CN106610466B - Pulse current waveform rising edge time width-phase spectrogram building method and device - Google Patents
Pulse current waveform rising edge time width-phase spectrogram building method and device Download PDFInfo
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- CN106610466B CN106610466B CN201611198132.5A CN201611198132A CN106610466B CN 106610466 B CN106610466 B CN 106610466B CN 201611198132 A CN201611198132 A CN 201611198132A CN 106610466 B CN106610466 B CN 106610466B
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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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Abstract
The present invention relates to a kind of pulse current of PD waveform rising edge time width-phase spectrogram building method and device, the building method includes: the step of acquisition parameter is arranged；The step of pulse current of PD waveform-time series acquisition is carried out with the acquisition parameter, based on ultra wide band detection technique；Rising edge time width, and the step of obtaining rising edge time width-time series are extracted from the pulse current of PD waveform；Rising edge time width-phase sequence is converted by the rising edge time width-time series, and carries out the step of rising edge time width-phase sequence spectrogram is shown.Compared with prior art, the present invention have many advantages, such as it is simple, practical, richer shelf depreciation information can be obtained.
Description
Technical field
The present invention relates to the shelf depreciation information processing technologies, more particularly, to a kind of pulse current waveform rising edge time width-
Phase spectrogram building method and device.
Background technique
When carrying out Partial Discharge Detection to insulation of electrical installation (paper oil insulation, gas-insulated etc.), it is assumed that ideal
Under noise eliminating technology, based on the detection of partial discharge pulse's peak value-time (phase) sequence for there are (packets when more partial discharge sources
Containing two), system obtain partial discharge data by be random aliasing peak value-phase sequence (PRPD).Inside insulation of electrical installation
Existing Partial Discharge Sources are unknown, but under the stable operating condition of Partial Discharge Sources, the transmission path being made of detection system
It is determining.The pulse current time domain waveform that different discharge sources or signal interference source are formed on detection system circuit has larger
Difference, but only then cannot be distinguished by amplitude.It is widely used at present, traditional PRPD spectrogram has been not enough to show comprising more
Useful information is also not used to handle the operating condition in more partial discharge sources or stochastic pulse interference source.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is simple, practical, obtains
Obtain data volume pulse current waveform rising edge time width-phase spectrogram building method abundant and device.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of pulse current of PD waveform rising edge time width-phase spectrogram building method, comprising:
The step of acquisition parameter is set；
Pulse current of PD waveform-time series is carried out with the acquisition parameter, based on ultra wide band detection technique to adopt
The step of collection；
Rising edge time width is extracted from the pulse current of PD waveform, and obtains rising edge time width-time series
The step of；
Rising edge time width-phase sequence is converted by the rising edge time width-time series, and carries out rising edge time width-
The step of phase sequence spectrogram is shown.
Further include:
The step that the pulse current of PD waveform-time series and rising edge time width-time series are stored
Suddenly.
It is described that rising edge time width is extracted from the pulse current of PD waveform specifically:
Wherein, trpFor pulse current waveform rising edge time width,For rising edge a%ApeakLocate the corresponding time,For
Rising edge b%ApeakLocate corresponding time, ApeakFor pulse current waveform peak value, a > b.
The a and b difference value is 90 and 10.
A kind of pulse current of PD waveform rising edge time width-phase spectrogram constructing apparatus, comprising:
Setup module, for acquisition parameter to be arranged；
Acquisition module, for carrying out pulse current of PD wave with the acquisition parameter, based on ultra wide band detection technique
Shape-time series acquisition；
Extraction module for extracting rising edge time width from the pulse current of PD waveform, and obtains rising edge
Time width-time series；
Spectrogram generates display module, for converting rising edge time width-phase sequence for the rising edge time width-time series
Column, and carry out rising edge time width-phase sequence spectrogram and show.
Further include:
Memory module, for the pulse current of PD waveform-time series and rising edge time width-time series
It is stored.
In the extraction module, rising edge time width is extracted from the pulse current of PD waveform specifically:
Wherein, trpFor pulse current waveform rising edge time width,For rising edge a%ApeakLocate the corresponding time,For
Rising edge b%ApeakLocate corresponding time, ApeakFor pulse current waveform peak value, a > b.
The a and b difference value is 90 and 10.
One kind realizing discharge source based on above-mentioned pulse current of PD waveform rising edge time width-phase spectrogram building method
Reflect method for distinguishing, comprising:
Obtain rising edge time width-phase sequence spectrogram；
Go out Partial Discharge Sources according to the rising edge time width-phase sequence mass spectrum database, and judge whether there is interference source.
Compared with prior art, the invention has the following advantages:
(1) present invention devises pulse current of PD waveform rising edge time width-phase sequence spectrogram construction process,
Simply, practical；
(2) the rising edge time width-phase sequence spectrogram obtained by the method for the invention includes shape information abundant；
(3) rising edge of the invention time width-phase sequence spectrogram can be advantageously used in more partial discharge sources and disturbing pulse source
Analysis.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for the present invention；
Fig. 2 is the structural schematic diagram of apparatus of the present invention；
Fig. 3 is of the present invention based on ultra wide band detection technique acquisition pulse current waveform-time series schematic diagram；
Fig. 4 is that impulse waveform rising edge time width of the present invention extracts schematic diagram；
Fig. 5 is the schematic diagram that the method for the present invention is used for test result analysis.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Traditional phase-resolved partial discharge (PRPD) spectrogram has been not enough to show comprising more
Useful information is also not used to handle the operating condition in more partial discharge sources or stochastic pulse interference source.The present invention tries hard to from practical application
It sets out, existing PRPD spectrogram is overcome to lose the shortcoming compared with multi information, propose that a kind of pulse current of PD waveform rises
Along time width-phase spectrogram building method.As shown in Figure 1, the building method includes:
In step 101, acquisition parameter is set, carries out part with the acquisition parameter of setting, based on ultra wide band detection technique and puts
Electric pulse current waveform-time series acquisition；
In step 102, pulse current of PD waveform-time series of acquisition is stored；
In step 103, from pulse current of PD waveform extract rising edge time width, and obtain rising edge time width-when
Between sequence；
In step 104, rising edge time width-phase sequence is converted by rising edge time width-time series, and carry out rising edge
Time width-phase sequence phase-resolved rise-time (PRRT) spectrogram is shown.Rising edge time width-phase that this method obtains
Bit sequence spectrogram can be compared analysis with traditional PRPD spectrogram.
It is illustrated in figure 3 and pulse current of PD waveform-time series acquisition is carried out based on ultra wide band detection technique
A kind of embodiment.In the embodiment, test test product and detection impedance ZmOne end connection, detects impedance ZmOther end ground connection, should
Detect impedance ZmResponsive bandwidth need to reach ns grades, the time domain waveform for the pulse current of PD that will not distort, and the embodiment
Used in the sample rate of ultra wide band high-speed pulse recording device need to be in 100MS/s or more, analog bandwidth 50M or more, note
The pulse current waveform of address book stored-time series P (tj) it is defined as follows:
Note: j --- j-th of pulse current；
tj--- j-th of pulse current waveform record time (μ s acquires the moment)；
K --- each impulse waveform is made of k point；
pi--- i-th point of pulse current waveform corresponding amplitude (mA/mV)；
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 detectedmCoupling capacitor low-voltage arm capacitor C can be serially connected in2With earth mat it
Between, detect impedance ZmAlso it can transform to the high frequencies low current detection sensor such as Rogowski coil, noninductive resistance.
In the step 103, rising edge time width is extracted from pulse current of PD waveform specifically:
Wherein, trpFor pulse current waveform rising edge time width,For rising edge a%ApeakLocate the corresponding time,For
Rising edge b%ApeakLocate corresponding time, a > b, ApeakFor pulse current waveform peak value, Apeak(j)=max (P (tj)),
In, j is j-th of pulse current；Max is the maximum value (mA/mV) of pulse current waveform.
The value of a and b can be set as needed, this is implemented in you, and a and b are taken as 90 and 10 respectively.
In the present invention, when the conversion of m- phase sequence is defined as:
Apeak(φj)=Apeak(tj)
φj={ (tj/20)-QZ[(tj/20)]}×360
Note: j --- j-th of pulse current；
φj--- j-th of pulse current waveform acquires corresponding phase (°)；
QZ --- round numbers.
As shown in Fig. 2, the present embodiment also provides a kind of pulse current of PD waveform rising edge time width-phase spectrogram structure
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 for being arranged acquisition parameter；Acquisition module 202 is used for the acquisition parameter of setting, is based on ultra-wide
Band detection technique carries out pulse current of PD waveform-time series acquisition；Extraction module 203 is used for from partial discharge pulse
Rising edge time width is extracted in current waveform, and obtains rising edge time width-time series；Spectrogram generation display module 204 is used for will
Rising edge time width-time series is converted into rising edge time width-phase sequence, and carries out rising edge time width-phase sequence spectrogram exhibition
Show；Memory module 205 is for depositing pulse current of PD waveform-time series and rising edge time width-time series
Storage.
Above-mentioned pulse current of PD waveform rising edge time width-phase spectrogram building method can be used for realizing that discharge source is reflected
Not, go out Partial Discharge Sources according to rising edge time width-phase sequence mass spectrum database, and judge whether there is interference source.As Fig. 5 is shown
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 the PRRT spectrogram of neotectonics after flow processing as shown in Figure 1, it is compared with traditional PRPD, PRPD spectrogram
Amplitude distribution on cannot be distinguished whether there is 2 partial discharge pulse sources, but PRRT rising edge time width distribution on obviously deposit
In 2 kinds of clocks, a kind of rising edge time width distributed area of clock is [40,60] ns, and typical pulse shape is as shown in the figure
Time domain waveform 1, and the rising edge time width distributed area of another clock is [20,30] ns, and typical pulse shape is as schemed
Shown in time domain waveform 2.According to the rising edge time width distributed area of PRRT, classification has obtained 2 traditional PRPD_1 and PRPD_
2 spectrograms respectively represent two Partial Discharge Sources.
Claims (7)
1. a kind of pulse current of PD waveform rising edge time width-phase spectrogram building method characterized by comprising
The step of acquisition parameter is set；
Pulse current of PD waveform-time series acquisition is carried out with the acquisition parameter, based on ultra wide band detection technique
Step；
Rising edge time width is extracted from the pulse current of PD waveform, and obtains rising edge time width-time series step
Suddenly；
Rising edge time width-phase sequence is converted by the rising edge time width-time series, and carries out rising edge time width-phase
The step of sequence spectrogram is shown；
It is described that rising edge time width is extracted from the pulse current of PD waveform specifically:
Wherein, trpFor pulse current waveform rising edge time width,For rising edge a%ApeakLocate the corresponding time,For rising edge
B%ApeakLocate corresponding time, ApeakFor pulse current waveform peak value, a > b.
2. pulse current of PD waveform rising edge time width-phase spectrogram building method according to claim 1, special
Sign is, further includes:
The step of pulse current of PD waveform-time series and rising edge time width-time series are stored.
3. pulse current of PD waveform rising edge time width-phase spectrogram building method according to claim 1, special
Sign is that a and b difference value are 90 and 10.
4. a kind of pulse current of PD waveform rising edge time width-phase spectrogram constructing apparatus characterized by comprising
Setup module, for acquisition parameter to be arranged；
Acquisition module, for the acquisition parameter, based on ultra wide band detection technique carry out pulse current of PD waveform-when
Between sequence acquisition；
Extraction module for extracting rising edge time width from the pulse current of PD waveform, and obtains rising edge time width-
Time series；
Spectrogram generates display module, for converting rising edge time width-phase sequence for the rising edge time width-time series,
And it carries out rising edge time width-phase sequence spectrogram and shows；
In the extraction module, rising edge time width is extracted from the pulse current of PD waveform specifically:
Wherein, trpFor pulse current waveform rising edge time width,For rising edge a%ApeakLocate the corresponding time,For rising edge
B%ApeakLocate corresponding time, ApeakFor pulse current waveform peak value, a > b.
5. pulse current of PD waveform rising edge time width-phase spectrogram constructing apparatus according to claim 4, special
Sign is, further includes:
Memory module, for being carried out to the pulse current of PD waveform-time series and rising edge time width-time series
Storage.
6. pulse current of PD waveform rising edge time width-phase spectrogram constructing apparatus according to claim 4, special
Sign is that a and b difference value are 90 and 10.
7. one kind is based on pulse current of PD waveform rising edge time width-phase spectrogram as claimed in any one of claims 1-3
Building method realizes discharge source mirror method for distinguishing characterized by comprising
Obtain rising edge time width-phase sequence spectrogram；
Go out Partial Discharge Sources according to the rising edge time width-phase sequence mass spectrum database, and judge whether there is interference source.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002090412A (en) * | 2000-09-12 | 2002-03-27 | Sumitomo Electric Ind Ltd | Partial-discharge measuring apparatus |
| CN201628754U (en) * | 2010-02-08 | 2010-11-10 | 湖北省电力试验研究院 | Wideband partial discharge detection device for power equipment |
| CN102262204A (en) * | 2011-06-10 | 2011-11-30 | 河南电力试验研究院 | Local discharge detection system applicable to detection of phase-resolved partial discharge pattern (PRPD) and time-resolved partial discharge pattern (TRPD) |
| CN102854445A (en) * | 2012-10-18 | 2013-01-02 | 上海市电力公司 | Method for extracting waveform feature of local discharge pulse current |
-
2016
- 2016-12-22 CN CN201611198132.5A patent/CN106610466B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002090412A (en) * | 2000-09-12 | 2002-03-27 | Sumitomo Electric Ind Ltd | Partial-discharge measuring apparatus |
| CN201628754U (en) * | 2010-02-08 | 2010-11-10 | 湖北省电力试验研究院 | Wideband partial discharge detection device for power equipment |
| CN102262204A (en) * | 2011-06-10 | 2011-11-30 | 河南电力试验研究院 | Local discharge detection system applicable to detection of phase-resolved partial discharge pattern (PRPD) and time-resolved partial discharge pattern (TRPD) |
| CN102854445A (en) * | 2012-10-18 | 2013-01-02 | 上海市电力公司 | Method for extracting waveform feature of local discharge pulse current |
Non-Patent Citations (1)
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| 基于波形非线性映射的多局部放电脉冲群快速分类;司文荣 等;《电工技术学报》;20090326;第24卷(第3期);第217-220页 |
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