TWI384504B - Oil-immersed transformer with improved oil-duct strips arrangement - Google Patents

Description

Oil-immersed transformer with improved oil rail position

The invention relates to an oil immersed transformer, in particular to an oil immersed transformer with improved oil rail position.

Please refer to FIG. 1 and FIG. 2 first. FIG. 1 is a schematic side view of an oil-immersed transformer 1 including an oil groove 10 and three-phase windings 11, 12 and 13. 2 is a perspective view of the winding 11 including an outer winding 111, an outer winding spacer 112, a first insulating cylinder 113, a second insulating cylinder 114, an inner winding 115, an inner winding spacer 116, A core 117 and a plurality of oil rails 110. The outer winding spacer 112 includes eight winding spacers 112a-112h; the inner winding spacer 116 includes six winding spacers 116a-116f.

For the arrangement of the plurality of oil rails 110 in the prior art, please refer to FIG. 3 and FIG. 2 together. FIG. 3 is a plan view of the winding 11. As shown, the plurality of oil rails 110 includes a first oil rail set 1101, a second oil rail set 1102, a third oil rail set 1103, and a fourth oil rail set 1104. .

The first oil rail set 1101 includes eight oil rails disposed between the outer winding 111 and the first insulating cylinder 113 at a position spaced apart from the eight winding spacers 112a of the outer winding spacer 112. ~112h alignment.

The second oil rail set 1102 includes six oil passage rails disposed between the first insulation cylinder 113 and the second insulation cylinder 114, and is disposed at a position with six windings of the inner winding spacer ring 116. The spacers 112a to 112f are aligned.

The third oil rail set 1103 includes six oil rails disposed between the second insulating cylinder 114 and the inner winding 115 and disposed at a position spaced apart from the six winding spacers of the inner winding spacer 116. 112a~112f aligned.

The fourth oil rail set 1104 includes six oil rails disposed between the inner winding 115 and the core 117 and disposed at a position spaced apart from the six winding spacers 112a-112f of the inner winding spacer 116. Align.

The oil channel rails of the prior art are arranged in such a way that the oil channel rails of the outermost oil passages, that is, the first oil rail rail group 1101, are arranged to align the outer winding spacers 112a to 112h. Other oil rail strip configurations, such as second oil rail set 1102, third oil rail set 1103, and fourth oil rail set 1104, are compared to inner winding spacers 116a-116f.

When the electric field is analyzed in this configuration mode, since the dielectric oil of the insulating oil and the oil channel rail is different, if the inner oil passage has the oil passage rail and the outer oil passage corresponds to the oil passage rail, for example, as shown in FIG. At A, B, C, D, etc., the problem of electric field concentration occurs in the outer oil passage. Therefore, it is indeed necessary to improve on this issue.

For the sake of the job, the present invention provides an oil-immersed transformer with improved oil rail position, which can achieve an average electric field strength by changing the configuration of the oil passage rail without increasing the insulation distance, thereby avoiding electric field concentration. Part of the area is damaged by insulation.

In order to achieve the above object, the oil rail rail position improving oil-immersed transformer of the present invention comprises: an oil groove; an outer winding disposed in the oil groove; and an outer winding spacer ring disposed on the outer winding The outer winding spacer ring includes a plurality of winding spacers, at least one insulating barrel disposed in the outer winding and abutting the outer winding via a plurality of first oil rails; an inner winding, The system is disposed in the at least one insulation tube and abuts the at least one insulation tube via a plurality of second oil channel rails; an inner winding spacer ring is disposed on the inner winding, the inner winding spacer ring The system includes a plurality of winding spacers, the plurality of second oil rails are aligned to a plurality of winding spacers of the inner winding spacer; and a core disposed in the inner winding; wherein The plurality of first oil rails comprise oil channel rails abutting a plurality of winding spacers aligned to the inner winding spacer.

In order to more clearly illustrate the oil-immersed transformer of the improved oil channel rail position of the present invention, please refer to FIG. 1, FIG. 4 and FIG. 5 together. FIG. 1 is a schematic side view of the oil-immersed transformer 1 of the present invention. 4 is a perspective view of the winding 11 of the present invention, and FIG. 5 is a configuration diagram of the oil rail of a preferred embodiment of the present invention.

The oil immersed transformer 1 includes an oil sump 10 and three-phase windings 11, 12, and 13. The winding 11 includes an outer winding 111, an outer winding spacer 112, at least one insulating cylinder, an inner winding 115, an inner winding spacer 116, a core 117, and a plurality of oil rails 110. Preferably, the oil sump 10 is filled with insulating oil, and the plurality of oil channel rails 110 are wooden rails. Taking this embodiment as an example, the inner winding 115 is a low voltage winding and the outer winding 111 is a high voltage winding.

The outer winding spacer 112 is disposed on the outer winding 111. The outer winding spacer 111 includes a plurality of winding spacers. In the embodiment, the outer winding spacer 112 includes eight winding spacers. 112a~112h. The at least one insulating cylinder is disposed in the outer winding 111. In the embodiment, the at least one insulating cylinder comprises two insulating cylinders: a first insulating cylinder 113 and a second insulating cylinder 114. The inner winding 115 is disposed in the second insulating cylinder 114, and the inner winding spacer 116 is disposed on the inner winding 115, and includes a plurality of winding spacers. The inner winding spacer 116 provided in this embodiment includes six winding spacers 116a-116f.

The plurality of oil rails 110 includes a first oil rail group 1101, a second oil rail group 1102, a third oil rail group 1103, a fourth oil rail group 1104, and a fifth oil passage. Rail group 1105. The oil channel rail configuration diagram of the present invention is shown in FIG.

The first oil rail set 1101 includes eight oil rails disposed between the outer winding 111 and the first insulating cylinder 113 at a position spaced apart from the eight winding spacers 112a of the outer winding spacer 112. The ~112h is aligned and the first insulation barrel 113 is abutted against the outer winding 111.

The second oil gallery rail group 1102 includes six oil channel rails disposed between the first insulation cylinder 113 and the second insulation cylinder 114 at a position spaced apart from the six windings of the inner winding spacer ring 116. The sheets 112a to 112f are aligned, and the second insulating cylinder 114 is abutted against the first insulating cylinder 113.

The third oil rail set 1103 includes six oil passage rails disposed between the second insulation cylinder 114 and the inner winding 115, and is disposed at a position separated from the six winding spacers 112a of the inner winding spacer 116. The ~112f is aligned and the inner winding 115 is abutted against the second insulation barrel 114.

The fourth oil rail set 1104 includes twelve oil rails disposed between the inner winding 115 and the core 117 and abutting the core 117 against the inner winding 115. Wherein, the eight oil channel rails are disposed in alignment with the eight winding spacers 112a-112h of the outer winding spacer 112, and the other four oil rails are coupled to the winding spacers 116b, 116c of the inner winding spacer 116. 116e, 116f are aligned, that is, a, b, c, d, etc. shown in FIG. 4 and FIG.

According to the improved oil channel rail arrangement provided by the present invention, the present invention has an oil passage rail on the inner oil passage device and an oil passage rail on the outer oil passage without the oil passage rail. Strips, with this average electric field distribution, avoiding electric field concentration. Thereby, the average insulated electric field strength can be achieved under the same insulation distance.

However, the above-described embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

1. . . Oil immersed transformer

10. . . Oil tank

11~13. . . Winding

111. . . Outer winding

112. . . Outer winding spacer

113. . . First insulation cylinder

114. . . Second insulation cylinder

115. . . Inner winding

116. . . Inner winding spacer

117. . . core

110. . . Oil rail rail

112a~112h, 116a~116f. . . Winding spacer

1101. . . First oil rail set

1102. . . Second oil rail set

1103. . . Third oil rail set

1104. . . Fourth oil rail set

A, B, C, D A, b, c, d. . . position

Figure 1 is a side view of an oil immersed transformer.

Figure 2 is a perspective view of the winding.

Figure 3 is a conventional oil channel rail configuration diagram.

4 is a perspective view of a winding of a preferred embodiment of the present invention.

Figure 5 is a perspective view of a fuel rail of a preferred embodiment of the present invention.

112. . . Outer winding spacer

116. . . Inner winding spacer

112a~112h, 116a~116f. . . Winding spacer

1101. . . First oil rail set

1102. . . Second oil rail set

1103. . . Third oil rail set

1104. . . Fourth oil rail set

a, b, c, d. . . position

Claims (6)

An oil dam rail position improving oil immersed transformer comprises: an oil sump; an outer winding disposed in the oil sump; and an outer winding spacer ring disposed on the outer winding, the outer winding spacer ring system a plurality of winding spacers, at least one insulating cylinder disposed in the outer winding and abutting the outer winding via a plurality of first oil rails; an inner winding disposed on the at least one In the insulating cylinder, and abutting the at least one insulating cylinder via a plurality of second oil rails; an inner winding spacer ring disposed on the inner winding, the inner winding spacer ring comprising a plurality of winding intervals a plurality of second oil channel rails aligned against a plurality of winding spacers of the inner winding spacer; and a core disposed in the inner winding; wherein the plurality of first The oil rail rail includes an oil rail that abuts a plurality of winding spacers that are aligned to the inner winding spacer. The oil dam rail position improving oil immersed transformer according to claim 1, wherein the at least one insulating cylinder comprises: a first insulating cylinder disposed in the outer winding and passing through the plurality of The first oil rail is abutted to the outer winding; and a second insulating cylinder is disposed in the first insulating cylinder and abuts the first insulating cylinder via a plurality of third oil rails. The oil rail rail position improving oil immersed transformer according to claim 1, wherein the plurality of oil rail rails are wooden rails. The oil dam rail position improving oil immersed transformer according to claim 1, wherein the oil sump is filled with insulating oil. The oil dam rail position improving oil immersed transformer according to claim 1, wherein the inner winding is a low voltage winding. The oil dam rail position improving oil immersed transformer according to claim 1, wherein the outer winding is a high voltage winding.