CN108063042B - Capacity and voltage regulating transformer - Google Patents
Capacity and voltage regulating transformer Download PDFInfo
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- CN108063042B CN108063042B CN201711080468.6A CN201711080468A CN108063042B CN 108063042 B CN108063042 B CN 108063042B CN 201711080468 A CN201711080468 A CN 201711080468A CN 108063042 B CN108063042 B CN 108063042B
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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
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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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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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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Abstract
The invention discloses a capacity and voltage regulating transformer, which comprises a low-voltage winding, a high-voltage winding and a capacity regulating switch, wherein when the capacity regulating switch is in a high-capacity state, the capacity regulating switch drives the winding to be in a Dy connection mode; when the capacity regulating switch is in a small capacity state, the capacity regulating switch driving winding is in a Dy connection mode, the capacity regulating switch further comprises a voltage regulating switch, the voltage regulating switch comprises a rated vacuum arc-extinguishing chamber and a transition vacuum arc-extinguishing chamber connected with a transition resistor in parallel, and the rated vacuum arc-extinguishing chamber and the transition vacuum arc-extinguishing chamber are connected in series. The ratio of the no-load loss of the high capacity and the low capacity of the Dy/Dy capacity-regulating conversion mode is about 4:1, and the no-load loss of the Dy/Dy capacity-regulating conversion mode is lower than that of other capacity-regulating conversion modes when the Dy/Dy capacity-regulating conversion mode is in the low capacity, so that the Dy/Dy capacity-regulating conversion mode is particularly suitable for being applied to occasions with large power consumption peak-valley; through having set up vacuum interrupter and come the cooperation to step up, realized on-load voltage regulation for regulation capacity transformer under the Dy/Dy transfers the appearance mode can realize the voltage regulation.
Description
Technical Field
The invention belongs to the technical field of transformer equipment in the power industry, and particularly relates to a capacity and voltage regulating transformer.
Background
In the occasions with large difference of power consumption peak valley, such as office buildings and other office places, trade cities, development areas, tourist areas and other occasions, the time-interval load is obvious, the working time load rate is high, but the non-working time load rate is low; in the north, in order to inhibit frequent haze occurrence in winter, coal-to-electricity conversion is vigorously carried out in some areas, and a 'peak-valley electricity price subsidy policy' from 9 nights to 6 nights is introduced, so that the peak load rate of electricity utilization in winter is as high as 70-85%, the peak load rate of electricity utilization in summer is only possibly 20-30%, and the load rate of electricity utilization in spring and autumn is lower to below 10%. In these cases, if the conventional capacity adjustment method is adopted, the no-load loss at low capacity is very high.
It is urgently needed to provide a capacity-regulating and voltage-regulating transformer to adapt to occasions with large power consumption peak-valley difference.
Disclosure of Invention
In order to solve the problems, the invention provides a capacity-regulating and voltage-regulating transformer with low no-load loss in low capacity.
In order to achieve the purpose, the invention adopts the following technical scheme: a capacity-regulating and voltage-regulating transformer comprises a low-voltage winding, a high-voltage winding and a capacity-regulating switch, wherein when the capacity-regulating switch is in a high-capacity state, the capacity-regulating switch drives the winding to be in a Dy connection mode; when the capacity regulating switch is in a small capacity state, the capacity regulating switch driving winding is in a Dy connection mode, the capacity regulating switch further comprises a voltage regulating switch, the voltage regulating switch comprises a rated vacuum arc-extinguishing chamber and a transition vacuum arc-extinguishing chamber connected with a transition resistor in parallel, and the rated vacuum arc-extinguishing chamber and the transition vacuum arc-extinguishing chamber are connected in series. The ratio of the no-load loss of the high capacity and the low capacity of the Dy/Dy capacity-regulating conversion mode is about 4:1, and the no-load loss of the Dy/Dy capacity-regulating conversion mode is lower than that of other capacity-regulating conversion modes when the Dy/Dy capacity-regulating conversion mode is in the low capacity, so that the Dy/Dy capacity-regulating conversion mode is particularly suitable for being applied to occasions with large power consumption peak-valley; through having set up vacuum interrupter and come the cooperation to step up, realized on-load voltage regulation for regulation capacity transformer under the Dy/Dy transfers the appearance mode can realize the voltage regulation.
Furthermore, the voltage regulating switch also comprises at least one voltage reducing vacuum arc-extinguishing chamber and at least one voltage boosting vacuum arc-extinguishing chamber; a group of voltage reduction branches and a group of voltage boosting branches are arranged through the vacuum arc-extinguishing chamber, and voltage reduction and voltage boosting are achieved through the vacuum arc-extinguishing chamber respectively.
Furthermore, the high-voltage winding comprises a first high-voltage winding and a second high-voltage winding, and when the high-voltage winding is in a large capacity, the first high-voltage winding and the second high-voltage winding are connected in parallel; and when the high-voltage transformer is in a small capacity, the first high-voltage winding and the second high-voltage winding are connected in series.
Specifically, the low-voltage winding comprises a first low-voltage winding and a second low-voltage winding, and when the low-voltage winding is in a high-capacity state, the first low-voltage winding and the second high-voltage winding are connected in parallel; and when the capacity is small, the first low-voltage winding and the second low-voltage winding are connected in series.
Furthermore, the transformer also comprises a voltage regulating winding, and the input end of the voltage regulating winding is communicated with the output end of the high-voltage winding. In same phase, connect the voltage regulation winding at two sets of coil common output ends, then each looks only need set up one and take a percentage, can carry out the voltage regulation simultaneously to two sets of coils, need not set up respectively to take a percentage two sets of coils, has reduced the quantity of taking a percentage, and the structure is simpler, and the voltage regulation is more stable.
The voltage regulating winding comprises a first voltage regulating winding, and the magnetic fluxes of the first voltage regulating winding and the high-voltage winding are opposite. The opposite magnetic flux setting is adopted, and the magnetic flux generated by the first voltage regulating winding offsets a part of magnetic flux of the high-voltage winding so as to achieve the effect of voltage reduction; compared with the traditional mechanical voltage regulation, the large difficulty that the number of voltage regulation turns between two groups of coils needs to be equal is ensured, the voltage boosting mode is safer through a counteracting mode of opposite magnetic fluxes, the voltage regulation setting structure is simpler, and the capacity regulating transformer of Dy/Dy can be realized;
the voltage regulating winding comprises a second voltage regulating winding, and the magnetic flux of the second voltage regulating winding is the same as that of the high-voltage winding. And the same magnetic flux setting is adopted, and the magnetic flux generated by the first voltage regulating winding is superposed on the magnetic flux of the high-voltage winding so as to achieve the effect of boosting.
In conclusion, the beneficial effects of the invention are as follows: the Dy/Dy capacity-regulating transformation mode is Dyn11 connection at low capacity, and has many advantages compared with the Dy/Yy capacity-regulating mode of Yyn0 connection at low capacity, such as the capacity of resisting unbalanced load is far stronger than that of Yyn0 connection; harmonic components can be reduced, zero sequence impedance is small, and the method is beneficial to removal of single-phase grounding short circuit faults and the like; in addition, the number of turns of windings of the Dy/Dy capacity-regulating transformation mode can be selected in a wide range, so that the design of the most economical and most economical materials can be selected, the economy is good, and the Dy/Dy capacity-regulating transformation mode is suitable for popularization; meanwhile, the vacuum arc extinguish chamber is arranged to cooperate with boosting, on-load voltage regulation is achieved, and voltage regulation can be achieved through the capacity regulating transformer in the Dy/Dy capacity regulating mode.
Drawings
Fig. 1 is a schematic circuit diagram of the high-side winding of the present invention at a low capacity.
Fig. 2 is a schematic circuit diagram of the high-side winding of the present invention in a large capacity.
Fig. 3 is a schematic circuit diagram of the low-side winding of the present invention at low capacity.
Fig. 4 is a schematic circuit diagram of the low-side winding of the present invention in a large capacity.
Fig. 5 is a schematic diagram of the operation timing sequence of each vacuum interrupter in the high-voltage side winding during the low-capacity to high-capacity conversion process of the present invention.
Fig. 6 is a schematic diagram of the operation timing sequence of each vacuum interrupter in the low-voltage side winding during the low-capacity to high-capacity conversion process of the present invention.
Fig. 7 is another schematic circuit diagram of the high side winding of the present invention at low capacity.
Fig. 8 is another schematic circuit diagram of the high side winding of the present invention in a high capacity.
Fig. 9 is a schematic diagram of the action timing sequence of each vacuum interrupter in the low-voltage side winding and the high-voltage side winding during the low-capacity to high-capacity conversion process of the present invention.
Fig. 10 is a schematic diagram of another circuit of the high side winding of the present invention in a large capacity.
Fig. 11 is a schematic circuit diagram of the capacitance-regulating switch of the present invention under the rated gear branch.
Fig. 12 is a schematic circuit diagram of the capacitance-regulating switch under the boost branch according to the present invention.
Fig. 13 is a schematic circuit diagram of the capacitance-regulating switch under the step-down branch according to the present invention.
Wherein K represents a vacuum arc-extinguishing chamber, a symbol 'day' represents that the vacuum arc-extinguishing chamber is in a closing state, and a symbol 'eye' represents that the vacuum arc-extinguishing chamber is in an opening state; r represents transition resistance; t represents time.
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.
A capacity-regulating and voltage-regulating transformer comprises a capacity-regulating switch for switching the large capacity and the small capacity of the transformer, wherein each phase of the transformer comprises a low-voltage winding arranged on a low-voltage side and a high-voltage winding arranged on a high-voltage side; the capacity regulating switch can be simultaneously connected with three-phase windings of the transformer, and each phase can be provided with one capacity regulating switch; specifically, when the capacity regulating switch drives the three-phase windings to be respectively in a Dy connection mode, the capacity of the transformer is in a high-capacity state; when the capacity regulating switch drives the three-phase windings to be respectively in a Dy connection mode, the capacity of the transformer is in a small capacity state;
specifically, as shown in fig. 1 and 2, the high-voltage winding includes a first high-voltage winding 11 and a second high-voltage winding 12, and when the high-voltage winding is in a large capacity, the first high-voltage winding and the second high-voltage winding are connected in parallel; and when the high-voltage transformer is in a small capacity, the first high-voltage winding and the second high-voltage winding are connected in series.
Specifically, as shown in fig. 3 and 4, the low-voltage winding includes a first low-voltage winding 21 and a second low-voltage winding 22, and when the high-capacity winding is in a large capacity, the first low-voltage winding and the second high-voltage winding are connected in parallel; when the low-voltage transformer is in a low capacity state, the first low-voltage winding and the second low-voltage winding are connected in series;
in this embodiment, as shown in fig. 1-2, the high-voltage winding in each phase includes two segments of coils, which can be switched between parallel connection and series connection, specifically, one of the branches includes a high-voltage vacuum interrupter Kg1 and a first high-voltage winding 11 connected in series, and the other branch includes a high-voltage vacuum interrupter Kg2 and a second high-voltage winding 12 connected in series; the first high-voltage winding 11 and the second high-voltage winding 12 are connected through a transition branch, the transition branch comprises a high-voltage transition vacuum arc-extinguishing chamber Kgg and a high-voltage transition series vacuum arc-extinguishing chamber Kgc which are connected in series, the high-voltage transition vacuum arc-extinguishing chamber Kgg is connected with a transition resistor Rg in parallel, and the specific connection mode refers to fig. 1 and 2;
the transition from fig. 1 to fig. 2 requires that the respective vacuum interrupters act in the following sequence:
switching on the gate by Kg1 and Kg 2;
kgc opening the brake;
the conversion from small capacity to large capacity at the high-voltage side can be realized; specific action sequences refer to fig. 5;
in this embodiment, as shown in fig. 3 and 4, the low-voltage winding in each phase includes two segments of coils, which can be switched between parallel connection and series connection, specifically, one of the branches includes a low-voltage vacuum interrupter Kd1 and a first low-voltage winding 21 connected in series, and the other branch includes a low-voltage vacuum interrupter Kd2 and a second low-voltage winding 22 connected in series; the first low-voltage winding 11 and the second low-voltage winding 12 are connected through a transition branch, the transition branch comprises a low-voltage transition vacuum arc-extinguishing chamber Kdg and a low-voltage transition vacuum arc-extinguishing chamber Kdc which are connected in series, the low-voltage transition vacuum arc-extinguishing chamber Kdg is connected with a transition resistor Rg in parallel, and the specific connection mode is shown in fig. 3 and 4;
the transition from fig. 1 to fig. 2 requires that the respective vacuum interrupters act in the following sequence:
kd1 and Kd2 are switched on;
opening with Kdc;
the conversion from small capacity to large capacity at the low-voltage side can be realized; specific action sequences refer to fig. 6;
the following can be obtained through experiments: the ratio of the rated capacity at high capacity to that at low capacity is about 4: 1; the ratio of the structural capacity is 2: 1; the ratio of the no-load loss to the load loss is about 4: 1.
As shown in fig. 5 and 6, specifically,
(1) the time between T1 and T3 is the arc quenching time on the high-voltage side; 22ms is more than T1-T3 is more than 10 ms;
the time between T1 and T2 is the arc quenching time on the low-voltage side; 20ms is more than T1-T2 is more than 8 ms.
(2) The time between T2 and T3 is used for preventing the possibility of transient overvoltage caused by asynchronous high and low voltage sides during series-parallel conversion, and T2 to T3 are approximately equal to 2 ms. Thus, it can be ensured that the sequence at the time of conversion is: when the low capacity is converted into the high capacity, the low-voltage side is firstly connected in parallel to reduce the number of turns and reduce the voltage, and then the high-voltage side is converted from series connection into parallel connection to recover the voltage; when the high capacity is changed to the low capacity, the high voltage side is connected in series and the voltage is reduced, and then the low voltage side is connected in series again and the voltage is recovered.
(3) The time between T3 and T4 is the transition time of the high-pressure side; 5ms is more than T3-T4 is more than 0;
the time between T2 and T4 is the transition time of the low-pressure side; 7ms is more than T2-T4 is more than 0.
The ratio of the no-load loss of the high capacity and the low capacity of the Dy/Dy capacity-regulating conversion mode is about 4:1, and the no-load loss of the Dy/Dy capacity-regulating conversion mode is lower than that of other capacity-regulating conversion modes when the Dy/Dy capacity-regulating conversion mode is in the low capacity, so that the Dy/Dy capacity-regulating conversion mode is particularly suitable for being applied to occasions with large power consumption peak-valley;
the Dy/Dy capacity modulation conversion mode is Dyn11 connection at low capacity, and has more advantages than the Dy/Yy capacity modulation mode which is Yyn0 connection at low capacity, such as the capacity of resisting unbalanced load is far stronger than that of Yyn0 connection; harmonic components can be reduced, zero sequence impedance is small, and the method is beneficial to removal of single-phase grounding short circuit faults and the like; in addition, the capacity modulation conversion mode of Dy/Dy has winding turns selected in a wide range, so that the design of the most economical and economical materials can be selected, the economical efficiency is good, and the capacity modulation conversion mode is suitable for popularization.
When the capacity of the transformer is relatively small (250 kVA or below), the high-voltage line is thin and is divided into two lines which cannot run. Circuit configurations as shown in fig. 7, 8 may be considered;
referring to fig. 9, the timing diagram of the operation of each vacuum interrupter is shown in fig. 7 to fig. 8;
furthermore, the invention also comprises a voltage regulating switch, wherein the voltage regulating switch comprises a rated vacuum arc-extinguishing chamber and a transition vacuum arc-extinguishing chamber connected with a transition resistor in parallel, and the rated vacuum arc-extinguishing chamber and the transition vacuum arc-extinguishing chamber are connected in series. Through having set up vacuum interrupter and come the cooperation to step up, realized on-load voltage regulation for regulation capacity transformer under the Dy/Dy transfers the appearance mode can realize the voltage regulation. (the specific structure of the tap changer will be described later)
Furthermore, the voltage regulating switch also comprises at least one voltage reducing vacuum arc-extinguishing chamber and at least one voltage boosting vacuum arc-extinguishing chamber; at least one voltage boosting branch and at least one voltage reducing branch adopt a vacuum arc extinguish chamber to realize voltage reduction, namely voltage boosting.
The input end of the voltage regulating winding is communicated with the output end of the high-voltage winding; the voltage regulating winding comprises a first voltage regulating winding and a second voltage regulating winding. In the same phase, the voltage regulating windings are connected at the common output ends of the two groups of coils, then each phase only needs to be provided with a tap of one voltage regulating winding, the voltage can be simultaneously regulated for the two groups of high-voltage winding coils, the taps do not need to be respectively arranged on the two groups of coils, the number of taps is reduced, the structure is simpler, and the voltage regulation is more stable.
Specifically, as shown in fig. 10 and 11, the circuit diagram of the high-voltage side winding in the large-capacity state; at this time, the first high-voltage winding 11 and the second high-voltage winding 12 are connected in parallel, and the common output end 31 of the two groups of coils after being connected in parallel is connected with the input end 41 of the voltage regulating winding 4, namely, the middle point of the voltage regulating winding is connected with the X (Y, Z) end of the high-voltage winding (main coil) to be used as a rated gear branch 41, and taps are respectively led out from the two sides of the middle point of the voltage regulating winding; the flux generated by the tapped coil on one side is opposite to (the flux is cancelled) that of the high-voltage winding (main coil), and the number of turns of the high-voltage winding (main coil) is reduced, wherein the tapped coil is the first voltage regulating winding 51; the flux generated by the tapping coil on the other side is the same as that of the high-voltage winding (the flux helps), the number of turns of the high-voltage winding (the main coil) is increased, and the tapping coil is a second voltage regulating winding 52; in the figure, the dotted end is used as a synonym end, and the unmarked end is a synonym end;
the opposite magnetic flux setting is adopted, and the magnetic flux generated by the first voltage regulating winding offsets a part of magnetic flux of the high-voltage winding so as to achieve the effect of voltage reduction; and the magnetic flux generated by the second voltage regulating winding is superposed on the magnetic flux of the high-voltage winding by the same magnetic flux setting so as to achieve the effect of boosting.
Compared with the traditional mechanical voltage regulation method which needs to ensure the great difficulty that the number of voltage regulation turns between two groups of coils is equal, the voltage reduction or voltage boosting method is safer by a counteracting mode of opposite magnetic fluxes or a mutual assisting mode of the same magnetic fluxes, and the voltage regulation structure is simpler, so that the capacity regulation transformer of Dy/Dy can be realized.
More specifically, at least one first voltage regulating tap 511 is arranged in the first voltage regulating winding 51, at least one second voltage regulating tap 521 is arranged in the second voltage regulating winding 52, the voltage regulating taps form each voltage regulating gear, taps are selected among the voltage regulating taps through one voltage regulating switch to realize the adjustment among the voltage regulating gears, as shown in fig. 11-13, the voltage regulating tap is a circuit schematic diagram of one voltage regulating mode, K represents a vacuum arc-extinguishing chamber, a symbol "day" represents that the vacuum arc-extinguishing chamber is in a closing state, and a symbol "eye" represents that the vacuum arc-extinguishing chamber is in an opening state; r represents transition resistance, and an arrow indicates a voltage transmission direction;
in this embodiment, the voltage regulating switch includes a rated level branch, a voltage boosting branch and a voltage reducing branch;
specifically, fig. 11 is a schematic diagram in a rated gear state, which includes a rated vacuum arc extinguish chamber Ke, a transition vacuum arc extinguish chamber Kg, and a transition resistor R; the voltage reduction branch comprises a first voltage regulation tap 511 and a voltage reduction vacuum arc extinguish chamber K1; the boosting branch comprises a second voltage regulating tap 521 and a boosting vacuum arc extinguish chamber K2;
specifically, fig. 11 is a schematic diagram in a boosting state, at this time, K2 is turned on, Ke and K1 are both in an off state, a second voltage regulating tap 521 provided at the same name end as the main coil is connected into a circuit, and magnetic flux generated by the second voltage regulating tap 521 assists the main coil to perform a voltage regulating function;
fig. 12 is a schematic diagram of the rated gear state, and from fig. 11 to fig. 12, the vacuum interrupter is required to operate according to the following sequence:
firstly, K2 is switched on, and Ke, K1 and Kg are all switched off;
then Ke is switched on;
then K2 is disconnected;
the voltage is smoothly adjusted from a boosting gear to a rated gear by switching on the voltage, the whole process is realized by adopting a vacuum arc extinguish chamber, a transition branch is designed, and the on-load voltage regulation without power failure is realized;
the schematic diagram of fig. 13 in the step-down gear state, adjusted from fig. 12 to fig. 13, requires that each vacuum interrupter operates according to the following sequence:
first, Ke and Kg are switched on, and K1 and K2 are both switched off;
then cutting off Kg;
then K1 is switched on;
finally, Ke is disconnected, the voltage is smoothly regulated from a rated gear to a voltage reduction gear, the whole process is realized by adopting a vacuum arc extinguish chamber, a transition branch is designed, and on-load voltage regulation without power failure is realized;
it should be noted that fig. 11-13 illustrate only one embodiment, that is, when there is only one first voltage regulating tap and one second voltage regulating tap combined, it is obvious that a plurality of first voltage regulating taps and a plurality of second voltage regulating taps can be provided as required; moreover, the action time sequence and the action implementation mode among the vacuum arc-extinguishing chambers can be realized by the cooperation of various existing mechanical structures, which is not the key point of the invention, and thus, the details are not repeated herein.
The capacity regulating transformer adopting the Dy/Dy capacity regulating mode has the advantages that because the high-voltage side winding of the capacity regulating transformer is two sections of coils with equal turns, when the voltage is regulated, the two sections of coils are respectively connected with the taps for voltage regulation, and because the number of turns of the voltage regulation of the two sections of coils is equal, the total number of the taps of three phases is 6, and the synchronous operation is ensured; to realize such voltage regulation, the voltage regulation structure is very complex and cannot be realized at present; therefore, the capacity regulating transformer in the Dy/Dy capacity regulating mode is not available on the market all the time, voltage reduction or voltage boosting is realized by skillfully arranging the voltage regulating windings and arranging the two groups of magnetic fluxes oppositely in a mode of canceling or assisting the magnetic fluxes; the number of taps is reduced, the adjustment mode is simple, the number of voltage-regulating taps is small, and the problem that the turns of two groups of coils are equal is not considered; the adoption of the vacuum arc-extinguishing chamber enables the voltage regulating process to be more stable and complete, the voltage regulating mode to be convenient and reliable, the capacity regulating transformer in the capacity regulating mode of Dy/Dy can be realized, and the capacity regulating transformer can be popularized and used on a large scale.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and 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 invention.
Claims (1)
1. A capacity-regulating and voltage-regulating transformer comprises a low-voltage winding, a high-voltage winding and a capacity-regulating switch, wherein when the capacity-regulating switch is in a high-capacity state, the capacity-regulating switch drives the winding to be in a Dy connection mode; when being in the low capacity state, the accent holds switch drive winding is Dy connection mode, its characterized in that: the voltage regulating switch comprises a rated vacuum arc extinguish chamber and a transition vacuum arc extinguish chamber connected with a transition resistor in parallel, wherein the rated vacuum arc extinguish chamber is connected with the transition vacuum arc extinguish chamber in series; the voltage regulating switch also comprises at least one voltage reducing vacuum arc-extinguishing chamber and at least one voltage boosting vacuum arc-extinguishing chamber; the arc extinguishing time of the high-voltage side is T1-T3, and 22ms is more than T1-T3 is more than 10 ms; the arc extinguishing time of the low-voltage side is T1-T2, and 20ms is more than T1-T2 is more than 8ms;
the high-voltage winding comprises a first high-voltage winding and a second high-voltage winding, and when the high-voltage winding is in a high-capacity state, the first high-voltage winding and the second high-voltage winding are connected in parallel; when the high-voltage transformer is in a low capacity state, the first high-voltage winding and the second high-voltage winding are connected in series;
the high-voltage winding in each phase comprises two sections of coils which can be switched between parallel connection and series connection, one branch comprises a high-voltage vacuum arc-extinguishing chamber and a first high-voltage winding which are connected in series, and the other branch comprises a high-voltage vacuum arc-extinguishing chamber and a second high-voltage winding which are connected in series; the first high-voltage winding and the second high-voltage winding are connected through a transition branch circuit, the transition branch circuit comprises a high-voltage transition vacuum arc-extinguishing chamber and a high-voltage transition series vacuum arc-extinguishing chamber which are connected in series, and the high-voltage transition vacuum arc-extinguishing chamber is connected with a transition resistor in parallel;
the low-voltage winding comprises a first low-voltage winding and a second low-voltage winding, and when the high-voltage winding is in a high-capacity state, the first low-voltage winding and the second high-voltage winding are connected in parallel; when the low-voltage transformer is in a low capacity state, the first low-voltage winding and the second low-voltage winding are connected in series;
the low-voltage winding in each phase comprises two sections of coils which can be switched between parallel connection and series connection, one branch comprises a low-voltage vacuum arc-extinguishing chamber and a first low-voltage winding which are connected in series, and the other branch comprises a low-voltage vacuum arc-extinguishing chamber and a second low-voltage winding which are connected in series; the first low-voltage winding and the second low-voltage winding are connected through a transition branch circuit, the transition branch circuit comprises a low-voltage transition vacuum arc-extinguishing chamber and a low-voltage transition series vacuum arc-extinguishing chamber which are connected in series, and the low-voltage transition vacuum arc-extinguishing chamber is connected with a transition resistor in parallel;
the input end of the voltage regulating winding is communicated with the output end of the high-voltage winding;
the voltage regulating winding comprises a first voltage regulating winding, and the magnetic fluxes of the first voltage regulating winding and the high-voltage winding are opposite;
the voltage regulating winding comprises a second voltage regulating winding, and the magnetic flux of the second voltage regulating winding is the same as that of the high-voltage winding;
in the same phase, the common output end of the two groups of coils is connected with a voltage regulating winding;
at least one first voltage regulating tap is arranged in the first voltage regulating winding, at least one second voltage regulating tap is arranged in the second voltage regulating winding, and the voltage regulating taps form each voltage regulating gear.
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| CN2017206988540 | 2017-06-15 | ||
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| CN201711080468.6A Active CN108063042B (en) | 2017-06-15 | 2017-11-06 | Capacity and voltage regulating transformer |
| CN201721464856.XU Expired - Fee Related CN207852460U (en) | 2017-06-15 | 2017-11-06 | A kind of capacitance-adjustable transformer |
| CN201721464863.XU Active CN207367770U (en) | 2017-06-15 | 2017-11-06 | A kind of new capacitance-adjustable transformer |
| CN201721464430.4U Expired - Fee Related CN207367769U (en) | 2017-06-15 | 2017-11-06 | A kind of capacity and pressure regulating transformer |
| CN201711080973.0A Active CN108063043B (en) | 2017-06-15 | 2017-11-06 | Capacity-adjustable transformer |
| CN201711080975.XA Active CN107799286B (en) | 2017-06-15 | 2017-11-06 | Capacity and voltage regulating transformer |
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| CN201721464863.XU Active CN207367770U (en) | 2017-06-15 | 2017-11-06 | A kind of new capacitance-adjustable transformer |
| CN201721464430.4U Expired - Fee Related CN207367769U (en) | 2017-06-15 | 2017-11-06 | A kind of capacity and pressure regulating transformer |
| CN201711080973.0A Active CN108063043B (en) | 2017-06-15 | 2017-11-06 | Capacity-adjustable transformer |
| CN201711080975.XA Active CN107799286B (en) | 2017-06-15 | 2017-11-06 | Capacity and voltage regulating transformer |
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|---|---|---|---|---|
| CN108063042B (en) * | 2017-06-15 | 2021-02-05 | 浙江宝威电气有限公司 | Capacity and voltage regulating transformer |
| CN109243792B (en) * | 2018-10-09 | 2021-04-09 | 浙江宝威电气有限公司 | A single-item is transferred and is held switch for transferring hold transformer |
| CN109637858B (en) * | 2018-12-12 | 2020-04-24 | 国网北京市电力公司 | Transformer switch group, transformer, and capacity adjusting method and device of transformer |
| CN109638939A (en) * | 2018-12-18 | 2019-04-16 | 辽宁恒顺新能源科技有限公司 | High-voltage rectifying transformer unit |
| CN109616294B (en) * | 2019-01-11 | 2024-05-24 | 浙江宝威电气有限公司 | Capacity-regulating transformer adopting three-phase linear arrangement Dy (Yy) connection method |
| CN109686546A (en) * | 2019-02-28 | 2019-04-26 | 北京博瑞莱智能科技集团有限公司 | A kind of capacity and pressure regulating winding, capacitance-adjustable transformer and pressure regulation method |
| CN110164726A (en) * | 2019-05-24 | 2019-08-23 | 国网河北省电力有限公司沧州供电分公司 | A kind of voltage regulating distribution transformer |
| CN110400688A (en) * | 2019-08-19 | 2019-11-01 | 江苏华鹏变压器有限公司 | Regulator and transformer |
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| CN104282424A (en) * | 2014-10-20 | 2015-01-14 | 合肥景喜电气设备有限公司 | Dry on-load capacity-adjusting transformer and capacity-voltage-adjusting transformer |
| CN105336481A (en) * | 2015-12-01 | 2016-02-17 | 浙江法拉迪电气有限公司 | 36-level high-precision capacitance and voltage adjusting transformer for distributing line |
| CN205428722U (en) * | 2015-12-21 | 2016-08-03 | 浙江宝威电气有限公司 | Transformer on -load voltage regulating switch |
| CN106128725A (en) * | 2016-08-17 | 2016-11-16 | 山东电工电气集团智能电气有限公司 | A kind of it is applicable to the capacitance-adjustable transformer that seasonal or period load variations is clearly demarcated |
| CN207367769U (en) * | 2017-06-15 | 2018-05-15 | 浙江宝威电气有限公司 | A kind of capacity and pressure regulating transformer |
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| CN105679518A (en) * | 2016-04-14 | 2016-06-15 | 上海中莱特子金电气股份有限公司 | Dry-type loaded permanent-magnet mechanism adjustable-capacity transformer |
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- 2017-11-06 CN CN201711080468.6A patent/CN108063042B/en active Active
- 2017-11-06 CN CN201721464856.XU patent/CN207852460U/en not_active Expired - Fee Related
- 2017-11-06 CN CN201721464863.XU patent/CN207367770U/en active Active
- 2017-11-06 CN CN201721464430.4U patent/CN207367769U/en not_active Expired - Fee Related
- 2017-11-06 CN CN201711080973.0A patent/CN108063043B/en active Active
- 2017-11-06 CN CN201711080975.XA patent/CN107799286B/en active Active
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| CN104282424A (en) * | 2014-10-20 | 2015-01-14 | 合肥景喜电气设备有限公司 | Dry on-load capacity-adjusting transformer and capacity-voltage-adjusting transformer |
| CN105336481A (en) * | 2015-12-01 | 2016-02-17 | 浙江法拉迪电气有限公司 | 36-level high-precision capacitance and voltage adjusting transformer for distributing line |
| CN205428722U (en) * | 2015-12-21 | 2016-08-03 | 浙江宝威电气有限公司 | Transformer on -load voltage regulating switch |
| CN106128725A (en) * | 2016-08-17 | 2016-11-16 | 山东电工电气集团智能电气有限公司 | A kind of it is applicable to the capacitance-adjustable transformer that seasonal or period load variations is clearly demarcated |
| CN207367769U (en) * | 2017-06-15 | 2018-05-15 | 浙江宝威电气有限公司 | A kind of capacity and pressure regulating transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108063042A (en) | 2018-05-22 |
| CN108063043B (en) | 2020-10-16 |
| CN207367769U (en) | 2018-05-15 |
| CN207852460U (en) | 2018-09-11 |
| CN107799286A (en) | 2018-03-13 |
| CN207367770U (en) | 2018-05-15 |
| CN108063043A (en) | 2018-05-22 |
| CN107799286B (en) | 2020-10-16 |
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