JP2863391B2 - Partial discharge detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partial discharge detecting device for detecting a partial discharge of a power device such as a GIS (Gas Insulated Switchgear) or GIB.

[0002]

2. Description of the Related Art The configuration of a conventional partial discharge detection device will be described with reference to FIG. FIG. 19 is a diagram showing a configuration of a conventional GIS partial discharge detecting device disclosed in Japanese Patent Application Laid-Open No. 62-245976.

In FIG. 19, a GIS tank (metal tube)
Insulating spacers 3a and 3b are provided between the flanges 2 of the first and second flanges. The conductor 4 penetrates through the GIS tank 1 and is insulated and supported by insulating spacers 3a and 3b. The insulating gas 5 is sealed in the GIS tank 1.

Further, the conventional partial discharge detection device includes detectors 6a and 6b for detecting and outputting a voltage between adjacent flanges 2 with insulating spacers 3a and 3b as boundaries, and detectors 6a and 6b.
b, a position locating device 8 for receiving each output signal outputted from the signal lines 7a and 7b via the signal lines 7a and 7b, and locating the partial discharge position based on a time difference until these signals are obtained. The detectors 6a and 6b are, for example, A / D converters, and convert the difference between the detection signals, which are analog signals, into a digital signal. The position locating device 8 is a computer having peripheral devices such as a memory.

[0005] Next, the operation of the conventional partial discharge detecting device configured as described above will be described. First, if a partial discharge occurs at the point A of the conductor 4, a voltage surge occurs between the jacket of the GIS tank 1 and the conductor 4 due to the partial discharge, and a surge current flows through the conductor 4. A current of the same magnitude as this surge current but in the opposite direction flows through the jacket of the tank 1.

The transmitted surge current is applied to the insulating spacer 3.
a, 3b and a potential difference is generated. The potential difference thus generated is detected and output by the detectors 6a and 6b. The output signals from these detectors 6a, 6b are:
The signals are received by the position locating device 8 via the signal lines 7a and 7b.

At this time, the propagation speed of the voltage surge is almost equal to the speed of light C, and the insulating spacers 3a and 3b
When the distance to the X ₁ and X _2, respectively, the propagation time in which the voltage surge is propagated from partial discharge point A to the insulating spacers 3a and 3b are respectively determined as X ₁ / C and X ₂ / C. Therefore, when the time difference until the signals from the detectors 6a and 6b received by the position locating device 8 are obtained is measured, the position of the partial discharge can be located by the above equation.

[0008]

In the conventional partial discharge detecting device, the detector reacts to external noise, electromagnetic waves leaking from a non-target flange, a bushing, and the like, and surges from a transformer or an overhead wire. As a result, there is a problem that accurate detection of partial discharge and, consequently, a position at which discharge occurs cannot be located.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to provide a partial discharge detection device capable of accurately detecting a partial discharge and locating the generation position. .

[0010]

A partial discharge detection device according to a first aspect of the present invention includes the following means. [1] First and second detectors which are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and which detect a potential difference of a voltage surge of a partial discharge by a detection unit made of a thin stainless steel plate. [2] A position locating device for locating the partial discharge based on a time difference until signals from the first and second detectors are obtained.

A partial discharge detecting device according to a second aspect of the present invention includes the following means, wherein the flange of the GIS tank is shielded by a shielding material. [1] First and second detectors that are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detect a potential difference of a voltage surge of a partial discharge. [2] A position locating device for locating the partial discharge based on a time difference until signals from the first and second detectors are obtained.

A partial discharge detecting apparatus according to a third aspect of the present invention includes the following means, and the detector is disposed at the terminal end of each GIS section. [1] First and second detectors that are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detect a potential difference of a voltage surge of a partial discharge. [2] A position locating device for locating the partial discharge based on a time difference until signals from the first and second detectors are obtained.

A partial discharge detecting apparatus according to a fourth aspect of the present invention includes the following means, and the detectors are arranged at both ends of each GIS section. [1] First and second detectors that are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detect a potential difference of a voltage surge of a partial discharge. [2] A position locating device for locating the partial discharge based on a time difference until signals from the first and second detectors are obtained.

A partial discharge detecting device according to a fifth aspect of the present invention includes the following means, and the first and second detectors are respectively disposed on opposite sides of the adjacent GIS. [1] First and second detectors that are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detect a potential difference of a voltage surge of a partial discharge. [2] A position locating device for locating the partial discharge based on a time difference until signals from the first and second detectors are obtained.

A partial discharge detecting device according to a sixth aspect of the present invention includes the following means, and the detector is arranged at the center of a plurality of GISs adjacent to each other. [1] First and second detectors that are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detect a potential difference of a voltage surge of a partial discharge. [2] A position locating device for locating the partial discharge based on a time difference until signals from the first and second detectors are obtained.

A partial discharge detecting device according to a seventh aspect of the present invention includes the following means, and one detector is disposed at each of the GIS branch portions. [1] First and second detectors that are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detect a potential difference of a voltage surge of a partial discharge. [2] Position locating means for locating the position of the partial discharge based on the time difference until the signals from the first and second detectors are obtained.

The partial discharge detecting device according to claim 8 of the present invention includes the following means, and two detectors are arranged in one direction with the GIS branch portion as a center. [1] First and second detectors that are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detect a potential difference of a voltage surge of a partial discharge. [2] Position locating means for locating the position of the partial discharge based on the time difference until the signals from the first and second detectors are obtained.

[0018]

In the partial discharge detecting device according to the first aspect of the present invention, the first and second detectors are fixed between the flanges of the GIS tank with the insulating spacer interposed therebetween and are made of a stainless steel thin plate. Thereby, the potential difference of the voltage surge of the partial discharge is detected. Then, the position of the partial discharge is located by the position locating device based on the time difference until the signals from the first and second detectors are obtained.

In the partial discharge detecting device according to a second aspect of the present invention, the first and second detectors are fixed between the flanges of the GIS tank with the insulating spacer interposed therebetween.
The potential difference of the voltage surge of the partial discharge is detected. And
The position of the partial discharge is determined by the position locating device based on the time difference until the signals from the first and second detectors are obtained. Note that the flange portion of the GIS tank is shielded by a shield material.

In the partial discharge detecting device according to a third aspect of the present invention, the first and second detectors are fixed between the flanges of the GIS tank with the insulating spacer interposed therebetween.
The potential difference of the voltage surge of the partial discharge is detected. And
The position of the partial discharge is determined by the position locating device based on the time difference until the signals from the first and second detectors are obtained. The detector is arranged at the end of each GIS section.

In the partial discharge detection device according to a fourth aspect of the present invention, the first and second detectors are fixed between the flanges of the GIS tank with the insulating spacer interposed therebetween.
The potential difference of the voltage surge of the partial discharge is detected. And
The position of the partial discharge is determined by the position locating device based on the time difference until the signals from the first and second detectors are obtained. The detectors are arranged at both ends of each GIS section.

In the partial discharge detecting device according to the fifth aspect of the present invention, the first and second detectors fixed between the flanges of the GIS tank with the insulating spacer interposed therebetween are used.
The potential difference of the voltage surge of the partial discharge is detected. And
The position of the partial discharge is determined by the position locating device based on the time difference until the signals from the first and second detectors are obtained. Note that the first and second detectors are respectively disposed on opposite sides of the adjacent GIS.

In the partial discharge detecting device according to claim 6 of the present invention, the first and second detectors fixed between the flanges of the GIS tank with the insulating spacer interposed therebetween are used.
The potential difference of the voltage surge of the partial discharge is detected. And
The position of the partial discharge is determined by the position locating device based on the time difference until the signals from the first and second detectors are obtained. It should be noted that the detector has a plurality of adjacent G's.
Located in the center of the IS.

In the partial discharge detection device according to claim 7 of the present invention, the first and second detectors fixed between the flanges of the GIS tank with the insulating spacer interposed therebetween are used.
The potential difference of the voltage surge of the partial discharge is detected. And
The position of the partial discharge is determined by the position locating device based on the time difference until the signals from the first and second detectors are obtained. In addition, the said detector is allotted one each centering on the branch part of GIS.

In the partial discharge detecting device according to claim 8 of the present invention, the first and second detectors fixed between the flanges of the GIS tank with the insulating spacer interposed therebetween are used.
The potential difference of the voltage surge of the partial discharge is detected. And
The position of the partial discharge is determined by the position locating device based on the time difference until the signals from the first and second detectors are obtained. The two detectors are arranged in one direction around the GIS branch.

[0026]

【Example】

Embodiment 1 FIG. Hereinafter, a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing Embodiment 1 of the present invention.

Referring to FIG. 1, the first embodiment includes detectors 9a, 9b, 9c, and 9d having the following features, and the other configuration is the same as that of the conventional apparatus.

When a partial discharge occurs in the GIS tank 1, the left and right flanges 2 sandwiching the insulating spacers 3a and 3b.
A potential difference occurs between them. To detect this potential difference, the electrode type stainless across the flange 2 as shown in FIG. 1
The detection portions 9a and 9b and 9c and 9d of the thin thin plate are fixed with bolts. The GIS tank 1 made of aluminum can be formed by using stainless steel for the material of the detection units 9a to 9d.
Can be prevented, and the strength can be ensured.
The detection parts 9a to 9d are sufficiently practical because copper and aluminum are lower in terms of impedance, but the detection target is a high frequency. Since the location of the partial discharge is the same as that of the conventional device, the description is omitted. The same applies to the following embodiments.

Embodiment 2 FIG. Second Embodiment A second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a diagram showing a second embodiment of the present invention.

In FIG. 2, a shield material 10 is provided above the flange 2 and the insulating spacer 3. In other words, the GIS flange portion where no detecting portion is provided is shielded by providing the shielding material 10 over the entire circumference.

When a partial discharge occurs inside the GIS tank 1, electromagnetic waves leak from discontinuous portions of the GIS tank 1, such as the insulating spacer 3. In the case of a detection unit that captures or captures this electromagnetic wave, the signal is detected at an incorrect timing, which hinders the location of the partial discharge. Therefore, the insulating spacer 3 is made of a conductive shielding material 10 in contact with the flanges 2 on both sides.
Can prevent this problem. That is, between the insulating spacers 3a and 3b shown in FIG.
Also, there are multiple insulating spacers that are not
Therefore, these insulating spacers are covered with a conductive shielding material 10.
cover.

Embodiment 3 FIG. Third Embodiment A third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a diagram showing a third embodiment of the present invention.

In FIG. 3, a shield material 10A is provided above the flange 2 and the insulating spacer 3 and only the front face of the detection unit 9 is cut. That is, the GIS flange portion provided with either the contact type or the non-contact type detection unit 9 is shielded by the shield material 10A except for the front surface of the detection unit 9.

As in the second embodiment, leakage electromagnetic waves can be reduced as much as possible, and when the detection unit 9 is an antenna described later, the directivity can be supplemented.

Embodiment 4 FIG. Embodiment 4 Embodiment 4 of the present invention will be described with reference to FIG. FIG. 4 is a diagram showing a fourth embodiment of the present invention.

In FIG. 4, the detecting unit 9 is a shield material 10
Are interpolated in That is, the detection unit 9 is set to GI
It is inserted between the S flange portion and the shield material 10. As in the third embodiment, leakage electromagnetic waves can be eliminated, and intrusion of noise from outside can be prevented.

[0037]

Embodiment 6 FIG. A sixth embodiment of the present invention will be described with reference to FIGS. FIG. 5 and FIG.
FIG. 13 is a diagram illustrating a detection unit according to a sixth embodiment of the present invention.

In FIG. 5, a loop antenna 9A is used as a detection unit, and this loop antenna 9A is a quadrilateral having a side of λ / 4 (λ indicates a wavelength).

In FIG. 6, a bar antenna 9B is used as a detecting unit.
λ / 2 . Loop antenna 9A, bar antenna 9B
Is placed several cm from the GIS flange. Other configurations of the partial discharge detection device are the same as those of the first embodiment, but the detectors 6a and 6b convert high-frequency components into digital signals.

Of the electromagnetic waves generated when a partial discharge occurs, attention is paid particularly to the high-frequency component thereof, and a loop antenna 9A or a bar antenna 9B is used as a detection unit. In addition, the frequency sensitivity is adjusted so that the gain is highest for 10 MHz to 1 GHz.

Embodiment 7 FIG. A seventh embodiment of the present invention will be described with reference to FIG. FIG. 7 is a view showing a seventh embodiment of the present invention.

In FIG. 7, a horn antenna 9C having directivity is used as a detecting unit with the horn antenna 9C facing the flange 2, and the partial discharge detecting device is the same as that of the first embodiment. The detectors 6a and 6b convert high-frequency components into digital signals.

In the seventh embodiment, since the horn antenna 9C is used as a detection unit having higher directivity than the loop antenna 9A and the bar antenna 9B, the influence of the leakage electromagnetic wave from the other flange 2 can be cut.

Embodiment 8 FIG. Embodiment 8 Embodiment 8 of the present invention will be described with reference to FIG. FIG. 8 is a diagram showing Embodiment 8 of the present invention.

In FIG. 8, the flange portions 2 of the GIS tanks 1a and 1b in which the detecting portions 9D and 9E are arranged in parallel.
A and 2B are arranged on opposite sides. That is,
Detectors 9D and 9E are connected to adjacent GIS tanks 1a and 1b.
Are provided on the opposite sides. Therefore, the effect of the electromagnetic wave leaking therefrom can be minimized by moving the detection units 9D and 9E away from other adjacent flange portions.

Embodiment 9 FIG. Embodiment 9 Embodiment 9 of the present invention will be described with reference to FIG. FIG. 9 is a diagram showing a schematic cross section of Embodiment 9 of the present invention.

In FIG. 9, three GIS tanks 1a,
A detection unit 9F is provided at the center of 1b and 1c.
The detecting unit 9F is arranged as close as possible and equidistant from each of the GIS tanks 1a to 1c. In other words, the number of detection units can be reduced by sharing a phase-separated GIS or an adjacent GIS with one detection unit 9F.

Embodiment 10 FIG. Embodiment 10 Embodiment 10 of the present invention will be described with reference to FIG. FIG. 10 is a diagram showing a tenth embodiment of the present invention.

In FIG. 10, a CT 11 mounted on the GIS tank 1 and an amplifier 12 for amplifying and shaping the signal of the detection unit 9 are provided.

Normally, the signal detected by the detector 9 is very small. Therefore, particularly when performing position location based on a time difference, since the waveform itself is not so important, the data is acquired after transmitting the detection signal to a long distance by amplifying and shaping it into a pulse waveform in the vicinity of the detection unit 9. be able to.

Embodiment 11 FIG. An eleventh embodiment of the present invention will be described with reference to FIG. In FIG. 10, the power supply of the amplifier 12 is supplied by the CT 11 attached to the GIS tank 1, so that the power supply from other sources becomes unnecessary.

Embodiment 12 FIG. A twelfth embodiment of the present invention will be described with reference to FIG. FIG. 11 shows a twelfth embodiment of the present invention.

In FIG. 11, the CT 11 is the same as the eleventh embodiment, and includes a differential amplifier 13 connected to the detection unit 9 and an LED 14 connected to the differential amplifier 13. Detector (data acquisition device)
6 receives a signal through the optical fiber 15.

After amplifying and shaping the signal from the detecting unit 9 in the differential amplifier 13, the signal is insulated by the LED 14 and transmitted to the detector 6, thereby ensuring safety against surge from GIS and ensuring the safety of the detector 6. It is possible to eliminate an earth loop when a plurality of channels are input.

Embodiment 13 FIG. A thirteenth embodiment of the present invention will be described with reference to FIG. In FIG. 11, L
The power supply up to the ED 14 is supplied from the CT 11 attached to the GIS tank 1 so that the insulation including the power supply system is provided.

Embodiment 14 FIG. Embodiment 14 Embodiment 14 of the present invention will be described with reference to FIG. FIG. 12 shows a fourteenth embodiment of the present invention.

In FIG. 12, a detector (data acquisition device) 6 is connected to a detector 9 via a loop cut capacitor 16.
Connected to.

In particular, when the detection unit 9 is of a contact type with the GIS tank 1, a plurality of channels are supplied to the detector (data acquisition device) 6.
Inputting the signal of (1), an earth loop including the GIS tank 1 is generated, and is easily affected by external induced noise. Therefore, the capacitor 16 for loop cut
Is inserted.

The configurations of the partial discharge detection system of the second to fourteenth embodiments are the same as those of the first embodiment. Example 1 in which the system configuration is described below
5 may be the same.

Embodiment 15 FIG. A fifteenth embodiment of the present invention will be described with reference to FIG. FIG. 13 shows a fifteenth embodiment of the present invention.

In FIG. 13, the operation divisions of the GIS tanks are 1a, 1b, 1c and 1d, and each of the GIS tanks 1
a, 1b, 1c and 1d are connected and separated by three-phase conductors 17, 18, 19 and 20. The detection units 9w, 9x, 9y, and 9z are provided on a flange portion closest to the center of each operation section.

The fifteenth embodiment further includes a data acquisition device 21 for receiving a voltage signal between the flanges sandwiching the insulating spacers 3a and 3b, detected by the detection units 9w and 9x, and collecting the voltage signal as a potential difference signal; A data acquisition device 22 for receiving a voltage signal between the flanges sandwiching the insulating spacers 3c and 3d detected by 9y and 9z and collecting the voltage signal as a potential difference signal, and detection units 9w, 9x, 9y and 9
z, a signal that causes the data acquisition devices 21 and 22 to stop the acquisition when any one of the received signals exceeds a trigger level preset by a position locating device described later. After receiving the output of the stop signal from the triggering unit 23, receiving the potential difference data collected from the data collection devices 21 and 22, respectively, and transmitting each of the transmitted potential difference data. A position locating device 8A for locating the partial discharge position based on the time difference of the potential difference data.

Although it is very important to determine the location of the partial discharge in detail, in actual GIS operation,
First, the operation to be performed is to stop (disconnect) the operation category including the abnormality. Therefore, when performing position locating at least in operation division units, the detection units 9w, 9
Since x, 9y and 9z are arranged at the center thereof, the influence of apparent attenuation due to branching or the like can be minimized.

Embodiment 16 FIG. Embodiment 16 Embodiment 16 of the present invention will be described with reference to FIG. FIG. 14 is a diagram showing a sixteenth embodiment of the present invention.

In FIG. 14, the GIS tanks 1a, 1
b, 1c and 1d, detectors 9w, 9x, 9y and 9z,
The three-phase conductors 17, 18, 19 and 20 are all the same as those of the fifteenth embodiment.
However, the detectors 9w, 9x, 9y, and 9z are provided on the flange portion of each operation section that is closest to the outermost end. Unlike Embodiment 15, since the distance between the detection units is long, there is a possibility that the sensitivity may be deteriorated, but the detailed position localization becomes possible based on the difference in the propagation time.

Embodiment 17 FIG. Embodiment 17 Embodiment 17 of the present invention will be described with reference to FIG. FIG. 15 is a diagram showing a seventeenth embodiment of the present invention.

Referring to FIG. 15, the configuration of the sixteenth embodiment is different from the configuration of the sixteenth embodiment in that the detecting portions 9w2 and
9x2, 9y2, and 9z2 are added. Embodiment 15 and Embodiment 16 have the merits.

Embodiment 18 FIG. Embodiment 18 Embodiment 18 of the present invention will be described with reference to FIGS. FIG.
FIG. 26 is a diagram showing an embodiment 18 of the present invention. FIG.
8 is the triggering unit 2 according to the eighteenth embodiment of the present invention.
It is a block diagram which shows a part of 3A.

FIG. 16 shows a GIS tank 1a and a GIS tank 1b branched and connected to the transformer 24. The detectors 9w and 9x are provided in the GIS tank 1a,
Each one is provided around the branch point 1b.

Based on the difference between the surge propagation times to the detectors 9w and 9x, it is possible to determine whether the partial discharge occurrence point is one of the GIS tanks 1a and 1b. When occurrence on the GIS tank 1b side is determined, it is determined that it is caused by the transformer 24, and the GI
The abnormality diagnosis of S is not performed. When the bushing is used instead of the transformer 24, the abnormality diagnosis is not performed similarly because the overhead wire is propagated from the air.

Embodiment 19 FIG. A nineteenth embodiment of the present invention will be described with reference to FIGS. FIG.
FIG. 24 is a diagram showing a nineteenth embodiment of the present invention.

In FIG. 17, the detectors 9w and 9x are G
It is provided on the IS tank 1b side. Detectors 9w and 9
The point of occurrence of partial discharge is GIS
It is determined which of the tanks 1a and 1b and the transformer 24 is classified. The transformer 24 does not perform GIS abnormality diagnosis. When the bushing is used instead of the transformer 24, the abnormality diagnosis is not performed similarly because the overhead wire is propagated from the air.

In FIG. 18, the triggering unit 2
The 3A comparators 25 and 26 compare the signals from the detectors 9x and 9w in FIGS. 16 and 17 with the set comparison signal level, and output a pulse signal when the input signal is larger than the comparison signal. The one-shot circuit 27
In response to the pulse signal from the comparator 25, the pulse width is shaped so that the signal generated by one partial discharge is reduced.
For example, the D-type flip-flop 28 is
6 and receives and latches the pulse signal. Data acquisition device 2
1 is activated by using the signal of the flip-flop 28 as a trigger, and captures the signal of the detection unit 9w.

In order to make the circuit shown in FIG. 18 as simple as possible, L1 = L2 in FIG. Here, in both FIG. 16 and FIG.
If it is input earlier than w, the GIS
Although it is determined that the intrusion has occurred from outside the tank 1a, in order to save time and effort, data is not taken in that case.

First, when the detection section 9w detects a signal before the detection section 9x, the comparator 26 turns on, and the flip-flop 28 turns on. When this is input to the external trigger signal to the data acquisition device 21, data acquisition is performed. This trigger is, of course, a pre-trigger.

Next, when the detection section 9x detects the signal first, the comparator 25 is turned on, so that the one-shot circuit 27 outputs a pulse signal to the flip-flop 28 for a certain period of time. By treating this signal as a reset signal, the signal of the detection unit 9w input later than the detection unit 9x is masked, and no trigger signal is output.

The system configurations of the partial discharge detection devices of the sixteenth to nineteenth embodiments are the same as those of the fifteenth embodiment.

[0079]

As described above, the partial discharge detection device according to claim 1 of the present invention has a G
First and second detectors that are fixed between flanges of the IS tank and that detect a potential difference of a voltage surge of a partial discharge by a detection unit formed of a thin stainless steel plate, and a detector from the first and second detectors. Since the position locating device for locating the position of the partial discharge based on the time difference until the signal is obtained is provided, it is possible to detect with higher sensitivity than ever before, and it is possible to improve the location locating accuracy.

As described above, the partial discharge detecting device according to claim 2 of the present invention has a GI with an insulating spacer interposed.
First and second detectors fixed between the flanges of the S tank and detecting the potential difference of the voltage surge of the partial discharge, and a time difference until signals from the first and second detectors are obtained. Since a position locating device for locating the partial discharge is provided and the flange portion of the GIS tank is shielded with a shielding material, it is possible to detect with higher sensitivity than ever before, and it is possible to improve the position locating accuracy.

As described above, the partial discharge detecting device according to claim 3 of the present invention has a GI with an insulating spacer interposed.
First and second detectors fixed between the flanges of the S tank and detecting the potential difference of the voltage surge of the partial discharge, and a time difference until signals from the first and second detectors are obtained. Since a position locating device for locating the partial discharge is provided, and the detector is arranged at the terminal end of each GIS section, it is possible to detect with higher sensitivity than before and to improve the position locating accuracy. To play.

As described above, the partial discharge detecting device according to the fourth aspect of the present invention has a GI with an insulating spacer interposed.
First and second detectors fixed between the flanges of the S tank and detecting the potential difference of the voltage surge of the partial discharge, and a time difference until signals from the first and second detectors are obtained. A position locating device for locating the position of the partial discharge, and the detectors are arranged at both ends of each GIS section, so that the detection can be performed with higher sensitivity than before and the location accuracy of the generated position can be improved. To play.

As described above, the partial discharge detection device according to the fifth aspect of the present invention has a GI with an insulating spacer interposed.
First and second detectors fixed between the flanges of the S tank and detecting the potential difference of the voltage surge of the partial discharge, and a time difference until signals from the first and second detectors are obtained. A position locating device for locating the position of the partial discharge, wherein the first and second detectors are arranged on the opposite sides of the adjacent GIS, respectively, so that they can be detected with higher sensitivity than before, and the generation position locating accuracy is also higher. The effect that it can improve is produced.

As described above, the partial discharge detection device according to claim 6 of the present invention provides a GI with an insulating spacer interposed.
First and second detectors fixed between the flanges of the S tank and detecting the potential difference of the voltage surge of the partial discharge, and a time difference until signals from the first and second detectors are obtained. A position locating device for locating the position of the partial discharge, and since the detector is arranged at the center of a plurality of adjacent GISs, the detector can be detected with higher sensitivity than before, and the location of the generated position can be improved in accuracy. It works.

As described above, the partial discharge detecting device according to claim 7 of the present invention provides a GI with an insulating spacer interposed therebetween.
First and second detectors fixed between the flanges of the S tank and detecting the potential difference of the voltage surge of the partial discharge, and a time difference until signals from the first and second detectors are obtained. Position locating means for locating the partial discharge, and one of the detectors is arranged at each of the GIS branching points, so that the detector can be detected with higher sensitivity than before and the generation position locating accuracy can be improved. This has the effect that it can be performed.

As described above, the partial discharge detection device according to claim 8 of the present invention provides a GI with an insulating spacer interposed.
First and second detectors fixed between the flanges of the S tank and detecting the potential difference of the voltage surge of the partial discharge, and a time difference until signals from the first and second detectors are obtained. Position locating means for locating the partial discharge, and two of the detectors are arranged in one direction around the branch of the GIS.
There is an effect that the generation position locating accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a fourth embodiment of the present invention.

FIG. 5 is a diagram showing a fifth embodiment of the present invention.

FIG. 6 is a diagram showing a sixth embodiment of the present invention.

FIG. 7 is a diagram showing a seventh embodiment of the present invention.

FIG. 8 is a diagram showing an eighth embodiment of the present invention.

FIG. 9 is a diagram showing a ninth embodiment of the present invention.

FIG. 10 is a diagram showing Embodiments 10 and 11 of the present invention.

FIG. 11 is a diagram showing Embodiment 12 and Embodiment 13 of the present invention.

FIG. 12 is a diagram showing a fourteenth embodiment of the present invention;

FIG. 13 is a diagram showing a fifteenth embodiment of the present invention;

FIG. 14 is a diagram showing a sixteenth embodiment of the present invention;

FIG. 15 is a diagram showing a seventeenth embodiment of the present invention.

FIG. 16 is a diagram showing an embodiment 18 of the present invention;

FIG. 17 is a diagram showing a nineteenth embodiment of the present invention;

FIG. 18 is a diagram showing a triggering unit according to Embodiments 18 and 19 of the present invention.

FIG. 19 is a diagram showing a conventional partial discharge detection device.

[Explanation of symbols]

 1, 1a, 1b, 1c, 1d GIS tank 2 Flange 3, 3a, 3b Insulating spacer 6a, 6b Detector 8, 8A Position locating device 9a, 9b, 9c, 9d Detector 10, 10A Shielding material 11 CT 12 Amplifier 16 Capacitors 17, 18, 19, 20 Three-phase conductor 21, 22 Data acquisition device 23, 23A Triggering unit 24 Transformer 25, 26 Comparator 27 One-shot circuit 28 Flip-flop

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01R 31/12 G01R 31/08

Claims (8)

(57) [Claims] 1. A first and a second detector which are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and which detect a potential difference of a voltage surge of a partial discharge by a detecting section made of a stainless steel thin plate, and A partial discharge detecting device comprising a position locating device for locating a partial discharge position based on a time difference until signals from the first and second detectors are obtained. 2. A first and a second detector, which are fixed between flanges of a GIS tank with an insulating spacer interposed therebetween, and detect a potential difference of a voltage surge of a partial discharge, and a signal from the first and the second detectors. A position locating device for locating a partial discharge based on a time difference until a signal is obtained;
A partial discharge detection device, wherein a flange portion of an S tank is shielded by a shield material. 3. A first and a second detector fixed between flanges of a GIS tank with an insulating spacer interposed therebetween, the first and second detectors detecting a potential difference of a voltage surge of a partial discharge, and a signal from the first and the second detectors. A partial discharge detecting device, comprising: a position locating device for locating the position of a partial discharge based on a time difference until a signal is obtained, wherein the detector is arranged at a terminal portion of each GIS section. 4. A first and second detector which is fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detects a potential difference of a voltage surge of a partial discharge, and a detector from the first and second detectors. A partial discharge detecting device comprising a position locating device for locating a partial discharge based on a time difference until a signal is obtained, wherein the detectors are arranged at both ends of each GIS section. 5. A first and second detector which is fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detects a potential difference of a voltage surge of a partial discharge, and a signal from the first and second detectors. A position locating device for locating the partial discharge based on a time difference until a signal is obtained, wherein the first and second detectors are respectively disposed on opposite sides of the adjacent GIS. Partial discharge detection device. 6. A first and a second detector fixed between flanges of a GIS tank with an insulating spacer interposed therebetween, for detecting a potential difference of a voltage surge of a partial discharge, and a detector for detecting a potential difference between the first and second detectors. A partial discharge detecting device, comprising: a position locating device for locating the position of a partial discharge based on a time difference until a signal is obtained, wherein the detector is arranged at the center of a plurality of adjacent GISs. 7. A first and a second detector fixed between flanges of a GIS tank with an insulating spacer interposed therebetween and detecting a potential difference of a voltage surge of a partial discharge, and a signal from the first and the second detectors. Partial discharge detection, comprising: position locating means for locating a partial discharge based on a time difference until a signal is obtained, wherein each of the detectors is arranged one by one around a GIS branch part. apparatus. 8. A first and a second detector fixed between flanges of a GIS tank with an insulating spacer interposed between the first and second detectors for detecting a potential difference of a voltage surge of a partial discharge, and a signal from the first and the second detectors. A position locating means for locating a partial discharge based on a time difference until a signal is obtained, wherein two detectors are arranged in one direction centering on a branch of the GIS. Discharge detection device.