Double-coil electric pulse deicing device for blades of wind driven generator
By installing a double-coil electric pulse deicing device inside the wind turbine blades and using the mechanical vibration generated by the induced magnetic field to de-ice, the problems of high energy consumption, poor safety and increased weight in the existing technology are solved, and an efficient and safe de-icing effect is achieved.
Patent Information
- Application Number
- CN202423049456.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing wind turbine blade de-icing technology has problems such as high energy consumption, high cost, poor safety and affected power generation efficiency. In particular, the electric pulse-based de-icing device requires a metal skin to be laid on the outside of the fiberglass blades, which leads to increased weight, changes in aerodynamic performance and the risk of lightning strikes.
A double-coil electric pulse deicing device for wind turbine blades is used. The first and second pulse coils in the blades generate an induced magnetic field in the relative surface gap. De-icing is achieved through mechanical vibration with small amplitude and high acceleration, avoiding the use of metal skins, simplifying the structure and reducing energy consumption.
It achieves efficient and safe de-icing effects, reduces installation costs and failure rates, maintains the aerodynamic performance and safety of the blades, and avoids weight gain and the risk of lightning strikes.
Smart Images
Figure CN223482821U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wind power equipment technology, and in particular to a dual-coil 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 a dual-coil electric pulse de-icing device for wind turbine blades, so as 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] A dual-coil 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, wherein each set of pulse de-icing units includes a first pulse coil and a second pulse coil connected in series, the first pulse coil and the second pulse coil being fixed inside the blade body or on the cavity wall, the first pulse coil and the second pulse coil being arranged facing each other with a gap between their opposing surfaces, and the first pulse coil and the second pulse coil being wound in opposite directions.
[0009] As a preferred embodiment of a dual-coil electric pulse de-icing device for wind turbine blades, the multiple sets of pulse de-icing units are distributed at intervals on the wind turbine blades.
[0010] As a preferred embodiment of a dual-coil electric pulse de-icing device for wind turbine blades, the center lines of the first pulse coil and the second pulse coil coincide, and both the first pulse coil and the second pulse coil are thin sheet-like structures that are attached to the wind turbine blades.
[0011] In a preferred embodiment of a dual-coil electric pulse de-icing device for wind turbine blades, both the first pulse coil and the second pulse coil are spiral loop coils.
[0012] As a preferred embodiment of a dual-coil 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] In a preferred embodiment of a dual-coil electric pulse de-icing device for wind turbine blades, the pulse coil of any one of the pulse de-icing units is connected in parallel with the pulse power supply.
[0014] As a preferred embodiment of a dual-coil electric pulse de-icing device for wind turbine blades, multiple sets of the 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] In a preferred embodiment of a dual-coil electric pulse de-icing device for wind turbine blades, a discharge switch is provided between the pulse de-icing unit and the pulse power supply.
[0016] As a preferred embodiment of a dual-coil electric pulse de-icing device for wind turbine blades, 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, respectively. 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 a dual-coil 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 1This is a schematic diagram of the structure of a dual-coil 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 a dual-coil electric pulse de-icing device for wind turbine blades provided by this utility model;
[0025] Figure 2-b This is an enlarged schematic diagram of the spiral annular vertical winding coil of a dual-coil electric pulse de-icing device for wind turbine blades 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 a dual-coil electric pulse de-icing device for wind turbine blades provided by this utility model;
[0028] Figure 5 This is a circuit diagram of adjacent groups of a dual-coil electric pulse de-icing device for wind turbine blades provided by this utility model;
[0029] Figure 6 This is a schematic diagram of the electric pulse de-icing principle of a dual-coil electric pulse de-icing device for wind turbine blades provided by this utility model.
[0030] Figure label:
[0031] 1-Blade body; 2-Cavity; 3-Hub compartment; 4-Pulse de-icing unit; 41-First pulse coil; 42-Second 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 the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in 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 a dual-coil 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 a pulse de-icing unit 4, circuit wires 5, a pulse power supply 6, and a de-icing controller 7. Each pulse de-icing unit 4 also includes a first pulse coil 41 and a second pulse coil 42. Multiple pulse de-icing units 4 are distributed at intervals on each blade body 1. The first pulse coil 41 and the second pulse coil 42 are fixed to the blade body 1 or the cavity wall of the cavity 2 by an integral molding process. The first pulse coil 41 and the second pulse coil 42 are arranged facing each other, with their center lines coinciding and a gap between their opposing surfaces. The gap between their opposing surfaces refers to the small distance between the two planes facing each other. The first pulse coil 41 and the second pulse coil 42 generate an induced magnetic field and pulse force through the gap between their opposing surfaces, thereby causing the blade body 1 to produce a small amplitude and high acceleration damped vibration, causing the ice layer on the surface of the blade body 1 to peel off, shatter, and fall off, achieving the purpose of de-icing. The specific spacing value of the gap between their opposing surfaces is designed according to the actual situation.
[0037] For example, the first pulse coil 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 first pulse coil 41 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 prerequisite that the first pulse coil 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 first pulse coil 41 and the pulse coil 42 can be flexibly selected according to the actual situation, so as to ensure that the first pulse coil 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, such as Figure 2-a , Figure 2-b and Figure 3 As shown, both the first pulse coil 41 and the second pulse coil 42 are helical loop coils with opposite winding directions. The winding method of the helical loop coil can be a flat winding (see reference). Figure 2-a ) or vertical winding type (refer to) Figure 2-bBoth 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 opposite winding directions of the coils can generate mutually repulsive electromagnetic forces after the first pulse coil 41 and the second pulse coil 42 are energized. The first pulse coil 41 and the second pulse coil 42 are thin sheet-like structures that fit in close to the blade body 1, 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 first pulse coil 41 and the second pulse coil 42 and the number of coil turns are comprehensively designed according to the size of the wind turbine blade and the de-icing power requirements.
[0039] Furthermore, in any pulse de-icing unit 4, the first pulse coil 41 and the second pulse coil 42 are first connected in series via circuit wires 5, and then connected in parallel to the pulse power supply 6. The circuit wires 5 can be integrally molded and embedded in the blade body 1, or they 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, the de-icing controller 7, and the discharge switch 8 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. 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 group of pulse de-icing units 4 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 power supply of the corresponding pulse de-icing unit 4. Both the discharge switch Q and the charging switch Q0 are made 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 turn 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, there are three branches formed by the discharge switch Q and the second pulse coil 42. In actual applications, there can be multiple branches, such as 2, 4 or 5, depending on the actual needs.
[0041] Optionally, refer again Figure 1 and Figure 4An 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 IoT 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 capacitor C1 terminal from being too low in the initial stage of charging, resulting in excessive charging current, 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, no rectifier circuit is required at the output terminal of the step-up transformer T1.
[0044] In some specific embodiments, 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 multiple pulse de-icing units 4 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 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 de-icing unit 4 constant. For example, as shown in the figure... Figure 5As shown, two adjacent pulse de-icing units 4 can be connected in series to form an adjacent group, and then multiple adjacent groups can be connected in parallel with the pulse power supply 6 to form a loop. In this case, the charging voltage of capacitor C1 needs to be doubled accordingly. For example, if any pulse de-icing unit 4 is directly connected in parallel with the pulse power supply 6, capacitor C1 needs to be charged to 500V; if two adjacent pulse de-icing units 4 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 de-icing units 4 are connected in series to form an adjacent group, capacitor C1 needs to be charged to 1500V, and so on for other cases.
[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 at a preset time interval 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 instantaneously discharges into the first pulse coil 41 and the second pulse coil 42 in the de-icing unit 4, such as... Figure 6 As shown, a rapidly formed and rapidly decaying induced magnetic field is established around the first pulse coil 41 and the second 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 first pulse coil 41 and the second pulse coil 42. The pulse force is in opposite directions. The first pulse coil 41 and the second 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] Step 8: If de-icing is required outside the preset de-icing interval or when the cabin temperature sensor detects an external temperature greater than 0°C, de-icing can be performed. The de-icing controller 7 can be switched to manual de-icing mode, and the conductive slip ring can be manually controlled to supply power to the step-up transformer T1 and the de-icing controller 7 to start the de-icing device for de-icing.
[0057] 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.
[0058] 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. A dual-coil electrical pulse de-icing device for wind turbine blades, wherein the wind turbine blade includes a blade body, and the blade body has 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 first pulse coil and a second pulse coil connected in series. The first pulse coil and the second pulse coil are fixed inside the blade body or on the cavity wall. The first pulse coil and the second pulse coil are arranged facing each other and have a gap between their opposing surfaces. The first pulse coil and the second pulse coil are wound in opposite directions.
2. The wind turbine blade dual-coil electrical 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. The wind turbine blade dual-coil electrical pulse de-icing device according to claim 2, characterized in that, Furthermore, the center lines of the first pulse coil and the second pulse coil coincide, and both the first pulse coil and the second pulse coil are thin sheet-like structures that are attached to the wind turbine blades.
4. The wind turbine blade dual-coil electric pulse de-icing device according to claim 2, characterized in that, Both the first pulse coil and the second pulse coil are spiral loop coils.
5. The wind turbine blade dual-coil electric 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. A dual-coil electric pulse de-icing device for wind turbine blades 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. A dual-coil electric pulse de-icing device for wind turbine blades according to claim 6, characterized in that, Multiple sets of the 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. A dual-coil electric pulse de-icing device for wind turbine blades according to claim 7, characterized in that, A discharge switch is provided between the pulse de-icing unit and the pulse power supply.
9. A dual-coil electric pulse de-icing device for wind turbine blades 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. A dual-coil electric pulse de-icing device for wind turbine blades 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.
Citation Information
Patent Citations
Wind turbine generator blade deicing device and deicing method based on electric pulse
CN114233583A