JP2001245411A - Device for trouble judgment for gas insulation electric equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability of trouble judgment at the occurrence of a ground fault that has not been exactly judged hitherto. SOLUTION: A device for trouble judgment for a gas insulation electric equipment, having a cylindrical metal vessel 1, a electrically charging conductor 2 housed in the metal vessel wherein an insulating gas is filled, and a plurality of spacers 3a to 3c that partition the inner part of the metal vessel as a gas compartment insulatingly holding the electrically charging conductor from the metal vessel, comprises a high-speed phenomenon sensor 14 that detects a high-speed phenomenon that occurs together with such a trouble as the ground fault or a short circuit in the gas compartment, a circuit 13 for trouble judgment that judges the occurrence of a trouble judging from the output of the high-speed phenomenon sensor, a low-speed phenomenon sensor 15 that detects a low-speed phenomenon that occurs together with such a trouble as the ground fault or the short circuit in the gas compartment, a circuit 24 for trouble judgment that judges the occurrence of a trouble judging from the output of the low- speed phenomenon sensor, and a computer control unit that specifies the gas compartment of the metal vessel where the trouble occurs judging from the outputs of the two circuits for trouble judgment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects a change in gas pressure of a gas section constituting a gas-insulated electric apparatus and determines whether or not a ground fault or a short circuit has occurred in a power-carrying conductor inside the gas section. The present invention relates to a failure determination device for gas-insulated electrical equipment.

[0002]

2. Description of the Related Art There are two types of gas-insulated electrical equipment: one in which a conductor for one phase is placed in a cylindrical metal container, and the other in which a conductor for three phases is placed. There is a ground fault to the metal container of the power-carrying conductor, and in the latter, there is a ground fault to the metal container of the power-carrying conductor of each phase and a short circuit between the power-carrying conductors of the different phases. Are the same, and the former case will be described for convenience.

A conventional apparatus for determining a failure of a gas-insulated electric device will be described with reference to the drawings. FIG. 11 is a diagram illustrating a configuration of a conventional failure determination device for a gas-insulated electric device.

In FIG. 11, reference numeral 1 denotes a cylindrical metal container filled with an insulating gas, 2 denotes a power conductor accommodated in the metal container 1, 3a, 3b and 3c partition the metal container 1 into gas compartments and apply power. It is an insulating spacer for insulatingly supporting the conductor 2.

In FIG. 1, reference numeral 11 denotes a gas pressure detector for detecting a gas pressure signal corresponding to a gas pressure of a gas section, which is attached to the metal container 1 and collectively managed by a communication pipe.
Reference numeral 2 denotes a sampling circuit that samples a gas pressure signal output from the gas pressure detector 11 after a predetermined time in response to an input of a ground fault current detection signal from outside, and 13 compares the gas pressure signal sampled by the sampling circuit 12 with a threshold value. This is a failure determination circuit that determines that a ground fault has occurred if the sampled gas pressure is higher.

Next, the operation of the above-described conventional apparatus for determining a failure of a gas-insulated electric device will be described with reference to the drawings. FIG. 12 is a waveform diagram showing a gas pressure signal detected by a gas pressure detector of a conventional failure determination device for gas-insulated electrical equipment.

[0007] A gas section in which a metal section of the metal container 1 is partitioned by insulating spacers 3a and 3b is collectively managed by a communication pipe.
When a ground fault occurs between the power-supplying conductor 2 and the metal container 1, the pressure of the insulating gas rapidly increases near the arc in the gas compartment, and a pressure wave is generated. The gas dynamic pressure signal corresponding to the dynamic pressure of the insulating gas due to this pressure wave is a gas pressure signal superimposed on the gas static pressure signal corresponding to the static pressure of the insulating gas filled in the adjacent gas compartment connected by the communication pipe. The pressure is detected by the pressure detector 11.

[0008] Since the gas pressure signal and the ground fault current detection signal are input from the outside to the sampling circuit 12 a predetermined time after the occurrence of the ground fault, a predetermined time t from the input time T1 of the ground fault current detection signal. The gas pressure signal P2 at the time T2 after elapse is sampled (see FIG. 12).

The failure determination circuit 13 determines that a ground fault has occurred if the sampled gas pressure signal P2 is larger (in FIG. 12, the gas pressure signal P2 is larger).

Although not shown in FIG. 11, a gas pressure detector 11 is attached to the metal container 1 for other gas sections and connected to a sampling circuit and a failure determination circuit to determine the presence or absence of a ground fault. It has become.

[0011]

In the conventional apparatus for determining a failure of gas-insulated electrical equipment as described above, the gas pressure signal detected by the gas pressure detector 11 is assumed to have a shape substantially as shown in FIG. The gas pressure signal P2 at a time point T2 after a predetermined time t has elapsed from the input time point T1 of the current detection signal is sampled, and compared with a predetermined threshold value Pt, it is determined that a ground fault has occurred if the gas pressure signal P2 is larger. However, the gas pressure rise may be different from that in FIG. 12 depending on the size of the metal container 1 between the insulating spacers 3a and 3b, the arc energy at the time of the ground fault, the duration of the ground fault, and the like. Since it cannot be set uniquely, there is a problem that the presence or absence of occurrence of a ground fault cannot be accurately determined.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and depends on structural constraints such as the spacing of insulating spacers and conditions at the time of a ground fault such as arc energy and duration of a ground fault. A failure determination device for gas-insulated electrical equipment that can improve the accuracy of determination by combining different types of sensors to accurately determine the ground fault gas classification without being The purpose is to gain.

[0013]

According to a first aspect of the present invention, there is provided a failure determining apparatus for a gas-insulated electric device, comprising: a cylindrical metal container; and a section accommodated in the metal container filled with an insulating gas. A failure determination device for a gas-insulated electrical device for determining a failure of a gas-insulated electrical device having an electrical conductor and a plurality of insulating spacers that insulate the power application conductor from the metal container and partition the interior of the metal container as a gas section A ground fault in the gas section, a high-speed phenomenon sensor for detecting a high-speed phenomenon due to a short-circuit failure, a first failure determination circuit for determining the presence or absence of a failure from an output of the high-speed phenomenon sensor, A low-speed phenomenon sensor for detecting a low-speed phenomenon caused by a ground fault or short-circuit failure in the gas section; a second failure determination circuit for determining the presence or absence of a failure from an output of the low-speed phenomenon sensor; It is obtained by an arithmetic control circuit for identifying the generated gas section of said metal container failure from the output of the second failure determining circuit.

According to a second aspect of the present invention, there is provided a failure judging device for a gas-insulated electrical device, comprising: a cylindrical metal container; a power conductor accommodated in the metal container filled with an insulating gas; In a failure determination apparatus for a gas-insulated electrical device, the device includes a plurality of insulating spacers that insulate and support a conductor from the metal container and partition the inside of the metal container as a gas partition. A gas pressure detector for detecting a change in gas pressure, a first sampling circuit for extracting a change in gas pressure from the gas pressure detector based on a fault current detection signal, and a gas sampled by the first sampling circuit. Gas pressure change is the first
A first failure determination circuit that determines an accident-occurring gas category if the threshold value is exceeded, a cracked gas detector that ionizes and detects cracked gas in the gas section, and a cracked gas concentration that is extracted from the cracked gas detector. A second sampling circuit; a second failure determination circuit that determines an accident-occurring gas classification when the concentration of the decomposed gas taken out by the second sampling circuit exceeds a second threshold; and the first and second failures When a decomposition gas exceeding the second threshold is generated in a gas section in which a pressure rise exceeding the first threshold has occurred based on a judgment output of the judgment circuit, the gas division of the metal container is And an arithmetic control circuit for determining that a failure has occurred.

According to a third aspect of the present invention, there is provided a failure determining apparatus for a gas-insulated electric device, comprising: a cylindrical metal container; a power conductor contained in the metal container filled with an insulating gas; In a failure determination apparatus for a gas-insulated electrical device, the device includes a plurality of insulating spacers that insulate and support a conductor from the metal container and partition the inside of the metal container as a gas partition. An impact gas pressure detector that detects an impact gas pressure, a relay circuit that captures an operation signal of the impact gas pressure detector, a cracked gas detector that ionizes and detects cracked gas in the gas section, and the cracked gas detection A sampling circuit for extracting the concentration of the cracked gas from the vessel, and determining that the accident gas is classified if the concentration of the cracked gas extracted by the sampling circuit exceeds a predetermined threshold. A failure determination circuit based on the output of the relay circuit and the failure determination circuit, when a decomposition gas exceeding the predetermined threshold is generated in the gas section where the impact gas pressure detector has operated, A calculation control circuit for determining that a failure has occurred in the gas section of the metal container.

According to a fourth aspect of the present invention, there is provided a failure determining apparatus for a gas-insulated electric device, comprising: a cylindrical metal container; a power conductor accommodated in the metal container filled with an insulating gas; In a failure determination apparatus for a gas-insulated electrical device, the device includes a plurality of insulating spacers that insulate and support an electrical conductor from the metal container and partition the inside of the metal container as a gas partition. An optical sensor that detects arc light leaking when a failure occurs, a relay circuit that captures an operation signal of the optical sensor, a cracked gas detector that ionizes and detects cracked gas in the gas section, and a cracked gas detector A sampling circuit for extracting the cracked gas concentration; and determining that the accident occurred gas classification when the cracked gas concentration extracted by the sampling circuit exceeds a predetermined threshold. A failure determination circuit, based on outputs of the relay circuit and the failure determination circuit, when a decomposition gas exceeding the predetermined threshold is generated in the gas section where the optical sensor has operated, the decomposition of the metal container is performed. And an arithmetic control circuit for determining that a failure has occurred in the gas section.

According to a fifth aspect of the present invention, there is provided a failure judging device for a gas-insulated electric device according to the second aspect of the present invention, which detects an arc light leaking when a fault occurs in the gas section. An optical sensor, and a relay circuit that captures an operation signal of the optical sensor, wherein the arithmetic and control circuit has exceeded the second threshold in the gas section in which the pressure rise that exceeds the first threshold has occurred. When a decomposed gas is generated and the gas section and the gas section operated by the optical sensor match, it is determined that a failure has occurred in the gas section of the metal container.

According to a sixth aspect of the present invention, in the failure judging device for a gas-insulated electric device, the operation control circuit is arranged such that the gas pressure detector locates. The second sampling circuit is controlled so as to obtain the output of the decomposed gas detector only for the gas section based on the gas section information.

According to a seventh aspect of the present invention, in the failure judging device for a gas-insulated electric device, the operation control circuit may be arranged such that the shock gas pressure detector is located. The sampling circuit is controlled so as to obtain the output of the decomposed gas detector only for the gas section based on the obtained gas section information.

According to an eighth aspect of the present invention, there is provided the failure determining apparatus for a gas-insulated electrical device according to the fourth aspect, wherein the arithmetic and control circuit comprises: The sampling circuit is controlled so as to obtain the output of the decomposed gas detector only for the gas section based on the information.

According to a ninth aspect of the present invention, in the failure judging device for a gas insulated electric device, the arithmetic and control circuit includes the gas pressure detector and the optical device. The second sampling circuit is controlled so as to obtain the output of the decomposed gas detector only for the gas segment based on the gas segment information specified by the sensor.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 A failure determination device for a gas-insulated electrical device according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a failure determination device for a gas-insulated electric device according to Embodiment 1 of the present invention. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 1, reference numeral 1 denotes a metal container of a gas-insulated electric device, 2 denotes a power conductor, 3a to 3c denote insulating spacers supporting the power conductor 2, and 14 denotes a high-speed phenomenon caused by a ground fault, for example, a gas pressure. A high-speed phenomenon sensor for detecting, 15 is a low-speed phenomenon due to ground fault, for example, a low-speed phenomenon sensor for detecting decomposition gas, 13 is a failure determination circuit, 24 is a failure determination circuit, and 25 is two types of sensors. Is an arithmetic control circuit that determines the presence or absence of a ground fault using the determination result using

Next, the operation of the failure judging device for a gas-insulated electric device according to the first embodiment will be described with reference to the drawings. FIG. 2 is a diagram conceptually showing a time change of an output signal after occurrence of a ground fault of the sensor for high-speed phenomena and the sensor for low-speed phenomena of the failure judging device of the gas-insulated electric device according to Embodiment 1 of the present invention. is there.

When the power supply conductor 2 is grounded to the metal container 1 in a gas section in which the metal container 1 is partitioned by insulating spacers 3a and 3b, various phenomena occur at different response speeds. In that case, a high-speed phenomenon, for example, a gas pressure is detected by the high-speed phenomenon sensor 14, and the failure determination circuit 13 determines a failure.

Similarly, a low-speed phenomenon, for example, a decomposition gas is detected by using the low-speed phenomenon sensor
And finally, the arithmetic and control circuit 25 determines the presence or absence of a ground fault based on the results of both determinations.

That is, the operation control circuit 25 is configured as shown in FIG.
As shown in (a), after the gas pressure detected by the high-speed phenomenon sensor 14 has been determined to be a failure due to the rise of the gas pressure of about several hundred ms by the failure determination circuit 13, after a certain period of time has passed ( For example, when the breakdown gas detected by the low-speed phenomenon sensor 15 exceeds a predetermined concentration by the failure determination circuit 24, it is determined that a ground fault has occurred, for example, several s).

As described above, there is an effect that reliability can be improved by making a determination using two types of sensors.

Although a case has been described where two sensors, one for high-speed phenomena and the other for low-speed phenomena, are used as sensors, the same effect can be obtained by using three or more sensors.

Embodiment 2 FIG. Second Embodiment A failure determination device for a gas-insulated electric device according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 shows Embodiment 2 of the present invention.
It is a figure showing composition of a failure judging device of gas insulated electric equipment concerning.

In FIG. 3, reference numeral 1 denotes a metal container of a gas-insulated electric device, 2 denotes a power conductor, 3a to 3c denote insulating spacers for supporting the power conductor 2, 4 denotes a gas pipe communicating the gas compartments,
1 is a gas pressure detector, 12 is a sampling circuit for sampling the output signal of the gas pressure detector 11, 13 is a failure determination circuit, 21a to 21c are decomposition gas detectors installed for each gas section, and 22 is a decomposition gas detector. A starting circuit, 23 is a sampling circuit for sampling the output signals of the cracked gas detectors 21a to 21c, 24 is a failure determination circuit for determining the presence or absence of an abnormality based on the cracked gas concentration, and 25 is a gas pressure detector 11 and a cracked gas detector 21a. This is an arithmetic control circuit for determining the presence / absence of a ground fault based on the information of .about.21c.

Next, the operation of the failure judging device for gas-insulated electric equipment according to the second embodiment will be described with reference to the drawings.

When the power supply conductor 2 is grounded to the metal container 1 in the gas section in which the metal container 1 is separated by the insulating spacers 3a and 3b, the ground fault current detection signal operates without time delay. Subsequently, in the tank, the pressure of the insulating gas rapidly rises in the vicinity of the arc and becomes a pressure wave, which flows into the static pressure side. Further, the insulating gas undergoes chemical decomposition due to the high heat generated by the arc energy, thereby generating F ions. A cracked gas is generated at the center.

The arithmetic and control circuit 25 recognizes the occurrence of a failure based on the ground fault current detection signal, and instructs the failure determination circuit 13 to discard sampling data for n seconds. Further, the cracked gas detector activation circuit 22 is activated, and the cracked gas detector 21a is activated.
To 21c to start power supply.

The signal detected by the gas pressure detector 11 is averaged by a sampling circuit 12, and then sent to a failure determination circuit 13, where the pressure exceeds a threshold value for each gas section managed by the gas pressure detector 11. Determine whether there is a difference. When a gas section exceeding the threshold value is detected, it is output to the arithmetic and control circuit 25 as an accident occurring gas section.

The signals detected by the decomposed gas detectors 21a to 21c are averaged by a sampling circuit 23, sent to a failure determination circuit 24, and the decomposed gas concentration is compared with a threshold value for each gas classification. When a gas section exceeding the threshold value is detected, it is output to the arithmetic and control circuit 25 as an accident occurring gas section.

In the arithmetic and control circuit 25, the decomposition gas detector 2
The gas compartment designated by 1a to 21c is the gas pressure detector 11
By judging whether or not the gas is within the specified gas classification, if it is the same, it is judged that a ground fault has occurred, so that the accuracy of the failure judgment of the gas insulated electrical equipment can be improved and the time to confirm the failure site can be shortened There is an effect that can be.

That is, in the first embodiment, the power-carrying conductor 2 is placed inside the cylindrical metal container 1 and both ends of the metal container 1 are partitioned by the insulating spacers 3a to 3c.
Is a gas-insulated electrical device that is insulated from a metal container with insulating spacers and connects the gas container filled with insulating gas to the metal container to form a gas division. A detector 11 is mounted, and a decomposition gas detector 21a for ionizing and detecting a decomposition gas in each gas compartment.
21c, a ground fault current detection signal is taken in, a sampling circuit 12 for taking out a change in gas pressure from a gas pressure detector 11, a failure judgment circuit 13 for making a threshold value judgment on the pressure of the change, Decomposition gas detector activation circuit 22 for activating the power supply of the detector, and sampling circuit 23 for detecting gas concentration from the decomposition gas detector
And a failure determination circuit 24 for determining whether or not decomposition gas is generated
When a cracked gas exceeding the threshold is generated in the gas compartment in the gas segment where the pressure rise exceeding the threshold has occurred, a ground fault,
A failure determination device for a gas-insulated electrical device, comprising an arithmetic control circuit 25 that determines that a short circuit has occurred.

Embodiment 3 Third Embodiment A third embodiment of the present invention will be described with reference to the drawings. FIG. 4 shows Embodiment 3 of the present invention.
It is a figure showing composition of a failure judging device of gas insulated electric equipment concerning.

In FIG. 4, reference numeral 1 denotes a metal container of a gas-insulated electric device, 2 denotes an electric conductor, 3a to 3c denote insulating spacers for supporting the electric conductor 2, 4 denotes a gas pipe connecting the gas compartments,
6 is an impact gas pressure detector, 27 is an impact gas pressure detector 2
6, a relay circuit for taking in the output signal, 21a to 21c decomposed gas detectors installed for each gas section, 22 a decomposed gas detector activation circuit, and 23 a decomposed gas detector 21a to 21c
Sampling circuit for sampling the output signal of
Is a failure determination circuit for determining the presence or absence of an abnormality based on the decomposition gas concentration, and 25 is an impact gas pressure detector 26 and a decomposition gas detector 2
This is an arithmetic control circuit that determines the presence or absence of a ground fault based on the information of 1a to 21c.

Next, the operation of the failure judging device for a gas-insulated electric device according to the third embodiment will be described with reference to the drawings.

When the power supply conductor 2 is grounded to the metal container 1 in a gas compartment in which the metal container 1 is partitioned by insulating spacers 3a and 3b, a sharp pressure rise wave is generated in the tank near the arc due to arc energy in the vicinity of the arc. The insulating gas undergoes chemical decomposition due to the high heat generated by the arc energy, generating a decomposition gas centered on F ions.

The arithmetic control circuit 25 recognizes the occurrence of a failure from the operation signal of the shock gas pressure detector 26 for detecting a rapid pressure rise. Subsequently, the decomposition gas detector activation circuit 22 is activated to supply power to the decomposition gas detectors 21a to 21c.

The operation information of the shock gas pressure detector 26 is used to operate the relay corresponding to the gas classification of the relay circuit 27,
This is output to the arithmetic and control circuit 25 as the accident occurrence gas classification.

The signals detected by the decomposition gas detectors 21a to 21c are averaged by a sampling circuit 23, sent to a failure judgment circuit 24, and the decomposition gas concentration is compared with a threshold value for each gas section. When a gas section exceeding the threshold value is detected, it is output to the arithmetic and control circuit 25 as an accident-occurring gas section.

In the arithmetic and control circuit 25, the decomposition gas detector 2
It is determined whether or not the gas section identified by 1a to 21c is within the gas section identified by the impact gas pressure detector 26, and if they are the same, it is determined that a ground fault has occurred. There is an effect that the device can be supplied.

That is, in the third embodiment, the power-supplying conductor 2 is placed inside the cylindrical metal container 1 and both ends of the metal container 1 are separated by the insulating spacers 3a to 3c, and the power-supplying conductor is made of metal by the insulating spacer. Gas insulated electrical equipment that is insulated from the container and is connected to a gas container filled with insulating gas in a metal container to form a gas segment. Each gas segment has an impact gas pressure detector that operates according to the change in impact gas pressure. 26, mounted on each gas compartment are decomposed gas detectors 21a to 21c for ionizing and detecting gas, and a relay circuit 27 for capturing an operation signal of the impact gas pressure detector and a power supply for the decomposed gas detector. Activated decomposition gas detector activation circuit 2
2, a sampling circuit 23 for detecting a gas concentration from the cracked gas detector, a failure determination circuit 24 for determining whether or not cracked gas is generated, and a threshold value for a gas section in the gas section in which the shock gas pressure detector operates. A failure determination device for a gas-insulated electrical device, comprising: a calculation control circuit 25 that determines that a ground fault or short circuit has occurred when a decomposition gas exceeding the above is generated.

Embodiment 4 Fourth Embodiment A failure determination device for a gas-insulated electric device according to a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 5 shows Embodiment 4 of the present invention.
It is a figure showing composition of a failure judging device of gas insulated electric equipment concerning.

In FIG. 5, reference numeral 1 denotes a metal container of a gas-insulated electric device, 2 denotes an electric conductor, 3a to 3c denote insulating spacers for supporting the electric conductor 2, 4 denotes a gas pipe communicating the gas compartments,
1a to 31b are optical sensors, 32 is optical sensors 31a to 31
b, a relay circuit for capturing the operation signal, 21a to 21c decomposed gas detectors installed for each gas compartment, 22 a decomposed gas detector activation circuit, and 23 a decomposed gas detector 21a to 21c
Sampling circuit for sampling the output signal of
Is a failure determination circuit for determining the presence or absence of an abnormality based on the decomposition gas concentration, and 25 is an optical sensor 31a to 31b and the decomposition gas detector 2
This is an arithmetic control circuit that makes a determination based on the information of 1a to 21c.

Next, the operation of the failure judging device for a gas-insulated electric device according to the fourth embodiment will be described with reference to the drawings.

When the power supply conductor 2 is grounded to the metal container 1 in a gas compartment in which the metal container 1 is partitioned by insulating spacers 3a and 3b, arc light is generated inside the tank, and the insulating spacer 3
a to 3b leak outside. Furthermore, the insulating gas undergoes chemical decomposition due to the high heat generated by the arc energy, and
Decomposition gas mainly composed of ions is generated.

The arithmetic and control circuit 25 takes in the operation signals of the optical sensors 31a to 31b for detecting the arc light and recognizes the occurrence of a failure. Subsequently, the decomposition gas detector activation circuit 22 is activated to supply power to the decomposition gas detectors 21a to 21c.

The operation information of the optical sensors 31a to 31b operates the relay corresponding to the gas division in the relay circuit 32 and outputs the information to the arithmetic and control circuit 25 as the accident occurrence gas division.

The signals detected by the decomposition gas detectors 21a to 21c are averaged by a sampling circuit 23, sent to a failure determination circuit 24, and the decomposition gas concentration is compared with a threshold value for each gas section. When a gas section exceeding the threshold is detected, it is output to the arithmetic and control circuit 25 as an accident-occurring gas section.

In the arithmetic and control circuit 25, the decomposition gas detector 2
The gas compartments designated by 1a to 21c are optical sensors 31a to 3c.
It is determined whether or not the gas is within the standardized gas classification of 1b, and if it is within the standardized gas classification, it is determined that a ground fault has occurred.
This has the effect of improving the accuracy of failure determination.

That is, in the fourth embodiment, the power-carrying conductor 2 is placed inside the cylindrical metal container 1 and both ends of the metal container are separated by the insulating spacers 3a to 3c, and the power-carrying conductor is separated by the insulating spacer. A gas-insulated electrical device that supports and insulates a gas container filled with insulating gas from a metal container and separates the two ends of the metal container from each other. Attach optical sensors 31a and 31b for detecting leaking arc light,
Each of the gas compartments is provided with a decomposition gas detector 21a to 21c for ionizing and detecting a gas, a relay circuit 32 for taking in an operation signal of the optical sensor, and a decomposition gas detector for activating a power supply of the decomposition gas detector. An activation circuit 22, a sampling circuit 23 for detecting a gas concentration from the cracked gas detector, and a failure determination circuit 2 for determining whether or not cracked gas is generated
And a calculation control circuit 25 for determining that a ground fault or short circuit has occurred when a decomposition gas exceeding a threshold is generated in a gas section in the gas section where the optical sensor has operated. This is a failure determination device for a gas-insulated electrical device.

Embodiment 5 Embodiment 5 A failure determining apparatus for a gas-insulated electric device according to Embodiment 5 of the present invention will be described with reference to the drawings. FIG. 6 shows Embodiment 5 of the present invention.
It is a figure showing composition of a failure judging device of gas insulated electric equipment concerning.

In FIG. 6, reference numeral 1 denotes a metal container of a gas-insulated electric device, 2 denotes an electric conductor, 3a to 3c denote insulating spacers for supporting the electric conductor 2, 4 denotes a gas pipe connecting the gas compartments,
1 is a gas pressure detector, 12 is a sampling circuit that samples an output signal of the gas pressure detector 11, 13 is a failure determination circuit, 31a to 31b are optical sensors, and 32 is a relay circuit that captures operation signals of the optical sensors 31a to 31b. , 21
a to 21c decomposed gas detectors installed for each gas compartment;
2 is a decomposition gas detector activation circuit, 23 is a decomposition gas detector 2
A sampling circuit for sampling the output signals of 1a to 21c, a failure determination circuit for determining the presence or absence of an abnormality based on the concentration of the decomposition gas, a gas pressure detector 11, optical sensors 31a to 31b, and a decomposition gas detector 21a to 21c. This is an arithmetic control circuit that makes a determination based on the information of 21c.

Next, the operation of the failure judging device for a gas-insulated electric device according to the fifth embodiment will be described with reference to the drawings.

When the power supply conductor 2 is grounded to the metal container 1 in a gas compartment in which the metal container 1 is partitioned by insulating spacers 3a and 3b, arc light is generated inside the tank, and the insulating spacer 3
a to 3c leak outside. Further, the pressure of the insulating gas rapidly rises near the arc and becomes a pressure wave, which flows into the static pressure side. Further, the insulating gas undergoes chemical decomposition due to the high heat generated by the arc energy, and a decomposition gas centering on F ions is generated.

The arithmetic and control circuit 25 recognizes the occurrence of a failure from the operation signal information of the optical sensors 31a to 31b for detecting the arc light. That is, the operation information of the optical sensors 31a to 31b operates the relay corresponding to the gas classification in the relay circuit 32 and outputs the information to the arithmetic and control circuit 25 as the accident occurrence gas classification. Then, the failure determination circuit 13 of the gas pressure detector 11 is instructed to compare the pressure before the occurrence of the failure with the pressure n seconds after the occurrence of the failure, and activates the decomposition gas detector activation circuit 22 to activate the decomposition gas detector. The power is supplied to the detectors 21a to 21c.

The signal detected by the gas pressure detector 11 is averaged by a sampling circuit 12, and then sent to a failure determination circuit 13 to determine the presence or absence of a pressure difference exceeding a threshold for each gas section. When a gas section exceeding the threshold value is detected, it is output to the arithmetic and control circuit 25 as an accident occurring gas section.

The signals detected by the decomposition gas detectors 21a to 21c are averaged by a sampling circuit 23, sent to a failure judgment circuit 24, and the decomposition gas concentration is compared with a threshold value for each gas section. When a gas section exceeding the threshold value is detected, it is output to the arithmetic and control circuit 25 as an accident-occurring gas section.

In the arithmetic control circuit 25, the optical sensors 31a to 31a
31b and the gas division specified by the gas pressure detector 11 are the same, and the decomposition gas detectors 21a to 21c also generate decomposition gas having a concentration exceeding the threshold value in the gas division within the gas division specified by the two types of sensors. When it is determined that the ground fault has occurred, it is determined that a ground fault has occurred, thereby improving the accuracy of the failure determination of the electric device.

That is, in the fifth embodiment, the power supply conductor 2 is placed inside the cylindrical metal container 1 and both ends of the metal container are partitioned by the insulating spacers 3a to 3c, and the power supply conductor is separated by the insulating spacer. A gas-insulated electrical device that supports and insulates a gas container filled with insulating gas from a metal container and separates the two ends of the metal container from each other. Attach optical sensors 31a and 31b for detecting leaking arc light,
A gas pressure detector 11 for detecting a change in gas pressure is attached to each gas section, and a decomposition gas detector 21a to 21c for ionizing and detecting a gas is attached to each gas section. A relay circuit 32 for taking in a signal, a sampling circuit 12 for taking out a change in gas pressure from the gas pressure detector 11, a failure determination circuit 13 for determining a threshold value for the pressure of the change, and a power supply for the decomposition gas detector. A cracked gas detector activation circuit 22, a sampling circuit 23 for detecting gas concentration from the cracked gas detector, a failure determination circuit 24 for determining whether or not cracked gas is generated,
When the gas section where the optical sensor operates and the gas section where the pressure rise exceeding the threshold has occurred match, and when the decomposition gas exceeding the threshold is generated in the gas section in the same gas section, ground fault, short circuit A failure determination device for a gas-insulated electrical device, comprising an arithmetic and control circuit 25 for determining that a failure has occurred.

Embodiment 6 FIG. Sixth Embodiment A failure determination device for a gas-insulated electrical device according to a sixth embodiment of the present invention will be described with reference to the drawings. FIG. 7 shows Embodiment 6 of the present invention.
It is a figure showing composition of a failure judging device of gas insulated electric equipment concerning.

Reference numeral 1 denotes a metal container of a gas insulated electric device, 2 denotes a power conductor, 3a to 3c denote insulating spacers supporting the power conductor 2, 4 denotes a gas pipe communicating gas sections, 11 denotes a gas pressure detector, and 12 denotes a gas pressure detector. Is a sampling circuit for sampling the output signal of the gas pressure detector 11, 13 is a failure determination circuit, 2
1a to 21c are decomposition gas detectors installed for each gas compartment,
22 is a decomposition gas detector activation circuit, 23 is a sampling circuit for sampling the output signals of the decomposition gas detectors 21a to 21c, 24 is a failure determination circuit that determines the presence or absence of an abnormality based on the decomposition gas concentration, and 25 is a gas pressure detector 11 And an arithmetic control circuit for determining the presence / absence of a ground fault based on the information of the cracked gas detectors 21a to 21c.

Next, the operation of the failure judging device for gas-insulated electrical equipment according to the sixth embodiment will be described with reference to the drawings.

When the power supply conductor 2 is grounded to the metal container 1 in a gas section where the metal container 1 is partitioned by the insulating spacers 3a and 3b, the fault current detection signal operates without time delay. Also,
Inside the tank, the pressure of the insulating gas rises sharply near the arc and generates a pressure wave, and the gas static pressure signal corresponding to the static pressure of the insulating gas that fills the gas section contains the dynamic pressure of the insulating gas due to this pressure wave. Gas dynamic pressure signal is generated for
The insulating gas undergoes chemical decomposition due to the high heat generated by the arc energy of the ground fault, and generates a decomposition gas mainly composed of F ions.

Starting from the fault current detection signal, the sampling circuit 12 of the gas pressure detector 11 and the cracked gas detector starting circuit 22, which is a power supply circuit for activating the cracked gas detectors 21a to 21c, are started.

The detection signal of the gas pressure detector 11 is averaged by the sampling circuit 12, and then sent to the failure determination circuit 13 to determine the presence or absence of a pressure difference exceeding a threshold for each gas section. When a gas section exceeding the threshold value is detected, it is output to the arithmetic and control circuit 25 as an accident occurring gas section.

In the arithmetic and control circuit 25, the gas pressure detector 1
A command is issued to the sampling circuit 23 so as to sample the decomposed gas data only for the gas section identified by 1.

The sampling circuit 23 collects only the output of the decomposed gas detector 21 in the designated gas section, compares the decomposed gas concentration with a threshold value in the failure determination circuit 24, and reports the result to the arithmetic and control circuit 25. .

In the arithmetic and control circuit 25, the gas pressure detector 1
1 and the specified decomposition gas detector 21
When it is determined that the concentration of the cracked gas is abnormal also in the information taken in, it is determined that a ground fault has occurred. As described above, by confirming the different phenomena caused by the ground fault with each of the detectors, there is an effect that the accuracy of the failure determination of the electric device is improved and the determination time of the occurrence of the failure is shortened.

That is, in the sixth embodiment, the power supply conductor 2 is placed inside the cylindrical metal container 1 and both ends of the metal container are partitioned by the insulating spacers 3a to 3c, and the power supply conductor is separated by the insulating spacer. A gas insulated electric device which is insulated from and supported by connecting a gas compartment filled with an insulating gas to a metal container to form a gas segment, and each gas segment is provided with a gas pressure detector 11 for detecting a change in gas pressure, Each gas section has a decomposition gas detector 21a-2 for ionizing and detecting the decomposition gas.
1c, a grounding current detection signal is taken in, a sampling circuit 12 for taking out a change in gas pressure from a gas pressure detector 11, a failure judging circuit 13 for judging a threshold value for the pressure of the change, and the decomposition gas detector A starting circuit 22 for starting the power supply of the above, a sampling circuit 23 for detecting a gas concentration from the cracked gas detector, a failure determination circuit 24 for determining whether or not a cracked gas is generated, and a pressure rise exceeding a threshold value. When a decomposition gas exceeding a threshold is generated in a gas section in the gas section where the gas generation has occurred, an arithmetic control circuit 25 for determining that a ground fault or a short circuit has occurred is provided, and the gas section specified by the gas pressure detector 11 is provided. A gas exhaust system having a function of controlling the sampling circuit 23 so as to obtain an output of a decomposition gas detector only for a gas section in the gas section based on the information. A failure determination device for electrical equipment.

Embodiment 7 Seventh Embodiment A failure determination device for a gas-insulated electrical device according to a seventh embodiment of the present invention will be described with reference to the drawings. FIG. 8 shows Embodiment 7 of the present invention.
It is a figure showing composition of a failure judging device of gas insulated electric equipment concerning.

In FIG. 8, reference numeral 1 denotes a metal container of a gas insulated electric device, 2 denotes an electric conductor, 3a to 3c denote insulating spacers for supporting the electric conductor 2, 4 denotes a gas pipe communicating gas sections,
6 is an impact gas pressure detector, 27 is an impact gas pressure detector 2
6, a relay circuit for taking in the output signal, 21a to 21c decomposed gas detectors installed for each gas section, 22 a decomposed gas detector activation circuit, and 23 a decomposed gas detector 21a to 21c
Sampling circuit for sampling the output signal of
Is a failure determination circuit for determining the presence or absence of an abnormality based on the decomposition gas concentration, and 25 is an impact gas pressure detector 26 and a decomposition gas detector 2
This is an arithmetic control circuit that determines the presence or absence of a ground fault based on the information of 1a to 21c.

Next, the operation of the failure judging device for gas-insulated electric equipment according to the seventh embodiment will be described with reference to the drawings.

When the power supply conductor 2 is grounded to the metal container 1 in a gas section in which the metal container 1 is separated by insulating spacers 3a and 3b, the pressure of the insulating gas rises rapidly near the arc, and a pressure wave is generated. The pressure wave is detected by the shock gas pressure detector 26, and the relay circuit 27 is driven by the operation signal. at the same time,
Activate the cracked gas detector activation circuit 22 to supply power to the cracked gas detectors 21a to 21c in all gas compartments.

The control arithmetic circuit 25 determines the accident-occurring gas classification based on the operation information of the shock gas pressure detector 26 taken in by the relay circuit 27.

The arithmetic control circuit 25 samples the decomposed gas data only for the gas section specified by the impact gas pressure detector 26.
Command. The sampling circuit 23 collects only the output of the decomposed gas detector 21 of the designated gas section, compares the decomposed gas concentration with a threshold by the failure determination circuit 24, and reports the result to the arithmetic and control circuit 25.

The arithmetic control circuit 25 determines that a ground fault has occurred when one of the designated decomposition gas detectors 21 generates a decomposition gas. As described above, by confirming the different phenomena caused by the internal accident of the GIS with the respective detectors, there is an effect that the accuracy of the failure determination of the electric device is improved and the determination time of the occurrence of the failure is shortened.

That is, in the seventh embodiment, the power supply conductor 2 is placed inside the cylindrical metal container 1 and both ends of the metal container are separated by the insulating spacers 3a to 3c, and the power supply conductor is separated by the insulating spacer. A gas insulated electrical device which is insulated from the gas container and is connected to a gas container filled with an insulating gas in a metal container to form a gas segment. Each gas segment has an impact gas pressure detector 26 which operates according to a change in impact gas pressure. And attach
Decomposed gas detectors 21a to 21c for ionizing and detecting gas are attached to each gas compartment, a relay circuit 27 for taking in an operation signal of the impact gas pressure detector, and a decomposed gas for starting a power supply of the decomposed gas detector. Detector activation circuit 22
A sampling circuit 23 for detecting a gas concentration from the cracked gas detector, a failure determination circuit 24 for determining whether or not cracked gas is generated, and a threshold value for a gas section in a gas section where the shock gas pressure detector has operated. When an excess cracked gas is generated, an arithmetic control circuit 25 for determining that a ground fault or short circuit has occurred is provided, and the gas in the gas section is determined based on the gas section information specified by the shock gas pressure detector 26. Sampling circuit 2 to obtain the output of the cracked gas detector only for the section
3 is a failure judging device for a gas-insulated electric device, the device having a function of controlling the control device 3.

Embodiment 8 FIG. Embodiment 8 A failure determination apparatus for a gas-insulated electric device according to Embodiment 8 of the present invention will be described with reference to the drawings. FIG. 9 shows Embodiment 8 of the present invention.
It is a figure showing composition of a failure judging device of gas insulated electric equipment concerning.

In FIG. 9, reference numeral 1 denotes a metal container of a gas-insulated electric device, 2 denotes a power conductor, 3a to 3c denote insulating spacers for supporting the power conductor 2, 4 denotes a gas pipe communicating gas sections, 3a to 3c.
1a to 31b are optical sensors, 32 is optical sensors 31a to 31
b, a relay circuit for capturing the operation signal, 21a to 21c decomposed gas detectors installed for each gas compartment, 22 a decomposed gas detector activation circuit, and 23 a decomposed gas detector 21a to 21c
Sampling circuit for sampling the output signal of
Is a failure determination circuit for determining the presence or absence of an abnormality based on the decomposition gas concentration, and 25 is an optical sensor 31a to 31b and the decomposition gas detector 2
This is an arithmetic control circuit that makes a determination based on the information of 1a to 21c.

Next, the operation of the failure judging device for gas-insulated electrical equipment according to the eighth embodiment will be described with reference to the drawings.

When the power supply conductor 2 is grounded to the metal container 1 in a gas section in which the metal container 1 is partitioned by insulating spacers 3a and 3b, the pressure of the insulating gas rises rapidly near the arc to generate a pressure wave and an arc. Energy emission occurs and leaks to the outside from the insulating spacers 3a to 3c. The leak light is captured by the optical sensors 31a to 31b, and the relay circuit 32 is driven by the operation signal. At the same time, the cracked gas detector activation circuit 22 is started, and the cracked gas detectors 21a to 21a to
Power is supplied to 21c.

The control arithmetic circuit 25 determines the accident-occurring gas section based on the operation information of the relay driven by the relay circuit 32, and instructs the sampling circuit 23 to sample the decomposition gas data only for the gas section. put out.

The sampling circuit 23 collects the output of the decomposed gas detector 21 in the designated gas section, compares the decomposed gas concentration with a threshold value in the failure determination circuit 24, and reports the result to the arithmetic and control circuit 25. .

The arithmetic control circuit 25 determines that a ground fault has occurred when one of the designated decomposition gas detectors 21 generates a decomposition gas. As described above, by confirming the different phenomena caused by the ground fault with each of the detectors, there is an effect that the accuracy of the failure determination of the electric device is improved and the determination time of the occurrence of the failure is shortened.

That is, in the eighth embodiment, the power conductor 2 is placed inside the cylindrical metal container 1 and both ends of the metal container are partitioned by the insulating spacers 3a to 3c, and the power conductor is separated by the insulating spacer. A gas-insulated electrical device that supports and insulates a gas container filled with insulating gas from a metal container and separates the two ends of the metal container from each other. Attach optical sensors 31a and 31b for detecting leaking arc light,
Each of the gas compartments is provided with a decomposition gas detector 21a to 21c for ionizing and detecting a gas, a relay circuit 32 for taking in an operation signal of the optical sensor, and a decomposition gas detector for activating a power supply of the decomposition gas detector. An activation circuit 22, a sampling circuit 23 for detecting a gas concentration from the cracked gas detector, and a failure determination circuit 2 for determining whether or not cracked gas is generated
And a calculation control circuit 25 that determines that a ground fault or short circuit has occurred when a decomposition gas exceeding a threshold is generated in a gas section in the gas section where the optical sensor has operated, wherein the optical sensor is Failure determination of a gas-insulated electrical device, having a function of controlling the sampling circuit 23 so as to obtain an output of the decomposed gas detector only for a gas section in the gas section based on the operated gas section information. Device.

Embodiment 9 FIG. Embodiment 9 A failure determination device for a gas-insulated electric device according to Embodiment 9 of the present invention will be described with reference to the drawings. FIG. 10 is a diagram showing a configuration of a failure determination device for a gas-insulated electric device according to Embodiment 9 of the present invention.

In FIG. 10, 1 is a metal container of the gas insulated electric equipment, 2 is a power conductor, 3a to 3c are insulating spacers for supporting the power conductor 2, 4 is a gas pipe communicating the gas sections,
11 is a gas pressure detector, 12 is a sampling circuit for sampling the output signal of the gas pressure detector 11, 13 is a failure determination circuit, 31a to 31b are optical sensors, and 32 is a relay circuit for capturing operation signals of the optical sensors 31a to 31b. , 2
1a to 21c are decomposition gas detectors installed for each gas compartment,
22 is a decomposition gas detector activation circuit, 23 is a sampling circuit for sampling the output signals of the decomposition gas detectors 21a to 21c, 24 is a failure determination circuit that determines the presence or absence of an abnormality based on the decomposition gas concentration, and 25 is a gas pressure detector 11 And an arithmetic control circuit for making a determination based on information from the optical sensors 31a to 31b and the decomposition gas detectors 21a to 21c.

Next, the operation of the failure judging device for gas-insulated electric equipment according to the ninth embodiment will be described with reference to the drawings.

When the power supply conductor 2 is grounded to the metal container 1 in a gas section in which the metal container 1 is separated by the insulating spacers 3a and 3b, an arc light is generated inside the tank and the insulating spacer 3
a to 3c leak outside. Further, the pressure of the insulating gas rapidly rises near the arc and becomes a pressure wave, which flows into the static pressure side. Further, the insulating gas undergoes chemical decomposition due to the high heat generated by the arc energy, and a decomposition gas centering on F ions is generated. The above-described leakage light is transmitted to the optical sensors 31a to 31a.
At 31b, the relay circuit 32 is driven by the operation signal.

At the same time, the cracked gas detector starting circuit 22 is started to supply power to the cracked gas detectors 21a to 21c in all the gas sections. Further, the occurrence of a ground fault is notified to the arithmetic and control circuit 25.

In the arithmetic and control circuit 25, the gas pressure detector 1
The first failure determination circuit 13 is instructed to compare the pressure before the occurrence of the failure with the pressure n seconds after the occurrence of the failure. After the signal detected by the gas pressure detector 11 is averaged by the sampling circuit 12, the signal is sent to the failure determination circuit 13, where the presence or absence of a pressure difference exceeding a threshold value is determined for each gas section. When a gas section exceeding the threshold value is detected, it is output to the arithmetic and control circuit 25 as an accident occurring gas section.

Further, the arithmetic and control circuit 25 issues a command to the sampling circuit 23 so as to sample the decomposed gas data only for the gas section specified by the gas pressure detector 11.

The sampling circuit 23 performs an averaging process only on the output of the decomposed gas detector 21 of the designated gas section, sends it to the failure determination circuit 24, compares the decomposed gas concentration with the threshold value, and determines whether the concentration exceeds the threshold value. The result is output to the arithmetic and control circuit 25.

In the arithmetic and control circuit 25, the photosensors 31a to 31b and the gas pressure detector 11 have the same specified gas division, and the decomposition gas detector 21 in the specified gas division also has a decomposition gas concentration exceeding the threshold. When gas is detected, it is determined that a ground fault has occurred. As described above, by detecting the different phenomena caused by the ground fault with the respective detectors, there is an effect that the accuracy of the failure determination of the electric device is improved and the determination time of the occurrence of the failure is shortened.

That is, in the ninth embodiment, a power supply conductor 2 is placed inside a cylindrical metal container 1 and both ends of the metal container are partitioned by insulating spacers 3a to 3c. A gas-insulated electrical device that supports and insulates a gas container filled with insulating gas from a metal container and separates the two ends of the metal container from each other. Attach optical sensors 31a and 31b for detecting leaking arc light,
A gas pressure detector 11 for detecting a change in gas pressure is attached to each gas section, and a decomposition gas detector 21a to 21c for ionizing and detecting a gas is attached to each gas section. A relay circuit 32 for taking in a signal, a sampling circuit 12 for taking out a change in gas pressure from the gas pressure detector 11, a failure judgment circuit 13 for determining a threshold value for the pressure of the change, and a power supply of the decomposition gas detector is started. And a sampling circuit 23 for detecting a gas concentration from the cracked gas detector.
Determination circuit 2 for determining the presence or absence of decomposition gas as a threshold
4, when the gas section where the optical sensor operates and the gas section where the pressure rise exceeding the threshold value coincides, and when the decomposition gas exceeding the threshold value is generated in the gas section within the same gas section, Arithmetic and control circuit 25 for determining that a short circuit or short circuit has occurred
When the gas segment in which the optical sensor operates and the gas segment in which the pressure rise exceeds the threshold value match, only the gas segment in the gas segment based on the gas segment information is used for the decomposition gas detector. Sampling circuit 23 to obtain output
The apparatus for determining a failure of a gas-insulated electrical device has a function of controlling a failure.

[0102]

As described above, the failure judging device for a gas-insulated electric device according to the first aspect of the present invention is housed in a cylindrical metal container and inside the metal container filled with insulating gas. Failure determination of a gas-insulated electrical device for determining a failure of a gas-insulated electrical device having a power application conductor and a plurality of insulating spacers that insulate and support the power application conductor from the metal container and partition the inside of the metal container as a gas section In the apparatus, a ground fault in the gas section, a high-speed phenomenon sensor for detecting a high-speed phenomenon due to a short-circuit failure, a first failure determination circuit for determining the presence or absence of a failure from the output of the high-speed phenomenon sensor, A ground fault in the gas section, a low-speed phenomenon sensor for detecting a low-speed phenomenon caused by a short-circuit failure, a second failure determination circuit for determining the presence or absence of a failure from an output of the low-speed phenomenon sensor, Because with a from the output of the first and second failure determining circuit and the arithmetic control circuit to identify the gas section of said metal container to occurrence of a failure, an effect that reliability can be improved failure determination.

As described above, the failure judgment apparatus for a gas-insulated electric device according to a second aspect of the present invention includes a cylindrical metal container and a power supply unit housed inside the metal container filled with insulating gas. In a failure determination apparatus for a gas-insulated electrical device, the conductor and a plurality of insulating spacers that insulate and support the power-carrying conductor from the metal container and partition the inside of the metal container as a gas section perform failure determination of the gas-insulated electrical device. A gas pressure detector for detecting a change in gas pressure of the gas section; a first sampling circuit for extracting a change in gas pressure from the gas pressure detector based on a fault current detection signal; A first failure judgment circuit for judging an accident-occurring gas class when a change in the gas pressure taken out by the sampling circuit exceeds a first threshold value; A cracked gas detector to be detected, a second sampling circuit for extracting a cracked gas concentration from the cracked gas detector, and an accident-causing gas when the cracked gas concentration extracted by the second sampling circuit exceeds a second threshold value. A second failure determination circuit for determining a category;
And the first failure determination circuit based on the determination output of the second failure determination circuit.
An operation control circuit for determining that a failure has occurred in the gas section of the metal container when a decomposition gas exceeding the second threshold is generated in the gas section in which the pressure rise exceeding the threshold has occurred. Therefore, the accuracy of the failure determination of the electric device can be improved, and the time required to confirm the failed part can be shortened.

As described above, the failure judging device for a gas-insulated electric device according to the third aspect of the present invention includes a cylindrical metal container and a power imposed inside the metal container filled with an insulating gas. In a failure determination apparatus for a gas-insulated electrical device, the conductor and a plurality of insulating spacers that insulate and support the power-carrying conductor from the metal container and partition the inside of the metal container as a gas section perform failure determination of the gas-insulated electrical device. An impact gas pressure detector that detects an impact gas pressure of the gas section, a relay circuit that captures an operation signal of the impact gas pressure detector, and a decomposition gas detector that ionizes and detects the decomposition gas of the gas section. A sampling circuit for taking out the concentration of the cracked gas from the cracked gas detector, and a case where the concentration of the cracked gas taken out by the sampling circuit exceeds a predetermined threshold value. A failure determination circuit that determines the generated gas category, and based on the outputs of the relay circuit and the failure determination circuit, a cracked gas exceeding the predetermined threshold is generated in the gas category where the impact gas pressure detector has operated. In this case, since the arithmetic and control circuit for determining that a failure has occurred in the gas section of the metal container is provided, the accuracy of the failure determination of the electric device can be improved, and the confirmation time of the failed portion can be reduced. This has the effect.

As described above, the failure judging device for a gas-insulated electric device according to the fourth aspect of the present invention includes a cylindrical metal container and a power imposed inside the metal container filled with insulating gas. In a failure determination apparatus for a gas-insulated electrical device, the conductor and a plurality of insulating spacers that insulate and support the power-carrying conductor from the metal container and partition the inside of the metal container as a gas section perform failure determination of the gas-insulated electrical device. An optical sensor that detects an arc light leaking when a failure occurs in the gas section, a relay circuit that captures an operation signal of the optical sensor, a decomposition gas detector that ionizes and detects decomposition gas in the gas section, A sampling circuit for extracting the concentration of the cracked gas from the cracked gas detector; and an accident when the concentration of the cracked gas extracted by the sampling circuit exceeds a predetermined threshold. A failure determination circuit that determines a gas classification, based on the output of the relay circuit and the failure determination circuit, when a decomposition gas exceeding the predetermined threshold is generated in the gas classification where the optical sensor has operated, Since the arithmetic and control circuit for determining that a failure has occurred in the gas section of the metal container is provided, it is possible to improve the accuracy of the failure determination of the electric device and to shorten the time required to confirm the failure site. .

As described above, the failure judging device for a gas-insulated electric device according to claim 5 of the present invention, in the gas judging device for a gas-insulated electric device according to claim 2, leaks when a failure occurs in the gas classification. An optical sensor that detects arc light; and a relay circuit that captures an operation signal of the optical sensor, wherein the arithmetic and control circuit is configured to include the second sensor in the gas section in which the pressure rise exceeds the first threshold. When a decomposed gas exceeding the threshold value is generated, and the gas section and the gas section in which the optical sensor has operated match, it is determined that a failure has occurred in the gas section of the metal container. There is an effect that the accuracy of the failure determination can be improved and the time required to confirm the failure site can be reduced.

As described above, the failure judging device for a gas-insulated electric device according to claim 6 of the present invention is the same as the gas-insulating electric device failure judging device according to claim 2; Since the second sampling circuit is controlled so as to obtain the output of the decomposed gas detector only for the gas segment based on the gas segment information specified by the detector, it is possible to improve the accuracy of the failure determination of the electric device,
This has the effect of shortening the time required to confirm a failed part.

According to a seventh aspect of the present invention, as described above, in the gas insulated electrical equipment failure judging apparatus, the arithmetic and control circuit includes the shock gas. Since the sampling circuit is controlled so as to obtain the output of the decomposed gas detector only for the gas segment based on the gas segment information specified by the pressure detector, the accuracy of the failure judgment of the electric equipment can be improved, This has the effect of shortening the time required for confirmation.

According to an eighth aspect of the present invention, as described above, in the failure judging apparatus for a gas-insulated electric device, the arithmetic and control circuit is provided with the optical sensor. Since the sampling circuit is controlled so as to obtain the output of the decomposed gas detector only for the gas segment based on the gas segment information identified, it is possible to improve the accuracy of the failure determination of the electric equipment, and to confirm the time of the failure site. Can be shortened.

According to a ninth aspect of the present invention, as described above, in the failure judging apparatus for a gas-insulated electrical device according to the fifth aspect, the arithmetic and control circuit includes the gas pressure. The second sampling circuit is controlled so as to obtain the output of the decomposed gas detector only for the gas segment based on the gas segment information specified by the detector and the optical sensor. And it is possible to shorten the time required for confirming a failed part.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a failure determination device for a gas-insulated electrical device according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing an operation of the failure determination device for the gas-insulated electric device according to Embodiment 1 of the present invention.

FIG. 3 is a diagram showing a configuration of a failure determination device for a gas-insulated electrical device according to Embodiment 2 of the present invention.

FIG. 4 is a diagram showing a configuration of a failure determination device for a gas-insulated electric device according to Embodiment 3 of the present invention.

FIG. 5 is a diagram showing a configuration of a failure determination device for a gas-insulated electric device according to Embodiment 4 of the present invention.

FIG. 6 is a diagram showing a configuration of a failure determination device for a gas-insulated electrical device according to Embodiment 5 of the present invention.

FIG. 7 is a diagram illustrating a configuration of a failure determination device for a gas-insulated electric device according to Embodiment 6 of the present invention.

FIG. 8 is a diagram showing a configuration of a failure determination device for a gas-insulated electric device according to a seventh embodiment of the present invention.

FIG. 9 is a diagram showing a configuration of a failure determination device for a gas-insulated electric device according to an eighth embodiment of the present invention.

FIG. 10 is a diagram showing a configuration of a failure determination device for a gas-insulated electric device according to Embodiment 9 of the present invention.

FIG. 11 is a diagram showing a configuration of a conventional failure determination device for gas-insulated electrical equipment.

FIG. 12 is a diagram showing the operation of a conventional failure determination device for gas-insulated electrical equipment.

[Explanation of symbols]

1 metal container, 2 conductors, 3 insulating spacers, 11
Gas pressure detector, 12 sampling circuit, 13 failure judgment circuit, 14 high-speed phenomenon sensor, 15 low-speed phenomenon sensor, 21 decomposition gas detector, 22 decomposition gas detector activation circuit, 23 sampling circuit, 24 failure judgment circuit, 25 Arithmetic control circuit, 26 shock gas pressure detector,
27 relay circuits, 31 optical sensors, 32 relay circuits.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H01H 33/56 H02G 5/06 391 5G365 H02B 13/025 H02H 5/00 D H02G 5/06 391 5/08 B H02H 5/00 H02B 13/06 D 5/08 N (72) Inventor Yasuhiro Maeda 2-3-2 Marunouchi 2-chome, Chiyoda-ku, Tokyo F-term in Mitsubishi Electric Corporation 2G014 AA03 AA04 AB02 AC18 2G015 AA09 CA21 5E050 HA06 5G017 DD01 DD12 EE02 5G028 AA14 GG18 GG21 5G365 DA13 DN05

Claims (9)

[Claims] 1. A metal container having a cylindrical shape, a power conductor accommodated in the metal container filled with an insulating gas, and an insulated support of the power conductor from the metal container. In a failure determination apparatus for a gas-insulated electrical device having a plurality of insulating spacers partitioned as gas sections, the failure determination apparatus for a gas-insulated electrical apparatus includes: A sensor for a phenomenon, a first failure determination circuit for determining the presence or absence of a failure from an output of the sensor for a high-speed phenomenon, and a sensor for a low-speed phenomenon for detecting a low-speed phenomenon associated with a ground fault or short circuit failure in the gas section. A second failure determination circuit that determines the presence or absence of a failure from the output of the low-speed phenomenon sensor; and a gas classification of the metal container in which a failure has occurred from the outputs of the first and second failure determination circuits. Failure determination device for a gas insulated electric apparatus is characterized in that an arithmetic control circuit. 2. A cylindrical metal container, a power conductor accommodated in the metal container filled with an insulating gas, and an insulated support of the power conductor from the metal container to form an inside of the metal container. In a failure determination apparatus for a gas-insulated electrical device having a plurality of insulating spacers partitioned as gas sections, the failure determination apparatus for a gas-insulated electrical apparatus includes: a gas pressure detector configured to detect a change in gas pressure of the gas section; A first sampling circuit that extracts a change in gas pressure from the gas pressure detector based on a detection signal; and an accident occurs when the change in gas pressure extracted by the first sampling circuit exceeds a first threshold. A first failure determination circuit that determines a gas classification; a decomposition gas detector that ionizes and detects a decomposition gas in the gas classification; and a method that extracts a decomposition gas concentration from the decomposition gas detector. A second failure determination circuit that determines an accident-occurring gas classification when the concentration of the decomposed gas taken out by the second sampling circuit exceeds a second threshold value; and the first and second failure determinations. Based on the judgment output of the circuit,
When a decomposition gas exceeding the second threshold is generated in a gas section in which a pressure rise exceeding the first threshold has occurred, an operation for determining that a failure has occurred in the gas section of the metal container. A failure judging device for a gas insulated electric device, comprising: a control circuit. 3. A cylindrical metal container, a power conductor accommodated in the metal container filled with an insulating gas, and an insulating support for the power conductor from the metal container. A failure determination device for a gas-insulated electrical device that determines a failure of a gas-insulated electrical device having a plurality of insulating spacers partitioned as gas sections, wherein: a shock gas pressure detector that detects an impact gas pressure of the gas section; A relay circuit that captures an operation signal of the pressure detector; a cracked gas detector that ionizes and detects cracked gas in the gas section; a sampling circuit that extracts cracked gas concentration from the cracked gas detector; A failure determination circuit that determines an accident-occurring gas classification when the obtained decomposition gas concentration exceeds a predetermined threshold; the relay circuit and the failure determination circuit Based on the output of
When a decomposition gas exceeding the predetermined threshold is generated in the gas section where the impact gas pressure detector has operated, an operation control circuit for determining that a failure has occurred in the gas section of the metal container is provided. A failure determination device for a gas-insulated electrical device. 4. A cylindrical metal container, a power conductor accommodated in the metal container filled with an insulating gas, and an insulated support of the power conductor from the metal container to form an inside of the metal container. A failure determination device for a gas-insulated electrical device having a plurality of insulating spacers partitioned as gas sections and performing a failure determination on the gas-insulated electrical apparatus, comprising: an optical sensor that detects arc light leaking when a failure occurs in the gas section; A relay circuit that captures an operation signal of the sensor, a cracked gas detector that ionizes and detects cracked gas in the gas section, a sampling circuit that extracts cracked gas concentration from the cracked gas detector, and a sampling circuit that is extracted by the sampling circuit. A failure judgment circuit for judging an accident-occurring gas classification when the decomposition gas concentration exceeds a predetermined threshold; Based on power
An operation control circuit for determining that a failure has occurred in the gas section of the metal container when a decomposition gas exceeding the predetermined threshold is generated in the gas section where the optical sensor has operated. Characteristic failure determination device for gas insulated electrical equipment. 5. An optical sensor for detecting arc light leaking when a failure occurs in the gas section; and a relay circuit for receiving an operation signal of the optical sensor, wherein the arithmetic and control circuit sets the first threshold value. When a decomposed gas exceeding the second threshold is generated in the gas section where the exceeded pressure rise has occurred, and the gas section matches the gas section where the optical sensor has operated, the gas in the metal container is 3. The apparatus according to claim 2, wherein it is determined that a failure has occurred in the section. 6. The arithmetic and control circuit according to claim 2, wherein said second control means obtains an output of said decomposed gas detector only for said gas division based on the gas division information specified by said gas pressure detector.
3. The failure judging device for a gas-insulated electric device according to claim 2, wherein the sampling circuit is controlled. 7. The arithmetic control circuit controls the sampling circuit so as to obtain an output of the decomposed gas detector only for the gas segment based on the gas segment information specified by the impact gas pressure detector. Claim 3 characterized by the following:
The device for determining a failure of a gas-insulated electric device according to the above. 8. The arithmetic and control circuit controls the sampling circuit so as to obtain the output of the decomposed gas detector only for the gas segment based on the gas segment information specified by the optical sensor. The apparatus for determining a failure of a gas-insulated electrical device according to claim 4. 9. The operation control circuit according to claim 2, wherein said second control means obtains an output of said decomposed gas detector only for said gas section based on said gas section information specified by said gas pressure detector and said optical sensor. The apparatus according to claim 5, wherein the apparatus controls a sampling circuit.