Surge protection device, electric control cabinet and wind generating set

Abstract

The utility model relates to a surge protection device, an electric control cabinet and a wind generating set, the surge protection device comprises a circuit board and a surge protection module, a wiring is arranged in the circuit board, the surge protection module is arranged on the circuit board, and the surge protection module comprises a grounding part and a plurality of surge protection modules. The plurality of surge protection modules are arranged along a first direction, each surge protection module is connected with the grounding part through a wire, and the surge protection modules are arranged on two sides of the grounding part along the first direction. According to the surge protection device in the embodiment of the invention, the plurality of surge protection modules are integrated on the same circuit board, the surge protection device replaces the plurality of separately installed surge protection modules, and the layout of the surge protection modules and the grounding part is improved, so that the integration of the surge protection modules is realized, and the reliability of the surge protection modules is improved. The maximum distance between the grounding part and each surge protection module is reduced, the grounding loss is reduced, and the system reliability of the surge protection device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of surge protection, and particularly to a surge protection device, an electrical 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. However, during the process of wind power generation, extreme weather phenomena such as lightning often occur. Lightning overvoltage or overcurrent and switching overvoltage will instantaneously cause great harm to the electrical equipment in the wind turbine generator set. Therefore, it is necessary to install a surge protector in the electrical control cabinet to protect the electrical equipment.

[0003] In the existing electrical control cabinets, there are multiple surge protectors with the same voltage level. The surge protectors are installed independently and grounded separately, resulting in a high cost. At the same time, it is not conducive to installation and subsequent operation and maintenance. Therefore, there is an urgent need to provide a new surge protection device. Summary of the Utility Model

[0004] The present application provides a surge protection device, an electrical control cabinet, and a wind turbine generator set, which can achieve the integration of surge protection modules, reduce grounding losses, and improve the reliability of the system.

[0005] On the one hand, according to an embodiment of the present application, a surge protection device is provided, including: a circuit board with internal traces; a surge protection module group disposed on the circuit board. The surge protection module group includes a grounding part and a plurality of surge protection modules. The plurality of surge protection modules are arranged along a first direction. Each surge protection module is respectively connected to the grounding part through a trace. On both sides of the grounding part along the first direction, surge protection modules are provided.

[0006] According to one aspect of the embodiment of the present application, M surge protection modules are provided on one side of the grounding part in the first direction, and N surge protection modules are provided on the other side of the grounding part in the first direction, where M - N = 0 or 1.

[0007] According to one aspect of the embodiment of the present application, the number of surge protection module groups is two or more. The two or more surge protection module groups include a power surge protection module group and a signal surge protection module group; the power surge protection module group includes a plurality of power surge protection modules arranged along the first direction, and power surge protection modules are provided on both sides of the grounding part of the power surge protection module group, and / or, the signal surge protection module group includes a plurality of signal surge protection modules arranged along the first direction, and signal surge protection modules are provided on both sides of the grounding part of the signal surge protection module group.

[0008] According to one aspect of the embodiments of the present application, a power surge protection module includes a power connection terminal, a varistor, and a first discharge tube that are arranged in a second direction and electrically connected to each other; the grounding portion of the power surge protection module is arranged in the second direction on the side of the first discharge tube away from the varistor and is connected to the first discharge tube through a trace, and the second direction intersects with the first direction.

[0009] According to one aspect of the embodiments of the present application, a signal surge protection module includes a first connection terminal, a second discharge tube, a transient suppression diode, and a second connection terminal that are arranged in a second direction and electrically connected to each other; the distance between the grounding portion of the signal surge protection module and the second discharge tube in the second direction is less than or equal to the distance between the second discharge tube and the transient suppression diode, and the grounding portion is connected to the second discharge tube through a trace, and the second direction intersects with the first direction.

[0010] According to one aspect of the embodiments of the present application, the signal surge protection module further includes a fuse resistor, and the fuse resistor is connected in series between the second discharge tube and the transient suppression diode in the second direction; the fuse resistor includes a first connection end, a second connection end, and a fuse body, the fuse body extends in the second direction and its two ends are connected to the circuit board through the first connection end and the second connection end, the orthographic projection of the grounding portion in the first direction on the signal surge protection module overlaps at least partially with the fuse resistor, and the trace is connected to the grounding portion by passing through the gap between the first connection end and the second connection end of the second discharge tube.

[0011] According to one aspect of the embodiments of the present application, at the position of the fuse resistor, the size of the fuse body in the second direction is greater than the size of the trace in the second direction.

[0012] According to one aspect of the embodiments of the present application, the signal surge protection module includes a digital quantity signal surge protection module and an analog quantity signal surge protection module, and the number of the analog quantity signal surge protection modules is two or more and they are located on both sides of the digital quantity signal surge protection module in the first direction.

[0013] On the other hand, according to the embodiments of the present application, an electric control cabinet is proposed, which includes a housing, a controller, and the surge protection device in any of the above embodiments, and the surge protection device is arranged in the housing and connected to the controller.

[0014] In yet another aspect, according to the embodiments of the present application, a wind turbine generator set is proposed, which includes a fan component, a plurality of sensors, and the electric control cabinet in the above embodiments. The sensors are configured to detect the working state of the fan component, and each sensor corresponds to a surge protection module and is connected to the controller through the surge protection module. The fan component includes a nacelle, and the plurality of sensors are arranged on the nacelle and include at least one of a wind direction sensor and a wind speed sensor.

[0015] The surge protection device provided by the embodiment of the present application integrates multiple surge protection modules on the same circuit board. Instead of installing multiple surge protection modules separately, the surge protection device is used to achieve centralized management, which is convenient for installation and later operation and maintenance, and achieves the purpose of cost reduction and efficiency improvement. At the same time, in the surge protection device, multiple surge protection modules are arranged along the first direction and connected to a grounding part. Surge protection modules are arranged on both sides of the grounding part, that is, the grounding part is located between multiple surge protection modules. By improving the layout of the surge protection modules and the grounding part, while realizing the integration of the surge protection modules, the maximum distance between the grounding part and each surge protection module is reduced, the grounding loss is reduced, and the system reliability of the surge protection device is improved. Brief Description of the Drawings

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

[0017] Figure 1 is a schematic structural diagram of a wind turbine generator set according to an embodiment of the present application;

[0018] Figure 2 is a schematic structural diagram of a surge protection device according to an embodiment of the present application;

[0019] Figure 3 is a front view of a surge protection device according to an embodiment of the present application;

[0020] Figure 4 is a circuit diagram of a power surge protection module according to an embodiment of the present application;

[0021] Figure 5 is a circuit diagram of a signal surge protection module according to an embodiment of the present application.

[0022] In the drawings:

[0023] 100 - tower barrel; 200 - nacelle; 300 - generator; 400 - impeller; 410 - hub; 420 - blade;

[0024] 10 - surge protection device;

[0025] 1 - circuit board; 11 - trace; 2 - surge protection module; 21 - grounding part; 22 - surge protection module;

[0026] 2a - power surge protection module; 21a - first grounding part; 22a - power surge protection module; 221a - power terminal; 222a - varistor; 223a - first discharge tube;

[0027] 2b - Signal surge protection module; 21b - Second grounding part; 22b - Signal surge protection module; 221b - First wiring terminal; 222b - Second discharge tube; 223b - Transient suppression diode; 224b - Second wiring terminal; 225b - Fuse resistor;

[0028] X - First direction; Y - Second direction.

[0029] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale. Detailed implementation manners

[0030] 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.

[0031] The orientation terms appearing in the following description are all the directions shown in the drawings, and do not limit the surge protection device, the electric 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 situations.

[0032] For a better understanding of the technical solution of the present application, the following combines the attached Figures 1 to 5 The surge protection device, the electric control cabinet and the wind turbine generator set in the embodiments of the present application are described in detail.

[0033] Please refer to Figure 1 , Figure 1It is a schematic structural diagram of a wind turbine generator set according to an embodiment of the present application. The embodiment of the present application provides a wind turbine generator set, which includes a tower barrel 100, a nacelle 200, an electric control cabinet, a generator 300, an impeller 400 and other multiple fan components. The nacelle 200 is arranged at the top of the tower barrel 100. The electric control cabinet is arranged inside the tower barrel 100 or the nacelle 200. The generator 300 is arranged in the nacelle 200 and can be located inside the nacelle 200 or outside the nacelle 200. The impeller 400 includes a hub 410 and multiple blades 420 connected to the hub 410. The impeller 400 is connected to the rotating shaft of the generator 300 through its hub 410. When the wind acts on the impeller 400, it drives the entire impeller 400 and the rotating shaft of the generator 300 to rotate, so as to convert wind energy into electrical energy.

[0034] The wind turbine generator set is provided with multiple sensors. The sensors are arranged on the nacelle 200 and connected to the electric control cabinet through signal transmission lines. The sensors are, for example, a wind speed sensor, a wind direction sensor, a temperature sensor, etc., to detect the working state of the wind turbine generator set in real time, so that the operation of the wind turbine generator set can be driven accordingly, and the wind power generation efficiency can be improved. Since the sensors are arranged outside the nacelle 200, multiple surge protection modules need to be arranged in the electric control cabinet. Each sensor corresponds to a surge protection module and is connected to the controller through the surge protection module, so as to control the instantaneous overcurrent and voltage suddenly intruding into the wire loop and signal transmission line within the range that the equipment can bear when encountering extreme weather phenomena such as lightning, or introduce the powerful lightning strike current into the ground, ensuring that the electrical equipment in the electric control cabinet can work safely and stably without being damaged due to impact.

[0035] In the electric control cabinet of the existing wind turbine generator set, multiple surge protectors are independently installed and grounded separately, which is inconvenient for operation and installation. At the same time, since the wind turbine generator set is installed in a relatively harsh outdoor environment, multiple surge protectors need to be provided with separate enclosures for protection, resulting in higher installation costs, larger occupied space, and difficulties in later maintenance, disassembly and assembly. In order to overcome the above defects, the embodiment of the present application also provides a new surge protection device 10. The surge protection device 10 can be used in the electric control cabinet and wind turbine generator set of the above embodiments and is used as a component of the wind turbine generator set. Of course, it can also be produced or sold separately as an independent component.

[0036] Please refer to Figure 2 , Figure 2The structural schematic diagram of a surge protection device 10 according to an embodiment of the present application is shown. An embodiment of the present application provides a surge protection device 10, including a circuit board 1 and a surge protection module 2. The circuit board 1 is internally provided with a trace 11. The surge protection module 2 is disposed on the circuit board 1. The surge protection module 2 includes a grounding portion 21 and a plurality of surge protection modules 22. The plurality of surge protection modules 22 are arranged along a first direction X. Each surge protection module 22 is respectively connected to the grounding portion 21 through the trace 11. Along the first direction X, surge protection modules 22 are disposed on both sides of the grounding portion 21.

[0037] In the surge protection device 10 provided by the embodiment of the present application, a plurality of surge protection modules 22 are integrated on the same circuit board 1. By using the surge protection device 10 to replace a plurality of surge protection modules 22 with the same voltage level installed separately, centralized unified management is realized, which is convenient for installation and later operation and maintenance, and the purpose of cost reduction and efficiency improvement is achieved. At the same time, in the surge protection device 10, a plurality of surge protection modules 22 are arranged along the first direction X and connected to a grounding portion 21. Surge protection modules 22 are disposed on both sides of the grounding portion 21, that is, the grounding portion 21 is located between the plurality of surge protection modules 22. By improving the layout of the surge protection module 22 and the grounding portion 21, while realizing the integration of the surge protection module 22, the maximum distance between the grounding portion 21 and each surge protection module 22 is reduced, the grounding loss is reduced, and the system reliability of the surge protection device 10 is improved.

[0038] Optionally, the grounding portion 21 can be set as a grounding terminal or a grounding hole.

[0039] Optionally, the trace 11 can be printed on the board body, and the material of the trace 11 can be set as copper.

[0040] During the current discharge process of the surge protection device 10, by reducing the distance between the grounding portion 21 and each surge protection module 22, the traces 11 between the grounding portion 21 and each surge protection module 22 can be made moderate and not too long, so as to avoid problems such as large impedance of the current discharge path and increased residual voltage level caused by too long traces 11, and more reliably protect the subsequent equipment of the surge protection device 10, and improve the system reliability of the surge protection device 10.

[0041] It can be understood that the surge protection device 10 in the embodiment of the present application can be used in the electrical control cabinet of a wind turbine generator for lightning protection of the wind turbine generator. Of course, the surge protection device 10 can also be applied to other lightning protection places, and the present application does not make specific limitations on this.

[0042] In some optional embodiments, M surge protection modules 22 are disposed on one side of the grounding portion 21 in the first direction X, and N surge protection modules 22 are disposed on the other side of the grounding portion 21 in the first direction X, where M - N = 0 or 1.

[0043] It can be understood that when the number of surge protection modules 22 is an even number, the difference M - N in the number of surge protection modules 22 on both sides of the grounding portion 21 can be made 0, and when the number of surge protection modules 22 is an odd number, the difference M - N in the number of surge protection modules 22 on both sides of the grounding portion 21 can be made 1.

[0044] By reducing the difference in the number of surge protection modules 22 on both sides of the grounding portion 21, the grounding portion 21 can be arranged closer to the middle of the multiple surge protection modules 22 along the first direction X, thereby further shortening the maximum distance between the grounding portion 21 and each surge protection module 22 to reduce the grounding loss, and reducing the distance difference between the grounding portion 21 and each surge protection module 22 to reduce electromagnetic interference and further improve the system reliability of the surge protection device 10.

[0045] It can be understood that the grounding portion 21 can be set to one, and multiple surge protection modules 22 on the circuit board 1 can share the same grounding portion 21, or the number of grounding portions 21 can be set to two or more, and multiple surge protection modules 22 on the circuit board 1 can be divided into multiple surge protection modules 2. Multiple surge protection modules 22 in the same surge protection module 2 share one grounding portion 21 to increase the number of grounding portions 21, reduce the maximum distance between the grounding portion 21 and each surge protection module 22 in the surge protection module 2, and improve the system reliability.

[0046] Please refer to Figure 2 and Figure 3 , Figure 3 which shows a front view of the surge protection device 10 provided by an embodiment of the present application.

[0047] In some optional embodiments, the number of surge protection modules 2 is two or more. The two or more surge protection modules 2 include a power surge protection module 2a and a signal surge protection module 2b. The power surge protection module 2a includes multiple power surge protection modules 22a arranged along the first direction X, and power surge protection modules 22a are provided on both sides of the grounding portion 21 of the power surge protection module 2a, and / or the signal surge protection module 2b includes multiple signal surge protection modules 22b arranged along the first direction X, and signal surge protection modules 22b are provided on both sides of the grounding portion 21 of the signal surge protection module 2b.

[0048] According to the protected object of the surge protection module 22, it can be divided into a power surge protection module 22a and a signal surge protection module 22b. The power surge protection module 22a is connected to the power line to protect the power transmission equipment from damage, and the signal surge protection module 22b is connected to the signal transmission line to suppress the surge voltage and protect the signal transmission equipment from damage.

[0049] When multiple surge protection modules 22 are integrated on the circuit board 1, the power surge protection module 22a and the signal surge protection module 22b can be grouped. For ease of description, the grounding part 21 in the power surge protection module group 2a is defined as the first grounding part 21a, and the grounding part 21 in the signal surge protection module group 2b is defined as the second grounding part 21b. The first grounding part 21a is located between multiple power surge protection modules 22a, and the second grounding part 21b is located between multiple signal surge protection modules 22b, so that the power surge protection module 22a and the signal surge protection module 22b can be grounded separately, improving the reliability of the surge protection device 10.

[0050] It can be understood that according to the numbers of the power surge protection module 22a and the signal surge protection module 22b on the circuit board 1, the numbers of the first grounding part 21a and / or the second grounding part 21b can also be increased to form multiple groups of power surge protection module groups 2a and / or signal surge protection module groups 2b. Among them, the number of the surge protection module groups 2 and the number of the surge protection modules 22 in each surge protection module group 2 can both be adjusted according to actual design requirements, as long as the grounding requirements can be met and the grounding loss can be reduced.

[0051] Please refer to Figure 3 and Figure 4 , Figure 4 which shows the circuit diagram of the power surge protection module group 2a provided by an embodiment of the present application.

[0052] In some optional embodiments, the power surge protection module 22a includes a power connection terminal 221a, a varistor 222a, and a first discharge tube 223a that are arranged along the second direction Y and are electrically connected to each other. The first grounding part 21a is arranged along the second direction Y on the side of the first discharge tube 223a away from the varistor 222a and is connected to the first discharge tube 223a through a trace 11. The second direction Y intersects with the first direction X.

[0053] The working principle of the power surge protection module 22a is mainly to suppress overvoltage through transient voltage suppression devices. Among them, the power connection terminal 221a is connected to a wire connected in parallel at both ends of the power supply. The varistor 222a belongs to a voltage-limiting device. When a high voltage appears at both ends, it changes from a high-resistance state to a low-resistance state, discharges the lightning current and can clamp the voltage at both ends at a certain level. The first discharge tube 223a belongs to a switching device. The first discharge tube 223a is connected to the grounding part 21 and can conduct when a high voltage appears at both ends, providing a path for the lightning current to discharge to the ground.

[0054] Optionally, the first discharge tube 223a can be set as a bipolar gas discharge tube.

[0055] Under normal working conditions, the varistor 222a and the first discharge tube 223a are in the cut-off state, and no current flows inside. When a high voltage is introduced into the power line due to external factors and the voltage exceeds the normal working range, the varistor 222a and the first discharge tube 223a are turned on, the excessive large current is discharged to the ground, and the voltage at both ends of the power supply is kept at a low level, thereby protecting some electrical equipment connected in parallel to the power line at the subsequent stage.

[0056] Optionally, the first direction X is the length direction of the circuit board 1, and the second direction Y is the width direction of the circuit board 1. By arranging the components of the power surge protection module 22a along the second direction Y, the layout of the power surge protection modules 22a can be made more compact, saving space. In addition, since the first grounding portion 21a is connected to the first discharge tube 223a, by arranging the first grounding portion 21a on the side of the first discharge tube 223a away from the varistor 222a along the second direction Y, the distance of the wiring 11 between the first discharge tube 223a and the first grounding portion 21a can be reduced, thereby improving reliability.

[0057] See also Figure 3 and Figure 5 , Figure 5 A circuit diagram of a signal surge protection module 2b provided in an embodiment of the present application is shown.

[0058] In some optional embodiments, the signal surge protection module 22b includes a first terminal 221b, a second discharge tube 222b, a transient suppression diode 223b, and a second terminal 224b arranged and electrically connected to each other along the second direction Y. The distance between the second grounding portion 21b and the discharge tube along the second direction Y is less than or equal to the distance between the second discharge tube 222b and the transient suppression diode 223b, the second grounding portion 21b is connected to the second discharge tube 222b through the wiring 11, and the second direction Y intersects with the first direction X.

[0059] The working principle of the signal surge protection module 22b is mainly to suppress overvoltage through transient voltage suppression devices. Among them, the first terminal 221b and the second terminal 224b are connected in series on the signal transmission line, the first terminal 221b is used to connect to the sensor, and the second terminal 224b is used to connect to the controller in the electric control cabinet. The second discharge tube 222b is connected in parallel with the transient suppression diode 223b. The second discharge tube 222b is a switch-type device that can be turned on under high voltage at both ends to provide a path for lightning current to be discharged to the ground. When both ends of the transient suppression diode 223b are subjected to reverse transient high-energy impact, the high impedance between its two poles becomes low impedance, absorbing surge power, so that the voltage at both ends is clamped at a certain level.

[0060] Optionally, at least one of the first terminal 221b, the second terminal 224b, and the power supply terminal 221a is a spring terminal. The spring terminal 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 an external cable into the wire nose access hole, the metal spring piece inside the wire nose access hole will reversely clamp the metal groove on the external cable to lock the external cable. Moreover, 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 detaching, and improve the reliability of the connection between the external cable and the terminal.

[0061] Optionally, the second discharge tube 222b can be set as a triode gas discharge tube.

[0062] Under normal operating conditions, the second discharge tube 222b and the transient suppression diode 223b are in the cut-off state and no current flows through them. When a high voltage is introduced into the signal line due to external factors and the voltage exceeds the normal operating range, the action voltage of the transient suppression diode 223b is smaller and it acts first to absorb the high-energy pulse and clamp the voltage across its two ends at a lower level. When the voltage applied to the transient suppression diode 223b is greater than the breakdown voltage of the second discharge tube 222b, the second discharge tube 222b conducts and discharges the large current to the ground, thus preventing the transient suppression diode 223b from being damaged by a long-term high-energy impact.

[0063] Optionally, arranging the components of the signal surge protection module 22b along the second direction Y can make the layout between the signal surge protection modules 22b more compact, save space, and make the signal transmission smoother. In addition, since the second grounding part 21b is connected to the second discharge tube 222b, by making the distance between the second grounding part 21b and the discharge tube along the second direction Y less than or equal to the distance between the second discharge tube 222b and the transient suppression diode 223b, the wiring distance between the second discharge tube 222b and the second grounding part 21b can be reduced, improving the reliability.

[0064] Please refer to Figure 3 and Figure 5, in some optional embodiments, the signal surge protection module 22b further includes a fuse resistor 225b, and the fuse resistor 225b is connected in series between the second discharge tube 222b and the transient suppression diode 223b along the second direction Y. When a high voltage surges into the signal line, the second discharge tube 222b will conduct only when the sum of the voltages applied to the transient suppression diode 223b and the fuse resistor 225b is greater than the breakdown voltage of the second discharge tube 222b. Therefore, by selecting a fuse resistor 225b with a suitable resistance value, the second discharge tube 222b can be made to act to discharge the high energy before the transient suppression diode 223b is damaged by continuous high-energy impacts, thereby protecting the transient suppression diode 223b. In addition, the fuse resistor 225b with a built-in temperature fuse can disconnect the circuit when the resistance conducts an abnormally small current and continuously heats up to avoid danger.

[0065] Optionally, the number of the fuse resistors 225b can be set to more than two.

[0066] The fuse resistor 225b includes a first connection end, a second connection end, and a fuse body. The fuse body extends along the second direction Y, and both ends thereof are connected to the circuit board 1 through the first connection end and the second connection end. The second grounding portion 21b is arranged at least partially overlapping with the fuse resistor 225b in the positive projection of the signal surge protection module 22b along the first direction X. The trace 11 is connected from the second discharge tube 222b through the gap between the first connection end and the second connection end to the second grounding portion 21b.

[0067] Since the fuse body of the fuse resistor 225b is connected to the circuit board 1 through the first connection end and the second connection end, a gap will be formed between the first connection end and the second connection end of the circuit board 1 below the fuse. By connecting the trace 11 from the second discharge tube 222b to the second grounding portion 21b through the above gap, the path of the trace 11 can be shortened, and the layout of the trace 11 is more regular and beautiful, improving the reliability.

[0068] Optionally, the trace 11 can extend from the second discharge tube 222b along the second direction Y to the position where the fuse resistor 225b is located, and then is connected to the second grounding portion 21b through the gap between the first connection end and the second connection end along the first direction X. The above connection method is more reliable. At the same time, among the multiple signal surge protection modules 22b located on one side of the second grounding portion 21b, after the traces 11 extend from their respective second discharge tubes 222b to the fuse resistors 225b, they can be connected to each other along the first direction X and then connected to the second grounding portion 21b to improve the reliability of the trace 11.

[0069] In some optional embodiments, at the position where the fuse resistor 225b is located, the size of the fuse body in the second direction Y is greater than the size of the trace 11 in the second direction Y, so as to facilitate the trace 11 to pass through the gap between the first connection end and the second connection end below the fuse resistor 225b and avoid interference.

[0070] It can be understood that, on the basis of not interfering with the fuse resistor 225b, the size of the trace 11 in the second direction Y can be appropriately increased to increase the resistance of the trace 11, so as to be able to withstand a larger current.

[0071] Please refer to Figure 3 and Figure 5 , in some optional embodiments, the signal surge protection module 22b includes a digital signal surge protection module and an analog signal surge protection module. The number of analog signal surge protection modules is more than two and they are located on both sides of the digital signal surge protection module along the first direction X.

[0072] According to the protected object of the signal surge protection module 22b, it may include a digital signal surge protection module and an analog signal surge protection module. The analog signal is a balanced signal and the digital signal is an unbalanced signal. The digital signal surge protection module and the analog signal surge protection module can share the same second grounding part 21b to reduce the number of the second grounding parts 21b and simplify the structure.

[0073] Optionally, taking the signal surge protection module 22b including four analog signal surge protection modules and one digital signal surge protection module as an example, the digital signal surge protection module can be arranged between the analog signal surge protection modules, and the second grounding part 21b is arranged close to the digital signal surge protection module side, so as to further shorten the maximum distance between the second grounding part 21b and each signal surge protection module 22b, and reduce the distance difference between the second grounding part 21b and each signal surge protection module 22b, further improving the system reliability of the surge protection device 10.

[0074] The embodiment of the present application also proposes an electric control cabinet, which includes a housing, a controller, and the surge protection device 10 in any of the above embodiments. The surge protection device 10 is arranged in the housing and connected to the controller.

[0075] Using the surge protection device 10 in the above embodiments can replace the original scattered surge protection modules 22, achieving centralized and unified management, and being more convenient for installation and operation and maintenance. In addition, by welding all the components realizing the surge protection function to the circuit board 1, the respective housings of each surge protection module 22 can be omitted, reducing the overall cost and achieving the purpose of cost reduction and efficiency improvement.

[0076] The wind turbine provided by the embodiment of the present application includes the electrical control cabinet provided by each of the above embodiments, so it has the advantages of convenient installation and operation and maintenance, low cost, small grounding loss, high reliability, etc., and is easy to popularize and apply.

[0077] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and 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 technical features mentioned in each embodiment can be combined in any way. 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. A surge protection device, characterized in that, include: A circuit board (1) having a built-in wiring (11); A surge protection module (2) is arranged on the circuit board (1), the surge protection module (2) comprising a grounding portion (21) and a plurality of surge protection modules (22), the plurality of surge protection modules (22) being arranged along a first direction (X), each of the surge protection modules (22) being connected to the grounding portion (21) via the wiring (11), and the surge protection modules (22) are arranged on both sides of the grounding portion (21) along the first direction (X).

2. The surge protection device according to claim 1, characterized in that The grounding portion (21) is provided with M surge protection modules (22) on one side of the first direction (X), and the grounding portion (21) is provided with N surge protection modules (22) on the other side of the first direction (X), wherein MN=0 or 1.

3. The surge protection device according to claim 1 or 2, characterized in that, The number of the surge protection modules (2) is more than two, and the more than two surge protection modules (2) include a power surge protection module (2a) and a signal surge protection module (2b); The power surge protection module (2a) comprises a plurality of power surge protection modules (22a) arranged along a first direction (X), and the power surge protection modules (22a) are arranged on both sides of a grounding portion (21) of the power surge protection module (2a), and / or the signal surge protection module (2b) comprises a plurality of signal surge protection modules (22b) arranged along a first direction (X), and the signal surge protection modules (22b) are arranged on both sides of a grounding portion (21) of the signal surge protection module (2b).

4. The surge protection device according to claim 3, characterized in that, The power surge protection module (22a) comprises power connection terminals (221a), a varistor (222a) and a first discharge tube (223a) arranged along a second direction (Y) and electrically connected to each other; The grounding portion (21) of the power surge protection module (2a) is arranged on a side of the first discharge tube (223a) away from the varistor (222a) along a second direction (Y) and is connected to the first discharge tube (223a) via the wiring (11), and the second direction (Y) intersects with the first direction (X).

5. The surge protection device according to claim 3, characterized in that, The signal surge protection module (22b) comprises a first wiring terminal (221b), a second discharge tube (222b), a transient suppression diode (223b) and a second wiring terminal (224b) arranged along a second direction (Y) and electrically connected to each other; The distance between the grounding portion (21) of the signal surge protection module (2b) and the second discharge tube (222b) along the second direction (Y) is less than or equal to the distance between the second discharge tube (222b) and the transient suppression diode (223b); the grounding portion (21) is connected to the second discharge tube (222b) via the wiring (11); and the second direction (Y) intersects with the first direction (X).

6. The surge protection device according to claim 5, characterized in that, The signal surge protection module (22b) further includes a fuse resistor (225b), and the fuse resistor (225b) is connected in series between the second discharge tube (222b) and the transient suppression diode (223b) along the second direction (Y); The fuse resistor (225b) includes a first connection end, a second connection end, and a fuse body. The fuse body extends along the second direction (Y), and its two ends are connected to the circuit board (1) through the first connection end and the second connection end. The grounding portion (21) is arranged at least partially overlapping with the fuse resistor (225b) in the positive projection of the signal surge protection module (22b) along the first direction (X). The trace (11) is connected to the grounding portion (21) by passing through the gap between the first connection end and the second connection end of the second discharge tube (222b).

7. The surge protection device according to claim 6, characterized in that, At the position of the fuse resistor (225b), the size of the fuse body along the second direction (Y) is larger than the size of the trace (11) along the second direction (Y).

8. The surge protection device according to claim 5, characterized in that, The signal surge protection module (22b) includes a digital signal surge protection module and an analog signal surge protection module. The number of the analog signal surge protection modules is more than two and they are located on both sides of the digital signal surge protection module along the first direction (X).

9. An electric control cabinet, characterized in that, It includes a housing, a controller, and the surge protection device (10) according to any one of claims 1 to 8. The surge protection device (10) is arranged in the housing and is connected to the controller.

10. A wind power generating set, characterized in that, It includes a fan component, a plurality of sensors, and the electrical control cabinet according to claim 9. The sensors are configured to detect the working state of the fan component, and each of the sensors corresponds to a surge protection module (22) and is connected to the controller through the surge protection module (22); The fan component includes a nacelle (200), and a plurality of the sensors are arranged on the nacelle (200) and include at least one of a wind direction sensor and a wind speed sensor.

Images