CN112049761A - Method and device for monitoring opening and closing degree of longitudinal flange of split tower of wind generating set - Google Patents

Abstract

The invention discloses a method and a device for monitoring the opening and closing degree of longitudinal flanges of a piece-type tower of a wind power generator group, comprising a plurality of towers, a plurality of longitudinal flanges, a plurality of bolts and a plurality of measuring components. Lan carries out multiple sets of strain acquisition and installation, and builds the system, and then calibrates the test signal to obtain two sets of shutdown threshold extreme values and two sets of operating threshold extreme values; The mean value is compared and accumulated with the corresponding extreme value of the shutdown threshold and the extreme value of the operating threshold, and at the same time, it is judged whether the data is abnormal, and all the calculated data are displayed; and based on the load data and the working conditions of the unit, determine whether In case of extreme working conditions or sensor failure, and taking corresponding measures, it can effectively monitor the connection status of longitudinal flanges for a long time, and can also automatically generate early warning signals to give early warning of hidden dangers.

Description

Method and device for monitoring the opening and closing degree of longitudinal flanges of sectional towers of wind turbines

technical field

The invention relates to the technical field of longitudinal flange monitoring of a segmented tower, in particular to a method and a device for monitoring the opening and closing degree of longitudinal flanges of a segmented tower of a wind turbine.

Background technique

With the continuous development of society, the demand for energy continues to increase. As an important clean and renewable energy, wind energy has been greatly developed all over the world, and the proportion of wind power generation is also increasing. , has gradually become a conventional energy source. With the development of wind power technology, ultra-high towers have become a trend. As the support structure of the unit, the tower is subjected to increasing loads. In order to meet the requirements of safe operation of the unit and reduce the material cost as much as possible, the design diameter of the tower needs to be increased, and the traditional large-diameter tower is difficult to transport. The segmented tower solves the problem of difficult transportation, and also avoids the vortex street effect by changing the structure of the tower, which is one of the directions of tower design for super large units in the future.

The segmented tower generally has multiple longitudinal flanges, and each longitudinal flange has a large number of connecting bolts. The loosening and fracture of the bolts will affect the tower load and vibration, thus causing risks to the operation of the unit. It is very necessary to monitor the condition of the longitudinal flange of the segmented tower, but it is currently impossible to carry out effective long-term monitoring of the segmented flange with a large number of bolts.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method and a device for monitoring the opening and closing degree of the longitudinal flange of the fragmented tower of the wind turbine group, which can effectively monitor the fragmented flange for a long time.

In order to achieve the above purpose, in the first aspect, the present invention provides a method for monitoring the opening and closing degree of longitudinal flanges of a fragmented tower of a wind turbine group, including:

Perform multiple sets of strain collection and installation on the longitudinal flange under test, and carry out system construction;

The test signal is calibrated, and two sets of shutdown threshold extreme values and two sets of running threshold extreme values are obtained;

Collecting operating data, and comparing and accumulating the generated two sets of shutdown values and test mean values with the corresponding extreme shutdown threshold values and the extreme operating threshold values;

Determine whether the data is abnormal, and display all the calculated data;

Based on the load data and unit operating conditions, determine whether extreme operating conditions or sensor failures occur, and take corresponding measures.

Among them, multiple sets of strain collection and installation are carried out on the measured longitudinal flange, and the system is constructed, including:

A plurality of strain gauges are used to assemble the test fixtures, and three test fixtures are installed corresponding to the three installation positions of the longitudinal flange under test, and the fourth strain gauge is installed at the set position of the tower, wherein , the three installation positions are respectively the first installation position at 30% of the number of bolts from the first edge of the longitudinal flange to be measured, and the second installation position at 50% of the number of bolts from the first edge of the longitudinal flange to be measured. The installation position, the third installation position at 70% of the number of bolts from the first edge of the longitudinal flange under test.

Wherein, collecting operation data, and comparing and accumulating the generated two sets of shutdown values and test mean values with the corresponding extreme values of the shutdown threshold and the extreme value of the operating threshold, including:

Taking ten minutes as the file length, store the data collected by the installed strain gauge in the industrial computer, calculate the test average value, and judge the status word at the same time to obtain the first shutdown value and the second shutdown value.

Wherein, collecting the operation data, and comparing and accumulating the generated two sets of shutdown values and test mean values with the corresponding extreme values of the shutdown threshold and the extreme value of the operating threshold, further including:

If the first shutdown value is greater than 1.05 times the extreme value of the first shutdown threshold, generate a first shutdown over-limit value, and at the same time count as 1, and accumulate;

If the second shutdown value is less than 1.05 times the extreme value of the second shutdown threshold value, a second shutdown over-limit value is generated, counted as 1 at the same time, and accumulated.

Wherein, collecting the operation data, and comparing and accumulating the generated two sets of shutdown values and test mean values with the corresponding extreme values of the shutdown threshold and the extreme value of the operating threshold, further including:

If the test mean value is greater than 1.05 times the extreme value of the first operating threshold, generate the first operating over-limit value, and at the same time count as 1, and accumulate;

If the test mean value is less than 1.05 times the extreme value of the second operating threshold, a second operating excess value is generated, which is simultaneously counted as 1 and accumulated.

Among them, determine whether the data is abnormal, and display all the calculated data, including:

If each calculated over-limit value is greater than 0 at the same time or a single over-limit value is greater than 4, the abnormal warning status light will change from green to red, and all data and all data calculated based on the collected operating data will be displayed. The abnormal warning status lights are displayed on the monitoring interface, and the signals are transmitted in the form of emails and text messages.

In a second aspect, the present invention provides a device for monitoring the opening and closing degree of longitudinal flanges of a fragmented tower of a wind turbine group. The device for monitoring the opening and closing degree of longitudinal flanges of a fragmented tower of a wind turbine group includes a plurality of A longitudinal flange, a plurality of bolts and a plurality of measuring assemblies, the plurality of the longitudinal flanges are respectively fixedly connected with the plurality of the towers, and are located at the joints of the plurality of the towers, and the plurality of the bolts are connected with the plurality of the towers. The longitudinal flange is detachably connected and penetrates through a plurality of the longitudinal flanges, and a plurality of the measuring assemblies are fixedly connected with the plurality of the longitudinal flanges and are located on a side away from the tower;

A plurality of the measurement components all include a U-shaped bracket, a strain gauge layer and two butterfly screws. The strain gauge layer is fixedly connected to the U-shaped bracket and is located on one side of the U-shaped bracket. The bracket has two threaded holes, the two threaded holes pass through the U-shaped bracket, and the two thumb screws are detachably connected to the U-shaped bracket and are located in the threaded holes.

The strain gauge layer includes a strain acquisition module, a signal calibration module, a main acquisition module and an early warning module, the signal calibration module is connected to the strain acquisition module, and the main acquisition module is connected to the strain acquisition module and the strain acquisition module. The signal calibration module is connected, and the early warning module is connected with the main acquisition module;

The strain acquisition module is used to monitor the data, and transmit the collected data to the main acquisition module with a file length of ten minutes;

The signal calibration module is used for calibrating the test signal to obtain two sets of shutdown threshold extremes and two sets of running threshold extremes;

The main collection module is used for receiving the data collected by the strain collection module, and simultaneously counting and accumulating two sets of shutdown over-limits and two sets of running over-limits obtained according to the two sets of shutdown values and the test mean value;

The early-warning module is configured to perform corresponding early-warning according to the accumulated situation of the main collection module, and simultaneously take corresponding early-warning operations.

Wherein, the strain gauge layer further includes a signal anti-surge module, and the signal anti-surge module is connected with the strain acquisition module;

The signal anti-surge module is used for inputting stable data to the strain acquisition module.

Wherein, the monitoring device for the longitudinal flange opening and closing degree of the fragmented tower of the wind turbine group further includes an industrial computer and a router, the industrial computer is connected to the main acquisition module and the early warning module, and the router is connected to the industrial computer. machine connection;

The industrial computer is used to display all the data calculated by the main collection module and the early warning information of the early warning module;

The router is used to remotely transmit the data and early warning information displayed by the industrial computer.

The invention provides a method and device for monitoring the longitudinal flange opening and closing degree of a sectional tower of a wind power generator group. Flange, multiple bolts and multiple measurement components are used to collect and install multiple sets of strains on the longitudinal flange under test, and build the system, and then calibrate the test signal to obtain two sets of shutdown threshold extremes and two sets of operating threshold extremes Then collect the running data, and compare and accumulate the two sets of shutdown values and test mean values generated with the corresponding shutdown threshold extreme value and the operating threshold extreme value, and judge whether the data is abnormal at the same time, and calculate the obtained value. All data are displayed; and based on the load data and unit operating conditions, it is judged whether extreme operating conditions or sensor failures occur, and corresponding measures are taken, which can effectively monitor the connection status of longitudinal flanges for a long time.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of steps of a method for monitoring the opening and closing degree of longitudinal flanges of a fragmented tower of a wind turbine group provided by the present invention.

FIG. 2 is a system frame diagram of the construction provided by the present invention.

FIG. 3 is a flow chart of data judgment provided by the present invention.

4 is a schematic structural diagram of a device for monitoring the opening and closing degree of longitudinal flanges of a fragmented tower of a wind turbine group provided by the present invention.

FIG. 5 is a schematic structural diagram of the measurement assembly provided by the present invention.

6 is a schematic diagram of circuit connection of the monitoring device for the longitudinal flange opening and closing degree of the fragmented tower of the wind turbine group provided by the present invention.

1-Tower, 2-Longitudinal flange, 3-Bolt, 4-Measurement assembly, 5-U-shaped bracket, 6-Strain gauge layer, 7-Wing screw, 8-Threaded hole, 9-Strain acquisition module, 10 -Signal calibration module, 11-main acquisition module, 12-early warning module, 13-signal anti-surge module, 14-industrial computer, 15-router, 16-buffer pad.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than An indication or implication that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, is not to be construed as a limitation of the invention. In addition, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

Please refer to FIG. 1 to FIG. 3 , the present invention provides a method for monitoring the opening and closing degree of longitudinal flanges of a fragmented tower of a wind turbine group, including:

S101. Perform multiple sets of strain collection and installation on the measured longitudinal flange 2, and perform system construction.

Specifically, a U-shaped bracket 5 is used first, and a set of strain gauges are attached to the inner and outer faces at the center of the beam of the bracket. In order to avoid the influence of temperature on the test, the two sensitive grids of the strain gauge need to be arranged vertically. Symmetrically drill threaded holes 8 and penetrate the butterfly screws 7 to seal and protect the strain gauge, and complete the assembly of the test tool.

Then select the longitudinal flange 2 to be tested, obtain the number of bolts 3 used, and select three measuring points to install and fix the test tool. 30% of the number of bolts of 3 on the edge or upper edge, 30% of the number of bolts of 3 from the lower edge of the flange, and 50% of the number of bolts of 3 from the upper and lower flanges. Each measuring tool gets a continuous strain ε. According to the IEC61400-13 load test standard, four strain gauges are pasted at the set position of the corresponding tower 1, and the phase between the strain gauges is 90°, and the bending moments of the tower 1 in the MX and MY directions are measured. Simultaneously transmit and collect analog quantities such as cabin wind speed, cabin position, cabin wind direction, active power, and rotational speed, as well as status signals such as shutdown, standby, running, power limit, yaw release, lubricating and refueling.

A strain acquisition module 9 is placed on the platform at each test position, wherein the strain acquisition module uses a sampling frequency of 50Hz for sampling, uses the full-bridge acquisition method to acquire the signal of the strain gauge on the test tool, and adds a signal to the front end of the acquisition module. The signal anti-surge module 13 collects stably; the main acquisition module 11 is placed on the bottom platform of the tower, and the data of each platform strain acquisition module 9 is received through the CANOPEN communication protocol, and the main acquisition module 11 collects the strain signals in the 1MX and MY directions of the tower; A computer is placed next to the main acquisition module 11, the computer uses the TCP/IP communication protocol to access the main collector, controls it to start or stop acquisition through software, and stores the data in the local hard disk; place a switch and a 4G router next to the industrial computer 14 15. Connect the computer with the unit ring network, the unit PLC, and the external network through the network cable, so as to realize the functions of collecting the unit PLC data, allowing remote access to the central monitoring of the power station and remote access to the external network, as shown in the schematic diagram 2 of the test system.

The power supply of each subsystem is selected from the 230V terminal of the tower 1 lamp lighting, which can provide uninterrupted power supply. The acquisition unit only performs the acquisition and transmission functions, and the main collector performs the storage function. The data generates a collection file every ten minutes. Stored on the industrial computer 14, the industrial computer 14 is connected to the Internet through the 4G router 15, the local data is automatically uploaded to the cloud, and the test data is regularly cleaned to ensure that the storage space meets the ability of sustainable collection; the monitoring software is run on the industrial computer 14, and step 5 The variables in are displayed for a long time, and the generated log files are stored locally for a long time. The user can remotely connect the industrial computer 14 through the 4G network to monitor the test results in real time, or monitor the test results in the central control room through the fan ring network, or connect the computer in the central control room to the ring network instead of the industrial computer 14 .

S102 , calibrating the test signal to obtain two sets of extreme values of shutdown thresholds and two sets of extreme values of running thresholds.

Specifically, after the sensor installation is completed, the calibration work is carried out, and the unit is yawed for one circle in the forward and reverse directions. The obtained waveform is averaged and recorded as offset, and the offset is used to correct the waveform to obtain a new continuous variable ε ₁ , by the following formula Calculation: ε ₁ =ε-offset. The average value of the peak value is taken from the waveform of the revised new variable ε ₁ , which is called "the maximum value of the shutdown threshold", that is, the extreme value of the first shutdown threshold. “minimum value”, that is, the second shutdown threshold extreme value; collect the operating conditions of the unit for 10 days (must include full engine conditions.), take the maximum value, which is called “operating threshold maximum value”, that is, the first operating threshold extreme value , and the minimum value is called the "minimum operating threshold", that is, the second extreme value of the operating threshold.

S103: Collect operating data, and compare and accumulate the two sets of generated shutdown values and test mean values with the corresponding extreme shutdown threshold values and the extreme operating threshold values.

Specifically, as shown in FIG. 3, use the installed strain gauges to start collection, carry out real-time data monitoring, and store the tested data in the industrial computer 14 located at the bottom of the tower with a file length of ten minutes; then use the data processing software Read in the file and program, perform data processing, calculate the ten-minute average value of ε, record it as "test average", and judge the status word at the same time, intercept the data whose shutdown and yaw decoupling status words are both 1, Or the data whose status words of shutdown and lubricating and refueling are both 1, find the maximum and minimum values, and record them as "maximum shutdown value" and "minimum shutdown value", which are the first shutdown value and the second shutdown value; if "stop maximum value" value" is greater than 1.05 times the "stop threshold maximum value", then generate "stop maximum value overrun", that is, the first shutdown overrun limit, and count as 1 at the same time, and accumulate; if the "stop minimum value" is less than 1.05 times "Stop threshold minimum value", then generate "Stop minimum value overrun", that is, the second stopover limit value, which is counted as 1 at the same time, and accumulated; if the "test mean" is greater than 1.05 times the "running threshold maximum value", Then generate "running maximum value overrun", that is, the first running overrun limit, at the same time count as 1, and accumulate; if the "test mean" is less than 1.05 times the "running threshold minimum value", generate "running minimum value exceeding "Limit", that is, the second running over-limit value, which is counted as 1 at the same time and accumulated.

S104, determine whether the data is abnormal, and display all the calculated data.

Specifically, if each calculated over-limit value is greater than 0 at the same time or a single over-limit value is greater than 4, the abnormal warning status light will change from green to red, and all the calculated values based on the collected operating data will be The data and the abnormal warning status lights are displayed on the monitoring interface, and the signals are transmitted in the form of emails and text messages at the same time, namely "stop maximum value", "stop minimum value", "stop threshold maximum value", "test mean value" , "Running Threshold Min.", "Running Threshold Max.", "Stopping Min. Exceeding", "Stopping Max. Exceeding", "Running Max. Exceeding", "Running Min. Exceeding", "Abnormal Warning" ” status lights are displayed on the monitoring interface, and signals are sent to individuals via email and text messages.

Among them, the judgment method of abnormal warning is:

Based on the method in the IEC61400-13 load test standard, the bending moments in the MX and MY directions corresponding to tower 1 are obtained, and the test results are statistically analyzed to obtain the scatter diagram of the ten-minute average value and the average wind speed. Whether the bending moment is discrete when the "abnormal warning" occurs. At the same time, Fourier transform is performed on the ten-minute data to determine whether there is abnormal frequency. Combined with the test results of the flange opening and closing degree, the change trend of the sequence number and the vibration frequency are compared, and it is analyzed that the opening and closing degree exceeding the threshold is due to the special working conditions of the unit. If there is no abnormality in the load of the tower 1, but the change trend of the flange opening and closing degree is inconsistent, it means that the flange opening and closing degree changes irregularly at this time.

S105 , based on the load data and the working conditions of the unit, determine whether an extreme working condition or a sensor failure occurs, and take corresponding measures.

Specifically, when the "abnormal warning" status light turns red, it is necessary to intercept the data whose exceeding limit is not equal to one, and combine the load of synchronous tower 1 and the working condition of the unit to determine whether the extreme working condition of the unit causes the opening and closing degree to exceed the limit, and according to The timing results of the measured ε ₁ are analyzed to determine whether it is caused by the looseness of the sensor. After the above reasons are eliminated, it is necessary to climb the tower to check the situation of bolts 3 near the measuring point.

Referring to FIG. 4 , the present invention provides a device for monitoring the opening and closing degree of longitudinal flanges of a fragmented tower of a wind turbine group. The device for monitoring the opening and closing degree of longitudinal flanges 2 of a fragmented tower of a wind turbine group includes a plurality of towers 1 , a plurality of longitudinal flanges 2, a plurality of bolts 3 and a plurality of measurement assemblies 4, the plurality of the longitudinal flanges 2 are respectively fixedly connected with the plurality of the towers 1, and are located at the connection of the plurality of the towers 1 , a plurality of the bolts 3 are detachably connected to a plurality of the longitudinal flanges 2, and pass through the plurality of the longitudinal flanges 2, and the plurality of the measuring assemblies 4 are fixedly connected to the plurality of the longitudinal flanges 2, and is located away from the side of the tower 1;

The plurality of measurement assemblies 4 include a U-shaped bracket 5 , a strain gauge layer 6 and two butterfly screws 7 . The strain gauge layer 6 is fixedly connected to the U-shaped bracket 5 and is located in the U-shaped bracket 5 . On one side, the U-shaped bracket 5 has two threaded holes 8, the two threaded holes 8 pass through the U-shaped bracket 5, and the two butterfly screws 7 are detachably connected to the U-shaped bracket 5, and located in the threaded hole 8 .

In this embodiment, a plurality of the towers 1 are connected by a plurality of the longitudinal flanges 2, and the plurality of the longitudinal flanges 2 are fixed by a plurality of the bolts 3, and the plurality of Between the longitudinal flanges 2, a gasket can be added to fill and seal the gaps between the plurality of the towers 1, so as to ensure the tight connection between the plurality of the towers 1. One of the measuring components is installed at 30% of the number of bolts 3 on the upper edge of the longitudinal flange 2, 30% of the number of bolts 3 from the lower edge of the longitudinal flange 2, and 250% of the number of bolts from the upper and lower longitudinal flanges. 4. Symmetrically punch holes on the two vertical beams of the bracket and penetrate the butterfly bolts 3. As shown in Figure 5, use the two butterfly bolts 3 to fix the measuring assembly 4 and the longitudinal flange 2. , and apply thread tightening glue to further increase the degree of fixation between the measuring assembly 4 and the longitudinal flange 2. The U-shaped bracket 5 needs to be a right-angle rigid bracket, and the installation position of the strain gauge layer needs to be polished to ensure It is smooth; where the tooling is installed at the measuring point, it is necessary to ensure that the flange surface is flat, and a set of strain gauge layers 6 are attached to the inner and outer faces of the center of the beam of the U-shaped bracket 5. In order to avoid the influence of temperature on the test, the strain gauge layer The two sensitive grids of 6 need to be arranged vertically, and then the strain gauge layer 6 is used for monitoring.

Further, the strain gauge layer 6 includes a strain acquisition module 9 , a signal calibration module 10 , a main acquisition module 11 and an early warning module 12 , the signal calibration module 10 is connected to the strain acquisition module 9 , and the main acquisition module 11 connected with the strain collection module 9 and the signal calibration module 10, and the early warning module 12 is connected with the main collection module 11;

The strain collection module 9 is used to monitor the data, and transmit the collected data to the main collection module 11 with ten minutes as the file length;

The signal calibration module 10 is used for calibrating the test signal to obtain two sets of shutdown threshold extremes and two sets of operating threshold extremes;

The main acquisition module 11 is used for receiving the data collected by the strain acquisition module 9, and according to the two sets of shutdown values and the test mean value, two sets of shutdown over-limits and two sets of running over-limits are obtained, and simultaneously counts and accumulates. ;

The early warning module 12 is configured to perform corresponding early warning according to the accumulated situation of the main collection module 11 and take corresponding early warning operations at the same time.

In this embodiment, as shown in FIG. 6 , the strain acquisition module 9 is used to synchronously transmit and collect the wind speed of the engine room, the location of the engine room, the wind direction of the engine room, the active power, the rotational speed and other analog quantities, as well as the shutdown, standby, running, limited power, Status signals such as yaw and cable removal, lubricating and regreasing; and the main acquisition module 11 CANOPEN communication protocol receives data with ten minutes as the file length of each platform strain acquisition module 9, while the main acquisition module 11 collects the tower 1MX, The strain signal in the MY direction, and then calibrate the signal, and obtain two sets of shutdown threshold extremes and two sets of operating threshold extremes; and two sets of shutdown over-limits and two sets of running thresholds obtained according to the two sets of shutdown values and the test mean When the limit value is exceeded, counting and accumulation are performed at the same time; and when the accumulation reaches a certain level, the pre-warning module 12 is used for pre-warning, the abnormal warning state light is changed from green to red, and the connection between the sensor and the bolt 3 is carried out according to the pre-warning information. The inspection can automatically generate early warning information to give early warning to the hidden dangers, the sensor cost is low, and at the same time, the connection state of the longitudinal flange 2 can be effectively monitored for a long time.

Further, the strain gauge layer 6 further includes a signal anti-surge module 13, and the signal anti-surge module 13 is connected to the strain acquisition module 9;

The signal anti-surge module 13 is used to input stable data to the strain acquisition module 9 .

In this embodiment, the signal anti-surge module 13 is added to the front end of the strain collection module 9, so that the strain collection module 9 can stably collect data.

Further, the monitoring device for the longitudinal flange opening and closing degree of the fragmented tower of the wind turbine group also includes an industrial computer 14 and a router 15, and the industrial computer 14 is connected to the main acquisition module 11 and the early warning module 12, so The router 15 is connected to the industrial computer 14;

The industrial computer 14 is used to display all the data calculated by the main collection module 11 and the early warning information of the early warning module 12;

The router 15 is used to remotely transmit the data and early warning information displayed by the industrial computer 14 .

In this embodiment, the industrial computer 14 uses the TCP/IP communication protocol to access the main acquisition module 11, controls it to start or stop acquisition through software, and stores the data in the local hard disk; Shutdown Min", "Stop Threshold Max", "Test Mean", "Run Threshold Min", "Run Threshold Max", "Stop Min Over", "Stop Max Over", "Run Max" The status lights of "value overrun", "running minimum overrun", and "abnormal warning" are displayed on the interface; place a switch and a 4G router 15 next to the industrial computer 14, and connect the computer to the unit ring network, unit PLC, and external network through a network cable. Connect to realize the functions of collecting the PLC data of the unit, allowing remote access to the central monitoring of the power station and remote access to the external network.

Further, the measurement assembly 4 further includes a buffer pad 16 , the buffer pad 16 is fixedly connected with the U-shaped bracket 5 and is located between the U-shaped bracket 5 and the longitudinal flange 2 .

In this embodiment, since the U-shaped bracket 5 is a right-angle rigid bracket, in order to prevent the U-shaped bracket 5 from causing damage to the longitudinal flange 2 and to avoid being affected by temperature, the U-shaped bracket 5 is deformed and squeezes the longitudinal flange 2, so a buffer pad 16 is added between the U-shaped bracket 5 and the longitudinal flange 2 to protect the longitudinal flange 2 and extend the The working life of the longitudinal flange 2.

A method and device for monitoring the opening and closing degree of the longitudinal flanges of the fragmented towers of the wind turbines of the present invention, the monitoring device for monitoring the opening and closing degrees of the longitudinal flanges 2 of the fragmented towers of the wind turbines comprises a plurality of towers 1, a plurality of Longitudinal flange 2, multiple bolts 3 and multiple measurement components 4, carry out multiple sets of strain collection and installation on the measured longitudinal flange 2, and build the system, and then calibrate the test signal to obtain two sets of shutdown threshold extreme values and Two sets of operating threshold extreme values; then collect operating data, and compare and accumulate the generated two sets of shutdown values and test averages with the corresponding shutdown threshold extreme values and the operating threshold extreme values, and determine whether the data is abnormal at the same time. , and display all the calculated data; and based on the load data and unit operating conditions, determine whether extreme operating conditions or sensor failures occur, and take corresponding measures, which can effectively monitor the connection status of the longitudinal flange 2 for a long time.

The above disclosure is only a preferred embodiment of the present invention, and of course, it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand that all or part of the process for realizing the above-mentioned embodiment can be realized according to the rights of the present invention. The equivalent changes required by the invention still belong to the scope covered by the invention.

Claims (10)

1. a method for monitoring the longitudinal flange opening and closing degree of a wind turbine component sheet tower, is characterized in that, comprising: Perform multiple sets of strain collection and installation on the longitudinal flange under test, and carry out system construction; The test signal is calibrated, and two sets of shutdown threshold extreme values and two sets of running threshold extreme values are obtained; Collecting operating data, and comparing and accumulating the generated two sets of shutdown values and test mean values with the corresponding extreme shutdown threshold values and the extreme operating threshold values; Determine whether the data is abnormal, and display all the calculated data; Based on the load data and unit operating conditions, determine whether extreme operating conditions or sensor failures occur, and take corresponding measures. 2. The method for monitoring the opening and closing degree of longitudinal flanges of a fragmented tower of a wind turbine group as claimed in claim 1, wherein multiple sets of strain collection and installation are performed on the measured longitudinal flanges, and system construction is performed, comprising: A plurality of strain gauges are used to assemble the test fixtures, and three test fixtures are installed corresponding to the three installation positions of the longitudinal flange under test, and the fourth strain gauge is installed at the set position of the tower, wherein , the three installation positions are respectively the first installation position at 30% of the number of bolts from the first edge of the longitudinal flange to be measured, and the second installation position at 50% of the number of bolts from the first edge of the longitudinal flange to be measured. The installation position, the third installation position at 70% of the number of bolts from the first edge of the longitudinal flange under test. 3 . The method for monitoring the longitudinal flange opening and closing degree of a sharded tower of a wind turbine group according to claim 1 , wherein the operation data is collected, and the two groups of shutdown values and test mean values generated are compared with the corresponding shutdown values. 4 . The threshold extrema and the operating threshold extremum are compared and accumulated, including: Taking ten minutes as the file length, store the data collected by the installed strain gauge in the industrial computer, calculate the test average value, and judge the status word at the same time to obtain the first shutdown value and the second shutdown value. 4. The method for monitoring the longitudinal flange opening and closing degree of a sharded tower of a wind turbine group according to claim 3, wherein the operation data is collected, and the generated two groups of shutdown values and test mean values are compared with the corresponding shutdown values. The threshold extremum and the operating threshold extremum are compared and accumulated, and further includes: If the first shutdown value is greater than 1.05 times the extreme value of the first shutdown threshold, generate a first shutdown over-limit value, and at the same time count as 1, and accumulate; If the second shutdown value is less than 1.05 times the extreme value of the second shutdown threshold value, a second shutdown over-limit value is generated, counted as 1 at the same time, and accumulated. 5 . The method for monitoring the longitudinal flange opening and closing degree of a sharded tower of a wind turbine group according to claim 3 , wherein the operation data is collected, and the generated two groups of shutdown values and test mean values are compared with the corresponding shutdown values. 6 . The threshold extremum and the operating threshold extremum are compared and accumulated, and further includes: If the test mean value is greater than 1.05 times the extreme value of the first operating threshold, generate the first operating over-limit value, and at the same time count as 1, and accumulate; If the test mean value is less than 1.05 times the extreme value of the second operating threshold, a second operating excess value is generated, which is simultaneously counted as 1 and accumulated. 6. The method for monitoring the longitudinal flange opening and closing degree of the fragmented tower of a wind turbine group as claimed in claim 1, wherein the judgment data is abnormal, and all the calculated data are displayed, including: If each calculated over-limit value is greater than 0 at the same time or a single over-limit value is greater than 4, the abnormal warning status light will change from green to red, and all data and all data calculated based on the collected operating data will be The abnormal warning status lights are displayed on the monitoring interface, and the signals are transmitted in the form of emails and text messages. 7. A device for monitoring the opening and closing degree of longitudinal flanges of a sheet-type tower of a wind turbine group, characterized in that, The monitoring device for the longitudinal flange opening and closing degree of the fragmented tower of the wind turbine group includes a plurality of towers, a plurality of longitudinal flanges, a plurality of bolts and a plurality of measuring components, and the plurality of the longitudinal flanges are respectively connected with the plurality of The towers are fixedly connected and located at a plurality of the tower connections, a plurality of the bolts are detachably connected to the plurality of the longitudinal flanges, and pass through the plurality of the longitudinal flanges, and a plurality of the measurement assemblies fixedly connected with a plurality of the longitudinal flanges, and located on the side away from the tower; A plurality of the measurement components all include a U-shaped bracket, a strain gauge layer and two butterfly screws. The strain gauge layer is fixedly connected to the U-shaped bracket and is located on one side of the U-shaped bracket. The bracket has two threaded holes, the two threaded holes pass through the U-shaped bracket, and the two thumb screws are detachably connected to the U-shaped bracket and are located in the threaded holes. 8. The monitoring device for the longitudinal flange opening and closing degree of the fragmented tower of a wind turbine group according to claim 7, characterized in that, The strain gauge layer includes a strain acquisition module, a signal calibration module, a main acquisition module and an early warning module, the signal calibration module is connected to the strain acquisition module, and the main acquisition module is connected to the strain acquisition module and the signal calibration module. module connection, the early warning module is connected with the main collection module; The strain acquisition module is used to monitor the data, and transmit the collected data to the main acquisition module with a file length of ten minutes; The signal calibration module is used for calibrating the test signal to obtain two sets of shutdown threshold extremes and two sets of running threshold extremes; The main collection module is used for receiving the data collected by the strain collection module, and simultaneously counting and accumulating two sets of shutdown over-limits and two sets of running over-limits obtained according to the two sets of shutdown values and the test mean value; The early-warning module is configured to perform corresponding early-warning according to the accumulated situation of the main collection module, and simultaneously take corresponding early-warning operations. 9 . The monitoring device for the longitudinal flange opening and closing degree of the fragmented tower of a wind turbine group according to claim 8 , wherein: 10 . The strain gauge layer further includes a signal anti-surge module, and the signal anti-surge module is connected to the strain acquisition module; The signal anti-surge module is used for inputting stable data to the strain acquisition module. 10. The device for monitoring the opening and closing degree of longitudinal flanges of a fragmented tower of a wind turbine group according to claim 8, characterized in that: The monitoring device for the longitudinal flange opening and closing degree of the fragmented tower of the wind turbine group further includes an industrial computer and a router, the industrial computer is connected to the main acquisition module and the early warning module, and the router is connected to the industrial computer. ; The industrial computer is used to display all the data calculated by the main collection module and the early warning information of the early warning module; The router is used to remotely transmit the data and early warning information displayed by the industrial computer.

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