CN101762764A - Arrester capacity current hardware separating circuit and method thereof - Google Patents
Arrester capacity current hardware separating circuit and method thereof Download PDFInfo
- Publication number
- CN101762764A CN101762764A CN200810207717A CN200810207717A CN101762764A CN 101762764 A CN101762764 A CN 101762764A CN 200810207717 A CN200810207717 A CN 200810207717A CN 200810207717 A CN200810207717 A CN 200810207717A CN 101762764 A CN101762764 A CN 101762764A
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- current
- arrester
- separating circuit
- current hardware
- capacity current
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Abstract
The invention discloses an arrester capacity current hardware separating circuit and a method thereof. The method can promote the detecting precision, is capable of really reflecting the working state of the arrester, has low detecting cost, and is easy to popularize. The technical scheme of the invention is that the arrester capacity current hardware separating circuit comprises an operational amplifier and an active filter which are connected one by one.
Description
Technical field
The present invention relates to a kind of capacity current hardware separating circuit and method thereof, relate in particular to a kind of arrester capacity current hardware separating circuit and method thereof.
Technical background
The leakage total current of lightning arrester has comprised capacitive leakage current and two parts of resistive leakage current.Wherein resistive leakage current is the technical parameter that really reflects the lightning arrester running status.Because conventionally necessary sampled leakage total current of the detection of resistive leakage current and voltage by calculating voltage and circuital angle, utilize the trigonometric function relation to extrapolate current in resistance property then.Thereby current in resistance property generally only accounts for circuitally 10% to 15%, and the current in resistance property value error that calculates through twice multiplication is bigger.Cause two critical defects of conventional sense method, that is: accuracy of detection relatively poor, can't truly reflect the lightning arrester duty and detect cost higher owing to need to use the high pressure P T of sampled voltage, can't promote.
Summary of the invention
The present invention has overcome deficiency of the prior art, and a kind of accuracy of detection height is provided, and lower-cost arrester capacity current hardware separation method, reflects the lightning arrester duty more realistically, is easy to promote.
The present invention is achieved by following technical proposals:
A kind of arrester capacity current hardware separating circuit of one of the present invention comprises amplifier (3) and the active filter (4) that connects successively.
A kind of arrester capacity current hardware separation method of two of the present invention may further comprise the steps:
Step 1: will leak total current from current input terminal (1) input amplifier (3), and amplify to leaking total current;
Step 2: leakage total current after will amplifying input active filter (4), employing be the bandpass characteristics wave filter, the sine wave of permission fixed frequency passes through;
Step 3: the sine-wave current of current output terminal (2) the output fixed frequency by active filter (4), i.e. capacitive leakage current.
Because adopt technique scheme, a kind of lightning arrester total current frequency conversion method provided by the invention has such beneficial effect: improved the precision that detects, reflected the lightning arrester duty more realistically, it is lower to detect cost simultaneously, is easy to promote.
Description of drawings
Fig. 1 is the structural representation of a kind of arrester capacity current hardware separating circuit of one of the present invention.
Embodiment
Below by embodiment the present invention is described in further detail.
A kind of arrester capacity current hardware separating circuit of one of the present invention comprises amplifier (3) and the active filter (4) that connects successively.
A kind of arrester capacity current hardware separation method of two of the present invention may further comprise the steps:
Step 1: will leak total current is the amplifier (3) of TL062 from current input terminal (1) input model, amplifies leaking total current;
Step 2: leakage total current after will amplifying input model is the active filter (4) of FW302, employing be the bandpass characteristics wave filter, the permission fixed frequency is that the sine wave of 50Hz passes through;
Step 3: be the sine-wave current of current output terminal (2) output fixed frequency of the active filter (4) of FW302, i.e. capacitive leakage current by model.
Above embodiment has been described in detail the present invention, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details in the embodiment should not constitute limitation of the invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (2)
1. an arrester capacity current hardware separating circuit is characterized in that, comprises the amplifier (3) and the active filter (4) that connect successively.
2. arrester capacity current hardware separation method may further comprise the steps:
Step 1: will leak total current from current input terminal (1) input amplifier (3), and amplify to leaking total current;
Step 2: leakage total current after will amplifying input active filter (4), employing be the bandpass characteristics wave filter, the sine wave of permission fixed frequency passes through;
Step 3: the sine-wave current of current output terminal (2) the output fixed frequency by active filter (4), i.e. capacitive leakage current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207717A CN101762764A (en) | 2008-12-25 | 2008-12-25 | Arrester capacity current hardware separating circuit and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207717A CN101762764A (en) | 2008-12-25 | 2008-12-25 | Arrester capacity current hardware separating circuit and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101762764A true CN101762764A (en) | 2010-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810207717A Pending CN101762764A (en) | 2008-12-25 | 2008-12-25 | Arrester capacity current hardware separating circuit and method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN101762764A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226580A (en) * | 2016-08-05 | 2016-12-14 | 国网辽宁省电力有限公司电力科学研究院 | A kind of determination method of Zinc-Oxide Arrester capacity current |
-
2008
- 2008-12-25 CN CN200810207717A patent/CN101762764A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226580A (en) * | 2016-08-05 | 2016-12-14 | 国网辽宁省电力有限公司电力科学研究院 | A kind of determination method of Zinc-Oxide Arrester capacity current |
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| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100630 |