JPH08236359A - Gas-insulated stationary electric equipment - Google Patents

Abstract

PURPOSE: To provide a gas-insulated stationary electrical equipment which is high in cooling efficiency, uniform in temperature distribution, low in cost, and simple in structure. CONSTITUTION: A gas-insulated stationary electrical equipment is equipped with an iron core 13, coils 3 which are wound on the iron core 13 and piled up between an upper fastening plate and a lower fastening plate through the intermediary of a horizontal gas path 4 for the formation of a winding, and a tank 11 filled up with insulating gas, and a gas partitioning plate is provided between one of the fastening plates and the inner wall of the tank 11, so that cool gas is made to flow forcibly through the horizontal gas paths 4 to efficiently cool down all the winding. Therefore, all the winding is capable of being kept uniform in temperature distribution and restrained from rising locally in temperature, and the tank 1 which is filled with insulating gas and houses the coil 3 and the iron core 13 is capable of being simplified in structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to SF ₆ for cooling a winding.
The present invention relates to a gas-insulated static electric device such as a transformer and a reactor using a fluid such as gas or oil as a refrigerant.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a winding structure of a conventional gas-insulated static electric device such as a transformer and a reactor. As shown in the figure, a coil 3 is stacked between an upper tightening plate 1 and a lower tightening plate 2 via a horizontal gas passage 4, and an inner insulating cylinder 5 and an outer insulating cylinder 6 are arranged inside and outside the coil 3, respectively. An inner vertical gas passage 7 and an outer vertical gas passage 8 are provided between 3 and the insulating cylinders 5 and 6. The gas cooled by the external cooler 9 is sent into the tank 11 by the gas blower 10, and flows into the coil 3 and the iron core 13 by the gas horizontal partition plate 12 provided between the outer insulating cylinder 6 and the tank 11 to make the coil. 3 and the iron core 13 are configured to be cooled.

[0003]

By the way, in the winding structure of the conventional gas-insulated static electric equipment shown in FIG. 7, the gas flows as shown by the arrows, so that the coil 3 and the iron core 1 are
The structure of the gas intake to 3 becomes complicated and the pressure loss becomes large. Usually, the gas flow velocity is inversely proportional to the square of the pressure loss, so the gas flow velocity becomes slow, and the temperature rise of the coil is inversely proportional to the gas flow velocity at the 0.8th power, so that the cooling performance deteriorates. Further, the temperature of the gas becomes higher as the heat generated from the coil accumulates and goes up, so that there is a problem that the cooling performance is deteriorated in the upper winding.

The present invention has been made to solve the above problems, and an object thereof is to provide a gas-insulated static electric device such as a transformer and a reactor having high cooling efficiency and more uniform temperature distribution. . Still another object is to provide a gas-insulated static electric device such as a transformer and a reactor, which has a simplified structure to reduce costs and improve reliability.

[0005]

In order to achieve the above object, the present invention has an iron core and a plurality of coils wound around the iron core, which are stacked between upper and lower clamping plates via horizontal gas passages. In a gas-insulated static electric device including a winding and a tank containing an insulating gas, a gas partition plate is provided between one of the upper and lower tightening plates and the tank inner wall,
The insulating gas is configured to flow into the winding through the horizontal gas passage.

[0006]

[Function] By providing a gas partition plate between the tightening plate and the tank, the cold gas taken in from the inner diameter side or the outer diameter side of the winding is forced to pass through the horizontal gas passage to efficiently cool the entire winding. be able to. Therefore, the temperature distribution of the entire winding can be made uniform, and a local temperature rise point can be eliminated. In addition, the structure for taking gas into the coil and the iron core can be simplified.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of the first embodiment of the present invention. In addition,
The same parts as those of the conventional example shown in FIG.

As shown in the figure, in the winding for static electric equipment, a plurality of coils 3 are stacked between an upper tightening plate 1 and a lower tightening plate 2 via horizontal gas passages 4, respectively. Further, a gas horizontal partition plate 12A is provided between the upper tightening plate 1 and the tank 11, and the gas cooled by the external cooler 9 is sent into the tank 11 by the gas blower 10 and the horizontal gas from the winding outer diameter side. It has a winding structure that forces gas to flow into the passage 4.

According to this embodiment, since the insulating cylinders arranged inside and outside the coil as in the prior art are removed, the cooling gas can efficiently cool the entire winding. This eliminates the local temperature rise point of the winding and allows the entire winding to be cooled efficiently, so that the temperature distribution of the entire winding is uniform and the structure for introducing gas into the coil and iron core is also simplified. can do.

FIG. 2 is a block diagram of a second embodiment of the present invention. The same parts as those of the embodiment of FIG. As shown in the figure, in the winding for static electric equipment, a plurality of coils 3 are stacked between an upper tightening plate 1 and a lower tightening plate 2 via horizontal gas passages 4, respectively. Further, a gas horizontal partition plate 12B is provided between the lower tightening plate 2 and the tank 11, and the gas cooled by the external cooler 9 is sent into the tank 11 by the gas blower 10 and the horizontal gas from the winding outer diameter side. It has a winding structure that forces gas to flow into the passage 4.

According to this embodiment, since the insulating cylinders arranged inside and outside the coil as in the prior art are removed, the cooling gas can efficiently cool the entire winding. This eliminates the local temperature rise point of the winding and allows the entire winding to be cooled efficiently, so that the temperature distribution of the entire winding is uniform and the structure for introducing gas into the coil and iron core is also simplified. can do.

FIG. 3 is a plan view of a third embodiment of the present invention, and FIG.
3 is a sectional view of FIG. 3, and the same parts as those of the embodiment of FIG. As shown in the figure, in the winding for static electric equipment, a plurality of coils 3 are stacked between an upper tightening plate 1 and a lower tightening plate 2 via horizontal gas passages 4, respectively. A gas vertical partition plate 14 is provided in the height direction of the winding, and the gas cooled by the external cooler 9 is sent into the tank 11 by the gas blower 10 and wound from the outer surface of the winding through the horizontal gas passage 4. It has a structure that flows into the inside of the line and allows gas to flow out from the side of the tank on the opposite side.

According to this embodiment, since the insulating cylinders arranged inside and outside the coil as in the prior art are removed, the cooling gas can efficiently cool the entire winding. This eliminates the local temperature rise point of the winding and allows the entire winding to be cooled efficiently, so that the temperature distribution of the entire winding is uniform and the structure for introducing gas into the coil and iron core is also simplified. can do.

FIG. 5 is a sectional view of a fourth embodiment of the present invention, and FIG. 6 is a plan view of a tightening plate under the winding of FIG. Note that the same parts as those of the conventional example shown in FIG.

As shown in the figure, in the winding for static electric equipment, a plurality of coils 3 are stacked between an upper tightening plate 1 and a lower tightening plate 15 via horizontal gas passages 4, respectively. An inner insulating cylinder 5 and an outer insulating cylinder 6 are arranged inside and outside the coil 3, and an inner vertical gas passage 7 and an outer vertical gas passage 8 are provided between the coil 3 and the insulating cylinders 5 and 6. A gas horizontal partition plate 12C is provided between 6 and the tank 11. Further, the lower tightening plate 15 has a honeycomb structure as shown in FIG.

According to the present embodiment, the gas cooled by the external cooler 9 is sent into the tank 11 by the gas blower 10 and wound by the gas horizontal partition plate 12C provided between the outer insulating cylinder 6 and the tank 11. The structure is such that it flows into the lower portion, passes through the tightening plate 15 having a honeycomb structure, and flows into the coil 3 and the iron core 13. Thereby, the tightening plate 15 can be significantly reduced in weight. Further, since the structure for taking in gas to the coil and the iron core can be simplified, the pressure loss of the coil can be reduced.

[0017]

As described above, according to the present invention,
The efficiency of cooling the heat generated in the winding can be improved, and the temperature distribution in the winding can be made uniform. This makes it possible to extend the life of the insulating material used as a constituent member of the winding as compared with the conventional one, and to provide highly reliable gas-insulated static electric equipment such as a transformer and a reactor. . In addition, an inexpensive insulating material can be applied as a constituent member, and the cost can be reduced. Furthermore, in addition to improving the cooling performance, the structure can be simplified, so that it is possible to provide a gas-insulated static electric device such as a transformer and a reactor that are more compact than in the past, and a significant cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a second embodiment of the present invention.

FIG. 3 is a plan view of a third embodiment of the present invention.

FIG. 4 is a configuration diagram of FIG. 3.

FIG. 5 is a configuration diagram of a fourth embodiment of the present invention.

FIG. 6 is a plan view of the honeycomb structure tightening plate of FIG.

FIG. 7 is a configuration diagram of a conventional gas-insulated static electric device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper clamping plate, 2 ... Lower clamping plate, 3 ... Coil, 4 ... Horizontal gas passage, 5 ... Inner insulating cylinder, 6 ... Outer insulating cylinder, 7 ... Inner vertical gas passage, 8 ... Outer vertical gas passage, 9 ... External cooler, 10 ... Gas blower, 11 ... Tank, 12, 1
2A, 12B, 12C ... Gas horizontal partition plate, 13 ... Iron core,
14 ... Gas vertical partition plate, 15 ... Honeycomb structure fastening plate.

Claims (1)

[Claims] 1. An iron core, a winding in which a plurality of coils wound around the iron core are stacked between upper and lower clamping plates via horizontal gas passages, and a tank containing an insulating gas. In a gas-insulated static electric device, a gas partition plate is provided between one of the upper and lower tightening plates and the inner wall of the tank,
A gas-insulated static electric device, wherein the insulating gas is configured to flow into the winding through the horizontal gas passage.