CN205067687U - Circuit breaker arc extinguishing characteristic detects and evaluation device - Google Patents
Circuit breaker arc extinguishing characteristic detects and evaluation device Download PDFInfo
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- CN205067687U CN205067687U CN201520739635.3U CN201520739635U CN205067687U CN 205067687 U CN205067687 U CN 205067687U CN 201520739635 U CN201520739635 U CN 201520739635U CN 205067687 U CN205067687 U CN 205067687U
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Abstract
The utility model discloses a circuit breaker arc extinguishing characteristic detects and evaluation device, gather the treater including radio -frequency antenna, signal conditioning ware, high -speed signal, the radio -frequency antenna with signal conditioning ware electricity is connected, the signal conditioning ware with high -speed signal gathers the treater electricity and connects. The beneficial effect of the utility model: the electromagnetic wave signal that the switching arc produced when detecting breaker open operation through the adoption radio -frequency antenna combines signal conditioning ware and signal acquisition and processing ware to realize the electrified measuring and aassessment of circuit breaker arc extinguishing characteristic, detects to need not to have a power failure, can go on on line, and antenna and circuit breaker do not have direct contact within a definite time, do not need the sensor installation, detect convenient and fast, can realize the measuring of arc extinguishing characteristic sudden change.
Description
Technical field
The utility model relates to field of power transformation, specifically, relates to a kind of breaker arc extinguishing Characteristics Detection and apparatus for evaluating.
Background technology
Isolating switch is the power equipment that in electrical network, quantity is the hugest, plays a part control and protection, once break down, not only directly can cause power grid accident, also can cause the expansion of existing accident, bring huge negative effect to national economy and social stability.Conventionally, the fault of isolating switch is based on mechanical fault, and its detection is also detected as master with mechanical property, lacks research to the detection of its arc quenching characteristic.
Can be electric life method for the detection method adopted at present, the method need install current sensor additional on-board the circuit breaker, detect the effective value of dropout current, be weighted the accumulative rear electric life calculating isolating switch with open and close times, thus indirectly test and assessment carried out to its arc quenching characteristic.But electric life method can only reflect the general morphologictrend of breaker arc extinguishing characteristic, the breaker arc extinguishing characteristic of sudden change cannot be reflected.A lot of isolating switch had occurred in electric system can not the accident that causes of arc extinguishing, and its action frequency is far below ratings.
For the problem in correlation technique, at present effective solution is not yet proposed.
Utility model content
For the above-mentioned technical matters in correlation technique, the utility model proposes a kind of breaker arc extinguishing Characteristics Detection and apparatus for evaluating, live detection and the assessment of breaker arc extinguishing characteristic can be realized.
For realizing above-mentioned technical purpose, the technical solution of the utility model is achieved in that
A kind of breaker arc extinguishing Characteristics Detection and apparatus for evaluating, comprise radio-frequency antenna, signal conditioner, high-speed signal acquisition processor;
Described radio-frequency antenna is electrically connected with described signal conditioner, and described signal conditioner is electrically connected with described high-speed signal acquisition processor.
Further, described radio-frequency antenna adopts planar equiangular spiral antenna.
Further, described radio-frequency antenna is positioned over the mesophase spherule of isolating switch.
Further, the working band of described radio-frequency antenna is between 500MHz-2GHz.
Further, the cutoff frequency of described signal conditioner is between 500MHz-2GHz, and the undesired signal gain that can exist in filtering transformer station in this frequency band is more than or equal to 20dB.
Further, the power amplifier cutoff frequency of described signal conditioner is between 1GHz-2GHz, and the gain of this inband signal conditioner is 20dB.
Further, the sampling rate of described signal acquisition process device is more than or equal to 1MS/s.
Further, described undesired signal comprises corona.
The beneficial effects of the utility model: the electromagnetic wave signal produced by switching arc during employing radio-frequency antenna detection breaker open operation, binding signal conditioner and signal acquisition process device achieve live detection and the assessment of breaker arc extinguishing characteristic, detect without the need to having a power failure, can carry out online, without directly contacting between antenna with isolating switch, do not need sensor installation, fast easy to detect, the detection of arc quenching characteristic sudden change can be realized.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is breaker arc extinguishing Characteristics Detection according to the utility model embodiment and apparatus for evaluating module map;
Fig. 2 is that the radio-frequency antenna according to the utility model embodiment arranges schematic diagram.
In figure:
1, radio-frequency antenna; 2, signal conditioner; 3, high-speed signal acquisition processor; 4, isolating switch.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain, all belongs to the scope of the utility model protection.
As shown in Figure 1-2, a kind of breaker arc extinguishing Characteristics Detection according to the utility model embodiment and apparatus for evaluating, comprise radio-frequency antenna 1, signal conditioner 2, high-speed signal acquisition processor 3;
Described radio-frequency antenna 1 is electrically connected with described signal conditioner 2, and described signal conditioner 2 is electrically connected with described high-speed signal acquisition processor 3.
In one embodiment, described radio-frequency antenna 1 adopts planar equiangular spiral antenna.
In one embodiment, described radio-frequency antenna 1 is positioned over the mesophase spherule of isolating switch 4.
In one embodiment, the working band of described radio-frequency antenna 1 is between 500MHz-2GHz.
In one embodiment, the cutoff frequency of described signal conditioner 2 is between 500MHz-2GHz, and the undesired signal gain that can exist in filtering transformer station in this frequency band is more than or equal to 20dB.
In one embodiment, the power amplifier cutoff frequency of described signal conditioner 2 is between 1GHz-2GHz, and the gain of this inband signal conditioner 2 is 20dB.
In one embodiment, the sampling rate of described signal acquisition process device 2 is more than or equal to 1MS/s.
In one embodiment, described undesired signal comprises corona.
Conveniently understand technique scheme of the present utility model, below by way of in concrete use-pattern, technique scheme of the present utility model is described in detail.
When specifically using, according to breaker arc extinguishing Characteristics Detection described in the utility model and apparatus for evaluating:
First receive by the radio-frequency antenna of optimal design the electromagnetic wave signal produced from switching arc during breaker open operation, secondly the signal that radio frequency antenna exports carries out filtering and amplification, again adopt signals collecting and processor collection, analytic signal, and calculating quantity and the duration of electromagnetic wave signal, the quantity and the arc quenching characteristic of duration to isolating switch that finally contrast same model isolating switch generation magnetostatic wave signal are assessed.
Its principle of work is: isolating switch can produce switching arc when separating brake, then inspires radio-frequency electromagnetic wave direction surrounding and propagates, arrange that antenna can receive this radio frequency electromagnetic signal around isolating switch.When switch arc extinction performance is good, electric arc is extinguished rapidly, and the electromagnetic wave quantity that it inspires is few, and the duration is short; And when breaker arc extinguishing performance is not enough, its arc extinguishing speed declines, electric arc continues long, multiple electromagnetic wave signal can be excited in interrupting process, duration extension, therefore carries out test and assessment by the quantity of electromagnetic wave signal of testing in interrupting process and duration to the arc quenching characteristic of switch.
By utilize radio-frequency antenna receive breaker open operation time switching arc produce electromagnetic wave signal, without contacting directly between measurement mechanism and isolating switch, more without the need to wiring, conveniently can realize live detection and the assessment of breaker arc extinguishing characteristic, the catastrophe of breaker arc extinguishing performance can be reflected simultaneously.
Wherein, radio-frequency antenna 1, for during breaker open operation switching arc produce electromagnetic wave signal, convert thereof into as voltage signal and flowed to signal conditioner 2.The working band of radio-frequency antenna 1, at 500MHz-2GHz, can avoid the interference such as the corona of transformer station.In testing process, the center line of radio-frequency antenna 1 is aimed at isolating switch mesophase spherule.
Signal conditioner 2, for eliminating the Electromagnetic Interference signal that radio-frequency antenna 1 in transformer station receives, the electromagnetic wave signal that during amplification breaker open operation, switching arc produces simultaneously, improves signal to noise ratio (S/N ratio), and radio frequency signal carries out envelope detection, to reduce the requirement to signal acquisition process device 3.The undesired signals such as the lower-cut-off frequency of signal conditioner 2 is not less than 500MHz, reaches the standard grade cutoff frequency not higher than 2GHz, the corona adopting this frequency band can exist in filtering transformer station, the gain in this frequency band is for being not less than 20dB.The lower-cut-off frequency of the power amplifier in described signal conditioner 2 is 1GHz, and upper cut-off frequency is 2GHz, and the gain in this frequency band is 20dB.The envelope detection duration is not less than 150 μ S.
High-speed signal acquisition processor 3, the analog to digital conversion of electromagnetic wave signal envelope detection that during for realizing breaker open operation, switching arc produces, the storage of digital signal and the quantity of display and electromagnetic wave signal and the calculating of duration.
In sum, by means of technique scheme of the present utility model, by the electromagnetic wave signal that switching arc during employing radio-frequency antenna detection breaker open operation produces, binding signal conditioner and signal acquisition process device achieve live detection and the assessment of breaker arc extinguishing characteristic, detecting without the need to having a power failure, can carry out online, without directly contacting between antenna with isolating switch, do not need sensor installation, fast easy to detect, the detection of arc quenching characteristic sudden change can be realized.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. breaker arc extinguishing Characteristics Detection and an apparatus for evaluating, is characterized in that, comprises radio-frequency antenna (1), signal conditioner (2), high-speed signal acquisition processor (3);
Described radio-frequency antenna (1) is electrically connected with described signal conditioner (2), and described signal conditioner (2) is electrically connected with described high-speed signal acquisition processor (3).
2. breaker arc extinguishing Characteristics Detection according to claim 1 and apparatus for evaluating, is characterized in that, described radio-frequency antenna (1) adopts planar equiangular spiral antenna.
3. breaker arc extinguishing Characteristics Detection according to claim 1 and apparatus for evaluating, is characterized in that, described radio-frequency antenna (1) is positioned over the mesophase spherule of isolating switch (4).
4. breaker arc extinguishing Characteristics Detection according to claim 1 and apparatus for evaluating, is characterized in that, the working band of described radio-frequency antenna (1) is between 500MHz-2GHz.
5. breaker arc extinguishing Characteristics Detection according to claim 1 and apparatus for evaluating, it is characterized in that, the cutoff frequency of described signal conditioner (2) is between 500MHz-2GHz, and the undesired signal gain that can exist in filtering transformer station in this frequency band is more than or equal to 20dB.
6. breaker arc extinguishing Characteristics Detection according to claim 1 and apparatus for evaluating, is characterized in that, the power amplifier cutoff frequency of described signal conditioner (2) is between 1GHz-2GHz, and the gain of this inband signal conditioner (2) is 20dB.
7. breaker arc extinguishing Characteristics Detection according to claim 1 and apparatus for evaluating, is characterized in that, the sampling rate of described signal acquisition process device (2) is more than or equal to 1MS/s.
8. breaker arc extinguishing Characteristics Detection according to claim 5 and apparatus for evaluating, is characterized in that, described undesired signal comprises corona.
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| CN201520739635.3U CN205067687U (en) | 2015-09-22 | 2015-09-22 | Circuit breaker arc extinguishing characteristic detects and evaluation device |
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| CN201520739635.3U CN205067687U (en) | 2015-09-22 | 2015-09-22 | Circuit breaker arc extinguishing characteristic detects and evaluation device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680701A (en) * | 2016-11-25 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Circuit breaker re-ignition phenomenon detection device and method |
| CN106772019A (en) * | 2017-02-10 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | The separate detecting system of three-phase breaker electromagnetic wave signal and method |
| CN106842013A (en) * | 2017-02-10 | 2017-06-13 | 云南电网有限责任公司电力科学研究院 | The live detection method and device of the contact of breaker ablation degree based on electromagnetic wave |
| CN106842012A (en) * | 2017-02-10 | 2017-06-13 | 云南电网有限责任公司电力科学研究院 | A kind of separate decision method of live detection |
| CN107132475A (en) * | 2017-06-12 | 2017-09-05 | 华北电力大学 | A kind of breaker arc extinguishing performance anti interference detection method and device based on vibration signal |
| CN107942242A (en) * | 2017-10-22 | 2018-04-20 | 国网山西省电力公司电力科学研究院 | High-voltage AC breaker Characteristics Detection evaluation method based on arc extinguishing electromagnetic waveforms |
| CN110346715A (en) * | 2019-08-22 | 2019-10-18 | 云南电网有限责任公司电力科学研究院 | A kind of breaker arc extinguishing method for testing performance |
| CN111142017A (en) * | 2020-01-03 | 2020-05-12 | 国网江苏省电力有限公司检修分公司 | Breaker state diagnosis system and method |
| CN111474185A (en) * | 2020-05-11 | 2020-07-31 | 国家电网有限公司 | Contact ablation degree judgment method based on circuit breaker radiation electromagnetic wave signal detection |
| CN111679181A (en) * | 2020-06-19 | 2020-09-18 | 国网陕西省电力公司电力科学研究院 | Live detection method and device for ablation of high-voltage reactive switching switch contact |
-
2015
- 2015-09-22 CN CN201520739635.3U patent/CN205067687U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680701A (en) * | 2016-11-25 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Circuit breaker re-ignition phenomenon detection device and method |
| CN106772019A (en) * | 2017-02-10 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | The separate detecting system of three-phase breaker electromagnetic wave signal and method |
| CN106842013A (en) * | 2017-02-10 | 2017-06-13 | 云南电网有限责任公司电力科学研究院 | The live detection method and device of the contact of breaker ablation degree based on electromagnetic wave |
| CN106842012A (en) * | 2017-02-10 | 2017-06-13 | 云南电网有限责任公司电力科学研究院 | A kind of separate decision method of live detection |
| CN107132475A (en) * | 2017-06-12 | 2017-09-05 | 华北电力大学 | A kind of breaker arc extinguishing performance anti interference detection method and device based on vibration signal |
| CN107942242A (en) * | 2017-10-22 | 2018-04-20 | 国网山西省电力公司电力科学研究院 | High-voltage AC breaker Characteristics Detection evaluation method based on arc extinguishing electromagnetic waveforms |
| CN110346715A (en) * | 2019-08-22 | 2019-10-18 | 云南电网有限责任公司电力科学研究院 | A kind of breaker arc extinguishing method for testing performance |
| CN111142017A (en) * | 2020-01-03 | 2020-05-12 | 国网江苏省电力有限公司检修分公司 | Breaker state diagnosis system and method |
| CN111474185A (en) * | 2020-05-11 | 2020-07-31 | 国家电网有限公司 | Contact ablation degree judgment method based on circuit breaker radiation electromagnetic wave signal detection |
| CN111679181A (en) * | 2020-06-19 | 2020-09-18 | 国网陕西省电力公司电力科学研究院 | Live detection method and device for ablation of high-voltage reactive switching switch contact |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20160922 |