CN103967720B - Automatic calibration device for cable twisting sensor of yaw system of wind generating set - Google Patents
Automatic calibration device for cable twisting sensor of yaw system of wind generating set Download PDFInfo
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Abstract
The invention discloses an automatic calibration device for a twisted cable sensor of a yaw system of a wind generating set; when the wind generating set detects that the wind direction changes and a yaw program needs to be started, the master control PLC sends an instruction to the yaw motor, the yaw motor drives the yaw speed reducer to rotate clockwise or anticlockwise, the yaw speed reducer gear drives the yaw gear disc to rotate after the speed of the speed reducer is reduced, and the wind generating set cabin is arranged on the rack taking the yaw gear disc as the center of gravity, so that the wind generating set cabin and the impeller are driven to rotate in the horizontal direction through the rotation of the yaw gear disc, and the wind alignment of the wind generating set is realized. According to the automatic calibration device for the twisted cable protection, calibration of twisted cable protection devices of various types can be completed without entering a wind generating set, the calibration precision is high, the time consumption is greatly shortened, and the reliability and the production efficiency of a yaw system of the wind generating set are improved.
Description
Technical Field
The invention relates to the technical field of wind driven generators, in particular to an automatic calibration device for a twisted cable sensor of a yaw system of a wind driven generator set.
Background
The wind generating set needs to track the wind direction change to continuously aim at the wind to obtain the maximum power during the operation, and the grid-connected wind generating set generally adopts an electric yaw system to adjust a wind wheel and enable the wind wheel to be aligned with the wind direction. The yaw system generally comprises a wind vane for sensing wind direction, a yaw motor, a yaw planetary gear reducer, a revolving body gear wheel and the like.
In actual work, because the angle transformation ratio of the cable twisting protection device is large, generally, the limiting cam is manually adjusted to rotate by 1 degree and correspondingly rotate by about 50 degrees in an actual cabin, so that the method is easily influenced by human factors to cause large errors, and if the set value is small, cable twisting protection triggering is easily caused before the control system automatically unwinds the cable, so that the fan stops running; if the set value is larger, the cable twisting protection is refused to be operated under the condition of automatic cable untwisting failure, and the damage to the cable is aggravated. The device can fill the gap that an electronic device specially used for verifying a yaw system cable twisting protection device is not available in the prior art of wind power generation. The fixed value calibration of the yaw cable twisting sensor can be carried out by a wind power plant field maintenance department or a wind power generating set complete machine manufacturer by using the calibration device, the sensor is directly installed at the corresponding position of the wind power generating set with the cable returned to the zero position after the calibration is finished, the calibration process is simple and easy to operate, the time is short, the precision is high, the existing defects of the cable twisting protection device can be overcome, the reliability and the safety of a yaw system are greatly improved, and the economic benefit of a wind power plant is improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an automatic calibration device for a twisted cable sensor of a yaw system of a wind generating set, which is used for providing accurate calibration for the twisted cable sensor which is in fault or is not calibrated. The calibration process comprises a fixed value setting process and a customized calibration process, and after the fixed value setting process and the customized calibration process are carried out, the qualified twisted cable sensor can be quickly installed in the wind generating set to replace the twisted cable sensor which has a fault, so that the labor cost and the electric quantity loss of the wind generating set are greatly reduced.
The utility model provides a wind generating set driftage system twists reverse cable sensor automatic check-up device, after wind generating set detected the wind direction change and need start the driftage procedure, master control PLC sends the instruction to yaw motor, yaw motor drive driftage speed reducer is clockwise or anticlockwise rotatory, it is rotatory to drive the driftage gear disc through the yaw speed reducer gear drive behind the speed reducer deceleration, because the wind generating set cabin is installed in the frame that uses the driftage gear disc as the focus, so the rotation of driftage gear disc has just driven the horizontal direction rotation of wind generating set cabin and impeller, thereby realize wind generating set's to wind. The cable twisting sensor gear disc is arranged beside the yaw gear disc and is meshed with a gear of the yaw gear disc, so that the rotation of the yaw gear disc is transmitted to the cable twisting sensor gear disc; when the yaw gear disc drives the cable twisting sensor gear disc to rotate, the rotation direction and the rotation angle of the yaw gear disc are finally transmitted to the transmission shaft of the cable twisting sensor and finally reflected in the travel switch of the cable twisting sensor. At least two groups of stroke nodes are attached to the stroke switch of the cable twisting sensor and are respectively used for clockwise cable twisting triggering limit and anticlockwise cable twisting triggering limit. When twisting cable sensor and installing on operation wind generating set and be used for realizing twisting cable protect function, the clockwise or anticlockwise cable distortion of fan reaches the limit value, twists cable protection and can trigger and cause wind generating set to stop the operation.
An automatic calibration device for a cable twisting sensor of a yaw system of a wind generating set comprises a wiring terminal block, a stepping motor, a control computer board, a gear disc, a driver, a display screen, a power supply module, a clockwise cable twisting operation indicator lamp and a yaw direction change-over switch, wherein the gear disc above the cable twisting sensor is meshed with the gear disc of the stepping motor in the calibration device; the control computer board is used for receiving the parameters and the control information, generating a control signal and inputting the control signal into the stepping motor driver, and simultaneously displaying the real-time parameters on the display screen; the power module is used for converting an input 220V voltage into a 24V direct-current voltage and respectively supplying power to a driver of the stepping motor, the control computer board and the display screen, the driver of the stepping motor is an actuating mechanism for converting electric pulses sent by the control computer board into angular displacement, and when the 220V power supply is switched on, the power indicator lamp is turned on after the power module works normally to prompt that the calibration device can work normally; the driver is provided with a set calibration mode and a rotating speed switch, the rotating speed can be selected step by step from 400 to 25000 steps/rotation, and unidirectional calibration can be completed within 2 minutes for a common twisted cable sensor with the speed of 1: 250; after the cable twisting sensor is installed in the calibrator, a travel switch contact leading-out wire of the cable twisting sensor needs to be connected to a wiring terminal row; when the driver receives a pulse signal, it drives the step motor to rotate a fixed angle in the set direction, and the rotation of the step motor runs in one step at the fixed angle, and controls the angular displacement by controlling the number of pulses, so as to achieve the purpose of accurate positioning, and simultaneously the pulse frequency controls the rotating speed and acceleration of the motor, thereby achieving speed regulation and positioning.
When the checking device is used for checking, firstly, cable twisting limit setting needs to be carried out, parameters such as a setting mode, a cable twisting sensor transformation ratio, the number of teeth of a yaw gear disc, clockwise and anticlockwise cable twisting trigger limits are selected through keys, the angle of rotation of the stepping motor under clockwise and anticlockwise operation can be automatically calculated by the control computer board after the determination, and a zero return button is pressed. Switch yaw direction change over switch as required, select required direction of rotation if clockwise, press the start button, calibration equipment can carry out clockwise rotation automatically, and clockwise cable operation pilot lamp of turning round also can light. The stepping motor can automatically stop and brake, and the twisted cable sensor can be accurately stopped at the set angle. At the moment, the clockwise travel switch of the cable twisting sensor needs to be manually set, firstly, the travel switch locking device is loosened, the clockwise travel switch adjusting bolt is slowly rotated until a click sound is heard, the clockwise cable twisting triggering indicator lamp is lightened, and the locking device is screwed down after the clockwise cable twisting travel switch is set. According to the steps, the yaw direction change-over switch is switched to the anticlockwise mode, and the anticlockwise twisted cable travel switch can be set.
After the cable twisting limit value is set, the fixed value of the cable twisting sensor needs to be checked, a check mode is selected through a key, and a zero return button is pressed down to ensure that the yaw angle stored in the control computer board is adjusted to be zero. Switch yaw direction change over switch as required, select required direction of rotation if clockwise, press the start button, calibration equipment can carry out clockwise rotation automatically, and clockwise cable operation pilot lamp of turning round also can light. At the moment, the cable twisting calibrator can always send a rotation instruction until the cable twisting sensor is triggered by the clockwise cable twisting travel switch, and the lamp is lighted. At the moment, the clockwise cable twisting operation indicator lamp is turned off, the stepping motor can stop and brake, and the cable twisting sensor is guaranteed to accurately stop at the current angle. The control computer board compares the current cable twisting angle with the set angle of the clockwise cable twisting, and if the error is within the input allowable deviation range, the verification is successful; if the error is larger than the input allowable deviation range, the verification fails, and the verification is prompted to be carried out again according to the set mode of the calibrator. If the counter-clockwise cable twisting triggering verification is carried out, the steps are the same as the above steps, and the yaw direction change-over switch is switched to the counter-clockwise mode when the yaw direction is selected.
After the clockwise and anticlockwise triggering of the cable twisting sensor is finished and the calibration is in accordance with the standard, the cable twisting sensor needs to be returned to a zero position, and the calibration and declaration of the cable twisting sensor are completed. The cable twisting sensor is carefully disassembled and installed on the wind generating set with the cable returning to the zero position, and the wind generating set can be put into normal operation without field verification.
The automatic calibration device can complete the calibration of the twisted cable protection devices of various types without entering the wind generating set, has high calibration precision, greatly shortens the time consumption, and improves the reliability and the production efficiency of the yaw system of the wind generating set.
Drawings
FIG. 1 is a schematic view of the yaw operation of the present invention.
Fig. 2 is a schematic structural diagram of the twisted cable sensor of the present invention.
Fig. 3 is a layout diagram of the twisted cable tester of the present invention.
Fig. 4 is a schematic structural diagram of a twisted cable sensor panel according to the present invention.
FIG. 5 is a flow chart of the verification mode of the present invention.
FIG. 6 is a flow chart of a setup mode of the present invention.
Detailed description of the preferred embodiments
The invention is further elucidated with reference to the description of the drawings.
An automatic calibration device for a cable twisting sensor of a yaw system of a wind generating set is characterized in that the driving process of the yaw system is as shown in figure 1: when the wind generating set detects that the wind direction changes and a yaw program needs to be started, the master control PLC sends an instruction to the yaw motor, the yaw motor drives the yaw speed reducer to rotate clockwise or anticlockwise, the yaw speed reducer drives the gear wheel 2 of the yaw speed reducer to drive the gear wheel disc 1 to rotate after the speed of the speed reducer is reduced, and the cabin of the wind generating set is arranged on the rack which takes the gear wheel disc 1 of the yaw speed reducer as the center of gravity, so that the cabin and the impeller of the wind generating set are driven to rotate in the horizontal direction by the rotation of the gear wheel disc 1 of the yaw speed reducer, and the wind alignment of the wind generating set is realized. The cable twisting sensor gear plate 3 is installed beside the yaw gear plate 1 and engaged with the gears of the yaw gear plate 1, so that the rotation of the yaw gear plate 1 is transmitted to the cable twisting sensor gear plate 3. When the yaw gear disc 1 in fig. 1 drives the twisted cable sensor gear disc 3 to rotate, the rotation direction and the rotation angle of the yaw gear disc are finally transmitted to the twisted cable sensor transmission shaft 4 and finally reacted in the twisted cable sensor travel switch 5. At least two groups of stroke nodes are attached to the stroke switch 5 of the cable twisting sensor, and are respectively used for clockwise cable twisting triggering limit and anticlockwise cable twisting triggering limit. When twisting cable sensor and installing on operation wind generating set and be used for realizing twisting cable protect function, the clockwise or anticlockwise cable distortion of fan reaches the limit value, twists cable protection and can trigger and cause wind generating set to stop the operation.
The internal structure of the verification device is shown in fig. 3. The torsion cable sensor 7 to be verified is arranged at the corresponding position of the calibrator, and the gear disc above the torsion cable sensor is meshed with the gear disc of the stepping motor 6. The control computer board 8 is installed inside the cable twisting sensor calibrator and used for receiving parameter setting and control information, generating a control signal and inputting the control signal into the stepping motor driver 10, and simultaneously displaying real-time parameters on the display screen 12 in fig. 4. The power module 9 is used for converting the input 220V voltage into 24V dc voltage, which is used for driving the stepping motor driver 10 and supplying power to the display 12 of the control computer board 8 and other devices. The stepping motor driver 10 is an actuator for converting an electric pulse from the control computer board 8 into an angular displacement. When the step driver 10 receives a pulse signal, it drives the step motor 6 to rotate by a fixed angle in a set direction, and the rotation thereof is performed step by step at the fixed angle. The angular displacement can be controlled by controlling the number of pulses, so that the aim of accurate positioning is fulfilled; meanwhile, the rotating speed and the rotating acceleration of the motor can be controlled by controlling the pulse frequency, so that the purposes of speed regulation and positioning are achieved. The stepping motor driver 10 is provided with a plurality of setting switches, a driving mode and a rotating speed can be selected according to requirements, the rotating speed can be selected step by step from 400 to 25000 steps/rotation, and for a common 1:250 twisted cable sensor, unidirectional verification can be completed within 2 minutes by selecting a proper rotating speed. The terminal block 11 can be used for wiring inside the calibrator, and when the twisted cable sensor 7 is installed inside the calibrator, the travel switch contact leading-out wire needs to be connected to the terminal block 11. Fig. 4 is a diagram of a twisted cable sensor panel, which is composed of a display screen 12, keys 13, and a part of buttons, a switch and an indicator light 14 to 22. Wherein, the display screen 12 can display parameters such as cable twisting angle, time and the like, and the keys 13 can be used for inputting under the prompt of the display screen 12. When the 220V power supply is switched on, the power supply indicator lamp 22 is on after the power supply module 9 works normally, and the cable twisting calibrator is prompted to work normally.
When the checking device performs checking, firstly, the cable twisting limit value needs to be set, and the flow of the checking device is shown in fig. 5. The set mode is selected through the key 13, parameters such as the cable twisting sensor transformation ratio, the number of teeth of a yaw gear disc, clockwise and anticlockwise cable twisting trigger limit values are input, the angle of rotation of the stepping motor required under clockwise and anticlockwise operation can be automatically calculated by the control computer board of the checking device after the situation is determined, and the zero returning button 16 is pressed to ensure that the yaw angle stored in the control computer board 8 is adjusted to be zero. The yaw direction switch 19 is switched according to the requirement, the required rotating direction is selected, such as clockwise, the starting button 14 is pressed, the checking device can automatically rotate clockwise, and the clockwise twisted cable running indicator lamp 17 is also lightened. When the angle is required, the clockwise cable twisting operation indicator lamp 17 is turned off, the stepping motor 6 can automatically stop and brake, and the cable twisting sensor is guaranteed to accurately stop at the set angle. At this moment, the clockwise travel switch of the cable twisting sensor needs to be manually set, firstly, the travel switch locking device is loosened, the clockwise travel switch adjusting bolt is slowly rotated until a click sound is heard, the clockwise cable twisting triggering indicator lamp 20 lights up, and the locking device is screwed down after the clockwise cable twisting travel switch is set. According to the above steps, the yaw direction switch 19 is switched to the counterclockwise mode, and the counterclockwise twisting travel switch can be set.
After the cable twisting limit value is set, the fixed value of the cable twisting sensor needs to be verified, and the flow is shown in fig. 6. The calibration mode is selected through the key 13, parameters such as the cable twisting sensor transformation ratio, the tooth number of a yaw gear disc, clockwise and anticlockwise cable twisting trigger limit values, an allowable error and the like are pressed, and the zero returning button 16 is pressed, so that the yaw angle stored in the control computer board 8 is adjusted to return to zero. The yaw direction change-over switch 1 is switched according to the requirement, the required rotating direction is selected to be clockwise, the starting button 14 is pressed, the checking device can automatically rotate clockwise, and the clockwise twisted cable operation indicator lamp 17 is also lightened. At this time, the calibration device will always send out a rotation instruction until the clockwise cable twisting travel switch of the cable twisting sensor is triggered, and the lamp 20 is lighted. At the moment, the clockwise cable twisting operation indicator lamp 17 is turned off, and the stepping motor 6 stops and brakes, so that the cable twisting sensor is ensured to accurately stop at the current angle. The control computer board 8 compares the current cable twisting angle with the set angle of the clockwise cable twisting, and if the error is within the input allowable deviation range, the display screen 12 displays that the verification is successful; if the error is larger than the input allowable deviation range, the display screen 12 displays that the verification fails, and prompts to perform verification again according to the set mode of the calibrator. If the counter-clockwise cable twisting triggering verification is performed, the procedure is the same as that described above, and the yaw direction selector switch 19 may be switched to the counter-clockwise mode when the yaw direction is selected.
After the clockwise and anticlockwise triggering of the cable twisting sensor is finished and the calibration is in accordance with the standard, the cable twisting sensor is returned to a zero position by a program, and the calibration and declaration of the cable twisting sensor are completed. The cable twisting sensor is carefully disassembled and installed on the wind generating set with the cable returning to the zero position, and the wind generating set can be put into normal operation without field verification.
While the invention has been described in detail, those skilled in the art will appreciate that the various illustrative embodiments and applications of the invention can be made without departing from the spirit and scope of the invention.
Claims (2)
1. An automatic calibration device for a cable twisting sensor of a yaw system of a wind generating set comprises a stepping motor (6), a control computer board (8), a power module (9), a gear disc, a stepping motor driver (10), a wiring terminal row (11), a display screen (12), a clockwise cable twisting operation indicator lamp (17) and a yaw direction change-over switch (19); wind generating set cabin is installed in the frame that uses driftage toothed disc (1) as the focus, and driftage toothed disc (1) is rotatory to be driven wind generating set cabin and impeller horizontal direction rotation to realize wind generating set's wind, its characterized in that: the cable twisting sensor gear disc (3) is arranged beside the yaw gear disc (1) and is meshed with a gear of the yaw gear disc (1), and the rotation of the yaw gear disc (1) is transmitted to the cable twisting sensor gear disc (3); the yaw gear disc (1) drives the cable twisting sensor gear disc (3) to rotate, the rotation direction and the rotation angle of the yaw gear disc are finally transmitted to the cable twisting sensor transmission shaft (4) and finally reflected in the cable twisting sensor travel switch (5); at least two groups of stroke nodes are attached to the cable twisting sensor stroke switch (5) and respectively comprise clockwise cable twisting triggering limit and anticlockwise cable twisting triggering limit, when the cable twisting sensor is installed on an operating wind generating set and used for realizing a cable twisting protection function, clockwise or anticlockwise cable twisting of a fan reaches a limit value, cable twisting protection can be triggered to cause the wind generating set to stop operating; the cable twisting sensor (7) is arranged at the corresponding position of the checking device, and the gear disc above the cable twisting sensor is meshed with the gear disc of the stepping motor (6); a control computer board (8) is arranged in the cable twisting sensor calibration device and used for receiving parameters and control information, generating control signals, inputting the control signals into a stepping motor driver (10) and displaying real-time parameters on a display screen (12) at the same time; the power module (9) is used for converting an input 220V voltage into a 24V direct-current voltage and supplying power to a driver (10) of the stepping motor (6), the control computer board (8) and the display screen (12) respectively, the driver (10) of the stepping motor (6) is an executing mechanism for converting electric pulses sent by the control computer board (8) into angular displacement, and when the 220V power is switched on, the power indicator lamp (22) is turned on after the power module (9) works normally to prompt that the verification device can work normally; the stepping motor driver (10) is provided with a set verification mode and a rotating speed switch key (13), the rotating speed can be selected step by step from 400 to 25000 steps/revolution, and for 1:250, the single-direction verification can be completed within 2 minutes; after the cable twisting sensor (7) is installed in the checking device, a travel switch contact leading-out wire of the cable twisting sensor needs to be connected to a wiring terminal row (11); when the driver (10) of the stepping motor receives a pulse signal, it drives the stepping motor (6) to rotate a fixed angle according to the set direction, the rotation of the stepping motor is operated in one step at the fixed angle, the angular displacement is controlled by controlling the number of pulses, thereby achieving the purpose of accurate positioning, and simultaneously the pulse frequency controls the rotating speed and acceleration of the motor, thereby achieving speed regulation and positioning.
2. The automatic calibration device for the twisted cable sensor of the yaw system of the wind generating set according to claim 1, wherein: the key (13) selects a checking mode, inputs the transformation ratio of the cable twisting sensor, the number of teeth of a yaw gear disc, clockwise and anticlockwise cable twisting trigger limits and allowable errors, selects a clockwise rotation direction, the stepping motor rotates clockwise, the clockwise cable twisting operation indicator lamp (17) is turned on until the clockwise cable twisting travel switch of the cable twisting sensor is triggered, the stepping motor (6) stops and brakes, and the cable twisting sensor accurately stops at the current angle; comparing the current cable twisting angle of the control computer board (8) with the set angle of the clockwise cable twisting, if the error is within the input allowable deviation range, successfully verifying, and if the error is greater than the input allowable deviation range, failing to verify, and re-verifying; if the counter-clockwise cable twisting triggering verification is carried out, the steps are the same as the above steps, and the yaw direction change-over switch (19) is switched to a counter-clockwise mode.
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| CN201410151296.7A CN103967720B (en) | 2014-04-08 | 2014-04-08 | Automatic calibration device for cable twisting sensor of yaw system of wind generating set |
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| CN201410151296.7A CN103967720B (en) | 2014-04-08 | 2014-04-08 | Automatic calibration device for cable twisting sensor of yaw system of wind generating set |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105545589B (en) * | 2015-12-15 | 2018-07-03 | 北京天诚同创电气有限公司 | Wind turbine generator yaw angle calibration method and device |
| CN107728092A (en) * | 2017-10-02 | 2018-02-23 | 国网山西省电力公司电力科学研究院 | The automatic precision pre-check device and method of calibration of Transformer Winding no-load voltage ratio tester |
| CN108194267B (en) * | 2017-12-29 | 2020-10-27 | 华润电力风能（汕头潮南）有限公司 | Fan driftage correction system |
| CN108150354B (en) * | 2017-12-29 | 2019-12-20 | 华润电力风能（汕头潮南）有限公司 | Fan driftage correction system |
| CN108223272B (en) * | 2017-12-29 | 2020-10-27 | 华润电力风能（汕头潮南）有限公司 | Fan driftage correction system |
| CN108799015B (en) * | 2018-07-26 | 2024-02-20 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Verification method of wind turbine generator overspeed protection loop verification device |
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| CN201474859U (en) * | 2009-06-10 | 2010-05-19 | 新疆金风科技股份有限公司 | Wind generator set torsional cable protective device of megawatt level |
| CN201561854U (en) * | 2009-08-21 | 2010-08-25 | 长江三峡能事达电气股份有限公司 | Yaw experiment device of wind power generator unit |
| CN203892127U (en) * | 2014-04-08 | 2014-10-22 | 大唐国际发电股份有限公司张家口发电厂 | Automatic verification device of twisting cable sensor of yaw system of wind generating set |
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| KR101346173B1 (en) * | 2012-02-07 | 2013-12-31 | 삼성중공업 주식회사 | Windmill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201474859U (en) * | 2009-06-10 | 2010-05-19 | 新疆金风科技股份有限公司 | Wind generator set torsional cable protective device of megawatt level |
| CN201561854U (en) * | 2009-08-21 | 2010-08-25 | 长江三峡能事达电气股份有限公司 | Yaw experiment device of wind power generator unit |
| CN203892127U (en) * | 2014-04-08 | 2014-10-22 | 大唐国际发电股份有限公司张家口发电厂 | Automatic verification device of twisting cable sensor of yaw system of wind generating set |
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