CN203338958U

CN203338958U - Adjustable variable transformer

Info

Publication number: CN203338958U
Application number: CN201320438475XU
Authority: CN
Inventors: 陈小磊
Original assignee: Individual
Current assignee: BAOTOU ZHANHAO ELECTRICAL Ltd BY SHARE Ltd
Priority date: 2013-07-14
Filing date: 2013-07-14
Publication date: 2013-12-11
Anticipated expiration: 2023-07-14

Abstract

The utility model belongs to the technical field of transformer manufacture and particularly discloses an adjustable variable transformer. The adjustable variable transformer comprises a three-phase main transformer body, a three-phase series transformer body, an on-load tap-changer, and an oil tank, wherein the three-phase main transformer body is composed of a high-voltage winding arranged on a main transformer core column in a sleeved mode, a phase-shifting winding, a voltage-adjusting winding, and the like, and the three-phase series transformer body is composed of a series transformer iron core, a first winding, a secondary winding, and the like. A non-tap part of a voltage adjusting winding, a tap part of the voltage adjusting winding, a phase-shiting winding, a high-voltage winding, and a lower-voltage winding are sequentially arranged on each phase of iron core column of the three-phase main transformer body from inside to outside in a sleeved mode. A high-voltage outlet wire of the high-voltage winding is arranged on the end portion of the corresponding high-voltage winding. The adjustable variable transformer solves the problems that in the prior art, capacity can not be extra large, consumption is large, technology is difficult, cost is high, installation area is large, and installation is not convenient.

Description

A kind of regulatable variable transformer

Technical field

The utility model belongs to a kind of technical field of transformer manufacturing, has been specifically related to a kind of regulatable variable transformer.

Background technology

At present, two kinds of structures of the normal employing of the rectifier transformer of high-capacity.A kind of is series voltage-regulating; Another kind is combined by two transformers.Its objective is the low-voltage that high voltage is landed vertically and needs into rectifier.The basic structure of the rectifier transformer of series voltage-regulating is: the main transformer device body be comprised of main transformer iron core, excitation winding, pressure regulation winding etc., by string become unshakable in one's determination, with the secondary winding of main transformer device body mesolow windings in series, with main transformer device body in the string that forms of the winding etc. of pressure regulation windings in series become the device body, and main transformer device body, string change device body, on load tap changer etc. be placed in to a fuel tank form.The technical problem that the rectifier transformer of this series voltage-regulating exists is: due to when capacity is especially big, its main transformer device body and string become the device body and must increase, and make fuel tank width and highly corresponding increase, and the width of railway transportation and highly certain limit arranged, therefore, when capacity is especially big, be not easy to transportation.The structure of the another kind of rectifier transformer by two transformers combinations is: the rectifier transformer by the step-down of a platform independent and voltage regulating transformer, a platform independent forms, and its outside joins together.The technical problem that this rectifier transformer by two combinations exists is: due to by two separately independently the transformer combination form, so cost is high, loss is large, erection space is large and inconvenient.The series voltage-regulating of above-mentioned high-capacity rectifier transformer and be by the technical problem that two kinds of structures of two transformers combination also exist: 1, due to the restriction of structure, being only applicable to 110kV and following rectifier transformer, is therefore inapplicable to the high voltage rectifier transformer of 220kV; 2,, because its low pressure winding is overall structure, therefore in manufacture process, technique for coiling is more difficult.

The utility model content

For solving the technical problem existed in prior art, the utility model will provide be applicable to 220kV and can make especially big, the convenient transportation of capacity, cost is lower, loss is less, erection space is little and the technique for coiling of low pressure winding a kind of regulatable variable transformer easily.

The technical measures that the technical problem existed in the utility model solution prior art adopts are:

A kind of regulatable variable transformer, comprise by being enclosed within three-phase main transformer device body that high pressure winding on the main transformer core limb and phase shift winding and pressure regulation winding etc. form, by string, becoming three-phase string change device body, on load tap changer, fuel tank unshakable in one's determination and that winding and secondary winding etc. form, on every phase core limb of three-phase main transformer device body from inside to outside successively cover have the pressure regulation winding without tap part, pressure regulation winding tap part, phase shift winding, high pressure winding, low pressure winding arranged, the high-voltage terminal of high pressure winding is in the end of high pressure winding accordingly.

Further, be built-in with two three-phase main transformer device bodies and two three-phase strings change device bodies at a fuel tank, same being in parallel after corresponding high pressure winding and phase shift windings in series in two three-phase main transformer device bodies, the its corresponding three-phase string of each phase low pressure winding in each three-phase main transformer device body becomes each homophase secondary windings in series in the device body, and each forms " 8 " font coil, each homophase pressure regulation winding parallel in two three-phase main transformer device bodies becomes in the device body each by load tap changer and two three-phase strings, and with a winding after being in parallel, each is in series and forms loop together.

Further, if the pressure regulation winding is by without tap part with there is tap partly to form, can by without tap part and have tap partly respectively the tap by load tap changer in parallel select the part series connection, become a windings in series in the device body through the positive and negative switching part of on load tap changer and three-phase string after parallel connection and become loop, or become between winding two ends in the device body and be connected to again positive and negative diverter switch with the three-phase string after in parallel.

Further, " 8 " font coil consists of several " 8 " font line cake.

The utility model beneficial effect compared with the prior art is as follows:

1, due to the utility model adopt every phase core limb from inside to outside successively cover have the structure that tap part, phase shift winding, high pressure winding, low pressure winding are arranged without tap part, pressure regulation winding of pressure regulation winding to overcome prior art be only applicable to the deficiencies such as 110kV and following rectifier transformer and volume are larger, therefore be applicable to the rectifier transformer of 220kV, and volume is little;

2, because the utility model is built-in with two three-phase main transformer device bodies and two three-phase strings change device bodies at same fuel tank, can make the width of the especially big and product of product capacity and highly not transfinite, solved in prior art when product capacity is especially big, width and highly over the technical problem of railway transportation limit, therefore, can product capacity especially big, and convenient transportation;

3, the overall structure that is same fuel tank due to the utility model, solved formed by two fuel tanks in the prior art two transformers and externally being connected and the technical problem such as the loss that produces is large, cost is high, erection space is large independently separately, so loss is little, cost is low, erection space is little and convenient;

4, because " 8 " of the present utility model font coil consists of several " 8 " font line cake, so technique for coiling is simple, convenient.

The accompanying drawing explanation

Fig. 1 is the utility model device body arrangement architecture embodiment schematic diagram;

The basic connection principle typical figure mutually that Fig. 2 is a kind of embodiment of the utility model;

The phase connection schematic diagram that Fig. 3 is the another kind of embodiment of the utility model;

Fig. 4 is that the utility model main transformer winding is arranged the example structure schematic diagram;

Fig. 5 is the utility model " 8 " font line cake example structure schematic diagram.

In figure: W, fuel tank, ABC, three-phase main transformer device body, abc, three-phase string become the device body, A1, B1, C1, each phase high-voltage terminal, X, main transformer iron core, Xz, core limb, T, pressure regulation winding, Tj, without the tap part, Tf, have the tap part, G, high pressure winding, Gy, phase shift winding, x, string become unshakable in one's determination, y, a winding, e, secondary winding, K1, on load tap changer, K2, positive and negative diverter switch, " 8 ", " 8 " font line cake.

Embodiment

With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5.The utility model comprises the three-phase main transformer device body ABC that the high pressure winding G that is enclosed within on main transformer core limb Xz and phase shift winding Gy and pressure regulation winding T etc. form, become by string the three-phase string change device body abc that x unshakable in one's determination and winding y and secondary winding e etc. form, on load tap changer K1, fuel tank W etc., its architectural feature is: on every phase core limb Xz of three-phase main transformer device body ABC from inside to outside successively the cover have pressure regulation winding T without tap part Tj, pressure regulation winding T has a tap part Tf, phase shift winding Gy, high pressure winding G, low pressure winding D, the high-voltage terminal A1 of high pressure winding G, B1, C1 is respectively in the end of corresponding high pressure winding G.Be built-in with two three-phase main transformer device body ABC and two three-phase strings change device body abc at a fuel tank W, each three-phase main transformer device body ABC is by main transformer X unshakable in one's determination, high pressure winding G, phase shift winding Gy, low pressure winding D, the compositions such as pressure regulation winding T, each three-phase string becomes device body abc and becomes x unshakable in one's determination by string, a winding y, the compositions such as secondary winding e, same being in parallel after corresponding high pressure winding G and phase shift winding Gy series connection in two three-phase main transformer device body ABC, the its corresponding three-phase string of each phase low pressure winding D in each three-phase main transformer device body ABC becomes each homophase secondary winding e series connection in device body abc, and each forms " 8 " font coil, each homophase pressure regulation winding T parallel connection in two three-phase main transformer device body ABC by load tap changer K1 and two three-phase strings become in device body abc each with a winding y after being in parallel each with being in series and forming loop, if pressure regulation winding T is by without tap part Tj and have tap part Tf to form, can by without tap part Tj and have tap part Tf respectively the tap by load tap changer K1 in parallel select the part series connection, through the positive and negative switching part of on load tap changer K1 with in parallel after a winding y becoming in device body abc of three-phase string be connected into loop, or become between winding y two ends in device body abc and be connected to again positive and negative diverter switch K2 with the three-phase string after in parallel." 8 " font coil consists of several " 8 " font line cake.

Claims

1. a regulatable variable transformer, comprise by being enclosed within three-phase main transformer device body that high pressure winding on the main transformer core limb and phase shift winding and pressure regulation winding etc. form, by string, becoming three-phase string change device body, on load tap changer, fuel tank unshakable in one's determination and that winding and secondary winding etc. form, it is characterized in that: on every phase core limb of three-phase main transformer device body from inside to outside successively cover have the pressure regulation winding without tap part, pressure regulation winding tap part, phase shift winding, high pressure winding, low pressure winding arranged, the high-voltage terminal of high pressure winding is in the end of high pressure winding accordingly.

2. a kind of regulatable variable transformer according to claim 1, it is characterized in that: at a fuel tank, be built-in with two three-phase main transformer device bodies and two three-phase strings change device bodies, same being in parallel after corresponding high pressure winding and phase shift windings in series in two three-phase main transformer device bodies, the its corresponding three-phase string of each phase low pressure winding in each three-phase main transformer device body becomes each homophase secondary windings in series in the device body, and each forms " 8 " font coil, each homophase pressure regulation winding parallel in two three-phase main transformer device bodies by load tap changer and two three-phase strings become in the device body each with a winding after being in parallel each with being in series and forming loop.

3. a kind of regulatable variable transformer according to claim 1 and 2, it is characterized in that: if the pressure regulation winding is by without tap part with there is tap partly to form, can by without tap part and have tap partly respectively the tap by load tap changer in parallel select the part series connection, become a windings in series in the device body through the positive and negative switching part of on load tap changer and three-phase string after parallel connection and become loop, or become between winding two ends in the device body and be connected to again positive and negative diverter switch with the three-phase string after in parallel.

4. a kind of regulatable variable transformer according to claim 3, it is characterized in that: " 8 " font coil consists of several " 8 " font line cake.