Partial discharge source simulation device and optical fiber vibration system

Abstract

The utility model relates to a partial discharge source simulation device and an optical fiber vibration system, and is applied to the field of optical positioning technology. The system comprises a power supply boost module, an electrode box module and an optical fiber sensor module. The power supply boost module is used for connecting commercial power to generate an input power supply. The electrode box module comprises two electrodes, the electrodes are electrically connected to the power supply boosting module so as to be connected with an input power supply, and partial discharge is generated between the two electrodes; the optical fiber sensor module comprises an optical fiber module and an optical fiber connector electrically connected to the optical fiber module, the optical fiber module is arranged on the periphery of the electrode box module in a surrounding mode and used for monitoring vibration of partial discharge, and the optical fiber connector is used for outputting vibration signals outwards. Partial discharge is generated through the arrangement of the power supply boosting module and the electrode box module, simulation of a partial discharge source is realized, then monitoring of partial discharge vibration can be realized by means of the arrangement of the optical fiber sensor module, so that a vibration signal is simulated, the overall structure is simple, and construction and use are convenient.

Description

Technical Field

[0001] This application relates to the field of optical positioning technology, and in particular to a partial discharge source simulation device and an optical fiber vibration system. Background Technology

[0002] Fiber optic vibration systems are vibration monitoring systems that use optical fibers as sensors. Their working principle is to monitor vibration using a single optical fiber, and to simultaneously realize the sensing and spatial positioning of vibration events by comprehensively utilizing the backscattering Rayleigh coherent scattering effect in light and optical time-domain reflectometry.

[0003] Fiber optic vibration systems are widely used in fields such as petroleum and power, transportation, bridges, transformers, submarine cables, and power cables. The monitored vibration signals can be collected and located in real time for pipeline leaks, excavation, security signals, external damage, and partial discharge signals along the fiber optic line.

[0004] Fiber optic vibration systems, especially fiber optic partial discharge (PD) monitoring systems, require signal injection into the sensing fiber for signal analysis and system testing during commissioning and testing. This is primarily achieved in two ways: First, using a signal generator and piezoelectric ceramic module to inject a signal into the sensing fiber. However, this method injects a digitally synthesized PD signal, which differs significantly from a real signal source, and fails to capture phenomena such as signal attenuation during spatial transmission. Second, using an audio signal source, supplemented by a power amplifier, to inject the signal into the light under test. Both methods are complex to set up and use, resulting in low commissioning efficiency. Utility Model Content

[0005] Therefore, it is necessary to provide a partial discharge source simulation device and an optical fiber vibration system to address the problems of complex construction and use of signal source injection devices and low debugging efficiency in the aforementioned optical fiber vibration systems.

[0006] In a first aspect, this application provides a partial discharge source simulation device, which adopts the following technical solution:

[0007] A partial discharge source simulation device includes a power boost module, an electrode box module, and an optical fiber sensor module. The power boost module is used to connect to mains power to generate an input power supply. The electrode box module includes two electrodes electrically connected to the power boost module to access the input power supply and generate partial discharge between the two electrodes. The optical fiber sensor module includes an optical fiber module and an optical fiber connector electrically connected to the optical fiber module. The optical fiber module surrounds the electrode box module to monitor the vibration of the partial discharge. The optical fiber connector is used to connect an external cable.

[0008] In one embodiment, the power boost module includes an input fuse and a boost transformer. The input fuse is connected in series between the input terminal of the boost transformer and the mains power. The boost transformer is used to boost the mains power to generate the input power. The output terminal of the boost transformer is electrically connected to the electrode.

[0009] In one embodiment, the partial discharge source simulation device further includes a protection circuit connected in series between the step-up transformer and the electrode.

[0010] In one embodiment, the electrode box module further includes two support members electrically connected to the power boost module. The electrodes are arranged in a one-to-one correspondence with the support members and are respectively installed on the side of the two support members that are close to each other.

[0011] In one embodiment, the support includes an electrode bracket and an electrode rod, the electrode is mounted on the electrode bracket by means of the electrode rod, and the electrode, the electrode rod and the electrode bracket are all electrically connected to the power boost module.

[0012] In one embodiment, the electrode box module further includes a protective cover disposed around the electrode and the support member, and isolates the electrode and the support member from the external environment.

[0013] In one embodiment, the electrode box module further includes a displacement adjuster that extends through the protective cover and is tractively connected to any of the electrode rods. Driven by the displacement adjuster, the electrode rod can move relative to the other electrode rod in a first direction, so that the two electrodes move toward or away from each other in the first direction.

[0014] In one embodiment, the optical fiber module includes an optical fiber box and a single-mode optical fiber. The optical fiber box is attached to the protective cover and forms a receiving area between the optical fiber box and the protective cover. The single-mode optical fiber is wound around the periphery of the protective cover and located within the receiving area. The end of the single-mode optical fiber is connected to the optical fiber connector.

[0015] In one embodiment, the fiber optic connector is configured as an APC fiber optic interface.

[0016] Secondly, this application provides an optical fiber vibration system, which adopts the following technical solution:

[0017] An optical fiber vibration system includes the aforementioned partial discharge source simulation device, optical fiber partial discharge detection device, and connecting optical fiber. The partial discharge source simulation device is used to generate a vibration signal; the optical fiber partial discharge detection device is used to perform signal analysis and system testing on the vibration signal; the connecting optical fiber is connected between the optical fiber connector and the optical fiber partial discharge detection device to transmit the vibration signal to the optical fiber partial discharge detection device.

[0018] The aforementioned partial discharge source simulation device generates partial discharge through the setting of a power supply boost module and an electrode box module, thereby simulating the partial discharge source. Then, by using the setting of an optical fiber sensor module, the vibration of partial discharge can be monitored. The overall structure is simple, easy to build and use, and has high debugging efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the partial discharge source simulation device in one embodiment of this application.

[0020] Figure 2 This is a cross-sectional view of a partial discharge source simulation device in one embodiment of this application.

[0021] Figure 3 This is a perspective view of a partial discharge source simulation device in one embodiment of this application.

[0022] Figure 4 This is a schematic diagram of an optical fiber vibration system in one embodiment of this application.

[0023] Attached image annotations:

[0024] 1. Power boost module; 11. Power plug; 12. Boost transformer; 13. Housing; 14. Three-phase power plug; 15. Power cord; 2. Electrode box module; 21. Electrode; 22. Support; 221. Electrode bracket; 222. Electrode rod; 23. Protective cover; 24. Displacement adjuster; 3. Fiber optic sensor module; 31. Fiber optic module; 311. Fiber optic box; 312. Single-mode fiber optic cable; 32. Fiber optic connector; 4. Protection circuit; 5. Fiber optic partial discharge detection device; 51. Main unit; 52. Display; 53. Sensing fiber optic cable; 6. Connecting fiber optic cable; 7. Partial discharge source simulation device; F1. First direction. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Wherein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation. The first direction refers to the direction of the line connecting the two electrodes.

[0031] The following is in conjunction with the appendix Figure 1-4 The embodiments of this application will be described in further detail.

[0032] See Figure 1 , Figure 1 A schematic diagram of a partial discharge source simulation device in one embodiment of this application is shown. One embodiment of this application provides a partial discharge source simulation device 7 for a fiber optic partial discharge monitoring system. The partial discharge source simulation device 7 includes a power boost module 1, an electrode box module 2, and a fiber optic sensor module 3.

[0033] The power boost module 1 is used to connect to the mains power and boost the mains power to generate a high-voltage input power. The input terminal of the electrode box module 2 is electrically connected to the output terminal of the power boost module 1. The electrode box module 2 can generate partial discharge through the connected high-voltage input power. In this embodiment, partial discharge is used as the simulated partial discharge power source. The fiber optic sensor module 3 is disposed around the electrode box module 2 and is used to monitor the vibration of the partial discharge.

[0034] The aforementioned partial discharge source simulation device 7 generates partial discharge through the power boost module 1 and electrode box module 2, thus simulating the partial discharge source. Then, with the aid of the fiber optic sensor module 3, the vibration of the partial discharge can be monitored, thereby simulating the vibration signal. The partial discharge source simulation device 7 has a simple overall structure, is easy to build and use, and has high debugging efficiency.

[0035] Continue reading Figure 1 As shown, the power boost module 1 includes a boost transformer 12 and a housing 13. The boost transformer 12 is installed in the housing 13, which is specifically a plastic shell that protects the boost transformer 12. The power boost module 1 also includes a power plug 11 installed on the housing 13. The input terminal of the boost transformer 12 is electrically connected to the power plug 11 via a connecting wire.

[0036] In some other embodiments, the power boost module 1 also includes a three-phase power plug 14 and a power cord 15 for connecting to mains power. The power cord 15 electrically connects the three-phase power plug 14 to the power plug 11 to enable power supply to the boost transformer 12.

[0037] In this embodiment, the power plug 11 includes a rocker switch (not shown) and an input fuse (not shown). The input fuse is connected in series between the input terminal of the step-up transformer 12 and the mains power to provide overload and short-circuit protection, limit abnormal current, suppress electromagnetic interference, and control thermal stability, thereby reducing maintenance costs. The rocker switch is used to control the on / off state of the overall circuit.

[0038] In the above embodiment, the mains power is input to the input terminal of the step-up transformer 12 after passing through the three-phase power plug 14, power cord 15, power plug 11 and connecting wires. Under the step-up action of the step-up transformer 12, the AC power (mains power) with a frequency of 50Hz and a voltage of 220V is converted into AC power (input power) with a frequency of 50Hz and a voltage of 5kV for subsequent use.

[0039] In some other embodiments, the partial discharge source simulation device 7 also includes a protection circuit 4, which is specifically connected in series at the output terminal of the step-up transformer 12, that is, in series with the power resistor of the output coil of the step-up transformer 12. In this embodiment, the protection circuit 4 uses a power resistor with a resistance of 10kΩ and a power of 10W to achieve current limiting protection for the circuit.

[0040] See Figure 1 and Figure 2 As shown, Figure 2 A cross-sectional view of a partial discharge source simulation device according to an embodiment of this application is shown. In some embodiments, the electrode box module 2 includes two electrodes 21, which are arranged opposite each other along a first direction F1 and electrically connected to the output terminal of the step-up transformer 12 to access the high-voltage input power generated after being stepped up by the step-up transformer 12, thereby generating partial discharge between the two electrodes 21 to simulate a partial discharge source.

[0041] In some other embodiments, the electrode box module 2 also includes a support member 22 electrically connected to the output terminal of the step-up transformer 12. In this embodiment, two support members 22 are also provided and arranged opposite each other along the first direction F1. The electrode 21 and the support member 22 are arranged one-to-one and respectively installed on the side of the two support members 22 that are close to each other, so that the electrode box module 2 can generate partial discharge after the input power is connected.

[0042] Specifically, the support member 22 includes an electrode bracket 221 and an electrode rod 222. The electrode 21 is mounted on the electrode bracket 221 by means of the electrode rod 222. The electrode bracket 221 is mounted on the housing 13 of the power boost module 1 mentioned above, so as to realize the installation and fixation of the electrode 21.

[0043] In this embodiment, the electrode support 221, the electrode rod 222, and the electrode 21 are all made of conductive material. The electrode support 221 is connected between the output coil of the step-up transformer 12 and the electrode rod 222 so that the input power can be smoothly delivered to the electrode 21.

[0044] The electrode support 221 is made of copper. The electrode rod 222 is a copper cylinder extending along the first direction F1, with one end passing through and connected to the electrode support 221, and the other end connected to and fixing the electrode 21. The electrode 21 is made of tungsten metal to ensure that the electrode 21 can operate stably under high temperature and high current conditions.

[0045] Continue reading Figure 2 As shown, in some embodiments, the electrode box module 2 further includes a protective cover 23. The protective cover 23 is installed around the electrode 21 and the support member 22 to isolate the electrode 21 and the support member 22 from the external environment to prevent accidental contact by operators and potential danger. In this embodiment, the protective cover 23 is specifically a cylindrical cover made of transparent plastic for insulation protection.

[0046] In other embodiments, the electrode 21 has various structural forms, including but not limited to spherical, needle-shaped and plate-shaped. The electrode rod 222 has an external thread at one end for mounting the electrode 21, and the electrode 21 has an internal threaded hole. The electrode 21 can be detachably connected to the electrode rod 222 by means of threaded connection, so that the operator can change the simulated discharge power source type by replacing the electrode 21 with different shapes during actual operation.

[0047] In some other embodiments, the electrode rod 222 is constructed as a cylindrical copper rod with external threads on its surface. The electrode support 221 has a through hole along the first direction F1 for the electrode rod 222 to pass through. The wall of the through hole has an internal thread extending along the first direction F1. The electrode rod 222 can pass through the electrode support 221 along the first direction F1 and be threadedly connected to the electrode support 221.

[0048] In this embodiment, the electrode rod 222 can rotate along its own axis to adjust its relative position with the electrode support 221, thereby driving the two relatively arranged electrodes 21 to move towards or away from each other along the first direction F1, thereby realizing the adjustment of the power of the simulated discharge power source.

[0049] Furthermore, the electrode box module 2 also includes a displacement adjuster 24, which is located outside the protective cover 23 and extends through the protective cover 23 along the first direction F1. Specifically, the displacement adjuster 24 can be an adjustment handle made of plastic. The displacement adjuster 24 has built-in threads to achieve a transmission connection with any of the electrode rods 222. When the displacement adjuster 24 rotates, the electrode rod 222 connected to it can move relative to the other electrode rod 222 along the first direction F1, thereby adjusting the distance between the two electrodes 21.

[0050] In this embodiment, the displacement adjuster 24 is located outside the protective cover 23. On the one hand, it allows the operator to adjust the power of the analog power supply without opening the protective cover 23, thereby improving the convenience of adjusting the power of the analog power supply. On the other hand, the displacement adjuster 24 is made of plastic material, which has good insulation properties, thereby effectively improving operational safety.

[0051] In some other embodiments, the electrode box module 2 also includes a scale (not shown) disposed on the surface of the protective cover 23. The scale extends along the first direction F1 and is set to correspond to the movement trajectory of the two electrodes 21. In this embodiment, the scale is engraved on the protective cover 23 made of transparent plastic material and is graduated in millimeters, so that the operator can visually measure the distance between the two electrodes 21 during the adjustment process, thereby improving the adjustment efficiency and convenience.

[0052] Combination Figures 1 to 3 As shown, Figure 3 A perspective view of a partial discharge source simulation device according to an embodiment of this application is shown. In some embodiments, the fiber optic sensor module 3 includes a fiber optic module 31 and a fiber optic connector 32. The fiber optic module 31 is disposed around the electrode box module 2 and is used to monitor the vibration of partial discharge to generate a corresponding vibration signal. The fiber optic connector 32 is electrically connected to the fiber optic module 31 and is used to connect external cables.

[0053] Specifically, the fiber optic module 31 includes a fiber optic box 311 and a single-mode fiber 312 wound around the periphery of the protective cover 23. The shape of the fiber optic box 311 fits tightly against the protective cover 23 and forms a receiving area, in which the single-mode fiber 312 is bundled to protect it. Furthermore, the two ends of the single-mode fiber 312 are led out and connected to the aforementioned fiber optic connectors 32.

[0054] In this embodiment, the single-mode fiber 312 is specifically a 50-meter single-mode fiber wound around the protective cover 23, and the fiber connector 32 is an APC fiber interface.

[0055] See Figures 1 to 4 As shown, Figure 4A schematic diagram of an optical fiber vibration system according to one embodiment of this application is shown. In some embodiments, the optical fiber vibration system includes a partial discharge source simulation device 7, an optical fiber partial discharge detection device 5, and a connecting optical fiber 6 as shown in any of the above embodiments. The partial discharge source simulation device 7 is used to simulate and generate vibration signals from a partial discharge source. The optical fiber partial discharge detection device 5 is connected between the optical fiber connector 32 of the partial discharge source simulation device 7 and the sensing optical fiber 53 of the optical fiber partial discharge detection device 5 via the connecting optical fiber 6, and is used for signal analysis and system testing of the received vibration signals.

[0056] In this embodiment, the connecting fiber 6 is a single-mode fiber of a certain length, specifically a single-mode fiber with a length of 2km. The connecting fiber 6 is connected in series between the sensing fiber 53 and the fiber optic connector 32 to facilitate the fiber optic partial discharge detection device 5 in locating the location of partial discharge or vibration in the connecting fiber 6. The fiber optic partial discharge detection device 5 specifically includes a host 51 and a display 52. ​​The host 51 is connected to the partial discharge source simulation device 7 via the sensing fiber 53, the connecting fiber 6, and the fiber optic connector 32. The display 52 is used to display the monitoring results.

[0057] In actual operation, the operator adjusts the displacement adjuster 24 to adjust the distance between the two electrodes 21 to 1mm, and then turns on the boat-shaped switch of the partial discharge source simulation device 7. At this time, partial discharge can be observed between the two electrodes 21. Finally, turn on the host 51 of the fiber optic partial discharge detection device 5 in the fiber optic vibration system, open the measurement software on the computer monitor 52, and the fiber optic partial discharge monitoring system test can be started.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A partial discharge source simulation device for use in an optical fiber partial discharge monitoring system, characterized in that, The partial discharge source simulation device includes: A power boost module is used to connect to AC power to generate input power; An electrode box module includes two electrodes, which are electrically connected to the power boost module to access the input power supply, and generate partial discharge between the two electrodes; and The fiber optic sensor module includes a fiber optic module and a fiber optic connector electrically connected to the fiber optic module. The fiber optic module is arranged around the electrode box module for monitoring vibrations of partial discharge. The fiber optic connector is used to connect external cables.

2. The partial discharge source simulation device according to claim 1, characterized in that, The power boost module includes an input fuse and a boost transformer. The input fuse can be connected in series between the input terminal of the boost transformer and the mains power. The boost transformer is used to boost the mains power to generate the input power. The output terminal of the boost transformer is electrically connected to the electrode.

3. The partial discharge source simulation device according to claim 2, characterized in that, The partial discharge source simulation device also includes a protection circuit connected in series between the step-up transformer and the electrode.

4. The partial discharge source simulation device according to claim 1, characterized in that, The electrode box module also includes two support members electrically connected to the power boost module. The electrodes are arranged in a one-to-one correspondence with the support members and are respectively installed on the side of the two support members that are close to each other.

5. The partial discharge source simulation device according to claim 4, characterized in that, The support includes an electrode bracket and an electrode rod. The electrode is mounted on the electrode bracket via the electrode rod. The electrode, the electrode rod, and the electrode bracket are all electrically connected to the power boost module.

6. The partial discharge source simulation device according to claim 5, characterized in that, The electrode box module also includes a protective cover, which is located around the electrode and the support member and isolates the electrode and the support member from the external environment.

7. The partial discharge source simulation device according to claim 6, characterized in that, The electrode box module also includes a displacement adjuster that passes through the protective cover and is tractively connected to any of the electrode rods. Driven by the displacement adjuster, the electrode rod can move relative to the other electrode rod in a first direction, so that the two electrodes move toward or away from each other in the first direction.

8. The partial discharge source simulation device according to claim 6, characterized in that, The optical fiber module includes an optical fiber box and a single-mode optical fiber. The optical fiber box is attached to the protective cover and forms a receiving area between the optical fiber box and the protective cover. The single-mode optical fiber is wound around the periphery of the protective cover and located within the receiving area. The end of the single-mode optical fiber is connected to the optical fiber connector.

9. The partial discharge source simulation device according to claim 1, characterized in that, The fiber optic connector is configured as an APC fiber optic interface.

10. An optical fiber vibration system, characterized in that, include: The partial discharge source simulation device as described in any one of claims 1-9 is used to generate vibration signals; and Fiber optic partial discharge detection device is used for signal analysis and system testing of vibration signals.

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