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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- 239000012212 insulator Substances 0.000 title claims abstract description 93
- 238000004891 communication Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 230000005684 electric field Effects 0.000 claims abstract description 84
- 230000007547 defect Effects 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000009499 grossing Methods 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 4
- 238000002307 isotope ratio mass spectrometry Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 10
- 238000009421 internal insulation Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000003331 infrared imaging Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
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 the technical field of power equipment detection, and particularly relates to a system and a method for detecting live insulator based on wireless ad hoc network communication.
Background
The composite insulator has the advantages of light weight, high strength, strong pollution flashover resistance, convenient maintenance and the like, breaks through the long-term dominance of porcelain and glass insulators, and is widely applied to power systems. According to the incomplete statistics of 2001, the total number of the national power grid operation reaches 160 ten thousand, about 290 ten thousand years, and the number of the used power grid is second to the United states and is 2 nd in the world. With the increase of the running time and the running quantity, the information of the composite insulator having faults is gradually increased, and according to statistics, the proportion of the unknown flashover of the domestic 110kV line is 22% of the fault rate, so that great economic loss is caused.
When the composite insulator has an internal insulation defect in the operation process, the appearance cannot be seen, so that flashover fault can be caused, and a disconnection accident can be caused in a serious case. Therefore, the damage accidents of the composite insulator are reduced, and the power supply reliability is improved. In the prior art, methods such as observation, ultrasonic detection, infrared imaging and the like are provided as the insulator electrification detection method, but the methods all have the following defects: the observation method can not be found due to an unsatisfactory observation angle or dirty coverage, and the internal insulation defect can be missed due to no obvious appearance characteristic, so the observation method is simple and convenient but unreliable; the ultrasonic detection method has the advantages of high sensitivity, high speed, low cost, simple operation, safety, reliability and the like, can accurately detect the insulator with the crack, but does not work on the insulator without the crack, and can only detect the insulator one by one on site due to the problems of coupling, attenuation and performance of an ultrasonic transducer of the ultrasonic wave; the infrared imaging method has the disadvantages that the cost of the instrument is high, and the temperature measurement is easily influenced by factors such as sunlight, strong wind, moisture, ambient temperature and the like which can cause the surface temperature of the insulator to change rapidly.
Aiming at the defects of the method, an electric field measurement method is designed in the prior art, the method can be used for detecting the internal insulation defect of the composite insulator on line, the used instruments are simple, and the requirements on external environments such as weather are very low. In the composite insulator in operation, the change curves of the electric field intensity and the electric potential along the axial direction of the insulator are smooth in a normal state. When the insulator has a conductivity defect, the potential at the position becomes a constant, so the electric field intensity is suddenly reduced, the electric field distribution curve is not smooth any more, but the corresponding position has distortion, the middle is sunken, and the two ends are raised. Therefore, the internal insulation conductivity fault of the insulator can be found by measuring the axial electric field distribution of the composite insulator string. The electric field measurement method has a formed product, is specially used for the online detection of the composite insulator, has good detection effect when the composite insulator is dry and dirty is not serious, but has the defects that the detection is required to be carried out by ascending a height, the danger is high, and the electric field distribution of the dirty and wet composite insulator is seriously distorted and is difficult to identify.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an insulator live detection system and method based on wireless ad hoc network communication, so as to achieve the purposes of providing convenience for searching for a fault insulator of a power transmission line and improving the power supply reliability.
An insulator live detection system based on wireless ad hoc network communication comprises an insulator live detector portable device and a data receiving terminal machine, wherein the insulator live detector is connected with the data receiving terminal machine in a wireless ad hoc network communication mode;
the portable device of the electrified insulator detector comprises a single chip microcomputer, an electric field sensor, a photoelectric sensor and a data acquisition unit; wherein,
an electric field sensor: the system comprises a data acquisition unit, a data processing unit and a data processing unit, wherein the data acquisition unit is used for acquiring longitudinal electric field data of an insulator, performing passive filtering and differential amplification processing on the acquired longitudinal electric field data and sending the data to the data acquisition unit;
a photoelectric sensor: the single chip microcomputer is used for sending a signal to trigger the single chip microcomputer to receive the currently acquired insulator longitudinal electric field data;
a data acquisition unit: the device is used for solving the effective value of the longitudinal electric field data of each period according to the sampling data in each period and sending the effective value to the single chip microcomputer;
a single chip microcomputer: the device is used for carrying out smoothing filtering processing on the received longitudinal electric field data effective value of each period and sending the processed data to a data receiving terminal machine in a wireless ad hoc network communication mode;
the data receiving terminal machine: the method is used for performing curve fitting on the received longitudinal electric field data by adopting a least square method, comparing the fitted curve with an originally acquired longitudinal electric field data curve to obtain a maximum difference value between the two curves, and judging whether the obtained maximum difference value exceeds a set threshold value, if so, the inside of the tested insulator has defects and needs to be replaced or maintained, otherwise, the insulator is normal.
The detection method which is carried out by adopting the insulator live detection system based on the wireless ad hoc network communication comprises the following steps:
step 1, adopting an electric field sensor to collect longitudinal electric field data of an insulator, and carrying out passive filtering and differential amplification processing on the collected longitudinal electric field data;
step 2, triggering the photoelectric sensor when the electric field sensor approaches the edge of the insulator, and sending the insulator longitudinal electric field data acquired by the current electric field sensor to a data acquisition unit;
step 3, the data acquisition unit calculates the effective value of the longitudinal electric field data of each period according to the sampling data in each period and sends the effective value to the singlechip;
step 4, the singlechip carries out smoothing filtering processing on the received longitudinal electric field data effective value of each period, and sends the processed data to a data receiving terminal machine in a wireless ad hoc network communication mode;
step 5, repeatedly executing the step 1 to the step 5 until all insulators of the insulator string are measured;
step 6, the data receiving terminal machine carries out curve fitting on the received longitudinal electric field data by adopting a least square method;
step 7, comparing the fitted curve with an originally acquired longitudinal electric field data curve to obtain the maximum difference value between the two curves;
and 8, judging whether the obtained maximum difference value exceeds a set threshold value, if so, judging that the interior of the tested insulator has defects and needs to be replaced or maintained, and otherwise, judging that the insulator is normal.
And 3, solving the effective value of the longitudinal electric field data in each period, wherein the formula is as follows:
wherein,IRMSrepresenting the effective value of longitudinal electric field data, N representing the number of samples in a period, InRepresenting the nth instantaneous longitudinal electric field sample value.
The invention has the advantages that:
compared with the prior art, the invention provides the insulator live-line detection system and method based on the wireless ad hoc network communication, the distribution of the longitudinal electric field of the insulator string is extracted through the wireless ad hoc network communication technology, the internal defect of the insulator is judged according to the distribution of the longitudinal electric field of the insulator, the data is transmitted to the data receiving terminal of ground workers by utilizing the wireless ad hoc network communication technology, the data is displayed in a curve mode and the like, whether the insulator has the internal defect fault or not can be visually displayed, convenience is provided for searching the fault insulator of the power transmission line, and the reliability of power supply is improved.
Drawings
Fig. 1 is a block diagram of a charged insulator detection system based on wireless ad hoc network communication according to an embodiment of the present invention;
fig. 2 is a flowchart of an insulator live-line detection method based on wireless ad hoc network communication according to an embodiment of the present invention.
Detailed Description
An embodiment of the present invention will be further described with reference to the accompanying drawings.
In the embodiment of the invention, as shown in fig. 1, the insulator live detection system based on wireless ad hoc network communication comprises a portable device of an insulator live detector and a data receiving terminal, wherein the insulator live detector is connected with the data receiving terminal in a wireless ad hoc network communication mode; the portable device of the electrified insulator detector comprises a single chip microcomputer, an electric field sensor, a photoelectric sensor and a data acquisition unit;
in the embodiment of the invention, the singlechip is of an Atmega8 model, the photoelectric sensor is a PS-R50Lkodenshi reflection sensor, the electric field sensor is two electrode plates, and the insulator electrified detector further comprises a power supply, an operation display device, a wireless ad hoc network data receiving and transmitting port, a clock circuit and an LED indicator light;
in the embodiment of the invention, the electric field sensor is used for collecting the longitudinal electric field data of the insulator, carrying out passive filtering and differential amplification processing on the collected longitudinal electric field data and sending the data to the data collection unit; the photoelectric sensor is used for sending a signal to trigger the single chip microcomputer to receive currently acquired insulator longitudinal electric field data; the data acquisition unit is used for solving the longitudinal electric field data effective value of each period according to the sampling data in each period and sending the effective value to the singlechip; the singlechip is used for carrying out smoothing filtering processing on the received longitudinal electric field data effective value of each period and sending the processed data to the data receiving terminal machine in a wireless ad hoc network communication mode;
in the embodiment of the invention, the data receiving terminal is used for performing curve fitting on the received longitudinal electric field data by adopting a least square method, comparing the fitted curve with an originally acquired longitudinal electric field data curve to obtain a maximum difference value between the two curves, and judging whether the obtained maximum difference value exceeds a set threshold value or not, if so, the inside of the tested insulator has defects and needs to be replaced or maintained, otherwise, the insulator is normal;
in the embodiment of the invention, the data receiving terminal comprises analysis software of the insulator live detector and a computer, wherein the computer and the analysis software are used for processing data sent by the insulator live detector to the data receiving terminal and displaying a calculation analysis result through the computer.
The detection method which is carried out by adopting the insulator live detection system based on the wireless ad hoc network communication is shown in a flow chart of the method in figure 2 and comprises the following steps:
step 1, adopting an electric field sensor to collect longitudinal electric field data of an insulator, and carrying out passive filtering and differential amplification processing on the collected longitudinal electric field data;
in the embodiment of the invention, the signals are conditioned to a reasonable acquisition range by carrying out passive filtering and differential amplification processing on the acquired longitudinal electric field data;
step 2, triggering the photoelectric sensor when the electric field sensor approaches the edge of the insulator, and sending the insulator longitudinal electric field data acquired by the current electric field sensor to a data acquisition unit;
in the embodiment of the invention, the photoelectric sensor is triggered when the electric field sensor approaches the edge of the insulator, and the electric field sensor of the single chip microcomputer is informed to be in the optimal position to request for measuring electric field data;
step 3, the data acquisition unit calculates the effective value of the longitudinal electric field data of each period according to the sampling data in each period and sends the effective value to the singlechip;
in the embodiment of the invention, the signal acquisition unit utilizes a CS5464 chip, the chip is internally provided with a signal effective value for calculation, the gain multiple of an acquisition channel can be set, the signal acquisition range is expanded, and the acquisition precision is improved;
in the embodiment of the present invention, the effective value of the longitudinal electric field data in each period is obtained by the following formula:
wherein, IRMSRepresenting the effective value of longitudinal electric field data, N representing the number of samples in a period, InRepresenting the nth instantaneous longitudinal electric field sample value;
step 4, the singlechip carries out smoothing filtering processing on the received longitudinal electric field data effective value of each period, and sends the processed data to a data receiving terminal machine in a wireless ad hoc network communication mode;
in the embodiment of the invention, the single chip microcomputer collects the effective value data of 20 periods, and smooth filtering processing is carried out, so that the error sampling probability is reduced, and the sampling accuracy is improved;
step 5, repeatedly executing the step 1 to the step 5 until all insulators of the insulator string are measured;
step 6, the data receiving terminal machine carries out curve fitting on the received longitudinal electric field data by adopting a least square method;
step 7, comparing the fitted curve with an originally acquired longitudinal electric field data curve to obtain the maximum difference value between the two curves;
and 8, judging whether the obtained maximum difference value exceeds a set threshold value, if so, judging that the interior of the tested insulator has defects and needs to be replaced or maintained, and otherwise, judging that the insulator is normal.
In the embodiment of the invention, the least square method calculation processing result is compared with the original acquired data to make a difference value, and the internal defect of the corresponding insulator can be judged according to a preset threshold value; the electric field longitudinal distribution curve is a smooth curve under the normal condition of the insulator, and the electric field curve has larger distortion rate due to the occurrence of local insulator defects.
Claims (3)
1. An insulator live detection system based on wireless ad hoc network communication is characterized by comprising an insulator live detector portable device and a data receiving terminal, wherein the insulator live detector is connected with the data receiving terminal in a wireless ad hoc network communication mode;
the portable device of the electrified insulator detector comprises a single chip microcomputer, an electric field sensor, a photoelectric sensor and a data acquisition unit; wherein,
an electric field sensor: the system comprises a data acquisition unit, a data processing unit and a data processing unit, wherein the data acquisition unit is used for acquiring longitudinal electric field data of an insulator, performing passive filtering and differential amplification processing on the acquired longitudinal electric field data and sending the data to the data acquisition unit;
a photoelectric sensor: the single chip microcomputer is used for sending a signal to trigger the single chip microcomputer to receive the currently acquired insulator longitudinal electric field data;
a data acquisition unit: the device is used for solving the effective value of the longitudinal electric field data of each period according to the sampling data in each period and sending the effective value to the single chip microcomputer;
a single chip microcomputer: the device is used for carrying out smoothing filtering processing on the received longitudinal electric field data effective value of each period and sending the processed data to a data receiving terminal machine in a wireless ad hoc network communication mode;
the data receiving terminal machine: the method is used for performing curve fitting on the received longitudinal electric field data by adopting a least square method, comparing the fitted curve with an originally acquired longitudinal electric field data curve to obtain a maximum difference value between the two curves, and judging whether the obtained maximum difference value exceeds a set threshold value, if so, the inside of the tested insulator has defects and needs to be replaced or maintained, otherwise, the insulator is normal.
2. The detection method based on the wireless ad hoc network communication insulator live detection system is characterized by comprising the following steps:
step 1, adopting an electric field sensor to collect longitudinal electric field data of an insulator, and carrying out passive filtering and differential amplification processing on the collected longitudinal electric field data;
step 2, triggering the photoelectric sensor when the electric field sensor approaches the edge of the insulator, and sending the insulator longitudinal electric field data acquired by the current electric field sensor to a data acquisition unit;
step 3, the data acquisition unit calculates the effective value of the longitudinal electric field data of each period according to the sampling data in each period and sends the effective value to the singlechip;
step 4, the singlechip carries out smoothing filtering processing on the received longitudinal electric field data effective value of each period, and sends the processed data to a data receiving terminal machine in a wireless ad hoc network communication mode;
step 5, repeatedly executing the step 1 to the step 5 until all insulators of the insulator string are measured;
step 6, the data receiving terminal machine carries out curve fitting on the received longitudinal electric field data by adopting a least square method;
step 7, comparing the fitted curve with an originally acquired longitudinal electric field data curve to obtain the maximum difference value between the two curves;
and 8, judging whether the obtained maximum difference value exceeds a set threshold value, if so, judging that the interior of the tested insulator has defects and needs to be replaced or maintained, and otherwise, judging that the insulator is normal.
3. The detecting method according to claim 2, wherein the effective value of the longitudinal electric field data in each period is obtained in step 3 by the following formula:
wherein, IRMSRepresenting the effective value of longitudinal electric field data, N representing the number of samples in a period, InRepresenting the nth instantaneous longitudinal electric field sample 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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| CN203376421U (en) * | 2013-07-31 | 2014-01-01 | 国家电网公司 | Electrified detection device for composite insulator string |
| 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 |
-
2015
- 2015-10-27 CN CN201510708804.1A patent/CN105403815A/en active Pending
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 |
| CN101576593A (en) * | 2009-05-15 | 2009-11-11 | 重庆大学 | Array type inferior insulator local electric field detector and inverse diagnosis method |
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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 |