CN202975140U - Leakage-current detection system for switch-cabinet lightning arrester - Google Patents
Leakage-current detection system for switch-cabinet lightning arrester Download PDFInfo
- Publication number
- CN202975140U CN202975140U CN 201220669659 CN201220669659U CN202975140U CN 202975140 U CN202975140 U CN 202975140U CN 201220669659 CN201220669659 CN 201220669659 CN 201220669659 U CN201220669659 U CN 201220669659U CN 202975140 U CN202975140 U CN 202975140U
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- Prior art keywords
- lightning arrester
- detection system
- controller
- detector
- leakage current
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- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 230000003321 amplification Effects 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract description 20
- 229960001296 zinc oxide Drugs 0.000 abstract description 10
- 239000011787 zinc oxide Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a leakage-current detection system for a switch-cabinet lightning arrester and the leakage-current detection system includes a battery, a shielding ring, a detector, an analog to digital converter, a controller and a display apparatus, wherein the shielding ring, the detector, the analog to digital converter, the controller and the display apparatus are supplied by the battery; the shielding ring is sleeved on an external to-be-detected lightning arrester body and is opposite to a lower portion of a core body in the lightning arrester. One end of the detector is connected with the lightning arrester body and the other end is grounded. An input terminal of the analogue-to-digital converter is connected with an output terminal of the detector. An input terminal of the controller is connected with an output terminal of the analog-to-digital converter. The display apparatus is connected with an output terminal of the controller. The detection system provided by the utility model can effectively detect total leakage current and calculate a resistive leakage-current component therein, thereby effectively and reliably reflecting internal quality change of the zinc-oxide lightning arrester and realizing real-time and high-efficiency online detection on the lightning arrester.
Description
Technical field
The utility model relates to the detection system of the online detector switch cabinet of a kind of energy arrester resistance current, particularly a kind of detection system of switch cabinet lightning arrester leakage current.
Background technology
Zinc-Oxide Arrester is a kind of protection equipment that protective device equipment is avoided the superpotential infringement.Due to the superior nonlinear characteristic of Zinc-Oxide Arrester and good through-current capability; now accepted and be widely used by the user of vast power department; yet a large amount of uses along with Zinc-Oxide Arrester; cause protected equipment to be damaged with causing electric power accident, generation being arranged also because lightning arrester itself has an accident, especially in a single day 110KV and above Zinc-Oxide Arrester have an accident and will bring about great losses to the user.
Be at lightning arrester that under normal working voltage state, resistive current component is far smaller than capacitive component, general resistive leakage current component accounts for circuital ratio can not surpass 10 ~ 15% numerical value, even so resistive component doubles, circuital variation can not surpass 5.0%.Only detect total current, just can not effectively monitor the deteriorated trend of internal performance of lightning arrester.
Current in resistance property increases the amplitude of total current increase and little, and total current can not fast, correctly be found the mass change of lightning arrester inside, detects current in resistance property and could reflect effectively, reliably the mass change of Zinc-Oxide Arrester inside.
The method that traditional total current is measured has only reflected that the variation of arrester capacity current, external environment condition change, and changing value can not show obviously that the quality of lightning arrester inside changes, therefore need to adopt other method, can faster, correctly, effectively reflect the measuring method of internal soundness problem exactly, namely thinking that at present resistive component that the comparison effective method is measured lightning arrester namely damages with the heating of Zinc-Oxide Arrester inside the parameter amount that institute is combined, and differentiates referred to as current in resistance property.
Therefore the Performance Detection to lightning arrester is an important content under working voltage.Although taked for many years the multiple technologies measure, because the reason of detection method has caused detection weak effect, detection system cost high, poor reliability.Both at home and abroad all without ripe online testing product.Only have ABB AB that the advertisement of a product introduction is arranged, but also do not have so far formal product to release.Even if the technical indicator of its announcement or relatively poor like this.
So there is following problem in present pick-up unit employed both at home and abroad:
1, lack the online detection means of effective high pressure, particularly lack effectively detection means automatically;
2, present lightning arrester leakage monitoring self system can accurately in time not judge the fault of lightning arrester, (the general employing measured total current at present, and what really reflect its fault is current in resistance property);
3, due to the method that lacks the detection of passive detection and no-voltage reference quantity, can't form the product of high cost performance.
The utility model content
The purpose of this utility model is to provide a kind of detection system of switch cabinet lightning arrester leakage current, can effectively detect and leak total current and calculate wherein resistive leakage current component, thereby the mass change that reflects effectively, reliably Zinc-Oxide Arrester inside realizes the formerly detection to the lightning arrester real-time high-efficiency.
In order to realize above purpose, the utility model is achieved through the following technical solutions:
A kind of detection system of switch cabinet lightning arrester leakage current comprises: battery also comprises by described battery powered:
Shading ring, described shading ring are set on outside lightning arrester body to be detected, and it is corresponding to the bottom of lightning arrester inside core body;
Detector, an end of described detector connects lightning arrester body, its other end ground connection;
Analog to digital converter, the input end of described analog to digital converter is connected with the output terminal of detector;
Controller, the input end of described controller is connected with the output terminal of analog to digital converter;
Display device, described display device is connected with the output terminal of controller.
Described detector comprises valve block and the holding circuit of mutual series connection.
The integrated encapsulation of described valve block and holding circuit.
Also comprise: signal amplifier, described signal amplifier are arranged between detector and analog to digital converter, the signal that detects in the amplification detection instrument.
The resolution of described analog to digital converter is not less than 12.
Also comprise: wireless launcher, described wireless launcher is connected with the output terminal of controller, the signal that its outside mission controller is exported.
Described controller is single-chip microcomputer or digital signal processing microprocessor.
Also comprise: timer, described timer is connected with battery by circuit, controls the electric energy output of battery and closes.
The utility model compared with prior art has the following advantages:
Can effectively detect and leak total current and calculate wherein resistive leakage current component, thereby reflect effectively, reliably the mass change of Zinc-Oxide Arrester inside, realize the formerly detection to the lightning arrester real-time high-efficiency.
Description of drawings
Fig. 1 is the theory diagram of the detection system of the utility model switch cabinet lightning arrester leakage current;
Fig. 2 is the detector scheme of installation of the monitoring system of the utility model switch cabinet lightning arrester leakage current.
Embodiment
Below in conjunction with accompanying drawing, by describing a better specific embodiment in detail, the utility model is further elaborated.
As depicted in figs. 1 and 2, a kind of detection system of switch cabinet lightning arrester leakage current comprises: battery 8 also comprises by 8 power supplies of described battery: shading ring 2, detector 3, analog to digital converter 5, controller 6, display device 7; Wherein, shading ring 2 is set on outside lightning arrester body 1 to be detected, and it is corresponding to the bottom of lightning arrester inside core body 11; One end of detector 3 connects lightning arrester body 1, its other end ground connection; The input end of analog to digital converter 5 is connected with the output terminal of detector 3; The input end of controller 6 is connected with the output terminal of analog to digital converter 5; Display device 7 is connected with the output terminal of controller 6.In the present embodiment, also comprise: signal amplifier 4 and timer 9, wherein, signal amplifier 4 is arranged between detector 3 and analog to digital converter 5, the signal that detects in amplification detection instrument 3; Timer 9 is connected with battery 8 by circuit, controls the electric energy output of battery 8 and closes.
In the present embodiment, detector 3 comprises valve block and the holding circuit of mutual series connection, in the present embodiment, and the integrated encapsulation of valve block and holding circuit.
In the present embodiment, the resolution of analog to digital converter 5 is not less than 12.
In the present embodiment, controller 6 is single-chip microcomputer or digital signal processing microprocessor, perhaps ARM chip.
In addition, the utility model can also arrange: wireless launcher, and this wireless launcher is connected with the output terminal of controller 6, and the signal that its outside mission controller 6 is exported is for monitor staff's real-time remote monitoring detection case.
In sum, detection system and the detection method of the utility model switch cabinet lightning arrester leakage current, can effectively detect and leak total current and calculate wherein resistive leakage current component, thereby the mass change that reflects effectively, reliably Zinc-Oxide Arrester inside realizes the formerly detection to the lightning arrester real-time high-efficiency.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute will be all apparent.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (8)
1. the detection system of a switch cabinet lightning arrester leakage current, is characterized in that, comprises: battery (8) also comprises by described battery (8) power supply:
Shading ring (2), described shading ring (2) are set on lightning arrester body (1) outside to be detected, and it is corresponding to the bottom of lightning arrester inside core body (11);
Detector (3), an end of described detector (3) connects lightning arrester body (1), its other end ground connection;
Analog to digital converter (5), the input end of described analog to digital converter (5) is connected with the output terminal of detector (3);
Controller (6), the input end of described controller (6) is connected with the output terminal of analog to digital converter (5);
Display device (7), described display device (7) is connected with the output terminal of controller (6).
2. the detection system of switch cabinet lightning arrester leakage current as claimed in claim 1, is characterized in that, described detector (3) comprises valve block and the holding circuit of mutual series connection.
3. the detection system of switch cabinet lightning arrester leakage current as claimed in claim 2, is characterized in that, the integrated encapsulation of described valve block and holding circuit.
4. the detection system of switch cabinet lightning arrester leakage current as claimed in claim 1, it is characterized in that, also comprise: signal amplifier (4), described signal amplifier (4) are arranged between detector (3) and analog to digital converter (5), the signal that detects in amplification detection instrument (3).
5. the detection system of switch cabinet lightning arrester leakage current as described in claim 1 or 4, is characterized in that, the resolution of described analog to digital converter (5) is not less than 12.
6. the detection system of switch cabinet lightning arrester leakage current as claimed in claim 1, it is characterized in that, also comprise: wireless launcher, described wireless launcher is connected with the output terminal of controller (6), the signal that its outside mission controller (6) is exported.
7. the detection system of switch cabinet lightning arrester leakage current as claimed in claim 1, is characterized in that, described controller (6) is single-chip microcomputer or digital signal processing microprocessor.
8. the detection system of switch cabinet lightning arrester leakage current as claimed in claim 1, is characterized in that, also comprises: timer (9), described timer (9) is connected with battery (8) by circuit, controls the electric energy output of battery (8) and closes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220669659 CN202975140U (en) | 2012-12-07 | 2012-12-07 | Leakage-current detection system for switch-cabinet lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220669659 CN202975140U (en) | 2012-12-07 | 2012-12-07 | Leakage-current detection system for switch-cabinet lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202975140U true CN202975140U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220669659 Expired - Lifetime CN202975140U (en) | 2012-12-07 | 2012-12-07 | Leakage-current detection system for switch-cabinet lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202975140U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944738A (en) * | 2012-12-07 | 2013-02-27 | 上海市电力公司 | Detection system and detection method for leakage current of switchgear arrester |
| CN103792415A (en) * | 2014-02-13 | 2014-05-14 | 国家电网公司 | Anti-interference device for lightning arrester leakage current detection |
-
2012
- 2012-12-07 CN CN 201220669659 patent/CN202975140U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944738A (en) * | 2012-12-07 | 2013-02-27 | 上海市电力公司 | Detection system and detection method for leakage current of switchgear arrester |
| CN103792415A (en) * | 2014-02-13 | 2014-05-14 | 国家电网公司 | Anti-interference device for lightning arrester leakage current detection |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
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| CX01 | Expiry of patent term |