JPH09120916A - Gas-cooled stationary induction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost induction machine that can be efficiently cooled. SOLUTION: An induction machine comprises a tank 3 housing a stationary inductor 1 and cooling gas 2, external heat exchanger 5 for cooling the cooling gas 2 heated by the heat of the stationary inductor, and a gas blower 6 for forcing the cooling gas to circulate between the tank 3 and the heat exchanger 5. The tank, the heat exchanger and the blower are connected through piping 4. Above the tank, a sprinkler 7 is provided so that water sprinkled over the tank may be evaporated, and thus the stationary inductor is somewhat cooled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static induction electric device such as a transformer and a reactor, and more particularly, to a cooling gas between a main body of the static induction electric device and a tank containing the cooling gas and an external heat exchanger. The present invention relates to a gas-cooled static induction electric device capable of efficiently cooling heat generated from the main body of the static induction electric device by forced circulation.

[0002]

2. Description of the Related Art In recent years, due to an increase in power demand in large cities, substations have been installed underground in urban areas, and static induction electrical equipment featuring nonflammability and explosion proof has been installed.
There are more and more strongly desired cases.

Another example of application of such static induction electric equipment is a power receiving facility of a building such as a hospital, airport, hotel, department store, etc. where an unspecified number of people enter and leave. Here, in the case of a comparatively small capacity, dry static induction electric equipment of class H insulation is used. When the capacity is several MVA to several tens MVA, a gas-insulated / gas-cooled stationary induction electric device using SF ₆ gas or the like as a cooling medium is used. Further, when the capacity becomes large and reaches several hundreds MVA class, in order to improve the cooling performance, a gas-insulated / liquid-cooled static induction electric device using perfluorocarbon liquid or the like as a cooling medium is used.

On the other hand, recently, even for a capacity of several hundreds MVA class, a gas cooling type static induction electric device which insulates and cools only with gas without using liquid has been developed and commercialized. And since this type of gas-cooled static induction electrical equipment does not use liquid, it simplifies the structure and makes it compact.
Benefits such as simplification of maintenance and inspection are obtained, and cost reduction is expected. Therefore, there is a growing need to apply even higher capacity.

FIG. 4 is a schematic diagram showing an example of the configuration of a conventional gas-cooled static induction electric device of this type. In FIG.
The gas-cooled stationary induction electric device is provided with a tank 3 in which a stationary induction electric device body (winding, iron core, etc.) 1 and a cooling gas 2 are stored, and a tank 3 provided outside the tank 3. An external heat exchanger (for example, a water-cooled cooler) that cools the cooling gas 2 that has been warmed by the generated heat
5 and a gas blower 6 for forcibly circulating the cooling gas 2 between the tank 3 and the external heat exchanger 5 are connected to each other by a gas pipe 4. The gas blower 6 is
It may be installed on the external heat exchanger 5.

In such a gas-cooled static induction electric apparatus, the cooling gas 2 whose temperature has risen in the tank 3 accommodating the main body 1 of the static induction electric apparatus and the cooling gas 2 is supplied to the gas pipe 4
To the external heat exchanger 5. The cooling gas 2 that has flowed into the external heat exchanger 5 is cooled when passing through the external heat exchanger 5, and the cooling gas 2 having a lowered temperature is cooled by the gas blower 6
Is again sent to the tank 3. Here, as the gas blower 6, it is general to use a gas blower in which the inlet and outlet of the cooling gas 2 flow at right angles.

Due to the circulation of the cooling gas 2 as described above, the heat generated from the stationary induction electric device body 1 in the tank 3 is
The stationary induction electric device body 1 is cooled by being transmitted to the external heat exchanger 5 via the cooling gas 2 which is a cooling medium and discharged to the outside.

However, such a gas-cooled stationary induction electric device has the following problems. That is, when the capacity of the gas-cooled static induction electric device is increased, the size of the device is increased and the loss generated from the static induction electric device main body (winding, iron core, etc.) 1 increases. for that reason,
It is necessary to increase the capacity of the external heat exchanger 5 and the gas blower 6 or increase the number of units to improve the cooling efficiency.

As a result, the external heat exchanger 5 and the gas blower 6
The cost required for Further, the space occupied by the external heat exchanger 5 and the gas blower 6 becomes large, and the construction cost of the substation becomes high accordingly.

[0010]

As described above, in the conventional gas-cooled static induction electric equipment, there is a problem that the cost becomes high when the cooling performance is improved. An object of the present invention is to provide a gas-cooled stationary induction electric device that is low in cost and excellent in cooling performance.

[0011]

In order to achieve the above object, first of all, in the invention corresponding to claim 1, a stationary induction electric device body and a tank in which a cooling gas is housed,
An external heat exchanger provided outside the tank for cooling the cooling gas heated by the heat generated from the main body of the static induction electric device, and a gas blower for forcedly circulating the cooling gas between the tank and the external heat exchanger. In a gas-cooled static induction electric device configured by connecting each other with a gas pipe, a sprinkler for sprinkling water is provided on the upper part of the tank, and the water sprayed by the sprinkler causes the water to adhere to the tank. The latent heat of vaporization from the surface of the tank is used to partially cool the heat generated from the main body of the stationary induction electric device.

Further, in the invention according to claim 2, a static induction electric device main body and a tank containing a cooling gas therein, and a tank provided outside the tank and heated by heat generated from the static induction electric device main body. In a gas-cooled static induction electrical device configured by connecting an external heat exchanger for cooling the cooling gas and a gas blower for forcedly circulating the cooling gas between the tank and the external heat exchanger by gas pipes. , A heat pipe cooler connected to the cooling fins by a copper pipe filled with a refrigerant is installed in the upper part of the tank, and the heat pipe cooler partially cools the heat generated from the main body of the stationary induction electric device. I have to.

Further, in the invention corresponding to claim 3, a stationary induction electric device body and a tank containing a cooling gas therein, and a tank provided outside the tank, are heated by heat generated from the stationary induction electric device body. A water-cooled external heat exchanger for cooling the cooling gas, and a gas blower for forcedly circulating the cooling gas between the tank and the water-cooled external heat exchanger,
In a gas-cooled static induction electric device configured by connecting each other with a gas pipe, a cooling facility connected to a power storage device is installed at the inlet side of the cooling water pipe in the water-cooled external heat exchanger, and the power load The electricity is stored by the electricity storage device at low nighttime, and during the daytime when a high load is generated, the cooling equipment is operated by the electricity stored in the electricity storage device to cool the cooling water flowing through the cooling water pipe.

Therefore, first, in the gas-cooled static induction electric device of the invention according to claim 1, the latent heat of vaporization from the tank surface due to the water sprinkled from the sprinkler disposed at the upper part of the tank and adhering to the tank is first. By utilizing this to bear a part of the cooling of the heat generated from the stationary induction electric device body, it becomes possible to efficiently cool the heat generated from the stationary induction electric device body.

As a result, when increasing the capacity of the gas-cooled static induction electrical equipment, it is possible to reduce the capacity or the number of external heat exchangers and gas blowers attached to the gas-cooled static induction electrical equipment.

Further, in the gas-cooled static induction electric equipment of the invention according to claim 2, the stationary equipment is provided by the heat pipe cooler connected to the cooling fin by the copper pipe filled with the refrigerant, which is arranged at the upper part of the tank. By allowing a part of the cooling of the heat generated from the main body of the induction electric device to be performed, the heat generated from the main body of the stationary induction electric device can be efficiently cooled.

As a result, when increasing the capacity of the gas-cooled stationary induction electrical equipment, it is possible to reduce the capacity or the number of external heat exchangers and gas blowers attached to the gas-cooled stationary induction electrical equipment.

Further, a heat pipe cooler, a copper pipe,
By arranging the cooling fins in a dead space near the end plate above the tank, it is possible to reduce the occupied space required for them.

On the other hand, in the gas-cooled static induction electrical equipment of the invention according to claim 3, the cooling equipment connected to the power storage device is provided at the inlet side of the cooling water pipe of the water-cooled external heat exchanger. The electricity is stored in the electricity storage device at night when the power load is low, and during the daytime when a high load occurs, the stored electricity is used to operate the cooling equipment to cool the cooling water, thereby improving the cooling efficiency of the water-cooled external heat exchanger. It is possible to improve and efficiently cool the heat generated from the stationary induction electric device body.

As a result, when increasing the capacity of the gas-cooled static induction electrical equipment, it is possible to reduce the capacity or the number of external heat exchangers and gas blowers attached to the gas-cooled static induction electrical equipment.

Further, it is possible to make the cooling device such as a cooling tower that releases heat from the cooling water to the atmosphere compact and have a low capacity. As described above, it is possible to obtain a gas-cooled stationary induction electric device that is lower in cost and has better cooling performance.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings. (First Embodiment) FIG. 1 is a schematic view showing a configuration example of a gas-cooled static induction electric device according to the present embodiment. The same parts as those in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted. Here, only different parts will be described.

That is, as shown in FIG. 1, the gas-cooled static induction electrical equipment of this embodiment has the tank 3 shown in FIG.
A sprinkler 7 for sprinkling water is provided on the upper part of the tank, and the stationary induction is performed by utilizing latent heat of vaporization from the surface (upper outer wall) of the tank 3 by the water 8 sprinkled by the sprinkler 7 and attached to the tank 3. A part of the heat generated from the electric device body 1 is cooled.

Next, in the gas-cooled static induction electric apparatus of the present embodiment configured as described above, the tank 3 is formed by the water 8 sprinkled from the water sprinkler 7 disposed above the tank 3 and adhering to the tank 3. Utilizing latent heat of vaporization from the surface,
By sharing a part of the cooling of the heat generated from the stationary induction electric device body 1, the heat generated from the stationary induction electric device body 1 can be efficiently cooled.

As a result, when the capacity of the gas-cooled stationary induction electric equipment is increased, the capacity of the external heat exchanger 5 and the gas blower 6 attached to the gas-cooled stationary induction electric equipment can be reduced or the number of them can be reduced. , The occupying space required for them can be greatly reduced. Along with this, the construction cost of the substation can be reduced. Further, it is possible to reduce the costs required for the external heat exchanger 5 and the gas blower 6.

As described above, it is possible to obtain a gas-cooled stationary induction electric device which is low in cost and excellent in cooling performance. As described above, in the present embodiment, the tank 3 in which the stationary induction electric device body 1 and the cooling gas 2 are stored and the heat generated by the stationary induction electric device body 1 provided outside the tank 3 are warmed. An external heat exchanger 5 for cooling the cooling gas 2 and a gas blower 6 for forcedly circulating the cooling gas 2 between the tank 3 and the external heat exchanger 5 are connected to each other by a gas pipe 4. In the gas-cooled stationary induction electric device, a sprinkler 7 for sprinkling water on the upper part of the tank 3
Is provided, and the latent heat of vaporization from the surface of the tank 3 due to the water 8 sprinkled by the sprinkler 7 and adhering to the tank 3 is utilized to partially cool the heat generated from the stationary induction electric device body 1. It was done like this.

Therefore, when increasing the capacity of the gas-cooled static induction electrical equipment, it is possible to reduce the capacity or the number of the external heat exchanger 5 and the gas blower 6 attached to the gas-cooled static induction electrical equipment. The occupied space required for them can be greatly reduced. Along with this, the construction cost of the substation can be reduced.
Further, it is possible to reduce the costs required for the external heat exchanger 5 and the gas blower 6.

As a result, it is possible to obtain a gas-cooled stationary induction electric device which is low in cost and excellent in cooling performance. (Second Embodiment) FIG. 2 is a schematic diagram showing a configuration example of a gas cooling static induction electric apparatus according to the present embodiment. The same parts as those in FIG. Here, only different parts will be described.

That is, as shown in FIG. 2, the gas-cooled static induction electric device of this embodiment has the tank 3 shown in FIG.
A heat pipe cooler 11 connected to the cooling fins 10 by a copper pipe 9 filled with a refrigerant is disposed above the
The heat pipe cooler 11 partially cools the heat generated from the stationary induction electric device body 1.

Next, in the gas-cooled static induction electric apparatus of the present embodiment having the above-mentioned structure, the cooling fins 10 are connected by the copper pipe 9 filled with the refrigerant, which is arranged in the upper portion of the tank 3. By allowing the heat pipe cooler 11 to bear a part of the cooling of the heat generated from the stationary induction electric device body 1, it becomes possible to efficiently cool the heat generated from the stationary induction electric device body 1.

As a result, when the capacity of the gas-cooled stationary induction electric equipment is increased, it is possible to reduce the capacity of the external heat exchanger 5 and the gas blower 6 attached to the gas-cooled stationary induction electric equipment, or to reduce the number of them. , The occupying space required for them can be greatly reduced. Along with this, the construction cost of the substation can be reduced. Further, it is possible to reduce the costs required for the external heat exchanger 5 and the gas blower 6.

Further, by disposing the heat pipe cooler 11, the copper pipes 9 and the cooling fins 10 in a dead space near the end plate above the tank 3, it is possible to reduce the occupied space required for them.

As described above, it is possible to obtain a gas-cooled static induction electric device that is lower in cost and has a better cooling performance. As described above, in the present embodiment, the tank 3 that houses the stationary induction electric device body 1 and the cooling gas 2 inside.
Between the tank 3 and the external heat exchanger 5, and the external heat exchanger 5 provided outside the tank 3 for cooling the cooling gas 2 warmed by the heat generated from the stationary induction electric device body 1. A gas blower 6 for forcedly circulating the cooling gas 2,
In a gas-cooled static induction electric device configured to be connected to each other by a gas pipe 4, a heat pipe cooler 11 connected to a cooling fin 10 by a copper pipe 9 filled with a refrigerant is arranged above a tank 3. The heat pipe cooler 11 partially cools the heat generated from the stationary induction electric device body 1.

Therefore, when increasing the capacity of the gas-cooled static induction electrical equipment, it is possible to reduce the capacity or the number of the external heat exchanger 5 and the gas blower 6 attached to the gas-cooled static induction electrical equipment. The occupied space required for them can be greatly reduced. Along with this, the construction cost of the substation can be reduced.
Further, it is possible to reduce the costs required for the external heat exchanger 5 and the gas blower 6.

Further, by disposing the heat pipe cooler 11, the copper pipe 9, and the cooling fin 10 in a dead space near the end plate above the tank 3, it is possible to reduce the occupied space required for them.

As a result, it is possible to obtain a gas-cooled static induction electric device having a lower cost and a further excellent cooling performance. (Third Embodiment) FIG. 3 is a schematic diagram showing a configuration example of a gas-cooled static induction electric device according to the present embodiment. The same parts as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted. Here, only different parts will be described.

That is, as shown in FIG. 3, the gas-cooled static induction electric apparatus of this embodiment is provided with a water-cooled external heat exchanger 12 in place of the external heat exchanger 5 shown in FIG. Water piping 13 in the external heat exchanger 12
A cooling facility 15 connected to the power storage device 14 is disposed on the entrance side of the power storage device 14 so that the power storage device 14 stores power at night when the power load is low and the power storage device 14 stores power during the daytime when a high load occurs. The cooling equipment 15 is operated by the electric power to cool the cooling water 16 flowing through the cooling water pipe 13.

Next, in the gas-cooled static induction electric device of the present embodiment having the above-described structure, the water-cooled external heat exchanger 12 is connected to the power storage device 14 arranged on the inlet side of the cooling water pipe 13. The electricity is stored in the electricity storage device 14 at night when the power load is low, and the electricity is stored to operate the cooling equipment 15 during the daytime when a high load is generated to cool the cooling water 16 (cooling water). 16 to lower the temperature)
As a result, the cooling efficiency of the water-cooled external heat exchanger 12 can be improved, and the temperature rise of the gas warmed by the stationary induction electric device body 1 can be estimated to be high, so that the heat generated from the stationary induction electric device body 1 can be reduced. It becomes possible to cool efficiently.

As a result, when increasing the capacity of the gas-cooled stationary induction electrical equipment, it is possible to reduce the capacity of the external heat exchanger 5 and the gas blower 6 attached to the gas-cooled stationary induction electrical equipment, or to reduce the number thereof. , The occupying space required for them can be greatly reduced. Along with this, the construction cost of the substation can be reduced. Further, it is possible to reduce the costs required for the external heat exchanger 5 and the gas blower 6.

Further, it is possible to reduce the size and capacity of a cooling device such as a cooling tower that releases heat from the cooling water 16 to the atmosphere. As described above, it is possible to obtain a gas-cooled stationary induction electric device that is lower in cost and has better cooling performance.

As described above, in this embodiment, the stationary induction electric device body 1 and the cooling gas 2 are stored in the tank 3, and the stationary induction electric device body 1 is provided outside the tank 3. A water-cooled external heat exchanger 12 for cooling the cooling gas 2 heated by heat and a gas blower 6 for forcibly circulating the cooling gas 2 between the tank 3 and the water-cooled external heat exchanger 12 are connected by a gas pipe 4. In a gas-cooled static induction electric device configured to be connected to each other, a cooling facility 15 connected to a power storage device 14 is disposed on the inlet side of a cooling water pipe 13 in a water-cooled external heat exchanger 12,
At night when the power load is low, electricity is stored by the electricity storage device 14,
During the daytime when a high load is generated, the cooling equipment 15 is operated by the electricity stored in the power storage device 14 to cool the cooling water 16 flowing through the cooling water pipe 13.

Therefore, when increasing the capacity of the gas-cooled static induction electrical equipment, it is possible to reduce the capacity or the number of the external heat exchanger 5 and the gas blower 6 attached to the gas-cooled static induction electrical equipment. The occupied space required for them can be greatly reduced. Along with this, the construction cost of the substation can be reduced.
Further, it is possible to reduce the costs required for the external heat exchanger 5 and the gas blower 6.

Further, it is possible to reduce the size and capacity of a cooling device such as a cooling tower that releases heat from the cooling water 16 to the atmosphere. As described above, it is possible to obtain a gas-cooled stationary induction electric device that has a lower cost and a further improved cooling performance.

[0044]

As described above, according to the invention according to claim 1, a static induction electric device main body and a tank containing a cooling gas therein, and a static induction electric device provided outside the tank. An external heat exchanger that cools the cooling gas heated by the heat generated from the main body and a gas blower that forcedly circulates the cooling gas between the tank and the external heat exchanger are connected to each other by gas piping. In a gas-cooled stationary induction electric device, a sprinkler for sprinkling water is installed on the upper part of the tank, and the latent heat of vaporization from the surface of the tank due to the water sprinkled by the sprinkler and adhering to the tank is used Since a part of the heat generated from the main body of the induction electric device is cooled, it is possible to provide a gas-cooled stationary induction electric device having excellent cooling performance at low cost.

According to the invention corresponding to claim 2,
A tank that contains the stationary induction electric device body and cooling gas inside, and an external heat exchanger that is provided outside the tank and cools the cooling gas warmed by the heat generated from the stationary induction electric device body, and the tank. In a gas-cooled static induction electric device configured by connecting a gas blower for forcedly circulating a cooling gas with an external heat exchanger to each other with a gas pipe, a copper pipe filled with a refrigerant is provided at the upper part of the tank. A heat pipe cooler connected to the cooling fins is provided, and part of the heat generated from the stationary induction electric device body is cooled by the heat pipe cooler, so that the cooling performance is further reduced at a lower cost. An excellent gas-cooled stationary induction electric device can be provided.

Further, according to the invention corresponding to claim 3, a tank in which the main body of the static induction electric device and the cooling gas are stored, and a heat provided from the main body of the static induction electric device which is provided outside the tank. A gas configured by connecting a water-cooled external heat exchanger that cools the warmed cooling gas and a gas blower that forcibly circulates the cooling gas between the tank and the water-cooled external heat exchanger, through gas pipes. In the stationary static induction electric equipment, the cooling equipment connected to the power storage device is installed at the inlet side of the cooling water pipe in the water-cooled external heat exchanger, and at night when the power load is low, the power storage device stores electricity and During the daytime when a load is generated, the cooling equipment is operated by the electricity stored in the power storage device to cool the cooling water flowing through the cooling water pipes, so it is even more cost-effective and cooler. Excellent gas-cooled stationary induction electrical apparatus in can be provided.

[Brief description of the drawings]

FIG. 1 shows a first gas-cooled stationary induction electric device according to the present invention.
FIG.

2 a second gas-cooled stationary induction electrical device according to the invention, FIG.
FIG.

FIG. 3 is a third gas-cooled stationary induction electric device according to the present invention.
FIG.

FIG. 4 is a schematic diagram showing a configuration example of a conventional gas cooling stationary induction electric device.

[Explanation of symbols]

 1 ... Stationary induction electric equipment main body, 2 ... Cooling gas, 3 ... Tank, 4 ... Gas piping, 5 ... External heat exchanger, 6 ... Gas blower, 7 ... Sprinkler, 8 ... Moisture, 9 ... Copper pipe, 10 ... Cooling Fins, 11 ... Heat pipe cooler, 12 ... Water-cooled heat exchanger, 13 ... Cooling water piping, 14 ... Power storage device, 15 ... Cooling equipment, 16 ... Cooling water.

Claims (3)

[Claims] 1. A tank containing a main body of a stationary induction electric device and a cooling gas therein, and an external heat provided outside the tank for cooling a cooling gas warmed by heat generated from the main body of the stationary induction electric device. A gas-cooled static induction electrical device configured by interconnecting an exchanger and a gas blower for forcedly circulating a cooling gas between the tank and an external heat exchanger, in the upper part of the tank, A sprinkler for sprinkling water is provided, and the latent heat of vaporization from the tank surface by the water sprinkled by the sprinkler and attached to the tank is used to cool the heat generated from the stationary induction electric device body. A gas-cooled stationary induction electric device characterized in that a part thereof is performed. 2. A tank in which a stationary induction electric device body and a cooling gas are housed, and an external heat provided outside the tank for cooling the cooling gas warmed by the heat generated from the stationary induction electric device body. A gas-cooled static induction electrical device configured by interconnecting an exchanger and a gas blower for forcedly circulating a cooling gas between the tank and an external heat exchanger, in the upper part of the tank, A heat pipe cooler connected to a cooling fin by a copper pipe filled with a refrigerant is arranged, and the heat pipe cooler partially cools heat generated from the stationary induction electric device body. Characteristic gas-cooled stationary induction electrical equipment. 3. A tank containing a stationary induction electric device body and a cooling gas inside, and a water-cooled type which is provided outside the tank and cools the cooling gas warmed by the heat generated from the stationary induction electric device body. In a gas-cooled static induction electric device configured by connecting an external heat exchanger and a gas blower for forcedly circulating a cooling gas between the tank and the water-cooled external heat exchanger by gas pipes, On the inlet side of the cooling water pipe in the external heat exchanger, a cooling facility connected to a power storage device is provided, and at night when the power load is low, the power storage device stores electricity.
In the daytime when a high load is generated, the cooling facility is operated by the electricity stored in the power storage device to cool the cooling water flowing through the cooling water pipe.