An inductor oil leakage monitoring device based on voltage sag

Abstract

The utility model provides an inductor oil leakage monitoring device based on voltage sag, belonging to the technical field of voltage sag. The inductor oil leakage monitoring device based on voltage sag comprises voltage sag control equipment, a monitoring system, a camera and an oil leakage marking piece for being attached to the inductor housing. The voltage sag control equipment is arranged in the transmission line of the inductor. The output end of the voltage sag control equipment is electrically connected to the monitoring system for sending the detected voltage sag signal to the monitoring system. The monitoring system is electrically connected to the camera for starting the camera to take pictures for a specified time when the voltage sag signal is received. The oil leakage marking piece comprises a transparent outer film and an inner net. Oily pigment particles are filled between the outer film and the inner net. The oil leakage marking piece is used to be attached to the position of the inductor that is prone to oil leakage. The utility model realizes intelligent and visual real-time monitoring of the oil leakage condition of the inductor.

Description

Technical Field

[0001] The utility model belongs to the technical field of voltage sag, and in particular relates to an inductor oil leakage monitoring device based on voltage sag. Background Art

[0002] Inductors are basic electronic components. Their working principle is based on the law of electromagnetic induction. They are mainly used in key links such as storing magnetic field energy, filtering, signal processing, and power conversion in circuits. In power systems and many industrial equipment, inductors, as an important part of power electronic equipment, play an irreplaceable role in ensuring the stable operation and energy efficiency of the system. For oil-immersed inductors, insulating oil is usually filled inside the inductor to provide good cooling effect and enhance electrical performance. Over time or due to manufacturing defects, mechanical stress, thermal expansion and contraction, etc., the frequent occurrence of voltage sags may cause oil leakage in the inductor, which will not only reduce the insulation performance, but also cause damage to the reactor and even cause safety accidents in severe cases. Voltage sag refers to a power quality problem in which the voltage in the power supply grid suddenly drops and returns to normal levels in a short time. Voltage sags may be caused by a variety of factors such as grid failures, heavy load startup, lightning strikes, etc., which affect equipment that relies on continuous and stable power supply, including possible changes in pressure inside the inductor, exacerbating the risk of insulating oil leakage. Existing technologies often delay the detection of such oil leaks. Utility Model Content

[0003] In view of this, the utility model provides an inductor oil leakage monitoring device based on voltage sag, which solves the problem that traditional inductor oil leakage is difficult to detect and realizes visual real-time monitoring of the inductor oil leakage condition.

[0004] The utility model is achieved in this way:

[0005] The utility model provides an inductor oil leakage monitoring device based on voltage sag, which comprises a voltage sag control device, a monitoring system, a camera and an oil leakage marking sheet for being attached to the shell of the inductor. The voltage sag control device is arranged in the power transmission line of the inductor, the output end of the voltage sag control device is electrically connected to the monitoring system, and is used to send a detected voltage sag signal to the monitoring system, the monitoring system is electrically connected to the camera, and is used to start the camera to shoot for a specified time when receiving the voltage sag signal, the camera is used to shoot the position of the oil leakage marking sheet, the oil leakage marking sheet comprises a transparent outer film and an inner net coated with adhesive, oily pigment particles are filled and arranged between the outer film and the inner net, the mesh of the inner net is smaller than the size of the oily pigment particles, and the oil leakage marking sheet is used to be attached to the position of the inductor that is prone to oil leakage.

[0006] On the basis of the above technical solution, the inductor oil leakage monitoring device based on voltage sag of the utility model can also be improved as follows:

[0007] The monitoring device is internally provided with a memory, which is electrically connected to the monitoring system and the camera and is used to store image data captured by the camera.

[0008] Furthermore, it also includes a solar photovoltaic panel installed on the outside of the inductor housing to provide electrical energy for the monitoring device. The solar photovoltaic panel is arranged on the top and side walls of the inductor housing, and the directions of the side walls include due south, due east and due west.

[0009] Furthermore, the locations of the inductor that are prone to oil leakage specifically include the joints of the box cover gap, flange connections, sealing gasket contact surfaces, welding points, the interface between the oil drain valve and the oil filling pipe, around the pressure release valve, and locations where there are tiny cracks or damages on the shell.

[0010] Furthermore, there are one or more cameras, which are fixed on the top or side of the inductor, with their lenses facing the inductor housing, for capturing the oil leakage marking sheet area.

[0011] Furthermore, the oily pigment particles are made of a material that is highly compatible with the insulating oil used inside the inductor, wherein the insulating oil is made of mineral insulating oil or silicone oil.

[0012] For example, the oily pigment particles may be made of dye particles that are resistant to high temperatures, chemical corrosion, and soluble in common inductor insulating media such as mineral insulating oil or silicone oil.

[0013] Furthermore, the outer film is arranged on the outer side of the inner net, and the outer film is made of a transparent and weather-resistant plastic material, including polyethylene terephthalate PET film, or polycarbonate, also known as organic glass.

[0014] Furthermore, the inner mesh is a stainless steel wire mesh or a high molecular polymer microporous membrane, for example, the high molecular polymer includes polytetrafluoroethylene.

[0015] Compared with the prior art, the beneficial effects of the inductor oil leakage monitoring device based on voltage sag provided by the utility model are as follows: the utility model innovatively combines the voltage sag detection technology and the intelligent visual monitoring together, and the specific beneficial effects are as follows:

[0016] 1. Real-time monitoring: The device can monitor the working status of the inductor in real time, and when a voltage sag occurs, it triggers the taking of photos and outputs them to the user through the monitoring system and DVR equipment, so as to detect the oil leakage of the inductor in real time;

[0017] 2. Accurate positioning: By using the designed oil leakage marker, when the insulating oil inside the inductor contacts the marker, the color will change significantly. With the help of high-definition cameras for image acquisition, the specific location of the oil leakage can be accurately found;

[0018] 3. Preventive maintenance: It can provide early warning of potential oil leakage risks, extend the service life of the inductor, and reduce the overall operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 An example diagram of an inductor oil leakage monitoring device based on voltage sag;

[0021] Figure 2 A cross-sectional view of an oil leakage marker of an inductor oil leakage monitoring device based on voltage sag;

[0022] Figure 3 It is an electrical connection diagram of an inductor oil leakage monitoring device based on voltage sag;

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 10. Voltage sag control equipment; 20. Monitoring system; 30. Camera; 40. Oil leak marker; 41. Outer membrane; 42. Intranet. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the implementation mode of the present invention clearer, the technical solution in the implementation mode of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the implementation mode of the present invention.

[0026] like Figure 1 , Figure 3As shown, it is an example diagram of an embodiment of an inductor oil leakage monitoring device based on voltage sag provided by the utility model. In this embodiment, it includes a voltage sag control device 10, a monitoring system 20, a camera 30, and an oil leakage marker 40 for attaching to the inductor housing. The voltage sag control device 10 is arranged in the transmission line of the inductor and is connected to the power grid. The output end of the voltage sag control device 10 is electrically connected to the monitoring system 20, and is used to share its own state parameters with the monitoring system 20. The monitoring system 20 is electrically connected to the camera 30, and is used to start the camera 30 to shoot for a specified time after receiving the relevant voltage sag control parameters. The camera 30 is used to shoot the position of the oil leakage marker 40 and output it to the user. The monitoring system 20 is a monitoring system of the power grid, which can collect and display the operating data of each device on the power grid in real time. The voltage sag control device 10 can use a dynamic voltage restorer DVR type device to achieve voltage sag compensation. The monitoring system 20 triggers shooting through the state of the DVR device. The user can set this trigger on the monitoring system by himself, such as the number of compensations, power or other arbitrary values, or the energy storage status of the supercapacitor in the DVR device.

[0027] The oil leakage marking sheet 40 includes a transparent outer film and an inner net coated with adhesive. Oily pigment particles are filled between the outer film and the inner net. The mesh of the inner net is smaller than the size of the oily pigment particles. The oil leakage marking sheet 40 is used to be attached to the position of the inductor that is prone to oil leakage.

[0028] It should be noted that the oil leak marker sheet is a plurality of rectangular patches, which are placed according to the purpose of use.

[0029] Among them, in the above technical solution, a memory is provided inside the monitoring system, and the memory is electrically connected to the monitoring system 20 and the camera 30 for storing image data captured by the camera 30.

[0030] Furthermore, in the above technical solution, it also includes a solar photovoltaic panel installed on the outside of the inductor shell, which is used to provide electrical energy for the monitoring device. The solar photovoltaic panel is arranged on the top and side walls of the inductor shell, and the directions of the side walls include due south, due east and due west.

[0031] Furthermore, in the above technical solution, the locations where the inductor is prone to oil leakage specifically include the joints of the box cover gap, flange connections, sealing gasket contact surfaces, welding points, the interface between the oil drain valve and the oil filling pipe, around the pressure relief valve, and locations where there are tiny cracks or damages on the shell.

[0032] Furthermore, in the above technical solution, there are one or more cameras 30 , which are fixed on the top or side of the inductor, with their lenses facing the inductor housing, for capturing the oil leakage marking sheet 40 area.

[0033] Furthermore, in the above technical solution, the oily pigment particles are made of a material that is compatible with the insulating oil used inside the inductor, wherein the insulating oil is made of mineral insulating oil or silicone oil.

[0034] When the leaking oil contacts the pigment particles, the pigment particles quickly dissolve into the leaking oil, causing the leaking oil to change color. Thus, the change in the color of the marking sheet surface can intuitively reflect whether the reactor is leaking oil. The selection and design of this material ensures that the marking sheet can immediately produce obvious visual changes after contacting the insulating oil, improving the accuracy and real-time performance of oil leakage detection.

[0035] like Figure 2 As shown, further, in the above technical solution, the outer film is arranged on the outside of the inner net, and the material of the outer film is a transparent and weather-resistant plastic material, including polyethylene terephthalate film, polycarbonate or also known as plexiglass.

[0036] Furthermore, in the above technical solution, the inner net is a stainless steel wire mesh or a high molecular polymer microporous membrane, and the high molecular polymer includes polytetrafluoroethylene.

[0037] The precision filter mesh woven from stainless steel wire has an aperture that is precisely controlled to be smaller than the size of oily pigment particles, which can prevent the overflow of pigment particles without oil leakage. At the same time, due to the high strength of the wire mesh, the ability of the marker to resist mechanical stress is enhanced.

[0038] Polytetrafluoroethylene (PTFE) microporous membrane is used as the inner mesh material. The membrane has extremely high porosity control accuracy, good chemical stability and mechanical strength. It can not only effectively encapsulate the oily pigment particles, but also withstand certain mechanical pressure and temperature changes during the operation of the reactor, ensuring that the overall structure of the marker is stable and reliable.

[0039] Specifically, the principle of the utility model is: when the power grid experiences frequent voltage sags, the voltage sag control equipment can compensate the voltage in real time, the monitoring system displays the relevant DVR parameters, and the camera module is started to shoot the inductor; the oil leakage marker attached to the inductor shell is composed of a transparent outer film, an inner net and oily pigment particles. Once the insulating oil contacts the marker, the pigment particles dissolve and develop color, forming a clearly visible color change area; the high-definition camera captures the color change on the marker; the captured data is transmitted to the monitoring system in real time and stored in the memory for subsequent review and analysis; the camera can be equipped with a solar photovoltaic panel to provide a continuous and stable power supply for the equipment, ensuring the continuity and reliability of the monitoring work.

Claims

1. An inductor oil leakage monitoring device based on voltage sag, characterized in that: The invention comprises a voltage sag control device (10), a monitoring system (20), a camera (30), and an oil leakage marking sheet (40) for being attached to the housing of an inductor. The voltage sag control device (10) is arranged in the power transmission line of the inductor. The output end of the voltage sag control device (10) is electrically connected to the monitoring system (20) and is used to send a detected voltage sag signal to the monitoring system (20). The monitoring system (20) is electrically connected to the camera (30) and is used to start the camera (30) to take pictures according to the parameters of the voltage sag control device (10). The camera (30) is used to The position of the oil leakage marking sheet (40) is photographed. There are a plurality of oil leakage marking sheets (40), each comprising a transparent outer film (41) and an inner net (42) coated with adhesive. Oily pigment particles are filled between the outer film (41) and the inner net (42). The mesh of the inner net (42) is smaller than the size of the oily pigment particles. The oil leakage marking sheet (40) is used to be attached to a position of the inductor that is prone to oil leakage. A memory is provided inside the monitoring device. The memory is electrically connected to the monitoring system (20) and the camera (30) and is used to store image data photographed by the camera (30).

2. The inductor oil leakage monitoring device based on voltage sag according to claim 1, characterized in that: It also includes a solar photovoltaic panel installed outside the inductor housing, which is used to provide power to the camera (30), and the solar photovoltaic panel is arranged on the top and side wall of the inductor housing.

3. The inductor oil leakage monitoring device based on voltage sag according to claim 2, characterized in that: The locations of the inductor that are prone to oil leakage specifically include the joints of the box cover gap, the flange connection, and the welding points of the shell.

4. The inductor oil leakage monitoring device based on voltage sag according to claim 3 is characterized in that: There are one or more cameras (30), which are fixed on the top or side of the inductor, with their lenses facing the inductor housing, and are used to capture the oil leakage marking sheet (40) area.

5. The inductor oil leakage monitoring device based on voltage sag according to claim 4, characterized in that: The oily pigment particles are made of a material that is compatible with the insulating oil used inside the inductor, wherein the insulating oil is made of mineral insulating oil or silicone oil.

6. The inductor oil leakage monitoring device based on voltage sag according to claim 1, characterized in that: The voltage sag management device (10) comprises a dynamic voltage restorer (DVR) device.

7. The inductor oil leakage monitoring device based on voltage sag according to claim 6, characterized in that: The outer film (41) is arranged on the outside of the inner net (42), and the material of the outer film (41) includes: PET film or organic glass.

8. The inductor oil leakage monitoring device based on voltage sag according to claim 7, characterized in that: The inner net (42) is a stainless steel wire mesh or a high molecular polymer microporous membrane.

Images