JP2000115924A - Cubicle type transformer facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent burning of a transformer and occurrence of malfunctioning of electronic apparatuses such as a relay caused by an inside temperature rise, by putting a heat sink having a corrugated cross section over nearly the entire surface of the ceiling board of a central box above an exhaust pipe. SOLUTION: Above a exhaust pipe 22, a heat sink 23 having a corrugated cross section is put and fixed approximately over the whole surface of the ceiling board of a central casing 2, and an exhaust pipe 22 is arranged in its mountainous spaces. As the result of this, heat inside the central casing 2 radiated from the exhaust pipe 22 is transmitted to the heat sink 23, and along with it, radiated from its surface into the atmosphere. At this time, the surface area of the heat sink 23 becomes very wide and heat is effectively radiated, and a temperature rise inside the central casing 2 can be suppressed. Accordingly, it is possible to prevent burning of a transformer, and occurrence of malfunctioning of electronic apparatuses such as a relay, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cubicle-type substation, and its object is to increase the amount of heat radiation to suppress the rise in internal temperature and to reduce the size of the equipment. It is to provide a simple cubicle type substation equipment.

[0002]

2. Description of the Related Art Conventionally, cubicle-type substation equipment has been widely used as a high-voltage substation equipment used as a power source for shield machines for tunnel excavation, underground welding machines, underground lighting, and the like. Such cubicle-type substation equipment used in a mine is required to be as small as possible from the viewpoint of securing a passage in a long and narrow mine, and to use an oil-immersed transformer that may cause an explosion or fire. Use dry or molded transformers because they are very dangerous;
And the like.

[0003]

However, since dry-type transformers and molded transformers generate much more heat than oil-immersed transformers, if the cubicle-type substation equipped with these transformers is downsized as it is, Transformers may be burned out due to a rise in internal temperature or malfunctions of electronic devices such as relays may occur.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and the invention according to claim 1 is directed to a central housing having a built-in transformer, and a power distribution control device. A dry-type cubicle-type substation facility, comprising a primary housing and a secondary housing having embedded therein, wherein the primary housing and the secondary housing are integrally arranged on both sides of the central housing. An exhaust pipe is provided through the ceiling plate of the central housing, and a heat sink having a cross-sectional waveform is mounted on substantially the entire ceiling plate of the central housing above the exhaust pipe. Related to cubicle-type substation equipment.
The invention according to claim 2 is characterized in that a cover plate is provided above the primary housing and / or the secondary housing with a gap between the ceiling plate and the ceiling plate, and the gap between the ceiling plate and the cover plate is located at the center. 2. The cubicle-type substation according to claim 1, wherein the cubicle-type substation is connected to an internal space of the housing. The invention according to claim 3 is that the front cover plate of the central housing is
3. The cubicle-type substation according to claim 1, wherein the cubicle-type substation is divided into a plurality of pieces. These inventions have succeeded in solving all of the above problems.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a cubicle-type substation according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a first embodiment of a cubicle-type substation facility according to the present invention, and FIG. 2 is a top view thereof. As shown in the figure, a cubicle-type substation equipment (1) according to the present invention includes a central housing (2) with a built-in transformer, a primary housing (3) with a built-in primary switchboard, and a secondary switchboard. A secondary housing (4) is built in, and the primary housing (3) and the secondary housing (4) are arranged on the left and right sides with the central housing (2) interposed therebetween. Are integrated.

In the cubicle type substation equipment (1) according to the present invention, for example, a high voltage of about 3000 to 6000 V is input to a primary switchboard inside a primary housing (3), and this input high voltage is applied to a central housing (2). 100 to 4 transformers inside
The voltage is reduced to about 00 V, and the reduced voltage is output to the outside from the secondary switchboard inside the secondary housing (4). The transformer inside the central housing (2) does not use insulating oil to reduce the risk of explosion and fire, and is insulated using high heat-resistant insulators such as Nomex paper and glass fiber. Dry transformers and molded transformers using synthetic resins. The values of the input voltage and the output voltage described above are exemplary values, and the input / output voltage value is not particularly limited in the cubicle-type substation equipment (1) according to the present invention. For example, the input voltage is 6000 V and the output voltage is 3000 V. It may be.

[0007] In the present invention, it is preferable that the front cover plate (25) of the central housing (2) in which the transformer is built is divided into a plurality of sheets, and each plate can be detached separately. Conventionally, since the front cover plate has conventionally been constituted by a single plate, when the user attempts to switch the primary side voltage tap, a large and heavy iron plate is removed and the switching operation is performed. And the workability was very poor. The number and size of divisions of the front cover plate (25) are not particularly limited. However, as shown in FIG. 1, the front cover plate (25) is divided into two parts, a narrow upper plate (25a) and a wide lower plate (25b). Preferably, each plate can be individually removed. This is because the primary side voltage tap is usually provided at the upper part of the transformer, and if the primary side voltage tap is divided as shown in FIG. This is because there is an advantage that the work can be performed by removing only the upper plate.

FIG. 3 is an enlarged view showing a part of the upper part of the central housing (2) of the cubicle type substation equipment (1) shown in FIG. As shown in the figure, in the cubicle-type substation facility (1) according to the present invention, a large number of exhaust pipes (22) are provided upright in the vertical direction so as to pass through the ceiling plate (21) of the central housing (2). . The exhaust pipe (22) is fixed to the ceiling plate (21) by appropriate means such as welding. Exhaust pipe (2
2) is open at the upper and lower ends, so that heat generated by a transformer or the like disposed inside the central housing (2) passes through the exhaust pipe (22) through the ceiling plate (21), and the upper part is opened. The temperature rise inside the central housing (2) can be effectively suppressed.

A radiating plate (23) having a corrugated cross section is mounted and fixed over substantially the entire surface of the ceiling plate (21) of the central casing (2) above the exhaust pipe (22).
The exhaust pipe (22) is located in the space of the mountain-shaped portion. As a result, the heat inside the central housing (2) released from the exhaust pipe (22) is transmitted to the radiator plate (23) and is radiated from the surface of the radiator plate (23) to the atmosphere. At this time, since the cross-section of the heat radiating plate (23) is corrugated, the surface area of the heat radiating plate (23) becomes very large, heat is effectively radiated, and the temperature inside the central housing (2) rises. It can be suppressed more effectively.

FIG. 4 is a schematic sectional view showing a part of the cubicle type substation equipment (1) shown in FIG. 1 from a part of a central housing (2) to a primary housing (3). As shown in the figure, a cover plate (32) is provided above the primary housing (3) with a gap between the primary housing (3) and the ceiling plate (31). The space (33) between the ceiling plate (31) and the cover plate (32) communicates with the internal space (24) of the central housing (2). With this configuration, part of the heat generated in the internal space (24) of the central housing (2) flows into the space (33) above the primary housing (3), and the central housing (2)
Heat accumulation inside can be prevented.

In the illustrated example, a cover plate is provided above the primary housing (3) with a gap above the ceiling plate. However, in the present invention, not only the primary housing (3) but also the secondary housing (3) is provided. It is preferable that a cover plate is provided above the next housing (4) with a gap between itself and the ceiling plate. By adopting the same configuration as the upper part of the primary housing (3) also at the upper part of the secondary housing (4), the heat generated in the internal space (24) of the central housing (2) is transferred to the upper part of the primary housing. Since it flows into not only the air gap but also the air gap above the secondary housing, the temperature rise inside the central housing (2) can be more effectively suppressed.

Further, by providing a cover plate with an air gap between the primary housing (3) and / or the secondary housing (4) and a ceiling plate, the housings (3) and (4) are provided.
The ceiling has a double structure consisting of a ceiling plate and a cover plate.
High-voltage electric wire support insulators and fluorescent lamps for lighting inside the housing, which had to be mounted using special fittings such as angle materials, in the upper space of the primary housing (3) and the secondary housing (4). Can be directly attached to the vehicle, and the mounting operation can be simplified.

FIG. 5 is a front view showing a second embodiment of the cubicle type substation equipment according to the present invention, and FIG. 6 is a portion from a part of a central housing (2) to a primary housing (3) in FIG. FIG. FIG. 5 shows a state where the front cover plate of the central housing (2) is removed. In the cubicle type substation equipment according to the second embodiment, a large number of exhaust pipes (22) are erected vertically so as to penetrate the ceiling plate (21) of the central housing (2). The configuration in which the heat radiating plate (23) having a corrugated cross section is placed and fixed over substantially the entire surface of the ceiling plate (21) of the central housing (2) is the same as in the first embodiment,
The primary housing (3) and the central housing (2) are separated by a partition plate (5), and the ceiling plate (3) of the primary housing (3) is separated.
The configuration in which 1) is not a double structure is different from that of the first embodiment. Although not shown, in the second embodiment, the upper part of the secondary housing (4) has the same structure.

In the cubicle-type substation according to the second embodiment, heat inside the central housing (2) is exhausted by the exhaust pipe (22).
Through the surface of the radiator plate (23) into the atmosphere, the temperature inside the central housing (2) rises compared to a conventional device without the exhaust pipe (22) and the radiator plate (23). However, the heat inside the central housing (2) is blocked by the partition plate (5) and the primary housing (3)
Since it cannot flow into the upper part of the secondary housing (4), the effect of suppressing the temperature rise inside the central housing (2) is inferior to that of the first embodiment.

[0015]

EXAMPLES The effects of the present invention will be further clarified by showing examples and comparative examples of the cubicle type substation equipment according to the present invention. However, the present invention is not limited at all by the following examples. (Example 1) The cubicle type substation equipment of the first embodiment having the configuration shown in FIGS. 1 to 4 was replaced with the short-circuit method specified by the Institute of Electrical Engineers of Japan, JEC-2200 (1995). Operate by the equivalent load method) to raise the temperature of the upper part of the secondary coil inside the central housing to 16 times per hour.
Measured over time. The ceilings of the primary housing and the secondary housing were both structured as shown in FIG. (Example 2) The cubicle-type substation equipment according to the second embodiment having the configuration shown in FIGS. 5 and 6 was operated under the same conditions as in Example 1, and the upper part of the secondary coil inside the central housing was mounted. Temperature was measured every hour for 16 hours. The ceilings of the primary housing and the secondary housing were both structured as shown in FIG. (Comparative example) The exhaust pipe penetrating the ceiling plate of the central housing and the heat sink having a cross-sectional waveform are not provided, and the ceilings of the primary housing and the secondary housing have a single structure, and the central housing, the primary housing and Example 1 except that the inside of the secondary housing was isolated
Example 1 of cubicle-type substation equipment with the same structure as
Operating under the same conditions as in Examples 1 and 2, the temperature at the top of the secondary coil inside the central housing was measured every hour for 16 hours.

Incidentally, the external dimensions of the apparatuses of the above-mentioned Examples 1, 2 and Comparative Examples were 3550 mm in width × 47 in depth.
It is equal to 0 mm × 900 mm in height, and the internal structures of the primary housing, the secondary housing, and the central housing are all the same. The ambient temperature of the cubicle type substation at the time of measurement was about 2
9 ° C.

Table 1 and FIG. 7 show the measurement results of Example 1, Example 2, and Comparative Example. In the graph of FIG. 7, black circles indicate Example 1, black triangles indicate Example 2, and white circles indicate Comparative Example. The temperature at 0 hour in Table 1 and FIG. 7 indicates the ambient temperature (about 29 ° C.).

[Table 1]

As shown in Table 1 and FIG. 7, in the cubicle type substation of the comparative example, JEC-2200 was used after 7 hours.
The temperature exceeded the limit of 140 ° C. + ambient temperature (about 29 ° C.), which is the temperature rise limit of the class H dry transformer specified in (1995), and the equilibrium temperature reached about 200 ° C. In contrast, Example 1
The equilibrium temperature is suppressed to about 140 ° C. in the cubicle-type substation equipment of No. 1, and the equilibrium temperature is suppressed to about 170 ° C. in the cubicle-type substation equipment of Example 2.
0 (1995), the temperature rise limit of the class H dry-type transformer of 140 ° C. + ambient temperature (about 29 ° C.). From these results, according to the cubicle-type substation equipment according to the present invention, it was possible to keep the temperature of the central housing low even with the same size as the conventional device. Therefore, it is considered that the size of the device can be reduced by increasing the heat radiation amount. Further, since the temperature rise of Example 1 was lower than that of Example 2, the ceiling of the primary housing and the ceiling of the secondary housing were both made to have a double structure, and the gap obtained by the double structure was formed inside the central housing. It was found that the temperature rise can be more effectively suppressed by communicating with the space.

In the present invention, the structure of the primary side switchboard and the secondary side switchboard, and the type and number of transformers are not particularly limited, and any known structure generally used for cubicle type substation equipment is suitable. Can be adopted.

[0020]

As described above, the invention according to claim 1 comprises a central housing in which a transformer is built, a primary housing and a secondary housing in which a power distribution control device is built, and a primary housing. A dry-type cubicle-type substation in which a casing and a secondary casing are integrally disposed on both sides of a central casing, and an exhaust pipe is provided through a ceiling plate of the central casing. The cubicle-type substation is characterized in that a radiator plate having a corrugated cross section is mounted on the upper part of the exhaust pipe over substantially the entire ceiling plate of the central housing, so that the following effects are obtained. In other words, heat generated in a transformer or the like inside the central housing can be radiated from the surface of the heat sink to the atmosphere by passing through the exhaust pipe. The rise can be effectively suppressed, and burnout of the transformer due to temperature rise inside the central housing and malfunction of electronic devices such as relays can be prevented.

According to a second aspect of the present invention, a cover plate is provided above the primary housing and / or the secondary housing with a gap between the ceiling plate and the ceiling plate. The cubicle-type substation according to claim 1, wherein the air gap communicates with the internal space of the central housing, so that the following effects are obtained. In other words, the heat generated inside the central housing can be radiated to these spaces by effectively utilizing the upper space of the primary housing and the secondary housing, which was previously wasted space. However, the temperature rise inside the central housing can be effectively suppressed. In addition, since the ceiling has a double structure consisting of a ceiling plate and a cover plate, it is possible to directly attach high-voltage wire support insulators and fluorescent lamps for lighting inside the housing to the ceiling plate, simplifying the installation work compared to the past. Can be.

According to a third aspect of the present invention, in the cubicle-type substation according to the first or second aspect, the front cover plate of the central housing is divided into a plurality of sheets. When switching the voltage tap on the next side, the work of removing and attaching the front cover plate can be easily performed by one person, and the workability is excellent.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of a cubicle-type substation facility according to the present invention.

FIG. 2 is a top view showing the first embodiment of the cubicle-type substation equipment according to the present invention.

FIG. 3 is an enlarged view showing a part of an upper portion of a central housing of the cubicle-type substation shown in FIG. 1;

FIG. 4 is a schematic sectional view showing a part from a part of a central housing to a primary housing of the cubicle type substation shown in FIG. 1;

FIG. 5 is a front view showing a second embodiment of the cubicle-type substation equipment according to the present invention.

FIG. 6 is a schematic cross-sectional view showing a portion from a part of a central housing to a primary housing in FIG. 5;

FIG. 7 is a graph showing a temperature rise test result of the cubicle-type substation according to the present invention and a conventional cubicle-type substation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cubicle-type substation equipment 2 Central casing 21 Ceiling board 22 Exhaust pipe 23 Heat sink 24 Internal space of central casing 25 Front cover plate 3 Primary casing 33 Air gap above primary casing 4 Secondary casing

Claims (3)

[Claims] 1. A central housing in which a transformer is built, a primary housing and a secondary housing in which a power distribution control device is built, and the primary housing and the secondary housing are on both sides of the central housing. A dry-type cubicle-type substation facility, which is integrally disposed with an exhaust pipe passing through a ceiling plate of the central housing, and a ceiling plate of the central housing substantially above the exhaust pipe. A cubicle-type substation, wherein a heat sink having a cross-sectional waveform is mounted on the entire surface. 2. A cover plate is provided above the primary housing and / or the secondary housing with a gap between the ceiling plate and the ceiling plate of the housing, and the gap between the ceiling plate and the cover plate is formed inside the central housing. 3. The cubicle-type substation according to claim 1, wherein the substation is connected to a space. 3. The cubicle-type substation equipment according to claim 1, wherein the front cover plate of the central housing is divided into a plurality of sheets.