Converter

Abstract

The utility model discloses a converter, which comprises a plurality of functional components, a first power cabinet, a coupling inductance cabinet, a second power cabinet, a first grid-connected cabinet, a capacitor cabinet and a second grid-connected cabinet, the plurality of functional assemblies comprise h PFC inductors, n network side modules, m machine side modules, a chopper resistor module, q coupling inductors, a first main circuit breaker module, a second main circuit breaker module, a first grid-connected contactor module, a second grid-connected contactor module and k groups of filter capacitor assemblies. The plurality of functional components are arranged in the first power cabinet, the coupling inductor cabinet, the second power cabinet, the first grid-connected cabinet, the capacitor cabinet and the second grid-connected cabinet according to functions; modularization is adopted in the converter to configure and assemble the power cabinet, the grid-connected cabinet, the capacitor cabinet and the inductance cabinet, the overall power density is high, the power flow length is short, and the overall conducting bar cost is low; the assembly difficulty is reduced, the field maintenance is convenient, the power module, the circuit breaker and the contactor are provided with multiple heat dissipation air channels, and the heat dissipation efficiency of the whole machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power, in particular to a converter. Background Art

[0002] With the rapid development of industrial technology, large-scale power electronic equipment is being used more and more widely in various industries. The power level and power density of converter equipment are also getting higher and higher. The installation scenarios exist from the tower base to the wind turbine nacelle. This requires the converter to have a compact structure, small size, high power density, highly integrated functions, and easy maintenance.

[0003] The existing converter needs to continuously increase its overall size when it needs to meet high power requirements, and its power density is low. Figure 1 As shown, multiple machine-side power modules and grid-side power modules are arranged vertically inside the converter. The larger the power converter, the larger the space occupied by the machine-side modules and grid-side modules in the length direction. The limited space makes it impossible to expand the power of the converter. At the same time, the power flow is too circuitous, the cost of the conductive bar of the whole machine is low, the internal components do not adopt a modular design, the converter is difficult to maintain, and the cabinet does not have sufficient heat dissipation ducts for the power modules, circuit breakers and contactors, resulting in poor heat dissipation efficiency and high heat dissipation cost of the whole machine. Utility Model Content

[0004] The technical problem to be solved by the utility model is to propose a converter, in which a power cabinet, a grid-connected cabinet, a capacitor cabinet and an inductor cabinet are configured and assembled in a modular manner. The power density of the whole machine is high, the power flow length is short, and the cost of the conductive bar of the whole machine is low; the assembly difficulty is reduced, and on-site maintenance is convenient; the power module, the circuit breaker and the contactor have multiple heat dissipation ducts, thereby improving the heat dissipation efficiency of the whole machine.

[0005] In order to solve the above technical problems, the utility model provides a converter, including several functional components and a first power cabinet, a coupled inductor cabinet, a second power cabinet, a first grid-connected cabinet, a capacitor cabinet, and a second grid-connected cabinet arranged from left to right; the several functional components include: h PFC inductors, n grid-side modules, m machine-side modules, a chopper resistor module, q coupled inductors, a first main circuit breaker module, a second main circuit breaker module, a first grid-connected contactor module, a second grid-connected contactor module, and k groups of filter capacitor components. The several functional components are arranged in the first power cabinet, the coupled inductor cabinet, the second power cabinet, the first grid-connected cabinet, the capacitor cabinet, and the second grid-connected cabinet according to their functions; wherein n≥2, m≥2, q≥1, and h≥1.

[0006] Preferably, h=2, h PFC inductors are: a first PFC inductor and a second PFC inductor; m=4, 4 machine-side modules are: a first machine-side module, a second machine-side module, a third machine-side module and a fourth machine-side module; n=2, 2 grid-side modules are: a first grid-side module and a second grid-side module; q=4, 4 coupling inductors are: a first coupling inductor, a second coupling inductor, a third coupling inductor and a fourth coupling inductor; the first PFC inductor is arranged at the bottom inside the first power cabinet, and the first machine-side module, the second machine-side module and the first grid-side module are arranged from top to bottom above the first PFC inductor; the first machine-side module , a bus capacitor module is arranged on the back of the second machine side module and the first grid side module; the first coupled inductor, the second coupled inductor, the third coupled inductor and the fourth coupled inductor are arranged at the lower part of the coupled inductor cabinet, and the chopper resistor module is arranged at the upper part of the coupled inductor cabinet; the second PFC inductor is arranged at the bottom of the second power cabinet, and the third machine side module, the fourth machine side module and the second grid side module are arranged from top to bottom above the second PFC inductor; a bus capacitor module is arranged on the back of the third machine side module, the fourth machine side module and the second grid side module.

[0007] Preferably, the AC ends of the first machine side module and the second machine side module are connected to the third coupled inductor and the fourth coupled inductor respectively, and the AC ends of the third machine side module and the fourth machine side module are connected to the first coupled inductor and the second coupled inductor respectively; the first PFC inductor is connected to the first grid side module, the second PFC inductor is connected to the second grid side module, and the third coupled inductor is connected to the second coupled inductor.

[0008] Preferably, the first coupled inductor and the second coupled inductor are packaged together to form a whole, and the two inductors are functionally independent of each other.

[0009] Preferably, the third coupled inductor and the fourth coupled inductor are packaged together to form a whole, and the two inductors are functionally independent of each other.

[0010] Preferably, the first main circuit breaker module and the first grid-connected contactor module are arranged inside the first grid-connected cabinet from top to bottom, and the second main circuit breaker module and the second grid-connected contactor module are arranged inside the second grid-connected cabinet from top to bottom.

[0011] Preferably, the k groups of filter capacitor components are arranged inside the capacitor cabinet from top to bottom, and the upper and lower groups of filter capacitor components are connected together.

[0012] Preferably, the capacitor cabinet is a heat dissipation circulation air duct for the first grid-connected cabinet and the second grid-connected cabinet; the top, middle and bottom of the adjacent side walls of the first grid-connected cabinet, the capacitor cabinet and the second grid-connected cabinet are provided with heat dissipation ventilation holes, a first heat dissipation fan for blowing hot air passing through the first grid-connected cabinet to the capacitor cabinet is provided in the middle of the first grid-connected cabinet away from the capacitor cabinet, a second heat dissipation fan for blowing hot air passing through the second grid-connected cabinet to the capacitor cabinet is provided in the middle of the second grid-connected cabinet away from the capacitor cabinet, a heat exchanger and a third heat dissipation fan are respectively provided on the side walls of the top of the capacitor cabinet adjacent to the first grid-connected cabinet and the second grid-connected cabinet, and a heat exchanger and a fourth heat dissipation fan are respectively provided on the side walls of the bottom of the capacitor cabinet adjacent to the first grid-connected cabinet and the second grid-connected cabinet.

[0013] Preferably, a fifth cooling fan and a heat exchanger are provided between the first PFC inductor and the first grid-side module, and a sixth cooling fan and a heat exchanger are provided between the second PFC inductor and the second grid-side module.

[0014] After adopting the above converter, the converter includes several functional components and a first power cabinet, a coupled inductor cabinet, a second power cabinet, a first grid-connected cabinet, a capacitor cabinet, and a second grid-connected cabinet arranged from left to right in sequence; the several functional components include: h PFC inductors, n grid-side modules, m machine-side modules, a chopper resistor module, q coupled inductors, a first main circuit breaker module, a second main circuit breaker module, a first grid-connected contactor module, a second grid-connected contactor module, and k groups of filter capacitor components. The several functional components are arranged in the first power cabinet, the coupled inductor cabinet, the second power cabinet, the first grid-connected cabinet, the capacitor cabinet, the second grid-connected cabinet, and other power units according to their functions; the converter adopts modularization to configure and assemble the power cabinet, the grid-connected cabinet, the capacitor cabinet, and the inductor cabinet, so that the whole machine has high power density, short power flow length, and low cost of the conductive bar of the whole machine; the assembly difficulty is reduced, the on-site maintenance is convenient, the power module, the circuit breaker, and the contactor have multiple heat dissipation ducts, which improves the heat dissipation efficiency of the whole machine and reduces the heat dissipation cost of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural diagram of a converter in the prior art;

[0016] Figure 2 The overall structure diagram of the converter of the utility model;

[0017] Figure 3 This is a heat dissipation duct diagram of the converter of the utility model;

[0018] Figure 4 This is a heat dissipation duct diagram of the converter of the utility model from another perspective.

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application 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 application and are not used to limit the present application.

[0021] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Example

[0022] See also Figure 2 , Figure 2 The overall structure diagram of the converter of the utility model;

[0023] The present embodiment discloses a converter, including several functional components and a first power cabinet, a coupled inductor cabinet, a second power cabinet, a first grid-connected cabinet, a capacitor cabinet, and a second grid-connected cabinet arranged from left to right; the several functional components include: h PFC inductors, n grid-side modules, m machine-side modules, a chopper resistor module 6, q coupled inductors, a first main circuit breaker module 11, a second main circuit breaker module 19, a first grid-connected contactor module 13, a second grid-connected contactor module 20, and k groups of filter capacitor components, and the several functional components are arranged in the first power cabinet, the coupled inductor cabinet, the second power cabinet, the first grid-connected cabinet, the capacitor cabinet, and the second grid-connected cabinet according to their functions; wherein n≥2, m≥2, q≥1, and h≥1. Example

[0024] This embodiment is based on the first embodiment. In this embodiment, h=2, h PFC inductors are a first PFC inductor and a second PFC inductor; m=4, 4 machine-side modules are: a first machine-side module 4, a second machine-side module 3, a third machine-side module 22 and a fourth machine-side module 23; n=2, 2 grid-side modules are: a first grid-side module 2 and a second grid-side module 24; q=4, 4 coupling inductors are: a first coupling inductor 7, a second coupling inductor 8, a third coupling inductor 9 and a fourth coupling inductor 10; the first PFC inductor 1 is arranged at the bottom of the first power cabinet, and the first machine-side module 4, the second machine-side module 3 and the first grid-side module 2 are arranged from top to bottom above the first PFC inductor 1; A bus capacitor module 5 is arranged on the back of the machine side module 4, the second machine side module 3 and the first grid side module 2; the first coupling inductor 7, the second coupling inductor 8, the third coupling inductor 9 and the fourth coupling inductor 10 are arranged at the lower part of the coupled inductor cabinet, and the chopper resistor module 6 is arranged at the upper part of the coupled inductor cabinet; the second PFC inductor 25 is arranged at the bottom of the second power cabinet, and the third machine side module 22, the fourth machine side module 23 and the second grid side module 24 are arranged from top to bottom above the second PFC inductor 25; a bus capacitor module is arranged on the back of the third machine side module 22, the fourth machine side module 23 and the second grid side module 24.

[0025] In this embodiment, the AC ends of the first machine side module 4 and the second machine side module 3 are connected to the third coupling inductor 9 and the fourth coupling inductor 10 respectively, and the AC ends of the third machine side module 22 and the fourth machine side module 23 are connected to the first coupling inductor 7 and the second coupling inductor 8 respectively; the first PFC inductor 1 is connected to the first grid side module 2, the second PFC inductor 25 is connected to the second grid side module 24, and the third coupling inductor 9 is connected to the second coupling inductor 8.

[0026] In this embodiment, the first coupled inductor 7 and the second coupled inductor 8 are packaged together to form a whole, and the two inductors are functionally independent of each other.

[0027] The third coupled inductor 9 and the fourth coupled inductor 10 are packaged together to form a whole, and the two inductors are functionally independent of each other. Example

[0028] This embodiment is based on the first embodiment. In this embodiment, the first main circuit breaker module 11 and the first grid-connected contactor module 13 are arranged inside the first grid-connected cabinet from top to bottom, and the second main circuit breaker module 19 and the second grid-connected contactor module 20 are arranged inside the second grid-connected cabinet from top to bottom.

[0029] K groups of filter capacitor components 12 are arranged inside the capacitor cabinet from top to bottom, and the upper and lower groups of filter capacitor components are connected together. Example

[0030] See also Figure 3 , Figure 3 This is a heat dissipation duct diagram of the converter of the utility model;

[0031] This embodiment is based on the third embodiment. In this embodiment, the capacitor cabinet is a heat dissipation circulation air duct for the first grid-connected cabinet and the second grid-connected cabinet; the top, middle and bottom of the adjacent side walls of the first grid-connected cabinet, the capacitor cabinet and the second grid-connected cabinet are provided with heat dissipation ventilation holes, a first heat dissipation fan 21 for blowing hot air passing through the first grid-connected cabinet to the capacitor cabinet is provided in the middle of the first grid-connected cabinet away from the capacitor cabinet, a second heat dissipation fan 16 for blowing hot air passing through the second grid-connected cabinet to the capacitor cabinet is provided in the middle of the second grid-connected cabinet away from the capacitor cabinet, a heat exchanger and a third heat dissipation fan are respectively provided on the side walls of the top of the capacitor cabinet adjacent to the first grid-connected cabinet and the second grid-connected cabinet, and a heat exchanger and a fourth heat dissipation fan are respectively provided on the side walls of the bottom of the capacitor cabinet adjacent to the first grid-connected cabinet and the second grid-connected cabinet. Example

[0032] See also Figure 4 , Figure 4 This is a heat dissipation duct diagram of the converter of the utility model from another perspective;

[0033] This embodiment is based on the second embodiment. In this embodiment,

[0034] A fifth cooling fan and a heat exchanger are disposed between the first PFC inductor 1 and the first grid-side module 2 , and a sixth cooling fan and a heat exchanger are disposed between the second PFC inductor 25 and the second grid-side module 24 .

[0035] The converter adopts modular configuration and assembly of power cabinets, grid-connected cabinets, capacitor cabinets and inductor cabinets. The whole machine has high power density, short power flow length and low cost of conductive bar. The assembly difficulty is reduced and on-site maintenance is convenient. The power modules, circuit breakers and contactors have multiple heat dissipation ducts to improve the heat dissipation efficiency of the whole machine and reduce the heat dissipation cost of the whole machine.

[0036] The preferred embodiments of the present application are described above with reference to the accompanying drawings, but the scope of the present application is not limited thereby. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present application shall be within the scope of the present application.

Claims

1. A converter, characterized in that: It includes several functional components and a first power cabinet, a coupled inductor cabinet, a second power cabinet, a first grid-connected cabinet, a capacitor cabinet, and a second grid-connected cabinet arranged from left to right; the several functional components include: h PFC inductors, n grid-side modules, m machine-side modules, a chopper resistor module, q coupled inductors, a first main circuit breaker module, a second main circuit breaker module, a first grid-connected contactor module, a second grid-connected contactor module, and k groups of filter capacitor components. The several functional components are arranged in the first power cabinet, the coupled inductor cabinet, the second power cabinet, the first grid-connected cabinet, the capacitor cabinet, and the second grid-connected cabinet according to their functions; wherein n≥2, m≥2, q≥1, and h≥1.

2. The converter according to claim 1, characterized in that: h=2, h PFC inductors are: the first PFC inductor and the second PFC inductor; m=4, 4 machine-side modules are: the first machine-side module, the second machine-side module, the third machine-side module and the fourth machine-side module; n=2, 2 grid-side modules are: the first grid-side module and the second grid-side module; q=4, 4 coupling inductors are: the first coupling inductor, the second coupling inductor, the third coupling inductor and the fourth coupling inductor; the first PFC inductor is arranged at the bottom of the first power cabinet, and the first machine-side module, the second machine-side module and the first grid-side module are arranged from top to bottom above the first PFC inductor; the first machine-side A bus capacitor module is arranged on the back of the first machine side module, the second machine side module and the first grid side module; the first coupled inductor, the second coupled inductor, the third coupled inductor and the fourth coupled inductor are arranged at the lower part of the coupled inductor cabinet, and the chopper resistor module is arranged at the upper part of the coupled inductor cabinet; the second PFC inductor is arranged at the bottom of the second power cabinet, and the third machine side module, the fourth machine side module and the second grid side module are arranged from top to bottom above the second PFC inductor; a bus capacitor module is arranged on the back of the third machine side module, the fourth machine side module and the second grid side module.

3. The converter according to claim 2, characterized in that: The AC ends of the first machine side module and the second machine side module are connected to the third coupled inductor and the fourth coupled inductor respectively, and the AC ends of the third machine side module and the fourth machine side module are connected to the first coupled inductor and the second coupled inductor respectively; the first PFC inductor is connected to the first grid side module, the second PFC inductor is connected to the second grid side module, and the third coupled inductor is connected to the second coupled inductor.

4. The converter according to claim 2, characterized in that: The first coupled inductor and the second coupled inductor are packaged together to form a whole, and the two inductors are functionally independent of each other.

5. The converter according to claim 2, characterized in that: The third coupled inductor and the fourth coupled inductor are packaged together to form a whole, and the two inductors are functionally independent of each other.

6. The converter according to claim 1, characterized in that: The first main circuit breaker module and the first grid-connected contactor module are arranged inside the first grid-connected cabinet from top to bottom, and the second main circuit breaker module and the second grid-connected contactor module are arranged inside the second grid-connected cabinet from top to bottom.

7. The converter according to claim 1, characterized in that: The k groups of filter capacitor components are arranged inside the capacitor cabinet from top to bottom, and the upper and lower groups of filter capacitor components are connected together.

8. The converter according to claim 7, characterized in that: The capacitor cabinet is a heat dissipation circulation air duct for the first grid-connected cabinet and the second grid-connected cabinet; the top, middle and bottom of the adjacent side walls of the first grid-connected cabinet, the capacitor cabinet and the second grid-connected cabinet are provided with heat dissipation ventilation holes; a first heat dissipation fan for blowing hot air passing through the first grid-connected cabinet to the capacitor cabinet is provided in the middle of the first grid-connected cabinet away from the capacitor cabinet, and a second heat dissipation fan for blowing hot air passing through the second grid-connected cabinet to the capacitor cabinet is provided in the middle of the second grid-connected cabinet away from the capacitor cabinet. A heat exchanger and a third heat dissipation fan are respectively provided on the side walls of the top of the capacitor cabinet adjacent to the first grid-connected cabinet and the second grid-connected cabinet, and a heat exchanger and a fourth heat dissipation fan are respectively provided on the side walls of the bottom of the capacitor cabinet adjacent to the first grid-connected cabinet and the second grid-connected cabinet.

9. The converter according to claim 2, characterized in that: A fifth cooling fan and a heat exchanger are provided between the first PFC inductor and the first grid-side module, and a sixth cooling fan and a heat exchanger are provided between the second PFC inductor and the second grid-side module.

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