CN106066437B - A kind of on-line monitoring device of metallic oxide arrester and its monitoring method - Google Patents
A kind of on-line monitoring device of metallic oxide arrester and its monitoring method Download PDFInfo
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- CN106066437B CN106066437B CN201610539054.4A CN201610539054A CN106066437B CN 106066437 B CN106066437 B CN 106066437B CN 201610539054 A CN201610539054 A CN 201610539054A CN 106066437 B CN106066437 B CN 106066437B
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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
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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Abstract
The invention discloses a kind of on-line monitoring device of metallic oxide arrester and its monitoring methods, including：Main control chip acquires the data acquisition module of leakage current signal and voltage signal, receives the data of data acquisition module and calculate the backstage algorithm processing module that current in resistance property is transmitted to main control chip, interconnects in the human-computer interaction component of main control chip；Data acquisition module includes：For measuring the voltage and current measurement module of the voltage at metal oxide arrester arrester both ends and the Leakage Current of metal oxide arrester arrester, the filter module for receiving the signal of voltage and current measurement module and being filtered, the signal for the module that accepts filter and the AD conversion module being AD converted.The present invention provides a kind of on-line monitoring device of metallic oxide arrester and its monitoring method, the present invention fully considers the influence that the harmonic wave in voltage extracts current in resistance property, it can be very good to reduce the interference for extracting current in resistance property due to harmonic voltage, improve the efficiency and accuracy of on-line monitoring.
Description
Technical field
The present invention relates to electrical equipment the field of test technology, especially a kind of on-line monitoring device of metallic oxide arrester
And its monitoring method.
Background technique
It is excellent that metal oxide arrester arrester (MOA) has that nonlinear characteristic is good, through-current capacity is big, protective value is superior etc.
Good characteristic is the main device of relay protection of power system.MOA works online adversely thermal damaged, transient state, humorous state overvoltage for a long time
The influence of the factors such as impact and internal humidity, accelerates the aging deterioration of metal oxide arrester arrester, leads to arrester
Damage finally makes arrester lose protective effect.Therefore being monitored to running arrester is that power system security is reliable
The important guarantee of operation.Domestic and international many research achievements point out, when MOA aging, internal wetted and bad insulation performance, leakage
Electric current will increase, and wherein resistive current component increases obvious, therefore current in resistance property is the important ginseng for monitoring arrester operating status
Amount.
Classical capacitive current compensation method cannot remove the harmonic component in capacity current, and such harmonic component can be mixed into
In current in resistance property, the current in resistance property of the algorithm is caused to generate error, to influence the extraction accuracy of current in resistance property, be easy to cause pair
The erroneous judgement of state of metal oxide lightning arrester.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide a kind of metal oxide arrester on-line monitorings
Device and its monitoring method, the present invention fully consider the influence that the harmonic wave in voltage extracts current in resistance property, can be very good to subtract
The small interference extracted due to harmonic voltage to current in resistance property improves the efficiency and accuracy of on-line monitoring.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of on-line monitoring device of metallic oxide arrester, including：Main control chip acquires leakage current signal and voltage
The data acquisition module of signal receives the data of data acquisition module and calculates the backstage that current in resistance property is transmitted to main control chip
Algorithm processing module is interconnected in the human-computer interaction component of main control chip；Data acquisition module includes：For measuring metal oxygen
The voltage and current measurement module of the leakage current of the voltage and metal oxide arrester at compound arrester both ends receives voltage
The signal of current measurement module and the filter module being filtered, the signal for the module that accepts filter and the AD being AD converted
Conversion module.
A kind of on-line monitoring device of metallic oxide arrester above-mentioned, human-computer interaction component composition have：It is connected to master control
The GPRS module of chip is connected to the PC machine of GPRS module, is connected to the display module of PC machine.
A kind of on-line monitoring device of metallic oxide arrester above-mentioned, backstage algorithm processing module include：Voltage signal
Read module, for carrying out the phase shifter of 90 ° of phase shifts to voltage signal, receiving and detecting the voltage signal that phase shifter transmitting comes
Waveshape detector, the FFT module of fft analysis is carried out for the voltage signal to reading, and leakage current read module is connected to electricity
The zero-crossing detector for pressing signal reading module, leakage current read module, is connected to FFT module and zero-crossing detector and calculates
G, C computing module of brilliant dielectric capacitance C and capacitance compensation coefficient G, are connected to the multiplication of waveshape detector and G, C computing module
Device is connected to the subtracter of multiplier and leakage current read module.
A kind of monitoring method of on-line monitoring device of metallic oxide arrester above-mentioned includes the following steps：
(1) the initial voltage u and initial leakage current i of metal oxide arrester are obtainedx；
(2) initial voltage signal is subjected to fft analysis, obtains fundamental voltage amplitude u1, 3 subharmonic voltage amplitude u3And
Frequency w；
(3) by initial voltage and initial leakage current by zero-crossing detector, finding initial voltage is that zero moment is corresponding
Leakage current ix(t0)；
(4) by step 2,3 obtained fundamental voltage amplitude u1, 3 subharmonic voltage amplitude u3, frequency w, leakage current ix
(t0) bring formula (1) into and obtain brilliant dielectric capacitance C,
(5) by step 2,4 obtained fundamental voltage amplitude u1, 3 subharmonic voltage amplitude u3, frequency w, brilliant dielectric capacitance C
It brings formula (2) into and obtains capacitance compensation coefficient G,
(6) voltage by initial voltage signal by 90 ° of phase shifter phase shift counterclockwise, after phase shift is obtained by waveforms detection
usf；
(7) by step 5,6 obtained capacitance compensation coefficient G, voltage usfIt is multiplied by multiplier；
(8) by initial leakage current i acquired in step 1xAnd the obtained result of step 7 is subtracted each other by subtracter,
Obtain resistive current component iR；
(9) by the obtained resistive current component i of step 8RIt is uploaded to main control chip, by main control chip by data transmission
To display module and GPRS module；
(10) GPRS module is by the obtained data transmission of step 9 to PC machine.
The invention has the beneficial effects that：The present invention provides a kind of on-line monitoring device of metallic oxide arrester and its prison
The on-line real time monitoring to metal oxide arrester may be implemented in survey method, while method of the invention considers harmonic wave electricity
The influence to capacitive current compensation method is pressed, can be very good to reduce the interference for extracting current in resistance property due to harmonic voltage, is improved
The accuracy extracted, thus reduce the erroneous judgement as caused by harmonic wave interference to metal oxide arrester actual conditions, dress
It is simple to set structural principle, method simple possible has very high practical value, save the cost, economical and efficient in actual monitoring.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of embodiment of backstage algorithm processing module of the present invention；
Fig. 3 is the equivalent model figure of an embodiment of the present invention；
Fig. 4 is that the present invention extracts current in resistance property and practical current in resistance property contrast effect figure；
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
A kind of on-line monitoring device of metallic oxide arrester, including：Main control chip acquires leakage current signal and voltage
The data acquisition module of signal receives the data of data acquisition module and calculates the backstage that current in resistance property is transmitted to main control chip
Algorithm processing module is interconnected in the human-computer interaction component of main control chip；Data acquisition module includes：For measuring metal oxygen
The voltage and current measurement module of the leakage current of the voltage and metal oxide arrester at compound arrester both ends receives voltage
The signal of current measurement module and the filter module being filtered, the signal for the module that accepts filter and the AD being AD converted
Conversion module.
Human-computer interaction component composition has：It is connected to the GPRS module of main control chip, is connected to the PC machine of GPRS module, is connected
In the display module of PC machine.
Backstage algorithm processing module includes：Voltage signal read module, for carrying out the phase shift of 90 ° of phase shifts to voltage signal
Device receives and detects the waveshape detector for the voltage signal that phase shifter transmitting comes, for carrying out FFT points to the voltage signal of reading
The FFT module of analysis, leakage current read module are connected to the zero passage inspection of voltage signal read module, leakage current read module
Device is surveyed, FFT module and zero-crossing detector is connected to and G, the C for calculating brilliant dielectric capacitance C and capacitance compensation coefficient G calculates mould
Block is connected to the multiplier of waveshape detector and G, C computing module, is connected to the subtraction of multiplier and leakage current read module
Device.The operating procedure of backstage algorithm processing module is：First pass through voltage and current read module read main control chip in voltage with
And leakage current, then fft analysis is carried out by voltage signal of the FFT module to reading, then by zero-crossing detector to reading
Voltage, leakage current carry out the i that zero passage detection obtainsx(t0)、w、u1、u3, the obtained i of G, C modulex(t0)、w、u1、u3It calculates
Brilliant dielectric capacitance C, capacitance compensation coefficient G；Phase shifter carries out 90 ° of phase shifts to voltage signal, after waveshape detector detects phase shift
Voltage after phase shift is multiplied by voltage signal using multiplier with G；Using subtracter by leakage current and phase shifter acquired results
Subtract each other, to obtain current in resistance property.
Method of the invention considers influence of the harmonic voltage to capacitive current compensation method, can be very good to reduce due to humorous
The interference that wave voltage extracts current in resistance property improves the accuracy of extraction, to reduce as caused by harmonic wave interference to gold
Belong to the erroneous judgement of Oxide Arrester actual conditions；The monitoring method of on-line monitoring device of metallic oxide arrester includes following step
Suddenly：
(1) the initial voltage u and initial leakage current i of metal oxide arrester are obtainedx；
(2) initial voltage signal is subjected to fft analysis, obtains fundamental voltage amplitude u1, 3 subharmonic voltage amplitude u3And
Frequency w；
(3) by initial voltage and initial leakage current by zero-crossing detector, finding initial voltage is that zero moment is corresponding
Leakage current ix(t0)；
(4) by step 2,3 obtained fundamental voltage amplitude u1, 3 subharmonic voltage amplitude u3, frequency w, leakage current ix
(t0) bring formula (1) into and obtain brilliant dielectric capacitance C,
(5) by step 2,4 obtained fundamental voltage amplitude u1, 3 subharmonic voltage amplitude u3, frequency w, brilliant dielectric capacitance C
It brings formula (2) into and obtains capacitance compensation coefficient G,
(6) voltage by initial voltage signal by 90 ° of phase shifter phase shift counterclockwise, after phase shift is obtained by waveforms detection
usf；
(7) by step 5,6 obtained capacitance compensation coefficient G, voltage usfIt is multiplied by multiplier；
(8) by initial leakage current i acquired in step 1xAnd the obtained result of step 7 is subtracted each other by subtracter,
Obtain resistive current component iR；
(9) by the obtained resistive current component i of step 8RIt is uploaded to main control chip, by main control chip by data transmission
To display module and GPRS module；
(10) GPRS module is by the obtained data transmission of step 9 to PC machine.
It should be noted that：Formula (1) (2) in the monitoring method of on-line monitoring device of metallic oxide arrester push away
The process of leading is：In normal work, the power current flowed through inside arrester is very small, at arrester for metal oxide arrester
In low current area.In low current area, MOA model be equivalent to can simplify it is as described in Figure 3 by capacitor and nonlinear resistance simultaneously
The model of connection.In Fig. 3, ixFor arrester initial leakage current, iRFor the current in resistance property that nonlinear resistance generates, icFor capacitor production
Raw capacity current, u are the voltage at arrester both ends.Arrester initial leakage current ixFor current in resistance property iRWith capacity current icIt
With.
Classical capacitive current compensation method principle is by initial leakage current ixIn capacitive current component icCompensation is fallen, from
And arrive current in resistance property iR, principle can with formula (3) indicate：
When capacitive current compensation falls, ix-GusfAs current in resistance property can obtain
iR=ix-Gusf (4)
If containing 3 subharmonic voltages in power grid, the voltage acted on MOA can be expressed as：
U=u1sin(wt)+u3sin(3wt) (5)
u1And u3The respectively amplitude of fundamental wave and 3 subharmonic.
Capacity current is：
Current in resistance property is：
iR=IR1sin wt+IR3sin 3wt (7)
IR1And IR3The respectively fundamental current of MOA current in resistance property and 3 subharmonic current amplitudes.
(5), (6), (7) are substituted into (3) formula, can be in the hope of penalty coefficient G：
At this point, the current in resistance property value under harmonic voltage can be obtained by formula (4),
Formula (9) is compared with formula (7), it is known that the harmonic voltage meeting after harmonic wave is added in network voltage, in power grid
Current in resistance property is had an impact, it is contemplated that shown in the penalty coefficient G such as formula (8) of harmonic voltage it can be seen that not only with fundamental voltage
In relation to also related to electric voltage frequency and 3 subharmonic voltage amplitudes.
In the voltage zero-cross at arrester both ends, the current in resistance property i of arrester is flowed throughRIt is zero, then flows through arrester
Total current ixIt is equal with the capacitive current component of arrester valve piece made of metallic oxide.In the voltage containing 3 subharmonic, full electricity
Flow ixIt can be expressed as：
It is located at the t0 moment, loading in the take shelter from the thunder network voltage instantaneous value at both ends of metal oxide is zero, at this time can be with voltage
It can be expressed from the next：
u(t0)=u1 sin wt0+u3 sin 3wt0=0 (11)
The further lightning-arrest total current i of the available metal oxide in voltage zero-crossx(t0) value：
ix(t0)=iR(t0)+wC(u1 cos wt0+3u3 cos 3wt0) (12)
The characteristics of according to when voltage zero-cross, by metal oxide arrester valve in the case of formula (12) available voltage zero-cross
The brilliant dielectric capacitance of on piece：
Since the brilliant dielectric appearance of MOA valve block can approximately think constant, it can be considered that formula (13) resulting capacitor
Value is the brilliant dielectric capacitance of MOA.
Bring formula (13) into (8) formula available penalty coefficient containing under voltage harmonic
And the current in resistance property value under harmonic voltage is acquired using formula (4).
Use effect contrast figure such as Fig. 4 institute of the obtained current in resistance property of method used in the present invention and practical current in resistance property
Show.Fig. 4 shows that the practical current in resistance property of the extracted current in resistance property of the present invention and metal oxide arrester has consistent well
Property, illustrate that the on-line monitoring to metal oxide arrester can be well realized in this method.It is available by analysis chart 4,
The total current and current in resistance property numerical value of metal oxide arrester are relatively stable, and waveform has periodicity and symmetry, meet
The practical operation situation of MOA.The current in resistance property waveform diagram major part region that practical current in resistance property and context of methods in Fig. 4 extract
It is more consistent, there is lesser shake in the current waveform that the current over-zero moment extracts herein, it may be possible to due to containing in network voltage
The influence for the therein harmonic wave for thering are the nonlinear elements of a small amount of higher hamonic wave and metal oxide arrester itself to generate,
The present invention has ignored the influence of the lesser Electric Network Higher Harmonic of quantity to simplify the calculation, but total resistive curve conformity is higher,
Meet the needs of actual monitoring process.
The present invention provides a kind of on-line monitoring device of metallic oxide arrester and its monitoring method, may be implemented to metal
The on-line real time monitoring of Oxide Arrester, while method of the invention considers harmonic voltage to the shadow of capacitive current compensation method
It rings, can be very good to reduce the interference for extracting current in resistance property due to harmonic voltage, improve the accuracy of extraction, to reduce
To the erroneous judgement of metal oxide arrester actual conditions as caused by harmonic wave interference, apparatus structure principle is simple, and method is simple
It is feasible, there is very high practical value, save the cost, economical and efficient in actual monitoring.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the above embodiments do not limit the invention in any form, all obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.
Claims (2)
1. a kind of on-line monitoring device of metallic oxide arrester, which is characterized in that including：Main control chip acquires leakage current
The data acquisition module of signal and voltage signal, receives the data of above-mentioned data acquisition module and calculates current in resistance property and be transmitted to
The backstage algorithm processing module of above-mentioned main control chip is interconnected in the human-computer interaction component of above-mentioned main control chip；Above-mentioned data
Acquisition module includes：For measuring the voltage at metal oxide arrester both ends and the leakage current of metal oxide arrester
Voltage and current measurement module, the filter module for receiving the signal of above-mentioned voltage and current measurement module and being filtered connects
The AD conversion module receiving the signal of above-mentioned filter module and being AD converted；Above-mentioned human-computer interaction component composition has：It is connected to
The GPRS module for stating main control chip is connected to the PC machine of above-mentioned GPRS module, is connected to the display module of above-mentioned PC machine；After above-mentioned
Platform algorithm processing module includes：Voltage signal read module receives simultaneously for carrying out the phase shifter of 90 ° of phase shifts to voltage signal
The waveshape detector for detecting the voltage signal that above-mentioned phase shifter transmitting comes, for carrying out fft analysis to the voltage signal of reading
FFT module, leakage current read module are connected to the zero passage inspection of above-mentioned voltage signal read module, leakage current read module
Device is surveyed, above-mentioned FFT module and zero-crossing detector is connected to and G, the C for calculating brilliant dielectric capacitance C and capacitance compensation coefficient G is calculated
Module is connected to the multiplier of above-mentioned waveshape detector and G, C computing module, is connected to above-mentioned multiplier and leakage current is read
The subtracter of module.
2. a kind of monitoring method of on-line monitoring device of metallic oxide arrester according to claim 1, feature exist
In including the following steps：
(1) the initial voltage u and initial leakage current i of metal oxide arrester are obtainedx；
(2) initial voltage signal is subjected to fft analysis, obtains fundamental voltage amplitude u1, 3 subharmonic voltage amplitude u3And frequency
w；
(3) by initial voltage and initial leakage current by zero-crossing detector, finding initial voltage is the corresponding leakage of zero moment
Electric current ix(t0)；
(4) by step 2,3 obtained fundamental voltage amplitude u1, 3 subharmonic voltage amplitude u3, frequency w, leakage current ix(t0) band
Enter formula (1) and obtain brilliant dielectric capacitance C,
(5) by step 2,4 obtained fundamental voltage amplitude u1, 3 subharmonic voltage amplitude u3, frequency w, crystalline substance dielectric capacitance C bring into
Formula (2) obtains capacitance compensation coefficient G,
(6) the voltage u by initial voltage signal by 90 ° of phase shifter phase shift counterclockwise, after phase shift is obtained by waveforms detectionsf；
(7) by step 5,6 obtained capacitance compensation coefficient G, voltage usfIt is multiplied by multiplier；
(8) by initial leakage current i acquired in step 1xAnd the obtained result of step 7 is subtracted each other by subtracter, is hindered
Property current component iR；
(9) by the obtained resistive current component i of step 8RIt is uploaded to main control chip, is transferred data to by main control chip aobvious
Show module and GPRS module；
(10) GPRS module is by the obtained data transmission of step 9 to PC machine.
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Cited By (1)
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|---|---|---|---|---|
| WO2022042826A1 (en) * | 2020-08-25 | 2022-03-03 | Hitachi Energy Switzerland Ag | A gas insulated surge arrester and a gas insulated surge arrester monitoring system |
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| CN105954632B (en) * | 2016-07-01 | 2019-02-19 | 国网江苏省电力公司宿迁供电公司 | A kind of Zinc-Oxide Arrester on-line monitoring and diagnostic method |
| CN106680648A (en) * | 2016-12-22 | 2017-05-17 | 唐恩(厦门)电气有限公司 | Lightning arrester's resistance current measuring system |
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| CN112034253B (en) * | 2020-09-21 | 2022-06-07 | 国网福建省电力有限公司 | MOA online monitoring method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201489070U (en) * | 2009-08-31 | 2010-05-26 | 北京华科兴盛电力工程技术有限公司 | Arrester detecting device |
| CN102621457A (en) * | 2012-03-13 | 2012-08-01 | 福建省电力有限公司莆田电业局 | On-line detection method of metal oxide arrester insulating property influencing factor |
| CN104330615A (en) * | 2014-10-31 | 2015-02-04 | 南京世都科技有限公司 | Multi-phase measuring device of lightning arrester and transformer based on FFT algorithm and method thereof |
| CN104820127A (en) * | 2015-05-20 | 2015-08-05 | 南京信息工程大学 | Metal oxide arrester resistance current extracting method and device |
| CN204945268U (en) * | 2015-08-21 | 2016-01-06 | 常州埃依琦科技有限公司 | Lightning arrester on-line monitoring circuit |
| KR20160057027A (en) * | 2014-11-12 | 2016-05-23 | 한국전기연구원 | Method for measuring degradation of metal oxide varistors using voltage-current characteristics and apparatus therefor |
| CN205958663U (en) * | 2016-07-08 | 2017-02-15 | 南京信息工程大学 | On -line monitoring device of metallic oxide arrester |
-
2016
- 2016-07-08 CN CN201610539054.4A patent/CN106066437B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201489070U (en) * | 2009-08-31 | 2010-05-26 | 北京华科兴盛电力工程技术有限公司 | Arrester detecting device |
| CN102621457A (en) * | 2012-03-13 | 2012-08-01 | 福建省电力有限公司莆田电业局 | On-line detection method of metal oxide arrester insulating property influencing factor |
| CN104330615A (en) * | 2014-10-31 | 2015-02-04 | 南京世都科技有限公司 | Multi-phase measuring device of lightning arrester and transformer based on FFT algorithm and method thereof |
| KR20160057027A (en) * | 2014-11-12 | 2016-05-23 | 한국전기연구원 | Method for measuring degradation of metal oxide varistors using voltage-current characteristics and apparatus therefor |
| CN104820127A (en) * | 2015-05-20 | 2015-08-05 | 南京信息工程大学 | Metal oxide arrester resistance current extracting method and device |
| CN204945268U (en) * | 2015-08-21 | 2016-01-06 | 常州埃依琦科技有限公司 | Lightning arrester on-line monitoring circuit |
| CN205958663U (en) * | 2016-07-08 | 2017-02-15 | 南京信息工程大学 | On -line monitoring device of metallic oxide arrester |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022042826A1 (en) * | 2020-08-25 | 2022-03-03 | Hitachi Energy Switzerland Ag | A gas insulated surge arrester and a gas insulated surge arrester monitoring system |
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