Static induction electric appliance and method for reducing noise from static induction electric appliance

Abstract

To provide a static induction electric appliance and a method for reducing noise from a static induction electric appliance, which can reduce the noise from a static induction electric appliance such as a transformer without significantly increasing the installation area.SOLUTION: A static induction electric appliance includes a static induction electric appliance main body made up of an iron core and a winding, a main tank in which the static induction electric appliance main body is housed and which is filled with a gas or liquid insulating cooling medium, either a gas blower or a liquid pump disposed in a central region above the main tank, a radiator disposed to the side of the main tank, and piping connecting the main tank, the gas blower or the liquid pump, and the radiator.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a static induction machine and a method for reducing noise from the static induction machine. [Background technology]

[0002] The noise specifications of static induction equipment such as transformers vary depending on the installation location. In recent years, there has been a strong demand for low noise transformers, especially those installed in substations near residential areas.

[0003] Here, the gas blower and cooling fan, which are cooling devices for gas-insulated transformers, use a motor to directly circulate the medium, so they do not require a large space like a radiator and can improve cooling performance relatively inexpensively. In particular, for transformers that use naturally occurring gases with low cooling performance as the insulating cooling medium, the gas blower and cooling fan are important devices that greatly contribute to improving cooling performance.

[0004] On the other hand, these devices generate a lot of noise in proportion to the cooling capacity, and are therefore the main source of noise in gas-insulated transformers. Note that transformers that use liquids such as insulating oil as a cooling medium, including oil-filled transformers, use pumps instead of gas blowers, but the noise generated by the coolers is still high, just like in gas-insulated transformers.

[0005] To achieve low noise, it is necessary to use a cooling device that does not generate noise, such as a radiator, for cooling, or to take soundproofing measures such as using a soundproof tank to suppress noise, but this increases the installation area, which has been an issue (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-86174 Summary of the Invention [Problem to be solved by the invention]

[0007] As described above, conventionally, there has been a demand for noise reduction measures to reduce noise levels in static induction electric devices such as transformers without significantly increasing the installation area.

[0008] The present invention has been made in response to the above-mentioned conventional circumstances, and aims to provide a static induction device and a method for reducing noise from a static induction device such as a transformer, which can reduce noise without significantly increasing the installation area. [Means for solving the problem]

[0009] The static induction motor of this embodiment is characterized by comprising a static induction motor main body composed of an iron core and a winding, a main tank in which the static induction motor main body is housed and which is filled with a gas or liquid insulating cooling medium, either a gas blower or a liquid pump arranged in the central region at the top of the main tank, a radiator arranged to the side of the main tank, and piping connecting the main tank, the gas blower or the liquid pump, and the radiator.

[0010] The method for reducing noise from a static induction motor according to an embodiment is characterized in that noise is reduced by using a static induction motor comprising: a static induction motor main body composed of an iron core and windings; a main tank in which the static induction motor main body is housed and which is filled with a gas or liquid insulating cooling medium; either a gas blower or a liquid pump arranged in the central region above the main tank; a radiator arranged to the side of the main tank; and piping connecting the main tank, the gas blower or the liquid pump, and the radiator. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a static induction device and a method for reducing noise from a static induction device such as a transformer, which can reduce noise without significantly increasing the installation area. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram schematically illustrating the overall configuration of a static induction electric appliance and a noise reduction method for a static induction electric appliance according to a first embodiment. [Figure 2] 1 is a diagram schematically illustrating the overall configuration of a static induction electric appliance and a noise reduction method for a static induction electric appliance according to a first embodiment. [Figure 3] 1 is a diagram schematically illustrating the configuration of a main part of a static induction electric appliance and a method for reducing noise from a static induction electric appliance according to a first embodiment. [Figure 4] FIG. 10 is a diagram schematically illustrating the overall configuration of a static induction electric appliance and a noise reduction method for a static induction electric appliance according to a second embodiment. [Figure 5] FIG. 10 is a diagram schematically illustrating the overall configuration of a static induction electric appliance and a noise reduction method for a static induction electric appliance according to a third embodiment. [Figure 6] FIG. 10 is a diagram schematically illustrating the overall configuration of a static induction electric appliance and a noise reduction method for a static induction electric appliance according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a static induction device and a noise reduction method for a static induction device according to an embodiment will be described with reference to the drawings.

[0014] (First embodiment) 1 and 2 are diagrams showing a schematic configuration of a stationary induction electric appliance and a method for reducing noise from a stationary induction electric appliance according to a first embodiment.

[0015] Fig. 1 is a diagram showing a schematic side view of the static induction device 100 according to the first embodiment, and Fig. 2 is a diagram showing a schematic top view of the static induction device 100 according to the first embodiment. As shown in Figs. 1 and 2, the static induction device 100 includes a main tank 101 that houses a main body (not shown) of the static induction device formed of an iron core and a winding, and a radiator 102 disposed on the side of the main tank 101.

[0016] A gas blower 103 is provided at the top of the main tank 101, and a pipe 104 extending laterally from the gas blower 103 is connected to the radiator 102, and the pipe 104 is connected to the bottom of the main tank 101 at the bottom of the radiator 102.

[0017] The main tank contains the above-mentioned stationary induction motor body and is filled with an insulating cooling medium such as insulating gas. The insulating cooling medium insulates the windings of the stationary induction motor body and cools the iron core and windings that heat up when current is passed through the stationary induction motor body. This insulating cooling medium is sent by gas blower 103 through piping 104 to radiator 102, where it is cooled and then returned to main tank 101 through piping 104 from the bottom of radiator 102.

[0018] In the first embodiment, as shown in Fig. 2, the gas blower 103 is disposed so as to be located approximately in the center of the upper part of the main tank 101. This allows the noise generated by the gas blower 103 to be diffused evenly around the stationary induction device 100 without being biased in one direction, thereby reducing the overall noise.

[0019] In other words, the noise of the stationary induction electric device 100 (transformer) is the total average value obtained by averaging the noise values ​​at a specified distance (shown by the dotted line in Figure 2) and at the measurement point from the transformer radiation reference plane specified in the standard. Therefore, if a large noise source is located close to the radiation reference plane, the noise measurement value near that location will be large, and the total average value will also be large. In particular, if the gas blower 103 is located below the radiator 102, the noise value in the vicinity will increase. In contrast, in the first embodiment, as shown in Figure 2, the gas blower 103 is located approximately in the center of the top of the main tank 101. This makes it possible to uniformly distance all four sides from the noise measurement plane (shown by the double-headed arrow in Figure 2), thereby reducing the total average noise value.

[0020] The position of the gas blower 103 on the top of the main tank 101 is not limited to the approximate center, but may be disposed in a central area avoiding the peripheral areas. That is, for example, as shown in Fig. 3, if the top surface of the main tank 101 is rectangular, and imaginary lines are drawn to divide the rectangular top surface into four and divide it into 16 areas, the gas blower 103 may be disposed so as to be located in one of the four central areas (areas marked with lanes in Fig. 3) avoiding the 12 peripheral areas.

[0021] In the above first embodiment, an insulating gas is used as the insulating cooling medium, but when a liquid such as insulating oil is used, the same can be applied by using a liquid transfer pump instead of the gas blower 103. This also applies to the second to fourth embodiments described later.

[0022] (Second embodiment) Next, a second embodiment will be described with reference to Fig. 4. Note that parts corresponding to those in the first embodiment shown in Figs. 1 and 2 are given the same reference numerals and duplicated explanations will be omitted.

[0023] As shown in FIG. 4, the stationary induction electric device 200 according to the second embodiment has the same structure as the stationary induction electric device 100 according to the first embodiment, except that the position of the gas blower 103 in the upper part of the main tank 101 is changed from approximately the center to a position closer to the radiator 102 in the central region.

[0024] As shown in Fig. 4, noise measurements are taken at measurement point A1 at 1 / 3H height and measurement point A2 at 2 / 3H height relative to the height H of the stationary induction device. In stationary induction device 200 according to the second embodiment, gas blower 103 is positioned so that an obstacle such as main tank 101 is present on noise propagation straight line path N1 from gas blower 103 to measurement point A1 and on noise propagation straight line path N2 from gas blower 103 to measurement point A2. In this way, the presence of obstacles on noise propagation straight line paths N1 and N2 provides a noise suppression effect.

[0025] (Third embodiment) Next, a third embodiment will be described with reference to Fig. 5. Note that parts corresponding to those in the first embodiment shown in Figs. 1 and 2 are given the same reference numerals and duplicated explanations will be omitted.

[0026] As shown in Fig. 5, in a stationary induction motor 300 according to the third embodiment, a radiator 102 is provided with a cooling fan 105. A plurality of radiators 102 (six in the example shown in Fig. 5) are attached in a row to form a radiator row, and the cooling fans 105 are attached horizontally and collectively in the center of the radiator row of radiators 102 attached to the main tank 101.

[0027] The above configuration makes it possible to increase the distance between the cooling fan 105, which is the noise source, and the outer periphery of the transformer (radiation reference plane), which is the noise measurement point, thereby reducing the noise level. In addition, the radiator 102 panel and the main tank 101 surround the periphery, which makes it possible to suppress the diffusion of noise from the cooling fan 105.

[0028] (Fourth embodiment) Next, a fourth embodiment will be described with reference to Fig. 6. Note that parts corresponding to those in the first embodiment shown in Figs. 1 and 2 are given the same reference numerals and duplicated explanations will be omitted.

[0029] 6, the stationary induction electric device 400 according to the fourth embodiment has the same structure as the first, second, and third embodiments, except that a soundproof tank 106 is provided to cover the main tank 101 and the gas blower 103. The soundproof tank 106 is provided with sound-absorbing material and the like, and can prevent noise generated inside from leaking to the outside.

[0030] In the fourth embodiment, the soundproof tank 106 reduces noise, and since the gas blower 103 is attached to the top of the main tank 101, there is no need to increase the width of the soundproof tank 106 to cover the gas blower 103, which makes it possible to prevent the installation area from becoming too large.

[0031] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, modifications, and combinations can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0032] 100...Static induction electric device (first embodiment), 101...Main tank, 102...Heat sink, 103...Gas blower, 104...Pipe, 105...Cooling fan, 106...Soundproof tank, 200...Static induction electric device (second embodiment), 300...Static induction electric device (third embodiment), 400...Static induction electric device (fourth embodiment).

Claims

1. a static induction electric device body composed of an iron core and a winding; a main body tank in which the stationary induction electric device main body is housed and which is filled with a gaseous or liquid insulating cooling medium; Either a gas blower or a liquid transfer pump disposed in a central region of an upper portion of the main tank; a radiator disposed on a side of the main tank; a pipe connecting the main tank, the gas blower or the liquid pump, and the radiator; A static induction electric appliance comprising:

2. The static induction device according to claim 1, The gas blower or liquid pump is disposed in the central region of the upper part of the main tank, close to the radiator. A static induction electric appliance characterized by:

3. The static induction device according to claim 1 or 2, The stationary induction motor is characterized in that the radiator comprises a radiator row in which a plurality of radiators are arranged and attached, and one or a plurality of cooling fans are provided in the center of the radiator row.

4. The static induction device according to claim 1 or 2, A stationary induction appliance characterized by comprising a soundproof tank that surrounds the main tank and the gas blower or liquid feed pump.

5. a static induction electric device body composed of an iron core and a winding; a main body tank in which the stationary induction electric device main body is housed and which is filled with a gaseous or liquid insulating cooling medium; Either a gas blower or a liquid transfer pump disposed in a central region of an upper portion of the main tank; a radiator disposed on a side of the main tank; a pipe connecting the main tank, the gas blower or the liquid pump, and the radiator; A method for reducing noise from a static induction electric appliance, characterized in that noise is reduced by using a static induction electric appliance equipped with a

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