CN217331227U - Strain insulator string wind-induced vibration on-line monitoring system - Google Patents
Strain insulator string wind-induced vibration on-line monitoring system Download PDFInfo
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- CN217331227U CN217331227U CN202220208456.7U CN202220208456U CN217331227U CN 217331227 U CN217331227 U CN 217331227U CN 202220208456 U CN202220208456 U CN 202220208456U CN 217331227 U CN217331227 U CN 217331227U
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Abstract
The utility model discloses an on-line monitoring system for wind-induced vibration of a strain insulator string, which comprises an on-line monitoring device and a background processing system; the online monitoring device comprises an acquisition module, a processing module, a storage module, a communication module and an energy storage module; the acquisition module comprises a high-frequency camera, a temperature and humidity sensor, a wind speed sensor, a wind direction sensor, a rainfall sensor and a strain sensor; collecting vibration state image data and environment data of the strain insulator string, performing signal processing on the vibration state image data and the environment data, storing the processed data in a storage module, and uploading the processed data to a background processing system through a communication module; and the background processing system reads data to evaluate the wind-induced vibration state of the strain insulator string. The utility model discloses realize the on-line monitoring of strain insulator string vibration state, solved that traditional cycle patrols and examines that long, the human cost is high, the reliability hangs down the scheduling problem.
Description
Technical Field
The utility model relates to a transmission line disaster prevention and reduction technical field, concretely relates to strain insulator string wind-induced vibration on-line monitoring system.
Background
In order to solve the problems of primary energy shortage and unbalanced distribution in China, an extra-high voltage power grid is developed, and implementation of 'east transmission of west electricity' and 'south transmission of north electricity' is an important strategy for energy development in China. At present, the length of 22 ultrahigh voltage engineering lines of a national power grid under construction reaches 3.2 kilometers, and because an ultrahigh voltage transmission line has a wide crossing area and a long mileage, the climatic conditions of the route area are complicated and changeable, and the operating conditions of the lines in some areas are very strict, hardware wind-induced vibration caused by continuous wind excitation is one of important factors influencing the safe operation of the lines.
The design of the strain insulator string hardware fitting of the ultra-high voltage direct current transmission line only focuses on the mechanical strength design and the electrical characteristic design, the dynamic design is ignored, the long-term wind-induced vibration can cause the fatigue damage of a welding line, the hardware fitting is seriously bent, and the like, and the safe operation of the line is threatened. Meanwhile, the existing online monitoring method for the ultra-high voltage transmission line cannot effectively reflect the vibration state of the strain insulator string, so that the strain insulator string with fatigue defects cannot be found in time, and the electric power production accident caused by wind-induced vibration damage of hardware fittings is difficult to effectively avoid.
In view of this kind of demand, the utility model provides a strain insulator string wind-induced vibration on-line monitoring system.
SUMMERY OF THE UTILITY MODEL
For solving the not enough of existence among the prior art, the utility model aims to provide a strain insulator string wind-induced vibration on-line monitoring system.
The utility model adopts the following technical proposal.
A strain insulator string wind-induced vibration online monitoring system comprises an online monitoring device and a background processing system;
the online monitoring device comprises an acquisition module, a processing module, a storage module, a communication module and an energy storage module;
the acquisition module acquires vibration state image data and environment data of the strain insulator string, transmits the vibration state image data and the environment data to the processing module for signal processing, stores the processed data in the storage module, and uploads the processed data to the background processing system through the communication module; the energy storage module supplies power to each module;
the background processing system reads vibration state image data and environment data of the strain insulator string, processes the vibration state image, and extracts vibration characteristic information under the current environment, wherein the vibration characteristic information comprises vibration frequency and vibration amplitude; and comparing the critical vibration amplitude with the critical vibration amplitude of the corresponding frequency under the current environment to evaluate the wind-induced vibration state of the strain insulator string.
Furthermore, the acquisition module comprises a high-frequency camera, a temperature and humidity sensor, a wind speed sensor, a wind direction sensor, a rainfall sensor and a strain gauge sensor; the high-frequency camera is used for shooting vibration state images of the strain insulator string in real time, the temperature and humidity sensor is used for monitoring the ambient temperature and humidity in real time, the wind speed sensor is used for monitoring the ambient wind speed in real time, the wind direction sensor is used for monitoring the ambient wind direction in real time, the rainfall sensor is used for monitoring the ambient rainfall in real time, and the strain gauge sensor is used for monitoring the stress of the insulator string in real time.
Further, the processing module comprises a signal processing unit for carrying out signal processing on the acquired vibration state image data and the environmental data of the strain insulator string.
Further, the storage module comprises a data storage unit for temporarily storing the image data and the environment data processed by the processing module; the data storage unit is a high-speed random access memory or a nonvolatile memory.
Furthermore, the communication module comprises an interdigital transducer which is used for establishing contact with a background processing system to realize remote data reading;
the background processing system regularly transmits a radio frequency query signal with a certain frequency through a reader, and the interdigital transducer reads data from the data storage unit after receiving the radio frequency query signal, converts an electric signal into an acoustic surface wave signal and transmits the acoustic surface wave signal; and after receiving the fed back surface acoustic wave signals, the reader performs sound-electricity conversion and transmits the obtained electric signals to the background processing system.
Further, the inquiry and feedback signals adopt full duplex communication channels that do not interfere with each other.
Furthermore, the appearance of the on-line monitoring device is in a similar spherical streamline shape.
Further, the frequency of the high-frame camera is 2 times greater than the vibration frequency of the insulator string structure.
Further, the energy storage module adopts solar energy and lithium battery to jointly supply power.
The beneficial effects of the utility model reside in that, compared with the prior art, the utility model discloses a whole monitoring devices appearance is the spheroidal streamlined, and because the high-frequency ripple wind carries the effect to arouse monitoring facilities self vibration error when reducing the device and be located the monitoring on the shaft tower.
The utility model discloses an on-line monitoring system has advantages such as data collection is convenient, computational accuracy height, need not personnel and goes to the site survey, can solve artifical line patrol efficiency not high, the inconvenient problem of remote area field patrol well.
The utility model discloses realize the on-line monitoring of special high tension transmission line strain insulator string vibration state, solved that traditional cycle patrols and examines that long, the human cost is high, the reliability is low scheduling problem, in time discover to have the strain insulator string of vibration defect, guarantee high tension transmission line's safety and stability operation.
Drawings
FIG. 1 is a schematic view of the strain insulator string wind-induced vibration on-line monitoring system of the present invention;
fig. 2 is the utility model discloses a strain insulator string wind-induced vibration on-line monitoring system's on-line monitoring device schematic diagram.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in FIG. 1, strain insulator string wind-induced vibration on-line monitoring system, including on-line monitoring device and backstage processing system.
Strain insulator string wind-induced vibration on-line monitoring system, including high frequency camera, temperature and humidity sensor, air velocity transducer, wind direction sensor, rain sensor, strain gauge sensor, data processing unit, data storage unit, interdigital transducer, reading ware and backstage processing system.
The high-frequency camera, the temperature and humidity sensor, the wind speed sensor, the wind direction sensor, the rainfall sensor, the strain sensor, the data processing unit, the data storage unit and the interdigital transducer form a line monitoring device.
The high-frequency camera is used for shooting the vibration state of the strain insulator string in real time, the temperature and humidity sensor is used for monitoring the ambient temperature and humidity in real time, the wind speed sensor is used for monitoring the ambient wind speed in real time, the wind direction sensor is used for monitoring the ambient wind direction in real time, the rainfall sensor is used for monitoring the ambient rainfall in real time, and the strain gauge sensor is used for monitoring the stress of the insulator string in real time. All the detected quantities can reflect the vibration state and the health degree of the strain insulator string under the current environmental factors.
And the monitoring data of the high-frequency camera and the sensor are transmitted to the signal processing unit for processing and then are stored in the data storage unit. The reader regularly transmits a radio frequency query signal with a certain frequency for querying the real-time monitoring data of the front end. After receiving a radio frequency query signal sent by the rear end, the interdigital transducer reads monitoring data from the data storage unit and converts an electric signal into a surface acoustic wave to be emitted, so that interference of a strong electromagnetic environment on data transmission is avoided. And after receiving the surface acoustic wave signal fed back from the front end, the reader performs acoustic-electric conversion on the echo signal and transmits the obtained electric signal to a background processing system. The background processing system can analyze the signals, so that the real-time vibration state of the strain insulator string is obtained.
As shown in figure 2, the schematic diagram of the wind-induced vibration online monitoring device for the strain insulator string of the ultra-high voltage transmission line is shown, the online monitoring device is installed on a transmission line tower, the appearance of the whole monitoring device is in a sphere-like streamline shape, and the vibration error of the monitoring device caused by the high-frequency pulsation wind load effect when the device is located on the tower for monitoring is reduced.
The whole online monitoring device comprises an acquisition module 20, a processing module 21, a storage module 22, a communication module 23 and an energy storage module 24; the modules may be connected by a bus or other means, and fig. 2 illustrates the connection by the bus as an example.
The acquisition module 20 comprises a high-frequency camera, a temperature and humidity sensor, a wind speed sensor, a wind direction sensor, a rainfall sensor and a strain gauge sensor. The frequency of the high-frame camera can be selected in various ways, on the basis of being 2 times greater than the vibration frequency of the insulator string structure, the vibration condition of the strain insulator string is shot in real time by adopting 210 frames/s, and other sensors acquire field environment indexes in real time.
The processing module 21 includes a signal processing unit, and performs signal processing on the video and the field environment information captured by the capturing module 20, including data compression, data redundancy removal, and the like.
The storage module 22 includes a data storage unit, which may include a high-speed random access memory, and may further include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage device, for temporarily storing the image data and the field environment information processed by the processing module 21.
The communication module 23 comprises an interdigital transducer, establishes contact with a background management system and realizes remote reading of monitoring data.
The energy storage module 24 is powered by a combination of solar energy and lithium battery.
A plurality of sensors and a high-frequency camera are integrated into a collection module to collect the working environment state of the current strain insulator string and the vibration condition of the strain insulator string. The collected data are processed and stored in the data storage unit for temporary storage, and reliable transmission of the signal channel is guaranteed. The acquired data information is transmitted through the interdigital transducer, the background processing system can call the information in the storage unit of the reader at any time, and the vibration characteristic quantity of the insulator string in the environment is obtained through a characteristic parameter extraction method, so that the wind-induced vibration state of the strain insulator string is evaluated.
The utility model discloses a strain insulator string wind-induced vibration on-line monitoring system's work flow:
step 1, acquiring the working environment state of the current strain insulator string and the vibration condition of the strain insulator string, processing the acquired data, and temporarily storing the processed data in a data storage unit to ensure the reliable transmission of a signal channel;
step 2, the background management system sends out radio frequency signals to the front-end online monitoring device, requires to read the relevant environment and strain insulator string vibration information in the data storage unit, and adopts a full-duplex communication channel to ensure that the access and return signals are not interfered with each other;
step 3, carrying out strain insulator string vibration video image processing;
in cloudy days, rain, fog and other conditions, the shot image has the problems of blurring, distortion and the like, so image preprocessing is required, including five links of image conversion, image filtering, image enhancement, image segmentation and image defogging.
Step 4, extracting and evaluating vibration characteristic information of the strain insulator string;
intercepting each frame of image of the video, enabling the intercepted image to contain a local image of an edge and a neighborhood thereof in the vibration direction of the strain insulator string, and determining the position of the edge pixel by performing forward differential processing on the gray value of a certain column of pixels in the intercepted image to obtain an array A. And the extreme value or the maximum value in the extreme value is used as the edge of the pixel position structure, the video recording time is combined to form a pixel time sequence group P, and after the direct current component is removed, the time-frequency domain conversion is carried out, namely, the Fourier transform is carried out to obtain the vibration frequency.
Finally, the real object image is subjected to proportional conversion through the imaging principle, and the real object image is subjected to proportional conversion through the reference edge n AB Corresponding to the reference photographed image n CD And strain insulator string shooting image
Calculating vibration amplitude
As shown in the formula.
The vibration amplitude and the frequency of the strain insulator string at the moment can be extracted.
And comparing the acquired vibration frequency and amplitude with the critical vibration amplitude of the corresponding frequency under the current environmental factors, and evaluating whether the strain insulator string is damaged due to fatigue defects.
The beneficial effects of the utility model reside in that, compared with the prior art, the utility model discloses a whole monitoring devices appearance is the spheroidal streamlined, and because the high-frequency ripple wind carries the effect to arouse monitoring facilities self vibration error when reducing the device and be located the monitoring on the shaft tower.
The utility model discloses an on-line monitoring system has advantages such as data collection is convenient, computational accuracy height, need not personnel and goes to the site survey, can solve artifical line patrol efficiency not high well, the inconvenient problem of remote area site patrol.
The utility model discloses realize the on-line monitoring of special high tension transmission line strain insulator string vibration state, solved that traditional cycle patrols and examines that long, the human cost is high, the reliability is low scheduling problem, in time discover to have the strain insulator string of vibration defect, guarantee high tension transmission line's safety and stability operation.
The applicant of the present invention has made detailed description and description of the embodiments of the present invention with reference to the drawings, but those skilled in the art should understand that the above embodiments are only the preferred embodiments of the present invention, and the detailed description is only for helping the reader to better understand the spirit of the present invention, and not for the limitation of the protection scope of the present invention, on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the protection scope of the present invention.
Claims (9)
1. The strain insulator string wind-induced vibration online monitoring system is characterized by comprising an online monitoring device and a background processing system;
the online monitoring device comprises an acquisition module, a processing module, a storage module, a communication module and an energy storage module;
the acquisition module acquires vibration state image data and environment data of the strain insulator string, transmits the vibration state image data and the environment data to the processing module for signal processing, stores the processed data in the storage module, and uploads the processed data to the background processing system through the communication module; the energy storage module supplies power to each module;
the background processing system reads vibration state image data and environment data of the strain insulator string, processes the vibration state image, and extracts vibration characteristic information under the current environment, wherein the vibration characteristic information comprises vibration frequency and vibration amplitude; and comparing the obtained vibration amplitude with the critical vibration amplitude of the corresponding frequency in the current environment to evaluate the wind-induced vibration state of the strain insulator string.
2. The strain insulator string wind-induced vibration on-line monitoring system of claim 1,
the acquisition module comprises a high-frequency camera, a temperature and humidity sensor, a wind speed sensor, a wind direction sensor, a rainfall sensor and a strain sensor; the high-frequency camera is used for shooting vibration state images of the strain insulator string in real time, the temperature and humidity sensor is used for monitoring the ambient temperature and humidity in real time, the wind speed sensor is used for monitoring the ambient wind speed in real time, the wind direction sensor is used for monitoring the ambient wind direction in real time, the rainfall sensor is used for monitoring the ambient rainfall in real time, and the strain gauge sensor is used for monitoring the stress of the insulator string in real time.
3. The strain insulator string wind-induced vibration on-line monitoring system of claim 1,
the processing module comprises a signal processing unit for processing the acquired vibration state image data and the environmental data of the strain insulator string.
4. The strain insulator string wind-induced vibration on-line monitoring system of claim 1,
the storage module comprises a data storage unit for temporarily storing the image data and the environment data processed by the processing module; the data storage unit is a high-speed random access memory or a nonvolatile memory.
5. The strain insulator string wind-induced vibration on-line monitoring system of claim 1,
the communication module comprises an interdigital transducer and is used for establishing contact with the background processing system to realize remote data reading;
the background processing system regularly transmits a radio frequency query signal with a certain frequency through a reader, and the interdigital transducer reads data from the data storage unit after receiving the radio frequency query signal and converts an electric signal into an acoustic surface wave signal to be transmitted; and after receiving the fed back surface acoustic wave signals, the reader performs sound-electricity conversion and transmits the obtained electric signals to a background processing system.
6. The on-line strain insulator string wind-induced vibration monitoring system of claim 5,
the inquiry and feedback signals adopt full duplex communication channels which do not interfere with each other.
7. The strain insulator string wind-induced vibration on-line monitoring system of claim 1,
the online monitoring device is in a similar spherical streamline shape.
8. The strain insulator string wind-induced vibration on-line monitoring system of claim 2,
the frequency of the high-frame camera is 2 times greater than the vibration frequency of the insulator string structure.
9. The strain insulator string wind-induced vibration on-line monitoring system of claim 1,
the energy storage module adopts solar energy and lithium battery to jointly supply power.
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| CN202220208456.7U CN217331227U (en) | 2022-01-21 | 2022-01-21 | Strain insulator string wind-induced vibration on-line monitoring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114353880A (en) * | 2022-01-21 | 2022-04-15 | 国网河南省电力公司电力科学研究院 | Strain insulator string wind-induced vibration online monitoring system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114353880A (en) * | 2022-01-21 | 2022-04-15 | 国网河南省电力公司电力科学研究院 | Strain insulator string wind-induced vibration online monitoring system and method |
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