Performance testing method for a pneumatic thermal ice removal device of a wind turbine blade

Abstract

The present invention discloses a performance testing method for a pneumatic thermal ice removal device of a wind turbine blade. The testing system adopted includes a testing platform, a power supply system, a measurement system, and a main control system. The testing platform includes a platform base, a mounting bracket, a rotary drive, and a slip ring. The rotary drive is installed at the center of the platform base. The central hole of the mounting bracket is sleeved outside the rotary drive. The rotor of the slip ring is connected to the rotary drive, and the stator is connected to the mounting bracket. The testing platform can simulate parameters such as the outlet wind pressure, wind speed, wind temperature, and power of the ice removal device during operation under different blade permeability conditions to test whether the ice removal device meets the requirements of blade ice removal. It can test the various control functions of the control system of the pneumatic thermal ice removal device and the accuracy of the control logic. It can test the running stability of the slip ring. It can test the running conditions, mechanical strength, and assembly firmness of the ice removal device and its control system at different rotational speeds. The main control system can realize functions such as setting of operating parameters and measurement of operating parameters.

Description

Technical Field

[0001] The present invention belongs to the field of electrical engineering, and particularly relates to a performance testing method for a gas-heated de-icing device of a wind turbine blade. Background Art

[0002] Wind farms are mostly located in high-altitude areas with micro-meteorological and micro-topographical conditions. In winter, the climate is humid, and there are frequent freezing rain, rime and other weather conditions. Wind turbines generally have the problem of icing in winter. When operating under cold climate conditions, the wind turbine blades are prone to icing. The icing of the wind turbine blades not only affects the normal power generation of the wind turbine, but also affects the safety of the wind turbine itself. Gas-heated de-icing is one of the effective solutions to solve the icing of wind turbine blades. At present, this technology has been widely applied. However, for the factory testing of the performance of gas-heated de-icing devices, there is no set of standardized and effective testing methods, and it is impossible to evaluate the overall performance of gas-heated de-icing devices during factory testing. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for evaluating and testing the overall performance of a gas-heated de-icing device for wind turbine blades, so as to ensure the normal use of the gas-heated de-icing device after on-site installation.

[0004] The performance testing method for the gas-heated de-icing device of the wind turbine blade provided by the present invention adopts a testing system including a testing platform, a power supply system, a measurement system and a main control system; the testing platform includes a platform base, a mounting bracket, a rotary drive and a slip ring. The rotary drive is installed at the center of the platform base. The central hole of the mounting bracket is sleeved outside the rotary drive. The rotor of the slip ring is connected to the rotary drive, and the stator is connected to the mounting bracket;

[0005] The specific testing steps are as follows:

[0006] (1) Install a wind pipe with a regulating valve at the air outlet of the heater of the gas-heated de-icing device to be tested;

[0007] (2) Fix the heater of the gas-heated de-icing device to the mounting bracket detachably, and keep the regulating valve on the wind pipe in the fully open state;

[0008] (3) Fix the nacelle cabinet supporting the gas-heated de-icing device to the mounting bracket detachably;

[0009] (4) Set up a safety enclosure around the testing platform;

[0010] (5) Install the power supply system, the control system cabinet of the gas-heated de-icing device and the main control system cabinet on the safety enclosure respectively;

[0011] (6) Make electrical connections between each electrical equipment and the power supply system;

[0012] (7) Turn on the power supply and observe whether each electrical equipment is powered on normally through the main control system;

[0013] (8) Set the test parameters in the main control system. After starting the main control system and waiting for each device to run stably, record the operating parameters of the fan of the air-heating de-icing device through the measurement system, observe whether the temperature curve of the nacelle cabinet is continuously stable, and test whether the functions of the control system of the air-heating de-icing device are normal;

[0014] (9) After a set of test parameters are tested, stop the rotary drive and wait for the test platform to be stationary. Then adjust the opening degree of the regulating valve on the air duct to simulate the working state of the fan under different blade permeabilities, and repeat the test in step (8);

[0015] (10) After repeating steps (8) and (9) multiple times, make the test platform stationary, disconnect the power supply and electrical connections, check whether the appearance and mechanical connections of the air-heating de-icing device are intact, and analyze the test data.

[0016] In the above method, the lower ends of the four support feet of the platform base are respectively connected with screw adjusting components, and the leveling of the platform base can be realized through each screw adjusting component.

[0017] In the above method, the power supply system is set with two voltage levels of AC 690V and 220V, which are used to supply power to the air-heating de-icing device and other electrical equipment respectively.

[0018] In the above method, the test parameters include the operating parameters of the heater, fan and control system cabinet of the air-heating de-icing device.

[0019] In the above method, the opening degree of the regulating valve is set to 100%, 50% and 20%.

[0020] In the above method, the speed adjustment range of the rotary drive is 10 - 30 r / min.

[0021] In the above method, the parameter test of the fan includes outlet air pressure, air speed and fan power, and the parameter test of the heater includes outlet air pressure, outlet air speed, outlet temperature and heating power.

[0022] The test system of the present invention can simultaneously test the performance of multiple sets of pneumatic thermal de-icing devices through a test platform. Specifically, it can simulate parameters such as the outlet wind pressure, wind speed, wind temperature, and power of the de-icing device under different blade permeability conditions to verify whether the de-icing device meets the requirements for blade de-icing; it can test various control functions and the accuracy of the control logic of the control system of the pneumatic thermal de-icing device; it can test the customized slip rings for de-icing to verify the operating stability of the slip rings. It can test the operating conditions, mechanical strength, and assembly firmness of the de-icing device and its control system at different rotational speeds. The test platform can achieve functions such as setting operating parameters and measuring operating parameters through the main control system. That is, the performance of the pneumatic thermal de-icing device can be tested in the factory through the present invention, and problems can be detected and processed before leaving the factory to ensure the normal use of the pneumatic thermal de-icing device after on-site installation and ensure the de-icing effect of the fan blades of the wind turbine. In short, the present invention is mainly used for testing the operating parameters of the pneumatic thermal de-icing device of the fan blade, and can carry out the testing of the operating parameters of the heater, blower, and control cabinet to verify the operating parameters such as wind speed, wind pressure, and temperature rise speed of the de-icing system under different permeable blade conditions, and can further evaluate whether the pneumatic thermal de-icing device can meet the requirements for blade de-icing. The present invention can also verify whether the functions and operating logic of the pneumatic thermal de-icing control system are correct, the stability of the de-icing slip ring, and the firm strength of each component under rotational conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the use state of an embodiment of the present invention.

[0024] Figure 2 It is an enlarged structural schematic diagram of the test platform in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will describe the embodiments of the present invention in detail with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0026] The test system for the pneumatic thermal de-icing device of the fan blade of the wind turbine disclosed in this embodiment includes a test platform, a power supply system, a measurement system, and a main control system. The test platform includes a platform base 1, a mounting bracket 2, a rotary drive 3, and a slip ring 4.

[0027] The lower ends of the four support feet of the platform base 1 are respectively connected to screw adjustment components, and the platform base can be leveled through each screw adjustment component.

[0028] The mounting bracket 2 includes a rectangular plate 21 and three mounting plates 22 evenly distributed around the central hole of the rectangular plate.

[0029] The rotary drive 3 is installed at the central position of the platform base 1, and the rectangular plate 21 of the mounting bracket 2 is horizontally sleeved outside the rotating shaft of the rotary drive 3 and is fixedly connected to the rotary support of the rotary drive.

[0030] The rotor of the slip ring 4 is coaxially connected to the rotating shaft of the rotary drive 3, and the stator is fixedly connected to the rectangular plate 21 of the mounting bracket 2.

[0031] The air heaters 51 of the three sets of air-heated de-icing devices 5 are first installed with air ducts 6 with regulating valves and then detachably fixed to the mounting plate of the mounting bracket by bolts. The regulating valves are not shown in the figure.

[0032] Three engine room cabinets are detachably installed on the rectangular plate of the mounting bracket between the corresponding adjacent air-heated de-icing devices. The engine room cabinets are not shown in the figure.

[0033] A safety fence is set around the platform base of the test platform, and a power system cabinet and a control cabinet of the air-heated de-icing device are fixed on the safety fence, and a main control cabinet is also fixed on the safety fence. The safety fence is not shown.

[0034] The power system is used to supply power to the platform and test equipment, and includes two voltage levels of AC 690V and 220V.

[0035] The rotary drive mainly realizes the rotation simulation of the air-heated de-icing device after installation. The slip ring at the rotation center is mainly used to transmit electric energy and data communication to the rotating part. The air duct at the outlet of the heater of the air-heated de-icing device is used to simulate the air supply duct in actual operation. The valve set on the air duct can adjust the opening degree to simulate the fan working state of the air-heated de-icing device under different blade permeabilities.

[0036] The operating parameters of the fan 52 of the air-heated de-icing device 5 mainly include the outlet air pressure, air velocity and the power of the fan. The operating parameters of the heater mainly include the outlet air pressure, air velocity, temperature and heating power.

[0037] The above operating parameters are obtained through the measurement system.

[0038] The specific test steps are as follows:

[0039] Step 1: Check whether the platform power is in the off state and check the coaxiality of the slip ring and the rotating shaft of the rotary drive;

[0040] Step 2: Complete the electrical connection of the cables. The connection sequence is engine room cabinet - platform main control cabinet - slip ring - power distribution box - control cabinet of the air-heated de-icing device - fan of the air-heated de-icing device. Complete the wiring of the sensors and the data acquisition module. After the cables enter the rotating platform, they need to be connected and tied firmly to prevent loosening and kinking during rotation;

[0041] Step 3: After checking that the wiring is correct, turn on the power and observe whether the system is normal;

[0042] Step 4: Before starting the rotating platform, ensure that all personnel have been evacuated outside the safety fence. After setting the test parameters, press the startup button of the main control unit. After the equipment runs stably, record the operating parameters such as the outlet temperature, wind speed, wind pressure, and power of the hot air blower, observe whether the temperature data curve of the nacelle cabinet is continuous and stable, and test whether the control functions of the control system are normal.

[0043] Step 5: After completing the test under a set of parameters, stop the rotating platform and wait for it to come to a standstill. Then adjust the opening conditions (100%, 50%, 20%) of the air duct baffle to simulate the working state of the hot air blower under different blade permeabilities, and repeat the test in Step 5; the test parameters are mainly as shown in the following table.

[0044]

[0045]

[0046] Step 7: After the test is completed, shut down the machine. After the platform comes to a stable standstill, disconnect the platform power supply, remove the electrical wiring and equipment in sequence, and check whether the appearance of the device and the mechanical connection are intact.

[0047] Generally speaking, the above test system has the following functions:

[0048] (1) It can simulate the parameters such as the outlet wind pressure, wind speed, wind temperature, and power of the ice removal device under different blade permeability conditions (100%, 50%, 20%) to test whether the ice removal device meets the requirements of blade de-icing.

[0049] (2) It can test the ice removal control system of the fan blade to test the accuracy of various control functions and control logics.

[0050] (3) It can test the customized slip ring for ice removal and check the running stability of the slip ring according to the signal curve.

[0051] (4) It can test the operating conditions, mechanical strength, and assembly firmness of the ice removal device and the control system at different rotational speeds (10 - 30 r / min).

[0052] (5) The platform can realize functions such as setting operating parameters and measuring operating parameters through the touch screen of the main control cabinet.

[0053] Briefly, the present invention is mainly used for testing the operating parameters of the air-heating de-icing device for fan blades, and can carry out the testing of the operating parameters of heaters, blowers and control cabinets to test the operating parameters such as wind speed, wind pressure and temperature rise rate of the de-icing system under different permeable blade conditions, and can further evaluate whether the air-heating de-icing device can meet the requirements of blade de-icing. The present invention can also test whether the functions and operating logics of the air-heating de-icing control system are correct, the stability of the de-icing slip ring, and the firm strength of each component under rotating conditions. By testing the performance of the air-heating de-icing device in the factory with the present invention, problems can be discovered and processed before leaving the factory to ensure the normal use of the air-heating de-icing device after on-site installation and ensure the de-icing effect of the fan blades of the wind turbine generator.

[0054] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A performance test method for a pneumatic thermal ice removal device of a wind turbine blade, characterized in that the test system adopted by this method includes a test platform, a power supply system, a measurement system and a main control system; the test platform includes a platform base, a mounting bracket, a rotary drive and a slip ring. The rotary drive is installed at the center of the platform base. The central hole of the mounting bracket is sleeved outside the rotary drive. The rotor of the slip ring is connected to the rotary drive, and the stator is connected to the mounting bracket; The specific test steps are as follows: (1) Install a wind pipe with a regulating valve at the air outlet of the heater of the pneumatic thermal ice removal device to be tested; (2) Detachably fix the heater of the pneumatic thermal ice removal device on the mounting bracket, and keep the regulating valve on the wind pipe in the fully open state; (3) Detachably fix the nacelle cabinet supporting the pneumatic thermal ice removal device on the mounting bracket; (4) Set up a safety enclosure around the test platform; (5) Install the power supply system, the control system cabinet and the main control system cabinet of the pneumatic thermal ice removal device on the safety enclosure respectively; (6) Make electrical connections between each electrical equipment and the power supply system; (7) Turn on the power supply, and observe whether each electrical equipment is powered on normally through the main control system; (8) Set test parameters in the main control system. After starting the main control system and waiting for each device to run stably, record the operating parameters of the fan of the pneumatic thermal ice removal device through the measurement system, observe whether the temperature curve of the nacelle cabinet is continuously stable, and test whether the functions of the control system of the pneumatic thermal ice removal device are normal; (9) After a set of test parameters are tested, stop the rotary drive and wait for the test platform to be stationary. Then adjust the opening of the regulating valve on the wind pipe to simulate the working state of the fan under different blade permeabilities, and repeat the test in step (8); (10) After repeating steps (8) and (9) multiple times, make the test platform stationary, disconnect the power supply and electrical connections, check whether the appearance and mechanical connections of the pneumatic thermal ice removal device are intact, and analyze the test data.

2. The method according to claim 1, wherein: The lower ends of the four support feet of the platform base are respectively connected with screw adjusting components, and the platform base can be leveled through each screw adjusting component.

3. The method according to claim 1, characterized in that: The power supply system is set with two voltage levels of AC 690V and 220V, which are used to supply power to the pneumatic thermal ice removal device and other electrical equipment respectively.

4. The method according to claim 1, wherein: The test parameters include the operating parameters of the heater, the fan and the control system cabinet of the pneumatic thermal ice removal device.

5. The method according to claim 1, characterized in that: The opening of the regulating valve is set to 100%, 50% and 20%.

6. The method according to claim 1, wherein: The speed regulation range of the rotary drive is 10 - 30 r / min.

7. The method according to claim 4, characterized in that: The test parameters of the fan include outlet air pressure, air speed and fan power. The test parameters of the heater include outlet air pressure, outlet air speed, outlet temperature and heating power.

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