CN205229388U - Ultraviolet impulse method detecting system discharges in high -voltage electrical equipment outside - Google Patents
Ultraviolet impulse method detecting system discharges in high -voltage electrical equipment outside Download PDFInfo
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- CN205229388U CN205229388U CN201520894408.8U CN201520894408U CN205229388U CN 205229388 U CN205229388 U CN 205229388U CN 201520894408 U CN201520894408 U CN 201520894408U CN 205229388 U CN205229388 U CN 205229388U
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Abstract
The utility model discloses an ultraviolet impulse method detecting system discharges in high -voltage electrical equipment outside, including discharging positioner, light - electric converting circuit, high pressure and power supply circuit, IU converting circuit, filter, pulse signal amplifier circuit and data acquisition circuit, filter set up positioner's the front end that discharges positioner's output and light - electric converting circuit's the input electricity of discharging is connected, high pressure and power supply circuit's output is connected with light - electric converting circuit's input electricity, light - electric converting circuit's output is connected with IU converting circuit's input electricity, IU converting circuit's output is connected with pulse signal amplifier circuit's input electricity, pulse signal amplifier circuit's output is connected with the input of data acquisition circuit electricity. In order to realize advantage low -cost and high sensitivity.
Description
Technical field
The utility model relates to electric power monitoring field, particularly, relates to a kind of high voltage electric equipment external discharge UV pulse method detection system.
Background technology
Along with the continuous expansion of electrical network scale, the improving constantly of electrical load requirements, damage, the fault of the various types of high-tension apparatuses used in electric system also constantly increase, and correspondingly, also improve constantly the requirement of preventive maintenance.Transmission line of electricity and Substation Electric Equipment work under atmospheric environment.In some cases, along with the appearance of the reduction fault of construction of insulating property. corona discharge and surperficial partial discharge phenomenon can be produced.Corona discharge detection is carried out to electrical equipment, the deterioration condition insulating and may occur can be grasped in time. before major accident occurs, just can determine the unsafe condition insulated.Thus avoid the generation of accident: adopt UV pulse method to detect high voltage electric equipment electric discharge realization that is intelligent for fault diagnosis and Electrical Equipment Maintenance Based on State and have great importance.In electrical equipment discharge process, corona and discharge part position, local are by a large amount of ultraviolet of external radiation. and the generation of corona discharge and shelf depreciation and enhancing so just can be utilized to carry out the insulation status of indirect assessment operational outfit, the defect of Timeliness coverage insulator arrangement, UV pulse method service technique is compared with traditional detection methods such as infrared detection with ultrasound examination in electric system. and UV pulse method detection technique has the advantage of many uniquenesses.
The characteristic quantity that can be used for implementing high voltage electric equipment state-detection mainly contains pulse current, insulator voltage, Electric Field Distribution, CHARGE DISTRIBUTION, sound and ultrasound wave, light (containing infrared ray, ultraviolet) etc., is wherein applied on ultraviolet imager at present based on ultraviolet detection.
The ultraviolet imager promoted gradually at present, compared with other detection meanss, has and observe the advantages such as directly perceived, foresight is good, observed range is far away, but this remains a kind of non-online manual detection means, cannot accomplish the automatic monitoring to power equipment all fronts discharge scenario.Meanwhile, because ultraviolet imager is expensive, be difficult to be structured in line monitoring system.
Utilize ultraviolet light transducer to form detection system, be all widely used in fire report, river improvement, earthquake prediction, weather forecast, ocean environment monitoring etc.According to pine (HAMAMATSU) company introduction of Japanese shore, ultraviolet light sensing tube also can be used for the detection of line of electric force corona discharge.But the report that China carries out the aspect research of power equipment on-line ultraviolet detection system is considerably less, University Of Chongqing and Tsing-Hua University do preliminary must to study in this regard, UV pulse method detection system directly can add up the discharge pulse number of equipment, has more quicklook, the better feature of predictability; Have than leakage current detection method do not contact, do not affect by high frequency interference, feature that sensitivity is higher, compared with ultraviolet image method, the advantage such as this method has low cost, high sensitivity, on-line checkingi, can give warning in advance, and do not limit by transportation condition and human factor, be more suitable for the Real-Time Monitoring of high voltage electric equipment running status, have a extensive future.
Utility model content
The purpose of this utility model is, for the problems referred to above, proposes a kind of high voltage electric equipment external discharge UV pulse method detection system, to realize low cost and highly sensitive advantage.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of high voltage electric equipment external discharge UV pulse method detection system, comprises breakdown location device, light-power conversion circuit, high pressure and driving power circuit, I/U change-over circuit, filtering apparatus, pulse signal amplification circuit and data acquisition circuit;
Described filtering apparatus is arranged on the front end of breakdown location device, the output terminal of described breakdown location device is electrically connected with the input end of light-power conversion circuit, the output terminal of described high pressure and driving power circuit is electrically connected with the input end of light-power conversion circuit, the output terminal of described light-power conversion circuit is electrically connected with the input end of I/U change-over circuit, the described output terminal of I/U change-over circuit is electrically connected with the input end of pulse signal amplification circuit, and the output terminal of described pulse signal amplification circuit is electrically connected with the input end of data acquisition circuit;
Ultraviolet light after filtration electro-optical device is discharged after locating device detects, light-power conversion circuit converts the ultraviolet signal that breakdown location device detects to current pulse signal, and this current pulse signal transfers to data acquisition circuit successively after I/U change-over circuit and pulse signal amplification circuit.
Further, described filtering apparatus is optical interference filter.
Further, described breakdown location device, comprise location cylinder, photomultiplier and CCD camera, described location cylinder is arranged on the front end of photomultiplier, and described CCD camera is arranged on the below of photomultiplier.
Further, also comprise red laser transmitter, described red laser transmitter is arranged on below CCD camera, and the light that red laser transmitter is launched is parallel with location cylinder.
Further, described high pressure and driving power circuit, comprise C9619 high-voltage power supply, electric capacity C1, electric capacity C2 and electric capacity C3, described electric capacity C1 and electric capacity C2 is in parallel, and the parallel circuit that electric capacity C1 and electric capacity C2 forms is connected in parallel on the input end of C9619 high-voltage power supply, described electric capacity C3 is connected in parallel on the output terminal of C9619 high-voltage power supply.
Further, the capacitance of described electric capacity C1 is 0.1 μ F, and the capacitance of described electric capacity C2 is 220 μ F, and the capacitance of described electric capacity C3 is 0.022 μ F.
The technical solution of the utility model has following beneficial effect:
The technical solution of the utility model, breakdown location device is utilized to detect ultraviolet, the ultraviolet light detected is collected by data acquisition circuit through light-power conversion circuit, high pressure and driving power circuit, I/U change-over circuit, filtering apparatus and pulse signal amplification circuit successively, because circuit structure is simple, cost is lower, and the high pressure arranged on light-power conversion circuit and driving power circuit are to the detection sensitivity adding system.Thus reach low cost and highly sensitive object.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the high voltage electric equipment external discharge UV pulse method detection system described in the utility model embodiment;
Fig. 2 is the high-voltage power circuit connection layout described in the utility model embodiment;
Fig. 3 is the electronic circuitry of the low ripple noise high-voltage output circuit described in the utility model embodiment;
Fig. 4 is the theory diagram of the breakdown location device described in the utility model embodiment;
Fig. 5 is the electronic circuitry of the pulse signal amplification circuit described in the utility model embodiment.
By reference to the accompanying drawings, in the utility model embodiment, Reference numeral is as follows:
1-locates cylinder; 2-external optical signals.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of high voltage electric equipment external discharge UV pulse method detection system, comprises breakdown location device, light-power conversion circuit, high pressure and driving power circuit, I/U change-over circuit, filtering apparatus, pulse signal amplification circuit and data acquisition circuit;
Filtering apparatus is arranged on the front end of breakdown location device, the output terminal of breakdown location device is electrically connected with the input end of light-power conversion circuit, the output terminal of high pressure and driving power circuit is electrically connected with the input end of light-power conversion circuit, the output terminal of light-power conversion circuit is electrically connected with the input end of I/U change-over circuit, the output terminal of I/U change-over circuit is electrically connected with the input end of pulse signal amplification circuit, and the output terminal of pulse signal amplification circuit is electrically connected with the input end of data acquisition circuit;
Ultraviolet light after filtration electro-optical device is discharged after locating device detects, light-power conversion circuit converts the ultraviolet signal that breakdown location device detects to current pulse signal, and this current pulse signal transfers to data acquisition circuit successively after I/U change-over circuit and pulse signal amplification circuit.
Wherein, filtering apparatus is optical interference filter.
Breakdown location device, comprise location cylinder, photomultiplier and CCD camera, described location cylinder is arranged on the front end of photomultiplier, and described CCD camera is arranged on the below of photomultiplier.
Breakdown location device also comprises red laser transmitter, and red laser transmitter is arranged on below CCD camera, and the light that red laser transmitter is launched is parallel with location cylinder.
High pressure and driving power circuit, comprise C9619 high-voltage power supply, electric capacity C1, electric capacity C2 and electric capacity C3, described electric capacity C1 and electric capacity C2 is in parallel, and the parallel circuit that electric capacity C1 and electric capacity C2 forms is connected in parallel on the input end of C9619 high-voltage power supply, described electric capacity C3 is connected in parallel on the output terminal of C9619 high-voltage power supply.The capacitance of the capacitance of electric capacity C1 to be the capacitance of 0.1 μ F, electric capacity C2 be 220 μ F, electric capacity C3 is 0.022 μ F.
Light-power conversion circuit is the core of detection system, mainly adopts photomultiplier.
R2078 day blind type photomultiplier gain and impressed voltage there is close relationship, the size of impressed voltage not only determines the gain of photomultiplier, also determines the amplitude of the Distance geometry ultraviolet light pulse of detection.
High pressure and driving power circuit: photomultiplier needs the high pressure applying direct current on negative electrode, each dynode and anode, photocathode is electron emission under photon effect, these electronics are accelerated by external electric field (or magnetic field), focus on first time pole, these electronic energies impacting time pole make time pole discharge more electronics, and they are focused on second time pole again, like this, generally double through more than ten times, enlargement factor can reach 108 ~ 1010.Finally, the photocurrent be exaggerated is collected at the anode of noble potential.The small high-voltage power C9619 that native system adopts Japanese Bin Song company to produce provides accelerating field.
C9619 high-voltage power supply is characterized in integrated height, and volume is little, compact conformation, and input power accommodation is wide, and output voltage continuously adjustabe is portable, and driving power can adopt various ways etc., is generally used for miniature instrument.What C9619 exported is negative high voltage, C9619 maximum output voltage is-2000V, the technical program adopts the mode of potentiometer adjustment, at the potentiometer of High voltage output control end access 50K, output can be changed as shown in Figure 2 by the voltage-to-ground controlling pin 3, because output voltage is higher, there is the function limiting output voltage when overload or short circuit, when control voltage is more than 5.2V, module is automatically closed high voltage and is exported.
Photomultiplier is very high to the stability requirement of high-voltage suppling power, generally will reach 0.01% ~ 0.05%, and the stability of high-voltage power supply is usually than high about 10 times of the stability required by photomultiplier.C9619 output ripple noise is 0.003%, the driving power of the C9619 used due to system is 220V AC rectification is+12V, so driving power poor stability, fluctuate larger, in order to reduce high-voltage suppling power output ripple noise and stable output further, carried out further improvement to high-voltage power supply circuit, the low ripple noise high-voltage output circuit after its improvement as shown in Figure 3.
Input end adopts the connected mode of Capacitance parallel connection, to reduce the vibration that high and low frequency signal causes, electric capacity C3 is then as the energy-storage travelling wave tube of high power pulse, because when large fast pulse, directly electric charge is provided to have little time by power supply, capacitor deposit pulse electric charge must be added with, voltage stabilizing output voltage.
System power supply comprises two parts: high-pressure modular C9619 and pulse amplifying IN128 driving power, C9619 driving power input voltage is+12V, IN128 driving voltage is+12V and-12V, native system adopts the Switching Power Supply GZM-H40T5 ± 12R of general moral nova power technology company limited, it provides ± 12 voltages simultaneously, drives high-pressure modular and pulse amplifier IN128 simultaneously.
Therefore, high pressure and driving power circuit mainly comprise C9619 circuit and Switching Power Supply GZM-H40T5 ± 12R.
Filtering apparatus: ultraviolet wavelength coverage is 40nm ~ 400nm, the ultraviolet major part wavelength that high voltage electric equipment electric discharge produces is in the region of 280nm ~ 400nm, also fraction wavelength is had to be less than 280nm, also containing ultraviolet in sunshine, the ultraviolet being less than 300nm due to wavelength absorb by the ozone in air, so can by the ultraviolet only having 300nm ~ 400nm of propagation in atmosphere, and the ultravioplet photomultiplier R2078 detecting band that the technical program adopts is 160nm-320nm, there is the part more than 300nm, the interference of a part of ultraviolet light in daylight can be subject to, because the radiation intensity relative discharge radiant light of this part light in daylight is much larger, so day blind ultraviolet filter must be added in front end to remove the interference of this part UV radiation.So just avoid the complex background that the most powerful lamp-sun causes, ensure that the interference from daylight and other factors of the ultraviolet signal that receives when blind ultraviolet band detects insulator arc-over in day.
Based on the detection requirement of native system, native system have selected " sun is blind " optical filter of Shenyang Hui Bo company, it is a kind of wide-band interference optical filter, the percent transmittance T% led in scope at whole light is 10% ~ 20%, and centre wavelength is 252.8nm, is just in time positioned at day-old chick territory, half band-width 16.9nm, peak value projection ratio 28.4%, has good wavelength positioning precision, half-wave bandwidth accuracy, and form factor (squaring degree), peak transmission etc. all touch the mark.
Breakdown location device, as shown in Figure 4: be made up of two optical channels, a Red Beds In Small generating laser and CCD camera, three fixes position and optical axis is parallel to each other.The diameter cylinder type pipe slightly larger than photomultiplier diameter is installed in photomultiplier front end, when PMT(photomultiplier) just will be the strongest to the ultraviolet signal received during discharge position, depart from discharge position far away, then signal attenuation will be larger, therefore can determine the position of point of discharge according to the power of light pulse signal.The length increasing location cylinder can improve positioning precision, but the luminous flux that PMT receives will reduce, and systems axiol-ogy sensitivity declines.Visible Light CCD Camera in device is to high-tension apparatus imaging, the position that photomultiplier is aimed at can be indicated, the occasion of insufficient light at night, red laser transmitter can be utilized to carry out auxiliary positioning, the light signal that laser beam emitting device is launched is approximately straight line, can the position aimed at of judgment means according to the light spot position of laser.
I/U change-over circuit: photomultiplier output current signal, and the subsequent conditioning circuit be connected with it, generally designs based on voltage signal, and therefore, a conventional pull-up resistor completes the conversion of current-voltage.The technical program be photomultiplier transit tube anode be connected in series pull-up resistor between ground and realize.
Pulse signal amplification circuit: adopt instrumentation amplifier INA128, INA128 have employed the differential amplifier that three amplifiers are formed, and has carried out single-chip integration, because the circuit of inside and each resistance have all carried out accurate adjustment, has excellent amplification performance.When amplification 100 times, its common-mode rejection ratio Gao Keda 120dB, gain error is 0.05%, and bandwidth can reach 200kHz, and pulse signal amplification circuit connection layout as figure 5 illustrates.
Data acquisition circuit adopts, the PCI9812 data collecting card of ADLINK company.
Last it is noted that the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although be described in detail the utility model with reference to previous embodiment, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.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 (6)
1. a high voltage electric equipment external discharge UV pulse method detection system, it is characterized in that, comprise breakdown location device, light-power conversion circuit, high pressure and driving power circuit, I/U change-over circuit, filtering apparatus, pulse signal amplification circuit and data acquisition circuit;
Described filtering apparatus is arranged on the front end of breakdown location device, the output terminal of described breakdown location device is electrically connected with the input end of light-power conversion circuit, the output terminal of described high pressure and driving power circuit is electrically connected with the input end of light-power conversion circuit, the output terminal of described light-power conversion circuit is electrically connected with the input end of I/U change-over circuit, the described output terminal of I/U change-over circuit is electrically connected with the input end of pulse signal amplification circuit, and the output terminal of described pulse signal amplification circuit is electrically connected with the input end of data acquisition circuit;
Ultraviolet light after filtration electro-optical device is discharged after locating device detects, light-power conversion circuit converts the ultraviolet signal that breakdown location device detects to current pulse signal, and this current pulse signal transfers to data acquisition circuit successively after I/U change-over circuit and pulse signal amplification circuit.
2. high voltage electric equipment external discharge UV pulse method detection system according to claim 1, it is characterized in that, described filtering apparatus is optical interference filter.
3. high voltage electric equipment external discharge UV pulse method detection system according to claim 1, it is characterized in that, described breakdown location device, comprise location cylinder, photomultiplier and CCD camera, described location cylinder is arranged on the front end of photomultiplier, and described CCD camera is arranged on the below of photomultiplier.
4. high voltage electric equipment external discharge UV pulse method detection system according to claim 1, it is characterized in that, also comprise red laser transmitter, described red laser transmitter is arranged on below CCD camera, and the light that red laser transmitter is launched is parallel with location cylinder.
5. the high voltage electric equipment external discharge UV pulse method detection system according to claim 1,3 or 4, it is characterized in that, described high pressure and driving power circuit, comprise C9619 high-voltage power supply, electric capacity C1, electric capacity C2 and electric capacity C3, described electric capacity C1 and electric capacity C2 is in parallel, and the parallel circuit that electric capacity C1 and electric capacity C2 forms is connected in parallel on the input end of C9619 high-voltage power supply, described electric capacity C3 is connected in parallel on the output terminal of C9619 high-voltage power supply.
6. high voltage electric equipment external discharge UV pulse method detection system according to claim 5, is characterized in that, the capacitance of described electric capacity C1 is 0.1 μ F, and the capacitance of described electric capacity C2 is 220 μ F, and the capacitance of described electric capacity C3 is 0.022 μ F.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526437A (en) * | 2016-10-21 | 2017-03-22 | 宁波市艾霖信息科技有限公司 | High-voltage electric power equipment weak current detection system and method based on photomultiplier |
| CN107179487A (en) * | 2017-05-31 | 2017-09-19 | 广州供电局有限公司 | Partial discharge of switchgear monitoring device and method |
| CN109001604A (en) * | 2018-10-17 | 2018-12-14 | 湖北工业大学 | A kind of strength grading system and method based on local discharge of electrical equipment |
| CN110940902A (en) * | 2019-12-06 | 2020-03-31 | 西安锐驰电器有限公司 | Method for detecting abnormal discharge condition of power equipment |
| CN111308290A (en) * | 2020-03-06 | 2020-06-19 | 西安交通大学 | Partial discharge detection device based on silicon photomultiplier |
-
2015
- 2015-11-11 CN CN201520894408.8U patent/CN205229388U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526437A (en) * | 2016-10-21 | 2017-03-22 | 宁波市艾霖信息科技有限公司 | High-voltage electric power equipment weak current detection system and method based on photomultiplier |
| CN107179487A (en) * | 2017-05-31 | 2017-09-19 | 广州供电局有限公司 | Partial discharge of switchgear monitoring device and method |
| CN109001604A (en) * | 2018-10-17 | 2018-12-14 | 湖北工业大学 | A kind of strength grading system and method based on local discharge of electrical equipment |
| CN109001604B (en) * | 2018-10-17 | 2021-02-02 | 湖北工业大学 | Intensity grading system and method based on partial discharge of electrical equipment |
| CN110940902A (en) * | 2019-12-06 | 2020-03-31 | 西安锐驰电器有限公司 | Method for detecting abnormal discharge condition of power equipment |
| CN111308290A (en) * | 2020-03-06 | 2020-06-19 | 西安交通大学 | Partial discharge detection device based on silicon photomultiplier |
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