CN105702494A - Transformer arcless on-load tap switch - Google Patents
Transformer arcless on-load tap switch Download PDFInfo
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- CN105702494A CN105702494A CN201610108983.XA CN201610108983A CN105702494A CN 105702494 A CN105702494 A CN 105702494A CN 201610108983 A CN201610108983 A CN 201610108983A CN 105702494 A CN105702494 A CN 105702494A
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- contact
- way switch
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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
Abstract
The present invention discloses a transformer arcless on-load tap switch. The transformer arcless on-load tap switch comprises a control loop, a moving contact and a static contact. The main contact and the first transition contact of the moving contact are connected with a current static contact in a steady state operation, and the main contact is configured to conduct current; when a switching motion is executed, the main contact is disconnected after a first two-way switch is triggered in advance; the control loop is configured to determine whether the terminal voltage of each two-way switch is drop voltage or grade winding voltage or not and switch each transition branch according to the determination result; and the transition branch of a second two-way switch is stopped to trigger after the main contact and a second transition contact are overlapped to the next static contact, and the main contact is configured to conduct current. According to the invention, a circuit is taken as a transition branch, and the switching of the circuit is controlled according to the change condition of the terminal voltage of each two-way switch, so that the switching loss and switching cost are reduced while the switching arcless is realized.
Description
Technical field
The present invention relates to transformer regulating technical field, be specifically related to a kind of transformator without arc load ratio bridging switch。
Background technology
In power system, voltage is the important indicator weighing the quality of power supply。ULTC realizes the uninterrupted pressure regulation to high pressure transmission and distribution networks by load ratio bridging switch (OLTC), power system plays steady load center voltage, regulate reactive power flow, increase the critical function of dispatching of power netwoks motility, electrical network obtains relatively broad application。In addition, OLTC coordinates, with autotransformer and Capacitor banks, the Reactive-power control that can realize voltage regulating mode, may make up adjustable arc-extinction winding with the combination of multi-tap inductance coil。The reliability of OLTC work directly affects the stability of work of electric power system。
Typical transformer OLTC can be divided into mechanical type and the big class of vacuum type two。Mechanical type OLTC has integral type (combined type) and split type (combination type) two kinds of structures。Mechanical type OLTC mechanical contact carrys out disjunction circuital current。According to the literature, as long as voltage is more than 10～20V in circuit, electric current is more than 80～100mA, dynamic and static contact can produce electric arc betwixt when disjunction, now the electric current in circuit continues circulation, until arc extinction, after contact gap recovers dielectric intensity, circuit is just broken, occurs the electric arc in switchgear to be called switching arc。Electric arc meeting ablation contact, reduces service life。In the OLTC of oil immersion insulation can because electric arc in oil blow-out and make transformer insulation oil deteriorate, while transition resistance be heated and also can accelerate the decomposition of transformer oil, accident can be produced time serious；In order to suppress arc energy, can be selected for vacuum type OLTC, vacuum bubbles can effectively reduce the impact of electric arc。But voltage is born at two ends during off-state always, need to design by system voltage, reduce vacuum switch service life。And the vacuum switch disconnected conjunction time is slow, mechanical mechanism operation is complex, wayward。
It follows that owing to mechanical type and vacuum type OLTC in the handover level winding can not transfer the files continuously, can cause that transition resistance generates heat rapidly, increase transition loss and increase rate of breakdown。
Summary of the invention
For defect of the prior art, the invention provides a kind of transformator without arc load ratio bridging switch, have while realizing switching without arcing, reduce switching loss, reduce switch cost, improve the advantage switching reliability。
The present invention proposes a kind of transformator without arc load ratio bridging switch, including: control loop, moving contact and the static contact being connected with transformer tapping；
Described moving contact includes: main contact, First Transition contact and the second transition contact；
Described main contact is connected with transformer terminal, and described First Transition contact is connected with transformer terminal by the first two-way switch transition branch road, and described second transition contact is connected with transformer terminal by the second two-way switch transition branch road；
When steady operation, described main contact, described First Transition contact are all connected with current static contact, and by described main contact On current；
When performing switching action, triggering the first two-way switch of described first two-way switch transition branch road in advance, after main contact disconnects, electric current is transferred to described 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, then stop triggering described first two-way switch；If the terminal voltage of described first two-way switch is level winding voltage, then trigger described second two-way switch；After described main contact and described second transition contact are all overlapped on next static contact, stop triggering described second two-way switch, by described main contact On current；
Described control loop, for detecting described first two-way switch and the terminal voltage of described second two-way switch, produces to trigger signal according to described terminal voltage, and sends described triggering signal to described first two-way switch or described second two-way switch。
Optionally, static contact is circle bulge-structure, and described main contact is round recessed structure；
Described First Transition contact and described second transition contact are strip slide vane structure；
Static contact can be slidably connected with described First Transition contact, described main contact and described second transition contact successively according to preset order。
Optionally, described first two-way switch transition branch road and described second two-way switch transition branch road are composed in series by a two-way switch and a fastp-acting fuse, an outside buffer circuit in parallel and a current-limiting circuit。
Optionally, the main line of described first two-way switch transition branch road and described second two-way switch transition branch road is also provided with a diverter；
Correspondingly, described control loop is additionally operable to:
Detect the electric current of described diverter, and send according to described electric current trigger signal to described first two-way switch and described second two-way switch。
Optionally, described control loop includes: main control module, detection module and trigger module；
Described detection module, the electric current of terminal voltage or described diverter for detecting described first two-way switch and described second two-way switch, and obtain duty and the operating position of described first two-way switch and described second two-way switch according to described terminal voltage or described electric current, and described duty and operating position are sent to described main control module；
Described main control module, for producing control signal according to the described duty received and operating position, and sends described control signal to described trigger module；
Described trigger module, for producing to trigger signal according to the described control signal received, and sends described triggering signal to corresponding two-way switch。
Optionally, described main control module is additionally operable to after switching action terminates, and again triggers described first two-way switch and described second two-way switch。
Optionally, described control loop also includes: communication module；
Described communication module, for the data that described detection module detects are uploaded to host computer, is driven the running of described moving contact by described host computer according to the Data Control driving device received。
Optionally, described control loop also includes: power module；
Described power module is with described level winding voltage for input voltage, and is described control loop power supply。
Optionally, the bridging time of described First Transition contact and described second transition contact is more than 10ms。
Optionally, also include: limit offside shelves；
The offside shelves of described restriction, are used for preventing described moving contact from sliding into first static contact or last static contact。
As shown from the above technical solution, the transformator that the present invention proposes is without arc load ratio bridging switch, by using circuit as transition branch road, break-make with the current control circuit according to two-way switch anode-cathode voltage state or diverter, while realizing switching without arcing, reduce switching loss, reduce switch cost。
Accompanying drawing explanation
Being more clearly understood from the features and advantages of the present invention by reference accompanying drawing, accompanying drawing is schematic and should not be construed as and the present invention is carried out any restriction, in the accompanying drawings:
Fig. 1 illustrates transformator that one embodiment of the invention the provides structural representation without arc load ratio bridging switch；
Fig. 2 illustrates transformator that another embodiment of the present invention the provides structural representation without arc load ratio bridging switch；
Fig. 3 illustrates that transformator that one embodiment of the invention provides is without the structural representation controlling loop in arc load ratio bridging switch；
Fig. 4 illustrates transformator that one embodiment of the invention the provides schematic flow sheet without the handoff procedure of arc load ratio bridging switch；
Fig. 5 illustrates transformator that one embodiment of the invention the provides schematic flow sheet without the control strategy of arc load ratio bridging switch；
Fig. 6 illustrates that transformator that one embodiment of the invention provides is without the arc load ratio bridging switch working state figure when reduction regulation；
Fig. 7 illustrates that transformator that one embodiment of the invention provides is without the arc load ratio bridging switch working state figure when boosting regulates。
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments。Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention。
The transformator that Fig. 1 provides for one embodiment of the invention is without the structural representation of arc load ratio bridging switch, with reference to Fig. 1, this transformator without arc load ratio bridging switch, including: control loop, moving contact and the static contact being connected with transformer tapping；
Described moving contact includes: main contact, First Transition contact and the second transition contact；
Described main contact is connected with transformer terminal, and described First Transition contact is connected with transformer terminal by the first two-way switch transition branch road, and described second transition contact is connected with transformer terminal by the second two-way switch transition branch road；
It will be appreciated that 1～8 be static contact in Fig. 1, it is connected with transformer tapping；N, X, Y and Z are junction point, and D point is main contact, and B point is First Transition contact, and A point is the second transition contact；Under the effect that outside mechanical/electromechanical drives, moving contact moves, and to connect from different target static contacts, and then changes the coil turn accessed between N and X, reaches pressure regulation purpose；
When steady operation, described main contact, described First Transition contact are all connected with current static contact, and by described main contact On current；
When performing switching action, triggering the first two-way switch of described first two-way switch transition branch road in advance, after main contact disconnects, electric current is transferred to described 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, then stop triggering described first two-way switch；
If the terminal voltage of described first two-way switch is level winding voltage, then trigger described second two-way switch；After described main contact and described second transition contact are all overlapped on next static contact, stop triggering described second two-way switch, by described main contact On current；
It should be noted that when steady operation, main contact and static contact 6 are reliably connected, and this static contact is also reliably connected with First Transition contact B；Second transition contact A is in floating state；
Switching switch receives host computer blood pressure lowering switching command, and mechanical mechanism rotates, and drives load ratio bridging switch shaft core to turn clockwise, described static contact 6 is switched to static contact 7。
Described control loop, for detecting described first two-way switch and the terminal voltage of described second two-way switch, produces to trigger signal according to described terminal voltage, and sends described triggering signal to described first two-way switch or described second two-way switch。
It should be noted that, control loop after the terminal voltage two two-way switch being detected, terminal voltage will be judged, with obtain two two-way switch terminal voltage whether for conduction voltage drop or level winding voltage, and based on judged result trigger or stop trigger two two-way switch；It is appreciated that the terminal voltage that criterion is two-way switch that uses of the present invention and level winding voltage, the relatively detection magnitude of current, easy to detect a lot。
The present invention using circuit as transition branch road, replace transition resistance of the prior art, in handoff procedure, to be turned on and off on request by two-way switch terminal voltage state situation of change control circuit, while realizing switching without arcing, reduce switching loss and switch cost。
The transformator that Fig. 2 provides for another embodiment of the present invention is without the structural representation of arc load ratio bridging switch, and with reference to Fig. 2, static contact is circle bulge-structure, and described main contact is round recessed structure；
Described First Transition contact and described second transition contact are strip slide vane structure；
Static contact can be slidably connected with described First Transition contact, described main contact and described second transition contact successively according to preset order。
It should be noted that switching switch integrates tap selection and tap changing function, described switching switch comprises 3 moving contacts and several static contacts；Described moving contact is a straight-through mechanical main contact and two transition contacts；Described main contact is round recessed structure, narrow contact surface；Said two transition contact is strip slide vane structure, wide contact surface；In described moving contact, main contact is positioned in the middle part of horizontal plane, and two other transition contact adheres to lower horizontal plane two-layer separately；In described moving contact, main contact place vertical is near load ratio bridging switch center axis, and two other two-way switch transition contact belongs to a vertical together, outside axle center；In described moving contact, two transition contacts have projected overlapping region on the vertical plane；Described static contact is circle bulge-structure, narrow contact surface。
It will be appreciated that in the process being switched to next static contact by the static contact currently turned on, moving contact moves, so that there is relative motion between moving contact and static contact；
During with clockwise movement, static contact will be slidably connected with described main contact, described First Transition contact and described second transition contact successively；
During with counterclockwise movement, static contact will be slidably connected with described main contact, described second transition contact and described First Transition contact successively；
Further, for default sequence of motion, including following kinestate:
Kinestate one, the first static contact slides move with the surface of First Transition contact in the round recessed of main contact simultaneously, and after the first static contact disconnects with main contact, the first static contact individually slides on the surface of First Transition contact；
Kinestate two, the strip slide plate of the second transition contact overlaps to the second static contact, and now, the first static contact slides on the surface of First Transition contact, and the second static contact slides on the strip slide plate of First Transition contact；
Kinestate three, main contact and the second static contact connect, and the first static contact disconnects with First Transition joint, until the strip slide plate of two transition contacts and main contact are all connected with the second static contact；
Kinestate four, the second transition contact and the second static contact disconnect, and the second static contact slides move with the surface of First Transition contact in the round recessed of main contact simultaneously；
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, owing to coiling group is circular, therefore two transition contacts are designed as circular arc, but should not be construed as and be only limited to circular arc；It addition, the order of moving contact motion is also controlled；
Further, the shape of coiling group is alternatively other shapes, no longer limits herein；Correspondingly, between static contact and moving contact, the direction of relative motion will have and change adaptively；Such as, when coiling group is linear, static contact and moving contact will do relatively linear reciprocating motion。
In the present embodiment, described first two-way switch transition branch road and described second two-way switch transition branch road are composed in series by a two-way switch and a fastp-acting fuse, an outside buffer circuit in parallel and a current-limiting circuit。
It should be noted that two-way switch can adopt half control device IGCT or full-controlled device IGBT, MOSFET, buffer circuit is resistance-capacitance circuit, and current-limiting circuit is ZnO circuit；
Further, when two-way switch adopts half control device IGCT, two IGCT combination types of attachment are that inverse parallel connects；When described two-way switch adopts full-controlled device IGBT, MOSFET, the combination type of attachment of two full-controlled device is that anti-series connects。
In a feasible embodiment, two-way switch conduction voltage drop is about positive and negative 1V, in order to avoid being obscured mutually with two-way switch conduction voltage drop by normal zero crossings magnitude of voltage, adopts the way of time delay sampling, it is to avoid the situation of zero crossings voltage erroneous judgement；
It should be noted that the present invention adopts hardware difference sample circuit and comparator circuit to constitute, hardware difference sample circuit is used for Real-time Collection two-way switch terminal voltage and level winding voltage, and sends to comparator circuit；Comparator circuit compares with threshold value for magnitude of voltage sampling obtained, with 2V for comparator threshold, adopt the way avoiding comparator threshold, sinusoidal AC voltage signal transit time between-2V～+2V is 18 μ s, as long as criterion time delay is more than 18 μ s, can accurately judge whether two-way switch pipe is on state, to escape normal voltage zero crossing situation。
In a feasible embodiment, the present invention is also provided with a diverter on the main line of described first two-way switch transition branch road and described second two-way switch transition branch road；
Correspondingly, described control loop is additionally operable to detect the electric current of described diverter, and the electric current according to described diverter sends trigger signal to described first two-way switch transition branch road and described second two-way switch transition branch road。
It should be noted that no matter be that other the parameter being used for judging also is feasible, is no longer defined with magnitude of voltage or the basis for estimation that all can use as the present invention using current value herein。
The transformator that Fig. 3 provides for one embodiment of the invention is without the structural representation controlling loop in arc load ratio bridging switch, and with reference to Fig. 3, this control loop includes: main control module 310, detection module 320 and trigger module 330；
Described detection module 320, the electric current of terminal voltage or described diverter for detecting described first two-way switch and described second two-way switch, and obtain duty and the operating position of described first two-way switch and described second two-way switch according to described terminal voltage or described electric current, and described duty and operating position are sent to described main control module 310；
Described main control module 310, for producing control signal according to the described duty received and operating position, and sends described control signal to described trigger module 330；
Described trigger module 330, for producing to trigger signal according to the described control signal received, and sends described triggering signal to corresponding two-way switch。
In order to improve the accuracy of detection of two-way switch terminal voltage, after described main control module 310 is additionally operable to the random time point before switching action terminates or switching action terminates, again trigger two-way switch。
It should be noted that buffer circuit has residual voltage in handoff procedure, cause two-way switch terminal voltage survey problem by mistake, cause program to judge by accident, it is impossible to realize normal switching。By in a program, when switching clockwise (reduction regulation), there is main contact and described First Transition contact, the second transition contact are all overlapped on the operating mode of next static contact, the residual voltage of buffer circuit can be discharged by main contact；When switching counterclockwise (boosting regulates), it is absent from main contact and described First Transition contact, the second transition contact are all overlapped on the operating mode of next static contact, two-way switch need to be separately provided and trigger link, previous stage in each finishing switching, individually again trigger two-way switch, the electric energy of release buffering electric capacity, it is prevented that the erroneous judgement that pressure regulation next time causes。
In the present embodiment, control loop and also include: communication module 340；
Described communication module 340, for the data that described detection module 320 detects are uploaded to host computer, is driven the running of described moving contact by described host computer according to the Data Control driving device received。
It should be noted that the data sent according to communication module 340 are judged by host computer, generate instruction, and sent to corresponding module by communication module 340。
In the present embodiment, control loop and also include: power module 350；
Described power module 350 is with described level winding voltage for input voltage, and is described control loop power supply。
It should be noted that power module 350 obtains level winding voltage by power taking contact E, after carrying out shaping, provide direct current energy to each modular unit；
Wherein, described power taking contact E can have different connection, determines in combinations with actual condition。
In the present embodiment, the bridging time of described First Transition contact and described second transition contact is more than 10ms。
It should be noted that, described moving contact handoff procedure is that exterior mechanical mechanism has driven, and is not controlled by electric part of the present invention, all realizes switching at zero crossing in order to ensure three-phase, requiring that two transition contact bridging times of A, B cannot be less than 10ms, the switching of three-phase zero passage leaves enough time nargin。
In the present embodiment, transformator is additionally provided with the offside shelves of restriction without arc load ratio bridging switch；
The offside shelves of described restriction, are used for preventing described moving contact from sliding into first static contact and last static contact。
It should be noted that, power taking contact E is when design, need the consideration can power taking problem, when described moving contact slides into 1 or 9 gear, there is power taking contact cannot the situation of power taking, so should consider in design to arrange the offside shelves of restriction, can not obtaining electric in case controlling loop, moving contact cannot complete to switch without arc transition；
Such as, in winding shown in Fig. 1, power taking contact E is positioned at the right side of transition contact B, when the direction of rotation of moving contact is 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 cannot the situation of power taking, thus static contact 1 is replaced with spacing shelves 1 by the present invention；
In like manner, if power taking contact E is positioned at the left side of transition contact A in winding, when the direction of rotation of moving contact is clockwise, power taking contact rotates and connects static contact 5,6,7,8 with this, but when moving contact rotates and is connected with static contact 9, power taking contact will be in vacant state, now will appear from cannot the situation of power taking, thus static contact 9 is replaced with spacing shelves 9 by the present invention。
The transformator that Fig. 4 provides for one embodiment of the invention is without the schematic flow sheet of the handoff procedure of arc load ratio bridging switch, and with reference to Fig. 4, to switch to static contact 7 from static contact 6, concrete regulating step is as follows:
(1). main contact D and transition contact B is connected on static contact 6, main contact On current, and two-way switch a, b are not triggered。
(2). trigger two-way switch b in advance, be then turned off main contact D, by transition contact B afterflow。
(3). (3.1) transition contact A snaps into next static contact 7, and two-way switch a does not trigger, and electric current still flows through from transition contact B。
(3.2) stopping the triggering to two-way switch b, after current zero-crossing point, two-way switch b turns off naturally, now triggers two-way switch a immediately, and electric current flows through from transition contact A。Owing to being the switching electric current when 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 zero current situation, it does not have electric arc；Now continue to trigger two-way switch a, by transition contact A afterflow。
(5). transition contact B also snaps into static contact 7, for simplifying control, does not trigger two-way switch b, still by transition contact A On current。
(6). main contact D and transition contact A, B snap into next static contact 7, main contact D On current simultaneously。
(7). transition contact A disconnects in no-voltage situation, and main contact D is transition contact B short circuit, main contact D On current。
Described similar with moving contact reduction regulation clockwise, moving contact rotates boosting counterclockwise and regulates, static contact 6 be switched to static contact 5, and handoff procedure is contrary with reduction regulation process。
The transformator that Fig. 5 provides for one embodiment of the invention is without the schematic flow sheet of the control strategy of arc load ratio bridging switch, and with reference to Fig. 5, wherein, a pipe is IGCT a, namely two-way switch a；
Static contact for static contact 6 for current conducting below, is described in detail to control strategy:
After receiving the step-down instruction that host computer sends, driving device rotates, load ratio bridging switch shaft core is driven to turn clockwise, rotated to static contact 7 direction by static contact 6, before main contact disconnects with static contact 6, first trigger two-way switch b, it is judged that whether the pressure drop of two-way switch b terminal voltage is about ± 1, if it is not, then again detect the pressure drop of two-way switch b terminal voltage；
If so, two-way switch b conducting is then triggered；Whether the voltage difference judging two-way switch a end is to bear step voltage, if it is not, then again detect the voltage difference of two-way switch a end；
If so, stop triggering two-way switch b, then judge whether the voltage difference of two-way switch b end is to bear step voltage, if it is not, then again detect the voltage difference of two-way switch b end；
If so, then trigger two-way switch a conducting, control to terminate；
After receiving the boost instruction that host computer sends, driving device rotates, load ratio bridging switch shaft core is driven to rotate counterclockwise, rotated to static contact 5 direction by static contact 6, before main contact disconnects with static contact 6, first trigger two-way switch a, it is judged that whether the pressure drop of two-way switch a terminal voltage is about ± 1, if it is not, then again detect the pressure drop of two-way switch a terminal voltage；
If so, two-way switch a conducting is then triggered；Whether the voltage difference judging two-way switch b end is to bear step voltage, if it is not, then again detect the voltage difference of two-way switch b end；
If so, stop triggering two-way switch a, then judge whether the voltage difference of two-way switch a end is to bear step voltage, if it is not, then again detect the voltage difference of two-way switch a end；
If so, then trigger two-way switch b conducting, control to terminate。
The transformator that Fig. 6 provides for one embodiment of the invention is without the arc load ratio bridging switch working state figure when reduction regulation, with reference to Fig. 6, wherein, (1)-(7) are corresponding with step (1)-(7) in above-mentioned Fig. 4, and the D in figure is main contact, and A is the second transition contact, B is First Transition contact, a, b are two two-way switch, and 6 be stationary contact 6,7 is stationary contact 7；
The detailed content of depressurization step refers to the content that above-mentioned Fig. 4 is corresponding, no longer repeats herein。
The transformator that Fig. 7 provides for one embodiment of the invention is without the arc load ratio bridging switch working state figure when boosting regulates, with reference to Fig. 7；
Similar with moving contact reduction regulation clockwise, when boosting regulates, moving contact rotates dynamic counterclockwise, static contact 7 be switched to static contact 6, and handoff procedure is contrary with reduction regulation process, no longer repeats herein。
In sum, by the present invention in that with two-way switch and the activation schedule of two-way switch is controlled, it is achieved that the commutating without arcing of load ratio bridging switch, it is therefore prevented that cause fault spread when two-way switch breaks down, not damaging device and simple in construction, reliable operation。
Although being described in conjunction with the accompanying embodiments of the present invention, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such amendment and modification each fall within the scope being defined by the appended claims。
Claims (10)
1. a transformator is without arc load ratio bridging switch, it is characterised in that including: control loop, moving contact and the static contact being connected with transformer tapping；
Described moving contact includes: main contact, First Transition contact and the second transition contact；
Described main contact is connected with transformer terminal, and described First Transition contact is connected with transformer terminal by the first two-way switch transition branch road, and described second transition contact is connected with transformer terminal by the second two-way switch transition branch road；
When steady operation, described main contact, described First Transition contact are all connected with current static contact, and by described main contact On current；
When performing switching action, triggering the first two-way switch of described first two-way switch transition branch road in advance, after main contact disconnects, electric current is transferred to described 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, then stop triggering described first two-way switch；If the terminal voltage of described first two-way switch is level winding voltage, then trigger described second two-way switch；After described main contact and described second transition contact are all overlapped on next static contact, stop triggering described second two-way switch, by described main contact On current；
Described control loop, for detecting described first two-way switch and the terminal voltage of described second two-way switch, produces to trigger signal according to described terminal voltage, and sends described triggering signal to described first two-way switch or described second two-way switch。
2. circuit according to claim 1, it is characterised in that static contact is circle bulge-structure, and described main contact is round recessed structure；
Described First Transition contact and described second transition contact are strip slide vane structure；
Static contact can be slidably connected with described First Transition contact, described main contact and described second transition contact successively according to preset order。
3. circuit according to claim 1, it is characterized in that, described first two-way switch transition branch road and described second two-way switch transition branch road are composed in series by a two-way switch and a fastp-acting fuse, an outside buffer circuit in parallel and a current-limiting circuit。
4. circuit according to claim 1, it is characterised in that be also provided with a diverter on the main line of described first two-way switch transition branch road and described second two-way switch transition branch road；
Correspondingly, described control loop is additionally operable to:
Detect the electric current of described diverter, and send according to described electric current trigger signal to described first two-way switch and described second two-way switch。
5. circuit according to claim 3, it is characterised in that described control loop includes: main control module, detection module and trigger module；
Described detection module, the electric current of terminal voltage or described diverter for detecting described first two-way switch and described second two-way switch, and obtain duty and the operating position of described first two-way switch and described second two-way switch according to described terminal voltage or described electric current, and described duty and operating position are sent to described main control module；
Described main control module, for producing control signal according to the described duty received and operating position, and sends described control signal to described trigger module；
Described trigger module, for producing to trigger signal according to the described control signal received, and sends described triggering signal to corresponding two-way switch。
6. circuit according to claim 5, it is characterised in that described main control module is additionally operable to after switching action terminates, triggers described first two-way switch and described second two-way switch again。
7. circuit according to claim 5, it is characterised in that described control loop also includes: communication module；
Described communication module, for the data that described detection module detects are uploaded to host computer, is driven the motion of described moving contact by described host computer according to the Data Control driving device received。
8. circuit according to claim 5, it is characterised in that described control loop also includes: power module；
Described power module is with described level winding voltage for input voltage, and is described control loop power supply。
9. circuit according to claim 1, it is characterised in that the bridging time of described First Transition contact and described second transition contact is more than 10ms。
10. circuit according to claim 1, it is characterised in that also include: limit offside shelves；
The offside shelves of described restriction, are used for preventing described moving contact from sliding into first static contact or last static contact。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN105702494B CN105702494B (en) | 2018-02-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068368A (en) * | 2017-05-11 | 2017-08-18 | 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 |
| CN113363992A (en) * | 2021-06-18 | 2021-09-07 | 哈尔滨硕诺科技有限公司 | Non-impact pressure regulating control device |
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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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| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068368A (en) * | 2017-05-11 | 2017-08-18 | 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 |
| 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 |
| CN113363992A (en) * | 2021-06-18 | 2021-09-07 | 哈尔滨硕诺科技有限公司 | Non-impact pressure regulating control device |
| 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 | Publication date |
|---|---|
| CN105702494B (en) | 2018-02-06 |
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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 |