CN113586364B - Device, method and system for detecting yaw speed fault of fan yaw system - Google Patents
Device, method and system for detecting yaw speed fault of fan yaw system Download PDFInfo
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- CN113586364B CN113586364B CN202110998627.0A CN202110998627A CN113586364B CN 113586364 B CN113586364 B CN 113586364B CN 202110998627 A CN202110998627 A CN 202110998627A CN 113586364 B CN113586364 B CN 113586364B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a device, a method and a system for detecting yaw speed faults of a fan yaw system, wherein the device comprises a single chip microcomputer, an electric energy quality detector and an independent backup power supply, wherein the electric energy quality detector is used for acquiring a THD value of a three-phase power supply originally supplied by a yaw motor and transmitting the acquired THD value to the single chip microcomputer; the independent backup power supply is used for supplying power to the yaw motor; the single chip microcomputer is used for judging the yaw speed fault reason according to the received THD value and controlling the working states of the independent backup power supply and the original power supply three-phase power supply of the yaw motor; the method can effectively improve the troubleshooting efficiency of yaw speed fault reasons, can report the situation to workers quickly aiming at the situation that the yaw speed fault is frequently reported due to poor power supply quality of the wind motor, effectively reduces the troubleshooting range of the yaw speed fault, saves manpower and improves the efficiency.
Description
Technical Field
The invention relates to the field of wind power, in particular to a device, a method and a system for detecting yaw speed faults of a fan yaw system.
Background
In order to efficiently capture wind energy, an automatic control part in a fan system needs to monitor the condition of natural wind in real time so as to adjust the state of the fan and improve the efficiency of converting wind energy into electric energy. The yaw system is used as an executing component of the wind function realized by the fan, and receives the instruction of the control system to make a corresponding response. However, since natural wind has randomness, when the wind direction changes back and forth, the action of the yaw system becomes frequent, so that the probability of failure increases.
The fan yaw system is composed of a monitoring mechanism such as an anemoscope wind vane and a yaw control PLC mechanism and a yaw control mechanism such as a soft starter, a hydraulic pump and a yaw motor. The soft starter is used for smoothly starting the yaw motor, and when the soft starter works abnormally and cannot start the motor, the fan frequently reports a yaw speed fault and stops. The soft starter has many reasons for faults, one of the reasons is that the soft starter is very sensitive to the quality of a power supply, once the harmonic content of the power supply is too high, the soft starter cannot normally work, and a motor cannot be started, so that a yaw speed fault is triggered, and if the power supply is not processed, unnecessary economic loss is caused to a wind power plant; in addition, each time of failure, manual maintenance is needed, but if the hardware failure of the non-yaw system needs to be checked and found by manpower, unnecessary manpower is needed, and the efficiency is low.
Therefore, for the fault condition, a targeted detection and coping method is necessary to be adopted, so that the monitoring of the wind turbine is further perfected, and the wind power generation benefit is improved.
Disclosure of Invention
The invention aims to provide a device, a method and a system for detecting yaw speed faults of a fan yaw system, and solves the problem that the existing yaw system cannot work due to interference of a soft starter, so that the yaw speed is reported frequently.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a detection device for yaw speed faults of a fan yaw system, which comprises a single chip microcomputer, an electric energy quality detector and an independent backup power supply, wherein the electric energy quality detector is used for acquiring a THD value of an original power supply three-phase power supply of a yaw motor and transmitting the acquired THD value to the single chip microcomputer;
the independent backup power supply is used for supplying power to the yaw motor;
the single chip microcomputer is used for judging the yaw speed fault reason according to the received THD value and controlling the working states of the independent backup power supply and the original power supply three-phase power supply of the yaw motor.
Preferably, a connecting switch is arranged between the independent backup power supply and the yaw motor; the singlechip is connected with the connecting switch.
Preferably, the single chip microcomputer is connected with a connecting switch arranged between a yaw motor original power supply three-phase power supply and the yaw motor through a contactor.
Preferably, a connecting switch is arranged between the yaw motor primary power supply three-phase power supply and the yaw motor; the singlechip is connected with the connecting switch.
Preferably, the single chip microcomputer is connected with a connecting switch arranged between a yaw motor original power supply three-phase power supply and the yaw motor through a contactor.
A method for detecting yaw speed faults of a fan yaw system comprises the following steps:
step 1, acquiring a yaw speed fault signal, and counting the times of receiving the yaw speed fault signal within a preset time, wherein if the counted times is greater than or equal to a preset threshold value, the step 2 is executed;
step 2, collecting THD values of three power supplies of an original power supply in a fan yaw system; comparing the obtained THD value with a preset threshold value, judging the yaw speed fault reason according to the comparison result, and judging whether to switch the power supply of the yaw fan;
Preferably, in step 2, the yaw rate fault cause is judged according to the comparison result, and whether to switch the power supply of the yaw fan is judged, and the specific method is as follows:
if the obtained THD value is larger than a preset threshold value, judging that the yaw speed fault reason is that the power supply electric energy quality of a yaw motor is poor, and switching a power supply of a yaw fan into an independent backup power supply;
and if the obtained THD value is less than or equal to the preset threshold value, analyzing the yaw speed fault reason according to the PLC information of the fan.
Preferably, in step 3, the cause of the yaw rate fault is determined according to the comparison result, and the specific method is as follows:
if the obtained THD value is larger than a preset threshold value, judging that the yaw speed fault reason is that a fault occurs in the yaw motor;
if the obtained THD value is smaller than or equal to a preset threshold value and the frequency of the yaw speed fault signal is smaller than the preset threshold value, judging that the yaw speed fault reason is that the quality of power supply electric energy of a yaw motor is poor;
and if the acquired THD value is less than or equal to a preset threshold value and the frequency of the yaw speed fault signal is greater than or equal to the preset threshold value, analyzing the yaw speed fault reason according to the PLC information of the fan.
A wind turbine yaw system yaw speed fault detection system capable of operating the method, comprising:
the data acquisition unit is used for acquiring a yaw speed fault signal, counting the times of receiving the yaw speed fault signal within preset time, comparing the counted times with a preset threshold value, and transmitting a comparison result to the control unit;
the control unit is used for acquiring THD values of three power supplies of the original power supply in the fan yaw system according to the comparison result; comparing the obtained THD value with a preset threshold value, judging the yaw speed fault reason according to the comparison result, and judging whether to switch the power supply of the yaw fan;
the fault reason judging unit is used for acquiring THD values of three original power supplies in a fan yaw system in real time after switching a power supply of a yaw fan; and comparing the acquired THD value with a preset threshold value, and judging the yaw speed fault reason according to the comparison result.
Compared with the prior art, the invention has the beneficial effects that:
according to the detection system for the yaw speed fault of the fan yaw system, when a detection structure body receives a yaw speed fault signal, the electric energy quality detector is started to obtain the THD value of the original power supply three-phase power supply in real time, the THD value is compared with a set threshold value, and different power supply sources are selected according to the comparison result; the method can effectively improve the troubleshooting efficiency of the yaw speed fault reason, can report the yaw speed fault condition to workers quickly aiming at the condition that the wind power motor frequently reports the yaw speed fault because of poor power supply quality, effectively reduces the troubleshooting range of the yaw speed fault, saves manpower and improves the efficiency; meanwhile, the method does not interfere with the inherent data acquisition and monitoring functions of the fan, and improves the applicability of the method.
Drawings
FIG. 1 is a power mode of a prior art wind turbine yaw system;
fig. 2 is a circuit diagram of a detection device according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The device provided by the invention is a detection system for yaw speed faults of a fan yaw system, and cannot interfere the inherent data acquisition and monitoring functions of a fan, so that the applicability of the device is improved.
Referring to the attached figure 1, the figure is a circuit diagram of an original yaw motor connected with a power supply, and mainly comprises three-phase power, a yaw motor M1, a soft start module Q2 and a yaw motor contactor Q1; referring to fig. 2, in order to add the circuit diagram of the present invention, a detection device is added on the original basis.
The detection device is used for judging whether the THD value of the original power supply three-phase power supply of the yaw motor is obtained or not according to the yaw speed fault signal output by the fan yaw system; and selecting a power supply of the yaw motor according to the THD value.
The detection device comprises a single chip microcomputer 2-1, an electric energy quality detector 2-2, an independent backup power supply 2-3, a plurality of switches and wires which are used as main auxiliary components, no complex circuit is added, and the stability of the device can be guaranteed.
Specifically, the method comprises the following steps:
the single chip microcomputer 2-1 is used for controlling the start and stop of the electric energy quality detector 2-2 according to a yaw speed fault signal output by the fan yaw system; the electric energy quality detector 2-2 is used for acquiring a THD value of an original power supply three-phase power supply of the yaw motor and transmitting the acquired THD value to the single chip microcomputer 2-1;
the independent backup power supply 2-3 is used for supplying power to the yaw motor;
the single chip microcomputer 2-1 is used for controlling the working states of the independent backup power supply 2-3 and the original power supply three-phase power supply of the yaw motor according to the received THD value.
The working principle of the invention is as follows:
the device is designed aiming at the condition that a yaw system cannot work due to interference of a soft starter and frequently reports yaw speed faults, and the device starts to work when receiving a signal that a fan system reports the yaw speed faults.
The device is arranged in the engine room and close to the power supply position of the yaw motor, and the yaw motor usually obtains electric energy directly from a power grid connected with the fan, so that the detection object of the electric energy quality detector is the power supply three-phase power supply of the yaw motor.
The independent backup power supply 2-3 is started after the fact that the power quality problem of the yaw motor power supply exists is determined.
The single chip microcomputer 2-1 is the main control of the device, has a communication function, receives information of a fan system and an electric energy quality detector, and controls the yaw motor and an original power supply as well as the switch between the yaw motor and an independent backup power supply.
The single chip microcomputer 2-1 maintains a connection state in real time, prepares to receive information from the fan yaw system, and when the fan yaw system frequently reports a yaw speed fault in a short time, as defined in this embodiment, the single chip microcomputer receives a yaw speed fault signal five times within ten minutes, the single chip microcomputer 2-1 starts to read a THD value (total harmonic distortion) of the power quality detector 2-2, and determines a cause of the fan yaw speed fault according to the THD value, specifically:
in the present embodiment, it is defined that the THD value does not exceed 0.01 in the normal case; wherein:
if the single chip microcomputer 2-1 continues for one minute and the THD of the electric energy quality detector is larger than 0.01, the single chip microcomputer 2-1 sends information to a wind farm master control worker through communication equipment, the information content is that the power supply electric energy quality of the yaw motor is poor and the yaw motor is ready to enter a backup power supply mode and please stop, meanwhile, the single chip microcomputer 2-1 controls a contactor to disconnect a connecting switch of the yaw motor and an original power supply, after a certain delay, the single chip microcomputer 2-1 controls a contactor switch of the backup power supply to enable the yaw motor to be connected with the backup power supply 2-3, at the moment, the single chip microcomputer 2-1 sends information to the wind farm worker to inform the yaw motor that the backup power supply is obtained, and the worker confirms that the fan can be restarted again.
If the single chip microcomputer 2-1 continuously obtains that the THD of the electric energy quality detector is not more than 0.01 in one minute, the single chip microcomputer 2-1 sends information to main control workers of the wind power plant, the information content is 'yaw speed failure, stop is requested', at the moment, the backup power supply 2-3 does not participate in work, the main control workers still receive the fan PLC information, and analysis is carried out according to the fan PLC information.
After the yaw motor enters a mode of backup power supply, the single chip microcomputer 2-1 still monitors the THD value of the electric energy quality instrument in real time, wherein:
if the THD value is still not in the allowable range (namely the THD value is larger than 0.01 in the last minute defined in the embodiment), the singlechip 2-1 sends the information to the wind farm staff, and the information content is that a problem occurs in the yaw motor and the yaw motor requires shutdown and repair;
if the THD value is recovered to be normal and the fan does not report yaw speed faults frequently any more, the fact that the factors causing the yaw speed faults are not on main yaw components such as a yaw motor is proved, the single chip microcomputer 2-1 sends information to wind power plant workers, and the content is that the faults are caused by power quality problems and the workers need to stop the machine for repairing.
If the THD value is recovered to be normal and the fan still frequently reports the yaw speed fault, the single chip microcomputer 2-1 sends information to wind farm main control workers, the information content is 'yaw speed fault, stop is requested', at the moment, the backup power supply 2-3 does not participate in working, the main control workers still receive fan PLC information, and analysis is carried out according to the fan PLC information.
The invention provides a detection system for yaw speed fault of a fan yaw system, which comprises:
the data acquisition unit is used for acquiring a yaw speed fault signal, counting the times of receiving the yaw speed fault signal within preset time, comparing the counted times with a preset threshold value, and transmitting a comparison result to the control unit;
the control unit is used for acquiring THD values of three power supplies of the original power supply in the fan yaw system according to the comparison result; comparing the obtained THD value with a preset threshold value, judging the yaw speed fault reason according to the comparison result, and judging whether to switch the power supply of the yaw fan;
the fault reason judging unit is used for acquiring THD values of three power supplies of the original power supply in the yaw system of the fan in real time after the power supply of the yaw fan is switched; and comparing the acquired THD value with a preset threshold value, and judging the yaw speed fault reason according to the comparison result.
The method can effectively improve the troubleshooting efficiency of the yaw speed fault reason, can report the situation to workers quickly aiming at the situation that the yaw speed fault is frequently reported due to poor power supply quality of the wind motor, effectively reduces the troubleshooting range of the yaw speed fault, saves manpower and improves efficiency.
Claims (6)
1. A detection method for yaw speed faults of a fan yaw system based on a detection system is characterized by comprising a single chip microcomputer (2-1), an electric energy quality detector (2-2) and an independent backup power supply (2-3), wherein the electric energy quality detector (2-2) is used for obtaining a THD value of a three-phase power supply originally supplied by a yaw motor and transmitting the obtained THD value to the single chip microcomputer (2-1);
the independent backup power supply (2-3) is used for supplying power to the yaw motor;
the single chip microcomputer (2-1) is used for judging the yaw speed fault reason according to the received THD value and controlling the working states of the independent backup power supply (2-3) and the original power supply three-phase power supply of the yaw motor;
the method comprises the following steps:
step 1, acquiring a yaw speed fault signal, and counting the times of receiving the yaw speed fault signal within a preset time, wherein if the counted times is greater than or equal to a preset threshold value, the step 2 is executed;
step 2, collecting THD values of three power supplies of an original power supply in a fan yaw system; comparing the obtained THD value with a preset threshold value, judging the yaw speed fault reason according to the comparison result, and judging whether to switch the power supply of the yaw fan;
step 3, collecting THD values of three power supplies of the original power supply in the yaw system of the fan in real time after switching the power supply of the yaw fan; comparing the obtained THD value with a preset threshold value, and judging the yaw speed fault reason according to the comparison result;
in step 3, judging the reason of the yaw speed fault according to the comparison result, wherein the specific method comprises the following steps:
if the obtained THD value is larger than a preset threshold value, judging that the yaw speed fault reason is that a fault occurs in the yaw motor;
if the obtained THD value is smaller than or equal to a preset threshold value and the frequency of the yaw speed fault signal is smaller than the preset threshold value, judging that the yaw speed fault reason is that the quality of power supply electric energy of a yaw motor is poor;
and if the acquired THD value is less than or equal to a preset threshold value and the frequency of the yaw speed fault signal is greater than or equal to the preset threshold value, analyzing the yaw speed fault reason according to the PLC information of the fan.
2. The method for detecting the yaw speed fault of the wind turbine yaw system according to claim 1, wherein in the step 2, the reason of the yaw speed fault is judged according to the comparison result, and whether a power supply of the yaw wind turbine is switched or not is judged, and the specific method is as follows:
if the obtained THD value is larger than a preset threshold value, judging that the yaw speed fault reason is poor power supply electric energy quality of a yaw motor, and switching a power supply of a yaw fan into an independent backup power supply (2-3);
and if the obtained THD value is less than or equal to the preset threshold value, analyzing the yaw speed fault reason according to the PLC information of the fan.
3. The method for detecting the yaw speed fault of the wind turbine yaw system according to claim 1, wherein a connection switch is arranged between the independent backup power supply (2-3) and a yaw motor; the singlechip (2-1) is connected with the connecting switch.
4. The method for detecting the yaw speed fault of the wind turbine yaw system according to claim 1, wherein the single chip microcomputer (2-1) is connected with a connecting switch arranged between a yaw motor primary power supply three-phase power supply and the yaw motor through a contactor.
5. The method for detecting the yaw speed fault of the wind turbine yaw system according to claim 1, wherein a connecting switch is arranged between a primary power supply three-phase power supply of the yaw motor and the yaw motor; the singlechip (2-1) is connected with the connecting switch.
6. A wind turbine yaw system yaw rate fault detection system capable of operating the method of any of claims 1-5, comprising:
the data acquisition unit is used for acquiring a yaw speed fault signal, counting the times of receiving the yaw speed fault signal within preset time, comparing the counted times with a preset threshold value, and transmitting a comparison result to the control unit;
the control unit is used for acquiring THD values of three power supplies of the original power supply in the fan yaw system according to the comparison result; comparing the obtained THD value with a preset threshold value, judging the yaw speed fault reason according to the comparison result, and judging whether to switch the power supply of the yaw fan;
the fault reason judging unit is used for acquiring THD values of three power supplies of the original power supply in the yaw system of the fan in real time after the power supply of the yaw fan is switched; and comparing the acquired THD value with a preset threshold value, and judging the yaw speed fault reason according to the comparison result.
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| JP6313033B2 (en) * | 2013-12-05 | 2018-04-18 | ナブテスコ株式会社 | Windmill drive device and windmill drive unit |
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| CN105041570B (en) * | 2015-07-30 | 2017-12-15 | 北京天诚同创电气有限公司 | Yaw control method and device for wind turbine generator |
| US10273940B2 (en) * | 2016-05-12 | 2019-04-30 | General Electric Company | System and method for detecting pitch bearing damage in a wind turbine |
| CN108131250B (en) * | 2017-12-21 | 2019-05-14 | 重庆华渝重工机电有限公司 | A kind of auxiliary drive device and its control method of pitch-controlled system |
| CN108802614A (en) * | 2018-05-31 | 2018-11-13 | 山西大学 | The monitoring warning device of wind power yawing motor |
| CN109812389A (en) * | 2019-01-31 | 2019-05-28 | 湖南工程学院 | A kind of wind-driven generator power quality and health status comprehensive monitoring and controlling method |
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| CN108757341A (en) * | 2018-05-02 | 2018-11-06 | 明阳智慧能源集团股份公司 | A kind of high intelligent fault diagnosis method of large-scale half direct-drive unit yawing velocity |
| CN112303157A (en) * | 2020-11-20 | 2021-02-02 | 西安热工研究院有限公司 | State monitoring device and monitoring method for fan yaw braking system |
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