JPH033211A - Electrical equipment with cooler - Google Patents

Abstract

PURPOSE:To reduce cooling area of a cooler needed for cooling an insulating gas and achieve a compact design by connecting an insulating inner container which is installed within a tank of the main unit of an equipment and a liquid cooler which is installed outside the tank at a pipe path for circulating an insulating liquid and by constituting one part of a circulating pipe path of that insulating liquid as an indirect heat exchanger of a gas cooling body which is filled into the tank of the main unit of the equipment. CONSTITUTION:A core 3 and a winding 4 generate heat while using an electrical equipment and an insulating liquid within an insulating inner container 2 and an insulating gas within a tank 1 are heated. The insulating liquid thus heated circulates within an insulating liquid circulation pipe path 7 and is cooled by a liquid cooler 5. At the same time, the cooled insulating liquid is circulated within an insulating gas cooling part 8 consisting of a branch pipe path 9, a cooling panel 10, and a branch pipe path 11, thus cooling the insulating gas at a high-temperature part which is located at the upper part within the tank 1. With this system, since the cooling panel 10 cooling the insulating gas within the tank 1 is a heat exchanger of liquid and gas, cooling efficiency of internal insulating gas can be improved as compared with the conventional heat exchange system with gas.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application This invention relates to electrical equipment in which internal equipment is cooled by a semi-pool type cooler.

B0 Summary of the Invention The present invention is an electrical device in which internal devices are cooled by a semi-pool type cooler. By doing so, the insulating liquid and the insulating gas are cooled by one liquid cooler.

C6 Conventional technology Recently, electric equipment with coolers such as power receiving and substation equipment that should be installed in densely populated urban areas has become more reliable, more compact, and more compact.
Efforts are being made to increase capacity and improve disaster prevention performance.

Conventionally, such electric equipment with a cooler includes a semi-Boolean electromagnetic induction device for substation equipment, as shown in FIGS. 3 and 4, for example. In this semi-pool type electromagnetic induction device, the winding of the device or the winding and the iron core are housed in an insulating inner container and partially immersed in an insulating liquid.

The electrical equipment illustrated in FIG. 3 is a tank 1 which is a closed container.
The insulating inner container 2 is placed inside. Inside this insulating inner container 2, an iron core 3 and a winding 4 are installed.

Then, the insulating inner container 2 is filled with an insulating liquid, and the space between the tank 1 and the insulating inner container 2 is filled with an insulating gas for insulation.

Furthermore, since heat is generated during use of the electrical equipment, a liquid cooler 5 for cooling an insulating liquid is installed in the insulating inner container 2 in order to cool the heat.

In addition, a gas cooler 6 was installed to limit the temperature of the insulating gas in the tank 1 to below a certain temperature.

Further, in the electrical equipment illustrated in FIG. 4, an iron core 3 and a winding 4 are installed in a tank 1, and the winding 4 portions are each housed in an insulating inner container 2.

The insulating inner container 2 is filled with an insulating liquid, and the tank 1 is filled with an insulating gas for insulation.

Then, the insulating liquid in the insulating inner container 2 is cooled by the liquid cooler 5, and an insulating liquid circulation pipe 7, which is a pipe passing through the iron core 3 so as to be coolable, is connected to the liquid cooler 5. Cool while circulating the insulating liquid.

Further, a gas cooler 6 was installed in the tank 1, and was configured to cool the insulating gas inside.

D0 Problems to be Solved by the Invention In the conventional electrical equipment configured as described above, there was a problem in that the liquid cooler and the gas cooler had to be installed separately, which increased the cost of the cooler.

Further, since the gas cooler used in this manner requires auxiliary equipment such as a gas feed blower, there is a problem in that auxiliary equipment loss is large and the related capacity of the station transformer increases.

Furthermore, since the heat conversion efficiency of the gas cooler is lower than that of the liquid cooler, there is a problem in that it is difficult to downsize the entire device equipped with the gas cooler.

In view of the above-mentioned points, an object of the present invention is to provide a new electric device with a cooler that has good overall cooling efficiency, is inexpensive, and can be downsized.

80 Means for Solving Problems The electric device with a cooler of the present invention circulates an insulating liquid between an insulating inner container and a gas cooling body installed in a tank of the device body to a liquid cooler installed outside the tank. It is characterized by being connected and communicated through a conduit.

F1 effect By configuring as described above, the internal equipment is directly cooled by the insulating liquid cooled by the liquid cooler, and the insulating gas in the tank is cooled via the gas cooling body, so that the equipment can be cooled only by the liquid cooler. It has the effect of cooling the entire body.

G. Example Hereinafter, an example of the electric device with a cooler of the present invention will be explained with reference to FIGS. 1 and 2. Note that in FIGS. 1 and 2, parts corresponding to the conventional example shown in FIGS. 3 and 4 described above are given the same reference numerals for convenience of explanation.

FIG. 1 is an overall schematic explanatory diagram showing a first embodiment of the present invention, where l is a tank of a semi-Boul type electromagnetic induction device, and 2 is an insulating inner container. In this insulating inner container 2, an iron core 3 and a winding 4 are housed and installed in a sealed state.

Then, the insulating inner container 2 is filled with an insulating liquid. Further, the space between the tank 1 and the insulating inner container 2 is filled with an insulating gas.

Further, a liquid cooler 5 is installed outside the tank 1.

Furthermore, an insulating liquid circulation pipe 7 connects and communicates the upper part of the insulating inner container 2 with the upper part of the liquid cooler 5 in the diagram, and connects and communicates the lower part with the lower part of the liquid cooler 5 in the diagram of the insulating inner container 2. Set up.

An insulating gas cooling section 8 is installed in the insulating inner container 2 .

This insulating gas cooling section 8 is constructed as follows.

First, the branch pipe line 9 for insulating liquid circulation is pulled out from the upper part of the insulating inner container 2. The free end of this branch pipe 9 is connected and communicated with the upper end of a cooling panel 10, which is a gas cooling body and is vertically arranged at a high part of the insulating gas filling space of the tank 1.

One end of the branch pipe 11 is connected and communicated with the lower end of the cooling panel IO, and the other end of the branch pipe 11 is connected and communicated with the lower end of the insulating inner container 2.

Next, the operation of this example device configured as described above will be explained.

First, while using electrical equipment, the iron core 3 and winding 4 generate heat,
The insulating liquid in the insulating inner container 2 and the insulating gas in the tank 1 are heated.

The thus heated insulating liquid circulates within the insulating liquid circulation pipe 7 and is cooled by the liquid cooler 5.

At the same time, the cooled insulating liquid is circulated within the insulating gas cooling section 8 consisting of the branch pipe line 9, the cooling panel 10, and the branch pipe line 11, and efficiently cools the insulating gas in the high-mass section at the upper part of the tank 1. (Cooling.In addition, in this method, the cooling panel 10 that cools the insulating gas in the tank 1 becomes a heat exchanger between liquid and gas, so compared to the conventional heat exchange method between gas and gas, The cooling efficiency of internal insulating gas can be improved.

Furthermore, although a cooling panel was used as the gas cooling body in this example, the present invention is not limited to this, and a plate-shaped panel system,
Of course, a fin-tube method, a tube-tube method, etc. may also be used.

Next, a second embodiment of the present invention will be described with reference to FIG.

In this example, the structure of the insulating gas cooling section is improved in correspondence with the structure shown in FIG. 4 described above. That is, the iron core 3 and the winding 4 are installed inside the tank 1.

Further, only the winding 4 is housed in the insulating inner container 2.

An insulating liquid circulation pipe 7 is provided between the cold body cooler 5 installed outside the tank 1 and the insulating inner container 2, and an insulating liquid circulation pipe 7 is provided which is a pipe passing through the iron core 3 so as to cool it. The liquid circulation pipe 7 is connected and communicated with the liquid cooler 5. Further, a branch pipe 12 is connected and connected to bridge the upper and lower parts of the insulating liquid circulation pipe 7, and a gas cooling panel 10, which is a gas cooling body, is arranged in the upper part of the branch pipe 12. .

Note that this gas cooling panel 10 may be of a plate-like panel type, a fin tube type, a tube type, or the like.

In the device of this example configured as described above, the insulating inner container 2,
The insulating liquid in the insulating liquid circulation pipe 7, the branch pipe 12, and the cooling panel IO is circulated so as to flow through the liquid cooler 5.

Thereby, the iron core 3 and the winding 4 are cooled, and the insulating gas in the tank 1 is efficiently cooled by exchanging heat between the liquid and the gas in the cooling panel 10.

Note that configurations other than those described above in the second embodiment,
Since the operation and effect are the same as those of the first embodiment described above, the explanation thereof will be omitted.

H2 Effects of the Invention As detailed above, according to the electric device with a cooler of the present invention, the insulating inner container and gas cooling body installed in the tank of the device body are connected to the liquid cooler installed outside the tank. By connecting and communicating through pipes that circulate liquid, the internal equipment is directly cooled with the insulating liquid cooled by the liquid cooler, and the insulating gas in the tank is cooled via the gas cooling body, making it possible to cool only the liquid cooler. This has the effect of cooling the entire device.

Therefore, there is no need for an auxiliary device for cooling the insulating gas in the tank in the main body of the device, and loss of auxiliary equipment can be reduced.
It also has the effect of being easy and economical to maintain.

In addition, since the insulating gas in the tank is cooled by heat exchange with a liquid called insulating liquid, the cooling area of the cooler required to cool the insulating gas is reduced, allowing efficient and good cooling. This has the effect of being able to be made more compact as a whole.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic configuration diagram showing a first embodiment of an electrical equipment with a cooler of the present invention, FIG. 2 is an overall schematic configuration diagram showing the second embodiment, and FIGS. 3 and 4 are FIG. 3 is an overall schematic configuration diagram showing different conventional examples. l...tank, 2...insulating inner container, 5...liquid cooler, 7...insulating liquid circulation pipe, 10...cooling panel. Figure 1 Schematic overall configuration i Figure 2 Schematic overall configuration Line 2 people not included in the diagram

Claims (1)

[Claims] (1) An insulating inner container that houses internal equipment and a gas cooling body are installed in a tank filled with insulating gas in the main body of the equipment, and a communication pipe is connected to the insulating liquid in the insulating inner container and the gas cooling body. An electrical device with a cooler, characterized in that a liquid cooler is installed outside the tank to cool the liquid by circulating it through a channel.