Ground wire temperature measuring mechanism, circuit ice melting device and power transmission system

Abstract

The invention belongs to the technical field of power transmission disaster prevention, and particularly relates to a ground wire temperature measuring mechanism, a circuit ice melting device and a power transmission system.The ground wire temperature measuring mechanism is used for an extra-high voltage ground wire, the extra-high voltage ground wire comprises a plurality of optical fibers, and the ground wire temperature measuring mechanism comprises a photoelectric separator connected with the optical fibers; the photoelectric separator is used for sending an optical signal to the optical fiber; the optical fiber temperature measuring assembly is in communication connection with the photoelectric separator, the optical fiber temperature measuring assembly is used for sending an optical signal to the optical fiber, the photoelectric separator transmits a feedback signal fed back by the optical fiber to the optical fiber temperature measuring assembly, and the optical fiber temperature measuring assembly obtains the temperature of different positions of the optical fiber according to the feedback signal. By adopting the ground wire temperature measuring mechanism, the optical fiber temperature in the extra-high voltage ground wire comprising a plurality of optical fibers can be measured, so that the circuit ice melting device can accurately regulate and control the ice melting current.

Description

Technical Field

[0001] The present invention belongs to the technical field of power transmission disaster prevention, and in particular relates to a ground wire temperature measurement mechanism, a circuit ice melting device and a power transmission system. Background Art

[0002] UHV transmission lines are the main arteries of "sending electricity from west to east" for clean energy. They have high transmission power, long line distances, and large spans. They often inevitably cross high-altitude mountainous areas prone to ice accumulation, which is very prone to serious ice accumulation, causing tripping, disconnection and other accidents, seriously endangering the safety of large power grids. Compared with conductors, ground wires are higher from the ground, have higher wind speeds, and do not conduct current. Ground wires are more prone to ice accumulation than conductors. Compared with conductors, ground wires are more prone to ice accumulation and disconnection, tower damage and other accidents. Ice accumulation on ground wires has become the main reason for threatening the safe and reliable operation of UHV lines.

[0003] Electric current de-icing can eliminate ice on hundreds of kilometers of lines within 1 hour. To de-ice the ground wire, the ground wire must first be insulated and loaded with DC current to generate heat to melt the ice. The UHV ground wire is located at a high position and crosses a rich terrain. The wind speed and temperature of different sections of the ice-covered ground wire vary greatly. If the de-icing current is too small, the de-icing effect of some sections may be poor. If the de-icing current is too large, it may cause severe local heating and damage to the optical fiber. Therefore, under the complex meteorological conditions faced by the ground wire of the UHV transmission line, it is difficult to accurately select the de-icing current of the ground wire. Inappropriate current values ​​will hinder the safe and effective de-icing of the UHV line. Therefore, when de-icing the optical fiber overhead ground wire, it is necessary to effectively monitor the optical core temperature. There is currently no perfect and effective temperature monitoring technology for de-icing the UHV optical fiber overhead ground wire. The main problems are as follows: the optical fiber is located in the middle of the UHV ground wire, and it is difficult to measure the temperature of the optical fiber inside the UHV ground wire directly using contact temperature measurement equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a ground wire temperature measurement mechanism, a circuit ice melting device and a power transmission system to accurately detect the internal optical fiber temperature in the ultra-high voltage ground wire.

[0005] In order to achieve the above object, the present invention provides a ground wire temperature measurement mechanism on one hand, the ground wire temperature measurement mechanism is used for an ultra-high voltage ground wire, the ultra-high voltage ground wire includes a plurality of optical fibers, and the ground wire temperature measurement mechanism includes:

[0006] A photoelectric separator is connected to the optical fiber, and the photoelectric separator is used to send an optical signal to the optical fiber;

[0007] The optical fiber temperature measurement component is connected to the photoelectric separator for communication. The optical fiber temperature measurement component is used to send an optical signal to the optical fiber. The photoelectric separator transmits the feedback signal of the optical fiber to the optical fiber temperature measurement component. The optical fiber temperature measurement component obtains the temperature of different positions of the optical fiber according to the feedback signal.

[0008] In some embodiments, the ground wire temperature measurement mechanism further includes: an optical fiber signal protection component electrically connected between the photoelectric separator and the optical fiber temperature measurement component and used to ensure that optical signals and feedback signals can be stably transmitted between the photoelectric separator and the optical fiber temperature measurement component.

[0009] A second aspect of the present invention provides a circuit de-icing device, which includes: a ground wire temperature measuring mechanism according to the above-mentioned ground wire temperature measuring mechanism; an de-icing mechanism, which is electrically connected to the ground wire temperature measuring mechanism and the ultra-high voltage ground wire, and the de-icing mechanism is used to transmit de-icing current to the ultra-high voltage ground wire according to the temperature signal emitted by the temperature measuring mechanism.

[0010] In some embodiments, the ice-melting mechanism includes: an ice-melting power supply, electrically connected to the ultra-high voltage ground line; an ice-melting controller, electrically connected to the ice-melting power supply, and the ice-melting controller is used to obtain the temperature signal emitted by the ground line temperature measurement mechanism and control the ice-melting power supply to transmit ice-melting current to the ultra-high voltage ground line.

[0011] In some embodiments, both ends of the UHV ground wire are respectively connected to an ice-melting power source to form an ice-melting circuit, and the circuit ice-melting device further includes: an ice-melting switch installed on the ice-melting circuit and used to control the on and off of the ice-melting circuit.

[0012] In some embodiments, the UHV ground wire includes two optical fiber overhead ground wires, the first ends of the two optical fiber overhead ground wires are respectively connected to the two ends of the ice-melting power supply, and the second ends of the two optical fiber overhead ground wires are connected to each other to form an ice-melting loop; the number of ground wire temperature measuring mechanisms is two, and the two ground wire temperature measuring mechanisms are respectively used to measure the temperature of different positions of the optical fibers in the two optical fiber overhead ground wires; the two optical fiber temperature measurement components respectively send first temperature signals to the ice-melting controller, and the ice-melting controller is used to control the size of the ice-melting current according to the two first temperature signals.

[0013] In some embodiments, the ice-melting controller includes: a first temperature analysis component, which is electrically connected to two optical fiber temperature measurement components, and the first temperature analysis component is used to determine the ice-melting current required for melting the ultra-high voltage ground wire based on the first temperature signal emitted by the two optical fiber temperature measurement components; a first ice-melting output component, which is used to send an ice-melting control signal to the ice-melting power supply according to the ice-melting current required for melting the ice.

[0014] In some embodiments, the UHV ground wire includes an optical fiber overhead ground wire and an aluminum-clad steel stranded wire hybrid ground wire, the two ends of the ice-melting power supply are respectively connected to the first ends of the optical fiber overhead ground wire and the aluminum-clad steel stranded wire hybrid ground wire, the second end of the optical fiber overhead ground wire is connected to the second end of the aluminum-clad steel stranded wire hybrid ground wire to form an ice-melting loop; the ground wire temperature measurement mechanism also includes: an external temperature measuring component, used to measure the external temperature of the aluminum-clad steel stranded wire hybrid ground wire; a temperature transmission processor, which is electrically connected to the external temperature measuring component and sends a second temperature signal to the ice-melting controller according to the external temperature detected by the external temperature measuring component, and the first temperature signal sent by the optical fiber temperature measurement component is sent to the ice-melting controller, and the ice-melting controller is used to control the magnitude of the ice-melting current according to the first temperature signal and the second temperature signal.

[0015] In some embodiments, the ice-melting controller includes: a second temperature analysis component, which is electrically connected to the optical fiber temperature measurement component and the temperature transmission processor, and the second temperature analysis component is used to determine the size of the ice-melting current required for melting the ultra-high voltage ground wire based on the first temperature signal and the second temperature signal emitted by the optical fiber temperature measurement component; a second ice-melting output component is used to send an ice-melting control signal to the ice-melting power supply according to the size of the ice-melting current required for melting the ice.

[0016] A second aspect of the present invention provides a power transmission system, which includes: an ultra-high voltage ground wire, including multiple optical fibers; the above-mentioned circuit ice melting device; multiple power transmission towers; and multiple insulators, which are installed one-to-one corresponding to the multiple power transmission towers, one end of the insulator is connected to the power transmission tower, and the other end of the insulator is connected to the ultra-high voltage ground wire and is used to isolate the electrical connection between the ultra-high voltage ground wire and the power transmission tower.

[0017] In the above technical solution, the ground wire temperature measurement mechanism includes a photoelectric separator and an optical fiber temperature measurement assembly. The ground wire temperature measurement mechanism is used for an ultra-high voltage ground wire including multiple optical fibers. The photoelectric separator can separate the optical signal and the electrical signal in the ultra-high voltage ground wire, so that the optical fiber temperature measurement assembly and the optical fiber in the ultra-high voltage ground wire can transmit the optical signal. When obtaining the temperature of different positions of the optical fiber in the ultra-high voltage ground wire, the optical fiber temperature measurement assembly sends an optical signal to the photoelectric separator and further transmits it to the optical fiber. The photoelectric separator transmits the feedback signal of the optical fiber feedback to the optical fiber temperature measurement assembly, so that the optical fiber temperature measurement assembly can obtain the temperature of different positions of the optical fiber according to the feedback signal. The above ground wire temperature measurement mechanism can be used to measure the temperature of the optical fiber in the ultra-high voltage ground wire including multiple optical fibers, and the measurement result is more accurate and the measurement safety is higher. In addition, the size of the ice melting current can be determined based on the temperature at different positions of the optical fiber to solve the technical problems in the prior art that the ice melting current is too large to damage the optical fiber, and the ice melting current is too small to have low ice melting efficiency.

[0018] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the structure of a power transmission system provided according to an embodiment of the present invention.

[0021] Description of Reference Numerals

[0022] 1 Ice melting power supply

[0023] 2 Insulators

[0024] 3 Power transmission towers

[0025] 6 Optical fiber overhead ground wire

[0026] 7 Aluminum clad steel stranded wire hybrid ground wire

[0027] 8 Ice melting switch

[0028] 9 Photoelectric separator

[0029] 10 Fiber Optic Temperature Measurement Components

[0030] 11 Fiber Optic Signal Protection Components

[0031] 12 Surface temperature measuring components

[0032] 13 Temperature Transmission Processor

[0033] 14. Second temperature analysis component

[0034] 15 Second ice melting output component DETAILED DESCRIPTION

[0035] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0036] The ground wire temperature measuring mechanism, circuit deicing device and power transmission system according to the present invention are described below with reference to the accompanying drawings. Figure 1The figure is a schematic diagram of the structure of the power transmission system provided according to an embodiment of the present invention. The ground wire temperature measurement mechanism provided by the embodiment of the present invention is used for an ultra-high voltage ground wire, the ultra-high voltage ground wire includes a plurality of optical fibers, and the ground wire temperature measurement mechanism includes:

[0037] A photoelectric separator 9 is connected to the optical fiber, and the photoelectric separator 9 is used to send an optical signal to the optical fiber;

[0038] The optical fiber temperature measurement component 10 is communicatively connected with the photoelectric separator 9. The optical fiber temperature measurement component 10 is used to send an optical signal to the optical fiber. The photoelectric separator 9 transmits the feedback signal of the optical fiber to the optical fiber temperature measurement component 10. The optical fiber temperature measurement component 10 obtains the temperature of different positions of the optical fiber according to the feedback signal.

[0039] The UHV ground wire is generally divided into an optical fiber overhead ground wire 6 including multiple optical fibers and an aluminum-clad steel stranded wire hybrid ground wire 7 that does not include an optical fiber. The optical fiber overhead ground wire 6 can not only serve as a ground wire, but can also be used to transmit optical signals. The photoelectric separator 9 can be used to separate the optical signal and the electrical signal in the UHV ground wire, isolate the voltage in the UHV ground wire, and ensure the continuous transmission of the optical signal between the optical fiber and the optical fiber temperature measurement component 10, so as to prevent the voltage in the UHV ground wire from affecting the transmission of the optical signal. The optical fiber temperature measurement component 10 can send out an optical signal and receive a feedback signal. After the optical fiber temperature measurement component 10 sends out an optical signal, it can be transmitted to the photoelectric separator 9. The photoelectric separator 9 further transmits the optical signal to the optical fiber. After the optical fiber receives the optical signal, it can send out a feedback signal to the photoelectric separator 9. The photoelectric separator 9 transmits the optical signal to the optical fiber temperature measurement component 10. The optical fiber temperature measurement component 10 can obtain the temperature of different positions of the optical fiber according to the feedback signal.

[0040] In a specific embodiment, there are multiple photoelectric separators 9, and an ultra-high voltage ground wire with a length of less than thirty kilometers and including multiple optical fibers is arranged between each photoelectric separator 9. The optical fiber temperature measurement component 10 can obtain feedback signals transmitted by multiple photoelectric separators 9, thereby determining the temperature at any position of the optical fiber in the ultra-high voltage ground wire.

[0041] By adopting the above-mentioned ground wire temperature measurement mechanism, the temperature conditions at different positions in the optical fiber in the ultra-high voltage ground wire can be accurately detected, so that the ice melting device can adjust the ice melting current according to the temperature conditions, so as to accurately melt the ultra-high voltage ground wire.

[0042] In one embodiment, Figure 1As shown, the ground wire temperature measurement mechanism also includes an optical fiber signal protection component 11, which is electrically connected between the photoelectric separator 9 and the optical fiber temperature measurement component 10, and is used to ensure that the optical signal and feedback signal can be stably transmitted between the photoelectric separator 9 and the optical fiber temperature measurement component 10. The optical fiber signal protection component 11 is usually used for the protection of optical fiber signal transmission, and can shield external electromagnetic interference, so that the optical fiber signal can be transmitted continuously, stably and at high speed. The embodiment of the present invention adopts the above-mentioned optical fiber signal protection component 11, so that the photoelectric separator 9 and the optical fiber temperature measurement component 10 can continuously and stably transmit optical signals and feedback signals.

[0043] In one embodiment, Figure 1 As shown, a circuit de-icing device is provided, which includes: according to the above-mentioned ground wire temperature measuring mechanism and de-icing mechanism, the de-icing mechanism is electrically connected to the ground wire temperature measuring mechanism and the ultra-high voltage ground wire, and the de-icing mechanism is used to transmit de-icing current to the ultra-high voltage ground wire according to the temperature signal sent by the temperature measuring mechanism, so that the ground wire is powered on and heated, and the ice on the ground wire is quickly melted. In addition, the de-icing mechanism can determine the size of the de-icing current according to the temperature transmitted by the ground wire temperature measuring mechanism, so as to accurately de-ice the ground wire.

[0044] In one embodiment, Figure 1 As shown, the ice-melting mechanism includes: an ice-melting power supply 1, which is electrically connected to the UHV ground wire; an ice-melting controller, which is electrically connected to the ice-melting power supply 1, and the ice-melting controller is used to obtain the temperature signal sent by the ground wire temperature measuring mechanism and control the ice-melting power supply 1 to transmit the ice-melting current to the UHV ground wire. The ice-melting power supply 1 stores electrical energy and can transmit the ice-melting current to the UHV transmission line under the control of the ice-melting controller. The ice-melting controller can obtain the temperature signal, and can determine the temperature at different positions of the ground wire according to the temperature signal, and then can derive the current required for ice melting, so as to prevent the ice-melting temperature from being too high to damage the ground wire, and can also prevent the ice-melting temperature from being too low to cause poor ice-melting effect.

[0045] In one embodiment, Figure 1 As shown, the two ends of the UHV ground wire are respectively connected to the ice-melting power supply 1 to form an ice-melting circuit, and the circuit ice-melting device also includes an ice-melting switch 8, which is installed on the ice-melting circuit and is used to control the on and off of the ice-melting circuit. When the ambient temperature around the UHV ground wire is high, there is no need to melt the ice on the UHV ground wire, the ice-melting switch 8 is always disconnected, and the ice-melting circuit is disconnected to prevent the ground wires in the UHV ground wire from interfering with each other; when the ambient temperature around the UHV ground wire is low, the UHV ground wire needs to be melted, and the ice-melting switch 8 is controlled to be turned on to turn on the ice-melting circuit formed by the UHV ground wire, so that the ice-melting power supply 1 can transmit the ice-melting current to the UHV ground wire to melt the ice on the UHV ground wire.

[0046] In a specific embodiment, the ice-melting switch 8 is in communication connection with the ice-melting controller, and the ice-melting controller can remotely control the ice-melting switch 8 to be turned on or off, so as to make the on-off control of the ice-melting circuit more convenient.

[0047] In one embodiment, the UHV ground wire includes two optical fiber overhead ground wires 6, the first ends of the two optical fiber overhead ground wires 6 are respectively connected to the two ends of the ice-melting power supply 1, and the second ends of the two optical fiber overhead ground wires 6 are connected to each other to form an ice-melting loop; the number of ground wire temperature measuring mechanisms is two, and the two ground wire temperature measuring mechanisms are respectively used to measure the temperature of different positions of the optical fibers in the two optical fiber overhead ground wires 6; the two optical fiber temperature measuring assemblies 10 respectively send a first temperature signal to the ice-melting controller, and the ice-melting controller is used to control the magnitude of the ice-melting current according to the two first temperature signals. The optical fiber overhead ground wire 6 includes a plurality of optical fibers and conductive lines, which can not only protect the wires and prevent lightning strikes, but also transmit optical fiber signals, and is a commonly used ground wire model for UHV ground wires. The UHV ground wire provided by the embodiment of the present invention includes two optical fiber overhead ground wires 6, the first ends of the two optical fiber overhead ground wires 6 are respectively connected to the ice-melting power supply 1, the second ends of the optical fiber overhead ground wires 6 are connected to each other to form an ice-melting loop, the number of ground wire temperature measuring mechanisms is two, and the two ground wire temperature measuring mechanisms are respectively used to measure the temperature of different positions of the optical fibers in the two optical fiber overhead ground wires 6. The two ground wire temperature measurement mechanisms can both send a first temperature signal to the ice-melting controller, so that the ice-melting controller determines the magnitude of the ice-melting current according to the two first temperature signals.

[0048] In one embodiment, the ice melting controller includes a first temperature analysis component (not shown in the figure) and a first ice melting output component (not shown in the figure). The first temperature analysis component is electrically connected to the two optical fiber temperature measurement components 10. The first temperature analysis component is used to determine the size of the ice melting current required for melting the ultra-high voltage ground wire according to the first temperature signal emitted by the two optical fiber temperature measurement components 10. The first ice melting output component is used to send an ice melting control signal to the ice melting power supply 1 according to the size of the ice melting current required for melting the ice. According to Joule's law, the heat released by the conductor is proportional to the current size. The larger the ice melting current of the ultra-high voltage ground wire, the greater the heat released. When the ice on the ultra-high voltage ground wire is thicker, a larger ice melting current is required to speed up the ice melting efficiency; when the ice on the ultra-high voltage ground wire is thinner, a smaller ice melting current is required to prevent local overheating. The first temperature analysis component can determine the appropriate ice melting current according to the first temperature signal fed back by the two optical fiber temperature measurement components 10, so that the ice melting process can both ensure the ice melting rate and avoid overheating. The first ice-melting output component can convert the ice-melting current analyzed by the first temperature analysis component into a control signal and send it to the ice-melting power supply 1 to control the ice-melting power supply 1 to output an ice-melting current of a suitable size.

[0049] In a specific embodiment, the first temperature analysis component can determine the maximum temperature and the minimum temperature of the two optical fiber overhead ground wires 6 based on the two first temperature signals, and determine the ice melting current that will neither lead to low ice melting efficiency nor overheating of the ultra-high voltage ground wire temperature based on the maximum temperature and the minimum temperature.

[0050] In a specific embodiment, the first temperature analysis component determines the ice-melting current according to the two first temperature signals once every preset time period, so as to adjust the ice-melting current according to the actual demand of the ultra-high voltage ground line.

[0051] In one embodiment, Figure 1 As shown, the UHV ground wire includes an optical fiber overhead ground wire 6 and an aluminum-clad steel stranded wire hybrid ground wire 7, the two ends of the de-icing power supply 1 are respectively connected to the first ends of the optical fiber overhead ground wire 6 and the aluminum-clad steel stranded wire hybrid ground wire 7, and the second end of the optical fiber overhead ground wire 6 is connected to the second end of the aluminum-clad steel stranded wire hybrid ground wire 7 to form a de-icing loop; the ground wire temperature measurement mechanism also includes: an external temperature measurement component 12 and a temperature transmission processor 13, the external temperature measurement component 12 is used to measure the external temperature of the aluminum-clad steel stranded wire hybrid ground wire 7, the temperature transmission processor 13 is electrically connected to the external temperature measurement component 12 and sends a second temperature signal to the de-icing controller according to the external temperature detected by the external temperature measurement component 12, and the optical fiber temperature measurement component 10 sends a first temperature signal to the de-icing controller, and the de-icing controller is used to control the magnitude of the de-icing current according to the first temperature signal and the second temperature signal. There is no optical fiber inside the aluminum-clad steel stranded wire hybrid ground wire 7, and optical signals cannot be transmitted, but compared with the optical fiber overhead ground wire 6, the cost is lower and it is widely used in ultra-high voltage transmission lines in scenarios where signal transmission is not required.

[0052] When the UHV ground wire includes an optical fiber overhead ground wire 6 and an aluminum-clad steel stranded wire hybrid ground wire 7, the optical fiber overhead ground wire 6, the aluminum-clad steel stranded wire hybrid ground wire 7 and the ice-melting power supply 1 together form an ice-melting circuit. At this time, the temperature of the aluminum-clad steel stranded wire hybrid ground wire 7 is measured by the surface temperature measuring component 12. The surface temperature measuring component 12 can measure the surface temperature of the aluminum-clad steel stranded wire hybrid ground wire 7 to obtain the surface temperature of the aluminum-clad steel stranded wire hybrid ground wire, and transmit the surface temperature to the temperature transmission processor 13. The temperature transmission processor 13 sends a second temperature signal to the ice-melting controller according to the surface temperature. The optical fiber temperature measurement component 10 sends a first temperature signal to the ice-melting controller. The ice-melting controller can respectively determine the temperature of different positions of the optical fiber overhead ground wire 6 and the temperature of different positions of the aluminum-clad steel stranded wire hybrid ground wire 7 according to the first temperature signal and the second temperature signal, and then control the ice-melting power supply 1 to output the ice-melting current to avoid overheating caused by excessive ice-melting current, or low ice-melting efficiency caused by small ice-melting current.

[0053] In one embodiment, Figure 1As shown, the ice-melting controller includes: a second temperature analysis component 14 and a second ice-melting output component 15. The second temperature analysis component 14 is electrically connected to the optical fiber temperature measurement component 10 and the temperature transmission processor 13. The second temperature analysis component 14 is used to determine the size of the ice-melting current required for melting the ultra-high voltage ground wire according to the first temperature signal and the second temperature signal sent by the optical fiber temperature measurement component 10. The second ice-melting output component 15 is used to send an ice-melting control signal to the ice-melting power supply 1 according to the size of the ice-melting current required for melting the ice. The second temperature analysis component 14 can determine the appropriate ice-melting current according to the first temperature signal and the second temperature signal, so that the ice-melting process can ensure the ice-melting rate and avoid overheating. The second ice-melting output component 15 can convert the ice-melting current analyzed by the second temperature analysis component 14 into a control signal and send it to the ice-melting power supply 1 to control the ice-melting power supply 1 to output an ice-melting current of appropriate size.

[0054] In one embodiment, Figure 1 As shown, a power transmission system is provided, which includes: an ultra-high voltage ground wire, the above-mentioned circuit deicing device, a plurality of power transmission towers 3, and a plurality of insulators 2. The plurality of insulators 2 are installed one by one with the plurality of power transmission towers 3, one end of the insulator 2 is connected to the power transmission tower 3, and the other end of the insulator 2 is connected to the ultra-high voltage ground wire and is used to isolate the electrical connection between the ultra-high voltage ground wire and the power transmission tower 3. The insulator 2 can keep the ultra-high voltage ground wire and the power transmission tower 3 insulated, preventing the deicing current from being introduced into the power transmission tower 3, causing deicing failure and energy loss.

[0055] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A ground wire temperature measurement mechanism, characterized in that: The ground wire temperature measurement mechanism is used for an ultra-high voltage ground wire, the ultra-high voltage ground wire includes a plurality of optical fibers, and the ground wire temperature measurement mechanism includes: A photoelectric separator (9) connected to the optical fiber, the photoelectric separator (9) being used to send an optical signal to the optical fiber; An optical fiber temperature measurement component (10) is communicatively connected to the photoelectric separator (9), the optical fiber temperature measurement component (10) is used to send an optical signal to the optical fiber, the photoelectric separator (9) transmits a feedback signal fed back by the optical fiber to the optical fiber temperature measurement component (10), and the optical fiber temperature measurement component (10) obtains the temperature of different positions of the optical fiber according to the feedback signal.

2. The ground temperature measurement mechanism according to claim 1, characterized in that: The ground temperature measurement mechanism also includes: The optical fiber signal protection component (11) is electrically connected between the photoelectric separator (9) and the optical fiber temperature measurement component (10), and is used to ensure that the optical signal and the feedback signal can be stably transmitted between the photoelectric separator (9) and the optical fiber temperature measurement component (10).

3. A circuit de-icing device, characterized in that: For use in UHV ground wires, the circuit de-icing device comprises: The ground temperature measuring mechanism according to any one of claims 1-2; The ice-melting mechanism is electrically connected to the ground wire temperature measuring mechanism and the ultra-high voltage ground wire, and is used to transmit ice-melting current to the ultra-high voltage ground wire according to the temperature signal sent by the temperature measuring mechanism.

4. The circuit ice melting device according to claim 3, characterized in that: The ice melting mechanism comprises: An ice-melting power source (1) electrically connected to the ultra-high voltage ground wire; An ice-melting controller is electrically connected to the ice-melting power supply (1), and is used to obtain a temperature signal sent by the ground wire temperature measuring mechanism and control the ice-melting power supply (1) to transmit an ice-melting current to the ultra-high voltage ground wire.

5. The circuit ice melting device according to claim 4, characterized in that: The two ends of the ultra-high voltage ground wire are respectively connected to an ice-melting power source (1) to form an ice-melting circuit, and the circuit ice-melting device further comprises: An ice-melting switch (8) is installed on the ice-melting circuit and is used to control the on and off of the ice-melting circuit.

6. The circuit ice melting device according to claim 4, characterized in that: The ultra-high voltage ground wire comprises two optical fiber overhead ground wires (6), the first ends of the two optical fiber overhead ground wires (6) are respectively connected to the two ends of the ice-melting power source (1), and the second ends of the two optical fiber overhead ground wires (6) are connected to each other to form an ice-melting loop; the number of the ground wire temperature measuring mechanisms is two, and the two ground wire temperature measuring mechanisms are respectively used to measure the temperature of different positions of the optical fibers in the two optical fiber overhead ground wires (6); the two optical fiber temperature measuring components (10) respectively send a first temperature signal to the ice-melting controller, and the ice-melting controller is used to control the magnitude of the ice-melting current according to the two first temperature signals.

7. The circuit ice melting device according to claim 6, characterized in that: The ice melting controller comprises: a first temperature analysis component, the first temperature analysis component being electrically connected to the two optical fiber temperature measurement components (10), and the first temperature analysis component being used to determine the magnitude of ice-melting current required for melting ice on the ultra-high voltage ground wire according to first temperature signals emitted by the two optical fiber temperature measurement components (10); The first ice-melting output component is used to send an ice-melting control signal to the ice-melting power supply (1) according to the ice-melting current required for ice-melting.

8. The circuit ice melting device according to claim 4, characterized in that: The ultra-high voltage ground wire comprises an optical fiber overhead ground wire (6) and an aluminum-clad steel stranded wire hybrid ground wire (7), two ends of the ice-melting power source (1) are respectively connected to the first ends of the optical fiber overhead ground wire (6) and the aluminum-clad steel stranded wire hybrid ground wire (7), and the second end of the optical fiber overhead ground wire (6) is connected to the second end of the aluminum-clad steel stranded wire hybrid ground wire (7) to form an ice-melting loop; the ground wire temperature measuring mechanism also comprises: An external surface temperature measuring component (12) for measuring the external surface temperature of the aluminum-clad steel stranded wire hybrid ground wire (7); A temperature transmission processor (13) is electrically connected to the surface temperature measuring component (12) and sends a second temperature signal to the ice-melting controller according to the surface temperature detected by the surface temperature measuring component (12), and sends a first temperature signal sent by the optical fiber temperature measuring component (10) to the ice-melting controller, and the ice-melting controller is used to control the magnitude of the ice-melting current according to the first temperature signal and the second temperature signal.

9. The circuit ice melting device according to claim 8, characterized in that: The ice melting controller comprises: a second temperature analysis component (14), electrically connected to the optical fiber temperature measurement component (10) and the temperature transmission processor (13), the second temperature analysis component (14) being used to determine the magnitude of an ice-melting current required for melting ice on the ultra-high voltage ground wire according to the first temperature signal and the second temperature signal emitted by the optical fiber temperature measurement component (10); The second ice-melting output component (15) is used to send an ice-melting control signal to the ice-melting power supply (1) according to the magnitude of the ice-melting current required for ice-melting.

10. A power transmission system, characterized in that: include: UHV ground wire, including multiple optical fibers; The circuit ice melting device according to any one of claims 3 to 9; multiple power transmission towers (3); A plurality of insulators (2) are installed in one-to-one correspondence with the plurality of power transmission towers (3); one end of the insulator (2) is connected to the power transmission tower (3); the other end of the insulator (2) is connected to the ultra-high voltage ground wire and is used to isolate the electrical connection between the ultra-high voltage ground wire and the power transmission tower (3).

Images