Power transmission line temperature-vibration integrated monitoring device and system

Abstract

The utility model belongs to the field of power transmission line state monitoring, and discloses a power transmission line temperature-vibration integrated monitoring device and system, and the device comprises a housing, and a lead temperature monitoring unit and a vibration monitoring unit based on a fiber bragg grating. The shell is clamped on a power transmission line, and the wire temperature monitoring unit and the vibration monitoring unit based on the fiber bragg grating are both arranged in the shell and used for monitoring the temperature and the vibration frequency of the power transmission line. According to the utility model, the fiber bragg grating sensor is used, a fiber bragg grating is used as a sensitive element, the fiber bragg grating sensor has the advantages of being passive, free of electromagnetic interference and the like, monitoring signals are transmitted back through the OPGW, the communication reliability and safety are high, and the fiber bragg grating sensor is suitable for ultra-high-voltage and ultra-high-voltage transmission lines which need to run in the field for a long time or are located in areas without public network signals and areas with severe field environments. The method is especially suitable for state monitoring by using a fiber grating sensing technology.

Description

Technical Field

[0001] The utility model belongs to the field of power transmission line status monitoring, and particularly relates to a power transmission line temperature-vibration integrated monitoring device and system. Background Art

[0002] In power transmission lines, transmission conductors often generate wind-induced vibrations. Among them, breeze vibrations are characterized by high frequency, small amplitude, and long duration, while dancing vibrations are characterized by low frequency and large amplitude. Therefore, monitoring the high-frequency and low-frequency vibrations of conductors is a key way to obtain information on the operating status of conductors. At the same time, the temperature of the conductor is an important parameter that reflects the current carrying capacity and sag, and is also the focus of transmission line status monitoring.

[0003] In current engineering applications, breeze vibration and dancing monitoring devices are independently designed and installed, and are mainly electronic sensors. Existing conductor temperature monitoring sensors are mostly wireless contact electronic temperature measurement, installed at the end of the conductor. The above-mentioned monitoring devices are usually powered by a combination of batteries and solar energy, and the power supply reliability may be insufficient for long-term operation; moreover, after being installed on the conductor, they must withstand long-term interference from a strong electromagnetic environment, and the sensor components must be specially designed to resist electromagnetic interference. In addition, for monitoring devices located in areas without public network signals, the reliability of data transmission is seriously challenged.

[0004] With previous technologies, many sensors need to be installed on the wires, but too many sensors will increase the workload, make management difficult, and complicate maintenance. Utility Model Content

[0005] The utility model aims to provide a transmission line temperature-vibration integrated monitoring device and system to solve the problems of insufficient power supply reliability and poor anti-electromagnetic interference capability in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, the utility model provides a transmission line temperature-vibration integrated monitoring device, including a shell, a conductor temperature monitoring unit based on fiber grating, and a vibration monitoring unit; the shell is clamped on the transmission line, and the conductor temperature monitoring unit based on fiber grating and the vibration monitoring unit are both arranged in the shell, for monitoring the temperature and vibration frequency of the transmission line.

[0008] Furthermore, the fiber Bragg grating-based conductor temperature monitoring unit is a fiber Bragg grating-based temperature sensor, and the temperature sensor is installed in a housing and in contact with the transmission line.

[0009] Furthermore, the fiber Bragg grating-based vibration monitoring unit includes a fiber Bragg grating-based low-frequency vibration sensor and a fiber Bragg grating-based high-frequency vibration sensor; the fiber Bragg grating-based low-frequency vibration sensor and the fiber Bragg grating-based high-frequency vibration sensor are both arranged inside the shell and are respectively located on both sides of the transmission line.

[0010] Furthermore, the shell includes an upper shell and a lower shell, and the upper shell and the lower shell are buckled and connected to each other, and a transmission line slot is preset at the connection point.

[0011] Furthermore, one end of the upper shell and the lower shell are connected by a pin shaft.

[0012] Furthermore, the upper shell and the lower shell are solid shells, and mounting positions for the conductor temperature monitoring unit and the vibration monitoring unit based on the fiber grating are arranged on the interlocking surfaces.

[0013] Furthermore, anti-slip textures are provided on the transmission line clamping slot.

[0014] In the second aspect, the utility model provides a transmission line temperature-vibration integrated monitoring system, including an insulator, a connecting optical fiber, an optical fiber joint box, an OPGW optical cable and a demodulator; the transmission line temperature-vibration integrated monitoring device is fused with the optical fiber led out of the insulator, the insulator and the connecting optical fiber are connected to the optical fiber joint box, and the optical fiber joint box transmits the information to the demodulator located in the substation through the OPGW.

[0015] Furthermore, the insulator adopts a composite insulator with an optical fiber channel reserved inside, and the optical fiber joint box is installed on the pole tower.

[0016] Compared with the prior art, the utility model has the following technical effects:

[0017] The utility model uses a fiber grating sensor, which takes the fiber grating as the sensitive element, and has the advantages of being passive and not subject to electromagnetic interference. The monitoring signal is transmitted back through the OPGW, and the communication reliability and security are relatively high. It is particularly suitable for using fiber grating sensing technology to monitor the status of ultra-high voltage and extra-high voltage transmission lines that need to operate in the field for a long time or are in areas without public network signals and in areas with harsh field environments.

[0018] The utility model adopts a fiber grating sensor to transmit temperature and vibration information through optical signals, avoiding the influence of the electromagnetic environment on the sensor and achieving high-reliability data transmission. At the same time, since the fiber grating sensing unit does not need on-site power supply, it is directly connected to the demodulator installed in the substation through optical fiber, avoiding the problem of insufficient power supply reliability in long-term operation in previous solutions. The fiber grating sensor used at the same time has a long service life and a low failure rate, reducing maintenance requirements and costs.

[0019] The device combines vibration sensors and temperature sensors to monitor the vibration and temperature of the conductors at the same time. A single fiber grating sensor can monitor multiple physical quantities, reducing the number and complexity of equipment. Multifunctional integration makes the device more compact, reducing installation space and installation costs. The overall structure is simple, reliable, and easy to disassemble and assemble, which realizes accurate, reliable, and real-time monitoring of the temperature and vibration of the transmission line, providing a strong guarantee for the safe and stable operation of the power system.

[0020] The problem that traditional electrical sensors are susceptible to electromagnetic interference has been solved. At the same time, fiber grating sensors use optical signals for data transmission and do not require on-site power supply, thus avoiding the problem of insufficient power supply reliability during long-term operation. Fiber grating sensors also have a long service life and stable performance, and can operate stably for a long time in harsh environments, which not only reduces maintenance costs, but also improves the overall reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation structure of the utility model.

[0022] Figure 2 This is a schematic diagram of the structure of the temperature-vibration integrated monitoring device of the utility model.

[0023] in:

[0024] 1- conductor; 2- insulator; 3- temperature-vibration integrated monitoring device; 4- connecting optical fiber; 5- junction box; 6- OPGW optical cable; 7- demodulator; 8- upper shell; 9- high-frequency vibration sensor; 10- temperature sensor; 11- low-frequency vibration sensor; 12- pin shaft; 13- transmission line slot; 14- lower shell. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] For examples, see Figure 2 A transmission line temperature-vibration integrated monitoring device comprises a shell, a conductor temperature monitoring unit based on fiber grating and a vibration monitoring unit; the shell is clamped on the transmission line, and the conductor temperature monitoring unit based on fiber grating and the vibration monitoring unit are both arranged in the shell to monitor the temperature and vibration frequency of the transmission line.

[0029] The utility model uses a fiber grating sensor, which takes the fiber grating as the sensitive element, and has the advantages of being passive and not subject to electromagnetic interference. The monitoring signal is transmitted back through the OPGW, and the communication reliability and security are relatively high. It is particularly suitable for using fiber grating sensing technology to monitor the status of ultra-high voltage and extra-high voltage transmission lines that need to operate in the field for a long time or are in areas without public network signals and in areas with harsh field environments.

[0030] Embodiment 2, the utility model provides a transmission line temperature-vibration integrated monitoring device, which is composed of a shell, a vibration sensor, and a temperature sensor. The shell is composed of an upper shell 1 and a lower shell 7. The upper shell 1 can rotate around the shell pin 5 to realize the opening and closing of the device and clamp the wire. When working, the device is clamped on the wire. As the wire vibrates, the vibration frequency of the wire is monitored by the low-frequency vibration sensor 4 and the high-frequency vibration sensor 2 based on the fiber grating. The use of two vibration sensors can ensure that the vibration frequency range of the wire is covered. Among them, the low-frequency vibration sensor 4 and the high-frequency vibration sensor 2 are similar in structure, but there are differences in the thickness and length of the cantilever beam.

[0031] A temperature sensor 3 is installed at the position closest to the conductor of the device, which is in contact with the conductor to be measured, and is used to sense the temperature change of the conductor and form an optical signal. The unit uses a fiber grating sensor unit as a conductor temperature monitoring unit, which can realize real-time monitoring of the conductor temperature. The device has an ordinary cube appearance, simple structure, small and light, safe and reliable.

[0032] The utility model monitors the temperature and vibration of the conductor. Since the fiber grating sensor has the characteristics of anti-electromagnetic interference, the device can work stably in a strong electromagnetic field environment, solving the problem that traditional electrical sensors are easily affected by electromagnetic interference. At the same time, the fiber grating sensor uses optical signals for data transmission and does not require on-site power supply, avoiding the problem of insufficient power supply reliability during long-term operation. The fiber grating sensor also has a long service life and stable performance, and can operate stably for a long time in harsh environments, which not only reduces maintenance costs, but also improves the overall reliability of the system.

[0033] The temperature-vibration integrated monitoring device can simultaneously monitor the temperature and vibration status of the transmission line in real time by integrating the conductor temperature monitoring unit and vibration monitoring unit based on fiber Bragg grating. It does not require complex installation structures and space requirements. It can monitor multiple data through a single fiber Bragg grating sensor, reducing the number and complexity of equipment. In addition, the system transmits optical signals through OPGW, avoiding the influence of the electromagnetic environment on the sensor, and realizing passive measurement of monitoring information, further simplifying the structure and operation of the system.

[0034] Example 3, taking a 220KV transmission line as an example, conventional conductor temperature and vibration monitoring is usually divided into two instruments, which need to be clamped separately, which is troublesome to operate, and the clamping of the instrument is easy to loosen, resulting in poor reliability.

[0035] The utility model combines the vibration sensor with the temperature sensor, adds shell protection, fixation and clamping, and can monitor the vibration frequency and temperature of the wire quickly, stably and reliably.

[0036] The outer shell is composed of an upper outer shell 9 and a lower outer shell 14. The upper outer shell 8 can rotate around the outer shell pin 12 to realize the opening and closing of the device and clamp the wire. When working, the device is clamped on the wire. As the wire vibrates, the vibration frequency of the wire is monitored by the low-frequency vibration sensor 10 and the high-frequency vibration sensor 9 on the left and right sides. The use of two vibration sensors can ensure that the vibration frequency range of the wire is covered. A temperature sensor 10 is installed at the position of the device closest to the wire to realize real-time monitoring of the wire temperature. The device has the appearance of an ordinary cube, with a simple structure, small and light, safe and reliable.

[0037] Embodiment 4, a transmission line temperature-vibration integrated monitoring system, comprising a transmission line temperature-vibration integrated monitoring device, an insulator 2, a connecting optical fiber 4, an optical fiber joint box 5, an OPGW optical cable 6 and a demodulator 7; the transmission line temperature-vibration integrated monitoring device is fused with the optical fiber led out of the insulator 2, the insulator 2 and the connecting optical fiber 4 are connected to the optical fiber joint box 5, and the optical fiber joint box 5 is transmitted to the demodulator 7 located in the substation through the OPGW 6.

[0038] The insulator 2 is a composite insulator with an optical fiber channel reserved inside, and the optical fiber joint box 5 is installed on the tower.

[0039] Vibration sensors and temperature sensors use fiber grating sensing technology to achieve integrated monitoring of transmission line temperature and vibration, improving the accuracy and reliability of monitoring. The device integrates temperature monitoring and vibration monitoring functions in the same device, simplifying the installation and maintenance process and reducing costs. The conductor temperature monitoring unit and the vibration detection unit are integrated into a design, and the insulator 2 uses a composite insulator with an internal reserved optical fiber channel. After the optical fiber led out of the monitoring unit and the insulator 2 is fused, it enters the optical fiber joint box 5 on the pole tower through the insulator 2 and the connecting optical fiber 4, and then is transmitted to the demodulator 7 located in the substation through the OPGW 6, and the demodulator 7 demodulates the signal.

[0040] Working principle:

[0041] Clamp the housing on the transmission line so that the transmission line is clamped in the transmission line clamping slot, and the transmission line and the temperature monitoring unit are in contact after the housing is buckled;

[0042] The vibration frequency of the conductor is collected by low-frequency vibration sensors and high-frequency vibration sensors based on fiber gratings. The temperature information of the transmission line is collected by temperature sensors based on fiber gratings.

[0043] The collected vibration data and temperature information are transmitted via OPGW optical cable to the demodulator, which demodulates the signal to achieve real-time monitoring.

[0044] The utility model integrates temperature and vibration monitoring functions, and the method can obtain the status information of the power transmission line in real time. Once an abnormal temperature rise or vibration frequency is detected, the system can immediately issue an early warning to remind the operation and maintenance personnel to take timely measures to avoid potential safety accidents.

[0045] The utility model combines a low-frequency vibration sensor with a high-frequency vibration sensor to achieve full coverage collection of the wire vibration frequency. This design can capture vibration signals in different frequency ranges and improve the accuracy and comprehensiveness of monitoring.

[0046] The fiber Bragg grating-based temperature sensor of the utility model has high measurement accuracy and stability, and can accurately reflect the temperature changes of the transmission line. This is of great significance for preventing problems such as line aging and equipment damage caused by excessive temperature.

[0047] The utility model adopts OPGW optical cable for data transmission, which has the advantages of strong anti-interference ability, long transmission distance, large bandwidth, etc. This ensures the accuracy and real-time nature of the monitoring data and improves the reliability of the system.

[0048] The utility model clamps the housing on the transmission line so that the transmission line is clamped in the transmission line clamping slot. After the housing is buckled, the transmission line and the temperature monitoring unit are in contact. This design simplifies the installation process and reduces maintenance costs. At the same time, due to the use of advanced technologies such as fiber grating sensors and OPGW optical cables, the maintenance of the system is more convenient.

[0049] Through the real-time monitoring and early warning functions, the utility model enables operation and maintenance personnel to timely discover and handle line problems, reducing the number of inspections and fault handling time, which helps to improve operation and maintenance efficiency and reduce operation and maintenance costs.

[0050] In summary, the integrated temperature-vibration monitoring method for transmission lines has the technical effects of real-time monitoring and early warning, full-frequency vibration monitoring, high-precision temperature monitoring, high-reliability data transmission, easy installation and maintenance, improved operation and maintenance efficiency, and promotion of smart grid development.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A transmission line temperature-vibration integrated monitoring device, characterized in that: It includes a shell, a conductor temperature monitoring unit based on fiber grating and a vibration monitoring unit; the shell is clamped on the transmission line, and the conductor temperature monitoring unit based on fiber grating and the vibration monitoring unit are both arranged in the shell to monitor the temperature and vibration frequency of the transmission line.

2. A transmission line temperature-vibration integrated monitoring device according to claim 1, characterized in that: The fiber Bragg grating-based conductor temperature monitoring unit is a fiber Bragg grating-based temperature sensor (10). The temperature sensor (10) is installed in a housing and is in contact with a transmission line.

3. A transmission line temperature-vibration integrated monitoring device according to claim 1, characterized in that: The fiber Bragg grating-based vibration monitoring unit comprises a fiber Bragg grating-based low-frequency vibration sensor (11) and a fiber Bragg grating-based high-frequency vibration sensor (9); the fiber Bragg grating-based low-frequency vibration sensor (11) and the fiber Bragg grating-based high-frequency vibration sensor (9) are both arranged inside a housing and are respectively located on both sides of a transmission line.

4. A transmission line temperature-vibration integrated monitoring device according to claim 1, characterized in that: The shell comprises an upper shell (8) and a lower shell (14). The upper shell (8) and the lower shell (14) are buckled and butted against each other, and a transmission line slot (13) is preset at the butt joint.

5. A transmission line temperature-vibration integrated monitoring device according to claim 4, characterized in that: One end of the upper shell (8) and the lower shell (14) are connected via a pin shaft.

6. A transmission line temperature-vibration integrated monitoring device according to claim 4, characterized in that: The upper shell (8) and the lower shell (14) are solid shells, and mounting positions for a conductor temperature monitoring unit and a vibration monitoring unit based on optical fiber gratings are arranged on the interlocking surfaces.

7. A transmission line temperature-vibration integrated monitoring device according to claim 4, characterized in that: The power transmission line clamping slot (13) is provided with anti-skid patterns.

8. A transmission line temperature-vibration integrated monitoring system, characterized in that: The integrated temperature-vibration monitoring device for transmission lines according to any one of claims 1 to 7 comprises an insulator (2), a connecting optical fiber (4), an optical fiber junction box (5), an OPGW optical cable (6) and a demodulator (7); the integrated temperature-vibration monitoring device for transmission lines is fused with the optical fiber led out of the insulator (2), the insulator (2) and the connecting optical fiber (4) are connected to the optical fiber junction box (5), and the optical fiber junction box (5) is transmitted to the demodulator (7) located in the substation through the OPGW (6).

9. A transmission line temperature-vibration integrated monitoring system according to claim 8, characterized in that: The insulator (2) is a composite insulator with an optical fiber channel reserved inside.

10. A transmission line temperature-vibration integrated monitoring system according to claim 8, characterized in that: The optical fiber splice box (5) is installed on the pole tower.

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