CN105403815A - Insulator live detection system and method based on wireless ad hoc network communication - Google Patents
Insulator live detection system and method based on wireless ad hoc network communication Download PDFInfo
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- CN105403815A CN105403815A CN201510708804.1A CN201510708804A CN105403815A CN 105403815 A CN105403815 A CN 105403815A CN 201510708804 A CN201510708804 A CN 201510708804A CN 105403815 A CN105403815 A CN 105403815A
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- insulator
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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
- G01R31/1245—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 of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
Abstract
The invention discloses an insulator live detection system and a method based on wireless ad hoc network communication, which belongs to the technical field of power equipment detection. Through the wireless ad hoc network communication technology, insulator string longitudinal electric field distribution is extracted; according to the insulator longitudinal electric field distribution, internal defects of the insulators are judged; and by using the wireless ad hoc network communication technology, the data are transmitted to a data receiving terminal of a ground surface worker, and the data are displayed in a mode such as a curve. Thus, whether internal defect fault exists in the insulator can be displayed intuitively, a transmission line fault insulator can be conveniently found, and reliability of power supply is improved.
Description
Technical field
The invention belongs to electric device maintenance technical field, be specifically related to a kind of insulator charged detection system based on wireless self-networking communication and method.
Background technology
Composite insulator is numerous due to the advantage such as lightweight, intensity is high, resistance to pollution flashover performance is strong, easy to maintenance, has broken the long-term dominant position of porcelain, glass insulator, and obtains in electric system and apply widely.According to the incomplete statistics of calendar year 2001, nationwide integrated power grid runs sum and has reached 1,600,000, and in about 2,900,000 year, usage quantity is only second to the U.S. and occupies the world the 2nd.Along with working time and the increase running quantity, the information that composite insulator breaks down also increases gradually, and according to statistics, the ratio shared by domestic 110kV circuit generation reason unknown flashover is 22% of failure rate, causes very large economic loss.
In composite insulator occurs in operational process during insulation defect, outward appearance be can't see, and can cause arcing fault, and serious situation occurs line-outage contingency.Therefore to reduce composite insulator damage accident, improve power supply reliability.The methods such as observation, ultrasonic Detection Method, infrared imaging method that provide in prior art are as insulator charged detection method, but, the equal existing defects of said method: observation, may because viewing angle is undesirable or filthy covering and can not being found, interior insulation defect more may because being missed without obvious barment tag, though therefore observation is very easy, very unreliable; Ultrasonic Detection Method, the method have highly sensitive, speed is fast, cost is low, the advantage such as simple to operate and safe and reliable, crannied insulator can be detected exactly, but it is inoperative to uncracked insulator, and due to ultrasound wave existence coupling itself, decay and ultrasonic transducer performance issue, scene of can only arriving is detected one by one; Infrared imaging method, the shortcoming of this method be the high and temperature survey of instrument cost be subject to sunlight, strong wind, moisture, environment temperature and some can cause the impact of the factors such as insulator surface temperature sharply changes.
For the defect of said method, devise electric field measurement method in prior art, the method can the interior insulation defect of on-line checkingi composite insulator, and instrument is comparatively simple, requires very low to external environments such as weather.Operating composite insulator, under normal condition, electric field intensity and electromotive force are smooth along the change curve of insulator axis.When insulator exists conductive defect, this place's current potential becomes a constant, therefore its electric field intensity will reduce suddenly, and Electric Field Distribution curve is also no longer smooth, but has distortion on a corresponding position, middle sagging, and two ends rise.The axial electric field distribution of therefore measuring composite insulator string can find out the interior insulation conduction fault of insulator.Electric field measurement method there has been shaping product, is specifically designed to the on-line checkingi of composite insulator, dry, filthy not serious time Detection results good, but it needs to ascend a height measurement, dangerous high, and filthy and the composite insulator Electric Field Distribution distortion of humidity is serious, be difficult to defect recognition.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of insulator charged detection system based on wireless self-networking communication and method, provides convenience, improve the object of power supply reliability to be reached for searching transmission line malfunction insulator.
A kind of insulator charged detection system based on wireless self-networking communication, this system comprises insulator charged detection instrument portable unit and data sink, and described insulator charged detection instrument is connected with described data sink by wireless self-networking communication mode;
Described insulator charged detection instrument portable unit comprises single-chip microcomputer, electric-field sensor, photoelectric sensor and data acquisition unit; Wherein,
Electric-field sensor: for gathering the longitudinal electric field data of insulator, passive filtering and differential amplification process being carried out to gathered longitudinal electric field data, and is sent in data acquisition unit;
Photoelectric sensor: trigger the insulator longitudinal electric field data that single-chip microcomputer receives current collection for sending signal;
Data acquisition unit: for according to the sampled data in each cycle, ask for the longitudinal electric field data effective value in each cycle, and be sent in single-chip microcomputer;
Single-chip microcomputer: for the smoothing filtering process of longitudinal electric field data effective value in each cycle that will receive, and by the mode that wireless self-networking communicates, the data after process are sent to data sink;
Described data sink: the longitudinal electric field data received are carried out curve fitting for adopting least square method, the longitudinal electric field data and curves of the curve after matching and acquired original is contrasted, obtain the maximum difference between two curves, and judge whether obtained maximum difference exceedes the threshold value of setting, if so, then tested interior insulator existing defects, need change or keep in repair, otherwise insulator is normal.
The detection method adopting the insulator charged detection system based on wireless self-networking communication to carry out, comprises the following steps:
Step 1, employing electric-field sensor gather the longitudinal electric field data of insulator, and carry out passive filtering and differential amplification process to gathered longitudinal electric field data;
Step 2, when electric-field sensor close to during insulator edge trigger photoelectric sensor, the insulator longitudinal electric field data gathered by current electric field sensor are sent to data acquisition unit;
Step 3, data acquisition unit, according to the sampled data in each cycle, are asked for the longitudinal electric field data effective value in each cycle, and are sent in single-chip microcomputer;
Data after process by the smoothing filtering process of longitudinal electric field data effective value in each cycle of reception, and are sent to data sink by the mode that wireless self-networking communicates by step 4, single-chip microcomputer;
Step 5, repeatedly perform step 1 to step 5, until all insulators of insulator chain all complete measurement;
Step 6, data sink adopt least square method to carry out curve fitting to the longitudinal electric field data received;
Step 7, the longitudinal electric field data and curves of the curve after matching and acquired original to be contrasted, obtain the maximum difference between two curves;
Step 8, judge whether obtained maximum difference exceedes the threshold value of setting, if so, then tested interior insulator existing defects, need change or keep in repair, otherwise insulator is normal.
The longitudinal electric field data effective value asking for each cycle described in step 3, formula is as follows:
Wherein, I
rMSrepresent longitudinal electric field data effective value, N represents the number of samples in one-period, I
nrepresent the n-th instantaneous longitudinal electric field sampled value.
Advantage of the present invention:
The present invention proposes a kind of insulator charged detection system based on wireless self-networking communication and method, compared with prior art, the distribution of insulator chain longitudinal electric field is extracted by the wireless self-networking communication technology, defect in insulator is judged according to the distribution of insulator longitudinal electric field, the wireless self-networking communication technology is utilized to transfer data to the data receiving terminal of surface personnel, data will show in modes such as curves, intuitively can show insulator and whether there is interior defect fault, providing conveniently for finding transmission line malfunction insulator, improve the reliability of power supply.
Accompanying drawing explanation
Fig. 1 is the insulator charged detection system structured flowchart based on wireless self-networking communication of an embodiment of the present invention;
Fig. 2 is the insulator charged detection method process flow diagram based on wireless self-networking communication of an embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, an embodiment of the present invention is described further.
In the embodiment of the present invention, as shown in Figure 1, based on the insulator charged detection system of wireless self-networking communication, this system comprises insulator charged detection instrument portable unit and data sink, and described insulator charged detection instrument is connected with described data sink by wireless self-networking communication mode; Described insulator charged detection instrument portable unit comprises single-chip microcomputer, electric-field sensor, photoelectric sensor and data acquisition unit;
In the embodiment of the present invention, single-chip microcomputer adopts Atmega8 model, photoelectric sensor adopts PS-R50Lkodenshi reflective sensor, electric-field sensor adopts two battery lead plates, and insulator charged detection instrument also comprises power supply, runs display device, wireless self-networking data transmit-receive port, clock circuit and LED light;
In the embodiment of the present invention, electric-field sensor, for gathering the longitudinal electric field data of insulator, carries out passive filtering and differential amplification process to gathered longitudinal electric field data, and is sent in data acquisition unit; Photoelectric sensor triggers for sending signal the insulator longitudinal electric field data that single-chip microcomputer receives current collection; Data acquisition unit is used for according to the sampled data in each cycle, asks for the longitudinal electric field data effective value in each cycle, and is sent in single-chip microcomputer; Single-chip microcomputer is used for the smoothing filtering process of longitudinal electric field data effective value in each cycle received, and by the mode that wireless self-networking communicates, the data after process is sent to data sink;
In the embodiment of the present invention, described data sink carries out curve fitting to the longitudinal electric field data received for adopting least square method, the longitudinal electric field data and curves of the curve after matching and acquired original is contrasted, obtain the maximum difference between two curves, and judge whether obtained maximum difference exceedes the threshold value of setting, if, then tested interior insulator existing defects, need change or keep in repair, otherwise insulator is normal;
In the embodiment of the present invention, data sink comprises insulator charged detection instrument analysis software and computing machine, the data that described computing machine and analysis software send to described data sink for the treatment of described insulator charged detection instrument, by Calculation results by Computer display out.
Adopt the detection method that the insulator charged detection system based on wireless self-networking communication is carried out, method flow diagram as shown in Figure 2, comprises the following steps:
Step 1, employing electric-field sensor gather the longitudinal electric field data of insulator, and carry out passive filtering and differential amplification process to gathered longitudinal electric field data;
In the embodiment of the present invention, by carrying out passive filtering and differential amplification process, by signal condition to gathering zone of reasonableness to gathered longitudinal electric field data;
Step 2, when electric-field sensor close to during insulator edge trigger photoelectric sensor, the insulator longitudinal electric field data gathered by current electric field sensor are sent to data acquisition unit;
In the embodiment of the present invention, electric-field sensor triggers photoelectric sensor close to during insulator edge, and the dynamo-electric field sensor of notice monolithic is in optimum position, and electric field data is measured in request;
Step 3, data acquisition unit, according to the sampled data in each cycle, are asked for the longitudinal electric field data effective value in each cycle, and are sent in single-chip microcomputer;
In the embodiment of the present invention, signal gathering unit utilizes CS5464 chip, and this built-in chip type signal effective value calculates, and can arrange acquisition channel gain factor, expands signal acquisition range and improves acquisition precision;
In the embodiment of the present invention, the described longitudinal electric field data effective value asking for each cycle, formula is as follows:
Wherein, I
rMSrepresent longitudinal electric field data effective value, N represents the number of samples in one-period, I
nrepresent the n-th instantaneous longitudinal electric field sampled value;
Data after process by the smoothing filtering process of longitudinal electric field data effective value in each cycle of reception, and are sent to data sink by the mode that wireless self-networking communicates by step 4, single-chip microcomputer;
In the embodiment of the present invention, single-chip microcomputer gathers the effective value data in 20 cycles, smoothing filtering process, reduces sampled probability by mistake, improves sampling accuracy rate;
Step 5, repeatedly perform step 1 to step 5, until all insulators of insulator chain all complete measurement;
Step 6, data sink adopt least square method to carry out curve fitting to the longitudinal electric field data received;
Step 7, the longitudinal electric field data and curves of the curve after matching and acquired original to be contrasted, obtain the maximum difference between two curves;
Step 8, judge whether obtained maximum difference exceedes the threshold value of setting, if so, then tested interior insulator existing defects, need change or keep in repair, otherwise insulator is normal.
In the embodiment of the present invention, least square method computing result and former image data being carried out contrast and does difference, corresponding interior insulator defect can be judged according to presetting threshold value; Insulator under normal circumstances electric field genesis analysis curve is smooth curve, occurs that the sub-defect of minor insulation can cause electric field curve to have larger aberration rate.
Claims (3)
1. the insulator charged detection system based on wireless self-networking communication, it is characterized in that, this system comprises insulator charged detection instrument portable unit and data sink, and described insulator charged detection instrument is connected with described data sink by wireless self-networking communication mode;
Described insulator charged detection instrument portable unit comprises single-chip microcomputer, electric-field sensor, photoelectric sensor and data acquisition unit; Wherein,
Electric-field sensor: for gathering the longitudinal electric field data of insulator, passive filtering and differential amplification process being carried out to gathered longitudinal electric field data, and is sent in data acquisition unit;
Photoelectric sensor: trigger the insulator longitudinal electric field data that single-chip microcomputer receives current collection for sending signal;
Data acquisition unit: for according to the sampled data in each cycle, ask for the longitudinal electric field data effective value in each cycle, and be sent in single-chip microcomputer;
Single-chip microcomputer: for the smoothing filtering process of longitudinal electric field data effective value in each cycle that will receive, and by the mode that wireless self-networking communicates, the data after process are sent to data sink;
Described data sink: the longitudinal electric field data received are carried out curve fitting for adopting least square method, the longitudinal electric field data and curves of the curve after matching and acquired original is contrasted, obtain the maximum difference between two curves, and judge whether obtained maximum difference exceedes the threshold value of setting, if so, then tested interior insulator existing defects, need change or keep in repair, otherwise insulator is normal.
2. adopt detection method of carrying out based on the insulator charged detection system of wireless self-networking communication according to claim 1, it is characterized in that, comprise the following steps:
Step 1, employing electric-field sensor gather the longitudinal electric field data of insulator, and carry out passive filtering and differential amplification process to gathered longitudinal electric field data;
Step 2, when electric-field sensor close to during insulator edge trigger photoelectric sensor, the insulator longitudinal electric field data gathered by current electric field sensor are sent to data acquisition unit;
Step 3, data acquisition unit, according to the sampled data in each cycle, are asked for the longitudinal electric field data effective value in each cycle, and are sent in single-chip microcomputer;
Data after process by the smoothing filtering process of longitudinal electric field data effective value in each cycle of reception, and are sent to data sink by the mode that wireless self-networking communicates by step 4, single-chip microcomputer;
Step 5, repeatedly perform step 1 to step 5, until all insulators of insulator chain all complete measurement;
Step 6, data sink adopt least square method to carry out curve fitting to the longitudinal electric field data received;
Step 7, the longitudinal electric field data and curves of the curve after matching and acquired original to be contrasted, obtain the maximum difference between two curves;
Step 8, judge whether obtained maximum difference exceedes the threshold value of setting, if so, then tested interior insulator existing defects, need change or keep in repair, otherwise insulator is normal.
3. detection method according to claim 2, is characterized in that, the longitudinal electric field data effective value asking for each cycle described in step 3, and formula is as follows:
Wherein, I
rMSrepresent longitudinal electric field data effective value, N represents the number of samples in one-period, I
nrepresent the n-th instantaneous longitudinal electric field sampled value.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954656A (en) * | 2016-05-25 | 2016-09-21 | 国网宁夏电力公司固原供电公司 | Electric field measurement based internal defect detector for insulators |
| CN106226665A (en) * | 2016-08-30 | 2016-12-14 | 武汉科迪奥电力科技有限公司 | High-voltage transmission line insulator distributed electric field detector and detecting system |
| CN106443213A (en) * | 2016-08-26 | 2017-02-22 | 北京华电新智科技有限公司 | Device used for live-line detection of defective three-dimensional electric field in high voltage insulator |
| CN112765842A (en) * | 2020-12-31 | 2021-05-07 | 西安理工大学 | Optimization design method for combined insulator voltage-sharing structure |
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| CN103630800A (en) * | 2013-12-05 | 2014-03-12 | 天津市申达通电力技术有限公司 | Live insulator detecting system, live insulator detector and handheld receiving terminal |
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Patent Citations (5)
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| CN201107368Y (en) * | 2007-09-17 | 2008-08-27 | 武汉力电科技有限公司 | High-pressure electrical insulator electrified detection system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954656A (en) * | 2016-05-25 | 2016-09-21 | 国网宁夏电力公司固原供电公司 | Electric field measurement based internal defect detector for insulators |
| CN106443213A (en) * | 2016-08-26 | 2017-02-22 | 北京华电新智科技有限公司 | Device used for live-line detection of defective three-dimensional electric field in high voltage insulator |
| CN106226665A (en) * | 2016-08-30 | 2016-12-14 | 武汉科迪奥电力科技有限公司 | High-voltage transmission line insulator distributed electric field detector and detecting system |
| CN112765842A (en) * | 2020-12-31 | 2021-05-07 | 西安理工大学 | Optimization design method for combined insulator voltage-sharing structure |
| CN112765842B (en) * | 2020-12-31 | 2024-05-07 | 西安理工大学 | Optimization design method for voltage equalizing structure of combined insulator |
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Application publication date: 20160316 |