JP2021174815A - Tank type static guidance device - Google Patents

Abstract

To appropriately diagnose a winding insulation abnormality in a tank type static guidance device in which the main body of the static guidance device is housed in a closed state in a tank.SOLUTION: A tank type static guidance device 1 includes a tank 2, a stationary induction device main body 5 that is housed in the tank 2 in a closed state and whose winding 6 is wound around an iron core 7, and an ozone detection unit 12 provided in the tank 2 for detecting ozone generated due to an insulation abnormality of the winding 6.SELECTED DRAWING: Figure 1

Description

An embodiment of the present invention relates to a tank-type stationary induction device.

In the tank type static guidance device in which the static guidance device main body is housed in the tank in a sealed state, the voltage of the high-voltage side winding among the windings constituting the static guidance device main body is high.

Japanese Unexamined Patent Publication No. 63-200508

Therefore, there is a possibility that an insulation abnormality may occur in the winding, and when the insulation abnormality occurs, the pressurized air sealed in the tank is decomposed by the discharge due to the insulation abnormality, and ozone is generated. Under these circumstances, a configuration is assumed in which the insulation abnormality of the winding is diagnosed by detecting ozone in the tank. In this case, it is assumed that an ozone detection unit for detecting ozone is provided outside the tank, and ozone generated in the tank flows to the ozone detection unit outside the tank through a pipe to detect ozone. However, in the configuration in which the ozone detection unit is provided outside the tank, the distance from the location where the insulation abnormality occurs to the ozone detection unit is long, and it takes time for the ozone generated in the tank to flow to the ozone detection unit outside the tank. Further, if the amount of ozone generated is small, there is a concern that the ozone generated in the tank will not flow to the ozone detection unit outside the tank. In that case, it becomes difficult to properly diagnose the insulation abnormality of the winding.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a tank-type stationary induction device capable of appropriately diagnosing an insulation abnormality of a winding.

The tank-type static induction device according to the embodiment includes a tank, a static induction device main body in which the winding is wound around an iron core and is housed in the tank in a sealed state, and the winding provided in the tank. It is provided with an ozone detection unit for detecting ozone generated due to an insulation abnormality.

Longitudinal side view showing the first embodiment The figure which shows the positional relationship between the irradiation light and a winding The figure explaining the mode that ozone is absorbed Longitudinal side view showing a configuration in which an oxygen concentration adjusting unit is provided. Longitudinal side view showing a configuration in which a plurality of ozone detection units are provided. Longitudinal side view showing a configuration in which a light guide tube is provided Longitudinal side view showing the second embodiment The figure which shows the mode that ozone touches a discolored part Longitudinal side view showing a configuration in which a discoloring material is applied to the entire surface of the stationary induction device main body and the lead wire. Longitudinal side view showing a configuration in which a color measuring device is provided Longitudinal side view showing a configuration in which a light guide tube is provided Longitudinal side view showing a third embodiment The figure which shows the mode that ozone touches a resistor sensor. Longitudinal side view showing a fourth embodiment Longitudinal side view showing a modified example The figure which shows the mode of detecting ozone Longitudinal side view showing a modified example

Hereinafter, the tank-type stationary induction device according to the embodiment will be described with reference to the drawings. In the description of the plurality of embodiments, substantially the same constituent parts may be designated by the same reference numerals, and the description may be omitted. Further, in the following description, the vertical direction means the vertical direction when the tank type stationary guidance device is normally installed.

(First Embodiment)
The first embodiment will be described with reference to FIGS. 1 to 6. As shown in FIG. 1, in the tank type stationary induction device 1, the metal tank 2 is a combination of a box member 3 having an opening 3a on the upper surface and a flat plate-shaped lid member 4, and the opening of the box member 3. The inside of the portion 3a is sealed by being closed by the lid member 4. The static induction device main body 5 is housed in the tank 2, and pressurized air as a cooling medium is sealed in the tank 2. The stationary induction device main body 5 is housed in the tank 2 in a form of being placed on an insulating support (not shown). The pressurized air is air having a pressure exceeding atmospheric pressure, does not contain oil, has high cleanliness, and has a dew point guaranteed to be, for example, minus 60 degrees or less. Pressurized air is produced by, for example, an oilless compressor, a multi-stage dehumidifier, an adsorption filter, or the like.

The static induction device main body 5 is configured by winding a winding 6 around an iron core 7. The winding 6 is composed of a high-voltage side winding 6a for inputting high-voltage power and a low-voltage side winding 6b for outputting low-voltage power when applied to a power system, for example, and the high-voltage side winding 6a is a low-voltage side winding. It is provided on the outer peripheral side of the wire 6b. The entire surface of each of the high-voltage side winding 6a and the low-voltage side winding 6b is covered with an insulating member such as resin to be insulated. A gap portion 6c penetrating in the vertical direction is provided between the high-voltage side winding 6a and the low-voltage side winding 6b by a spacer (not shown). That is, the gap portion 6c is a part of the circulation path through which the pressurized air passes. The high-voltage side may be referred to as the primary side, and the low-voltage side may be referred to as the secondary side.

High-voltage side lead wires 8a and 8b are connected to the high-voltage side winding 6a. The high-voltage side outlet wires 8a and 8b have a flexible characteristic that can be easily bent, and are connected to the high-voltage side terminals 10a and 10b attached to the lid member 4. The low-voltage side lead wires 9a and 9b are connected to the low-voltage side winding 6b. The low-voltage side outlet wires 9a and 9b have a flexible characteristic that can be easily bent, and are connected to the low-voltage side terminals 11a and 11b attached to the lid member 4. The high-pressure side terminals 10a and 10b and the low-pressure side terminals 11a and 11b are, for example, T-type bushings and direct mold bushings. During normal operation of the static guidance device main body 5, the temperature of the pressurized air around the static guidance device main body 5 rises due to the heat generated by the static guidance device main body 5, and the pressured air whose temperature has risen rises. Ascend in tank 2.

In the tank 2, since the voltage of the high-voltage side winding 6a is high, there is a risk that an insulation abnormality may occur in the winding 6, and when an insulation abnormality occurs, the pressurized air is decomposed by the discharge due to the insulation abnormality and ozone. May occur. Therefore, it is possible to diagnose an insulation abnormality by detecting ozone in the tank 2.

An ozone detection unit 12 for detecting ozone in the tank 2 is provided in the tank 2. Specifically, the ozone detection unit 12 includes a light emitting unit 13 provided on the upper surface of the bottom surface of the box member 3, that is, the lower portion in the tank 2, and the lower surface of the lid member 4, that is, the upper portion in the tank 2. Includes a light receiving unit 14 provided in. As shown in FIG. 2, the light emitting unit 13 and the light receiving unit 14 face each other in the vertical direction of the gap portion 6c between the high-voltage side winding 6a and the low-voltage side winding 6b described above. Neither the high-voltage side outlet wires 8a and 8b and the low-voltage side outlet wires 9a and 9b exist between the light emitting unit 13 and the light receiving unit 14. Therefore, the irradiation light emitted from the light emitting unit 13 passes through the void portion 6c and is received by the light receiving unit 14 without being shielded by any of the high-voltage side outlet lines 8a and 8b and the low-voltage side outlet lines 9a and 9b. .. The light receiving unit 14 has a function of wirelessly communicating data with an external device (not shown) provided outside the tank 2, for example, and when receiving the irradiation light emitted from the light emitting unit 13, the received irradiation light of the received irradiation light is received. The light receiving intensity is transmitted to an external device. When the external device receives the light receiving intensity transmitted from the light receiving unit 14, the external device compares the received light receiving intensity with the threshold value and outputs the comparison result.

When an insulation abnormality occurs in the winding 6, the pressurized air is decomposed and ozone is generated due to the discharge due to the insulation abnormality. Ozone has a characteristic of absorbing light having a specific wavelength near 250 nm in ultraviolet rays, for example. Therefore, if ozone is generated due to a discharge due to an insulation abnormality, as shown in FIG. 3, the irradiation light emitted from the light emitting unit 13 is emitted. Of these, light having a specific wavelength near 250 nm is absorbed by ozone, and the light receiving intensity of the irradiation light received by the light receiving unit 14 changes accordingly. Therefore, in the external device, ozone can be detected by detecting a change in the light receiving intensity of light having a specific wavelength near 250 nm in the light receiving intensity transmitted from the light receiving unit 14, and the insulation abnormality of the winding 6 can be detected. Can be diagnosed.

For example, the external device compares the light receiving intensity of light having a specific wavelength near the wavelength of 250 nm among the light receiving intensities transmitted from the light receiving unit 14 with the threshold value, and if the light receiving intensity is equal to or higher than the threshold value, ozone is not detected. judge. On the other hand, if the light receiving intensity is less than the threshold value, the external device determines that ozone is detected and outputs, for example, an alarm indicating an insulation abnormality. By outputting an alarm from the external device, the operator can recognize the insulation abnormality of the winding 6. As a mode in which the external device outputs an alarm, the alarm is displayed or voiced on the own device, or the alarm is displayed on the mobile terminal by transmitting the alarm signal to the mobile terminal carried by the worker. There are modes such as audio output.

Further, the external device is not limited to the configuration in which the light receiving intensity is determined as the threshold value and an alarm is output, and only the numerical value of the light receiving intensity may be output. Further, the external device may calculate the difference between the light receiving intensity and the threshold value to calculate the degree of ozone detection, and output the degree of insulation abnormality based on the calculated degree of ozone detection. That is, the external device determines that the degree of insulation abnormality is relatively small by determining that the difference between the light receiving intensity and the threshold value is relatively small, while determining that the difference between the light receiving intensity and the threshold value is relatively large. By doing so, it may be determined that the degree of insulation abnormality is relatively large. With the configuration in which the light emitting unit 13 and the light receiving unit 14 are used as the ozone detecting unit 12 in this way, ozone can be optically detected based on the light receiving intensity of the irradiation light emitted from the light emitting unit 13 in the light receiving unit 14. , The insulation abnormality of the winding 6 can be optically diagnosed.

According to the first embodiment, in the tank type static induction device 1, an ozone detection unit 12 for detecting ozone generated due to an insulation abnormality of the winding 6 is provided in the tank 2, and therefore ozone detection. The distance from the location where the insulation abnormality occurs to the ozone detection unit 12 can be reduced when compared with the configuration in which the unit is provided outside the tank 2. As a result, various problems assumed in the configuration in which the ozone detection unit is provided outside the tank 2 can be solved, the ozone generated in the tank 2 can be appropriately detected, and the insulation abnormality of the winding 6 can be appropriately diagnosed. can do.

Since the light emitting unit 13 and the light receiving unit 14 are used as the ozone detecting unit 12 and the ozone is detected based on the light receiving intensity when the irradiation light emitted from the light emitting unit 13 is received by the light receiving unit 14, ozone is detected. Can be optically detected, and the insulation abnormality of the winding 6 can be optically diagnosed.

Further, since there is no shield such as the high-voltage side outlet wires 8a and 8b and the low-voltage side outlet wires 9a and 9b between the light emitting unit 13 and the light receiving unit 14, the irradiation light emitted from the light emitting unit 13 Is not shielded by a shield, but passes through the gap 6c and is received by the light receiving unit 14, so that ozone generated in the tank 2 can be detected more appropriately.

Further, a configuration in which high-concentration oxygen is sealed in the tank 2 may be used. With this configuration, the amount of ozone generated when an insulation abnormality occurs can be increased, and the accuracy of diagnosing the insulation abnormality of the winding 6 can be improved. Further, the oxygen concentration of the gas in the tank 2 may be adjustable. Specifically, as shown in FIG. 4, the oxygen concentration adjusting unit 15 for adjusting the oxygen concentration of the gas in the tank 2 may be provided via the pipe 16. With this configuration, the oxygen concentration of the gas in the tank 2 can be adjusted by the oxygen concentration adjusting unit 15 during the insulation diagnosis for diagnosing the insulation abnormality of the winding 6 and the normal normal operation when the tank type stationary induction device 1 is normally operated. Can be adjusted by. At the time of insulation diagnosis, the insulation abnormality of the winding 6 can be appropriately diagnosed by increasing the oxygen concentration of the gas in the tank 2, and during normal operation, the effect of ozone is reduced by suppressing the oxygen concentration of the gas in the tank 2. can do.

Further, although the configuration in which one ozone detection unit 12 is provided is illustrated above, a configuration in which a plurality of ozone detection units 12 are provided may be used as shown in FIG. With this configuration, the ozone concentration is detected higher as it is closer to the location where the insulation abnormality occurs. Therefore, the location where the insulation abnormality occurs can be specified by comparing the ozone concentrations in the plurality of ozone detection units 12. .. For example, the light receiving intensities of the irradiation light in the plurality of light receiving units 14 are compared, and if there is a difference in the light receiving intensities, the one closer to the smaller ozone detecting unit 12 is insulated instead of the ozone detecting unit 12 having the larger light receiving intensity. It can be identified that an abnormality has occurred.

Further, instead of providing the entire light emitting unit 13 and the entire light receiving unit 14 in the tank 2, a part of the light emitting unit and a part of the light receiving unit may be provided in the tank 2. Specifically, as shown in FIG. 6, the light emitting unit 17 has a light emitting unit 18 outside the tank and a light emitting side light guide tube 19 led out from the light emitting unit 18 outside the tank. The tip portion 19a of the light emitting side light guide tube 19 is provided in the vicinity of the connection portion between the high-voltage side outlet wires 8a and 8b and the high-voltage side winding 6a in the tank 2. The light receiving unit 20 has a light receiving unit 21 outside the tank and a light receiving tube 22 on the light receiving side derived from the light receiving unit 21 outside the tank. The tip portion 22a of the light receiving side light guide tube 22 is provided in the vicinity of the connection point between the high voltage side outlet wires 8a and 8b and the high voltage side winding 6a in the tank 2. Since the connection point between the high-voltage side outlet wires 8a and 8b and the high-voltage side winding 6a is the high electric field portion, the tip portion 19a of the light emitting side light guide tube 19 and the tip portion 22a of the light receiving side light guide tube 22 are the tank 2 It is provided in the vicinity of the high electric field portion inside. The tip 19a of the light emitting side light guide tube 19 and the tip 22a of the light receiving side light guide tube 22 face each other. Further, the high-voltage side outlet wires 8a and 8b do not exist between the tip portion 19a of the light emitting side light guide tube 19 and the tip portion 22a of the light receiving side light guide tube 22.

The irradiation light emitted from the light emitting portion 18 outside the tank passes through the light emitting side light guide tube 19 and is emitted from the tip 19a of the light emitting side light guide tube 19 and enters the tip 22a of the light receiving side light guide tube 22. It is lit and passes through the light receiving tube 22 on the light receiving side to be received by the light receiving portion 21 outside the tank. In this case as well, the irradiation light emitted from the light emitting portion 18 outside the tank is received by the light receiving portion 21 outside the tank without being shielded by the shield, and the ozone generated in the high electric field portion inside the tank 2 is more appropriate. Can be detected. Further, it is sufficient that a part of the light emitting side light guide tube 19 and a part of the light receiving side light guide tube 22 are provided in the tank 2, and if the light emitting portion 18 outside the tank and the light receiving portion 21 outside the tank are arranged outside the tank 2. Therefore, it is not necessary to arrange the out-of-tank light emitting portion 18 and the out-of-tank light receiving portion 21 on which the conductor parts such as electronic parts are mounted in the vicinity of the high electric field portion, and the out-of-tank light emitting portion 18 and the out-of-tank light receiving portion 21 Operation can be guaranteed.

(Second Embodiment)
The second embodiment will be described with reference to FIGS. 7 to 11. The first embodiment is a configuration for optically detecting ozone, while the second embodiment is a configuration for chemically detecting ozone. As shown in FIG. 6, in the tank type stationary guidance device 31, the metal tank 32 is a combination of a box member 33 having an opening 33a on the upper surface and a flat plate-shaped lid member 34, and the side surface of the box member 33. An observation window 35 made of, for example, a transparent resin is provided at a predetermined portion of the above. In the tank 32, as the ozone detection unit 36, a coloring member 38 is provided at a predetermined portion on the side surface of the stationary induction device main body 5 via an insulating plate 37. The surface of the coloring member 38 is coated with a discoloring material that discolors when it comes into contact with ozone to form a discoloring portion 39. The discoloring material is, for example, indigo. The observation window 25 and the discolored portion 39 are opposed to each other, and there is no shield between the observation window 25 and the discolored portion 39. That is, the discolored portion 39 can be visually recognized from outside the tank 32 through the observation window 35.

When an insulation abnormality occurs in the winding 6, the pressurized air is decomposed and ozone is generated due to the discharge due to the insulation abnormality. In this case, as shown in FIG. 8, when ozone comes into contact with the discolored portion 39 of the coloring member 38, the discolored portion 39 discolors, so that the discolored state of the discolored portion 39 is visually observed from outside the tank 32 through the observation window 35. As a result, ozone can be detected, and an insulation abnormality of the winding 6 can be appropriately diagnosed.

According to the second embodiment, since the discoloration unit 39 is used as the ozone detection unit 36 and ozone is detected based on the discoloration state of the discoloration unit 39, ozone can be chemically detected and the winding can be wound. The insulation abnormality of 6 can be chemically diagnosed. Further, since the observation window 35 is provided, ozone can be detected by visually observing the discolored state of the discolored portion 39 from outside the tank 32 through the observation window 35. Further, since there is no shield between the observation window 35 and the discolored portion 39, the discolored state of the discolored portion 39 can be appropriately visually observed from outside the tank 32 through the observation window 35.

As in the first embodiment, the tank 32 may be sealed with high-concentration oxygen, or the oxygen concentration of the gas in the tank 32 may be adjustable. Further, a configuration in which a plurality of ozone detection units 36 are provided may be provided, that is, a configuration in which a plurality of discoloration units 39 are provided may be provided. In that case, one observation window 35 may be provided for each of the plurality of discolored portions 39, or a plurality of observation windows 35 may be provided for each of the plurality of discolored portions 39. In the configuration in which the plurality of discolored portions 39 are provided, the location where the insulation abnormality occurs can be specified from the location where the discolored portion 39 is provided and the degree of discoloration. That is, if there is a difference in the degree of discoloration, it can be identified that the insulation abnormality has occurred not in the discolored portion 39 having the smaller degree of discoloration but in the one closer to the discolored portion 39 having the larger degree of discoloration.

Further, as shown in FIG. 9, the discoloring material is coated on the entire surface of the stationary induction device main body 5, the entire surface of the high-voltage side outlet wires 8a and 8b, and the entire surface of the low-voltage side outlet wires 9a and 9b. The entire surface of the stationary induction device main body 5, the entire surface of the high-voltage side outlet wires 8a and 8b, and the entire surface of the low-voltage side outlet wires 9a and 9b may be the discolored portion 40. In that case, the observation window 35 may be provided according to the size of the area of the discolored portion 40. With this configuration, the area of the discolored portion 40 that is in contact with ozone is increased, so that the discolored portion and the location where the insulation abnormality occurs can be identified from the degree of discoloration. That is, if there is a difference in the degree of discoloration, it can be identified that the insulation abnormality occurs not in the portion where the degree of discoloration is small but in the portion closer to the larger portion. Further, as shown in FIG. 10, a color measuring device 41 may be provided in the observation window 35, and the discolored state of the discolored portion 39 may be monitored by the color measuring device 41.

Further, a discolored portion may be provided at a portion of the high-voltage side outlet wires 8a and 8b near the connection portion of the high-voltage side winding 6a. Specifically, as shown in FIG. 11, a coloring member 43 is provided on the high-voltage side lead wires 8a and 8b near the connection portion of the high-voltage side winding 6a via the insulating plate 42. The surface of the color-forming member 43 is coated with a discoloring material that discolors when it comes into contact with ozone to form a discoloration portion 44. The tip 46a of the light guide tube 46 derived from the color measuring device 45 and the discolored portion 44 face each other. Further, there is no shield between the tip portion 46a of the light guide tube 46 and the discolored portion 44. Also in this case, ozone generated in the high electric field portion in the tank 32 can be detected more appropriately. Further, in this case, the observation window 35 can be eliminated.

(Third Embodiment)
The third embodiment will be described with reference to FIGS. 12 to 13. The third embodiment is a configuration in which ozone is electrically detected. As shown in FIG. 12, in the tank type stationary guidance device 51, the metal tank 52 is configured by combining a box member 53 having an opening 53a on the upper surface and a flat plate-shaped lid member 54. As the ozone detection unit 55, a resistor sensor 56 is provided at a predetermined portion on the inner wall surface of the box member 53 in the tank 52, and a resistance value measuring device 57 is provided outside the tank 52. The resistor sensor 56 is energized from the resistance value measuring device 57 via an electric wire (not shown).

When an insulation abnormality occurs in the winding 6, the pressurized air is decomposed by the discharge due to the insulation abnormality and ozone is generated. In this case, as shown in FIG. 13, when ozone comes into contact with the resistor sensor 56, the resistance value of the resistor sensor 56 changes. Therefore, the change state of the resistance value is detected by the resistance value measuring device 57. Ozone can be detected, and the insulation abnormality of the winding 6 can be appropriately diagnosed.

According to the third embodiment, the resistor sensor 56 is used as the ozone detection unit 55, and ozone is detected based on the change state of the resistance value. Therefore, ozone can be electrically detected and the winding is wound. The insulation abnormality of No. 6 can be electrically diagnosed.

As in the first embodiment, the tank 52 may be sealed with high-concentration oxygen, or the oxygen concentration of the gas in the tank 52 may be adjustable. Further, a configuration in which a plurality of ozone detection units 55 are provided may be provided, that is, a configuration in which a plurality of resistor sensors 56 are provided may be provided. In the configuration in which the plurality of resistor sensors 56 are provided, the location where the resistor sensor 56 is provided and the location where the insulation abnormality occurs can be specified from the degree of change in the resistance value. That is, if there is a difference in the degree of change in the resistance value, it can be identified that the insulation abnormality occurs not in the part where the degree of change in the resistance value is small but in the part closer to the larger part. ..

(Fourth Embodiment)
The fourth embodiment will be described with reference to FIGS. 14 to 15. The fourth embodiment is configured to have a radiator. As shown in FIG. 14, the tank-type static induction device 61 includes a main body accommodating portion 62, a radiator 63, an upper connecting portion 64 connecting the main body accommodating portion 62 and the radiator 63 on the upper side, and a main body accommodating portion 62. It is provided with a lower connection portion 65 for connecting the radiator 63 and the radiator 63 on the lower side. The main body accommodating portion 62 is configured by combining a box member 66 having an opening 66a on the upper surface and a flat plate-shaped lid member 67. The stationary guidance device main body 5 is housed in the main body accommodating portion 62. The radiator 63 has a radiator structure and has a function of cooling pressurized air. During normal operation of the static guidance device main body 5, the temperature of the pressurized air around the static guidance device main body 5 rises due to heat generation of the static guidance device main body 5. The pressurized air whose temperature has risen rises in the main body accommodating portion 62, passes through the upper connecting portion 64, flows to the radiator 63, and is cooled by the radiator 63. The pressurized air cooled by the radiator 63 descends in the radiator 63, passes through the lower connection portion 65, returns to the inside of the main body accommodating portion 62, and further rises in temperature, so that the inside of the main body accommodating portion 62 Ascend. In this way, the pressurized air circulates between the main body accommodating portion 62 and the radiator 63.

An ozone detection unit 68 is provided on the upper connection unit 64. In this case, the ozone detection unit 68 may be any of the light emitting unit 13 and the light receiving unit 14 described in the first embodiment, the discoloring unit 39 described in the second embodiment, and the resistor sensor 56 described in the third embodiment. .. That is, the ozone detection unit 68 may detect ozone optically, chemically, or electrically. Further, a fan 69 is provided in the lower connecting portion 65. The fan 69 corresponds to a blower. When the fan 69 is driven, it blows air from the radiator 63 toward the main body accommodating portion 62.

According to the fourth embodiment, even in a configuration in which the tank-type stationary induction device 61 is provided with a radiator 63, ozone can be appropriately detected, and an insulation abnormality of the winding 6 can be appropriately diagnosed. Further, since the fan 69 is configured to blow air from the radiator 63 toward the main body accommodating portion 62, the convection of ozone can be promoted, and ozone can be detected more appropriately.

(Other embodiments)
Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

As shown in FIG. 15, a sampling unit 71 for collecting gas in the tank 2 is provided outside the tank 2, and by connecting the sampling container 72 to the sampling unit 71, the gas in the tank 2 can be collected. After collecting in the sampling container 72 through 71, as shown in FIG. 16, by connecting the sampling container 72 to the ozone measuring device 73, the gas in the tank 2 collected in the sampling container 72 is analyzed and ozone is collected. It may be configured to detect. With this configuration, ozone can be detected without providing an ozone detection unit in the tank 2, and an insulation abnormality of the winding 6 can be diagnosed. Insulation diagnosis can be performed on a plurality of tank-type stationary induction devices 1 by one ozone measuring device 73. Further, as shown in FIG. 17, the ozone measuring device 73 may be directly connected to the sampling unit 71 without using the sampling container 72.

In the drawing, 1, 31, 51, 61 are tank type static induction devices, 2, 32, 52, 62 are tanks, 5 is the static induction device main body, 6 is winding, 6a is high pressure side winding, and 6b is low pressure side. Winding, 7 is iron core, 12, 36, 55, 68 are ozone detection part, 13 is light emitting part, 14 is light receiving part, 15 is oxygen concentration adjustment part, 35 is observation window, 39, 40 is discolored part, 41 is Color measuring device, 56 is a resistor sensor, 62 is a main body housing part, 63 is a radiator, 64 is an upper connection part (connection part), 65 is a lower connection part (connection part), 69 is a fan (blower part). be.

Claims (14)

With the tank
A static induction device body that is housed in the tank in a sealed state and whose windings are wound around an iron core.
A tank-type stationary induction device provided in the tank and provided with an ozone detection unit for detecting ozone generated due to an insulation abnormality of the winding. The tank-type stationary induction device according to claim 1, wherein high-concentration oxygen is sealed in the tank. The tank-type stationary induction device according to claim 1 or 2, further comprising an oxygen concentration adjusting unit for adjusting the oxygen concentration of the gas in the tank. The tank-type stationary induction device according to any one of claims 1 to 3, wherein a plurality of ozone detection units are provided. The ozone detection unit includes a light emitting unit that emits irradiation light and a light receiving unit that receives the irradiation light emitted from the light emitting unit, and the irradiation light emitted from the light emitting unit is received by the light receiving unit. The tank-type stationary induction device according to any one of claims 1 to 4, which detects ozone based on the light receiving intensity at that time. The tank type according to claim 5, wherein the ozone detection unit is provided so that the irradiation light emitted from the light emitting unit passes between the high-voltage side winding and the low-voltage side winding in the winding. Static induction device. The tank-type stationary induction device according to any one of claims 1 to 4, wherein the ozone detection unit includes a discoloration unit that is discolored by ozone, and detects ozone based on the discoloration state of the discoloration unit. The tank-type static induction device according to claim 7, wherein the discolored portion is coated on the surface of the winding or contained in the insulating resin of the winding. The tank-type stationary induction device according to claim 7 or 8, wherein the tank is provided with an observation window that makes the discolored portion visible from outside the tank. The tank-type stationary induction device according to claim 9, further comprising a color measuring device for measuring the color of the discolored portion from outside the tank through the observation window. The tank type according to any one of claims 1 to 4, wherein the ozone detection unit includes a resistor sensor whose electric resistance value changes with ozone, and detects ozone based on the electric resistance value of the resistor sensor. Static guidance device. The tank-type static induction device according to any one of claims 7 to 10, wherein the ozone detection unit is provided in the vicinity of a high electric field unit. The tank includes a main body accommodating portion for accommodating the static induction device main body, a radiator, and a connecting portion for connecting the main body accommodating portion and the radiator.
The tank-type stationary induction device according to any one of claims 7 to 11, wherein the ozone detection unit is provided in the connection unit. The tank-type stationary induction device according to claim 13, further comprising a blower unit for sending gas in the main body accommodating unit to the ozone detection unit.

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