Power unit and power grid simulator

Abstract

The utility model discloses a power unit and a power grid simulator, and the power unit comprises a capacitor module and a power conversion module, the power conversion module is arranged above the capacitor module in a stacked installation manner, and the power conversion module comprises a first power conversion assembly and a second power conversion assembly which are electrically connected with the capacitor module. A first power conversion assembly and a second power conversion assembly are integrated on a power conversion module, the power conversion module is arranged above a capacitor module in a stacked installation mode, and the first power conversion assembly and the second power conversion assembly are both electrically connected with the capacitor module. Therefore, the two power conversion assemblies of the power conversion module share one capacitor module, the structure is more compact, the integration level is higher, and the compactness of the power unit is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, and more particularly to a power unit and a power grid simulator. BACKGROUND

[0002] A power unit is a unit in which electronic devices are combined and assembled according to specific functions for realizing power conversion functions such as rectification and inversion. As a key component in a power electronic system, the compactness of the structure of the power unit has always been a problem that technicians in the field are eager to solve.

[0003] In view of the above, how to improve the compactness of the power unit has become a technical problem that technicians in the field are eager to solve. CONTENT OF THE INVENTION

[0004] Therefore, the present application provides a power unit and a power grid simulator to improve the compactness of the power unit.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions in one aspect:

[0006] A power unit comprises:

[0007] a capacitor module;

[0008] a power conversion module arranged above the capacitor module in a stacked manner and comprising a first power conversion component and a second power conversion component electrically connected to the capacitor module respectively.

[0009] In some embodiments of the present application, the capacitor module comprises a capacitor group, a capacitor bus and a capacitor mounting frame, the capacitor group is arranged in the capacitor mounting frame, the capacitor bus is used to connect the capacitor group in parallel to form a capacitor bank, and the first power conversion component and the second power conversion component are electrically connected to the capacitor bus.

[0010] In some embodiments of the present application, the capacitor mounting frame has a top opening, and a heat dissipation hole is arranged on the side wall of the capacitor mounting frame.

[0011] In some embodiments of the present application, the capacitor mounting frame comprises a capacitor fixing plate, a first baffle and a second baffle, both ends and the top of the capacitor fixing plate are formed with open openings, the first baffle and the second baffle are arranged at the open openings of both ends of the capacitor fixing plate respectively, and the heat dissipation hole is arranged on the first baffle and / or the second baffle.

[0012] In some embodiments of the present application, the power conversion module further comprises a power mounting frame and a heat sink arranged on the power mounting frame, the power mounting frame is arranged above the capacitor module in a stacked mounting manner, the heat sink has a heat absorption side and a heat dissipation side arranged oppositely, the heat absorption side has a first heat absorption area and a second heat absorption area, the first power conversion assembly is arranged in the first heat absorption area, and the second power conversion assembly is arranged in the second heat absorption area, wherein the heat absorption side is a side of the heat sink facing the capacitor module.

[0013] In some embodiments of the present application, the heat dissipation side has a first heat dissipation area and a second heat dissipation area, the first heat dissipation area corresponds to the first heat absorption area, and the second heat dissipation area corresponds to the second heat absorption area, wherein a partition channel is formed between the first heat dissipation area and the second heat dissipation area.

[0014] In some embodiments of the present application, the power mounting frame is provided with an air inlet hole on the side wall, and the air inlet hole is arranged at a position corresponding to the end side of the partition channel.

[0015] In some embodiments of the present application, the first power conversion assembly comprises a rectifier module, a rectifier row, a current sensor, a rectifier adapter plate, a rectifier bus and a rectifier drive plate, the rectifier module is fixed in the first heat absorption area, the current sensor is arranged on the power mounting frame, the rectifier row is connected with the alternating current side terminal of the rectifier module through the current sensor, the rectifier bus is connected with the direct current side terminal of the rectifier module, the rectifier adapter plate is arranged on the rectifier module, and the rectifier drive plate is arranged on the first side of the power mounting frame and electrically connected with the rectifier adapter plate.

[0016] In some embodiments of the present application, the second power conversion assembly comprises an inverter module, an inverter row, an inverter adapter plate, an inverter bus and an inverter drive plate, the inverter module is fixed in the second heat absorption area, the inverter row is connected with the alternating current side terminal of the inverter module, the inverter bus is connected with the direct current side terminal of the inverter module, the inverter adapter plate is arranged on the inverter module, and the inverter drive plate is arranged on the second side of the power mounting frame and electrically connected with the inverter adapter plate.

[0017] In some embodiments of the present application, a control module is further included, the control module is arranged above the power conversion module in a stacked mounting manner, and the control module comprises a control mounting frame and a control assembly arranged in the control mounting frame.

[0018] Among them, the control assembly comprises at least one of the following four kinds: control board, power board, crowbar resistance and crowbar control assembly.

[0019] In some embodiments of the present application, the control assembly comprises a control panel, a power panel, a crowbar resistance and a crowbar control assembly, wherein the control panel and the power panel are arranged left and right on the front side of the control mounting frame, and a detachable operation and maintenance cover plate is further arranged on the front side panel of the control mounting frame, and the crowbar resistance and the crowbar control assembly are arranged left and right on the rear side in the control mounting frame.

[0020] In some embodiments of the present application, a control assembly is further included, which is integrated in the power conversion module.

[0021] In order to improve the compactness of the power unit, the power unit provided by the present application comprises a capacitor module and a power conversion module, wherein the power conversion module is arranged above the capacitor module in a stacked mounting manner, and the power conversion module comprises a first power conversion assembly and a second power conversion assembly which are electrically connected to the capacitor module respectively.

[0022] The power unit integrates the first power conversion assembly and the second power conversion assembly on one power conversion module, arranges the power conversion module above the capacitor module in a stacked mounting manner, and electrically connects the first power conversion assembly and the second power conversion assembly to the capacitor module, so that the two power conversion assemblies of the power conversion module share one capacitor module, the structure is more compact, the integration degree is higher, and the compactness of the power unit is greatly improved. In addition, since the weight of the capacitor module is heavier than that of the power conversion module, arranging the capacitor module below the power conversion module is beneficial to reduce the center of gravity, thereby helping to improve the stability of the power unit.

[0023] Another aspect of the present application provides a power grid simulator comprising a power unit, which is the power unit described in any of the above solutions. Since the power unit has the above technical effects, the power grid simulator with the power unit should also have corresponding technical effects, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0025] Figure 1 The assembly structure schematic diagram of the power unit provided by the present application is shown in the following figure;

[0026] Figure 2A structural schematic diagram of a capacitor module provided for an embodiment of the present application;

[0027] Figure 3 A structural schematic diagram of a power conversion module provided for an embodiment of the present application;

[0028] Figure 4 A structural schematic diagram of a power conversion module provided for an embodiment of the present application installed to a capacitor module;

[0029] Figure 5 A structural schematic diagram of a control module provided for an embodiment of the present application.

[0030] Wherein, Figures 1-5 In:

[0031] 1 - capacitor module;

[0032] 11 - capacitor group;

[0033] 12 - capacitor bus;

[0034] 13 - capacitor mounting frame;

[0035] 131 - capacitor fixing plate;

[0036] 132 - first baffle;

[0037] 133 - second baffle;

[0038] 2 - power conversion module;

[0039] 21 - first power conversion assembly;

[0040] 211 - rectifier row;

[0041] 212 - current sensor;

[0042] 213 - rectifier module;

[0043] 214 - rectifier adapter plate;

[0044] 215 - rectifier bus;

[0045] 216 - rectifier drive plate;

[0046] 22 - first power conversion assembly;

[0047] 221 - inverter row;

[0048] 223 - inverter module;

[0049] 224 - inverter adapter plate;

[0050] 225 - inverter bus;

[0051] 226 - inverter drive plate;

[0052] 23 - heat sink;

[0053] 231 - heat absorption side;

[0054] 2311 - first heat absorption area;

[0055] 2312 - second heat absorption area;

[0056] 232 - heat dissipation side;

[0057] 2321 - first heat dissipation area;

[0058] 2322 - second heat dissipation area;

[0059] 2323 - partition passage;

[0060] 24 - power installation frame;

[0061] 241 - first side;

[0062] 242 - second side;

[0063] 25 - air inlet hole;

[0064] 3 - control module;

[0065] 31 - control board;

[0066] 32 - power supply board;

[0067] 33 - control installation frame;

[0068] 34 - crowbar resistance;

[0069] 35 - crowbar control assembly

[0070] 36 - operation and maintenance cover plate;

[0071] 4 - input copper bar;

[0072] 5 - input fuse;

[0073] 6 - sealing plate. DETAILED DESCRIPTION

[0074] The core of the present application is to provide a power unit and a power grid simulator to improve the compactness of the power unit.

[0075] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0076] Reference Figures 1-5 The power unit according to the embodiment of the present application comprises a capacitor module 1 and a power conversion module 2. The power conversion module 2 is arranged above the capacitor module 1 in a stacked manner, that is, the capacitor module 1 and the power conversion module 2 are arranged in a stacked manner from bottom to top. Specifically, the power conversion module 2 can comprise a first power conversion component 21 and a second power conversion component 22, which are electrically connected to the capacitor module 1. Here, the first power conversion component 21 and the second power conversion component 22 refer to two identical power conversion components or two different power conversion components, for example, one is a rectifier and the other is an inverter.

[0077] The power unit integrates the first power conversion component 21 and the second power conversion component 22 on the power conversion module 2, which is arranged above the capacitor module 1 in a stacked manner, and the first power conversion component 21 and the second power conversion component 22 are electrically connected to the capacitor module 1. Thus, the two power conversion components of the power conversion module 2 share one capacitor module 1, which makes the structure more compact and the integration higher, greatly improving the compactness of the power unit. In addition, since the capacitor module 1 is heavier than the power conversion module, arranging the capacitor module 1 below the power conversion module 2 helps to lower the center of gravity, thereby improving the stability of the power unit.

[0078] It is worth mentioning that in the power unit, the capacitor module 1 and the power conversion module 2 play important roles. They work together to ensure that the power unit can operate stably and efficiently and meet various power conversion and control requirements. The following is a detailed description of their roles: The main functions of the capacitor module 1 include storing charge, smoothing output voltage, improving circuit efficiency, and preventing electromagnetic interference.

[0079] Specifically, storing charge: The capacitor module 1 can store charge and release it when needed. When there is charge between the two conductor plates in the capacitor, an electric field is formed, resulting in a potential difference and storing the charge in the capacitor. In this way, when the circuit needs charge, the capacitor module 1 can supply power to the circuit by releasing the stored charge. Smoothing output voltage: The capacitor module 1 can smooth the voltage waveform of the direct current power supply or the inverter output, reducing the ripple in the output waveform, thereby improving the stability and safety of the circuit. It can convert the varying current in the circuit into a smooth output current, thereby improving the quality of the power supply. Improving circuit efficiency: The capacitor module 1 can absorb current transients, thereby reducing circuit losses and improving circuit efficiency. Preventing electromagnetic interference: The capacitor module 1 can filter and isolate interference signals to prevent the circuit from being affected by electromagnetic interference and ensure the normal operation of the circuit.

[0080] The main functions of the power conversion module 2 include electric energy conversion, output voltage and frequency adjustment, stable power supply provision, and high-efficiency control implementation, etc. Specifically, electric energy conversion: the power conversion module 2 is the core part of the power unit that realizes electric energy conversion. It can convert the input direct current (DC) into alternating current (AC) and output to the load end. This conversion function enables the power unit to be widely used in various occasions requiring electric energy conversion. Output voltage and frequency adjustment: the power conversion module 2 can adjust the amplitude and frequency of the output voltage according to the demand. This adjustment function is particularly important in the fields of motor drive and inverter, because the running performance and efficiency of the motor are often closely related to the voltage and frequency. Stable power supply provision: through precise electric energy conversion and adjustment functions, the power conversion module 2 can provide stable and reliable power supply for the load. This is of great significance to ensure the normal operation of the equipment and prolong the service life. High-efficiency control implementation: in some advanced power electronic systems, the power conversion module 2 also has high-efficiency control functions. It can adjust the output voltage and current in real time according to the input signal and load demand, to realize more accurate and efficient electric energy conversion and control.

[0081] In some specific embodiments, referring to Figure 1 In combination with Figure 2 As shown, the capacitor module 1 can specifically include a capacitor group 11, a capacitor bus 12, and a capacitor mounting frame 13, wherein the capacitor group 11 is arranged in the capacitor mounting frame 13. The capacitor group 11, as the name implies, is a collection or group composed of multiple capacitors. In electronic devices and circuits, a capacitor is an element that can store electric charge and energy, and a capacitor group refers to the situation where multiple capacitors are combined for use to achieve specific functional or performance requirements. The capacitor bus 12 is used to connect the capacitor group 11 in parallel to form a capacitor bank, and the first power conversion component 21 and the second power conversion component 22 are both electrically connected to the capacitor bus 12.

[0082] In some specific embodiments, referring to Figure 2 As shown, the capacitor mounting frame 13 can specifically have a top opening, and the side wall of the capacitor mounting frame 13 is provided with heat dissipation holes. For example, the capacitor mounting frame 13 can be constructed as a box-shaped structure with an open top, and the side wall of the box-shaped structure is provided with heat dissipation holes. By designing such a top-open structure, the installation and arrangement of the capacitor group 11 are more convenient, the integration is higher, and the protection is better. In addition, by designing heat dissipation holes on the side wall, the heat dissipation performance of the capacitor group 11 can be guaranteed.

[0083] It should be noted that, referring to Figure 2As shown, the top open box structure formed by the capacitor mounting frame 13 can be a one-piece structure or can be designed as a split structure. For example, the capacitor mounting frame 13 can include a capacitor fixing plate 131, a first baffle 132, and a second baffle 133. The capacitor fixing plate 131 has open ends and an open top. The first baffle 132 and the second baffle 133 are arranged at the open ends of the capacitor fixing plate 131, i.e., the capacitor mounting frame 13 can be assembled by the capacitor fixing plate 131, the first baffle 132, and the second baffle 133. The capacitor fixing plate 131 can be designed as a U-shaped structure, and the first baffle 132 and the second baffle 133 are arranged at the open ends of the U-shaped structure. For example, the capacitor fixing plate 131 can be designed as a box structure, and the box structure has an open top and open ends. The heat dissipation holes can be arranged on the first baffle 132, the second baffle 133, or both the first baffle 132 and the second baffle 133. In addition, the heat dissipation holes can be arranged on the capacitor fixing plate 131. In actual application, the heat dissipation holes can be arranged according to actual needs, and no more specific limitations are given herein.

[0084] In some specific embodiments, referring to Figure 1 In combination Figure 3 and Figure 4 As shown, the power conversion module 2 can further include a power mounting frame 24 and a heat sink 23 arranged on the power mounting frame 24. The power mounting frame 24 is arranged above the capacitor module 1 in a stacked mounting manner, i.e., the capacitor module 1 and the power mounting frame 24 are arranged in a stacked manner from bottom to top. Specifically, the power mounting frame 24 can be stacked and fixedly connected with the capacitor mounting frame 13 of the capacitor module 1. The heat sink 23 has a heat absorption side 231 and a heat dissipation side 232 arranged opposite to each other. The heat absorption side 231 has a first heat absorption area 2311 and a second heat absorption area 2312. The first power conversion assembly 21 is arranged in the first heat absorption area 2311, and the second power conversion assembly 22 is arranged in the second heat absorption area 2312. The heat absorption side 231 refers to the side of the heat sink 23 facing the capacitor module 1. Generally, the heat sink 23 has a base plate and heat dissipation fins arranged on the base plate. The heat absorption side 231 refers to the side of the base plate away from the heat dissipation fins, and the heat dissipation side refers to the side of the heat dissipation fins. By designing the power conversion module 2 in the above structure, the arrangement and mounting of the first power conversion assembly 21 and the second power conversion assembly 22 are more convenient, the heat dissipation areas are more clearly divided, the interference between the heat dissipation performance of the first power conversion assembly 21 and the second power conversion assembly 22 is reduced as much as possible, and the mounting and arrangement of the first power conversion assembly 21 and the second power conversion assembly 22 are more convenient.

[0085] In further embodiments, with reference to Figure 3 and Figure 4 The heat dissipation side 232 can have a first heat dissipation area 2321 corresponding to the first heat absorption area 2311 and a second heat dissipation area 2322 corresponding to the second heat absorption area 2312, and a partition channel 2323 is formed between the first heat dissipation area 2321 and the second heat dissipation area 2322. The partition channel 2323 can further reduce the interference between the heat dissipation performance of the first power conversion assembly 21 and the second power conversion assembly 22.

[0086] In further embodiments, with reference to 3 and Figure 4 The side wall of the power mounting frame 24 can be provided with an air inlet hole 25, and the arrangement position of the air inlet hole 25 corresponds to the end side of the partition channel 2323. Specifically, the air inlet hole 25 can be designed on one end side of the partition channel 2323, or the air inlet hole 25 can be designed on both end sides of the partition channel 2323. In actual application, the arrangement can be selected according to actual needs. By adding the air inlet hole 25, the amount of external cold air entering can be increased, which helps to improve the heat dissipation effect. For example, when the heat dissipation air blows from the first heat dissipation area 2321 to the second heat dissipation area 2322, the problem of the decline of the heat dissipation performance of the second power conversion assembly 22 caused by the heat accumulation of the first power conversion assembly 21 can be alleviated by adding the air inlet hole 25.

[0087] In some specific embodiments, with reference to Figure 3As shown, the first power conversion assembly 21 can specifically include a rectifier module 213, a rectifier bus 211, a current sensor 212, a rectifier adapter plate 214, a rectifier busbar 215, and a rectifier drive plate 216. The rectifier module 213 is fixed to the first heat absorption area 2311, which can be fixed to the first heat absorption area 2311 (i.e., the part of the heat absorption area on the base plate of the heat sink 23) by fasteners, for example, but is not limited to. The current sensor 212 is arranged on the power mounting frame 24 and is mainly used for detecting current. The rectifier bus 211 is connected to the AC side terminals of the rectifier module 213 through the current sensor 212. The rectifier busbar 215 is connected to the DC side terminals of the rectifier module 213. The rectifier adapter plate 214 is arranged on the rectifier module 213. The rectifier drive plate 216 is arranged on the first side 241 of the power mounting frame 24 and is electrically connected to the rectifier adapter plate 214, which can be connected by a drive line, for example, but is not limited to. By designing the above structure, the first power conversion assembly 21 has a rectification function. It should be understood that the first power conversion assembly 21 is designed as a power conversion assembly with a rectification function, which is only an example of the embodiments of the present application. In actual application, other functional power conversion assemblies can also be selected according to actual needs, such as power conversion assemblies with inverting function, frequency modulation function, etc.

[0088] In further embodiments, with reference to Figure 1 In combination Figure 3 As shown, the power unit can also include an input copper bar 4 and an input fuse 5 arranged on the front side of the power unit. The input copper bar 4 is electrically connected to the rectifier bus 211 through the input fuse 5, so that the power unit can be connected to the corresponding power grid through the input copper bar 4. The front side of the power conversion module 2 is also provided with an enclosure plate 6, and the enclosure plate 6 is provided with a via hole for the input copper bar 4 to pass through. Such design can improve the protection performance of the power unit.

[0089] In some specific embodiments, with reference to Figure 3As shown, the second power conversion assembly 22 can specifically include an inverter module 223, an inverter row 221, an inverter adapter plate 224, an inverter bus 225, and an inverter drive plate 226. The inverter module 223 is fixed to the second heat absorption area 2312, which can be fixed to the second heat absorption area 2312 (i.e., another part of the heat absorption area on the base plate of the heat sink 23) by fasteners. The inverter row 221 is connected to the AC side terminals of the inverter module 223. The inverter bus 225 is connected to the DC side terminals of the inverter module 223. The inverter adapter plate 224 is arranged on the inverter module 223. The inverter drive plate 226 is arranged on the second side 242 of the power mounting frame 24 and is electrically connected to the inverter adapter plate 224, which can be connected by a drive line or the like. By designing the above structure, the second power conversion assembly 22 has an inverter function. It should be understood that the second power conversion assembly 22 is designed as a power conversion assembly with an inverter function, which is only an example of the embodiment of the present application. In actual application, other functional power conversion assemblies can be selected according to actual needs, such as power conversion assemblies with rectifying function, frequency modulation function, etc.

[0090] It should be noted that, with reference to Figure 4 As shown, when the first power conversion assembly 21 is designed as a power conversion assembly with the above-mentioned rectifying function, and the second power conversion assembly 22 is designed as a power conversion assembly with the inverter function, the power conversion module 2 is inverted and arranged directly above the capacitor module 1, i.e., the heat sink 23 of the power conversion module 2 faces upward, the first power conversion assembly 21 and the second power conversion assembly 22 both face downward, and are arranged in front and back. At this time, the rectifier bus 215 and the inverter bus 225 can be fixed and electrically connected by a screw rod and the capacitor bus 12 to realize energy transmission. This arrangement makes the overall structure of the power unit more regular and compact.

[0091] In some specific embodiments, with reference to Figure 1 and Figure 5 As shown, the power unit can further include a control module 3 arranged above the power conversion module 2 in a stacked mounting manner, i.e., the capacitor module 1, the power conversion module 2, and the control module 3 are stacked and installed from bottom to top. This design makes the structure of the power unit more compact.

[0092] In further embodiments, with reference to Figure 5 As shown, the control module 3 can specifically include a control mounting frame 33 and a control assembly arranged in the control mounting frame 33. The control assembly includes at least one of a control plate 31, a power supply plate 32, a crowbar resistance 34, and a crowbar control assembly 35.

[0093] For example, with reference to Figure 5As shown, the control assembly can specifically include a control board 31, a power board 32, a crowbar resistance 34 and a crowbar control assembly 35, wherein the control board 31 and the power board 32 are arranged left and right on the front side of the control mounting frame 33, and a detachable operation and maintenance cover plate 36 is further arranged on the front side panel 331 of the control mounting frame 33, so that the user can be more convenient for debugging and later fault replacement; the crowbar resistance 34 and the crowbar control assembly 35 are arranged left and right on the rear side in the control mounting frame 33, so that when the power unit fails, the energy discharge protection device can be used.

[0094] In some specific embodiments, the power unit described above can further include a control assembly, which can be specifically selected to be integrated into the power conversion module 2. For example, in some cases, the crowbar resistance 34 and the crowbar control assembly 35 in the control assembly can no longer be needed. The control assembly can be selected to be integrated into the power conversion module 2, at which time only the capacitor assembly 1 and the power conversion module 2 need to be assembled and connected to realize mechanical and electrical connection.

[0095] On the other hand, the embodiments of the present application also provide a power grid simulator, which includes a power unit, and the power unit is the power unit described in any of the above solutions. Since the power unit has the above technical effects, the power grid simulator with the power unit should also have corresponding technical effects, which will not be described here.

[0096] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other.

[0097] As shown in the present application and claims, unless the context clearly indicates otherwise, "one", "a", "an" and / or "the" do not refer to the singular, but also include the plural. Generally, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the statement "comprises a" does not exclude the presence of another identical element in the process, method, product or device comprising the element.

[0098] In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B; "and / or" in this paper only describes the association relationship of the associated object, which means that there can be three kinds of relationships, for example, A and / or B, which can represent: A alone, A and B exist together, and B alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0099] The principles and implementations of the present application are described in the specific examples in this article, and the above examples are only used to help understand the core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A power unit, characterized by The utility model relates to a power conversion module and a capacitor module, and belongs to the field of power conversion technology. The utility model discloses a power conversion module and a capacitor module, and belongs to the field of power conversion technology. The capacitor module (1) comprises a capacitor group (11), a capacitor bus (12) and a capacitor mounting frame (13), the capacitor group (11) is arranged in the capacitor mounting frame (13), the capacitor bus (12) is used for connecting the capacitor group (11) in parallel to form a capacitor cell, and the first power conversion assembly (21) and the second power conversion assembly (22) are electrically connected with the capacitor bus (12).

2. The power unit of claim 1, wherein, The capacitor mounting frame (13) has a top opening, and a heat dissipation hole is arranged on the side wall of the capacitor mounting frame (13).

3. The power unit of claim 2, wherein, The capacitor mounting frame (13) comprises a capacitor fixing plate (131), a first baffle (132) and a second baffle (133), both ends and the top of the capacitor fixing plate (131) are formed with open openings, the first baffle (132) and the second baffle (133) are arranged at the open openings of both ends of the capacitor fixing plate (131) respectively, and the heat dissipation hole is arranged on the first baffle (132) and / or the second baffle (133).

4. The power unit of claim 3, wherein, The power conversion module (2) further comprises a power mounting frame (24) and a heat sink (23) arranged on the power mounting frame (24), the power mounting frame (24) is arranged above the capacitor module (1) in a stacked mounting mode, the heat sink (23) has a heat absorption side (231) and a heat dissipation side (232) arranged oppositely, the heat absorption side (231) has a first heat absorption area (2311) and a second heat absorption area (2312), the first power conversion assembly (21) is arranged in the first heat absorption area (2311), and the second power conversion assembly (22) is arranged in the second heat absorption area (2312).

5. The power unit of claim 1, wherein, The heat dissipation side (232) has a first heat dissipation area (2321) and a second heat dissipation area (2322), the first heat dissipation area (2321) corresponds to the first heat absorption area (2311), the second heat dissipation area (2322) corresponds to the second heat absorption area (2312), and a partition channel (2323) is formed between the first heat dissipation area (2321) and the second heat dissipation area (2322).

6. The power unit of claim 5, wherein, An air inlet and air supplementing hole (25) is arranged on the side wall of the power mounting frame (24), and the arrangement position of the air inlet and air supplementing hole (25) corresponds to the end side of the partition channel (2323).

7. The power unit of claim 6, wherein, ​ 8. The power unit of claim 5, wherein, The first power conversion assembly (21) comprises a rectification module (213), a rectification row (211), a current sensor (212), a rectification adapter board (214), a rectification bus (215) and a rectification drive board (216), the rectification module (213) is fixed to the first heat absorption area (2311), the current sensor (212) is arranged on the power installation frame (24), the rectification row (211) is connected with the alternating current side terminal of the rectification module (213) through the current sensor (212), the rectification bus (215) is connected with the direct current side terminal of the rectification module (213), the rectification adapter board (214) is arranged on the rectification module (213), and the rectification drive board (216) is arranged on the first side (241) of the power installation frame (24) and is electrically connected with the rectification adapter board (214).

9. The power unit of claim 5, wherein, The second power conversion assembly (22) comprises an inversion module (223), an inversion row (221), an inversion adapter board (224), an inversion bus (225) and an inversion drive board (226), the inversion module (223) is fixed to the second heat absorption area (2312), the inversion row (221) is connected with the alternating current side terminal of the inversion module (223), the inversion bus (225) is connected with the direct current side terminal of the inversion module (223), the inversion adapter board (224) is arranged on the inversion module (223), and the inversion drive board (226) is arranged on the second side (242) of the power installation frame (24) and is electrically connected with the inversion adapter board (224).

10. The power unit of any one of claims 1-9, wherein, Further comprising a control module (3), the control module (3) is arranged above the power conversion module (2) in a stacked installation mode, and the control module (3) comprises a control installation frame (33) and a control assembly arranged in the control installation frame (33). The control assembly comprises at least one of a control board (31), a power supply board (32), a crowbar resistance (34) and a crowbar control assembly (35).

11. The power unit of claim 10, wherein, The control assembly comprises a control board (31), a power supply board (32), a crowbar resistance (34) and a crowbar control assembly (35), wherein the control board (31) and the power supply board (32) are arranged left and right on the front side of the control installation frame (33), and a detachable operation and maintenance cover plate (36) is further arranged on the front side panel (331) of the control installation frame (33), and the crowbar resistance (34) and the crowbar control assembly (35) are arranged left and right on the rear side in the control installation frame (33).

12. The power unit of any one of claims 1-9, wherein, Further comprising a control assembly, the control assembly is integrated in the power conversion module (2).

13. A power grid simulator comprising a power unit, characterized in that The power unit is the power unit according to any one of claims 1-12.

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