An ac / dc power module for 10kv flexible multi-feed line installations

Abstract

This utility model relates to the field of reactive power compensation technology, and in particular to an AC / DC power module for a 10kV flexible multi-feeder device. The shielding plate divides the outer shell into upper and lower layers. The AC / DC power module includes a heating unit, a heat sink, a control and protection unit, a DC fan (first), and a DC fan (second). The control and protection unit and the first DC fan are fixedly installed on the upper layer of the shielding plate; the heating unit, heat sink, and the second DC fan are fixedly installed on the lower layer of the shielding plate; and an indicator light board and an interface board are fixedly installed on the outer shell. The advantages of this utility model are: the shielding plate divides the outer shell into upper and lower layers, with the control and protection unit and the first DC fan fixedly installed on the upper layer; the heating unit, heat sink, and the second DC fan fixedly installed on the lower layer, saving space and improving the anti-interference capability of the control and protection unit; the first DC fan installed on the upper layer dissipates heat from the upper components, ensuring that the components and boards are not damaged due to overheating.

Description

Technical Field

[0001] This utility model relates to the field of reactive power compensation technology, and in particular to an AC / DC power module for a 10kV flexible multi-feeder device. Background Technology

[0002] The AC / DC power module of the 10kV flexible multi-feeder system is a major component of the parallel-side compensation device and the series-side compensation device of the 10kV flexible multi-feeder system. The parallel-side compensation device and the series-side compensation device usually adopt the patent with publication number CN106159975A, entitled "A Series Compensation Device Applicable to Multi-Circuit Lines". In the parallel-side compensation device, the AC / DC power module is used to realize active power control, reactive power compensation and harmonic current compensation. In the series-side compensation device, the AC / DC power module is used for sag compensation.

[0003] Currently, the installation process of AC / DC power modules suffers from problems such as chaotic module layout, disordered installation, unreasonable air ducts, and too many connectors and wires, leading to cumbersome assembly, unstable operation, and difficult maintenance. Utility Model Content

[0004] The purpose of this invention is to provide an AC / DC power module for a 10kV flexible multi-feeder device. The AC / DC power module adopts an upper and lower layer arrangement, with independent air ducts for cooling between the upper and lower layers. It has a compact structure and is easy to assemble.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] An AC / DC power module for a 10kV flexible multi-feeder device includes a housing, a shielding plate, an AC / DC power module, an indicator light board 2, and an interface board 10. The housing has a frame structure, and the shielding plate divides the housing into upper and lower layers. The AC / DC power module includes a heating unit, a heat sink 14, a control and protection unit, a DC fan 4, and a DC fan 12. The control and protection unit and the DC fan 4 are fixedly installed on the upper layer of the shielding plate; the heating unit, the heat sink 14, and the DC fan 12 are fixedly installed on the lower layer of the shielding plate; the indicator light board 2 and the interface board 10 are fixedly installed on the housing.

[0007] The heating unit includes an IGBT module 13, a second DC fan 12 located on the front side of the IGBT module 13, and a heat sink 14 located on the rear side of the second DC fan 12. The IGBT module 13 is fixedly mounted on the heat sink 14, and the heating unit and the heat sink 14 form a heat dissipation airflow channel.

[0008] The heat dissipation unit also includes a filter inductor 15 and a mesh-side inductor plate 16. The filter inductor 15 is located on the rear side of the heat sink 14, and the mesh-side inductor plate 16 is located on the rear side of the filter inductor 15.

[0009] The control and protection unit includes a power supply board 5 and an IGBT power board 3. The power supply board 5 is located in the middle of the upper layer of the shielding plate, and the IGBT power board 3 is located on the front side of the power supply board 5. The DC fan 4 is located on the rear side of the IGBT power board 3.

[0010] The control and protection unit also includes a DC contactor 6, a DC Hall sensor 7, a DC fuse 8, a DC molded case circuit breaker 9, and an AC molded case circuit breaker 11. The AC molded case circuit breaker 11 and the DC molded case circuit breaker 9 are located on the rear side of the power supply board 5. The DC contactor 6 and the DC Hall sensor 7 are arranged sequentially on the upper part of the power supply board 5. The DC fuse 8 is located on the rear side of the DC Hall sensor 7.

[0011] The housing includes a front panel and a rear cover. The indicator light panel 2 is fixedly mounted on the front panel, and the interface panel 10 is fixedly mounted on the rear cover.

[0012] The shielding plate is a sheet metal part.

[0013] The shielding plate is connected to the outer shell body via L-shaped corner fittings, and the outer shell adopts a screw-on structure.

[0014] Mylar membrane 17 is installed below both the power board and the IGBT power board.

[0015] A Mylar film 17 is provided below the mesh-side inductor plate 16.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The shielding plate divides the outer shell into upper and lower layers. The control and protection unit and DC fan one are fixedly installed on the upper layer of the shielding plate; the heating unit, heat sink and DC fan two are fixedly installed on the lower layer of the shielding plate. This saves space, reduces the size of the module, and makes the structure compact. The use of the shielding plate ensures the stable operation of the control and protection unit and improves the anti-interference ability of the control and protection unit.

[0018] 2. A DC fan is installed on the upper layer of the AC / DC power module to dissipate heat from the upper-layer components, ensuring that the components and boards are not damaged due to overheating;

[0019] 3. The DC fan prioritizes cooling the IGBT heatsink. A filter inductor and a mesh-side inductor plate are installed at the rear of the heatsink. After the air blows over the heatsink, it continues to cool the filter inductor and the mesh-side inductor plate. The heat-generating unit is placed in the lower layer of the AC / DC power module for centralized heat dissipation. This structure saves space, meets the heat dissipation requirements of the components, and has low energy consumption.

[0020] 4. The AC / DC power module is equipped with an AC molded case circuit breaker, current transformer (integrated on the power board), and fuse on the AC side, and a DC molded case circuit breaker, DC Hall sensor, and DC fuse on the DC side. This allows for real-time monitoring of the AC / DC power module's operating status and enables protection and disconnection of the AC / DC power module from the main circuit at any time, facilitating maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the AC / DC power module structure for a 10kV flexible multi-feeder device.

[0022] Figure 2 This is the main view of the AC / DC power module.

[0023] Figure 3 This is a side view of the AC / DC power module.

[0024] Figure 4 yes Figure 3 A sectional view along line AA.

[0025] Figure 5 yes Figure 3 Sectional view along line BB.

[0026] Figure 6 This is an isometric side view with the housing hidden.

[0027] In the diagram: 1. Housing; 2. Indicator light board; 3. IGBT power board; 4. DC fan one; 5. Power board; 6. DC contactor; 7. DC Hall sensor; 8. DC fuse; 9. DC molded case circuit breaker; 10. Interface board; 11. AC molded case circuit breaker; 12. DC fan two; 13. IGBT module; 14. Heat sink; 15. Filter inductor; 16. Grid-side inductor board; 17. Mylar membrane. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0029] The following embodiments are implemented based on the technical solution of this utility model, providing detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments. Unless otherwise specified, the methods used in the following embodiments are conventional methods.

[0030] Example 1:

[0031] See Figures 1-6An AC / DC power module for a 10kV flexible multi-feeder device is disclosed. The AC / DC power module includes a heating unit, a heat sink 14, a control and protection unit, a DC fan 4, and a DC fan 12. The outer shell is a frame structure, and a shielding plate divides the outer shell into upper and lower layers. The control and protection unit and the DC fan 4 are fixedly installed on the upper layer of the shielding plate; the heating unit, the heat sink 14, and the DC fan 12 are fixedly installed on the lower layer of the shielding plate. The shielding plate is a sheet metal part, which is connected to the outer shell body through L-shaped corner fittings. The outer shell adopts a screw-on structure for easy disassembly.

[0032] See Figure 5 The heating unit includes an IGBT module 13, a filter inductor 15, and a grid-side inductor board 16. The filter inductor 15 is connected to the IGBT power board 3 and is located behind the heat sink 14. The grid-side inductor board 16 is connected to the filter inductor 15 and is located behind the filter inductor 15. A second DC fan 12 is located in front of the IGBT module 13, and the heat sink 14 is located behind the second DC fan 12. The IGBT module 13 is fixedly mounted on the heat sink 14. The heating unit and the heat sink 14 form an independent heat dissipation airflow channel. The second DC fan 12 prioritizes heat dissipation for the IGBT heat sink 14. The filter inductor 15 and the grid-side inductor board 16 are installed at the rear of the heat sink 14. After the air blows over the heat sink 14, it continues to dissipate heat for the filter inductor 15 and the grid-side inductor board 16. Placing the heating unit in the lower layer of the AC / DC power module for centralized heat dissipation saves space, meets the heat dissipation requirements of the components, and has low energy consumption.

[0033] See Figure 4 The control and protection unit includes a power board 5, an IGBT power board 3, a DC contactor 6, a DC Hall sensor 7, a DC fuse 8, a DC molded case circuit breaker 9, and an AC molded case circuit breaker 11. The AC molded case circuit breaker 11 and the DC molded case circuit breaker 9 are located on the rear side of the power board 5. The DC contactor 6 and the DC Hall sensor 7 are sequentially arranged on the upper part of the power board 5. The AC input and DC output sides of the AC / DC power module are respectively equipped with the DC Hall sensor 7 and the DC molded case circuit breaker 9, which can monitor the operating status of the AC / DC power module in real time. In case of a fault, the connection between the power module and the main circuit can be promptly disconnected for easy inspection and maintenance. A DC fuse 8 is installed on the rear side of the DC Hall sensor 7, and DC fuses 8 are installed on both the positive and negative terminals of the DC output side of the AC / DC power module to better protect the AC / DC power module components from overcurrent damage. The power board 5 is located in the middle of the upper layer of the shielding plate, and the IGBT power board 3 is located on the front side of the power board 5. The DC fan 4 is located on the rear side of the IGBT power board 3. The DC fan 4 is used to provide air cooling for the control and protection unit to ensure that the components and boards are not damaged due to overheating.

[0034] The control and protection unit and DC fan 14 are fixedly installed on the upper layer of the shielding plate; the heating unit, radiator 14, and DC fan 2 12 are fixedly installed on the lower layer of the shielding plate. This arrangement saves space and reduces the size of the AC / DC power module. IGBT module 13, filter inductor 15, DC fan 2 12, DC fan 14, DC contactor 6, DC fuse 8, DC molded case circuit breaker 9, and AC molded case circuit breaker 11 are connected by copper busbars. Mylar film 17 is installed under the IGBT power board 3, power board 5, and grid-side inductor board 16 to improve the insulation effect of the IGBT power board 3, power board 5, and grid-side inductor board 16.

[0035] The housing includes a front panel and a rear cover. Indicator light board 2 is fixedly mounted on the front panel and is connected to IGBT power board 3. It can display the status of power supply, operation, fault and communication. Interface board 10 is fixedly mounted on the rear cover and is connected to power board 5 and IGBT power board 3. Interface board 10 transmits the control signals of power board 5 and IGBT power board 3 to the control system through two RS485 / POF optical fibers. The control system is used to drive the power unit to operate. This connection method has good stability, reduces the number of connectors and connecting wires, and is easy to maintain.

[0036] This utility model's shielding plate divides the outer shell into upper and lower layers. The control and protection unit and DC fan 14 are fixedly installed on the upper layer of the shielding plate; the heating unit, heat sink 14, and DC fan 212 are fixedly installed on the lower layer of the shielding plate, saving space and reducing the module's size. The use of the shielding plate ensures the stable operation of the control and protection unit's components and improves the control and protection unit's anti-interference capability. The DC fan 1 is installed on the upper layer of the AC / DC power module to dissipate heat from the upper-layer components, ensuring that the components and boards are not damaged due to overheating. The DC fan 212 prioritizes heat dissipation from the IGBT heat sink 14, and a filter inductor 15 and a mesh are installed at the rear of the heat sink 14. The side inductor plate 16, after the air blows over the heat sink 14, continues to dissipate heat for the filter inductor 15 and the grid-side inductor plate 16. The heat-generating unit is placed in the lower layer of the AC / DC power module for centralized heat dissipation. This structure saves space, meets the heat dissipation requirements of the components, and has low energy consumption. The AC / DC power module is equipped with an AC molded case circuit breaker, a current transformer (integrated on the power board 5), and a fuse on the AC side, and a DC molded case circuit breaker, a DC Hall sensor, and a DC fuse on the DC side. It can monitor the operating status of the AC / DC power module in real time, and can protect and disconnect the connection between the AC / DC power module and the main circuit at any time according to the operating status, which is convenient for inspection and maintenance.

Claims

1. An AC / DC power module for a 10kV flexible multi-feeder system, characterized in that, The device includes a housing, a shielding plate, an AC / DC power module, an indicator light board, and an interface board. The housing has a frame structure, and the shielding plate divides the housing into upper and lower layers. The AC / DC power module includes a heating unit, a heat sink, a control and protection unit, a DC fan (first), and a DC fan (second). The control and protection unit and the DC fan (first) are fixedly installed on the upper layer of the shielding plate; the heating unit, the heat sink, and the DC fan (second) are fixedly installed on the lower layer of the shielding plate; and the indicator light board and the interface board are fixedly installed on the housing.

2. The AC / DC power module for a 10kV flexible multi-feeder device according to claim 1, characterized in that, The heating unit includes an IGBT module, a second DC fan is located on the front side of the IGBT module, and a heat sink is located on the rear side of the second DC fan. The IGBT module is fixedly mounted on the heat sink, and the heating unit and the heat sink form a heat dissipation channel.

3. The AC / DC power module for a 10kV flexible multi-feeder device according to claim 2, characterized in that, The heat-generating unit also includes a filter inductor and a mesh-side inductor plate. The filter inductor is located on the rear side of the heat sink, and the mesh-side inductor plate is located on the rear side of the filter inductor.

4. The AC / DC power module for a 10kV flexible multi-feeder device according to claim 1, characterized in that, The control and protection unit includes a power supply board and an IGBT power board. The power supply board is located in the middle of the upper layer of the shielding plate, and the IGBT power board is located on the front side of the power supply board. The DC fan is located on the rear side of the IGBT power board.

5. An AC / DC power module for a 10kV flexible multi-feeder device according to claim 4, characterized in that, The control and protection unit also includes a DC contactor, a DC Hall sensor, a DC fuse, a DC molded case circuit breaker, and an AC molded case circuit breaker. The AC molded case circuit breaker and the DC molded case circuit breaker are located on the rear side of the power supply board. The DC contactor and the DC Hall sensor are arranged sequentially on the upper part of the power supply board, and the DC fuse is located on the rear side of the DC Hall sensor.

6. An AC / DC power module for a 10kV flexible multi-feeder device according to claim 1, characterized in that, The housing includes a front panel and a rear cover, with the indicator light panel fixedly mounted on the front panel and the interface panel fixedly mounted on the rear cover.

7. An AC / DC power module for a 10kV flexible multi-feeder device according to claim 1, characterized in that, The shielding plate is a sheet metal part.

8. An AC / DC power module for a 10kV flexible multi-feeder device according to claim 1, characterized in that, The shielding plate is connected to the outer shell body by an L-shaped corner fitting, and the outer shell adopts a screw-on structure.

9. An AC / DC power module for a 10kV flexible multi-feeder device according to claim 4, characterized in that, Both the power board and the IGBT power board have a Mylar membrane underneath.

10. An AC / DC power module for a 10kV flexible multi-feeder device according to claim 3, characterized in that, A Mylar film is provided below the mesh-side inductor plate.

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