CN101876673A - Extreme high voltage direct-current non-contact distance-measurement electricity-testing method - Google Patents
Extreme high voltage direct-current non-contact distance-measurement electricity-testing method Download PDFInfo
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- CN101876673A CN101876673A CN2010101846673A CN201010184667A CN101876673A CN 101876673 A CN101876673 A CN 101876673A CN 2010101846673 A CN2010101846673 A CN 2010101846673A CN 201010184667 A CN201010184667 A CN 201010184667A CN 101876673 A CN101876673 A CN 101876673A
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Abstract
The invention relates to an extreme high voltage direct-current non-contact distance-measurement electricity-testing method which is divided into self-checking, data processing, comparison and acousto-optic alarming, and the method further comprises a distance-measurement and detecting phase, after self-checking is passed, detection is carried out; the detection adopts the induction principle of alternating induction method to test electricity, data acquisition of electric-field strength of the working position of an electroscope is carried out with a certain frequency, and the value after multiple tests is used as an alarming threshold value; and then distance measurement is carried out, the corresponding field intensity value is obtained from the distance value according to the field intensity and variation trend of a space electric field and is used as the electricity-testing value; the alarming threshold value and the electricity-testing value are compared, whether the tested object is electrified is reflected by acousto-optic signal alarming; the method adopts the distance-measurement mode to obtain the electricity-testing value, and the method is more accurate, and has low error and high precision compared with the existing electricity-testing value obtaining method, so as to effectively detect whether the tested lead wire is electrified.
Description
Technical field
The invention belongs to the research method field of extra-high voltage direct-current power transmission and transforming equipment managing security tools and instruments, be specifically related to a kind of extreme high voltage direct-current non-contact distance-measurement electricity-testing method.
Background technology
Operating maintenance work is the important means of grasping grid equipment ruuning situation, discovery in time and treatment facility defective." State Grid Corporation of China's electric power safety working regulation (power circuit part) " clearly stipulated: on the electrical equipment that part has a power failure, work or dead line job site attaching ground wire before, first electrical verification, the true no-voltage of identification equipment or circuit.Electroscope promptly is to be used for detecting whether have one of common tool of voltage on the power equipment, clearly verify by no-voltage whether really on the maintenance equipment by electroscope, carry out other operations again, in case charged attaching ground wire (splice grafting ground disconnecting link) appears, mistake is bumped the generation of serious accidents such as electric equipment.
In the Chinese patent 200910060796.9 " 1000kv extra-high voltage direct-current non-contact type electricity checking method and electroscope thereof ", the electrical verification reference value is obtained by the electric field intensity that data processing module carries out this working position of data acquisition with certain frequency, alarm threshold value is by site test repeatedly, rationally choose according to the variation tendency of electric field and to obtain, because the charging equipment in transformer station and the current conversion station is many, interference between the charging equipment is bigger, cause charging equipment formate field intensity on every side complicated and changeable, may disturb during electrical verification, so obtaining of reference value and alarm threshold value is subjected to external interference easily in this patent, accuracy is not high.
Summary of the invention
The purpose of this invention is to provide a kind of extreme high voltage direct-current non-contact distance-measurement electricity-testing method; whether adopt the mode that compares distance measurement value and reference value size to detect testee charged; being used for extra-high voltage direct-current power transmission and transformation line engineering, whether have electricity, play the safeguard protection effect if measuring power transmission and transformation line.
In order to achieve the above object, technical scheme of the present invention is: extreme high voltage direct-current non-contact distance-measurement electricity-testing method, be divided into self check, data processing, comparison and sound and light alarm, and it is characterized in that: also comprise range finding and detection-phase, after self check is passed through, will detect; Detect to adopt alternation inductive method principle of induction to come electrical verification, carry out the electric field intensity of data acquisition electroscope working position with certain frequency, the value that repeatedly collects is rationally chosen the back as alarm threshold value; Measure the distance value between electroscope and the lead then, the distance value that draws draws corresponding field intensity value according to the field intensity curve and the variation tendency of space electric field, as electricity testing value; Alarm threshold value and electricity testing value are compared; Warning by sound and optic signal reflects whether testee is charged, this method adopts the mode of range finding to obtain electricity testing value, electricity testing value adquisitiones is more effective, more accurate, and degree of accuracy is higher, and whether can effectively detect tested lead charged.
The invention has the beneficial effects as follows: because the present invention is according to measuring the distance between electroscope and the lead and determining that according to the field intensity curve of space electric field and variation tendency galvanoscopic electricity testing value carries out electrical verification, than before method to compare degree of accuracy higher, whether charged, the electrified body that has solved contiguous equipment under test causes the electrical verification not high difficult problem of poor repeatability, accuracy as a result to the interference of space field intensity if detecting testee effectively.
The present invention has satisfied China's direct current UHV transmission line engineer operation security protection requirement, has filled up the blank of China on extra-high voltage electric transmission and transformation device security Work tool research method, is applicable to the extra-high voltage electric transmission and transformation line data-logging.
Description of drawings
Fig. 1 is the method implementing procedure figure of the embodiment of the invention.
Fig. 2 is the direct current signal acquisition module schematic diagram of test section among Fig. 1.
Fig. 3 is the signal amplification module schematic diagram of test section among Fig. 1.
Fig. 4 is a rectification circuit schematic diagram in the signal processing module of test section among Fig. 1.
Fig. 5 is the interface circuit schematic diagram of analog to digital conversion circuit and control chip.
Fig. 6 is the corresponding diagram of embodiment of the invention distance of wire height and electricity testing value.
Specific embodiments
Below in conjunction with accompanying drawing extreme high voltage direct-current non-contact distance-measurement electricity-testing method of the present invention is described further.
Description of symbols among Fig. 2: 1-rotor, 2-stator, 3-ground brush, 4-synchronous generator, 5-motor, 6-prime amplifier, 7-circuit for controlling motor.
Fig. 1 is the process flow diagram of this method invention, extreme high voltage direct-current non-contact distance-measurement electricity-testing method is divided into self check, detection, range finding, data processing, comparison, six stages of sound and light alarm, at first to carry out self check, whether detection system can operate as normal, if self check does not have to communicate, be immediate cancel electrical verification work,, will detect if self check is passed through; Detect and adopt alternation inductive method principle of induction to come electrical verification, the electric field value that obtains the electroscope working position is also stored as alarm threshold value; Range finding is found range to testee with corresponding laser range finder, measures the distance between electroscope and the lead; The distance value that draws draws corresponding field intensity value according to the field intensity curve and the variation tendency of space electric field, as electricity testing value, carries out the comparison of two values again, if electricity testing value, illustrates then that testee is charged greater than alarm threshold value, and carries out sound and light alarm; Otherwise illustrate that testee is not charged, can continue next testee is measured.
Test section among Fig. 1 can be divided into signal amplification module, signal processing module and signal acquisition module again.
As shown in Figure 2, signal acquisition module is gathered voltage signal according to the alternation inductive method and is designed, and it is made of stator (sensing chip) 2 and rotor (shield blade) 1.When rotor 1 rotation, stator 2 periodically is exposed among the external electrical field E, or the conductively-closed sheet blocks, and makes E=0, goes round and begins again like this, just produces the alternation output signal.
The signal amplification module of test section can realize that as shown in Figure 3, it has adopted the operational amplification circuit that differential signal is amplified to suppress common mode interference signal with the method among Fig. 3; The differential type amplifying circuit that input stage generally is made up of BJT, JFET or MOSFET among Fig. 3 utilizes its symmetry characteristic can improve the common-mode rejection ratio of entire circuit, and its two input ends constitute the inverting input and the in-phase input end of entire circuit.The main effect of voltage amplifier stage is to improve voltage gain, and it can be made up of one or more levels amplifying circuit.Output stage generally is made up of voltage follower or complementary voltage follower, to reduce output resistance, improves carrying load ability.Biasing circuit is to provide suitable working current at different levels.Also have some auxiliary links in addition, as level shift circuit, overload protecting circuit and high-frequency compensation link etc.
Signal processing module is made of prime second order filter, rectification circuit and back level second order filter, and the prime wave filter is used to cut down high-frequency interferencing signal, and back level wave filter is used for the filtration of ripple; Rectification is to convert direct current signal to direct current signal, can be realized by precise rectification circuit.As shown in Figure 3, rectification circuit is made up of two operational amplifiers and peripheral resistance, diode: previous operational amplifier and corresponding resistor, diode constitute an equal proportion amplifying circuit; Second operational amplifier and advance signal are formed an adding circuit, can change the enlargement factor of rectification circuit by the value that changes R14.The resistance value of R8, R9, R10, R11, R12, R13, R14 is respectively: 10K, 10K, 10K, 20K, 10K, 10K, 20K.
Signal acquisition module, data processing, comparison and sound and light alarm can be made of modulus conversion chip and single-chip microcomputer.Signal acquisition module can be realized by the Single-chip Controlling analog to digital converter, gather with certain frequency, the frequency of gathering can be decided by the sampling rate of modulus conversion chip, the modulus conversion chip that any a precision reaches system requirements can be used for data acquisition, the data of gathering are carried out data processing through single-chip microcomputer and are stored in the single-chip microcomputer, as shown in Figure 6; Data processing, comparison and sound and light alarm can not need other peripheral circuit by the software control chip microcontroller, and system is not high to the requirement of single-chip microcomputer yet, and the single-chip microcomputer of any 51 kernels or 51 above kernels can satisfy system requirements.
Embodiment:
There is different field intensity values at different distance X place, direct current transportation lead below, according to the different galvanoscopic alarm threshold value Y differences of field intensity value, therefore according to the numerical value of the electroscope collection at certain x rice, electric pressure distance of wire below and alarm threshold value y relatively size judge whether the direct current transportation lead charged, wherein x is a scope apart from conductor spacing, its size changes according to the variation of electric pressure that (x as ± 500kV direct current is 20m～25m, alarm threshold value y is 1.8, and (1.8 measure for on-the-spot test of many times, the value of y is different under the different occasions, should be determined on a case-by-case basis)).
The electrical verification process
1, chooses suitable working point, make charged number of devices minimum as far as possible on every side, reduce other charging equipments galvanoscopic interference.
2, electroscope is carried out self check, self check by after begin electrical verification work.
3, electroscope measure in the working point apart from lead apart from d, if d is in the scope of x, i.e. 20m＜d＜25m, electroscope continues electrical verification work, if d not in the x scope, then stops electrical verification work, need find d to satisfy the working point that x requires.
4, the value z of electroscope collecting work point compares with the alarm threshold value y that sets before, if z＞y, then equipment under test is charged.
Table 1 is the field measurement data: (the distance of wire height graph of a relation corresponding with electricity testing value as shown in Figure 6, i.e. the field intensity curve of space electric field and changing trend diagram)
The suitable magnificent line of ± 500kV, the Huang Poshi of Hubei Province section, lead is charged.
Table 1
| Distance of wire height (m) | Electricity testing value z | Alarm threshold value y |
| ??21 | ??2.6 | ??1.8 |
| ??22 | ??2.5 | ??1.8 |
| ??23 | ??2.45 | ??1.8 |
| ??24 | ??2.3 | ??1.8 |
| ??25 | ??2.15 | ??1.8 |
Claims (1)
1. extreme high voltage direct-current non-contact distance-measurement electricity-testing method is divided into self check, data processing, comparison and sound and light alarm, it is characterized in that: also comprise range finding and detection-phase, after self check is passed through, will detect; Detect to adopt alternation inductive method principle of induction to come electrical verification, carry out the electric field intensity of data acquisition electroscope working position with certain frequency, the value that repeatedly collects is rationally chosen the back as alarm threshold value; Measure the distance value between electroscope and the lead then, the distance value that draws draws corresponding field intensity value according to the field intensity curve and the variation tendency of space electric field, as electricity testing value; Alarm threshold value and electricity testing value are compared; Warning by sound and optic signal reflects whether testee is charged.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621402A (en) * | 2012-04-06 | 2012-08-01 | 辽宁省电力有限公司丹东供电公司 | Intelligent safety helmet for controlling distance between human and electric equipment and control method for intelligent safety helmet |
| CN103091547A (en) * | 2013-02-04 | 2013-05-08 | 杭州双东电力科技有限公司 | Full voltage class wireless electroscope |
| CN103698591A (en) * | 2013-12-06 | 2014-04-02 | 国家电网公司 | Electroscopic device and electroscopic method of near field region of supervoltage or ultra-high voltage transmission line |
| CN104849533A (en) * | 2015-06-08 | 2015-08-19 | 国家电网公司 | High-voltage electroscope |
| CN105699742A (en) * | 2016-01-25 | 2016-06-22 | 中国电力科学研究院 | +/-800kV DC power transmission line hot-line electrical inspection device |
| CN106291081A (en) * | 2016-08-17 | 2017-01-04 | 众芯汉创（北京）科技有限公司 | Far-field region electrical verification system and method |
| CN106597065A (en) * | 2016-12-10 | 2017-04-26 | 国网浙江省电力公司金华供电公司 | MEMS non-contact high-voltage direct current electroscope |
| CN106970258A (en) * | 2017-04-01 | 2017-07-21 | 西安光远电气有限责任公司 | The powered recognition methods of ultra-high-tension power transmission line |
| CN109521258A (en) * | 2019-01-30 | 2019-03-26 | 云南电网有限责任公司电力科学研究院 | A kind of direct current electrical verification system and method based on MEMS electric-field sensor |
| CN110865230A (en) * | 2019-10-18 | 2020-03-06 | 南京信息工程大学滨江学院 | Non-contact test pencil and measurement algorithm and calibration method thereof |
| CN114137287A (en) * | 2021-12-02 | 2022-03-04 | 国网江苏省电力有限公司常州供电分公司 | Electricity-testing self-detection warning device based on high applicability of power equipment |
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| CN101487858A (en) * | 2009-02-20 | 2009-07-22 | 国网电力科学研究院 | 1000kV extra-high voltage AC non-contact type electricity checking method and apparatus |
| CN101710151A (en) * | 2009-12-11 | 2010-05-19 | 国网电力科学研究院 | Extra-high voltage direct current non-contact multi-channel electricity checking method |
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| EP0134943A1 (en) * | 1983-07-25 | 1985-03-27 | Hydro-Quebec | System and method for detecting proximity to electrical power lines |
| CN101487858A (en) * | 2009-02-20 | 2009-07-22 | 国网电力科学研究院 | 1000kV extra-high voltage AC non-contact type electricity checking method and apparatus |
| CN101710151A (en) * | 2009-12-11 | 2010-05-19 | 国网电力科学研究院 | Extra-high voltage direct current non-contact multi-channel electricity checking method |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621402A (en) * | 2012-04-06 | 2012-08-01 | 辽宁省电力有限公司丹东供电公司 | Intelligent safety helmet for controlling distance between human and electric equipment and control method for intelligent safety helmet |
| CN103091547A (en) * | 2013-02-04 | 2013-05-08 | 杭州双东电力科技有限公司 | Full voltage class wireless electroscope |
| CN103698591A (en) * | 2013-12-06 | 2014-04-02 | 国家电网公司 | Electroscopic device and electroscopic method of near field region of supervoltage or ultra-high voltage transmission line |
| CN104849533B (en) * | 2015-06-08 | 2017-01-18 | 国网山东省电力公司平原县供电公司 | High-voltage electroscope |
| CN104849533A (en) * | 2015-06-08 | 2015-08-19 | 国家电网公司 | High-voltage electroscope |
| CN105699742A (en) * | 2016-01-25 | 2016-06-22 | 中国电力科学研究院 | +/-800kV DC power transmission line hot-line electrical inspection device |
| CN106291081A (en) * | 2016-08-17 | 2017-01-04 | 众芯汉创（北京）科技有限公司 | Far-field region electrical verification system and method |
| CN106291081B (en) * | 2016-08-17 | 2023-11-21 | 众芯汉创（北京）科技有限公司 | Far field electric testing system and method |
| CN106597065A (en) * | 2016-12-10 | 2017-04-26 | 国网浙江省电力公司金华供电公司 | MEMS non-contact high-voltage direct current electroscope |
| CN106970258A (en) * | 2017-04-01 | 2017-07-21 | 西安光远电气有限责任公司 | The powered recognition methods of ultra-high-tension power transmission line |
| CN106970258B (en) * | 2017-04-01 | 2019-06-21 | 西安光远电气有限责任公司 | The electrification recognition methods of ultra-high-tension power transmission line |
| CN109521258A (en) * | 2019-01-30 | 2019-03-26 | 云南电网有限责任公司电力科学研究院 | A kind of direct current electrical verification system and method based on MEMS electric-field sensor |
| CN110865230A (en) * | 2019-10-18 | 2020-03-06 | 南京信息工程大学滨江学院 | Non-contact test pencil and measurement algorithm and calibration method thereof |
| CN110865230B (en) * | 2019-10-18 | 2021-09-07 | 南京信息工程大学滨江学院 | Non-contact test pencil and measurement algorithm and calibration method thereof |
| CN114137287A (en) * | 2021-12-02 | 2022-03-04 | 国网江苏省电力有限公司常州供电分公司 | Electricity-testing self-detection warning device based on high applicability of power equipment |
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Application publication date: 20101103 |