CN203287512U - Detection calibration system of insulator contamination current monitoring device - Google Patents
Detection calibration system of insulator contamination current monitoring device Download PDFInfo
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- CN203287512U CN203287512U CN201320222284XU CN201320222284U CN203287512U CN 203287512 U CN203287512 U CN 203287512U CN 201320222284X U CN201320222284X U CN 201320222284XU CN 201320222284 U CN201320222284 U CN 201320222284U CN 203287512 U CN203287512 U CN 203287512U
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- 239000012212 insulator Substances 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000011109 contamination Methods 0.000 title claims abstract description 27
- 238000012806 monitoring device Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000004088 simulation Methods 0.000 claims abstract description 15
- 150000003839 salts Chemical class 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 14
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- 238000012795 verification Methods 0.000 claims description 4
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Abstract
The utility model pertains to the field of intelligent electrical apparatuses, and specifically relates to a detection calibration system of an insulator contamination current monitoring device. The utility model provides a detection calibration system of an insulator contamination current monitoring device. Through the detected device calibration system, current calibration is performed on a detected device in a standard laboratory environment; contamination environments are simulated through a test environment simulation system, and contamination current curves of the detected device and a standard contamination current measuring sensor are compared so as to determine whether the detected device can be used to truly reflect the actual condition of the contamination current. According to the utility model, detection and calibration can be performed on the insulator contamination current monitoring device, and at the same time, the stability of the insulator contamination current monitoring device can be checked by simulating the contamination environments for a long time.
Description
Technical field
The invention belongs to the intelligent electric appliance field, be specifically related to a kind of detection check system of insulator contamination current monitoring device.
Background technology
Insulator is extensive at transmission line of electricity and application in substations, plays the double action that supports circuit and insulation.Along with electrical network in world wide is extended on a large scale, the particularly construction of UHV Transmission Engineering, more and more at the area of different gradation for surface pollution application insulator.In August, 2003 America ﹠ Canada generation electrical network is had a power failure on a large scale, and is state and the areas such as Australia, English, Northern Europe, meaning subsequently, until India's power grid in 2012 occurs twice in succession, has a power failure on a large scale.Electric grid large area power cut, economic loss and social influence are huge.Even short a few hours, also can cause the confusion and upheaval of society.Have a power failure on a large scale because system local fault (as the individual line accident) causes the electrical network that chain reaction causes, cause that department of national governments and power industry greatly pay close attention to.
Pollution flashover is to bring out electrical network to lose one of stable factor, and system stability destroys, and causes electrical network to have a power failure on a large scale.Regional and large tracts of land pollution flashover directly causes the partial electric grid off-the-line even to be collapsed, and causes electrical network to have a power failure on a large scale.China is in the rapid economic development phase, and atmosphere polluting problem is outstanding, and the electrical network pollution flashover is difficult to avoid.Therefore, be one of main threat of facing of China's electrical network from electrical network regional area or large-area pollution flashover accident.The 1950's, the proposition of F. Obenaus physical model, namely the voltage at model two ends is:
In formula, I is the filthy electric current that flows through surface, and x is local arc length, and R (x) is surface residue pollution layer resistance, and A, n are the electric arc constant.
AxI
-nRepresent the local arc pressure drop, it increases and reduces with electric current; The ohmically pressure drop of R (x) I representative residue pollution layer, it increases with electric current.
Obviously, to a minimum withstand voltage Umin, a corresponding filthy current value I max must be arranged; When filthy electric current surpassed Imax, flashover was completed.Surface pollution layer resistance determines filthy size of current, has just determined also whether flashover occurs.Therefore measure the size of filthy electric current, just can reflect the pollution level of insulator, the filthy electric current of on-line monitoring insulator just can be monitored the pollution level of insulator, and regular cleaning insulator is before become repair based on condition of component, that shoots the arrow at the target carries out the antifouling work of insulator, uses manpower and material resources sparingly.
The measurement mechanism of insulator contamination electric current has more, application is to a certain degree also arranged in the market, but because this device manufacturer major part is Scientific Research Activities mechanism or medium-sized and small enterprises, so there are some problems in accuracy and the stability of this device, most of device easily damages in actual use, increases burden to plant maintenance on the contrary.These problems affect the large tracts of land of this device use, just because of this, need to set up perfect detection system and the method for cover, estimate the condition whether this device meets the circuit actual motion, whether possesses the networking qualification, and then made being applied in real work that product can be a large amount of, safeguard for circuit and transformer station and offer convenience.
In view of this, the invention provides a kind of detection check system and method for insulator contamination electric current on-Line Monitor Device, to address the above problem.
Summary of the invention
For the deficiency of background technology, the present invention proposes a kind of detection check system of insulator contamination current monitoring device, by by the checking device calibration system, under the code test room environmental to by checking device, being carried out correcting current; By experimental enviroment simulation system simulation filthy environment, contrast is by the filthy current curve of checking device and the filthy current metering sensor of standard, and then whether judgement can be reacted the actual conditions of filthy electric current really by checking device.The present invention can realize the insulator contamination current monitoring device is detected and verification, can pass through the Long-Term Simulations filthy environment simultaneously, examines the stability of insulator contamination current monitoring device.
Technical scheme of the present invention is: a kind of detection check method of insulator contamination current monitoring device comprises the following steps:
The first step: adopt by the checking device calibration system, to by checking device, being carried out correcting current, whether by checking device under standard environment accurate,, if accuracy meets standard-required, carry out next step detection if examining under the code test room environmental;
Second step: adopt experimental enviroment simulation system simulation filthy environment, control simultaneously pollution level, contrast is by the filthy current curve of checking device and the filthy current metering sensor of standard, and then whether judgement can be reacted the actual conditions of filthy electric current really by checking device.
Detection check method as above is characterized in that: described filthy current error by the filthy current metering sensor of checking device and standard is not more than 10% and thinks the actual conditions that can be reacted really filthy electric current by checking device.
a kind of detection check system of insulator contamination current monitoring device, comprise by checking device calibration system and experimental enviroment simulation system, by the checking device calibration system by multimeter, industrial computer, signal generator, current amplifier, the precision resistance case, sequentially interconnected composition by checking device and multimeter, it is characterized in that: described experimental enviroment simulation system comprises the artificial pollution test chamber, compound wall bushing, the pollution test power-supply system, insulator, temperature/humidity measuring system, filthy current measurement system, artificial pollution test's chamber interior is furnished with barber system and salt fog system.
Detection check system as above is characterized in that: described pollution test power-supply system and compound wall bushing are used for providing the pollution test power supply to insulator.
Detection check system as above is characterized in that: described salt fog system provides salt fog by the salt atomizing nozzle, and the barber system provides barber by steam jet.
Detection check system as above, it is characterized in that: temperature/humidity measuring system is arranged near insulator.
Detection check system as above is characterized in that: filthy current measurement system is by the filthy electric current of the filthy current metering sensor measurement standard of standard.
Detection check system as above is characterized in that: by by good by checking device, can being placed in the artificial pollution test chamber of checking device calibration system verification.
The invention has the beneficial effects as follows: by the detection check system of insulator contamination current monitoring device, can calibrate the electric current accuracy of insulator contamination current monitoring device, simultaneously by the actual filthy condition of simulation, can contrast by the ruuning situation of checking device under the filthy condition of reality, simultaneously, charging operation, examine by the Stability and dependability under the checking device long-time running for a long time.
Description of drawings
Fig. 1 is by checking device calibration system figure;
Fig. 2 is the experimental enviroment sight-reading chart;
Fig. 3 is the multi-stage protection circuit of experimental enviroment simulation system.
Embodiment
This paper explanation of nouns:
By checking device: the insulator contamination current monitoring device that needs calibrating
Description of reference numerals:
Fig. 1: 14-signal generator, 15-current amplifier, 16-precision resistance case, 17-multimeter, 18-industrial computer, 19-by checking device
Fig. 2: the filthy current metering sensor, 19 of 1-artificial pollution test chamber, 2-compound wall bushing, 3-pollution test power-supply system, 4-salt fog system, 5-barber system, 6-steam jet, 7-salt atomizing nozzle, 8-insulator, 9-Temperature Humidity Sensor, 10-standard-by checking device, 12-temperature/humidity measuring system, 13-filthy current measurement system
Fig. 3: R1-first protective resistance; R2-second protective resistance; R3-the 3rd protective resistance; R4-the 4th protective resistance; R5-the 5th protective resistance, TVS1-first Transient Suppression Diode, TVS2-second Transient Suppression Diode, GDT-gas-discharge tube, Re-voltage dependent resistor (VDR), the filthy current metering sensor of 10-standard
The present invention will be further described below in conjunction with accompanying drawing, but content of the present invention not only is confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
The detection check system and method for insulator contamination current monitoring device
As shown in Figures 1 and 2, the detection check system of insulator contamination current monitoring device provided by the present invention comprises by checking device calibration system and experimental enviroment simulation system.
As shown in Figure 1, of the present invention by the checking device calibration system comprise multimeter 17, industrial computer 18, signal generator 14, precision resistance case 16, by checking device 19 and current amplifier 15.Multimeter 17 in this example adopts the Angilent34411a digital multimeter, signal generator 14 adopts Tyke AFG2021 signal generator, current-limiting resistance is precision resistance case 16, signal generator 14, multimeter 17 all are connected by data line with industrial computer 18, can edit by industrial computer 18 waveform that signal generator 14 produces, make waveform and the filthy current waveform of generation similar, and show the data that multimeter 17 is measured.The filthy current waveform of the simulation that signal generator 14 produces, amplify by current amplifier 15, then pass through by checking device 19, be connected with six and half multimeters 17 finally, such six and half multimeters 17 with by checking device 19 at a current return, calibrate by checking device 19 by the numerical value that six and half multimeters 17 show.
as shown in Figure 2, experimental enviroment simulation system of the present invention comprises artificial pollution test chamber 1, compound wall bushing 2, pollution test power-supply system 3, insulator 8, temperature/humidity measuring system 12, filthy current measurement system 13, simultaneously will be as good in the verification of Fig. 1 institute be positioned in artificial pollution test chamber 1 by checking device 19, it is all the testing laboratory of 3 meters that the length and width height can be built up in artificial pollution test chamber 1, its inside is furnished with barber system 5 and salt fog system 4, simulate different filthy environments, wherein salt fog system 4 is mainly simulated the coastal filthy environment that waits, barber system 5 is added in test the artificial pollution thing that is coated on insulator, simulate industrial pollution etc., wherein pollution test power-supply system 3 and compound wall bushing 2 are used for providing the pollution test power supply to insulator 8, its output current ability should be larger, this device is chosen electric current 4A, output voltage 0-110kV, salt fog system 4 provides salt fog by salt atomizing nozzle 7, barber system 5 provides barber by steam jet 6, temperature/humidity measuring system 12 is measured humiture by near Temperature Humidity Sensor 9 insulator 8, filthy current measurement system 13 carrys out the filthy electric current of measurement standard by the filthy current metering sensor 10 of standard, the filthy electric current of this standard carries out comparison of wave shape with the filthy electric current of being measured by checking device 19, determine whether can be measured by checking device 19 characteristic quantity of filthy electric current, and then determine whether met the demands by checking device 19., by long-term contrast test, judge by checking device 19 and whether can move under long-term salt fog or barber simultaneously, and the stability of long-time running and reliability.
Those skilled in the art it is generally acknowledged that the filthy electric current measured by checking device 19 and the filthy electric current of standard think qualified by checking device 19 in 10%.
as shown in Figure 3, the insulator contamination electric current has passed through the anti-overvoltage protection of the one-level that is comprised of protective resistance R1 and the first Transient Suppression Diode TVS1, prevent overvoltage protection by the secondary that protective resistance R2 and gas-discharge tube GDT form, three grades of anti-overvoltage protections that formed by protective resistance R3 and voltage dependent resistor (VDR) Re, prevent overvoltage protection by the level Four that protective resistance R4 and the second Transient Suppression Diode TVS2 form, by cooperatively interacting of the anti-overvoltage protection of this level Four, the filthy current metering sensor 10 of the standard that can guarantee not there will be superpotential situation, also just guarantee the security of filthy current measurement system 13.
The detection check method of a kind of insulator contamination current monitoring device of the present invention comprises the following steps:
Step 1: by being examined and determine by the checking device calibration system by accuracy and the frequency response of the measurement electric current of checking device 19 as shown in Figure 1, when calibration, first signalization waveform, for example 50HZ is sinusoidal wave, regulate size of current by the adjustment precision resistance box afterwards, calibrate under different electric currents by the accuracy of checking device 19.Then the frequency of conditioning signal, from 50Hz to 10kHZ, calibrate by the frequency response degree of checking device 19.The frequency response degree has reacted by the ability of the measurement variable signal of checking device., if accuracy and frequency response by checking device under the standard test environment meet the demands, can proceed to detect.
Step 2, by the leakage current waveform under dry run condition as shown in Figure 2, contrast is by checking device 19 and the filthy operation accuracy of current metering sensor 10 in real work of standard and stability and the reliability of long-time running.Salt fog amount and the barber amount controlled in artificial pollution are controlled pollution level, make whole testing process filthy to pollution flashover occurs from nothing.Record the current waveform of whole process, compare, draw and whether can be met error by checking device 19 and be not more than 10% requirement.Record simultaneously the humiture curve, can analyze the relation of humiture and filthy electric current by a large amount of tests, and then instruct the filthy current monitoring device of actual hanging net operation to carry out correct pre-warning judgement.
The content that is not described in detail in this instructions belongs to the known prior art of this area professional and technical personnel.
Claims (6)
1. the detection check system of an insulator contamination current monitoring device, comprise by checking device calibration system and experimental enviroment simulation system, by the checking device calibration system by multimeter, industrial computer, signal generator, current amplifier, the precision resistance case, sequentially interconnected composition by checking device and multimeter, it is characterized in that: described experimental enviroment simulation system comprises the artificial pollution test chamber, compound wall bushing, the pollution test power-supply system, insulator, temperature/humidity measuring system, filthy current measurement system, artificial pollution test's chamber interior is furnished with barber system and salt fog system.
2. detection check system as claimed in claim 1, it is characterized in that: described pollution test power-supply system and compound wall bushing are used for providing the pollution test power supply to insulator.
3. detection check system as claimed in claim 1, it is characterized in that: described salt fog system provides salt fog by the salt atomizing nozzle, and the barber system provides barber by steam jet.
4. detection check system as claimed in claim 1, it is characterized in that: temperature/humidity measuring system is arranged near insulator.
5. detection check system as claimed in claim 1 is characterized in that: filthy current measurement system is by the filthy electric current of the filthy current metering sensor measurement standard of standard.
6. arbitrary detection check system as described in claim 1 to 5 is characterized in that: by by good by checking device, can being placed in the artificial pollution test chamber of checking device calibration system verification.
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| CN201320222284XU CN203287512U (en) | 2013-04-27 | 2013-04-27 | Detection calibration system of insulator contamination current monitoring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245927A (en) * | 2013-04-27 | 2013-08-14 | 中国电力科学研究院 | System and method for detecting and verifying monitoring device of insulator polluted current |
| CN104502762A (en) * | 2014-12-19 | 2015-04-08 | 广东电网有限责任公司电力科学研究院 | Data validity detection device for transformer bushing monitoring system |
| CN104569767A (en) * | 2015-01-21 | 2015-04-29 | 国家电网公司 | Leakage current signal acquisition system of insulator |
| CN104749192A (en) * | 2015-01-14 | 2015-07-01 | 国网电力科学研究院武汉南瑞有限责任公司 | Rainwater sensitive type humiture sensing device |
| CN109839579A (en) * | 2018-12-27 | 2019-06-04 | 国网浙江诸暨市供电有限公司 | Intelligent voltage limiter lightning current impact test apparatus |
-
2013
- 2013-04-27 CN CN201320222284XU patent/CN203287512U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245927A (en) * | 2013-04-27 | 2013-08-14 | 中国电力科学研究院 | System and method for detecting and verifying monitoring device of insulator polluted current |
| CN104502762A (en) * | 2014-12-19 | 2015-04-08 | 广东电网有限责任公司电力科学研究院 | Data validity detection device for transformer bushing monitoring system |
| CN104502762B (en) * | 2014-12-19 | 2015-11-18 | 广东电网有限责任公司电力科学研究院 | Bushing shell for transformer monitoring system data validity pick-up unit |
| CN104749192A (en) * | 2015-01-14 | 2015-07-01 | 国网电力科学研究院武汉南瑞有限责任公司 | Rainwater sensitive type humiture sensing device |
| CN104749192B (en) * | 2015-01-14 | 2016-10-12 | 国网电力科学研究院武汉南瑞有限责任公司 | Rainwater responsive type temperature and humidity sensing device |
| CN104569767A (en) * | 2015-01-21 | 2015-04-29 | 国家电网公司 | Leakage current signal acquisition system of insulator |
| CN109839579A (en) * | 2018-12-27 | 2019-06-04 | 国网浙江诸暨市供电有限公司 | Intelligent voltage limiter lightning current impact test apparatus |
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Granted publication date: 20131113 Termination date: 20140427 |