CN219418739U - Tapping conversion transition topology module of change-over switch of vacuum on-load tapping switch - Google Patents
Tapping conversion transition topology module of change-over switch of vacuum on-load tapping switch Download PDFInfo
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- CN219418739U CN219418739U CN202223546221.8U CN202223546221U CN219418739U CN 219418739 U CN219418739 U CN 219418739U CN 202223546221 U CN202223546221 U CN 202223546221U CN 219418739 U CN219418739 U CN 219418739U
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Abstract
The utility model discloses a tapping conversion transition topology module of a change-over switch of a vacuum type on-load tapping switch, which comprises the following components: main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Vacuum interrupter V 1 Vacuum interrupter V 2 And a transition resistance R; main contact M 1 Vacuum connection on-loadThe N tapping side of the tapping switch and the neutral point of the transformer; main contact M 2 Connecting an N+1 tapping side of the vacuum on-load tapping switch with a neutral point of the transformer; change-over switch T 1 One end and a vacuum interrupter V 1 The transition resistor R is connected, and the other end of the transition resistor R is connected with a neutral point of the transformer; change-over switch T 2 One end and a vacuum interrupter V 2 The N+1 tapping side is connected, and the other end is connected with a neutral point of the transformer; vacuum interrupter V 1 Connected in parallel with the transition resistor R, one end connected with the N tapping side, and the other end connected with the vacuum interrupter V 2 Switching contact T 1 Connecting; vacuum interrupter V 2 One end of (2) is connected with the N+1 tapping side and T 2 Connected at the other end to a vacuum interrupter V 1 Switching contact T 1 And is connected with the transition resistor R.
Description
Technical Field
The utility model relates to the technical field of on-load tap-changers for transformers, in particular to a tap-changing transition topology module of a change-over switch of a vacuum on-load tap-changer.
Background
An on-load tap changer is a device that operates under the excitation or load conditions of a transformer to change the tapping position of windings. The vacuum on-load tap-changer commonly used at present is a combined type and consists of a change-over switch, a tap selector and an electric mechanism. The change-over switch is a switching device which is used together with a tapping selector and is used for carrying, switching on and off current in a selected module, and consists of a quick mechanism, a switching mechanism, a transition resistor and an oil chamber. The switching process of the diverter switch is a combined mechanical and electrical process that uses the principle of a transition module to complete the electrical connection of the tap change. The switching topology modules are also diversified, and mainly the electric component structure of the transition module, the action sequence of each contact and the switching tasks born are inconsistent. The existing switching module has more tapping and conversion transitional processes, so that the mechanical structure is complex.
Disclosure of Invention
Aiming at the problems of asymmetric time sequence and complex mechanical structure of a change-over switch of a vacuum type on-load tap-changer in the prior art, which is used for switching from an odd tap to an even tap and from the even tap to the odd tap, the utility model provides a tap change transition topology module of the change-over switch of the vacuum type on-load tap-changer, which has the advantages of simple structure, few components, symmetric switching time sequence and easy realization of tap change in mechanical structure.
The utility model provides a tapping conversion transition topology module of a change-over switch of a vacuum type on-load tapping switch, which comprises the following components: main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Vacuum interrupter V 1 Vacuum interrupter V 2 And a transition resistance R;
main contact M 1 Connecting the N tapping side of the vacuum on-load tapping switch with a neutral point of the transformer;
main contact M 2 Connecting an N+1 tapping side of the vacuum on-load tapping switch with a neutral point of the transformer;
change-over switch T 1 One end and a vacuum interrupter V 1 The transition resistor R is connected, and the other end of the transition resistor R is connected with a neutral point of the transformer;
change-over switch T 2 One end and a vacuum interrupter V 2 The N+1 tapping side is connected, and the other end is connected with a neutral point of the transformer;
vacuum interrupter V 1 Is connected with the transition resistance R in parallel,V 1 one end is connected with the N tapping side, and the other end is connected with a vacuum current breaker V 2 Switching contact T 1 Connecting;
vacuum interrupter V 2 One end of (2) is connected with the N+1 tapping side and T 2 Connected at the other end to a vacuum interrupter V 1 Switching contact T 1 And is connected with the transition resistor R.
Optionally, the timing of switching the N tap side to the n+1 tap side and the timing of switching the n+1 tap side to the N tap side of the vacuum on-load tap switch are symmetrical.
Alternatively, the switching process of the vacuum on-load tap-changer and the task of breaking the current are performed by a vacuum interrupter V 1 And vacuum interrupter V 2 Bears the burden.
Optionally, when the gear of the vacuum on-load tap-changer is in the N tap, the main contact M 1 Closing, main contact M 2 Switch T is opened 1 The moving contact of the action arm is connected with the N tapping switch T 2 The moving contact of the action arm is connected with a transition resistor, and the vacuum interrupter V 1 Closing and vacuum interrupter V 2 Open at this time N-tap side load current I N Via main switch M 1 And outputting to a neutral point of the transformer.
Optionally, when the gear of the vacuum on-load tap-changer is in the n+1 tap, the main contact M 2 Closing, main contact M 1 Switch T is opened 2 The moving contact of the action end is connected with the N+1 tapping side and the change-over switch T 1 Moving contact, transition resistor R and vacuum interrupter V 1 Connection, vacuum interrupter V 1 Closing and vacuum interrupter V 2 Open at this time, N+1 tap side load current I N Via main contact M 2 And outputting to a neutral point of the transformer.
Therefore, the tapping change transition topology module of the change-over switch of the vacuum type on-load tapping switch has the advantages of simple structure, few components and symmetrical switching time sequence, the mechanical structure is easy to realize tapping change, and the problems of asymmetrical time sequence and complex mechanical structure of the change-over switch of the vacuum type on-load tapping switch from an odd tapping to an even tapping and from the even tapping to the odd tapping are solved.
Drawings
Exemplary embodiments of the present utility model may be more completely understood in consideration of the following drawings:
fig. 1 is a block diagram of a tap change transition topology module of a diverter switch of a vacuum type on-load tap changer according to an exemplary embodiment of the present utility model when the tap change transition topology module is in an N tap;
FIG. 2a is a schematic diagram of a transition module of an on-load tap changer from an N-tap side to an N+1-tap side according to an exemplary embodiment of the utility model;
FIG. 2b is a schematic diagram of a transition module of an on-load tap changer from an N-tap side to an N+1-tap side according to an exemplary embodiment of the utility model;
FIG. 2c is a schematic diagram of a transition module of an on-load tap changer from an N-tap side to an N+1-tap side according to an exemplary embodiment of the utility model;
FIG. 2d is a schematic diagram of a transition module of an on-load tap changer from an N-tap side to an N+1-tap side according to an exemplary embodiment of the utility model;
FIG. 2e is a schematic diagram of a transition module of an on-load tap changer from an N-tap side to an N+1-tap side according to an exemplary embodiment of the utility model;
FIG. 2f is a schematic diagram of a transition module of an on-load tap changer from an N-tap side to an N+1-tap side according to an exemplary embodiment of the utility model;
FIG. 2g is a schematic diagram of a transition module of an on-load tap changer from an N-tap side to an N+1-tap side according to an exemplary embodiment of the utility model;
FIG. 2h is a schematic diagram illustrating a transition module of an on-load tap changer from an N-tap side to an N+1-tap side according to an exemplary embodiment of the utility model;
fig. 3 is a block diagram of a tap changing topology module of a diverter switch of a vacuum type on-load tap changer according to an exemplary embodiment of the present utility model when the tap changing topology module is in an n+1 tap;
fig. 4 is a timing diagram of switching a transition module of a vacuum type on-load tap-changer from an N-tap side to an n+1-tap side according to an exemplary embodiment of the utility model.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other ways than those herein described and similar generalizations can be made by those skilled in the art without departing from the spirit of the application and the application is therefore not limited to the specific embodiments disclosed below.
As shown in fig. 1, the tapping conversion transition topology module of the diverter switch of the vacuum type on-load tapping switch provided by the application is composed of a main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Vacuum interrupter V 1 Vacuum interrupter V 2 And a transition resistance R. Wherein, the liquid crystal display device comprises a liquid crystal display device,
main contact M 1 Connecting the N tapping side of the vacuum on-load tapping switch with a neutral point of the transformer;
main contact M 2 Connecting an N+1 tapping side of the vacuum on-load tapping switch with a neutral point of the transformer;
change-over switch T 1 The fixed end of the (B) is connected with the neutral point of the transformer, and the change-over switch T 1 The action arm of the vacuum on-load tap-changer is connected with a transition resistor R and a vacuum interrupter V on the N tap side of the vacuum on-load tap-changer 1 Optionally switching;
change-over switch T 2 The fixed end of the (B) is connected with the neutral point of the transformer, and the change-over switch T 2 The operating arm of (2) is arranged on the N+1 tapping side of the vacuum on-load tapping switch and is connected with the vacuum interrupter V 2 Optionally switching;
vacuum tube V 1 Connecting transformer N tapping side and change-over switch T 1 The action end is connected with the transition resistor R in parallel; vacuum interrupter V 2 Connect transformer n+1 tapping side and change-over switch T 2 An action end;
one side of the transition resistor R is connected with a change-over switch T 1 The other side of the action end is connected with the main contact M 1 And T 1 And an action end.
The time sequence of switching from the N tapping side to the N+1 tapping side and the time sequence of switching from the N+1 tapping side to the N tapping side of the vacuum type on-load tapping switch are symmetrical time sequences.
The switching process of the vacuum on-load tap-changer and the task of cutting off the current are implemented by two vacuum tubes V 1 、V 2 Bears the burden.
As shown in fig. 1, a tap change transition topology module of a diverter switch of a vacuum type on-load tap changer provided by the application includes three phases, each phase including: main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Vacuum interrupter V 1 And V 2 And a transition resistance R.
The switching process of the tap-changing transition topology module of the switch of the vacuum type on-load tap-changer provided in the present application is further described below with reference to fig. 1 and fig. 2a to 2 h.
As shown in fig. 2, when the gear of the on-load tap-changer is in N tap, the main contact M 1 Closing, M 2 Switch T is opened 1 The moving contact of the action arm is connected with the N tapping switch T 2 The moving contact of the action arm is connected with a transition resistor, and the vacuum interrupter V 1 Closing and vacuum interrupter V 2 Open at this time N-tap side load current I N Via main switch M 1 And outputting to a neutral point of the transformer.
When the tapping switch is switched from the N tapping side to the N+1 tapping side, the operation steps of the transition module comprise:
as shown in fig. 2a, the main contact M is opened 1 At this time, N-tap side load current I N Through vacuum interrupter V 1 Change-over switch T 1 Outputting to a neutral point of a transformer;
as shown in fig. 2b, the vacuum interrupter V is opened 1 At this time, N-tap side load current I N Through the transition resistor R and the change-over switch T 1 Outputting to a neutral point of a transformer;
as shown in fig. 2c, the vacuum interrupter V is closed 2 The transition module is connected with the N tapping side and the N+1 branch at the same timeThe side is connected to form a bridge connection to generate a circulating current I C ＝U S R, the load current I N Transfer from the N tap side to the N+1 tap side, I N By vacuum interrupter V 2 And change-over switch T 1 And outputting to a neutral point of the transformer. Wherein the U is S Is the on-load tap-changer stage voltage;
as shown in fig. 2d, the transfer switch T is operated 2 An action end connected with the N+1 tapping side, wherein the load current I of the N+1 tapping side N Through the change-over switch T 2 And outputting to a neutral point of the transformer.
As shown in fig. 2e, the transfer switch T is operated 1 And the action end is disconnected with the transition resistor and the vacuum interrupter.
As shown in fig. 2f, the vacuum interrupter V is opened 2 。
As shown in fig. 2g, the vacuum interrupter V is closed 1 。
As shown in fig. 2h, the main contact M is closed 2 Load current I N From the n+1 tap side of the transformer via the main contact M 2 And outputting to a neutral point of the transformer.
When the tap selector switches from the N tap to the n+1 tap, the transition module switching timing diagram is shown in fig. 3.
As shown in fig. 3, when the gear of the on-load tap-changer is in the n+1 tap, the main contact M 2 Closing, M 1 Switch T is opened 2 The moving contact of the action end is connected with the N+1 tapping side and the change-over switch T 1 Moving contact, transition resistor R and vacuum interrupter V 1 Connection, vacuum interrupter V 1 Closing and vacuum tube V 2 Open at this time, N+1 tap side load current I N Via main contact M 2 And outputting to a neutral point of the transformer.
When the tap selector switches from the N tap to the n+1 tap, the transition module switching timing diagram is shown in fig. 4.
When the tap selector is switched from the n+1 tap to the N tap, the switching timing diagram of the N tap to the n+1 transition module is symmetrical, i.e., the contact action sequence is not described in detail.
Therefore, the tapping change transition topology module of the change-over switch of the vacuum type on-load tapping switch has the advantages of simple structure, few components and symmetrical switching time sequence, the mechanical structure is easy to realize tapping change, and the problems of asymmetrical time sequence and complex mechanical structure of the change-over switch of the vacuum type on-load tapping switch from an odd tapping to an even tapping and from the even tapping to the odd tapping are solved.
The basic principle and main features of the present utility model and the technical effects resulting therefrom are described in detail above. It will be understood by those skilled in the art that the present utility model is not limited to the preferred embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. A tap changing transition topology module of a change-over switch of a vacuum type on-load tap changer, comprising: main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Vacuum interrupter V 1 Vacuum interrupter V 2 And a transition resistance R;
main contact M 1 Connecting the N tapping side of the vacuum on-load tapping switch with a neutral point of the transformer;
main contact M 2 Connecting an N+1 tapping side of the vacuum on-load tapping switch with a neutral point of the transformer;
change-over switch T 1 One end and a vacuum interrupter V 1 The transition resistor R is connected, and the other end of the transition resistor R is connected with a neutral point of the transformer;
change-over switch T 2 One end and a vacuum interrupter V 2 The N+1 tapping side is connected, and the other end is connected with a neutral point of the transformer;
vacuum interrupter V 1 Connected in parallel with the transition resistor R, V 1 One end is connected with the N tapping side, and the other end is connected with a vacuum current breaker V 2 Switching contact T 1 Connection；
Vacuum interrupter V 2 One end of (2) is connected with the N+1 tapping side and T 2 Connected at the other end to a vacuum interrupter V 1 Switching contact T 1 And is connected with the transition resistor R.
2. The tap changing transition topology of claim 1, wherein the timing of switching the N tap side to the n+1 tap side and the timing of the operation of switching the n+1 tap side to the N tap side of the vacuum on-load tap switch are symmetrical timings.
3. The tap-changing transition topology module of claim 1, wherein the switching process and current-breaking tasks of the vacuum on-load tap-changer are performed by a vacuum interrupter V 1 And vacuum interrupter V 2 Bears the burden.
4. The tap changing transition topology module of claim 1, wherein main contact M is configured to 1 Closing, main contact M 2 Switch T is opened 1 The moving contact of the action arm is connected with the N tapping switch T 2 The moving contact of the action arm is connected with a transition resistor, and the vacuum interrupter V 1 Closing and vacuum interrupter V 2 Open at this time N-tap side load current I N Via main switch M 1 And outputting to a neutral point of the transformer.
5. The tap changing transition topology module of claim 1, wherein when a gear of a vacuum on-load tap changer is in an n+1 tap, main contact M 2 Closing, main contact M 1 Switch T is opened 2 The moving contact of the action end is connected with the N+1 tapping side and the change-over switch T 1 Moving contact, transition resistor R and vacuum interrupter V 1 Connection, vacuum interrupter V 1 Closing and vacuum interrupter V 2 Open at this time, N+1 tap side load current I N Via main contact M 2 And outputting to a neutral point of the transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223546221.8U CN219418739U (en) | 2022-12-29 | 2022-12-29 | Tapping conversion transition topology module of change-over switch of vacuum on-load tapping switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223546221.8U CN219418739U (en) | 2022-12-29 | 2022-12-29 | Tapping conversion transition topology module of change-over switch of vacuum on-load tapping switch |
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| CN219418739U true CN219418739U (en) | 2023-07-25 |
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| CN202223546221.8U Active CN219418739U (en) | 2022-12-29 | 2022-12-29 | Tapping conversion transition topology module of change-over switch of vacuum on-load tapping switch |
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| CN (1) | CN219418739U (en) |
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