CN109546868A - A kind of cabinet-type direct current transportation converter valve - Google Patents
A kind of cabinet-type direct current transportation converter valve Download PDFInfo
- Publication number
- CN109546868A CN109546868A CN201811373836.0A CN201811373836A CN109546868A CN 109546868 A CN109546868 A CN 109546868A CN 201811373836 A CN201811373836 A CN 201811373836A CN 109546868 A CN109546868 A CN 109546868A
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- China
- Prior art keywords
- converter valve
- thyristor
- direct current
- cabinet body
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000013016 damping Methods 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 239000010410 layer Substances 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 11
- 239000011229 interlayer Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 13
- 239000012212 insulator Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Inverter Devices (AREA)
Abstract
The application embodiment discloses a kind of cabinet-type direct current transportation converter valve, it include: cabinet cabinet body setting at least two layers of support frame structure, thyristor cell and damping capacitor are set on every layer of support frame structure, the damping resistance bracket is set between two layers of support frame structure, and the damping resistance is fixed on the damping capacitor bracket；The damping resistance forms the first branch after connecting with damping capacitor, the first branch is in parallel with the thyristor in the thyristor cell；All thyristor cells being fixed on support frame structure pass through the busbar again and connect, and constitute change of current valve group.
Description
Technical Field
The application relates to the technical field of converter valves, in particular to a cabinet type converter valve for direct current transmission.
Background
In the direct current transmission project, the converter valve is used as a core device, and the structure of the converter valve is different according to different voltage and current grades. Can be divided into two main categories according to the fixed mode: suspended and supported. The general selection suspension type with higher voltage grade requirement is that a long strip insulator is connected with a converter valve body and a valve hall ceiling; the supporting type is generally adopted when the voltage grade requirement is lower, and the valve body of the converter valve is supported on the ground by a pillar insulator. And when the voltage level is only thousands of volts or even hundreds of volts, if a supporting structure is adopted, the solar cell panel is large and small in size, high in cost, large in occupied area and not attractive. Moreover, when the voltage level of the converter valve is very low, only thousands of volts or even hundreds of volts, as the prior art is adopted, the adoption of a post insulator generally needs to be fixed on the bottom surface, the installation is troublesome, the insulators need to be supported between layers, the space between the layers needs to have enough maintenance space, the selection of the standard insulators inevitably causes performance waste, and the integral moving of the converter valve in the later period is inconvenient; for the converter valve with smaller loss, the cooling device adopting the water cooling mode has high cost, the risk of water leakage exists in the later period, and the maintenance cost is also high. If forced air cooling is adopted, a cooling air pipeline is additionally arranged.
Disclosure of Invention
The purpose of the embodiment of the application is to provide a cabinet type converter valve for direct-current power transmission, provide a design scheme for the structure of the converter valve for direct-current power transmission with a small voltage level, and solve the problem that the existing converter valve for direct-current power transmission is not applicable.
In order to achieve the above object, an embodiment of the present application provides a rack-type dc power transmission converter valve, including: the device comprises a cabinet body, a thyristor unit, a damping capacitor, a damping resistor support and a busbar; wherein,
the cabinet body is provided with at least two layers of support frame structures, each layer of support frame structure is provided with a thyristor unit and a damping capacitor, the damping resistor support is arranged between the two layers of support frame structures, and the damping resistor is fixed on the damping capacitor support;
the damping resistor is connected with the damping capacitor in series to form a first branch circuit, and the first branch circuit is connected with a thyristor in the thyristor unit in parallel;
and all thyristor units fixed on the support frame structure are connected through the busbar to form the converter valve group.
Preferably, the method further comprises the following steps: a DC contactor; wherein,
the direct current contactor is arranged at the bottom of the cabinet body of the cabinet, and the direct current contactor is connected with the converter valve group in parallel.
Preferably, a cooling fan is arranged at the top of the cabinet body, and holes are formed in the bottom of the side face of the cabinet body for air inlet; the wall surface of the cabinet body of the cabinet forms an air duct, air flow enters from the air inlet at the bottom and comes out from the air outlet at the top, and the cooling fan extracts hot air in the cabinet body of the cabinet.
Preferably, the thyristor unit comprises: the thyristor, the thyristor control unit, the voltage-sharing resistor, the clamping device and the air-cooled radiator; wherein,
the thyristor control unit is connected with the voltage-sharing resistor in series to form a second branch circuit, and the second branch circuit is connected with the thyristor in parallel; the two ends of the clamping device are provided with the air-cooled radiators; the clamping device is used for pressing the thyristor and the air-cooled radiator together.
Preferably, the supporting frame structure comprises a supporting flower beam, a supporting insulating plate and a capacitance supporting insulating plate; the supporting flower beams are fixed on the stand columns of the cabinet body, and the supporting insulating plates and the capacitor supporting insulating plates (10) are lapped on the supporting flower beams at the same height.
Preferably, the busbar comprises an alternating current incoming line copper busbar, a direct current outgoing line copper busbar and an interlayer connection copper busbar; wherein,
the thyristors fixed on each layer of the supporting frame structure are connected through the interlayer connecting copper busbar; the alternating current incoming line copper busbar and the direct current outgoing line copper busbar extend out of two sides of the cabinet body of the cabinet through the insulating bushings to form interfaces.
Preferably, the converter valve group is a six-pulse converter valve group, a single-twelve-pulse converter valve group or a double-twelve-pulse converter valve group.
From top to bottom, compare with prior art, this technical scheme is applicable to the converter valve of the relatively little direct current transmission project of voltage and current grade, and the installation transportation is simple and convenient, has avoided equipment size and material to use, occupation space is big, with high costs, installation and the inconvenient drawback of maintenance.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is one of schematic structural diagrams of a cabinet type direct-current transmission converter valve;
FIG. 2 is a schematic view of an assembly structure of each layer of a cabinet type direct current transmission converter valve;
FIG. 3 is a schematic diagram of a thyristor cell;
FIG. 4 is a schematic diagram of a single-twelve pulse converter valve set circuit;
FIG. 5 is a circuit diagram of each thyristor level;
fig. 6 is a second schematic structural diagram of a rack-type dc power transmission converter valve.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be described more fully hereinafter with reference to the non-limiting exemplary embodiments shown in the accompanying drawings and detailed in the following description, taken in conjunction with the accompanying drawings, which illustrate, more fully, the exemplary embodiments of the present disclosure and their various features and advantageous details. It should be noted that the features illustrated in the drawings are not necessarily drawn to scale. The present disclosure omits descriptions of well-known materials, components, and process techniques so as not to obscure the example embodiments of the present disclosure. The examples given are intended merely to facilitate an understanding of ways in which the example embodiments of the disclosure may be practiced and to further enable those of skill in the art to practice the example embodiments. Thus, these examples should not be construed as limiting the scope of the embodiments of the disclosure.
Unless otherwise specifically defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Further, in the various embodiments of the present disclosure, the same or similar reference numerals denote the same or similar components.
Fig. 1 is a schematic structural diagram of a rack-type dc transmission converter valve. The method comprises the following steps: the cabinet comprises a cabinet body 1, a thyristor unit 4, a damping capacitor 5, a damping resistor 6, a damping resistor support 7 and a busbar; the cabinet body 1 is provided with at least two layers of support frame structures. Fig. 1 shows a three-layer supporting frame structure, in practice, the number of layers is determined according to the requirement, for example, in this embodiment, it is proposed that each layer of the structure can swing down four, so three layers are required to be arranged, and if the cabinet is large in size, each layer can swing six, and then two layers are enough to be arranged.
As shown in fig. 2, a schematic diagram of an assembly structure of each layer of the rack type dc transmission converter valve is shown. Each layer of support frame structure is provided with a thyristor unit 4 and a damping capacitor 5, the damping resistor support 7 is arranged between the two layers of support frame structures, and the damping resistor 6 is fixed on the damping capacitor support 7. The damping resistor 6 and the damping capacitor 5 are connected in series to form a first branch circuit, and the first branch circuit is connected in parallel with the thyristor in the thyristor unit 4.
The thyristor units 4 on each layer of the support frame structure are connected in series through the busbar to form a phase bridge arm; thyristors on the three-layer supporting frame structure are connected through the busbar to form the converter valve group. For the converter valve group, the converter valve group comprises a six-pulse converter valve group, a single-twelve-pulse converter valve group and a double-twelve-pulse converter valve group. Taking a single-twelve pulse converter valve set as an example, as shown in fig. 4, a schematic diagram of a single-twelve pulse converter valve set circuit is shown. The four thyristors 15 of each layer are connected in series to form a phase arm of three phases. Twelve thyristors 15 in the three-layer support frame structure form three bridge arms in a conformal manner, and the three bridge arms are connected to form a single-twelve-pulse converter valve group. A direct current contactor 18 is fixedly installed at the bottom in the cabinet body 1, and is connected in parallel with the single-twelve pulse converter valve group as a valve group switch K1.
Fig. 3 is a schematic structural diagram of the thyristor unit. The thyristor unit 4 includes: the thyristor 15, the thyristor control unit 8, the voltage-sharing resistor 9, the clamping device 17 and the air-cooled radiator 16; the thyristor control unit 8 and the voltage-sharing resistor 9 are connected in series to form a second branch, and the second branch is connected in parallel with the thyristor 15; the two ends of the clamping device 17 are provided with the air-cooled radiators 16; the clamping device 17 crimps the thyristor 15 and the air-cooled heat sink 16 together.
Each thyristor 15 is a single valve of a single-twelve-pulse converter valve group, as shown in fig. 5, which is a circuit diagram of each thyristor stage. A first branch formed by connecting the damping resistor 6 and the damping capacitor 5 in series is connected with the thyristor 15 in parallel, and the thyristor control unit 8 and the voltage-sharing resistor 9 are connected in series to form a second branch which is connected with the thyristor 15 in parallel. For the components shown in fig. 5, damping resistor 6 corresponds to Rs in fig. 5, damping capacitor 5 corresponds to Cs in fig. 5, and uniform resistor 9 corresponds to R in fig. 5dcThe thyristor control unit 8 corresponds to TCU in fig. 5, and the thyristor 15 corresponds to V in fig. 5.
In this embodiment, the cabinet body 1 is a standard cabinet, the height, width and depth are 1600mm, 600mm and 800mm, a centrifugal fan is installed at the top, an air inlet hole is formed at the bottom of the cabinet, and the top fan draws air to cool. Fig. 6 is a second schematic structural diagram of a rack-type dc power transmission converter valve. The top of the cabinet body 1 is provided with a cooling fan 14, and the bottom of the side surface of the cabinet body 1 is provided with an opening for air inlet; the wall of the cabinet body 1 forms an air channel, air flow enters from the air inlet at the bottom and comes out from the air outlet at the top, hot air in the cabinet body 1 is pumped out by the cooling fan 14, all devices are uniformly arranged in the cabinet body 1 and are positioned in the middle of the air channel, effective cooling can be achieved, the operating temperature of all devices in the cabinet body 1 is at a safe level, and both stable and reliable operation can be achieved.
As can be known from fig. 6, the internal pulsation rectifier bridge evenly distributed of the cabinet body 1 divides into three layers, four thyristor levels per layer, the structure per layer is the same, four holes are all opened on two sides of the cabinet body 1, six alternating current incoming line copper busbars 11 and two direct current outgoing line copper busbars 12 extend out of the cabinet body 1, an interface is formed outside the cabinet body 1, and an insulating bush 19 is fixed on each hole for insulating the potential of the six alternating current incoming line copper busbars 11 and the two direct current outgoing line copper busbars 12 from the cabinet body 1. In the embodiment, four thyristor stages are connected in series to form a bridge arm of the main electrical diagram in which four thyristor stages, namely V1, V2, V3 and V4, are connected in series, and the ac incoming copper busbar 11 on two sides leads an external ac line to a joint 10, a joint 11, a joint 12, a joint 13, a joint 14 and a joint 15 between V1 and V2 and between V3 and V4; the direct current outlet copper busbar 12 leads out a contact 16 and a contact 17 at two ends of the direct current contactor K1 and is connected with an external direct current circuit; the interlayer connecting copper bus bar 13 is connected with a contact 1, a contact 2, a contact 3, a contact 16, a contact 4, a contact 5, a contact 6, a contact 7, a contact 8, a contact 9 and a contact 17 in a main circuit diagram, and the whole converter valve set is formed.
The converter valve for the cabinet type direct current transmission provided by the technical scheme is suitable for direct current transmission projects with smaller voltage and current grades. According to the technical scheme, the converter valve group is arranged in the cabinet body of the cabinet, so that the defects of small size and material, large occupied space, high cost and inconvenience in installation and maintenance are overcome. And the cabinet body is used as an air channel, the electric elements needing heat dissipation are uniformly arranged in the middle of the air channel, air enters the bottom of the cabinet body, air is exhausted from the top of the cabinet body, heat can be effectively dissipated, and the structure is simple and convenient.
Although the present application has been described in terms of embodiments, those of ordinary skill in the art will recognize that there are numerous variations and permutations of the present application without departing from the spirit of the application, and it is intended that the appended claims encompass such variations and permutations without departing from the spirit of the application.
Claims (7)
1. A cabinet type direct current transmission converter valve is characterized by comprising: the device comprises a cabinet body (1), a thyristor unit (4), a damping capacitor (5), a damping resistor (6), a damping resistor support (7) and a busbar; wherein,
the cabinet body (1) is provided with at least two layers of support frame structures, each layer of support frame structure is provided with a thyristor unit (4) and a damping capacitor (5), the damping resistor support (7) is arranged between the two layers of support frame structures, and the damping resistor (6) is fixed on the damping capacitor support (7);
the damping resistor (6) is connected with the damping capacitor (5) in series to form a first branch circuit, and the first branch circuit is connected with a thyristor in the thyristor unit (4) in parallel;
and all thyristor units (4) fixed on the support frame structure are connected through the busbar to form the converter valve group.
2. The converter valve for rack type direct current transmission according to claim 1, further comprising: a DC contactor; wherein,
the direct current contactor is arranged at the bottom of the cabinet body (1) of the cabinet, and the direct current contactor is connected with the converter valve group in parallel.
3. The converter valve for rack type direct current transmission according to claim 1, wherein a cooling fan (14) is arranged at the top of the rack body (1), and the bottom of the side surface of the rack body (1) is provided with an opening for air intake; the wall surface of the cabinet body (1) forms an air channel, air flow enters from the air inlet at the bottom and comes out from the air outlet at the top, and hot air in the cabinet body (1) is pumped out by the cooling fan (14).
4. The converter valve for rack dc transmission according to claim 1, wherein the thyristor unit (4) comprises: the thyristor (15), the thyristor control unit (8), the voltage-sharing resistor (9), the clamping device (17) and the air-cooled radiator (16); wherein,
the thyristor control unit (8) is connected with the voltage-sharing resistor (9) in series to form a second branch circuit, and the second branch circuit is connected with the thyristor (15) in parallel; the two ends of the clamping device (17) are provided with the air-cooled radiators (16); the clamping device (17) is used for pressing the thyristor (15) and the air-cooled radiator (16) together.
5. The converter valve for rack type direct current transmission according to claim 1, wherein the support frame structure comprises a support flower beam (2), a support insulating plate (3), a capacitance support insulating plate (10); the supporting flower beam (2) is fixed on the upright post of the cabinet body (1), and the supporting insulating plate (3) and the capacitor supporting insulating plate (10) are lapped on the supporting flower beam (2) at the same height.
6. The converter valve for rack type direct current transmission according to claim 1, wherein the busbar comprises an alternating current incoming line copper busbar (11), a direct current outgoing line copper busbar (12) and an interlayer connection copper busbar (13); wherein,
the thyristors fixed on each layer of the supporting frame structure are connected through the interlayer connecting copper busbar (13); the alternating current incoming line copper busbar (11) and the direct current outgoing line copper busbar (12) extend out of two sides of the cabinet body (1) through the insulating bushes (19) to form interfaces.
7. The converter valve for rack type direct current transmission according to claim 1, wherein the converter valve group is a six-pulse converter valve group, a single-twelve-pulse converter valve group or a double-twelve-pulse converter valve group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811373836.0A CN109546868B (en) | 2018-11-19 | 2018-11-19 | Cabinet type direct current transmission converter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811373836.0A CN109546868B (en) | 2018-11-19 | 2018-11-19 | Cabinet type direct current transmission converter valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109546868A true CN109546868A (en) | 2019-03-29 |
| CN109546868B CN109546868B (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811373836.0A Active CN109546868B (en) | 2018-11-19 | 2018-11-19 | Cabinet type direct current transmission converter valve |
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| Country | Link |
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| CN (1) | CN109546868B (en) |
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| CN2914486Y (en) * | 2006-06-19 | 2007-06-20 | 哈尔滨九洲电气股份有限公司 | Controlled silicon series arrangement of high voltage soft start machine |
| CN201345606Y (en) * | 2009-01-06 | 2009-11-11 | 天津电气传动设计研究所 | Heat-pipe air-cooling rectifying device for electrolysis power source |
| CN201623625U (en) * | 2010-03-19 | 2010-11-03 | 天津电气传动设计研究所 | Integrated power component simultaneously press-connected with two elements |
| CN202796914U (en) * | 2012-09-14 | 2013-03-13 | 大力电工襄阳股份有限公司 | Assembling component for series connection of thyristors |
| CN103178723A (en) * | 2013-04-07 | 2013-06-26 | 冶金自动化研究设计院 | High-capacity rectifying water-cooling power cabinet |
| CN107800306A (en) * | 2017-11-23 | 2018-03-13 | 北京金自天正智能控制股份有限公司 | A kind of high-power AC and DC drive rectifier cabinet based on heat pipe heat radiation technology |
| CN108462376A (en) * | 2018-05-11 | 2018-08-28 | 广西富荔科技有限公司 | A kind of high-voltage frequency converter unit cabinet convenient for heat dissipation |
-
2018
- 2018-11-19 CN CN201811373836.0A patent/CN109546868B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2914486Y (en) * | 2006-06-19 | 2007-06-20 | 哈尔滨九洲电气股份有限公司 | Controlled silicon series arrangement of high voltage soft start machine |
| CN201345606Y (en) * | 2009-01-06 | 2009-11-11 | 天津电气传动设计研究所 | Heat-pipe air-cooling rectifying device for electrolysis power source |
| CN201623625U (en) * | 2010-03-19 | 2010-11-03 | 天津电气传动设计研究所 | Integrated power component simultaneously press-connected with two elements |
| CN202796914U (en) * | 2012-09-14 | 2013-03-13 | 大力电工襄阳股份有限公司 | Assembling component for series connection of thyristors |
| CN103178723A (en) * | 2013-04-07 | 2013-06-26 | 冶金自动化研究设计院 | High-capacity rectifying water-cooling power cabinet |
| CN107800306A (en) * | 2017-11-23 | 2018-03-13 | 北京金自天正智能控制股份有限公司 | A kind of high-power AC and DC drive rectifier cabinet based on heat pipe heat radiation technology |
| CN108462376A (en) * | 2018-05-11 | 2018-08-28 | 广西富荔科技有限公司 | A kind of high-voltage frequency converter unit cabinet convenient for heat dissipation |
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