CN100547417C - Utilize the method for laser telemetry high-tension insulator null value - Google Patents
Utilize the method for laser telemetry high-tension insulator null value Download PDFInfo
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- CN100547417C CN100547417C CNB2006101248086A CN200610124808A CN100547417C CN 100547417 C CN100547417 C CN 100547417C CN B2006101248086 A CNB2006101248086 A CN B2006101248086A CN 200610124808 A CN200610124808 A CN 200610124808A CN 100547417 C CN100547417 C CN 100547417C
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Abstract
The present invention relates to a kind of method of utilizing laser telemetry high-tension insulator null value, be made of semiconductor laser light source and polarization optics system, optics analyzer and photodetector, signal processing circuit and computer system, its concrete steps are: first step: produce a kind of polarization laser by semiconductor laser light source and polarization optics system and shine scanning insulator; Second step: polarization laser produces by scanning insulator and diffuses, and detects by the optics analyzer to diffuse and analyzing, and the light after the analyzing is mapped to photodetector induction light intensity again; Third step: photodetector is sensed and is converted thereof into electric signal after the light intensity and deliver to signal processing circuit and be processed into data; The 4th step: the data after the processing are reached a conclusion by computer system analysis.Because the present invention utilizes laser far-distance to detect the null value of high-tension insulator, makes the present invention have the system measurement method novelty, safety, non-contact measurement, characteristics such as efficient height.
Description
Technical field
The invention belongs to a kind of high-voltage transmission line insulator live detection method, particularly a kind of method of utilizing laser telemetry high-tension insulator null value.
Background technology
High-voltage transmission line insulator live detects, and is the problem that the insider pays much attention to and concentrates on studies always.Because the singularity of line insulator installation site and the harshness of testing environment never have charged accurately and reliably quantitative detecting method up to now.
The method of domestic and international charged detection insulator breakdown mainly contains following several:
1 spark fork method: be the most frequently used detection method at present, this method is to contact with insulator according to the spark fork whether producing discharges judges the insulator quality.
2 bead electric discharges: be detection method commonly used at present.This method is that the distance when producing discharge by the bead of measuring the insulator two ends judges that the voltage of insulator distributes, thereby judges whether tested insulator is normal.This method will frequently be adjusted the bead distance, and False Rate is bigger.
3 thermal infrared imager methods: be present more advanced detection method.It is to utilize the thermal effect principle of insulator surface to carry out charged detection.This method is very effective to the pollution proof insulator that scribbles semi-conducting glaze.Because during this type of insulator charged charging operation, the surface current of normal insulation is bigger, temperature rise is higher, and the surface temperature of inferior insulator is easy to identification than the sub low good several years of normal insulation with thermal infrared imager.But for the porcelain insulator of glass insulator or common glaze, its normal surface temperature only differs about 1 ℃ than inferior insulator surface temperature, under the weather conditions and site environment of complexity, measures and difficulty, and precision is difficult to guarantee.
4 insulation resistance methods: be advanced at present detection method.It is after recording the Leakage Current at the insulator two ends of flowing through by current sensor, in the mode with wireless telecommunications measurement result to be transferred to the information processing centre information of carrying out and to focus on, thereby realizes the remote measurement to insulator.The significant deficiency that this method exists is to install a cover pick-up unit on each insulator string, cost too high user in actual use be difficult to bear, and the Maintenance and Repair of device must just can be carried out in power failure.
5 laser dopper flowmeter vibratory drilling methods are to utilize the centre of oscillation frequency and just often different characteristics of the insulator that ftractures, by external force as knocking iron tower or with ultrasound wave that ultrasonic generator produced, aim at tested insulator or aim at tested insulator with the parabolic type catoptron with lasing light emitter, to evoke the microvibration of insulator, the tested insulator of laser alignment that then the laser dopper flowmeter instrument is sent, according to analysis to the frequency spectrum of the signal that reflects, thereby obtain the centre of oscillation frequency values of this insulator, judge the quality of this insulator in view of the above.But because this instrument detects invalid problem and bulky, heavy to uncracked insulator, use and keep in repair shortcomings such as complexity, cost height, limited its scope of application.
6 ultrasonic Method for Measuring: be utilization sound-electric transducer, the sound wave that sends when surveying inferior insulator generation shelf depreciation and ultrasound wave are determined position inferior.It is under powerful high-voltage electromagnetic field, and difference deterioration office discharge signal acquires a certain degree of difficulty.
In sum, we as can be seen the whole bag of tricks have his own strong points, all have certain application limitation.
Summary of the invention
The purpose of this invention is to provide a kind of operating personnel need not connect insulator, can be used for high-voltage transmission line insulator live at a distance and detect, and draw the method for utilizing laser telemetry high-tension insulator null value of measurement result, to overcome above-mentioned deficiency.
To achieve these goals, the present invention is made of semiconductor laser light source and polarization optics system, optics analyzer and photodetector, signal processing circuit and computer system, and its concrete steps are:
First step: produce a kind of polarization laser by semiconductor laser light source and polarization optics system and shine scanning insulator;
Second step: polarization laser produces by scanning insulator and diffuses, and detects by the optics analyzer to diffuse and analyzing, and the light after the analyzing is mapped to photodetector induction light intensity again;
Third step: photodetector is sensed and is converted thereof into electric signal after the light intensity and deliver to signal processing circuit and be processed into data;
The 4th step: the data after the processing are reached a conclusion by computer system analysis.
Confirmed that at present there is electromagnetic field in insulator around it under electriferous state, the electromagnetic field of this variation is influential to the polarization state of laser.Laser by semiconductor laser output becomes the polarized light angled with optical axis behind the polarizer, this light enters electromagnetic field its polarisation of light angle, back of coming out and will change, and different electromagnetic intensities changes different to the polarisation of light angle.The present invention just is being based on laser polarization state and designed by the influence of electromagnetic field.
Because the present invention utilizes laser far-distance to detect the null value of high-tension insulator, makes the present invention have the system measurement method novelty, safety, non-contact measurement, characteristics such as efficient height.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 sets up theory diagram for database in the embodiment of the invention computer system.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention drives radiating circuit, optical polariser, optics analyzer, photodetector, signal processing circuit and computer system by pulse laser and constitutes (see figure 1), wherein
Pulse laser drives radiating circuit and optical polariser (semiconductor laser light source and polarization optics system): the optical maser wavelength of semiconductor laser belongs to visible-range, has the very little angle of divergence simultaneously, suitable cloudy day or dusk, the measurement under the weather conditions such as evening.Pulse laser drives the employing of radiating circuit, can get rid of external interference.Utilize optical polariser, semiconductor laser is become linearly polarized light, improve skewness sensitivity.
Optics analyzer and photodetector: utilize the optics analyzer that the laser of launching back from insulator is carried out analyzing, the drift angle when noting through largest light intensity.The faint pulsed optical signals that photodetector will be sensed becomes electric signal, handles for signal processing circuit.
Signal processing circuit:,, after absolute value circuit is handled, be transformed into digital signal input computer system and carry out data acquisition through demodulator circuit with the electric weight after the photodetector conversion.
Computer system: the drift angle that measures is write down and stored, to the measurement result analyzing and processing, set up database for computing machine, and make diagnostic result.
Principle of work of the present invention is: semiconductor laser light source and polarization optics system generation polarization state laser by specific wavelength scan charged normal insulation, adopt the skewness laser of highly sensitive optics analyzing and photodetector induction reflected back, and note polarization angle when sensing maximum reflection skewness laser intensity, export to computer system after electric weight after signal processing circuit is changed photodetector is handled, utilize every grade of skewness family curve of computer drawing normal insulation substring light; Then, polarization state laser scans charged " suspicious " insulator, utilizes same principle to draw out every grade of skewness family curve to light of " suspicious " insulator chain; By comparing the feature of two class curves,, judge the various situations of insulator at last according to the relation of both drift angles.
When the not charged insulator full skirt of laser scanning, no matter analyzing spot is at that, and the polarization angle of its laser does not change.After insulator charged, because the electromagnetic field difference around every grade of full skirt of insulator (electromagnetic field lines around the insulator full skirt presents incomplete saddle-shape), so its polarization angle to laser has different influences.If null value appears in certain one-level of insulator full skirt, so, electromagnetic field around the insulator full skirt of this moment just produces variations different when not having the zero resistance insulator full skirt to laser polarization state, by contrasting this variation, just can judge that problem has appearred in which grade of insulator full skirt.
The present invention's computer system before application need be set up database, and the method for building up of its database is: at first prepare one of the present invention, experimental transformer and control desk one cover, the normal a string (see figure 2) of pillar insulator (totally 6 grades).Its concrete steps are:
At first, utilize the present invention that every substring of the normal insulation substring that do not power up is made line scanning (scanning) from top to bottom, the polarization angle when system senses largest light intensity when noting laser scanning to every substring, and numbering;
Secondly, utilize the High-Voltage Experimentation transformer that normal insulator chain is pressurizeed, pressurization is respectively: 10kV, 20kV, 30kV from small to large.Polarization angle when system sensed largest light intensity when laser scanning was to every substring when noting every grade of high pressure, and numbering;
Once more, with the artificial short circuit of insulator chain one-level or two-stage wherein, artificial simulated field insulator null value situation then, is pressurizeed respectively to insulator chain, and pressurization sequence is identical during with short circuit not.Note corresponding polarization angle, and numbering;
According to above-mentioned steps repeatedly, and the different substring of short circuit, the record corresponding data;
At last,, power up but short circuit not, power up and the data of short circuit are input to computer system of the present invention and set up database, and data are showed with the characteristic form of skewness not powering up of being noted.
The present invention scans the gained data with polarization state laser to charged " suspicious " insulator in use, utilize the aforesaid principle identical to draw out the skewness family curve of every grade of " suspicious " insulator chain with setting up database, by to skewness characteristic analysis tentatively judge the situation of insulator, and with the database in this skewness family curve and the computer system relatively, analysis is obtained a result.
The content institute and this area professional and technical personnel's known prior art that are not described in detail in this instructions.
Claims (6)
1, a kind of method of utilizing laser telemetry high-tension insulator null value is made of semiconductor laser light source and polarization optics system, optics analyzer and photodetector, signal processing circuit and computer system, and its concrete steps are:
First step: produce a kind of polarization laser by semiconductor laser light source and polarization optics system and shine scanning insulator;
Second step: polarization laser produces by scanning insulator and diffuses, and detects by the optics analyzer to diffuse and analyzing, and the light after the analyzing is mapped to photodetector induction light intensity again;
Third step: photodetector is sensed and is converted thereof into electric signal after the light intensity and deliver to signal processing circuit and be processed into data;
The 4th step: the data after the processing are reached a conclusion by computer system analysis.
2, the method for utilizing laser telemetry high-tension insulator null value as claimed in claim 1 is characterized in that: semiconductor laser light source and polarization optics system adopt pulse laser to drive radiating circuit and optical polariser.
3, the method for utilizing laser telemetry high-tension insulator null value as claimed in claim 1, it is characterized in that: optics analyzer and photodetector are to utilize the optics analyzer that the laser of launching back from insulator is carried out analyzing, note the drift angle when seeing through largest light intensity, the faint pulsed optical signals that photodetector will be sensed becomes electric signal, handles for signal processing circuit.
4, the method for utilizing laser telemetry high-tension insulator null value as claimed in claim 1, it is characterized in that: signal processing circuit is with the electric weight after the photodetector conversion, through demodulator circuit, after absolute value circuit is handled, be transformed into digital signal input computer system and carry out data acquisition.
5, the method for utilizing laser telemetry high-tension insulator null value as claimed in claim 1, it is characterized in that: computer system is the drift angle record that will measure and stores, computer system is to database comparison, analyzing and processing in measurement result and the computer system, and makes diagnostic result.
6, the method for utilizing laser telemetry high-tension insulator null value as claimed in claim 5 is characterized in that: the establishment step of the database in the computer system is:
First step: utilize every substring to scan from top to bottom to the normal insulation substring that do not power up, the polarization angle when sensing largest light intensity when noting laser scanning to every substring, and number;
Second step: utilize high-tension transformer that normal insulator chain is pressurizeed, pressurize from small to large, the polarization angle when sensing largest light intensity when laser scanning is to every substring when noting every grade of high pressure, and numbering;
Third step: with the artificial short circuit of normal insulation substring one-level or two-stage wherein, artificial simulated field insulator null value situation then, is pressurizeed respectively to insulator chain, and pressurization sequence is identical during with short circuit not, notes corresponding polarization angle, and numbers;
The 4th step: with third step repeatedly, and the different substring of short circuit, write down corresponding polarization angle data;
The 5th step: with noted do not power up, power up but not short circuit, power up and the polarization angle data of short circuit are input to computer system and set up database.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101248086A CN100547417C (en) | 2006-10-19 | 2006-10-19 | Utilize the method for laser telemetry high-tension insulator null value |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101248086A CN100547417C (en) | 2006-10-19 | 2006-10-19 | Utilize the method for laser telemetry high-tension insulator null value |
Publications (2)
| Publication Number | Publication Date |
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| CN1936612A CN1936612A (en) | 2007-03-28 |
| CN100547417C true CN100547417C (en) | 2009-10-07 |
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| CNB2006101248086A Expired - Fee Related CN100547417C (en) | 2006-10-19 | 2006-10-19 | Utilize the method for laser telemetry high-tension insulator null value |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334437A (en) * | 2015-11-18 | 2016-02-17 | 国家电网公司 | Portable insulator zero-value overhead testing device |
| CN105334438A (en) * | 2015-11-18 | 2016-02-17 | 国家电网公司 | Zero value tester of voice digital display insulator |
| CN105467280A (en) * | 2015-11-18 | 2016-04-06 | 国家电网公司 | Insulator zero value comprehensive test device |
| CN106932698A (en) * | 2017-04-26 | 2017-07-07 | 三峡大学 | A kind of livewire work device of transmission line composite insulator defects detection |
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2006
- 2006-10-19 CN CNB2006101248086A patent/CN100547417C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 利用激光互感器测量高压输电线的电流. 郭仿军，郭建.激光杂志，第24卷第4期. 2003 |
| 利用激光互感器测量高压输电线的电流. 郭仿军，郭建.激光杂志，第24卷第4期. 2003 * |
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Granted publication date: 20091007 Termination date: 20111019 |