CN207366680U - A kind of detection device of DC zinc oxide lighting arrester valve block damp degree - Google Patents
A kind of detection device of DC zinc oxide lighting arrester valve block damp degree Download PDFInfo
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- CN207366680U CN207366680U CN201721512156.3U CN201721512156U CN207366680U CN 207366680 U CN207366680 U CN 207366680U CN 201721512156 U CN201721512156 U CN 201721512156U CN 207366680 U CN207366680 U CN 207366680U
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- Prior art keywords
- zinc oxide
- damp degree
- valve block
- lighting arrester
- central processing
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 62
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 26
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 239000000523 sample Substances 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims 1
- 229960001296 zinc oxide Drugs 0.000 abstract description 57
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000001131 transforming effect Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Thermistors And Varistors (AREA)
Abstract
The utility model provides a kind of detection device of DC zinc oxide lighting arrester valve block damp degree, is related to transforming plant DC Zinc-Oxide Arrester detection technique field.A kind of detection device of DC zinc oxide lighting arrester valve block damp degree includes power supply, fibre optic current sensor, data acquisition module, central processing unit and damp degree warning module；Power supply is connected with fibre optical sensor, fibre optic current sensor is installed on the valve block column inside DC zinc oxide lighting arrester, the output terminal of fibre optic current sensor and the input terminal of data acquisition module connect, the input terminal of the output terminal connection central processing unit of data acquisition module, the output terminal of central processing unit are connected with the input terminal of damp degree warning module.The detection device of DC zinc oxide lighting arrester valve block damp degree has the characteristics that input quantity extraction is simple, accuracy is high and detection result is obvious, reduces the failure rate of DC zinc oxide lighting arrester, improves the security performance of substation.
Description
Technical field
It the utility model is related to transforming plant DC Zinc-Oxide Arrester detection technique field, more particularly to a kind of DC electrolyzing
The detection device of zinc arrester valve piece damp degree.
Background technology
DC zinc oxide lighting arrester is the crucial overvoltage protective device of DC converter station, its operation quality directly concerns whole
Stability, the reliability of a system.Longtime running situation shows, is subject to own material properties, burning process and surrounding air
Environment influences, and the valve block of DC zinc oxide lighting arrester can make moist phenomenon, damp degree can increase with the working time without
Disconnected aggravation, makes the temperature of valve block constantly raise, explosion accident is resulted even in when serious.It is therefore, it is necessary to straight in accurate measurement
On the basis of flowing Leakage Current of Zinc-oxide Lightning Arresters, the damp degree of valve block effectively, reliably judge.
Electric system constantly develops to high voltage, remote, large capacity direction, while economy is improved, safely may be used
By the problem of also surface.Kept away as DC transmission system and the important overvoltage protective device of substation, direct current zinc oxide
The reliability of thunder device is increasingly valued by people.At this stage, the monitoring to DC zinc oxide lighting arrester is mainly based upon whole
The change of body leakage current, it is impossible to which the fault degree that makes moist of accurate judgement valve block, can not be replaced and be tieed up to arrester in time
Shield.
Utility model content
The defects of for the prior art, the utility model provide a kind of inspection of DC zinc oxide lighting arrester valve block damp degree
Device is surveyed, realizes and the detection of inexpensive, safe and summary is carried out to the damp degree of DC zinc oxide lighting arrester valve block.
A kind of detection device of DC zinc oxide lighting arrester valve block damp degree, including power module, fiber-optic current sensor
Device, data acquisition module, central processing unit and damp degree warning module；The power module and fibre optic current sensor, number
It is connected with central processing unit according to acquisition module, DC power supply is provided for these components；Multiple probes of fibre optic current sensor
It is separately mounted on each valve block column inside DC zinc oxide lighting arrester, the output terminal of fibre optic current sensor and data acquisition
The input terminal of the input terminal connection of module, the output terminal of data acquisition module and central processing unit connects, central processing unit it is defeated
Outlet is connected with the input terminal of damp degree warning module, and damp degree warning module uses host computer.
Further, the data acquisition module uses A/D converter.
Further, the central processing unit uses 51 microcontrollers.
As shown from the above technical solution, the beneficial effects of the utility model are：A kind of direct current provided by the utility model
The detection device of Zinc-Oxide Arrester valve block damp degree, DC zinc oxide lighting arrester is directly measured using fibre optic current sensor
Electrical leakage is let out as input quantity under normal work, and utilizes data acquisition module, central processing unit and damp degree early warning mould
Block realizes the detection of valve block damp degree, reduces the failure rate of DC zinc oxide lighting arrester, improves the security of substation
Can, have the characteristics that input quantity extraction is simple, accuracy is high and detection result is obvious.
Brief description of the drawings
Fig. 1 is a kind of detection device for DC zinc oxide lighting arrester valve block damp degree that the utility model embodiment provides
Structure diagram；
Fig. 2 is the signal of the direct current metal Oxide Arrester for the extra-high voltage grade series that the utility model embodiment provides
Figure；
Fig. 3 is the connection circuit structure diagram of the data acquisition module that the utility model embodiment provides and central processing unit；
Fig. 4 is valve block the letting out under different damp degrees for the DC zinc oxide lighting arrester that the utility model embodiment provides
Leakage current value curve map；
Fig. 5 be the utility model embodiment provide DC zinc oxide lighting arrester valve block difference damp degree judgement according to
According to curve map.
In figure：1st, anticorona ring；2nd, DC zinc oxide lighting arrester main body；3rd, base；4th, grounding plate.
Embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is used to illustrate the utility model, but is not intended to limit the scope of the present invention.
A kind of detection device of DC zinc oxide lighting arrester valve block damp degree, as shown in Figure 1, including power module, light
Fiber current sensor, data acquisition module, central processing unit and damp degree warning module；The power module and fibre-optic current
Sensor, data acquisition module and central processing unit are connected, and DC power supply is provided for these components；Fibre optic current sensor
Multiple probes are separately mounted on each valve block column inside DC zinc oxide lighting arrester, the output terminal of fibre optic current sensor with
The input terminal connection of data acquisition module, the input terminal of the output terminal connection central processing unit of data acquisition module, central processing
The output terminal of device is connected with the input terminal of damp degree warning module；It is pre- that handling result is output to damp degree by central processing unit
Alert module, damp degree warning module judge the valve block damp degree of DC zinc oxide lighting arrester according to handling result.
In the present embodiment, arrester uses the direct current metal Oxide Arrester of extra-high voltage grade series, as shown in Fig. 2,
The arrester includes anticorona ring 1,5 and saves the DC zinc oxide lighting arrester main body 2 that identical and series connection arrester section is formed, bottom
Seat 3 and grounding plate 4；Fibre optic current sensor uses radio-type fibre optic current sensor, by each of fibre optic current sensor
Probe is installed on the zinc oxide valve plate column inside each section arrester respectively；Data acquisition module uses model TLC2543
12 bits serial As/D converters, central processing unit use model STC89C51 51 microcontrollers, microcontroller collection data lead to
Cross serial ports and realize transmission with damp degree warning module, damp degree warning module uses host computer.
In the present embodiment, the data acquisition module in the detection device of DC zinc oxide lighting arrester valve block damp degree
The connection mode for the STC89C51 microcontrollers that TLC2543 and central processing unit use is as shown in figure 3, undamped direct current zinc oxide
Five output terminals of 5 groups of fibre optic current sensors inside arrester are connected respectively to the input of data acquisition module TLC2543
AIN0~AIN4 is held, five output terminals difference of 5 groups of fibre optic current sensors inside the DC zinc oxide lighting arrester after making moist
It is connected to input terminal AIN5~AIN9 of data acquisition module TLC2543.The output terminal EOC of data acquisition module TLC2543,
CLK, DIN, DOUT andP10, P11, P12, P13 and the P14 for being connected respectively to central processing unit STC89C51 microcontrollers draw
Foot.The RXD and TXD of microcontroller STC89C51 is connected with damp degree warning module respectively, and P00-P007 pins and P20-P23 draw
Foot is connected with display device respectively, and P24-P27 is connected with regulation device respectively, and regulation device and display device are used for adjusting and showing
Show the handling result of STC89C51 microcontrollers.
Using DC zinc oxide lighting arrester valve block damp degree detection device carry out DC zinc oxide lighting arrester valve block by
The detection of tidal excursion degree, comprises the following steps：
Each probe of fibre optic current sensor, is respectively installed in the direct current zinc oxide for not occurring making moist failure and keeps away by step 1
On valve block column inside each section of thunder device, fibre optic current sensor utilizes beam deflection angle and the transformational relation of leakage current values,
Worked normally down not by the leakage current values of time of tide DC zinc oxide lighting arrester；
The conversion formula of beam deflection angle and leakage current values, it is as follows：
θ=VBI
Wherein, θ is deflection angle, and V is Verdet constant, and I is leakage current, and B is electromagnetic intensity, and L is emergent light
By force, L0For incident intensity；
Data acquisition module carries out analog-to-digital conversion to obtained leakage current values, and analog-digital conversion result is output to center
In processor；
Each probe of fibre optic current sensor, is respectively installed in the direct current zinc oxide for occurring making moist failure and keeps away by step 2 again
On valve block column inside each section of thunder device, fibre optic current sensor utilizes beam deflection angle and the transformational relation of leakage current values,
The leakage current values by time of tide DC zinc oxide lighting arrester are obtained, data acquisition module carries out modulus to obtained leakage current values
Conversion, and analog-digital conversion result is output in central processing unit；
In the present embodiment, its damp degree is represented with the resistivity of zinc oxide valve plate in DC zinc oxide lighting arrester, is aoxidized
The resistivity of zinc valve block is smaller, its damp degree is more serious.As shown in figure 4, simulate respectively DC zinc oxide lighting arrester not by
The time of tide and the operating mode of different damp degrees, the resistivity of zinc oxide valve plate is respectively 15M Ω m, 14.6M Ω m, 14.2M
Ω m, 13.8M Ω m, 13.5M Ω m and 13.2M Ω m, 5 sections are obtained after the digital-to-analogue conversion of data acquisition module and are taken shelter from the thunder
The leakage current maximum of device, is respectively 69 μ A, 70.3 μ A, 72.1 μ A, 74.1 μ A, 76.3 μ A and 78.5 μ A, and these are kept away
The leakage current maximum of thunder device is output in central processing unit.
Step 3, the leakage current values for flowing through according to collection not by the time of tide and by the time of tide zinc oxide valve plate, in central processing
The leakage current rate of change of each section DC zinc oxide lighting arrester is calculated in device respectively, it is pre- that result of calculation is output to damp degree
In alert module；
DC zinc oxide lighting arrester leakage current rate of change calculation formula is as follows：
In the present embodiment, leakage current maximum and leakage current during according to the zinc oxide valve plate different resistivity of collection
Rate of change calculation formula, has been calculated the corresponding leakage current rate of change maximum under different damp degrees, is respectively
1.85%th, 4.3%, 6.88%, 9.57% and 12.1%, and result of calculation is output in damp degree warning module.
Step 4, by zinc oxide valve plate be equivalent to varistor, and the leakage current rate of change is exceeded to varistor during threshold value
It is determined as the varistor of failure.In damp degree warning module, according to each of the DC zinc oxide lighting arrester being calculated
Leakage current rate of change maximum, judges the damp degree of each zinc oxide valve plate, if leakage current rate of change maximum be more than or
Equal to threshold value, then the damp degree of zinc oxide valve plate reaches early warning degree, and early warning is carried out to failure.
In the present embodiment, the threshold value of the leakage current rate of change is set to 10%, damp degree warning module according to difference by
The leakage current rate of change maximum of DC zinc oxide lighting arrester under tidal excursion degree, draws damp degree basis for estimation curve map, such as
Shown in Fig. 5, abscissa is the resistivity of zinc oxide valve plate, represents damp degree, ordinate is the leakage current rate of change.From figure
As can be seen that when the resistivity of zinc oxide valve plate is reduced to 13.2M Ω m because making moist, the leakage current rate of change is
12.1%, more than the threshold value 10% of the leakage current rate of change, it is special to lose excellent non-linear volt-ampere for zinc oxide valve plate at this time
Property, it is necessary to replace DC zinc oxide lighting arrester in time；Meanwhile letting out when the leakage current rate of change is 10% can be obtained
Leakage current value is 77 μ A, which is the critical value of leakage current.When DC zinc oxide lighting arrester leaks caused by making moist
When electric current is increased close to critical value, damp degree warning module can start to alarm, arrester will be carried out at this time safeguard and
Replace, reduce the failure rate of DC zinc oxide lighting arrester.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：
It can still modify the technical solution described in previous embodiment, either to which part or all technical characteristic
Carry out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from the utility model right and want
Seek limited range.
Claims (3)
- A kind of 1. detection device of DC zinc oxide lighting arrester valve block damp degree, it is characterised in that：Including power module, optical fiber Current sensor, data acquisition module, central processing unit and damp degree warning module；The power module is passed with fibre-optic current Sensor, data acquisition module and central processing unit are connected, and DC power supply is provided for these components；Fibre optic current sensor it is more A probe is separately mounted on each valve block column inside DC zinc oxide lighting arrester, the output terminal and number of fibre optic current sensor Connected according to the input terminal of acquisition module, the output terminal of data acquisition module and the input terminal of central processing unit connect, central processing The output terminal of device is connected with the input terminal of damp degree warning module, and damp degree warning module uses host computer.
- 2. a kind of detection device of DC zinc oxide lighting arrester valve block damp degree according to claim 1, its feature exist In：The data acquisition module uses A/D converter.
- 3. a kind of detection device of DC zinc oxide lighting arrester valve block damp degree according to claim 1, its feature exist In：The central processing unit uses 51 microcontrollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721512156.3U CN207366680U (en) | 2017-11-14 | 2017-11-14 | A kind of detection device of DC zinc oxide lighting arrester valve block damp degree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721512156.3U CN207366680U (en) | 2017-11-14 | 2017-11-14 | A kind of detection device of DC zinc oxide lighting arrester valve block damp degree |
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| CN207366680U true CN207366680U (en) | 2018-05-15 |
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|---|---|---|---|
| CN201721512156.3U Expired - Fee Related CN207366680U (en) | 2017-11-14 | 2017-11-14 | A kind of detection device of DC zinc oxide lighting arrester valve block damp degree |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727993A (en) * | 2017-11-14 | 2018-02-23 | 国网辽宁省电力有限公司电力科学研究院 | The detection means and detection method of DC zinc oxide lighting arrester valve block damp degree |
| CN112461338A (en) * | 2020-11-18 | 2021-03-09 | 珠海格力电器股份有限公司 | Liquid level detection abnormity judgment device and method |
-
2017
- 2017-11-14 CN CN201721512156.3U patent/CN207366680U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727993A (en) * | 2017-11-14 | 2018-02-23 | 国网辽宁省电力有限公司电力科学研究院 | The detection means and detection method of DC zinc oxide lighting arrester valve block damp degree |
| CN112461338A (en) * | 2020-11-18 | 2021-03-09 | 珠海格力电器股份有限公司 | Liquid level detection abnormity judgment device and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180515 Termination date: 20211114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |