JP2004031973A - Gas insulated stationary induction device - Google Patents

Abstract

An object of the present invention is to provide a gas insulated stationary induction device capable of greatly reducing the construction cost of an underground substation by making the entire three-phase device simple and small.
According to the present invention, three units are arranged in a line, and a longitudinal direction of an iron core of each unit of the static induction device is arranged in parallel with a direction in which the three units of the static induction device are arranged. The line side primary lead 12 of the winding is pulled out from the center of the side surface of the cylindrical tank, and the secondary neutral lead 11 of the high voltage side winding and the tap lead 13 of the tap winding and the high voltage side winding are connected. It is characterized in that it is pulled out from a position where the height of the side surface same as the line-side primary lead 12 is low, and is connected to the on-load tap changer by passing through tanks adjacent to each other.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gas-insulated stationary induction device, and more particularly to a gas suitable for a device in which a plurality of units are divided and installed, these are connected in a three-phase connection, and an insulating gas such as SF ₆ gas is sealed. It relates to an insulated stationary induction device.
[0002]
[Prior art]
As the tank of the stationary induction device, for example, a tank as disclosed in Japanese Patent Application Laid-Open No. 56-4218 is used. A static induction device using such a tank usually has various lead wires (primary, secondary, and tertiary lead, secondary neutral lead, tap lead, etc.) in order to minimize the site area. Is pulled out from the tank upper surface to connect each unit.
[0003]
[Patent Document 1]
JP-A-56-4218
[Problems to be solved by the invention]
By the way, if the above-mentioned conventional technique is adopted for a stationary induction device installed in an underground substation or the like, the lead wire is drawn out from the upper surface of the tank, so only the lead wire duct housing the lead wire is used. It requires a height, and when it is used in an underground substation, there is a disadvantage that the underground excavation depth becomes large and the construction cost of the underground substation increases significantly.
[0005]
The present invention has been made in view of the above points, and it is an object of the present invention to provide a gas that can greatly reduce the construction cost even when the entire device is simple and small and used in an underground substation. To provide an insulated stationary induction device.
[0006]
[Means for Solving the Problems]
In the present invention, in order to achieve the above object, one unit has a single-phase configuration, an insulating gas is sealed in each unit, and a plurality of tanks each containing at least the contents of a winding and an iron core, and each unit. The tap changers connected via the respective windings and tap leads are arranged in the same direction, and the tap leads are pulled out from the side surface of the tank, and the drawn tap leads are It is characterized by being connected to the tap changer through a duct and a tank between tanks.
[0007]
Further, a plurality of tanks are arranged in a substantially straight line, and each of the primary leads is pulled out from the center of the side surface of the tank, and these drawn-out primary leads are substantially aligned with the installation direction of the plurality of tanks. It is housed in a common primary lead duct arranged in parallel, a plurality of tanks and tap changers are arranged at predetermined intervals in the same direction, and between adjacent tanks, and between a tank and a tap. The switching devices are connected by tap lead wire ducts disposed between the switching devices, a plurality of tanks and the tap switching device are arranged at a predetermined interval in the same direction, and between adjacent tanks, and between the tanks. And the tap changer are connected by a tap lead wire duct disposed therebetween, and adjacent tanks on the side opposite to the side on which the tap lead wire duct is disposed. It is connected by a lead wire duct arranged between the tanks, a plurality of tanks are arranged substantially linearly, and a cooler is provided for each tank, and the cooler and the cable head are connected. That a plurality of tanks are arranged vertically, and that these are arranged substantially linearly, and that a tap changer is arranged on a part of the side between the tanks; The tanks are set up vertically, and these are arranged in a substantially straight line, and the taps are connected to the tanks. It is characterized in that a switch is arranged.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the gas insulated stationary induction device of the present invention will be described in detail based on the illustrated embodiment. In this embodiment, a gas-insulated transformer will be described as an example.
[0009]
1 and 2 show one embodiment of the gas-insulated transformer of the present invention. As shown in the figure, the gas insulated transformer of the present embodiment has a cylindrical structure in which a unit composed of an iron core 1 and a winding 2 has a single-phase configuration with one unit filled with SF ₆ gas for each unit. It is configured to be housed in a shaped tank 3, and a plurality of these are installed. Each of the cylindrical tanks 3 is installed vertically, and is arranged substantially linearly in a line with the load tap changer 4. The longitudinal direction of the iron core 1 is substantially the same as the arrangement direction of the cylindrical tank 3. They are in the same direction. Each of the adjacent cylindrical tanks 3 has a lead in which a tertiary lead 9, a secondary lead 10, and a secondary neutral point lead 11, which will be described later, disposed on the side of the cylindrical tank 3 are housed. A tap lead wire described later, which is connected by a wire duct 5, is disposed between adjacent cylindrical tanks 3 on the opposite side and between the cylindrical tank 3 and the tap changer 4. 13 are connected by a tap lead wire duct 15 in which the housing 13 is housed. Further, a cooler 14 for cooling the SF ₆ gas is provided for each cylindrical tank 3.
[0010]
A primary lead wire 12 is connected to each winding 2, and each of the primary lead wires 12 is drawn out from the center of the side surface of each cylindrical tank 3. It is housed in a common primary lead duct 16 arranged substantially parallel to the installation direction of the plurality of substantially linearly arranged cylindrical tanks 3. Further, a tertiary cable head 6, a secondary cable head 7, and a secondary neutral cable head 8 for drawing out the tertiary lead 9, secondary lead 10, and secondary neutral lead 11 from each winding 2 as external terminals. The cooler 14 is arranged alternately with each of the tertiary cable head 6, the secondary cable head 7, and the secondary neutral point cable head 8. The tertiary lead 9, the secondary lead 10, and the secondary neutral lead 11 from each winding 2 pass through the above-described lead wire duct 5 disposed between the adjacent cylindrical tanks 3. Then, the cable heads are connected to the respective cable heads 6, 7, 8 and the primary-side bus through the inside of the cylindrical tank 3.
[0011]
Reference numeral 13 denotes a tap lead wire for connecting each winding 2 and the load tap changer 4. The tap lead wire 13 is drawn out of each winding 2 from the side surface of each cylindrical tank 3, and is used for a tap lead wire from this side surface. It passes through the inside of the adjacent cylindrical tank 3 through the duct 15, and further passes through the inside of the tap lead wire duct 15 and the cylindrical tank 3, and is connected to the on-load tap changer 4.
[0012]
According to such a configuration of the present embodiment, a plurality of cylindrical tanks are installed vertically and these are arranged in a substantially straight line, so that the entire apparatus is simple and compact. Of course, since the longitudinal direction of the iron core is the same as the arrangement direction of the plurality of cylindrical tanks, each lead wire can be pulled out from the side of the cylindrical tank, so the installation height of the gas insulated transformer is low. In addition, by passing each lead wire inside the cylindrical tank, the length of the lead wire duct accommodating each lead wire can be shortened, so that the overall plane dimension hardly increases. Therefore, in the event that the gas-insulated transformer is simple and miniaturized and used in an underground substation, the construction cost will be greatly reduced.
[0013]
3 and 4 show another embodiment of the present invention. The schematic configuration of the embodiment shown in the figure is substantially the same as that of the above-described embodiment, and therefore detailed description is omitted.
[0014]
In the present embodiment, the on-load tap changer 4 is arranged on a part of the side between the cylindrical tanks 3 in parallel with the arrangement direction of the cylindrical tanks 3. A tap lead wire 13 described later is stored between the load tap changer 4 and the cylindrical tank 3 and between the cylindrical tank 3.
[0015]
A primary lead wire 12 is connected to each winding 2, and each of the primary lead wires 12 is drawn out from the center of the side surface of each cylindrical tank 3. Each winding 2 and the load tap changer 4 are connected by a tap lead wire 13. The tap lead wire 13 is drawn out of each winding 2 from the side surface of each cylindrical tank 3, while the load tap changer 4 is connected. The tap lead 13 drawn out from the side surface of the cylindrical tank 3 adjacent to the tap 4 is directly connected to the on-load tap changer 4 via the tap lead wire duct 15, and otherwise, that is, the on-load tap changer. The tap lead wire 13 drawn out from the side surface of the cylindrical tank 3 remote from 4 passes through the tap lead wire duct 15 and crosses the inside of the adjacent cylindrical tank 3 and is connected to the load tap changer 4. .
[0016]
With such a configuration of the present embodiment, the same effects as those of the above-described embodiment can be obtained.
[0017]
【The invention's effect】
According to the gas insulated stationary induction device of the present invention described above, there is an effect that the construction cost can be significantly reduced even when the entire device is simple and small and employed in an underground substation. .
[Brief description of the drawings]
FIG. 1 is a plan view showing a gas-insulated transformer, which is one embodiment of the gas-insulated stationary induction device of the present invention.
FIG. 2 is a front view of FIG.
FIG. 3 is a plan view showing another embodiment of the gas insulated stationary induction device of the present invention.
FIG. 4 is a front view of FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Iron core, 2 ... Winding, 3 ... Cylindrical tank, 4 ... Tap changer under load, 5 ... Duct for lead wire, 6 ... Tertiary cable head, 7 ... Secondary cable head, 8 Secondary neutral point cable Head, 9 tertiary lead, 10 secondary lead, 11 secondary neutral lead, 12 primary lead, 13 tap lead, 14 cooler, 15 duct for lead lead, 16 ... Primary lead wire duct.

Claims (9)

One unit has a single-phase configuration, and a unit in which an insulating gas is filled for each unit is configured to house at least the contents of a winding and an iron core, and a plurality of these units are installed. In a gas-insulated stationary induction device comprising a tap changer connected to each winding via a tap lead,
The plurality of tanks and the tap changer are arranged in the same direction, and the tap lead wire is drawn out from a side surface of the tank, and the drawn tap lead wire is placed in a duct between the tank and the tank. A gas-insulated stationary induction device, characterized in that it is connected to the tap changer through the inside. One unit has a single-phase configuration, and a unit in which an insulating gas is filled for each unit contains at least the contents of a winding and an iron core, and a plurality of these are installed. In a gas-insulated stationary induction device, each of which has a primary lead connected,
The plurality of tanks are arranged in a substantially straight line, and each of the primary leads is pulled out from the center of the side surface of the tank, and these drawn primary leads are placed in the installation direction of the plurality of tanks. A gas-insulated stationary induction device, which is housed in a common primary lead duct arranged substantially in parallel. One unit has a single-phase configuration, and a unit in which an insulating gas is filled for each unit is configured to house at least the contents of a winding and an iron core, and a plurality of these units are installed. In a gas-insulated stationary induction device comprising a tap changer connected to each winding via a tap lead,
The plurality of tanks and the tap changer are arranged at predetermined intervals in the same direction, and connected between adjacent tanks, and between the tank and the tap changer by a tap lead wire duct arranged between the tanks and the tap changer. A gas-insulated stationary induction device characterized by the following: A tap lead wire connecting each winding of each unit and the tap changer is drawn out from a side surface of the tank, and the drawn tap lead wire passes through the tap lead wire duct and the tank. 4. The gas insulated stationary induction device according to claim 3, wherein the device is connected to the tap changer. One unit has a single-phase configuration, and a unit in which an insulating gas is filled for each unit is configured to house at least the contents of a winding and an iron core, and a plurality of these units are installed. In a gas-insulated stationary induction device comprising a tap changer connected to each winding via a tap lead,
The plurality of tanks and the tap changer are arranged at predetermined intervals in the same direction, and connected between adjacent tanks, and between the tank and the tap changer by a tap lead wire duct arranged between the tanks and the tap changer. Gas-insulated stationary induction, wherein adjacent tanks on the opposite side to the side on which the tap lead wire duct is arranged are connected by a lead wire duct arranged between the tanks. Electrical appliances. One unit has a single-phase configuration, and a unit in which an insulating gas is sealed for each unit is configured to house at least the contents of a winding and an iron core, and a plurality of these units are installed. In a gas-insulated stationary induction device including a cooler for cooling and a plurality of cable heads for drawing out lead wires from each winding as external terminals,
A gas-insulated stationary induction device, wherein the plurality of tanks are arranged in a substantially straight line, the coolers are provided for each of the tanks, and the coolers and the cable heads are alternately arranged. One unit has a single-phase configuration, and a unit in which an insulating gas is filled for each unit is configured to house at least the contents of a winding and an iron core, and a plurality of these units are installed. In a gas-insulated stationary induction device comprising a tap changer connected to each winding via a tap lead,
A plurality of tanks arranged vertically and arranged substantially in a straight line, and the tap changer is arranged on a part of a side portion between the tanks. Induction machine. One unit has a single-phase configuration, and a unit in which an insulating gas is filled for each unit is configured to house at least the contents of a winding and an iron core, and a plurality of these units are installed. In a gas-insulated stationary induction device comprising a tap changer connected to each winding via a tap lead,
While installing the plurality of tanks vertically, arranging them in a substantially straight line, and connecting the tanks, a duct for tap lead wire for storing the tap lead wire is disposed on the side of the tank. A gas insulated stationary induction device, wherein the tap changer is disposed in a part. The tap lead wire is drawn out from the side surface of the tank, and the tap lead wire drawn from the tank adjacent to the tap changer is directly connected to the tap changer, and separated from the tap changer. 9. The gas insulated stationary induction device according to claim 8, wherein a tap lead wire drawn from the tank is passed through the tap lead wire duct and the tank and connected to the tap changer.

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