Electric control cabinet and wind generating set

Abstract

The utility model relates to an electric control cabinet and a wind generating set, the electric control cabinet comprises a cabinet body and an integrated relay control device installed in the cabinet body, the integrated relay control device comprises a circuit board and a relay module, the circuit board comprises a board body and a wire arranged in the board body, the relay module is arranged on the board body, and the circuit board is connected with the circuit board. The relay module comprises an interface assembly and a plurality of relay modules. The plurality of relay modules are distributed on the board body at intervals, the interface assembly is arranged on the same side of each relay module in the first direction, the interface assembly comprises an input interface distributed in the second direction and a plurality of output interfaces, and the input interface is electrically connected with at least one relay module through a wire; and each relay module is electrically connected with one output interface through a wire. According to the electric control cabinet and the wind generating set in the embodiment of the invention, the installation space can be saved and the assembly efficiency can be improved while multi-path signal control is realized.

Description

Technical Field

[0001] This application relates to the technical field of wind power generation, and particularly to an electric control cabinet and a wind turbine generator set. Background Art

[0002] In recent years, wind power generation, as a clean energy source, has achieved rapid development. In order to better meet the requirements of wind power generation, relays in an electric control cabinet are required to perform multi-channel signal control.

[0003] In the existing electric control cabinet, the relay application method is to install and use a single relay to control a single load. Therefore, multiple relays need to be installed separately in the same electric control cabinet to achieve multi-channel signal control. The above installation method will occupy a large space, and the cable wiring is complex and costly. Therefore, there is an urgent need for a new electric control cabinet and a wind turbine generator set. Summary of the Utility Model

[0004] This application provides an electric control cabinet and a wind turbine generator set, which can save installation space and improve assembly efficiency while achieving multi-channel signal control.

[0005] On the one hand, according to an embodiment of the present application, an electric control cabinet is proposed, including a cabinet body and an integrated relay control device installed in the cabinet body. The integrated relay control device includes: a circuit board, including a board body and traces built in the board body; a relay module group, arranged on the board body, the relay module group includes an interface assembly and a plurality of relay modules; the plurality of relay modules are spaced apart on the board body, the interface assembly is arranged on the same side of each relay module in a first direction, the interface assembly includes an input interface and a plurality of output interfaces distributed in a second direction, the input interface is electrically connected to at least one relay module through a trace, and each relay module is electrically connected to one of the output interfaces through a trace, and the second direction intersects the first direction.

[0006] According to one aspect of the embodiment of the present application, each relay module in the relay module group is connected to the same input interface, and each output interface is located on the same side of the input interface in the second direction.

[0007] According to one aspect of the embodiment of the present application, the plurality of relay modules are arranged in the second direction and are arranged in one-to-one correspondence with the output interfaces.

[0008] According to one aspect of the embodiment of the present application, the relay module group further includes a grounding part, and the plurality of relay modules are grounded through the grounding part. In the second direction, the minimum distance between the grounding part and the input interface is less than the minimum distance between the grounding part and any output interface.

[0009] According to one aspect of an embodiment of the present application, the input interface has a first plug interface, the output interface has a second plug interface, and the first plug interface and the second plug interface are both oriented toward a side of the interface assembly away from the relay module in a first direction.

[0010] According to one aspect of an embodiment of the present application, the electric control cabinet also includes a connecting shell installed in the cabinet body, the connecting shell has a accommodating cavity opening along a first direction, the integrated relay control device is arranged in the accommodating cavity, and the connecting shell exposes the interface assembly through the opening.

[0011] According to one aspect of an embodiment of the present application, openings are provided on both sides of the connecting shell along the first direction; the number of relay modules is more than two, and the interface assemblies of each relay module are respectively located on the two side edges of the circuit board along the first direction and are arranged corresponding to the openings.

[0012] According to one aspect of an embodiment of the present application, the number of integrated relay control devices is more than two; the number of connecting shells is more than two, and the integrated relay control devices are respectively arranged in the accommodating cavity of each connecting shell, and / or a partition is provided on the connecting shell, and the partition divides the accommodating cavity into multiple sub-accommodating cavities, and the integrated relay control device is correspondingly arranged in each sub-accommodating cavity.

[0013] According to one aspect of an embodiment of the present application, the electric control cabinet further includes a guide rail disposed in the cabinet body, and the connecting shell is slidably connected to the guide rail along a third direction, and the third direction intersects with the first direction and the second direction.

[0014] On the other hand, according to an embodiment of the present application, a wind turbine generator set is proposed, including a power supply, a yaw motor and an electric control cabinet. The electric control cabinet is the electric control cabinet of the above embodiment. The power supply is connected to the input interface of the integrated relay control device, and the yaw motor is connected to the output interface of the integrated relay control device.

[0015] The electric control cabinet provided in the embodiment of the present application integrates multiple relay modules, input interfaces and multiple output interfaces on the same circuit board to form an integrated relay control device to be installed in the cabinet. Multiple relay modules are respectively connected to the input interface and the output interface to form a control loop, so that the occupied volume can be reduced and the installation space can be saved on the basis of realizing the control of multiple signals. In addition, in the integrated relay control device, by adjusting the position of the interface assembly, the input interface and multiple output interfaces are set on the same side of each relay module in the first direction, and are distributed at intervals along the second direction. After the integrated relay control device is installed in the cabinet, it can be plugged in and routed from the same side of the cabinet, saving installation time, simplifying the wiring path, and improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0017] Figure 1 It is a schematic structural diagram of an integrated relay control device according to an embodiment of the present application;

[0018] Figure 2 It is a front view of an integrated relay control device according to an embodiment of the present application;

[0019] Figure 3 It is a circuit diagram of an integrated relay control device provided by an embodiment of the present application;

[0020] Figure 4 It is a partial schematic diagram of an electric control cabinet according to an embodiment of the present application.

[0021] In the drawings:

[0022] 1 - Circuit board; 11 - Mounting holes;

[0023] 2 - Interface assembly; 21 - Input interface; 211 - Independent input terminals; 211a - First independent input terminal; 211b - Second independent input terminal; 211c - Third independent input terminal; 211d - Fourth independent input terminal; 212 - Common input terminal; 22 - Output interface; 22a - First output interface; 22b - Second output interface; 22c - Third output interface; 22d - Fourth output interface;

[0024] 3 - Relay module; 31 - Power relay; 32 - Current limiting resistor; 33 - Indicator light; 34 - Switch diode; 3a - First relay module; 3b - Second relay module; 3c - Third relay module; 3d - Fourth relay module;

[0025] 4 - Grounding part; 5 - Connecting shell; 51 - Opening; 6 - Guide rail;

[0026] X - First direction; Z - Second direction.

[0027] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale. Detailed implementation manners

[0028] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application. In the drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessarily obscuring the present application; and, for clarity, the dimensions of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0029] The orientation terms used in the following description are all the directions shown in the drawings, and do not limit the electrical control cabinet and the wind turbine generator set of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0030] To better understand the technical solution of the present application, the following will Figures 1 to 4 describe in detail the electrical control cabinet and the wind turbine generator set in the embodiments of the present application.

[0031] In the electrical control cabinet of a wind turbine generator set, a relay in the electrical control cabinet is required to perform multi-channel signal control. For example, when applied in a yaw system, there are multiple yaw motors distributed in the nacelle of the wind turbine generator set. The on / off of the power supply of each yaw motor needs to be controlled by a contactor driven by a relay module. Therefore, multiple relay modules need to be provided in the electrical control cabinet to achieve multi-channel signal control.

[0032] In the existing electrical control cabinet, multiple relay modules are separately installed and set, and each relay module performs a single-channel load. The above installation method occupies a large space, has complex cable wiring, and is costly. Therefore, in order to overcome the above defects, the embodiments of the present application also provide a new type of electrical control cabinet, which can be used for the wind turbine generator sets in the above embodiments, especially as a component of the yaw system and connected to multiple yaw motors. Of course, it can also be produced or sold as an independent component.

[0033] Please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 respectively show the structural schematic diagram and the front view of an integrated relay control device according to an embodiment of the present application.

[0034] An embodiment of the present application provides an electric control cabinet, which includes a cabinet body and an integrated relay control device installed in the cabinet body. The integrated relay control device includes a circuit board 1 and a relay module group. The circuit board 1 includes a board body and traces built in the board body. The relay module group is arranged on the board body. The relay module group includes an interface assembly 2 and a plurality of relay modules 3. The plurality of relay modules 3 are spaced apart on the board body. The interface assembly 2 is arranged on the same side of each relay module 3 in the first direction X. The interface assembly 2 includes an input interface 21 and a plurality of output interfaces 22 distributed along the second direction Z. The input interface 21 is electrically connected to at least one relay module 3 through the traces. Each relay module 3 is electrically connected to one of the output interfaces 22 through the traces. The second direction Z intersects with the first direction X.

[0035] In the electric control cabinet provided by the embodiment of the present application, a plurality of relay modules 3, an input interface 21, and a plurality of output interfaces 22 are integrated on the same circuit board 1 to form an integrated relay control device for installation in the cabinet body. The plurality of relay modules 3 are respectively connected to the input interface 21 and the output interfaces 22 to form a control loop, so that on the basis of realizing the control of multiple signals, the occupied volume can be reduced and the installation space can be saved. Moreover, in the integrated relay control device, by adjusting the position of the interface assembly 2, the input interface 21 and the plurality of output interfaces 22 are arranged on the same side of each relay module 3 in the first direction X and are spaced apart along the second direction Z, so that after the integrated relay control device is installed in the cabinet body, the plugging and wiring can be carried out from the same side of the cabinet body, saving the installation man-hours, simplifying the wiring path, and improving the assembly efficiency.

[0036] It can be understood that the electric control cabinet can be applied to the yaw system of a wind turbine generator. As a yaw control cabinet, the electric control cabinet can also be used in other components of the wind turbine generator to realize the control of multiple signals through the integrated relay control device. For the convenience of description, the following will be described by taking the application in the yaw system as an example.

[0037] Optionally, in the integrated relay control device, mounting holes 11 may be provided on the circuit board 1, and the circuit board 1 may be connected to the fixing parts on the cabinet body through the mounting holes 11, so as to install the integrated relay control device on the cabinet body.

[0038] Optionally, on the same integrated relay control device, the specific numbers of the relay modules 3 and the corresponding interface assemblies 2 can be set according to the usage requirements of the wind turbine generator. In the present application, four relay modules 3 are taken as an example, but the number of relay modules 3 is not limited to four, and can be less than four, such as two or three, or can also be more than four.

[0039] In some optional embodiments, the relay module 3 is soldered to the board body. Since a wind turbine may operate in some special environments, for example, an offshore wind turbine operates in an environment with high salt mist and highly corrosive gases. Therefore, compared with the connection method of plugging the relay module 3 into the socket of the board body, by soldering the relay module 3 to the board body, it is possible to avoid the situation of foreign objects and corrosive gases entering between the relay pins and the socket, so as to reduce the impact on the electrical performance of the integrated relay control device and improve the reliability of the integrated relay control device.

[0040] In some optional embodiments, the relay module 3 includes a power relay 31, a current-limiting resistor 32 and an indicator light 33 connected in parallel with the power relay 31. The current-limiting resistor 32 and the indicator light 33 can be used in cooperation to provide an indication function for the corresponding power relay 31.

[0041] Optionally, the power relay 31 includes a relay body and a relay housing covering the relay body. The relay housing is provided with micro holes to reduce the intrusion of high salt mist and highly corrosive gases in the external environment while meeting the heat dissipation requirements of the relay body, thereby improving the reliability of the relay body. In addition, the yoke inside the relay body can also be surface-treated so that the power relay 31 can be more resistant to the erosion of the operating environment of the wind turbine and improve the reliability of the integrated relay control device.

[0042] Optionally, the relay module 3 further includes a switching diode 34 and a varistor connected in parallel with the power relay 31. The switching diode 34 is used to provide a discharge circuit for the power relay 31, and the varistor is used to protect the coil of the power relay 31 from being damaged by transient high voltage. Thus, a protection circuit for the power relay 31 can be formed through the switching diode 34 and the varistor, improving the reliability of the relay module 3.

[0043] Among them, between each relay module 3 and the interface assembly 2, and between the components of the relay module 3, they are connected by traces to form a control circuit. Optionally, the traces can be wires prefabricated on the board body, or the traces can be conductive coatings. By prefabricating the traces on the board body, while ensuring the reliability of each component, it is more convenient to optimize the layout of the relay module 3 and the interface assembly 2 on the circuit board 1.

[0044] It can be understood that the interface assembly 2 includes an input interface 21 and an output interface 22. The input interface 21 is connected in series to the power supply and the coil circuit of the power relay 31 and is used to supply power to the power relay 31. The output interface 22 is connected to the yaw motor and is used to provide a lead-out wiring function for the contacts of the power relay 31.

[0045] Please refer to Figures 1 to 3 , Figure 3The circuit diagram of the integrated relay control device provided by some embodiments of the present application is shown. In some optional embodiments, each relay module 3 in the relay module group is connected to the same input interface 21, and each output interface 22 is located on the same side of the input interface 21 in the second direction Z.

[0046] Taking the number of relay modules 3 as four as an example, the four relay modules 3 are respectively defined as the first relay module 3a, the second relay module 3b, the third relay module 3c, and the fourth relay module 3d.

[0047] The input interface 21 includes four independent input terminals 211 and a common input terminal 212. The four independent input terminals 211 correspond one by one to the A1 coil contacts of each power relay 31. The four independent input terminals 211 are respectively defined as the first independent input terminal 211a, the second independent input terminal 211b, the third independent input terminal 211c, and the fourth independent input terminal 211d. The first independent input terminal 211a is electrically connected to the A1 coil contact of the power relay 31 in the first relay module 3a, the second independent input terminal 211b is electrically connected to the A1 coil contact of the power relay 31 in the second relay module 3b, the third independent input terminal 211c is electrically connected to the coil contact of the power relay 31 in the third relay module 3c, and the fourth independent input terminal 211d is electrically connected to the coil contact of the power relay 31 in the fourth relay module 3d. The common input terminal 212 is electrically connected to the A2 coil contacts of the power relays 31 in the first relay module 3a, the second relay module 3b, the third relay module 3c, and the fourth relay module 3d through traces, so that the negative poles of multiple relay modules 3 can be led out through the same input interface 21, reducing the number of interfaces and saving the use of cables.

[0048] The number of output interfaces 22 is four and corresponds one by one to the relay modules 3. The four output interfaces 22 are respectively defined as the first output interface 22a, the second output interface 22b, the third output interface 22c, and the fourth output interface 22d. Then, the first output interface 22a is electrically connected to the contact of the power relay 31 in the first relay module 3a, the second output interface 22b is electrically connected to the contact of the power relay 31 in the second relay module 3b, the third output interface 22c is electrically connected to the contact of the power relay 31 in the third relay module 3c, and the fourth output interface 22d is electrically connected to the contact of the power relay 31 in the fourth relay module 3d. Each output interface 22 includes multiple contact terminals, and the multiple contact terminals include normally open contacts NO, normally closed contacts NC, and common contacts COM.

[0049] When the control module of the electric control cabinet receives a real-time yaw control instruction, the power supply supplies power to the corresponding relay module 3 through the input interface 21. The coil of the power relay 31 is energized, closing the normally open contact NO and opening the normally closed contact NC to connect the control loop, enabling the yaw motor of the wind turbine generator to start and realizing the yaw of the wind turbine generator. When not connected, the coil of the power relay 31 is de-energized, the normally open contact NO is opened, and the normally closed contact NC is closed, and the yaw motor of the wind turbine generator stops working.

[0050] That the output interfaces 22 are located on the same side of the input interface 21 in the second direction Z means that multiple output interfaces 22 are all located above the input interface 21 along the second direction Z, or multiple output interfaces 22 are all located below the input interface 21 along the second direction Z.

[0051] Since there is a difference between the input voltage and the output voltage of the relay, the input voltage is weak electricity and the output voltage is strong electricity. Therefore, by arranging the output interfaces 22 on the same side of the input interface 21 along the second direction Z, the strong and weak electricity can be arranged separately, avoiding signal interference in the wiring on the circuit board 1 and improving the reliability of the integrated relay control device.

[0052] Optionally, when the board body of the circuit board 1 is set to a rectangular structure, the first direction X can be set as the width direction of the board body, and the second direction Z can be set as the length direction of the board body to facilitate the layout of the components of the relay module 3 and the interface assembly 2 on the board body.

[0053] Optionally, the terminals of the input interface 21 and / or the output interface 22 can be set as spring-type terminal blocks. The spring-type terminal block includes a housing, an operation hole and a wire nose access hole provided on the housing, and a metal spring piece inside the housing. After inserting the external cable into the wire nose access hole, the metal spring piece inside the wire nose access hole will reversely lock the metal groove on the external cable to realize the locking of the external cable. And it is necessary to insert a tool into the operation hole to push the metal spring piece before the external cable can be withdrawn from the operation hole. The above structure is simple and reliable, can prevent the external cable from automatically disconnecting, and improves the reliability of the connection between the external cable and the interface assembly 2.

[0054] In some optional embodiments, multiple relay modules 3 are arranged along the second direction Z and are arranged in one-to-one correspondence with the output interfaces 22.

[0055] Specifically, along the second direction Z, the first relay module 3a, the second relay module 3b, the third relay module 3c and the fourth relay module 3d are arranged in sequence. Similarly, the first output interface 22a, the second output interface 22b, the third output interface 22c and the fourth output interface 22d are also arranged along the second direction Z in the same order as the relay module 3 to shorten the connection path of the wiring between the output interface 22 and the relay module 3 and standardize the design.

[0056] Optionally, in the input interface 21, the first independent input terminal 211a, the second independent input terminal 211b, the third independent input terminal 211c and the fourth independent input terminal 211d are also arranged along the second direction Z in the same order as the relay module 3 to standardize the design and be evenly distributed.

[0057] See also Figures 1 to 3 In some optional embodiments, the relay module also includes a grounding portion 4, and multiple relay modules 3 are grounded through the grounding portion 4. In the second direction Z, the minimum distance between the grounding portion 4 and the input interface 21 is smaller than the minimum distance between the grounding portion 4 and any output interface 22.

[0058] By setting the grounding part 4, the electromagnetic interference signal can be released into the grounding line of the cabinet and then merged into the earth, and reliable EMC (Electro Magnetic Compatibility) shielding grounding can be achieved without adding additional cables. By setting the grounding part 4 close to the input interface 21, the grounding part 4 can be set in the weak current area of ​​the circuit board 1, thereby increasing the protection effect of the integrated relay control device.

[0059] Optionally, the grounding portion 4 may be configured as a grounding hole.

[0060] In some optional embodiments, the input interface 21 has a first plug interface, and the output interface 22 has a second plug interface. Both the first plug interface and the second plug interface are oriented toward the side of the interface assembly 2 away from the relay module 3 in the first direction X to standardize the plug-in structure of external cables and maximize the utilization of space inside the cabinet.

[0061] See also Figures 1 to 4 , Figure 4 A partial schematic diagram of an integrated relay control device in an electric control cabinet according to an embodiment of the present application is shown.

[0062] In some alternative embodiments, the electric control cabinet further includes a connection shell 5 installed inside the cabinet. The connection shell 5 has a receiving cavity with an opening 51 along the first direction X. The integrated relay control device is disposed in the receiving cavity. The connection shell 5 exposes the interface assembly 2 through the opening 51 to play a protective role through the connection shell 5, reducing damage to the relay module 3 and the circuit board 1 during the wiring process.

[0063] When both the first plug interface and the second plug interface face the side of the interface assembly 2 that deviates from the relay module 3 in the first direction X, the opening 51 on the connection shell 5 can be set as a strip-shaped opening extending along the second direction Z. The strip-shaped opening is adapted to the first plug interface and the second plug interface, with a simpler and more reliable structure, and it is also more convenient for wiring, saving space and installation man-hours.

[0064] It can be understood that for the integrated relay control device, since the input interfaces 21 of the relay modules 3 are integrally arranged, the number of relay modules 3 in the same relay module group is not easy to be too large. Therefore, in order to increase the number of relay modules 3 integrated in the electric control cabinet, one feasible way is to increase the number of relay module groups on the same integrated relay control device, and another feasible way is to increase the number of integrated relay control devices.

[0065] When increasing the number of relay module groups on the same integrated relay control device, in some alternative embodiments, openings 51 are provided on both sides of the connection shell 5 along the first direction X. The number of relay module groups is more than two, and the interface assemblies 2 of each relay module group are respectively located at the two side edges of the circuit board 1 along the first direction X and are correspondingly arranged with the openings 51.

[0066] By setting the number of relay module groups to be more than two, the connection of multiple relay module groups can be realized using the same circuit board 1, reducing costs and the occupied volume of the integrated relay control device. At the same time, by making the interface assemblies 2 of each relay module group be respectively located at the two side edges of the circuit board 1 along the first direction X and be correspondingly arranged with the openings 51, it can enable external cables to be plugged in from both sides of the connection shell 5 along the first direction X, improving the assembly efficiency.

[0067] Please refer to Figures 1 to 4 , when increasing the number of integrated relay control devices, in some alternative embodiments, the number of integrated relay control devices is more than two, the number of connection shells 5 is more than two, the integrated relay control devices are respectively disposed in the receiving cavities of the connection shells 5, and / or, partitions are provided on the connection shells 5, and the partitions divide the receiving cavity into multiple sub-receiving cavities, and the integrated relay control devices are correspondingly disposed in each sub-receiving cavity.

[0068] By arranging a plurality of integrated relay control devices inside the connection housing 5, modular combination can be achieved, the number of relay modules 3 can be increased, and the on-off control of multiple control signals can be realized.

[0069] In some alternative embodiments, the electric control cabinet further includes a guide rail 6 disposed inside the cabinet body. The connection housing 5 is slidably connected to the guide rail 6 in a third direction, which intersects with the first direction X and the second direction Z, so as to facilitate the adjustment of the position of the integrated relay control device and improve the applicability.

[0070] As an alternative implementation manner, the side of the connection housing 5 along the first direction X away from the opening 51 is connected to the guide rail 6. Thus, when a plurality of integrated relay control devices are arranged, they can be closely installed side by side in a direction intersecting with the guide rail 6 to maximize the utilization of the internal space of the cabinet body.

[0071] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and the components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electric control cabinet, characterized in that, Comprising a cabinet body and an integrated relay control device installed in the cabinet body, the integrated relay control device includes: A circuit board (1), including a board body and traces built into the board body; A relay module group, arranged on the board body, the relay module group includes an interface assembly (2) and a plurality of relay modules (3); The plurality of relay modules (3) are spaced apart on the board body, the interface assembly (2) is arranged on the same side of each relay module (3) in a first direction, the interface assembly (2) includes an input interface (21) and a plurality of output interfaces (22) distributed in a second direction, the input interface (21) is electrically connected to at least one of the relay modules (3) through traces, each relay module (3) is electrically connected to one of the output interfaces (22) through traces, and the second direction intersects with the first direction.

2. The electric control cabinet according to claim 1, characterized in that, Each of the relay modules (3) in the relay module group is connected to the same input interface (21), and each of the output interfaces (22) is located on the same side of the input interface (21) in the second direction.

3. The electric control cabinet according to claim 2, characterized in that, The plurality of relay modules (3) are arranged along the second direction and are arranged in one-to-one correspondence with the output interfaces (22).

4. The electric control cabinet according to claim 2, wherein The relay module group further includes a grounding part (4), and the plurality of relay modules (3) are grounded through the grounding part (4). In the second direction (Z), the minimum distance between the grounding part (4) and the input interface (21) is less than the minimum distance between the grounding part (4) and any one of the output interfaces (22).

5. The electric control cabinet according to claim 1, characterized in that, The input interface (21) has a first plug interface, and the output interface (22) has a second plug interface. Both the first plug interface and the second plug interface face the side of the interface assembly (2) that is away from the relay module (3) in the first direction.

6. The electric control cabinet according to claim 1, characterized in that, The electric control cabinet further includes a connection shell (5) installed in the cabinet body. The connection shell (5) has a receiving cavity that opens in the first direction. The integrated relay control device is arranged in the receiving cavity, and the connection shell (5) exposes the interface assembly (2) through the opening (51).

7. The electric control cabinet according to claim 6, characterized in that, Openings (51) are provided on both sides of the connection shell (5) along the first direction; The number of the relay module groups is two or more. The interface assemblies (2) of each relay module group are respectively located on the two side edges of the circuit board (1) along the first direction and are arranged corresponding to the openings (51).

8. The electric control cabinet according to claim 6, wherein The number of the integrated relay control devices is two or more; The number of the connection shells (5) is two or more. The integrated relay control devices are respectively arranged in the receiving cavities of each connection shell (5), and / or, a partition is provided on the connection shell (5). The partition divides the receiving cavity into a plurality of sub-receiving cavities, and the integrated relay control devices are correspondingly arranged in each sub-receiving cavity.

9. The electric control cabinet according to claim 6, characterized in that, The electric control cabinet further includes a guide rail (6) arranged in the cabinet body. The connection shell (5) is slidably connected to the guide rail (6) along a third direction, and the third direction intersects with the first direction and the second direction.

10. A wind turbine generator, characterized in that, It includes a power supply, a yaw motor and an electric control cabinet. The electric control cabinet is the electric control cabinet according to any one of claims 1 to 9. The power supply is connected to the input interface (21) of the integrated relay control device, and the yaw motor is connected to the output interface (22) of the integrated relay control device.

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