CN110190788A - A kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion - Google Patents
A kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion Download PDFInfo
- Publication number
- CN110190788A CN110190788A CN201910634395.3A CN201910634395A CN110190788A CN 110190788 A CN110190788 A CN 110190788A CN 201910634395 A CN201910634395 A CN 201910634395A CN 110190788 A CN110190788 A CN 110190788A
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- Prior art keywords
- tap
- pressure regulation
- branch
- transition
- switch unit
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
- H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
Abstract
The present invention relates to Allocation transformer field transformers, more particularly to a kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion, including main winding, polarity reversing switch, tap-changing windings, transition switch unit, voltage rating branch, several pressure regulation branches；Polarity reversing switch is arranged in the technical program between main winding and tap-changing windings, connects end by adjusting polarity reversing switch independence contact, realizes positive-negative voltage-regulation；One end of each pressure regulation branch is connected respectively in the two end taps and each centre tap of tap-changing windings；Other end interleaved adjacent and be unified into two groups, connect respectively with two input terminals of transition switch unit, the input terminal of voltage rating branch is connect with main winding output end, and voltage rating branch output end is connect with regulating circuit output end.The beneficial effects of the invention are as follows the on-off frequency for reducing on-off switch, increases the service life of corresponding tap changer and during pressure regulation, transient voltage is not necessarily to trip stop pressure regulation with pressure regulation gear change.
Description
Technical field
The present invention relates to Allocation transformer field transformers, in particular to a kind of transformer on-load voltage regulating circuit.
Background technique
Application No. is 201610121960, title are as follows: " a kind of permanent magnet vacuum on-load voltage regulating switch, transformer and have load
A kind of two vacuum interrupters of application are provided in the patent of pressure regulation method " separately constitutes having for major loop and transition loop structure
Voltage adjustment of on-load method.The drip irrigation device is: when operating normally, major loop vacuum interrupter is connected, and major loop, which is in, to be connected
State, transition circuit vacuum interrupter disconnect, and transition circuit is in an off state, and determine electricity by the tap-changing windings that major loop accesses
The external pressure supply gear in road.In gear switch, first be closed transition circuit vacuum interrupter, transition circuit in an ON state, so
Major loop vacuum interrupter is disconnected afterwards, and major loop is in an off state.At this point, Gear-shift switch is completed to change in no current
Gear is generated without electric arc.Transition circuit provides transient voltage in gear switch for circuit, guarantees that circuit will not interrupt external confession
Voltage.But the multi gear regulating circuit according to this method design has the following insufficient:
1, each gear switch is primary, and major loop vacuum interrupter will open primary unification time, and transition circuit vacuum interrupter is also wanted
Unification time is opened primary.Major loop, transition circuit vacuum interrupter are as the highest device of on-off frequency in circuit, on-off number
The upper limit determines the service life of the tap changer according to the circuit design.According to standard requirements, the machinery of on-load voltage regulating switch
Service life will reach 500,000 times, i.e. tap changer carries out 500,000 in the case that not charged and whole tapping ranges are all used in contact
Secondary tap change operation.According to the regulating circuit, the on-load voltage regulating switch of 5 gears does pressure regulation circulation, major loop and mistake
4*50=2,000,000 will be acted by crossing circuit.To the on-load voltage regulating switch of 9 gears, major loop and transition circuit will act 8*
50=4,000,000 times.The mechanical life of vacuum interrupter is required between 80 ~ 1,200,000 times at this stage.As it can be seen that according to pressure regulation electricity
The tap changer of road production, mechanical life is an acid test, and reckoning is the mechanical life that standard requirements are not achieved.
2, transition circuit is that fixation connects on a certain tap, and the pressure regulation of any gear will briefly return to this fixation point
It on connector, is then transferred on the gear for needing pressure regulation again, is commonly called as trip stop pressure regulation.It is very high that the instantaneous variation of voltage can generate amplitude
The instantaneous transition rate of switching overvoltage, voltage is higher, and the Overvoltage Amplitude of generation is higher, the electronic product danger being docked in power grid
Evil is very big.So standard is not allow trip stop pressure regulation.
Application No. is: 201721680735.9, title are as follows: " a kind of load voltage-regulating method using commutator " it is special
In benefit, improve patent 201610121960: the structure for tapping coil is simpler；Transition circuit be connected on specified shelves without
It is the main winding end of transformer, so that the fluctuation of voltage is smaller when shift.The patent has multiple deformations.But basic two o'clock with
Patent 201610121960 is the same: 1, whenever gear switch is primary, major loop vacuum interrupter will open primary unification time, mistake
Secondary open once will be unified by crossing circuit also.Its on-off maximum number of times determines the use longevity of the tap changer according to the circuit design
Life.2, its transition circuit is fixedly connected on main winding tap, and it is that standard does not allow that when pressure regulation, which is still trip stop pressure regulation,.
In 201820286271 .1 of patent, patent 201721680735.9 is improved again, increases transition circuit
Selection switch (quantity is different according to pressure regulation gear and becomes, 5 grades 2 transition loop choice switches of needs).Transition circuit is not
It is fixedly connected on the principal tapping gear of tap-changing windings, but is switched by transition loop choice, is become therewith with the variation of gear
Change.But " whenever gear switch is primary, major loop vacuum interrupter will open primary unification time, and transition circuit, which will also be unified, time opens one
It is secondary.Its on-off maximum number of times determines the service life of the tap changer according to the circuit design " this defect do not change still
Become.And with the increase of switch position quantity, transition loop choice number of switches also increases, and construction of switch tends to be complicated.
Summary of the invention
The purpose of the present invention is: new circuit structure is designed, the design in transition circuit and major loop is replaced, reduces pressure regulation
In journey in circuit vacuum interrupter on-off frequency, to achieve the purpose that increase the service life of corresponding tap changer；And
During pressure regulation, the gear for allowing transient voltage to switch with transition is different and different, reduces voltage fluctuation when pressure regulation, is not in
The problem of trip stop pressure regulation；Positive-negative voltage-regulation function is added in on-load voltage regulation circuit simultaneously, is realized under the premise of identical gear number,
The number of tap-changing windings is reduced, simplifies transformer device structure, reduces the purpose of manufacturing cost.
In order to achieve the above-mentioned object of the invention, the technical scheme is that
A kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion, including main winding, polarity reversing switch,
Tap-changing windings, transition switch unit, voltage rating branch and several pressure regulation branches；
The tap-changing windings are sequentially connected by the N section coil head and the tail of coiling in the same direction and are formed, and tap-changing windings include two end taps
With N-1 centre tap, the input terminal of main winding input termination regulating circuit, main winding output end connects polarity reversing switch
Public contact；Two independent contacts of polarity reversing switch are separately connected two end taps of tap-changing windings；
The transition switch unit includes two input terminals and an output end, and the output end of transition switch unit is as pressure regulation electricity
The output end on road；Connect parallel with one another one between the first input end of transition switch unit and the output end of transition switch unit
Second input terminal of a on-off switch and transition resistance, transition switch unit connect (transition with the output end of transition switch unit
Switch unit output end is also regulating circuit output end).
Preferably, the transition switch unit is composed in parallel by transition resistance and an on-off switch, transition switch unit
First input end connect the first end of transition resistance and the first end of on-off switch, the second input terminal of transition switch unit also serves as
Transition switch unit output end, the output end of transition switch unit connect the second end of transition resistance and the second end of on-off switch.
Preferably, the on-off switch in transition switch unit selects vacuum interrupter, and electric arc will not pollute transformer oil.
Every pressure regulation branch one on-off switch of road series connection, one end of each pressure regulation branch is connected respectively to tap-changing windings
In two end taps and each centre tap；Each pressure regulation branch other end interleaved adjacent and be unified into two groups, respectively with
Two input terminals of transition switch unit connect；Preferably, the on-off switch selects vacuum interrupter, and electric arc will not pollute change
Depressor oil.
Voltage rating branch one on-off switch of road series connection, one end of voltage rating branch is connect with main winding output end；
The other end connect with the either end of transition switch unit and is ok.Preferably, voltage rating branch is connected to transition switch unit
First input end, output electric current should not be by the switch in transition switch unit when specified shelves；On-off switch preferably uses vacuum
Arc-chutes, electric arc will not pollute transformer oil.
Specifically, each voltage regulation coil of tap-changing windings joins end to end, the number foundation of voltage regulation coil is wanted to set in tap-changing windings
The gear of the regulating circuit of meter determines.Five grades of regulating circuits, tap-changing windings are made of two voltage regulation coils；Seven grades of regulating circuits,
Tap-changing windings are made of three voltage regulation coils.Tap-changing windings can connect the head end into transformer main winding, middle part or tail
End forms end, middle part or neutral point pressure regulation.
The voltage regulation coil both ends are respectively provided with a tap-changing windings tap, wherein adjacent voltage regulation coil end shares a pumping
Head, the voltage regulation coil number for both having formed tap-changing windings add one to be tap-changing windings number of taps.From one end of entire tap-changing windings
It is 1,2 to n that each voltage regulation coil tap numbers are successively defined to the other end.1 tap of number and number n tap be the pressure regulation around
Two end taps of group.
The item number of the pressure regulation branch is consistent with the number of tap-changing windings tap, one end of each pressure regulation branch with one
Corresponding tap-changing windings tap is connected.
Defining the pressure regulation branch that connect with No. 1 tap is No. 1 branch, due to the pressure regulation branch being connect with No. 2 taps be No. 2
Branch, and so on, until n branch.
There are two types of connection types for the other end of each pressure regulation branch:
Connection type one: the second input terminal of the other end connection transition switch unit of the pressure regulation branch of all odd numbers；It is all
The first input end of the other end connection transition switch unit of the pressure regulation branch of even number.
Connection type two: the second input terminal of the other end connection transition switch unit of the pressure regulation branch of all even numbers；
The first input end of the other end connection transition switch unit of the pressure regulation branch of all odd numbers.
Since the second input terminal of transition switch unit is connect with the output end of entire regulating circuit, so definition connected
Cross the second input terminal of switch unit pressure regulation branch be direct-connected pressure regulation branch, due to transition switch unit first input end with
A resistance in parallel and vacuum extinction cell structure are in series between the output end of regulating circuit, therefore it is single to define connection transition switching
The pressure regulation branch of first first input end is indirectly connected pressure regulation branch.
In connection type one, the pressure regulation branch of odd number is direct-connected pressure regulation branch；The pressure regulation branch of even number is non-straight
Even pressure regulation branch.
In connection type two, the pressure regulation branch of odd number is indirectly connected pressure regulation branch；The pressure regulation branch of even number is straight
Even pressure regulation branch.
Polarity reversing switch is in upper end on-state, and the tap-changing windings polarity for accessing circuit is identical as main winding polarity,
Circuit can carry out positive pressure regulation；Polarity reversing switch is in lower end on-state, accesses tap-changing windings polarity and the master of circuit
Winding is on the contrary, circuit can carry out antipole pressure regulation.
During positive pressure regulation or during antipole pressure regulation, selection is individually closed the on-off switch of any pressure regulation branch
The tap-changing windings of access circuit, corresponding different gear can be adjusted.
The on-off switch of any indirectly connected pressure regulation branch is in closed state, while the on-off switch of transition switch unit
In an ON state, then regulating circuit is in the normal operating condition of respective notch at this time, and defining this state is indirectly connected electricity
The normal operating conditions on road.
The on-off switch of direct-connected pressure regulation branch is in closed state, while the on-off switch of transition switch unit is in and disconnects
State, regulating circuit is in the normal operating condition of respective notch at this time, defines the normal work that this state is direct-connected circuit
State.
From circuit structure, technical solution of the present invention, a pressure regulation branch is direct-connected pressure regulation branch, adjacent thereto
Pressure regulation branch is necessarily indirectly connected pressure regulation branch.Multi gear transformer regulating circuit under the program, each pressure regulation branch necessarily with
This alternate form connection.
Regulating circuit under the technical solution, so-called gear switch are exactly to work normally shape from a pressure regulation branch
State is switched to another pressure regulation branch normal operating conditions adjacent thereto.It is by direct-connected pressure regulation branch normal operating conditions
Be switched to indirectly connected pressure regulation branch normal operating conditions or be switched to from indirectly connected pressure regulation branch normal operating conditions it is direct-connected
Pressure regulation branch normal operating conditions.
From circuit structure, as long as the on-off switch of transition switch unit is in an off state, always transition resistance
Be series between two adjacent pressure regulation branches, it ensure that adjacent two pressure regulation branches simultaneously in an ON state when, electricity
Road will not be short-circuit, allows two pressure regulation branches while being in energized state, it ensure that during pressure regulation, it will not interruption of power supply.
So as long as the on-off switch in transition switch unit is in an off state, so that it may start pressure regulation.
It is switched to indirectly connected pressure regulation branch normal operating conditions if it is from direct-connected pressure regulation branch normal operating conditions, due to
Direct-connected pressure regulation branch is in normal operating conditions, and the on-off switch of transition switch unit has been in an off state at this time, so
As long as closed pair answers indirectly connected pressure regulation branch on-off switch, it is then turned off corresponding direct-connected pressure regulation branch on-off switch, is then connected
Transition switch unit on-off switch so then completes a gear switch.
It is switched to direct-connected pressure regulation branch normal operating conditions if it is from indirectly connected pressure regulation branch normal operating conditions, due to
Indirectly connected branch is in normal operating conditions, and transition switch unit on-off switch in an ON state, first disconnect transition switching
Unit on-off switch, then closed pair answers direct-connected pressure regulation branch on-off switch, is then turned off corresponding indirectly connected branch on-off switch,
So complete a gear switch.
It is not unique in connection type so technical solution of the present invention, if each pressure regulation branch meet it is direct-connected with it is non-
The mode of direct-connected alternately connection, can be realized identical technical effect.Above two connection type can be considered under same invention
Two preferred embodiments.
So the every switching of gear is primary using the transformer that the present invention designs, the on-off switch in transition switch unit is only
Experience is once opened or is once closed.Gear continuously switches twice, and the on-off switch in transition switch unit just opens and closes once.And show
There are technology, gear of every switching, the vacuum interrupter in major loop transition circuit will respectively open primary unification time.
It may be concluded that the technical solution is compared with the prior art, and on the one hand under the premise of identical times of pressure regulation, energy
Reduce the opening/closing frequency of on-off switch half.On the other hand, technical solution of the present invention can allow the pressure regulation branch of previous gear to be
The pressure regulation branch of adjacent gear positions provides transient voltage, and such transient voltage can always become therewith with the difference of pressure regulation gear
Change.
Except positive pressure regulation and antipole pressure regulation operation, there are also switching from positive pressure regulation to antipole pressure regulation, or from antipole
Pressure regulation switches to positive pressure regulation.In handoff procedure, reverse of polarity change-over switch, from upper end connect be transformed to lower end connect or
Person connects from lower end becomes upper end connection, and in handoff procedure, each pressure regulation branch is all necessarily in off-state, can not be pressure regulation
Circuit provides transient voltage.
Voltage rating branch gets around polarity reversing switch and is directly connected between main winding tap and regulating circuit output end,
The on-off switch of closing rating voltage branch, voltage rating branch in an ON state, that is, can guarantee and mutually cut in positive-negative voltage-regulation
When changing, circuit does not interrupt pressure supply.
Preferably, the transition switch unit on-off switch uses vacuum interrupter, electric arc will not pollute transformer oil；
Preferably, with pressure regulation branch and voltage rating branch road, concatenated on-off switch is all made of vacuum interrupter respectively,
Electric arc will not pollute transformer oil.
Alternatively, series connection one the on from the second input terminal to the route of output end in the transition switch unit
One vacuum interrupter, the second vacuum interrupter of connecting from route of the first input end through transition resistance to output end, is adjusted simultaneously
Concatenated on-off switch is all made of common on-off switch respectively for pressure branch and voltage rating branch road.
Further, as a kind of selection, a kind of staggered-parallel-type multi gear transformer on-load voltage regulating electricity with dipole inversion
Road, including main winding, polarity reversing switch, tap-changing windings, transition switch unit, voltage rating branch and three pressure regulation branch
Road；The tap-changing windings are sequentially connected and are formed by two sections of voltage regulation coils head and the tail of coiling in the same direction, tap-changing windings include upper end tap,
Totally three taps, the input terminal of main winding input termination regulating circuit, main winding output end connect pole for middle-end tap, lower end tap
The public contact of property change-over switch；Two independent contacts of polarity reversing switch are separately connected the upper end tap of tap-changing windings under
Hold tap；
The transition switch unit includes two input terminals and an output end, the first input end of transition switch unit and transition
The transition resistance and transition element vacuum interrupter for connecting parallel with one another between the output end of switch unit, transition switch unit
The output end of second input terminal and transition switch unit is connected directly, and the second input terminal of transition element is transition switch unit
Output end is also the output end of regulating circuit, the unification of three ends.
Three pressure regulation branches are with each vacuum interrupter of connecting in voltage rating branch road, the pressure regulation connecting with upper end tap
Branch, the pressure regulation branch other end are connected with transition switch unit first input end；The pressure regulation branch being connect with middle-end tap,
The pressure regulation branch other end is connected with the second input terminal of transition switch unit；The pressure regulation branch being connect with lower end tap, institute
The pressure regulation branch other end is stated to be connected with the first input end of transition switch unit.
The voltage rating branch input is connect with main winding output end, voltage rating branch output end and regulating circuit
Output end connection.
Alternatively, a kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion, including
Main winding, polarity reversing switch, tap-changing windings, transition switch unit, voltage rating branch and three pressure regulation branches；The tune
Pressure winding is sequentially connected and is formed by two sections of voltage regulation coils head and the tail of coiling in the same direction, tap-changing windings include upper end tap, middle-end tap,
Open by totally three taps, the input terminal of main winding input termination regulating circuit, main winding output end connection dipole inversion for lower end tap
The public contact closed；Two independent contacts of polarity reversing switch are separately connected the upper end tap and lower end tap of tap-changing windings；
The transition switch unit includes two input terminals and an output end, the first input end of transition switch unit and transition
The transition resistance and transition element vacuum interrupter for connecting parallel with one another between the output end of switch unit, transition switch unit
The output end of second input terminal and transition switch unit is connected directly, and the second input terminal of transition element is transition switch unit
Output end is also the output end of regulating circuit, the unification of three ends.
Three pressure regulation branches are with each vacuum interrupter of connecting in voltage rating branch road, the pressure regulation connecting with upper end tap
Branch, the pressure regulation branch other end are connected with the second input terminal of transition switch unit；The pressure regulation branch being connect with middle-end tap,
The pressure regulation branch other end is connected with the first input end of transition switch unit；The pressure regulation branch being connect with lower end tap, institute
The pressure regulation branch other end is stated to be connected with the second input terminal of transition switch unit；
The input terminal of the voltage rating branch is connect with main winding output end, and voltage rating branch output end and regulating circuit are defeated
Outlet connection.
In conclusion voltage fluctuation when the transformer of Technical Design has long service life, transformation according to the present invention
Small, output voltage quality height halves, the low advantage of manufacturing cost with gear tap-changing windings number.
In the present invention, the input terminal with output end is done for the clear connection relationship for stating each composition part of circuit
Definition out, wherein " input " and " output " is only used for distinguishing different connecting pins, do not represent electric current or signal flowing or
Direction of transfer.
Detailed description of the invention
Fig. 1 is that have to carry positive-negative voltage-regulation circuit diagram using five grades of one kind of technical solution of the present invention.
Fig. 2 is that five grades under another connection type using technical solution of the present invention have load positive-negative voltage-regulation circuit theory
Figure.
Specific embodiment
The design feature to positive-negative voltage-regulation circuit of the present invention and working principle are made furtherly with reference to the accompanying drawing
It is bright.
Shown in Figure 1 is five grades of transformer regulating circuit diagrams of one kind under this aspect technical solution, the circuit by
Main winding, tap-changing windings, voltage rating branch, transition switch unit, three pressure regulation branch compositions.
The transition switch unit includes first input end T1, the second input terminal T2, output end Xb and is series at first
Vacuum interrupter D0 and transition resistance R parallel-connection structure between input terminal T1 and output end Xb.
First voltage regulation coil L1, the second voltage regulation coil L2 join end to end and form tap-changing windings, and voltage regulation coil both ends are respectively provided with
One tap-changing windings tap, wherein adjacent voltage regulation coil end shares a tap-changing windings tap, two voltage regulation coils are equipped with altogether
Three tap-changing windings taps are upper end tap X1, middle-end tap X2, lower end tap X3 respectively.
The public contact of the polarity reversing switch KaKb is connected with main winding output end Xa, and two of polarity reversing switch
Independent contact is connected with the upper end tap X1 of tap-changing windings and lower end tap X3 respectively.
On-off switch D1, on-off switch D2, on-off switch D3, on-off switch Ke are vacuum interrupters.
The one end the on-off switch D1 is connected with tap-changing windings upper end tap X1, and the other end and transition switch unit second are defeated
Enter T2 is held to connect, exist as a pressure regulation branch.
The one end the on-off switch D2 is connected with tap-changing windings middle-end tap X2, and the other end and transition switch unit first are defeated
Enter T1 is held to connect, be connected by vacuum interrupter D0 with the parallel-connection structure of resistance R with regulating circuit output end Xb, is adjusted as one
Branch is pressed to exist.
The one end the on-off switch D3 is connected with tap-changing windings lower end tap X3, and the other end and transition switch unit second are defeated
Enter T2 is held to connect, exist as a pressure regulation branch.
The voltage rating branch road series connection on-off switch Ke, voltage rating branch one end and main winding output end Xa
Connection, the other end are connect with the second input terminal of transition switch unit T2.
Polarity reversing switch, each on-off switch assembled state and each gear of regulating circuit it is corresponding as follows:
1 grade: Ka conjunction D3 closes D0 disconnection tap-changing windings L1, L2 and just accesses circuit
2 grades: Ka conjunction D2 closes DO conjunction tap-changing windings L1 and just accesses circuit
3 grades: Ka conjunction D1 closes D0 disconnection tap-changing windings L1, L2 and does not access circuit
3 grades: Kb conjunction D3 closes D0 disconnection tap-changing windings L1, L2 and does not access circuit
4 grades: Kb conjunction D2 closes D0 conjunction tap-changing windings L2 and is reversely connected into circuit
5 grades: Kb conjunction D1 closes D0 disconnection tap-changing windings L1, L2 and is reversely connected into circuit
Pressure regulation process is as follows:
At one grade, in an ON state, on-off switch D3 is in closed state, transition switch unit at the end polarity reversing switch Ka
Vacuum interrupter D0 is in an off state, and tap-changing windings L1, L2 just access circuit.
From one grade to when two grades of switchings, be first closed on-off switch D2, one grade of two grades of circuit connection together, transition resistance
R protects circuit not short-circuit.It is then turned off on-off switch D1, one grade of circuit is in an off state.Then it is closed vacuum interrupter D0,
Circuit is completed from one grade to two grades of switching.
When switching from two grades to third gear, transition switch unit vacuum interrupter D0 is first disconnected, on-off switch is then closed
D3, is then turned off on-off switch D2, and circuit is completed from two grades of switchings to third gear.
When switching from third gear to fourth gear, first to complete first to be closed on-off from positive pressure regulation to the switching of antipole pressure regulation
Switch Ke, voltage rating branch is in an ON state.It is then turned off on-off switch D1, polarity reversing switch KaKb is in power-off shape
State, in this state, switch polarity change-over switch is led to polarity reversing switch by the logical Kb termination that is switched to of Ka termination.Then it closes
On-off switch D3 is closed, the positive pressure regulation of on-off switch Ke. completion is disconnected and is changed to crush-cutting is demodulated, during which circuit is constantly in third gear.
When switching from third gear to fourth gear, it is closed on-off switch D2, disconnects on-off switch D3, it is single to be then closed transition switching
First vacuum interrupter D0, circuit complete the switching from third gear to fourth gear.
From fourth gear to when five grades of switchings, transition switch unit vacuum interrupter D0 is first disconnected, on-off switch is then closed
D1, is then turned off on-off switch D2, and circuit is completed from fourth gear to five grades of switching.
With five grades of regulating circuits that the prior art designs, four tap-changing windings are needed, and apply the present invention five grades of electricity of design
Road only needs 2 tap-changing windings, reduces the tap-changing windings usage amount of half, reduces corresponding production cost.It originally sets simultaneously
The problem of meter circuit transient voltage during pressure regulation changes with pressure regulation gear, and voltage fluctuation is small, is not in trip stop pressure regulation；
The prior art completes the once pressure regulation process by one grade to five grades, needs to carry out four gear switches, major loop and voltage rating
Branch vacuum interrupter will close four times and open four times.And technical solution of the present invention, the highest vacuum of on-off frequency is gone out in circuit
Arc chamber only needs to close opens the on-off number for reducing half twice twice, substantially increases the effective using secondary of corresponding transformer
Number.
Be with pressure regulation method of the present invention design five grades have carry positive-negative voltage-regulation transformer have at low cost, long service life,
The high advantage of quality of voltage.
Shown in Figure 2 is five grades of transformer regulating circuit diagrams of another kind under this aspect technical solution, the circuit
It is made of main winding, tap-changing windings, voltage rating branch, transition switch unit, three pressure regulation branches.
The transition switch unit includes first input end T1, the second input terminal T2, output end Xb, is series at the first input
Hold the vacuum interrupter D0 and transition resistance R parallel-connection structure between T1 and output end Xb.
First voltage regulation coil L1, the second voltage regulation coil L2 join end to end and form tap-changing windings, and voltage regulation coil both ends are respectively provided with
One tap-changing windings tap, wherein adjacent voltage regulation coil end shares a tap-changing windings tap, two voltage regulation coils are equipped with altogether
Three tap-changing windings taps are upper end tap X1, middle-end tap X2, lower end tap X3 respectively.
The public contact of the polarity reversing switch KaKb is connected with main winding output end Xa, and two of polarity reversing switch
Independent contact is connected with the upper end tap X1 of tap-changing windings and lower end tap X3 respectively.
On-off switch D1, on-off switch D2, on-off switch D3, on-off switch Ke are vacuum interrupters.
The one end the on-off switch D1 is connected with tap-changing windings upper end tap X1, and the other end and transition switch unit first are defeated
Enter T1 is held to connect, be connected by vacuum interrupter D0 with the parallel-connection structure of resistance R with regulating circuit output end Xb, is adjusted as one
Branch is pressed to exist.
The one end the on-off switch D2 is connected with tap-changing windings middle-end tap X2, and the other end and transition switch unit second are defeated
Enter T2 is held to connect, exist as a pressure regulation branch.
The one end the on-off switch D3 is connected with tap-changing windings lower end tap X3, and the other end and transition switch unit first are defeated
Enter T1 is held to connect, be connected by vacuum interrupter D0 with the parallel-connection structure of resistance R with regulating circuit output end Xb, is adjusted as one
Branch is pressed to exist.
The voltage rating branch road series connection on-off switch Ke, voltage rating branch one end and main winding output end Xa
Connection, the other end are connect with the second input terminal of transition switch unit T2.
Polarity reversing switch, each branch on-off switch assembled state and each gear of regulating circuit it is corresponding as follows:
1 grade: Ka conjunction D3 closes D0 conjunction tap-changing windings L1, L2 and just accesses circuit
2 grades: Ka conjunction D2 closes DO disconnection tap-changing windings L1 and just accesses circuit
3 grades: Ka conjunction D1 closes D0 conjunction tap-changing windings L1, L2 and does not access circuit
3 grades: Kb conjunction D3 closes D0 conjunction tap-changing windings L1, L2 and does not access circuit
4 grades: Kb conjunction D2 closes D0 disconnection tap-changing windings L2 and is reversely connected into circuit
5 grades: Kb conjunction D1 closes D0 conjunction tap-changing windings L1, L2 and is reversely connected into circuit
Pressure regulation process is as follows:
At one grade, in an ON state, on-off switch D3 is in closed state, transition switch unit at the end polarity reversing switch Ka
Vacuum interrupter D0 is in closed state, and tap-changing windings L1, L2 just access circuit.
From one grade to when two grades of switchings, transition switch unit vacuum interrupter D0 is first disconnected, on-off switch is then closed
D2, together, transition resistance R protects circuit not short-circuit to one grade of two grades of circuit connection.It is then turned off on-off switch D3, one grade of circuit
It is in an off state.It is then turned off vacuum interrupter D0, circuit is completed from one grade to two grades of switching.
When switching from two grades to third gear, it is first closed on-off switch D1, on-off switch D2 is then turned off, is then closed transition
Switch unit vacuum interrupter D0, circuit are completed from two grades of switchings to third gear.
When switching from third gear to fourth gear, first to complete first to be closed on-off from positive pressure regulation to the switching of antipole pressure regulation
Switch Ke, voltage rating branch is in an ON state.It is then turned off on-off switch D1, polarity reversing switch KaKb is in power-off shape
State, in this state, switch polarity change-over switch connect end.Polarity reversing switch is led to by the logical Kb termination that is switched to of Ka termination.
Then it is closed on-off switch D3, the positive pressure regulation of on-off switch Ke. completion is disconnected and is changed to crush-cutting is demodulated, during which circuit is constantly in three
Shelves.
When switching from third gear to fourth gear, transition switch unit vacuum interrupter D is first disconnected, on-off switch is then closed
D2, disconnects on-off switch D3, and circuit completes the switching from third gear to fourth gear.
From fourth gear to when five grades of switchings, it is closed on-off switch D1, is then turned off on-off switch D2, is then closed transition and cut
Change unit vacuum interrupter D0, circuit is completed from fourth gear to five grades of switching.
Fig. 2 circuit is compared with Fig. 1 circuit, although connection type is different, technical effect having the same.Compared to existing
Technology equally realizes the tap-changing windings usage amount for reducing half, reduces the purpose of corresponding production cost；The design simultaneously
Circuit transient voltage during pressure regulation changes, no trip stop pressure regulation problem with pressure regulation gear；Vacuum interrupter on-off in circuit
Frequency is low.
Claims (8)
1. a kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion, including main winding, dipole inversion are opened
Pass, tap-changing windings, transition switch unit, voltage rating branch and several pressure regulation branches；
It is formed it is characterized in that, the tap-changing windings are sequentially connected by the N section coil head and the tail of coiling in the same direction, tap-changing windings include two
A end tap and N-1 centre tap, the input terminal of main winding input termination regulating circuit, main winding output end connect polarity
The public contact of change-over switch；Two independent contacts of polarity reversing switch are separately connected two end taps of tap-changing windings；
The transition switch unit includes two input terminals and an output end, and the output end of transition switch unit is as pressure regulation electricity
The output end on road；It connects between the first input end of transition switch unit and the output end of transition switch unit mistake parallel with one another
Resistance and transition switch unit on-off switch are crossed, the second input terminal of transition switch unit and the output end of transition switch unit connect
It connects；
One end of each pressure regulation branch is connected respectively in the two end taps and each centre tap of tap-changing windings；It is each described
Pressure regulation branch other end interleaved adjacent and be unified into two groups, connect respectively with two input terminals of transition switch unit；
Each item pressure branch and voltage rating branch are connected an on-off switch respectively on the road；
One on-off switch of the voltage rating branch road series connection, one end of voltage rating branch is connect with main winding output end；
The other end connect with the either end of transition switch unit and is ok.
2. special according to a kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion described in claim 1
Sign is that the transition switch unit is composed in parallel by transition resistance and an on-off switch, and the first of transition switch unit is defeated
Enter to terminate the first end of transition resistance and the first end of on-off switch, the second input terminal of transition switch unit also serves as transition switching
Unit output end, the output end of transition switch unit connect the second end of transition resistance and the second end of on-off switch.
3. special according to a kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion described in claim 1
Sign is: the transition switch unit on-off switch uses vacuum interrupter.
4. special according to a kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion described in claim 1
Sign is: one end of the voltage rating branch is connect with main winding output end；The output end of the other end and transition switch unit
Connection.
5. special according to a kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion described in claim 1
Sign is that vacuum interrupter can be used in the concatenated on-off switch of the pressure regulation branch and voltage rating branch road.
6. special according to a kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion described in claim 1
Sign is: one first vacuum interrupter of connecting on from the second input terminal to the route of output end in the transition switch unit, from
One second vacuum interrupter of series connection, pressure regulation branch and voltage rating on route of the first input end through transition resistance to output end
The concatenated on-off switch in branch road is all made of common on-off switch.
7. thering is load to adjust according to a kind of staggered-parallel-type multi gear transformer with dipole inversion described in claim 2 or claim 3
Volt circuit, it is characterised in that: the tap-changing windings are sequentially connected and are formed by two sections of voltage regulation coils head and the tail of coiling in the same direction, pressure regulation around
Group includes upper end tap, middle-end tap, lower end tap totally three taps, and the input terminal of main winding input termination regulating circuit is main
The public contact of winding output end connection polarity reversing switch；Two independent contacts of polarity reversing switch be separately connected pressure regulation around
The upper end tap and lower end tap of group；Three pressure regulation branches and voltage rating branch road are respectively connected a vacuum interrupter；
The pressure regulation branch connecting with upper end tap, the pressure regulation branch other end are connected with transition switch unit first input end；
The pressure regulation branch connecting with middle-end tap, the pressure regulation branch other end are connected with the second input terminal of transition switch unit；With
The pressure regulation branch of lower end tap connection, the pressure regulation branch other end are connected with the first input end of transition switch unit；
One end of the voltage rating branch is connect with main winding output end；The output end of the other end and transition switch unit connects
It connects.
8. thering is load to adjust according to a kind of staggered-parallel-type multi gear transformer with dipole inversion described in claim 2 or claim 3
Volt circuit, it is characterised in that: the tap-changing windings are sequentially connected and are formed by two sections of voltage regulation coils head and the tail of coiling in the same direction, pressure regulation around
Group includes upper end tap, middle-end tap, lower end tap totally three taps, and the input terminal of main winding input termination regulating circuit is main
The public contact of winding output end connection polarity reversing switch；Two independent contacts of polarity reversing switch be separately connected pressure regulation around
The upper end tap and lower end tap of group；Three pressure regulation branches and voltage rating branch road are respectively connected a vacuum interrupter；
The pressure regulation branch connecting with upper end tap, the pressure regulation branch other end are connected with the second input terminal of transition switch unit；
The pressure regulation branch connecting with middle-end tap, the pressure regulation branch other end are connected with the first input end of transition switch unit；With
The pressure regulation branch of lower end tap connection, the pressure regulation branch other end are connected with the second input terminal of transition switch unit；
One end of the voltage rating branch is connect with main winding output end；The output end of the other end and transition switch unit connects
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910634395.3A CN110190788A (en) | 2019-07-15 | 2019-07-15 | A kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910634395.3A CN110190788A (en) | 2019-07-15 | 2019-07-15 | A kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion |
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| CN110190788A true CN110190788A (en) | 2019-08-30 |
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ID=67725809
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910634395.3A Pending CN110190788A (en) | 2019-07-15 | 2019-07-15 | A kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114430247A (en) * | 2020-10-29 | 2022-05-03 | 浙江宝威电气有限公司 | Voltage regulating circuit of nine-gear transformer |
| CN114430246A (en) * | 2020-10-29 | 2022-05-03 | 浙江宝威电气有限公司 | Voltage regulating circuit of five-gear transformer |
-
2019
- 2019-07-15 CN CN201910634395.3A patent/CN110190788A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114430247A (en) * | 2020-10-29 | 2022-05-03 | 浙江宝威电气有限公司 | Voltage regulating circuit of nine-gear transformer |
| CN114430246A (en) * | 2020-10-29 | 2022-05-03 | 浙江宝威电气有限公司 | Voltage regulating circuit of five-gear transformer |
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