CN108120908A - One kind is based on the defects of Leakage Current insulator detection device - Google Patents
One kind is based on the defects of Leakage Current insulator detection device Download PDFInfo
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- CN108120908A CN108120908A CN201810025468.4A CN201810025468A CN108120908A CN 108120908 A CN108120908 A CN 108120908A CN 201810025468 A CN201810025468 A CN 201810025468A CN 108120908 A CN108120908 A CN 108120908A
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- insulator
- leakage current
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- transmitted
- current sensor
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- 239000012212 insulator Substances 0.000 title claims abstract description 73
- 230000007547 defect Effects 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 22
- 230000010363 phase shift Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000003909 pattern recognition Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The defects of being based on Leakage Current the present invention relates to one kind insulator detection device, the device include insulator Leakage Current sensor and signal acquisition and processing apparatus；The insulator Leakage Current sensor is mounted on the steel cap of insulator, and the insulator Leakage Current sensor flows through the Leakage Current of insulator place insulator chain for gathering, and passes through shielded cable or be wirelessly transmitted to the signal acquisition and processing apparatus.Signal acquisition and processing apparatus includes wideband current sensor, high-pass filter, bandpass filter, phase shift and square wave conversion circuit, amplifier, data collecting card and microcontroller；Wherein, microcontroller is used for the processing of data and judges insulator situation.The present invention, which is reached by detecting insulator Leakage Current, to be judged defects of insulator and carries out remote transmission, realizes automatic decision insulator state.
Description
Technical field
The defects of being based on Leakage Current the present invention relates to one kind insulator detection device, it is defeated in high pressure especially with regard to one kind
That is applied in electric line field realizes the device to disordered insulator detection by using acquisition Leakage Current mode.
Background technology
The insulator of transmission line of electricity is for fixed conductor, it is made to keep the important component of electric property.In electric system
In operation, complicated adverse circumstances that long-term work is collectively formed in highfield, mechanical stress, filth and humiture etc.
In, the probability of failure is very big, the safe operation of serious threat electric system.In general defects of insulator mainly have with
Under several aspects：There is crack in interior insulator, insulator surface is damaged, insulation impedance reduces etc..Current many detection methods
It stills need to climb steel tower Site Detection, there is the problems such as measurement heavy workload, dangerous high.Therefore find a kind of economical, practical
Effective insulator on-line detection method is always power department urgent problem to be solved.
Insulator is usually made of glass or ceramics, and support conducting wire is played in overhead transmission line and prevents electric current from returning ground
Important function.When the variation of site environment humidity, pollution severity of insulators object excessive, covering ice for insulator, zero resistance insulator etc. because
When element causes the insulator leakage current to increase, a kind of new detection device need to be provided and accurately detected, judge insulation to reach
The purpose of sub- defect.
The content of the invention
In view of the above-mentioned problems, the defects of being based on Leakage Current the object of the present invention is to provide one kind insulator detection device,
The device, which is reached by detecting insulator Leakage Current, to be judged defects of insulator and carries out remote transmission, realizes automatic decision insulation
Sub- state.
To achieve the above object, the present invention takes following technical scheme：One kind is based on the defects of Leakage Current insulator and examines
Survey device, it is characterised in that：The device includes insulator Leakage Current sensor and signal acquisition and processing apparatus；The insulator
Leakage Current sensor is mounted on the steel cap of insulator, and the insulator Leakage Current sensor flows through the insulation for gathering
The Leakage Current of insulator chain where sub, and pass through shielded cable or be wirelessly transmitted to the signal acquisition and processing apparatus.
The signal acquisition and processing apparatus includes wideband current sensor, high-pass filter, bandpass filter, phase shift and side
Ripple conversion circuit, amplifier, data collecting card and microcontroller；The insulator Leakage Current sensor is electric by the leakage collected
An amplifier transfer is flowed through to the bandpass filter, is transmitted to after the bandpass filter is filtered described
Phase shift and square wave conversion circuit, by obtaining reference signal after the phase shift and square wave conversion circuit processing and being transmitted to the data
Capture card；The wideband current sensor is by the steel tower electric current of circuit where the insulator chain collected through the high-pass filter
After processing, it is transmitted to after another amplifier is amplified processing and obtains pulse signal, the pulse signal transmission to the number
According to capture card；The pulse signal received and reference signal are converted into being transmitted to after digital signal described by the data collecting card
In microcontroller.
Corona pulse statistical module is provided in the microcontroller, discharge mode forms module, pattern recognition module and knot
Fruit output module；The corona pulse statistical module is transmitted to institute after being counted the pulse signal received and reference signal
It states discharge mode and forms module, form discharge mode and be transmitted to the pattern recognition module, known by the pattern recognition module
The defects of not going out's insulator information, and it is transmitted to output module.
The microcontroller uses low-power consumption MSP430F149.
Using the frequency band of more than 2MHz as detection frequency band.
The present invention has the following advantages due to taking above technical scheme：1st, the present invention exceeds a tentering by record
The leakage current umber of pulse detection disordered insulator operating status of value, realizes automatic decision insulator state.When insulator occurs
During defect, show that the fundamental wave of Leakage Current and the amplitude of each harmonic increased dramatically, and the growth of triple-frequency harmonics is remote
Far more than the growth of fundamental wave and other each harmonics, therefore can be by monitoring triple-frequency harmonics frequency and strong within the unit interval
Degree.2nd, reasonable Arrangement Leakage Current harvester of the present invention, Leakage Current is gathered on the basis of insulator dielectric effect is not influenced.
Description of the drawings
Fig. 1 is the insulator Leakage Current sensor layout schematic diagram of the present invention；
Fig. 2 is the system structure diagram of the present invention.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1 and Figure 2, the present invention provides a kind of the defects of being based on Leakage Current insulator detection device, including absolutely
Edge Leakage Current sensor 1 and signal acquisition and processing apparatus.Insulator Leakage Current sensor 1 is mounted on the steel of insulator 2
On cap 3, insulator Leakage Current sensor 1 flows through the Leakage Current of the 2 place insulator chain of insulator for gathering, and passes through
Shielded cable is wirelessly transmitted to signal acquisition and processing apparatus.
In a preferred embodiment, signal acquisition and processing apparatus includes wideband current sensor, high-pass filter, band
Bandpass filter, phase shift and square wave conversion circuit, amplifier, data collecting card and microcontroller.Wherein, microcontroller is used for the place of data
It manages and judges insulator situation.Insulator Leakage Current sensor 1 is by the Leakage Current collected through an amplifier transfer to band
Bandpass filter is transmitted to phase shift and square wave conversion circuit after bandpass filter is filtered, and is converted by phase shift and square wave
Reference signal is obtained after processing of circuit and is transmitted to data collecting card.Wideband current sensor will be where the insulator chain that collected
The steel tower electric current of circuit is transmitted to after another amplifier is amplified processing after high pass filter, processes and obtains pulse signal,
The pulse signal transmission is to data collecting card.The pulse signal received and reference signal are converted into digital letter by data collecting card
It is transmitted to after number in microcontroller, defects of insulator identifying processing is carried out by microcontroller.
Corona pulse statistical module is provided in above-described embodiment, in microcontroller, discharge mode forms module, pattern-recognition
Module and output module.Corona pulse statistical module is transmitted to after being counted the pulse signal received and reference signal and puts
Power mode forms module, forms corresponding discharge mode, and is transmitted to pattern recognition module, is identified absolutely by pattern recognition module
The defects of edge information, and information output the defects of be transmitted to output module, will identify that by output module.
In the various embodiments described above, defects of insulator is carried out using pulse counting method and maximum leakage current method in microcontroller
Identifying processing：Pulse counting method and maximum leakage current method are the methods based on leakage current characteristic quantity.Pulse counting method be
In the given time, record the defects of bearing under operating voltage insulator and exceed the leakage current umber of pulse for presetting amplitude,
It can represent defects of insulator degree.Maximum leakage electric current characterizes the degree of the defects of insulator, it is exhausted as characterization defect
The characteristic value of edge operating status.
In the various embodiments described above, microcontroller uses low-power consumption MSP430F149.
In a preferred embodiment, insulator Leakage Current sensor 1 is a circle core-theaded type passive sensor, is adopted
Make electromagnetic induction element and electronic compensating with high permeability material, tool high-precision is than poor characteristic and general precision angular difference characteristic.
In the various embodiments described above, Leakage Current signal transfers conducting wire using double layer screen line, and wherein outer shield is most
Close to the iron head ground connection of the insulator 2 of steel tower, and internal layer shielding is grounded in detection device position.
In a preferred embodiment, since insulator current signal is very faint, and frequency band distribution is very wide.In order to have
Effect extracts pulse signal ingredient, is used as in the present embodiment using the frequency band of more than 2MHz and detects frequency band.
The various embodiments described above are merely to illustrate the present invention, and structure and size, installation position and the shape of each component are all can be with
It is varied from, on the basis of technical solution of the present invention, improvement and wait that all principles according to the present invention carry out individual part
With conversion, should not exclude outside protection scope of the present invention.
Claims (5)
1. one kind is based on the defects of Leakage Current insulator detection device, it is characterised in that：The device includes insulator leakage electricity
Flow sensor and signal acquisition and processing apparatus；The insulator Leakage Current sensor is mounted on the steel cap of insulator, described
Insulator Leakage Current sensor flows through the Leakage Current of insulator place insulator chain for gathering, and passes through shielded cable
Or it is wirelessly transmitted to the signal acquisition and processing apparatus.
2. a kind of the defects of being based on Leakage Current insulator detection device as described in claim 1, it is characterised in that：The letter
Number acquisition processing device includes wideband current sensor, high-pass filter, bandpass filter, phase shift and square wave conversion circuit, puts
Big device, data collecting card and microcontroller；The insulator Leakage Current sensor is by the Leakage Current collected through being put described in one
Big device is transmitted to the bandpass filter, and the phase shift is transmitted to after the bandpass filter is filtered and square wave turns
Circuit is changed, by obtaining reference signal after the phase shift and square wave conversion circuit processing and being transmitted to the data collecting card；It is described
Wideband current sensor after the high pass filter, processes, transmits the steel tower electric current of circuit where the insulator chain collected
Pulse signal is obtained after being amplified processing to another amplifier, the pulse signal transmission to the data collecting card；Institute
Data collecting card is stated to be converted into being transmitted in the microcontroller after digital signal by the pulse signal received and reference signal.
3. a kind of the defects of being based on Leakage Current insulator detection device as claimed in claim 2, it is characterised in that：The list
Corona pulse statistical module is provided in piece machine, discharge mode forms module, pattern recognition module and result output module；It is described
Corona pulse statistical module is transmitted to the discharge mode and is formed after being counted the pulse signal received and reference signal
Module forms discharge mode and is transmitted to the pattern recognition module, and lacking for insulator is identified by the pattern recognition module
Information is fallen into, and is transmitted to output module.
4. a kind of the defects of being based on Leakage Current insulator detection device as claimed in claim 2, it is characterised in that：The list
Piece machine uses low-power consumption MSP430F149.
5. such as a kind of the defects of being based on Leakage Current insulator detection device of claim 1-4 any one of them, feature exists
In：Using the frequency band of more than 2MHz as detection frequency band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810025468.4A CN108120908A (en) | 2018-01-11 | 2018-01-11 | One kind is based on the defects of Leakage Current insulator detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810025468.4A CN108120908A (en) | 2018-01-11 | 2018-01-11 | One kind is based on the defects of Leakage Current insulator detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108120908A true CN108120908A (en) | 2018-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810025468.4A Pending CN108120908A (en) | 2018-01-11 | 2018-01-11 | One kind is based on the defects of Leakage Current insulator detection device |
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| CN (1) | CN108120908A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308296A (en) * | 2020-04-16 | 2020-06-19 | 国网山西省电力公司电力科学研究院 | Method for evaluating state of valve plate of lightning arrester |
| CN114200239A (en) * | 2021-12-10 | 2022-03-18 | 清华大学 | Method for online monitoring failure of insulator monomer in insulator string in power system |
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|---|---|---|---|---|
| CN1782724A (en) * | 2005-10-10 | 2006-06-07 | 西安交通大学 | Synthetic insulator on-line detector based on pulse current method |
| CN102221641A (en) * | 2011-04-07 | 2011-10-19 | 北京交通大学 | On-line monitoring system for leakage current of high-voltage power transmission line insulator |
| CN102967805A (en) * | 2012-11-06 | 2013-03-13 | 南京能新电力高科实业有限公司 | Analysis meter and analysis method for online induction pulse signal of electric transmission line |
| CN103323710A (en) * | 2013-06-08 | 2013-09-25 | 安徽凯川电力保护设备有限公司 | Embedded type power grid operation on-line monitoring device |
| CN105242187A (en) * | 2015-11-09 | 2016-01-13 | 江苏省电力公司检修分公司 | Self-triggering power transmission line insulator pollution flashover early-warning device |
| CN208076652U (en) * | 2018-01-11 | 2018-11-09 | 国家电网公司 | Disordered insulator detection device based on Leakage Current |
-
2018
- 2018-01-11 CN CN201810025468.4A patent/CN108120908A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1782724A (en) * | 2005-10-10 | 2006-06-07 | 西安交通大学 | Synthetic insulator on-line detector based on pulse current method |
| CN102221641A (en) * | 2011-04-07 | 2011-10-19 | 北京交通大学 | On-line monitoring system for leakage current of high-voltage power transmission line insulator |
| CN102967805A (en) * | 2012-11-06 | 2013-03-13 | 南京能新电力高科实业有限公司 | Analysis meter and analysis method for online induction pulse signal of electric transmission line |
| CN103323710A (en) * | 2013-06-08 | 2013-09-25 | 安徽凯川电力保护设备有限公司 | Embedded type power grid operation on-line monitoring device |
| CN105242187A (en) * | 2015-11-09 | 2016-01-13 | 江苏省电力公司检修分公司 | Self-triggering power transmission line insulator pollution flashover early-warning device |
| CN208076652U (en) * | 2018-01-11 | 2018-11-09 | 国家电网公司 | Disordered insulator detection device based on Leakage Current |
Non-Patent Citations (3)
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| 施倩: "脉冲电流法检测不良绝缘子分辨率的研究", 《高电压技术》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308296A (en) * | 2020-04-16 | 2020-06-19 | 国网山西省电力公司电力科学研究院 | Method for evaluating state of valve plate of lightning arrester |
| CN111308296B (en) * | 2020-04-16 | 2021-05-11 | 国网山西省电力公司电力科学研究院 | Method for evaluating state of valve plate of lightning arrester |
| CN114200239A (en) * | 2021-12-10 | 2022-03-18 | 清华大学 | Method for online monitoring failure of insulator monomer in insulator string in power system |
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Effective date of registration: 20191008 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation Applicant after: Guo Wang Tibet Electric Power Company Limited Applicant after: Hebei Province Power Surveying Design & Research Institute Applicant after: Guo Wang goods and materials company limited Applicant after: Beijing Hualian Power Engineering Supervision Co., Ltd. Applicant after: China Electric Power Research Institute Co., Ltd. Applicant after: Electric Power Research Institute of State Grid Liaoning Electric Power Co., Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation Applicant before: Guo Wang Tibet Electric Power Company Limited Applicant before: Hebei Province Power Surveying Design & Research Institute Applicant before: Guo Wang goods and materials company limited Applicant before: Beijing Hualian Power Engineering Supervision Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180605 |