JPH11326429A - Insulation diagnostic method and device for dry insulation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply diagnose in a field a deteriorated condition of insulation for a dry insulation equipment. SOLUTION: This insulation diagnostic device 2 is provided with an infrared radiation thermometer 7 for detecting a temperature distribution of a solid insulation part of a mold transformer 1 contactlessly in a working condition, a clamp type high frequency CT 8 attached contactlessly to a grounding wire 5 of the mold transformer 1 for detecting partial discharge current, a high frequency filter 9, a high frequency amplifier 10 and a digital oscilloscope 11, and a personal computer 6 for storing preliminarily a temperature characteristic data at the time of delivery, a deterioration characteristic data of an insulation component with the lapse of time, and the partial discharge characteristic data, and for analyzing a detected temperature data and a partial discharge data to diagnose a deteriorated condition of the insulation. The device 2 is carried-in to a field installed with the mold transformer 1, and diagnoses an abnormal heating part, a deterioration condition of the insulation with the lapse of time, a partial discharge deterioration condition, a remainder life, and an over-all insulation deterioration state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulation diagnosis of a dry insulation device for diagnosing a state of deterioration of the insulation of a dry insulation device which is insulated by air and a solid insulation portion such as a dry transformer or a molded transformer. A method and an apparatus therefor.

[0002]

For example, some transformers used for electric power, industrial use, etc., have been manufactured for a considerable number of years. In the event of a power outage, the impact on society will be significant. For this reason, this type of transformer is often required to be inspected and diagnosed particularly for those that have been used for a long time since being manufactured, or to be regularly inspected and diagnosed irrespective of the years of use. ing.

[0003] Among these types of transformers, oil-immersed transformers and gas-insulated transformers have insulating mineral oil and SF6 gas used as insulating and cooling media, which are sealed in a container. By extracting and analyzing a part of the insulating mineral oil or SF6 gas, it is possible to diagnose aging or abnormal deterioration. On the other hand, in the case of using air as an insulation and cooling medium, such as a silicone dry-type transformer and a mold transformer, a part of the insulation and cooling medium is removed because it is used in an open state. It cannot be diagnosed.

[0004] For this reason, with regard to this type of silicone dry type transformer or molded transformer, when the transformer is stopped (in a power failure state), necessary equipment is brought in and an insulation test or a partial discharge test is performed to perform insulation required as equipment. It is common practice to diagnose whether or not it has performance. However, this diagnostic method grasps the ability of the transformer to pass the specified insulation test at that time, and cannot perform the diagnosis of the degree of insulation deterioration or remaining life.

In order to diagnose the degree of deterioration and remaining life of this type of silicone dry type transformer or molded transformer, the transformer is taken to a factory or the like, and an insulation test or a dielectric breakdown test of each component is performed. In addition, a method of sampling the material in that portion and examining the characteristics of the material and comparing it with the initial state or the deterioration characteristics of the material has been used to calculate the degree of deterioration. Therefore, this method is a destructive diagnostic method.To reuse the transformer, it is necessary to repair the damaged or sampled part or make a new one, and it is not strictly a diagnosis of the transformer. Was. In addition, when many transformers are used in the same environment, one transformer is subjected to destructive inspection, and the diagnosis result is used to estimate the degree of deterioration and remaining life of other transformers. I was

On the other hand, in principle, non-destructive diagnosis of the deterioration of the insulating layer can be considered from the electrical characteristics. However,
As described above, this type of dry-type transformer is insulated from the solid insulating material and air, and has a large dependence on the air portion of the insulating component. Diagnosing the remaining life was practically impossible. Diagnosis based on the measurement of partial discharge has also been attempted, but in the methods considered so far, it is necessary to bring in and connect an application device or the like in a power failure state, and perform measurement. Had become something. In addition, when partial discharge has not occurred, it is only possible to determine that the device can be used at that time, and no diagnosis has been made.

As described above, conventionally, it has not been possible to perform a nondestructive and simple deterioration diagnosis on a dry transformer in which the insulating component is a composite insulation of air and solid insulation. In addition, when estimating the degree of deterioration of another transformer by destructive inspection of one transformer, a large cost is required for diagnosis, and there is a problem that the diagnosis of the machine itself is not performed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for diagnosing insulation of a dry-type insulating device in a non-destructive and simple manner on the insulation of the dry-type insulating device. Another object of the present invention is to provide an insulation diagnosis apparatus for a dry insulation device suitable for performing the insulation diagnosis method.

[0009]

SUMMARY OF THE INVENTION The forms of insulation deterioration in dry insulation equipment in which insulation is achieved by a solid insulation part and air are mainly heat deterioration and partial discharge deterioration. Of these, thermal degradation is a major factor in the aging degradation of dry insulation equipment. From the chemical reaction kinetics, the life L due to thermal degradation is
ogL = A + B / T (where T: absolute temperature, A, B:
(A constant determined by the material and the insulating configuration).

[0010] If the quantity representing the change in the chemical structure due to the thermal degradation of the material is X, the characteristic P of the material is P = f
(X) is determined as a function of X. Therefore, in the dry insulation equipment, if the thermal history of the solid insulation part and the thermal deterioration characteristics of the material are known, the state of the aging of the part can be estimated.

On the other hand, degradation due to partial discharge generally occurs as follows:
It is said that the degree of deterioration increases in proportion to various partial discharge amounts such as discharge energy, discharge charge amount, and number of generated discharges, but the degree of deterioration considerably varies depending on each insulating material and insulating configuration. Therefore, the diagnosis can be performed while comparing various partial discharge amounts, based on the discharge deterioration characteristics of each insulation configuration of the device to be diagnosed.

According to a first aspect of the present invention, there is provided a method for diagnosing the deterioration of insulation of a dry insulation device, wherein the insulation is diagnosed by a solid insulation portion and air. It is characterized in that the temperature distribution of the device is detected in a non-contact manner, and the aged deterioration state of the device is diagnosed based on the detected temperature distribution and the known thermal deterioration characteristics of the solid insulating portion.

According to a ninth aspect of the present invention, there is provided an insulation diagnostic apparatus for dry-type insulation equipment for performing the method, wherein the temperature detection means detects a temperature distribution of the equipment in an operating state in a non-contact manner. Storage means for storing thermal degradation characteristic data of the solid insulation portion; and diagnostic means for diagnosing the aging state of the device from the temperature distribution detected by the temperature detection means and the thermal degradation characteristic data. Having.

According to this, the temperature of each part of the solid insulation part is detected in a non-contact manner and compared with the known thermal deterioration characteristics of the solid insulation part, so that the thermal conductivity of the material of the solid insulation part is deteriorated. It can be determined whether it has changed. Therefore, it is possible to bring the diagnostic device to the installation location of the device and diagnose the deterioration state at the site while the device is in the operating state.

At this time, if the contact resistance increases in the electrical connection portion of the device or an arc discharge or the like occurs due to disconnection or the like, the temperature of that portion becomes higher than usual, so that such a temperature distribution is Diagnosis of the abnormal heating section can be performed together (the invention of claim 2).

According to a third aspect of the present invention, there is provided a method of diagnosing insulation of a dry insulation device, wherein the aging of the dry insulation device is diagnosed based on a use history of the dry insulation device and a known thermal deterioration characteristic of the solid insulation part. Have. According to a tenth aspect of the present invention, there is provided an insulation diagnostic apparatus for a dry insulation apparatus, which is an apparatus for performing the method, comprising: an input unit for inputting a use history of the dry insulation apparatus; It is characterized by comprising storage means for storing deterioration characteristic data, and diagnosing means for diagnosing the aged deterioration state of the device from the use history input by the input means and the thermal deterioration characteristic data.

According to this, the state of thermal degradation of the solid insulation part can be estimated by comparing the input use history of the equipment with the known thermal degradation characteristics of the solid insulation part. In this case, the deterioration state can be diagnosed only by inputting information without bringing the device to the installation site of the device.

According to a fourth aspect of the present invention, there is provided a method for diagnosing insulation of a dry insulation device, wherein the absorption spectrum of the solid insulation portion is measured by a contact-type infrared spectroscopic sensor while the dry insulation device is stopped, and the absorbance spectrum is measured. It is characterized in that the aged deterioration state of the device is diagnosed by comparing with a known absorbance spectrum at the time of thermal deterioration of the material of the solid insulating portion. At this time, it is more effective if the measurement of the absorbance spectrum is performed only on the high temperature portion (the invention of claim 5).

An insulation diagnostic apparatus for dry insulation equipment according to claim 11 of the present invention is an apparatus for performing the method,
A contact-type infrared spectroscopy sensor for measuring the absorbance spectrum of the solid insulation portion of the dry insulation device in a stopped state, storage means for storing absorbance spectrum data at the time of thermal degradation of the material of the solid insulation portion, Diagnostic means for comparing the absorbance spectrum measured by the spectroscopic analysis sensor with the absorbance spectrum data to diagnose the aged deterioration state of the device. At this time, a temperature detecting means for detecting the temperature distribution of the operating device in a non-contact manner may be provided (the invention of claim 12).

According to this, it is possible to diagnose the degree of thermal deterioration with high accuracy based on the measurement of the absorbance spectrum of the solid insulation part. The deterioration state can be diagnosed with high accuracy on site. At this time, it is necessary to stop the device, but since the deterioration diagnosis based on the absorbance spectrum is sufficient for the high temperature part, the temperature distribution is detected in advance and the diagnosis for the high temperature part is performed. By doing so, it is possible to easily make a diagnosis in a short time.

According to a sixth aspect of the present invention, there is provided a method for diagnosing a state of insulation deterioration of a dry-type insulating device in which insulation is performed by a solid insulating portion and air. The method is characterized in that a partial discharge current flowing through a ground wire of the device is detected in a non-contact manner, and a partial discharge deterioration state of the device is diagnosed from the detected current signal and a known discharge deterioration characteristic of an insulation configuration of the device. Having.

According to a thirteenth aspect of the present invention, there is provided an insulation diagnostic apparatus for a dry insulation apparatus for performing the method.
Current detection means for detecting a partial discharge current flowing through the ground wire of the dry-type insulated equipment in an operating state in a non-contact manner, storage means for storing discharge deterioration characteristic data of the insulation configuration of the equipment, and detection by the current detection means Diagnostic means for diagnosing the partial discharge deterioration state of the device from the current signal and the discharge deterioration characteristic data.

According to this, the current signal detected by the current detecting means in a non-contact manner is analyzed to determine the partial discharge amount, and as described above, the partial discharge amount and the discharge characteristic of the insulation configuration of the equipment are determined. Based on the above, the degree of deterioration can be diagnosed. Therefore, bring the diagnostic device to the installation location of the equipment,
At the site, the degradation state can be diagnosed while the equipment is in the operating state.

In addition, both the aged deterioration state of the equipment diagnosed by the method of any one of claims 1 to 5 and the partial discharge deterioration state of the equipment diagnosed by the method of claim 6 are comprehensively obtained. The insulation deterioration state may be diagnosed first (the invention according to claim 7), and a more accurate diagnosis can be performed by performing a comprehensive diagnosis. Further, the remaining life of the device can be determined from one or both of the diagnosed aged deterioration state and the partial discharge deterioration state (the invention of claim 8), and it is possible to know an appropriate time to replace the device. And other useful diagnostic results.

According to a fourteenth aspect of the present invention, there is provided an insulation diagnostic apparatus for a dry-type insulation device, wherein the temperature detection means detects a temperature distribution of the dry-type insulation device in an operating state in a non-contact manner to carry out the method of the seventh aspect. Current detecting means for detecting a partial discharge current flowing through a ground line of the device in an operating state in a non-contact manner, and storage for storing thermal deterioration characteristic data of a solid insulation portion and discharge deterioration characteristic data of an insulation configuration of the device. Means for diagnosing the aging state of the device from the temperature distribution detected by the temperature detecting means and the thermal deterioration characteristic data, and from the current signal detected by the current detecting means and the discharge deterioration characteristic data. Diagnostic means for diagnosing the partial discharge deterioration state of the device.

According to a fifteenth aspect of the present invention, there is provided an insulation diagnostic apparatus for a dry-type insulating device, wherein the input means for inputting a use history of the dry-type insulating device and the operating state of the dry-type insulating device are provided for performing the method of the seventh aspect. Current detecting means for detecting a partial discharge current flowing through a ground line of the device in a non-contact manner; storage means for storing thermal deterioration characteristic data of a solid insulation portion and discharge deterioration characteristic data of an insulation configuration of the device; and the input means Diagnosis of the aged deterioration state of the device from the use history and the heat deterioration characteristic data inputted by the device, and the partial discharge deterioration state of the device from the current signal detected by the current detecting means and the discharge deterioration characteristic data. Diagnostic means for diagnosing the condition.

According to these, not only the aging state and the partial discharge deterioration state of the device can be diagnosed respectively, but also a more accurate diagnosis can be performed by performing a comprehensive diagnosis from both of them. Is also possible.

Further, in each of the above-mentioned devices of claims 9 to 15, the storage means and the diagnosis means can be constituted by a computer (the invention of claim 16), and the storage and diagnosis can be performed efficiently. Further, the computer may be constituted by a mobile computer carried on site and a host computer for transmitting data to and from the mobile computer (the invention of claim 17). A host computer having a large storage capacity and capable of performing calculations at high speed can be used as the storage means and the diagnosis means while the mobile computer can be easily carried into the site, and the diagnosis accuracy can be improved.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to diagnosis of insulation deterioration of a molded transformer will be described below with reference to FIGS. This embodiment corresponds to claims 1, 2, 6, 7, 8, 9, 13, 14, and 16. First, FIG. 1 schematically shows a configuration of an insulation diagnosis device 2 according to the present embodiment for diagnosing a deterioration state of a molded transformer 1 as a dry insulation device.

Here, the mold transformer 1 includes an iron core 3
Further, although not shown in detail, the molded coil 4 is resin-molded with a molding resin which is a solid insulating material. The molded transformer 1 is installed in a power transmission and transformation facility in a state where it is open to the atmosphere. The molded transformer 1 is insulated by a solid insulating portion made of a mold resin or the like and air as an insulating and cooling medium. It has become. The molded transformer 1 is grounded by a ground wire 5.

On the other hand, the insulation diagnostic device 2 is configured as follows. That is, the insulation diagnostic device 2
A personal computer 6 for analysis / diagnosis functioning as a storage means and a diagnostic means, an infrared radiation thermometer 7 as a temperature detecting means, a clamp type high frequency CT (current transformer) 8 as a current detecting means, a high frequency filter 9 ,
It comprises a high-frequency amplifier 10 and a digital oscilloscope 11. The insulation diagnostic device 2 is configured to be easily portable as a whole, and can perform measurement and diagnosis at the site where the mold transformer 1 is installed.

As will be described in detail later, the personal computer 6 stores an analysis / diagnosis program, a temperature characteristic data of the mold transformer 1 at the time of shipment, a database of thermal deterioration characteristics of the insulation structure, a partial discharge characteristic. The database is stored. Although not shown, the personal computer 6 includes an input unit such as a keyboard, a display unit such as an LCD for displaying a diagnosis result and the like, and can output the diagnosis result and the like by a printer or the like. It has become. As the personal computer 6, for example, a general-purpose personal computer such as a notebook type personal computer "GTR-575" manufactured by Toshiba can be used.

The infrared radiation thermometer 7 is for detecting the temperature distribution of each part of the mold transformer 1 in a non-contact state while operating, and specifically, for example, “Handy” manufactured by Nippon Avionics. Thermo "," Fine Thermo ",
"Neothermo" and "Thermotracer" manufactured by NEC Sanei
Can be used. This infrared radiation thermometer 7 is RS23
The personal computer 6 is connected to the personal computer 6 via an adapter such as a 2C cable and a PC card, and outputs detected temperature data to the personal computer 6.

The high-frequency CT 8 is attached to the ground line 5 in a non-contact manner to detect a partial discharge current.
Only the high frequency component of the partial discharge current signal detected by the high frequency CT 8 is passed by the high frequency filter 9, amplified by the high frequency amplifier 10, and then input to the personal computer 6 via the digital oscilloscope 11. ing.

More specifically, as the high frequency CT8,
Tokin's "EIP-100", the high-frequency filter 9 may be Advantest's "TR14203", the high-frequency amplifier 10 may be HP's "8447F", and the digital oscilloscope 11 may be Tektronix's "2430A". Note that the digital oscilloscope 11 has:
If it is not necessary to observe the measured waveform, it may be replaced with an A / D converter. In a place where there is much noise, between the high-frequency CT 8 and the high-frequency filter 9,
Needless to say, a low-pass filter may be inserted to cut noise.

As will be described later, the personal computer 6 has a software configuration (execution of an analysis / diagnosis program), and the use conditions (load conditions, ambient temperature conditions, etc.) input by the diagnostic worker. Based on the temperature data captured by the infrared radiation thermometer 7 and the pre-stored temperature characteristic data at the time of shipment and data on the aging characteristics of the insulation structure, diagnosis of the abnormal heating section and molding Diagnosis of the aging deterioration state of the insulation of the transformer 1 is performed. In addition, the remaining life of the mold transformer 1 is also determined.

Then, based on the partial discharge current signal detected by the high-frequency CT 8 and the data of the partial discharge characteristics stored in advance, the partial discharge deterioration state of the mold transformer 1 is diagnosed. In addition,
The remaining life of the mold transformer 1 is also determined. Further, the insulation deterioration state is comprehensively diagnosed from both the diagnosed aging deterioration state and the partial discharge deterioration state.

Next, a procedure for diagnosing the insulation deterioration state of the molded transformer 1 using the insulation diagnosing apparatus 2 configured as described above will be described with reference to FIG. When diagnosing the insulation deterioration state of the mold transformer 1, the above-mentioned insulation diagnosis device 2 is brought to the installation site of the mold transformer 1. In this case, the respective devices constituting the insulation diagnostic device 2 may be connected on site, or may be incorporated in a rack or the like in advance. Then, the diagnostic worker performs a visual inspection of the appearance of the mold transformer 1 and the like, and when no abnormality is particularly observed, the analysis / diagnostic program is started by the insulation diagnostic device 2 and the procedure shown in FIG. Diagnosis is made at.

That is, first, the diagnostic operator inputs the usage conditions such as the rating, the load condition, the ambient temperature condition, etc. of the mold transformer 1 to the personal computer 6 (step S1). Next, the temperature distribution of the mold transformer 1 is detected by the infrared radiation thermometer 7, and the temperature data is taken into the personal computer 6 (step S2). In this case, the infrared radiation thermometer 7 can perform temperature detection in a non-contact manner while the mold transformer 1 is operating.

When the temperature data is captured in this manner, the personal computer 6 diagnoses whether or not abnormal heating has occurred by comparing the temperature data with the temperature characteristic data at the time of shipment of the corresponding device (step S3). With this, the mold transformer 1
If the contact resistance increases at the electrical connection portion or an arc discharge or the like occurs due to disconnection or the like, the temperature of that portion becomes higher than usual, and such an abnormal heating portion can be diagnosed. If it is diagnosed that there is abnormal heating, the result of the diagnosis is output (step S4).

On the other hand, when it is determined that there is no abnormal heating, the equivalent heating temperature and the cumulative heating time are calculated from the detected temperature data and the temperature characteristic data (step S).
5). Then, an aged deterioration diagnosis and a remaining life diagnosis are performed based on the calculation result and the data of the thermal deterioration characteristic of the insulation configuration stored in advance (step S6). As a result, an aging deterioration state due to thermal deterioration of the insulation configuration of the mold transformer 1 is diagnosed, and when the degree of deterioration is large, a message is output stating that precise diagnosis is required or replacement is recommended (step S1). S7). If the degree of deterioration is small, the result of the determination of the remaining life is output (step S8).

When the aged deterioration state is diagnosed as described above,
Next, the high-frequency partial discharge current is measured by the high-frequency CT 8 (step S9). When the partial discharge current is not recognized, only the aging deterioration is diagnosed (step S10). On the other hand, when the occurrence of partial discharge is recognized, the analysis of the partial discharge current signal is performed, and various partial discharge amounts such as the discharge energy, the discharge charge amount, and the number of generations per phase or measurement cycle are obtained. (Step S11).

Then, based on the various amounts of the partial discharge and the data of the discharge characteristics of the insulating structure stored in advance, the diagnosis of the degree of deterioration due to the partial discharge and the diagnosis of the remaining life are performed (step). S12). Thus, the state of insulation deterioration due to partial discharge is diagnosed. Furthermore, from both the aged deterioration state and the remaining life due to the thermal deterioration diagnosed as described above, and the partial discharge deterioration state and the remaining life,
The insulation deterioration state is comprehensively diagnosed, and the diagnosis result is output (step S13).

As described above, according to the present embodiment, the insulation diagnostic apparatus 2 is brought to the place where the mold transformer 1 is installed, and the insulation diagnosis apparatus 2 is operated at the site while the mold transformer 1 is in the operating state. The aged deterioration state and the deterioration state due to partial discharge can be easily diagnosed nondestructively, and a useful diagnosis result can be obtained by judging the remaining life. Then, since the diagnosis of the abnormal heating section is also performed based on the temperature detection, the diagnosis of the electric contact abnormality, the disconnection, and the like can be performed. Further, in the present embodiment, in particular, a highly accurate diagnosis can be performed by performing a comprehensive diagnosis based on the aged deterioration state due to thermal deterioration and the partial discharge deterioration state.

In the above-described first embodiment, both the aged deterioration state of the insulation due to the thermal deterioration and the deterioration state due to the partial discharge are diagnosed, but either one of them can be independently diagnosed. Of course. In the case of diagnosing only partial discharge deterioration, as shown by the path A in FIG. 2, use conditions such as the rating, load condition, and ambient temperature condition of the mold transformer 1 are input to the personal computer 6 (step S1). After that, the procedure may be such that the partial discharge current is measured by the high-frequency CT 8 (step S9).

When the usage history (temperature history) of the dry insulation device to be diagnosed is clear, the temperature measurement with the infrared radiation thermometer 7 is not performed, and the aging deterioration state due to thermal deterioration is performed only by the personal computer 6. Can be diagnosed (corresponding to claims 3, 10, and 15). In this case, as shown by a path B in FIG. 2, by comparing the input use history of the device with the known thermal degradation characteristics of the solid insulation portion,
The state of thermal deterioration can be estimated, and the aging state can be easily diagnosed only by inputting information.

FIG. 3 shows a second embodiment (corresponding to claims 4, 5, 11, and 12) of the present invention. Although illustration of the whole is omitted, the insulation diagnostic apparatus according to this embodiment is configured to measure the absorbance spectrum of the solid insulation part of the mold transformer 1 in addition to the configuration of the insulation diagnostic apparatus 2 of the first embodiment. An infrared spectroscopic sensor 21 is provided. The infrared spectroscopy sensor 21 is brought into contact with the solid insulating portion of the mold transformer 1 in a stopped (power outage) state, irradiates infrared rays, and spectrally measures the reflected light to measure an absorbance spectrum. As the infrared spectroscopy sensor 21, specifically, for example, a probe (light source unit integrated type) of a plastic material discriminator (near infrared spectroscopy) manufactured by Opto Giken Co., Ltd. can be used. A dedicated probe may be manufactured and used.

The absorbance spectrum measured by the infrared spectroscopy sensor 21 is input to the personal computer 6, and the personal computer 6 previously stores an absorbance spectrum database at the time of thermal deterioration of the material of the solid insulating portion of the mold transformer 1. Infrared spectroscopy sensor 2
The aged deterioration state is diagnosed by comparing the absorbance spectrum measured by the method 1 with the absorbance spectrum data.

In this case, in this embodiment, the temperature distribution is detected by the infrared radiation thermometer 7 while the mold transformer 1 is operating, as in the first embodiment. When the thermal deterioration has progressed to some extent, the mold transformer 1 is stopped, and the measurement of the absorbance spectrum by the infrared spectroscopy sensor 21 is performed only on the high-temperature portion of the solid insulating portion, and the aging degradation is performed. Diagnosis of the condition is performed.

According to this, the degree of thermal deterioration can be diagnosed with high accuracy based on the measurement of the absorbance spectrum of the solid insulation portion. At this time, although the power failure of the mold transformer 1 is accompanied, Since it is sufficient to perform the deterioration diagnosis based on the absorbance spectrum for a high-temperature portion, if the diagnosis is performed only for a high-temperature portion, the diagnosis can be easily performed in a short time.

FIG. 4 shows a third embodiment of the present invention.
7 (corresponding to FIG. 7). In this embodiment, instead of the personal computer 6 of the first embodiment, a mobile computer 32 which is carried on site and to which detection signals of the infrared radiation thermometer 7 and the high frequency CT 8 are inputted, and the mobile computer 32 Data is transmitted to the P.32 via a general telephone line, PHS, or the like, and a large-sized host computer 33 that stores various databases and executes data analysis and diagnosis is provided.

According to this, while the mobile computer 32 to be transported to the site can be made small and lightweight, the host computer 33 having a large storage capacity and capable of performing high-speed operations allows storage and data analysis of various databases and data analysis. Diagnosis can be performed, and diagnosis accuracy can be improved. Further, there can be obtained an advantage that data management for a plurality of devices can be centralized by the host computer 33.

In each of the embodiments described above, diagnosis is performed on site, but only measurement of temperature, partial discharge, etc. is performed on site, and the data is stored in a medium such as a floppy disk. Alternatively, the diagnosis may be executed by bringing back the data. In addition, the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications without departing from the gist, for example, the present invention is applicable not only to the molded transformer 1 but also to dry insulation equipment in general. It is.

[0054]

As is apparent from the above description, according to the method for diagnosing insulation of a dry insulation device of the present invention, it is possible to easily diagnose the deterioration state of the insulation of the dry insulation device locally without destruction. It has an excellent practical effect of being able to do so. According to the insulation diagnosis apparatus for dry insulation equipment of the present invention, the insulation diagnosis method is suitable for carrying out the insulation diagnosis method.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an electrical configuration of an insulation diagnosis apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a procedure of insulation diagnosis.

FIG. 3 shows a second embodiment of the present invention, and is a block diagram showing an electrical configuration of a main part.

FIG. 4 is a view corresponding to FIG. 1, showing a third embodiment of the present invention;

[Explanation of symbols]

In the drawing, 1 is a mold transformer (dry type insulation equipment), 2, 3
1 is an insulation diagnostic device, 4 is a molded coil, 5 is a ground wire,
6 is a personal computer (storage means, diagnostic means),
7 is an infrared radiation thermometer (temperature detecting means), 8 is a high-frequency CT
(Current detecting means), 21 is an infrared spectroscopic sensor, 32 is a mobile computer, and 33 is a host computer.

Claims (17)

[Claims] 1. A method for diagnosing a deterioration state of insulation of a dry insulation device in which insulation is achieved by a solid insulation portion and air, wherein a temperature distribution of the device in an operating state is detected in a non-contact manner. A method for diagnosing the aging of a dry insulation device, comprising diagnosing an aged deterioration state of the device from the measured temperature distribution and a known thermal deterioration characteristic of the solid insulation portion. 2. The method for diagnosing insulation of a dry insulation device according to claim 1, further comprising the step of diagnosing an abnormally heated portion based on the detected temperature distribution. 3. A method of diagnosing a deterioration state of insulation of a dry insulation device in which insulation is achieved by a solid insulation portion and air, comprising: a use history of the device; a known thermal deterioration characteristic of the solid insulation portion; A method for diagnosing the aging of a dry-type insulation device from the following. 4. A method for diagnosing a deterioration state of insulation of a dry-type insulating device in which insulation is achieved by a solid insulating portion and air, wherein the solid-state device is in a stopped state by a contact-type infrared spectroscopic sensor when the device is stopped. A dry insulation device characterized by measuring an absorbance spectrum of the insulating part, comparing the absorbance spectrum with a known absorbance spectrum at the time of thermal deterioration of the material of the solid insulating part, and diagnosing the aging state of the equipment. Insulation diagnosis method. 5. The method for diagnosing insulation of a dry insulation device according to claim 4, wherein the measurement of the absorbance spectrum is performed only for the high-temperature portion. 6. A method for diagnosing a deterioration state of insulation of a dry insulation device in which insulation is achieved by a solid insulation portion and air, wherein a partial discharge current flowing through a ground wire of the device in an operating state is contactlessly contacted. And diagnosing a partial discharge deterioration state of the equipment from the detected current signal and a known discharge deterioration characteristic of the insulation configuration of the equipment. 7. An aged deterioration state of the dry-insulated equipment diagnosed by the method for diagnosing dry-insulated equipment according to any one of claims 1 to 5, and a diagnosis performed by the insulation diagnosis method for dry-insulated equipment according to claim 6. A method for diagnosing the insulation deterioration state comprehensively from both the partial discharge deterioration state of the equipment and the partial discharge deterioration state of the equipment. 8. The insulation diagnosis for dry-type insulation equipment according to claim 1, wherein the remaining life of the equipment is determined from one or both of the diagnosed aging state and partial discharge deterioration state. Method. 9. A device for diagnosing a deterioration state of insulation of a dry-type insulating device in which insulation is achieved by a solid insulating portion and air, wherein a temperature distribution of the device in an operating state is detected in a non-contact manner. Temperature detection means, storage means for storing thermal degradation characteristic data of the solid insulation portion, and diagnostic means for diagnosing the aging state of the device from the temperature distribution detected by the temperature detection means and the thermal degradation characteristic data. An insulation diagnostic device for dry insulation equipment, comprising: 10. An apparatus for diagnosing a deterioration state of insulation of a dry-type insulating device in which insulation is achieved by a solid insulating portion and air, an input means for inputting a use history of the device, and Storage means for storing thermal degradation characteristic data of the solid insulation portion; anddiagnosis means for diagnosing the aging state of the device from the use history and the thermal degradation characteristic data input by the input means. Diagnostic equipment for dry insulation equipment. 11. An apparatus for diagnosing a deterioration state of insulation of a dry insulation device in which insulation is achieved by a solid insulation portion and air, wherein an absorbance spectrum of the solid insulation portion of the device in a stopped state is measured. A contact-type infrared spectroscopy sensor; storage means for storing absorbance spectrum data when the material of the solid insulating portion is thermally degraded; and comparing the absorbance spectrum measured by the infrared spectroscopy sensor with the absorbance spectrum data. Diagnostic means for diagnosing the aged deterioration state of the equipment. 12. The apparatus according to claim 11, further comprising temperature detecting means for detecting a temperature distribution of the equipment in an operating state in a non-contact manner. 13. A device for diagnosing a deterioration state of insulation of a dry-type insulation device in which insulation is achieved by a solid insulation portion and air, wherein a partial discharge current flowing through a ground wire of the device in an operating state is not detected. Current detection means for detecting by contact; storage means for storing discharge deterioration characteristic data of the insulation configuration of the device; partial discharge of the device based on the current signal detected by the current detection means and the discharge deterioration characteristic data. A diagnostic device for a dry-type insulating device, comprising: diagnostic means for diagnosing a deterioration state. 14. A device for diagnosing a deterioration state of insulation of a dry-type insulating device in which insulation is achieved by a solid insulating portion and air, wherein a temperature distribution of the operating device is detected in a non-contact manner. Temperature detecting means, current detecting means for detecting, in a non-contact manner, a partial discharge current flowing in a ground wire of the device in an operating state, heat deterioration characteristic data of the solid insulation portion and discharge deterioration characteristic data of an insulation configuration of the device Diagnosing the aging state of the device from the temperature distribution detected by the temperature detecting means and the thermal deterioration characteristic data, and the current signal detected by the current detecting means and the discharge deterioration Diagnostic means for diagnosing a partial discharge deterioration state of the device from characteristic data. 15. A device for diagnosing a deterioration state of insulation of a dry insulation device in which insulation is achieved by a solid insulation portion and air, an input means for inputting a use history of the device, and operation. Current detection means for detecting a partial discharge current flowing through the ground wire of the device in a non-contact state, and storage means for storing thermal deterioration characteristic data of the solid insulation portion and discharge deterioration characteristic data of the insulation configuration of the device. Diagnosing the aged deterioration state of the device from the use history and the heat deterioration characteristic data input by the input means, and detecting the deterioration of the device from the current signal detected by the current detection means and the discharge deterioration characteristic data. A diagnostic means for diagnosing a partial discharge deterioration state. 16. The storage means and the diagnosis means are constituted by a computer.
The insulation diagnostic device for a dry insulation device according to any one of the above. 17. The dry insulation device according to claim 16, wherein the computer comprises a mobile computer carried on site and a host computer for transmitting data to and from the mobile computer. Insulation diagnostic equipment.