CN1048626A

CN1048626A - Shunt reactor common type transformer

Info

Publication number: CN1048626A
Application number: CN 90100967
Authority: CN
Inventors: 谷内健太郎; 祖开克二; 中昭治
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1989-07-06
Filing date: 1990-02-23
Publication date: 1991-01-16
Also published as: CN1017846B; DE69002708D1; JPH0682582B2; DE69002708T2; JPH0338807A; EP0406555B1; HK1003811A1; EP0406555A1

Abstract

A kind of shunt reactor common type transformer, shunt reactor comprises bypass iron core on the part that is arranged on the transformer yoke, be arranged on air-gap iron core and reactor winding in the space that is surrounded by the above-mentioned part of transformer yoke and above-mentioned bypass iron core, and the winding of transformer and the winding of shunt reactor are wound into the transformer flux and the reactor magnetic flux that make in the above-mentioned part of transformer yoke and cancel each other.

Like this, dwindle the installing space of transformer, reduced the sectional area of transformer yoke, thereby alleviated the weight of transformer.

Description

Shunt reactor common type transformer

The present invention relates to be used for the shunt reactor common type transformer of power transmission and distribution electric power system.

Fig. 6 is an internal structural map of for example opening existing shunt reactor common type 3 phase transformer that disclose in the clear 60-30112 communique the spy.Among the figure, 1 indication transformer, 2 expression shunt reactors, 3 expression fuel tanks.Main flux when in addition, the iron core of 1a indication transformer 1, the upper and lower yoke of 1b, 1c indication transformer 1, the winding of 1d indication transformer 1,1e indication transformer 1 are by excitation.2a represents the air-gap iron core of

shunt reactor

2, and 2b represents the top iron core of

shunt reactor

2, and 2d represents the winding of shunt reactor 2, the magnetic flux when 2e represents shunt reactor 2 by excitation.

The flux polarity that the winding 1d of transformer 1 and the winding 2d of reactor 2 respectively are wound among the air-gap 2a unshakable in one's determination of main flux among the 1a unshakable in one's determination of transformer 1 and shunt reactor 2 is identical.

Below effect is described.Fig. 7 be transformer 1 with shunt reactor 2 internal structural map when not shared.The 4th, the fuel tank of transformer 1, the 5th, the fuel tank of shunt reactor 2,2c are the bottom iron cores of shunt reactor 2.And Fig. 6 illustrates, and at the upper stack shunt reactor 2 of transformer 1, and the top 1b unshakable in one's determination of the bottom of shunt reactor 2 2c unshakable in one's determination and transformer 1 is shared.

In Fig. 6, the magnetic flux that flows through among the top yoke 1b of transformer 1 is as follows.

The 1st kind of situation is only to static exciter

Flow through the main flux 1e of transformer.

The 2nd kind of situation is only to the shunt reactor excitation

Flow through the magnetic flux 2e of shunt reactor.

The 3rd kind of situation transformer and the common excitation of shunt reactor

Flow through the magnetic flux of the difference of magnetic flux 1e and 2e.

Therefore, in Fig. 6, the size of the top of transformer 1 1b sectional area unshakable in one's determination is made under above-mentioned any situation also unsaturated, thereby has the identical functions with Fig. 7, and to compare installing space little with Fig. 7.

Because generally speaking, 1e＞2e, so the magnetic flux among the top yoke 1b of transformer 1 is maximum under the 1st kind of situation, thereby the sectional area of top yoke 1b must be onesize with bottom 1c unshakable in one's determination.

Because constitute above existing shunt reactor common type transformer resembles, the sectional area of transformer top yoke 1b must be big equally with bottom yoke 1c, so can not reduce transformer core weight.

The object of the invention is to address the above problem, and obtains at the shunt reactor common type transformer that transformer and incorporate while of shunt reactor can be reduced the iron core weight of transformer.

Shunt reactor common type transformer of the present invention is that the part at the transformer yoke is provided with the bypass iron core, with its yoke as shunt reactor.

Bypass iron core of the present invention plays the shunt of transformer main flux when the transformer independent excitation, simultaneously, play the yoke of shunt reactor when the shunt reactor excitation.

Fig. 1 is the cutaway view of one embodiment of the invention, Fig. 2, Fig. 3 are respectively the cutaway views that is used for the effect of key diagram 1 embodiment, Fig. 4, Fig. 5 are respectively the cutaway views of other embodiment, Fig. 6 is the cutaway view of existing shunt reactor common type transformer, and Fig. 7 is the cutaway view that is used for the effect of key diagram 6 embodiment.

Among the figure, 1 ... transformer, 2 ... shunt reactor, X ... the yoke of transformer, Y ... the bypass iron core, 1a ... the iron core of transformer, 1d ... the winding of transformer, 2a air-gap iron core, 2d ... the winding of shunt reactor.

Again, same-sign is represented identical or suitable part in each accompanying drawing.

Below, with reference to the accompanying drawings one embodiment of the present of invention are described.Fig. 1 illustrates the situation of shell-type single-phase transformer.Among the figure, the iron core of 1a indication transformer 1, the yoke of 1c indication transformer 1, the winding of 1d indication transformer 1,1e indication transformer 1 main flux during by excitation, the part of X indication transformer 1 yoke, Y represents the bypass iron core of yoke X.In addition, 2a is the air-gap iron core of

shunt reactor

2, and 2d is the winding of shunt reactor 2, is fenced up by yoke X and bypass Y unshakable in one's determination, and X, Y form the yoke of shunt reactor 2.Magnetic flux when 2e is illustrated in shunt reactor 2 by excitation.

At this, winding 1d, 2d coiling direction are that magnetic flux 1e, 2e among the yoke X are cancelled out each other.

Below effect is described.Among Fig. 2, shell type transformer 1 is bonded with each other the magnetic flux 2e reverse flow among the main flux 1e among the yoke 1c of transformer 1 and the yoke 2b of shunt reactor 2 with yoke 1c, 2b that shell-type shunt reactor 2 is arranged to both sides.

At this moment, Fig. 1 illustrates, the yoke 1e of transformer 1 and the yoke of shunt reactor 2 form one, become shared, cancel each other because of magnetic flux 1e and 2e reverse flow, so,, compare and can reduce with the sectional area of original yoke 1c as long as the sectional area of yoke X can be equivalent to the difference of 1e and 2e.

Fig. 3 illustrates the distribution of the magnetic flux when only transformer 1 being carried out excitation.At this moment, because the main flux of transformer 1 can separately flow through in yoke X and bypass Y unshakable in one's determination, so as long as the sectional area sum of yoke X and bypass Y unshakable in one's determination is equivalent to original yoke 1c's.

Therefore, the embodiment of Fig. 1 is by making an integral body with transformer 1 and the shunt reactor 2 of Fig. 2, just can be when dwindling installing space, part sectional area of 1c from figure of the yoke of transformer 1 is decreased to the sectional area of X.

Again, in the above-described embodiments single-phase transformer is described, still, as shown in Figure 4, also produces same effect for three-phase transformer.

In addition, in the above-described embodiments, shell type transformer is described, still, as shown in Figure 5, also produces same effect for core type transformer.

As mentioned above, according to the present invention, part at the transformer yoke is provided with the bypass iron core, make this bypass yoke that forms shunt reactor unshakable in one's determination, therefore, under arbitrary situation that transformer, shunt reactor work independently or work simultaneously, all has the effect of the sectional area that can reduce the transformer yoke.

Claims

1, a kind of shunt reactor common type transformer, it is characterized in that, shunt reactor comprises bypass iron core on the part that is arranged on above-mentioned transformer yoke, be arranged on air-gap iron core and reactor winding in the space that above-mentioned part and above-mentioned bypass iron core by above-mentioned transformer yoke surround, the above-mentioned bypass yoke that forms reactor unshakable in one's determination, simultaneously, the coiling direction of the winding of the winding of above-mentioned transformer and above-mentioned shunt reactor is the direction that makes that transformer flux in the above-mentioned part of above-mentioned transformer yoke and reactor magnetic flux are cancelled each other.