One-touch type External Partial Discharge Diagnostic Sensor Fixture and Fixing Method thereof

Abstract

The one-touch type external partial discharge diagnostic sensor fixing device and sensor fixing method of the present invention are provided with the feature that the magnetic force of the magnet (40) and the elasticity of the fixing cloth (20) are combined so that the shielding cloth (30) of the sensor cover (10) blocks electromagnetic waves and the fixing cloth (20) maintains a tensioned state in which the external partial discharge diagnostic sensor (100) is wrapped by the elasticity of the fixing cloth (20), thereby allowing the sensor to be mounted on the outside of the GIS tank. In particular, the sensor cover (10) is combined with the shielding cloth (30) for electromagnetic wave blocking, thereby providing a noise (i.e., noise) blocking effect when measuring partial discharge.

Description

Technology Field

[0001] The present invention relates to an external partial discharge diagnostic sensor, and more specifically, to a one-touch type external partial discharge diagnostic sensor fixing device and a sensor fixing method that can be installed outside a GIS tank using the fixing force of a magnet. Background Technology

[0002] Generally, a Gas Insulated Switchgear (GIS) is a composite switchgear insulated with SF6 gas that safely opens and closes the line not only under normal operating conditions but also under abnormal conditions such as faults and short circuits, thereby properly protecting the system under operating conditions for indoor and outdoor substations.

[0003] Therefore, the above GIS is sealed with a metal box using SF6 gas, and includes switching equipment and wires such as a disconnect switch (DS), grounding switch (ES), and circuit breaker (CB) inside the box. The health status of the GIS is verified by periodically detecting partial discharge signals generated inside the GIS through a partial discharge diagnostic sensor (e.g., UHF (Ultra-high frequency) sensor).

[0004] For example, the aforementioned partial discharge diagnostic sensor is a sensor that detects UHF band electromagnetic signals emitted when partial discharge occurs. Depending on the mounting method, it is classified into an internal sensor (i.e., inside the tank) and an external sensor (i.e., outside the tank). The internal sensor can take measurements by connecting only a coaxial cable to the partial discharge diagnostic equipment, whereas the external sensor takes measurements after fixing the sensor to a spacer (i.e., an epoxy insulating material), which is the only part of the tank capable of acquiring internal electromagnetic signals.

[0005] Referring to the fixing method of FIG. 1, the external partial discharge diagnostic sensor (100) is a method of attaching multiple layers of rubber bands (200) to tank bolts (330) protruding above and below that fix the spacer (310) of the GIS tank (300). In this case, the spacer (310) is a non-magnetic part made of epoxy insulating material that allows for internal dustproof signal measurement.

[0006] However, the fixing method of the external partial discharge diagnostic sensor (100) using the above rubber band (200) has the following problems.

[0007] First, the work efficiency is reduced because the fixing process takes a long time, and especially because the number of times it is hung is inconsistent depending on the elasticity of the rubber band (200). Second, when the location to be diagnosed is the upper part of the GIS or installed in a narrow space, there is a risk of safety accidents such as falling or getting caught by the worker during the work. Prior art literature

[0008] Korean Registered Patent KR 10-1665458 B The problem to be solved

[0009] Accordingly, the present invention, taking into account the above points, aims to provide a one-touch type external partial discharge diagnostic sensor fixing device and a sensor fixing method that combines the elasticity of a magnet and a cover to surround an external sensor and is fixed to the outside of a GIS tank through the fixing force of the magnet, and in particular, through the combination of a cover and a shielding cloth, also has a noise blocking effect during partial discharge measurement. means of solving the problem

[0010] The one-touch type external partial discharge diagnostic sensor fixing device of the present invention for achieving the above purpose comprises: a sensor cover that elastically wraps the external partial discharge diagnostic sensor; and a magnet that generates magnetic force provided in the sensor cover and attached to a magnetic part of a GIS tank, wherein the magnetic force strength of the magnet maintains the tension state of the sensor cover so that the external partial discharge diagnostic sensor is mounted on the GIS tank.

[0011] Preferably, the sensor cover has a perforation where the connector of the external partial discharge diagnostic sensor is located, is formed in a left-right symmetrical shape with the perforation as the center, and is made of silicone material to provide elasticity.

[0012] Preferably, the magnet is provided on the sensor cover at a position separated from the lower part of the external partial discharge diagnostic sensor by the length of the spacer.

[0013] Preferably, the magnet is fixed to the sensor cover by screw or stitching and consists of a first magnet and a second magnet, positioned at both ends of the sensor cover.

[0014] In addition, the one-touch type external partial discharge diagnostic sensor fixing device of the present invention for achieving the above purpose comprises: a sensor cover that wraps the external partial discharge diagnostic sensor with elasticity; and a magnet that generates magnetic strength to maintain the tension state of the sensor cover and is attached to the magnetic part of the GIS tank, wherein the sensor cover is composed of a fixing cloth made of silicone material that generates the elasticity and a shielding cloth that blocks electromagnetic waves.

[0015] Preferably, the fixed cloth and the shielding cloth have a perforation where the connector of the external partial discharge diagnostic sensor is located, and have a left / right symmetrical shape with the perforation as the center.

[0016] Preferably, the shielding cloth is coated with nickel and copper on a polyester fabric.

[0017] Preferably, the shielding cloth is positioned on one side of the fixed cloth, and the width of the shielding cloth is shorter than the width of the fixed cloth, and the difference in width between the fixed cloth and the shielding cloth forms a shielding cloth processing limit length so that the magnet is positioned.

[0018] Preferably, the magnet is provided on the fixing cloth at a position separated from the lower part of the external partial discharge diagnostic sensor by the length of the spacer, and consists of a first magnet and a second magnet that are fixed by screws or stitching at both ends of the fixing cloth.

[0019] And the one-touch fixing method of the partial discharge diagnostic sensor of the present invention for achieving the above-mentioned purpose is characterized by being performed in the following steps: confirming the position of a spacer in a GIS tank; setting the spacer as the installation position of an external partial discharge diagnostic sensor; attaching a sensor cover to the external partial discharge diagnostic sensor and attaching a magnet to the GIS tank while both sides of the sensor cover are stretched; and confirming the mounting state of the external partial discharge diagnostic sensor and the GIS tank by maintaining the tension state of the sensor cover with the magnetic force strength of the magnet.

[0020] Preferably, the GIS tank attaches the spacer to a connecting flange fastened with tank bolts.

[0021] Preferably, the sensor cover is attached using the connector of the external partial discharge diagnostic sensor by making a perforation, and is made of a shielding cloth that blocks electromagnetic waves and is attached to one side with a length shorter than the elastic silicone fixing cloth.

[0022] Preferably, the magnet is composed of a first magnet and a second magnet provided at both ends of the fixed cloth at a distance from the lower part of the sensor of the external partial discharge diagnostic sensor by the length of the spacer, and the first magnet and the second magnet are each attached to the side of the connecting flange of the GIS tank with the connecting flange as the magnetic part. Effects of the invention

[0023] The external partial discharge diagnostic sensor fixing device of the present invention, which allows for sensor fixing via a one-touch method, enables improved work efficiency by shortening the sensor fixing work outside the GIS tank during partial diagnosis of partial discharge in GIS, safe work in high places and confined spaces due to the ease of sensor installation, and improved diagnostic accuracy through the noise blocking effect of the cover surrounding the sensor. Brief explanation of the drawing

[0024] FIG. 1 is a fixed state of an external partial discharge diagnostic sensor according to the prior art, FIG. 2 is a configuration diagram of a one-touch type external partial discharge diagnostic sensor fixing device according to the present invention, FIG. 3 is an example of a magnetic fixing structure of a sensor fixing device according to the present invention, FIG. 4 is a state in which a one-touch type sensor fixing device is used in an external partial discharge diagnostic sensor according to the present invention, FIG. 5 is a flowchart of a one-touch type fixing method of a partial discharge diagnostic sensor according to the present invention, and FIG. 6 is an example in which a one-touch type external partial discharge diagnostic sensor fixing device according to the present invention is applied to the outside of a GIS tank. Specific details for implementing the invention

[0025] Embodiments of the present invention will be described in detail below with reference to the attached illustrative drawings. Since these embodiments are merely examples and can be implemented in various different forms by those skilled in the art to which the present invention pertains, the embodiments described herein are not limited to the examples described herein.

[0026] Referring to FIG. 1, the sensor fixing device (1) consists of a sensor cover (10) and a magnet (40).

[0027] In particular, the sensor fixing device (1) is strongly attached to the GIS tank (300) by utilizing the elasticity of the sensor cover (10) and the strong fixing force of the magnet (40), thereby shortening the fixing time of the external partial discharge diagnostic sensor (100) and completely preventing safety accidents such as falling or getting caught by a worker during the installation of the external sensor, even if the sensor is installed in a location intended for diagnosis in the upper part of the GIS or a narrow space.

[0028] Specifically, the sensor cover (10) is composed of a fixing cloth (20) and a shielding cloth (30) and has a thickness that does not reduce elasticity or flexibility for fixing the external partial discharge diagnostic sensor (100).

[0029] For example, the fixed cloth (20) is made of a silicone material that has excellent stretchability while surrounding the external sensor (100), and the shielding cloth (30) is coated with nickel and copper on a polyester fabric to have excellent electromagnetic wave blocking ability.

[0030] In particular, the shielding cloth (30) is placed on one side (i.e., the non-exposed side) of the fixed cloth (20) to provide a noise blocking effect during partial discharge measurement. In this case, the shielding cloth (30) can be placed inside the fixed cloth (20) and sewn so that the fixed cloth (20) wraps around it.

[0031] In addition, perforations (21, 31) are made at the central position in the fixed cloth (20) and the shielding cloth (30), and a connector (110) that transmits a dustproof signal from an external partial discharge diagnostic sensor (100) to the outside is exposed through the perforations (21, 31) so that a signal measuring device can be connected.

[0032] Specifically, the magnet (40) is a permanent magnet and consists of two first and second magnets (41, 42) attached to both ends of the sensor cover (10) (i.e., the fixed cloth (20)), and is attached to / fixed to the connecting flange (320) (see FIG. 6), which is a metal part of the GIS tank (300).

[0033] Meanwhile, considering the layout of the sensor cover (10), the fixed cloth (20) forms a rectangle with different widths (L) and lengths (h), and the shielding cloth (30) is made smaller in size than the fixed cloth (20).

[0034] For example, when the size of the fixed cloth (20) is defined as a horizontal length (L) and a vertical length (h), the shielding cloth (30) has a horizontal length (Lb) that is equal to the vertical length (h) of the fixed cloth (20) but shorter than the horizontal length (L) of the fixed cloth (20).

[0035] And the sensor cover (10) is formed with a left / right (or front / back) symmetrical structure with the perforations (21, 31) at the center, which is half the vertical length (h) (h / 2) and half the horizontal length (L) (L / 2), by positioning the perforations (21, 31) at the center.

[0036] Therefore, the above fixed cloth (20) has a difference in width (L-Lb) as the shielding cloth processing limit length (Lc), and the above fixed cloth (20) uses the shielding cloth processing limit length (Lc) to position the first magnet (41) on one side and the second magnet (42) on the opposite side.

[0037] Referring to FIG. 3, the first and second magnets (41, 42) are positioned at the end portion of the fixed cloth (20) at the shielding cloth processing limit length (Lc) where the shielding cloth (30) does not reach, and are integrated.

[0038] For example, the integrated structure of the first and second magnets (41, 42) and the fixed cloth (20) is formed using a fastening part (50) or a sewing part (60). The fastening part (50) is a method of directly fixing the first and second magnets (41, 42) to the end portion of the fixed cloth (20) using a screw or a snap button, and the sewing part (60) is a method of fixing the first and second magnets (41, 42) by wrapping them with a cover extension part (23) formed at the end portion of the fixed cloth (20) and then sewing the cover extension part (23) to the fixed cloth (20).

[0039] FIG. 4 is an example in which the sensor fixing device (1) is used in an external partial discharge diagnostic sensor (100).

[0040] As described above, the external partial discharge diagnostic sensor (100) is a square box with a sensor width (W) of 800mm and a sensor height (D) of 500mm, and the sensor cover (10) for this is set to L=2,600mm, h=800mm, La=800mm, Lb=2,000mm, and Lc=300mm, so that the front of the sensor is covered with 800mm (W=La) as the central section, and the sides of the sensor are covered with 900mm (1,300mm-400mm) as the respective side sections, and the sensor can be fixed using the 300mm (Lc) area equipped with first and second magnets (41,42).

[0041] In particular, the above-mentioned side section is divided into a 400mm length excluding the sensor height (D), a spacer length (Ld) of 150mm, and a magnet length (Le) of 250mm. By partially overlapping the spacer length (Ld) with the shielding cloth treatment limit length (Lc) of 300mm, a gap of 150mm is created between the bottom of the sensor and the strong magnet, thereby allowing for the consideration of differences in spacer sizes between GIS manufacturers. In this case, since the magnet length (Le) is aligned with the size of the magnet (40), it may change depending on the size of the magnet (40).

[0042] Meanwhile, referring to FIG. 5, the one-touch fixing method of the partial discharge diagnostic sensor is performed in the following steps: S1, a step of confirming the position of the GIS tank; S2, a step of setting the position of the external partial discharge diagnostic sensor; S3, a step of attaching a sensor fixing device to the sensor; S4, a step of pulling the sensor cover; S5, a step of attaching a magnet; and S6, a step of confirming the fixed state of the sensor.

[0043] Referring to FIG. 6, the GIS tank (300) is of 154kV or higher, and a spacer (310) is attached to the connection portion of the connection flange (320) fastened with a tank bolt (330). The GIS tank location verification (S1) is performed by recognizing the spacer (310), and the external partial discharge diagnostic sensor location setting (S2) is performed by positioning the sensor (100) on the spacer (310).

[0044] Next, the attachment of the sensor fixing device (S3), the pulling of the sensor cover (S4), and the attachment of the magnet (S5) are all operations in which the external partial discharge diagnostic sensor (100) is fixed to the GIS tank (300) using the sensor fixing device (1).

[0045] Therefore, in the above sensor fixing device attachment (S3), the connector (110) of the external partial discharge diagnostic sensor (100) is positioned in the perforated portion (21, 31) of the sensor cover (10) of the sensor fixing device (1), and in the above sensor cover pulling (S4), the sensor cover (10) is extended toward the tank bolt (330) located on the side of the connecting flange (320) of the GIS tank (300) using the silicone material of the fixing cloth (20), so that the fixing cloth (20) is positioned between the two tank bolts (330), and in the above magnet attachment (S5), the first and second magnets (41, 42) located at both ends of the fixing cloth (20) are attached to the side of the connecting flange (320), which is a magnetic body, with strong magnetic force.

[0046] Finally, in the sensor fixing state verification (S6), the external partial discharge diagnostic sensor (100) is stably maintained in the position of the spacer (310) without shaking or positional change in the GIS tank (300) in a magnetic fixing state of the first and second magnets (41, 42) and the connecting flange (320).

[0047] As described above, the one-touch type external partial discharge diagnostic sensor fixing device and sensor fixing method according to the present embodiment can be mounted on the outside of the GIS tank by combining the magnetic force of the magnet (40) and the elasticity of the fixing cloth (20) by attaching a magnet (40) with a magnetic force strength that maintains a tensioned state in which the fixing cloth (20) wraps the external partial discharge diagnostic sensor (100) while the shielding cloth (30) of the sensor cover (10) blocks electromagnetic waves, and in particular, by combining the sensor cover (10) with the shielding cloth (30) for blocking electromagnetic waves, it also has a noise (i.e., noise) blocking effect when measuring partial discharge. Explanation of the symbols

[0048] 1 : Sensor Fixture 10 : Sensor cover 20 : Fixed cloth 21, 31 : Perforation 23 : Cover extension 30 : Shielding cloth 40 : Magnet 41, 42: 1st and 2nd magnets 50 : Fastening part 60: Sewing section 100: External partial discharge diagnostic sensor 110 : Connector 200 : Rubber band 300 : GIS Tank 310: Spacer 320 : Connection flange 330 : Tank Bolt

Claims

Claim 1 A one-touch type external partial discharge diagnostic sensor fixing device characterized by comprising: a sensor cover that elastically wraps an external partial discharge diagnostic sensor; and a magnet that generates magnetic force and is attached to a magnetic part of a GIS tank, wherein the magnetic force strength of the magnet maintains a tensioned state of the sensor cover so that the external partial discharge diagnostic sensor is mounted on the GIS tank, and wherein the magnet is provided on the sensor cover at a position separated from the lower part of the external partial discharge diagnostic sensor by a spacer length, wherein the sensor cover is divided into a central section covering the front of the sensor and side sections covering both sides of the sensor, and a magnet is installed in each of the side sections, wherein the side sections are divided by a spacer length (Ld) and a magnet length (Le) excluding the sensor height, and by partially overlapping the spacer length (Ld) with the shielding fabric treatment limit length (Lc) to create a gap between the lower part of the sensor and the magnet, thereby accommodating differences in spacer size between GIS manufacturers. Claim 2 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 1, wherein the sensor cover has a perforated portion where the connector of the external partial discharge diagnostic sensor is located. Claim 3 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 2, wherein the sensor cover has a left / right symmetrical shape with the perforation portion as the center. Claim 4 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 1, wherein the sensor cover is made of silicone material to generate the elasticity. Claim 5 delete Claim 6 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 1, characterized in that the magnet is fixed to the sensor cover by screw fixing or sewing. Claim 7 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 1, characterized in that the magnet is composed of a first magnet and a second magnet and is located at both ends of the sensor cover. Claim 8 A one-touch type external partial discharge diagnostic sensor fixing device characterized by comprising: a sensor cover that wraps an external partial discharge diagnostic sensor with elasticity; and a magnet that generates magnetic strength to maintain the tension state of the sensor cover and is attached to a magnetic part of a GIS tank, wherein the sensor cover is composed of a fixing cloth made of silicone material that generates the elasticity and a shielding cloth that blocks electromagnetic waves, and wherein the magnet is provided on the sensor cover at a position separated from the lower part of the external partial discharge diagnostic sensor by a spacer length, wherein the sensor cover is divided into a central section that covers the front of the sensor and side sections that cover both sides of the sensor, and a magnet is installed in each of the side sections, wherein the side sections are divided by a spacer length (Ld) and a magnet length (Le) excluding the sensor height, and by partially overlapping the spacer length (Ld) with the shielding cloth processing limit length (Lc) to create a gap between the lower part of the sensor and the magnet, thereby accommodating differences in spacer sizes between GIS manufacturers. Claim 9 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 8, wherein the fixing cloth and the shielding cloth have a perforation where the connector of the external partial discharge diagnostic sensor is located, and have a left / right symmetrical shape with the perforation as the center. Claim 10 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 8, characterized in that the shielding cloth is coated with nickel and copper on a polyester fabric. Claim 11 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 8, wherein the shielding cloth is positioned on one side of the fixed cloth, the horizontal length of the shielding cloth is shorter than the horizontal length of the fixed cloth, and the difference between the horizontal lengths of the fixed cloth and the shielding cloth forms a shielding cloth processing limit length to which the magnet is positioned. Claim 12 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 8, characterized in that the magnet is provided on the fixing cloth at a position separated from the lower part of the sensor of the external partial discharge diagnostic sensor by the length of the spacer. Claim 13 A one-touch type external partial discharge diagnostic sensor fixing device according to claim 12, characterized in that the magnet comprises a first magnet and a second magnet that are fixed by screw fixing or sewing at both ends of the fixed cloth. Claim 14 The method is performed by a step of confirming the position of a spacer in a GIS tank, a step of setting the spacer as the installation position of an external partial discharge diagnostic sensor, a step of attaching a sensor cover to the external partial discharge diagnostic sensor and attaching a magnet to the GIS tank while both sides of the sensor cover are stretched, and a step of confirming the mounting state of the external partial discharge diagnostic sensor and the GIS tank by maintaining the tension state of the sensor cover by the magnetic force strength of the magnet, wherein the magnet is provided on the sensor cover at a position separated from the lower part of the external partial discharge diagnostic sensor by the length of the spacer, and the sensor cover is divided into a central section covering the front of the sensor and side sections covering both sides of the sensor, and a magnet is installed in each of the side sections, and the side sections are divided by the spacer length (Ld) and the magnet length (Le), excluding the sensor height, and by partially overlapping the spacer length (Ld) with the shielding fabric treatment limit length (Lc) to create a gap between the lower part of the sensor and the magnet, thereby addressing the difference in spacer sizes between GIS manufacturers One-touch fixing method for a partial discharge diagnostic sensor characterized by being accommodable. Claim 15 A one-touch fixing method for a partial discharge diagnostic sensor according to claim 14, characterized in that the GIS tank attaches the spacer to a connecting flange fastened with a tank bolt. Claim 16 A one-touch fixing method for a partial discharge diagnostic sensor according to claim 14, characterized in that the sensor cover is attached using a connector of the external partial discharge diagnostic sensor by drilling a perforation. Claim 17 A one-touch fixing method for a partial discharge diagnostic sensor according to claim 14, wherein the sensor cover is made of a shielding cloth that blocks electromagnetic waves and is attached to one side with a length shorter than the elastic silicone fixing cloth, and the magnet is made of a first magnet and a second magnet provided at both ends of the fixing cloth at a position separated from the lower part of the external partial discharge diagnostic sensor by the length of a spacer. Claim 18 A one-touch fixing method for a partial discharge diagnostic sensor according to claim 17, wherein the first magnet and the second magnet are each attached to the side of the connecting flange of the GIS tank with the connecting flange of the GIS tank as the magnetic part.

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