CN102297872A - Insulator contamination live line detector based on microwave irradiation principle - Google Patents
Insulator contamination live line detector based on microwave irradiation principle Download PDFInfo
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- CN102297872A CN102297872A CN2011101799501A CN201110179950A CN102297872A CN 102297872 A CN102297872 A CN 102297872A CN 2011101799501 A CN2011101799501 A CN 2011101799501A CN 201110179950 A CN201110179950 A CN 201110179950A CN 102297872 A CN102297872 A CN 102297872A
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Abstract
The invention discloses an insulator contamination live line detector based on a microwave irradiation principle; a microwave antenna and a matched load are respectively connected to two input terminals of a directional coupler; an output terminal of the directional coupler is connected to an input terminal of a high frequency front end through a microwave switch; an output terminal of the high frequency front end is respectively connected to input terminals of a square-law detector and a synchronous detector; output terminals of both the square-law detector and the synchronous detector are connected to an input terminal of a signal processor through a filter amplifier; another input terminal of the directional coupler is connected to a noise generator through another microwave switch; an output terminal of the signal processor is respectively connected to the two microwave switches, the synchronous detector and a host computer; the signal processor is connected to a storage battery. The invention is reasonable in design, accurate in detection, is convenient and rapid, has high working efficiency, does not require power cut, is especially applicable to the maintenance of electric power system insulators in high-pollution regions, and is easy to popularize and implement.
Description
One, technical field: the present invention relates to the filthy checkout equipment of a kind of power system insulation, particularly relate to the charged detector of a kind of insulator contamination based on the microwave radiation principle.
Two. background technology: in transmission system, insulator usually reduces dielectric strength because being subjected to the filth influence of materials such as salinity, earth, coal ash, and then pollution flashover takes place, and causes power outage.According to incompletely statistics, along with increasing the weight of that transmission line of electricity pollutes, the insulator contamination accident is only second to thunderbolt, accounts for second of power grid accident sum, and loss is 10 times of lightning strike accident, and the insulator contamination that particularly industry, agricultural, coastland take place causes expensive power loss.
The filth of removing on the insulator is one of important measures that prevent pollution flashover, electric system at present generally all adopts and regularly removes filthy method, having a power failure or not under the power-off condition, insulator is cleaned or the water flushing, but, be that the flushing of hand sweeping or water all exists a common problem to need to solve: how to determine the most appropriate cleaning or water flushing cycle.This not only relates to cost issues, the prior safe operation that relates to electrical network.
Three. summary of the invention:
Technical matters to be solved by this invention is: overcome the deficiencies in the prior art, a kind of reasonable in design, charged detector of the insulator contamination based on the microwave radiation principle of detecting accurate, convenient and swift, high efficiency and need not to have a power failure is provided.
Technical scheme of the present invention is: the charged detector of a kind of insulator contamination based on the microwave radiation principle, contain signal processor, microwave antenna, matched load, directional coupler, square law wave detector and lock detector, described microwave antenna is connected with two input ends of described directional coupler respectively with matched load, the output terminal of described directional coupler is connected with the input end of high frequency front-end by a microwave switch, the output terminal of described high frequency front-end is connected with the input end of described square law wave detector and lock detector respectively, the output terminal of described square law wave detector and lock detector all is connected with the input end of described signal processor behind the twt amplifier after filtration, another input end of described directional coupler is connected with noise generator by another microwave switch, the output terminal of described signal processor respectively with two microwave switches, lock detector is connected with host computer, and described signal processor is connected with accumulator.
Described high frequency front-end is made up of frequency mixer, local oscillator and intermediate frequency amplifier, wherein, described local oscillator all is connected with described frequency mixer with intermediate frequency amplifier, and, described frequency mixer is connected with described microwave switch, and described intermediate frequency amplifier is connected with lock detector with described square law wave detector respectively.
Described signal processor is DSP signal processing chip or ARM series microprocessor.Described filter amplifier contains low-frequency amplifier circuit and filtering circuit.
The invention has the beneficial effects as follows:
1, the present invention uses the Microwave Measurement technology can realize charged remote detection under the situation that does not have a power failure, does not take a sample, do not disintegrate, obtain the pollution level of insulator to be measured, security, real-time and the accuracy measured have been guaranteed simultaneously, thereby greatly avoided the generation of accidents such as pollution flashover, improved the security of operation of power networks.
2, simple to operate, the visual result of the present invention, volume is little and in light weight, easy to carry simultaneously, has effectively saved human and material resources and financial resources, reduces greatly and detects cost.
3, the present invention avoids carrying out unnecessary contact with high-tension apparatus, and is safe, in addition, helps determining cleaning period, reduces the regular at present equipment that is caused that cleans and stops transport.
4, the present invention adopts DSP signal processing chip or ARM series microprocessor as kernel processor chip, can carry out Inversion Calculation, can also carry out complex mathematical such as Fourier transform and inverse transformation and calculate, and its speed is fast, efficient is high.
5, the present invention is reasonable in design, detection is accurate, convenient and swift, high efficiency and need not to have a power failure, and its wide accommodation is particularly useful for the maintenance of high pollution regional power system insulator, has good economic benefit after the popularization.
Four, description of drawings:
Fig. 1 is the structure principle chart based on the charged detector of insulator contamination of microwave radiation principle.
Five. embodiment:
Embodiment: referring to Fig. 1, among the figure, the 1-microwave antenna, the 2-matched load, the qualitative coupling mechanism of 3-, 4-microwave switch, the 5-frequency mixer, 6-local oscillator, 7-intermediate frequency amplifier, 8-square law wave detector, 9-filter amplifier, 10-lock detector, the 11-host computer, the 12-accumulator, 13-signal processor, 14-noise generator.
Contain signal processor 13 based on the charged detector of the insulator contamination of microwave radiation principle, microwave antenna 1, matched load 2, directional coupler 3, square law wave detector 8 and lock detector 10, wherein, microwave antenna 1 is connected with two input ends of directional coupler 3 respectively with matched load 2, the output terminal of directional coupler 3 is connected with the input end of high frequency front-end by a microwave switch 3, the output terminal of high frequency front-end is connected with the input end of square law wave detector 8 with lock detector 10 respectively, the output terminal of square law wave detector 8 and lock detector 10 all is connected with the input end of signal processor 13 behind the twt amplifier 9 after filtration, another input end of directional coupler 3 is connected with noise generator 14 by another microwave switch 4, the output terminal of signal processor 13 respectively with two microwave switches 4, lock detector 10 is connected with host computer 11, and signal processor is connected with accumulator 12.
High frequency front-end is made up of frequency mixer 5, local oscillator 6 and intermediate frequency amplifier 7, wherein, local oscillator 6 all is connected with frequency mixer 5 with intermediate frequency amplifier 7, and, frequency mixer 5 is connected with microwave switch 4, and intermediate frequency amplifier 7 is connected with lock detector 10 with square law wave detector 8 respectively.
During detection, the microwave signal that insulator to be measured sends is received by microwave antenna 1, and microwave switch 4 links to each other this microwave signal of microwave antenna 1 output or the comparison load signal of matched load 2 outputs under the sequential control of signal processor 13 with high frequency front-end.Microwave signal and comparison load signal are through frequency mixer 5 and local oscillator 6 difference frequencies, exporting intermediate frequency amplifier 7 then to amplifies, amplifying signal carries out detection in lock detector 10, detect the microwave signal of microwave antenna 1 input and compare load signal, the direct current component of the tested microwave signal of twt amplifier 9 output after filtration again, this signal is through amplifying back input signal processor 13, and signal processor 13 is through computational analysiss, the result is outputed to host computer 11, be convenient to check at any time.Amplifying signal output dc voltage behind square law wave detector 8 of intermediate frequency amplifier 7 outputs, square law wave detector 8 is used to detect the envelope of intermediate frequency waveform, the DC voltage of its output be added in it above square being directly proportional of voltage amplitude, guaranteed the linear relationship of output voltage and input source noise temperature.The signal of square law wave detector 8 outputs is through amplifying back input signal processor 13, and signal processor 13 outputs to host computer 11 through computational analysis with the result, is convenient to check at any time.According to testing result, judge the pollution level of insulator, be convenient to determine cleaning period, the equipment that minimizing cleaning is regularly at present caused is too much stopped transport.
Claims (4)
1. charged detector of the insulator contamination based on the microwave radiation principle, contain signal processor, microwave antenna, matched load, directional coupler, square law wave detector and lock detector, it is characterized in that: described microwave antenna is connected with two input ends of described directional coupler respectively with matched load, the output terminal of described directional coupler is connected with the input end of high frequency front-end by a microwave switch, the output terminal of described high frequency front-end is connected with the input end of described square law wave detector and lock detector respectively, the output terminal of described square law wave detector and lock detector all is connected with the input end of described signal processor behind the twt amplifier after filtration, another input end of described directional coupler is connected with noise generator by another microwave switch, the output terminal of described signal processor respectively with two microwave switches, lock detector is connected with host computer, and described signal processor is connected with accumulator.
2. the charged detector of the insulator contamination based on the microwave radiation principle according to claim 1, it is characterized in that: described high frequency front-end is made up of frequency mixer, local oscillator and intermediate frequency amplifier, wherein, described local oscillator all is connected with described frequency mixer with intermediate frequency amplifier, and, described frequency mixer is connected with described microwave switch, and described intermediate frequency amplifier is connected with lock detector with described square law wave detector respectively.
3. the charged detector of the insulator contamination based on the microwave radiation principle according to claim 1 is characterized in that: described signal processor is DSP signal processing chip or ARM series microprocessor.
4. according to claim 1 or the charged detector of 2 or 3 described insulator contaminations based on the microwave radiation principle, it is characterized in that: described filter amplifier contains low-frequency amplifier circuit and filtering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101799501A CN102297872A (en) | 2011-06-30 | 2011-06-30 | Insulator contamination live line detector based on microwave irradiation principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101799501A CN102297872A (en) | 2011-06-30 | 2011-06-30 | Insulator contamination live line detector based on microwave irradiation principle |
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| CN102297872A true CN102297872A (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101799501A Pending CN102297872A (en) | 2011-06-30 | 2011-06-30 | Insulator contamination live line detector based on microwave irradiation principle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058130A (en) * | 2019-04-02 | 2019-07-26 | 中科伟博(苏州)智能科技有限公司 | A kind of insulator deterioration detecting apparatus based on ultra-wideband antenna sensor |
| CN113890639A (en) * | 2021-11-11 | 2022-01-04 | 中国电子科技集团公司第二十九研究所 | Device and method for detecting power of radiation unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296707C (en) * | 2004-01-13 | 2007-01-24 | 武汉大学 | Ultrasonic monitoring method and device for dirt discharge of insulator |
| CN100575936C (en) * | 2007-04-03 | 2009-12-30 | 西安交通大学 | A kind of on-Line Monitor Device of power supply system external Insulation filthy status and method |
| CN202166623U (en) * | 2011-06-30 | 2012-03-14 | 河南省电力公司郑州供电公司 | Device for realizing uninterrupted detection for pollution degree of insulator |
-
2011
- 2011-06-30 CN CN2011101799501A patent/CN102297872A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296707C (en) * | 2004-01-13 | 2007-01-24 | 武汉大学 | Ultrasonic monitoring method and device for dirt discharge of insulator |
| CN100575936C (en) * | 2007-04-03 | 2009-12-30 | 西安交通大学 | A kind of on-Line Monitor Device of power supply system external Insulation filthy status and method |
| CN202166623U (en) * | 2011-06-30 | 2012-03-14 | 河南省电力公司郑州供电公司 | Device for realizing uninterrupted detection for pollution degree of insulator |
Non-Patent Citations (1)
| Title |
|---|
| 黄敬尧: "基于微波辐射原理的污秽绝缘子检测仪研制", 《电测与仪表》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058130A (en) * | 2019-04-02 | 2019-07-26 | 中科伟博(苏州)智能科技有限公司 | A kind of insulator deterioration detecting apparatus based on ultra-wideband antenna sensor |
| CN113890639A (en) * | 2021-11-11 | 2022-01-04 | 中国电子科技集团公司第二十九研究所 | Device and method for detecting power of radiation unit |
| CN113890639B (en) * | 2021-11-11 | 2023-03-14 | 中国电子科技集团公司第二十九研究所 | Device and method for detecting power of radiation unit |
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Application publication date: 20111228 |