KR20180049981A - Apparatus and method for detecting partial discharge in gas insulated switchgear - Google Patents

Abstract

An apparatus for detecting partial discharge in a gas insulated switchgear according to an embodiment of the present invention includes a sensor unit including a plurality of electromagnetic wave sensors disposed at different positions of the gas insulated switchgear to sense electromagnetic waves, a high frequency switch unit for controlling a moving path of the electromagnetic wave transmitted from the sensor unit through a switching operation, a partial discharge determining unit for determining whether the partial discharge occurs in the gas insulated switchgear by receiving an electromagnetic wave signal from the high frequency switch unit and analyzing a pattern of the electromagnetic wave signal; and a generation position calculation unit for receiving the electromagnetic wave signal from the high frequency switch unit and calculating a generation position of the electromagnetic wave sensed by the sensor unit using the electromagnetic wave sensing points of the sensor unit. Accordingly, the present invention can perform a partial discharge occurrence determination operation and a partial discharge occurrence position estimation operation together.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gas insulated switchgear partial discharge detection apparatus and method,

The present invention relates to a gas insulated switchgear partial discharge detection apparatus and method.

A gas insulated switchgear (GIS) is installed in a power plant, a substation, etc., so that a large current of a high voltage flows to perform an opening / closing operation. Partial discharge (PD) may occur in the gas insulated switchgear due to a phenomenon of failure due to an internal abnormality. Partial discharge can cause dielectric breakdown of the gas insulated switchgear and can cause a great disruption to the power supply of the power plant or substation. Therefore, it is important to detect a partial discharge generated in the gas insulated switchgear to prevent an accident such as insulation breakdown.

Japanese Patent Application Laid-Open No. 10-2016-0046014

An embodiment of the present invention provides a gas insulated switchgear partial discharge detection apparatus and method capable of performing partial discharge occurrence judgment and partial discharge occurrence position estimation together.

The gas insulated switchgear partial discharge detection device according to an embodiment of the present invention includes a sensor unit including a plurality of electromagnetic wave sensors disposed at different positions of a gas insulated switchgear and sensing an electromagnetic wave; A high frequency switch unit for controlling the movement path of the electromagnetic wave signal transmitted from the sensor unit through a switching operation; A partial discharge determination unit for receiving an electromagnetic wave signal from the high frequency switch unit and analyzing a pattern of the electromagnetic wave signal to determine whether a partial discharge of the gas insulated switchgear is generated; A generating position calculator that receives an electromagnetic wave signal from the high frequency switch unit and calculates a generation position of the electromagnetic wave sensed by the sensor unit using the electromagnetic wave sensing points of the sensor unit; . ≪ / RTI >

A method of detecting a partial discharge of a gas insulated switch according to an embodiment of the present invention includes: setting an operation mode to one of a first mode and a second mode; Receiving electromagnetic wave signals from a plurality of electromagnetic wave sensors disposed at different positions of the gas insulated switchgear; Analyzing a pattern of the electromagnetic wave signal when the set operation mode is the first mode and determining whether a partial discharge of the gas insulated switch is generated; Calculating a position at which electromagnetic waves are generated in the gas insulated switchgear using the electromagnetic wave signal sensing points of the plurality of electromagnetic wave sensors when the set operation mode is the second mode; . ≪ / RTI >

The apparatus and method for detecting a partial discharge of a gas insulated switchgear according to an embodiment of the present invention can perform a partial discharge occurrence determination and a partial discharge occurrence position estimation together and perform rapid integrated detection of an intermittently generated partial discharge .

Also, the apparatus and method for partially detecting a partial discharge of a gas insulated switchgear according to an embodiment of the present invention can organically link the determination of partial discharge occurrence and the partial discharge occurrence position estimation, and the integrated detection function for partial discharge can be simplified And can provide convenience to the management of the gas insulated switchgear manager.

Also, an apparatus and method for detecting partial discharge of a gas insulated switchgear according to an embodiment of the present invention can accurately estimate a partial discharge occurrence position by reflecting an attenuation of an electromagnetic wave generated according to a partial discharge.

Also, the apparatus and method for detecting a partial discharge of a gas insulated switchgear according to an embodiment of the present invention can allow a gas insulated switchgear manager to intuitively grasp a location of a partial discharge occurrence.

FIG. 1 is a view illustrating a gas insulated switchgear partial discharge detection apparatus according to an embodiment of the present invention.
FIG. 2 is a view illustrating a gas insulated switchgear partial discharge detection apparatus according to an embodiment of the present invention.
3 is a diagram showing the arrangement of the electromagnetic wave sensor.
4 is a view showing the position of a partial discharge sensed by an electromagnetic wave sensor.
5 is a diagram showing waveforms outputted by the partial discharge judgment unit.
6 is a diagram illustrating the output of the generation position calculation unit.
7 is a flowchart illustrating a method of detecting a partial discharge of a gas insulated switch according to an embodiment of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order that those skilled in the art can easily carry out the present invention.

FIG. 1 is a view illustrating a gas insulated switchgear partial discharge detection apparatus according to an embodiment of the present invention.

1, the apparatus for detecting partial discharge of a gas insulated switchgear according to an embodiment of the present invention includes a sensor unit 110, a high frequency switch unit 120, a partial discharge determination unit 130, and a generation position calculation unit 140 ).

The sensor unit 110 may include a plurality of electromagnetic wave sensors disposed at different positions of the gas insulated switchgear to sense electromagnetic waves. The band of the electromagnetic wave sensed by the sensor unit 110 may be a UHF (Ultra High Frequency) band, and may have a detectable frequency range of 500 to 1500 MHz.

For example, the sensor unit 110 may have a shape similar to an antenna used for wireless communication, and may receive an electromagnetic wave. The sensor unit 110 may be designed to respond to an electric field or a magnetic field to generate a current or a voltage corresponding to an electric field or a magnetic field of the electromagnetic wave. You may.

Since the gas insulated switchgear may include an insulating gas such as hexafluoro-sulfur (SF ₆ ), the sensor unit 110 may be formed of a material having little chemical reaction to the insulated gas.

The high frequency switch unit 120 can control the movement path of the electromagnetic wave signal transmitted from the sensor unit 110 through the switching operation. The movement path may include a first movement path from the sensor unit 110 to the partial discharge determination unit 130 and a second movement path from the sensor unit 110 to the generated position calculation unit 140. Therefore, the high-frequency switch unit 120 can control whether the gas insulated switchgear partial discharge detection device performs partial discharge occurrence estimation or partial discharge occurrence position estimation through the switching operation.

For example, the high-frequency switch unit 120 may perform a switching operation according to an input of the gas insulated switchgear manager, may repeatedly perform a switching operation at predetermined intervals, The switching operation can be performed according to the determination result. The gas insulated switchgear partial discharge detection apparatus can organically connect the partial discharge occurrence judgment and the partial discharge occurrence position estimation on various principles according to the switching condition of the high frequency switch unit 120. [

The partial discharge determination unit 130 may determine whether a partial discharge of the gas insulated switch is generated by analyzing a pattern of an electromagnetic wave signal, which is electrically connected to the high frequency switch unit 120.

For example, the partial discharge determination unit 130 may previously store a pattern having a common waveform of an electromagnetic wave signal when a partial discharge is generated in the gas insulated switchgear, and may detect an electromagnetic wave signal transmitted from the sensor unit 110 The waveform and the previously stored waveform can be compared with each other, and it is possible to judge whether the electromagnetic wave signal transmitted from the sensor unit 110 is caused by the partial discharge according to the comparison result.

For example, when the peak value of the electromagnetic wave signal transmitted from the sensor unit 110 is greater than the reference value and the reference value is maintained for the reference time, the partial discharge determination unit 130 determines that the partial discharge is generated in the gas- have.

According to the design, the partial discharge determination unit 130 may transmit a switching signal to the high-frequency switch unit 120 when it is determined that a partial discharge has occurred in the gas insulated switchgear. The high-frequency switch unit 120 receiving the switching signal can perform the switching operation and transmit the electromagnetic wave signal to the generated position calculation unit 140. Thus, the gas insulated switchgear partial discharge detection device can perform rapid integrated detection of intermittently generated partial discharge.

According to the design, the partial discharge determination unit 130 may be implemented in an HMI (Human Machine Interface) to display the waveform of the electromagnetic wave signal, to output an alarm when a partial discharge occurs in the gas insulated switch, It is also possible to perform integrated control by receiving a signal.

The generation position calculation unit 140 may calculate the generation position of the electromagnetic wave sensed by the sensor unit 110 by using the electromagnetic wave sensing points of the sensor unit 110 that are electrically connected to the high frequency switch unit 120. The specific calculation process will be described later with reference to Fig.

According to the design, the partial discharge determination unit 130 and the generation position calculation unit 140 may be implemented in one module or may be divided into a plurality of modules.

FIG. 2 is a view illustrating a gas insulated switchgear partial discharge detection apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the high-frequency switch unit includes first to eighth high-frequency switches 121, 122, 123 and 124, which are implemented as transistors and each receive a control signal through one terminal and pass or cut an electromagnetic wave signal through other terminals, 125, 126, 127, 128).

2, the gas insulated switchgear partial discharge detection apparatus includes a surge protection unit 150, a low noise amplification unit 160, a filter unit 170, and an analog-to-digital conversion unit 180 ).

The surge protector 150 is electrically connected to the first to fourth electromagnetic wave sensors 111, 112, 113 and 114 to detect surges flowing from the first to fourth electromagnetic wave sensors 111, 112, 113 and 114, Can be removed. For example, the surge protector 150 may be implemented as a filter for filtering a signal of a surge frequency, and may be implemented as a circuit breaker or a fuse to protect a large surge from being introduced into the low noise amplifier 160 .

The low noise amplifier 160 may be electrically connected to the surge protector 150 to amplify the electromagnetic wave signal. For example, the low-noise amplifier 160 may include a plurality of transistors including a common gate amplifier stage or a common source amplifier stage.

The filter unit 170 is electrically connected between the first to eighth high frequency switches 121, 122, 123, 124, 125, 126, 127, and 128 and the partial discharge determination unit 130, Operation can be performed. For example, the filter unit 170 may be implemented as a band-pass filter having a wide band, an active filter including an operational amplifier, or a passive filter implemented as a passive device.

The analog-to-digital conversion unit 180 is electrically connected to the filter unit 170 and the first to eighth high frequency switches 121, 122, 123, 124, 125, 126, 127, Can be converted. For example, the analog-to-digital converter 180 may have a sampling frequency higher than the frequency of the first to fourth electromagnetic wave sensors 111, 112, 113 and 114 in the detectable frequency range. Here, the sampling frequency may be 1 GS / s, but is not limited thereto. In addition, the analog-to-digital converter 180 may have a feedback circuit for offset cancellation.

Referring to FIG. 2, the partial discharge determination unit and the generation position calculation unit shown in FIG. 1 may be implemented by an FPGA 191, a phase synchronization unit 192, an embedded board 193, and a computer 194. For example, the partial discharge determination unit and the generation position calculation unit may have independent spaces in the FPGA 191, the phase synchronization unit 192, the embedded board 193, and the computer 194, respectively. For example, the partial discharge determination unit may be implemented by an embedded board 193 and a computer 194, and the generation position calculation unit may be implemented by an FPGA 191 and a phase synchronization unit 192.

The FPGA 191 can process the digital signal at a high speed. For example, the FPGA 191 can extract only partial discharge pulse data from an electromagnetic wave signal by a multi-Trigger algorithm method.

The phase synchronization unit 192 may synchronize the electromagnetic wave signals transmitted from the first to fourth electromagnetic wave sensors 111, 112, 113, and 114 with one period of 16.66 ms.

The embedded board 193 may process the extracted pulse's data and deliver it to the computer 194.

The computer 194 may perform an analysis operation and a storage operation on the received data.

3 is a diagram showing the arrangement of the electromagnetic wave sensor.

Referring to FIG. 3, the gas insulated switchgear may include a first circuit breaker CB1, a second circuit breaker CB2, and a third circuit breaker CB3 for performing opening and closing operations. The first electromagnetic wave sensor 111 may be disposed on one side of the first circuit breaker CB1 and the second electromagnetic wave sensor 112 may be disposed between the first circuit breaker CB1 and the second circuit breaker CB2 And the third electromagnetic wave sensor 113 may be disposed between the second breaker CB2 and the third breaker CB3 and the fourth electromagnetic wave sensor 114 may be disposed between the third breaker CB3 and the third breaker CB3, As shown in FIG.

Accordingly, the partial discharge detecting device for a gas insulated switchgear according to an embodiment of the present invention can determine which of the first to third circuit breakers CB1, CB2, CB3 has generated a partial discharge.

4 is a view showing the position of a partial discharge sensed by an electromagnetic wave sensor.

4, a separation distance between the first electromagnetic sensor (Sensor1) and the second electromagnetic wave sensor (Sensor2) is D1, a separation distance between the second electromagnetic wave sensor (Sensor2) and the third electromagnetic wave sensor (Sensor3) is D2, The distance between the electromagnetic wave sensor (Sensor3) and the fourth electromagnetic wave sensor (Sensor4) is D3, and the distance between the occurrence position of the partial discharge and the second electromagnetic wave sensor (Sensor2) is d. Two of the first to fourth electromagnetic wave sensors may be bundled into a first to a third combination.

The partial discharge detecting apparatus for a gas insulated switchgear according to an embodiment of the present invention can calculate the occurrence position of a partial discharge by applying an attenuation coefficient α and a time difference value Δt to Equation 1 below. Here, C is the speed of light.

If the partial discharge fault is between the second electromagnetic sensor (Sensor2) and the third electromagnetic wave sensor (Sensor3), the gas insulated switchgear partial discharge detector applies D2 to D in Equation (1) The equation including d and alpha can be calculated by applying the difference between the sensing point of the second electromagnetic wave sensor Sensor2 and the sensing point of the third electromagnetic wave sensor Sensor3.

Also, the gas insulated switchgear partial discharge detecting apparatus may divide C at D1 and divide the difference between the sensing point of the first electromagnetic wave sensor (Sensor1) and the sensing point of the second electromagnetic wave sensor (Sensor2) to calculate a1.

Further, the gas insulated switchgear partial discharge detecting device may divide C at D3 and divide the difference between the sensing point of the third electromagnetic wave sensor (Sensor3) and the sensing point of the fourth electromagnetic wave sensor (Sensor4) to produce alpha 2.

Thereafter, the gas insulated switchgear partial discharge detecting apparatus can calculate d by applying a value belonging to the range of alpha 1 to alpha 2 to alpha in equation (1).

Accordingly, the gas insulated switchgear partial discharge detection device can accurately estimate the partial discharge generation position by reflecting the attenuation of the electromagnetic wave generated in accordance with the partial discharge.

5 is a diagram showing waveforms outputted by the partial discharge judgment unit.

5, a waveform Ch1 transmitted from the first electromagnetic wave sensor, a waveform Ch2 transmitted from the second electromagnetic wave sensor, a waveform Ch3 transmitted from the third electromagnetic wave sensor, and a waveform Ch3 transmitted from the fourth electromagnetic wave sensor, (Ch4) can be outputted on one screen, respectively. That is, the partial discharge determination unit can use the multiple trigger function.

If a pattern corresponding to the partial discharge appears in one of the waveforms Ch1 to Ch4, the partial discharge determination unit can extract and store only the pulse data of the box corresponding area in the entire data, store the pulse, and delete the remaining data. The partial discharge determination unit can perform the storage and pattern analysis on the waveforms in depth using the extracted pulses.

6 is a diagram illustrating the output of the generation position calculation unit.

Referring to FIG. 6, the generation position calculation unit calculates a generation position of the first and second electromagnetic wave sensors S1 and S2 based on a first map reflecting the positions of the first and second electromagnetic wave sensors S1 and S2 and a second map reflecting the positions of the second and third electromagnetic wave sensors S2 and S3. And a third map reflecting the positions of the third and fourth electromagnetic wave sensors S3 and S4.

Here, each position of the first map may correspond to the position of the section A in the gas insulated switchgear, and each position of the second map may correspond to the position of the section B in the gas insulated switchgear, May correspond to the position of the section C in the gas insulated switchgear.

When the electromagnetic wave sensor senses the first electromagnetic wave and the electromagnetic wave sensor senses the second electromagnetic wave as one of the first and second electromagnetic wave sensors S1 and S2, The second predetermined position in the second map, and the fourth predetermined position in the third map. For example, the second predetermined position may be adjacent to the left edge of the second map, and the fourth predetermined position may be adjacent to the left edge of the third map.

In the case where the electromagnetic wave sensor that senses the first electromagnetic wave and the electromagnetic wave sensor that senses the second electromagnetic wave are one of the second and third electromagnetic wave sensors S2 and S3 respectively, The display value of the predetermined position and the position corresponding to the d in the second map and the fourth predetermined position in the third map can be changed. For example, the first predetermined position may be adjacent to the right edge of the first map.

When the electromagnetic wave sensor senses an electromagnetic wave first and the electromagnetic wave sensor that senses an electromagnetic wave secondly is one of the third and fourth electromagnetic wave sensors S3 and S4, The display value of the predetermined position, the third predetermined position in the second map, and the position corresponding to the d in the third map can be changed. For example, the third predetermined position may be adjacent to the right edge of the second map.

The occurrence position calculator may display the first to third maps so that the gas insulated switchgear manager can intuitively grasp the generation position of the partial discharge.

7 is a flowchart illustrating a method of detecting a partial discharge of a gas insulated switch according to an embodiment of the present invention.

Referring to FIG. 7, a method for detecting a partial discharge of a gas insulated switchgear according to an embodiment of the present invention includes: setting (S10) an operation mode to one of a first mode and a second mode; (S20) of receiving an electromagnetic wave signal from a plurality of electromagnetic wave sensors disposed in the first mode, and analyzing a pattern of the electromagnetic wave signal when the set operation mode is the first mode to determine whether a partial discharge of the gas- (S40), and calculating a position where the electromagnetic wave is generated in the gas insulated switch by using the electromagnetic wave signal sensing points of the plurality of electromagnetic sensors when the set operation mode is the second mode have.

Here, the gas insulated switchgear partial discharge detection device may generate a switching signal when it is determined that a partial discharge has occurred in the gas insulated switchgear in the determining step S30, and when the switching signal is generated, The operation mode can be changed in step S10.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Anyone can make various variations.

110:
111-114: Electromagnetic wave sensor
120: high frequency switch section
121-128: High frequency switch
130: partial discharge judgment unit
140: Generated position calculation unit
150: Surge protection unit
160: Low-noise amplifier section
170:
180: analog-to-digital conversion section
191: FPGA
192: phase synchronization unit
193: Embedded board
194: Computer
CB1-CB3: Circuit breaker

Claims (11)

A sensor unit including a plurality of electromagnetic wave sensors disposed at different positions of the gas insulated switchgear to sense electromagnetic waves;
A high frequency switch unit for controlling the movement path of the electromagnetic wave signal transmitted from the sensor unit through a switching operation;
A partial discharge determination unit for receiving an electromagnetic wave signal from the high frequency switch unit and analyzing a pattern of the electromagnetic wave signal to determine whether a partial discharge of the gas insulated switchgear is generated; And
A generation position calculator that receives an electromagnetic wave signal from the high frequency switch unit and calculates a generation position of the electromagnetic wave sensed by the sensor unit using the electromagnetic wave sensing points of the sensor unit; Wherein the gas detector comprises a gas detector.
The method according to claim 1,
Wherein the high frequency switch unit performs a switching operation to change the movement path when the partial discharge determination unit determines that a partial discharge has occurred in the gas insulated switchgear.
The method according to claim 1,
Wherein the number of the plurality of electromagnetic wave sensors is at least three,
The occurrence position calculator calculates the occurrence position by using the following equation:

And calculates a generation position of the electromagnetic wave sensed by the sensor unit by applying the attenuation coefficient? And the time difference value? T,
Calculating a damping coefficient? Using the difference between the sensing time points of the electromagnetic wave sensors included in the first combination of the plurality of electromagnetic wave sensors and the sensing time difference value of the electromagnetic wave sensors included in the second combination,
The difference value of the sensed time of the electromagnetic wave sensors included in the third combination is applied to the [Delta] t,
Wherein d is a distance between one of the plurality of electromagnetic wave sensors and a generation position of the electromagnetic wave, D is a distance between one of the plurality of electromagnetic wave sensors and another, and C is a light speed.
The method according to claim 1,
Wherein the gas insulated switch comprises first, second and third circuit breakers,
The sensor unit includes a first electromagnetic wave sensor disposed at one side of the first breaker, a second electromagnetic wave sensor disposed between the first breaker and the second breaker, and a second electromagnetic wave sensor disposed between the second breaker and the third breaker A third electromagnetic wave sensor, and a fourth electromagnetic wave sensor disposed on one side of the third circuit breaker.
5. The method of claim 4,
The occurrence position calculator calculates the occurrence position by using the following equation:

And calculates a generation position of the electromagnetic wave sensed by the sensor unit by applying the attenuation coefficient? And the time difference value? T,
The difference between the sensed time points of the first electromagnetic wave sensor and the second electromagnetic wave sensor, which is the earliest of the first, second, third, and fourth electromagnetic wave sensors, is applied to the Δt, And the sensed time difference values of the electromagnetic wave sensor involved in the [Delta] t are used to calculate the attenuation coefficient [alpha]
Here, d is a distance between one of the first to fourth electromagnetic wave sensors and a generation position of the electromagnetic wave, D is a distance between one of the first to fourth electromagnetic wave sensors and the other, and C is a light- Partial discharge detection device.
6. The apparatus according to claim 5,
A third map reflecting the positions of the first and second electromagnetic wave sensors, a second map reflecting the positions of the second and third electromagnetic wave sensors, and a third map reflecting the positions of the third and fourth electromagnetic wave sensors ,
When the first electromagnetic wave sensor and the second electromagnetic wave sensor are one of the first electromagnetic wave sensor and the second electromagnetic wave sensor, respectively, the position corresponding to the d in the first map and the position corresponding to the d in the second map, 2 < / RTI > and a display value at a fourth predetermined position in the third map,
When the first electromagnetic wave sensor senses an electromagnetic wave and the second electromagnetic wave sensor senses an electromagnetic wave sensor as one of the second and third electromagnetic wave sensors, the first predetermined position in the first map and the d And changes the display value of the fourth predetermined position in the third map,
When an electromagnetic wave sensor that senses an electromagnetic wave firstly and an electromagnetic wave sensor that senses an electromagnetic wave that is secondarily one of the third and fourth electromagnetic wave sensors respectively receive a first predetermined position in the first map and a third predetermined position in the second map, And changes a display value at a predetermined position and a position corresponding to the d in the third map.
The method according to claim 1,
A surge protector electrically connected between the sensor unit and the high frequency switch unit to remove a surge introduced from the sensor unit;
A low noise amplifying unit electrically connected between the surge protection unit and the high frequency switch unit to amplify the electromagnetic wave signal from which the surge is removed; And
A filter unit electrically connected between the high frequency switch unit and the partial discharge determination unit to perform a filtering operation on the electromagnetic wave signal amplified by the low noise amplifier unit; Further comprising: a gas insulated switchgear partial discharge detection device.
The method according to claim 1,
And an analog-to-digital converter electrically connected to the high-frequency switch unit and having a sampling frequency higher than a frequency of the frequency range of the sensible frequency of the sensor unit.
The method according to claim 1,
Wherein the partial discharge determination unit outputs waveforms of the electromagnetic wave signals transmitted from each of the plurality of electromagnetic wave sensors, and detects a gas that starts storing and analyzing the pattern for the waveforms when one peak value of the waveforms exceeds a reference value Insulation breaker partial discharge detector.
Setting an operation mode to one of a first mode and a second mode;
Receiving electromagnetic wave signals from a plurality of electromagnetic wave sensors disposed at different positions of the gas insulated switchgear;
Analyzing a pattern of the electromagnetic wave signal when the set operation mode is the first mode and determining whether a partial discharge of the gas insulated switch is generated; And
Calculating a position at which the electromagnetic wave is generated in the gas insulated switch using the electromagnetic wave signal sensing points of the plurality of electromagnetic sensors when the set operation mode is the second mode; Wherein the gas detection switch is configured to detect a partial discharge of the gas insulated switchgear.
11. The method of claim 10,
Wherein the step of determining comprises generating a switching signal when it is determined that a partial discharge has occurred in the gas insulated switch,
Wherein the setting step changes the operating mode when the switching signal is generated.

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