KR102267334B1 - Detecting method of power equipment insulator releasing gas and portable detecting apparatus using the same - Google Patents

Abstract

The present invention relates to a method for detecting decomposition gas of an insulator in power equipment and a portable detecting device using the same to easily, simply and accurately diagnose the state of the power equipment on the site. The method for detecting decomposition gas of an insulator in power equipment according to an embodiment of the present invention includes a step of injecting, into a detection tube, decomposition gas of the power equipment in a set amount determined according to the detection tube; a step of detecting a color change due to reaction between an inner filling of the detection tube and the decomposition gas to measure a color change length; and a step of converting and outputting the color change length into a gas concentration.

Description

A method for detecting decomposition gas of power equipment insulation and a portable detection device using the same {DETECTING METHOD OF POWER EQUIPMENT INSULATOR RELEASING GAS AND PORTABLE DETECTING APPARATUS USING THE SAME}

The present invention relates to a method for detecting decomposition gas of power equipment insulation and a portable detection device using the same, and more particularly, it is possible to preferentially screen for the state of power equipment by detecting decomposition gas of insulation material of power equipment at the site where the power equipment is installed. By doing so, it relates to a method for detecting a decomposition gas of an insulator in a power facility and a portable detection device using the same for easily, simply and accurately diagnosing the state of power facilities in the field.

In general, a gas sensor absorbs a specific molecule and reaction or energy contained in a gas and converts it into an electrical signal according to its concentration to display a result, for example, a semiconductor type, an electrochemical type, a catalytic combustion type, an optical type, etc. have.

Specifically, the semiconductor-type sensor operates by sensing a change in resistance of a metal oxide according to a reaction with a gas, and for example, detects a gas such as _{CO, NO 2} , SO ₂ , H _{2 S, and VOC.}

In such a semiconductor sensor, the amount of oxygen on the surface of the metal oxide changes through adsorption and reaction of gas on the surface of the metal oxide, and accordingly, the potential barrier on the surface of the metal oxide changes and the electrical conductivity changes to generate an electrical signal.

That is, the metal oxide reacts with the reactant gas to lose oxygen and is reduced to become metallic, so that the flow of electricity becomes more favorable and the electrical signal is changed.

Such a semiconductor-type sensor has a simple configuration of a detection circuit, is easy to manufacture, can be mass-produced, and can detect various gases. However, in the semiconductor type sensor, interference by a gas other than the target occurs and it is difficult to accurately detect the gas concentration.

Next, the electrochemical sensor operates by sensing a change in the electromotive force between the reference electrode and the reaction by the reaction with the gas, for example, CO, CO ₂ , O ₃ , SO ₂ , NO _x , gas such as VOC, etc. detect

This electrochemical sensor detects a change in current value generated by oxidation and reduction reactions at the anode and cathode as the target gas reacts.

Therefore, the electrochemical sensor is composed of two electrodes where the reaction takes place, an electrolyte through which hydrogen ions move, and a separator that protects the inside of the sensor and allows the external target gas to move to the electrode.

In addition, the electrochemical sensor is divided into a galvanic cell method and a constant potential electrolysis method. The principle of the reaction is that hydrogen ions generated by the reaction occurring at the electrode move through the electrolyte, and electrons move through the external circuit. Then, the electrochemical sensor detects an electrical signal according to the movement of electrons moving through the external circuit.

Such an electrochemical sensor has excellent sensitivity, good stability, small size, and high selectivity. However, since the shelf life of the electrochemical sensor is limited from 6 months to 1 year, the performance deteriorates significantly with aging of the sensor, and although the gas selectivity is increasing, it is still being interfered with by other gases.

Next, the catalytic combustion sensor detects the change in resistance of the heating wire due to the exothermic reaction with the combustible gas, and detects the combustible gas (eg, H ₂ , CH ₄ , C ₃ H ₈ , C ₄ H _{10 ,} etc.) .

Such a catalytic combustion sensor detects a change in reaction heat or combustion heat generated when combustible gas reacts with oxygen into an electrical signal.

Therefore, the catalytic combustion sensor has a built-in heating wire in the porous ceramic, and heats and maintains the carrier to about 350°C by applying power to the heating wire. At this time, when the combustible gas comes into contact with the heated carrier, it reacts with oxygen to generate a combustion reaction, which causes the bead temperature to rise, thereby increasing the electrical resistance value of the platinum wire (Pt wire).

This catalytic combustion sensor has excellent linearity according to the gas concentration, is not affected by incombustible gas, has a fast response speed, and has a short initial stabilization time. However, the catalytic combustion sensor is greatly affected by humidity and it is difficult to detect high concentration gas.

Next, the optical sensor detects a change in infrared absorption due to a gas, for example, CO, CO ₂ , NO, NO ₂ , SO ₂ , O ₂ , C _x H _{y ,} and the like.

In such an optical sensor, a non-dispersive infrared (NDIR) method is most commonly used as a method of measuring the light absorption of gas molecules and converting it into a concentration. In this NDIR method, the gas concentration is measured from the reduction of the electrical signal according to the degree of infrared light absorption in the characteristic gas by using an infrared bandpass filter existing between the infrared light source and the infrared sensor.

The NDIR sensor has advantages such as high measurement precision, quick response time, and low power consumption compared to the electrochemical type, and is mainly used for carbon dioxide measurement by applying a band pass filter of 4.26㎛. However, it is difficult to carry and operate the NDIR sensor directly in the field due to its slow response, large size, and high price.

However, the gas sensor for detecting the decomposed gas in the gas insulation device needs to be implemented as a portable device for detecting the gas generated inside the power facility in the field and diagnosing the abnormality of the power facility. In this case, the weight of the equipment should be light so that it can be used as a portable device, and it is necessary to apply a method that can measure other gas products in addition to the gas generated from the power facility.

Korean Patent Publication No. 10-2012-0071381

An object of the present invention is to detect the decomposition gas of the power facility at the site where the power facility is installed to enable preferential screening of the condition of the power facility, thereby diagnosing the condition of the power facility in the field easily, simply and accurately. An object of the present invention is to provide a method for detecting decomposition gas and a portable detection device using the same.

A method for detecting decomposition gas of power equipment insulation material according to an embodiment of the present invention comprises: injecting decomposition gas of power equipment into the detection tube at a set capacity determined according to the detection tube; measuring a color change length by detecting a color change due to a reaction between the internal filling of the detection tube and the decomposition gas; and converting the color change length into gas concentration and outputting it.

The injecting of the decomposition gas may include injecting the decomposition gas using a mass flow controller (MFC).

The set capacity and the internal filling material may be determined according to the gas type and gas concentration to be detected through the detection tube.

The decomposition gas may be generated by decomposition of a gas insulator or a solid insulator of the power facility.

The gas insulator may be SF ₆ gas, and the solid insulator may be any one of PET film, press board, and NOMEX insulating paper.

The measuring the color change length may include detecting the color change of the detection tube using a photodetector.

In the step of measuring the color change length, when the end of the color change layer in the detection tube is flat using the photodetector, the value of the end portion of the color change layer is detected with a color change scale, and the photodetector is used. Thus, when the end of the color-changing layer in the detection tube is oblique, the intermediate value of the oblique portion of the color-changing layer is detected by the color change scale, and the color of the end of the color-changing layer is light in the detection tube using the photodetector. In this case, an intermediate value between the ends of the light discoloration layer and the dark discoloration layer of the discoloration layer may be detected using a color change scale.

In addition, according to an embodiment of the present invention, there is provided a portable detection device, comprising: at least one processor; and a memory for storing computer readable instructions, wherein the instructions, when executed by the at least one processor, cause the portable detection device to power the detector tube at a set capacity determined by the detector tube. The decomposition gas of the facility is injected, the color change length is measured by detecting the color change due to the reaction of the internal filling material of the detection tube and the decomposition gas, and the color change length is converted into gas concentration and output. can

According to the embodiment, MFC (Mass Flow Controller) for constantly injecting the decomposition gas to the set capacity; may further include.

According to an embodiment, a photodetector for detecting a color change of the detection tube; may further include.

The photodetector, when the end of the color-changing layer in the detection tube is flat, detects the value of the end of the color-changing layer with a color change scale, and when the end of the color-changing layer in the detection tube is oblique, the color change The intermediate value of the oblique portion of the layer is detected with the color change scale, and when the color at the end of the color change layer in the detection tube is light, the intermediate value between the ends of the light color change layer and the dark color change layer of the color change layer is used on the color change scale may be detected as

According to the embodiment, the detection tube holder for opening and mounting and fixing both ends of the detection tube; may further include.

One end of the detector tube is mounted on the detector tube holder and fixed, and then connected to the MFC through an inlet line, and the other end of the detector tube is a vent line through which the decomposed gas reacted with the internal filling material is discharged. can

The MFC and the detector tube holder may be configured in a plurality of sets to detect a plurality of gas types at once.

In addition, as a computer-readable storage medium in which a program code is recorded according to an embodiment of the present invention, the operation of injecting the decomposition gas of the power facility into the detection tube to a set capacity determined according to the detection tube; measuring a color change length by detecting a color change due to a reaction between the internal filling of the detection tube and the decomposition gas; and an operation of converting the color change length into a gas concentration and outputting it; it may be a computer-readable storage medium in which a program code for executing a method for detecting a decomposition gas of an insulator in a power facility is recorded.

The present invention enables the preferential screening of the state of the electric power equipment by detecting the decomposition gas of the electric power equipment at the site where the electric power equipment is installed, so that it is possible to easily, simply and accurately diagnose the state of the electric power equipment in the field.

In addition, the present invention is to detect the deteriorating product gas generated during abnormal phenomena such as discharge and overheating of a gas insulated device including a gas insulated transformer and a gas insulated switchgear. It is possible to increase the accuracy and reliability of the result value by reducing the error due to the experimenter and observer by measuring the color change by the image and then converting the color change length to the density value through the length measurement.

In addition, the present invention is a device that directly injects an accurate amount of gas from a gas insulation device and digitally outputs a change in color after a reaction to a detection gas with a photodetector. Problems such as the limitation of the detection gas species and gas sampling can be solved.

In addition, the present invention is a device for optically detecting the decomposed gas of a gas insulated transformer and a gas insulated switchgear, and the installation of a gas transformer in downtown areas where the load is dense is increasing, and thus the demand can continuously increase.

In addition, the present invention is a technology for easily and accurately detecting the decomposition gas of insulating materials (gas, solid) of gas insulated transformers and gas insulated switchgear in the field, and in a situation where the importance of preventive diagnosis for the stable operation of power facilities is being strengthened quickly and It can enable accurate measurement.

In addition, the present invention is _{capable of gas analysis of power facilities in which SF 6} as well as other gases are used as insulators according to the type of detection tube, and can be applied in gas detection fields in various industrial fields in a situation where work and living environments are important. can

In addition, the present invention can be applied to replace the existing portable analyzer when applied to the field analysis of the insulator decomposition gas of the gas insulation device.

In addition, the present invention can be applied to the analysis market in which gas is sampled from a pressurized gas device and gas analysis is performed through a detection tube.

In addition, since the present invention can solve each of the problems such as detection error occurrence, portability problem, and detection gas type limitation of the existing portable analyzer, when used in power equipment using gas insulated media, domestic and foreign may be in high potential demand.

1 is a view for explaining the mechanism of decomposition _{of SF 6 gas;}
2 is a view for explaining the decomposition mechanism of the PET film;
Figure 3 is a view of a portable detection device of the decomposition gas of the insulation of power equipment according to an embodiment of the present invention;
4 to 6 are views showing an example of the color change scale state of the detection tube;
7 is a view showing the result of converting the color change length of the inner filler to the gas concentration;
8 is a view of a gas sensor resistance measurement method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, detailed descriptions of well-known functions or configurations that may obscure the gist of the present invention in the following description and accompanying drawings will be omitted. Also, it should be noted that throughout the drawings, the same components are denoted by the same reference numerals as much as possible.

The terms or words used in the present specification and claims described below should not be construed as being limited to conventional or dictionary meanings, and the inventor shall appropriately define his or her invention in terms of the best way to describe it. Based on the principle that it can be done, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all the technical ideas of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.

In the accompanying drawings, some components are exaggerated, omitted, or schematically illustrated, and the size of each component does not fully reflect the actual size. The present invention is not limited by the relative size or spacing drawn in the accompanying drawings.

When a part "includes" a certain element throughout the specification, this means that other elements may be further included, rather than excluding other elements, unless otherwise stated. In addition, when a part is said to be "connected" with another part, it includes not only the case where it is "directly connected" but also the case where it is "electrically connected" with another element interposed therebetween.

The singular expression includes the plural expression unless the context clearly dictates otherwise. Terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, and includes one or more other features, number, or step. , it should be understood that it does not preclude in advance the possibility of the existence or addition of an operation, component, part, or combination thereof.

Also, as used herein, the term “unit” refers to a hardware component such as software, FPGA, or ASIC, and “unit” performs certain roles. However, "part" is not meant to be limited to software or hardware. A “unit” may be configured to reside on an addressable storage medium and may be configured to refresh one or more processors. Thus, by way of example, “part” includes components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays and variables. The functionality provided within components and “parts” may be combined into a smaller number of components and “parts” or further divided into additional components and “parts”.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the embodiments of the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view _{for explaining the decomposition mechanism of SF 6} gas, Figure 2 is a view for explaining the decomposition mechanism of the PET film.

Insulation materials used inside power facilities (eg, gas insulated transformers, gas insulated switchgear, etc.) may be gaseous or solid. For example, the gas insulator may be SF ₆ gas, and the solid insulator may be any one of PET film, press board, and NOMEX insulating paper.

These insulators may decompose and generate gas when partial discharge, arc discharge, overheating, or abnormal phenomena occur inside the power facility.

In particular, referring to FIG. 1 , the SF _{6 gas generates decomposition gases such as SO 2} , SOF ₂ , and HF due to high temperature or discharge, and referring to FIG. 2 , the PET film is deteriorated at high temperature to CO, CO ₂ , acetaldehyde It generates decomposition gases such as (Acetaldehyde, CH3CHO).

This decomposition gas may act with other insulators or components inside to reduce the insulation characteristics of the power facility, thereby causing abnormalities in the power facility. Accordingly, it is essential for power facilities to detect and manage the generation of insulator decomposition gas at an early stage.

In general, the decomposition gas can be detected using a gas chromatography method. However, in the gas chromatography method, it is difficult for an operator to easily detect the decomposed gas in the field because the equipment is expensive and the operating conditions are difficult.

Hereinafter, with reference to FIG. 3 to be described later, a portable detection device for decomposition gas of power equipment insulation material according to an embodiment of the present invention capable of easily and accurately detecting decomposition gas at a site where power equipment is installed will be described.

Figure 3 is a view of a portable detection device of the decomposition gas of the insulating material of the power facility according to an embodiment of the present invention.

As shown in Figure 3, the portable detection device (hereinafter referred to as 'portable detection device', 100) of the decomposition gas of the insulation of the power facility according to the embodiment of the present invention, the decomposition gas of the insulation of the power facility at the site where the power facility is installed By detecting and enabling preferential screening of the status of power facilities, it is possible to diagnose the status of power facilities easily, simply and accurately in the field.

To this end, the portable detection device 100 includes a Mass Flow Controller (MFC) 110 , a detector tube holder 120 , a detector tube 130 , a photodetector 140 , an input unit 150 , an output unit 160 , It may be implemented including the processor 170 and the memory 180 .

At this time, the portable detection device 100 connects the inlet 10 to the gas collection port of the power facility, and the decomposition gas is injected through the inlet line, and the decomposition gas processing device (not shown) located outside ) by connecting the outlet (20) to the decomposition gas is discharged through a vent line (vent line).

Specifically, the MFC 110 constantly injects the insulator decomposition gas of the power facility injected through the inlet 10 into the detection tube 130 at a set capacity determined by the detection tube 130 . In this case, the MFC 110 may be controlled by the processor 170 . The processor 170 may transmit control information for setting the set capacity to the MFC 110 .

This MFC 110 makes it possible to reduce measurement errors by maintaining a constant gas volume injected into the detection tube 130 compared to a gas collector manually pumped by field workers. At this time, the MFC 110 allows the decomposition gas to pass through the detection tube 130 while injecting the decomposition gas into the detection tube 130 .

In addition, the minimum gas capacity required for measurement in the detection tube 130 is 50 to 100 ml corresponding to the number of injections per one time, and the number of injections is indicated in the general detection tube 130 .

Therefore, the set capacity of the MFC 110 , that is, the actual gas capacity injected into the detection tube 130 is determined according to the detection tube 130 , and is adjusted in proportion to the number of injections displayed on the detection tube 130 . For example, when the number of injections is 2, the set capacity of the MFC 110 may be set to a total of 200 ml (ie, 2×100 ml). The set capacity of the MFC 110 may vary depending on the type of the detection tube 130 .

Next, the detection tube holder 120 is mounted and fixed by opening both ends of the detection tube 130, a rubber sealing part (not shown) in order to prevent gas leakage at both ends of the detection tube 130 . can be provided. Here, the sealing unit seals between the open portions of both ends of the detection tube 130 and the gas line (ie, the inlet line and the vent line).

In addition, the sensor tube holder 120 has a hole (not shown) formed on the side opposite to the photodetector 140 by which the photodetector 140 can check the color change of the inner filling of the detection tube 130 . .

Next, the detection tube 130 reacts with the decomposition gas injected through the MFC 110 and the internal filler to change color. That is, the detection tube 130 detects the gas characteristics by observing a color change between the decomposed gas injected through the MFC 110 and the internal filler.

The detection tube 130 is stored at both ends in a sealed state, and is used by being mounted on the detection tube holder 120 with both ends opened. In addition, one end of the detection tube 130 is connected to the MFC 110 , and the decomposition gas is injected from the MFC 110 , and the decomposition gas reacted with the internal filling material is discharged from the other end of the detection tube 130 .

Here, the detection tube 130 is selected and applicable according to the type of gas to be detected (eg, SO ₂ , HF, CO ₂ , CO, etc.) and gas concentration (eg, 1 to 25 ppmv, 20 to 200 ppmv, etc.) . Accordingly, the characteristics of the inner filling of the detection tube 130 are specified according to the gas type and gas concentration.

On the other hand, in order to help the understanding of the color change between the gas and the internal filling in the detection tube 130, _{SO 2} generated by the decomposition _{of SF 6 gas, which is a gas insulator, and CO 2} and CO generated by the decomposition of a solid insulator. A brief look at the reaction mechanism of the inner filling of the detection tube 130 for the. A coefficient of variation for the detection of each detection tube 130 corresponds to 5 to 10%.

First, the SO ₂ detector tube may represent the reaction mechanism of the internal packing as in Formula 1. The _{color that appears before the reaction of the SO 2} detector tube is blue purple, and the color that appears after the reaction is white. The analysis range is 0.25 to 10 ppm, and the detection limit is 0.02 ppm. If the field worker pumps the gas extractor manually, two pumps are required. The inner filling of the SO _{2 detection tube contains I 2} and H ₂ O.

Next, the CO ₂ detector tube may represent the reaction mechanism of the internal packing as shown in Chemical Formula 2. The _{color that appears before the reaction of the CO 2} detector tube is pale blue, and the color that appears after the reaction is purple. The analysis range is 300-5000 ppm, and the detection limit is 30 ppm. If the field worker pumps the gas extractor manually, one pump is required. The inner filling of the CO _{2 detector tube contains N 2} H ₄ .

Next, the CO detection tube may represent the reaction mechanism of the internal packing as in Formula 3. The color that appears before the reaction of the CO detector is yellow, and the color that appears after the reaction is black brown. The analysis range is 25-1000 ppm, and the detection limit is 1 ppm. If the field worker pumps the gas extractor manually, one pump is required. The inner filling of the CO detector tube contains Na ₂ Pd(SO ₃ ) ₂ .

Meanwhile, the MFC 110 and the detection tube 130 may be configured as a set to detect one gas type, and may be configured as a plurality of sets to detect a plurality of gas types at once.

Through this, the portable detection device 100 detects the deterioration product without the need to develop or manufacture a new product to detect the deterioration product in the future when the deterioration core material of the power facility is changed or the insulator is replaced with an eco-friendly insulator. It means that it is possible to respond to a new deterioration core material by applying only the detection tube 130 .

Next, the photodetector 140 detects a color change of the inner filling in the detection tube 130 . At this time, the photodetector 140 detects a color change of the detection tube 130 by photographing an image in the visible light region. The photodetector 140 may reduce errors that may occur when a field worker directly reads the color change scale of the detection tube 130 . The processor 170 may receive detection information for detecting a color change of the detection tube 130 from the photodetector 140 .

Specifically, the color change scale of the detection tube 130 may appear as shown in FIGS. 4 to 6 . 4 to 6 are views showing an example of the color change scale state of the detection tube.

Referring to FIG. 4 , when the end of the color change layer is flat, the value of the end of the color change layer is selected, and the measured value of the color change scale is 5.

Referring to FIG. 5 , when the tip of the color change layer is oblique, the intermediate value of the oblique portion of the color change layer is selected, and the measured value of the color change scale becomes 5, which is an intermediate value between 4 and 6.

Referring to FIG. 6 , when the color at the end of the color change layer is light, an intermediate value between the ends of the light color change layer and the dark color change layer is selected, and the measured value of the color change scale is 5, which is an intermediate value between 4 and 6.

The color change scale of the detector tube 130 may occur in three cases as shown in FIGS. 4 to 6 , but in general, reaction and discoloration hardly occur as in the case of FIG. 4 , and mainly reacts as shown in FIGS. 5 and 6 . and discoloration.

However, in the case of FIGS. 5 and 6, if a field worker directly reads the scale, there is room for significant deviation, so the photodetector 140 constantly detects the color change scale of the detection tube 130 constantly. error can be reduced.

Next, the input unit 150 is for receiving information from a field worker, and may be a mechanical input means or a touch input means.

Here, the mechanical input means may be, for example, a button, a dome switch, a jog switch, a jog wheel, etc. located on the front/rear or side of the portable detection device 100 .

In addition, the touch input means consists of a virtual key, a soft key, or a visual key displayed on the touch screen through software processing, or a touch key ( touch key).

Next, the output unit 160 is for outputting information in the form of a display in which field workers can confirm, for example, a liquid crystal display (LCD), a thin film transistor-liquid crystal display (LCD) , TFT LCD), organic light-emitting diode (OLED), flexible display (flexible display), three-dimensional display (3D display), can be implemented as an e-ink display (e-ink display).

The output unit 160 may be implemented in the form of a touch screen panel by forming a layer structure with each other or integrally with the touch input means.

On the other hand, the portable detection device 100 includes at least one processor 170 and a memory 180 for storing computer readable instructions, but in FIG. 8 , the detection of decomposition gas of power equipment insulator according to an embodiment of the present invention do the method

When the computer readable instructions stored in the memory 180 are executed by at least one or more processors 170, the portable detection device 100 performs the detection method of the decomposition gas of the power equipment insulation material according to the embodiment of the present invention. .

That is, when the computer readable instructions stored in the memory 180 are executed, the processor 170 measures the color change length of the internal filling material detected through the photodetector 140 as the decomposition gas is injected into the detection tube. , as shown in FIG. 7 , the gas concentration according to the color change length is converted and output through the output unit 160 . 7 is a view showing the result of converting the color change length of the inner filler to the gas concentration.

7 (a) shows the result of converting the gas concentration to 1250 ppm according to the color change length of the inner filler, and FIG. 7 (b) shows the result of converting the gas concentration to 160 ppm according to the color change length of the inner filler. indicates.

Since the gas concentration conversion result for the color change length of the internal filling material can be prepared in advance in the form of a table in the memory 180 , the processor 170 inquires the table stored in the memory 180 to easily check the color change length of the internal filler material. It is possible to convert the gas concentration corresponding to .

At this time, the processor 170 controls the MFC 110 to inject the decomposition gas into the inside of the detection tube 130 at a set capacity. The processor 170 may set a set dose to be injected into the detection tube 130 according to the type of the detection tube 130 input through the input unit 150 .

Here, the processor 170 is at least one processor, and may also be referred to as a controller, a microcontroller, a microprocessor, a microcomputer, or the like. In addition, the processor 170 may be implemented by hardware or firmware, software, or a combination thereof.

Also, the memory 180 may be a single storage device, or may be a collective term for a plurality of storage elements. The computer readable instructions stored in the memory 180 may be executable program code or parameters, data, and the like. In addition, the memory 180 may include random access memory (RAM) or non-volatile memory (NVRAM) such as magnetic disk storage or flash memory.

Hereinafter, a gas sensor resistance measurement method according to an embodiment of the present invention will be described in detail with reference to FIG. 8 to be described later.

8 is a view of a gas sensor resistance measurement method according to an embodiment of the present invention.

Referring to FIG. 8 , the portable detection device 100 constantly injects the decomposition gas at a set capacity determined according to the detection tube 130 into the detection tube 130 through the MFC 110 ( S201 ). Here, the set capacity is determined according to the type of the detection tube 130 , and is determined according to the gas type and gas concentration to be detected through the detection tube 130 .

Thereafter, the portable detection device 100 detects a color change due to a reaction between the internal filling of the detection tube 130 and the decomposition gas through the photodetector 140 (S202). At this time, the portable detection device 100 measures the color change length of the inner filling (S203).

In this way, the portable detection device 100 detects the color change of the internal filling material according to a certain standard by using the photodetector 140, so that the generation of measurement errors in reading the scale of the detection tube 130 by the field worker can be solved. there will be In this case, since the portable detection apparatus 100 can detect a plurality of gases at once, the on-site analysis time can be reduced.

Then, the portable detection device 100 converts the color change length of the inner filling into a gas concentration and outputs it (S204).

The method according to some embodiments may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CDROMs and DVDs, and magneto-optical disks such as floppy disks. hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like.

Although the foregoing description has focused on novel features of the invention as applied to various embodiments, those skilled in the art will recognize the apparatus and method described above without departing from the scope of the invention. It will be understood that various deletions, substitutions, and changes are possible in the form and details of Accordingly, the scope of the present invention is defined by the appended claims rather than by the above description. All modifications within the scope of equivalents of the claims are included in the scope of the present invention.

10 ; inlet 20 ; outlet
110 ; MFC (Mass Flow Controller) 120 ; detector tube holder
130 ; detection tube 140 ; photodetector
150 ; input 160 ; output
170 ; processor 180 ; Memory

Claims (18)

injecting the decomposition gas of the power facility into the detection tube at a set capacity determined according to the detection tube;
measuring a color change length by detecting a color change due to a reaction between the internal filling of the detection tube and the decomposition gas; and
Including; converting the color change length into gas concentration and outputting it;
In the injection step, the amount of the injected decomposition gas is maintained constant,
In the measuring step, an image is taken in the visible light region of the detection tube, and a color change length is detected from the color scale of the color-changing layer of the detection tube using a photodetector,
When the end of the color-changing layer is flat, the end value of the color-changing layer is selected as the color change scale, and when the end of the color-changing layer is oblique, the intermediate value of the bevel is selected, and when the color of the end of the color change layer is light, A method for detecting decomposition gas of power equipment insulation, characterized in that the intermediate value of the end of the light discoloration layer and the dark discoloration layer of the discoloration layer is selected as a color change scale.
The method of claim 1,
The step of injecting the decomposition gas,
A method of detecting decomposition gas of power equipment insulators by injecting the decomposition gas using a MFC (Mass Flow Controller).
3. The method of claim 2,
The set capacity and the internal filling material,
A method of detecting a decomposition gas of an insulating material of a power facility that is determined according to the gas type and gas concentration to be detected through the detection tube.
The method of claim 1,
The decomposition gas is
A method of detecting a decomposition gas of a power facility insulator that is generated by decomposition of a gas insulator or a solid insulator of the power facility
5. The method of claim 4,
The gas insulator is SF ₆ gas,
The solid insulator is a PET film, a press board, a NOMEX insulation paper, any one of the power facility insulation decomposition gas detection method.
delete delete A portable detection device comprising:
at least one processor; and
a memory for storing computer readable instructions;
The instructions, when executed by the at least one processor, cause the portable detection device to:
The decomposition gas of the power facility is injected into the detection tube with a set capacity determined according to the detection tube,
To measure the color change length by detecting the color change by the reaction of the internal filling of the detection tube and the decomposition gas,
to convert the color change length into gas concentration and output,
The injection amount of the decomposition gas is kept constant at the set capacity,
The color change length measurement is performed by photographing an image in the visible light region of the detection tube, and detecting the color change length from the color scale of the color change layer of the detection tube using a photodetector, but when the end of the color change layer is flat, the color change The value at the end of the layer is selected as the color change scale, and when the end of the color change layer is beveled, the middle value of the bevel is selected. A portable detection device, characterized in that the intermediate value of the end of the color change layer is selected as a color change scale.
9. The method of claim 8,
A portable detection device further comprising a; MFC (Mass Flow Controller) for injecting the decomposition gas.
10. The method of claim 9,
The set capacity and the internal filling material,
A portable detection device that is determined according to the gas type and gas concentration to be detected through the detection tube.
9. The method of claim 8,
The decomposition gas is
A portable detection device that is generated by the decomposition of gas insulators or solid insulators of the power equipment.
12. The method of claim 11,
The gas insulator is SF ₆ gas,
The solid insulating material is a PET film, a press board, a portable detection device of any one of NOMEX insulating paper.
delete delete 10. The method of claim 9,
The portable detection device further comprising a; detector tube holder for mounting and fixing by opening both ends of the detector tube.
16. The method of claim 15,
One end of the detector tube is connected to the MFC through an inlet line after being mounted and fixed in the detector tube holder,
The other end of the detection tube is a portable detection device in which the decomposition gas that has reacted with the internal packing material is discharged through a vent line.
16. The method of claim 15,
The MFC and the detector tube holder,
A portable detection device comprising a plurality of sets and detecting a plurality of gas types at once.
A computer readable storage medium having program code recorded therein,
an operation of injecting the decomposition gas of the power facility into the detection tube with a set capacity determined according to the detection tube;
measuring a color change length by detecting a color change due to a reaction between the internal filling of the detection tube and the decomposition gas; and
converting the color change length into gas concentration and outputting it; including,
In the injection operation, the amount of decomposition gas is maintained constant,
In the measurement operation, an image is taken in the visible light region of the detection tube, and a color change length is detected from the color scale of the color-changing layer of the detection tube using a photodetector,
When the end of the color-changing layer is flat, the end value of the color-changing layer is selected as the color change scale, and when the end of the color-changing layer is oblique, the intermediate value of the bevel is selected, and when the color of the end of the color change layer is light, A computer-readable storage medium recording a program code for executing a method for detecting decomposition gas of power equipment insulation, characterized in that the intermediate value of the end of the light color-changing layer and the dark color-changing layer of the color-changing layer is selected as a color change scale.

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