CN111486062A - Intelligent safety monitoring method and system for wind generating set tower - Google Patents
Intelligent safety monitoring method and system for wind generating set tower Download PDFInfo
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- CN111486062A CN111486062A CN202010243858.6A CN202010243858A CN111486062A CN 111486062 A CN111486062 A CN 111486062A CN 202010243858 A CN202010243858 A CN 202010243858A CN 111486062 A CN111486062 A CN 111486062A
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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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- 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
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
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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
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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
- Y02E10/728—Onshore wind turbines
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Abstract
The invention discloses a safe and intelligent monitoring method and system for a wind generating set tower, which solve the problems of large inspection workload and danger in the inspection process caused by tower vibration in the prior art. And respectively arranging a double-shaft inclination angle sensor on the tower base and the tower top. The tower base acquisition station periodically sends a reading instruction to the sensors according to the sampling rate of each sensor, acquires sensor data, the server periodically acquires the acquisition station data, the upper computer analyzes the data acquired by the server and can also analyze the real-time data, the safety state of the tower is judged through a preset safety threshold, the trend of tower vibration can be predicted by analyzing the real-time data, the inspection workload of field operation and maintenance personnel is reduced, and the inspection safety is improved to predict and predict the dangerous state in time.
Description
Technical Field
The invention relates to the technical field of wind power, in particular to a wind generating set tower safety intelligent monitoring method and system for monitoring the safety state of a tower structure in real time, reducing the inspection workload of field operation and maintenance personnel and improving the working efficiency.
Background
With the continuous increase of installed capacity of wind power generation and large-scale development of wind power plant projects in China, areas with good wind resources which can be developed and utilized in China are increasingly reduced. Currently, onshore wind power is continuously developing to low wind speed areas. In order to better develop wind resources in low wind speed areas, wind power complete machine manufacturers develop ultrahigh tower units. As high towers, especially flexible towers, become hot spots in the industry more and more, and especially in recent two years, tower falling accidents of multiple high tower crane units occur, and the safety of the high towers also becomes the focus of attention of owners and wind power complete machine manufacturers. The current pylon safety inspection is mainly examined through the manual work surely, this has increased a large amount of work load for on-the-spot fortune dimension personnel, the working method of this kind of manual work examining still has very big operation risk, and regular inspection is generally two days to three days and just inspects once, the mode of patrolling and examining at present regularly brings huge work load for fortune dimension personnel and leads to fortune dimension personnel unable timely feedback pylon safe condition, and use unmanned aerial vehicle to patrol and examine and bring continuation of the journey poor, the problem of difficult operation again.
For example, a "charging device for an unmanned aerial vehicle and a wind turbine generator set" disclosed in chinese patent literature has a publication No. CN207433831U, which includes a base, a clamping assembly including a first clamping member and a second clamping member movably connected to the base and oppositely disposed, wherein at least a portion of each of the first clamping member and the second clamping member protrudes from the base to clamp and fix the unmanned aerial vehicle; and the charging assembly comprises a first terminal and a second terminal which can be electrically connected with each other, the first terminal is arranged on the base and located between the first clamping piece and the second clamping piece, the first terminal is electrically connected with the output power supply, and the second terminal can be arranged on the unmanned aerial vehicle and electrically connected with a battery of the unmanned aerial vehicle so as to convey the electric energy of the wind generating set to the battery of the unmanned aerial vehicle. However, although this scheme uses unmanned aerial vehicle to patrol and examine work, has saved the labour of manual work, but unmanned aerial vehicle operation is difficult to operate, and unmanned aerial vehicle also needs manual control, still can't in time feed back the safe condition of pylon when having dangerous situation, still needs the operation and maintenance personnel scene to look over and judge, extravagant manpower and there is danger.
Disclosure of Invention
The invention provides a wind generating set tower safety intelligent monitoring method and system for overcoming the problems that the inspection workload is large and the tower vibration can cause danger in the inspection process in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a wind generating set pylon safety intelligent monitoring system, includes the machine tower, its characterized in that still includes:
the tower top inclination angle sensor is used for acquiring an inclination angle, and the acquired inclination angle data is accessed to a tower base acquisition station;
the acceleration sensor in the tower is used for acquiring an acceleration value and accessing acceleration data to a tower base acquisition station;
the tower footing inclination angle sensor is used for acquiring an inclination angle, and the acquired inclination angle data is accessed to a tower footing acquisition station;
the RS485 module is used for connecting the tower top inclination angle sensor, the tower middle acceleration sensor and the tower foundation inclination angle sensor with the tower foundation acquisition station;
the tower base acquisition station is used for acquiring the inclination angle data deployed on the tower base and the tower top, performing low-pass filtering on the inclination angle data, performing band-pass filtering on the acceleration data, and storing and sending the inclination angle data and the acceleration data;
the tower footing switch acts between the tower footing acquisition station and the server and is used for exchanging disk storage data;
the server receives the disk storage data sent by the tower footing collector, integrates the data and sends the integrated data to the upper computer;
the upper computer analyzes the tower top inclination angle data to calculate a tower top displacement characteristic value and a corresponding direction, analyzes acceleration data in the tower to calculate a characteristic value of tower drum vibration data, and judges whether the characteristic value exceeds the warning;
the tower top inclination angle sensor is arranged at the top of the tower, the tower middle acceleration sensor is arranged in the middle of the tower, the tower foundation inclination angle sensor is arranged at the bottom of the tower, the RS485 module, the tower foundation acquisition station, the tower foundation switch, the server and the upper computer are sequentially connected, and the RS485 module is further connected with the tower top inclination angle sensor, the tower middle acceleration sensor and the tower foundation inclination angle sensor respectively.
The invention mainly comprises modules such as a tower top double-shaft tilt sensor, a tower middle acceleration sensor, a tower base double-shaft tilt sensor, a tower base acquisition station, a tower base exchanger, a server, an upper computer and the like. A double-shaft tilt angle sensor is respectively arranged on a tower base and a tower top, the tilt angles in two directions of X, Y can be collected, an acceleration sensor is arranged at the middle section of a tower barrel, the acceleration values in two directions of X, Y can be collected, signals are accessed to a tower base collecting station, the tower base collecting station preprocesses the signals and then caches the signals to a server, the server can send collecting instructions to the tower top tilt angle sensor, the acceleration sensor in the tower and the tower base tilt angle sensor through the tower base collecting station, the server sends the collected data to an upper computer for calculation and analysis, the analysis result is compared with a preset threshold value, and whether the unit is in a safe state or not is judged and the state is sent to a unit worker.
Preferably, the RS485 module comprises an RS485 bus, the tower top inclination angle sensor, the tower middle acceleration sensor, the tower base inclination angle sensor and the tower base acquisition station are all hung on the RS485 bus, the tower top inclination angle sensor, the tower middle acceleration sensor and the tower base inclination angle sensor are used as RS485 bus slave stations, and the tower base acquisition station is used as an RS485 bus master station. Each sensor and each tower footing acquisition station are hung on an RS485 bus, each sensor serves as a bus slave station, each tower footing acquisition station serves as a bus master station, each acquisition station on the other side and the server are connected with the server, and the upper computer is connected with the server.
Preferably, the tower top inclination angle sensor, the tower middle acceleration sensor and the tower foundation inclination angle sensor are all double-shaft inclination angle sensors. The sensor can obtain tilt angle data and acceleration data in the X direction and the Y direction, respectively, which are perpendicular to each other.
An intelligent monitoring method for safety of a tower of a wind generating set, which applies the system of claim 1, is characterized by comprising the following steps:
s1: acquiring inclination angle data by a tower top inclination angle sensor and a tower footing inclination angle sensor;
s2: an acceleration sensor in the tower collects acceleration data;
s3: the tower footing acquisition station acquires inclination angle data and acceleration data, and performs filtering and calculation processing;
s4: the upper computer analyzes the tower footing inclination angle data to obtain an uneven settlement characteristic value and a corresponding direction, analyzes the tower top inclination angle data to calculate a tower top displacement characteristic value and a corresponding direction, analyzes acceleration data in the tower to calculate a characteristic value of tower drum vibration data;
s5: the upper computer judges whether the characteristic values of the differential settlement, the tower top displacement and the tower drum vibration data exceed the warning values, if one exceeds the warning value, the S6 is entered, and if not, the S1 is returned;
s6: the system alarms and controls the wind turbine generator to stop;
the system comprises a tower footing acquisition station, a tower footing control station and a control system, wherein the inclination angle data comprises inclination angle values in an X direction and a Y direction, the X direction is a horizontal direction, the Y direction is a vertical direction, the acceleration data comprises inclination angle values in the X direction and the Y direction, the X direction is a horizontal direction, the Y direction is a vertical direction, the sampling frequency of the tower footing acquisition station for acquiring the inclination angle data is 10HZ, and the sampling frequency of the tower footing acquisition station for acquiring the acceleration data is 25.6 HZ; the calculation cycle of the inclination angle data is 100s, namely 1000 points are collected by the 100s inclination angle data to form a group of waveform data; the calculation period of the acceleration data is 10s, namely 256 points are collected by the acceleration data 10s to form a set of waveform data.
After the system is started, the tower base acquisition station periodically initiates a reading instruction to the sensors according to the sampling rate of each sensor, acquires sensor data, and meanwhile, the server periodically acquires the data of the acquisition station, and the upper computer analyzes the data acquired by the server.
Preferably, the S3 includes the following steps:
s31: the tower footing acquisition station monitors the inclination angle data of the tower footing and calculates the synthetic angle and the direction angle of the inclination angle data, analyzes the uneven settlement of the foundation and the corresponding direction, stores the data in a disk, acquires the inclination angle data of the tower footing, calculates the synthetic angle and the direction angle of the inclination angle data, analyzes the displacement of the tower footing and the corresponding direction, and stores the data in a disk;
s32: and the tower base acquisition station monitors acceleration data and performs data processing.
And calculating the synthetic acceleration by an acceleration sensor in the acquisition tower, rolling and calculating the maximum value, the minimum value, the peak-to-peak value and the effective value of the latest 10s data by taking the sampling rate as the frequency, analyzing the vibration condition of the tower drum, and storing the data in a disk.
Preferably, the S31 includes the following steps:
s311: judging whether the sampling period reaches 100S, if so, entering S312, otherwise, entering S312 after data acquisition;
s312: resetting a sampling timer;
s313: calculating a composite angle and a direction angle of the inclination angle data;
s314: calculating the characteristic value of the data in the period;
s315: the tower footing acquisition station stores the waveform data and the characteristic value data in a disk;
s316: and sending all the data to an upper computer.
Preferably, the method of calculating the combined angle at S313 is as follows:
the tower base inclination angle sensor and the tower top inclination angle sensor obtained by the tower base acquisition station acquire the composite angle α of the inclination angle values in the x direction and the y direction and the relation is that tan2α＝tan2x+tan2y
A resultant angle can be obtained
The azimuth angle θ is calculated as follows:
calculating the effective value of the waveform as one waveform period per 100s
Where N is the number of sample points for one waveform period, αiStoring the effective value and the original waveform data in a disk for each synthetic angle;
the positive value of the output angle of the x axis points to the north, and the azimuth angle is 0 degree; the negative value of the output angle of the x axis points to the south, and the azimuth angle is 180 degrees; the positive value of the output angle of the y axis points to the east, and the azimuth angle is 90 degrees; the negative y-axis output angle points west with an azimuth of 270. Calculating a synthetic angle and a direction angle of the tower footing by collecting the inclination angle of the tower footing, analyzing the uneven settlement of the foundation and the corresponding direction, and storing data in a disk; by collecting the inclination angle of the tower top, the synthetic angle and the direction angle of the tower top are calculated, the displacement and the corresponding direction of the tower top are analyzed, and the data are stored in a disk.
Preferably, the S32 includes the following steps:
s321: judging whether the width of the sliding window reaches 10S for the first time, if so, entering S322, otherwise, storing the acquired data into a cache and repeating S321;
s322: judging whether the cache is looped, if so, entering S323, otherwise, directly intercepting the acceleration data of the latest 10S in the cache and then entering S324;
s323: respectively intercepting the latest 10s of acceleration data from the tail part and the head part of the cache, and splicing the acceleration data of the tail part and the head part;
s324: storing the intercepted/spliced acceleration data into a sliding window for caching;
s325: calculating an effective value, a peak-to-peak value and a peak value of acceleration data in a sliding window;
s326: the tower footing acquisition station stores the effective value, the peak-to-peak value and the peak value of the acceleration data into a cache;
s327: the tower base acquisition station sends all data to the next module and returns to S322.
Preferably, the acceleration data in S325 is divided into two directions, namely X and Y, and the signal directly acquired by the tower-based acquisition station is axAnd Ay，
The acceleration is synthesized and then the acceleration is synthesized,
the calculation method is to calculate the maximum value, the minimum value, the peak-to-peak value and the effective value of the latest 10s256 points of the synthesized acceleration in a rolling manner by taking the sampling period as the calculation period.
Therefore, the invention has the following beneficial effects:
1. the invention mainly comprises modules such as a tower top double-shaft tilt sensor, a tower middle acceleration sensor, a tower base double-shaft tilt sensor, a tower base acquisition station, a tower base exchanger, a server, an upper computer and the like. The method comprises the following steps that a double-shaft inclination angle sensor is respectively arranged on a tower base and a tower top, inclination angles in two directions of X, Y can be collected, an acceleration sensor is arranged at the middle section of a tower barrel, acceleration values in two directions of X, Y can be collected, signals are connected to a tower base collecting station, the tower base collecting station preprocesses the signals and then caches the signals to a server, the server can send collecting instructions to the tower top inclination angle sensor, a tower in-tower acceleration sensor and the tower base inclination angle sensor through the tower base collecting station, the server sends collected data to an upper computer for calculation and analysis, an analysis result is compared with a preset threshold value, whether a unit is in a safe state or not is judged, and the state is sent to a unit worker;
2. after the system is started, the tower base acquisition station periodically sends a reading instruction to the sensors according to the sampling rate of each sensor and acquires sensor data, meanwhile, the server periodically acquires the data of the acquisition station, the upper computer analyzes the data acquired by the server, the state of the tower can be monitored in real time through the wind generating set tower safety intelligent monitoring system and a method matched with the system, the system can also analyze the real-time data, the safety state of the tower is judged through a preset safety threshold value, the trend of tower vibration can be predicted by analyzing the real-time data, the inspection workload of field operation and maintenance personnel can be reduced, manpower waste is avoided, and the inspection safety is greatly improved to predict and predict dangerous states in time.
Drawings
Fig. 1 is a block diagram of the system configuration of the present embodiment.
Fig. 2 is a flow chart of the operation of the present invention.
Fig. 3 is a schematic diagram of the inclination data collected by the tower base collection station of the present invention.
FIG. 4 is a flow chart of the present invention for collecting and processing tilt angle data.
Fig. 5 is a schematic view of acceleration data collected by the acceleration sensor of the present invention.
FIG. 6 is a flow chart of the present invention for collecting and processing acceleration data.
In the figure: 1. the system comprises a tower top inclination angle sensor 2, a tower middle acceleration sensor 3, a tower base inclination angle sensor 4, an RS485 module 5, a tower base acquisition station 6, a tower base switch 7, a server 8 and an upper computer.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
Example (b):
the intelligent safety monitoring system for the tower of the wind generating set comprises a tower, a tower top inclination angle sensor 1, a double-shaft tower middle acceleration sensor 2, a double-shaft tower base inclination angle sensor 3, an RS485 module 4, a tower base acquisition station 5, a tower base switch 6, a server 7 and an upper computer 8, wherein a base ring flange is installed on the tower, a platform ladder stand is further installed on the tower top, the tower base inclination angle sensor 1 is installed on the base ring flange, the tower top inclination angle sensor is installed opposite to the tower top platform ladder stand, the tower top inclination angle sensor 1 is used for acquiring an inclination angle, and acquired inclination angle data are accessed into the tower base acquisition station 5; the acceleration sensor 2 in the tower is used for acquiring an acceleration value and accessing acceleration data to a tower base acquisition station 5; the tower footing inclination angle sensor 3 is used for collecting inclination angles and accessing collected inclination angle data to the tower footing collecting station 5; the RS485 module 4 is composed of an RS485 bus, the RS485 bus adopts a half-duplex working mode, supports multi-point data communication, and adopts balanced transmission and differential reception, so that the RS485 bus has the capability of inhibiting common-mode interference, and the RS485 bus transceiver has high sensitivity and can detect voltage as low as 200mv, so that transmission signals can be recovered beyond kilometers, the RS485 bus is used for connecting the tower top inclination angle sensor 1, the tower middle acceleration sensor 2 and the tower foundation inclination angle sensor 3 with the tower foundation acquisition station 5, the tower top inclination angle sensor 1, the tower middle acceleration sensor 2, the tower foundation inclination angle sensor 3 and the tower foundation acquisition station 4 are all hung on the RS485 bus, the tower top inclination angle sensor 1, the tower middle acceleration sensor 2 and the tower foundation inclination angle sensor 3 serve as RS485 slave station buses, and the tower foundation acquisition station 5 serves as an RS485 bus master station; the tower base acquisition station 5 is used for acquiring the inclination angle data deployed on the tower base and the tower top, performing low-pass filtering on the inclination angle data, performing band-pass filtering on the acceleration data, and storing and sending the inclination angle data and the acceleration data; the tower base exchanger 6 acts between the tower base acquisition station 5 and the server 7 and is used for exchanging the disk storage data; the server 7 receives the disk storage data sent by the tower footing collector 5, integrates the data and sends the integrated data to the upper computer 8; the upper computer 8 is used for analyzing the tower top inclination angle data to calculate a tower top displacement characteristic value and a corresponding direction, analyzing the acceleration data in the tower to calculate a characteristic value of the tower drum vibration data, and judging whether the characteristic value exceeds the warning.
The embodiment also provides an intelligent monitoring method for the safety of the tower of the wind generating set, which applies the intelligent monitoring system for the safety of the tower of the wind generating set to work, and specifically comprises the following steps:
s1: acquiring inclination angle data by a tower top inclination angle sensor and a tower footing inclination angle sensor;
s2: an acceleration sensor in the tower collects acceleration data;
s3: the tower footing acquisition station acquires inclination angle data and acceleration data, and performs filtering and calculation processing; in the step, the inclination angle of the tower footing is collected, the synthetic angle and the direction angle of the tower footing are calculated, the uneven settlement of the foundation and the corresponding direction are analyzed, and data are stored in a disk; by collecting the inclination angle of the tower top, the synthetic angle and the direction angle of the tower top are calculated, the displacement and the corresponding direction of the tower top are analyzed, and the data are stored in a disk.
The step S3 specifically includes the following steps:
s31: the tower footing acquisition station monitors the inclination angle data of the tower footing and calculates the synthetic angle and the direction angle of the inclination angle data, analyzes the uneven settlement of the foundation and the corresponding direction, stores the data in a disk, acquires the inclination angle data of the tower footing, calculates the synthetic angle and the direction angle of the inclination angle data, analyzes the displacement of the tower footing and the corresponding direction, and stores the data in a disk;
wherein, step S31 specifically includes the following steps:
s311: judging whether the sampling period reaches 100S, if so, entering S312, otherwise, entering S312 after data acquisition;
s312: resetting a sampling timer;
s313: calculating a composite angle and a direction angle of the inclination angle data;
s314: calculating the characteristic value of the data in the period;
s315: the tower footing acquisition station stores the waveform data and the characteristic value data in a disk;
s316: and sending all the data to an upper computer.
In addition, step S313 requires the calculation of the resultant angle and the azimuth angle, and the resultant angle and the azimuth angle are specifically calculated by acquiring the x-direction and y-direction inclination angle value resultant angle α from the tower footing collecting station to the tower footing inclination angle sensor and the tower top inclination angle sensor and by the relationship between the resultant angle and the inclination angle value resultant angle, tan2α＝tan2x+tan2y
A resultant angle can be obtained
The azimuth angle θ is calculated as follows:
calculating the effective value of the waveform as one waveform period per 100s
Where N is the number of sample points for one waveform period, αiStoring the effective value and the original waveform data in a disk for each synthetic angle;
the positive value of the output angle of the x axis points to the north, and the azimuth angle is 0 degree; the negative value of the output angle of the x axis points to the south, and the azimuth angle is 180 degrees; the positive value of the output angle of the y axis points to the east, and the azimuth angle is 90 degrees; the negative y-axis output angle points west with an azimuth of 270.
S32: and the tower base acquisition station monitors acceleration data and performs data processing.
Wherein, step S32 includes the following steps:
s321: judging whether the width of the sliding window reaches 10S for the first time, if so, entering S322, otherwise, storing the acquired data into a cache and repeating S321;
s322: judging whether the cache is looped, if so, entering S323, otherwise, directly intercepting the acceleration data of the latest 10S in the cache and then entering S324;
s323: respectively intercepting the latest 10s of acceleration data from the tail part and the head part of the cache, and splicing the acceleration data of the tail part and the head part;
s324: storing the intercepted/spliced acceleration data into a sliding window for caching;
s325: calculating an effective value, a peak-to-peak value and a peak value of acceleration data in a sliding window;
s326: the tower footing acquisition station stores the effective value, the peak-to-peak value and the peak value of the acceleration data into a cache;
s327: the tower base acquisition station sends all data to the next module and returns to S322.
In S325, the acceleration data is divided into X and Y directions, and the signal directly acquired by the tower base acquisition station is AxAnd Ay，
The acceleration is synthesized and then the acceleration is synthesized,
the calculation method is to calculate the maximum value, the minimum value, the peak-to-peak value and the effective value of the latest 10s256 points of the synthesized acceleration in a rolling manner by taking the sampling period as the calculation period. And calculating the maximum value, the minimum value, the peak-to-peak value and the effective value of the synthesized acceleration to analyze the vibration condition of the tower drum, and storing data in a disk.
S4: the upper computer analyzes the tower footing inclination angle data to obtain an uneven settlement characteristic value and a corresponding direction, analyzes the tower top inclination angle data to calculate a tower top displacement characteristic value and a corresponding direction, analyzes acceleration data in the tower to calculate a characteristic value of tower drum vibration data;
s5: the upper computer judges whether the characteristic values of the differential settlement, the tower top displacement and the tower drum vibration data exceed the warning values, if one exceeds the warning value, the S6 is entered, and if not, the S1 is returned;
s6: and the system alarms to control the wind turbine generator to stop.
The inclination angle data comprise inclination angle values in an X direction and a Y direction, and the X direction is vertical to the Y direction; the sampling frequency of the inclination angle data collected by the tower base collecting station is 10HZ, and the sampling frequency of the acceleration data collected by the tower base collecting station is 25.6 HZ; the calculation cycle of the inclination angle data is 100s, namely 1000 points are collected by the 100s inclination angle data to form a group of waveform data; the calculation period of the acceleration data is 10s, namely 256 points are collected by the acceleration data 10s to form a set of waveform data.
The system mainly comprises modules such as a tower top double-shaft tilt sensor, a tower middle acceleration sensor, a tower base double-shaft tilt sensor, a tower base acquisition station, a tower base exchanger, a server, an upper computer and the like. The method comprises the following steps that a double-shaft inclination angle sensor is respectively arranged on a tower base and a tower top, inclination angles in two directions of X, Y can be collected, an acceleration sensor is arranged at the middle section of a tower barrel, acceleration values in two directions of X, Y can be collected, signals are connected to a tower base collecting station, the tower base collecting station preprocesses the signals and then caches the signals to a server, the server can send collecting instructions to the tower top inclination angle sensor, a tower in-tower acceleration sensor and the tower base inclination angle sensor through the tower base collecting station, the server sends collected data to an upper computer for calculation and analysis, an analysis result is compared with a preset threshold value, whether a unit is in a safe state or not is judged, and the state is sent to a unit worker; after the system is started, the tower base acquisition station periodically sends a reading instruction to the sensors according to the sampling rate of each sensor and acquires sensor data, meanwhile, the server periodically acquires the data of the acquisition station, the upper computer analyzes the data acquired by the server, the state of the tower can be monitored in real time through the wind generating set tower safety intelligent monitoring system and a method matched with the system, the system can also analyze the real-time data, the safety state of the tower is judged through a preset safety threshold value, the trend of tower vibration can be predicted by analyzing the real-time data, the inspection workload of field operation and maintenance personnel can be reduced, manpower waste is avoided, and the inspection safety is greatly improved to predict and predict dangerous states in time.
The above embodiments are described in detail for the purpose of further illustrating the present invention and should not be construed as limiting the scope of the present invention, and the skilled engineer can make insubstantial modifications and variations of the present invention based on the above disclosure.
Claims (9)
1. The utility model provides a wind generating set pylon safety intelligent monitoring system, includes the machine tower, its characterized in that still includes:
the tower top inclination angle sensor (1) is used for acquiring an inclination angle, and the acquired inclination angle data is accessed to a tower base acquisition station (5);
the acceleration sensor (2) in the tower is used for acquiring an acceleration value and accessing acceleration data to the tower base acquisition station (5);
the tower footing inclination angle sensor (3) is used for acquiring an inclination angle, and the acquired inclination angle data is accessed to the tower footing acquisition station (5);
the RS485 module (4) is used for connecting the tower top inclination angle sensor (1), the tower middle acceleration sensor (2) and the tower base inclination angle sensor (3) with the tower base acquisition station (5);
the tower base acquisition station (5) is used for acquiring the inclination angle data deployed on the tower base and the tower top, performing low-pass filtering on the inclination angle data, performing band-pass filtering on the acceleration data, and storing and sending the inclination angle data and the acceleration data;
the tower base switch (6) is used for switching the storage data between the tower base acquisition station (5) and the server (7);
the server (7) receives the disk storage data sent by the tower footing collector (5), integrates the data and sends the integrated data to the upper computer (8);
the upper computer (8) analyzes the tower top inclination angle data to calculate a tower top displacement characteristic value and a corresponding direction, analyzes the acceleration data in the tower to calculate a characteristic value of the tower drum vibration data, and judges whether the characteristic value exceeds the warning;
wherein, top of the tower inclination sensor (1) sets up at the tower top, acceleration sensor (2) set up in the tower middle part, column foot inclination sensor (3) set up in the tower bottom, RS485 module (4), column foot collection station (5), column foot switch (6), server (7) and host computer (8) connect gradually, RS485 module (4) still are connected with top of the tower inclination sensor (1), acceleration sensor (2) and column foot inclination sensor (3) in the tower respectively.
2. The intelligent monitoring system for the safety of the tower of the wind generating set according to claim 1, wherein the RS485 module (4) comprises an RS485 bus, the tower top inclination angle sensor (1), the tower middle acceleration sensor (2), the tower base inclination angle sensor (3) and the tower base acquisition station (5) are all hung on the RS485 bus, the tower top inclination angle sensor (1), the tower middle acceleration sensor (2) and the tower base inclination angle sensor (3) serve as slave stations of the RS485 bus, and the tower base acquisition station (5) serves as a master station of the RS485 bus.
3. The intelligent safety monitoring system for the tower of the wind generating set according to claim 1 or 2, wherein the tower top inclination angle sensor (1), the tower middle acceleration sensor (2) and the tower base inclination angle sensor (3) are all double-shaft inclination angle sensors.
4. An intelligent monitoring method for safety of a tower of a wind generating set, which applies the system of claim 1, is characterized by comprising the following steps:
s1: acquiring inclination angle data by a tower top inclination angle sensor and a tower footing inclination angle sensor;
s2: an acceleration sensor in the tower collects acceleration data;
s3: the tower footing acquisition station acquires inclination angle data and acceleration data, and performs filtering and calculation processing;
s4: the upper computer analyzes the tower footing inclination angle data to obtain an uneven settlement characteristic value and a corresponding direction, analyzes the tower top inclination angle data to calculate a tower top displacement characteristic value and a corresponding direction, analyzes acceleration data in the tower to calculate a characteristic value of tower drum vibration data;
s5: the upper computer judges whether the characteristic values of the differential settlement, the tower top displacement and the tower drum vibration data exceed the warning values, if one exceeds the warning value, the S6 is entered, and if not, the S1 is returned;
s6: the system alarms and controls the wind turbine generator to stop;
the inclination angle data comprise inclination angle values in an X direction and a Y direction, and the X direction is vertical to the Y direction; the sampling frequency of the inclination angle data collected by the tower base collecting station is 100HZ, and the sampling frequency of the acceleration data collected by the tower base collecting station is 25.6 HZ; the calculation cycle of the inclination angle data is 100s, namely 1000 points are collected by the 100s inclination angle data to form a group of waveform data; the calculation period of the acceleration data is 10s, namely 256 points are collected by the acceleration data 10s to form a set of waveform data.
5. The intelligent monitoring method for the safety of the tower of the wind generating set according to claim 4, wherein the S3 comprises the following steps:
s31: the tower footing acquisition station monitors the inclination angle data of the tower footing and calculates the synthetic angle and the direction angle of the inclination angle data, analyzes the uneven settlement of the foundation and the corresponding direction, stores the data in a disk, acquires the inclination angle data of the tower footing, calculates the synthetic angle and the direction angle of the inclination angle data, analyzes the displacement of the tower footing and the corresponding direction, and stores the data in a disk;
s32: and the tower base acquisition station monitors acceleration data and performs data processing.
6. The intelligent monitoring method for the safety of the tower of the wind generating set according to claim 5, wherein the S31 comprises the following steps:
s311: judging whether the sampling period reaches 100S, if so, entering S312, otherwise, entering S312 after data acquisition;
s312: resetting a sampling timer;
s313: calculating a composite angle and a direction angle of the inclination angle data;
s314: calculating the characteristic value of the data in the period;
s315: the tower footing acquisition station stores the waveform data and the characteristic value data in a disk;
s316: and sending all the data to an upper computer.
7. The intelligent monitoring method for the safety of the tower of the wind generating set according to claim 6, wherein the calculation mode of the synthetic angle of S313 is as follows:
the tower base inclination angle sensor and the tower top inclination angle sensor obtained by the tower base acquisition station acquire the composite angle α of the inclination angle values in the x direction and the y direction and the relation is that tan2α＝tan2x+tan2y
A resultant angle can be obtained
The azimuth angle θ is calculated as follows:
calculating the effective value of the waveform as one waveform period per 100s
Where N is the number of sample points for one waveform period, αiStoring the effective value and the original waveform data in a disk for each synthetic angle;
the positive value of the output angle of the x axis points to the north, and the azimuth angle is 0 degree; the negative value of the output angle of the x axis points to the south, and the azimuth angle is 180 degrees; the positive value of the output angle of the y axis points to the east, and the azimuth angle is 90 degrees; the negative y-axis output angle points west with an azimuth of 270.
8. The intelligent monitoring method for the safety of the tower of the wind generating set according to claim 5, wherein the S32 comprises the following steps:
s321: judging whether the width of the sliding window reaches 10S for the first time, if so, entering S322, otherwise, storing the acquired data into a cache and repeating S321;
s322: judging whether the cache is looped, if so, entering S323, otherwise, directly intercepting the acceleration data of the latest 10S in the cache and then entering S324;
s323: respectively intercepting the latest 10s of acceleration data from the tail part and the head part of the cache, and splicing the acceleration data of the tail part and the head part;
s324: storing the intercepted/spliced acceleration data into a sliding window for caching;
s325: calculating an effective value, a peak-to-peak value and a peak value of acceleration data in a sliding window;
s326: the tower footing acquisition station stores the effective value, the peak-to-peak value and the peak value of the acceleration data into a cache;
s327: the tower base acquisition station sends all data to the next module and returns to S322.
9. The intelligent monitoring method for the safety of the tower of the wind generating set according to claim 8, wherein the acceleration data in the S325 is divided into two directions of X and Y, and the signal directly acquired by the tower base acquisition station is axAnd Ay，
The acceleration is synthesized and then the acceleration is synthesized,
the calculation method is to calculate the maximum value, the minimum value, the peak-to-peak value and the effective value of the latest 10s256 points of the synthesized acceleration in a rolling manner by taking the sampling period as the calculation period.
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