JP2003087914A - Substation for power distribution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a substation for power distribution which has a small installation area, is easy to construct, and facilitates maintenance and inspection works. SOLUTION: This substation 10 for power distribution has a receiving switchgear 21, a transformer 17, and a distribution switchgear 22. A transfer apparatus 26, which can be transferred between a space beneath a transmission tower 1 and a space outside the transmission tower 1, is provided under the transmission tower 1 and the respective apparatuses constituting the substation 10 for power distribution are mounted on the transfer apparatus 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution substation which is a terminal substation in a power transmission system.

[0002]

2. Description of the Related Art FIG. 9 shows an example of a conventional distribution substation disclosed in Japanese Patent Laid-Open No. 2000-13938. In the figure, 1 is a power transmission tower, 2 is a power transmission line, 3 is an aerial terminal, 4
Is a power cable for pulling in, 5 is a gas insulated switchgear,
6 is a transformer, 7 is a switchboard, 8 is the second floor of the substation, 9 is the first floor of the substation, 10 is a substation for distribution, 11 is an overhead line that connects the transmission line 2 and the aerial terminal 3. Is.

The conventional device is installed under the steel tower for the purpose of reducing the installation space of the substation and shortening the connecting cable.
A substation of a layer is provided, and a power line 2 is branched by an overhead line 11 to a gas-insulated switchgear 5 on the second floor, and a transformer 6 on the first floor lowers the voltage to a predetermined voltage. Power is transmitted to a distribution line (not shown).

[0004]

Since the conventional distribution substation has a two-story structure as described above, when the substation is assembled, it is special for carrying in the gas-insulated switchgear 5 on the second floor. There is a problem in that the construction process is complicated and the construction period is lengthened because it requires the production of working tools and the construction work requires construction on the first and second floors. Further, even when parts are replaced during maintenance during operation, there is a problem in that it is difficult to lift heavy objects under the steel tower and it is difficult to carry in and out.

The present invention has been made in order to solve the above problems, and provides a distribution substation which can reduce the installation space of the substation and can easily perform construction work and maintenance work during construction. The purpose is to get.

[0006]

In a distribution substation according to the present invention, a power receiving switchgear, a transformer and a distribution switchgear constituting a distribution substation are arranged below a power transmission tower. A moving device is provided in which each of the devices constituting the distribution substation is mounted so as to be movable between under the tower and outside the tower.

The moving device is a rail extending between the lower part of the steel tower and the outside of the steel tower, and a dolly mounted on the rail.

Further, the rail can be divided into a lower part of the steel tower and a part outside the steel tower.

Further, each device constituting the distribution substation is mounted on a carriage.

Further, each device constituting the distribution substation is dispersed and placed on a plurality of trolleys arranged side by side.

Further, each device constituting the distribution substation is mounted on one carriage.

Further, each device constituting the distribution substation is
The heat dissipation device, the power receiving switchgear, and the power distribution switchgear are mounted on the upper part of the transformer container.

Further, the transformer container is used as a truck.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 to 4 show a distribution substation that is Embodiment 1 of the present invention. FIG. 1 shows a front view of a substation under a steel tower, 1 is a steel tower, 1a is a foot of the steel tower, 1b is a square block-shaped concrete foundation arranged under each foot 1a of the steel tower, 10 is a steel tower 1 A distribution substation arranged in the space between the lower legs 1a, 13 is a drawer device that integrally configures the devices that make up the substation, 14 is a wheel for movement that is attached to the bottom of the drawer device, and 15 is The rail is H-shaped in cross section, which is installed on the ground at the bottom of the steel tower and on which the drawer is placed.

FIG. 2 is a plan view seen from the direction II-II in FIG. 1, in which the drawer device 13 is installed in the lower space of the steel tower 1 surrounded by the four steel tower legs 1a. Rails 15a, 15b are arranged below both sides of the drawer 13 in parallel from below the tower 1 to outside the tower, and the drawer 13 is mounted on the rails. The rails 15a and 15b are separable at a joint 15c. This is to enable the rail 15b on the site outside the steel tower 1 to be removed in a normal state other than during construction / maintenance inspection. A stopper 16a is arranged at the innermost portion of the rail 15a so as to come into contact with the wheel 14 and prevent the drawer device 13 from being pushed in any further. After the drawer device 13 is installed at a predetermined position, stoppers 16b and 16c are brought into contact with the front and rear of the wheel 14 to prevent the drawer device 13 from moving. In addition, 13a has shown the position which pulled out the drawing-out apparatus 13 out of the steel tower 1. As shown in FIG. At this drawn-out position, there is no obstacle around the equipment, so that the equipment can be easily inspected. Also, when disassembling the device mounted on the drawer device 13 for the purpose of maintenance, inspection, replacement, etc., the crane vehicle can be used, and the assembling and disassembling work can be facilitated.

FIG. 3 is a perspective view showing the structure of the drawer device 13. In the figure, 17 is a transformer, and the inside is an oil-filled transformer. By arranging an internal transformer core (not shown) horizontally, the height dimension is made smaller than the width or depth dimension. It is configured to have a rectangular parallelepiped container shape that is thin in the vertical direction as a whole. 18 is the transformer 17
A heat dissipating device for a transformer arranged on the upper part of the container, which is connected to the transformer 17 and includes a heat dissipating fin 20 and a fan 19 for generating an air flow around the heat dissipating fin 20. By disposing the transformer heat dissipating device 18, which occupies a large proportion of the planar area of the transformer, on the upper portion of the transformer 17 main body in this way, the installation area required for the transformer in plan view can be significantly reduced. Therefore, the planar size of the drawer device 13 can be reduced.
Reference numeral 21 denotes a transformer primary-side switchgear connected between the cable 4 of FIG. 9 and the primary side of the transformer 17, and is arranged in the upper part of the container of the transformer 17 side by side with the transformer heat dissipation device 18. There is. Reference numeral 22 denotes a transformer secondary-side switchgear connected to the secondary side of the transformer 17, and a transformer heat-dissipating device 18 and a transformer primary-side switchgear 2 are provided above the container of the transformer 17.
1 are arranged side by side.

The transformer primary-side switchgear 21 and the transformer secondary-side switchgear 22 are arranged side by side with respect to the pull-out direction of the drawer device 13, and the inspection door 21a is openable in the one-side direction. , 22a are arranged so that the inside of the switchgear can be easily inspected. Reference numeral 23 is a tap changer under load. In addition, the transformer 17
By directly attaching the moving wheels 14 to the container, the container of the transformer 17 itself is configured as a carriage. In this way, the container of the transformer 17 is made thin and the wheels 14 are
, Which is also used as a dolly, and its transformer 1
By arranging the transformer heat dissipation device 18, the transformer primary side switchgear 21, the transformer secondary side switchgear 22, the load tap changer 23, and other substation component devices on the upper part of the container of FIG. The height of the trolley can be lowered compared to the case where a dedicated trolley is used. In addition, the transformer 17 which is the heaviest of the substation components
By using the lower layer as a base for assembling, the drawer device 1
It is possible to lower the center of gravity of 3 and pull out equipment 1 due to an earthquake.
It is possible to reduce the possibility of tipping over. Further, the transformer 17 having a large installation area is used as a base for assembling in the substation component equipment in the lower layer, and other equipment is mounted on the upper portion thereof, thereby reducing the planar area of the drawer equipment 13. The drawer device can be made compact. As a result, even if the substation capacity increases and the size of the substation equipment increases, it is possible to deal with the configuration of the drawer device 13 without having to form the substation into two stories as in the conventional case. A combination of a truck including wheels 14 (also used as a transformer 17) and a rail 15 for movably mounting substation equipment is referred to as a moving device 26.

FIG. 4 shows a single-line connection diagram of this distribution substation. 1 is a power transmission tower, 2 is a transmission line, 11 is an overhead line for branching, and 4 is connected to the overhead line 11. Electric power cable
Reference numeral 21 is a transformer primary-side switchgear connected between the power cable 4 and the primary side of the transformer 17 and having a built-in disconnector DS, circuit breaker VCB, grounding switch ES, etc., and 22 is a transformer. A transformer secondary side switchgear that is connected between the secondary side of 17 and a power distribution line (not shown) and has a built-in circuit breaker VCB, earthing switch ES, etc. The side opening / closing device 21 and the transformer secondary side opening / closing device 22 are integrally combined on a trolley to form the drawer device 13.

Embodiment 2. In the first embodiment,
Although the container of the transformer 17 is configured to be used as a dolly, as shown in FIG. 5, a dedicated dolly 24 different from the transformer 17 is used.
Substation components such as the transformer 17, the transformer primary-side switchgear 21, the transformer secondary-side switchgear 22, and the load tap changer 23 may be mounted on the above. In this case, both the height and the installation area of the drawer device 13 are larger than those in the first embodiment, but it can be applied when the installation area under the steel tower 1 has a margin, and each construction / maintenance inspection work can be performed. Makes the work easier.

Embodiment 3. Further, in the second embodiment,
The trolley 24 of the drawer device 13 was integrated, but FIG.
As shown in FIG. 1, the transformer 1 is mounted on the plurality of carriages 24a and 24b.
Substation components such as 7, transformer primary-side switchgear 21, transformer secondary-side switchgear 22, load tap changer 23 and the like may be mounted. In this way, by disposing the substation components on multiple trolleys, the mass of the equipment for each trolley can be reduced, and the pulling out operation can be performed with a lighter force than the integrated one. Therefore, the work becomes easy.

Fourth Embodiment In the first embodiment, the rail 15 is installed directly on the ground, but as shown in FIG. 7, the beam 25 is passed between the foundations 1b of the tower 1 and the rail 15 is installed on this. By doing so, it is possible to simplify the foundation work such as strength and leveling under the rail 15.

Embodiment 5. Although the rail 15 is directly installed on the ground in the first embodiment, the rail 15 is embedded so that the upper surface of the rail 15 is substantially at the same level as the ground as shown in FIG. It is possible to prevent 15 from becoming an obstacle on the surface of the earth, and as shown in FIG.
It becomes unnecessary to divide 5.

[0023]

Since the present invention is constructed as described above, it has the following effects.

A power receiving switchgear, a transformer and a power distribution switchgear constituting a power distribution substation are arranged below the power transmission steel tower, and the respective devices constituting the power distribution substation are installed under the steel tower and outside the steel tower. Since the moving device mounted so as to be movable between the substations is provided, the installation space of the substation can be reduced and the construction work and maintenance work at the time of construction can be easily performed.

Further, since the moving device is a rail extending between the lower part of the steel tower and the outside of the steel tower and a dolly mounted on the rail, the pull-out device can be easily pulled out of the steel tower, and maintenance work can be performed. Can be easily implemented.

Further, since the rail can be divided into the lower part of the steel tower and the outer part of the steel tower, it is possible to prevent the rails outside the steel tower from becoming an obstacle by removing the rail outside the steel tower except during maintenance work. , The effective use of the site becomes possible.

Further, since each device constituting the distribution substation is placed on the trolley, it is possible to pull out the device to the outside of the tower for maintenance / inspection at the time of maintenance work, which facilitates maintenance / inspection work. Become.

Further, since each device constituting the power distribution substation is dispersed and placed on a plurality of trolleys placed side by side, it is possible to reduce the loading mass of each trolley, so that it can be installed outside the tower during maintenance work. Makes it easy to pull out the device.

Further, since each device constituting the distribution substation is placed on one carriage, the substation constituent devices can be constructed compactly.

Further, each device constituting the distribution substation is
Since the heat dissipating device of the transformer, the switchgear for power reception, and the switchgear for power distribution are mounted on the upper part of the transformer container, the substation component equipment can be made compact.

Further, since the transformer container is used as a cart, the substation component equipment can be made more compact. Although the name of the present invention is a distribution substation, it is needless to say that it can be applied not only to general power distribution but also to power distribution within a premises such as a factory or a building.

[Brief description of drawings]

FIG. 1 is a front view of a distribution substation showing a first embodiment of the present invention.

FIG. 2 is a plan view seen from the direction II-II in FIG.

3 is a perspective view of the drawer device of FIG. 1. FIG.

FIG. 4 is a single-line connection diagram showing the configuration of the distribution substation of FIG.

FIG. 5 is a side view of the drawer device showing the second embodiment of the present invention.

FIG. 6 is a side view of the drawer device showing the third embodiment of the present invention.

FIG. 7 is a front view of a distribution substation showing a fourth embodiment of the present invention.

[Fig. 8] Fig. 8 is a front view of a distribution substation base portion showing a fifth embodiment of the present invention.

FIG. 9 is a front view showing a conventional distribution substation.

[Explanation of symbols]

1 steel tower 1b Basic 10 Distribution substation 13 Drawer equipment 15 rails 15a rail 15b rail 17 Transformer 18 Transformer heat dissipation device 21 Transformer primary side switchgear 22 Transformer secondary side switchgear 23 Tap changer under load 24 carts 24a trolley 24b trolley 26 Moving device

Claims (8)

[Claims] 1. A distribution substation comprising a power receiving switchgear, a transformer, and a power distribution switchgear, wherein each of the devices constituting the distribution substation is arranged under a power transmission tower, and the power distribution switchgear is provided. A substation for power distribution, comprising a moving device in which each of the above-mentioned devices constituting the substation is mounted so as to be movable between the underside and the outside of the tower. 2. The distribution substation according to claim 1, wherein the moving device is a rail extending between a lower portion of the steel tower and an outer portion of the steel tower and a carriage mounted on the rail. 3. The distribution substation according to claim 2, wherein the rail can be divided into a lower portion of the steel tower and a portion outside the steel tower. 4. The distribution substation according to claim 1, wherein each of the devices constituting the distribution substation is mounted on a carriage. 5. The substation for distribution according to claim 4, wherein the respective devices constituting the substation for distribution are distributed and placed on a plurality of carriages that are arranged in parallel. 6. The distribution substation according to claim 4, wherein each device constituting the distribution substation is mounted on one carriage. 7. Each device constituting a distribution substation is configured by mounting a heat dissipation device of a transformer, a switchgear for power reception, and a switchgear for distribution on an upper part of a transformer container. The distribution substation according to claim 1. 8. The distribution substation according to claim 7, wherein the transformer container is used as a truck.