CN216981156U - Converter and wind turbine comprising the same - Google Patents

Abstract

The utility model provides a converter and a wind power generator set including the converter. The converter includes a first converter assembly and a second converter assembly arranged back-to-back, the first converter assembly including a first switch cabinet and at least one first power cabinet arranged side by side, the first The two-converter assembly includes a second switch cabinet and at least one second power cabinet arranged side by side, and the number of the first power cabinet is the same as the number of the second power cabinet. The internal layout of the converter according to the utility model is more reasonable, the connecting busbars on the main circuit do not cross, the length of the busbars is greatly shortened, and the material cost of the busbars is reduced.

Description

Converter and wind turbine comprising the same

technical field

The utility model relates to the field of electric control, in particular to a converter and a wind power generator set including the converter.

Background technique

The converter of the wind turbine is an important part of the wind turbine. Its function in the wind turbine is to convert the electrical energy generated by the generator of the wind turbine into alternating current corresponding to the frequency, phase and amplitude of the grid. As a power conversion device, the converter is irreplaceable in the main power generation circuit of the wind turbine. At present, the converters of the wind turbine can be divided into full-power converters and double-fed converters.

The converter consists of the main circuit system, the power distribution system and the control system. The main circuit of power generation includes the generator-side outlet row, the generator-side circuit breaker, and the generator-side DUDT filter (usually composed of passive components such as reactors, capacitors and resistors, installed between the converter and the generator to reduce the DUDT value of the terminal, and suppress the overvoltage problem at the motor terminal caused by the superposition of reflected waves from long cables), machine-side power modules, capacitor batteries, grid-side power modules, grid-side reactors, grid-side circuit breakers, grid-side outlet bars and other devices . The existing converter is relatively large, however, the space inside the wind turbine is limited, so it is difficult to make a reasonable layout of the space at the bottom of the tower of the wind turbine. In addition, the layout design of the existing converter is unreasonable, resulting in a long main circuit path, resulting in a long connection busbar length and increased cost. In addition, the internal heat dissipation structure of the existing converter is unreasonable, which will not only lead to large selection of connecting busbar cross-sections, a large amount of materials, and increase the cost, but also lead to the failure of internal components to dissipate heat well, resulting in a high failure rate of the converter and high cost. affect the performance of the entire converter.

Utility model content

The utility model provides a converter with high volume power density and a wind power generator set including the converter, so as to solve the technical problem that the existing converter occupies a large space.

The utility model provides a converter. The converter includes a first converter assembly and a second converter assembly arranged back-to-back. The first converter assembly includes a first switch cabinet and a side-by-side arrangement. At least one first power cabinet, the second converter assembly includes a second switch cabinet and at least one second power cabinet arranged side by side, and the number of the first power cabinets is the same as the number of the second power cabinets.

According to the present invention, the interior of the first switch cabinet and the second switch cabinet may be respectively provided with partitions, so as to separate the first switch cabinet and the second switch cabinet into the partitions located above the partitions. A first cavity and a second cavity located under the partition, the first switch cabinet and the second switch cabinet respectively include a machine-side outlet row, a machine-side circuit breaker and a machine-side filter located in the first cavity device.

According to the present invention, the first switch cabinet may further include a grid-side filter, a grid-side circuit breaker and a grid-side outlet line located in the second cavity, and the second switch cabinet may further include a grid-side filter located in the second cavity. Control mounting plate in two chambers.

According to the present invention, the first switch cabinet and the second switch cabinet may further include a grid-side filter, a grid-side circuit breaker, a grid-side outlet row and a control installation board located in the second cavity, respectively.

According to the present invention, the interior of the first power cabinet and the second power cabinet can be respectively provided with partitions, so as to separate the first power cabinet and the second power cabinet into the partitions located above the partitions. A first cavity and a second cavity under the partition, the first power cabinet and the second power cabinet may include a power module assembly and a capacitor cell located in the first cavity and a power module located in the second cavity, respectively. Fuses and grid-side reactors in the cavity.

According to the present invention, the first power cabinet and the second power cabinet may further include a braking unit located in the second cavity and a top of the first power cabinet and the second power cabinet, respectively. The positive and negative electrodes of the braking unit are respectively connected to the positive and negative electrodes of the capacitor battery, one end of the braking resistor is connected to the AC end of the braking unit, and the other end is connected to the positive side of the capacitor battery.

According to the present invention, the first switch cabinet and the second switch cabinet may further include a first heat dissipation device located in the first cavity, respectively, and the first heat dissipation device may include a first heat dissipation device disposed in sequence on the machine side Heat exchanger and fan above filter.

According to the present invention, the first switch cabinet may further include a second heat dissipation device located in the second cavity, and the second heat dissipation device includes switchgear located on the front side and the rear side of the grid-side filter, respectively. Heater and fan.

According to the present invention, the first switch cabinet and the second switch cabinet may further include second heat dissipation devices located in the second cavity, respectively, and the second heat dissipation devices include filters located at the grid side respectively. front and rear heat exchangers and fans.

According to the present invention, the first power cabinet and the second power cabinet may further include a third heat dissipation device and a fourth heat dissipation device, respectively, and the third heat dissipation device includes a lower side and an upper side of the capacitor cell, respectively. A heat exchanger and a fan are provided, and the fourth heat dissipation device includes a heat exchanger and a fan sequentially arranged on the grid-side reactor.

The present invention also provides a wind power generator set, the wind power generator set includes the above-mentioned converter.

According to the converter of the utility model, the internal layout of the converter is more reasonable, the busbars connected to the main circuit have no cross, the length of the busbars is greatly shortened, and the material cost of the busbars is reduced.

According to the converter of the present invention, the internal heat dissipation scheme of the converter is better, all components are in a good heat dissipation environment, the failure rate of the components is effectively reduced, and the reliability of the converter is improved; Both can achieve good heat dissipation, thereby reducing the cross-section selection of the connecting busbar and reducing the material cost of the connecting busbar.

According to the converter of the utility model, the layout of the converter is reasonable, the volume is smaller under the same power level, and the volume power density is improved, so that it becomes a reality that the converter and other equipment are located on the same floor platform in the wind turbine. , reducing the number of platforms and reducing costs.

Description of drawings

FIG. 1 is a layout diagram schematically showing a converter according to an exemplary embodiment of the present invention;

2 is a layout diagram schematically showing an internal structure of a converter according to an exemplary embodiment of the present invention;

3 is an exploded view schematically showing a first converter assembly according to an exemplary embodiment of the present invention;

4 is a schematic diagram illustrating a heat dissipation cycle of a first heat dissipation device in a first cavity of a first switch cabinet of a first converter assembly according to an exemplary embodiment of the present invention;

5 is a schematic diagram illustrating a heat dissipation cycle of a second heat dissipation device in a second cavity of a first switch cabinet of a first converter assembly according to an exemplary embodiment of the present invention;

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

FIG. 7 is a schematic diagram of a heat dissipation cycle viewed from the front of the fourth heat dissipation device of the first power cabinet of the first converter assembly according to the exemplary embodiment of the present invention;

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

Detailed ways

The exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Throughout the specification, the same reference numbers refer to the same parts throughout.

FIG. 1 is a layout diagram schematically showing a converter according to an exemplary embodiment of the present invention;

FIG. 2 is a layout diagram schematically showing an internal structure of a converter according to an exemplary embodiment of the present invention; FIG. 3 is a schematic diagram showing a first converter assembly according to an exemplary embodiment of the present invention. exploded view.

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

Alternatively, the first inverter assembly 100 and the second inverter assembly 200 may be arranged in a mirror image, ie, the first inverter assembly 100 and the second inverter assembly 200 are identical and arranged back to back. In this case, the first converter assembly 100 and the second converter assembly 200 may operate independently, respectively.

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 can be provided according to actual needs, as long as the first power cabinet and the second power cabinet are ensured The number of power cabinets may 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 interior of the first switch cabinet 101 and the second switch cabinet 201 are respectively provided with partitions to separate the first switch cabinet 101 and the second switch cabinet 201 into a first cavity located above the partitions and the second cavity under the partition, the first switch cabinet 101 and the second switch cabinet 201 respectively include the machine side outlet line 1011, the machine side circuit breaker 1012 and the machine side filter 1013 located in the first cavity. The first switch cabinet 101 and the second switch cabinet 201 further include a grid-side filter 1014 , a grid-side circuit breaker 1015 , a grid-side outlet bar 1016 and a control installation board located in the second cavity, respectively. Optionally, the control installation boards are respectively installed on the sides of the first switch cabinet 101 and the second switch cabinet 201 .

In this exemplary embodiment, the interior of the first power cabinet 102 and the second power cabinet 202 are respectively provided with partitions to separate the first power cabinet 102 and the second power cabinet 202 into a first cavity located above the partitions and a second cavity under 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 cell 1022 located in the first cavity And the fuse 1023 and the grid side reactor 1024 located 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, respectively. The positive and negative electrodes are respectively connected to the positive and negative electrodes of the capacitor battery 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 electrode of the capacitor battery 1022 .

In another exemplary embodiment of the present application, the first converter assembly 100 and the second converter assembly 200 may not be arranged in a completely mirror image, specifically, the first power cabinet 102 and the second power cabinet 202 may be in a mirror image arrangement, while the first switchgear 101 and the second switchgear 201 are not arranged in a mirror image. In detail, the first cavities of the first switch cabinet 101 and the second switch cabinet 201 may be arranged in a mirror image, while the second cavities of the first switch cabinet 101 and the second switch cabinet 201 may not be arranged in a mirror image. In this other exemplary embodiment, the layout of the first cavities of the first switch cabinet 101 and the second switch 201 is the same as that of the exemplary embodiment described above, and details are not repeated here. Only the differences between this other exemplary embodiment and the above-mentioned exemplary embodiments will be described below. In this another exemplary embodiment, the first switch cabinet 101 includes a grid-side filter 1014 located in the second cavity, a grid side circuit breaker 1015 and grid side outlet bar 1016, while the second switchgear 201 includes the control mounting plate in the second cavity without the grid side filter 1014, grid side circuit breaker 1015 and grid side outlet bar 1016. In this other exemplary embodiment, the outgoing terminals of the grid-side power modules of the second power cabinet 202 are sequentially connected to the first switch cabinet 101 through the fuse 1023 and the grid-side reactor 1024 in the second power cabinet 202 . The machine side circuit breaker 1012 and the machine side outlet bar 1011. That is, the second converter assembly 200 may share the machine-side circuit breaker 1012 and the machine-side outlet wire bar 1011 in the first switch cabinet 101 of the first converter assembly 100 . Compared with another exemplary embodiment in which the second converter assembly 200 shares the machine-side circuit breaker 1012 and the machine-side outlet bar 1011 in the first switch cabinet 101 of the first converter assembly 100 , the first converter The mirror-arranged converters of the assembly 100 and the second converter assembly 200 can achieve a larger power level and a higher volume power density with a smaller volume. Here, the volume power density is defined as The power of the converter divided by the volume of the converter can intuitively reflect the power level that the converter can accommodate per unit volume. The larger the volume power density is, the more compact the converter design is.

The positions and connection relationships between various components of the main circuit of the converter according to the exemplary embodiment of the present invention will be described in detail below with reference to FIG. 3 . For the convenience of description, the first converter assembly 100 is taken as an example for description, and the second converter 200 has the same structure as the first converter assembly 100, which will not be repeated.

Optionally, the machine side outlet bar 1011 is connected to the machine side circuit breaker 1012 through the machine side connection busbar. connection, thereby shortening the length of the connection busbar on the machine side. The outgoing terminal of the machine-side circuit breaker 1012 and the incoming terminal of the machine-side filter 1013 are on the same level, and the connecting busbar is very short. The position of the outlet terminal of the machine-side filter 1013 is biased toward the first power cabinet 102 to facilitate connection with the power module assembly 1021 of the first power cabinet 102 . The connection busbar from the outlet terminal of the machine-side filter 1013 to the power module assembly 1021 passes above the power module assembly 1021 and is then connected to the corresponding power modules of the power module assembly 1021 respectively. The power module assembly 1021 and the capacitor cell 1022 are connected by a stacked busbar, and the distance is short. The outgoing terminal of the grid-side power module is connected downward to the fuse 1023, and then connected to the incoming terminal of the grid-side reactor 1024. The fuse 1023 is located on the connection path between the power module assembly 1021 and the grid-side reactor 1024, which can effectively shorten the connection path. The outgoing terminal of the grid-side reactor 1024 is located behind the grid-side reactor 1024 , directly penetrates the first switch cabinet 101 , and is connected to the incoming terminal of the grid-side circuit breaker 1015 . The outgoing terminals of the grid-side circuit breaker 1015 protrude from the bus bar and extend below the grid-side circuit breaker 1015 . The grid-side filter 1014 is connected to the main circuit through a cable, and the braking module 1025 and the braking resistor 1026 are also connected to the main circuit by a cable.

In this exemplary embodiment, as shown in Fig. 3, the entire path from the incoming line from the machine side to the outgoing line from the grid side is similar to the "C" type. Compared with the conventional solution, the entire main circuit path has no crossover and is greatly shortened. the length of the main loop. In this exemplary embodiment, the incoming terminal of the machine-side filter 1013 and the outgoing terminal of the machine-side circuit breaker 1012 are arranged on one side of the machine-side circuit breaker 1012, and are parallel to the outgoing terminal of the machine-side circuit breaker 1012 in the height direction. The length of the connecting busbar is greatly shortened; the incoming terminal of the power module assembly 1021 is located on the side of the first power cabinet 102, and is located on the upper side (at the height of the top of the power module), which is convenient for connecting the busbar from the power Top wiring of module assembly 1021. The incoming terminal of the grid-side reactor 1024 and the outgoing terminal of the grid-side power module are arranged on the front side 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 terminal of the grid-side reactor 1024 The terminal and the incoming terminal of the grid-side circuit breaker 1015 are arranged on the rear side of the cabinet of the first power cabinet 102, because the incoming terminal of the grid-side circuit breaker 1015 is located on the rear side of the first power cabinet 102, so the grid-side reactor The outgoing terminal of 1024 and the incoming terminal of the grid-side circuit breaker 1015 are located on the same plane, which can effectively shorten the length of the connecting busbar.

The difference between the converter according to another exemplary embodiment of the present invention and the above-mentioned exemplary embodiment of the present invention is that, in the other exemplary embodiment, the second switch cabinet 201 includes a The control installation board in the two chambers does not include the grid-side filter 1014 , the grid-side circuit breaker 1015 and the grid-side outlet bar 1016 . In this other exemplary embodiment, the outgoing terminals of the grid-side power modules of the second power cabinet 202 are sequentially connected to the first switch cabinet 101 through the fuse 1023 and the grid-side reactor 1024 in the second power cabinet 202 . The machine side circuit breaker 1012 and the machine side outlet bar 1011.

The heat dissipation device of the converter according to the exemplary embodiment of the present invention will be described in detail below with reference to FIGS. 4 to 8 . For the convenience of description, the first converter assembly 100 is mainly used as an example for description. For the second converter assembly 200, only the part different from the first converter assembly 100 will be described. The second converter assembly 200 The same parts as those of the first converter assembly 100 will not be described again.

In the exemplary embodiment, the first switchgear 101 and the second switchgear 201 respectively include a first heat dissipation device located in the first cavity, and the first heat dissipation device includes a heat exchanger sequentially disposed above the machine-side filter 1013 10 and fan 11.

As shown in FIG. 4 , in the heat dissipation cycle of the first heat dissipation device, the air cooled by the heat exchanger 10 is blown out to the front and rear directions of the machine-side filter 1013 through the action of the fan 11 . The cooling air blown forward dissipates heat to the machine-side circuit breaker 1012 and the connecting busbars there. The cooling air blown backward dissipates heat to the connection busbars at the outlet terminals of the machine-side filter 1013 . In this case, all the connecting busbars, the machine-side circuit breaker 1012 and the machine-side incoming cables are located at the air outlet of the fan 11, the wind speed is high, and the heat dissipation effect is excellent. Then, it enters the machine-side filter 1013 through the air inlet of the air cavity below the machine-side filter 1013 and dissipates heat, and finally enters the upper heat exchanger 10 to complete the cycle. Therefore, according to the characteristics of different components' temperature resistance and wind speed requirements, the adaptable arrangement is made. The temperature resistance of the machine-side circuit breaker 1012, all connecting busbars and machine-side incoming cables is relatively low, and larger The better effect can be obtained only by the wind speed; the temperature resistance of the machine-side filter 1013 is relatively good, but its own heat generation is large, and a large air volume is required to dissipate heat. The heat exchanger 10 and the fan 11 set according to this exemplary embodiment can just fully meet the above requirements. The machine-side circuit breaker 1012 , all connecting busbars and the machine-side incoming cable have low temperature resistance, so a lower temperature The cooling air dissipates heat and requires high wind speed, so it is arranged at the air outlet of the fan 11 . The heat exchanger 10 is located at the air inlet of the fan 11, which ensures that the air outlet of the fan 11 is the cooling air with the lowest temperature in the cycle, and the air outlet of the fan 11 is also the area with the highest wind speed, which fully meets the above requirements. Air cavities are arranged around the machine-side filter 1013, which ensures that all the cooling air in the cycle will pass through it before returning to the heat exchanger 10, which ensures the maximum air volume in the cycle to dissipate heat. The overall cooling cycle effect has reached the best design.

In the exemplary embodiment, the first switchgear 101 further includes a second heat dissipation device located in the second cavity, the second heat dissipation device including the heat exchanger 20 and the fan located at the front side and the rear side of the grid side filter 1014, respectively twenty one.

As shown in FIG. 5 , in the heat dissipation cycle of the second heat dissipation device, the heat exchanger 20 is provided in front of the grid-side filter 1014 , and the fan 21 is provided in the back. In operation, the air cooled by the heat exchanger 20 passes through the air cavity of the grid-side filter 1014 to dissipate heat, and then enters the fan 21 . Blow down at the air outlet of the fan 21, and blow all the connecting busbars behind the grid-side circuit breaker 1015 directly, where the wind speed is high and the heat dissipation effect is good. Then it goes back up to the heat exchanger 20 through the grid side circuit breaker 1015 and the grid side outlet row 1016 to complete the cycle. In this case, all the connecting busbars and the grid-side circuit breaker 1015 are located at the air outlet of the fan 21, the temperature is low and the wind speed is high, and the heat dissipation effect is excellent. The grid-side filter 1014 generates little heat, but is sensitive to temperature, so the heat exchanger 20 is arranged at the air inlet of the grid-side filter 1014 to ensure that the cooling air with the lowest temperature in the heat dissipation cycle is preferentially filtered on the grid side The device 1014 dissipates heat. This heat dissipation cycle also achieves the best heat dissipation for different devices.

In another exemplary embodiment of the present application, in the second switch cabinet 201, the first heat dissipation device in the first cavity is arranged in a mirror image with that in the first switch cabinet 101, in the same manner and with the same effect; the second cavity The middle is the control installation board, which has a low demand for heat dissipation wind speed. Therefore, a small amount of heat dissipation air can be distributed by the second heat dissipation device in the second cavity of the first switch cabinet 101 to dissipate heat, which can meet the heat dissipation demand.

In an exemplary embodiment, the first power cabinet 102 and the second power cabinet 202 further include a third heat dissipation device and a fourth heat dissipation device, respectively, and the third heat dissipation device includes heat exchange devices disposed on the lower side and the upper side of the capacitor cell 1022 , respectively. The fourth heat dissipation device includes the heat exchanger 40 and the fan 41 arranged on the grid-side reactor 1024 in sequence.

As shown in FIG. 6 , in the heat dissipation cycle of the third heat dissipation device, the heat exchanger 30 is disposed below the capacitor cell 1022 , the fan 31 is disposed above the capacitor cell 1022 , and the power module assembly 1021 is located directly in front of the capacitor cell 1022 . The cooling air with the lowest temperature after being cooled by the heat exchanger 30 preferentially dissipates heat to the capacitors in the capacitor battery 1022 , so as to satisfy the characteristics that the capacitors generate little heat but are sensitive to temperature, so as to achieve the best heat dissipation of the capacitor batteries 1022 Effect. The cooling air enters the fan 31 after passing through the capacitor cell 1022. The air outlet of the fan 31 is the connection busbar between the machine-side filter 1013 and the machine-side power module of the power module assembly 1021. Here, the connection busbar is arranged vertically. The cooling air duct plays a role of splitting, so that the cooling air can have a good cooling effect on both the power module assembly 1021 and the connecting busbar in front of the power module on the machine side. At the bottom of the power module assembly 1021 and the capacitor cell 1022, the cooling air returns to the heat exchanger 30 to complete 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 battery 1022, the connecting busbar and the power module assembly 1021 all obtain the best heat dissipation effect.

As shown in FIG. 7 and FIG. 8 , in the heat dissipation cycle of the fourth heat dissipation device, the heat exchanger 40 and the fan 41 are sequentially arranged above the grid-side reactor 1024 . The heat generation of the fuse 1023 is not high, but it is very sensitive to temperature, so it is directly arranged at the air outlet of the fan 41 . The cooling air with the lowest temperature after being cooled by the heat exchanger 40 directly dissipates heat to the fuse 1023 and the connecting busbars here. The air outlet of the fan 41 is rearward, which is the connection busbar between the grid-side reactor 1024 and the grid-side circuit breaker 1015, and the heat dissipation effect is also very good. The air outlet of the fan 41 is biased toward the direction of the braking unit 1025 to meet 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 the cooling air in the cycle dissipates heat, and finally returns to the heat exchanger 40 to complete the cycle here. The second power cabinet 202 is arranged in a mirror image with the first power cabinet 201 , and the heat dissipation cycle design method and heat dissipation effect are also the same.

In addition, the braking resistor 1026 is self-cooling and does not require additional heat dissipation, so it is arranged on the outside of the top of the entire converter without affecting the interior, which achieves an optimal design.

According to the converter of the present invention, the first to fourth heat dissipation devices operate independently, and all heat dissipation cycles are fully optimized. According to the requirements of different devices on temperature, wind speed, etc., the optimal performance of each part is accurately realized. requirements, so that the effect of the heat dissipation design in the entire converter has reached the best.

The present invention also provides a wind power generator set comprising the above-mentioned converter according to the present invention.

According to the converter of the present invention, due to the more reasonable layout, the volume of the entire converter is smaller than that of the conventional converter under the same power level. The lower converter and other equipment can be arranged on one floor platform, which saves a floor platform occupied by other equipment compared with conventional converters and reduces the cost.

According to the converter of the utility model, the internal layout of the converter is more reasonable, the busbars connected to the main circuit have no cross, the length of the busbars is greatly shortened, and the material cost of the busbars is reduced.

According to the converter of the present invention, the internal heat dissipation scheme of the converter is better, all components are in a good heat dissipation environment, the failure rate of the components is effectively reduced, and the reliability of the converter is improved; Both can achieve good heat dissipation, thereby reducing the cross-section selection of the connecting busbar and reducing the material cost of the busbar.

According to the converter of the utility model, the layout of the converter is reasonable, the volume is smaller under the same power level, and the volume power density is improved, so that it becomes a reality that the converter and other equipment are located on the same floor platform in the wind turbine. , reducing the number of platforms and reducing costs.

Although the exemplary embodiments of the present invention have been described in detail above, those skilled in the art should understand that various modifications and transform. However, it should be understood that, in the opinion of those skilled in the art, these modifications and variations will still fall within the scope of the present invention as defined by the claims.

Claims (11)

1. A converter, characterized in that the converter comprises a first converter assembly (100) and a second converter assembly (200) arranged back-to-back, the first converter assembly ( 100) comprising a first switchgear (101) and at least one first power cabinet (102) arranged side by side, the second converter assembly (200) comprising a second switchgear (201) and at least one first power cabinet (201) arranged side by side Two power cabinets (202), the number of the first power cabinets (102) is the same as the number of the second power cabinets (202). 2. The converter according to claim 1, characterized in that, partitions are respectively provided inside the first switch cabinet (101) and the second switch cabinet (201) to separate the first switch cabinet (101) and the second switch cabinet (201). The switchgear (101) and the second switchgear (201) are divided into a first cavity located above the partition and a second cavity located below the partition, the first switchgear (101) and the second cavity The two switch cabinets (201) respectively comprise a machine-side outlet line (1011), a machine-side circuit breaker (1012) and a machine-side filter (1013) located in the first cavity. 3. The converter according to claim 2, wherein the first switch cabinet (101) further comprises a grid-side filter (1014) and a grid-side circuit breaker (1015) located in the second cavity ) and a grid side outlet row (1016), the second switch cabinet (201) further includes a control mounting plate located in the second cavity. 4. The converter according to claim 2, characterized in that the first switchgear (101) and the second switchgear (201) respectively further comprise grid-side filters located in the second cavity A circuit breaker (1014), a grid-side circuit breaker (1015), a grid-side outlet bar (1016) and a control installation board. 5. The converter according to any one of claims 1 to 4, wherein the first power cabinet (102) and the second power cabinet (202) are respectively provided with partition plates, In order to separate the first power cabinet (102) and the second power cabinet (202) into a first cavity located above the partition and a second cavity located below the partition, the first power cabinet ( 102) and the second power cabinet (202) respectively comprise a power module assembly (1021) and a capacitor cell (1022) located in the first cavity and a fuse (1023) and a mesh located in the second cavity side reactor (1024). 6. The converter according to claim 5, characterized in that the first power cabinet (102) and the second power cabinet (202) respectively further comprise a braking unit located in the second cavity (1025) and braking resistors (1026) located at the top of the first power cabinet (102) and the second power cabinet (202), the positive and negative poles of the braking unit (1025) are connected to the The positive and negative electrodes of the capacitor battery (1022), one end of the braking resistor (1026) is connected to the AC end of the braking unit (1025), and the other end is connected to the positive electrode of the capacitor battery (1022). 7. The converter according to claim 2, wherein the first switch cabinet (101) and the second switch cabinet (201) respectively further comprise a first heat sink located in the first cavity device, wherein the first heat dissipation device includes a heat exchanger and a fan sequentially arranged on the machine-side filter (1013). 8. The converter according to claim 3, wherein the first switch cabinet (101) further comprises a second heat dissipation device located in the second cavity, the second heat dissipation device comprising Heat exchangers and fans on the front and rear sides of the grid side filter (1014). 9 . The converter according to claim 4 , wherein the first switch cabinet ( 101 ) and the second switch cabinet ( 201 ) respectively further comprise a second heat sink located in the second cavity. 10 . device, the second heat dissipation device includes a heat exchanger and a fan respectively located on the front side and the rear side of the grid-side filter (1014). 10. The converter according to claim 5, wherein the first power cabinet (102) and the second power cabinet (202) further comprise 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 arranged on the lower side and the upper side of the capacitor cell (1022), and the fourth heat dissipation device includes a heat exchanger and a fan arranged on the grid side reactor (1024) in sequence. Heat exchangers and fans. 11. A wind power generating set, characterized in that, the wind power generating set comprises the converter according to any one of claims 1-10.

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