Distributed optical fiber temperature measurement system for converter valve
By installing a fiber optic ring with a copper frame on the converter valve, the blind spot and signal drift problem in the converter valve temperature detection is solved, realizing high-precision, interference-resistant real-time monitoring and fault early warning, and reducing maintenance difficulty and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-04-03
AI Technical Summary
Existing converter valve temperature detection has blind spots in infrared monitoring. Traditional distributed fiber optic temperature measurement is prone to signal drift and fiber fatigue breakage in high-frequency vibration environments. It is also cumbersome to install, has poor adaptability, is complicated to maintain, and is costly.
A distributed fiber optic temperature measurement system with a copper skeleton and a fiber optic ring is used. The fiber optic ring is in close contact with the converter valve module to form a gapless heat conduction path, which enhances the accuracy of temperature measurement and the ability to resist electromagnetic interference. Combined with a multi-dimensional data fusion analysis module, it realizes real-time monitoring and fault early warning.
It enables comprehensive real-time monitoring of the converter valve module, improves temperature measurement accuracy and positioning accuracy, reduces fiber optic loss, extends service life, reduces maintenance costs, and has intelligent fault diagnosis capabilities.
Smart Images
Figure CN121783368A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of converter valve technology, and in particular to a distributed optical fiber temperature measurement system for converter valves. Background Technology
[0002] High-voltage direct current (HVDC) transmission has advantages such as large transmission capacity, long transmission distance, low line loss, no synchronous stability issues, and the ability to achieve asynchronous interconnection. The converter valve is a core component of the HVDC transmission system and has a significant impact on its transmission efficiency. Monitoring the operating status of the converter valve can promptly detect its losses and allow for appropriate measures to be taken before a fault occurs, ensuring reliable power transmission.
[0003] The busbar, an indispensable part of the converter valve module, is used to connect components such as the silicon stack, reactor, capacitor, and valve layers. During the operation of the converter valve, the current flowing through the busbar is relatively large, and over long periods of operation, the busbar generates a significant amount of heat, causing its temperature to rise. Over long-term operation, the contact resistance at the busbar joints may increase due to loose bolts, oxidation corrosion, or inadequate crimping, leading to thermal failures. The heat sink is responsible for quickly dissipating the heat generated by the thyristors in the valve module. Its heat dissipation efficiency directly depends on the uniformity of its temperature distribution; excessively high local temperatures can create heat dissipation bottlenecks, leading to overheating and damage to power devices. The reactor is used to suppress harmonic currents and voltage fluctuations during the commutation process. Its windings generate iron and copper losses under the influence of a high-frequency alternating magnetic field. Long-term high-temperature operation can easily cause insulation aging and winding deformation, potentially leading to short-circuit faults in severe cases. Therefore, real-time and accurate temperature monitoring of the converter valve module is one of the core requirements for ensuring the safe operation of the converter valve.
[0004] Currently, temperature detection in converter valves primarily relies on infrared thermal imaging. However, the temperature at the measurement point is affected by the shooting angle, making it difficult to detect the temperature at the busbar overlap point inside the valve, resulting in blind spots in temperature monitoring and low inspection efficiency. Traditional distributed fiber optic temperature measurement, based on the passive characteristics of optical fibers, improves resistance to electromagnetic interference. However, in the high-frequency vibration environment of converter valves, gaps exist between the optical fiber and the measured surface, easily leading to signal drift, fiber fatigue breakage, and decreased temperature measurement accuracy. Furthermore, in practical applications, it suffers from cumbersome installation, poor adaptability, complex maintenance, and high replacement costs. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a distributed optical fiber temperature measurement system for converter valves. The optical fiber ring is subjected to uniform force and fits the geometric characteristics of the temperature measurement point, uniformly covering the hot spot area. Utilizing the advantages of optical fiber itself, such as high temperature measurement accuracy, high positioning accuracy, resistance to electromagnetic interference, and ease of installation and debugging, it can realize comprehensive real-time monitoring of the converter valve module.
[0006] To achieve the above objectives, the present invention is implemented using the following technical solution: On one hand, the present invention provides a distributed optical fiber temperature measurement system for converter valves, including a distributed optical fiber temperature measurement device located in the valve control cabinet and a temperature measurement optical cable containing an optical fiber ring. The optical fiber ring is a structure in which a copper skeleton is added to a ring-shaped bare optical fiber. The distributed optical fiber temperature measurement device measures the temperature by contacting the temperature measurement point of the converter valve module through the optical fiber ring.
[0007] When applied, this invention involves installing an integrated temperature-measuring optical cable and fiber optic ring on the converter valve module. This overcomes the effects of high electric field strength, strong electromagnetic interference, and blind spots in infrared temperature measurement inside the valve tower, enhancing temperature measurement accuracy and enabling comprehensive real-time monitoring of blind spots in infrared monitoring, thus accurately detecting abnormal temperature points.
[0008] Optionally, the temperature measuring optical cable further includes a long optical fiber and a tail optical fiber, and the long optical fiber and the tail optical fiber are externally fitted with a cable layer to form a long optical cable and a tail optical cable. One end of the long optical cable is connected to the distributed optical fiber temperature measurement equipment, and the other end is connected to the optical fiber ring through the optical cable groove located in the valve control cabinet. One end of the tail optical cable is connected to the optical fiber ring, and the other end is located in the optical cable groove of the valve control cabinet.
[0009] Optional features also include fiber optic ring fixing supports and silicone rubber pads; The fiber optic ring is fixedly supported on the fiber optic ring, and the silicone rubber pad is installed on the fiber optic ring side away from the converter valve module.
[0010] Optionally, the converter valve module includes busbars, and multiple busbars are fixed by fixing screws and fixing nuts to form a busbar overlapping structure; The fixing screw penetrates the busbar insulation support and is fixed to the busbar insulation support by the first insulating nut. The busbar insulation support near the busbar side has a protrusion. The optical fiber ring is fitted onto the protrusion of the busbar insulation support and contacts the surface of the busbar overlapping structure.
[0011] Optionally, large washers are installed between the fixing screw and the top busbar, and between the fixing nut and the bottom busbar. A flat washer and a spring washer are installed between the busbar insulating support and the first insulating nut.
[0012] Optionally, the converter valve module includes a radiator, and the surface of the radiator is provided with threaded holes; An insulating screw is installed in a threaded hole on the surface of the heat sink, and the optical fiber ring is fitted onto the insulating screw and contacts the surface of the heat sink.
[0013] Optionally, the converter valve module includes a reactor, and the reactor surface is provided with threaded holes; An insulating stud is installed in the threaded hole on the surface of the reactor, and the insulating stud is fixed by a second insulating nut; An insulating stud penetrates the reactor insulation support and is fixed to the reactor insulation support by a third insulating nut. The reactor insulation support near the reactor side has a protrusion. The optical fiber ring is fitted onto the protrusion of the reactor's insulation support and contacts the surface of the reactor.
[0014] Optionally, the valve control cabinet may also include a valve monitoring unit; The valve monitoring unit and the distributed fiber optic temperature measurement device are connected to the monitoring backend via communication optical cables. The monitoring backend displays the temperature, temperature change trend, and abnormal temperature of the converter valve module in real time.
[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The fiber optic ring of this invention increases signal redundancy, improves anti-interference capability, and enhances temperature measurement accuracy. The ring structure has a controllable bending radius and a symmetrical structure for more uniform stress distribution, reducing additional losses caused by fiber bending and ensuring efficient optical signal transmission. It also conforms to the geometric characteristics of the temperature measurement point and uniformly covers hotspot areas. The fiber optic ring is equipped with a copper skeleton; copper's high thermal conductivity allows for rapid heat transfer from the converter valve module to the fiber optic ring surface, forming a gapless heat conduction path, reducing thermal resistance, and ensuring the temperature measurement response closely matches the actual temperature of the converter valve module. Simultaneously, it provides rigid support for the fiber optic ring, preventing deformation or even breakage due to thermal expansion and contraction of the converter valve module, vibration, or external impact. This ensures the fiber optic cable remains in close contact with the measured surface, extending its service life. The fiber optic ring and converter valve module are in equipotential contact, preventing floating potentials inside the valve tower. Utilizing the inherent advantages of high temperature measurement accuracy, high positioning accuracy, anti-electromagnetic interference, and ease of installation and debugging of optical fiber, a distributed temperature measurement fiber optic solution integrating structure, materials, function, and maintenance is formed. It detects potential fault points without blind spots, achieving comprehensive real-time monitoring of the temperature measurement points of the converter valve module. Attached Figure Description
[0016] Figure 1 The diagram shown is a schematic representation of the distributed optical fiber temperature measurement system for converter valves according to one embodiment of the present invention. Figure 2 The diagram shown is a structural schematic of the temperature-measuring optical cable of the present invention in one embodiment; Figure 3 The diagram shown is a schematic representation of the installation of the busbar overlapping structure and the fiber optic ring in one embodiment of the present invention. Figure 4 The diagram shown is a schematic representation of the installation of the heat sink and the fiber optic ring in one embodiment of the present invention. Figure 5 The diagram shown is a schematic representation of the installation of the reactor and the fiber optic ring in one embodiment of the present invention. Figure 6 The diagram shown is a schematic representation of the installation of the reactor and the fiber optic ring in another embodiment of the present invention. Figure 7 The diagram shown is a schematic representation of the arrangement of the temperature-measuring optical cable in the valve control cabinet in one embodiment of the present invention. Figure 8 The diagram shown is a schematic representation of the arrangement of the temperature-measuring optical cable in the valve control cabinet in another embodiment of the present invention. In the diagram: 1. Fixing screw; 2. First large washer; 3. First busbar; 4. Second busbar; 5. Third busbar; 6. Second large washer; 7. Fixing nut; 8. Fiber optic ring; 9. Silicone rubber pad; 10. Busbar insulation support; 11. Flat washer; 12. Spring washer; 13. First insulating nut; 14. Insulating screw; 15. Radiator; 16. Second insulating nut; 17. Reactor insulation support; 18. Insulating stud; 19. Third insulating nut; 20. Reactor; 21. Reactor mounting plate; 22. First straight optical cable trough; 23. Second straight optical cable trough; 24. First interlayer optical cable trough; 25. Second interlayer optical cable trough. Detailed Implementation
[0017] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.
[0018] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0019] Example 1
[0020] like Figure 1 As shown in the figure, this embodiment introduces a distributed optical fiber temperature measurement system for converter valves, including a distributed optical fiber temperature measurement device located in the valve control cabinet and a temperature measurement optical cable containing an optical fiber ring 8.
[0021] The fiber optic ring 8 is a structure in which a copper skeleton is added to a ring-shaped bare optical fiber. The distributed optical fiber temperature measurement device measures the temperature by contacting the temperature measurement point of the converter valve module through the fiber optic ring 8.
[0022] The fiber optic ring is made of bare optical fibers wound together. The small cross-sectional size of bare fibers, wound into a ring of a certain length, increases signal redundancy, improves anti-interference capability, and enhances temperature measurement accuracy. The ring structure allows for a controllable bending radius, symmetrical structure, and more uniform stress distribution, reducing additional losses caused by fiber bending and ensuring efficient optical signal transmission. It also conforms to the geometric characteristics of the temperature measurement point and uniformly covers hotspot areas. A copper skeleton is added to the fiber optic ring. Copper's high thermal conductivity allows for rapid heat transfer from the converter valve module to the surface of the fiber optic ring, forming a gapless heat conduction path, reducing thermal resistance, and ensuring that the temperature measurement response is close to the actual temperature of the converter valve module. Simultaneously, it provides rigid support for the fiber optic ring, preventing deformation or even breakage due to thermal expansion and contraction of the converter valve module, vibration, or external impact. This ensures that the fiber remains in close contact with the measured surface, extending its service life. The copper skeleton is at the same potential as the converter valve module, preventing any floating potential from being generated inside the valve tower.
[0023] The fiber optic ring of this invention increases signal redundancy, improves anti-interference capability, and enhances temperature measurement accuracy. The ring structure has a controllable bending radius and a symmetrical structure for more uniform stress distribution, reducing additional losses caused by fiber bending and ensuring efficient optical signal transmission. It also conforms to the geometric characteristics of the temperature measurement point and uniformly covers hotspot areas. The fiber optic ring is equipped with a copper skeleton; copper's high thermal conductivity allows for rapid heat transfer from the converter valve module to the fiber optic ring surface, forming a gapless heat conduction path, reducing thermal resistance, and ensuring the temperature measurement response closely matches the actual temperature of the converter valve module. Simultaneously, it provides rigid support for the fiber optic ring, preventing deformation or even breakage due to thermal expansion and contraction of the converter valve module, vibration, or external impact. This ensures the fiber optic cable remains in close contact with the measured surface, extending its service life. The fiber optic ring and converter valve module are in equipotential contact, preventing floating potentials inside the valve tower. Utilizing the inherent advantages of high temperature measurement accuracy, high positioning accuracy, anti-electromagnetic interference, and ease of installation and debugging of optical fiber, a distributed temperature measurement fiber optic solution integrating structure, materials, function, and maintenance is formed. It detects potential fault points without blind spots, achieving comprehensive real-time monitoring of the temperature measurement points of the converter valve module.
[0024] Example 2
[0025] like Figure 1 As shown in the figure, this embodiment introduces a distributed optical fiber temperature measurement system for converter valves, including a monitoring backend, a temperature measurement optical cable, an optical fiber ring fixing support, a silicone rubber pad 9, a distributed optical fiber temperature measurement device located in the valve control cabinet, and a valve monitoring unit.
[0026] Distributed fiber optic temperature measurement equipment, by adding a multi-dimensional data fusion and analysis module, combines temperature change rate, spatial temperature gradient, and historical temperature measurement data to solve the single monitoring deficiency of most current temperature measurement systems that can only collect temperature data. It can achieve functions such as more accurate anomaly point location, fault type identification, and fault trend prediction, upgrading from passive monitoring to proactive early warning and operation and maintenance guidance.
[0027] The monitoring backend receives the detection values from the valve monitoring unit and the distributed fiber optic temperature measurement equipment via communication optical cable. After data processing, it can construct a three-dimensional temperature field model of the key components of the converter valve. Based on the traditional temperature measurement system, which can only collect temperature, it can display the temperature of the measurement point, the temperature change trend, abnormal temperature and alarm functions in real time. In the future, combined with the converter station digital platform, it can build a full life cycle intelligent management and control system for the UHV transmission system.
[0028] like Figure 2 As shown, the temperature measuring optical cable includes an optical fiber ring 8, a long optical fiber, and a tail optical fiber. The temperature measuring optical cable is made of the same material as the original valve-controlled optical cable, avoiding the use of mixed materials, optimizing the cost throughout the entire life cycle, having strong electromagnetic compatibility, having no impact on the electrical performance of the valve, and ensuring normal operation. Except for the optical fiber ring position, the other positions of the temperature measuring optical cable are all processed into cables to ensure the strength of use. That is, the long optical fiber and the tail optical fiber are equipped with cable layers on the outside to form the long optical cable and the tail optical cable. The length of the long optical cable meets the temperature measuring distance requirements, and the length of the tail optical cable is ≥30 meters.
[0029] The fiber optic ring is a structure consisting of a bare, ring-shaped optical fiber with a copper skeleton. The fiber optic ring is made by winding bare optical fibers, which have a small cross-sectional area. Winding a certain length of bare fiber into a ring increases signal redundancy, improves anti-interference capabilities, and enhances temperature measurement accuracy. The ring structure allows for a controllable bending radius, symmetrical structure, and more uniform stress distribution, reducing additional losses caused by fiber bending and ensuring efficient optical signal transmission. It also conforms to the geometric characteristics of the temperature measurement point and uniformly covers hotspot areas. The copper skeleton, with its high thermal conductivity, quickly transfers heat from the converter valve module to the fiber optic ring surface, forming a gapless heat conduction path, reducing thermal resistance, and ensuring the temperature measurement response closely matches the actual temperature of the converter valve module. Simultaneously, it provides rigid support for the fiber optic ring, preventing deformation or even breakage due to thermal expansion and contraction of the converter valve module, vibration, or external impacts. This ensures the fiber remains in close contact with the measured surface, extending its service life. The copper skeleton is at the same potential as the converter valve module, preventing any floating potential from being generated inside the valve tower.
[0030] One end of the long optical cable is connected to the connector of the distributed optical fiber temperature measurement equipment, and the other end is connected to the optical fiber ring through the optical cable trough located in the valve control cabinet. One end of the tail optical cable is connected to the optical fiber ring 8, and the other end is located in the optical cable trough of the valve control cabinet.
[0031] The distributed fiber optic temperature measurement device measures temperature by contacting the temperature measurement point of the converter valve module through fiber optic ring 8.
[0032] In this embodiment, the converter valve module includes a busbar, a radiator, and a reactor.
[0033] like Figure 3The diagram shows the installation of the busbar overlap point and the fiber optic ring. The first busbar 3, the second busbar 4, and the third busbar 5 are fixed by fixing screws 1 and fixing nuts 7 to form a busbar overlap structure. The first large washer 2 and the second large washer 6 are installed between the fixing screw 1 and the top busbar, and between the fixing nut 7 and the bottom busbar, respectively. The flange face fixing screws 1, fixing nuts 7, and the first large washer 2 and the second large washer 6 of the busbar fixing remain unchanged and do not affect the original fixing structure of the busbar.
[0034] After the fixing nut 7 is tightened, the busbar insulation support 10 is installed. The fixing screw 1 passes through the busbar insulation support 10. The busbar insulation support 10 is fixed by the flat washer 11, the spring washer 12 and the first insulating nut 13. The surface of the busbar insulation support 10 near the busbar side is provided with a protrusion. The fiber optic ring 8 is sleeved on the protrusion by the silicone rubber pad 9. The fiber optic ring fixing support is added to the fiber optic ring 8 to ensure the positioning of the fiber optic ring, press the fiber optic ring tightly, ensure contact with the surface of the busbar, and prevent loosening during long-term operation.
[0035] The busbar insulation support is connected using the original busbar fixing screws without changing the structure of the busbar. The combination of the detachable busbar insulation support and the fiber optic ring facilitates quick disassembly and assembly during equipment maintenance, reducing maintenance costs. At the same time, the fiber optic ring can be prefabricated and directly fitted onto the busbar overlap area on site, eliminating the need for complex wiring and shortening the installation cycle.
[0036] like Figure 4 The diagram shows the installation of the heat sink and the fiber optic ring. A threaded hole is added to the surface of the heat sink 15. The insulating screw 14 passes through the silicone rubber pad 9 to press the fiber optic ring 8 into the threaded hole on the surface of the heat sink 15. A fiber optic ring fixing support is added to the fiber optic ring 8 to ensure the positioning of the fiber optic ring, press the fiber optic ring tightly to ensure contact with the surface of the heat sink, and prevent it from loosening during long-term operation.
[0037] like Figure 5 and Figure 6 The diagram shows the installation of the reactor and the fiber optic ring. The reactor 20 is mounted on the reactor mounting plate 21. The upper surface of the reactor 20 is provided with a threaded hole, in which an insulating stud 18 is installed and fixed by a second insulating nut 16. An insulating stud 18 penetrates the reactor insulating support 17 and is fixed to the reactor insulating support 17 by a third insulating nut 19. The reactor insulating support 17 near the reactor 20 has a protrusion. The fiber optic ring 8 is fitted onto the protrusion by a silicone rubber pad 9, and a fiber optic ring fixing support is added to the fiber optic ring 8 to ensure the fiber optic ring is positioned and pressed tightly to ensure contact with the reactor surface. At the same time, it will not loosen during long-term operation. It is fixed by an insulating stud without changing the original fixing structure of the reactor.
[0038] like Figure 7 and Figure 8 The diagram shows the arrangement of the temperature-sensing optical cable within the valve control cabinet. The first interlayer optical cable trough 24, the second interlayer optical cable trough 25, and the first straight optical cable trough 22 are the original valve tower control optical cable troughs. The second straight optical cable trough 23 is a newly added optical cable trough, utilizing the valve module's water pipe support and capacitor assembly for installation; the valve module structure does not require modification. Temperature measurement points 1-9 are the temperature measurement points in this embodiment. At each temperature measurement point, its fiber optic ring is prefabricated separately, simplifying installation without affecting the original structure of the valve module. It connects to the main optical cable via a quick connector. If damaged, the fiber optic ring can be replaced individually without disassembling the main optical cable, solving the problems of difficult installation and maintenance and high replacement costs in existing technologies. After the long optical fiber of the temperature-sensing optical cable reaches the temperature measurement point through the optical cable trough in the valve control cabinet, the fiber optic ring contacts the temperature measurement point for temperature measurement, and the pigtail returns to the original optical cable trough.
[0039] Silicone rubber is the same insulating material as the optical cable tray sheath, and does not affect the electrical performance of the valve tower. Silicone rubber has good elasticity, adapting to complex environments, and can buffer and dampen vibrations, absorbing equipment vibrations or external impacts, preventing direct friction and compression between the fiber optic ring and the rigid support. It also accommodates the difference in thermal expansion and contraction coefficients between the fiber optic ring and the support, alleviating deformation stress under high and low temperature environments. A copper skeleton is added to the fiber optic ring at the temperature measurement point, and an elastic silicone rubber pad is added during compression to prevent micro-cracks from appearing in the fiber optic cable at the temperature measurement point due to mechanical stress, which would affect the continuity of optical signal transmission. Simultaneously, it prevents the fiber optic cable from being excessively stretched or compressed, avoiding temperature measurement data deviations caused by changes in the fiber core diameter, and ensuring temperature measurement accuracy.
[0040] Traditional temperature-sensing optical fibers suffer from delayed temperature response and discrepancies between measured and actual values due to air gaps between the fiber and the measured surface, resulting in poor heat conduction paths. Copper's high thermal conductivity allows for rapid heat transfer from the sensing point to the fiber ring surface, creating a gapless heat conduction path, reducing thermal resistance, and ensuring that the temperature response closely approximates the actual temperature of the converter valve module.
[0041] Addressing the core shortcomings of existing temperature measurement technologies—namely, their reliance on customized single devices, poor cross-scenario compatibility, insufficient environmental tolerance leading to component damage or signal drift due to corrosion and vibration, limited measurement accuracy and stability with internal monitoring blind spots, and limited functionality (limited to temperature acquisition without fault diagnosis or intelligent early warning capabilities), coupled with cumbersome maintenance, time-consuming replacements, and high costs—this embodiment achieves comprehensive advantages through multi-dimensional innovations such as modular structural design, selection of weather-resistant and corrosion-resistant materials, optimization of thermally conductive buffer structures, and intelligent data processing. These advantages include full-scenario compatibility, stable operation in complex environments, high-precision blind-spot-free monitoring, intelligent fault diagnosis, and convenient operation and maintenance. This solves the core pain points of traditional solutions, which struggle to adapt to multiple devices and complex operating conditions in power systems and fail to achieve high-precision, intelligent monitoring.
[0042] This embodiment can be widely adapted to the entire industrial chain of flexible DC transmission, conventional high-voltage transmission, and new energy photovoltaic / wind power. It covers various key equipment in the high-voltage power field, such as converter valves of different voltage levels, valve side bushings, high-voltage cable joints, photovoltaic inverter insulated gate bipolar transistor (IGBT) power modules, wind power converters, gas-insulated switchgear (GIS) bus joints, and transformer outgoing terminals. In particular, it can stably withstand complex working conditions such as strong electromagnetic fields, wide temperature range of -40℃ to 120℃, high humidity salt spray, confined and narrow spaces, and high frequency vibration.
[0043] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.
Claims
1. A distributed fiber optic temperature measurement system for a converter valve, characterized in that, This includes distributed fiber optic temperature measurement equipment located within the valve control cabinet and temperature measurement optical cables containing fiber optic loops; The optical fiber ring is a structure in which a copper skeleton is added to a ring-shaped bare optical fiber. The distributed optical fiber temperature measurement device measures the temperature by contacting the temperature measurement point of the converter valve module through the optical fiber ring.
2. The distributed optical fiber temperature measurement system for converter valves according to claim 1, characterized in that, The temperature measuring optical cable also includes a long optical fiber and a tail optical fiber, and a cable layer is added to the outside of the long optical fiber and the tail optical fiber to form a long optical cable and a tail optical cable. One end of the long optical cable is connected to the distributed optical fiber temperature measurement equipment, and the other end is connected to the optical fiber ring through the optical cable groove located in the valve control cabinet. One end of the tail optical cable is connected to the optical fiber ring, and the other end is located in the optical cable groove of the valve control cabinet.
3. The distributed optical fiber temperature measurement system for converter valves according to claim 1 further includes an optical fiber ring fixing support and a silicone rubber pad; The fiber optic ring is fixedly supported on the fiber optic ring, and the silicone rubber pad is installed on the fiber optic ring side away from the converter valve module.
4. The distributed optical fiber temperature measurement system for converter valves according to claim 1, characterized in that, The converter valve module includes busbars, and multiple busbars are fixed by fixing screws and fixing nuts to form a busbar overlapping structure; The fixing screw penetrates the busbar insulation support and is fixed to the busbar insulation support by the first insulating nut. The busbar insulation support near the busbar side has a protrusion. The optical fiber ring is fitted onto the protrusion of the busbar insulation support and contacts the surface of the busbar overlapping structure.
5. The distributed optical fiber temperature measurement system for converter valves according to claim 4, characterized in that, Large washers are installed between the fixing screw and the top busbar, and between the fixing nut and the bottom busbar, respectively; A flat washer and a spring washer are installed between the busbar insulating support and the first insulating nut.
6. The distributed optical fiber temperature measurement system for converter valves according to claim 1, characterized in that, The converter valve module includes a heat sink, and the surface of the heat sink is provided with threaded holes; An insulating screw is installed in a threaded hole on the surface of the heat sink, and the optical fiber ring is fitted onto the insulating screw and contacts the surface of the heat sink.
7. The distributed optical fiber temperature measurement system for converter valves according to claim 1, characterized in that, The converter valve module includes a reactor, and the reactor surface is provided with threaded holes; An insulating stud is installed in the threaded hole on the surface of the reactor, and the insulating stud is fixed by a second insulating nut; An insulating stud penetrates the reactor insulation support and is fixed to the reactor insulation support by a third insulating nut. The reactor insulation support near the reactor side has a protrusion. The optical fiber ring is fitted onto the protrusion of the reactor's insulation support and contacts the surface of the reactor.
8. The distributed optical fiber temperature measurement system for converter valves according to claim 1, characterized in that, The valve control cabinet also includes a valve monitoring unit; The valve monitoring unit and the distributed fiber optic temperature measurement device are connected to the monitoring backend via communication optical cables. The monitoring backend displays the temperature, temperature change trend, and abnormal temperature of the converter valve module in real time.