CN110311537B - Power cabinet and converter - Google Patents
Power cabinet and converter Download PDFInfo
- Publication number
- CN110311537B CN110311537B CN201810236379.4A CN201810236379A CN110311537B CN 110311537 B CN110311537 B CN 110311537B CN 201810236379 A CN201810236379 A CN 201810236379A CN 110311537 B CN110311537 B CN 110311537B
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- power cabinet
- power
- busbar
- cabinet
- disposed
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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
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1427—Housings
- H05K7/1432—Housings specially adapted for power drive units or power converters
Abstract
The invention provides a power cabinet and a current transformer, wherein the power cabinet comprises a cabinet body formed by a supporting frame and three phase modules, the three phase modules are respectively vertically arranged at the upper part, the middle part and the lower part of a cavity of the power cabinet, each phase module comprises two current-limiting reactors, and the two current-limiting reactors corresponding to the phase modules are respectively arranged on the rear end surface of the power cabinet and are closely arranged with the corresponding phase modules. The power cabinet and the converter provided by the invention have the advantages that the structure of the power cabinet is more compact, the size of the power cabinet in the width direction is greatly reduced, and the requirement of a fan tower drum on the size is met.
Description
Technical Field
The invention relates to the technical field of energy power supply, in particular to a power cabinet and a converter.
Background
At present, the mainstream of an offshore wind turbine is 3-5 MW, generally more than 4MW, and the maximum is 8 MW. With the development of offshore wind power construction from intertidal zone to offshore zone in China, the single-machine capacity of a wind turbine generator set of 4.0MW and above becomes a long-term trend in consideration of cost and operation and maintenance, and the situation that high-power wind turbine generators are gradually increased, for example, the wind turbine generators can reach 6MW, 7MW, 8MW and the like and all enter a commercial operation stage, and 10MW wind turbine generators also have experimental prototypes. It can be seen that the development of offshore wind turbines towards higher power for single machines is a future trend, while solutions considering medium voltage converters in the long run are more advantageous in the case of higher power.
However, the size of the power cabinet of the existing medium-voltage offshore wind power converter made of IGCT (integrated Gate Commutated thyristor) devices is large, the maintainability is not good, the offshore wind power converter comprises many parts, the occupied area is large, the offshore wind power converter is not compact enough, the requirement on the power density of the converter in the market is higher and higher, and how to make the power cabinet of the IGCT converter more compact on the premise of ensuring the performance of the converter is a problem which needs to be solved urgently at present.
Disclosure of Invention
In view of this, the invention provides a power cabinet and a converter, which can make the structure of the power cabinet more compact, and the size of the power cabinet in the width direction is greatly reduced, so as to meet the requirement of the tower drum of the fan on the size.
The invention provides a power cabinet which comprises a cabinet body and three phase modules, wherein the cabinet body is formed by a supporting frame, the three phase modules are respectively vertically arranged at the upper part, the middle part and the lower part of a cavity of the power cabinet, each phase module comprises two current-limiting reactors, and the two current-limiting reactors corresponding to the phase modules are uniformly arranged on the rear end surface of the power cabinet and are arranged close to the corresponding phase modules.
Furthermore, each phase module further comprises two absorption resistors, and the two absorption resistors corresponding to each phase module are all arranged on the left side surface of the power cabinet.
Furthermore, each phase module and the busbar connected inside the power cabinet are arranged at the vacant positions corresponding to the phase modules, and the mounting surface of each busbar is arranged facing the front end surface of the power cabinet.
Furthermore, a short circuit detection board is arranged at the upper part of the left side surface of the power cabinet.
Furthermore, three gate power supplies are arranged on the left side face of the power cabinet, two of the three gate power supplies are all arranged in the middle of the left side face of the power cabinet, and one of the three gate power supplies is arranged at the lower part of the left side face of the power cabinet.
Furthermore, a low-inductance busbar corresponding to each phase module is respectively arranged on the rear end face of the power cabinet.
Furthermore, each low-inductance busbar is fixed to the support metal plate on the rear end face of the power cabinet through a corresponding epoxy plate, and each low-inductance busbar is located between the rear end face of the power cabinet and the current-limiting reactor.
Furthermore, the upper portion, the middle portion and the lower portion of the two sides of the cavity of the power cabinet are respectively and symmetrically provided with two heavy guide rails, the extending direction of each heavy guide rail is consistent with the depth direction of the power cabinet, and each phase module is fixedly connected with the sliding portion of the corresponding heavy guide rail.
Furthermore, the front end face of each phase module is connected with the supporting frame on the front end face of the power cabinet through a plurality of auxiliary fixing pieces.
The invention further provides a converter, which comprises the power cabinet.
Therefore, according to the power cabinet and the converter provided by the embodiment of the invention, the three phase modules are vertically arranged at the upper part, the middle part and the lower part of the cavity of the power cabinet, and the two current-limiting reactors corresponding to the phase modules are arranged on the rear end surface of the power cabinet, so that the structure of the power cabinet is more compact, the size of the power cabinet in the width direction is greatly reduced, and the requirement of a fan tower on the size is met.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a block diagram of a power cabinet according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a circuit topology of the phase module in fig. 1.
Fig. 3 is a schematic front view of a power cabinet according to a first embodiment of the present invention.
Fig. 4 is a schematic front view of a power cabinet provided in a first embodiment of the present invention after a power unit is removed.
Fig. 5 is a left side view schematic diagram of a power cabinet according to a first embodiment of the present invention.
Fig. 6 is a schematic rear view of a power cabinet according to a first embodiment of the present invention.
Fig. 7 is a schematic rear view of the power cabinet according to the first embodiment of the present invention after removing the low-inductance busbar.
Fig. 8 is a schematic top view of a power cabinet according to a first embodiment of the present invention.
Fig. 9 to 10 are schematic perspective views of a power cabinet according to a first embodiment of the present invention.
Fig. 11 is a schematic structural diagram of a heavy-duty rail in a power cabinet according to a first embodiment of the present invention.
Fig. 12 is a schematic structural diagram of an auxiliary fixing member in a power cabinet according to a first embodiment of the present invention.
Fig. 13 is a block diagram of a converter according to a second embodiment of the present invention.
Detailed Description
To further clarify the technical solutions and effects of the present invention adopted to achieve the intended purpose, the following detailed description is given of specific embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.
Fig. 1 is a block diagram of a power cabinet 100 according to a first embodiment of the present invention. Fig. 2 is a schematic circuit topology diagram of the phase module 20 in fig. 1. As shown in fig. 1 to fig. 2, the power cabinet 100 provided in this embodiment at least includes a cabinet body 10 formed by a supporting frame 12 and three phase modules 20, and the three phase modules 20 are respectively vertically installed at an upper portion, a middle portion and a lower portion of a cavity 14 of the power cabinet 100.
Specifically, in the present embodiment, each phase module 20 includes a power unit 22, two current-limiting reactors L1, L2, and two snubber resistors R2, R3.
Further, the power unit 22 includes four IGCTs V1, V2, V3, V4, four freewheeling diodes D1, D2, D3, D4, two midpoint clamping diodes D5, D6, two absorption diodes D7, D8, two sets of clamping absorption capacitors C1, C2, and a midpoint clamping resistor R1.
Wherein the circuit connection of each phase module 20 is schematically shown in fig. 2, specifically, four IGCTV1, V2, V3, V4 are sequentially connected in series between the cathode of the freewheeling diode D1 and the anode of the freewheeling diode D4, the anode of the freewheeling diode D1 is electrically connected to the cathode of the freewheeling diode D2, the anode of the freewheeling diode D2 is electrically connected to the cathode of the freewheeling diode D3, the anode of the freewheeling diode D3 is electrically connected to the cathode of the freewheeling diode D4, the cathode of the midpoint clamping diode D5 is electrically connected to the node between the anode of the freewheeling diode D1 and the cathode of the freewheeling diode D2, the anode of the midpoint clamping diode D5 is electrically connected to the cathode of the midpoint clamping diode D6, the anode of the midpoint clamping diode D6 is electrically connected to the node between the anode of the freewheeling diode D3 and the cathode of the freewheeling diode D4, the anode of the absorption diode D7 is electrically connected to the cathode of the freewheeling diode D1, the cathode of the absorption diode D7 is electrically connected with the anode of the absorption diode D8 through clamping absorption capacitors C1 and C2 in sequence, the cathode of the absorption diode D8 is electrically connected with the anode of the freewheeling diode D4, the first end of the midpoint clamping resistor R1 is electrically connected with the cathode of the midpoint clamping diode D5, and the second end of the midpoint clamping resistor R1 is electrically connected with the anode of the midpoint clamping diode D6.
Further, a first end of the current-limiting reactor L1 is electrically connected to the anode of the IGCT V1, a second end of the current-limiting reactor L1 is electrically connected to a first end of the absorption resistor R2, a second end of the absorption resistor R2 is connected to a node between the absorption diode D7 and the absorption capacitor C1, a first end of the current-limiting reactor L2 is electrically connected to the cathode of the IGCT V4, a second end of the current-limiting reactor L2 is connected to a first end of the absorption resistor R3, and a second end of the absorption resistor R3 is connected to a node between the absorption diode D8 and the absorption capacitor C2.
Referring to fig. 3 to 10, fig. 3 is a schematic front view structure diagram of a power cabinet 100 according to a first embodiment of the present invention, fig. 4 is a schematic front view structure diagram of the power cabinet 100 according to the first embodiment of the present invention after a power unit 22 is removed, fig. 5 is a schematic left view structure diagram of the power cabinet 100 according to the first embodiment of the present invention, fig. 6 is a schematic rear view structure diagram of the power cabinet 100 according to the first embodiment of the present invention, fig. 7 is a schematic rear view structure diagram of the power cabinet 100 according to the first embodiment of the present invention after a low-sense bus bar 33 is removed, fig. 8 is a schematic top view structure diagram of the power cabinet 100 according to the first embodiment of the present invention, and fig. 9 to 10 are schematic perspective structure diagrams of the power cabinet 100 according to the first embodiment of the present invention. As shown in fig. 1 to 10, the power cabinet 100 provided in this embodiment includes a cabinet 10 formed by a supporting frame 12 and three phase modules 20, the three phase modules 20 are respectively vertically installed at an upper portion, a middle portion and a lower portion of a cavity 14 of the power cabinet 100, each phase module 20 includes two current limiting reactors 24, and the two current limiting reactors 24 corresponding to each phase module 20 are both disposed on a rear end surface 11 of the power cabinet 100 and are disposed in close proximity to the corresponding phase module 20. Specifically, in the present embodiment, the current limiting reactor 24 mainly limits the rate of change of the current, and protects the power device from an excessively high rate of change of the current. Further, in order to make the power cabinet 100 more compact and improve maintainability, the power unit 22 is vertically disposed, and two current limiting reactors 24 connected to the corresponding power unit 22 on the circuit are disposed on the rear end surface 11 of the power cabinet 100, so that the width direction of the cabinet body 10 is greatly reduced.
Specifically, in the present embodiment, the supporting frame 12 includes a plurality of first supporting members 121 disposed along the vertical direction and a plurality of second supporting members 122 disposed along the horizontal direction. Specifically, in one embodiment, the first supporting members 121 are 4, and the second supporting members 122 may be, but are not limited to, 16, and specifically, each 4 second supporting members 122 are disposed on the same layer of the cabinet 10, so that the 4 groups of second supporting members 122 divide the cavity 14 of the cabinet 10 into an upper portion, a middle portion and a lower portion.
Specifically, in this embodiment, the two current-limiting reactors 24 in each phase module 20 are respectively fixed on the second supporting member 122 in the rear end surface 11 of the power cabinet 100 through the supporting sheet metal part 35, so that the current-limiting reactors 24 can be arranged close to the rear end surface 11 of the power cabinet 100, the width of the power cabinet 100 is reduced without increasing the depth of the power cabinet 100, the structure of the power cabinet 100 is more compact, and the requirement of the fan tower is met.
Specifically, in the present embodiment, each phase module 20 further includes two absorption resistors 26, and each of the two absorption resistors 26 corresponding to each phase module 20 is disposed on the left side surface 15 of the power cabinet 100, but is not limited thereto, for example, in other embodiments, each of the two absorption resistors 26 corresponding to each phase module 20 may also be disposed on the right side surface 17 of the power cabinet 100.
Specifically, in the present embodiment, the support frame 12 may include, but is not limited to, a plurality of first support plates 123 disposed in a vertical direction and a plurality of second support plates 124 disposed in a horizontal direction. Specifically, the first support plates 123 may be, but are not limited to, 4, wherein two first support plates 123 are respectively fixed on the second supports 122 on the left side surface 15 of the power cabinet 100, and the other two first support plates 123 are respectively fixed on the right side surface 17 of the power cabinet 100. Two ends of the plurality of second supporting plates 124 are respectively disposed on two first supporting plates 123 on the left side surface 15 of the power cabinet 100 or on the first supporting members 121 and the first supporting plates 123 close to the corresponding first supporting members 121.
Specifically, in the present embodiment, two absorption resistors 26 corresponding to each phase module 20 are respectively fixed on the second support plate 124 on the left side face 15 of the power cabinet 100. Specifically, in one embodiment, the phase module 20 mounted on the upper portion of the cavity 14 of the power cabinet 100 is described as follows. Two absorption resistors 26 mounted on the second support plate 124 on the upper portion of the left side surface 15 of the power cabinet 100 are vertically arranged, and one end of each of the two absorption resistors 26 may share one second support plate 124, it should be noted that one of the two absorption resistors 26 is disposed near the upper portion of the power unit 22, and the other of the two absorption resistors 26 is disposed near the lower portion of the power unit 22, so that connection lines between the two absorption resistors 26 and corresponding power devices in the power unit 22 can be shortened, and stray inductance can be reduced.
Specifically, in the present embodiment, the absorption resistor 26 mainly absorbs the energy stored in the current-limiting reactor 24, so as to reduce the induced voltage of the current-limiting reactor 24 when the power device is turned off, and ensure the safety of the power device.
Specifically, in the present embodiment, the power cabinet 100 further includes a short-circuit detection board 31, and the short-circuit detection board 31 mainly detects the voltage across the current-limiting reactor 24 to determine whether there is a short circuit. Specifically, a short-circuit detection plate 31 is provided on an upper portion of the left side surface 15 of the power cabinet 100. Specifically, in an embodiment, the short circuit detection plate 31 may be fixedly disposed on the second support plate 124 on the upper portion of the left side surface 15 of the power cabinet 100.
Specifically, in the present embodiment, three gate power supplies 32 are provided on the left side surface 15 of the power cabinet 100. Specifically, in one embodiment, two of the three gate power supplies 32 are disposed in the middle of the left side 15 of the power cabinet 100, and one of the three gate power supplies 32 is disposed in the lower portion of the left side 15 of the power cabinet 100. Specifically, the upper one of the two gate power supplies 32 disposed on the middle of the left side surface 15 of the power cabinet 100 is electrically connected to the power unit 22 disposed on the upper portion of the cavity 14 of the power cabinet 100, and the lower one of the two gate power supplies 32 disposed on the middle of the left side surface 15 of the power cabinet 100 is electrically connected to the power unit 22 disposed on the middle portion of the cavity 14 of the power cabinet 100. The gate power supply 32 disposed at the lower portion of the left side surface 15 of the power cabinet 100 is electrically connected to the power unit 22 disposed at the lower portion of the cavity 14 of the power cabinet 100. The three gate power supplies 32 respectively supply power to the driving of the power devices in the corresponding power cells 22.
Specifically, in the present embodiment, the power cabinet 100 further includes three low-inductance bus bars 33. Specifically, the low-inductance bus bars 33 corresponding to each phase module 20 are respectively provided on the rear end surface 11 of the power cabinet 100. Specifically, the low-inductance bus bar 33 is used for connection, so that the connection stray inductance is reduced, and the performance of the power unit 22 is improved.
Specifically, in the present embodiment, each low-inductance bus bar 33 is fixed to the supporting sheet metal part 35 of the rear end surface 11 of the power cabinet 100 through a corresponding epoxy plate (not shown), and each low-inductance bus bar 33 is located between the rear end surface 11 of the power cabinet 100 and the current limiting reactor 24.
Specifically, in an embodiment, the low-inductance busbar 33 is fixed by directly attaching an epoxy plate to the low-inductance busbar 33, and then fixing the epoxy plate to the supporting sheet metal part 35 on the rear end surface of the power cabinet 100, so that the front space and the rear space of the power cabinet 100 can be compressed. Meanwhile, when the low-inductance busbar 33 is detached, the epoxy plate and the connecting bolt for supporting the sheet metal part 35 can be detached, the low-inductance busbar 33 and the supporting sheet metal part 35 are staggered in the left and right directions of the cabinet body 10, so that the low-inductance busbar 33 can be taken out conveniently, the number of cross beams on the rear end face of the power cabinet 100 is small, and assembly and maintenance are facilitated.
Specifically, in an embodiment, the current-limiting reactor 24 is arranged right behind the corresponding phase module 20, the connection outlet of the current-limiting reactor 24 is close to the connection outlet of the power unit 22, and the low-inductance busbar 33 is arranged at the rear end of the current-limiting reactor 24, so that the connection between the current-limiting reactor 24 and the low-inductance busbar 33 is closer, the stray inductance of line connection is smaller, and the performance of a power device is better improved.
Specifically, in the present embodiment, busbars (not shown) connecting each phase module 20 and the inside of the power cabinet 100 are all disposed at the vacant positions of the corresponding phase modules 20, and the mounting surface of each busbar is disposed facing the front end surface 13 of the power cabinet 100.
Specifically, in an embodiment, the busbars in each power unit 22 may include, but are not limited to, a DC positive busbar 341, a DC negative busbar 342, an NP busbar 343, a PH busbar 344, a positive absorbing busbar 345, and a negative absorbing busbar 346. Specifically, electrical mounting holes (not shown) in the DC positive busbar 341, the DC negative busbar 342, the PH busbar 344, the NP busbar 343, the positive absorbing busbar 345 and the negative absorbing busbar 346 are all disposed on the periphery of the power unit 22, and the electrical mounting holes in the DC positive busbar 341, the DC negative busbar 342, the PH busbar 344, the NP busbar 343, the positive absorbing busbar 345 and the negative absorbing busbar 346 can be orthographically projected on the front end surface 13 of the power cabinet 100, so that a user can conveniently assemble and disassemble bolts (not shown) in the electrical mounting holes of the DC positive busbar 341, the DC negative busbar 342, the PH busbar 344, the NP busbar 343, the positive absorbing busbar 345 and the negative absorbing busbar 346 from the front end surface 13 of the power cabinet 100.
Specifically, in the present embodiment, taking the power unit 22 disposed in the middle of the cavity 14 of the power cabinet 100 as an example, the DC positive busbar 341 is disposed at an edge of the rear side of the power unit 22 extending outward from the upper edge, and the DC positive busbar 341 is disposed at an edge of the rear side of the power unit 22 extending outward from the lower edge. NP bus bar 343 is disposed at the left outwardly extending edge of the rear side of power cell 22 and PH bus bar 344 is disposed at the right outwardly extending edge of the rear side of power cell 22. The positive absorbing bus bar 345 is disposed at an outward extension of a left side surface of the power cell 22, and is disposed near an upper portion of the power cell 22. The negative absorbing bus bar 346 is disposed at an outward extension of a left side surface of the power cell 22, and is disposed near a lower portion of the power cell 22. Further, the end surfaces of the electrical mounting holes of the DC positive busbar 341, the DC negative busbar 342, the PH busbar 344, the NP busbar 343, the positive absorbing busbar 345 and the negative absorbing busbar 346 are all arranged in parallel with the front end surface 13 of the power cabinet 100, so that a user can conveniently assemble and disassemble bolts of the electrical mounting holes of the busbars from the front end surface, the user can conveniently use the bolt, and the requirement of front end maintenance can be met.
Specifically, in the present embodiment, the power cabinet 100 further includes a connection busbar 37 and an NP connection busbar 38. Specifically, the connection bus bar 37 is used to connect the current-limiting reactor 24 with the low-inductance bus bar 33. The NP connection bus bar 38 is used to connect the power unit 22 with the low inductance bus bar 33.
Referring to fig. 11, fig. 11 is a schematic structural diagram of a heavy rail 40 in a power cabinet 100 according to a first embodiment of the present invention. As shown in fig. 1 to 11, the power cabinet 100 provided in the present embodiment further includes a plurality of heavy-duty rails 40. Specifically, in one embodiment, the heavy duty rail 40 may be, but is not limited to, six. Specifically, the heavy-duty guide rail 40 includes a fixing portion 42 and a sliding portion 44, and specifically, an elongated sliding slot 422 for accommodating the sliding portion 44 is opened on an end surface of the fixing portion 42. The sliding portion 44 is fitted in the sliding groove 422 of the fixing portion 42 and can slide along the extending direction of the sliding groove 422 of the fixing portion 42. Further, a locking portion 424 for locking the sliding portion 44 is provided on the first end of the fixing portion 42. Specifically, when the locking portion 424 is unlocked, the first end of the sliding portion 44 may slide along the extending direction of the sliding slot 422 and may slide out of the first end of the fixing portion 42. Further, a position-limiting part (not shown) is further disposed on the first end of the fixing part 42 for limiting and fixing the second end of the sliding part 44, and preventing the second end of the sliding part 44 from sliding out of the first end of the fixing part 42.
Specifically, in the present embodiment, the upper portion, the middle portion, and the upper portion of the cavity 14 of the power cabinet 100 are respectively and symmetrically provided with two heavy-duty guide rails 40, the extending direction of each heavy-duty guide rail 40 is the same as the depth direction of the power cabinet 100, and each phase module 20 is fixedly connected to the sliding portion 44 of the corresponding heavy-duty guide rail 40. Specifically, the fixing portions 42 of the heavy guide rail 40 may be fixed on both sides of the power cabinet 100 by fastening bolts, and the sliding portions 44 of the heavy guide rail 40 are fixed with the bottom of the power unit 22 by fastening bolts.
Specifically, in the power cabinet 100 provided in this embodiment, the power unit 22 is mounted on the heavy-duty rail 40 by using the heavy-duty rail 40, when the power device needs to be replaced, the bolts mounted in the electrical mounting holes of the DC positive busbar 341, the DC negative busbar 342, the PH busbar 344, the NP busbar 343, the positive absorbing busbar 345, and the negative absorbing busbar 346 are detached, and the locking portion 424 of the heavy-duty rail 40 is unlocked, so that the corresponding power unit 22 can be conveniently pulled out to a certain position by sliding along the sliding portion 44 of the heavy-duty rail 40, and the user can conveniently maintain the corresponding power unit 22 without lifting the power unit 22 from the power cabinet 100, thereby facilitating the maintenance of the user and improving the maintenance efficiency.
Referring to fig. 12, fig. 12 is a schematic structural diagram of an auxiliary fixing member 50 in a power cabinet 100 according to a first embodiment of the present invention. As shown in fig. 1 to 12, the power cabinet 100 provided in this embodiment further includes a plurality of auxiliary fixtures 50. Specifically, in one embodiment, the auxiliary fixing member 50 may include, but is not limited to, a first end portion 52 and a second end portion 54 perpendicular to the first end portion 52, and the first end portion 52 and the second end portion 54 are respectively provided with a mounting hole 58. Further, the first end portion 52 and the second end portion 54 may be, but are not limited to, obtained by bending a sheet metal member. Specifically, the auxiliary fixing member 50 may further include a third end portion 56, and specifically, the third end portion 56 may be, but is not limited to, a bent portion of the first end portion 52, and the third end portion 56 is perpendicular to the first end portion 52 and the second end portion 54.
Specifically, in the present embodiment, the front end face of each phase module 20 is connected to the support frame 12 on the front end face 13 of the power cabinet 100 by a plurality of auxiliary fixtures 50. Specifically, in an embodiment, the front end surface of each phase module 20 may be fixed, but is not limited to be fixed, by 4 auxiliary fixing members 50, and specifically, each auxiliary fixing member 50 is respectively fixed at a corner of the power unit 22 and on the corresponding supporting frame 12 by a bolt, so as to fix and limit the power unit 22, and prevent the power cabinet 100 from moving during transportation or operation.
Specifically, in the present embodiment, a current sensor 72 is disposed at the ac end of the rear end of each power unit 22. Specifically, the current sensor 72 mainly detects the current at the ac terminal of the power unit 22 to set the control input condition according to the detected current.
Specifically, in the present embodiment, the main water inlet and outlet pipe 62 of the inverter passes through the rear portion of the power cabinet 100, and the main water inlet and outlet pipe 64 of each power unit 22 in the power cabinet 100 may be, but is not limited to, connected with the main water inlet and outlet pipe 62 of the inverter through the strouhber joint 63. Specifically, in an embodiment, the water inlet pipe 66 and the water outlet pipe 68 of the corresponding power device are led out from the main water inlet and outlet pipe 64 of each power unit 22 in the power cabinet 100, wherein the main water inlet and outlet pipe 62 of the converter and the main water inlet and outlet pipe 64 of the power unit 22 are both two, one is a main water inlet pipe, the other is a main water outlet pipe, specifically, the water inlet pipe 66 of the power device is connected with the main water inlet pipe of the power unit 22, and the water outlet pipe 68 of the power device is connected with the main water outlet pipe of the power unit 22.
Specifically, in the present embodiment, the absorption resistor 26 and the current limiting reactor 24 are also water-cooled to dissipate heat, and the water paths for the absorption resistor 26 and the current limiting reactor 24 are led out from the main water inlet/outlet pipe 62 of the converter and the main water inlet/outlet pipe 64 of the corresponding power unit 22 in the power cabinet 100, so as to shorten the water paths for the absorption resistor 26 and the current limiting reactor 24.
Referring to fig. 13, fig. 13 is a block diagram of a current transformer 200 according to a second embodiment of the present invention. As shown in fig. 13, the converter 200 provided in the present embodiment includes a power cabinet 210. Specifically, in the present embodiment, please refer to the description of the power cabinet 100 in the embodiment shown in fig. 1 to 12 for the specific structure of the power cabinet 210, which is not repeated herein.
According to the power cabinet and the converter provided by the embodiment of the invention, the three phase modules are vertically arranged at the upper part, the middle part and the lower part of the cavity of the power cabinet, and the two current-limiting reactors corresponding to the phase modules are arranged on the rear end surface of the power cabinet, so that the structure of the power cabinet is more compact, the size of the power cabinet in the width direction is greatly reduced, and the requirement of a fan tower on the size is met.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A power cabinet is characterized by comprising a cabinet body formed by a supporting frame and three phase modules, wherein the three phase modules are respectively vertically arranged at the upper part, the middle part and the lower part of a cavity of the power cabinet;
each phase module further comprises two absorption resistors which are respectively arranged at the upper part and the lower part of the power unit.
2. The power cabinet of claim 1, wherein both of the absorption resistors corresponding to each of the phase modules are disposed on a left side of the power cabinet.
3. The power cabinet according to claim 1, wherein each of the phase modules and the busbar connected to the inside of the power cabinet are arranged at the vacant positions of the corresponding phase modules, and the mounting surface of each busbar is arranged facing the front end surface of the power cabinet.
4. The power cabinet according to claim 1, wherein a short circuit detection board is provided at an upper portion of a left side surface of the power cabinet.
5. The power cabinet of claim 1, wherein three gate power supplies are provided on the left side of the power cabinet, two of the three gate power supplies are disposed in the middle of the left side of the power cabinet, and one of the three gate power supplies is disposed at the lower portion of the left side of the power cabinet.
6. The power cabinet according to claim 1, wherein a low-inductance busbar corresponding to each phase module is respectively provided on a rear end surface of the power cabinet.
7. The power cabinet according to claim 6, wherein each low-inductance busbar is fixed to a supporting metal plate on the rear end face of the power cabinet through a corresponding epoxy plate, and each low-inductance busbar is located between the rear end face of the power cabinet and the current-limiting reactor.
8. The power cabinet according to claim 1, wherein the upper, middle and lower parts of the cavity of the power cabinet are symmetrically provided with two heavy-duty rails respectively, each heavy-duty rail extends in a direction corresponding to the depth direction of the power cabinet, and each phase module is fixedly connected to the sliding part of the corresponding heavy-duty rail.
9. The power cabinet of claim 1, wherein a front face of each of the phase modules is connected to a support frame on the front face of the power cabinet by a plurality of auxiliary fixtures.
10. A converter, characterized in that it comprises a power cabinet according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236379.4A CN110311537B (en) | 2018-03-21 | 2018-03-21 | Power cabinet and converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236379.4A CN110311537B (en) | 2018-03-21 | 2018-03-21 | Power cabinet and converter |
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| Publication Number | Publication Date |
|---|---|
| CN110311537A CN110311537A (en) | 2019-10-08 |
| CN110311537B true CN110311537B (en) | 2021-03-16 |
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| CN201810236379.4A Active CN110311537B (en) | 2018-03-21 | 2018-03-21 | Power cabinet and converter |
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| CN114257108A (en) * | 2020-09-22 | 2022-03-29 | 株洲变流技术国家工程研究中心有限公司 | Three-level converter module |
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| CN202103432U (en) * | 2011-06-18 | 2012-01-04 | 江苏方程电力科技有限公司 | Internal assembling structure for active filter |
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| CN100426639C (en) * | 2007-01-04 | 2008-10-15 | 冶金自动化研究设计院 | High-tension integral gate change transistor three-level frequency-converter power cabinet |
| CN201341109Y (en) * | 2008-11-21 | 2009-11-04 | 上海电机学院 | Frequency conversion cabinet for ship electric propulsion experiment system |
| CN102097941B (en) * | 2010-12-30 | 2012-12-26 | 冶金自动化研究设计院 | Dual PWM (pulse width modulation) integrated gate commutated thyristor three-level power cabinet |
| CN102158057B (en) * | 2011-04-01 | 2013-05-01 | 株洲南车时代电气股份有限公司 | Modularized power cabinet |
| CN202872614U (en) * | 2012-09-21 | 2013-04-10 | 阳光电源股份有限公司 | High-power water cooling current transformer |
| US9276474B2 (en) * | 2014-02-27 | 2016-03-01 | Edison DC Systems, Inc. | Power conversion system with controlled neutral |
| CN106487255A (en) * | 2016-11-04 | 2017-03-08 | 中车株洲电力机车研究所有限公司 | Current transformer |
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| WO2011086048A1 (en) * | 2010-01-14 | 2011-07-21 | Woodward Kempen Gmbh | Circuit arrangement of electronic circuit breakers of a power generation device |
| CN202103432U (en) * | 2011-06-18 | 2012-01-04 | 江苏方程电力科技有限公司 | Internal assembling structure for active filter |
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