Power cabinet and wind power converter

Abstract

The present invention discloses a power cabinet, comprising a cabinet body, a machine-side inductor, a bus capacitor module, a machine-side power module, a grid-side power module, a grid-side inductor, a wind-water heat exchanger and a fan; the cabinet body comprises a first installation space, a second installation space and a third installation space arranged in an upper, middle and lower position; the machine-side inductor is installed in the first installation space; the machine-side power module, the grid-side power module and the bus capacitor module are installed in the second installation space, the bus capacitor module is installed in the rear of the second installation space, the machine-side power module and the grid-side power module are installed in the front of the second installation space, and the machine-side power module is installed above the grid-side power module; the grid-side inductor, the wind-water heat exchanger and the fan are installed in the third installation space; the power cabinet improves the power density and is designed as a reusable small system at the same time, and has the characteristics of low manufacturing cost, convenient maintenance, simple and reliable heat dissipation.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable energy power generation, and in particular to a power cabinet and a wind power converter. Background Art

[0002] With the rapid development of industrial technology, large-scale power electronic equipment is increasingly widely used in various industries; the power level and power density of the power cabinets used in converter equipment are also getting higher and higher, but while the power density is increasing, the size of the converter equipment is also getting larger, resulting in high manufacturing costs and subsequent installation and maintenance costs; at the same time, the power flow of the full-power converter in the existing technology is more circuitous, the inductor air duct is separated from the capacitor air duct, and the heat dissipation design is becoming more and more complicated.

[0003] In order to solve the above problems, the converter needs to improve the power density while requiring the converter power cabinet to become a small system with low manufacturing cost and convenient maintenance. The power circuit and inductance and capacitance in the system use the same air duct for heat dissipation, which is simple. Summary of the invention

[0004] The technical problem to be solved by the present invention is to propose a power cabinet, which improves the power density and is designed as a small system with low manufacturing cost and convenient maintenance. The power circuit and inductance and capacitance in the system adopt the same air duct for heat dissipation, and the heat dissipation is simple.

[0005] In order to solve the above technical problems, the present invention provides a power cabinet, including a cabinet body, a machine-side inductor, a busbar capacitor module, a machine-side power module, a grid-side power module, a grid-side inductor, a wind-water heat exchanger and a fan;

[0006] The cabinet body at least includes a first installation space, a second installation space and a third installation space arranged in upper, middle and lower positions;

[0007] The machine-side inductor includes an electrical connection terminal 1 and an electrical connection terminal 2;

[0008] The machine-side power module and the grid-side power module are both water-cooled power modules, and both include an AC connection terminal and a DC connection terminal;

[0009] The first installation space is provided with an organic side inductor;

[0010] The second installation space is installed with a machine-side power module, a grid-side power module and a bus capacitor module, the bus capacitor module is installed at the rear of the second installation space, the machine-side power module and the grid-side power module are installed at the front of the second installation space, and the machine-side power module is installed above the grid-side power module;

[0011] The third installation space is installed with a grid-side inductor, a wind-water heat exchanger and a fan 1; the wind-water heat exchanger is installed above the grid-side inductor, and the fan 1 is installed above the wind-water heat exchanger;

[0012] The heat dissipation duct inside the power cabinet is: starting from the lower part of the grid-side inductor, passing through the grid-side inductor, the wind-water heat exchanger, the fan 1, the bus capacitor module, the machine-side inductor, the machine-side power module, the grid-side power module in sequence, and returning to the lower part of the grid-side inductor to form a closed circulation path.

[0013] The electrical connections inside the power cabinet are as follows: external electrical connection terminal 1 is connected to electrical connection terminal 1 of the machine-side inductor, electrical connection terminal 2 of the machine-side inductor is connected to the AC connection terminal of the machine-side power module, the DC connection terminal of the machine-side power module, the DC connection terminal of the grid-side power module and the electrical connection terminal of the bus capacitor module are connected, the AC connection terminal of the grid-side power module is connected to electrical connection terminal 1 of the grid-side inductor, and the electrical connection terminal 2 of the grid-side inductor is connected to external electrical connection terminal 2.

[0014] Preferably, a second cooling fan for enhancing the air pressure and air flow in the air duct is installed above or on the side of the machine-side inductor.

[0015] Preferably, a grid-side fuse assembly is provided in the power cabinet, and the grid-side fuse assembly includes two electrical connection ends, and the grid-side fuse assembly is electrically connected between the AC power connection end of the grid-side power module and the grid-side inductor electrical connection end 1, or between the grid-side inductor electrical connection end 2 and the external electrical connection end 2.

[0016] Preferably, the power cabinet further includes a chopper power module, the chopper power module is installed in the first installation space, and the bus capacitor module is electrically connected to the chopper power module.

[0017] Preferably, the power cabinet further includes a chopper power module and a chopper resistor, the chopper power module and the chopper resistor are installed in the first installation space, and the chopper power module, the chopper resistor and the bus capacitor module are electrically connected to each other.

[0018] Preferably, the power cabinet further comprises an RC component for absorbing voltage spikes, wherein the RC component comprises a resistor and a capacitor; the RC absorption component is installed in the first installation space, and an electrical connection end of the RC component is connected to an electrical connection end of the machine-side inductor.

[0019] Preferably, an air guide component for limiting the wind flow direction and increasing the wind flow through the bus capacitor module is provided between the air outlet of the fan 1 and the air inlet of the bus capacitor module.

[0020] Preferably, an air guide component for limiting the wind flow direction and increasing the wind flow through the machine-side inductor is provided between the air outlet of the bus capacitor module and the air inlet of the machine-side inductor.

[0021] Preferably, the power cabinet also includes a water inlet pipe and a water outlet pipe; the machine-side power module, the grid-side power module, and the wind-water heat exchanger all include a water inlet and a water outlet, and the water inlets of the machine-side power module, the grid-side power module, and the wind-water heat exchanger are connected to the water channel joint of the water inlet pipe through a water pipe, and the water outlets of the machine-side power module, the grid-side power module, and the wind-water heat exchanger are connected to the water channel joint of the water outlet pipe through a water pipe.

[0022] In order to solve the above technical problem, the present invention further discloses a wind power converter, which includes the power cabinet mentioned above.

[0023] After adopting the above structure, the power cabinet includes a cabinet body, a machine-side inductor, a busbar capacitor module, a machine-side power module, a grid-side power module, a grid-side inductor, a wind-water heat exchanger and a fan;

[0024] The cabinet body at least includes a first installation space, a second installation space and a third installation space arranged in upper, middle and lower positions;

[0025] The machine-side inductor includes an electrical connection terminal 1 and an electrical connection terminal 2;

[0026] The machine-side power module and the grid-side power module are both water-cooled power modules, and both include an AC connection terminal and a DC connection terminal;

[0027] The first installation space is provided with an organic side inductor;

[0028] The second installation space is installed with a machine-side power module, a grid-side power module and a bus capacitor module, the bus capacitor module is installed at the rear of the second installation space, the machine-side power module and the grid-side power module are installed at the front of the second installation space, and the machine-side power module is installed above the grid-side power module;

[0029] The third installation space is installed with a grid-side inductor, a wind-water heat exchanger and a fan 1; the wind-water heat exchanger is installed above the grid-side inductor, and the fan 1 is installed above the wind-water heat exchanger; the heat dissipation duct inside the power cabinet is: starting from the lower part of the grid-side inductor, passing through the grid-side inductor, the wind-water heat exchanger, the fan 1, the bus capacitor module, the machine-side inductor, the machine-side power module, the grid-side power module in turn, and returning to the lower part of the grid-side inductor to form a closed loop path; the electrical connection inside the power cabinet is: the external electrical connection terminal 1 is connected to the electrical connection terminal of the machine-side inductor The first electrical connection terminal is connected, the second electrical connection terminal of the machine-side inductor is connected to the AC connection terminal of the machine-side power module, the DC connection terminal of the machine-side power module, the DC connection terminal of the grid-side power module and the electrical connection terminal of the bus capacitor module are connected, the AC connection terminal of the grid-side power module is connected to the first electrical connection terminal of the grid-side inductor, and the second electrical connection terminal of the grid-side inductor is connected to the second external electrical connection terminal; the power cabinet improves the power density and designs the power cabinet into a small system at the same time, with low manufacturing cost and convenient maintenance. The power circuit in the system and the inductor and capacitor adopt the same air duct for heat dissipation, and the heat dissipation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of a converter power cabinet in the prior art;

[0031] Figure 2 It is the overall structure diagram of the power cabinet of the present invention;

[0032] Figure 3 It is a heat dissipation path diagram of the air duct of the power cabinet of the present invention;

[0033] Figure 4 This is a structural diagram of a second embodiment of a power cabinet of the present invention;

[0034] Figure 5 This is a structural diagram of Embodiment 3 of the power cabinet of the present invention;

[0035] Figure 6 This is a structural diagram of Embodiment 5 of the power of the present invention;

[0036] Figure 7 This is a structural diagram of the water channel structure of the sixth embodiment of the power cabinet of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Embodiment 1

[0039] See also Figure 2 , Figure 2 The overall structure diagram of the power cabinet of the present invention. This embodiment discloses a power cabinet, including a cabinet body, a machine-side inductor, a busbar capacitor module, a machine-side power module, a grid-side power module, a grid-side inductor, a wind-water heat exchanger and a fan;

[0040] The cabinet body at least includes a first installation space, a second installation space and a third installation space arranged in upper, middle and lower positions;

[0041] The machine-side inductor includes an electrical connection terminal 1 and an electrical connection terminal 2;

[0042] The machine-side power module and the grid-side power module are both water-cooled power modules, and both include an AC connection terminal and a DC connection terminal;

[0043] The first installation space is provided with an organic side inductor;

[0044] The second installation space is installed with a machine-side power module, a grid-side power module and a bus capacitor module, the bus capacitor module is installed at the rear of the second installation space, the machine-side power module and the grid-side power module are installed at the front of the second installation space, and the machine-side power module is installed above the grid-side power module;

[0045] The third installation space is installed with a grid-side inductor, a wind-water heat exchanger and a fan 1; the wind-water heat exchanger is installed above the grid-side inductor, and the fan 1 is installed above the wind-water heat exchanger;

[0046] The heat dissipation duct inside the power cabinet is: starting from the lower part of the grid-side inductor, passing through the grid-side inductor, the wind-water heat exchanger, the fan 1, the bus capacitor module, the machine-side inductor, the machine-side power module, the grid-side power module in sequence, and returning to the lower part of the grid-side inductor to form a closed circulation path.

[0047] The electrical connections inside the power cabinet are as follows: external electrical connection terminal 1 is connected to electrical connection terminal 1 of the machine-side inductor, electrical connection terminal 2 of the machine-side inductor is connected to the AC connection terminal of the machine-side power module, the DC connection terminal of the machine-side power module, the DC connection terminal of the grid-side power module and the electrical connection terminal of the bus capacitor module are connected, the AC connection terminal of the grid-side power module is connected to electrical connection terminal 1 of the grid-side inductor, and the electrical connection terminal 2 of the grid-side inductor is connected to external electrical connection terminal 2.

[0048] In this embodiment, the power flow layout inside the power cabinet is always guaranteed to be a straight line from output to input, ensuring that the power flow length is the shortest. The output and input ends of the power cabinet can be interchanged up and down by adjusting the position of the components. The power cabinet adopts modular layered assembly inside, which has low assembly difficulty and low cost.

[0049] Embodiment 2

[0050] See also Figure 4 , Figure 4 2 is a structural diagram of a second embodiment of a power cabinet of the present invention; in this embodiment, a cooling fan 8 for enhancing the air pressure and air flow in the air duct is installed above or on the side of the machine-side inductor.

[0051] Embodiment 3

[0052] See also Figure 5 , Figure 5 It is a structural diagram of the third embodiment of the power cabinet of the present invention; in this embodiment, a grid-side fuse assembly 9 is arranged in the power cabinet, and the grid-side fuse assembly 9 includes two electrical connection ends, and the grid-side fuse assembly 9 is electrically connected between the AC power connection end of the grid-side power module 4 and the first electrical connection end of the grid-side inductor 5, or between the second electrical connection end of the grid-side inductor 5 and the second external electrical connection end.

[0053] Embodiment 4

[0054] In this embodiment, the power cabinet further includes a chopping power module 10, the chopping power module 10 is installed in the first installation space, and the bus capacitor module 2 is electrically connected to the chopping power module 10.

[0055] Embodiment 5

[0056] See also Figure 6 , Figure 6 It is a structural diagram of embodiment 5 of the power of the present invention; in this embodiment, the power cabinet also includes a chopper power module 10 and a chopper resistor 11, the chopper power module 10 and the chopper resistor 11 are installed in the first installation space, and the chopper power module 10, the chopper resistor 11 and the bus capacitor module 2 are electrically connected to each other.

[0057] In this embodiment, a chopper power module 25 and a chopper resistor 26 are integrated in the power cabinet. The chopper power module 25 and the chopper resistor 26 serve as a power unit to improve the overall power density of the entire power cabinet.

[0058] Embodiment 6

[0059] In this embodiment, the power cabinet also includes an RC absorption component 12, which includes a power resistor and a film capacitor; the RC absorption component 12 is arranged on the machine-side inductor 1, and the electrical connection end of the RC absorption component is connected to the electrical connection end of the machine-side inductor 1.

[0060] In this embodiment, an RC absorption component is also integrated in the power cabinet. The RC absorption component serves as a power unit to improve the overall power density of the entire power cabinet.

[0061] Embodiment 7

[0062] In this embodiment, an air guide component for limiting the wind flow direction and increasing the wind flow through the bus capacitor module 2 is provided between the air outlet of the fan 7 and the air inlet of the bus capacitor module 2; or an air guide component for limiting the wind flow direction and increasing the wind flow through the machine-side inductor 1 is provided between the air outlet of the bus capacitor module 2 and the air inlet of the machine-side inductor 1; thereby improving the overall heat dissipation effect of the entire power cabinet.

[0063] Embodiment 8

[0064] See also Figure 7 , Figure 7 A structural diagram of a water channel structure of a sixth embodiment of a power cabinet of the present invention;

[0065] In the present embodiment, the power cabinet also includes a water inlet pipe (13) and a water outlet pipe (14); the machine-side power module 3, the grid-side power module 4, and the wind-water heat exchanger 6 all include a water inlet and a water outlet, and the water inlets of the machine-side power module 3, the grid-side power module 4, and the wind-water heat exchanger 6 are connected to the waterway joint 15 of the water inlet pipe 13 through a water pipe, and the water outlets of the machine-side power module 3, the grid-side power module 4, and the wind-water heat exchanger 6 are connected to the waterway joint 16 of the water outlet pipe 14 through a water pipe.

[0066] The water channel design of the power cabinet of this embodiment can provide water cooling for the entire power cabinet, especially the machine-side power module 3 and the grid-side power module 4. The components in the power cabinet, especially the machine-side power module 3 and the grid-side power module, are water-cooled. Therefore, each component is designed with a water inlet and a water outlet. The water inlet and the water outlet need to be connected to a water pipe. The water channel design inside the power cabinet facilitates the connection of the water inlet and the water outlet of each component of the power cabinet to the water pipe for heat dissipation. There is no need to connect the water inlet and the water outlet of each component to the water pipe outside the power cabinet. The design is more reasonable and more convenient to use and maintain.

[0067] Embodiment 9

[0068] This embodiment discloses a wind power converter, which includes a power cabinet as described in any one of Embodiments 1 to 8.

[0069] The power cabinet improves the power density and is designed as a small system at the same time, with low manufacturing cost and convenient maintenance. The power circuit, inductor and capacitor in the system adopt the same air duct for heat dissipation, and the heat dissipation is simple.

[0070] It should be understood that the above are only preferred embodiments of the present invention, and the patent scope of the present invention cannot be limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A power cabinet, characterized in that: It includes a cabinet body, a machine-side inductor (1), a busbar capacitor module (2), a machine-side power module (3), a grid-side power module (4), a grid-side inductor (5), a wind-water heat exchanger (6) and a fan (7); The cabinet body at least includes a first installation space, a second installation space and a third installation space arranged in upper, middle and lower positions; The machine-side inductor (1) comprises a first electrical connection terminal and a second electrical connection terminal; The machine-side power module (3) and the grid-side power module (4) are both water-cooled power modules, and both include an AC power connection terminal and a DC power connection terminal; The first installation space is provided with an organic side inductor (1); The second installation space is installed with a machine-side power module (3), a grid-side power module (4) and a bus capacitor module (2), the bus capacitor module (2) being installed at the rear of the second installation space, the machine-side power module (3) and the grid-side power module (4) being installed at the front of the second installation space, and the machine-side power module (3) being installed above the grid-side power module (4); The third installation space is installed with a grid-side inductor (5), a wind-water heat exchanger (6) and a fan 1 (7); the wind-water heat exchanger (6) is installed above the grid-side inductor (5), and the fan 1 (7) is installed above the wind-water heat exchanger (6); The heat dissipation air duct inside the power cabinet is: starting from the lower part of the grid-side inductor (5), passing through the grid-side inductor (5), the wind-water heat exchanger (6), the fan 1 (7), the busbar capacitor module (2), the machine-side inductor (1), the machine-side power module (3), the grid-side power module (4), and returning to the lower part of the grid-side inductor (5), forming a closed circulation path; The electrical connection inside the power cabinet is as follows: an external electrical connection terminal 1 is connected to an electrical connection terminal 1 of the machine-side inductor (1), an electrical connection terminal 2 of the machine-side inductor (1) is connected to an AC connection terminal of the machine-side power module (3), a DC connection terminal of the machine-side power module (3), a DC connection terminal of a grid-side power module (4) and an electrical connection terminal of a bus capacitor module (2) are connected, an AC connection terminal of the grid-side power module (4) is connected to an electrical connection terminal 1 of the grid-side inductor (5), and an electrical connection terminal 2 of the grid-side inductor (5) is connected to an external electrical connection terminal 2.

2. The power cabinet according to claim 1, characterized in that: A second cooling fan (8) is installed above or on the side of the machine-side inductor (1) to increase the wind pressure and wind flow in the air duct.

3. The power cabinet according to claim 1, characterized in that: A grid-side fuse assembly (9) is arranged in the power cabinet, and the grid-side fuse assembly (9) comprises two electrical connection ends, and the grid-side fuse assembly (9) is electrically connected between the AC power connection end of the grid-side power module (4) and the first electrical connection end of the grid-side inductor (5), or between the second electrical connection end of the grid-side inductor (5) and the second external electrical connection end.

4. The power cabinet according to claim 1, characterized in that: The power cabinet further comprises a chopping power module (10), the chopping power module (10) being installed in the first installation space, and the busbar capacitor module (2) being electrically connected to the chopping power module (10).

5. The power cabinet according to claim 1, characterized in that: The power cabinet further comprises a chopper power module (10) and a chopper resistor (11); the chopper power module (10) and the chopper resistor (11) are installed in the first installation space; the chopper power module (10), the chopper resistor (11) and the bus capacitor module (2) are electrically connected to each other.

6. The power cabinet according to claim 1, characterized in that: The power cabinet further comprises an RC component (12) for absorbing voltage spikes, the RC component (12) comprising a resistor and a capacitor; the RC component (12) is installed in the first installation space, and an electrical connection end of the RC component (12) is connected to an electrical connection end of the machine-side inductor (1).

7. The power cabinet according to claim 1, characterized in that: An air guide component for limiting the wind flow direction and increasing the wind flow through the bus capacitor module (2) is provided between the air outlet of the fan 1 (7) and the air inlet of the bus capacitor module (2).

8. The power cabinet according to claim 1, characterized in that: An air guide component for limiting the wind flow direction and increasing the wind flow rate passing through the machine-side inductor (1) is provided between the air outlet of the busbar capacitor module (2) and the air inlet of the machine-side inductor (1).

9. The power cabinet according to claim 1, characterized in that: The power cabinet further comprises a water inlet pipe (13) and a water outlet pipe (14); the machine-side power module (3), the grid-side power module (4), and the wind-water heat exchanger (6) all comprise a water inlet and a water outlet; the water inlets of the machine-side power module (3), the grid-side power module (4), and the wind-water heat exchanger (6) are connected to a water channel joint (15) of the water inlet pipe (13) via a water pipe, and the water outlets of the machine-side power module (3), the grid-side power module (4), and the wind-water heat exchanger (6) are connected to a water channel joint (16) of the water outlet pipe (14) via a water pipe.

10. A wind power converter, characterized in that: The wind power converter comprises the power cabinet described in any one of claims 1 to 9.

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