CN105702494B - A kind of transformer is without arc load ratio bridging switch - Google Patents
A kind of transformer is without arc load ratio bridging switch Download PDFInfo
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- CN105702494B CN105702494B CN201610108983.XA CN201610108983A CN105702494B CN 105702494 B CN105702494 B CN 105702494B CN 201610108983 A CN201610108983 A CN 201610108983A CN 105702494 B CN105702494 B CN 105702494B
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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
- H01H9/0016—Contact arrangements for tap changers
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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
- H01H2009/0061—Monitoring tap change switching devices
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Abstract
The invention discloses a kind of transformer without arc load ratio bridging switch.The transformer includes without arc load ratio bridging switch：Control loop, moving contact and static contact；In steady operation, main contact, the First Transition contact of moving contact are connected with current static contact, by main contact conducting electric current；When performing switching action, after triggering the first two-way switch in advance, main contact disconnects；Whether the terminal voltage that each two-way switch is judged by control loop is conduction voltage drop or level winding voltage, and according to each transition branch road of judged result break-make；After main contact and the second transition contact are overlapped on next static contact, stop the second two-way switch transition branch road of triggering, main contact conducting electric current.The present invention, according to the break-make of the terminal voltage state change situation control circuit of each two-way switch, while switching is realized without arcing, reduces switching loss and switch cost using circuit as transition branch road.
Description
Technical field
The present invention relates to transformer regulating technical field, and in particular to a kind of transformer is without arc load ratio bridging switch.
Background technology
In power system, voltage is an important indicator for weighing the quality of power supply.ULTC is by there is load
Shunting switch (OLTC) realizes the uninterrupted pressure regulation to high pressure transmission and distribution networkses, and steady load center is played in power system
Voltage, regulation reactive power flow, the critical function for increasing dispatching of power netwoks flexibility, have obtained relatively broad application in power network.
In addition, OLTC coordinates the Reactive-power control that voltage regulating mode can be achieved with auto-transformer and capacitor bank, with multi-tap inductance
Coil combination may make up adjustable arc-extinction winding.The reliability of OLTC work directly affects the stability of work of electric power system.
Typical transformer OLTC can be divided into the mechanical and major class of vacuum type two.Mechanical OLTC have integral type (combined type) and
Split type (combined type) two kinds of structures.Mechanical OLTC is come disjunction circuital current with mechanical contact.According to the literature, as long as
Voltage is more than 10~20V in circuit, and electric current can produce electric arc therebetween in disjunction more than 80~100mA, dynamic and static contact, this
When circuit in electric current continue to circulate, until arc extinction, after contact gap recovers dielectric intensity, circuit is just broken,
The electric arc occurred in switchgear is referred to as switching arc.Electric arc meeting ablation contact, reduces service life.In oil immersion insulation
In OLTC can because electric arc in oil blow-out and deteriorate transformer insulation oil, while transition resistance is heated can also accelerate transformer
The decomposition of oil, can produce accident when serious；In order to suppress arc energy, vacuum type OLTC can be selected, vacuum bubbles can effectively drop
The influence of low electric arc.It but voltage is born at both ends always during off-state, need to be designed by system voltage, reduce vacuum switch and use the longevity
Life.And the vacuum switch disconnected conjunction time is slow, mechanical mechanism operation is complex, is difficult to control.
It follows that due to can not continuously be transferred the files in mechanical and vacuum type OLTC in the handover level winding, can cause
Cross resistance to generate heat rapidly, increase transition loss and increase rate of breakdown.
The content of the invention
For in the prior art the defects of, the invention provides a kind of transformer without arc load ratio bridging switch, has in reality
While now switching no arcing, switching loss is reduced, switch cost is reduced, improves the advantages of switching reliability.
The present invention proposes a kind of transformer without arc load ratio bridging switch, including：Control loop, moving contact and and transformer
The static contact of tap connection；
The moving contact includes：Main contact, First Transition contact and the second transition contact；
The main contact is connected with transformer terminal, and the First Transition contact passes through the first two-way switch transition branch
Road is connected with transformer terminal, and second transition contact passes through the second two-way switch transition branch road and inducer for line outlet end of transformer
Son connection；
In steady operation, the main contact, the First Transition contact are connected with current static contact, and by the master
Contact conducting electric current；
When performing switching action, the first two-way switch of the first two-way switch transition branch road, main contact are triggered in advance
After disconnection, electric current is transferred to the first two-way switch transition branch road；
If the terminal voltage of the second two-way switch of the second two-way switch transition branch road is level winding voltage, stop triggering institute
State the first two-way switch；If the terminal voltage of first two-way switch is level winding voltage, second two-way switch is triggered；
After the main contact and second transition contact are overlapped on next static contact, stop triggering second two-way switch,
By the main contact conducting electric current；
The control loop, for detecting the terminal voltage of first two-way switch and second two-way switch, according to
The terminal voltage produces trigger signal, and the trigger signal is sent to first two-way switch or second two-way opened
Close.
Optionally, static contact is circle bulge-structure, and the main contact is round recessed structure；
The First Transition contact and second transition contact are strip slide vane structure；
Static contact can touch with the First Transition contact, the main contact and second transition successively according to preset order
Head is slidably connected.
Optionally, the first two-way switch transition branch road and the second two-way switch transition branch road are two-way by one
Switch and a fastp-acting fuse are composed in series, outside one buffer circuit of parallel connection and a current-limiting circuit.
Optionally, on the main line of the first two-way switch transition branch road and the second two-way switch transition branch road also
It is provided with a current divider；
Correspondingly, the control loop is additionally operable to：
Detect the electric current of the current divider, and according to the electric current to first two-way switch and second two-way opened
Close and send trigger signal.
Optionally, the control loop includes：Main control module, detection module and trigger module；
The detection module, for detecting terminal voltage or the institute of first two-way switch and second two-way switch
State the electric current of current divider, and first two-way switch and described second two-way is obtained according to the terminal voltage or the electric current
The working condition of switch and operating position, and the working condition and operating position are sent to the main control module；
The main control module, for producing control signal according to the working condition and operating position that receive, and will
The control signal is sent to the trigger module；
The trigger module, for producing trigger signal according to the control signal received, and the triggering is believed
Number send to corresponding two-way switch.
Optionally, the main control module is additionally operable to after switching action terminates, trigger again first two-way switch and
Second two-way switch.
Optionally, the control loop also includes：Communication module；
The communication module, the data for the detection module to be detected are uploaded to host computer, by the host computer root
The moving contact running is driven according to the data control drive device received.
Optionally, the control loop also includes：Power module；
The power module is powered using the level winding voltage as input voltage for the control loop.
Optionally, the bridging time of the First Transition contact and second transition contact is more than 10ms.
Optionally, in addition to：Limit offside shelves；
The offside shelves of limitation, for preventing the moving contact from sliding into first static contact or last static contact.
As shown from the above technical solution, transformer proposed by the present invention is without arc load ratio bridging switch, by the way that circuit is used as
Transition branch road, with the break-make according to two-way switch anode-cathode voltage state or the current control circuit of current divider, switch nothing realizing
While arcing, switching loss is reduced, reduces switch cost.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood by reference to accompanying drawing, accompanying drawing is schematically without that should manage
Solve to carry out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 shows structural representation of the transformer without arc load ratio bridging switch that one embodiment of the invention provides；
Fig. 2 shows structural representation of the transformer without arc load ratio bridging switch that another embodiment of the present invention provides；
Fig. 3 shows that structure of the transformer without control loop in arc load ratio bridging switch that one embodiment of the invention provides is shown
It is intended to；
Fig. 4 shows that the flow for handoff procedure of the transformer without arc load ratio bridging switch that one embodiment of the invention provides is shown
It is intended to；
Fig. 5 shows that the flow for control strategy of the transformer without arc load ratio bridging switch that one embodiment of the invention provides is shown
It is intended to；
Fig. 6 shows work of the transformer of one embodiment of the invention offer without arc load ratio bridging switch in reduction regulation
State diagram；
Fig. 7 shows work of the transformer of one embodiment of the invention offer without arc load ratio bridging switch when boosting regulation
State diagram.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
Structural representation of the transformer without arc load ratio bridging switch that Fig. 1 provides for one embodiment of the invention, reference picture 1,
The transformer without arc load ratio bridging switch, including：Control loop, moving contact and the static contact being connected with transformer tapping；
The moving contact includes：Main contact, First Transition contact and the second transition contact；
The main contact is connected with transformer terminal, and the First Transition contact passes through the first two-way switch transition branch
Road is connected with transformer terminal, and second transition contact passes through the second two-way switch transition branch road and inducer for line outlet end of transformer
Son connection；
It will be appreciated that 1~8 in Fig. 1 is static contact, it is connected with transformer tapping；N, X, Y and Z are tie point,
D points are main contact, and B points are First Transition contact, and A points are the second transition contact；In the presence of the driving of outside mechanical/electromechanical,
Moving contact moves, and to be connected from different target static contacts, and then changes the coil turn accessed between N and X, reaches tune
Press purpose；
In steady operation, the main contact, the First Transition contact are connected with current static contact, and by the master
Contact conducting electric current；
When performing switching action, the first two-way switch of the first two-way switch transition branch road, main contact are triggered in advance
After disconnection, electric current is transferred to the first two-way switch transition branch road；
If the terminal voltage of the second two-way switch of the second two-way switch transition branch road is level winding voltage, stop triggering institute
State the first two-way switch；
If the terminal voltage of first two-way switch is level winding voltage, second two-way switch is triggered；Described
After main contact and second transition contact are overlapped on next static contact, stop triggering second two-way switch, by described
Main contact conducting electric current；
It should be noted that in steady operation, main contact is reliably connected with static contact 6, the static contact also with the first mistake
Contact B is crossed to be reliably connected；Second transition contact A is in floating state；
Switching switch receives host computer decompression switching command, and mechanical mechanism rotates, and drives load ratio bridging switch shaft core suitable
Hour hands are rotated, and static contact 7 is switched to by the static contact 6.
The control loop, for detecting the terminal voltage of first two-way switch and second two-way switch, according to
The terminal voltage produces trigger signal, and the trigger signal is sent to first two-way switch or second two-way opened
Close.
It should be noted that control loop after the terminal voltage of two two-way switch is detected, will be sentenced to terminal voltage
It is disconnected, to obtain whether the terminal voltage of two two-way switch is conduction voltage drop or level winding voltage, and based on judged result triggering or
Person stops two two-way switch of triggering；It is appreciated that the criterion that the present invention uses is electric for the terminal voltage and level winding of two-way switch
Pressure, it is relative detect the magnitude of current for, it is easy to detect a lot.
The present invention is using circuit as transition branch road, instead of transition resistance of the prior art, in handoff procedure, to pass through
Two-way switch terminal voltage state change situation control circuit turns on and off on request, while switching is realized without arcing, subtracts
Few switching loss and switch cost.
Structural representation of the transformer without arc load ratio bridging switch that Fig. 2 provides for another embodiment of the present invention, reference picture
2, static contact is circle bulge-structure, and the main contact is round recessed structure；
The First Transition contact and second transition contact are strip slide vane structure；
Static contact can touch with the First Transition contact, the main contact and second transition successively according to preset order
Head is slidably connected.
It should be noted that switching switch integrates tap selection and tap changing function, the switching switch includes 3
Individual moving contact and several static contacts；The moving contact is a main contact and two transition contacts for leading directly to machinery；The master
Contact is round recessed structure, narrow contact surface；Described two transition contacts are strip slide vane structure, wide contact surface；The moving contact
In, main contact is located in the middle part of horizontal plane, and two other transition contact adheres to lower horizontal plane separately two layers；It is main to touch in the moving contact
Vertical plane where head belongs to a vertical plane together, leaned on close to load ratio bridging switch center axis, two other two-way switch transition contact
On the outside of the paraxial heart；In the moving contact, two transition contacts have projected overlapping region on the vertical plane；The static contact is boss
Play structure, narrow contact surface.
It will be appreciated that during the static contact by currently turning on switches to next static contact, moving contact motion, with
Make relative motion occurs between moving contact and static contact；
During with clockwise movement, static contact will successively with the main contact, the First Transition contact and second mistake
Contact is crossed to be slidably connected；
During with counterclockwise movement, static contact will successively with the main contact, second transition contact and first mistake
Contact is crossed to be slidably connected；
Further, by taking default sequence of motion as an example, including following motion state：
Motion state one, the first static contact are slided with the surface of First Transition contact in the round recessed of main contact and moved simultaneously
Dynamic, after the first static contact and main contact disconnect, the first static contact individually slides on the surface of First Transition contact；
Motion state two, the strip slide plate of the second transition contact are overlapped to the second static contact, and now, the first static contact exists
The surface of First Transition contact is slided, and the second static contact slides on the strip slide plate of First Transition contact；
Motion state three, main contact are connected with the second static contact, and the first static contact disconnects with First Transition joint, until two
The strip slide plate and main contact of individual transition contact are connected with the second static contact；
Motion state four, the second transition contact and the second static contact disconnect, and the second static contact is simultaneously recessed in the circle of main contact
Slide movement in surface in groove with First Transition contact；
It should be noted that the shape of First Transition contact and the second transition contact can depend on the circumstances, in the present invention, by
In coiling group to be circular, therefore two transition contacts are designed as circular arc, but should not be construed as only being limited to circular arc；It is in addition, dynamic
It is also controllable to touch cephalomotor order；
Further, the shape of coiling group is alternatively other shapes, no longer limits herein；Correspondingly, static contact touches with dynamic
To there is the direction of relative motion between head adaptively changes；For example, when coiling group is linear, static contact will be done with moving contact
Relatively linear reciprocating motion.
In the present embodiment, the first two-way switch transition branch road and the second two-way switch transition branch road are by one
Two-way switch and a fastp-acting fuse are composed in series, outside one buffer circuit of parallel connection and a current-limiting circuit.
It should be noted that two-way switch can use half control device IGCT or full-controlled device IGBT, MOSFET, buffering electricity
Road is resistance-capacitance circuit, and current-limiting circuit is ZnO circuits；
Further, when two-way switch uses half control device IGCT, two IGCT combination types of attachment are inverse parallel
Connection；When the two-way switch uses full-controlled device IGBT, MOSFET, the combination type of attachment of two full-controlled devices is anti-series
Connection.
In a feasible embodiment, two-way switch conduction voltage drop is about positive and negative 1V, in order to avoid by normal zero crossings
Magnitude of voltage is mutually obscured with two-way switch conduction voltage drop, using the method for delay sampling, the situation for avoiding zero crossings voltage from judging by accident；
It should be noted that the present invention is formed using hardware difference sample circuit and comparator circuit, the sampling of hardware difference
Circuit is used to gather two-way switch terminal voltage and level winding voltage in real time, and sends to comparator circuit；Comparator circuit is used for
Obtained magnitude of voltage will be sampled compared with threshold value, using 2V as comparator threshold, using the method for avoiding comparator threshold, just
Transit time of the string ac voltage signal between -2V~+2V is 18 μ s, as long as criterion delay is more than 18 μ s, you can accurately sentence
Whether disconnected two-way switch pipe is on state, to escape normal voltage zero crossing situation.
In a feasible embodiment, the present invention is in the first two-way switch transition branch road and second two-way switch
A current divider is also provided with the main line of transition branch road；
Correspondingly, the control loop is additionally operable to detect the electric current of the current divider, and according to the electric current of the current divider
Trigger signal is sent to the first two-way switch transition branch road and the second two-way switch transition branch road.
It should be noted that either with magnitude of voltage still using current value can as the judgement that uses of the present invention according to
According to herein the parameter that others are used to judge is also feasible, is no longer defined.
Fig. 3 is structural representation of the transformer without control loop in arc load ratio bridging switch that one embodiment of the invention provides
Figure, reference picture 3, the control loop include：Main control module 310, detection module 320 and trigger module 330；
The detection module 320, for detect first two-way switch and second two-way switch terminal voltage or
The electric current of current divider described in person, and first two-way switch and described second are obtained according to the terminal voltage or the electric current
The working condition of two-way switch and operating position, and the working condition and operating position are sent to the main control module 310；
The main control module 310, for producing control signal according to the working condition and operating position that receive, and
The control signal is sent to the trigger module 330；
The trigger module 330, for producing trigger signal according to the control signal that receives, and by the triggering
Signal is sent to corresponding two-way switch.
In order to improve the accuracy of detection of two-way switch terminal voltage, the main control module 310 is additionally operable to terminate in switching action
Preceding random time point after either switching action terminates, trigger two-way switch again.
It should be noted that buffer circuit has residual voltage in handoff procedure, two-way switch terminal voltage is caused to miss survey problem,
Cause program to be judged by accident, normal switching can not be realized.By in a program, when switching clockwise (reduction regulation), main contact be present
The operating mode of next static contact is overlapped on the First Transition contact, the second transition contact, the residual voltage of buffer circuit can lead to
Cross main contact release；Counterclockwise (boosting regulation) during switching, touched in the absence of main contact and the First Transition contact, the second transition
Head is overlapped on the operating mode of next static contact, two-way switch triggering link need to be separately provided, in the preceding single order of each finishing switching
Section, two-way switch is individually triggered again, the electric energy of release buffering electric capacity, prevents from judging by accident caused by next pressure regulation.
In the present embodiment, control loop also includes：Communication module 340；
The communication module 340, the data for the detection module 320 to be detected are uploaded to host computer, on described
Position machine drives the moving contact to operate according to the data control drive device received.
It should be noted that host computer judges the data sent according to communication module 340, generation instruction, and lead to
Communication module 340 is crossed to send to corresponding module.
In the present embodiment, control loop also includes：Power module 350；
The power module 350 is powered using the level winding voltage as input voltage for the control loop.
It should be noted that power module 350 obtains level winding voltage by power taking contact E, after carrying out shaping, to each mould
Module unit provides direct current energy；
Wherein, the power taking contact E can have different connections, can be with reference to depending on actual condition.
In the present embodiment, the bridging time of the First Transition contact and second transition contact is more than 10ms.
Completed it should be noted that the moving contact handoff procedure is the driving of outside mechanical mechanism, not by of the invention electric
Part is controlled, and is realized and is switched in zero crossing in order to ensure three-phase, it is desirable to which two transition contact bridging times of A, B cannot be less than
10ms, the switching of three-phase zero passage leave enough time nargin.
In the present embodiment, transformer is additionally provided with the offside shelves of limitation without arc load ratio bridging switch；
The offside shelves of limitation, for preventing the moving contact from sliding into first static contact and last static contact.
It should be noted that power taking contact E in design, it is necessary to consider can power taking problem, the moving contact slides into 1
Or during 9 gear, there is a situation where power taking contact can not power taking, offside shelves are limited so should consider to set in design, with prevention and control
Loop processed can not obtain electric, and moving contact can not complete no arc transition switching；
For example, power taking contact E is located at transition contact B right side in winding shown in Fig. 1, when the direction of rotation of moving contact is
When counterclockwise, power taking contact rotates and connects static contact 5,4,3,2 with this, but when moving contact rotates and is connected with static contact 1,
Power taking contact will be in vacant state, now will appear from can not power taking situation, thus the present invention replacement of static contact 1 is limited
Position shelves 1；
Similarly, if power taking contact E is located at transition contact A left side in winding, when the direction of rotation of moving contact is clockwise
When, power taking contact is rotated and connects static contact 5,6,7,8 with this, but when moving contact rotates and is connected with static contact 9, power taking is touched
Head will be in vacant state, now will appear from can not power taking situation, it is thus of the invention that static contact 9 is replaced with into spacing shelves 9.
Fig. 4 is the flow signal for handoff procedure of the transformer without arc load ratio bridging switch that one embodiment of the invention provides
Figure, reference picture 4, exemplified by switching to static contact 7 from static contact 6, specific regulating step is as follows：
(1) main contacts D and transition contact B are connected on static contact 6, main contact conducting electric current, and two-way switch a, b are not
It is triggered.
(2) triggers two-way switch b in advance, is then turned off main contact D, by transition contact B afterflows.
(3) (3.1) transition contact A snaps into next static contact 7, and two-way switch a is not triggered, and electric current is still from transition contact B
Flow through.
(3.2) triggering to two-way switch b is stopped, two-way switch b is turned off naturally after current zero-crossing point, is now triggered immediately
Two-way switch a, electric current flow through from transition contact A.Due to being the switching electric current in current zero-crossing point, so electric arc will not be produced,
Load-side there will not be very great fluctuation process.
(4) two-way switch b has been switched off, and transition contact B disconnects in the case of zero current, without electric arc；Now continue to touch
Two-way switch a is sent out, by transition contact A afterflows.
(5) transition contacts B also snaps into static contact 7, is simplify control, does not trigger two-way switch b, still by transition contact A
Conducting electric current.
(6) main contacts D and transition contact A, B snap into next static contact 7, main contact D conducting electric currents simultaneously.
(7) transition contacts A disconnects in the case of no-voltage, and main contact D is transition contact B short circuits, main contact D electric conductions
Stream.
It is described similar with moving contact reduction regulation clockwise, the boosting regulation of moving contact rotate counterclockwise, switched by static contact 6
It is opposite with reduction regulation process to static contact 5, handoff procedure.
Fig. 5 is the flow signal for control strategy of the transformer without arc load ratio bridging switch that one embodiment of the invention provides
Figure, reference picture 5, wherein, a pipes as IGCT a, that is, two-way switch a；
Below so that static contact 6 is the static contact currently turned on as an example, control strategy is described in detail：
After the step-down instruction of host computer transmission is received, drive device rotates, and drives load ratio bridging switch shaft core up time
Pin rotates, and is rotated from static contact 6 to the direction of static contact 7, before main contact and static contact 6 disconnect, first triggers two-way switch b,
Whether the pressure drop for judging two-way switch b terminal voltages is about ± 1, if it is not, then detecting the pressure drop of two-way switch b terminal voltages again；
If so, then trigger two-way switch b conductings；Whether the voltage difference for judging two-way switch a ends is that can bear step voltage, if
It is no, then the voltage difference at two-way switch a ends is detected again；
If so, stopping triggering two-way switch b, then whether the voltage difference for judging two-way switch b ends is that can bear step voltage, if
It is no, then the voltage difference at two-way switch b ends is detected again；
If so, then triggering two-way switch a conductings, control terminates；
After the boost instruction of host computer transmission is received, drive device rotates, and drives the load ratio bridging switch shaft core inverse time
Pin rotates, and is rotated from static contact 6 to the direction of static contact 5, before main contact and static contact 6 disconnect, first triggers two-way switch a,
Whether the pressure drop for judging two-way switch a terminal voltages is about ± 1, if it is not, then detecting the pressure drop of two-way switch a terminal voltages again；
If so, then trigger two-way switch a conductings；Whether the voltage difference for judging two-way switch b ends is that can bear step voltage, if
It is no, then the voltage difference at two-way switch b ends is detected again；
If so, stopping triggering two-way switch a, then whether the voltage difference for judging two-way switch a ends is that can bear step voltage, if
It is no, then the voltage difference at two-way switch a ends is detected again；
If so, then triggering two-way switch b conductings, control terminates.
Fig. 6 is working condition of the transformer of one embodiment of the invention offer without arc load ratio bridging switch in reduction regulation
Figure, reference picture 6, wherein, (1)-(7) are corresponding with step (1)-(7) in above-mentioned Fig. 4, and the D in figure is main contact, A second
Transition contact, B are First Transition contact, and a, b are two two-way switch, and 6 be that stationary contact 6,7 is stationary contact 7；
The detailed content of depressurization step refer to above-mentioned Fig. 4 corresponding to content, no longer repeated herein.
Fig. 7 is working condition of the transformer of one embodiment of the invention offer without arc load ratio bridging switch when boosting regulation
Figure, reference picture 7；
Similar with moving contact reduction regulation clockwise, when boosting regulation, moving contact rotate counterclockwise is moved, by static contact 7
Static contact 6 is switched to, handoff procedure is with reduction regulation process on the contrary, no longer repeated herein.
In summary, by the present invention in that with two-way switch and the triggering SECO to two-way switch, realized
The commutating without arcing of on-load shunting switch, it is therefore prevented that cause fault spread when two-way switch breaks down, do not damage device, and structure
Simply, reliable operation.
Although being described in conjunction with the accompanying embodiments of the present invention, those skilled in the art can not depart from this hair
Various modifications and variations are made in the case of bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (10)
1. a kind of transformer is without arc load ratio bridging switch, it is characterised in that including：Control loop, moving contact and taken out with transformer
The static contact of head connection；
The moving contact includes：Main contact, First Transition contact and the second transition contact；
The main contact is connected with transformer terminal, the First Transition contact by the first two-way switch transition branch road with
Transformer terminal is connected, and second transition contact is connected by the second two-way switch transition branch road and transformer terminal
Connect；
In steady operation, the main contact, the First Transition contact are connected with current static contact, and by the main contact
Conducting electric current；
When performing switching action, the first two-way switch of the first two-way switch transition branch road is triggered in advance, and main contact disconnects
Afterwards, electric current is transferred to the first two-way switch transition branch road；
If the terminal voltage of the second two-way switch of the second two-way switch transition branch road is level winding voltage, stop triggering described the
One two-way switch；If the terminal voltage of first two-way switch is level winding voltage, second two-way switch is triggered；Institute
State main contact and after second transition contact is overlapped on next static contact, stop triggering second two-way switch, by institute
State main contact conducting electric current；
The control loop, for detecting the terminal voltage of first two-way switch and second two-way switch, according to described
Terminal voltage produces trigger signal, and the trigger signal is sent to first two-way switch or second two-way switch.
2. transformer according to claim 1 is without arc load ratio bridging switch, it is characterised in that static contact is that boss plays knot
Structure, the main contact are round recessed structure；
The First Transition contact and second transition contact are strip slide vane structure；
Static contact can be slided with the First Transition contact, the main contact and second transition contact successively according to preset order
Dynamic connection.
3. transformer according to claim 1 is without arc load ratio bridging switch, it is characterised in that the first two-way switch mistake
Cross branch road and the second two-way switch transition branch road is composed in series by a two-way switch and a fastp-acting fuse, outside
A buffer circuit in parallel and a current-limiting circuit.
4. transformer according to claim 1 is without arc load ratio bridging switch, it is characterised in that in first two-way switch
A current divider is also provided with the main line of transition branch road and the second two-way switch transition branch road；
Correspondingly, the control loop is additionally operable to：
The electric current of the current divider is detected, and is sent out according to the electric current to first two-way switch and second two-way switch
Send trigger signal.
5. transformer according to claim 4 is without arc load ratio bridging switch, it is characterised in that the control loop includes：
Main control module, detection module and trigger module；
The detection module, for detect first two-way switch and second two-way switch terminal voltage or described point
The electric current of device is flowed, and first two-way switch and second two-way switch are obtained according to the terminal voltage or the electric current
Working condition and operating position, and the working condition and operating position are sent to the main control module；
The main control module, for producing control signal according to the working condition and operating position that receive, and by described in
Control signal is sent to the trigger module；
The trigger module, for producing trigger signal according to the control signal received, and the trigger signal is sent out
Deliver to corresponding two-way switch.
6. transformer according to claim 5 is without arc load ratio bridging switch, it is characterised in that the main control module is additionally operable to
After switching action terminates, first two-way switch and second two-way switch are triggered again.
7. transformer according to claim 5 is without arc load ratio bridging switch, it is characterised in that the control loop is also wrapped
Include：Communication module；
The communication module, the data for the detection module to be detected are uploaded to host computer, by the host computer according to connecing
The data control drive device received drives the moving contact motion.
8. transformer according to claim 5 is without arc load ratio bridging switch, it is characterised in that the control loop is also wrapped
Include：Power module；
The power module is powered using the level winding voltage as input voltage for the control loop.
9. transformer according to claim 1 is without arc load ratio bridging switch, it is characterised in that the First Transition contact and
The bridging time of second transition contact is more than 10ms.
10. transformer according to claim 1 is without arc load ratio bridging switch, it is characterised in that also includes：Limit offside
Shelves；
The offside shelves of limitation, for preventing the moving contact from sliding into first static contact or last static contact.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610108983.XA CN105702494B (en) | 2016-02-26 | 2016-02-26 | A kind of transformer is without arc load ratio bridging switch |
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| CN201610108983.XA CN105702494B (en) | 2016-02-26 | 2016-02-26 | A kind of transformer is without arc load ratio bridging switch |
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| CN105702494A CN105702494A (en) | 2016-06-22 |
| CN105702494B true CN105702494B (en) | 2018-02-06 |
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| CN107068368B (en) * | 2017-05-11 | 2019-01-29 | 山东电工电气集团智能电气有限公司 | A kind of dry-type on-load tap changer circuit and its capacity transfer and pressure regulation method |
| CN113363992B (en) * | 2021-06-18 | 2021-12-14 | 哈尔滨硕诺科技有限公司 | Non-impact pressure regulating control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07335455A (en) * | 1994-06-09 | 1995-12-22 | Fuji Electric Co Ltd | Static on-load tap changer and change of tap thereof |
| CN201259827Y (en) * | 2008-08-21 | 2009-06-17 | 上海华明电力设备制造有限公司 | Thyristor reactor transition loaded adapter switch without quick mechanism |
| CN202711975U (en) * | 2012-04-23 | 2013-01-30 | 莱茵豪森机械制造公司 | Contact means for load selector of staged transformer |
| CN105206402A (en) * | 2015-11-10 | 2015-12-30 | 刁俊起 | Novel on-load voltage regulation switch of transformer |
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Effective date of registration: 20210707 Address after: 063500 Hebei Tangshan City Luannan County West Industrial Zone, west of Fairview Road, south of Meng Xin Street. Patentee after: TANGSHAN YUANHONG ELECTRIC EQUIPMENT Co.,Ltd. Address before: 066004 No. 360 west section of Hebei Avenue, seaport District, Hebei, Qinhuangdao Patentee before: HEBEI NORMAL University OF SCIENCE AND TECHNOLOGY |
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