CN204348608U - A kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system - Google Patents
A kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system Download PDFInfo
- Publication number
- CN204348608U CN204348608U CN201420838017.XU CN201420838017U CN204348608U CN 204348608 U CN204348608 U CN 204348608U CN 201420838017 U CN201420838017 U CN 201420838017U CN 204348608 U CN204348608 U CN 204348608U
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- vacuum circuit
- vacuity
- line monitoring
- monitoring system
- circuit breakers
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Abstract
The utility model discloses a kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system, be made up of 3 transducers and a vacuum degree on-line computing model.Described vacuum degree on-line computing model comprises precision resistance, NPO level electric capacity, operational amplifier, microwave directional transmissions chip, AD converter, dsp chip.The utility model has stable performance, reliability is high, feasibility is strong, cost performance is high, easy to maintenance, be simple and easy to use.
Description
Technical field
The utility model belongs to technical field of power systems, relates to a kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system, specifically, relates to a kind of 10kV Vacuity of Vacuum Circuit Breakers on-line monitoring system.
Background technology
Vacuum high-pressure circuit breaker is one of most important equipment in electric power system; it mainly plays a part control, protection, Secure isolation in electrical network; there is good insulation preformance, open apart from little, arc voltage is low, arc energy is little, the electricapparatus life-span is high, the folding specified drop-out current series of advantages such as often; be commonly used in 10-35kV switch cubicle, its running status directly determines safety and the benefit of electric power system.Vacuum circuit-breaker vacuum degree in running can progressively decline, and vacuum leak to a certain extent, during divide-shut brake, can blast by switch.At present, electric power system mostly adopts AC voltage withstand test between vacuum circuit-breaker fracture to carry out vacuum degree measurement, and this technology only can detect that whether vacuum degree is intact, but not obvious to vacuum interrupter initial stage leak detection,, there is blind area on vacuum degree measurement in more not energetic vacuum degree.The hermetically-sealed construction of vacuum circuit-breaker complexity does not allow to overhaul with conventional means yet, therefore vacuum degree on-line monitoring has become the important topic in primary equipment repair based on condition of component field.
The proposition of vacuum circuit-breaker on-line monitoring is considered based on above-mentioned factor, according to on-the-spot needs, by application sensing technology, detection technique, filtering technique and Digital Signal Processing etc., analyze each component working situation of vacuum circuit-breaker, provide the real time status information of vacuum circuit-breaker, for traffic control and maintainer provide information fast and accurately.Vacuum circuit-breaker on-line monitoring can carry out long-term continuous monitoring to the important parameter of vacuum circuit-breaker, equipment real-time running state is provided, follows the tracks of the change of important parameter, determine its variation tendency, to have judged whether fault tendency, for vacuum circuit-breaker repair based on condition of component is accumulated experience and data.
At present, concerning the method for testing of vacuum degree of vacuum switch from large aspect, offline inspection and the large class of on-line checkingi two can be divided into.The method of offline inspection has a lot, as: industrial frequency withstand voltage method, getter embrane method, insulation resistance method, continuous current cut-off method, high-frequency current cut-offs method, arc voltage method and magnetic control discharge method, and all develop to obtain comparative maturity, but all can only carry out under power down mode.The method of on-line monitoring mainly contains coupling capacitance method, rotary electric field probe detection method, light-to-current inversion method, proportional difference probe detection method, acoustic method, pressure sensor method, Mini-size cold cathode magnetic control meter method, Electromagnetic Wave Detection method etc., current vacuum degree Study on on-line monitor method major part rests on theoretical research stage, there is no a kind of vacuum degree on-line monitoring method to be widely used, therefore, probe into stable performance, reliability is high, feasibility is strong, cost performance is high, easy to maintenance, a kind of Vacuity of Vacuum Circuit Breakers on-Line Monitor Device be simple and easy to, significantly.
Utility model content
In order to overcome defect of the prior art, solve the problems of the technologies described above, the utility model provides the Vacuity of Vacuum Circuit Breakers on-line monitoring system that a kind of exploitativeness is strong, good stability, reliability are high.
Its technical scheme is as follows:
A kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system, is made up of 3 transducers and a vacuum degree on-line computing model.
Preferably, described vacuum degree on-line computing model comprises precision resistance, NPO level electric capacity, operational amplifier, microwave directional transmissions chip, AD converter, dsp chip.
The beneficial effects of the utility model: stable performance, reliability is high, feasibility is strong, cost performance is high, easy to maintenance, be simple and easy to use
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model Vacuity of Vacuum Circuit Breakers on-line monitoring system.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is described in more detail.
With reference to Fig. 1, a kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system, is made up of 3 transducers (each 1 of A, B, C phase) and a vacuum degree on-line computing model.Vacuum degree on-line computing model comprises the components and parts such as precision resistance, NPO level electric capacity, operational amplifier, microwave directional transmissions chip, AD converter, dsp chip.
The utility model Vacuity of Vacuum Circuit Breakers on-line monitoring system is in concrete use procedure: the metal guide rod of vacuum circuit-breaker and be equivalent to a capacitor between contact and radome, and the radome of vacuum circuit-breaker is also equivalent to a capacitor over the ground.When arc control device vacuum degree is normal, in the energized state, the electric charge of radome accumulation makes the current potential on radome higher, the highest can close to the peak value of supply voltage, and more stable.
When vacuum degree reduces, gas density in arc control device becomes large, the rising of internal gas pressure will cause gas molecule, metallic etc. to increase, thus cause insulation characterisitic to decline, prebreakdown voltage reduces, and the probability that prebreakdown occurs increases, and produces ionic discharge, cause Shielding tensor to decline, and vacuum circuit-breaker fringing field intensity is changed.When internal gas pressure initial change, electric field change is not clearly, but fairly obvious to electric field change during certain value.When internal gas pressure raises further, metal guide rod and contact mainly through gaseous conductor to radome discharge and recharge, because radome electric capacity is over the ground very little, a small amount of electric charge accumulation significantly can change the electric field strength of proximate contacts, can form corona at the edge of contact.Additional specific microwave signal, Development pattern changes by the feedback signal on radome, detects this specific feedback signal, just can reflect internal gas pressure situation.
The above; be only the utility model preferably embodiment; protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses, the simple change of the technical scheme that can obtain apparently or equivalence are replaced and are all fallen in protection range of the present utility model.
Claims (2)
1. a Vacuity of Vacuum Circuit Breakers on-line monitoring system, is characterized in that, is made up of 3 transducers and a vacuum degree on-line computing model.
2. Vacuity of Vacuum Circuit Breakers on-line monitoring system according to claim 1, is characterized in that, described vacuum degree on-line computing model comprises precision resistance, NPO level electric capacity, operational amplifier, microwave directional transmissions chip, AD converter, dsp chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838017.XU CN204348608U (en) | 2014-12-25 | 2014-12-25 | A kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838017.XU CN204348608U (en) | 2014-12-25 | 2014-12-25 | A kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204348608U true CN204348608U (en) | 2015-05-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420838017.XU Expired - Fee Related CN204348608U (en) | 2014-12-25 | 2014-12-25 | A kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204348608U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105719900A (en) * | 2016-04-01 | 2016-06-29 | 三峡大学 | Microwave vacuum breaker vacuum degree pre-warning device |
-
2014
- 2014-12-25 CN CN201420838017.XU patent/CN204348608U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105719900A (en) * | 2016-04-01 | 2016-06-29 | 三峡大学 | Microwave vacuum breaker vacuum degree pre-warning device |
| CN105719900B (en) * | 2016-04-01 | 2017-12-22 | 三峡大学 | A kind of Vacuity of Vacuum Circuit Breakers prior-warning device of microwave |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150520 Termination date: 20151225 |
|
| EXPY | Termination of patent right or utility model |