Converter structure

Abstract

The invention relates to electrical equipment, in particular to a converter structure, which specifically comprises a shell, the interior of the shell is divided into a direct current module mounting area, an alternating current module mounting area, a power conversion module mounting area and a secondary control and electrical mounting area by partition plates, and the converter structure further comprises a heat dissipation device, the heat dissipation device comprises an electric reactor outer wind scooper, an air supply duct, an air bellow and a fan, the electric reactor outer wind scooper is a hollow shell, the alternating current module installation area comprises an electric reactor, the electric reactor outer wind scooper is arranged outside the electric reactor, the upper end of the electric reactor outer wind scooper is communicated with the air supply duct, and the lower end of the electric reactor outer wind scooper is communicated with the air supply duct. The upper end of the air supply duct is communicated with the air bellow, and the fan is arranged at the top of the air bellow. According to the invention, each partition adopts a modular design, the installation and maintenance are convenient, and the cost is low.

Description

Technical Field

[0001] The invention relates to an electrical device, in particular to a converter structure. Background Art

[0002] The existing converter structure, due to the large number of electronic components, not only makes the installation process cumbersome and the error rate high, but also has high design and production costs and inconvenient maintenance; and the heat dissipation device of the existing energy storage converter has problems such as complex structure, low assembly efficiency, and poor heat dissipation effect. Some of them adopt liquid cooling, and there is also the problem of condensed water affecting electrical insulation; in addition, with the increase of energy storage installed capacity, new requirements are put forward for the power conversion unit of energy storage installed capacity. The existing energy storage converter is designed for different capacity projects, that is, a model of product is required to match, resulting in excessively high design and production costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a converter structure with modular design for each partition, convenient installation and maintenance, and low cost.

[0004] In order to solve the above technical problems, this application provides the following technical solutions:

[0005] The present invention discloses a converter structure, comprising a shell, wherein the shell is divided into a DC module installation area, an AC module installation area, a power conversion module installation area, and a secondary control and electrical installation area by a partition.

[0006] Furthermore, it also includes a heat dissipation device, which includes an outer air guide cover of the reactor, an air supply duct, a bellows, and a fan. The outer air guide cover of the reactor is a hollow shell. The AC module installation area includes a reactor. The outer air guide cover of the reactor is arranged outside the reactor. The upper end of the outer air guide cover of the reactor is connected to the air supply duct, and the upper end of the air supply duct is connected to the bellows. The fan is arranged on the top of the bellows.

[0007] Furthermore, the length of the air supply duct is adjustable.

[0008] Furthermore, the air supply duct includes a first air supply duct element and a second air supply duct element, the first air supply duct element is arranged in the inner cavity of the second air supply duct element, the first air supply duct element is suitable for moving along the length direction relative to the second air supply duct element, the upper end of the first air supply duct element is connected to the inner cavity of the bellows, and the lower end of the second air supply duct element is connected to the inner cavity of the air guide cover outside the reactor.

[0009] Furthermore, the side wall of the second air supply duct element is provided with an oblong hole extending along the length direction, and the side wall of the first air supply duct element is provided with a pin, and the pin is arranged in the oblong hole.

[0010] Furthermore, the heat dissipation device also includes an air guide plate, which includes a top plate and two bottom plates, the top plate and the two bottom plates form an inverted U shape, the two bottom plates are respectively connected to the two ends of the top plate, the bottom of the two bottom plates are connected to the top of the bellows, the top air outlet of the bellows is located between the two bottom plates, and the fan is arranged on the top plate.

[0011] Furthermore, it also includes a power conversion unit, the power conversion unit includes heat dissipation fins, the bellows includes a bellows front plate, the bellows front plate is provided with a mounting hole, the power conversion unit is connected to the mounting hole, and the heat dissipation fins are placed in the bellows.

[0012] Furthermore, the power conversion unit also includes a power module and a power conversion unit heat dissipation device, the power conversion unit heat dissipation device includes an upper support plate, a thermal pad, a thermal insulation pad, and a heat pipe, the upper support plate is made of a thermally conductive material, the power module is arranged on the top surface of the upper support plate, the thermal pad is connected to the bottom surface of the upper support plate, the heat pipe is arranged below the thermal pad, the thermal insulation pad is arranged below the heat pipe, and the heat dissipation fins are connected to one side of the heat pipe.

[0013] Furthermore, a thermal conductive gel is coated on the bottom surface of the power module.

[0014] Furthermore, the support plate is a metal plate, the thermal conductive pad is a silicone pad, and the thermal insulation pad is made of thermal insulation cotton.

[0015] Compared with the prior art, the converter structure of the present invention has at least the following beneficial effects:

[0016] The present invention provides a converter structure, in which a shell is divided into a DC module installation area, an AC module installation area, a power conversion module installation area, and a secondary control and electrical installation area by a partition. Each partition adopts a modular design, which makes installation and maintenance more convenient, and has low design and production costs. At the same time, the production and delivery cycle is reduced, and each module adopts a standardized design, so the quality is more guaranteed.

[0017] The structure of the converter of the present invention is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the appearance structure of the converter structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the converter structure of the present invention after removing the front plate and the right side plate;

[0020] Figure 3 This is a front view of the converter structure of the present invention after removing the front plate;

[0021] Figure 4 It is a right side view of the converter structure of the present invention after removing the side sealing plate;

[0022] Figure 5 It is a left side view of the converter structure of the present invention after removing the side sealing plate;

[0023] Figure 6 It is a left view of the converter structure of the present invention after removing the side sealing plate and the side protection plate of the DC module installation area;

[0024] Figure 7 It is a partial front view of the converter structure of the present invention after removing the front plate;

[0025] Figure 8 is a structural diagram of a heat dissipation device in a converter structure of the present invention;

[0026] Fig. 9 It is a structural diagram of the air supply duct in the converter structure of the present invention;

[0027] Fig.10 A schematic diagram of the wind direction of the heat dissipation device in the converter structure of the present invention;

[0028] Fig.11 It is a structural schematic diagram of a power conversion unit in the converter structure of the present invention;

[0029] Fig.12 It is a structural schematic diagram of a heat dissipation device of a power conversion unit in a converter structure of the present invention;

[0030] Fig.13 It is a structural schematic diagram of a typical boost inverter integrated cabin equipped with two converter structures of the present invention;

[0031] Fig.14 It is a schematic diagram of the structure of a typical boost inverter integrated cabin equipped with four converter structures of the present invention. DETAILED DESCRIPTION

[0032] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, a converter structure of the present invention includes a shell 01, the shell 01 includes a frame, a front plate connected to the frame, a rear plate, a side sealing plate, a top plate and a mounting base, the front plate, the rear plate, the side sealing plate, the top plate and the mounting base form a closed cavity, the front plate includes a first front door and a second front door, the rear plate includes a first rear door and a second rear door, the first front door, the second front door, the first rear door, the second rear door and the side sealing plate are all provided with shutters 10, the shell 01 is divided into a DC module installation area 11, an AC module installation area 12, a power conversion module installation area 13, and a secondary control and electrical installation area 14 by a partition, the DC module installation area 11 is provided with a DC module installation area front protection plate 111, a DC module installation area side protection plate 112, a DC side circuit breaker switch 113, a DC side copper busbar 114, a DC side electrical component connection bar 115, a DC input copper busbar positive 11 6. DC output copper busbar 117, DC fuse 118, DC side Hall sensor 119; AC module installation area 12 is provided with AC side circuit breaker switch 121, reactor 122, filter capacitor 123, AC side copper busbar 124, AC side electrical component connection bar 125, AC A phase output bar 126, AC B phase output bar 127, AC C phase output bar 128; power conversion module installation area 13 is provided with power conversion module protection plate 131, power conversion module protection plate is provided with handle 132, weight reduction vent 133, handle 132 is convenient for installation and disassembly, weight reduction vent 133 is conducive to heat dissipation on the one hand, and protects high voltage electricity from the risk of electric shock on the other hand, while reducing weight; secondary control and electrical installation area 14 is arranged with equipment-related control circuit boards and protective circuit breakers, relays, sockets, terminals, etc. of the secondary circuits in the cabinet. In the converter structure of the present invention, the shell 01 is divided into a DC module installation area 11, an AC module installation area 12, a power conversion module installation area 13, and a secondary control and electrical installation area 14 by a partition. Each partition adopts a modular design, which makes installation and maintenance more convenient, and the design cost and production cost are low. At the same time, the production and delivery cycle is reduced, and each module adopts a standardized design, so the quality is more guaranteed.

[0033] Alternatively, if Figure 1 , Figure 2 , Figure 8 , Fig.10As shown, a converter structure of the present invention also includes a heat sink 02, which includes an outer air duct 21 of the reactor, an air supply duct 22, a bellows 23, and a fan 24. The outer air duct 21 of the reactor is a hollow shell, and the AC module installation area 12 includes a reactor 122. The outer air duct 21 of the reactor is arranged outside the reactor 122, and the upper end of the outer air duct 21 of the reactor is connected to the air supply duct 22, and the upper end of the air supply duct 22 is connected to the bellows 23, and the fan 24 is arranged on the top of the bellows 23. Specifically, an upper exhaust chamber 16 is arranged on the top of the shell 01, and a ventilation shutter is arranged on the side wall of the upper exhaust chamber 16, and the fan 24 is arranged in the upper exhaust chamber 16. The outer air duct 21 of the reactor is made of insulating material. In this embodiment, the outer air duct 21 of the reactor is assembled with resin plates, which has good insulation performance, light weight and high strength. The main heat generating device of the converter structure of the present invention is the reactor 122. Under the action of the fan 24, a negative pressure is formed inside the air supply duct 22, so that the air entering the inner cavity of the shell 01 from the louver enters the reactor outer air duct 21, enters the top exhaust chamber 16 through the air supply duct 22 and the bellows 23, and is discharged through the louver on the upper exhaust chamber 16, so that the temperature inside the shell 01 drops. The reactor outer air duct 21 is set outside the main heating element reactor 122, and the heat generated by the reactor 122 is limited to the reactor outer air duct 21, and is discharged through the fan 24 and the air supply duct 22, with high heat dissipation efficiency and convenient installation and maintenance.

[0034] Optionally, the length of the air supply duct 22 is adjustable, and a heat insulation layer is pasted around the air supply duct 22 to prevent the high temperature in the air supply duct 22 from radiating heat to the outside, while ensuring the electrical insulation between the electrical appliances in the cabinet and the sheet metal of the air supply duct; the length of the air supply duct 22 is adjustable, which can better eliminate installation errors in the height direction and facilitate installation.

[0035] Alternatively, if Fig. 9 As shown, the air supply duct 22 includes a first air supply duct element 221 and a second air supply duct element 222. The first air supply duct element 221 is disposed in the inner cavity of the second air supply duct element 222. The first air supply duct element 221 is adapted to move relative to the second air supply duct element 222 along the length direction. The upper end of the first air supply duct element 221 is connected to the inner cavity of the wind box 23, and the lower end of the second air supply duct element 222 is connected to the inner cavity of the reactor outer air guide cover 21. Specifically, the cross-sections of the first air supply duct element 221 and the second air supply duct element 222 are both square, and a gap is left between the first air supply duct element 221 and the second air supply duct element 222, so as to facilitate the first air supply duct element 221 to move relative to the second air supply duct element 222 along the length direction.

[0036] Optionally, the two side walls of the second air supply duct element 222 are respectively provided with an oblong hole extending in the length direction, and the two side walls of the first air supply duct element 221 are respectively provided with a pin, and a pin is set in an oblong hole. When the first air supply duct element 221 moves relative to the second air supply duct element 222 in the length direction, the pin moves in the oblong hole. By providing the pin and the oblong hole, it is ensured that the first air supply duct element 221 can move relative to the second air supply duct element 222 in the length direction to avoid deviation. The upper end of the first air supply duct element 221 is connected to the bottom side plate of the air box 23, and the lower end of the second air supply duct element 222 is connected to the top sealing plate of the outer air guide cover 21 of the reactor.

[0037] Optionally, the heat dissipation device 02 further includes an air guide plate 25, which includes a top plate and two bottom plates, the top plate and the two bottom plates form an inverted U shape, the two bottom plates are respectively connected to the two ends of the top plate, the bottoms of the two bottom plates are connected to the top of the wind box 23, the top air outlet of the wind box 23 is located between the two bottom plates, and the fan 24 is arranged on the top plate. Specifically, the fan 24 is an axial flow fan.

[0038] Alternatively, if Figure 8 , Fig.11 , Fig.12 As shown, the cabinet further includes a power conversion unit 15, the power conversion unit 15 includes a heat dissipation fin 151, the bellows 23 includes a bellows front plate 231, the bellows front plate 231 is provided with a mounting hole, the power conversion unit 15 is connected to the mounting hole, and the heat dissipation fin 151 is placed in the bellows 23. A large amount of heat generated by the power conversion unit 15 is discharged out of the cabinet through the heat dissipation fin 151, the bellows 23, and the fan 24. The power conversion unit 15 shares the reactor heat dissipation duct, which has a simple structure and high heat dissipation efficiency, avoiding short circuit of air flow in the cabinet, poor heat dissipation, and avoiding the occurrence of problems such as insulation affected by condensed water due to liquid cooling. The bellows 23 further includes a bellows rear plate 232, a bellows left plate 233, a bellows right plate 234, a bellows bottom plate 235, and a bellows top plate 236, which are connected to each other. The bellows bottom plate 235 is provided with an air port corresponding to the air supply duct 22, and the bellows top plate 236 is provided with an air guide port 2361. The bellows top plate 236 is a partition between the housing 01 and the upper exhaust chamber 16. Specifically, it further includes a reinforcing beam 237, which is connected to the housing 01, and the bellows front plate 231, the bellows rear plate 232, and the bellows top plate 236 are all connected to the reinforcing beam 237.

[0039] Optionally, the power conversion unit 15 also includes a power module 150 and a power conversion unit heat dissipation device, the power conversion unit heat dissipation device includes an upper support plate 152, a thermal pad 153, a thermal insulation pad 154, and a heat pipe 155. The upper support plate 152 is made of a thermally conductive material, the power module 150 is arranged on the top surface of the upper support plate 152, the thermal pad 153 is connected to the bottom surface of the upper support plate 152, the heat pipe 155 is arranged below the thermal pad 153, the thermal insulation pad 154 is arranged below the heat pipe 155, and the heat dissipation fin 151 is connected to one side of the heat pipe 154. Specifically, the bottom surface of the power module 150 is coated with a thermally conductive gel, the upper support plate 152 is a metal plate, the thermal pad 153 is a silicone pad, the thermal pad 153 is pasted on the upper support plate 152, and the thermal insulation pad 154 is made of thermal insulation cotton. The heat generated by the power module 150 is transferred to the heat sink 151 through the upper support plate 152, the thermal pad 153, and the heat pipe 155, and is quickly dissipated under the action of the fan airflow. The thermal insulation pad 154 prevents heat conduction, so that the heat generated by the power module 150 can only be transferred to the heat pipe 155 through the thermal pad 153. The power conversion unit 15 also includes a metal lower fixing plate 156, a power conversion unit support shell 157, a capacitor 158, and a power conversion unit copper bus 159.

[0040] The power of the converter structure of the present invention is 1.25MW. Based on the 1.25MW configuration, special configurations such as 2.5MW and 5MW can be made as needed. Fig.13 As shown, a typical boost inverter integrated cabin 03 includes 1002-connecting busbar bridge, 1003-cabin base, 1004-high and low voltage integrated chamber and two converter structures of the present invention, such as Fig.14 As shown, the typical boost inverter integrated cabin 04 includes four converter structures of the present invention. The converter structure of the present invention has a power of 1.25MW, and is configured based on 1.25MW. The capacity topology is easier and can better meet the market demand for converter power for short-term and long-term energy storage.

[0041] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A converter structure, characterized in that: The invention comprises a housing (01), wherein the housing (01) is divided into a DC module installation area (11), an AC module installation area (12), a power conversion module installation area (13), and a secondary control and electrical installation area (14) by a partition.

2. The converter structure according to claim 1, characterized in that: The invention also comprises a heat dissipation device (02), wherein the heat dissipation device (02) comprises an outer air guide cover (21) of the reactor, an air supply duct (22), a bellows (23), and a fan (24); the outer air guide cover (21) of the reactor is a hollow shell; the AC module installation area (12) comprises a reactor (122); the outer air guide cover (21) of the reactor is arranged outside the reactor (122); the upper end of the outer air guide cover (21) of the reactor is connected to the air supply duct (22); the upper end of the air supply duct (22) is connected to the bellows (23); and the fan (24) is arranged on the top of the bellows (23).

3. The converter structure according to claim 2, characterized in that: The air supply duct (22) is adjustable in length.

4. The converter structure according to claim 3, characterized in that: The air supply duct (22) comprises a first air supply duct element (221) and a second air supply duct element (222); the first air supply duct element (221) is arranged in the inner cavity of the second air supply duct element (222); the first air supply duct element (221) is suitable for moving relative to the second air supply duct element (222) along the length direction; the upper end of the first air supply duct element (221) is connected to the inner cavity of the bellows (23); and the lower end of the second air supply duct element (222) is connected to the inner cavity of the reactor outer air guide cover (21).

5. The converter structure according to claim 4, characterized in that: The side wall of the second air supply duct element (222) is provided with an oblong hole extending in the length direction, and the side wall of the first air supply duct element (221) is provided with a pin, and the pin is arranged in the oblong hole.

6. The converter structure according to claim 2, characterized in that: The heat dissipation device (02) also includes an air guide plate (25), the air guide plate (15) includes a top plate and two bottom plates, the top plate and the two bottom plates form an inverted U shape, the two bottom plates are respectively connected to the two ends of the top plate, the bottom of the two bottom plates are connected to the top of the bellows (23), the top air outlet of the bellows (23) is located between the two bottom plates, and the fan (24) is arranged on the top plate.

7. The converter structure according to claim 2, characterized in that: It also comprises a power conversion unit (15), the power conversion unit (15) comprising a heat dissipation fin (151), the bellows (23) comprising a bellows front plate (231), a mounting hole being provided on the bellows front plate (231), the power conversion unit (15) being connected to the mounting hole, and the heat dissipation fin (151) being disposed in the bellows (23).

8. The converter structure according to claim 7, characterized in that: The power conversion unit (15) further comprises a power module (150) and a power conversion unit heat dissipation device, wherein the power conversion unit heat dissipation device comprises an upper support plate (152), a thermal pad (153), a thermal insulation pad (154), and a heat pipe (155); the upper support plate (152) is made of a thermally conductive material; the power module (150) is arranged on the top surface of the upper support plate (152); the thermal pad (153) is connected to the bottom surface of the upper support plate (152); the heat pipe (155) is arranged below the thermal pad (153); the thermal insulation pad (154) is arranged below the heat pipe (155); and the heat dissipation fin (151) is connected to one side of the heat pipe (154).

9. The converter structure according to claim 8, characterized in that: The bottom surface of the power module (150) is coated with thermal conductive gel.

10. The converter structure according to claim 9, characterized in that: The support plate (152) is a metal plate, the thermal conductive pad (153) is a silicone pad, and the thermal insulation pad (154) is made of thermal insulation cotton.

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