CN204117890U - A kind of current interruption arc-control device based on nonlinear resistance - Google Patents
A kind of current interruption arc-control device based on nonlinear resistance Download PDFInfo
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- CN204117890U CN204117890U CN201420504635.0U CN201420504635U CN204117890U CN 204117890 U CN204117890 U CN 204117890U CN 201420504635 U CN201420504635 U CN 201420504635U CN 204117890 U CN204117890 U CN 204117890U
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- tetrode thyristor
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Abstract
The utility model proposes a kind of current interruption arc-control device based on nonlinear resistance, solve existing Arc Distinguishing Device for Circuit Breakers when high-current on-off, produce strong electric arc because arc extinguishing is indifferent, thus the life-span reducing circuit breaker itself even burns out the problem of contact.Device comprises: reverse-blocking tetrode thyristor, shunting electronic building brick, time relay circuit; Described shunting electronic building brick comprises ZnO resistors and PTC thermistor, and described ZnO resistors is connected with parallel way with macromolecular thermosensitive resistor; Described time relay circuit comprises switch, a control circuit; A described switch is in parallel with reverse-blocking tetrode thyristor, and described SCR control interface is connected with control circuit negative pole interface, and control circuit positive pole pole interface is connected with reverse-blocking tetrode thyristor anode interface; Described reverse-blocking tetrode thyristor positive pole is also connected with shunting electronic building brick negative pole.
Description
Technical field
This method belongs to DC circuit breaker arc extinguishing field, is a kind ofly to utilize the characteristic of nonlinear resistance and the Arc-extinguishing Devices of DC Circuit Breakers designed and method.
Technical background
Along with the progress of science and technology, just applied more and more widely as the HVDC Transmission Technology solving high voltage, Large Copacity, long distance power delivery and Asynchronous Interconnection important means.Compare ac transmission, direct current transportation has good economic benefit and superior operation characteristic.But DC circuit breaker becomes " bottleneck " problem of direct current power system.The subject matter of DC circuit breaker is exactly that do not have can the current zero of direct extinguish arcs.Therefore, direct current cut-offs sixty-four dollar question, is will adopt an effective measure to allow breaking direct current create zero crossing, makes arc current be reduced to zero, so that extinguish arcs.The most frequently used method is exactly reverse voltage method, but this arc-suppressing method inevitably also exists the loss of contact and arc-chute, and in order to maintain its reliability, then needs to carry out continually safeguarding and check.In addition, owing to needing large arc gap and flashover distance and being difficult to miniaturization.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of current interruption arc-control device based on nonlinear resistance and method, solve existing Arc Distinguishing Device for Circuit Breakers and produce strong electric arc because arc extinguishing is indifferent when high-current on-off, thus the life-span reducing circuit breaker itself even burns out the problem of contact.This device is characteristic based on nonlinear resistance and the Arc-extinguishing Devices of DC Circuit Breakers designed, reduce the electric arc of DC circuit breaker when cut-offfing by the shunting of circuit and the current limiting capacity of nonlinear resistance, improve circuit breaker pitch capability and the object in life-span to reach.
Concrete technical scheme is as follows:
Based on a current interruption arc-control device for nonlinear resistance, it is characterized in that described device comprises: reverse-blocking tetrode thyristor, shunting electronic building brick, time relay circuit; Described shunting electronic building brick comprises ZnO resistors and PTC thermistor, and described ZnO resistors is connected with parallel way with macromolecular thermosensitive resistor; Described time relay circuit comprises switch, a control circuit; A described switch is in parallel with reverse-blocking tetrode thyristor, and described SCR control interface is connected with control circuit negative pole interface, and control circuit anode interface is connected with reverse-blocking tetrode thyristor anode interface; Described reverse-blocking tetrode thyristor positive pole is also connected with shunting electronic building brick negative pole;
The described current interruption arc-control device based on nonlinear resistance in use, is installed in parallel on circuit breaker main contact.
Based on a current interruption arc-suppressing method for nonlinear resistance, adopt the above-mentioned current interruption arc-control device based on nonlinear resistance, it is characterized in that said method comprising the steps of:
Step 1, circuit breaker disconnects, time relay circuit release first time pulse, and shunting electronic building brick directly drops into circuit, and the control circuit in time relay circuit sends reverse-blocking tetrode thyristor triggering signal under pulse signal controls, conducting reverse-blocking tetrode thyristor, makes arc-control device circuit communication;
Step 2, for the first time end-of-pulsing, control circuit disconnects, and reverse-blocking tetrode thyristor triggering signal is removed; The macromolecular thermosensitive resistor now shunted in electronic building brick arrives high resistant, and in circuit, electric current is very little, but being still greater than silicon controlled maintains electric current, therefore needs to add to turn off silicon controlled circuit;
Step 3, the pulse of time relay circuit release second time, control a switch and close, circuital current is directly by a switch, and reverse-blocking tetrode thyristor is shorted and turns off;
Step 4, time relay circuit second time end-of-pulsing, controls a switch and disconnects, because the input shunting electronic building brick makes circuital current reduce, reach breaker circuit and disconnect object without electric arc.
Beneficial effect:
1. the present invention is characteristic based on nonlinear resistance and the Arc-extinguishing Devices of DC Circuit Breakers designed and method, have employed the principle of shunting, make circuit breaker main contact not need to bear the task of disjunction amplitude direct current, thus indirectly improve breaking capacity and the useful life of circuit breaker itself;
2. shunting electronic building brick of the present invention adopts non-linear ZnO resistors and macromolecular thermosensitive resistor, effectively can limit the size of the electric current of electronic building brick branch road according to its characteristic, makes more easily to cut off whole loop.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention structural representation.
Embodiment
For making object of the invention process, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the technical scheme in the invention process is clearly and completely described:
A kind of current interruption arc-control device based on nonlinear resistance as shown in Figure 1, comprising: shunting electronic building brick 1, reverse-blocking tetrode thyristor 2, time relay circuit 4; Described shunting electronic building brick 1 comprises ZnO resistors 1-1 and macromolecular thermosensitive resistor 1-2, and described ZnO resistors 1-1 is connected with parallel way with macromolecular thermosensitive resistor 1-2; Described time relay circuit 4 comprises a switch 4-2, control circuit 4-1; A described switch 4-2 is in parallel with reverse-blocking tetrode thyristor 2, and described SCR control interface is connected with control circuit negative pole interface, and control circuit positive pole pole interface is connected with reverse-blocking tetrode thyristor anode interface; Described reverse-blocking tetrode thyristor anode interface is also connected with shunting electronic building brick negative pole interface;
The described current interruption arc-control device based on nonlinear resistance in use, is installed in parallel on circuit breaker main contact 3.
Adopt the above-mentioned current interruption arc-control device based on nonlinear resistance, carry out comprising following content when cut-offfing without electric arc:
Step 1, circuit breaker 3 disconnects, time relay circuit 4 discharges first time pulse, and shunting electronic building brick 1 directly drops into circuit, and the control circuit 4-1 in time relay circuit sends reverse-blocking tetrode thyristor triggering signal under pulse signal controls, conducting reverse-blocking tetrode thyristor 2, makes arc-control device circuit communication;
Step 2, for the first time end-of-pulsing, control circuit 4-1 disconnects, and reverse-blocking tetrode thyristor triggering signal is removed; The macromolecular thermosensitive resistor 1-1 now shunted in electronic building brick arrives high resistant, and in circuit, electric current is very little, but is still greater than the maintenance electric current of reverse-blocking tetrode thyristor 2, therefore needs to add the circuit turning off reverse-blocking tetrode thyristor;
Step 3, time relay circuit 4 discharges second time pulse, and control a switch 4-2 and close, circuital current is directly by a switch, and reverse-blocking tetrode thyristor 2 is shorted and turns off;
Step 4, time relay circuit 4 second time end-of-pulsing, control a switch 4-2 and disconnect, whole circuit disconnects; Because the input shunting electronic building brick makes circuital current reduce, reach breaker circuit and disconnect object without electric arc.
Claims (2)
1. based on a current interruption arc-control device for nonlinear resistance, it is characterized in that described device comprises: reverse-blocking tetrode thyristor, shunting electronic building brick, time relay circuit; Described shunting electronic building brick comprises ZnO resistors and PTC thermistor, and described ZnO resistors is connected with parallel way with macromolecular thermosensitive resistor; Described time relay circuit comprises switch, a control circuit; A described switch is in parallel with reverse-blocking tetrode thyristor, and described SCR control interface is connected with control circuit negative pole interface, and control circuit positive pole pole interface is connected with reverse-blocking tetrode thyristor anode interface; Described reverse-blocking tetrode thyristor positive pole is also connected with shunting electronic building brick negative pole.
2., as claimed in claim 1 based on the current interruption arc-control device of nonlinear resistance, it is characterized in that, described device is installed in parallel in use on circuit breaker main contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504635.0U CN204117890U (en) | 2014-09-03 | 2014-09-03 | A kind of current interruption arc-control device based on nonlinear resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504635.0U CN204117890U (en) | 2014-09-03 | 2014-09-03 | A kind of current interruption arc-control device based on nonlinear resistance |
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| Publication Number | Publication Date |
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| CN204117890U true CN204117890U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420504635.0U Expired - Fee Related CN204117890U (en) | 2014-09-03 | 2014-09-03 | A kind of current interruption arc-control device based on nonlinear resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241058A (en) * | 2014-09-03 | 2014-12-24 | 江苏江城电气有限公司 | Current open circuit arc extinguishing device and method based on nonlinear resistor |
-
2014
- 2014-09-03 CN CN201420504635.0U patent/CN204117890U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241058A (en) * | 2014-09-03 | 2014-12-24 | 江苏江城电气有限公司 | Current open circuit arc extinguishing device and method based on nonlinear resistor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20190903 |
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| CF01 | Termination of patent right due to non-payment of annual fee |