Ultra-high frequency sensor drop and method

Abstract

This invention discloses a device and method for extracting ultra-high frequency (UHF) sensor signals, relating to the field of UHF detection technology. It includes: a sensor connection module for connecting to the output terminal of an UHF sensor to extract the sensor's detection signal; a housing containing the detection module, which provides a detection interface for the extracted UHF sensor detection signal; and a transmission wire, one end of which is connected to the sensor connection module, and the other end of which is connected to the housing. This invention facilitates measurement by operators, eliminating the need for climbing or using ladders, thus reducing measurement time and improving efficiency.

Description

Technical Field

[0001] This invention belongs to the field of ultra-high frequency monitoring technology, and more specifically, relates to ultra-high frequency sensor lead-down device and method. Background Technology

[0002] Partial discharge ultra-high frequency (UHF) monitoring technology is an important means of diagnosing the insulation condition of power equipment. UHF sensors are typically installed at basin-type insulators, observation windows, or special interfaces of power equipment to detect UHF electromagnetic wave signals radiated by partial discharge.

[0003] In recent years, with the continuous improvement of power grid equipment reliability requirements, the number of monitoring sensors configured in GIS (Gas Insulated Switchgear) or HGIS (Hybrid Gas Insulated Switchgear) equipment has increased significantly compared to earlier periods. Furthermore, some sensors are installed in concealed locations, causing considerable inconvenience for on-site inspections by maintenance personnel. Moreover, disassembling and assembling N-type connectors requires opening the external screws of the junction box, and sometimes the sealing element needs to be opened. Repeated disassembly and assembly during interface replacement can lead to wear and breakage of the N-type connector. Improper N-type connector connections can also easily trigger external floating discharge signals, affecting monitoring results. Some built-in UHF sensors are installed at high positions, and some are inside the equipment housing, increasing the workload and risks associated with replacing N-type connector cables (working at heights, accidental contact with equipment inside the housing).

[0004] To monitor for partial discharge within the combined electrical equipment, built-in UHF sensors are installed inside the equipment in accordance with industry and State Grid standards. Each built-in UHF sensor has exactly one N-type test interface, which is an internationally recognized interface for UHF sensors used to connect to UHF partial discharge detection instruments. To meet the latest standards and on-site testing requirements, as well as the need for abnormal signal retesting, the unique N-type interface of the built-in UHF sensor needs to be reused during testing. This includes routine online monitoring and, when necessary, replacing the wiring of live-line testing or positioning equipment for operational purposes.

[0005] However, in the complex and harsh electromagnetic environment of substations, due to objective constraints such as limited internal space and insufficient safety distance, operators and detection devices are easily placed within the range of high-voltage electric field induction, facing dual safety risks such as induced electric shock and burns from equipment discharge arcs. This not only poses a direct threat to the personal safety of operators, but also creates significant hidden dangers to on-site safety management and stable equipment operation. Summary of the Invention

[0006] In view of the shortcomings of the above or existing technologies, the present invention proposes an ultra-high frequency sensor lead-down device and method, which can reduce personnel safety risks, is plug-and-play, and greatly improve detection efficiency.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] In a first aspect, the present invention provides an ultra-high frequency sensor down-lead device, comprising:

[0009] The sensor connection module is used to connect to the output terminal of the UHF sensor and extract the detection signal of the UHF sensor.

[0010] The enclosure contains a detection module, which provides a detection interface for the detection signals from the ultra-high frequency sensor.

[0011] A transmission wire, one end of which is connected to the sensor connection module, and the other end of which is connected to the housing.

[0012] As a further technical solution of the present invention, the housing includes:

[0013] The enclosure consists of a main body and a top cover. The top cover is located on the upper side of the main body. The main body has a door and a cable inlet at the bottom. A detection module is located inside the main body and is connected to a transmission cable.

[0014] As a further technical solution of the present invention, the detection module includes: a transmission line interface, an overvoltage protector, and a detection interface. The transmission line interface is used to electrically connect to the transmission line, the overvoltage protector is used to provide overvoltage protection for the detection signal transmitted by the transmission line, and the detection interface is used to connect to an external handheld detection device.

[0015] Furthermore, a cover is provided on the detection interface, and the cover is threadedly connected to the detection interface.

[0016] As a further technical solution of the present invention, the sensor connection module includes:

[0017] The housing has a through hole for a transmission wire, and a nylon waterproof connector is provided on the through hole for the transmission wire;

[0018] The first connector is an RF connector that matches the output port of the UHF sensor;

[0019] The transmission wire is connected to the first connector through a transmission wire through hole.

[0020] Furthermore, a sealing gasket is provided between the first connector and the ultra-high frequency sensor.

[0021] Furthermore, the transmission conductor is a coaxial cable.

[0022] Furthermore, a nylon waterproof connector is provided at the cable inlet.

[0023] As a further technical solution of the present invention, it also includes a bracket for fixing the box body. The bracket includes a first column and a second column, which are fixed to the ground by anchor bolts. The box body is connected to the first column and the second column by a back plate.

[0024] Secondly, the present invention provides a method for down-conducting an ultra-high frequency sensor, comprising the following steps:

[0025] Connect one end of the transmission wire to the signal output terminal of the UHF sensor inside the GIS equipment, and introduce the other end of the transmission wire through the inlet of the box;

[0026] Open the box door and remove the cover from the test connector;

[0027] The detection connector is connected to an external detection device to receive the signal sensed by the ultra-high frequency sensor.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. The sensor connection module of the present invention is installed inside the GIS equipment. It leads out the detection signal of the UHF sensor by connecting to the output terminal of the UHF sensor. The sensor connection module is installed on the cable that may generate UHF partial discharge signal of the cable under test.

[0030] 2. Multiple detection modules can be installed inside the enclosure. The number of detection modules is determined according to the number of UHF sensors deployed on site. A set of down-lead devices can be set up in the same area or on the same equipment to facilitate measurement by operators. Measurement can be completed without operators climbing or using ladders, reducing measurement time and improving measurement efficiency.

[0031] 3. The outer shell serves to fix and support the transmission wire. The transmission wire is connected to the first connector through the transmission wire through hole. The first connector is connected to the UHF sensor. The UHF sensor is protected by a nylon waterproof connector to prevent dust and water from entering, thus protecting the GIS equipment and the UHF sensor.

[0032] 4. The box body is protected from rain by setting a top cover. The detection module is installed inside the box body. The box door is locked with a safety lock. When testing is required, the operator can open the box door with a key. The bottom of the box body is equipped with a cable inlet with a nylon waterproof connector. The transmission wire passes through the nylon waterproof connector and enters the box body to connect with the detection module.

[0033] 5. The detection module uses a transmission wire to bring down the detection signal from the UHF sensor as a measurement point. To provide overvoltage protection for the handheld tester, an overvoltage protector is installed on the detection module to prevent damage to the handheld tester due to excessive voltage. The overvoltage protector is integrated into the detection module and adopts a modular structure, making installation and operation convenient.

[0034] 6. Install a cover on the detection interface to seal and protect the detection interface.

[0035] 7. To ensure the stability of the mounting structure of the first connector and the UHF sensor, a sealing gasket is provided between the first connector and the UHF sensor.

[0036] 8. The transmission line is a coaxial cable. Coaxial cables have strong anti-interference capabilities, low signal attenuation, and are simple and convenient to install and maintain.

[0037] 9. To ensure the airtightness of the enclosure, a nylon waterproof connector is installed at the cable inlet. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a structural diagram of the ultra-high frequency sensor lead-down device provided by the present invention;

[0040] Figure 2 The sensor connection module structure diagram provided by the present invention;

[0041] Figure 3 The internal structure diagram of the box provided by this invention;

[0042] Figure 4 This invention provides a field installation structure diagram of the UHF sensor lead-down device.

[0043] Figure 5 This is a flowchart of the ultra-high frequency sensor down-drawing method provided by the present invention;

[0044] As shown in the figure:

[0045] 10-Sensor connection module, 20-Box, 30-Transmission wire, 40-Bracket;

[0046] 101-Outer shell, 102-First connector, 111-Through hole for transmission wire, 112-Nylon waterproof connector;

[0047] 201-Box body, 202-Top cover, 211-Cable inlet, 203-Detection module, 231-Transmission wire interface, 232-Overvoltage protector, 233-Detection interface, 234-Cover;

[0048] 401 - First column, 402 - Second column. Detailed Implementation

[0049] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0050] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0051] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms as used in this disclosure, mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, but do not exclude other elements or objects. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. It should be noted that the embodiments of the present invention can be applied to any applicable scenario.

[0053] See Figures 1 to 4 The present invention provides an ultra-high frequency sensor down-lead device, comprising:

[0054] The sensor connection module 10 is used to connect to the output terminal of the UHF sensor and extract the detection signal of the UHF sensor.

[0055] The sensor connection module is located inside GIS equipment A. It connects to the output terminal of the UHF sensor to draw out the detection signal of the UHF sensor. The sensor connection module is installed on the cable that may generate UHF partial discharge signal of the cable under test. Each sensor connection module is connected to the box through a transmission wire. Multiple detection modules can be set up inside the box. Each detection module corresponds to one UHF sensor of the detection equipment.

[0056] Multiple detection modules can be installed inside the enclosure. The number of detection modules is determined based on the number of UHF sensors deployed on site. A set of down-lead devices can be set up in the same area or on the same equipment to facilitate measurement by operators. Measurement can be completed without operators climbing or using ladders, reducing measurement time and improving measurement efficiency.

[0057] See Figure 2 In this embodiment of the invention, the sensor connection module 10 includes:

[0058] The housing 101 has a transmission wire through hole 111 and a nylon waterproof connector 112 on the transmission wire through hole 111.

[0059] The first connector 102 is an RF connector that matches the output port of the UHF sensor.

[0060] The transmission wire 30 is connected to the first connector 102 through the transmission wire through hole 111.

[0061] The outer casing serves to fix and support the transmission wire. The transmission wire is connected to the first connector through the transmission wire through hole. The first connector is connected to the UHF sensor. The UHF sensor is protected by a nylon waterproof connector to prevent dust and water from entering, thus protecting the GIS equipment A and the UHF sensor.

[0062] In this embodiment of the invention, a box is set up to hold the other end of the lead-out transmission wire as a detection port. The height of the box can be set to a height that can be tested when a person is standing. It can be installed on the A bracket of the GIS equipment or a separate bracket can be set up for separate installation.

[0063] A detection module 203 is installed inside the housing 20. The detection module 203 is used to provide a detection interface for the detection signal of the ultra-high frequency sensor.

[0064] Optionally, the enclosure 20 includes:

[0065] The enclosure consists of a main body 201 and a top cover 202. The top cover 202 is located on the upper side of the main body 201. The main body 201 has a door and a cable inlet 211 at the bottom. A detection module 203 is located inside the main body 201 and is connected to the transmission cable 30.

[0066] The box body is protected from rain by a top cover. The detection module is installed inside the box body. The door is locked with a safety lock. When testing is required, the operator can open the door with a key. The bottom of the box body is equipped with a cable inlet with a nylon waterproof connector. The transmission cable passes through the nylon waterproof connector and enters the box body to connect with the detection module.

[0067] See Figure 3 The detection module 203 includes: a transmission line interface 231, an overvoltage protector 232, and a detection interface 233. The transmission line interface 231 is used to electrically connect to the transmission line, the overvoltage protector 232 is used to provide overvoltage protection for the detection signal transmitted by the transmission line, and the detection interface 233 is used to connect to an external handheld detection device.

[0068] The detection module uses a transmission wire to bring down the detection signal from the UHF sensor as a measurement point. To protect the handheld tester from overvoltage, an overvoltage protector is installed on the detection module to prevent damage to the handheld test equipment due to excessive voltage. The overvoltage protector is integrated into the detection module, adopting a modular structure that is easy to install and operate.

[0069] A cover 234 is set on the detection interface 233. During testing, the cover is removed. After the test is completed, the cover is installed on the detection module. The cover 234 and the detection interface 233 are connected by a thread, or by a snap-fit ​​or a rotating shaft. This invention does not limit the connection.

[0070] A transmission wire 30 is provided, with one end connected to the sensor connection module 10 and the other end connected to the housing 20.

[0071] To ensure the stability of the mounting structure of the first connector and the UHF sensor, a sealing gasket is provided between the first connector 102 and the UHF sensor.

[0072] Among them, the transmission conductor 30 is a coaxial cable. Coaxial cables have strong anti-interference capabilities and are equipped with an internal shielding layer, which can effectively block external electromagnetic interference and radio frequency interference, reduce signal attenuation, and are simple and convenient to install and maintain.

[0073] To ensure the airtightness of the enclosure, a nylon waterproof connector is installed at the inlet 211.

[0074] See Figure 1 and Figure 4 In this embodiment of the invention, in order to facilitate the installation of the box, a bracket 40 is also included. The bracket 40 is used to fix the box 20. The bracket 40 includes a first column 401 and a second column 402. The first column 401 and the second column 402 are fixed to the ground by anchor bolts. The box 20 is connected to the first column 401 and the second column 402 by a back plate.

[0075] See Figure 5 This invention provides a method for down-conducting an ultra-high frequency sensor, comprising the following steps:

[0076] Step S1: Connect one end of the transmission wire to the signal output terminal of the ultra-high frequency sensor in GIS equipment A, and introduce the other end of the transmission wire through the inlet of the housing;

[0077] Step S2: Open the box door and remove the cover from the test connector;

[0078] Step S3: Connect the detection connector through an external detection device to receive the signal sensed by the ultra-high frequency sensor.

[0079] The various variations and specific examples of the UHF sensor lead-down device in the foregoing embodiments are also applicable to the UHF sensor lead-down method in this embodiment. Through the foregoing detailed description of the UHF sensor lead-down device, those skilled in the art can clearly understand the UHF sensor lead-down method in this embodiment. Therefore, for the sake of brevity, it will not be described in detail here.

[0080] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the invention to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A UHF sensor lead-down device, characterized in that, include: The sensor connection module is used to connect to the output terminal of the UHF sensor and extract the detection signal of the UHF sensor. The enclosure contains a detection module, which provides a detection interface for the detection signals from the ultra-high frequency sensor. A transmission wire, one end of which is connected to the sensor connection module, and the other end of which is connected to the housing.

2. The ultra-high frequency sensor lead-down device according to claim 1, characterized in that, The enclosure includes: The enclosure consists of a main body and a top cover. The top cover is located on the upper side of the main body. The main body has a door and a cable inlet at the bottom. A detection module is located inside the main body and is connected to a transmission cable.

3. The ultra-high frequency sensor lead-down device according to claim 2, characterized in that, The detection module includes: a transmission line interface, an overvoltage protector, and a detection interface. The transmission line interface is used for electrical connection with the transmission line, the overvoltage protector is used for overvoltage protection of the detection signal transmitted by the transmission line, and the detection interface is used for connection with an external handheld detection device.

4. The ultra-high frequency sensor lead-down device according to claim 3, characterized in that, A cover is provided on the detection interface, and the cover is threadedly connected to the detection interface.

5. The ultra-high frequency sensor lead-down device according to claim 1, characterized in that, The sensor connection module includes: The housing has a through hole for a transmission wire, and a nylon waterproof connector is provided on the through hole for the transmission wire; The first connector is an RF connector that matches the output port of the UHF sensor; The transmission wire is connected to the first connector through a transmission wire through hole.

6. The ultra-high frequency sensor lead-down device according to claim 5, characterized in that, A sealing gasket is provided between the first connector and the second connector.

7. The ultra-high frequency sensor lead-down device according to claim 1, characterized in that, The transmission conductor is a coaxial cable.

8. The ultra-high frequency sensor lead-down device according to claim 2, characterized in that, A nylon waterproof connector is installed at the cable inlet.

9. The ultra-high frequency sensor lead-down device according to claim 6, characterized in that, It also includes a support frame for fixing the box body. The support frame includes a first column and a second column, which are fixed to the ground by anchor bolts. The box body is connected to the first column and the second column by a back plate.

10. A method for leading down an ultra-high frequency sensor, employing the ultra-high frequency sensor leading down device as described in any one of claims 1-10, comprising the following steps: Connect one end of the transmission wire to the signal output terminal of the UHF sensor inside the GIS equipment, and introduce the other end of the transmission wire through the inlet of the box; Open the box door and remove the cover from the test connector; The detection connector is connected to an external detection device to receive the signal sensed by the ultra-high frequency sensor.

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