CN115295298A - Dyn11-Yzn11 conversion capacitance-adjusting transformer switch group, transformer and transformer capacitance-adjusting method - Google Patents
Dyn11-Yzn11 conversion capacitance-adjusting transformer switch group, transformer and transformer capacitance-adjusting method Download PDFInfo
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- CN115295298A CN115295298A CN202210761577.9A CN202210761577A CN115295298A CN 115295298 A CN115295298 A CN 115295298A CN 202210761577 A CN202210761577 A CN 202210761577A CN 115295298 A CN115295298 A CN 115295298A
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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
- H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
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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
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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
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention discloses a Dyn11-Yzn11 conversion capacity-regulating transformer switch group, a transformer and a transformer capacity-regulating method. The 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; the first switch group includes: the vacuum circuit 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. The invention solves the technical problem of sudden phase change of the power supply voltage caused by adjusting the capacity of the transformer in the related technology.
Description
Technical Field
The invention relates to the field of transformers, in particular to a capacitance-regulating transformer switch group converted by Dyn11-Yzn11, a transformer and a capacitance-regulating method of the transformer.
Background
The on-load tap-changer equipped for the early power transformer mostly adopts high-speed resistance switching, and the load conversion is carried out by copper-tungsten arc contacts. The tap changer has the advantages of frequent switching, relatively serious burning loss of an electric arc contact, high carbonization and pollution speed of oil, and increased workload of routine maintenance and regular overhaul for a power supply department.
With the widespread popularization of vacuum technology and power electronic information, on-load tap changers have also undergone revolutionary changes. In order to meet the requirement of modern development of an electric power system, thoroughly solve the problem of oil pollution, improve the mechanical life and the electrical life of a contact of an on-load tap-changer, prolong the maintenance period, obviously reduce the maintenance cost, and improve the reliability and the safety of operation, domestic and foreign on-load tap-changer manufacturing enterprises research and develop oil-immersed and gas-type vacuum arc-extinguishing on-load tap-changers one by one. However, the most significant disadvantage of the permanent magnet switch is that the switch position is few, only two contacts of normally open and normally closed are provided, and a plurality of sets of permanent magnet mechanisms and vacuum tubes are required to be configured to realize the multi-stage voltage regulation or capacity regulation function.
In addition, the conventional capacitance-regulating transformer adopts a Dyn11-Yyn0 conversion mode, and the change of a voltage phase angle inevitably occurs in the switching process, so that the power supply quality is influenced. Meanwhile, the problems of high power supply voltage and high power supply voltage caused by unbalanced three-phase current and the problem of increased unbalanced three-phase loss caused by the unbalanced three-phase current under the condition of Yyn0 capacity are solved.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a capacitance-regulating transformer switch group converted from Dyn11-Yzn11, a transformer and a transformer capacitance-regulating method, which are used for at least solving the technical problem of sudden change of a power supply voltage phase caused by regulating the capacity of the transformer in the related technology.
According to an aspect of an embodiment of the present invention, there is provided a transformer switch block, including: 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 comprises: a first vacuum switch, a first switch and a second switch being disposed at a first end of the first vacuum switch, the first switch being disposed between the first end of the first vacuum switch and a first end of a first coil in a low-voltage side coil group of a transformer, the second switch being disposed between the first end of the first vacuum switch and a second end of a second coil of a first adjacent phase of the transformer; a third switch disposed between the first end of the first vacuum switch and a low voltage neutral point; a fourth switch disposed between the second end of the vacuum switch and the low voltage neutral point; a first transition resistor disposed between a second end of the vacuum switch and a second end of the second coil of the first adjacent phase of the transformer; the fifth switch is arranged between the first end of the second coil in the low-voltage side coil group of the transformer and the low-voltage neutral point; a sixth switch disposed between the first end of the second coil and the first end of the first coil in a second adjacent phase of the transformer; the seventh switch is arranged between the second end of the second coil and the phase line of the low-voltage side coil group of the transformer; 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 phase line of the first adjacent phase of the transformer; the eleventh switch is arranged between the first end of the second vacuum switch and a high-voltage neutral point; a second transition resistor disposed between the second end of the second vacuum switch and the high voltage neutral.
According to another aspect of the embodiments of the present invention, there is also provided a transformer, including: the transformer comprises the transformer switch group and also comprises: 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 two groups of coils, the second end of the first coil is connected with the phase line, and the second end of the second coil is connected with the transition resistor of the second adjacent phase; 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.
According to another aspect of the embodiments of the present invention, there is also provided a transformer capacitance adjusting method, applied to the transformer, including: controlling the seventh switch of each of the first switch groups from closed to open; controlling the fifth switch of each of the first switch groups from closed to open after the seventh switch is turned off; after the fifth switch is opened, controlling the sixth switch of each first switch group to be opened to be closed; after the sixth switch is closed, controlling the first vacuum switch of each first switch group to be opened to be closed and controlling the second vacuum switch of each second switch group to be opened to be closed; after the first vacuum switch and the second vacuum switch are closed, controlling a fourth switch of each first switch group to be opened to be closed and controlling a ninth switch of each second switch group to be reversely closed from being opened; after the fourth switch and the ninth switch are closed, controlling the third switch of each first switch group to be closed to be opened, and controlling the eighth switch of each second switch group to be closed to be opened; controlling the first vacuum switch and the second vacuum switch from closed to open after the third switch and the eighth switch are turned off; after the first vacuum switch and the second vacuum switch are opened, controlling a first switch of each first switch group to be closed to be opened, and controlling a tenth switch of each second switch group to be closed to be opened; after the first switch and the tenth switch are opened, controlling a second switch of each first switch group to be opened to be closed and controlling an eleventh switch of each second switch group to be opened to be closed; controlling the first vacuum switch and the second vacuum switch from open to closed after the second switch and the eleventh switch are closed.
According to another aspect of the embodiments of the present invention, there is also provided a transformer capacitance adjusting method, applied to the transformer, including: controlling the seventh switch of each of the first switch groups from closed to open; after the seventh switch is turned off, controlling the sixth switch of each of the first switch groups from being opened to being closed; after the sixth switch is closed, controlling the fifth switch of each first switch group to be opened from closed; after the fifth switch is opened, controlling the first vacuum switch of each first switch group to be opened to be closed and controlling the second vacuum switch of each second switch group to be opened to be closed; after the first vacuum switch and the second vacuum switch are closed, controlling a fourth switch of each first switch group to be opened to be closed and controlling a ninth switch of each second switch group to be reversely closed from being opened; after the fourth switch and the ninth switch are closed, controlling the third switch of each first switch group to be closed to be opened, and controlling the eighth switch of each second switch group to be closed to be opened; controlling the first vacuum switch and the second vacuum switch from closed to open after the third switch and the eighth switch are turned off; after the first vacuum switch and the second vacuum switch are opened, controlling a first switch of each first switch group to be closed to be opened, and controlling a tenth switch of each second switch group to be closed to be opened; after the first switch and the tenth switch are opened, controlling a second switch of each first switch group to be opened to be closed and controlling an eleventh switch of each second switch group to be opened to be closed; controlling the first vacuum switch and the second vacuum switch from open to closed after the second switch and the eleventh switch are closed.
According to another aspect of the embodiments of the present invention, there is also provided a transformer capacitance adjusting apparatus, where the first control module is configured to control the seventh switch of each of the first switch groups to be turned on and off; a second control module for controlling the fifth switch of each of the first switch groups from closed to open after the seventh switch is turned off; a third control module, configured to control the sixth switch of each first switch group to be turned on after the fifth switch is turned off; a fourth control module for controlling the first vacuum switch of each first switch group to be opened to be closed and the second vacuum switch of each second switch group to be opened to be closed after the sixth switch is closed; a fifth control module for controlling the fourth switch of each first switch group to be opened to be closed and controlling the ninth switch of each second switch group to be reversed from being opened after the first vacuum switch and the second vacuum switch are closed; a sixth control module, configured to control the third switch of each first switch group to be turned on and turned off and the eighth switch of each second switch group to be turned on and turned off after the fourth switch and the ninth switch are turned on; a seventh control module for controlling the first vacuum switch and the second vacuum switch from closed to open after the third switch and the eighth switch are opened; an eighth control module for controlling the first switch of each first switch group to be closed to be opened and controlling the tenth switch of each second switch group to be closed to be opened after the first vacuum switch and the second vacuum switch are opened; a ninth control module, configured to control the second switch of each first switch group to be opened to be closed and the eleventh switch of each second switch group to be opened to be closed after the first switch and the tenth switch are opened; a tenth control module to control the first vacuum switch and the second vacuum switch from open to closed after the second switch and the eleventh switch are closed.
According to still another aspect of the embodiments of the present invention, there is further provided a transformer capacitance adjusting apparatus, wherein the eleventh control module is configured to control the seventh switch of each of the first switch groups to be switched from on to off; a twelfth control module for controlling the sixth switch of each first switch group to be opened to closed after the seventh switch is opened; a thirteenth control module for controlling the fifth switch of each of the first switch groups to be turned off after the sixth switch is turned on; a fourteenth control module for controlling the first vacuum switch of each first switch group to be opened to be closed and the second vacuum switch of each second switch group to be opened to be closed after the fifth switch is opened; a fifteenth control module for controlling the fourth switch of each of the first switch sets to be turned off to be turned on and controlling the ninth switch of each of the second switch sets to be turned back on from being turned off after the first vacuum switch and the second vacuum switch are turned on; a sixteenth control module, configured to control the third switch of each first switch group to be turned on and turned off and control the eighth switch of each second switch group to be turned on and turned off after the fourth switch and the ninth switch are turned on; a seventeenth control module for controlling the first vacuum switch and the second vacuum switch from closed to open after the third switch and the eighth switch are turned off; an eighteenth control module for controlling the first switch of each first switch group to be closed to be opened and the tenth switch of each second switch group to be closed to be opened after the first vacuum switch and the second vacuum switch are opened; a nineteenth control module for controlling the second switch of each of the first switch groups to be opened to closed and the eleventh switch of each of the second switch groups to be opened to closed after the first switch and the tenth switch are opened; a twentieth control module for controlling the first and second vacuum switches from open to closed after the second and eleventh switches are 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: a first vacuum switch, a first switch and a second switch being disposed at a first end of the first vacuum switch, the first switch being disposed between the first end of the first vacuum switch and a first end of a first coil in a low-voltage side coil group of a transformer, the second switch being disposed between the first end of the first vacuum switch and a second end of a second coil of a first adjacent phase of the transformer; a third switch disposed between the first end of the first vacuum switch and a low voltage neutral point; a fourth switch disposed between the second end of the vacuum switch and the low voltage neutral point; the first transition resistor is arranged between the second end of the vacuum switch and the second end of the second coil of the first adjacent phase of the transformer; the fifth switch is arranged between the first end of the second coil in the low-voltage side coil group of the transformer and the low-voltage neutral point; a sixth switch disposed between the first end of the second coil and the first end of the first coil in the second low-voltage side coil group of the transformer; the seventh switch is arranged between the second end of the second coil and the phase line of the low-voltage side coil group of the transformer; the second switch group includes: the first end of the second vacuum switch is provided with an eighth switch, and the second 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 phase line of the first adjacent phase of the transformer; an eleventh switch disposed between the first end of the second vacuum switch and a high voltage neutral; the second transition resistor is arranged between the second end of the second vacuum switch and the high-voltage neutral point, so that the purpose of adjusting the capacity of the transformer without changing the phase of the power supply voltage is achieved, the technical effect of avoiding the reduction of the power supply quality caused by phase mutation is achieved, and the technical problem of phase mutation of the power supply voltage caused by adjusting the capacity of the transformer in the related technology is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:
FIG. 1 is a schematic diagram of a transformer switch bank 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 disclosure;
fig. 3 is a schematic structural diagram of a high-voltage side coil and a second switch set of a transformer according to an embodiment of the present disclosure;
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 transformer capacitance adjusting device according to an embodiment of the application;
fig. 6 is a schematic diagram of a transformer capacitance adjusting device according to an embodiment of the application.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention 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 is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Moreover, 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 12 arranged at the low-voltage side of the transformer, and a second switch group 14 arranged at the high-voltage side of the transformer; wherein, the first switch group 12 includes: the first vacuum switch and the second vacuum switch are arranged at the first end of the first vacuum switch, the first switch is arranged between the first end of the first vacuum switch and the first end of the first coil in the low-voltage side coil group of the transformer, and the second switch is arranged between the first end of the first vacuum switch and the second end of the second coil of the first adjacent phase of the transformer; the third switch is arranged between the first end of the first vacuum switch and the low-voltage neutral point; the fourth switch is arranged between the second end of the vacuum switch and the low-voltage neutral point; the first transition resistor is arranged between the second end of the vacuum switch and the second end of the second coil of the first adjacent phase of the transformer; the fifth switch is arranged between the first end of the second coil in the low-voltage side coil group of the transformer and the low-voltage neutral point; a sixth switch disposed between the first end of the second coil and the first end of the first coil in a second adjacent phase of the transformer; and the seventh switch is arranged between the second end of the second coil and the phase line of the low-voltage side coil group of the transformer.
It should be noted that the first adjacent phase and the second adjacent phase are different phases adjacent to the low-voltage side coil group of the transformer in the low-voltage side of the transformer, respectively. The order of the first adjacent phase and the second adjacent phase may not be limited.
The second switch group 14 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 first adjacent phase 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. The transformer switch group in the embodiment has the advantages that through ingenious design, the use number of the permanent magnet vacuum arc-extinguishing switches is greatly reduced, the multi-stage voltage regulation or capacity regulation function is realized, and the size and the cost of equipment are saved. In addition, the switch group of the embodiment adopts a transformer wiring conversion mode from Dyn11 to Yzn11, and from the principle, the phase mutation of the power supply voltage caused by switching is avoided, and the power supply quality is improved. And thirdly, the switch group can simultaneously reduce zero sequence loss increase caused by three-phase imbalance, and the technical effect of further reducing distribution transformer loss is realized.
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 between the first end of the first vacuum switch and the first end of the first coil in the low-voltage side coil group of the transformer, and the second switch is arranged between the first end of the first vacuum switch and the second end of the first adjacent second coil of the transformer; the third switch is arranged between the first end of the first vacuum switch and the low-voltage neutral point; the fourth switch is arranged between the second end of the vacuum switch and the low-voltage neutral point; the first transition resistor is arranged between the second end of the vacuum switch and the second end of the second coil of the first adjacent phase of the transformer; the fifth switch is arranged between the first end of the second coil in the low-voltage side coil group of the transformer and the low-voltage neutral point; the sixth switch is arranged between the first end of the second coil and the first end of the first coil in the second low-voltage side coil group of the transformer; the seventh switch is arranged between the second end of the second coil and the phase line of the low-voltage side coil group of the transformer; 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 first adjacent phase 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 purpose that the capacity of the transformer is adjusted without changing the phase of the power supply voltage is achieved, so that the technical effect of avoiding the reduction of the power supply quality caused by phase mutation is achieved, and the technical problem that the phase mutation of the power supply voltage is caused by adjusting the capacity of the transformer in the related technology is solved.
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 two groups of coils, the second end of the first coil is connected with the phase line, and the second end of the second coil is connected with the transition resistor of the second adjacent phase;
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. 2 and fig. 3, 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 disclosure, and fig. 3 is a schematic structural diagram of a high-voltage side coil and a second switch set of a transformer according to an embodiment of the present disclosure.
In the three-group transformer switch group, the first vacuum switches are respectively represented by DA1, DB1 and DC1, the first switches TRDA1, TRDB1 and TRDC1, the second switches are respectively represented by TRDA2, TRDB2 and TRDC2, the third switches are respectively represented by TRDA3, TRDB3 and TRDC3, the fourth switches are respectively represented by TRDA4, TRDB4 and TRDC4, the fifth switches are respectively represented by TRDA5, TRDB5 and TRDC5, the sixth switches are respectively represented by TRDA6, TRDB6 and TRDC6, the seventh switches are respectively represented by TRDA7, TRDB7 and TRDC7, the first transition resistances are respectively represented by DRA1, DRB1 and DRC1, the first coils are respectively represented by TA1, TB1 and TC1, the second coils are respectively represented by TA2, TB2 and TC2, and the low-voltage neutral point is represented by a DC point in the figure.
In the second switch group of the three groups of transformers, the second vacuum switches are respectively represented by GA2, GB2 and GC2, the eighth switches are respectively represented by TRGA8, TRGB8 and TRGC8, the ninth switches are respectively represented by TRGA9, TRGB9 and TRGC9, the on-off between the switch group of the transformers and the coil is realized through the eighth switch or the ninth switch, the tenth switches are respectively represented by TRGA10, TRGB10 and TRGC10, the eleventh switches are respectively represented by TRGA11, TRGB11 and TRGC11, the second transition resistors are respectively represented by GRA2, GRB2 and GRC2, and the high-voltage neutral point is represented by a GC point in the figure.
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 seventh switch of each first switch group to be opened from closed; after the seventh switch is turned off, controlling the fifth switch of each first switch group to be turned off from closed; after the fifth switch is opened, controlling the sixth switch of each first switch group to be opened to be closed; after the sixth switch is closed, controlling the first vacuum switch of each first switch group to be opened to be closed and controlling the second vacuum switch of each second switch group to be opened to be closed; after the first vacuum switch and the second vacuum switch are closed, controlling the fourth switch of each first switch group to be opened to be closed and controlling the ninth switch of each second switch group to be reversely closed from being opened; after the fourth switch and the ninth switch are closed, controlling the third switch of each first switch group to be closed to be opened, and controlling the eighth switch of each second switch group to be closed to be opened; after the third switch and the eighth switch are turned off, controlling the first vacuum switch and the second vacuum switch to be turned off from closed; after the first vacuum switch and the second vacuum switch are opened, controlling the first switch of each first switch group to be closed to be opened, and controlling the tenth switch of each second switch group to be closed to be opened; after the first switch and the tenth switch are opened, controlling the second switch of each first switch group to be opened to be closed, and controlling the eleventh switch of each second switch group to be opened to be closed; and after the second switch and the eleventh switch are closed, controlling the first vacuum switch and the second vacuum switch to be opened to be closed.
As shown in fig. 4, which is a timing diagram of a transformer capacity adjusting method according to an embodiment of the present application, when a transformer is switched from a high capacity to a low capacity, the on/off of a transformer switch group can be controlled according to a timing operation from left to right. In the figure, the first switches TRDA1, TRDB1 and TRDC1 are abbreviated as TR1, TRDA2, TRDB2 and TRDC2 are abbreviated as TR2, TRDA5, TRDB5 and TRDC5 are abbreviated as TR5, TRDA6, TRDB6 and TRDC6 are abbreviated as TR6, TRDA7, TRDB7 and TRDC7 are abbreviated as TR7, TRDA8, TRDB8 and TRDC8 are abbreviated as TR8, TRDA9, TRDB9 and TRDC9 are abbreviated as TR9, TRDA10, TRDB10 and TRDC10 are abbreviated as TR10, TRDA111, TRDB111 and TRDC111 are abbreviated as TR11, and the vacuum switches DA1, GA2, DB1, GB2, DC1 and GC2 are abbreviated as vacuum switches.
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 conversion from Dyn11 to Yzn11 among the transformer windings is completed. The transformer capacitance adjusting method applied to the transformer provided by this embodiment can realize conversion from Dyn11 to Yzn11 between transformer windings through the time sequence action, and realize a capacitance adjusting process from a large capacity to a small capacity. It can be understood by those skilled in the art that the capacitance adjusting method for adjusting the transformer from small capacity to large capacity is the inverse process of the capacitance adjusting method for the transformer, and the adjustment of the transformer from small capacity to large capacity can be completed by performing time sequence control according to the inverse capacitance adjusting process given by the capacitance adjusting method for the transformer.
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 here.
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 can be used to execute the transformer capacitance adjusting method provided in 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 module 51 for controlling the seventh switch of each first switch group from closed to open;
a second control module 52 for controlling the fifth switch of each first switch group from closed to open after the seventh switch is opened;
a third control module 53 for controlling the sixth switch of each first switch group from open to closed after the fifth switch is open;
a fourth control module 54 for controlling the first vacuum switch of each first switch set to open to close and the second vacuum switch of each second switch set to open to close after the sixth switch is closed;
a fifth control module 55 for controlling the fourth switch of each first switch group to be turned off to be turned on and controlling the ninth switch of each second switch group to be turned back on from being turned off after the first vacuum switch and the second vacuum switch are turned on;
a sixth control module 56 for controlling the third switch of each first switch group to be closed to be opened and controlling the eighth switch of each second switch group to be closed to be opened after the fourth switch and the ninth switch are closed;
a seventh control module 57 for controlling the first vacuum switch and the second vacuum switch from closed to open after the third switch and the eighth switch are opened;
an eighth control module 58 for controlling the first switch of each first switch set from closed to open and the tenth switch of each second switch set from closed to open after the first vacuum switch and the second vacuum switch are open;
a ninth control module 59 for controlling the second switch of each first switch group to be opened to closed and the eleventh switch of each second switch group to be opened to closed after the first switch and the tenth switch are opened;
and a tenth control module 60 for controlling the first vacuum switch and the second vacuum switch from open to closed after the second switch and the eleventh switch are closed.
The transformer capacity regulating device comprises a processor and a memory, the first control module 51, the second control module 52, the third control module 53, the fourth control module 54, the fifth control module 55, the sixth control module 56, the seventh control module 57, the eighth control module 58, the ninth control module 59, the tenth control module 60 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:
an eleventh control module 61 for controlling the seventh switch of each first switch group from closed to open;
a twelfth control module 62 for controlling the sixth switch of each first switch group to be opened to closed after the seventh switch is opened;
a thirteenth control module 63 for controlling the fifth switch of each first switch group from closed to open after the sixth switch is closed;
a fourteenth control module 64 for controlling the first vacuum switch of each first switch set to open to close and the second vacuum switch of each second switch set to open to close after the fifth switch is opened;
a fifteenth control module 65 for controlling the fourth switch of each first switch group to be opened to closed and the ninth switch of each second switch group to be closed upside down from open after the first vacuum switch and the second vacuum switch are closed;
a sixteenth control module 66 for controlling the third switch of each first switch group to be closed to be opened and controlling the eighth switch of each second switch group to be closed to be opened after the fourth switch and the ninth switch are closed;
a seventeenth control module 67 for controlling the first and second vacuum switches from closed to open after the third and eighth switches are opened;
an eighteenth control module 68 for controlling the first switch of each first switch set from closed to open and the tenth switch of each second switch set from closed to open after the first vacuum switch and the second vacuum switch are open;
a nineteenth control module 69 for controlling the second switch of each first switch group to be opened to closed and the eleventh switch of each second switch group to be opened to closed after the first switch and the tenth switch are opened;
and the twentieth control module 70 is used for controlling the first vacuum switch and the second vacuum switch to be opened to be closed after the second switch and the eleventh switch are closed.
The capacitance-regulating device of the transformer comprises a processor and a memory, wherein the eleventh control module 61, the twelfth control module 62, the thirteenth control module 63, the fourteenth control module 64, the fifteenth control module 65, the sixteenth control module 66, the seventeenth control module 67, the eighteenth control module 68, the nineteenth control module 69, the twentieth control module 70 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.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other manners. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (6)
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: a first vacuum switch, a first switch and a second switch being disposed at a first end of the first vacuum switch, the first switch being disposed between the first end of the first vacuum switch and a first end of a first coil in a low-voltage side coil group of a transformer, the second switch being disposed between the first end of the first vacuum switch and a second end of a second coil of a first adjacent phase of the transformer; a third switch disposed between the first end of the first vacuum switch and a low voltage neutral point; a fourth switch disposed between the second end of the vacuum switch and the low voltage neutral point; a first transition resistor disposed between a second end of the vacuum switch and a second end of the second coil of the first adjacent phase of the transformer; the fifth switch is arranged between a first end of a second coil in a low-voltage side coil group of the transformer and the low-voltage neutral point; a sixth switch disposed between a first end of the second coil and a first end of the first coil in a second adjacent phase of the transformer; the seventh switch is arranged between the second end of the second coil and the phase line of the low-voltage side coil group of the transformer;
the second switch group includes: the first end of the second vacuum switch is provided with an eighth switch, and the second 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 phase line of the first adjacent phase of the transformer; the eleventh switch is arranged between the first end of the second vacuum switch and a high-voltage neutral point; a second transition resistor disposed between the second end of the second vacuum switch and the high voltage neutral.
2. A transformer comprising the transformer switch bank of claim 1, further comprising:
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 two groups of coils, the second end of the first coil is connected with the phase line, and the second end of the second coil is connected with the transition resistor of the second adjacent phase;
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.
3. A transformer capacity regulating method applied to the transformer of claim 2, comprising:
controlling the seventh switch of each of the first switch groups from closed to open;
controlling the fifth switch of each of the first switch groups from closed to open after the seventh switch is turned off;
after the fifth switch is opened, controlling the sixth switch of each first switch group to be opened to be closed;
after the sixth switch is closed, controlling the first vacuum switch of each first switch group to be opened to be closed and controlling the second vacuum switch of each second switch group to be opened to be closed;
after the first vacuum switch and the second vacuum switch are closed, controlling a fourth switch of each first switch group to be opened to be closed and controlling a ninth switch of each second switch group to be reversely closed from being opened;
after the fourth switch and the ninth switch are closed, controlling the third switch of each first switch group to be closed to be opened, and controlling the eighth switch of each second switch group to be closed to be opened;
controlling the first and second vacuum switches from closed to open after the third and eighth switches are opened;
after the first vacuum switch and the second vacuum switch are opened, controlling a first switch of each first switch group to be closed to be opened, and controlling a tenth switch of each second switch group to be closed to be opened;
after the first switch and the tenth switch are opened, controlling a second switch of each first switch group to be opened to be closed and controlling an eleventh switch of each second switch group to be opened to be closed;
controlling the first vacuum switch and the second vacuum switch from open to closed after the second switch and the eleventh switch are closed.
4. A transformer capacity regulating method applied to the transformer of claim 2, comprising:
controlling the seventh switch of each of the first switch groups from closed to open;
after the seventh switch is turned off, controlling the sixth switch of each of the first switch groups from being opened to being closed;
after the sixth switch is closed, controlling the fifth switch of each first switch group to be opened from closed;
after the fifth switch is opened, controlling the first vacuum switch of each first switch group to be opened to be closed and controlling the second vacuum switch of each second switch group to be opened to be closed;
after the first vacuum switch and the second vacuum switch are closed, controlling a fourth switch of each first switch group to be opened to be closed and controlling a ninth switch of each second switch group to be reversely closed from being opened;
after the fourth switch and the ninth switch are closed, controlling the third switch of each first switch group to be closed to be opened, and controlling the eighth switch of each second switch group to be closed to be opened;
controlling the first and second vacuum switches from closed to open after the third and eighth switches are opened;
after the first vacuum switch and the second vacuum switch are opened, controlling a first switch of each first switch group to be closed to be opened, and controlling a tenth switch of each second switch group to be closed to be opened;
after the first switch and the tenth switch are opened, controlling a second switch of each first switch group to be opened to be closed and controlling an eleventh switch of each second switch group to be opened to be closed;
controlling the first vacuum switch and the second vacuum switch from open to closed after the second switch and the eleventh switch are closed.
5. A transformer capacity regulating device applied to the transformer of claim 2, comprising:
a first control module for controlling the seventh switch of each first switch group from being closed to being opened;
a second control module for controlling the fifth switch of each of the first switch groups from closed to open after the seventh switch is turned off;
a third control module for controlling the sixth switch of each first switch group to be opened to closed after the fifth switch is opened;
a fourth control module for controlling the first vacuum switch of each first switch group to be opened to be closed and the second vacuum switch of each second switch group to be opened to be closed after the sixth switch is closed;
a fifth control module for controlling the fourth switch of each first switch group to be opened to be closed and controlling the ninth switch of each second switch group to be reversed from being opened after the first vacuum switch and the second vacuum switch are closed;
a sixth control module, configured to control the third switch of each first switch group to be turned on and turned off and the eighth switch of each second switch group to be turned on and turned off after the fourth switch and the ninth switch are turned on;
a seventh control module for controlling the first vacuum switch and the second vacuum switch from closed to open after the third switch and the eighth switch are opened;
an eighth control module for controlling the first switch of each of the first switch sets to be closed to be open and controlling the tenth switch of each of the second switch sets to be closed to be open after the first vacuum switch and the second vacuum switch are opened;
a ninth control module, configured to control the second switch of each first switch group to be opened to be closed and the eleventh switch of each second switch group to be opened to be closed after the first switch and the tenth switch are opened;
a tenth control module for controlling the first and second vacuum switches from open to closed after the second and eleventh switches are closed.
6. A transformer capacity regulating device applied to the transformer of claim 2, comprising:
an eleventh control module, configured to control the seventh switch of each of the first switch groups to be turned on and off;
a twelfth control module for controlling the sixth switch of each first switch group to be opened to closed after the seventh switch is opened;
a thirteenth control module for controlling the fifth switch of each of the first switch groups to be turned off after the sixth switch is turned on;
a fourteenth control module for controlling the first vacuum switch of each of the first switch sets to be opened to be closed and the second vacuum switch of each of the second switch sets to be opened to be closed after the fifth switch is opened;
a fifteenth control module for controlling the fourth switch of each of the first switch sets to be turned off to be turned on and controlling the ninth switch of each of the second switch sets to be turned back on from being turned off after the first vacuum switch and the second vacuum switch are turned on;
a sixteenth control module, configured to control the third switch of each first switch group to be turned on and turned off and control the eighth switch of each second switch group to be turned on and turned off after the fourth switch and the ninth switch are turned on;
a seventeenth control module for controlling the first vacuum switch and the second vacuum switch from closed to open after the third switch and the eighth switch are turned off;
an eighteenth control module for controlling the first switch of each of the first switch sets to be closed to be open and controlling the tenth switch of each of the second switch sets to be closed to be open after the first vacuum switch and the second vacuum switch are opened;
a nineteenth control module for controlling the second switch of each of the first switch groups to be opened to closed and the eleventh switch of each of the second switch groups to be opened to closed after the first switch and the tenth switch are opened;
a twentieth control module for controlling the first vacuum switch and the second vacuum switch from open to closed after the second switch and the eleventh switch are closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210761577.9A CN115295298A (en) | 2022-06-30 | 2022-06-30 | Dyn11-Yzn11 conversion capacitance-adjusting transformer switch group, transformer and transformer capacitance-adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210761577.9A CN115295298A (en) | 2022-06-30 | 2022-06-30 | Dyn11-Yzn11 conversion capacitance-adjusting transformer switch group, transformer and transformer capacitance-adjusting method |
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| Publication Number | Publication Date |
|---|---|
| CN115295298A true CN115295298A (en) | 2022-11-04 |
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|---|---|---|---|
| CN202210761577.9A Pending CN115295298A (en) | 2022-06-30 | 2022-06-30 | Dyn11-Yzn11 conversion capacitance-adjusting transformer switch group, transformer and transformer capacitance-adjusting method |
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| Country | Link |
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| CN (1) | CN115295298A (en) |
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2022
- 2022-06-30 CN CN202210761577.9A patent/CN115295298A/en active Pending
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