CN110838422A - A fast switch for intelligent power distribution network - Google Patents
A fast switch for intelligent power distribution network Download PDFInfo
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- CN110838422A CN110838422A CN201911235179.8A CN201911235179A CN110838422A CN 110838422 A CN110838422 A CN 110838422A CN 201911235179 A CN201911235179 A CN 201911235179A CN 110838422 A CN110838422 A CN 110838422A
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- resistor
- supporting plate
- excitation coil
- distribution network
- power distribution
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- 230000005284 excitation Effects 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 230000003068 static effect Effects 0.000 claims abstract description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 10
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- 239000011787 zinc oxide Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052573 porcelain Inorganic materials 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a quick switch for an intelligent power distribution network, which comprises: the driving control mechanism is electrically connected with the repulsion mechanism; the repulsion mechanism comprises a base, a holding module, a moving rod, a switching-off excitation coil, a switching-on excitation coil, a repulsion plate, a static contact and a moving contact, wherein one end of the holding module is connected with the inner wall of the base in a sliding manner, and the other end of the holding module is connected with the moving rod; a first supporting plate and a second supporting plate are fixed on the base, the first supporting plate is positioned below the second supporting plate, a closing excitation coil is installed at the top end of the first supporting plate, an opening excitation coil is installed at the bottom end of the second supporting plate, and a repulsion disc is positioned between the closing excitation coil and the opening excitation coil; the top end of the moving rod penetrates through the first supporting plate, the repulsion plate and the second supporting plate and then is connected with a transverse plate, moving contacts are connected to two sides of the transverse plate, and static contacts are arranged above the moving contacts. The invention has simple structure and convenient use, and shortens the switching-off time and the switching-on time compared with the traditional circuit breaker with a spring mechanism.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to a quick switch for an intelligent power distribution network.
Background
The fast switch is a breaker capable of compressing the fault clearing time to be within 1 cycle, has higher action speed and can realize 'first-wave on-off'. At present, most of the speed opening switch devices in the power grid adopt spring operating mechanisms, so that the number of transmission parts is large, the structure is complex, the action time is long, and if the spring operating mechanisms are adopted for quick switching, the switching-off time and the switching-on time are long, and the dispersity is large.
Therefore, how to provide a fast switch for a smart distribution network with fast switching speed is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a quick switch for an intelligent power distribution network, which is simple in structure and convenient to use, and shortens the opening time and the closing time compared with the traditional breaker with a spring mechanism.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fast switch for a smart distribution network, comprising: the driving control mechanism is electrically connected with the repulsion mechanism; the repulsion mechanism comprises a base, a holding module, a moving rod, a switching-off excitation coil, a switching-on excitation coil, a repulsion plate, a static contact and a moving contact, wherein one end of the holding module is connected with the inner wall of the base in a sliding manner, and the other end of the holding module is connected with the moving rod; a first supporting plate and a second supporting plate are fixed on the base, the first supporting plate is located below the second supporting plate, a closing excitation coil is installed at the top end of the first supporting plate, a breaking excitation coil is installed at the bottom end of the second supporting plate, the repulsion plate is fixed on the moving rod and located between the closing excitation coil and the breaking excitation coil; the top end of the moving rod penetrates through the first supporting plate, the repulsive force disc and the second supporting plate in sequence and then is connected with a transverse plate, the two sides of the transverse plate are both connected with the moving contact, and the fixed contact is arranged above the moving contact.
Preferably, the repulsion mechanism further comprises a vacuum arc extinguish chamber, and the fixed contact is arranged in the vacuum arc extinguish chamber.
Preferably, the base lateral wall is provided with a sliding groove, a plurality of silica gel protrusions which are arranged at equal intervals are arranged in the sliding groove, the retaining module comprises a fixed block and a connecting rod, the fixed block is arranged at the bottom of the moving rod, one end of the connecting rod is connected with the fixed block, and the other end of the connecting rod stretches into the sliding groove.
Preferably, an insulating porcelain column is installed on the moving rod and located between the transverse plate and the second supporting plate.
Preferably, the number of the drive control mechanisms is two, and the two drive control mechanisms comprise input modules, control modules and output modules, wherein the input modules are respectively and electrically connected with the control modules and the output modules; and the output modules of the two driving control mechanisms are respectively and electrically connected with the opening excitation coil and the closing excitation coil.
Preferably, the input module includes a power supply VCC, a resistor R1, a resistor R2, a MOS transistor Q1, and a diode D1; the power supply VCC is sequentially connected with the resistor R1 and the source electrode of the MOS transistor Q1 in series; the resistor R2 is connected between the source electrode and the gate electrode of the MOS transistor Q1 in parallel; the drain electrode of the MOS tube Q1 is connected with the diode D1; the gate of the MOS transistor Q1 is also connected with the control module.
Preferably, the control module comprises a control terminal, a MOS transistor Q2, a resistor R4, a resistor R5 and a resistor R7; the resistor R5 is connected in series between the grid electrode and the control end of the MOS transistor Q2; the gate of the MOS transistor Q2 is also connected with a grounded resistor R7; the source electrode of the MOS tube Q2 is grounded; the drain electrode of the MOS transistor Q2 is connected in series with a resistor R4; the other end of the resistor R4 is connected with the resistor R2.
Preferably, the output module includes a diode D2, a resistor R3, a resistor R6, a transistor Q3 and an output end, the anode of the diode D2 is connected to the cathode of the diode D1 through the resistor R3, the cathode of the diode D2 is connected to the emitter of the transistor Q3, the base of the transistor Q3 is connected to the resistor R3 and the resistor R6, the other end of the resistor R6 is connected to the collector of the transistor, and the resistor R6 is grounded.
Preferably, the fast switch is connected in parallel with a compensation circuit.
Preferably, the compensation circuit comprises a voltage transformer PT, a capacitor C1, a zinc oxide component, a damper and a resistor R8, wherein the parallel damper and resistor R8 are connected in series with the fast switch and then connected in parallel with the voltage transformer PT, the capacitor C1 and the damper.
The invention has the beneficial effects that:
the invention has simple structure and convenient use, the repulsion mechanism adopting high-speed eddy current is beneficial to improving the speed of opening and closing, the opening time and the closing time are shortened compared with the circuit breaker of the traditional spring mechanism, the motion precision of the moving rod is improved, and the repulsion mechanism does not need a mechanical disengaging and locking device, has few fault sources and can be operated safely and reliably for a long time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic view of a connecting structure of a connecting rod and a base according to the present invention.
Fig. 3 is a schematic circuit diagram of the drive control mechanism of the present invention.
Fig. 4 is a schematic diagram of the compensation circuit of the present invention.
Wherein, in the figure,
1-fast switch; 2-a base; 3-moving the rod; 4-opening the brake excitation coil; 5-closing the excitation coil; 6-repulsive force disk; 7-static contact; 8-moving contact; 9-a first support plate; 10-a second support plate; 11-a transverse plate; 12-a vacuum arc-extinguishing chamber; 13-a chute; 14-silica gel protrusions; 15-fixing block; 16-a connecting rod; 17-an insulating knob; an 18-zinc oxide component; 19-a damper.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, the present invention provides a fast switch for an intelligent power distribution network, including: the driving control mechanism is electrically connected with the repulsion mechanism; the repulsion mechanism comprises a base 2, a holding module, a moving rod 3, a brake-separating excitation coil 4, a brake-closing excitation coil 5, a repulsion plate 6, a static contact 7 and a moving contact 8, wherein one end of the holding module is connected with the inner wall of the base 2 in a sliding manner, and the other end of the holding module is connected with the moving rod 3; a first support plate 9 and a second support plate 10 are fixed on the base 2, the first support plate 9 is positioned below the second support plate 10, a closing excitation coil 5 is installed at the top end of the first support plate 9, a separating excitation coil 4 is installed at the bottom end of the second support plate 10, a repulsion disc 6 is fixed on the moving rod 3, and the repulsion disc 6 is positioned between the closing excitation coil 5 and the separating excitation coil 4; the top end of the moving rod 3 sequentially penetrates through the first supporting plate 9, the repulsive force plate 6 and the second supporting plate 10 and then is connected with a transverse plate 11, two sides of the transverse plate 11 are both connected with moving contacts 8, and a static contact 7 is arranged above the moving contacts 8.
The repulsion mechanism further comprises a vacuum arc extinguish chamber 12, and the static contact 7 is arranged in the vacuum arc extinguish chamber 12. The medium-high voltage circuit can be rapidly extinguished and current can be restrained after the power supply is cut off through the excellent vacuum insulation property in the vacuum arc extinguish chamber 12, and accidents are avoided.
Seted up spout 13 on the 2 lateral walls of base, installed the protruding 14 of silica gel of a plurality of equidistant settings in the spout 13, silica gel protruding 14 is easily taken place to be out of shape under the exogenic action, keeps the module to include fixed block 15 and connecting rod 16, and fixed block 15 is installed in the 3 bottoms of carriage release lever, and connecting rod 16 one end links to each other with fixed block 15, and the other end stretches into in the spout 13. When the closing excitation coil 5 generates upward thrust on the repulsion plate 6, the moving rod 3 drives the connecting rod 16 to slide upwards in the chute 13, and the moving contact 8 is contacted with the static contact 7 and then plays a role in positioning under the action of the silica gel bulge 14; when the brake-separating excitation coil 4 generates a downward thrust to the repulsion disk 6, the moving rod 3 drives the connecting rod 16 to slide downwards in the sliding groove 13, the moving contact 8 is separated from the static contact 7, and a positioning effect is achieved under the action of the silica gel bulge 14, so that the states of opening and closing and opening of the switch are kept.
In another embodiment, an insulating porcelain 17 is mounted on the moving rod 3, and the insulating porcelain 17 is located between the cross plate 11 and the second support plate 10. The insulating effect can be played between the second supporting plate 10 and the transverse plate 11, and the interference on the static contact 7 or the moving contact 8 is avoided.
The two driving control mechanisms comprise an input module, a control module and an output module, wherein the input module is electrically connected with the control module and the output module respectively; and the output modules of the two driving control mechanisms are respectively and electrically connected with the opening excitation coil and the closing excitation coil.
The input module comprises a power supply VCC, a resistor R1, a resistor R2, a MOS transistor Q1 and a diode D1; the power supply VCC is sequentially connected in series with the resistor R1 and the source electrode of the MOS transistor Q1; a resistor R2 is connected in parallel between the source and the gate of the MOS transistor Q1; the drain electrode of the MOS tube Q1 is connected with a diode D1; the gate of the MOS transistor Q1 is also connected to the control module.
The control module comprises a control end, a MOS transistor Q2, a resistor R4, a resistor R5 and a resistor R7; a resistor R5 is connected in series between the grid of the MOS transistor Q2 and the control end; the gate of the MOS transistor Q2 is also connected with a grounded resistor R7; the source electrode of the MOS tube Q2 is grounded; the drain electrode of the MOS tube Q2 is connected in series with a resistor R4; the other end of the resistor R4 is connected to a resistor R2.
The output module comprises a diode D2, a resistor R3, a resistor R6, a triode Q3 and an output end, wherein the anode of the diode D2 is connected with the cathode of a diode D1 through a resistor R3, the cathode of the diode D2 is connected with the emitter of the triode Q3, the base of the triode Q3 is respectively connected with the resistor R3 and the resistor R6, the other end of the resistor R6 is connected with the collector of the triode, and the resistor R6 is grounded.
According to the invention, through the matched arrangement of the input module, the control module and the output module, the electrification control of the opening excitation coil and the closing excitation coil is realized, so that the driving of a quick switch is completed.
The quick switch is connected with a compensation circuit in parallel, so that the problem of low voltage at the tail end of a heavy-load line can be solved, and the problem of tail end voltage warping of the line during light load or no load can be solved.
The compensation circuit comprises a voltage transformer PT, a capacitor C1, a zinc oxide assembly 18, a damper 19 and a resistor R8, wherein the parallel damper 19 and the resistor R8 are connected in series with the fast switch 1 and then are connected in parallel with the voltage transformer PT, the capacitor C1 and the damper 19. When the quick switch 1 is in an opening state and the zinc oxide component 18 is not conducted in normal operation, the capacitor C1 is connected in series in a circuit, and the function of series compensation can be effectively played. When a short circuit occurs at the downstream of the compensation circuit, the zinc oxide component 18 limits the voltage at two ends of the capacitor C1 to a lower level, the drive control mechanism controls the quick switch 1 to be switched on within 15ms, the capacitor C1 and the zinc oxide component 18 are in short circuit, the capacitor C1 is reliably protected from being damaged, and meanwhile, the short circuit current is limited to the level before compensation.
The invention has simple structure and convenient use, the repulsion mechanism adopting high-speed eddy current is beneficial to improving the speed of opening and closing, the opening time and the closing time are shortened compared with the circuit breaker of the traditional spring mechanism, the motion precision of the moving rod is improved, and the repulsion mechanism does not need a mechanical disengaging and locking device, has few fault sources and can be operated safely and reliably for a long time.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A fast switch for a smart distribution network, comprising: the driving control mechanism is electrically connected with the repulsion mechanism; the repulsion mechanism comprises a base, a holding module, a moving rod, a switching-off excitation coil, a switching-on excitation coil, a repulsion plate, a static contact and a moving contact, wherein one end of the holding module is connected with the inner wall of the base in a sliding manner, and the other end of the holding module is connected with the moving rod; a first supporting plate and a second supporting plate are fixed on the base, the first supporting plate is located below the second supporting plate, a closing excitation coil is installed at the top end of the first supporting plate, a breaking excitation coil is installed at the bottom end of the second supporting plate, the repulsion plate is fixed on the moving rod and located between the closing excitation coil and the breaking excitation coil; the top end of the moving rod penetrates through the first supporting plate, the repulsive force disc and the second supporting plate in sequence and then is connected with a transverse plate, the two sides of the transverse plate are both connected with the moving contact, and the fixed contact is arranged above the moving contact.
2. The fast switch for the intelligent power distribution network according to claim 1, wherein the repulsive force mechanism further comprises a vacuum arc extinguish chamber, and the fixed contact is disposed in the vacuum arc extinguish chamber.
3. The quick switch for the intelligent power distribution network according to claim 1 or 2, wherein a sliding groove is formed in a side wall of the base, a plurality of silica gel protrusions arranged at equal intervals are installed in the sliding groove, the retaining module comprises a fixed block and a connecting rod, the fixed block is installed at the bottom of the moving rod, one end of the connecting rod is connected with the fixed block, and the other end of the connecting rod extends into the sliding groove.
4. The fast switch for the intelligent power distribution network as claimed in claim 1, wherein the moving rod is provided with an insulating porcelain column, and the insulating porcelain column is located between the transverse plate and the second supporting plate.
5. The quick switch for the intelligent power distribution network according to claim 1, wherein the driving control mechanism is provided with two driving control mechanisms, and comprises an input module, a control module and an output module, wherein the input module is electrically connected with the control module and the output module respectively; and the output modules of the two driving control mechanisms are respectively and electrically connected with the opening excitation coil and the closing excitation coil.
6. The fast switch for the intelligent power distribution network according to claim 5, wherein the input module comprises a power supply VCC, a resistor R1, a resistor R2, a MOS transistor Q1 and a diode D1; the power supply VCC is sequentially connected with the resistor R1 and the source electrode of the MOS transistor Q1 in series; the resistor R2 is connected between the source electrode and the gate electrode of the MOS transistor Q1 in parallel; the drain electrode of the MOS tube Q1 is connected with the diode D1; the gate of the MOS transistor Q1 is also connected with the control module.
7. The fast switch for the intelligent power distribution network according to claim 6, wherein the control module comprises a control terminal, a MOS transistor Q2, a resistor R4, a resistor R5 and a resistor R7; the resistor R5 is connected in series between the grid electrode and the control end of the MOS transistor Q2; the gate of the MOS transistor Q2 is also connected with a grounded resistor R7; the source electrode of the MOS tube Q2 is grounded; the drain electrode of the MOS transistor Q2 is connected in series with a resistor R4; the other end of the resistor R4 is connected with the resistor R2.
8. The fast switch for the intelligent power distribution network according to claim 7, wherein the output module comprises a diode D2, a resistor R3, a resistor R6, a transistor Q3 and an output end, the anode of the diode D2 is connected to the cathode of the diode D1 through the resistor R3, the cathode of the diode D2 is connected to the emitter of the transistor Q3, the base of the transistor Q3 is connected to the resistor R3 and the resistor R6, the other end of the resistor R6 is connected to the collector of the transistor, and the resistor R6 is grounded.
9. The fast switch for a smart power distribution network as recited in claim 1 wherein said fast switch is connected in parallel with a compensation circuit.
10. The fast switch for the intelligent power distribution network as claimed in claim 9, wherein the compensation circuit comprises a voltage transformer PT, a capacitor C1, a zinc oxide component, a damper and a resistor R8, wherein the parallel damper and resistor R8 is connected in series with the fast switch and then connected in parallel with the voltage transformer PT, the capacitor C1 and the damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235179.8A CN110838422A (en) | 2019-12-05 | 2019-12-05 | A fast switch for intelligent power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235179.8A CN110838422A (en) | 2019-12-05 | 2019-12-05 | A fast switch for intelligent power distribution network |
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| Publication Number | Publication Date |
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| CN110838422A true CN110838422A (en) | 2020-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911235179.8A Pending CN110838422A (en) | 2019-12-05 | 2019-12-05 | A fast switch for intelligent power distribution network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114582684A (en) * | 2021-12-14 | 2022-06-03 | 浙江大学 | Current-limiting circuit breaker high-speed contact driving mechanism based on electromagnetic force |
-
2019
- 2019-12-05 CN CN201911235179.8A patent/CN110838422A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114582684A (en) * | 2021-12-14 | 2022-06-03 | 浙江大学 | Current-limiting circuit breaker high-speed contact driving mechanism based on electromagnetic force |
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