CN216981156U

CN216981156U - Converter and wind generating set comprising same

Info

Publication number: CN216981156U
Application number: CN202220581426.0U
Authority: CN
Inventors: 杨建超; 田新钢; 高保峰; 王猛
Original assignee: Xinjiang Goldwind Science and Technology Co Ltd
Current assignee: Jinfeng Technology Co ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-07-15
Anticipated expiration: 2032-03-16

Abstract

The utility model provides a converter and a wind generating set comprising the same. The converter includes first converter subassembly and the second converter subassembly of arranging back to back, first converter subassembly includes first cubical switchboard and at least one first power cabinet of arranging side by side, the second converter subassembly includes second cubical switchboard and at least one second power cabinet of arranging side by side, the quantity of first power cabinet is the same with the quantity of second power cabinet. The converter has more reasonable internal layout, the main circuit is connected with the busbars without crossing, the length of the busbars is greatly shortened, and the material cost of the busbars is reduced.

Description

Converter and wind generating set comprising same

Technical Field

The utility model relates to the field of electric control, in particular to a converter and a wind generating set comprising the converter.

Background

The converter of the wind generating set is an important component of the wind generating set, and the converter plays a role in converting electric energy generated by a generator of the wind generating set into alternating current corresponding to the frequency, the phase and the amplitude of a power grid. The converter is used as a power conversion device and is positioned in a main power generation loop of the wind generating set, and the converter of the wind generating set can be divided into a full-power converter and a double-fed converter at present.

The converter is composed of a main circuit system, a power distribution system and a control system. The main power generation loop comprises a machine side outlet line bank, a machine side circuit breaker, a machine side DUDT filter (generally comprising passive devices such as a reactor, a capacitor and a resistor, and the like, and arranged between a converter and a generator for reducing the DUDT value at the machine side end and inhibiting the overvoltage problem of the motor side caused by the superposition of long cable reflected waves), a machine side power module, a capacitor pool, a network side power module, a network side reactor, a network side circuit breaker, a network side outlet line bank and the like. The existing converter is large in size, however, the space in the wind generating set is limited, so that the tower bottom space of the wind generating set is difficult to be reasonably distributed. In addition, the layout design of the existing converter is unreasonable, so that the path of a main loop is long, the length of a connecting busbar is long, and the cost is increased. In addition, the internal heat dissipation structure of the existing converter is unreasonable, so that the connection busbar section is large in selection, the material consumption is large, the cost is increased, and internal devices cannot dissipate heat well, so that the fault rate of the converter is high, and the performance of the whole converter is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a converter with high volume power density and a wind generating set comprising the converter, and aims to solve the technical problem that the existing converter occupies a large space.

The utility model provides a converter, which comprises a first converter assembly and a second converter assembly, wherein the first converter assembly and the second converter assembly are arranged back to back, the first converter assembly comprises a first switch cabinet and at least one first power cabinet which are arranged side by side, the second converter assembly comprises a second switch cabinet and at least one second power cabinet which are arranged side by side, and the number of the first power cabinets is the same as that of the second power cabinets.

According to the present invention, partitions may be respectively disposed inside the first and second switch cabinets to partition the first and second switch cabinets into first cavities above the partitions and second cavities below the partitions, and the first and second switch cabinets respectively include a machine side outlet row, a machine side breaker, and a machine side filter in the first cavities.

According to the present invention, the first switchgear may further include a net-side filter, a net-side breaker, and a net-side outlet in the second cavity, and the second switchgear may further include a control mounting plate in the second cavity.

According to the present invention, the first and second switch cabinets may further include a net-side filter, a net-side breaker, a net-side outlet bar, and a control mounting plate, respectively, in the second cavity.

According to the present invention, partitions may be respectively disposed inside the first and second power cabinets to partition the first and second power cabinets into a first cavity located above the partitions and a second cavity located below the partitions, and the first and second power cabinets may respectively include a power module assembly and a capacitor bank located in the first cavity and a fuse and a grid-side reactor located in the second cavity.

According to the present invention, the first power cabinet and the second power cabinet may further include a brake unit located in the second cavity and a brake resistor located at a top of the first power cabinet and the second power cabinet, a positive electrode and a negative electrode of the brake unit are connected to a positive electrode and a negative electrode of the capacitor pool, respectively, and one end of the brake resistor is connected to an ac terminal of the brake unit and the other end is connected to a positive electrode of the capacitor pool.

According to the present invention, the first switch cabinet and the second switch cabinet may further include a first heat sink in the first cavity, respectively, and the first heat sink may include a heat exchanger and a fan sequentially disposed over the machine-side filter.

According to the present invention, the first switchgear may further comprise a second heat sink in the second cavity, the second heat sink comprising a heat exchanger and a fan located at the front side and the rear side of the grid-side filter, respectively.

According to the present invention, the first and second switch cabinets may further include a second heat sink in the second cavity, respectively, the second heat sink including a heat exchanger and a fan at front and rear sides of the grid-side filter, respectively.

According to the utility model, the first power cabinet and the second power cabinet may further include a third heat dissipation device and a fourth heat dissipation device, respectively, the third heat dissipation device includes a heat exchanger and a fan respectively disposed at a lower side and an upper side of the capacitance pool, and the fourth heat dissipation device includes a heat exchanger and a fan sequentially disposed above the grid-side reactor.

The utility model also provides a wind generating set which comprises the converter.

According to the converter, the internal layout of the converter is more reasonable, the connecting bus bars on the main circuit are not crossed, the length of the bus bars is greatly shortened, and the material cost of the bus bars is reduced.

According to the converter, the internal heat dissipation scheme of the converter is better, all devices are in a good heat dissipation environment, the failure rate of the devices is effectively reduced, and the reliability of the converter is improved; in addition, all the connecting busbars can realize good heat dissipation, so that the section selection of the connecting busbars can be reduced, and the material cost of the connecting busbars is reduced.

According to the converter, the converter is reasonable in layout, so that the size is smaller under the same power level, the volume power density is improved, the fact that the converter and other equipment are located on the same layer of platform in the wind generating set is realized, the number of the platforms is reduced, and the cost is reduced.

Drawings

Fig. 1 is a layout diagram schematically illustrating a current transformer according to an exemplary embodiment of the present invention;

fig. 2 is a layout diagram schematically illustrating an internal structure of a current transformer according to an exemplary embodiment of the present invention;

fig. 3 is an exploded view schematically illustrating a first current transformer assembly according to an exemplary embodiment of the present invention;

fig. 4 is a schematic diagram schematically illustrating a heat dissipation cycle of a first heat sink in a first cavity of a first switchgear of a first converter assembly according to an exemplary embodiment of the present invention;

fig. 5 is a schematic diagram schematically illustrating a heat dissipation cycle of a second heat sink in a second cavity of a first switchgear of a first converter assembly according to an exemplary embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating a heat dissipation cycle of a third heat sink of the first power cabinet of the first converter assembly according to an exemplary embodiment of the present invention;

fig. 7 is a schematic heat dissipation cycle view schematically illustrating a fourth heat dissipation device of the first power cabinet of the first converter assembly according to an exemplary embodiment of the present invention, viewed from the front;

fig. 8 is a heat dissipation cycle diagram schematically illustrating a fourth heat dissipation device of the first power cabinet of the first converter assembly as viewed from the side according to an exemplary embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Like reference numerals refer to like elements throughout the specification.

fig. 2 is a layout diagram schematically illustrating an internal structure of a current transformer according to an exemplary embodiment of the present invention; fig. 3 is an exploded view schematically illustrating a first current transformer assembly according to an exemplary embodiment of the present invention.

As shown in fig. 1, the converter according to the exemplary embodiment of the present invention includes a first converter assembly 100 and a second converter assembly 200 arranged back to back, the first converter assembly 100 includes a first switch cabinet 101 and at least one first power cabinet 102 arranged side by side, the second converter assembly 200 includes a second switch cabinet 201 and at least one second power cabinet 202 arranged side by side, and the number of the first power cabinets 102 is the same as the number of the second power cabinets 202.

Alternatively, the first and second

current transformer assemblies

100, 200 may be arranged in mirror image, i.e. the first and second

current transformer assemblies

100, 200 are identical and arranged back to back. In this case, the first and

second converter assemblies

100 and 200 may be separately operated.

Although only one first power cabinet 102 and one second power cabinet 202 are shown in fig. 1, more first power cabinets and second power cabinets may be provided according to actual needs as long as the number of the first power cabinets and the second power cabinets is ensured to be the same, all the first power cabinets are connected in parallel, all the second power cabinets are connected in parallel, and the first power cabinets and the second power cabinets are arranged back to back.

In this exemplary embodiment, the first switch cabinet 101 and the second switch cabinet 201 are respectively provided with a partition inside, the first switch cabinet 101 and the second switch cabinet 201 are partitioned into a first chamber located above the partition and a second chamber located below the partition, and the first switch cabinet 101 and the second switch cabinet 201 respectively include a machine side outlet line 1011, a machine side breaker 1012, and a machine side filter 1013 located in the first chamber. The first switchgear 101 and the second switchgear 201 each further comprise a network side filter 1014, a network side breaker 1015, a network side outlet row 1016 and a control mounting plate located in the second cavity. Optionally, the control mounting plates are mounted on the sides of the first switch cabinet 101 and the second switch cabinet 201, respectively.

In the exemplary embodiment, the first power cabinet 102 and the second power cabinet 202 are respectively provided with a partition inside, the first power cabinet 102 and the second power cabinet 202 are partitioned into a first cavity above the partition and a second cavity below the partition, the first power cabinet 102 and the second power cabinet 202 respectively include a power module assembly 1021 (including a machine side power module and a grid side power module) and a capacitor bank 1022 in the first cavity and a fuse 1023 and a grid side reactor 1024 in the second cavity. The first power cabinet 102 and the second power cabinet 202 further include a braking unit 1025 located in the second cavity and a braking resistor 1026 located at the top of the first power cabinet 102 and the second power cabinet 202, the positive pole and the negative pole of the braking unit 1025 are respectively connected to the positive pole and the negative pole of the capacitance pool 1022, one end of the braking resistor 1026 is connected to the ac terminal of the braking unit 1025, and the other end is connected to the positive pole of the capacitance pool 1022.

In another exemplary embodiment of the present application, the first converter assembly 100 and the second converter assembly 200 may not be completely in a mirror image arrangement, and specifically, the first power cabinet 102 and the second power cabinet 202 may be in a mirror image arrangement, while the first switch cabinet 101 and the second switch cabinet 201 are not in a mirror image arrangement. In detail, the first cavities of the first and

second switch cabinets

101 and 201 may be arranged in a mirror image, and the second cavities of the first and

second switch cabinets

101 and 201 may not be arranged in a mirror image. In this further exemplary embodiment, the first cavities of the first switch cabinet 101 and the second switch 201 are identical to the layout of the exemplary embodiment described above and will not be described again here. Only the differences of this further exemplary embodiment from the above-described exemplary embodiment will be described below, in which the first switchgear cabinet 101 comprises a grid-side filter 1014, a grid-side circuit breaker 1015 and a grid-side outlet row 1016 located in the second cavity, while the second switchgear cabinet 201 comprises a control mounting board located in the second cavity and does not comprise the grid-side filter 1014, the grid-side circuit breaker 1015 and the grid-side outlet row 1016. In this other exemplary embodiment, the outlet terminals of the grid-side power module of the second power cabinet 202 are connected to the machine-side circuit breaker 1012 and the machine-side outlet row 1011 in the first switchgear 101 sequentially through the fuse 1023 and the grid-side reactor 1024 in the second power cabinet 202. That is, the second converter assembly 200 may share the machine side breaker 1012 and the machine side outlet line bank 1011 in the first switchgear 101 of the first converter assembly 100. Compared with another exemplary embodiment in which the second converter assembly 200 shares the machine-side breaker 1012 and the machine-side outlet line 1011 in the first switch cabinet 101 of the first converter assembly 100, the converter completed in the mirror image arrangement by the first converter assembly 100 and the second converter assembly 200 can achieve a larger power level and a higher volumetric power density with a smaller added volume, where the volumetric power density is defined as the power of the converter divided by the volume of the converter, and the power level that the converter can accommodate in a unit volume can be intuitively reflected, and the larger volumetric power density indicates that the converter is more compact in design.

Hereinafter, the position and connection relationship between the respective components of the main circuit of the inverter according to an exemplary embodiment of the present invention will be described in detail with reference to fig. 3. For convenience of description, the first converter assembly 100 is taken as an example for description, and the structure of the second converter 200 is the same as that of the first converter assembly 100, which will not be described again.

Alternatively, the machine side outlet line 1011 is connected to the machine side breaker 1012 through a machine side connecting bus bar, specifically, the machine side connecting bus bar is located above the machine side breaker 1012 and connected to an inlet terminal of the machine side breaker 1012, thereby shortening the length of the machine side connecting bus bar. The outlet terminal of the machine side breaker 1012 is flush with the inlet terminal of the machine side filter 1013, and the connection bus is short. The outlet terminal of the machine side filter 1013 is biased toward the first power cabinet 102 to facilitate connection with the power module component 1021 of the first power cabinet 102. The bus bars connecting the outlet terminals of the machine side filter 1013 to the power module component 1021 pass through the power module component 1021, and then are connected to the corresponding power modules of the power module component 1021. The power module assembly 1021 and the capacitance pool 1022 are connected through a laminated busbar, and the distance is short. The outgoing line terminal of net side power module is connected to fuse 1023 downwards, and the incoming line terminal of net side reactor 1024 is reconnected to, and fuse 1023 is located power module subassembly 1021 and the connecting path of net side reactor 1024, can effectively shorten the connecting path. The outlet terminal of the grid-side reactor 1024 is located behind the grid-side reactor 1024, directly penetrates to the first switch cabinet 101, and is connected with the inlet terminal of the grid-side circuit breaker 1015. The outlet terminal of the grid-side breaker 1015 extends out of the busbar and extends to the lower part of the grid-side breaker 1015, where it is located in the first switch cabinet 101 as the lap joint point of the grid-side outlet row 1016. The network side filter 1014 is connected to the main circuit by a cable, and the brake module 1025 is connected to the main circuit by a cable similar to the brake resistor 1026.

In this exemplary embodiment, as shown in fig. 3, the entire path from the machine side incoming line to the net side outgoing line is similar to a "C" shape, and the entire main loop path has no crossover, compared with the conventional scheme, and the length of the main loop is greatly shortened. In this exemplary embodiment, the incoming terminal of the machine side filter 1013 and the outgoing terminal of the machine side breaker 1012 are provided on the side of the machine side breaker 1012 while being flush with the outgoing terminal of the machine side breaker 1012 in the height direction, greatly shortening the length of the connection busbar; the incoming terminal of the power module component 1021 is located at a position offset to one side of the first power cabinet 102, and at the same time, the incoming terminal is located at an upper position (located at the height of the top of the power module), so that the connecting busbar can be conveniently routed from the top of the power module component 1021. An incoming terminal of the grid-side reactor 1024 and an outgoing terminal of the grid-side power module are arranged on the front side of the cabinet body of the first power cabinet 102 and are located on the same plane as the outgoing terminal of the grid-side power module; the outgoing line terminal of grid side reactor 1024 and the incoming line terminal of grid side circuit breaker 1015 are arranged at the rear side of the cabinet body of first power cabinet 102, because the incoming line terminal of grid side circuit breaker 1015 is located at the rear side in first power cabinet 102, thereby the outgoing line terminal of grid side reactor 1024 and the incoming line terminal of grid side circuit breaker 1015 are located on the same plane, and the length of the connecting busbar can be effectively shortened.

The converter according to another exemplary embodiment of the present invention differs from the above-described exemplary embodiment according to the present invention in that in this further exemplary embodiment the second switchgear 201 comprises a control mounting plate located in the second cavity and does not comprise the grid-side filter 1014, the grid-side breaker 1015 and the grid-side outlet row 1016. In this other exemplary embodiment, the outlet terminals of the grid-side power module of the second power cabinet 202 are connected to the machine-side circuit breaker 1012 and the machine-side outlet row 1011 in the first switchgear 101 sequentially through the fuse 1023 and the grid-side reactor 1024 in the second power cabinet 202.

The heat dissipation apparatus of the current transformer according to the exemplary embodiment of the present invention is described in detail below with reference to fig. 4 to 8. For convenience of description, the first converter assembly 100 is mainly taken as an example for description, only the different parts of the second converter assembly 200 from the first converter assembly 100 will be described, and the parts of the second converter assembly 200 that are the same as the first converter assembly 100 will not be described again.

In the exemplary embodiment, the first switch cabinet 101 and the second switch cabinet 201 each comprise a first heat sink in the first cavity, the first heat sink comprising a heat exchanger 10 and a fan 11 arranged in sequence over the side filters 1013.

As shown in fig. 4, in the heat radiation cycle of the first heat radiation device, the air cooled by the heat exchanger 10 is blown out in the front-rear direction of the machine-side filter 1013 by the action of the fan 11. The cooling air blown forward dissipates heat to the machine side breaker 1012 and the connection busbar therein. The cooling air blown backward dissipates heat from the bus bar at the outlet terminal of the machine side filter 1013. Under this condition, all the connecting busbars, the machine side circuit breaker 1012 and the machine side incoming cables are positioned at the air outlet of the fan 11, the air speed is high, and the heat dissipation effect is excellent. Then enters the side filter 1013 through the air inlet of the air chamber below the side filter 1013 and dissipates heat, and finally enters the heat exchanger 10 above to complete the cycle. Therefore, adaptive arrangement is performed according to the characteristics of different devices in temperature resistance and the required wind speed, so that the temperature resistance of the machine side circuit breaker 1012, all the connecting busbars, the machine side incoming cables and the like is relatively low, and a better effect can be obtained only by needing a higher wind speed; the machine side filter 1013 has relatively good temperature resistance, but generates a large amount of heat itself and requires a large amount of wind for heat dissipation. The heat exchanger 10 and the fan 11 provided according to this exemplary embodiment just can fully satisfy the above requirements, and the machine side circuit breaker 1012, all the connecting busbars and the machine side incoming cables have low temperature resistance, so cooling air with lower temperature is required to dissipate heat, and at the same time, the wind speed requirement is high, so the heat exchanger is arranged at the air outlet of the fan 11. The heat exchanger 10 is located at the air inlet of the fan 11, so that the air outlet of the fan 11 is the cooling air with the lowest temperature in the circulation, and the air outlet of the fan 11 is also the area with the highest air speed, and the requirements are completely met. The air chambers are provided around the machine side filter 1013 to ensure that all the cooling air in the cycle will pass through the inside of the filter before returning to the heat exchanger 10, ensuring that the maximum air volume in the cycle dissipates heat. The overall heat dissipation circulation effect reaches the optimal design.

In the exemplary embodiment, first switchgear 101 also includes a second heat sink in the second cavity, the second heat sink including a heat exchanger 20 and a fan 21 located on the front and rear sides of grid-side filter 1014, respectively.

As shown in fig. 5, in the heat dissipation cycle of the second heat sink, the heat exchanger 20 is provided in front of the grid-side filter 1014, and the fan 21 is provided behind the grid-side filter. In operation, air cooled by the heat exchanger 20 passes through and dissipates heat from the air cavity of the mesh-side filter 1014 and then enters the fan 21. Blowing downwards at the air outlet of the fan 21, and blowing directly all the connecting busbars behind the network side circuit breaker 1015, wherein the wind speed is high, and the heat dissipation effect is good. And then back up to the heat exchanger 20 through the grid side breaker 1015 and the grid side outlet row 1016, completing the cycle. In this case, all the connection busbars and the network-side circuit breakers 1015 are located at the air outlet of the fan 21, so that the temperature is low, the wind speed is high, and the heat dissipation effect is excellent. The grid side filter 1014 has a small amount of heat generation but is extremely temperature sensitive, so the heat exchanger 20 is arranged at the air inlet of the grid side filter 1014, and the cooling air with the lowest temperature in the heat dissipation cycle is guaranteed to preferentially dissipate the heat of the grid side filter 1014. The heat dissipation cycle also achieves the best heat dissipation effect for different devices.

In another exemplary embodiment of the present application, in the second switch cabinet 201, the first heat sink in the first cavity is arranged in a mirror image with that in the first switch cabinet 101, in the same way, with the same effect; the control mounting plate is arranged in the second cavity, and the requirement on the heat dissipation air speed is low, so that a small amount of heat dissipation air volume can be separated by the second heat dissipation device in the second cavity of the first switch cabinet 101 to dissipate heat, and the heat dissipation requirement can be met.

In the exemplary embodiment, first and

second power cabinets

102, 202 further include third and fourth heat sinks, respectively, the third heat sink including a heat exchanger 30 and a fan 31 disposed respectively on the lower and upper sides of the capacitive basin 1022, and the fourth heat sink including a heat exchanger 40 and a fan 41 disposed in sequence over the grid-side reactor 1024.

As shown in fig. 6, in the heat dissipation cycle of the third heat dissipation device, a heat exchanger 30 is disposed below the capacitor tank 1022, a fan 31 is disposed above the capacitor tank 1022, and the power module assembly 1021 is located right in front of the capacitor tank 1022. The cooling air with the lowest temperature cooled by the heat exchanger 30 preferentially dissipates heat of the capacitor in the capacitance pool 1022, so as to satisfy the characteristics that the capacitor has a small heat productivity but is sensitive to temperature and the like, and achieve the best heat dissipation effect of the capacitance pool 1022. Cooling air gets into fan 31 behind the capacitance tank 1022, is the female arranging of being connected of machine side wave filter 1013 and power module subassembly 1021 machine side power module at the air outlet of fan 31, and the female arranging of connecting is vertical here and arranges, plays the effect of split to the heat dissipation wind channel for cooling air can all play fine radiating effect to the female arranging of being connected in power module subassembly 1021 and machine side power module the place ahead simultaneously. At the bottom of the power module assembly 1021 and the capacitor bank 1022, the cooling air returns to the heat exchanger 30, completing the heat dissipation cycle. The heat dissipation cycle is similar to the heat dissipation cycle in the first switch cabinet 101 and the second switch cabinet 201, and the capacitor cells 1022, the connecting bus bar, and the power module assembly 1021 all have the best heat dissipation effect.

As shown in fig. 7 and 8, in the heat dissipation cycle of the fourth heat dissipation device, a heat exchanger 40 and a fan 41 are provided in this order above the grid-side reactor 1024. The fuse 1023 generates a small amount of heat but is sensitive to temperature, so it is directly disposed at the air outlet of the fan 41. The cooling air that the temperature is the lowest after the cooling of heat exchanger 40 directly dispels the heat to fuse 1023 and the female row of being connected here forward, and air temperature is low, the wind speed is big, just in time satisfies fuse 1023's demand. The air outlet of the fan 41 faces backwards, and is a connection busbar of the network side reactor 1024 and the network side breaker 1015, so that the heat dissipation effect is good. The air outlet of the fan 41 is biased to the direction of the braking unit 1025, so as to satisfy the heat dissipation requirement of the braking unit 1025. Then, the cooling air enters the air cavity of the grid-side reactor 1024 at the bottom of the grid-side reactor 1024 to ensure that all cooling air in the circulation dissipates heat of the cooling air, and finally returns to the heat exchanger 40 to complete the circulation. The second power cabinet 202 is arranged in a mirror image with the first power cabinet 201, and the design mode and the heat dissipation effect of the heat dissipation cycle are completely the same.

In addition, the braking resistor 1026 is a self-cooling mode, and additional heat dissipation is not required, so that the braking resistor is arranged on the outer side of the top of the whole converter, the influence on the inside is avoided, and the optimal design is achieved.

According to the converter, the first to fourth heat dissipation devices respectively and independently operate, all heat dissipation cycles are fully optimized, the optimal requirements of each part are accurately met aiming at the requirements of different devices on temperature, wind speed and the like, and the heat dissipation design effect in the whole converter is optimal.

According to the converter, due to the fact that layout is more reasonable, the size of the whole converter is smaller than that of a conventional converter under the same power level, the converter and other equipment can be arranged by using one layer of platform in the same tower bottom layout of the wind generating set, the one layer of platform occupied by other equipment is saved compared with the conventional converter, and cost is reduced.

According to the converter, the internal heat dissipation scheme of the converter is better, all devices are in a good heat dissipation environment, the failure rate of the devices is effectively reduced, and the reliability of the converter is improved; in addition, all the connecting busbars can realize good heat dissipation, so that the section selection of the connecting busbars can be reduced, and the material cost of the busbars is reduced.

Although exemplary embodiments of the present invention have been described above in detail, it will be understood by those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the principles and spirit of the utility model. It will be understood that modifications and variations such as would occur to those skilled in the art are intended to be included within the scope of the utility model as defined in the following claims.

Claims

1. A converter, characterized in that it comprises a first converter assembly (100) and a second converter assembly (200) arranged back to back, said first converter assembly (100) comprising a first switchgear cabinet (101) and at least one first power cabinet (102) arranged side by side, said second converter assembly (200) comprising a second switchgear cabinet (201) and at least one second power cabinet (202) arranged side by side, the number of said first power cabinets (102) being the same as the number of said second power cabinets (202).

2. The converter according to claim 1, characterized in that the first (101) and second (201) switchgear cabinet are internally provided with a partition, respectively, to divide the first (101) and second (201) switchgear cabinet into a first chamber above the partition and a second chamber below the partition, the first (101) and second (201) switchgear cabinet comprising a machine side outlet row (1011), a machine side breaker (1012) and a machine side filter (1013), respectively, in the first chamber.

3. The converter according to claim 2, characterized in that the first switchgear (101) further comprises a grid side filter (1014), a grid side breaker (1015) and a grid side outlet bank (1016) in the second cavity, and the second switchgear (201) further comprises a control mounting plate in the second cavity.

4. The converter according to claim 2, characterized in that the first (101) and second (201) switch cabinets further comprise a grid side filter (1014), a grid side breaker (1015), a grid side outlet row (1016) and a control mounting plate, respectively, located in the second cavity.

5. The converter according to any of claims 1 to 4, wherein a partition is provided inside the first power cabinet (102) and the second power cabinet (202) to separate the first power cabinet (102) and the second power cabinet (202) into a first cavity above the partition and a second cavity below the partition, the first power cabinet (102) and the second power cabinet (202) respectively comprising a power module assembly (1021) and a capacitor battery (1022) in the first cavity and a fuse (1023) and a grid-side reactor (1024) in the second cavity.

6. The converter according to claim 5, wherein the first power cabinet (102) and the second power cabinet (202) further comprise a braking unit (1025) located in the second cavity and a braking resistor (1026) located at the top of the first power cabinet (102) and the second power cabinet (202), wherein the positive pole and the negative pole of the braking unit (1025) are connected to the positive pole and the negative pole of the capacitance battery (1022), respectively, and one end of the braking resistor (1026) is connected to the alternating current terminal of the braking unit (1025) and the other end is connected to the positive pole of the capacitance battery (1022).

7. The converter according to claim 2, characterized in that said first and second switchgear cabinet (101, 201) each further comprise a first heat sink in said first cavity, said first heat sink comprising a heat exchanger and a fan arranged in sequence above said side-filter (1013).

8. The converter according to claim 3, wherein the first switchgear panel (101) further comprises a second heat sink in the second cavity, the second heat sink comprising a heat exchanger and a fan located at the front and rear side of the grid-side filter (1014), respectively.

9. The converter according to claim 4, wherein the first switchgear panel (101) and the second switchgear panel (201) each further comprise a second heat sink in the second cavity, the second heat sink comprising a heat exchanger and a fan on the front side and the back side of the grid-side filter (1014), respectively.

10. The converter according to claim 5, wherein the first power cabinet (102) and the second power cabinet (202) further comprise a third heat sink and a fourth heat sink, respectively, the third heat sink comprising a heat exchanger and a fan disposed respectively on a lower side and an upper side of the capacitive cell (1022), the fourth heat sink comprising a heat exchanger and a fan disposed in sequence over the grid-side reactor (1024).

11. Wind park according to any of claims 1-10, wherein the wind park comprises a converter according to any of claims 1-10.