Test method and test platform for air-heat deicing system of fan blade

Abstract

The invention relates to the field of wind power generation, and discloses a test method and a test platform of a fan blade gas heat deicing system. The test method comprises the following steps: preparation work: assembling a fan blade and a gas-heat deicing device and placing the fan blade and the gas-heat deicing device on a supporting platform; the gas heat deicing device is connected with a deicing control system; the deicing control system is connected with a power supply; the power supply test is used for testing a connection loop of the gas heat deicing device, the deicing control system and the power supply; function testing: testing control logics of the deicing control system in a manual mode, a forced mode and an automatic mode; and performance testing: testing the performance index of the gas heat deicing device. The performance and reliability of the fan blade gas-heat deicing system are comprehensively evaluated and verified through the power supply test, the function test and the performance test, so that the evaluation and verification problem of the fan blade gas-heat deicing system is solved, and the standard and reliable effects are achieved.

Description

Technical Field

[0001] The present application belongs to the field of wind power generation, and specifically relates to a testing method and a testing platform for a wind turbine blade air-heat deicing system. Background Art

[0002] Faced with the demand for large loads in the power grid, considering the value of wind power as an alternative energy source and the value of reducing environmental pollution, wind power has become the most competitive power supply product. However, wind farms are generally located in high-altitude areas with strong winds and cold weather, and it is very easy for wind turbine blades to freeze in winter. When wind turbine blades freeze, the airfoil lift will be reduced, the drag will be increased, the blade torque will decrease, and the power generation efficiency of the wind turbine will be affected. At the same time, the increase in ice on the wind turbine blades will lead to an unbalanced mass distribution, asymmetric loads, and mechanical failures of wind turbines, which will cause equipment shutdown in severe cases. The unplanned shutdown of wind turbines brings huge risks to the dispatching and operation of the power system, and seriously affects the safe and stable operation of the power grid. Therefore, the icing of wind turbine blades has become an important disaster factor affecting the transmission of wind power and the reliable power supply of the power grid in winter. Carrying out wind turbine blade deicing can effectively improve the grid-connected power generation capacity and reliability of wind power in winter, which is of great significance.

[0003] In the prior art, common fan blade gas thermal deicing systems include a gas thermal deicing device and a deicing control system, but lack a set of standardized and reliable testing methods and testing platforms to test whether the fan blade gas thermal deicing system meets the deicing performance requirements and verify whether the fan blade gas thermal deicing system can be started and stopped normally according to the control logic. As a result, it is impossible to effectively evaluate the performance of the fan blade gas thermal deicing system when the wind turbine leaves the factory. Summary of the invention

[0004] The purpose of this application is to provide a test method and test platform for a fan blade air-heat deicing system, which are used to solve the evaluation and verification problems of the fan blade air-heat deicing system and achieve standardized and reliable results.

[0005] In order to achieve the above-mentioned object, the present application provides, on one hand, a method for testing a fan blade air-heat deicing system, comprising the following steps:

[0006] Preparatory work: assemble the fan blades and the air-heat deicing device and place them on the support platform; connect the air-heat deicing device to the deicing control system; connect the deicing control system to the power supply;

[0007] Power supply test, testing the connection circuit between the gas-heat deicing device, the deicing control system and the power supply;

[0008] Functional testing, testing the control logic of the de-icing control system in manual mode, forced mode and automatic mode;

[0009] Performance test, testing the performance indicators of the gas thermal deicing device.

[0010] In some embodiments, the gas-heat deicing device includes a base and a blower and a heater mounted on the base; an air duct is provided inside the blower blades; the gas is sucked in by the blower, heated by the heater to form hot air, and then enters the air duct to heat the blower blades.

[0011] In some embodiments, the de-icing control system includes a tower base control cabinet, a cabin control cabinet, a power distribution box, a blade root control cabinet, and a blade root power cabinet; the power supply includes a 690V power supply and a 230V power supply;

[0012] The 690V power supply, the tower base control cabinet, the cabin control cabinet, the power distribution box, the blade root power cabinet and the gas-heat deicing device are sequentially connected to form a 690V circuit;

[0013] The 230V power supply, the tower base control cabinet, the cabin control cabinet, the power distribution box, the blade root control cabinet and the blade root power cabinet are connected in sequence to form a 230V circuit.

[0014] In some implementations, the power supply test specifically includes:

[0015] Using a multimeter to measure the line voltage and line phase sequence of the tower base control cabinet;

[0016] Close the switch of the tower base control cabinet and measure the line voltage of the cabin control cabinet with a multimeter;

[0017] Close the switch of the cabin control cabinet and measure the line voltage of the blade root control cabinet with a multimeter;

[0018] Close the switch of the blade root control cabinet and measure the line voltage of the blade root power cabinet with a multimeter;

[0019] Close the switch of the blade root power cabinet to confirm that the gas-heat deicing device is started.

[0020] In some embodiments, the de-icing control system includes an operation interface, a host computer, a cabin control cabinet, a blade root control cabinet, a blade root power cabinet and a sensor which are sequentially connected to form a control loop; the sensor is used to obtain the temperature of the fan blade.

[0021] In some embodiments, the functional test specifically includes:

[0022] Switching to manual mode in the operation interface;

[0023] Click the start / stop button of the blower to confirm that the blower starts, and the corresponding indicator light turns on. Release the button to stop the blower.

[0024] Click the start / stop button of the heater to confirm that the heater is started, and the corresponding indicator light is on. Release the button to stop the heater.

[0025] Switching to the forced mode in the operation interface;

[0026] After confirming that the blower is started, the heater is started with a delay, and the heater periodically continues heating for a preset time and then turns off;

[0027] After confirming that the blower is turned off, the heater is automatically turned off.

[0028] In some embodiments, the functional test specifically includes:

[0029] Switching to automatic mode in the operation interface;

[0030] Use liquid nitrogen spray or a hot air gun to artificially simulate the ambient temperature changes on the fan blade surface;

[0031] Inputting the start threshold and stop threshold of the blower and the heater;

[0032] Confirm that the blower and the heater automatically start and stop as the ambient temperature changes.

[0033] In some embodiments, the preparatory work further comprises:

[0034] Conducting a visual inspection of the appearance of the gas-heat deicing device and the deicing control system;

[0035] Conducting a wiring check on the connection circuits of the gas-heat deicing device and the deicing control system;

[0036] An insulation resistance test is performed on the connection circuits of the gas-heat deicing device and the deicing control system.

[0037] In some embodiments, the performance indicators include: outlet wind pressure, outlet wind speed, and fan power of the blower, and outlet temperature and heating power of the heater.

[0038] A second aspect of the present application provides a test platform for a fan blade air-heat deicing system, which adopts the above-mentioned test method.

[0039] Compared with the prior art, the beneficial effects of the present application are as follows: the present application comprehensively evaluates and verifies the performance and reliability of the fan blade air thermal deicing system through power supply testing, functional testing and performance testing, thereby solving the evaluation and verification problems of the fan blade air thermal deicing system and achieving standardized and reliable results.

[0040] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0042] Figure 1 This is a framework diagram of a wind turbine blade air-heat deicing system according to a specific embodiment of the present application.

[0043] Figure 2 Schematic diagram of a test platform for a fan blade air-heat deicing system according to a specific embodiment of the present application.

[0044] Figure 3 This is a structural diagram of a gas-heat deicing device according to a specific embodiment of the present application.

[0045] Explanation of reference numerals: fan blade 1 , air guide duct 11 , flow guide cavity 12 , base 21 , blower 22 , heater 23 . DETAILED DESCRIPTION

[0046] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0047] like Figure 1 , Figure 2 As shown, a method for testing a fan blade air-heat deicing system comprises the following steps:

[0048] Preparatory work: assemble the fan blade 1 with the gas-heat deicing device and place them on the support platform; connect the gas-heat deicing device with the deicing control system; connect the deicing control system with the power supply;

[0049] Power supply test, testing the connection circuit between the gas-heat deicing device, deicing control system and power supply;

[0050] Functional testing, testing the control logic of the de-icing control system in manual mode, forced mode and automatic mode;

[0051] Performance test, testing the performance indicators of the gas thermal deicing device.

[0052] In the present application, after the fan blades 1, the gas-thermal deicing device and the deicing control system are connected and placed on a supporting platform in sequence, a power supply test is performed on the connection circuit, a functional test is performed on the deicing control system, and a performance test is performed on the gas-thermal deicing device; then various performance indicators of the gas-thermal deicing device are obtained to evaluate whether the deicing requirements of the fan blades 1 are met; at the same time, it is also verified whether the deicing control system starts the gas-thermal deicing device normally according to its control logic in manual mode, forced mode and automatic mode, and whether the gas-thermal deicing device is normally shut down after the set shutdown conditions are reached; then the evaluation and verification problems of the fan blade gas-thermal deicing system are solved, and standardized and reliable effects are achieved.

[0053] like Figure 2 , Figure 3 As shown, specifically, the gas-heat deicing device includes a base 21 and a blower 22 and a heater 23 installed on the base 21; an air guide duct 11 is provided inside the fan blade 1; the gas is sucked in by the blower 22, and after being heated by the heater 23 to form hot air, it enters the air guide duct 11 to heat the fan blade 1.

[0054] In some embodiments, the fan blade 1 is placed horizontally on a supporting platform. A guide cavity 12 is provided inside the fan blade 1, which connects the root of the blade to the tip of the blade. The two ends of the air guide duct 11 are respectively connected to the heater 23 and the guide cavity 12. The hot air output by the air-heat deicing device enters the guide cavity 12 through the air guide duct 11, heats the wall surface of the fan blade 1, and then achieves deicing of the fan blade 1.

[0055] In some embodiments, the blower 22 is a centrifugal blower, and the heater 23 is a PTC heater and includes a primary heater and a secondary heater with different heating powers. The inlet of the heater 23 is connected to the blower 22 through a silicone seal and a fastener. The outlet of the heater 23 is connected to the air guide duct 11 of the fan blade 1 through a bellows. The blower 22 and the heater 23 are installed on the base 21 through a bracket and fasteners. The base 21 is a push-pull base, fixed on a supporting platform, and can adjust the connection distance with the fan blade 1 to adapt to fan blades 1 of different specifications.

[0056] Specifically, the performance indicators of the air-heat deicing device include: outlet wind pressure, outlet wind speed, and fan power of the blower 22, and outlet temperature and heating power of the heater 23. The determination of the performance indicators can accurately evaluate the deicing capability and effect of the fan blades 1.

[0057] In some embodiments, the performance test includes: starting the blower 22 and the heater 23, gradually increasing their currents, and obtaining power curves of the blower 22 and the heater 23, respectively.

[0058] Specifically, the preparatory work also includes:

[0059] Conduct visual inspection of the equipment appearance of the gas-heat deicing device and deicing control system;

[0060] Check the connection circuits of the gas-heat deicing device and deicing control system;

[0061] Carry out insulation resistance test on the connection circuits of the gas-heat deicing device and the deicing control system.

[0062] In some embodiments, the visual inspection specifically includes: Checking the appearance of all equipment, which should be free of damage and deformation. Checking the metal parts of the equipment, which should be free of rust and paint peeling. Checking the screws at the connection of the equipment, which should be tightened and not loose. Checking the cabinet doors, which should be tightly closed and reliable.

[0063] Specifically, the de-icing control system includes a tower base control cabinet, a cabin control cabinet, a power distribution box, a blade root control cabinet, and a blade root power cabinet; the power supply includes a 690V power supply and a 230V power supply;

[0064] The 690V power supply, tower base control cabinet, cabin control cabinet, power distribution box, blade root power cabinet and gas-heat deicing device are connected in sequence to form a 690V circuit;

[0065] The 230V power supply, tower base control cabinet, cabin control cabinet, power distribution box, blade root control cabinet and blade root power cabinet are connected in sequence to form a 230V circuit.

[0066] Furthermore, the power supply test specifically includes:

[0067] Use a multimeter to measure the line voltage and line phase sequence of the tower base control cabinet;

[0068] Close the switch of the tower base control cabinet and use a multimeter to measure the line voltage of the cabin control cabinet;

[0069] Close the switch of the cabin control cabinet and use a multimeter to measure the line voltage of the blade root control cabinet;

[0070] Close the switch of the blade root control cabinet and use a multimeter to measure the line voltage of the blade root power cabinet;

[0071] Close the switch of the blade root power cabinet to confirm that the gas-heat de-icing device is started.

[0072] In some embodiments, the 690V circuit is connected by a heavy-duty cable. A slip ring is provided between the cabin control cabinet and the power distribution box. After closing the switch of the cabinet, check whether the indicator light corresponding to the cabinet is on.

[0073] Specifically, the de-icing control system includes an operation interface, a host computer, a cabin control cabinet, a blade root control cabinet, a blade root power cabinet and a sensor which are sequentially connected to form a control loop; the sensor is used to obtain the temperature of the fan blade 1.

[0074] In some embodiments, the cabin control cabinet and the blade root control cabinet use CAN communication. The sensors include temperature sensors and pressure sensors, which are distributed in the guide cavity 12 of the fan blade 1. The temperature of the guide cavity 12 is fed back to the blade root control cabinet through the sensor and the blade root power cabinet.

[0075] Specifically, the host computer runs the debugging program and performs functional testing on the operation interface, including:

[0076] Switch to manual mode in the operation interface;

[0077] Click the start / stop button of the blower 22 to confirm that the blower 22 starts, and the corresponding indicator light turns on. Release the button to stop the blower 22.

[0078] Click the start / stop button of heater 23 to confirm that heater 23 starts, the corresponding indicator light turns on, and it stops after releasing it;

[0079] Switch to the forced mode in the operation interface;

[0080] After confirming that the blower 22 is started, the heater 23 is started with a delay, and the heater 23 periodically continues heating for a preset time and then turns off;

[0081] After confirming that the blower 22 is turned off, the heater 23 is automatically turned off;

[0082] Switch to automatic mode in the operation interface;

[0083] Use liquid nitrogen spray or a hot air gun to artificially simulate the ambient temperature change on the surface of the fan blade 1;

[0084] Input the start threshold and stop threshold of the blower 22 and the heater 23;

[0085] Confirm that the blower 22 and the heater 23 automatically start and stop as the ambient temperature changes.

[0086] In addition, a test platform for a fan blade air-heat deicing system includes a support platform, an air-heat deicing device, a deicing control system and a power supply, and adopts the above-mentioned test method.

[0087] Example 1

[0088] This embodiment is a test record form corresponding to a test method of a wind turbine blade air-heat deicing system. In this embodiment, the deicing control system is provided with three blade root power cabinets, and the air-heat deicing device is provided with three groups, corresponding to the three wind turbine blades of the wind turbine set respectively.

[0089]

[0090]

[0091]

[0092]

[0093]

[0094]

[0095] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0096] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0097] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0098] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for testing a fan blade air-heat deicing system, characterized in that: The following steps are involved: Preparatory work: assemble the fan blades (1) and the gas-heat deicing device and place them on the support platform; Connecting the gas-heat deicing device to a deicing control system; Connecting the de-icing control system to a power supply; Power supply test, testing the connection circuit between the gas-heat deicing device, the deicing control system and the power supply; Functional testing, testing the control logic of the de-icing control system in manual mode, forced mode and automatic mode; Performance test, testing the performance indicators of the gas thermal deicing device.

2. The method for testing the fan blade air-heat deicing system according to claim 1, characterized in that: The gas-heat deicing device comprises a base (21), a blower (22) and a heater (23) mounted on the base (21); an air guide duct (11) is provided inside the blower blade (1); gas is sucked in by the blower (22), heated by the heater (23) to form hot air, and then enters the air guide duct (11) to heat the blower blade (1).

3. The method for testing a fan blade air-heat deicing system according to claim 1, characterized in that: The de-icing control system includes a tower base control cabinet, a cabin control cabinet, a power distribution box, a blade root control cabinet and a blade root power cabinet; the power supply includes a 690V power supply and a 230V power supply; The 690V power supply, the tower base control cabinet, the cabin control cabinet, the power distribution box, the blade root power cabinet and the gas-heat deicing device are sequentially connected to form a 690V circuit; The 230V power supply, the tower base control cabinet, the cabin control cabinet, the power distribution box, the blade root control cabinet and the blade root power cabinet are connected in sequence to form a 230V circuit.

4. The method for testing the fan blade air-heat deicing system according to claim 3, characterized in that: The power supply test specifically includes: Using a multimeter to measure the line voltage and line phase sequence of the tower base control cabinet; Close the switch of the tower base control cabinet and measure the line voltage of the cabin control cabinet with a multimeter; Close the switch of the cabin control cabinet and measure the line voltage of the blade root control cabinet with a multimeter; Close the switch of the blade root control cabinet and measure the line voltage of the blade root power cabinet with a multimeter; Close the switch of the blade root power cabinet to confirm that the gas-heat deicing device is started.

5. The method for testing a fan blade air-heat deicing system according to claim 2, characterized in that: The de-icing control system comprises an operation interface, a host computer, a cabin control cabinet, a blade root control cabinet, a blade root power cabinet and a sensor which are sequentially connected to form a control loop; the sensor is used to obtain the temperature of the fan blade (1).

6. The method for testing the fan blade air-heat deicing system according to claim 5, characterized in that: The functional test specifically includes: Switching to manual mode in the operation interface; Click the start / stop button of the blower (22) to confirm that the blower (22) starts, and the corresponding indicator light is lit, and the blower stops after releasing the button; Click the start / stop button of the heater (23) to confirm that the heater (23) is started, and the corresponding indicator light is lit, and the heater stops after releasing the button; Switching to the forced mode in the operation interface; After confirming that the blower (22) is started, the heater (23) is started with a delay, and the heater (23) periodically continues heating for a preset time and then turns off; After confirming that the blower (22) is turned off, the heater (23) is automatically turned off.

7. The method for testing a fan blade air-heat deicing system according to claim 5, characterized in that: The functional test specifically includes: Switching to automatic mode in the operation interface; Using liquid nitrogen spray or a hot air gun to artificially simulate the ambient temperature change on the surface of the fan blade (1); Inputting the start threshold and stop threshold of the blower (22) and the heater (23); Confirm that the blower (22) and the heater (23) automatically start and stop as the ambient temperature changes.

8. The method for testing a fan blade air-heat deicing system according to claim 1, characterized in that: The preparatory work also includes: Conducting a visual inspection of the appearance of the gas-heat deicing device and the deicing control system; Conducting a wiring check on the connection circuits of the gas-heat deicing device and the deicing control system; An insulation resistance test is performed on the connection circuits of the gas-heat deicing device and the deicing control system.

9. The method for testing a fan blade air-heat deicing system according to claim 2, characterized in that: The performance indicators include: outlet wind pressure, outlet wind speed, and fan power of the blower (22), and outlet temperature and heating power of the heater (23).

10. A test platform for a fan blade air-heat deicing system, characterized in that: The test method according to any one of claims 1 to 9 is adopted.

Images