according to claim 1, characterized in that the liquid metal (14) is a gallium indium alloy liquid metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611024180.2A CN106533131B (en) | 2016-11-18 | 2016-11-18 | DC converter valve with pulse excitation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611024180.2A CN106533131B (en) | 2016-11-18 | 2016-11-18 | DC converter valve with pulse excitation device |
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| CN106533131A CN106533131A (en) | 2017-03-22 |
| CN106533131B true CN106533131B (en) | 2023-07-14 |
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| CN201611024180.2A Active CN106533131B (en) | 2016-11-18 | 2016-11-18 | DC converter valve with pulse excitation device |
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Families Citing this family (1)
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| CN109104102A (en) * | 2018-08-16 | 2018-12-28 | 全球能源互联网研究院有限公司 | The solution of high pressure direct current valve heap liquid metal circulating cooling system electric field breakdown |
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