Improved wind driven generator blade electric pulse deicing device

Abstract

The utility model relates to the technical field of wind power equipment, in particular to an improved electric pulse deicing device for blades of a wind driven generator. The wind driven generator blade comprises a blade body, a cavity is formed in the blade body, the deicing device comprises a deicing controller, a pulse power source and a plurality of pulse deicing units connected with the pulse power source in parallel, any pulse deicing unit comprises a pulse coil and a metal sheet, and the area of the metal sheet is larger than that of the pulse coil. The pulse coil is connected with a pulse power supply wire, the metal sheet and the pulse coil are fixed in the blade body or on the cavity wall of the cavity, the metal sheet and the pulse coil are oppositely arranged, an opposite surface gap is formed between the metal sheet and the pulse coil, and the multiple groups of pulse deicing units are distributed on the wind driven generator blade at intervals. According to the electric pulse deicing device, the existing electric pulse deicing technology is improved, the structure of the electric pulse deicing device for the wind driven generator blade is simplified, the practicability and the safety are improved, the installation cost is reduced, and the purpose of efficient deicing can be achieved while energy is saved.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, and in particular to an improved electric pulse de-icing device for wind turbine blades. Background Technology

[0002] Wind energy, as a green and clean renewable energy source, has enormous development potential. my country is rich in wind power resources, and the wind power industry is developing rapidly, with the total installed capacity steadily increasing. However, wind turbine blades are prone to icing in winter. Icing can alter the aerodynamic structure of the blades, leading to reduced power generation efficiency, shutdown of the wind turbine, or even severe deformation or breakage due to uneven load on the blades caused by icing.

[0003] Existing wind turbine blade de-icing technologies commonly include heating de-icing, coating de-icing, and drone de-icing. However, heating de-icing consumes a lot of energy and is not economically viable; the hydrophobic coating in coating de-icing is expensive and prone to peeling; and drone de-icing is inefficient and complex to operate. These existing technologies generally have certain shortcomings that result in poor wind turbine blade de-icing performance. Therefore, there is an urgent need for a wind turbine blade de-icing technology that is simple in structure, consumes less energy, and is highly practical.

[0004] A wind turbine blade de-icing device based on electric pulse (Chinese Patent No. 202111497200.9) discloses an electric pulse de-icing method. By installing a pulse coil inside the wind turbine blade and applying a large pulse current to the pulse coil, eddy currents are generated on the metal skin of the wind turbine blade. An interaction force is generated between the eddy currents and the pulse coil, which in turn drives the metal skin to produce micro-amplitude, high-acceleration mechanical vibration, causing the ice on the surface of the metal skin to vibrate and fall off, thus achieving the purpose of de-icing. However, the technical problem with this patent is that the surface of the wind turbine blades must be covered with a metal skin. Existing wind turbine blades are generally made of fiberglass, a lightweight and high-strength non-metallic material. If a metal skin is applied to the outside of existing wind turbine blades, firstly, the weight of the wind turbine blades will increase significantly, affecting the working efficiency of the generator set and the service life of the wind turbine blades; secondly, after the wind turbine blades are covered with a metal skin, gaps are likely to appear between the metal skin and the non-metallic blade material because the coefficients of thermal expansion of the metal skin and the non-metallic material are different, which will change the shape of the blades, thereby changing the aerodynamic performance, reducing the wind energy capture capacity, and thus reducing the power generation efficiency, and even causing the metal skin to fall off; finally, the outer metal skin will greatly increase the risk of the entire wind turbine generator set being struck by lightning, posing a high safety risk.

[0005] In summary, the wind turbine blade de-icing technology disclosed in the "Electrical Pulse-Based Wind Turbine Blade De-icing Device" (Patent No. 202111497200.9) is difficult to effectively promote in practical applications. Utility Model Content

[0006] Based on the above, the purpose of this utility model is to improve the existing wind turbine blade de-icing technology and provide an improved wind turbine blade electric pulse de-icing device to achieve efficient and practical wind turbine blade de-icing.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An improved electric pulse de-icing device for wind turbine blades, wherein the wind turbine blade includes a blade body with a cavity inside, characterized in that the de-icing device includes a de-icing controller, a pulse power supply, and multiple sets of pulse de-icing units connected in parallel with the pulse power supply, each set of pulse de-icing units including a pulse coil and a metal plate, the pulse coil being connected to the pulse power supply wire, the metal plate and the pulse coil being fixed inside the blade body or on the cavity wall, the metal plate and the pulse coil being arranged facing each other with a gap between their opposing surfaces.

[0009] As a preferred embodiment of an improved electric pulse de-icing device for wind turbine blades, the multiple sets of pulse de-icing units are spaced apart on the wind turbine blades.

[0010] As a preferred embodiment of an improved electric pulse de-icing device for wind turbine blades, the center lines of the metal sheet and the pulse coil of any set of pulse de-icing units coincide, and both the pulse coil and the metal sheet are thin sheet-like structures that are attached to the wind turbine blade.

[0011] As a preferred embodiment of an improved electric pulse de-icing device for wind turbine blades, the pulse coil is a spiral annular coil, and the metal sheet is a metal disc with an area larger than that of the pulse coil.

[0012] As a preferred embodiment of an improved electric pulse de-icing device for wind turbine blades, the pulse power supply includes a step-up transformer, a current-limiting resistor, a charging switch, a capacitor, and a clamping diode. The step-up transformer is connected to the capacitor via the current-limiting resistor and the charging switch to form a circuit, and the capacitor is connected in parallel with the clamping diode.

[0013] As a preferred embodiment of an improved electric pulse de-icing device for wind turbine blades, the pulse coil of any group of the pulse de-icing units is connected in parallel with the pulse power supply.

[0014] As a preferred embodiment of an improved electric pulse de-icing device for wind turbine blades, the pulse coils in multiple sets of pulse de-icing units can be connected in series first, and then connected in parallel with the pulse power supply to form a circuit.

[0015] As a preferred embodiment of an improved electric pulse de-icing device for wind turbine blades, a discharge switch is provided between the pulse coil and the pulse power supply.

[0016] As a preferred embodiment of an improved electric pulse de-icing device for wind turbine blades, the de-icing device further includes an icing sensor. The de-icing controller is communicatively connected to the charging switch, the discharging switch, the temperature sensor, and the icing sensor. The de-icing controller controls the charging switch and the discharging switch to be turned on or off based on the temperature signal collected by the temperature sensor or the icing signal collected by the icing sensor.

[0017] As a preferred embodiment of an improved electric pulse de-icing device for wind turbine blades, the wind turbine blade further includes a hub nacelle connected to the blade body, the temperature sensor is disposed outside the hub nacelle, the pulse power supply, the discharge switch and the de-icing controller are disposed inside the hub nacelle, and the icing sensor is disposed on the surface of the blade body.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model improves upon existing electric pulse de-icing technology, simplifies the structure of the electric pulse de-icing device for wind turbine blades, and enhances practicality and safety while reducing installation costs.

[0020] 2. This utility model uses electric pulse de-icing, which can achieve efficient de-icing while saving energy.

[0021] 3. The step-up transformer of this utility model can use a common iron-core transformer, which has good insulation performance and high reliability, and can achieve an average fault-free working life of 20 years, thereby minimizing the failure rate and maintenance cost of the wind turbine blade de-icing system. In addition, since the charging current does not need to be too large and the charging time has no special requirements, it only needs to be fully charged within tens to hundreds of seconds. Therefore, the step-up transformer can be a small-power, small-size product, which is convenient for the installation of the de-icing device. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an improved electric pulse de-icing device for wind turbine blades provided by this utility model;

[0024] Figure 2-a This is an enlarged schematic diagram of the spiral annular flat-wound coil of an improved wind turbine blade electrical pulse de-icing device provided by this utility model;

[0025] Figure 2-b This is an enlarged schematic diagram of the spiral annular vertical winding coil of an improved wind turbine blade electrical pulse de-icing device provided by this utility model;

[0026] Figure 3 yes Figure 1 A partially enlarged schematic diagram of the medium-pulse de-icing unit 4;

[0027] Figure 4 This is a circuit diagram of an improved electric pulse de-icing device for wind turbine blades provided by this utility model;

[0028] Figure 5 This is a schematic diagram of the adjacent group circuit of an improved wind turbine blade electric pulse de-icing device provided by this utility model;

[0029] Figure 6 This is a schematic diagram of the electric pulse de-icing principle of an improved wind turbine blade electric pulse de-icing device provided by this utility model.

[0030] Figure label:

[0031] 1-Blade body; 2-Cavity; 3-Hub compartment; 4-Pulse de-icing unit; 41-Metal sheet; 42-Pulse coil; 5-Circuit wire; 6-Pulse power supply; 61-Step-up transformer T1; 62-Current-limiting resistor R1; 63-Charging switch Q0; 64-Capacitor C1; 65-Clamping diode D1; 7-De-icing controller; 8-Discharge switch Q (Q1, Q2, and Q3 in the attached diagram are all discharge switches Q); 9-Temperature sensor; 10-Icing sensor; 11-IoT transceiver module; 12-IoT icing sensor. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0036] This embodiment provides an improved electrical pulse de-icing device for wind turbine blades, such as... Figure 1As shown, the wind turbine blade includes a blade body 1 and a hub nacelle 3. The blade body 1 has a cavity 2. The de-icing device includes multiple pulse de-icing units 4, circuit wires 5, a pulse power supply 6, and a de-icing controller 7. Each pulse de-icing unit 4 also includes a metal plate 41 and a pulse coil 42. Multiple pulse de-icing units 4 are spaced apart on each blade body 1. The metal plate 41 and pulse coil 42 are fixed to the blade body 1 or the cavity wall of the cavity 2 through an integral molding process. The metal plate 41 and pulse coil 42 are positioned facing each other, with their center lines coinciding and a gap between their opposing surfaces. This gap refers to the minute distance between the two opposing planes of the metal plate 41 and pulse coil 42. The metal plate 41 and pulse coil 42 generate an induced magnetic field and pulse force through this gap, causing the blade body 1 to produce a small amplitude and high acceleration damped vibration. This causes the ice layer on the surface of the blade body 1 to peel off, shatter, and fall off, achieving the de-icing purpose. The specific spacing of the opposing surface gap is designed according to the actual situation.

[0037] For example, the metal sheet 41 and the pulse coil 42 can both be fixed inside the blade body 1, or both can be fixed on the cavity wall of the cavity 2, or as shown in the example. Figure 1 and Figure 3 The metal sheet 41 shown is fixed inside the blade body 1, and the pulse coil 42 is partially fixed on the cavity wall of the cavity 2. As long as the premise that the metal sheet 41 and the pulse coil 42 are arranged facing each other and there is a gap between their relative surfaces is met, the specific installation method of the metal sheet 41 and the pulse coil 42 can be flexibly selected according to the actual situation, so as to ensure that the metal sheet 41 and the pulse coil 42 can generate an induced magnetic field and pulse force through the gap between their relative surfaces, while achieving a good fixing effect.

[0038] Specifically, if Figure 2-a , Figure 2-b and Figure 3 As shown, pulse coil 42 is a helical loop coil, and the winding method of the helical loop coil can be a flat winding (see reference). Figure 2-a ) or vertical winding type (reference) Figure 2-b Both winding methods can meet the normal operating requirements of the de-icing device. The actual winding method is selected according to the actual situation. In this embodiment, a spiral ring-shaped flat-wound coil is used for explanation. The metal sheet 41 is a metal disc with an area slightly larger than that of the pulse coil 42. The metal sheet 41 and the pulse coil 42 are thin sheet structures that fit into the blade body 1, and the thickness of the metal sheet 41 is slightly thinner than that of the pulse coil 42, so as not to change the outer contour of the blade body 1, and thus not to affect the aerodynamic performance of the blade body 1. The specific values ​​such as the thickness of the metal sheet 41 and the pulse coil 42 and the number of turns of the pulse coil 42 are comprehensively designed according to the size of the wind turbine blade and the de-icing power requirements.

[0039] Furthermore, any one of the pulse coils 42 is connected in parallel to the pulse power supply 6 via a circuit wire 5. The circuit wire 5 can be integrally molded and embedded in the blade body 1, or it can be closely attached to the cavity wall of the cavity 2. The specific setting method is selected according to the actual situation. The pulse power supply 6 and the de-icing controller 7 are located inside the hub nacelle 3 of the wind turbine. The de-icing controller 7 has a preset de-icing program, a signal processing module, and a timing control module.

[0040] In some specific embodiments, such as Figure 1 and Figure 4 As shown, the pulse power supply 6 includes a step-up transformer T1, a current-limiting resistor R1, a charging switch Q0, a capacitor C1, and a clamping diode D1. The step-up transformer T1, through the current-limiting resistor R1 and the charging switch Q0, is connected to the capacitor C1 to form a circuit to supply power to the capacitor C1. The capacitor C1 is connected in parallel with the clamping diode D1. The pulse coil 42 of any group of pulse de-icing units 4 is connected in parallel with the pulse power supply 6. A discharge switch Q is provided between any pulse coil 42 and the pulse power supply 6. The discharge switch Q is also located inside the hub nacelle 3 of the wind turbine. The discharge switch Q is used to control the energization of the corresponding pulse coil 42. The discharge switch Q and the charging switch Q0 are both composed of thyristors. The de-icing controller 7 is communicatively connected to the discharge switch Q, the charging switch Q0, and the temperature sensor 9 outside the hub nacelle 3. The de-icing controller 7 controls the discharge switch Q and the charging switch Q0 to be turned on or off according to the external temperature signal received by the temperature sensor 9. Figure 4 and Figure 5 Q1, Q2 and Q3 are all discharge switches Q. In this embodiment, the discharge switch Q and the pulse coil 42 form three branches. In practical applications, there can be multiple branches, such as 2, 4 or 5.

[0041] Optionally, refer again Figure 1 and Figure 4 An icing sensor 10 is also provided on the surface of the blade body 1. The icing sensor 10 is connected to the de-icing controller 7. The icing sensor 10 is used to detect whether the surface of the blade body 1 is icy. When icing occurs on the surface of the blade body 1, the icing sensor 10 sends an icing signal to the de-icing controller 7, and the de-icing controller 7 then controls the de-icing device to perform de-icing.

[0042] Optionally, an IoT transceiver module 11 is installed inside the hub nacelle 3, and an IoT icing sensor 12 is installed on the surface of the blade body 1. The IoT icing sensor 12 is communicatively connected to the IoT transceiver module 11, the IoT transceiver module 11 is communicatively connected to the de-icing controller 7, and the IoT transceiver module 11 is also communicatively connected to a remote device. The icing sensor 10 is used to detect whether ice has formed on the surface of the blade body 1. When ice forms on the surface of the blade body 1, the IoT icing sensor 12 sends an icing signal to the IoT transceiver module 11. The remote device can query the icing signal received by the IoT transceiver module 11 and manually control the IoT transceiver module 11 to send a de-icing command to the de-icing controller 7. The de-icing controller 7 then controls the de-icing device to perform de-icing. It can be understood that the temperature sensor 9, the icing sensor 10, and the IoT icing sensor 12 are selectively installed based on a comprehensive consideration of the actual application requirements of the wind turbine, the on-site working conditions, and the project cost.

[0043] In some specific embodiments, a power supply is configured inside the hub nacelle 3 of the wind turbine, which supplies power to the step-up transformer T1, the de-icing controller 7, and the Internet of Things transceiver module 11. The step-up transformer T1 boosts the input 220V or 380V AC power to 500V~1000V. Then, the de-icing controller 7 turns on the charging switch Q0 to charge the capacitor C1. In order to prevent the voltage at the end of the capacitor C1 from being too low and causing the charging current to be too large in the initial stage of charging, a current-limiting resistor R1 is set to limit the current in the initial stage of charging. Since the charging switch Q0 is a unidirectional thyristor, there is no need to set a rectifier circuit at the output end of the step-up transformer T1.

[0044] In some specific embodiments, the pulse coils 42 in the multiple pulse de-icing units 4 can be connected in series first, and then connected in parallel with the pulse power supply 6 to form a circuit. This design can reduce the number of wiring wires 5, reduce costs, and lighten the load on the blade body 1, thereby improving safety. The specific number of series groups of the multiple pulse coils 42 is designed according to the actual situation, and can be two, three, four, etc. This design also requires a corresponding increase in the charging voltage of the capacitor C1, and a capacitor C1 with a higher withstand voltage and larger capacity should be selected to keep the pulse current of any pulse coil 42 constant. For example, as shown in the figure... Figure 5As shown, the pulse coils 42 in two adjacent pulse de-icing units 4 are first connected in series to form an adjacent group, and then multiple adjacent groups are connected in parallel with the pulse power supply 6 to form a circuit. In this case, the charging voltage of capacitor C1 needs to be doubled accordingly. For example, if any pulse coil 42 is directly connected in parallel with the pulse power supply 6, capacitor C1 needs to be charged to 500V; if two adjacent pulse coils 42 are connected in series to form an adjacent group, and then directly connected in parallel with the pulse power supply 6, capacitor C1 needs to be charged to 1000V; if three pulse coils 42 are connected in series to form an adjacent group, capacitor C1 needs to be charged to 1500V, and so on.

[0045] In some specific embodiments, the de-icing method of the wind turbine blade electrical pulse de-icing device is automatic de-icing and manual de-icing. The power supply in the hub nacelle 3 of the wind turbine supplies power to the step-up transformer T1, the de-icing controller 7, and the IoT transceiver module 11. When the temperature sensor 9 detects that the external temperature is less than or equal to 0°C, or when the icing sensor 10 and the IoT icing sensor 12 detect an icing signal, the de-icing controller 7 starts according to the received signal: when the temperature signal received from the temperature sensor 9 shows that the external temperature is less than or equal to 0°C, the timing control module of the de-icing controller 7 starts and wakes up the de-icing program for automatic de-icing according to a preset time interval; when the icing signal received from the icing sensor 10, the de-icing controller 7 controls the de-icing device to perform automatic de-icing; when the remote device queries the IoT transceiver module 11 and receives an icing signal, it manually controls the IoT transceiver module 11 to send a de-icing command to the de-icing controller 7, and the de-icing controller 7 then starts de-icing to achieve manual de-icing.

[0046] Specifically, the steps include the following:

[0047] Step 1: The power supply in the hub compartment 3 supplies power to the de-icing controller 7 and the IoT transceiver module 11;

[0048] Step 2-1: Set the de-icing interval of the de-icing controller 7 and start timed de-icing. When the cabin temperature sensor detects that the external temperature is less than or equal to 0°C, the timed control module of the de-icing controller 7 is activated and wakes up the de-icing program according to the preset time interval to start automatic de-icing.

[0049] Step 2-2: When the icing sensor 10 detects icing on the surface of the blade body 1, the icing sensor 10 sends an icing signal to the de-icing controller 7, and the de-icing controller 7 starts automatic de-icing.

[0050] Steps 2-3: When the IoT icing sensor 12 detects icing on the surface of the blade body 1, the IoT icing sensor 12 sends an icing signal to the IoT transceiver module 11. The remote device queries the IoT transceiver module 11 to receive the icing signal and manually controls the IoT transceiver module 11 to send a de-icing command to the de-icing controller 7, which then starts the de-icing process.

[0051] Step 3: Under the action of the de-icing controller 7, the charging switch Q0 is turned on, and the power supply in the hub compartment 3 inputs 220V or 380V AC power to the step-up transformer T1.

[0052] Step 4: The step-up transformer T1 boosts the input voltage to 500-1000V, and through the protection of the current-limiting resistor R1, the capacitor C1 is charged via the charging switch Q0.

[0053] Step 5: After charging is complete, the de-icing controller 7 controls the charging switch Q0 to turn off and controls the discharge switch Q connected to the pulse coil 42 to turn on.

[0054] Step 6: Capacitor C1 discharges instantaneously into pulse coil 42, such as... Figure 6 As shown, a rapidly formed and rapidly decaying induced magnetic field is established around the metal sheet 41 and the pulse coil 42. Under the action of the induced magnetic field, a sub-millisecond level pulse force with an acceleration of up to 100g and a magnitude of hundreds to thousands of Newtons is generated between the metal sheet 41 and the pulse coil 42. The pulse force is in opposite directions. The metal sheet 41 and the pulse coil 42 drive the blade body 1 to generate a decaying vibration with a small amplitude and high acceleration, causing the ice layer on the surface of the blade body 1 to peel off, crush and fall off, thus achieving the purpose of de-icing.

[0055] Step 7: When the cabin temperature sensor detects that the external temperature is greater than 0°C or the icing sensor 10 and the IoT icing sensor 12 do not detect an icing signal, the de-icing controller 7 controls the discharge switch Q and the charging switch Q0 to turn off, and the de-icing action ends.

[0056] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0057] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An improved electro-pulse de-icing device for wind turbine blades, wherein the wind turbine blade includes a blade body, the blade body having a cavity, characterized in that, The de-icing device includes a de-icing controller, a pulse power supply, and multiple sets of pulse de-icing units connected in parallel with the pulse power supply. Each set of pulse de-icing units includes a pulse coil and a metal plate. The pulse coil is connected to the pulse power supply wire. The metal plate and the pulse coil are fixed inside the blade body or on the cavity wall. The metal plate and the pulse coil are arranged facing each other and have a gap between their opposing surfaces.

2. The improved wind turbine blade electro-pulse de-icing device according to claim 1, characterized in that, The multiple sets of pulse de-icing units are distributed at intervals on the wind turbine blades.

3. An improved wind turbine blade electro-pulse de-icing device according to claim 2, characterized in that, The center lines of the metal sheet and the pulse coil in any one of the pulse de-icing units coincide, and both the pulse coil and the metal sheet are thin sheet-like structures that are attached to the wind turbine blades.

4. An improved wind turbine blade electro-pulse de-icing device according to claim 2, characterized in that, The pulse coil is a spiral loop coil, and the metal sheet is a metal disc with an area larger than that of the pulse coil.

5. An improved wind turbine blade electro-pulse de-icing device according to claim 1, characterized in that, The pulse power supply includes a step-up transformer, a current-limiting resistor, a charging switch, a capacitor, and a clamping diode. The step-up transformer is connected to the capacitor via the current-limiting resistor and the charging switch to form a circuit. The capacitor is connected in parallel with the clamping diode.

6. An improved wind turbine blade electro-pulse de-icing device according to claim 5, characterized in that, The pulse coil of any one of the pulse de-icing units is connected in parallel with the pulse power supply.

7. An improved wind turbine blade electro-pulse de-icing device according to claim 6, characterized in that, The pulse coils in the multiple sets of pulse de-icing units can be connected in series first, and then connected in parallel with the pulse power supply to form a circuit.

8. An improved wind turbine blade electro-pulse de-icing device according to claim 7, characterized in that, A discharge switch is provided between the pulse coil and the pulse power supply.

9. An improved wind turbine blade electro-pulse de-icing device according to claim 8, characterized in that, The de-icing device further includes a temperature sensor and an icing sensor. The de-icing controller is communicatively connected to the charging switch, the discharging switch, the temperature sensor, and the icing sensor. The de-icing controller controls the charging switch and the discharging switch to turn on or off based on the temperature signal collected by the temperature sensor or the icing signal collected by the icing sensor.

10. An improved wind turbine blade electro-pulse de-icing device according to claim 9, characterized in that, The wind turbine blade also includes a hub nacelle connected to the blade body. The temperature sensor is located outside the hub nacelle, the pulse power supply, the discharge switch and the de-icing controller are located inside the hub nacelle, and the icing sensor is located on the surface of the blade body.

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