Power transmission line galloping on-line monitoring device and method based on electromagnetic induction

Abstract

The invention relates to the technical field of power transmission line galloping monitoring, and provides a power transmission line galloping on-line monitoring device and method based on electromagnetic induction, and the device comprises a hollow cylindrical housing, the end face of the cylindrical housing is provided with an insulating partition plate, and the side wall of the cylindrical housing is provided with a conductor; the cylindrical shell is arranged on a power transmission line wire along the axis in a penetrating mode. A resistor is electrically connected between the cylindrical shell and the power transmission line wire, and two ends of the resistor are connected with a voltage detection device. According to the invention, by arranging the monitoring device with the conductive cylindrical shell, the detection of capacitance based on electromagnetic induction and the measurement of converting the vibration amplitude of galloping into the voltage value can be realized, the galloping condition of the power transmission line can be accurately monitored in real time, and the problems of low accuracy and the like in the existing galloping monitoring are solved.

Description

Technical Field

[0001] The present invention relates to the technical field related to power transmission line galloping monitoring, and in particular to a power transmission line galloping online monitoring device and method based on electromagnetic induction. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The galloping of transmission lines is a common power system operation fault, which seriously affects the safe and stable operation of the power system. Galloping is a self-excited vibration with a vibration frequency of about 0.1-3Hz and a large vibration amplitude, which can reach 5-300 times the diameter of the conductor. The formation of galloping is mainly affected by meteorological factors, line direction and line structure. Galloping poses a great safety hazard to transmission lines. The galloping of transmission lines can cause problems such as wear, breakage and cracks of transmission line conductors, reducing the service life of the conductors. Long-term galloping can also cause loosening, wear and falling of the connection components of the line tower, and even pole and tower collapse accidents; galloping failures can cause line tripping, power plant shutdown and even large-scale power outages.

[0004] The early means of monitoring the galloping of transmission lines mainly rely on regular manual observation of the environmental information and galloping of the lines, which cannot reflect the operating status of the transmission lines in real time, and the monitoring results are not accurate enough. With the rapid development of computer technology and sensors, the ability to monitor the galloping of lines online has also been greatly improved. The commonly used online monitoring technologies for galloping mainly include computer simulation, video image processing and sensor technology. Computer simulation technology uses computer software to simulate the corresponding environmental parameters to calculate and simulate the galloping process of the transmission line, so as to obtain parameter information reflecting the galloping changes. This technology has low cost and high efficiency, but this technology is limited to the theoretical level and has large errors. It needs to be combined with actual application scenarios to achieve better monitoring effects. Video image processing technology is to install high-definition cameras on the towers near the line to collect video or image information of the transmission line in real time, and analyze and process it to determine whether the transmission line is galloping. This technology can determine whether the transmission line is galloping, but it cannot achieve quantitative analysis of the galloping, and the image acquisition equipment is easily affected by bad weather. Sensor technology often adopts fiber optic sensor technology and acceleration sensor. The existing sensors only measure at a single point, that is, feedback the sensor signal of the set position. It is necessary to install more sensors on the transmission line. The equipment cost is high, the power supply of multiple devices is cumbersome, and the sensors are easily affected by bad weather. Summary of the invention

[0005] In order to solve the above-mentioned problem, the present invention proposes an online monitoring device and method for power line dancing based on electromagnetic induction. An online monitoring device for power line dancing is designed based on electromagnetic induction, which can realize real-time monitoring of power line dancing. The monitoring device has high sensitivity to dancing, which greatly reduces the number of device settings and improves the accuracy of dancing identification while realizing quantitative analysis.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: One or more embodiments provide an electromagnetic induction-based transmission line sway online monitoring device, comprising a hollow cylindrical shell, the end surface of the cylindrical shell being provided as an insulating partition, and the side wall of the cylindrical shell being provided as a conductor; the cylindrical shell being provided along its axis through the transmission line conductor; A resistor is electrically connected between the side wall of the cylindrical shell and the transmission line conductor, and voltage detection devices are connected to both ends of the resistor; Electromagnetic induction is generated between the side wall of the cylindrical shell and the transmission line conductor, which in turn generates an induced electromotive force and an induced current on the resistor. The voltage on the resistor is measured by a voltage detection device to determine the size of the induced current, judge the distance change between the transmission line conductors, and monitor the dancing of the line.

[0007] One or more embodiments provide a method for online monitoring of power line dancing based on the above-mentioned electromagnetic induction-based online monitoring device, comprising the following steps: Turning on the above-mentioned transmission line dancing online monitoring device based on electromagnetic induction; According to the set sampling frequency, the voltage value collected by the voltage detection device is obtained; Determine the minimum spacing D1 between transmission line conductors and calculate the voltage threshold; When the measured voltage value exceeds the voltage threshold range, an alarm message is issued.

[0008] Compared with the prior art, the present invention has the following beneficial effects: The present invention can detect the capacitance of electromagnetic induction by setting a monitoring device with a conductive cylindrical shell, convert the vibration amplitude of the dancing into the measurement of the voltage value, monitor the dancing of the power transmission line in real time, and directly detect the line dancing generated by the line by electromagnetic induction, thereby avoiding the problem that the traditional mechanical sensor is easily disturbed by the external environment. At the same time, the device has a simple structure and is easy to install, and does not require complex transformation of the power transmission line. In addition, since a resistor is used in conjunction with a voltage detection device, the induced voltage can be accurately measured, thereby improving the monitoring accuracy and reliability.

[0009] The advantages of the present invention and additional advantages will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their description are used to explain the present invention but do not constitute a limitation of the present invention.

[0011] Figure 1 is an idealized model for power transmission line galloping detection in Embodiment 1 of the present invention; Figure 2 1 is a schematic structural diagram of an electromagnetic induction-based online monitoring device for power transmission line galloping according to Embodiment 1 of the present invention; Figure 3 1 is a working principle diagram of an electromagnetic induction-based online monitoring device for power transmission line galloping according to Embodiment 1 of the present invention; Figure 4 It is a simplified circuit diagram of the working principle of the on-line monitoring device for power transmission line galloping based on electromagnetic induction according to Embodiment 1 of the present invention; Figure 5 is a flow chart of a dancing online monitoring method according to Embodiment 2 of the present invention; Among them, 1. cylindrical shell, 2. insulating partition, 3. transmission line conductor; DETAILED DESCRIPTION The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0013] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof. It should be noted that, in the absence of conflict, the various embodiments of the present invention and the features in the embodiments can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0014] Example 1 In the technical solutions disclosed in one or more embodiments, Figures 1 to 4 As shown, an electromagnetic induction-based transmission line dancing online monitoring device comprises a hollow cylindrical shell 1, the end surface of the cylindrical shell 1 is set as an insulating partition 2, and the side wall of the cylindrical shell 1 is set as a conductor; the cylindrical shell 1 is penetrated on the transmission line conductor 3 along its axis; A resistor R is electrically connected between the cylindrical housing 1 and the transmission line conductor, and voltage detection devices are connected to both ends of the resistor; Electromagnetic induction is generated between the conductive cylindrical shell and the transmission line conductor, which in turn generates an induced electromotive force and an induced current on the resistor. The voltage on the resistor is measured by a voltage detection device to determine the size of the induced current, judge the distance change between the transmission line conductors, and monitor the dancing of the line.

[0015] This embodiment, by setting a monitoring device of a conductive cylindrical shell, can detect the capacitance of electromagnetic induction, convert the vibration amplitude of the dancing into the measurement of the voltage value, and can monitor the dancing of the power transmission line in real time. The line dancing generated by the line is directly detected by electromagnetic induction, avoiding the problem that the traditional mechanical sensor is easily disturbed by the external environment. At the same time, the device has a simple structure and is easy to install, and does not require complex transformation of the power transmission line. In addition, due to the use of resistance and voltage detection device, the voltage measurement technology is mature and can accurately measure the induced voltage, thereby improving the monitoring accuracy and reliability.

[0016] An idealized model of line galloping is established for actual transmission lines, such as Figure 1 As shown, when the transmission line gallops, for example Figure 1 When the distance D1 between phase A and phase B changes, the coupling capacitance between phase A and phase B of the transmission line will change accordingly. When the displacement current I on the conductor is basically unchanged, it will also change accordingly. By obtaining the specific value of the current I, the capacitance value can be obtained, and thus the distance D1 between the two phases A and B can be deduced; Figure 1 The idealized model for monitoring the galloping of a transmission line established for monitoring the galloping of a line is actually not real. The monitoring device is constructed in this embodiment to solve the problem.

[0017] This embodiment designs a monitoring device based on an idealized model. The specific structure is as follows: Figure 2 As shown, the cylindrical housing 1 includes two circular insulating partitions 2 with a radius of r and a busbar with a bottom radius of r and a length of l The cylindrical side surface (or wall) is made of conductive material; a resistor R is arranged inside the cylindrical shell 1 and connected between the transmission line conductor 3 and the cylindrical shell 1, and a voltage measuring device is arranged at both ends of the resistor R.

[0018] In this embodiment Figure 2 The measurement principle of the monitoring device, such as Figure 3 As shown, the electric field effect between the high-voltage wire A and the cylindrical housing 1 is equivalent to the capacitance C1, and the electric field effect between the high-voltage wire B and the cylindrical housing 1 is equivalent to the capacitance C2; ​​the values ​​of the two capacitances are very small, Level quantity unit, when the conductor of the transmission line dances so that the distance D changes, the value of the equivalent capacitance will change, so that the voltage across the measured resistor R will change, and the voltage detection device V is used to measure the voltage across the resistor; In this embodiment, the high-voltage conductor A and the high-voltage conductor B are exemplary conductors of the transmission line conductor 3; The capacitance C1 between the high-voltage conductor A and the cylindrical housing 1 mainly depends on the nature, length, grounding condition of the transmission line conductor 3 and the medium of the surrounding environment. The capacitance C1 is related to the cross-sectional area of ​​the transmission line conductor 3 and the difference between the inner and outer diameters.

[0019] Specifically: the larger the cross-sectional area of ​​the transmission line conductor 3, the greater the capacitance; the smaller the difference between the inner and outer diameters of the transmission line conductor 3, the greater its capacitance. At the same time, the capacitance values ​​of different materials are also different. For example, the capacitance value of aluminum wire is usually slightly larger than that of copper wire. In addition, there is a proportional relationship between the length of the wire and the capacitance, that is, under the same cross-sectional area, the longer the length of the wire, the greater its capacitance value. The grounding condition also affects the capacitance. When the wire is grounded, its capacitance will increase. If the wire is not completely grounded, the capacitance may sometimes decrease. The specific capacitance value of capacitor C1 needs to consider the specific wire parameters and surrounding environmental conditions; Assume that the transmission line conductor 3 on which the monitoring device is installed is a high-voltage conductor B, and the adjacent transmission line conductor 3 of the high-voltage conductor B is a high-voltage conductor A; in practical applications, the capacitor C1 is the inductive equivalent capacitance between the surface of the cylindrical housing 1 on which the monitoring device is installed and the adjacent conductor, which can be calculated by the relevant formula, which is as follows: (1) Wherein, Q is the influencing factor coefficient, which is determined by the influencing factors such as the nature, length, grounding condition of the transmission line conductor 3 and the medium of the surrounding environment; Capacitor C1 is the capacitance C1 between the high-voltage conductor A and the cylindrical shell 1 ( / km); D is the distance between the high-voltage wire A and the cylindrical shell 1 (cm); r1 is the radius of the high-voltage wire (cm).

[0020] In dry and clear weather, the standard atmospheric pressure is 1.013×10 5 Pa, the temperature is 25 degrees, the influencing factor coefficient Q is 0.01207, and the calculation formula is:

[0021] The high-voltage wire B is the wire of the cylindrical housing 1 on which the detection device is set. The electric field effect between the high-voltage wire B and the cylindrical housing 1 is equivalent to a capacitor C2. In the actual calculation process, the capacitance value of C2 is very small, which is The impedance is large, and the capacitor C2 is regarded as an open circuit. The voltage across the resistor R is calculated using the following formula: (2) Among them, U is the voltage measured by the voltage detection device, R is the resistance value of the resistor R, is the angular frequency of 314 rad / s corresponding to the power frequency of 50 Hz, C1 is the capacitance of the equivalent capacitor C1 between the cylindrical housing 1 and the adjacent high-voltage wire A, It is the effective value of the line voltage between two high-voltage conductors.

[0022] The resistance R follows the line voltage When the voltage U is known, the capacitance of capacitor C1 can be calculated by formula (2). Then, when the radius of the high-voltage wire is r1 and the capacitance C1 is known, the distance D between the high-voltage wire A and the cylindrical housing 1 can be calculated according to formula (1).

[0023] When the high-voltage wires dance, the distance between the wires decreases, C1 increases, and the voltage U increases.

[0024] Furthermore, a voltage threshold is set, and when the voltage measured by the voltage detection device is greater than the set voltage threshold, it is determined that the line galloping situation is serious and an alarm signal is issued; In a possible implementation, the resistor R may be a metal oxide film resistor, a wire wound resistor or a metal film resistor; preferably, the resistor R may be a metal film resistor; Among them, the metal oxide film resistor is a layer of metal oxide, such as tin oxide, deposited on a ceramic substrate; the metal film resistor is a layer of metal film, such as nickel-chromium alloy or tantalum nitride, deposited on a ceramic substrate; High-precision metal film resistors have a low temperature coefficient and high precision. They can provide a stable resistance value when the voltage changes due to the power line dancing, thereby improving the accuracy of the detection signal. By using high-precision metal film resistors, the detection accuracy of the monitoring device can be significantly improved, and the dancing of the power line can be more accurately reflected, effectively avoiding the occurrence of false alarms or missed alarms.

[0025] In a possible implementation, the voltage detection device may include a voltage sensor and a signal processing module, the voltage sensor is used to detect the voltage across the resistor, and the signal processing module is used to convert the detected voltage signal into an electrical parameter that can be used for monitoring; The voltage sensor converts the voltage change across the resistor R into an analog signal. The signal processing module receives and processes the signal and converts it into electrical parameters such as voltage amplitude and frequency that are easy to monitor and analyze to provide reliable monitoring data. The signal processing module can be connected to the monitoring terminal on the ground via wire or wirelessly, so as to further improve the data processing capability of the device through the monitoring terminal.

[0026] In a possible implementation, the cylindrical side wall of the cylindrical housing 1 is made of a conductive material, which may be copper or aluminum, to ensure good electrical conductivity and corrosion resistance; Copper and aluminum both have good electrical conductivity and corrosion resistance, so choosing these two materials as the conductor material of the cylindrical shell helps to ensure the electrical performance and physical stability of the device during long-term use; thereby ensuring that the device can still work normally in harsh environments and reducing the frequency of maintenance and replacement.

[0027] Furthermore, the outer surface of the cylindrical shell 1 may be provided with a protective coating, and the protective coating may be an epoxy resin coating or a ceramic coating, to prevent the cylindrical shell 1 from being damaged due to environmental factors; The protective coating can isolate the conductor material from the corrosive effects of the external environment and prevent the intrusion of moisture, salt spray or other corrosive substances, thereby protecting the overall structure of the device; it can effectively extend the life of the device, reduce performance degradation caused by environmental factors, and reduce the maintenance cost of the device.

[0028] In some embodiments, the insulating spacer 2 may be made of ceramic material, polytetrafluoroethylene or epoxy resin to provide good electrical insulation performance.

[0029] Using ceramic material as the insulating partition 2 can effectively block the current conduction between the cylindrical shell and the wire, ensuring the electrical safety of the device.

[0030] In some embodiments, the cylindrical shell 1 is passed through the transmission line conductor 3 along its axis. The axis of the cylindrical shell 1 is the center of the two insulating partitions 2. Through holes are set at the centers of the two insulating partitions 2. The power transmission line conductor 3 is penetrated through the through holes. The insulating partition 2 is fixed to the transmission line conductor 3 by setting a fixed structure.

[0031] In a specific embodiment, the fixing structure includes an elastic buckle and an anti-skid pad, and the anti-skid pad and the elastic buckle are sequentially arranged on the outer sides of the insulating partitions at both ends of the cylindrical housing 1; the elastic buckle is fixedly arranged on the transmission line conductor; Specifically, the elastic buckle can wrap the transmission line conductor through elastic force and can be stably fixed on the conductor 3 of the transmission line. The anti-slip gasket can make the elastic buckle fit tightly with the insulating partition, thereby preventing the cylindrical shell 1 from sliding on the conductor 3.

[0032] The elastic buckle design can flexibly adapt to the diameter of the wire and tightly wrap the wire through its elastic properties, while the anti-slip pad further enhances the stability of the fixed structure to prevent displacement or falling off due to dancing or external forces. At the same time, the anti-slip pad is made of insulating material and will not affect the electrical performance of the wire.

[0033] In another possible implementation, the fixing structure includes a mounting ring, which is integrally formed with the insulating partition 2 on the cylindrical shell 1, and each mounting ring is provided with an anti-slip lining on the inner side. The mounting ring is fixed to the transmission line conductor 3 by bolts or snaps.

[0034] The design of the mounting ring is tightly integrated with the cylindrical housing 1 through an integral molding method to ensure the stability of the structure. The anti-slip lining on the inside enhances the contact firmness with the wire and prevents the device from sliding or rotating. The device is fixed by bolts or buckles, which simplifies the installation process of the device and ensures the reliability of the installation.

[0035] The monitoring device of this embodiment monitors the conductor galloping by detecting the voltage value, and has high detection accuracy. Theoretically, a set of monitoring devices can be set between two towers to detect the line galloping between the two towers, which greatly reduces the number of monitoring devices to be set.

[0036] Example 2 Based on Example 1, this embodiment provides a method for monitoring the online dancing of a power transmission line based on the electromagnetic induction-based online monitoring device for the dancing of a power transmission line described in Example 1, such as Figure 2 As shown, the following steps are included: Step 1: start the electromagnetic induction-based online monitoring device for power transmission line vibration described in Example 1; Step 2: Obtain the voltage value collected by the voltage detection device according to the set sampling frequency; Step 3, determining the minimum spacing D1 between the transmission line conductors 3, and calculating the voltage threshold; Step 4: When the measured voltage value exceeds the voltage threshold range, an alarm message is issued; To set the voltage threshold in step 3, it is necessary to first measure the stray capacitance of the transmission line when it is working normally, and conduct a test measurement according to the specific situation, draw a fitting curve between the capacitance value of the stray capacitance and the distance between the transmission lines, so as to determine the minimum value of the distance D1 between the transmission lines, and determine the voltage threshold according to the minimum allowable distance D1; Further, the minimum distance D between the cylindrical housing of the online monitoring device and the adjacent transmission line conductor 3 is calculated according to the minimum distance D1; the corresponding capacitance C1 is calculated according to the minimum distance D, using formula (1); the voltage threshold of the corresponding measurement voltage U is calculated according to the capacitance C1, using formula (2); The calculation formula of capacitor C1 is as follows: (1) Wherein, Q is the influencing factor coefficient, which is determined by the influencing factors such as the nature, length, grounding condition of the transmission line conductor 3 and the medium of the surrounding environment; Capacitor C1 is the capacitance C1 between the high-voltage conductor A and the cylindrical shell 1 ( / km); D is the distance between the high-voltage wire A and the cylindrical shell 1 (cm); r1 is the radius of the high-voltage wire (cm).

[0037] In dry and clear weather, the standard atmospheric pressure is 1.013×10 5 Pa, the temperature is 25 degrees, the influencing factor coefficient Q is 0.01207, and the calculation formula is:

[0038] The high-voltage wire B is a wire with a cylindrical housing 1. The electric field effect between the high-voltage wire B and the cylindrical housing 1 is equivalent to a capacitor C2. In the actual calculation process, the capacitance of C2 is very small, which is The impedance is large, and the capacitor C2 is regarded as an open circuit. The voltage across the resistor R is calculated using the following formula: (2) Among them, U is the voltage measured by the voltage detection device, R is the resistance value of the resistor R, is the angular frequency of 314 rad / s corresponding to the power frequency of 50 Hz, C1 is the capacitance of the equivalent capacitor C1 between the cylindrical housing 1 and the adjacent high-voltage wire A, It is the effective value of the line voltage between two high-voltage conductors.

[0039] If the voltage collected by the voltage collection device V exceeds the set voltage threshold, the device will immediately alarm and call professionals for emergency repairs; if the collected voltage is lower than the set voltage threshold, it will be collected again after a period of time, judged, and the above process will be repeated.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An online monitoring device for transmission line galloping based on electromagnetic induction, characterized in that: It comprises a hollow cylindrical shell, the end surface of the cylindrical shell is set as an insulating partition, and the side wall of the cylindrical shell is set as a conductor; the cylindrical shell is passed through the transmission line conductor along its axis; a resistor is electrically connected between the side wall of the cylindrical shell and the transmission line conductor, and the two ends of the resistor are connected to a voltage detection device; Electromagnetic induction is generated between the side wall of the cylindrical shell and the transmission line conductor, which in turn generates an induced electromotive force and an induced current on the resistor. The voltage on the resistor is measured by a voltage detection device to determine the size of the induced current, judge the distance change between the transmission line conductors, and monitor the dancing of the line.

2. The electromagnetic induction-based online monitoring device for power transmission line galloping according to claim 1, characterized in that: The transmission line conductor on which the monitoring device is installed is the high-voltage conductor B, and the adjacent transmission line conductor of the high-voltage conductor B is the high-voltage conductor A. The inductive equivalent capacitance C1 between the cylindrical shell of the monitoring device and the high-voltage conductor B is calculated as follows: Among them, Q is the influencing factor coefficient; D is the distance between the high-voltage conductor A and the cylindrical shell; r1 is the radius of the high-voltage conductor.

3. The electromagnetic induction-based online monitoring device for power transmission line galloping as claimed in claim 2, characterized in that: The electric field effect between the high-voltage conductor B and the cylindrical housing of the monitoring device is equivalent to a capacitor C2. The capacitor C2 is regarded as an open circuit, and the relationship between the capacitor C1 and the voltage measured by the voltage detection device is determined.

4. The electromagnetic induction-based online monitoring device for power transmission line galloping as claimed in claim 3, characterized in that: The relationship between capacitor C1 and the voltage measured by the voltage detection device is as follows: Among them, U is the voltage measured by the voltage detection device, R is the resistance value of the resistor R, is the angular frequency; C1 is the capacitance value of the equivalent capacitor C1 between the cylindrical shell and the adjacent high-voltage wire A, It is the effective value of the line voltage between two high-voltage conductors.

5. The electromagnetic induction-based online monitoring device for power transmission line galloping according to claim 1, characterized in that: The resistor R is a metal oxide film resistor, a wire wound resistor or a metal film resistor.

6. The electromagnetic induction-based online monitoring device for power transmission line galloping according to claim 1, characterized in that: The voltage detection device includes a voltage sensor and a signal processing module. The voltage sensor is used to detect the voltage across the resistor, and the signal processing module is used to convert the detected voltage signal into an electrical parameter for monitoring.

7. The electromagnetic induction-based online monitoring device for power transmission line galloping according to claim 1, characterized in that: The outer surface of the cylindrical shell is provided with a protective coating, and the protective coating adopts an epoxy resin coating or a ceramic coating.

8. The electromagnetic induction-based online monitoring device for power transmission line galloping according to claim 1, characterized in that: The cylindrical shell is arranged on the transmission line conductor along its axis. Specifically, through holes are arranged at the centers of the two insulating partitions, and the insulating partitions are arranged on the transmission line conductor through the through holes. The insulating partitions are fixed on the transmission line conductor by setting a fixing structure. The fixing structure comprises an elastic buckle and an anti-skid pad. The anti-skid pad and the elastic buckle are arranged in sequence on the outer sides of the insulating partitions at both ends of the cylindrical shell; the elastic buckle is fixedly arranged on the transmission line conductor.

9. The method for online monitoring of power line dancing based on the electromagnetic induction-based online monitoring device for power line dancing according to any one of claims 1 to 8, characterized in that: The steps include: Turn on the electromagnetic induction-based online monitoring device for power transmission line galloping as described in any one of claims 1 to 8; According to the set sampling frequency, the voltage value collected by the voltage detection device is obtained; Determine the minimum spacing D1 between transmission line conductors and calculate the voltage threshold; When the measured voltage value exceeds the voltage threshold range, an alarm message is issued.

10. The dancing online monitoring method according to claim 9, characterized in that: The voltage threshold setting method includes the following steps: Determine the stray capacitance of the transmission line when it is working normally, and determine the minimum value of the transmission line spacing D1 based on the fitting curve between the capacitance value of the stray capacitance and the transmission line spacing; According to the minimum spacing D1, the minimum spacing D between the cylindrical shell and the adjacent transmission line conductor is calculated; The corresponding capacitance C1 is calculated according to the minimum spacing D, where the capacitance C1 is the equivalent capacitance between the cylindrical shell and the adjacent transmission line conductor; According to the calculated value of the capacitor C1, the voltage threshold of the corresponding measurement voltage U is calculated; the calculation formula is: Among them, U is the voltage measured by the voltage detection device, R is the resistance value of the resistor R, is the angular frequency; C1 is the capacitance value of the equivalent capacitor C1 between the cylindrical shell and the adjacent high-voltage wire A, It is the effective value of the line voltage between two high-voltage conductors.

Images