CN109412429B - Damping structure of high-voltage direct-current bypass switch loop of extra-high voltage converter station - Google Patents
Damping structure of high-voltage direct-current bypass switch loop of extra-high voltage converter station Download PDFInfo
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- CN109412429B CN109412429B CN201811323299.9A CN201811323299A CN109412429B CN 109412429 B CN109412429 B CN 109412429B CN 201811323299 A CN201811323299 A CN 201811323299A CN 109412429 B CN109412429 B CN 109412429B
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- bypass switch
- voltage direct
- current bypass
- transition
- high voltage
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- 238000013016 damping Methods 0.000 title claims abstract description 27
- 230000007704 transition Effects 0.000 claims abstract description 84
- 239000012212 insulator Substances 0.000 claims abstract description 56
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 41
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000005684 electric field Effects 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 6
- 239000010931 gold Substances 0.000 description 6
- 229910052737 gold Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 101000821981 Homo sapiens Sarcoma antigen 1 Proteins 0.000 description 2
- 102100021466 Sarcoma antigen 1 Human genes 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Insulators (AREA)
Abstract
The invention provides a damping structure of a high-voltage direct-current bypass switch loop of an extra-high voltage converter station, which comprises a first pipe nut, a transition support insulator, a first cross aluminum twisted ring fitting and a high-voltage direct-current bypass switch, wherein the first pipe nut is supported by the first support insulator, the transition support insulator is arranged between the first support insulator and the high-voltage direct-current bypass switch, a conductive connection structure is formed between one end of the first cross aluminum twisted ring fitting and the high-voltage direct-current bypass switch, a conductive connection structure is formed between the other end of the first cross aluminum twisted ring fitting and the first pipe nut by the transition pipe nut, and the transition pipe nut is supported by the first support insulator and the transition support insulator. The invention can well meet the requirements of the position displacement and the electrical connection of the power equipment of the high-voltage direct-current bypass switch loop under the earthquake working condition, thereby effectively improving the earthquake resistance of the high-voltage direct-current bypass switch body and the connecting loop thereof.
Description
Technical Field
The invention relates to the field of damping design of a high-voltage direct-current bypass switch loop of an extra-high voltage converter station, in particular to a damping structure of the high-voltage direct-current bypass switch loop of the extra-high voltage converter station, which is suitable for areas with high earthquake intensity.
Background
The extra-high voltage direct current transmission technology has the advantages of long transmission distance, large capacity, low loss and the like, and has been widely applied to the power grid system in China.
However, the power equipment is susceptible to serious damage in an earthquake, mainly: not only does an earthquake bring additional mechanical force to the electrical equipment causing damage to the electrical equipment, but an earthquake may cause an offset in the top of the electrical equipment, such that the air gap between the various electrical equipment may be reduced to dangerous levels, even inducing flashovers. Therefore, the anti-seismic performance of the power equipment is directly related to the safe operation of the power system, and important research is required.
In an extra-high voltage converter station, a high-voltage direct current bypass switch is of a T-shaped strut type structure, has high equipment and high gravity center, and belongs to typical 'head heavy and foot light' equipment. Under the earthquake working condition, the body displacement of the high-voltage direct-current bypass switch is larger, and the two connecting side parts of the high-voltage direct-current bypass switch loop can receive extra mechanical force, so that deformation damage is easily caused to the equipment connecting parts on the two sides of the high-voltage direct-current bypass switch loop, and even electrical connection is disconnected, thereby causing power failure accidents.
Disclosure of Invention
The invention aims to solve the technical problems that: aiming at the problems existing in the prior art, the damping structure of the high-voltage direct-current bypass switch loop of the extra-high voltage converter station is provided, and the anti-seismic performance of the high-voltage direct-current bypass switch loop is improved.
The technical problems to be solved by the invention are realized by adopting the following technical scheme: the utility model provides an extra-high voltage current converting station high voltage direct current bypass switch return circuit shock-absorbing structure, includes first tub of female, high voltage direct current bypass switch, transition tub of female, transition pillar insulator and first cross aluminium hank ring gold utensil, first tub of female support through first pillar insulator, transition pillar insulator set up between first pillar insulator and high voltage direct current bypass switch, form conductive connection structure between one end and the high voltage direct current bypass switch of first cross aluminium hank ring gold utensil, form conductive connection structure through the transition tub of female between the other end and the first tub of female, transition tub of female support through first pillar insulator, transition pillar insulator.
Preferably, the transition pipe nut is a straight pipe nut with a straight-line structure.
Preferably, the transition pipe nut is a 90-degree inclined pipe nut comprising two right-angle structures, and the opening directions of the two right-angle structures are opposite.
Preferably, the transition pipe nut is a smooth inclined pipe nut comprising a first arc-shaped transition part and a second arc-shaped transition part, and the opening directions of the first arc-shaped transition part and the second arc-shaped transition part are opposite.
Preferably, a protection angle formed between a turning center of the first arc-shaped transition portion and a center line of the first post insulator is less than or equal to 8 °.
Preferably, a protection angle formed between a turning center of the second arc-shaped transition portion and a center line of the transition post insulator is less than or equal to 8 °.
Preferably, the high-voltage direct-current bypass switch further comprises a second post insulator and a second pipe nut, the second pipe nut is supported by the second post insulator, and a conductive connection structure is formed between the high-voltage direct-current bypass switch and the second pipe nut by a second crossed aluminum stranded ring fitting.
Preferably, one end of the second cross aluminum stranded ring fitting is fixedly connected with the third equalizing ring.
Preferably, the high-voltage direct current bypass switch is fixedly arranged on the damping mechanism, the damping mechanism comprises a spring damper and a steel wire rope damper, two opposite ends of the spring damper are respectively connected with the connecting seat and the base, two opposite ends of the steel wire rope damper are respectively connected with the fixed base and the base, and the fixed base is connected with the high-voltage direct current bypass switch through a high-voltage direct current bypass switch bracket.
Preferably, the top of the transition post insulator is fixedly connected with a second equalizing ring.
Compared with the prior art, the invention has the beneficial effects that: through setting up transition pillar insulator and first alternately aluminium hank ring gold utensil between first pillar insulator and high voltage direct current bypass switch, support transition pipe is female through first pillar insulator, transition pillar insulator, and make between first alternately aluminium hank ring gold utensil and the first tub of female conductive connection structure that forms through the transition pipe, thereby can make full use of alternately aluminium hank ring gold utensil realize the shock attenuation of high voltage direct current bypass switch return circuit, and guarantee stability, the reliability of high voltage direct current bypass switch return circuit, the displacement requirement and the electrical connection requirement between the power equipment under the earthquake operating mode have been satisfied well, the shock resistance of high voltage direct current bypass switch body and connecting circuit has been improved effectively, and then the damage of power equipment has been avoided, and has good economic benefits.
Drawings
Fig. 1 is a schematic diagram of the structure of the damping structure of the high-voltage dc bypass switch loop of the extra-high voltage converter station according to the present invention (embodiment 1).
Fig. 2 is a schematic structural diagram of a damping structure of a high-voltage dc bypass switch loop of an extra-high voltage converter station according to the present invention (embodiment 2).
Fig. 3 is a schematic structural diagram of a damping structure of a high-voltage dc bypass switch loop of an extra-high voltage converter station according to the present invention (embodiment 3).
Fig. 4 is a schematic view of a three-dimensional configuration of the damping mechanism.
Fig. 5 is a front view of the damping mechanism.
The marks in the figure: 1-a first pipe nut, 2-a first equalizing ring, 3-a first post insulator, 4-a transition pipe nut, 5-a transition post insulator, 6-a second equalizing ring, 7-a first cross aluminum twisted ring fitting, 8-a high-voltage direct current bypass switch, 9-a damping mechanism, 10-a second cross aluminum twisted ring fitting, the high-voltage direct-current bypass switch comprises an 11-third equalizing ring, a 12-second post insulator, a 13-second pipe nut, a 14-light CT, a 41-first arc transition part, a 42-second arc transition part, a 90-high-voltage direct-current bypass switch support, a 91-fixed base, a 92-connecting base, a 93-spring damper, a 94-base and a 95-steel wire rope damper.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Embodiment 1
The damping structure for the extra-high voltage direct current bypass switch loop of the extra-high voltage converter station shown in fig. 1 specifically comprises a first pipe nut 1, a first post insulator 3, a transition pipe nut 4, a transition post insulator 5, a first cross aluminum twisted ring fitting 7, a high voltage direct current bypass switch 8, a damping mechanism 9, a second cross aluminum twisted ring fitting 10, a second post insulator 12, a second pipe nut 13 and an optical CT14, wherein the first pipe nut 1 is supported through the first post insulator 3, the ground clearance of the first pipe nut 1 is larger than the ground clearance of the first cross aluminum twisted ring fitting 7, the second pipe nut 13 is supported through the second post insulator 12, the transition post insulator 5 is arranged between the first post insulator 3 and the high voltage direct current bypass switch 8, and the transition pipe nut 4 is supported through the first post insulator 3 and the transition post insulator 5. Wherein the transition pipe nut 4 adopts a straight pipe nut with a straight-line structure.
The high-voltage direct current bypass switch comprises a first cross aluminum stranded ring fitting 7, a high-voltage direct current bypass switch 8, a transition pipe bus 4, a high-voltage direct current bypass switch 8, a second cross aluminum stranded ring fitting 10, a light CT14 and a second pipe bus 13, wherein a conductive connection structure is formed between one end of the first cross aluminum stranded ring fitting 7 and the high-voltage direct current bypass switch 8, a conductive connection structure is formed between the other end of the first cross aluminum stranded ring fitting 7 and the first pipe bus 1, and a conductive connection structure is formed between the high-voltage direct current bypass switch 8 and the second pipe bus 13. In order to balance the electric field intensity on the surface of the first tubular busbar 1 and optimize the electric field distribution, a first equalizing ring 2 may be fixedly connected to the top of the first post insulator 3. Likewise, in order to equalize the surface electric field intensities of the transition pipe nut 4 and the first cross aluminum twisted ring hardware 7 and optimize the electric field distribution, a second equalizing ring 6 may be fixedly connected to the top of the transition post insulator 5. In addition, in order to equalize the surface electric field intensity of the second cross aluminum twisted ring hardware 10 and optimize the electric field distribution, a third equalizing ring 11 may be fixedly connected to one end of the second cross aluminum twisted ring hardware 10.
In order to further improve the anti-vibration performance of the body of the hvdc bypass switch 8, the hvdc bypass switch 8 can be fixedly connected with a hvdc bypass switch bracket 90, the hvdc bypass switch bracket 90 is preferably a lattice type bracket, and a damping mechanism 9 is fixedly arranged at the bottom of the hvdc bypass switch bracket 90. As shown in fig. 4 and 5, the damping mechanism 9 mainly includes a spring damper 93 and a wire rope damper 95, opposite ends of the spring damper 93 are respectively connected with a connection base 92 and a base 94, opposite ends of the wire rope damper 95 are respectively connected with a fixed base 91 and a base 94, and the fixed base 91 is connected with the hvth bypass switch 8 through a hvth bypass switch bracket 90. The spring damper 93 and the steel wire rope damper 95 attenuate and consume earthquake mechanical force in the process of stress pulling and pressing, so that the mechanical stress suffered by the high-voltage direct-current bypass switch 8 body during an earthquake can be reduced, and the high-voltage direct-current bypass switch 8 body is protected from being damaged by the earthquake.
Because the first cross aluminum stranded wire hardware fitting 7 and the second cross aluminum stranded wire hardware fitting 10 are electrically connected by adopting two aluminum stranded wire semi-rings in the horizontal direction, equalizing rings can be arranged at two ends of the first cross aluminum stranded wire hardware fitting and used for equalizing the electric field intensity of the conductor surface, electric field distribution is optimized by adopting a cross aluminum stranded wire mode at the pipe bus end, the length of the straightened wires of the cross aluminum stranded wire hardware fitting is larger than the relative displacement between two electric devices connected with the wires of the cross aluminum stranded wire hardware fitting by arranging the reasonable outer diameters of the aluminum stranded wire semi-rings, the stability of the hardware fitting can be well realized while the large-displacement telescoping amount is realized, the connecting conductors between the high-voltage direct current bypass switch 8 and the transition post insulator 5 and between the high-voltage direct current bypass switch 8 and the second post insulator 12 are provided with larger redundancy, so that the electric devices at two sides of the first cross aluminum stranded wire hardware fitting 7 and the second cross aluminum stranded wire hardware fitting 10 can be effectively prevented from being damaged due to the extra earthquake mechanical force, the whole shock resistance of the high-voltage direct current bypass switch 8 body and the loop connection structure are improved, and the safety and reliability of the high-voltage bypass switch are guaranteed. In addition, through setting up transition post insulator 5, both can solve the hidden danger of connecting conductor overlength, also can reduce the difference in height between power equipment simultaneously, guarantee the live distance of safety between the power equipment, also be convenient for carry out electrical connection through first alternately aluminium hank ring gold utensil 7 between transition post insulator 5 and the high voltage direct current bypass switch 8.
It should be noted that: in embodiment 1, although the safety live distance requirements between the power facilities can be satisfied, the transition pipe 4 and the second equalizing ring 6 therein are likely to collide with each other during an earthquake.
Embodiment 2
Compared with the embodiment 1, the transition pipe nut 4 is a 90-degree inclined pipe nut comprising two right-angle structures, and the opening directions of the two right-angle structures are opposite, as shown in fig. 2. Otherwise, the same as in embodiment 1.
In embodiment 2, the transition pipe is connected to the bottom of the first equalizing ring 2 and the second equalizing ring 6, respectively, and the transition pipe is not collided with the adjacent power equipment, but the tip discharge at the 90 ° corner of the transition pipe is serious, the equalizing shielding measures are required, and the equalizing shielding measures are not convenient to fix at the 90 ° corner.
Embodiment 3
Compared with embodiment 1, the transition pipe nut 4 is a smooth inclined pipe nut including a first arc-shaped transition portion 41 and a second arc-shaped transition portion 42, and the opening directions of the first arc-shaped transition portion 41 and the second arc-shaped transition portion 42 are opposite, as shown in fig. 3. Otherwise, the same as in embodiment 1.
Further, in order to better prevent the tip discharge phenomenon at the turning part of the transition pipe nut 4, the top of the first pillar insulator 3 may be fixedly connected with the first equalizing ring 2, the top of the transition pillar insulator 5 may be fixedly connected with the second equalizing ring 6, in addition, a protection angle α formed between the turning center of the first arc-shaped transition part 41 and the center line of the first pillar insulator 3 is less than or equal to 8 °, and a protection angle β formed between the turning center of the second arc-shaped transition part 42 and the center line of the transition pillar insulator 5 is less than or equal to 8 °.
In this embodiment 3, the transition pipe is connected to the bottom of the first equalizing ring 2 and the second equalizing ring 6 respectively, and the transition pipe is provided with the first arc transition portion 41 and the second arc transition portion 42, so that the transition pipe is not collided with the adjacent power equipment due to the smooth transition structure, and the field intensity distribution at the corner of the transition pipe is uniform and is not easy to generate tip discharge. In addition, the corner of the transition pipe bus 4 is installed as close to the first post insulator 3 and the transition post insulator 5 as possible, and the corner of the transition pipe bus 4 is placed in the protection range of the first equalizing ring 2 and the second equalizing ring 6 as much as possible, so that no additional equalizing shielding measures are needed, and the construction cost is saved. The high-voltage direct-current bypass switch circuit has the advantages that the integral connection scheme of the high-voltage direct-current bypass switch circuit is stable and reliable, the shock resistance of the high-voltage direct-current bypass switch body and the connection circuit is improved, the dual requirements of electric and shock resistance are met, the earthquake damage of electric facilities is avoided, and good economic benefits are achieved.
The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The utility model provides an extra-high voltage current conversion station high voltage direct current bypass switch return circuit shock-absorbing structure, includes first tub of female (1) and high voltage direct current bypass switch (8), first tub of female (1) supports its characterized in that through first pillar insulator (3): the high-voltage direct current bypass switch is characterized by further comprising a transition pipe nut (4), a transition support post insulator (5) and a first cross aluminum stranded ring fitting (7), wherein the transition support post insulator (5) is arranged between the first support post insulator (3) and the high-voltage direct current bypass switch (8), a conductive connection structure is formed between one end of the first cross aluminum stranded ring fitting (7) and the high-voltage direct current bypass switch (8), a conductive connection structure is formed between the other end of the first cross aluminum stranded ring fitting and the first pipe nut (1) through the transition pipe nut (4), and the transition pipe nut (4) is supported through the first support post insulator (3) and the transition support post insulator (5); the ground clearance of the first pipe bus (1) is larger than that of the first crossed aluminum twisted ring hardware (7);
the high-voltage direct-current bypass switch comprises a high-voltage direct-current bypass switch (8) and a first pipe nut (13), and is characterized by further comprising a second post insulator (12) and a second pipe nut (13), wherein the second pipe nut (13) is supported by the second post insulator (12), and a conductive connection structure is formed between the high-voltage direct-current bypass switch (8) and the second pipe nut (13) through a second crossed aluminum twisted ring fitting (10); the lengths of the straightened wires of the first cross aluminum stranded ring hardware fitting (7) and the second cross aluminum stranded ring hardware fitting (10) are larger than the relative displacement between the two side power devices connected with the straightened wires;
the high-voltage direct current bypass switch (8) is fixedly arranged on the damping mechanism (9), the damping mechanism (9) comprises a spring damper (93) and a steel wire rope damper (95), the opposite ends of the spring damper (93) are respectively connected with a connecting seat (92) and a base (94), the opposite ends of the steel wire rope damper (95) are respectively connected with a fixed base (91) and the base (94), and the fixed base (91) is connected with the high-voltage direct current bypass switch (8) through a high-voltage direct current bypass switch bracket (90).
2. The extra-high voltage converter station high voltage direct current bypass switch loop damping structure according to claim 1, wherein: the transition pipe nut (4) is a straight pipe nut with a straight-line structure.
3. The extra-high voltage converter station high voltage direct current bypass switch loop damping structure according to claim 1, wherein: the transition pipe nut (4) is a 90-degree inclined pipe nut comprising two right-angle structures, and the opening directions of the two right-angle structures are opposite.
4. The extra-high voltage converter station high voltage direct current bypass switch loop damping structure according to claim 1, wherein: the transition pipe nut (4) is a smooth inclined pipe nut comprising a first arc-shaped transition part (41) and a second arc-shaped transition part (42), and the opening directions of the first arc-shaped transition part (41) and the second arc-shaped transition part (42) are opposite.
5. The extra-high voltage converter station high voltage direct current bypass switch loop damping structure according to claim 4, wherein: the protection angle (alpha) formed between the turning center of the first arc-shaped transition part (41) and the central line of the first pillar insulator (3) is less than or equal to 8 degrees.
6. The extra-high voltage converter station high voltage direct current bypass switch loop damping structure according to claim 4, wherein: the protection angle (beta) formed between the turning center of the second arc-shaped transition part (42) and the central line of the transition post insulator (5) is less than or equal to 8 degrees.
7. The extra-high voltage converter station high voltage direct current bypass switch loop damping structure according to claim 1, wherein: one end of the second crossed aluminum stranded ring fitting (10) is fixedly connected with the third equalizing ring (11).
8. The extra-high voltage converter station high voltage dc bypass switch loop damping structure according to any one of claims 1-6, wherein: the top of the transition post insulator (5) is fixedly connected with a second equalizing ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323299.9A CN109412429B (en) | 2018-11-08 | 2018-11-08 | Damping structure of high-voltage direct-current bypass switch loop of extra-high voltage converter station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323299.9A CN109412429B (en) | 2018-11-08 | 2018-11-08 | Damping structure of high-voltage direct-current bypass switch loop of extra-high voltage converter station |
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| Publication Number | Publication Date |
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| CN109412429A CN109412429A (en) | 2019-03-01 |
| CN109412429B true CN109412429B (en) | 2024-04-05 |
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| CN201811323299.9A Active CN109412429B (en) | 2018-11-08 | 2018-11-08 | Damping structure of high-voltage direct-current bypass switch loop of extra-high voltage converter station |
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| CN109412429A (en) | 2019-03-01 |
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