A surge protector device for signal acquisition protection of wind turbine blades

Abstract

A surge protector for signal acquisition protection of wind turbine blades includes a metal cabinet, a grounding component, and multiple surge protection units deployed within the metal cabinet. Each surge protection unit is connected between the input and output interfaces of the metal cabinet and grounded through the grounding component. Each surge protection unit includes multiple transient voltage suppressor diodes (TVS), with one end of each TVS connected to the interconnecting line between the input and output interfaces and the other end grounded. Using the surge protector proposed in this invention, the wind turbine control system can be effectively protected from damage caused by induced overcurrent and induced overvoltage generated by lightning, ensuring the stable operation of the integrated wind turbine control system and greatly improving equipment efficiency and quality.

Description

Technical Field

[0001] This utility model relates to the field of electrical lightning protection and shielding equipment, specifically a lightning arrester device for signal acquisition protection of wind turbine blades. Background Technology

[0002] Wind farms are mostly located in high-altitude, mountain ridge, and other areas prone to icing. During the annual rainy season, wind turbine blades are susceptible to lightning strikes, which can damage the data acquisition module of the wind turbine de-icing system, affecting its normal operation. The wind turbine de-icing system contains both low-speed signals such as analog signals and high-speed signals such as digital inputs / outputs and communication signals. Appropriate lightning protection modules need to be designed for different signals to prevent the wind turbine blades from releasing electrical energy when lightning strikes, ensuring the normal operation of internal components. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a surge protector device for signal acquisition protection of wind turbine blades, comprising a metal cabinet, a grounding component, and multiple surge protection units deployed within the metal cabinet. Each surge protection unit is connected between the input and output interfaces of the metal cabinet and grounded through the grounding component. Each surge protection unit includes multiple transient voltage suppressor diodes (TVS), with one end of each TVS connected to the interconnecting line between the input and output interfaces and the other end grounded.

[0004] Furthermore, for the CAN communication signal lines, a GDT discharge tube is connected between the CANbusL signal and the CANbusH signal lines, and the grounding electrode of the GDT discharge tube is connected to the grounding terminal of the metal cabinet.

[0005] Furthermore, at least one transient voltage suppressor diode (TVS) is connected between the CANbusL signal and the CANbusH signal lines.

[0006] Furthermore, multiple sets of transient voltage suppressor diodes (TVS) are connected in parallel on the interconnect lines of the CANbusL signal and CANbusH signal input and output interfaces.

[0007] Furthermore, a current-limiting resistor is connected between the interconnecting lines of the CANbusL and CANbusH signal input and output interfaces, the GDT discharge tube, and the transient suppression diode TVS.

[0008] Furthermore, the transient voltage suppressor diode (TVS) and the gas discharge tube (GDT) in the lightning protection unit are both installed inside the metal cabinet via guide rails. The GDT and TVS are both connected to the metal cabinet via guide rails and then grounded via grounding components.

[0009] Furthermore, the metal cabinet is also equipped with a heat dissipation and ventilation device.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial effects: The lightning protection device proposed in this utility model can effectively protect the wind turbine control system from damage caused by induced overcurrent and induced overvoltage generated by lightning, ensuring the stable operation of the wind turbine integrated control system and greatly improving equipment efficiency and quality. Because the lightning protection device for wind turbine blade signal acquisition protection adopts a universal and modular interface lightning protection circuit design, it can be widely used in different models of products and different types of equipment. Attached Figure Description

[0011] Figure 1 : Structural diagram of the metal cabinet;

[0012] Figure 2 : Schematic diagram of the circuit principle of the lightning protection unit. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] like Figure 1 and Figure 2 As shown. A surge protector device for signal acquisition protection of wind turbine blades includes a metal cabinet 1, a grounding component 2, and multiple surge protection units deployed inside the metal cabinet 1. The surge protection units are connected between the input interface and the output interface of the metal cabinet 1 and grounded through the grounding component 2. Each surge protection unit includes multiple transient voltage suppressor diodes (TVS), one end of which is connected to the interconnection line between the input interface and the output interface, and the other end is grounded.

[0015] In this embodiment, the grounding component 2 is a grounding bolt connected to the metal cabinet 1. External signal outputs are connected to the metal cabinet 1 via connectors. For wind turbine integrated control systems, generally, there are low-speed input / output signals such as analog signals, as well as high-speed digital input / output signals such as CAN communication and DI / DO. For low-speed signals, transient voltage suppressor diodes (TVS) are connected to the interconnecting lines of the input and output interfaces in the lightning protection unit to discharge and absorb induced lightning current coupled to the interconnecting cables.

[0016] In a more preferred embodiment, for the CAN communication signal line, a GDT discharge tube is also connected between the CANbusL and CANbusH signal lines, and the grounding electrode of the GDT discharge tube is connected to the grounding terminal of the metal cabinet 1. The GDT discharge tube is a three-stage discharge tube; before its discharge breakdown, the three-terminal gas discharge tube presents a high impedance state; once it breaks down, it quickly switches to a low impedance state, effectively bypassing the surge current. Furthermore, when both the CANbusL and CANbusH signals experience lightning discharge breakdown, they can conduct synchronously without generating a potential difference, ensuring that the communication line signal is not interfered with or distorted.

[0017] In a more preferred embodiment, multiple sets of transient voltage suppressor diodes (TVS) are connected in parallel on the interconnect lines of the CANbusL and CANbusH signal input and output interfaces. In this embodiment, two sets of TVS are connected in parallel between the CANbusL and CANbusH signal lines. Transient voltage suppressor diodes T1 to T3 are connected in parallel on the CANbusL signal input and output interconnect lines, wherein transient voltage suppressor diodes T2 and T3 are connected in series as one group; transient voltage suppressor diodes T4 to T6 are connected in parallel on the CANbusH signal input and output interconnect lines, wherein transient voltage suppressor diodes T5 and T6 are connected in series as one group. The combination of multiple sets of series-parallel transient voltage suppressor diodes (TVS) can improve the lightning protection level between CAN communication lines.

[0018] In a more preferred embodiment, at least one transient voltage suppressor diode (TVS) is further connected between the CANbusL and CANbusH signal lines. Based on the above preferred embodiment, transient voltage suppressor diodes T3 and T6 are respectively connected between the CANbusL and CANbusH signal lines. These are used to limit the differential signal voltage between the two. When transient interference such as lightning or surges causes the voltage difference between CANH and CANL to exceed a safe threshold, the TVS will quickly conduct, clamping the voltage within a safe range and preventing excessively high differential voltage from damaging the CAN transceiver.

[0019] In a more preferred embodiment, current-limiting resistors are connected between the interconnects of the CANbusL and CANbusH signal input and output interfaces, the GDT discharge tube, and the TVS transient voltage suppressor diode. Based on the above preferred embodiment, current-limiting resistors R3 and R4 are connected between the CANbusL and CANbusH signals, respectively, and current-limiting resistors R1 and R2 are connected between the interconnects of the CANbusL and CANbusH signal input and output interfaces, respectively. These current-limiting resistors, in conjunction with the GDT discharge tube and TVS transient voltage suppressor diode, limit overcurrent and improve the lightning protection level.

[0020] In a more preferred embodiment, the transient voltage suppressor diode (TVS) and the grounding discharge tube (GDT) in the surge protection unit are both installed inside the metal cabinet 1 via rails 3. The GDT and TVS are connected to the metal cabinet 1 via rails 3 and then grounded via grounding component 2. When induced lightning current enters the surge protection unit from the input interface, it is discharged to the cabinet ground via rails 3. The induced lightning current on the cabinet ground is then discharged to the earth via grounding studs on the cabinet.

[0021] In a more preferred embodiment, the metal cabinet 1 is further provided with a heat dissipation and ventilation device. The heat dissipation and ventilation device improves airflow within the metal cabinet 1, preventing the internal lightning protection unit from overheating.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surge protector device for signal acquisition protection of wind turbine blades, comprising a metal cabinet (1), a grounding component (2), and multiple surge protection units deployed within the metal cabinet (1), wherein the surge protection units are connected between the input and output interfaces of the metal cabinet (1) and grounded through the grounding component (2), characterized in that, The lightning protection unit includes multiple transient voltage suppressor diodes (TVS). One end of each TVS is connected to the interconnect line between the input and output interfaces, and the other end is grounded.

2. The surge protector device for signal acquisition and protection of wind turbine blades as described in claim 1, characterized in that, For the CAN communication signal line, a GDT discharge tube is also connected between the CANbusL signal and the CANbusH signal line. The grounding electrode of the GDT discharge tube is connected to the grounding terminal of the metal cabinet (1).

3. The surge protector device for signal acquisition and protection of wind turbine blades as described in claim 2, characterized in that, At least one transient suppression diode (TVS) is also connected between the CANbusL signal and the CANbusH signal lines.

4. The surge protector device for signal acquisition and protection of wind turbine blades as described in claim 3, characterized in that, Multiple sets of transient voltage suppressor diodes (TVS) are connected in parallel on the interconnect lines of the CANbusL and CANbusH signal input and output interfaces.

5. The surge protector device for signal acquisition and protection of wind turbine blades as described in claim 4, characterized in that, A current-limiting resistor is also connected between the interconnecting lines of the CANbusL and CANbusH signal input and output interfaces, the GDT discharge tube, and the transient suppression diode TVS.

6. The surge protector device for signal acquisition and protection of wind turbine blades as described in claim 5, characterized in that, The transient suppression diode TVS and GDT discharge tube in the lightning protection unit are installed inside the metal cabinet (1) via the guide rail (3). The GDT discharge tube and transient suppression diode TVS are connected to the metal cabinet (1) via the guide rail (3) and then grounded via the grounding component (2).

7. The surge protector device for signal acquisition and protection of wind turbine blades as described in claim 1, characterized in that, The metal cabinet (1) is also equipped with a heat dissipation and ventilation device.

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