CN104502817A - Wireless ultrahigh frequency sensor for local discharge detection under impulse voltage - Google Patents
Wireless ultrahigh frequency sensor for local discharge detection under impulse voltage Download PDFInfo
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- CN104502817A CN104502817A CN201410797615.1A CN201410797615A CN104502817A CN 104502817 A CN104502817 A CN 104502817A CN 201410797615 A CN201410797615 A CN 201410797615A CN 104502817 A CN104502817 A CN 104502817A
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Abstract
The invention discloses a wireless ultrahigh frequency sensor for local discharge detection under impulse voltage. The wireless ultrahigh frequency sensor comprises a signal processor, and a synchronous acquisition trigger antenna, a local discharge ultrahigh frequency detecting antenna and a wireless signal transmitting antenna which are electrically connected with the signal processor, wherein the synchronous acquisition trigger antenna receives a high frequency pulse signal which is generated when an impulse voltage generator generates an impulse voltage sphere gap action; the pulse signal triggers the local discharge ultrahigh frequency detecting antenna to receive a local discharge ultrahigh frequency signal generated in a combined electric appliance under the impulse voltage; after being digitalized by the signal processor, the local discharge ultrahigh frequency signal is wirelessly transmitted by the wireless signal transmitting antenna. According to the sensor provided by the embodiment of the invention, detection on local discharge under the impulse voltage is performed by using the ultrahigh frequency signal, so that the high anti-interference ability of the ultrahigh frequency signal can be effectively used; a wireless transmission form is adopted, so that wiring workload in a field is greatly reduced, and the field working efficiency and the detection accuracy degree are improved.
Description
Technical field
The present invention relates to local discharge of electrical equipment experimental technique field, particularly the wireless superfrequency sensor of Partial Discharge Detection under a kind of surge voltage.
Background technology
Closed gas insulation in combined electric appliance (Gas Insulated Switchgear, GIS) is widely used in electrical network because it has little, the good insulating property of floor area.But due to its totally enclosed design feature, once there is accident, the consequence score caused is much serious from opening-type equipment, and its fault restoration is particularly complicated.
Shelf depreciation is considered to the omen of insulation fault usually, and the appearance of shelf depreciation often illustrates that combined electrical apparatus exists the defect of installation, manufacture, even design aspect.The inner shelf depreciation sustainable development of combined electrical apparatus easily causes Fault of Insulating Breakdown, thus there is power outage, cause damage to national economy, just seem particularly important so detect the shelf depreciation of combined electrical apparatus, Partial Discharge Detection for combined electrical apparatus insulation fault discovery early and process significant.
Scene is carried out combined electrical apparatus impulse voltage test and is obtained application at home, and the measurement carrying out shelf depreciation while carrying out impulse voltage test is significant for the detection of tiny flaw in combined electrical apparatus.Under surge voltage, the detection of shelf depreciation at present more adopts pulse current method, the detection of Partial discharge signal is carried out by being socketed High Frequency Current Sensor on ground wire, but interference free performance is poor when pulse current method is applied at the scene, is often subject to on-the-spot a large amount of interference and signal accurately cannot be obtained.
Summary of the invention
Based on this, the object of the present invention is to provide the wireless superfrequency sensor of Partial Discharge Detection under a kind of surge voltage, Partial Discharge Detection can be carried out under the on-the-spot surge voltage of combined electrical apparatus, improve the order of accuarcy of Partial Discharge Detection under surge voltage.
For achieving the above object, the embodiment of the present invention by the following technical solutions:
The wireless superfrequency sensor of Partial Discharge Detection under a kind of surge voltage, comprise: signal processor and the synchronous acquisition trigger antenna be electrically connected with described signal processor, partial-discharge ultrahigh-frequency detects antenna, wireless signal transmission antenna, described synchronous acquisition trigger antenna receives high-frequency pulse signal during impulse voltage generator generation surge voltage ball gap action, this pulse signal detects the synchronous acquisition signal of antenna as described partial-discharge ultrahigh-frequency, trigger described partial-discharge ultrahigh-frequency and detect the sensing that antenna carries out signal, the partial-discharge ultrahigh-frequency signal that under described partial-discharge ultrahigh-frequency detection antenna reception surge voltage, combined electrical apparatus inside produces, this partial-discharge ultrahigh-frequency signal carries out carrying out wireless transmit by described wireless signal transmission antenna after digitized processing through described signal processor.
Based on the wireless superfrequency sensor of Partial Discharge Detection under the surge voltage of the embodiment of the present invention, be provided with synchronous acquisition trigger antenna, partial-discharge ultrahigh-frequency detects antenna, wireless signal transmission antenna, the pulse signal that during synchronous acquisition trigger antenna reception impulse voltage generator generation surge voltage, the action of ball gap goes out to space radiation, this pulse signal detects the synchronous acquisition signal of antenna as partial-discharge ultrahigh-frequency, the partial-discharge ultrahigh-frequency signal that under partial-discharge ultrahigh-frequency detection antenna reception surge voltage, combined electrical apparatus inside produces, partial-discharge ultrahigh-frequency signal after signal processor digitizing is carried out wireless transmit by wireless signal transmission antenna, it utilizes ultrahigh-frequency signal to carry out the detection of shelf depreciation under surge voltage, effectively can utilize the strong anti-interference performance of ultrahigh-frequency signal, and adopt the form of wireless transmission, substantially reduce on-the-spot installation work amount, improve the order of accuarcy of work on the spot efficiency and detection.
Accompanying drawing explanation
Fig. 1 is the Partial Discharge Detection structural representation of wireless superfrequency sensor embodiment under surge voltage of the present invention;
Fig. 2 is the structural representation of signal processor in a concrete example.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that embodiment described herein only in order to explain the present invention, do not limit protection scope of the present invention.
The structural representation of the wireless superfrequency sensor embodiment of Partial Discharge Detection under surge voltage of the present invention has been shown in Fig. 1.As shown in Figure 1, the sensor in the present embodiment includes: synchronous acquisition trigger antenna 1, partial-discharge ultrahigh-frequency detect antenna 2, wireless signal transmission antenna 3, signal processor 5.
As shown in Figure 1, during work, synchronous acquisition trigger antenna 1 receives high-frequency pulse signal during impulse voltage generator generation surge voltage ball gap action, this pulse signal detects the synchronous acquisition signal of antenna 2 as partial-discharge ultrahigh-frequency, trigger partial-discharge ultrahigh-frequency and detect the sensing that antenna 2 carries out signal, partial-discharge ultrahigh-frequency detects antenna 2 and receives the partial-discharge ultrahigh-frequency signal that combined electrical apparatus inside produces under surge voltage, and this partial-discharge ultrahigh-frequency signal is gone out by wireless signal transmission antenna 3 wireless transmit after signal processor 5 carries out digitized processing.
Thus ultrahigh-frequency signal can be utilized accordingly to carry out the detection of shelf depreciation under surge voltage, effectively can utilize the strong anti-interference performance of ultrahigh-frequency signal, and adopt the form of wireless transmission, substantially reduce on-the-spot installation work amount, improve the order of accuarcy of work on the spot efficiency and detection.
As shown in Figure 1, in the sensor that this embodiment provides, metal shell 6 can also be included, signal processor 5 is arranged in metal shell 6, synchronous acquisition trigger antenna 1 is arranged on the side on metal shell 6 surface, wireless signal transmission antenna 3 is arranged on the opposite side on the above-mentioned surface of metal shell 6, partial-discharge ultrahigh-frequency detects the inside surface that antenna 2 is arranged on the opposite face on the above-mentioned surface of metal shell 6, and synchronous acquisition trigger antenna 1, partial-discharge ultrahigh-frequency detect antenna 2, wireless signal transmission antenna 3 is electrically connected with signal processor 5.Wherein, synchronous acquisition trigger antenna 1, wireless signal transmission antenna 3 can be arranged in the mode running through metal shell 6, and partial-discharge ultrahigh-frequency detects antenna 2 and can be arranged on metal shell inside, arrange in the mode being close to metal shell 6 inside surface.And under this surge voltage, the wireless superfrequency sensor of Partial Discharge Detection can be the integrated design, to make more compact structure.
The example of the sensor shown in composition graphs 1, when combined electrical apparatus impulse voltage test is carried out at scene, Partial Discharge Detection under surge voltage of the present invention is detected antenna 2 side with the partial-discharge ultrahigh-frequency of wireless superfrequency sensor to be close on combined electrical apparatus disc insulator, carries out the measurement of local discharge signal under surge voltage.When impulse voltage generator produces surge voltage, the ball gap meeting action of generator, to whole space radiation high-frequency pulse signal, detect the synchronous acquisition signal (trigger pip) of antenna 2 as partial-discharge ultrahigh-frequency after synchronous acquisition trigger antenna 1 receives this pulse signal, trigger partial-discharge ultrahigh-frequency and detect the sensing that antenna 2 carries out signal, partial-discharge ultrahigh-frequency detects antenna 2 and receives the partial-discharge ultrahigh-frequency signal that combined electrical apparatus inside produces under surge voltage, this partial-discharge ultrahigh-frequency signal carries out digitized processing through signal processor 5, partial-discharge ultrahigh-frequency signal after signal processor 5 digitizing is carried out wireless transmit by wireless signal transmission antenna 3.From but separately adopt two antennas, the partial-discharge ultrahigh-frequency signal (being received by partial-discharge ultrahigh-frequency detection antenna 2) that under the pulse information (being received by synchronous acquisition trigger antenna 1) that when receiving surge voltage respectively, the action of ball gap goes out to space radiation and surge voltage, combined electrical apparatus inside produces.
As shown in Figure 1, sensor in the present embodiment can also include more than one epoxy insulation 4, synchronous acquisition trigger antenna 1, partial-discharge ultrahigh-frequency detect antenna 2, wireless signal transmission antenna 3 is insulated by epoxy insulation 4 with metal shell 6, to improve insulating property.
Wherein, when adopting the sensor of multiple embodiment of the present invention to measure simultaneously, the sensor that the above-mentioned pulse signal that synchronous acquisition trigger antenna 1 receives can also trigger multiple embodiment of the present invention as synchronizing signal simultaneously carries out the sensing of partial-discharge ultrahigh-frequency signal.Wherein, partial-discharge ultrahigh-frequency in the embodiment of the present invention detects antenna 2 can adopt miniaturization double helix Archimedes antenna, bandwidth can be designed to 300MHz (megahertz) ~ 3GHz (GHz), and the signal that partial-discharge ultrahigh-frequency detection antenna 2 measures is sent into signal processor 5 and carried out digitized processing.The mode that signal processor 5 pairs of partial-discharge ultrahigh-frequency signals carry out digitized processing can adopt existing mode in prior art to carry out.
The structural representation of the signal processor 5 in a concrete example has been shown in Fig. 2.As shown in Figure 2, in this example, this signal processor 5 includes Signal-regulated kinase 51, signal acquisition module 52, signal storage module 53, signal emission module 54, also include powered battery module 50, battery-powered module 50 is Signal-regulated kinase 51, signal acquisition module 52, signal storage module 53, signal emission module 54 provide power supply supply.
Wherein, Signal-regulated kinase 51, the partial-discharge ultrahigh-frequency signal detected for detecting antenna 2 to partial-discharge ultrahigh-frequency gets envelope process, obtains the local discharge signal after frequency reducing;
Signal acquisition module 52, for gathering the local discharge signal after frequency reducing, and by the signal storage that collects to signal storage module 53;
Signal emission module 54, for reading signal from signal storage module 53, and is launched this signal by wireless signal transmission antenna 3.
During work, the partial-discharge ultrahigh-frequency signal that Signal-regulated kinase 51 pairs of partial-discharge ultrahigh-frequencies detection antennas 2 detect is nursed one's health, envelope process is got to partial-discharge ultrahigh-frequency signal, obtain the local discharge signal after frequency reducing, local discharge signal after signal acquisition module 52 pairs of frequency reducings gathers, the sampling rate of 100MHz can be adopted to gather, and by the signal storage that collects to signal storage module 53, the signal that signal storage module 53 stores by signal emission module 54 is launched by wireless signal transmission antenna 3.The receiver of far-end further can be analyzed this signal after receiving the signal that wireless signal transmission antenna 3 sends.In embodiments of the present invention, signal emission module 54 can adopt conventional wireless module to realize, and transmitting boundary can be greater than 20 meters.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the wireless superfrequency sensor of Partial Discharge Detection under a surge voltage, it is characterized in that, comprise: signal processor and the synchronous acquisition trigger antenna be electrically connected with described signal processor, partial-discharge ultrahigh-frequency detects antenna, wireless signal transmission antenna, described synchronous acquisition trigger antenna receives high-frequency pulse signal during impulse voltage generator generation surge voltage ball gap action, this pulse signal detects the synchronous acquisition signal of antenna as described partial-discharge ultrahigh-frequency, trigger described partial-discharge ultrahigh-frequency and detect the sensing that antenna carries out signal, the partial-discharge ultrahigh-frequency signal that under described partial-discharge ultrahigh-frequency detection antenna reception surge voltage, combined electrical apparatus inside produces, this partial-discharge ultrahigh-frequency signal carries out carrying out wireless transmit by described wireless signal transmission antenna after digitized processing through described signal processor.
2. the wireless superfrequency sensor of Partial Discharge Detection under surge voltage according to claim 1, it is characterized in that, also comprise metal shell, described signal processor is arranged in described metal shell, described synchronous acquisition trigger antenna is arranged on the side of described metal shell surface, described wireless signal transmission antenna is arranged on the opposite side on the described surface of described metal shell, and described partial-discharge ultrahigh-frequency detects the inside surface that antenna is arranged on the opposite face on the described surface of described metal shell.
3. the wireless superfrequency sensor of Partial Discharge Detection under surge voltage according to claim 2, it is characterized in that, also comprise epoxy insulation, described synchronous acquisition trigger antenna, described partial-discharge ultrahigh-frequency are detected antenna, described wireless signal transmission antenna and described metal shell and are insulated by epoxy insulation.
4. under the surge voltage according to claim 1 or 2 or 3, the wireless superfrequency sensor of Partial Discharge Detection, is characterized in that, it is miniaturization double helix Archimedes antenna that described partial-discharge ultrahigh-frequency detects antenna.
5. the wireless superfrequency sensor of Partial Discharge Detection under surge voltage according to claim 4, is characterized in that, the bandwidth of described miniaturization double helix Archimedes antenna is 300MHz ~ 3GHz.
6. under the surge voltage according to Claims 2 or 3, the wireless superfrequency sensor of Partial Discharge Detection, is characterized in that, described synchronous acquisition trigger antenna, described wireless signal transmission antenna run through described metal shell and arrange.
7. under the surge voltage according to claim 1 or 2 or 3, the wireless superfrequency sensor of Partial Discharge Detection, is characterized in that, under described surge voltage, the wireless superfrequency sensor of Partial Discharge Detection is the integrated design.
8. under the surge voltage according to claim 1 or 2 or 3, the wireless superfrequency sensor of Partial Discharge Detection, is characterized in that, described signal processor comprises Signal-regulated kinase, signal acquisition module, signal storage module, signal emission module:
Described Signal-regulated kinase, for described partial-discharge ultrahigh-frequency is detected antenna detection to partial-discharge ultrahigh-frequency signal get envelope process, obtain the local discharge signal after frequency reducing;
Described signal acquisition module, for gathering the local discharge signal after described frequency reducing, and by the signal storage that collects to described signal storage module;
Described signal emission module, for reading signal from described signal storage module, and is gone out this signal by described wireless signal transmission antenna transmission.
9. the wireless superfrequency sensor of Partial Discharge Detection under surge voltage according to claim 8, it is characterized in that, described signal processor also comprises powered battery module, and described powered battery module is described Signal-regulated kinase, signal acquisition module, signal storage module, signal emission module provide power supply supply.
10. the wireless superfrequency sensor of Partial Discharge Detection under surge voltage according to claim 8, is characterized in that, the sampling rate of described signal acquisition module is 100Mhz.
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| CN201410797615.1A CN104502817A (en) | 2014-12-17 | 2014-12-17 | Wireless ultrahigh frequency sensor for local discharge detection under impulse voltage |
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Cited By (8)
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| CN105548776A (en) * | 2016-01-27 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | System and method for radio frequency detection and antenna detection for electric power |
| CN105606971A (en) * | 2016-02-24 | 2016-05-25 | 国网江西省电力科学研究院 | Intelligent ultrahigh frequency sensor for electrical equipment partial discharge detection |
| CN106054046A (en) * | 2016-08-17 | 2016-10-26 | 国家电网公司 | GIS ultrahigh frequency partial discharge online monitoring system |
| CN106249118A (en) * | 2016-09-20 | 2016-12-21 | 国网天津市电力公司 | Based on GIS device superfrequency partial discharge detecting system under surge voltage |
| CN108710073A (en) * | 2018-07-25 | 2018-10-26 | 国网青海省电力公司电力科学研究院 | Partial discharge test system under the combination of gases electric appliance surge voltage of T-type structure |
| CN109270417A (en) * | 2018-10-31 | 2019-01-25 | 江苏骏龙光电科技股份有限公司 | A kind of extra-high video sensor of the GIS partial discharge on-line checking of wireless transmission |
| CN111175616A (en) * | 2019-12-25 | 2020-05-19 | 南京悠阔电气科技有限公司 | Method for detecting partial discharge of switch cabinet by using robot |
| CN111273142A (en) * | 2020-03-19 | 2020-06-12 | 上海电力大学 | Transformer partial discharge detection system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105548776A (en) * | 2016-01-27 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | System and method for radio frequency detection and antenna detection for electric power |
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| CN106249118A (en) * | 2016-09-20 | 2016-12-21 | 国网天津市电力公司 | Based on GIS device superfrequency partial discharge detecting system under surge voltage |
| CN108710073A (en) * | 2018-07-25 | 2018-10-26 | 国网青海省电力公司电力科学研究院 | Partial discharge test system under the combination of gases electric appliance surge voltage of T-type structure |
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| CN111175616A (en) * | 2019-12-25 | 2020-05-19 | 南京悠阔电气科技有限公司 | Method for detecting partial discharge of switch cabinet by using robot |
| CN111273142A (en) * | 2020-03-19 | 2020-06-12 | 上海电力大学 | Transformer partial discharge detection system |
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