CN109637858B - Transformer switch group, transformer, and capacity adjusting method and device of transformer - Google Patents
Transformer switch group, transformer, and capacity adjusting method and device of transformer Download PDFInfo
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- CN109637858B CN109637858B CN201811519321.7A CN201811519321A CN109637858B CN 109637858 B CN109637858 B CN 109637858B CN 201811519321 A CN201811519321 A CN 201811519321A CN 109637858 B CN109637858 B CN 109637858B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/56—Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0027—Operating mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0038—Tap change devices making use of vacuum switches
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Coils Of Transformers For General Uses (AREA)
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 vacuum circuit comprises a second vacuum switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch and a second 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
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 capacity regulation of the 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 bubbles are needed to be used in a vacuum on-load 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, a capacity regulating method and a capacity regulating device of the transformer, and aims to solve the problems that in the related art, a plurality of vacuum bubbles are needed to be used in a vacuum on-load 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 a first end of the first vacuum switch and a first end of the first coil in the low-voltage side coil set of the transformer; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil in the low side coil assembly; 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; the tenth switch is arranged between the first end of the second vacuum switch and the phase line of the transformer; the eleventh switch is arranged between the first end of the second vacuum switch and the high-voltage neutral point; and the second transition resistor is arranged between the second end of the second vacuum switch and the high-voltage neutral point.
Further, the first switch group further includes: and the twelfth switch is arranged between the second end of the first vacuum switch and the first end of the second 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, each group of low-voltage side coil groups comprises three groups of coils, a third coil in each low-voltage side coil group is arranged between the second end of the first coil and the phase line, and a first switch group is arranged between each group of low-voltage side coil groups and a low-voltage neutral point, wherein a 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 a second switch of the first switch group is arranged between the second end of the first vacuum switch and the low-voltage neutral point; the three groups of high-voltage side coil groups are arranged on the high-voltage side of the iron core, each group of high-voltage side coil group comprises a group of coils, the first end of the second switch group is connected with the first end of one group of coils, the second end of the second switch group is connected with the second end of the adjacent group of coils, the third end of the second switch group is connected to a high-voltage neutral point, the eighth switch of the second switch group is arranged between the first end of the second vacuum switch and the first end of the high-voltage side coil group, and the ninth switch of the second switch group is arranged between the second end of the second vacuum switch and the first end of the high-voltage side coil group.
Further, the transformer further comprises: and the twelfth switches are 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.
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, each fifth switch is controlled to be closed to be opened; after the fifth switch is switched from closed to open and before the second switch and the ninth switch are switched from open to closed, controlling each sixth switch to be switched from open to closed; after the fifth switches are closed to opened and before the sixth switches are opened to closed, controlling each seventh switch to be closed to opened; controlling the first vacuum switch from open to closed before the fifth switch from closed to open; after the fifth switch is closed to opened and before the seventh switch is closed to opened, controlling the first vacuum switch to be closed to opened; after the sixth switch is 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 a case where the transformer further includes twelfth switches respectively provided between the first ends of the second coils in the three groups of low-voltage side coil groups and the first vacuum switch of the first switch group, the method further includes: controlling the twelfth switch from closed to open after the first vacuum switch is first closed to open and before the seventh switch is closed to open; and after the first vacuum switch and the second vacuum switch are opened to closed for the last time, controlling the twelfth switch 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, each fifth switch is controlled from open to closed; before the fifth switch is opened to closed and after the second switch and the ninth switch are closed to opened, controlling each sixth switch to be closed to opened; before the fifth switch is opened to closed and after the sixth switch is closed to opened, controlling each seventh switch to be opened to closed; 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 is 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 seventh switch is opened to closed and before the fifth switch is opened to closed, controlling the first vacuum switch to be opened to closed; after the fifth switch is opened to closed, the first vacuum switch is controlled to be opened to closed.
Further, in a case where the transformer further includes twelfth switches respectively provided between the first ends of the second coils in the three groups of low-voltage side coil groups and the first vacuum switch of the first switch group, the method further includes: the twelfth switch is controlled from closed to open before the first vacuum switch and the second vacuum switch are first closed to open, before the first vacuum switch is last open to closed, and after the seventh switch is 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 before the second switch and the ninth switch from open to closed; a sixth control unit for controlling each sixth switch from open to closed after the fifth switch is from closed to open and before the second switch and the ninth switch are from open to closed; a seventh control unit for controlling each seventh switch from closed to open after the fifth switch is closed to open and before the sixth switch is opened to closed; an eighth control unit for controlling the first vacuum switch from open to closed before the fifth switch from closed to open; after the fifth switch is closed to opened and before the seventh switch is closed to opened, controlling the first vacuum switch to be closed to opened; after the sixth switch is 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, a 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 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 before the fifth switch is opened to closed and after the second switch and the ninth switch are closed to opened; a fifteenth control unit for controlling each seventh switch from open to closed before the fifth switch is opened to closed and after the sixth switch is 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 switched from closed to open and before the sixth switch is 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 seventh switch is opened to closed and before the fifth switch is opened to closed, controlling the first vacuum switch to be opened to closed; after the fifth switch is opened to closed, the first vacuum switch is controlled to be opened to closed.
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 a first end of the first vacuum switch and a first end of the first coil in the low-voltage side coil set of the transformer; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil in the low side coil assembly; 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; the tenth switch is arranged between the first end of the second vacuum switch and the phase line of the transformer; the eleventh switch is arranged between the first end of the second vacuum switch and the high-voltage neutral point; the second transition resistor is arranged between the second end of the second vacuum switch and the high-voltage neutral point, and the problems that a plurality of vacuum bubbles are needed to be used in a vacuum on-load capacity-regulating switch group in the related technology 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 a first end of the first vacuum switch and a first end of the first coil in the low-voltage side coil set of the transformer; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil in the low side coil assembly; 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; the tenth switch is arranged between the first end of the second vacuum switch and the phase line of the transformer; the eleventh switch is arranged between the first end of the second vacuum switch and the high-voltage neutral point; and the second transition resistor is arranged between the second end of the second vacuum switch and the high-voltage neutral point.
It should be noted that, in the transformer capacitance adjusting process, the transformer switch group in this embodiment is used, and switching of the connection mode of the transformer coil winding is realized by changing the on-off state of each switch of the switch group, so as to adjust 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: the first switch group further includes: and the twelfth switch is arranged between the second end of the first vacuum switch and the first end of the second coil.
It should be noted that, in the use process of the transformer switch group, after the fifth switch is verified through tests to be turned off, whether the high-voltage side parallel winding or the low-voltage side parallel winding of the transformer generates an arc or not is verified, and if the arc is generated, the twelfth 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.
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 a first end of the first vacuum switch and a first end of the first coil in the low-voltage side coil set of the transformer; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil in the low side coil assembly; 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; the tenth switch is arranged between the first end of the second vacuum switch and the phase line of the transformer; the eleventh switch is arranged between the first end of the second vacuum switch and the high-voltage neutral point; the second transition resistor is arranged between the second end of the second vacuum switch and the high-voltage neutral point, and the problems that a plurality of vacuum bubbles are needed to be used in a vacuum on-load capacity-regulating switch group in the related technology 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, each group of low-voltage side coil group comprises three groups of coils, a third coil in the low-voltage side coil group is arranged between the second end of the first coil and the phase line, the first switch group is arranged between each group of low-voltage side coil group and a low-voltage neutral point, 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 diagram of the low-voltage side coil and the first switch group of the transformer provided in the embodiment of the present application is shown, in the three groups of transformer switch groups, the first vacuum switch is respectively represented as DA1, DB1 and DC1, the first switch TRDA1, TRDB1 and TRDC1, the second switch is respectively represented as TRDA2, TRDB2 and TRDC2, the switching between the transformer switch group 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 the open state, the third switch is respectively represented as TRDA3, TRDB3 and TRDC3, the fourth switch is respectively represented as TRDA4, TRDB4 and TRDC 3584, it should be noted that the third switch and the fourth switch cannot be simultaneously in the closed state, the fifth switch is respectively represented as TRDA5, TRDB5 and TRDC5, the sixth switch is respectively represented as TRDA 58375, TRDA6, the sixth switch is respectively represented as TRDA6 and TRDA 57324, The TRDB7 and the TRDC7 are such that the sixth switch and the seventh switch cannot be simultaneously closed, the first transition resistors are represented by DRA1, DRB1, and DRC1, the first coils are represented by TA1, TB1, and TC1, the second coils are represented by TA2, TB2, and TC2, the third coils are represented by TA3, TB3, and TC3, and the low-voltage neutral point is represented by a DC point in the drawing.
The three groups of high-voltage side coil groups are arranged on the high-voltage side of the iron core, each group of high-voltage side coil group comprises a group of coils, the first end of the second switch group is connected with the first end of one group of coils, the second end of the second switch group is connected with the second end of the adjacent group of coils, the third end of the second switch group is connected to a high-voltage neutral point, the eighth switch of the second switch group is arranged between the first end of the second vacuum switch and the first end of the high-voltage side coil group, and the ninth switch of the second switch group is arranged between the second end of the second vacuum switch and the first end of the high-voltage side coil group.
As shown in fig. 3, the schematic diagram of the high-voltage side coil and the second switch group of the transformer provided in the embodiment of the present application is shown, in the three groups of transformer switch groups, the second vacuum switch is respectively represented as GA2, GB2 and GC2, the eighth switch is respectively represented as TRGA8, TRGB8 and TRGC8, the ninth switch is respectively represented as TRGA9, TRGB9 and TRGC9, the eighth switch or the ninth switch is used to make and break the coil, it should be noted 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 should be noted that the tenth switch and the eleventh switch cannot be simultaneously in a closed state, the second transition resistance is respectively represented as GRA2, GRB2 and GRC2, and the high-voltage neutral point is shown in the high-voltage point diagram.
Optionally, the transformer provided in the embodiment of the present application further includes: and the twelfth switches are 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.
As shown in fig. 2, among the three groups of transformer switches on the low-voltage side, twelfth switches are provided as TRDA12, TRDB12, and TRDC12, respectively. Through this embodiment, guaranteed that the electric arc can normally extinguish after the fifth switch disconnection. Through this embodiment, guaranteed that the arc can not produce after the fifth switch directly breaks off.
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 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, each fifth switch is controlled to be closed to be opened; after the fifth switch is switched from closed to open and before the second switch and the ninth switch are switched from open to closed, controlling each sixth switch to be switched from open to closed; after the fifth switches are closed to opened and before the sixth switches are opened to closed, controlling each seventh switch to be closed to opened; controlling the first vacuum switch from open to closed before the fifth switch from closed to open; after the fifth switch is closed to opened and before the seventh switch is closed to opened, controlling the first vacuum switch to be closed to opened; after the sixth switch is 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 modulation 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 opened from closed, that is, the TRD1 and the TRG8 are controlled to be opened from closed; 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, TRDB3, TRGA10, TRGB10, TRGB10 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, TRDB4, TRGA11, TRGB11, TRGB11 are controlled from open to closed, that is, TRD4 and TRG11 are controlled from open to closed; before TRD2 and TRG9 go from open to closed, TRDA5, TRDB5, TRDC5 are controlled from closed to open, i.e., TRD5 is controlled from closed to open; after TRD5 goes from closed to open, and before TRD2 and TRG9 go from open to closed, TRDA6, TRDB6, TRDC6 are controlled from open to closed, that is, TRD6 is controlled from open to closed; after TRD5 goes from closed to open, and before TRD6 goes from open to closed, TRDA7, TRDB7, TRDC7 are controlled from closed to open, that is, TRD7 is controlled from closed to open;
before the TRD5 is switched from closed to open, the first vacuum switches DA1, DB1 and DC1 of each transformer switch group are controlled to be switched from open to closed, and are abbreviated as D1 switches in the figure; after the TRD5 goes from closed to open, and before the TRD7 goes from closed to open, the D1 switch is controlled from closed to open; after the TRD6 is opened to closed from the first time, and before the TRD2 and the TRG9 are opened to closed from the second time, the DR1 switch is controlled to be opened to closed from the first time, and meanwhile, the second vacuum switches GA2, GB2 and GC2 are controlled to be opened to closed from the second time, the high-voltage G2 switch is simply called in the drawing; after TRD1 and TRG8 go from closed to open, and before TRD3 and TRG10 go from closed to open, control the G2 switch and the D1 switch to go from closed to open; after TRDs 4 and TRG11 go from open to closed, the G2 switch and the D1 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-mentioned time sequence, and after the switches of the transformer switch group operate according to the above-mentioned time sequence, the synchronous switching from "D" to "Y" between the high-voltage windings and from parallel to series between the low-voltage windings 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 3 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, each fifth switch is controlled to be closed to be opened; after the fifth switch is switched from closed to open and before the second switch and the ninth switch are switched from open to closed, controlling each sixth switch to be switched from open to closed; after the fifth switches are closed to opened and before the sixth switches are opened to closed, controlling each seventh switch to be closed to opened; controlling the first vacuum switch from open to closed before the fifth switch from closed to open; after the fifth switch is closed to opened and before the seventh switch is closed to opened, controlling the first vacuum switch to be closed to opened; after the sixth switch is 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 from off, the first vacuum switch is controlled to be switched on from off, and the second vacuum switch is controlled to be switched on from off, so that the problems that a plurality of vacuum bubbles are required to be used in a vacuum load 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.
Optionally, in the capacitance adjusting method of the transformer provided in the embodiment of the present application, in a case that the transformer further includes a twelfth switch respectively disposed between the first end of the second coil in the three groups of low-voltage side coil groups and the first vacuum switch of the first switch group, the method further includes: controlling the twelfth switch from closed to open after the first vacuum switch is first closed to open and before the seventh switch is closed to open; and after the first vacuum switch and the second vacuum switch are opened to closed for the last time, controlling the twelfth switch to be opened to closed.
As shown in fig. 4, TRDA12, TRDB12, and TRDC12 are controlled from closed to open, that is, TRD12 is controlled from closed to open, after D1 is first closed to open and before TRD7 is first closed to open, and TRD12 is controlled from open to closed after D1 and G2 are last open to closed. Note that, after the TRDs 4 and TRG11 are opened to closed, the TRD12 may be controlled to be opened to closed.
In addition, when the twelfth switch is opened, the vacuum switch is required to cooperate with the twelfth switch to extinguish the arc, so that the vacuum switch of each transformer switch group is controlled to be opened from closed to closed after the fifth switch is opened from closed to closed and before the twelfth switch is opened from closed to closed. As shown in fig. 4, the DR1 switch is controlled from closed to open after TRD5 is closed to open and before TRD12 is 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, each fifth switch is controlled from open to closed; before the fifth switch is opened to closed and after the second switch and the ninth switch are closed to opened, controlling each sixth switch to be closed to opened; before the fifth switch is opened to closed and after the sixth switch is closed to opened, controlling each seventh switch to be opened to closed; 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 is 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 seventh switch is opened to closed and before the fifth switch is opened to closed, controlling the first vacuum switch to be opened to closed; after the fifth switch is opened to closed, the first vacuum switch is controlled to be opened 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 capacity to a high capacity, the transformer operates in a timing sequence from right to left, after each switch of a transformer switch group operates in the above timing sequence, "Y" to "D" switching between high-voltage windings and synchronous switching from series connection to parallel connection between low-voltage windings are completed, and a ratio of a large capacity to a small capacity before transformer capacitance adjustment to a small capacity after transformer capacitance adjustment is 1 to 3.
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, each fifth switch is controlled from open to closed; before the fifth switch is opened to closed and after the second switch and the ninth switch are closed to opened, controlling each sixth switch to be closed to opened; before the fifth switch is opened to closed and after the sixth switch is closed to opened, controlling each seventh switch to be opened to closed; 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 is 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 seventh switch is opened to closed and before the fifth switch is opened to closed, controlling the first vacuum switch to be opened to closed; after the fifth switch is switched from off to on, the first vacuum switch is controlled from on to off, and the problems that a plurality of vacuum bubbles are needed to be used in a vacuum load 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.
Optionally, in the capacitance adjusting method of the transformer provided in the embodiment of the present application, in a case that the transformer further includes a twelfth switch respectively disposed between the first end of the second coil in the three groups of low-voltage side coil groups and the first vacuum switch of the first switch group, the method further includes: the twelfth switch is controlled from closed to open before the first vacuum switch and the second vacuum switch are first closed to open, before the first vacuum switch is last open to closed, and after the seventh switch is open to closed. It should be noted that, before the fourth switch and the eleventh switch are turned on to off, the twelfth switch may be controlled to be turned on to off.
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 before the second switch and the ninth switch from open to closed;
a sixth control unit 56 for controlling each sixth switch from open to closed after the fifth switch is closed to open and before the second switch and the ninth switch are opened to closed;
a seventh control unit 57 for controlling each seventh switch from closed to open after the fifth switch is turned from closed to open and before the sixth switch is turned from open to closed;
an eighth control unit 58 for controlling the first vacuum switch from open to closed before the fifth switch from closed to open; after the fifth switch is closed to opened and before the seventh switch is closed to opened, controlling the first vacuum switch to be closed to opened; after the sixth switch is 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 that controls each of the fifth switches from closed to open before the second switch and the ninth switch are closed from open to closed; a sixth control unit 56 that controls each sixth switch from open to closed after the fifth switch is closed to open 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 after the fifth switch is turned from closed to open and before the sixth switch is turned from open to closed; an eighth control unit 58 which controls the first vacuum switch from open to closed before the fifth switch from closed to open; after the fifth switch is closed to opened and before the seventh switch is closed to opened, controlling the first vacuum switch to be closed to opened; after the sixth switch is 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 bubbles are needed to be used in a vacuum on-load capacity regulating switch group in the related art and the manufacturing cost is high are solved, and capacity regulation is performed 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 this embodiment of the present application, in a case that the transformer further includes a twelfth switch respectively disposed between the first end of the second coil in the three groups of low-voltage side coil groups and the first vacuum switch of the first switch group, the apparatus further includes: a seventeenth control unit for controlling the twelfth switch from closed to open after the first vacuum switch is first turned from closed to open and before the seventh switch is turned from closed to open; and after the first vacuum switch and the second vacuum switch are opened to closed for the last time, controlling the twelfth switch 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 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 before the fifth switch is opened to closed and after the second switch and the ninth switch are closed to opened;
a fifteenth control unit 67 for controlling each seventh switch from open to closed before the fifth switch is opened to closed and after the sixth switch is 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 is 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 seventh switch is opened to closed and before the fifth switch is opened to closed, controlling the first vacuum switch to be opened to closed; after the fifth switch is opened to closed, the first vacuum switch is controlled to be opened to closed.
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 closed after the second switch and the ninth switch are from closed to open; a fourteenth control unit 66 controlling each sixth switch from closed to open before the fifth switch is opened to closed and after the second switch and the ninth switch are closed to opened; a fifteenth control unit 67 that controls each seventh switch from open to closed before the fifth switch is opened to closed and after the sixth switch is 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 is 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 seventh switch is opened to closed and before the fifth switch is opened to closed, controlling the first vacuum switch to be opened to closed; after the fifth switch is switched off to be switched on, the first vacuum switch is controlled to be switched off to be switched on, the problems that a plurality of vacuum bubbles are needed to be used in a vacuum on-load capacity regulating switch group in the related technology and the manufacturing cost is high are solved, and capacity regulation is carried out 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 this embodiment of the present application, in a case that the transformer further includes a twelfth switch respectively disposed between the first end of the second coil in the three groups of low-voltage side coil groups and the first vacuum switch of the first switch group, the apparatus further includes: and the eighteenth control unit is used for controlling the twelfth switch to be opened from closed to opened before the first vacuum switch and the second vacuum switch are opened from closed to opened for the first time, and controlling the twelfth switch to be opened from closed to opened before the first vacuum switch is opened to closed for the last time and after the seventh switch is opened to closed.
The transformer capacity regulating device comprises a processor and a memory, the ninth control unit 61, the tenth control unit 62, the eleventh control unit 63, the twelfth control unit 64, the thirteenth control unit 65, the fourteenth control unit 66, the fifteenth control unit 67, the sixteenth 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 (10)
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 a first coil in a low-voltage side coil set of a transformer; a fourth switch disposed between the first end of the first vacuum switch and the first end of the second coil in the low side coil assembly; 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; the tenth switch is arranged between the first end of the second vacuum switch and the phase line of the transformer; an eleventh switch disposed between the first end of the second vacuum switch and a high voltage neutral; a second transition resistor disposed between the second end of the second vacuum switch and the high voltage neutral.
2. The transformer switch bank of claim 1, wherein the first switch bank further comprises:
a twelfth switch disposed between the second end of the first vacuum switch and the first end of the second coil.
3. A transformer comprising the transformer switch bank of claim 1, comprising:
three groups of low-voltage side coil groups, which are arranged on the low-voltage side of the iron core, wherein each group of low-voltage side coil groups comprises three groups of coils, a third coil in each group of low-voltage side coil groups is arranged between a second end of a first coil and the phase line, and a first switch group is arranged between each group of low-voltage side coil groups and a low-voltage neutral point, wherein a first switch of the first switch group is arranged between a first end of the first vacuum switch and the low-voltage neutral point, and a second switch of the first switch group is arranged between the second end of the first vacuum switch and the low-voltage neutral point;
the three groups of high-voltage side coil groups are arranged on the high-voltage side of the iron core, each group of high-voltage side coil group comprises a group of coils, the first end of the second switch group is connected with the first end of the group of coils, the second end of the second switch group is connected with the second end of the adjacent group of coils, the third end of the second switch group is connected to a high-voltage neutral point, the eighth switch of the second switch group is arranged between the first end of the second vacuum switch and the first end of the high-voltage side coil group, and the ninth switch of the second switch group is arranged between the second end of the second vacuum switch and the first end of the high-voltage side coil group.
4. The transformer of claim 3, further comprising:
and the twelfth switches are 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.
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;
controlling each of the fifth switches to be closed to open before the second and ninth switches are closed from open to closed;
after the fifth switch is opened from closed to opened and before the second switch and the ninth switch are opened from closed to closed, controlling each sixth switch to be opened from closed to closed;
after the fifth switches are closed to opened and before the sixth switches are opened to closed, controlling each seventh switch to be closed to opened;
controlling the first vacuum switch from open to closed before the fifth switch from closed to open; controlling the first vacuum switch from closed to open after the fifth switch is closed to open and before the seventh switch is closed to open; after the sixth switch is 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 twelfth switches respectively disposed between first ends of second coils of the three sets of the low side coil sets and second ends of first vacuum switches of the first switch set, the method further comprises:
controlling the twelfth switch from closed to open after the first vacuum switch is first turned from closed to open and before the seventh switch is turned from closed to open; controlling the twelfth switch to open to close after the first vacuum switch and the second vacuum switch last time from open to close.
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 closed to opened, controlling each fifth switch to be opened to closed;
controlling each of the sixth switches from closed to open before the fifth switch is opened to closed and after the second switch and the ninth switch are closed to opened;
before the fifth switches are opened to closed and after the sixth switches are closed to opened, controlling each seventh switch to be opened to closed;
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 switched from closed to open and before the sixth switch is switched from closed to open, controlling the first vacuum switch from closed to open and simultaneously controlling the second vacuum switch from closed to open; controlling the first vacuum switch from open to closed after the seventh switch is opened to closed and before the fifth switch is opened to closed; controlling the first vacuum switch from closed to open after the fifth switch from open to closed.
8. The method of claim 7, wherein in the case that the transformer further comprises twelfth switches respectively disposed between first ends of second coils of the three sets of the low side coil sets and second ends of first vacuum switches of the first switch set, the method further comprises:
controlling the twelfth switch from closed to open before the first vacuum switch and the second vacuum switch are first closed to open, controlling the twelfth switch from open to closed before the first vacuum switch is last open to closed, and controlling the twelfth switch from open to closed after the seventh switch is 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 before the second switch and the ninth switch are closed from open to closed;
a sixth control unit for controlling each of the sixth switches from open to closed after the fifth switch is closed to open and before the second switch and the ninth switch are opened to closed;
a seventh control unit for controlling each of the seventh switches from closed to open after the fifth switches are closed to open and before the sixth switches are opened to closed;
an eighth control unit for controlling the first vacuum switch from open to closed before the fifth switch from closed to open; controlling the first vacuum switch from closed to open after the fifth switch is closed to open and before the seventh switch is closed to open; after the sixth switch is 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 after the second switch and the ninth switch are closed to open;
a fourteenth control unit for controlling each of the sixth switches from closed to open before the fifth switch is opened to closed and after the second switch and the ninth switch are closed to opened;
a fifteenth control unit, configured to control each of the seventh switches to be turned off to be turned on before the fifth switch is turned off to be turned on and after the sixth switch is turned off to be turned on;
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 is switched from closed to open, controlling the first vacuum switch from closed to open and simultaneously controlling the second vacuum switch from closed to open; controlling the first vacuum switch from open to closed after the seventh switch is opened to closed and before the fifth switch is opened to closed; controlling the first vacuum switch from closed to open after the fifth switch from open to closed.
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| CN201811519321.7A CN109637858B (en) | 2018-12-12 | 2018-12-12 | Transformer switch group, transformer, and capacity adjusting method and device of transformer |
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| CN201811519321.7A CN109637858B (en) | 2018-12-12 | 2018-12-12 | Transformer switch group, transformer, and capacity adjusting method and device of transformer |
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| CN103219137B (en) * | 2013-03-26 | 2016-08-03 | 国家电网公司 | A kind of self adaptation load type distribution transformer |
| EP3024007A1 (en) * | 2015-04-13 | 2016-05-25 | ABB Technology Ltd | A diverter switch of resistor type, a method for controlling the diverter switch, and an on-load tap changer including the diverter switch |
| CN108063042B (en) * | 2017-06-15 | 2021-02-05 | 浙江宝威电气有限公司 | Capacity and voltage regulating transformer |
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