CN109659121B

CN109659121B - Transformer switch group, transformer, and capacity adjusting method and device of transformer

Info

Publication number: CN109659121B
Application number: CN201811519339.7A
Authority: CN
Inventors: 张淼; 张德明; 章宏仁; 李洪涛; 魏彩霞; 宋一凡; 叶韩超; 张翊堂
Original assignee: Shandong Electrical Engineering & Equipment Group Intelligent Electric Co ltd; Zhejiang Tenglong Electrical Apparatus Co ltd; ZUNYI INSTITUTE OF PRODUCTS QUALITY INSPECTION AND TESTING; State Grid Corp of China SGCC; State Grid Beijing Electric Power Co Ltd
Current assignee: Shandong Electrical Engineering & Equipment Group Intelligent Electric Co ltd; Zhejiang Tenglong Electrical Apparatus Co ltd; ZUNYI INSTITUTE OF PRODUCTS QUALITY INSPECTION AND TESTING; State Grid Corp of China SGCC; State Grid Beijing Electric Power Co Ltd
Priority date: 2018-12-12
Filing date: 2018-12-12
Publication date: 2020-10-13
Anticipated expiration: 2038-12-12
Also published as: CN109659121A

Abstract

The application discloses a transformer switch group, a transformer, and a transformer capacity regulating method and device. The transformer switch group comprises: the first switch group is arranged on the low-voltage side of the transformer, and the second switch group is arranged on the high-voltage side of the transformer; the first switch group includes: the device comprises a first vacuum switch, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch and a first transition resistor; the second switch group includes: the switch comprises a first vacuum switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch and a first transition resistor. Through the vacuum switch, the problems that a plurality of vacuum switches are needed in a capacity regulating switch group in the related art, a plurality of vacuum bubbles are equipped, and the cost is high are solved.

Description

Transformer switch group, transformer, and capacity adjusting method and device of transformer

Technical Field

The application relates to the field of transformers, in particular to a transformer switch block, a transformer, and a capacitance adjusting method and device of the transformer.

Background

The on-load capacity-regulating tap switch is a switch which can realize the regulation of the capacity of a transformer by simultaneously regulating the number of turns of windings on a high-voltage side and a low-voltage side or a connection mode and keeping the effective value of the output voltage on the low-voltage side basically unchanged according to the change condition of the actual operation load in the same transformer. The capacity regulating transformer can effectively reduce no-load loss and realize the improvement of energy-saving effect. At present, along with the improvement of the requirement on power supply reliability, an on-load capacitance-regulating tap switch is adopted by more and more capacitance-regulating transformers by relying on the advantage of keeping power supply continuity in the capacitance regulating process.

The on-load tap-changer equipped with the early power transformer mostly adopts transition resistance switching, and the load conversion is carried out by a copper-tungsten arc contact. The tap changer has frequent switching, correspondingly serious burning loss of an arc contact, high carbonization and pollution speed of oil, and increased workload of daily maintenance and regular overhaul for a power supply department. In recent years, along with the wide popularization of vacuum technology, the on-load tap-changer also has revolutionary changes, and in order to solve the problem of oil pollution, the on-load tap-changer with vacuum arc extinguishing comes along with the vacuum technology, and meanwhile, the vacuum on-load tap-changer can effectively prolong the mechanical life and the electrical life of a contact, prolong the maintenance period, obviously reduce the maintenance cost and improve the reliability and the safety of operation. Domestic and foreign loaded tap-changer manufacturing enterprises have developed the research and development of vacuum loaded tap-changers successively. However, in order to realize the capacity regulating function, a plurality of vacuum bubbles are needed in the on-load tap-changer, the cost of the vacuum bubbles, especially the high-voltage vacuum bubbles, is high, and in the capacity regulating application of the distribution transformer, 12-30 high-low voltage vacuum bubbles are needed to be configured, so that the equipment is large in size and high in manufacturing cost.

Aiming at the problems that a plurality of vacuum switch bulbs are required to be used in a vacuum on-load tap-changing capacity-regulating switch group in the related art and the manufacturing cost is high, an effective solution is not provided at present.

Disclosure of Invention

The application mainly aims to provide a transformer switch bank, a transformer capacity regulating method and a transformer capacity regulating device, so as to solve the problems that in the related art, a plurality of vacuum switch bulbs are required to be used in a vacuum on-load tap capacity regulating switch bank, and the manufacturing cost is high.

In order to achieve the above object, according to one aspect of the present application, there is provided a transformer switch group. The transformer switch group comprises: the first switch group is arranged on the low-voltage side of the transformer, and the second switch group is arranged on the high-voltage side of the transformer; wherein, the first switch group includes: the first vacuum switch is arranged at the first end of the first vacuum switch, and the second switch is arranged at the second end of the first vacuum switch; a third switch disposed between the first end of the first vacuum switch and the first end of the first coil at the low voltage side; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil at the low voltage side; the first transition resistor is arranged between the second end of the first vacuum switch and the first end of the second coil; a fifth switch disposed between the first end of the first coil and the first end of the second coil; a sixth switch disposed between the first end of the first coil and the second end of the second coil; a seventh switch disposed between the second end of the first coil and the second end of the second coil; the second switch group includes: the first end of the second vacuum switch is provided with a ninth switch; a tenth switch disposed between the first end of the second vacuum switch and the first end of the third coil on the high voltage side; an eleventh switch disposed between the first end of the second vacuum switch and the first end of the fourth coil on the high voltage side; a second transition resistor disposed between the second end of the second vacuum switch and the first end of the fourth coil; a twelfth switch disposed between the first end of the third coil and the first end of the fourth coil; a thirteenth switch disposed between the first end of the third coil and the second end of the fourth coil; and a fourteenth switch disposed between the second end of the third coil and the second end of the fourth coil.

Further, the transformer switch group further comprises: a fifteenth switch disposed between the second end of the first vacuum switch and the first end of the second coil; and a sixteenth switch disposed between the second end of the second vacuum switch and the first end of the fourth coil.

In order to achieve the above object, according to another aspect of the present application, there is provided a transformer including the above transformer switch group. The transformer includes: the three groups of low-voltage side coil groups are arranged on the low-voltage side of the iron core, and the first switch group is arranged between each group of low-voltage side coil groups and the low-voltage neutral point, wherein each group of low-voltage side coil groups comprises two groups of coils, the first switch of the first switch group is arranged between the first end of the first vacuum switch and the low-voltage neutral point, and the second switch of the first switch group is arranged between the second end of the first vacuum switch and the low-voltage neutral point; and the three groups of high-voltage side coil groups are arranged on the high-voltage side of the iron core, the second switch group is arranged between each group of high-voltage side coil group and the phase line, each group of high-voltage side coil group comprises two groups of coils, the eighth switch of the second switch group is arranged between the first end of the second vacuum switch and the phase line, and the ninth switch of the second switch group is arranged between the second end of the second vacuum switch and the phase line.

Further, the transformer further comprises: the fifteenth switch is arranged between the first end of the second coil in the three groups of low-voltage side coil groups and the second end of the first vacuum switch of the first switch group; and sixteenth switches are respectively arranged between the first ends of the fourth coils in the three groups of high-voltage side coil groups and the second ends of the second vacuum switches of the second switch group.

In order to achieve the above object, according to another aspect of the present application, a method for regulating capacitance of a transformer is provided, which is applied to the transformer. The method comprises the following steps: controlling the first switch of each first switch group to be closed to be opened, and simultaneously controlling the eighth switch of each second switch group to be closed to be opened; before the first switch and the eighth switch are opened from closing, controlling each second switch to be opened from closing, and simultaneously controlling each ninth switch to be opened from closing; after the first switch and the eighth switch are switched from closed to open, controlling each third switch from closed to open, and simultaneously controlling each tenth switch from closed to open; after the third switch and the tenth switch are switched from closed to open, controlling each fourth switch from open to closed, and simultaneously controlling each eleventh switch from open to closed; before the second switch and the ninth switch are opened to be closed, controlling each fifth switch to be closed to be opened, and simultaneously controlling each twelfth switch to be closed to be opened; after the fifth switch and the twelfth switch are closed to opened and before the second switch and the ninth switch are opened to closed, controlling the sixth switch of each first switch group to be opened to closed and simultaneously controlling each thirteenth switch to be opened to closed; after the fifth switch and the twelfth switch are closed to opened and before the sixth switch and the thirteenth switch are opened to closed, controlling each seventh switch to be closed to opened and simultaneously controlling each fourteenth switch to be closed to opened; before the fifth switch and the twelfth switch are switched from closed to open, the first vacuum switch is controlled to be switched from open to closed, and the second vacuum switch is controlled to be switched from open to closed; after the fifth switch and the twelfth switch are closed to opened and before the seventh switch and the fourteenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the sixth switch and the thirteenth switch are opened to closed and before the second switch and the ninth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the first switch and the eighth switch are switched from closed to open and before the third switch and the tenth switch are switched from closed to open, controlling the first vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the fourth switch and the eleventh switch are opened to be closed, the first vacuum switch is controlled to be opened to be closed, and meanwhile, the second vacuum switch is controlled to be opened to be closed.

Further, in the case that the transformer further includes a fifteenth switch respectively disposed between the first ends of the second coils in the three sets of low-voltage side coil groups and the second end of the first vacuum switch of the first switch group, and a sixteenth switch respectively disposed between the first ends of the fourth coils in the three sets of high-voltage side coil groups and the second end of the second vacuum switch of the second switch group, the method further includes: after the first vacuum switch and the second vacuum switch are closed to opened for the first time and before the seventh switch and the fourteenth switch are closed to opened, controlling the fifteenth switch to be closed to opened and simultaneously controlling the sixteenth switch to be closed to opened; after the first vacuum switch and the second vacuum switch are opened to closed for the last time, the fifteenth switch is controlled to be opened to closed, and the sixteenth switch is controlled to be opened to closed.

In order to achieve the above object, according to another aspect of the present application, another transformer capacitance adjusting method is provided, which is applied to the above transformer. The method comprises the following steps: controlling the first switch of each first switch group to be opened to be closed, and simultaneously controlling the eighth switch of each second switch group to be opened to be closed; after the first switch and the eighth switch are opened to closed, controlling each second switch to be closed to opened, and simultaneously controlling each ninth switch to be closed to opened; before the first switch and the eighth switch are opened to closed, controlling each third switch to be opened to closed, and simultaneously controlling each tenth switch to be opened to closed; before the third switch and the tenth switch are switched from open to closed, controlling each fourth switch from closed to open, and simultaneously controlling each eleventh switch from closed to open; after the second switch and the ninth switch are switched from closed to open, controlling each fifth switch from open to closed and simultaneously controlling each twelfth switch from closed to open; before the fifth switch and the twelfth switch are opened to be closed and after the ninth switch of the second switch is closed to be opened, controlling each sixth switch to be closed to be opened and simultaneously controlling each thirteenth switch to be closed to be opened; before the fifth switch and the twelfth switch are opened to closed and after the sixth switch and the thirteenth switch are closed to opened, controlling the seventh switch of each first switch group to be opened to closed and simultaneously controlling each fourteenth switch to be closed to opened; before the fourth switch and the eleventh switch are switched from closed to open, controlling the first vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the third switch and the tenth switch are opened to closed and before the first switch and the eighth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the second switch and the ninth switch are switched from closed to open and before the sixth switch and the thirteenth switch are switched from closed to open, controlling the vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the seventh switch and the fourteenth switch are opened to closed and before the fifth switch and the twelfth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the fifth switch and the twelfth switch are opened to be closed, the first vacuum switch is controlled to be closed to be opened, and meanwhile, the second vacuum switch is controlled to be closed to be opened.

Further, in the case that the transformer further includes a fifteenth switch respectively disposed between the first ends of the second coils in the three sets of low-voltage side coil groups and the second end of the first vacuum switch of the first switch group, and a sixteenth switch respectively disposed between the first ends of the fourth coils in the three sets of high-voltage side coil groups and the second end of the second vacuum switch of the second switch group, the method further includes: the fifteenth switch is controlled from closed to open while the sixteenth switch is controlled from closed to open before the first and second vacuum switches are first closed to open, the fifteenth switch is controlled from open to closed while the sixteenth switch is controlled from open to closed before the first and second vacuum switches are last open to closed, and after the seventh and fourteenth switches are open to closed.

In order to achieve the above object, according to another aspect of the present application, a transformer capacitance adjusting apparatus is provided, which is applied to the above transformer. The device includes: a first control unit for controlling the first switch of each first switch group from closed to open and simultaneously controlling the eighth switch of each second switch group from closed to open; a second control unit for controlling each second switch from open to closed and simultaneously controlling each ninth switch from open to closed before the first switch and the eighth switch from closed to open; a third control unit for controlling each third switch from closed to open and simultaneously controlling each tenth switch from closed to open after the first switch and the eighth switch are closed to open; a fourth control unit for controlling each fourth switch from open to close and simultaneously controlling each eleventh switch from open to close after the third switch and the tenth switch from closed to open; a fifth control unit for controlling each fifth switch from closed to open and simultaneously controlling each twelfth switch from closed to open before the second switch and the ninth switch from open to closed; a sixth control unit for controlling the sixth switch of each first switch group to be opened to closed and simultaneously controlling each thirteenth switch to be opened to closed after the fifth switch and the twelfth switch are closed to opened and before the second switch and the ninth switch are opened to closed; a seventh control unit for controlling each seventh switch from closed to open and simultaneously controlling each fourteenth switch from closed to open after the fifth switch and the twelfth switch are closed to open and before the sixth switch and the thirteenth switch are opened to closed; an eighth control unit for controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed before the fifth switch and the twelfth switch are closed to opened; after the fifth switch and the twelfth switch are closed to opened and before the seventh switch and the fourteenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the sixth switch and the thirteenth switch are opened to closed and before the second switch and the ninth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the first switch and the eighth switch are switched from closed to open and before the third switch and the tenth switch are switched from closed to open, controlling the first vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the fourth switch and the eleventh switch are opened to be closed, the first vacuum switch is controlled to be opened to be closed, and meanwhile, the second vacuum switch is controlled to be opened to be closed.

In order to achieve the above object, according to another aspect of the present application, another transformer capacitance adjusting apparatus is provided, which is applied to the above transformer. The device includes: a ninth control unit for controlling the first switch of each first switch group to be opened to closed and simultaneously controlling the eighth switch of each second switch group to be opened to closed; a tenth control unit for controlling each second switch from closed to open, and simultaneously controlling each ninth switch from closed to open, after the first switch and the eighth switch are closed from open to closed; an eleventh control unit for controlling each third switch from open to closed and simultaneously controlling each tenth switch from open to closed before the first switch and the eighth switch from open to closed; a twelfth control unit for controlling each fourth switch from closed to open and simultaneously controlling each eleventh switch from closed to open before the third switch and the tenth switch from open to closed; a thirteenth control unit for controlling each fifth switch from open to close and simultaneously controlling each twelfth switch from close to open after the second switch and the ninth switch from close to open; a fourteenth control unit for controlling each sixth switch from closed to open and simultaneously controlling each thirteenth switch from closed to open before the fifth switch and the twelfth switch from open to closed and after the ninth switch of the second switch from closed to open; a fifteenth control unit for controlling the seventh switch of each first switch group from open to closed and simultaneously controlling each fourteenth switch from closed to open before the fifth switch and the twelfth switch are closed from open to closed and after the sixth switch and the thirteenth switch are closed to open; a sixteenth control unit for controlling the first vacuum switch to be closed to be opened and simultaneously controlling the second vacuum switch to be closed to be opened before the fourth switch and the eleventh switch are closed to be opened; after the third switch and the tenth switch are opened to closed and before the first switch and the eighth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the second switch and the ninth switch are switched from closed to open and before the sixth switch and the thirteenth switch are switched from closed to open, controlling the vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the seventh switch and the fourteenth switch are opened to closed and before the fifth switch and the twelfth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the fifth switch and the twelfth switch are opened to be closed, the first vacuum switch is controlled to be closed to be opened, and meanwhile, the second vacuum switch is controlled to be closed to be opened.

This application transformer switch group includes: the first switch group is arranged on the low-voltage side of the transformer, and the second switch group is arranged on the high-voltage side of the transformer; wherein, the first switch group includes: the first vacuum switch is arranged at the first end of the first vacuum switch, and the second switch is arranged at the second end of the first vacuum switch; a third switch disposed between the first end of the first vacuum switch and the first end of the first coil at the low voltage side; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil at the low voltage side; the first transition resistor is arranged between the second end of the first vacuum switch and the first end of the second coil; a fifth switch disposed between the first end of the first coil and the first end of the second coil; a sixth switch disposed between the first end of the first coil and the second end of the second coil; a seventh switch disposed between the second end of the first coil and the second end of the second coil; the second switch group includes: the first end of the second vacuum switch is provided with a ninth switch; a tenth switch disposed between the first end of the second vacuum switch and the first end of the third coil on the high voltage side; an eleventh switch disposed between the first end of the second vacuum switch and the first end of the fourth coil on the high voltage side; a second transition resistor disposed between the second end of the second vacuum switch and the first end of the fourth coil; a twelfth switch disposed between the first end of the third coil and the first end of the fourth coil; a thirteenth switch disposed between the first end of the third coil and the second end of the fourth coil; and the fourteenth switch is arranged between the second end of the third coil and the second end of the fourth coil, so that the problems that a plurality of vacuum switch bulbs are required to be used in a vacuum on-load tap-changing capacity-regulating switch group in the related art and the manufacturing cost is high are solved. The capacity of the transformer switch group only comprising six vacuum switches is adjusted, so that the effects of reducing the number of vacuum bubbles and reducing the cost are achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

fig. 1 is a schematic diagram of a transformer switch bank provided according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a low-voltage side coil and a first switch set of a transformer according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a high-side coil and a second switch set of a transformer according to an embodiment of the present application;

fig. 4 is a timing diagram illustrating a method for regulating capacitance of a transformer according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a capacity regulating device of a transformer according to an embodiment of the present application; and

fig. 6 is a schematic diagram of another transformer capacitance adjusting device provided in an embodiment of the present application.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

According to an embodiment of the present application, a transformer switch bank is provided.

Fig. 1 is a schematic diagram of a transformer switch bank according to an embodiment of the present application. As shown in fig. 1, the transformer switch set includes: a first switch group 10 arranged at the low-voltage side of the transformer, and a second switch group 20 arranged at the high-voltage side of the transformer; wherein, the first switch group 10 includes: the first vacuum switch is arranged at the first end of the first vacuum switch, and the second switch is arranged at the second end of the first vacuum switch; a third switch disposed between the first end of the first vacuum switch and the first end of the first coil at the low voltage side; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil at the low voltage side; the first transition resistor is arranged between the second end of the first vacuum switch and the first end of the second coil; a fifth switch disposed between the first end of the first coil and the first end of the second coil; a sixth switch disposed between the first end of the first coil and the second end of the second coil; a seventh switch disposed between the second end of the first coil and the second end of the second coil; the second switch group 20 includes: the first end of the second vacuum switch is provided with a ninth switch; a tenth switch disposed between the first end of the second vacuum switch and the first end of the third coil on the high voltage side; an eleventh switch disposed between the first end of the second vacuum switch and the first end of the fourth coil on the high voltage side; a second transition resistor disposed between the second end of the second vacuum switch and the first end of the fourth coil; a twelfth switch disposed between the first end of the third coil and the first end of the fourth coil; a thirteenth switch disposed between the first end of the third coil and the second end of the fourth coil; and a fourteenth switch disposed between the second end of the third coil and the second end of the fourth coil.

It should be noted that, in the transformer capacitance adjusting process, the transformer switch group in this embodiment is used, and the series-parallel switching of the transformer coil winding is realized by changing the on-off state of each switch of the switch group, so as to realize the adjustment of the transformer capacitance. Because only six vacuum switches are used in the transformer switch group in the embodiment, and the other switches are all common switches, the using amount of the vacuum switches is reduced, and the using amount of vacuum bubbles for arc extinction is correspondingly reduced, so that the cost is saved, and the equipment volume is reduced.

Optionally, the transformer switch block provided in the embodiment of the present application further includes: a fifteenth switch disposed between the second end of the first vacuum switch and the first end of the second coil; and a sixteenth switch disposed between the second end of the second vacuum switch and the first end of the fourth coil.

It should be noted that, in the use process of the transformer switch group, after the fifth switch is turned off through test verification, whether the low-voltage side parallel winding of the transformer generates an arc or not is verified, and if the arc is generated, a fifteenth switch is arranged between the second end of the first vacuum switch and the first end of the second coil of each group of coils; and after the twelfth switch is turned off, whether the high-voltage side parallel winding of the transformer generates electric arcs is verified through tests, and if the electric arcs are generated, a sixteenth switch is arranged between the second end of the second vacuum switch and the first end of the fourth coil of each group of coils.

The transformer switch group that this application embodiment provided includes: a first switch group 10 arranged at the low-voltage side of the transformer, and a second switch group 20 arranged at the high-voltage side of the transformer; wherein, the first switch group 10 includes: the first vacuum switch is arranged at the first end of the first vacuum switch, and the second switch is arranged at the second end of the first vacuum switch; a third switch disposed between the first end of the first vacuum switch and the first end of the first coil at the low voltage side; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil at the low voltage side; the first transition resistor is arranged between the second end of the first vacuum switch and the first end of the second coil; a fifth switch disposed between the first end of the first coil and the first end of the second coil; a sixth switch disposed between the first end of the first coil and the second end of the second coil; a seventh switch disposed between the second end of the first coil and the second end of the second coil; the second switch group 20 includes: the first end of the second vacuum switch is provided with a ninth switch; a tenth switch disposed between the first end of the second vacuum switch and the first end of the third coil on the high voltage side; an eleventh switch disposed between the first end of the second vacuum switch and the first end of the fourth coil on the high voltage side; a second transition resistor disposed between the second end of the second vacuum switch and the first end of the fourth coil; a twelfth switch disposed between the first end of the third coil and the first end of the fourth coil; a thirteenth switch disposed between the first end of the third coil and the second end of the fourth coil; and the fourteenth switch is arranged between the second end of the third coil and the second end of the fourth coil, so that the problems that a plurality of vacuum switch bulbs are required to be used in a vacuum on-load tap-changing capacity-regulating switch group in the related art and the manufacturing cost is high are solved. The capacity of the transformer switch group only comprising six vacuum switches is adjusted, so that the effects of reducing the number of vacuum bubbles and reducing the cost are achieved.

According to an embodiment of the present application, there is provided a transformer including: the three groups of low-voltage side coil groups are arranged on the low-voltage side of the iron core, the first switch group is arranged between each group of low-voltage side coil group and the low-voltage neutral point, each group of low-voltage side coil group comprises two groups of coils, the first switch of the first switch group is arranged between the first end of the first vacuum switch and the low-voltage neutral point, and the second switch of the first switch group is arranged between the second end of the first vacuum switch and the low-voltage neutral point.

As shown in fig. 2, the configuration of the low-voltage side coils of the transformer provided in the embodiment of the present application is schematically illustrated, a first switch group is disposed between each low-voltage side coil group and the low-voltage neutral point, in three transformer switch groups, a first vacuum switch is respectively represented as DA1, DB1 and DC1, a first switch TRDA1, TRDB1 and TRDC1, a second switch is respectively represented as TRDA2, TRDB2 and TRDC2, and the switching between the transformer switch groups and the low-voltage neutral point is realized by the first switch or the second switch, it should be noted that the first switch and the second switch cannot be simultaneously in an open state, the third switch is respectively represented as TRDA3, TRDB3 and TRDC3, the fourth switch is respectively represented as TRDA4, TRDB4 and TRDC4, it should be noted that the third switch and the fourth switch cannot be simultaneously in a closed state, a fifth switch is respectively represented as TRDA5, TRDB5 and a sixth switch 5, and the fifth switch is respectively represented as TRDA6, and the TRDB6, and the sixth switch is respectively represented as TRDC4, TRDB6 and TRDC6, wherein the seventh switch is represented as TRDA7, TRDB7 and TRDC7, respectively, the sixth switch and the seventh switch cannot be simultaneously closed, the first transition resistors are represented as DRA1, DRB1 and DRC1, the first coil is represented as TA1, TB1 and TC1, the second coil is represented as TA2, TB2 and TC2, respectively, and the low-voltage neutral point is represented as a DC point in the figure.

The three groups of high-voltage side coil groups are arranged on the high-voltage side of the iron core, and the second switch group is arranged between each group of high-voltage side coil group and the phase line, wherein each group of high-voltage side coil group comprises two groups of coils, an eighth switch of the second switch group is arranged between a first end of the second vacuum switch and the phase line, and a ninth switch of the second switch group is arranged between a second end of the second vacuum switch and the phase line;

as shown in fig. 3, the structural diagram of the high-voltage side coil of the transformer provided in the embodiment of the present application is shown, the second switch group is disposed between each high-voltage side coil group and the phase line, in the three transformer switch groups, the second vacuum switches are respectively represented as GA2, GB2 and GC2, the eighth switches are respectively represented as TRGA8, TRGB8 and TRGC8, the ninth switches are respectively represented as TRGA9, TRGB9 and TRGC9, the eighth switch or the ninth switch is used to turn on/off the transformer switch group and the phase line, it is required to say that the eighth switch and the ninth switch cannot be simultaneously in an open state, the tenth switch is respectively represented as TRGA10, TRGB10 and TRGC10, the eleventh switch is respectively represented as TRGA11, TRGB11 and TRGC11, it is required to say that the tenth switch and the eleventh switch cannot be simultaneously in a closed state, the twelfth switches are respectively represented as TRGA 638, TRGB12 and TRGB13, and TRGC13, TRGB13 and TRGC13, the fourteenth switches are denoted as TRGA14, TRGB14 and TRGC14, respectively, it should be noted that the thirteenth switch and the fourteenth switch cannot be simultaneously in a closed state, the second transition resistances are denoted as GRA2, GRB2 and GRC2, the third coils are denoted as TA3, TB3 and TC3, and the fourth coils are denoted as TA4, TB4 and TC4 high voltage neutral wires, respectively.

Optionally, the transformer provided in the embodiment of the present application further includes: the fifteenth switch is arranged between the first end of the second coil in the three groups of low-voltage side coil groups and the second end of the first vacuum switch of the first switch group; and sixteenth switches are respectively arranged between the first ends of the fourth coils in the three groups of high-voltage side coil groups and the second ends of the second vacuum switches of the second switch group.

As shown in fig. 2, among the three groups of transformer switches on the low-voltage side, fifteenth switches are provided, which are denoted as TRDA15, TRDB15, and TRDC15, respectively. As shown in fig. 3, among the three sets of transformer switch groups on the high voltage side, sixteenth switches are provided which are denoted as TRGA16, TRGB16, and TRGC16, respectively. Through this embodiment, guaranteed that fifth switch and twelfth switch can not produce the electric arc after directly breaking.

According to the embodiment of the application, a transformer capacity regulating method is provided and applied to the transformer.

The method comprises the following steps: controlling a first switch of each transformer switch group from closed to open; controlling the first switch of each first switch group to be closed to be opened, and simultaneously controlling the eighth switch of each second switch group to be closed to be opened; before the first switch and the eighth switch are opened from closing, controlling each second switch to be opened from closing, and simultaneously controlling each ninth switch to be opened from closing; after the first switch and the eighth switch are switched from closed to open, controlling each third switch from closed to open, and simultaneously controlling each tenth switch from closed to open; after the third switch and the tenth switch are switched from closed to open, controlling each fourth switch from open to closed, and simultaneously controlling each eleventh switch from open to closed; before the second switch and the ninth switch are opened to be closed, controlling each fifth switch to be closed to be opened, and simultaneously controlling each twelfth switch to be closed to be opened; after the fifth switch and the twelfth switch are closed to opened and before the second switch and the ninth switch are opened to closed, controlling the sixth switch of each first switch group to be opened to closed and simultaneously controlling each thirteenth switch to be opened to closed; after the fifth switch and the twelfth switch are closed to opened and before the sixth switch and the thirteenth switch are opened to closed, controlling each seventh switch to be closed to opened and simultaneously controlling each fourteenth switch to be closed to opened; before the fifth switch and the twelfth switch are switched from closed to open, the first vacuum switch is controlled to be switched from open to closed, and the second vacuum switch is controlled to be switched from open to closed; after the fifth switch and the twelfth switch are closed to opened and before the seventh switch and the fourteenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the sixth switch and the thirteenth switch are opened to closed and before the second switch and the ninth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the first switch and the eighth switch are switched from closed to open and before the third switch and the tenth switch are switched from closed to open, controlling the first vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the fourth switch and the eleventh switch are opened to be closed, the first vacuum switch is controlled to be opened to be closed, and meanwhile, the second vacuum switch is controlled to be opened to be closed.

As shown in fig. 4, which is a timing diagram of a capacity adjustment method for a transformer according to an embodiment of the present application, when the transformer is switched from a high capacity to a low capacity, the TRDA1, the TRDB1, the TRDC1, the TRGA8, the TRGB8, and the TRGC8 are controlled to be switched from closed to open, that is, the TRD1 and the TRG8 are controlled to be switched from closed to open; before the TRDs 1 and TRG8 are opened from closed, the TRDA2, TRDB2, TRDC2, TRGA9, TRGB9, TRGC9 are controlled from open to closed, that is, the TRDs 2 and TRG9 are controlled from open to closed; after TRD1 and TRG8 are switched from closed to open, TRDA3, TRDB3, TRDC3, TRGA10, TRGB10, TRGC10 are controlled from closed to open, that is, TRD3 and TRG10 are controlled from closed to open; after TRD3 and TRG10 are opened from closed to open, TRDA4, TRDB4, TRDC4, TRGA11, TRGB11, TRGC11 are controlled from open to closed, that is, TRD4 and TRG11 are controlled from open to closed; before the TRDs 2 and TRG9 are opened to closed, the TRDA5, TRDB5, TRDC5, TRGA12, TRGB12, TRGC12 are controlled to be opened from closed, that is, the TRDs 5 and TRG12 are controlled to be opened from closed; after TRD5 and TRG12 are opened from closed to open, and before TRD2 and TRG9 are opened from open to closed, controlling TRDA6, TRDB6, TRDC6, TRGA13, TRGB13, TRGC13 to be opened to closed, that is, controlling TRD6 and TRG13 to be opened to closed; after TRD5 and TRG12 are switched from closed to open, and before TRD6 and TRG13 are switched from open to closed, controlling TRDA7, TRDB7, TRDC7, TRGA14, TRGB14, TRGC14 from closed to open, that is, controlling TRD7 and TRG14 from closed to open;

before the TRDs 5 and TRG12 are switched from closed to open, the first vacuum switches DA1, DB1 and DC1 and the second vacuum switches GA2, GB2 and GC2 of each transformer switch group are controlled from open to closed, which are abbreviated as D1 switches and G2 switches in the figure; after the TRD5 and TRG12 are switched from closed to open, and before the TRD7 and TRG14 are switched from closed to open, controlling the D1 switch and the G2 switch from closed to open; after the TRD6 and TRG13 go from open to closed, and before the TRD2 and TRG9 go from open to closed, the D1 switch and the G2 switch are controlled from open to closed; after the TRD1 and TRG8 are switched from closed to open, and before the TRD3 and TRG10 are switched from closed to open, controlling the D1 switch and the G2 switch from closed to open; after the TRDs 4 and TRG11 go from open to closed, the D1 switch and the G2 switch are controlled from open to closed.

In the present embodiment, the switches are controlled by the mechanical linkage mechanism to sequentially operate according to the above-described timing, and after the switches of the transformer switch group are operated according to the above-described timing, the synchronous switching from the parallel connection to the series connection of the low-voltage side coil winding and the low-voltage side coil winding is completed, and the ratio of the large capacity to the small capacity before the capacity adjustment of the transformer to the small capacity after the capacity adjustment is 4 to 1.

According to the capacity regulating method for the transformer, the first switch of each first switch group is controlled to be switched on and off, and the eighth switch of each second switch group is controlled to be switched on and off; before the first switch and the eighth switch are opened from closing, controlling each second switch to be opened from closing, and simultaneously controlling each ninth switch to be opened from closing; after the first switch and the eighth switch are switched from closed to open, controlling each third switch from closed to open, and simultaneously controlling each tenth switch from closed to open; after the third switch and the tenth switch are switched from closed to open, controlling each fourth switch from open to closed, and simultaneously controlling each eleventh switch from open to closed; before the second switch and the ninth switch are opened to be closed, controlling each fifth switch to be closed to be opened, and simultaneously controlling each twelfth switch to be closed to be opened; after the fifth switch and the twelfth switch are closed to opened and before the second switch and the ninth switch are opened to closed, controlling the sixth switch of each first switch group to be opened to closed and simultaneously controlling each thirteenth switch to be opened to closed; after the fifth switch and the twelfth switch are closed to opened and before the sixth switch and the thirteenth switch are opened to closed, controlling each seventh switch to be closed to opened and simultaneously controlling each fourteenth switch to be closed to opened; before the fifth switch and the twelfth switch are switched from closed to open, the first vacuum switch is controlled to be switched from open to closed, and the second vacuum switch is controlled to be switched from open to closed; after the fifth switch and the twelfth switch are closed to opened and before the seventh switch and the fourteenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the sixth switch and the thirteenth switch are opened to closed and before the second switch and the ninth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the first switch and the eighth switch are switched from closed to open and before the third switch and the tenth switch are switched from closed to open, controlling the first vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the fourth switch and the eleventh switch are switched from open to closed, the first vacuum switch is controlled from open to closed, and the second vacuum switch is controlled from open to closed, so that the problem that a plurality of vacuum switch bulbs are required to be used in a vacuum on-load tap capacitance regulating switch group in the related art, and the manufacturing cost is high is solved. The capacity of the transformer switch group only comprising six vacuum switches is adjusted, so that the effects of reducing the number of vacuum bubbles and reducing the cost are achieved.

Optionally, in the method for regulating capacitance of a transformer provided in the embodiment of the present application, in a case that the transformer further includes a fifteenth switch respectively disposed between the first end of the second coil in the three sets of low-voltage side coil sets and the second end of the first vacuum switch of the first switch set, and a sixteenth switch respectively disposed between the first end of the fourth coil in the three sets of high-voltage side coil sets and the second end of the second vacuum switch of the second switch set, the method further includes: after the first vacuum switch and the second vacuum switch are closed to opened for the first time and before the seventh switch and the fourteenth switch are closed to opened, controlling the fifteenth switch to be closed to opened and simultaneously controlling the sixteenth switch to be closed to opened; after the first vacuum switch and the second vacuum switch are opened to closed for the last time, the fifteenth switch is controlled to be opened to closed, and the sixteenth switch is controlled to be opened to closed. As shown in fig. 4, after the D1 switch and the G2 switch are first turned from closed to open, and before the TRD7 and the TRG14 are turned from closed to open, the TRGA15, the TRGB15 and the TRGC15, the TRDA16, the TRDB16 and the TRDC16 are controlled from closed to open, that is, the TRD15 and the TRG16 are controlled from closed to open; after the D1 switch and the G2 switch were last first opened to closed, the TRD15 and the TRG16 were controlled to be opened to closed.

In addition, when the fifteenth switch and the sixteenth switch are opened, the first vacuum switch and the second vacuum switch are required to be matched to extinguish the arc of the fifteenth switch and the sixteenth switch, so that the first vacuum switch and the second vacuum switch of each transformer switch group are controlled to be opened from closed after the fifth switch and the twelfth switch are opened from closed to closed and before the fifteenth switch and the sixteenth switch are opened from closed to closed. As shown in fig. 4, the D1 switch and the G2 switch are controlled from closed to open after the TRD5 and the TRG12 are closed to open and before the TRD15 and the TRG16 are closed to open.

According to the embodiment of the application, another transformer capacity regulating method is provided and applied to the transformer.

The method comprises the following steps: controlling the first switch of each first switch group to be opened to be closed, and simultaneously controlling the eighth switch of each second switch group to be opened to be closed; after the first switch and the eighth switch are opened to closed, controlling each second switch to be closed to opened, and simultaneously controlling each ninth switch to be closed to opened; before the first switch and the eighth switch are opened to closed, controlling each third switch to be opened to closed, and simultaneously controlling each tenth switch to be opened to closed; before the third switch and the tenth switch are switched from open to closed, controlling each fourth switch from closed to open, and simultaneously controlling each eleventh switch from closed to open; after the second switch and the ninth switch are switched from closed to open, controlling each fifth switch from open to closed and simultaneously controlling each twelfth switch from closed to open; before the fifth switch and the twelfth switch are opened to be closed and after the ninth switch of the second switch is closed to be opened, controlling each sixth switch to be closed to be opened and simultaneously controlling each thirteenth switch to be closed to be opened; before the fifth switch and the twelfth switch are opened to closed and after the sixth switch and the thirteenth switch are closed to opened, controlling the seventh switch of each first switch group to be opened to closed and simultaneously controlling each fourteenth switch to be closed to opened; before the fourth switch and the eleventh switch are switched from closed to open, controlling the first vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the third switch and the tenth switch are opened to closed and before the first switch and the eighth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the second switch and the ninth switch are switched from closed to open and before the sixth switch and the thirteenth switch are switched from closed to open, controlling the vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the seventh switch and the fourteenth switch are opened to closed and before the fifth switch and the twelfth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the fifth switch and the twelfth switch are opened to be closed, the first vacuum switch is controlled to be closed to be opened, and meanwhile, the second vacuum switch is controlled to be closed to be opened.

In the method for regulating capacitance of a transformer provided in an embodiment of the present application, in a case that the transformer further includes a fifteenth switch respectively disposed between the first end of the second coil in the three sets of low-voltage side coil sets and the second end of the first vacuum switch of the first switch set, and a sixteenth switch respectively disposed between the first end of the fourth coil in the three sets of high-voltage side coil sets and the second end of the second vacuum switch of the second switch set, the method further includes: the fifteenth switch is controlled from closed to open while the sixteenth switch is controlled from closed to open before the first and second vacuum switches are first closed to open, the fifteenth switch is controlled from open to closed while the sixteenth switch is controlled from open to closed before the first and second vacuum switches are last open to closed, and after the seventh and fourteenth switches are open to closed.

As shown in fig. 4, which is a timing diagram of a transformer capacitance adjusting method according to an embodiment of the present application, when a transformer is switched from a low capacitance to a high capacitance, the transformer is operated from right to left, and after each switch of a transformer switch group is operated according to the above timing, synchronous switching of a low-voltage side coil winding and a low-voltage side coil winding from series connection to parallel connection is completed, and a ratio of large and small capacitances before and after the transformer capacitance adjustment is 1: 4.

According to the capacity regulating method for the transformer, the first switch of each first switch group is controlled to be switched off to be switched on, and the eighth switch of each second switch group is controlled to be switched off to be switched on; after the first switch and the eighth switch are opened to closed, controlling each second switch to be closed to opened, and simultaneously controlling each ninth switch to be closed to opened; before the first switch and the eighth switch are opened to closed, controlling each third switch to be opened to closed, and simultaneously controlling each tenth switch to be opened to closed; before the third switch and the tenth switch are switched from open to closed, controlling each fourth switch from closed to open, and simultaneously controlling each eleventh switch from closed to open; after the second switch and the ninth switch are switched from closed to open, controlling each fifth switch from open to closed and simultaneously controlling each twelfth switch from closed to open; before the fifth switch and the twelfth switch are opened to be closed and after the ninth switch of the second switch is closed to be opened, controlling each sixth switch to be closed to be opened and simultaneously controlling each thirteenth switch to be closed to be opened; before the fifth switch and the twelfth switch are opened to closed and after the sixth switch and the thirteenth switch are closed to opened, controlling the seventh switch of each first switch group to be opened to closed and simultaneously controlling each fourteenth switch to be closed to opened; before the fourth switch and the eleventh switch are switched from closed to open, controlling the first vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the third switch and the tenth switch are opened to closed and before the first switch and the eighth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the second switch and the ninth switch are switched from closed to open and before the sixth switch and the thirteenth switch are switched from closed to open, controlling the vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the seventh switch and the fourteenth switch are opened to closed and before the fifth switch and the twelfth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the fifth switch and the twelfth switch are switched from off to on, the first vacuum switch is controlled from on to off, and the second vacuum switch is controlled from on to off, so that the problems that a plurality of vacuum switch bulbs are required to be used in a vacuum on-load tap capacitance-regulating switch group in the related art, and the manufacturing cost is high are solved. The capacity of the transformer switch group only comprising six vacuum switches is adjusted, so that the effects of reducing the number of vacuum bubbles and reducing the cost are achieved.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

The embodiment of the present application further provides a transformer capacitance adjusting device, and it should be noted that the transformer capacitance adjusting device of the embodiment of the present application may be used to execute the transformer capacitance adjusting method provided by the embodiment of the present application. The following describes a transformer capacitance adjusting device provided in an embodiment of the present application.

Fig. 5 is a schematic diagram of a transformer capacitance adjusting device according to an embodiment of the application. As shown in fig. 5, the apparatus includes: a first control unit 51, a second control unit 52, a third control unit 53, a fourth control unit 54, a fifth control unit 55, a sixth control unit 56, a seventh control unit 57, and an eighth control unit 58.

Specifically, a first control unit 51 for controlling the first switch of each first switch group from closed to open, and simultaneously controlling the eighth switch of each second switch group from closed to open;

a second control unit 52 for controlling each second switch from open to closed and simultaneously controlling each ninth switch from open to closed before the first switch and the eighth switch from closed to open;

a third control unit 53 for controlling each third switch from closed to open and simultaneously controlling each tenth switch from closed to open after the first switch and the eighth switch from closed to open;

a fourth control unit 54 for controlling each fourth switch from open to closed and simultaneously controlling each eleventh switch from open to closed after the third switch and the tenth switch from closed to open;

a fifth control unit 55 for controlling each fifth switch from closed to open and simultaneously controlling each twelfth switch from closed to open before the second switch and the ninth switch from open to closed;

a sixth control unit 56 for controlling the sixth switch of each first switch group to be opened to closed and simultaneously controlling each thirteenth switch to be opened to closed after the fifth switch and the twelfth switch are closed to be opened and before the second switch and the ninth switch are opened to be closed;

a seventh control unit 57, configured to control each seventh switch to be closed to be opened, and simultaneously control each fourteenth switch to be closed to be opened, after the fifth switch and the twelfth switch are closed to be opened, and before the sixth switch and the thirteenth switch are opened to be closed;

an eighth control unit 58 for controlling the first vacuum switch from open to closed and simultaneously controlling the second vacuum switch from open to closed before the fifth switch and the twelfth switch from closed to open; after the fifth switch and the twelfth switch are closed to opened and before the seventh switch and the fourteenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the sixth switch and the thirteenth switch are opened to closed and before the second switch and the ninth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the first switch and the eighth switch are switched from closed to open and before the third switch and the tenth switch are switched from closed to open, controlling the first vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the fourth switch and the eleventh switch are opened to be closed, the first vacuum switch is controlled to be opened to be closed, and meanwhile, the second vacuum switch is controlled to be opened to be closed.

In the capacitance adjusting device for the transformer provided by the embodiment of the application, the first control unit 51 controls the first switch of each first switch group to be switched on and off, and controls the eighth switch of each second switch group to be switched on and off; a second control unit 52 that controls each second switch from open to closed while controlling each ninth switch from open to closed before the first switch and the eighth switch from closed to open; a third control unit 53 that controls each third switch from closed to open, and simultaneously controls each tenth switch from closed to open, after the first switch and the eighth switch are closed to open; a fourth control unit 54 that controls each fourth switch from open to closed while controlling each eleventh switch from open to closed after the third switch and the tenth switch from closed to open; a fifth control unit 55 for controlling each fifth switch from closed to open and simultaneously controlling each twelfth switch from closed to open before the second switch and the ninth switch from open to closed; a sixth control unit 56 that controls the sixth switch of each first switch group to be opened to closed and simultaneously controls each thirteenth switch to be opened to closed after the fifth switch and the twelfth switch are closed to opened and before the second switch and the ninth switch are opened to closed; a seventh control unit 57 that controls each seventh switch from closed to open, and simultaneously controls each fourteenth switch from closed to open, after the fifth switch and the twelfth switch are closed to open, and before the sixth switch and the thirteenth switch are opened to closed; an eighth control unit 58 which controls the first vacuum switch to be opened to be closed and simultaneously controls the second vacuum switch to be opened to be closed before the fifth switch and the twelfth switch are closed to be opened; after the fifth switch and the twelfth switch are closed to opened and before the seventh switch and the fourteenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the sixth switch and the thirteenth switch are opened to closed and before the second switch and the ninth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the first switch and the eighth switch are switched from closed to open and before the third switch and the tenth switch are switched from closed to open, controlling the first vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the fourth switch and the eleventh switch are switched on and off, the first vacuum switch is controlled to be switched on and off, and the second vacuum switch is controlled to be switched on and off, so that the problems that a plurality of vacuum switch bubbles are needed to be used in a vacuum on-load tap capacitance regulating switch group in the related art and the manufacturing cost is high are solved, and the capacitance is regulated by using a transformer switch group only comprising six vacuum switches, so that the effects of reducing the number of the vacuum bubbles and reducing the cost are achieved.

Optionally, in the capacitance adjusting apparatus for a transformer provided in an embodiment of the present application, in a case that the transformer further includes a fifteenth switch respectively disposed between the first end of the second coil in the three sets of low-voltage side coil sets and the second end of the first vacuum switch of the first switch set, and a sixteenth switch respectively disposed between the first end of the fourth coil in the three sets of high-voltage side coil sets and the second end of the second vacuum switch of the second switch set, the apparatus further includes: after the first vacuum switch and the second vacuum switch are closed to opened for the first time and before the seventh switch and the fourteenth switch are closed to opened, controlling the fifteenth switch to be closed to opened and simultaneously controlling the sixteenth switch to be closed to opened; after the first vacuum switch and the second vacuum switch are opened to closed for the last time, the fifteenth switch is controlled to be opened to closed, and the sixteenth switch is controlled to be opened to closed.

The transformer capacity regulating device comprises a processor and a memory, wherein the first control unit 51, the second control unit 52, the third control unit 53, the fourth control unit 54, the fifth control unit 55, the sixth control unit 56, the seventh control unit 57, the eighth control unit 58 and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

Fig. 6 is a schematic diagram of a transformer capacitance adjusting device according to an embodiment of the application. As shown in fig. 6, the apparatus includes: a ninth control unit 61, a tenth control unit 62, an eleventh control unit 63, a twelfth control unit 64, a thirteenth control unit 65, a fourteenth control unit 66, a fifteenth control unit 67, a sixteenth control unit 68.

Specifically, a ninth control unit 61 for controlling the first switch of each first switch group to be opened to closed, and simultaneously controlling the eighth switch of each second switch group to be opened to closed;

a tenth control unit 62 for controlling each second switch from closed to open, and simultaneously controlling each ninth switch from closed to open, after the first switch and the eighth switch are closed from open to closed;

an eleventh control unit 63 for controlling each third switch from open to closed while controlling each tenth switch from open to closed before the first switch and the eighth switch from open to closed;

a twelfth control unit 64 for controlling each fourth switch from closed to open and simultaneously controlling each eleventh switch from closed to open before the third switch and the tenth switch from open to closed;

a thirteenth control unit 65 for controlling each fifth switch from open to closed and simultaneously controlling each twelfth switch from closed to open after the second switch and the ninth switch from closed to open;

a fourteenth control unit 66 for controlling each sixth switch from closed to open and simultaneously controlling each thirteenth switch from closed to open before the fifth switch and the twelfth switch from open to closed and after the ninth switch of the second switch from closed to open;

a fifteenth control unit 67 for controlling the seventh switch of each first switch group from open to closed and simultaneously controlling each fourteenth switch from closed to open before the fifth switch and the twelfth switch are opened to closed and after the sixth switch and the thirteenth switch are closed to opened;

a sixteenth control unit 68 for controlling the first vacuum switch from closed to open and simultaneously controlling the second vacuum switch from closed to open before the fourth switch and the eleventh switch from closed to open; after the third switch and the tenth switch are opened to closed and before the first switch and the eighth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the second switch and the ninth switch are switched from closed to open and before the sixth switch and the thirteenth switch are switched from closed to open, controlling the vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the seventh switch and the fourteenth switch are opened to closed and before the fifth switch and the twelfth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the fifth switch and the twelfth switch are opened to be closed, the first vacuum switch is controlled to be closed to be opened, and meanwhile, the second vacuum switch is controlled to be closed to be opened.

According to the transformer capacitance adjusting device provided by the embodiment of the application, the ninth control unit 61 is used for controlling the first switch of each first switch group to be switched off and the eighth switch of each second switch group to be switched off and on; a tenth control unit 62 that controls each second switch from closed to open, and simultaneously controls each ninth switch from closed to open, after the first switch and the eighth switch are closed from open to closed; an eleventh control unit 63 which controls each third switch from open to closed and simultaneously controls each tenth switch from open to closed before the first switch and the eighth switch from open to closed; a twelfth control unit 64 that controls each fourth switch from closed to open while controlling each eleventh switch from closed to open before the third switch and the tenth switch from open to closed; a thirteenth control unit 65 that controls each fifth switch from open to close while controlling each twelfth switch from close to open after the second switch and the ninth switch from close to open; a fourteenth control unit 66 for controlling each sixth switch from closed to open and simultaneously controlling each thirteenth switch from closed to open before the fifth switch and the twelfth switch from open to closed and after the ninth switch of the second switch from closed to open; a fifteenth control unit 67 for controlling the seventh switch of each first switch group from open to close and simultaneously controlling each fourteenth switch from close to open before the fifth switch and the twelfth switch from open to close and after the sixth switch and the thirteenth switch from close to open; a sixteenth control unit 68 for controlling the first vacuum switch from closed to open and simultaneously controlling the second vacuum switch from closed to open before the fourth switch and the eleventh switch from closed to open; after the third switch and the tenth switch are opened to closed and before the first switch and the eighth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the second switch and the ninth switch are switched from closed to open and before the sixth switch and the thirteenth switch are switched from closed to open, controlling the vacuum switch to be switched from closed to open and simultaneously controlling the second vacuum switch to be switched from closed to open; after the seventh switch and the fourteenth switch are opened to closed and before the fifth switch and the twelfth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the fifth switch and the twelfth switch are switched on from off, the first vacuum switch is controlled to be switched off from on, and the second vacuum switch is controlled to be switched off from on, so that the problems that in the related art, a plurality of vacuum switch bubbles are needed to be used in a vacuum on-load tap capacitance regulating switch group, and the manufacturing cost is high are solved, and the capacitance is regulated by using a transformer switch group only comprising six vacuum switches, so that the effects of reducing the number of the vacuum bubbles and reducing the cost are achieved.

Optionally, in the capacitance adjusting apparatus for a transformer provided in an embodiment of the present application, in a case that the transformer further includes a fifteenth switch respectively disposed between the first end of the second coil in the three sets of low-voltage side coil sets and the second end of the first vacuum switch of the first switch set, and a sixteenth switch respectively disposed between the first end of the fourth coil in the three sets of high-voltage side coil sets and the second end of the second vacuum switch of the second switch set, the apparatus further includes: the fifteenth switch is controlled from closed to open while the sixteenth switch is controlled from closed to open before the first and second vacuum switches are first closed to open, the fifteenth switch is controlled from open to closed while the sixteenth switch is controlled from open to closed before the first and second vacuum switches are last open to closed, and after the seventh and fourteenth switches are open to closed.

The tenth control unit 61, the eleventh control unit 62, the twelfth control unit 63, the thirteenth control unit 64, the fourteenth control unit 65, the fifteenth control unit 66, the sixteenth control unit 67, the seventeenth control unit 68, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A transformer switch block, comprising:

the first switch group is arranged on the low-voltage side of the transformer, and the second switch group is arranged on the high-voltage side of the transformer;

wherein the first switch group includes: the vacuum switch comprises a first vacuum switch, a second vacuum switch and a control circuit, wherein the first vacuum switch is arranged at a first end of the first vacuum switch, and the second vacuum switch is arranged at a second end of the first vacuum switch; a third switch disposed between a first end of the first vacuum switch and a first end of the first coil at a low voltage side; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil at the low voltage side; a first transition resistor disposed between a second terminal of the first vacuum switch and a first terminal of the second coil; a fifth switch disposed between the first end of the first coil and the first end of the second coil; a sixth switch disposed between the first end of the first coil and the second end of the second coil; a seventh switch disposed between the second end of the first coil and the second end of the second coil;

the second switch group includes: the first end of the second vacuum switch is provided with a ninth switch; a tenth switch disposed between the first end of the second vacuum switch and the first end of the third coil on the high voltage side; an eleventh switch disposed between a first end of the second vacuum switch and a first end of the fourth coil on the high voltage side; a second transition resistor disposed between a second end of the second vacuum switch and a first end of the fourth coil; a twelfth switch disposed between the first end of the third coil and the first end of the fourth coil; a thirteenth switch disposed between the first end of the third coil and the second end of the fourth coil; a fourteenth switch disposed between the second end of the third coil and the second end of the fourth coil.

2. The transformer switch bank of claim 1, further comprising:

a fifteenth switch disposed between the second end of the first vacuum switch and the first end of the second coil;

a sixteenth switch disposed between the second end of the second vacuum switch and the first end of the fourth coil.

3. A transformer comprising the transformer switch bank of claim 1, comprising:

the three groups of low-voltage side coil groups are arranged on the low-voltage side of the iron core, and the first switch group is arranged between each group of low-voltage side coil groups and a low-voltage neutral point, wherein each group of low-voltage side coil groups comprises two groups of coils, the first switch of the first switch group is arranged between the first end of the first vacuum switch and the low-voltage neutral point, and the second switch of the first switch group is arranged between the second end of the first vacuum switch and the low-voltage neutral point;

three high-voltage side coil assemblies of group set up the high-voltage side at the iron core, the second switch group sets up between every high-voltage side coil assembly of group and phase line, wherein, every high-voltage side coil assembly of group includes two sets of coils, the eighth switch setting of second switch group is in between the first end and the phase line of second vacuum switch, the ninth switch setting of second switch group is in between the second end and the phase line of second vacuum switch.

4. The transformer of claim 3, further comprising:

fifteenth switches respectively arranged between the first ends of the second coils in the three groups of low-voltage side coil groups and the second ends of the first vacuum switches of the first switch group;

and sixteenth switches are respectively arranged between the first ends of the fourth coils in the three groups of high-voltage side coil groups and the second ends of the second vacuum switches of the second switch group.

5. A transformer capacity regulating method applied to the transformer of claim 3, comprising:

controlling the first switch of each of the first switch groups to be closed to open, and simultaneously controlling the eighth switch of each of the second switch groups to be closed to open;

before the first switch and the eighth switch are opened from being closed, controlling each second switch to be opened from being closed, and simultaneously controlling each ninth switch to be opened from being closed;

after the first switch and the eighth switch are switched from closed to open, controlling each third switch from closed to open, and simultaneously controlling each tenth switch from closed to open;

after the third switch and the tenth switch are switched from closed to open, controlling each fourth switch to be switched from open to closed, and simultaneously controlling each eleventh switch to be switched from open to closed;

before the second switch and the ninth switch are opened to be closed, controlling each fifth switch to be closed to be opened, and simultaneously controlling each twelfth switch to be closed to be opened;

after the fifth switch and the twelfth switch are opened from being closed to being opened and before the second switch and the ninth switch are opened from being closed to being closed, controlling the sixth switch of each first switch group to be opened to being closed and simultaneously controlling each thirteenth switch to be opened to being closed;

after the fifth switch and the twelfth switch are closed to opened and before the sixth switch and the thirteenth switch are opened to closed, controlling each seventh switch to be closed to opened and simultaneously controlling each fourteenth switch to be closed to opened;

controlling the first vacuum switch to open to close while controlling the second vacuum switch to open to close before the fifth switch and the twelfth switch are closed to open; after the fifth switch and the twelfth switch are closed to opened and before the seventh switch and the fourteenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the sixth switch and the thirteenth switch are opened to closed and before the second switch and the ninth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the first switch and the eighth switch are closed to opened and before the third switch and the tenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the fourth switch and the eleventh switch are opened to closed, the first vacuum switch is controlled to be opened to closed, and the second vacuum switch is controlled to be opened to closed.

6. The method of claim 5, wherein in the case that the transformer further comprises a fifteenth switch disposed between the first ends of the second coils of the three sets of low side coil sets and the second end of the first vacuum switch of the first switch set, respectively, and a sixteenth switch disposed between the first ends of the fourth coils of the three sets of high side coil sets and the second end of the second vacuum switch of the second switch set, respectively, the method further comprises:

after the first vacuum switch and the second vacuum switch are first turned on to off and before the seventh switch and the fourteenth switch are turned on to off, controlling the fifteenth switch to be turned on to off while controlling the sixteenth switch to be turned on to off; after the first vacuum switch and the second vacuum switch are opened to closed for the last time, controlling the fifteenth switch to be opened to closed and simultaneously controlling the sixteenth switch to be opened to closed.

7. A transformer capacity regulating method applied to the transformer of claim 3, comprising:

controlling the first switch of each of the first switch groups to open to close, while controlling the eighth switch of each of the second switch groups to open to close;

after the first switch and the eighth switch are opened to be closed, controlling each second switch to be closed to be opened, and simultaneously controlling each ninth switch to be closed to be opened;

controlling each of the third switches from open to closed while controlling each of the tenth switches from open to closed before the first switch and the eighth switch from open to closed;

before the third switch and the tenth switch are opened to be closed, controlling each fourth switch to be closed to be opened, and simultaneously controlling each eleventh switch to be closed to be opened;

after the second switch and the ninth switch are switched from closed to open, controlling each fifth switch to be switched from open to closed, and simultaneously controlling each twelfth switch to be switched from closed to open;

before the fifth switch and the twelfth switch are opened to be closed and after the second switch and the ninth switch are closed to be opened, controlling each sixth switch to be closed to be opened and simultaneously controlling each thirteenth switch to be closed to be opened;

before the fifth switch and the twelfth switch are opened to closed and after the sixth switch and the thirteenth switch are closed to opened, controlling the seventh switch of each of the first switch groups to be opened to closed and simultaneously controlling each of the fourteenth switches to be closed to opened;

controlling the first vacuum switch from closed to open while controlling the second vacuum switch from closed to open before the fourth switch and the eleventh switch from closed to open; after the third switch and the tenth switch are opened to closed and before the first switch and the eighth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the second switch and the ninth switch are closed to opened and before the sixth switch and the thirteenth switch are closed to opened, controlling the vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the seventh switch and the fourteenth switch are opened to closed and before the fifth switch and the twelfth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the fifth switch and the twelfth switch are closed from the open state, controlling the first vacuum switch to be closed to the open state and simultaneously controlling the second vacuum switch to be closed to the open state.

8. The method of claim 7, wherein in the case that the transformer further comprises a fifteenth switch disposed between the first ends of the second coils of the three sets of low side coil sets and the second end of the first vacuum switch of the first switch set, respectively, and a sixteenth switch disposed between the first ends of the fourth coils of the three sets of high side coil sets and the second end of the second vacuum switch of the second switch set, respectively, the method further comprises:

controlling the fifteenth switch from closed to open while controlling the sixteenth switch from closed to open before the first vacuum switch and the second vacuum switch are first closed to open, controlling the fifteenth switch from open to closed while controlling the sixteenth switch from open to closed before the first vacuum switch and the second vacuum switch are last closed from open to closed, and after the seventh switch and the fourteenth switch are closed from open to closed.

9. A transformer capacity regulating device applied to the transformer of claim 3, comprising:

a first control unit for controlling the first switch of each first switch group from closed to open, and simultaneously controlling the eighth switch of each second switch group from closed to open;

a second control unit for controlling each of the second switches from open to closed and simultaneously controlling each of the ninth switches from open to closed before the first switch and the eighth switch from closed to open;

a third control unit for controlling each of the third switches from closed to open and simultaneously controlling each of the tenth switches from closed to open after the first switch and the eighth switch are closed to open;

a fourth control unit for controlling each of the fourth switches from open to closed and simultaneously controlling each of the eleventh switches from open to closed after the third switch and the tenth switch are closed to open;

a fifth control unit for controlling each of the fifth switches from closed to open and simultaneously controlling each of the twelfth switches from closed to open before the second switch and the ninth switch are opened to closed;

a sixth control unit for controlling the sixth switch of each of the first switch groups to be opened to closed and simultaneously controlling each of the thirteenth switches to be opened to closed after the fifth switch and the twelfth switch are closed to opened and before the second switch and the ninth switch are opened to closed;

a seventh control unit, configured to control each seventh switch to be turned on to turned off after the fifth switch and the twelfth switch are turned on to turned off and before the sixth switch and the thirteenth switch are turned on to turned off, and simultaneously control each fourteenth switch to be turned on to turned off;

an eighth control unit for controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed before the fifth switch and the twelfth switch are closed to opened; after the fifth switch and the twelfth switch are closed to opened and before the seventh switch and the fourteenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the sixth switch and the thirteenth switch are opened to closed and before the second switch and the ninth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the first switch and the eighth switch are closed to opened and before the third switch and the tenth switch are closed to opened, controlling the first vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the fourth switch and the eleventh switch are opened to closed, the first vacuum switch is controlled to be opened to closed, and the second vacuum switch is controlled to be opened to closed.

10. A transformer capacity regulating device applied to the transformer of claim 3, comprising:

a ninth control unit for controlling the first switch of each first switch group to be opened to closed and simultaneously controlling the eighth switch of each second switch group to be opened to closed;

a tenth control unit for controlling each of the second switches from closed to open and simultaneously controlling each of the ninth switches from closed to open after the first switch and the eighth switch are closed from open to closed;

an eleventh control unit for controlling each of the third switches to be opened to closed and simultaneously controlling each of the tenth switches to be opened to closed before the first switch and the eighth switch are opened to closed;

a twelfth control unit, configured to control each of the fourth switches to be closed to be opened, and simultaneously control each of the eleventh switches to be closed to be opened, before the third switch and the tenth switch are closed from being opened to being closed;

a thirteenth control unit for controlling each of the fifth switches from open to closed and simultaneously controlling each of the twelfth switches from closed to open after the second switch and the ninth switch are closed to open;

a fourteenth control unit, configured to control each of the sixth switches to be closed to be opened while controlling each of the thirteenth switches to be closed to be opened, before the fifth switch and the twelfth switch are closed to be opened, and after the ninth switch of the second switch is closed to be opened;

a fifteenth control unit, configured to control the seventh switch of each of the first switch groups to be opened to closed and simultaneously control each of the fourteenth switches to be closed to opened before the fifth switch and the twelfth switch are opened to closed and after the sixth switch and the thirteenth switch are closed to opened;

a sixteenth control unit for controlling the first vacuum switch to be closed to be opened and simultaneously controlling the second vacuum switch to be closed to be opened before the fourth switch and the eleventh switch are closed to be opened; after the third switch and the tenth switch are opened to closed and before the first switch and the eighth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the second switch and the ninth switch are closed to opened and before the sixth switch and the thirteenth switch are closed to opened, controlling the vacuum switch to be closed to opened and simultaneously controlling the second vacuum switch to be closed to opened; after the seventh switch and the fourteenth switch are opened to closed and before the fifth switch and the twelfth switch are opened to closed, controlling the first vacuum switch to be opened to closed and simultaneously controlling the second vacuum switch to be opened to closed; after the fifth switch and the twelfth switch are closed from the open state, controlling the first vacuum switch to be closed to the open state and simultaneously controlling the second vacuum switch to be closed to the open state.