JPS5827645B2 - stationary induction equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a stationary induction device which is a large-capacity stationary induction device combined with a gas-insulated switchgear and whose cooler is air-cooled.

Gas insulated switchgear that uses sulfur hexafluoride SF6 gas for insulation purposes is widely used to reduce the installation area of substations, and is installed in transformers with wall bushings (SF6).
Direct connection via 6 gas-transformer oil) is widely applied.

When a gas insulated switchgear is directly combined with a transformer, there is a drawback that the gas insulated switchgear is heated by the hot air discharged from the transformer cooler.

However, since conventional products were mainly medium-capacity transformers with a transformer capacity of about 100 MVA, the loss generated by the gas-insulated switchgear itself was small, and there was sufficient margin for temperature rise. There was no need to consider the influence of warm air from the cooler.

However, in recent years, the capacity of transformers has become extremely large, and the current capacity of gas-insulated switchgears that are combined with them has also become large.

For this reason, the generated loss also increases, and the temperature rise of the gas insulated switchgear itself has become a problem.

Especially when used in combination with a transformer, considering that the gas insulated switchgear is heated by the hot air discharged from the transformer cooler, the conductor portion is It was necessary to use a device with a larger cross-sectional area to reduce the generated loss.

This has resulted in drawbacks such as an increase in the weight and price of the gas insulated switchgear.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stationary induction device that prevents hot air discharged from a cooler from affecting a gas insulated switchgear and prevents the hot air from heating the gas insulated switchgear. Yes, when installing multiple coolers with cooling fans on the longitudinal sides of the tank of stationary induction equipment, and installing gas-insulated switchgears between these coolers to divide the coolers into two groups, each The air intake of the cooling fan of the group cooler is installed on the gas insulated switchgear side.

An embodiment of the stationary guidance device of the present invention will be described below with reference to FIGS. 1 and 2.

On the medium pressure side of the tank 1, which has a conservator 2, a medium pressure bushing 3, a high pressure bushing 5, and a low pressure bushing 8 attached to the top surface, a gas insulated switchgear 6 and a disconnector (not shown),
A gas insulated lightning arrester 7 having a grounding switch is combined.

4 is a wall bushing.

On the longitudinal side of the tank 1, there is a gas insulated switchgear 6 and a plurality of coolers 9 on both sides divided into two groups.
has been set up.

A cooling fan 10 is attached to the cooler 9 so that the gas insulated switchgear 6 side serves as an air intake so that the warm air heated by heat exchange does not hit the gas insulated switchgear 6.

By doing this, the gas insulated switchgear 6 is located on the suction side of the low-temperature air of the cooling fan 10 of the cooler 9 of each group, so it is not only not affected by hot air, but also is not affected by the suction air. It has the advantage of being forcedly cooled by the flow.

In addition, in the embodiment of the present invention, in addition to the cooling fan 10 provided on the side of the gas insulated switchgear 6, the cooler 9 of each group includes a cooler 9.
A cooling fan 11 is provided that blows air from below to above.

Therefore, in the cooler 9 portion, as shown by arrows in FIG. 2, the collision of the air flows caused by the cooling fans 10 and 11 creates turbulence, which improves the cooling effect of the cooler 9.

For coolers, it is known that if the air flowing around the cooler is turbulent rather than laminar, there will be no temperature difference at the interface and the cooling effect will be more uniform.

By placing the cooling fan on the gas insulated switchgear side and below to cool the cooler, the cooler can be efficiently cooled without affecting the gas insulated switchgear due to the hot air from the cooler. can do.

Further, when it is necessary to reduce the number of cooling fans to be operated due to noise or the like, only the cooling fan on the gas insulated switchgear side can be driven to prevent heating of the gas insulated switchgear.

As described above, the stationary induction equipment of the present invention can prevent the hot air discharged from the cooler from affecting the gas insulated switchgear and prevent the gas insulated switchgear from being heated by the hot air. This has the effect that the weight of the device can be reduced and it can be manufactured economically.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing an embodiment of the stationary guidance device of the present invention, and FIG. 2 is a front view of FIG. 1. 1... Tank, 6... Gas insulated switchgear, 9... Cooler, 10, 11... Cooling fan.

Claims (1)

[Claims] 1. A plurality of coolers each having a cooling fan are installed on the longitudinal side of a tank of a stationary induction device, and a gas insulated switchgear is installed in parallel between the coolers to form two groups of coolers. A stationary induction device characterized in that the cooling fans of each group of coolers located on both sides of the gas insulated switchgear are installed so that the gas insulated switchgear side serves as an air intake port. 2. The stationary induction device according to claim 1, wherein each group of coolers is provided with a cooling fan that blows air from the side and a cooling fan that blows air from below to above.