CN112152424B - Compact air-cooled static frequency converter power cabinet - Google Patents
Compact air-cooled static frequency converter power cabinet Download PDFInfo
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- CN112152424B CN112152424B CN202010797414.7A CN202010797414A CN112152424B CN 112152424 B CN112152424 B CN 112152424B CN 202010797414 A CN202010797414 A CN 202010797414A CN 112152424 B CN112152424 B CN 112152424B
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- thyristor valve
- valve string
- cabinet body
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- fan
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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
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- 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
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
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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
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a compact air-cooled static frequency converter power cabinet, which comprises a cabinet body, wherein a mixed compression joint type thyristor valve string, a fan, an air duct and an AC/DC copper bar are arranged in the cabinet body, and the thyristor valve string is manufactured by mixing and compressing thyristors of a machine and a network bridge phase into one valve string according to phase sequence; the thyristor valve string is vertically arranged on the right front side of the cabinet body, the fan is arranged on the left side of the thyristor valve string, and the fan is connected with the thyristor valve string through the air duct; the alternating current-direct current copper bar is connected with the thyristor valve string. The invention solves the problems of large volume, complex wiring of a main loop and difficult maintenance of the conventional static frequency converter power cabinet.
Description
Technical Field
The invention relates to a compact air-cooled static frequency converter power cabinet, and belongs to the technical field of cabinet body design.
Background
The static frequency converter is a frequency converter composed of power devices, a direct current reactor and other equipment, controls the power frequency by controlling the on-off of a semiconductor power unit, can stably drag a generator rotor from a static state to a rated rotating speed, and is mainly applied to the fields of gas power generation and hydroelectric power generation at present.
Conventional stationary frequency converter systems are usually composed of a control unit, a network bridge unit, a bridge unit, reactors and switches, wherein the network bridge and the bridge unit are power units. Existing static frequency converter manufacturers differentiate thyristors according to bridges, press-fit the bridge-side thyristor and the bridge-side thyristor respectively, and place the bridge-side thyristor and the bridge-side thyristor in one cabinet body or two cabinet bodies. The press-fitting structure causes the complex wiring of a main loop, the large size of the cabinet body has low space utilization rate, the front and back doors are needed for maintaining the devices in the cabinet, and the field maintenance is difficult.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a compact air-cooled static frequency converter power cabinet, which solves the problems of large volume, complex wiring of a main circuit and difficult maintenance of the conventional static frequency converter power cabinet.
The invention specifically adopts the following technical scheme: a compact air-cooled static frequency converter power cabinet is characterized by comprising a cabinet body, wherein a hybrid compression joint type thyristor valve string, a fan, an air duct and an AC/DC copper bar are arranged in the cabinet body, and the thyristor valve string is manufactured by hybrid compression joint of thyristors of a machine phase and a network bridge phase into a valve string according to the phase sequence; the thyristor valve string is vertically arranged on the right front side of the cabinet body, the fan is arranged on the left side of the thyristor valve string, and the fan is connected with the thyristor valve string through the air duct; the alternating current-direct current copper bar is connected with the thyristor valve string.
As a preferred embodiment, the cabinet body is provided with two installation access doors in front of the thyristor valve string, the front left side sealing plate of the cabinet body is provided with a fan air inlet, the right rear side sealing plate of the cabinet body is provided with a heat radiation air outlet, and the left rear side of the cabinet body is provided with a detachable sealing plate for accommodating the inlet of an access passage in the cabinet.
In a preferred embodiment, the thyristor valve string comprises a thyristor, a radiator, a pressure plate, an insulating pull rod and an RCT assembly; the thyristor is arranged in the center of the radiator and is connected with the insulating pull rods around through the pressing plates at the upper end and the lower end; an insulating cushion block, a disc spring shaft sleeve, a disc spring ejector rod and a locking nut are sequentially connected between the pressing plate and the radiator in a matched manner; the RCT assemblies are mounted in mating relation to the corresponding heat sinks.
As a preferred embodiment, the outside of fan is provided with the spiral case that holds the wind chamber, the preceding air inlet of fan, the side air-out of fan, and the fan is two of vertical stack.
As a better embodiment, the air duct is respectively connected with the fan and the radiator through epoxy plates, and a plurality of thyristor valve strings are connected through the epoxy plates to form a closed air duct.
As a better embodiment, the air duct is divided into an upper layer and a lower layer, the two layers of air ducts are separated by a partition plate and respectively correspond to two vertically stacked fans; and two air pressure relays are arranged at the air duct outlet and are responsible for monitoring the air pressure at the radiating air outlet.
As a preferred embodiment, the ac/dc copper bar is installed on a wiring row extending from the heat sink at the back of the thyristor valve string, an ac inlet row is disposed at the lower portion of the back of the thyristor valve string, and an external cable is led in from a cable hole at the bottom of the cabinet and connected to the ac inlet row.
As a preferred embodiment, the alternating current-direct current copper bar comprises an alternating current copper bar positioned at the top and a direct current copper bar positioned at the bottom, and the alternating current copper bar is connected with the switching cabinet from the right side of the cabinet body through a first wall bushing outgoing line; and the direct-current copper bar is connected with the side of the reactor through two bus bars from the bottom through a second wall bushing.
As a better embodiment, the bottom of the thyristor valve string is fixed on a base cross beam of the cabinet body, and the top of the thyristor valve string is connected and fixed with a side beam of the cabinet body through a top cross beam; the fan is arranged on the left side of the thyristor valve string in a superposed manner, the upper end and the lower end of the fan are respectively fixed on the cabinet body through a first cross beam and a base cross beam,
as a better embodiment, a fuse protector, a lightning protector and a voltage transformer are also arranged on the left side of the cabinet body; the fuse protector, the lightning protection device and the voltage transformer are installed on the back of the fan in a centralized mode and are fixed on the side beam of the cabinet body through the bottom cross beam.
The invention achieves the following beneficial effects: firstly, the invention adopts a novel mixed crimping type thyristor valve string, so that the main loop wiring is simpler, the power units of the machine and the network bridge are conveniently and collectively arranged in a cabinet body, and the volume of the power cabinet is greatly reduced. Secondly, the three-phase hybrid crimping type thyristor valves are vertically arranged on the inner side of the front door in series, an overhaul channel is arranged behind the front door, front maintenance can be achieved, a door does not need to be opened behind the cabinet, and overhaul and maintenance space is reduced. Thirdly, the two mutually independent closed air channels are adopted, so that the heat dissipation efficiency is improved, and the air channels are spliced by the epoxy plates, so that the maintenance and the replacement are convenient. Fourthly, the number of thyristors in the thyristor valve string can be conveniently adjusted, and different pulsation working conditions can be met.
Drawings
FIG. 1 is a front side perspective view of a compact air-cooled stationary frequency converter power cabinet of the present invention;
FIG. 2 is a rear perspective view of a compact air-cooled stationary frequency converter power cabinet of the present invention;
FIG. 3 is a front cut-away schematic view of a compact air-cooled stationary frequency converter power cabinet of the present invention;
FIG. 4 is an internal structural view of a compact air-cooled stationary frequency converter power cabinet of the present invention;
FIG. 5 is a rear cut-away schematic view of a compact air-cooled stationary frequency converter power cabinet of the present invention;
fig. 6 is an enlarged schematic view of a thyristor valve string of a compact air-cooled static frequency converter power cabinet according to the present invention.
The meanings of the symbols in the figures: 0-cabinet, 1-installation access door, 2-fan air inlet, 3-detachable closing plate, 4-first wall bushing, 5-heat dissipation air outlet, 6-second wall bushing, 7-fan, 8-volute, 9-thyristor valve string, 10-wind pressure relay, 11-epoxy plate, 12-first beam, 13-cabinet side beam, 14-top beam, 15-partition plate, 16-base beam, 17-AC/DC copper bar, 18-lightning protector, 19-fuse, 20-voltage transformer, 21-bottom beam, 22-disc spring, 23-disc spring shaft sleeve, 24-insulating cushion block, 25-thyristor, 26-radiator, 27-pressing plate, 28-locking nut, 29-disc spring ejector rod, 30-RCT component, 31-insulating pull rod.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1: as shown in fig. 1 to 6, the invention provides a compact air-cooled static frequency converter power cabinet, which comprises a cabinet body 0, three hybrid crimping thyristor valve strings 9, a fan 7, an air duct and an alternating current-direct current copper bar 17. The hybrid crimping type thyristor valve string 9 is vertically installed on the right front side of the cabinet body 0, the bottom of the hybrid crimping type thyristor valve string 9 is fixed on a base cross beam 16 of the cabinet body 0, and the top of the thyristor valve string 9 is connected and fixed with a side beam 13 of the cabinet body through a top cross beam 14. Two fans 7 are installed on the left side of the thyristor valve string 9 in a superposed mode, the upper end and the lower end of each fan 7 are fixed through a first cross beam 12 and a base cross beam 16 respectively, an air cavity is in a volute 8 mode, and an air channel is in butt joint with the volute 8 of each fan after connecting radiators 26 in the thyristor valve string 9 with each other through an epoxy plate 11 to form a closed air channel. The alternating current-direct current copper bar 17 is installed on a wiring row extending out of a radiator 26 at the back of the hybrid crimping type thyristor valve string 9, an alternating current incoming line row is arranged at the lower back of the thyristor valve string 9, an external cable enters the alternating current incoming line from a cable hole at the bottom of the cabinet body 0, and the alternating current copper bar positioned at the top in the alternating current-direct current copper bar 17 is connected with the switching cabinet through a first wall bushing 4 outgoing line from the right side of the cabinet body 0; and the direct-current copper bar positioned at the bottom in the alternating-current and direct-current copper bars 17 is connected with the side of the reactor through two bus bars from the bottom through the outlet of the second wall bushing 6. Fuse 19, lightning protection device 18, voltage transformer 20 concentrate and install at the back of the left fan 7 of cabinet body 0, fix on cabinet body curb girder 13 through bottom crossbeam 21, and vertical the arranging from top to bottom can overhaul the maintenance through the access way.
As shown in fig. 1-2, two fan inlets 2 are arranged on the left sealing plate in front of the cabinet 0; two installation access doors 1 are arranged on the front right side of the cabinet body 0, and the mixed compression type thyristor valve string 9 is installed and maintained through the two installation access doors 1; the rear part of the left side of the cabinet body 0 is provided with a detachable sealing plate 3 which is an access passage inlet of the rear part in the cabinet body 1; the right side shrouding is opened with heat dissipation air outlet 5 behind the cabinet body 0, and hot-blast is discharged through this heat dissipation air outlet in the cabinet body 0.
As shown in fig. 6, the hybrid pressure-welding type thyristor valve string 9 is alternately pressed by using a radiator 26 and a thyristor 25, both ends of the hybrid pressure-welding type thyristor valve string are pressed by using a pressure plate 27 made of high-strength alloy through four insulating pull rods 31, and for insulation and looseness prevention, an insulating cushion block 24, a disc spring shaft sleeve 23, a disc spring 22, a disc spring ejector rod 29 and a locking nut 28 are arranged between the pressure plate 27 on the top of the thyristor valve string 9 and the radiator 26. The RCT assembly 30 functions to trigger the thyristor 25, and the RCT assembly 30 is mounted in close proximity to the thyristor 25 for ease of wiring.
As shown in fig. 3-4, the fan 7 and the volute 8 are fixed as a unit, and can be integrally drawn out from the front of the cabinet for replacement and maintenance. The heat dissipation air duct starts from the right side of the volute 8 of the fan 7, the volute 8 and the radiator 26 of the mixed compression joint type thyristor valve string 9 are connected through the epoxy plate 11 to form a closed air duct, the air duct is divided into an upper layer and a lower layer which respectively correspond to the upper fan 7 and the lower fan 7, and the two air ducts are separated by the insulating partition plate 15 to prevent the fans from being influenced by each other and improve the heat dissipation efficiency. Two wind pressure relays 10 are arranged at the outlet of the air duct and are responsible for monitoring the wind pressure at the heat dissipation air port 5.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A compact air-cooled static frequency converter power cabinet is characterized by comprising a cabinet body (0), wherein a mixed compression type thyristor valve string (9), a fan (7), an air duct and an AC/DC copper bar (17) are arranged in the cabinet body (0), and the thyristor valve string (9) is manufactured by mixing and compressing thyristors of one phase of a machine and a network bridge into one valve string according to the phase sequence; the thyristor valve string (9) is vertically arranged on the right front side of the cabinet body (0), the fan (7) is arranged on the left side of the thyristor valve string (9), and the fan (7) is connected with the thyristor valve string (9) through the air duct; the alternating current-direct current copper bar (17) is connected with the thyristor valve string (9);
the front of the thyristor valve string (9) of the cabinet body (0) is provided with two installation access doors (1), the front left side sealing plate of the cabinet body (0) is provided with a fan air inlet (2), the right rear side sealing plate of the cabinet body (0) is provided with a heat dissipation air outlet (5), and the rear of the left side of the cabinet body (0) is provided with a detachable sealing plate (3) for accommodating an inlet of an in-cabinet access channel;
the thyristor valve string (9) comprises a thyristor (25), a radiator (26), a pressing plate (27), an insulating pull rod (31) and an RCT assembly (30); the thyristor (25) is arranged at the center of the radiator (26) and is connected with the insulating pull rods (31) at the periphery through the pressing plates (27) at the upper end and the lower end in a compression joint manner; an insulating cushion block (24), a disc spring shaft sleeve (23), a disc spring (22), a disc spring ejector rod (29) and a locking nut (28) are sequentially connected between the pressure plate (27) and the radiator (26) in a matched manner; the RCT assemblies (30) are fittingly mounted on the corresponding heat sinks (26).
2. The compact air-cooled static frequency converter power cabinet according to claim 1, characterized in that a volute (8) for accommodating an air chamber is arranged outside the fan (7), the front of the fan (7) is used for supplying air, the side of the fan (7) is used for supplying air, and the fans (7) are vertically stacked.
3. The compact air-cooled static frequency converter power cabinet according to claim 1, wherein the air duct is connected with the fan (7) and the radiator (26) through epoxy plates (11), and a plurality of thyristor valve strings (9) are connected through epoxy plates (11) to form a closed air duct.
4. The compact air-cooled static frequency converter power cabinet according to claim 3, characterized in that the air duct is divided into an upper layer and a lower layer, the two layers of air ducts are separated by a partition plate (15) and respectively correspond to two vertically stacked fans (7); and two wind pressure relays (10) are arranged at the outlet of the air duct and are responsible for monitoring the wind pressure at the heat dissipation air outlet (5).
5. The compact type air-cooled static frequency converter power cabinet according to claim 1, characterized in that the ac/dc copper bar (17) is installed on a wiring bar extending from the heat sink (26) at the back of the thyristor valve string (9), an ac wiring bar is arranged at the lower back of the thyristor valve string (9), and external cables are led in from cable holes at the bottom of the cabinet body (0) and connected with the ac wiring bar.
6. The compact air-cooled static frequency converter power cabinet according to claim 5, characterized in that the AC/DC copper bar (17) comprises an AC copper bar at the top and a DC copper bar at the bottom, and the AC copper bar is connected with a switch cabinet through a first wall bushing (4) from the right side of the cabinet body (0); and the direct-current copper bar is connected with the side of the reactor through two bus bars from the bottom through a second wall bushing (6).
7. The compact air-cooled static frequency converter power cabinet according to claim 1, characterized in that the bottom of the thyristor valve string (9) is fixed on a base cross beam (16) of the cabinet body (0), and the top of the thyristor valve string (9) is connected and fixed with a cabinet side beam (13) of the cabinet body (0) through a top cross beam (14); the fan (7) is installed on the left side of the thyristor valve string (9) in a superposed mode, and the upper end and the lower end of the fan (7) are fixed on the cabinet body (0) through a first cross beam (12) and a base cross beam (16) respectively.
8. The compact air-cooled static frequency converter power cabinet according to claim 1, characterized in that a fuse (19), a lightning protector (18) and a voltage transformer (20) are further arranged on the left side of the cabinet body (0); the fuse protector (19), the lightning protection device (18) and the voltage transformer (20) are installed on the back of the fan (7) in a centralized mode and fixed on a cabinet side beam (13) of the cabinet body (0) through a bottom cross beam (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010797414.7A CN112152424B (en) | 2020-08-10 | 2020-08-10 | Compact air-cooled static frequency converter power cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010797414.7A CN112152424B (en) | 2020-08-10 | 2020-08-10 | Compact air-cooled static frequency converter power cabinet |
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| CN112152424A CN112152424A (en) | 2020-12-29 |
| CN112152424B true CN112152424B (en) | 2022-02-08 |
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| CN202010797414.7A Active CN112152424B (en) | 2020-08-10 | 2020-08-10 | Compact air-cooled static frequency converter power cabinet |
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| CN216851242U (en) * | 2021-11-19 | 2022-06-28 | 广东福德电子有限公司 | Compact type vehicle-mounted direct-current ice melting power supply |
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| CN101290931A (en) * | 2008-05-30 | 2008-10-22 | 中国电力科学研究院 | Self-cooled thyristor valve of high power and mounting vehicle |
| CN101667822A (en) * | 2009-09-29 | 2010-03-10 | 河北省电力研究院 | Solid state compound switch structure |
| CN201656484U (en) * | 2010-02-03 | 2010-11-24 | 中电普瑞科技有限公司 | Movable type container of static var compensator |
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| CN103630351A (en) * | 2013-12-10 | 2014-03-12 | 国家电网公司 | Disc spring crimping measuring tool for thyristor valve strings and IGBT (insulated gate bipolar transistor) valve strings |
| CN204615796U (en) * | 2015-05-28 | 2015-09-02 | 株洲变流技术国家工程研究中心有限公司 | A kind of Large Copacity Small-Sized Pulsed switching device |
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| Publication number | Publication date |
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| CN112152424A (en) | 2020-12-29 |
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Application publication date: 20201229 Assignee: Changzhou Wujin Hualian Electric Control Equipment Co.,Ltd. Assignor: NR ELECTRIC POWER ELECTRONICS Co.,Ltd.|NR ELECTRIC Co.,Ltd.|NR ENGINEERING Co.,Ltd. Contract record no.: X2023980034016 Denomination of invention: A compact air-cooled static frequency converter power cabinet Granted publication date: 20220208 License type: Common License Record date: 20230323 |
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