CN106610466A - Method and device for constructing pulse current waveform rising edge time width-phase spectrum - Google Patents

Method and device for constructing pulse current waveform rising edge time width-phase spectrum Download PDF

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Publication number
CN106610466A
CN106610466A CN201611198132.5A CN201611198132A CN106610466A CN 106610466 A CN106610466 A CN 106610466A CN 201611198132 A CN201611198132 A CN 201611198132A CN 106610466 A CN106610466 A CN 106610466A
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Prior art keywords
rising edge
width
pulse current
waveform
during
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CN201611198132.5A
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CN106610466B (en
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徐鹏
高凯
陆启宇
李腾飞
袁鹏
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Xi'an Mao Rong Electric Equipment Co Ltd
State Grid Shanghai Electric Power Co Ltd
East China Power Test and Research Institute Co Ltd
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Xi'an Mao Rong Electric Equipment Co Ltd
State Grid Shanghai Electric Power Co Ltd
East China Power Test and Research Institute Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

The invention relates to a method and a device for constructing a partial discharge pulse current waveform rising edge time width-phase spectrum. The constructing method comprises steps: acquisition parameters are set; based on the acquisition parameters and an ultra wideband detection technology, a partial discharge pulse current waveform-time sequence is acquired; a rising edge time width is extracted from the partial discharge pulse current waveform, and a rising edge time width-time sequence is acquired; and the rising edge time width-time sequence is converted to a rising edge time width-phase sequence, and display of a rising edge time width-phase sequence spectrum is carried out. Compared with the prior art, the method and the device have the advantages of simply and practically acquiring richer partial discharge information.

Description

Width-phase place spectrogram building method and device during pulse current waveform rising edge
Technical field
The present invention relates to the shelf depreciation information processing technology, more particularly, to width during a kind of pulse current waveform rising edge- Phase place spectrogram building method and device.
Background technology
When Partial Discharge Detection is carried out to insulation of electrical installation (paper oil insulation, gas-insulated etc.), it is assumed that preferable Under noise eliminating technology, the detection based on partial discharge pulse's peak value-time (phase place) sequence for exist put source for many innings when (bag Containing two), it will be the peak value-phase sequence (PRPD) of random aliasing that data are put in the office that system is obtained.Inside insulation of electrical installation The Partial Discharge Sources of presence are unknown, but under the stable operating mode of Partial Discharge Sources, the transmission path being made up of detecting system It is to determine.The pulse current time domain waveform that different discharge sources or signal interference source are formed on detecting system loop has larger Difference, but only then cannot be distinguished by by amplitude.Widely use at present, traditional PRPD spectrograms are not enough to represent comprising more Useful information, also it is not used to process the operating mode for putting source or stochastic pulse interference source for many innings.
The content of the invention
The purpose of the present invention is exactly the defect in order to overcome above-mentioned prior art to exist and provides a kind of simple, practicality, obtains Data volume abundant pulse current waveform rising edge when width-phase place spectrogram building method and device.
The purpose of the present invention can be achieved through the following technical solutions：
Width-phase place spectrogram building method during a kind of pulse current of PD waveform rising edge, including：
The step of acquisition parameter is set；
Carry out pulse current of PD waveform-time serieses with the acquisition parameter, based on ultra broadband detection technique to adopt The step of collection；
Width when rising edge is extracted from the pulse current of PD waveform, and width-time serieses when obtaining rising edge The step of；
Width-phase sequence when width-time serieses during the rising edge are converted into into rising edge, and carry out width during rising edge- The step of phase sequence spectrogram shows.
Also include：
The step that width-time serieses when the pulse current of PD waveform-time serieses and rising edge are stored Suddenly.
It is described that width is specially during extraction rising edge from the pulse current of PD waveform：
Wherein, trpFor pulse current waveform rising edge when width,For rising edge a%ApeakLocate the corresponding time,For upper Rise along b%ApeakLocate corresponding time, ApeakFor pulse current waveform peak value, a ＞ b.
The a and b difference values are 90 and 10.
Width-phase place spectrogram constructing apparatus during a kind of pulse current of PD waveform rising edge, including：
Setup module, for arranging acquisition parameter；
Acquisition module, for carrying out pulse current of PD ripple with the acquisition parameter, based on ultra broadband detection technique Shape-time serieses collection；
Extraction module, width during for extracting rising edge from the pulse current of PD waveform, and obtain rising edge When width-time serieses；
Spectrogram generates display module, width-phase place sequence during for width-time serieses during the rising edge to be converted into into rising edge Row, and carry out width during rising edge-phase sequence spectrogram displaying.
Also include：
Memory module, for width-time serieses when the pulse current of PD waveform-time serieses and rising edge Stored.
In the extraction module, width is specially when rising edge is extracted from the pulse current of PD waveform：
Wherein, trpFor pulse current waveform rising edge when width,For rising edge a%ApeakLocate the corresponding time,For upper Rise along b%ApeakLocate corresponding time, ApeakFor pulse current waveform peak value, a ＞ b.
The a and b difference values are 90 and 10.
One kind realizes discharge source based on width-phase place spectrogram building method during above-mentioned pulse current of PD waveform rising edge Mirror method for distinguishing, including：
Width-phase sequence spectrogram when obtaining rising edge；
Partial Discharge Sources are gone out according to width during the rising edge-phase sequence mass spectrum database, and judges whether interference source.
Compared with prior art, the invention has the advantages that：
(1) construction process of width-phase sequence spectrogram when the present invention devises pulse current of PD waveform rising edge, Simply, it is practical；
(2) width-phase sequence spectrogram includes abundant shape information during the rising edge for being obtained by the inventive method；
(3) width-phase sequence spectrogram can be advantageously used in many innings and put source and disturbing pulse source during rising edge of the invention Analysis.
Description of the drawings
Fig. 1 is the schematic flow sheet of the inventive method；
Fig. 2 is the structural representation of apparatus of the present invention；
Fig. 3 is according to the present invention based on ultra broadband detection technique acquisition pulse current waveform-seasonal effect in time series schematic diagram；
Width extracts schematic diagram when Fig. 4 is impulse waveform rising edge according to the present invention；
Fig. 5 is the schematic diagram that the inventive method is used for test result analysis.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in detail with specific embodiment.The present embodiment is with technical solution of the present invention Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to Following embodiments.
Traditional phase-resolved partial discharge (PRPD) spectrograms are not enough to represent comprising more Useful information, also it is not used to process the operating mode for putting source or stochastic pulse interference source for many innings.The present invention is tried hard to from practical application Set out, overcome existing PRPD spectrograms to lose the weak point compared with multi information, propose that a kind of pulse current of PD waveform rises Along when width-phase place spectrogram building method.As shown in figure 1, the building method includes：
In step 101, acquisition parameter is set, is carried out local with the acquisition parameter of setting, based on ultra broadband detection technique and is put Electric pulse current waveform-time serieses collection；
In step 102, the pulse current of PD waveform-time serieses to gathering are stored；
In step 103, width when rising edge is extracted from pulse current of PD waveform, and when obtaining rising edge width-when Between sequence；
In step 104, width-phase sequence when width-time serieses during rising edge are converted into into rising edge, and carry out rising edge When width-phase sequence phase-resolved rise-time (PRRT) spectrogram show.Width-phase during the rising edge that the method is obtained Bit sequence spectrogram can be compared analysis with traditional PRPD spectrograms.
Be illustrated in figure 3 carries out pulse current of PD waveform-time serieses collection based on ultra broadband detection technique A kind of embodiment.In the embodiment, test product is tested with detection impedance ZmOne end connects, and detects impedance ZmThe other end is grounded, should Detection impedance ZmResponsive bandwidth need to reach ns levels, the time domain waveform of the pulse current of PD that will not distort, and the embodiment Used in ultra broadband high-speed pulse recording equipment sample rate need to 100MS/s and more than, analog bandwidth 50M and more than, note The pulse current waveform of address book stored-time serieses P (tj) be defined as follows：
Note：J --- j-th pulse current；
tj--- j-th pulse current waveform record time (μ s gather the moment)；
K --- each impulse waveform is made up of k point；
pi--- the corresponding amplitude (mA/mV) of i-th point of pulse current waveform；
I-th point of Δ t (i-1) --- the pulse current waveform corresponding time (ns, Δ t are sampling time interval).
In other embodiments of the invention, impedance Z is detectedmCoupled capacitor device low-voltage arm electric capacity C can be serially connected in2With earth mat it Between, detect impedance ZmAlso can transform to the high frequency small current detection sensor such as Luo-coil, noninductive resistance.
In described step 103, width is specially when rising edge is extracted from pulse current of PD waveform：
Wherein, trpFor pulse current waveform rising edge when width,For rising edge a%ApeakLocate the corresponding time,For upper Rise along b%ApeakLocate corresponding time, a ＞ b, ApeakFor pulse current waveform peak value, Apeak(j)=max (P (tj)), wherein, j For j-th pulse current；Max is the maximum (mA/mV) of pulse current waveform.
The value of a and b can be arranged as required to, and this is implemented in you, and a and b is taken as respectively 90 and 10.
In the present invention, when the conversion of m- phase sequence be defined as：
Apeak(φj)=Apeak(tj)
φj={ (tj/20)-QZ[(tj/20)]}×360
Note：J --- j-th pulse current；
φj--- j-th pulse current waveform gathers corresponding phase place (°)；
QZ --- round numbers.
As shown in Fig. 2 width-phase place spectrogram structure when the present embodiment also provides a kind of pulse current of PD waveform rising edge Device 2 is made, including setup module 201, acquisition module 202, extraction module 203, spectrogram generate display module 204 and memory module 205, wherein, setup module 201 is used to arrange acquisition parameter；Acquisition module 202 is used for the acquisition parameter of setting, based on ultra-wide Band detection technique carries out pulse current of PD waveform-time serieses collection；Extraction module 203 is used for from partial discharge pulse Width when rising edge is extracted in current waveform, and width-time serieses when obtaining rising edge；Spectrogram generation display module 204 is used for will Width-phase sequence when width-time serieses are converted into rising edge during rising edge, and carry out width during rising edge-phase sequence spectrogram exhibition Show；Memory module 205 is used to deposit width-time serieses when pulse current of PD waveform-time serieses and rising edge Storage.
Width-phase place spectrogram building method can be used to realize that discharge source is reflected during above-mentioned pulse current of PD waveform rising edge Not, Partial Discharge Sources are gone out according to width during rising edge-phase sequence mass spectrum database, and judges whether interference source.As Fig. 5 shows The building method is used for the analysis result of high pressure hall partial discharge test.Pulse current waveform-time that detection is obtained Sequence obtains as shown in Figure 1 the PRRT spectrograms of neotectonics after flow processing, it is compared with traditional PRPD, PRPD spectrograms Amplitude distribution on cannot be distinguished by with the presence or absence of 2 partial discharge pulse sources, but substantially deposit in width distribution during the rising edge of PRRT In 2 kinds of pulse sources, width distributed area is [40,60] ns during a kind of rising edge of pulse source, and its typical pulse shape is as shown in the figure Time domain waveform 1, and width distributed area is [20,30] ns during the rising edge of another kind of pulse source, and its typical pulse shape is as schemed Shown time domain waveform 2.Width distributed area during the rising edge of foundation PRRT, classification has obtained 2 traditional PRPD_1 and PRPD_ 2 spectrograms, represent respectively two Partial Discharge Sources.

Claims (9)

1. width-phase place spectrogram building method during a kind of pulse current of PD waveform rising edge, it is characterised in that include：
The step of acquisition parameter is set；
Pulse current of PD waveform-time serieses collection is carried out with the acquisition parameter, based on ultra broadband detection technique Step；
Width when rising edge is extracted from the pulse current of PD waveform, and width-seasonal effect in time series step when obtaining rising edge Suddenly；
Width-phase sequence when width-time serieses during the rising edge are converted into into rising edge, and carry out width-phase place during rising edge The step of sequence spectrogram shows.
2. width-phase place spectrogram building method during pulse current of PD waveform rising edge according to claim 1, it is special Levy and be, also include：
The step of width-time serieses when the pulse current of PD waveform-time serieses and rising edge are stored.
3. width-phase place spectrogram building method during pulse current of PD waveform rising edge according to claim 1, it is special Levy and be, described width is specially during extraction rising edge from the pulse current of PD waveform：
t r p = t A a % - t A b %
Wherein, trpFor pulse current waveform rising edge when width,For rising edge a%ApeakLocate the corresponding time,For rising edge B%ApeakLocate corresponding time, ApeakFor pulse current waveform peak value, a ＞ b.
4. width-phase place spectrogram building method during pulse current of PD waveform rising edge according to claim 3, it is special Levy and be, a and b difference values are 90 and 10.
5. width-phase place spectrogram constructing apparatus during a kind of pulse current of PD waveform rising edge, it is characterised in that include：
Setup module, for arranging acquisition parameter；
Acquisition module, for carry out with the acquisition parameter, based on ultra broadband detection technique pulse current of PD waveform-when Between sequence acquisition；
Extraction module, width during for extracting rising edge from the pulse current of PD waveform, and width when obtaining rising edge- Time serieses；
Spectrogram generation display module, width-phase sequence during for width-time serieses during the rising edge to be converted into into rising edge, And carry out width during rising edge-phase sequence spectrogram and show.
6. width-phase place spectrogram constructing apparatus during pulse current of PD waveform rising edge according to claim 5, it is special Levy and be, also include：
Memory module, for carrying out to width-time serieses when the pulse current of PD waveform-time serieses and rising edge Storage.
7. width-phase place spectrogram constructing apparatus during pulse current of PD waveform rising edge according to claim 5, it is special Levy and be, in the extraction module, width is specially when rising edge is extracted from the pulse current of PD waveform：
t r p = t A a % - t A b %
Wherein, trpFor pulse current waveform rising edge when width,For rising edge a%ApeakLocate the corresponding time,For rising edge B%ApeakLocate corresponding time, ApeakFor pulse current waveform peak value, a ＞ b.
8. width-phase place spectrogram constructing apparatus during pulse current of PD waveform rising edge according to claim 7, it is special Levy and be, a and b difference values are 90 and 10.
9. a kind of based on width-phase place spectrogram during arbitrary described pulse current of PD waveform rising edge in claim 1-4 Building method realizes discharge source mirror method for distinguishing, it is characterised in that include：
Width-phase sequence spectrogram when obtaining rising edge；
Partial Discharge Sources are gone out according to width during the rising edge-phase sequence mass spectrum database, and judges whether interference source.
CN201611198132.5A 2016-12-22 2016-12-22 Pulse current waveform rising edge time width-phase spectrogram building method and device Active CN106610466B (en)

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CN116996199A (en) * 2023-09-26 2023-11-03 为准（北京）电子科技有限公司 UWB signal rising edge detection method, device, electronic equipment and storage medium

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CN116996199B (en) * 2023-09-26 2023-12-01 为准（北京）电子科技有限公司 UWB signal rising edge detection method, device, electronic equipment and storage medium

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