CN103344934B - The detection check method and system of Partial Discharge in Power Transformer sonac - Google Patents
The detection check method and system of Partial Discharge in Power Transformer sonac Download PDFInfo
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- CN103344934B CN103344934B CN201310297798.6A CN201310297798A CN103344934B CN 103344934 B CN103344934 B CN 103344934B CN 201310297798 A CN201310297798 A CN 201310297798A CN 103344934 B CN103344934 B CN 103344934B
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Abstract
The invention provides a kind of detection check method and system of Partial Discharge in Power Transformer sonac; Described method comprises steps A, carries out compressional wave detection to described sonac; B, described sonac carry out Partial Discharge Detection to described power transformer; C, described sonac position detection to described shelf depreciation; Described system comprises sonac compressional wave detection system, sonac Partial Discharge in Power Transformer detection system and sonac Partial Discharge in Power Transformer position detecting system.Compared to the prior art, the detection check method and system of a kind of Partial Discharge in Power Transformer sonac provided by the invention achieve different sensors to Partial Discharge in Power Transformer and accurate, the easy Performance Evaluation of detection and localization.
Description
Technical field
The present invention relates to a kind of detection check method and system of sonac, specifically relate to a kind of detection check method and system of Partial Discharge in Power Transformer sonac.
Background technology
Power transformer is one of visual plant in electric system, and its safe operation is significant; In running at the scene, Partial Discharge in Power Transformer is one of major reason causing electric power transformer insulated deterioration.But the accurate location of the inner Partial Discharge Sources of large-scale power transformer, be the difficult problem in high voltage installation Insulation monitoring field always; Every country has carried out a large amount of research work to the mechanism of shelf depreciation in transformer, and has made great progress, and in prior art, the inner Partial Discharge Sources localization method of power transformer comprises:
Existing detection method mainly finds inside transformer by the play a game detection of putting physical quantity of method for ultrasonic locating whether the office of there occurs puts; When inside transformer generation shelf depreciation, can generate electromagnetic waves, the signal such as discharge pulse and ultrasound wave, propagate (oilpaper, winding and dividing plate etc.) in the different medium of ultrasound wave in transformer, arrive the sonac be fixed on transformer oil tank wall; Measured the time delays of the signal that different sensors measures by multiple sonac, the calculating through location algorithm determines that the position in source is put in office.The ultrasonic signal that power transformer partial discharge produces is general very faint, and sonac sensitivity is higher, more easily feeble signal detected, and signal to noise ratio (S/N ratio) also can correspondingly be improved; The effect of transformer partial discharge sonac is exactly that the transformer partial discharge ultrasonic signal received is converted to voltage signal.
The target of transformer partial discharge sonac verification is the response characteristic obtaining sensor, namely determines the transport function of sensor.Usual transport function accurately expression formula is difficult to provide, but in engineer applied, graphically can draw the response characteristic of sensor, namely common sensitivity curve.The usable range of sensor can be assessed by the sensitivity curve of sensor.Sensitivity curve provides with the relation curve of output voltage under frequency and specified criteria usually.
At present, domesticly there is no Partial Discharge in Power Transformer location sonac calibration criterion, therefore provide a kind of detection check method and system for Partial Discharge in Power Transformer sonac to seem particularly important.
Summary of the invention
In order to meet the demand of prior art, the invention provides a kind of detection check method of Partial Discharge in Power Transformer sonac; Described method comprises the steps:
A, compressional wave detection is carried out to described sonac;
B, described sonac carry out Partial Discharge Detection to described power transformer;
C, described sonac position detection to described shelf depreciation.
Preferably, the described sonac in described steps A comprises sonac to be measured and standard ultrasound sensor; Instantaneous state recorder gathers described sonac to be measured and described standard ultrasound sensor respectively to the voltage transient changing value exported after same compressional wave sound source waveform measurement; The acoustical behavior of described sonac to be measured is detected by described voltage transient changing value;
Preferably, Fast Fourier Transform (FFT) process is carried out to described voltage transient changing value, obtain standard ultrasound sensor complex value frequency spectrum S(f
m) and sonac replica spectra U(f to be measured
m); By responding D(f to sonac complex value to be measured
m) amplitude and phase analysis described acoustical behavior is verified; Described sonac complex value response D(f to be measured
m) calculated by formula (1):
Wherein, S
0(f
m) be the response of standard ultrasound sensor complex value, obtained by the primary calibration method result of described standard ultrasound sensor; f
mfor frequency; M=0,1,2 ... (n/2)-1, n is the sampling number of described Fast Fourier Transform (FFT) process;
Preferably, the described sonac in described step B comprises sonac to be measured and standard ultrasound sensor; Instantaneous state recorder gathers described sonac to be measured respectively and described standard ultrasound sensor measures the rear voltage transient changing value exported to same electrode partial discharge model; By the sensitivity of the described sonac to be measured of described voltage transient changing value verification; Output waveform verification after described sonac to be measured and described standard ultrasound sensor being measured same described electrode partial discharge model by oscillograph;
Preferably, Fast Fourier Transform (FFT) process is carried out to described voltage transient changing value, obtain standard ultrasound sensor complex value frequency spectrum S(f
m) and sonac replica spectra U(f to be measured
m); By responding D(f to sonac complex value to be measured
m) amplitude and phase analysis described sensitivity is verified;
Preferably, the number of the described sonac in described step C is that N, N are at least 2; Localization by ultrasonic monitoring system monitors the detection and localization result of described sonac to same electrode partial discharge model respectively; The actual discharge position of described detection and localization result and described electrode partial discharge model is compared the sensitivity judging described sonac; Described actual discharge position is obtained by three-dimensional coordinate measurement;
Preferably, when described sonac is type UHF sensor, the number of described type UHF sensor is that M, M are at least 2; UHF positioning monitoring system monitors the detection and localization result of described type UHF sensor to same described electrode partial discharge model respectively; The actual discharge position of described detection and localization result and described electrode partial discharge model is compared the sensitivity judging described type UHF sensor; Described actual discharge position is obtained by three-dimensional coordinate measurement.
In order to meet the demand of prior art, invention further provides a kind of detection check system of Partial Discharge in Power Transformer sonac; Described detection check system comprises sonac compressional wave detection system, sonac Partial Discharge in Power Transformer detection system and sonac Partial Discharge in Power Transformer position detecting system;
Described sonac compressional wave detection system comprises the sonac to be measured and standard ultrasound sensor that are symmetricly set on oil tank of transformer both sides; Supersonic source analogue means passes through bottom Bracket setting at the center of described oil tank of transformer; Described supersonic source analogue means is connected with oscillograph by prime amplifier; Described sonac to be measured is connected with computing machine respectively by instantaneous state recorder with described standard ultrasound sensor.
Preferably, described supersonic source analogue means is glass capillary supersonic source analogue means; The glass capillary of described supersonic source analogue means is placed on the support of described bottom by glass sheet; The diameter of described glass capillary is 0.2mm; Loading screw rod is vertically set on above described glass capillary; Described loading screw rod applies pressure by glass bar to described glass capillary;
After described loading screw rod applies pressure to described glass capillary, impulsive force when described glass capillary breaks is the step signal of rise time 0.1us; The value of described impulsive force is recorded by the piezoelectric ceramics of described loading screw rod and described oscillograph;
Preferably, described sonac Partial Discharge in Power Transformer detection system comprises the sonac described to be measured and described standard ultrasound sensor that are symmetricly set on described oil tank of transformer both sides; Electrode partial discharge model is arranged on the optional position of described oil tank of transformer; The two ends of described electrode partial discharge model are connected with ground with the high-voltage connection without shelf depreciation step-up transformer respectively by bushing shell for transformer; Described sonac to be measured is connected with described oscillograph respectively with described standard ultrasound sensor; Described sonac to be measured is connected with described computing machine respectively by described instantaneous state recorder with described standard ultrasound sensor;
Preferably, described electrode partial discharge model comprise needle plate electrode model, ball plate electrode model, suspension electrode model, along face electrode model, Air-gap electrode model and plate electrode model; Described electrode partial discharge model realizes floating potential discharge, insulating board creeping discharge, bubble in oil electric discharge and the electric discharge of insulating board defect in needle plate electric discharge in oil, paper oil insulation electric discharge, oil respectively;
Preferably, described sonac Partial Discharge in Power Transformer position detecting system comprises the described electrode partial discharge model and described sonac to be measured that are arranged on the inner optional position of described oil tank of transformer; Described sonac to be measured is connected with localization by ultrasonic monitoring system by feeder line; The number of described sonac to be measured is that N, N are at least 2;
Described localization by ultrasonic monitoring system monitors the detection and localization result of described sonac to be measured to same described electrode partial discharge model respectively; The actual discharge position of described detection and localization result and described electrode partial discharge model is compared the sensitivity judging described sonac to be measured; Described actual discharge position is obtained by three-dimensional coordinate measurement;
Preferably, when described sonac to be measured is type UHF sensor, described type UHF sensor is connected with UHF positioning monitoring system by feeder line; The number of described type UHF sensor is that M, M are at least 2;
Described UHF positioning monitoring system monitors the detection and localization result of described type UHF sensor to same described electrode partial discharge model respectively; The actual discharge position of described detection and localization result and described electrode partial discharge model is compared the sensitivity judging described type UHF sensor; Described actual discharge position is obtained by three-dimensional coordinate measurement.
The invention has the beneficial effects as follows:
1, in technical solution of the present invention, carry out when compressional wave detects, adopting oscillograph to show sonac to be measured and the standard ultrasound sensor output voltage change waveform to same compressional wave sound source wave test respectively to described sonac, more directly perceived, convenient to the multilevel iudge of sonac sensitivity to be measured or acoustical behavior;
2, in technical solution of the present invention, when carrying out compressional wave detection to described sonac, by the complex value response D(f to sonac to be measured
m) amplitude and phase analysis, make sonac sensitivity to be measured or acoustical behavior verification more accurate;
3, in technical solution of the present invention, sonac adopts oscillograph to show sonac to be measured respectively when carrying out Partial Discharge Detection to power transformer and standard ultrasound sensor changes waveform to the output voltage of same local discharge model inspection, more directly perceived, convenient to the multilevel iudge of sonac sensitivity to be measured;
4, in technical solution of the present invention, the supersonic source repeatability that the glass capillary supersonic source analogue means of sonac compressional wave detection system produces is high, stability of characteristics, for the acoustical behavior verification of sonac provides guarantee;
5, in technical solution of the present invention, when sonac carries out Partial Discharge Detection to power transformer, by the complex value response D(f to sonac to be measured
m) amplitude and phase analysis, make sonac sensitivity check to be measured more accurate;
6, in technical solution of the present invention, the electrode partial discharge model of sonac Partial Discharge in Power Transformer detection system can needle plate electric discharge in simulated oil, paper oil insulation electric discharge, floating potential discharge, insulating board creeping discharge, bubble in oil electric discharge and the electric discharge of insulating board defect in oil, for full validation sonac provides test platform accurately;
7, in technical solution of the present invention, sonac Partial Discharge in Power Transformer position detecting system, the qualification between can realizing multiple different sonac detects; Qualification between simultaneously also can realizing multiple different type UHF sensor detects.
8, the detection check method and system of a kind of Partial Discharge in Power Transformer sonac provided by the invention, the sensor produced for different vendor provides a performance comparison platform; Achieve different sensors to the Performance Evaluation that Partial Discharge in Power Transformer detects and detection and localization is accurate, easy.
9, the detection check method and system of a kind of Partial Discharge in Power Transformer sonac provided by the invention, for the domestic present situation that there is no the Performance Detection of Ultrasonic Sensors for Monitoriing Local Discharge in Power Transformer, the relevant criterion of evaluation at present, to the formulation of industry standard from now on, there is reference value.
10, the detection check method and system of a kind of Partial Discharge in Power Transformer sonac provided by the invention, be applicable to the occasion that other adopt sonac detection office to put, as the detection of gas insulated combined electrical equipment (GIS) type local-discharge ultrasonic, reactor type local-discharge ultrasonic detect etc.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is: the detection check system construction drawing of a kind of Partial Discharge in Power Transformer sonac provided by the invention;
Fig. 2 is: the sonac compressional wave detection system structural drawing in the embodiment of the present invention;
Fig. 3 is: the supersonic source analogue means structural drawing in the embodiment of the present invention;
Fig. 4 is: the sonac Partial Discharge in Power Transformer detection system structural drawing in the embodiment of the present invention;
Fig. 5 is: the electrode partial discharge model structural drawing in the embodiment of the present invention;
Fig. 6 is: the sonac Partial Discharge in Power Transformer position detecting system structural drawing in the embodiment of the present invention;
Wherein, 1: fuel tank; 2: transformer oil; 3: sonac to be measured; 4: standard ultrasound sensor; 5: glass capillary supersonic source analogue means; 51: load screw rod; 52: piezoelectric ceramics; 53: glass bar; 54: glass sheet; 55: glass capillary; 6: prime amplifier; 7: oscillograph; 8: instantaneous state recorder; 9: computing machine; 10: electrode partial discharge model; 101: needle plate electrode model; 102: ball plate electrode model; 103: suspension electrode model; 104: along face electrode model; 105: Air-gap electrode model; 106: plate electrode model; 11: bushing shell for transformer 1; 12: bushing shell for transformer 2; 13: high-field electrode; 14: insulating board; 15: ground-electrode; 16: suspended metal; 17: insulating board inherent vice; 18: insulating board parallel clearance; 19: sonac; 20: sonac positioning monitoring system; 21:UHF sensor; 22:UHF positioning monitoring system.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described.
The detection check method step of a kind of Partial Discharge in Power Transformer sonac provided by the invention is: A, carry out compressional wave detection to described sonac; B, described sonac carry out Partial Discharge Detection to described power transformer; C, described sonac position detection to described shelf depreciation;
I:(1) to sonac carry out compressional wave detect time, instantaneous state recorder gathers sonac to be measured and standard ultrasound sensor respectively to the voltage transient changing value exported after same compressional wave sound source waveform measurement;
(2) Fast Fourier Transform (FFT) process is carried out to voltage transient changing value, obtain the amplitude-frequency spectrogram of sensor to be measured and the amplitude-frequency spectrogram of phase spectrogram and standard transducer and phase spectrogram respectively; By carrying out data analysis to above-mentioned amplitude-frequency spectrogram and phase spectrogram thus the sensitivity of multilevel iudge sonac to be measured or acoustical behavior;
Standard ultrasound sensor complex value frequency spectrum S(f
m) and sonac replica spectra U(f to be measured
m) be:
Wherein, n is the sampling number of Fast Fourier Transform (FFT) process;
j=0，1，2…，(n/2)-1；m=0，1，2…，(n/2)-1；
S
jfor the sampled point of the jth in standard ultrasound sensor passage;
U
jfor the jth sampled point in sonac passage to be measured;
F
mbe m frequency, unit MHz;
Sonac complex value response D(f to be measured
m) be:
Sonac complex value response D(f to be measured
m) amplitude r
m=| D (f
m) |, phase place
Wherein, S
0(f
m) be the response of standard ultrasound sensor complex value, obtained by the primary calibration method result of described standard ultrasound sensor;
I
zand R
zrepresent imaginary part and the real part of plural z respectively;
Calibration amplitude W
mthe form of usual dB is expressed as: W
m=20log
10(r
m);
(3) by sonac to be measured and the amplitude of standard ultrasound sensor and the comparative analysis of phase place, accurately can verify the sensitivity of described sonac to be measured or acoustical behavior.
II:(1), when sonac carries out Partial Discharge Detection to described power transformer, instantaneous state recorder gathers sonac to be measured respectively and standard ultrasound sensor measures the rear voltage transient changing value exported to same electrode partial discharge model; The sensitivity of sonac to be measured is verified by voltage transient changing value; Output waveform verification after described sonac to be measured and described standard ultrasound sensor being measured same described electrode partial discharge model by oscillograph;
(2) Fast Fourier Transform (FFT) process is carried out to voltage transient changing value, obtain the amplitude-frequency spectrogram of sensor to be measured and the amplitude-frequency spectrogram of phase spectrogram and standard transducer and phase spectrogram respectively; By carrying out data analysis to above-mentioned amplitude-frequency spectrogram and phase spectrogram thus the sensitivity of multilevel iudge sonac to be measured or acoustical behavior; Wherein standard ultrasound sensor complex value frequency spectrum S(f
m), sonac replica spectra U(f to be measured
m), sonac complex value to be measured response D(f
m), D(f
m) amplitude r
m=| D (f
m) |, D(f
m) phase place
with calibration amplitude W
m=20log
10(r
m) computing method identical with the method for sonac being carried out to compressional wave detection;
(3) by sonac to be measured and the amplitude of standard ultrasound sensor and the comparative analysis of phase place, can the sensitivity acoustics that described sonac power transformer to be measured carries out Partial Discharge Detection accurately be verified.
III: when sonac positions detection to described shelf depreciation, the number of sonac is that N, N are at least 2; Localization by ultrasonic monitoring system monitors the detection and localization result of sonac to same electrode partial discharge model respectively; The actual discharge position of detection and localization result and electrode partial discharge model is compared the sensitivity judging sonac to be measured; Wherein actual discharge position is obtained by three-dimensional coordinate measurement;
When above-mentioned sonac replaces with type UHF sensor, the number of type UHF sensor is that M, M are at least 2; UHF positioning monitoring system monitors the detection and localization result of type UHF sensor to same electrode partial discharge model respectively; The actual discharge position of detection and localization result and electrode partial discharge model is compared the sensitivity judging sonac to be measured; Wherein actual discharge position is obtained by three-dimensional coordinate measurement.
As shown in Figure 1, described detection check system comprises sonac compressional wave detection system, sonac Partial Discharge in Power Transformer detection system and sonac Partial Discharge in Power Transformer position detecting system to the detection check system of a kind of Partial Discharge in Power Transformer sonac provided by the invention;
Fig. 2 shows the sonac compressional wave detection system structural drawing in the present embodiment; Sonac 3 to be measured and standard ultrasound sensor 4 are symmetricly set on oil tank of transformer 1 both sides; Glass capillary supersonic source analogue means 5 passes through bottom Bracket setting at the center of oil tank of transformer 1; Glass capillary supersonic source analogue means 5 is connected with oscillograph 7 by prime amplifier 6; Sonac 3 to be measured is connected with computing machine 9 respectively by instantaneous state recorder 8 with standard ultrasound sensor 4;
Fig. 3 shows the supersonic source analogue means structural drawing in the present embodiment; Supersonic source analogue means is glass capillary supersonic source analogue means; The glass capillary 55 of supersonic source analogue means is placed on the support of bottom by glass sheet 54; The diameter of glass capillary 55 is 0.2mm; Load screw rod 51 vertically to arrange above glass capillary; Load screw rod 51 and apply pressure by glass bar 53 pairs of glass capillaries 55; After loading screw rod 51 pairs of glass capillaries 55 apply pressure, impulsive force when glass capillary 55 breaks is the step signal of rise time 0.1us; The value of impulsive force is by loading piezoelectric ceramics 52(piezoelectricceramictransducer, the PZT of screw rod 51) and oscillograph 7 record;
Fig. 4 shows the sonac Partial Discharge in Power Transformer detection system structural drawing in the present embodiment; Sonac 3 to be measured and standard ultrasound sensor 4 are symmetricly set on oil tank of transformer 1 both sides; Electrode partial discharge model 10 is arranged on the optional position of oil tank of transformer 1 inside; One end of electrode partial discharge model 10 is connected with the high-voltage connection without shelf depreciation step-up transformer by bushing shell for transformer 1, and the other end is by bushing shell for transformer 2 ground connection; Sonac 3 to be measured is connected with oscillograph 7 respectively with standard ultrasound sensor 4; Sonac 3 to be measured is connected with computing machine 9 respectively by instantaneous state recorder 8 with standard ultrasound sensor 4;
Fig. 5 shows the electrode partial discharge model structural drawing in the embodiment of the present invention; Electrode partial discharge model comprise needle plate electrode model, ball plate electrode model, suspension electrode model, along face electrode model, Air-gap electrode model and plate electrode model; Electrode partial discharge model realizes floating potential discharge, insulating board creeping discharge, bubble in oil electric discharge and the electric discharge of insulating board defect in needle plate electric discharge in oil, paper oil insulation electric discharge, oil respectively;
Fig. 6 shows the sonac Partial Discharge in Power Transformer position detecting system structural drawing in the embodiment of the present invention; Sonac 19 is the sonac of multiple different vendor, and described sonac is arranged on the inner optional position of oil tank of transformer 1; Sonac is connected with localization by ultrasonic monitoring system 20 by feeder line; Localization by ultrasonic monitoring system 20 monitors the detection and localization result of sonac 19 to same needle plate electrode model 101 shelf depreciation respectively; The actual discharge position of detection and localization result and needle plate electrode model shelf depreciation is compared, and judges the sensitivity of sonac 19 one by one; Wherein said actual discharge position is obtained by three-dimensional coordinate measurement;
When described sonac replaces with as type UHF sensor 21, type UHF sensor 21 is the type UHF sensor of multiple different vendor; Type UHF sensor 21 is connected with UHF positioning monitoring system 22 by feeder line; UHF positioning monitoring system 22 monitors the detection and localization result of type UHF sensor 21 to same needle plate electrode model 101 shelf depreciation respectively; The actual discharge position of detection and localization result and needle plate electrode model shelf depreciation is compared, and judges the sensitivity of type UHF sensor 21 one by one; Wherein said actual discharge position is obtained by three-dimensional coordinate measurement.
Finally should be noted that: described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Claims (7)
1. a detection check method for Partial Discharge in Power Transformer sonac, is characterized in that, described method comprises the steps:
A, compressional wave detection is carried out to described sonac;
B, described sonac carry out Partial Discharge Detection to described power transformer;
C, described sonac position detection to described shelf depreciation;
Described sonac in described steps A comprises sonac to be measured and standard ultrasound sensor; Instantaneous state recorder gathers described sonac to be measured and described standard ultrasound sensor respectively to the voltage transient changing value exported after same compressional wave sound source waveform measurement; The acoustical behavior of described sonac to be measured is detected by described voltage transient changing value;
Described sonac in described step B comprises sonac to be measured and standard ultrasound sensor; Instantaneous state recorder gathers described sonac to be measured respectively and described standard ultrasound sensor measures the rear voltage transient changing value exported to same electrode partial discharge model; By the sensitivity of the described sonac to be measured of described voltage transient changing value verification; Output waveform verification after described sonac to be measured and described standard ultrasound sensor being measured same described electrode partial discharge model by oscillograph;
The number of the described sonac in described step C is that N, N are at least 2; Localization by ultrasonic monitoring system monitors the detection and localization result of described sonac to same electrode partial discharge model respectively; The actual discharge position of described detection and localization result and described electrode partial discharge model is compared the sensitivity judging described sonac; Described actual discharge position is obtained by three-dimensional coordinate measurement;
Described compressional wave sound source is glass capillary supersonic source analogue means; The glass capillary of described compressional wave sound source is placed on the support of bottom by glass sheet; The diameter of described glass capillary is 0.2mm; Loading screw rod is vertically set on above described glass capillary; Described loading screw rod applies pressure by glass bar to described glass capillary;
After described loading screw rod applies pressure to described glass capillary, impulsive force when described glass capillary breaks is the step signal of rise time 0.1us; The value of described impulsive force is recorded by the piezoelectric ceramics of described loading screw rod and described oscillograph.
2. the detection check method of a kind of Partial Discharge in Power Transformer sonac as claimed in claim 1, is characterized in that, carries out Fast Fourier Transform (FFT) process to described voltage transient changing value, obtains standard ultrasound sensor complex value frequency spectrum S (f
m) and sonac complex value frequency spectrum U (f to be measured
m); By responding D (f to sonac complex value to be measured
m) amplitude and phase analysis described acoustical behavior is verified; Described sonac complex value response D (f to be measured
m) calculated by formula (1):
Wherein, S
0(f
m) be the response of standard ultrasound sensor complex value, obtained by the primary calibration method result of described standard ultrasound sensor; f
mfor frequency; M=0,1,2 ... (n/2)-1, n is the sampling number of described Fast Fourier Transform (FFT) process.
3. the detection check method of a kind of Partial Discharge in Power Transformer sonac as claimed in claim 1, is characterized in that, carries out Fast Fourier Transform (FFT) process to described voltage transient changing value, obtains standard ultrasound sensor complex value frequency spectrum S (f
m) and sonac complex value frequency spectrum U (f to be measured
m); By responding D (f to sonac complex value to be measured
m) amplitude and phase analysis described sensitivity is verified.
4. the detection check system of a Partial Discharge in Power Transformer sonac, it is characterized in that, described detection check system comprises sonac compressional wave detection system, sonac Partial Discharge in Power Transformer detection system and sonac Partial Discharge in Power Transformer position detecting system;
Described sonac compressional wave detection system comprises the sonac to be measured and standard ultrasound sensor that are symmetricly set on oil tank of transformer both sides; Supersonic source analogue means passes through bottom Bracket setting at the center of described oil tank of transformer; Described supersonic source analogue means is connected with oscillograph by prime amplifier; Described sonac to be measured is connected with computing machine respectively by instantaneous state recorder with described standard ultrasound sensor;
Described supersonic source analogue means is glass capillary supersonic source analogue means; The glass capillary of described supersonic source analogue means is placed on the support of described bottom by glass sheet; The diameter of described glass capillary is 0.2mm; Loading screw rod is vertically set on above described glass capillary; Described loading screw rod applies pressure by glass bar to described glass capillary;
After described loading screw rod applies pressure to described glass capillary, impulsive force when described glass capillary breaks is the step signal of rise time 0.1us; The value of described impulsive force is recorded by the piezoelectric ceramics of described loading screw rod and described oscillograph.
5. the detection check system of a kind of Partial Discharge in Power Transformer sonac as claimed in claim 4, it is characterized in that, described sonac Partial Discharge in Power Transformer detection system comprises the sonac described to be measured and described standard ultrasound sensor that are symmetricly set on described oil tank of transformer both sides; Electrode partial discharge model is arranged on the optional position of described oil tank of transformer; The two ends of described electrode partial discharge model are connected with ground with the high-voltage connection without shelf depreciation step-up transformer respectively by bushing shell for transformer; Described sonac to be measured is connected with described oscillograph respectively with described standard ultrasound sensor; Described sonac to be measured is connected with described computing machine respectively by described instantaneous state recorder with described standard ultrasound sensor.
6. the detection check system of a kind of Partial Discharge in Power Transformer sonac as claimed in claim 5, it is characterized in that, described electrode partial discharge model comprise needle plate electrode model, ball plate electrode model, suspension electrode model, along face electrode model, Air-gap electrode model and plate electrode model; Described electrode partial discharge model realizes floating potential discharge, insulating board creeping discharge, bubble in oil electric discharge and the electric discharge of insulating board defect in needle plate electric discharge in oil, paper oil insulation electric discharge, oil respectively.
7. the detection check system of a kind of Partial Discharge in Power Transformer sonac as described in claim 4 or 5, it is characterized in that, described sonac Partial Discharge in Power Transformer position detecting system comprises the electrode partial discharge model and described sonac to be measured that are arranged on the inner optional position of described oil tank of transformer; Described sonac to be measured is connected with localization by ultrasonic monitoring system by feeder line; The number of described sonac to be measured is that N, N are at least 2;
Described localization by ultrasonic monitoring system monitors the detection and localization result of described sonac to be measured to same described electrode partial discharge model respectively; The actual discharge position of described detection and localization result and described electrode partial discharge model is compared the sensitivity judging described sonac to be measured; Described actual discharge position is obtained by three-dimensional coordinate measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310297798.6A CN103344934B (en) | 2013-07-15 | 2013-07-15 | The detection check method and system of Partial Discharge in Power Transformer sonac |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310297798.6A CN103344934B (en) | 2013-07-15 | 2013-07-15 | The detection check method and system of Partial Discharge in Power Transformer sonac |
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| Publication Number | Publication Date |
|---|---|
| CN103344934A CN103344934A (en) | 2013-10-09 |
| CN103344934B true CN103344934B (en) | 2016-01-20 |
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| CN103591975B (en) * | 2013-11-20 | 2016-05-11 | 深圳市航盛电子股份有限公司 | A kind of ultrasonic sensor index detection method and device |
| CN103913714B (en) * | 2014-04-09 | 2017-01-25 | 国家电网公司 | Calibration system of partial discharge supersonic detector |
| CN104199717B (en) * | 2014-08-04 | 2017-10-27 | 西安交通大学 | The method for numerical simulation of ebb-flow discharge Three-Dimensional Dynamic evolutionary process in a kind of insulating oil |
| CN105319525A (en) * | 2015-12-02 | 2016-02-10 | 国网浙江省电力公司电力科学研究院 | Test platform for calibrating ultrasonic partial discharge tester |
| CN106197334B (en) * | 2016-06-30 | 2019-04-19 | 上海交通大学 | The online three-dimensional imaging monitoring method of transformer winding ultrasonic wave and system |
| CN108269680B (en) * | 2018-01-23 | 2019-08-23 | 华北电力大学（保定） | A kind of wall-attaching type ultrasonic sensor arragement construction |
| CN108776238B (en) * | 2018-07-27 | 2020-08-14 | 中科传启（苏州）科技有限公司 | Ultrasonic anemometer transducer performance deterioration state detection method |
| CN109917247A (en) * | 2019-03-28 | 2019-06-21 | 珠海市伊特高科技有限公司 | A kind of GIS ultrahigh frequency local discharge on-line monitoring device and method using accumulative PRPD technology |
| CN111624431B (en) * | 2020-06-24 | 2021-11-23 | 西安交通大学 | GIS solid insulation multi-sample three-factor aging test device and test method |
| CN112729592B (en) * | 2020-12-18 | 2022-08-02 | 山东大学 | Transformer hot spot temperature measuring system and method |
| CN112924917A (en) * | 2020-12-29 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | On-site calibration platform of ultrahigh frequency partial discharge on-line monitoring system |
| CN115128411A (en) * | 2022-06-29 | 2022-09-30 | 南方电网科学研究院有限责任公司 | Frequency response verification method and system for common-path optical fiber ultrasonic sensing system |
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| JPH0469577A (en) * | 1990-07-10 | 1992-03-04 | Meidensha Corp | Detector for local discharge in insulation gas |
| JPH0545401A (en) * | 1991-08-09 | 1993-02-23 | Meidensha Corp | Inspection circuit of partial discharge monitoring device |
| CN201464634U (en) * | 2009-09-08 | 2010-05-12 | 保定天威集团有限公司 | Head-held partial-discharge ultrasonic sensor calibrator |
| CN102866375B (en) * | 2012-09-07 | 2014-12-17 | 广东电网公司电力科学研究院 | System and method for calibrating receiving performance of partial-discharge ultrahigh frequency detection device |
| CN102866377B (en) * | 2012-09-17 | 2016-03-09 | 中国电力科学研究院 | The detection check system and method for the online monitoring assembly of transformer partial discharge and location |
| CN202995018U (en) * | 2012-11-21 | 2013-06-12 | 浙江省电力公司电力科学研究院 | Calibrating device of partial discharge detecting device |
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