CN101762766A - Arrester full current frequency conversion circuit and method thereof - Google Patents
Arrester full current frequency conversion circuit and method thereof Download PDFInfo
- Publication number
- CN101762766A CN101762766A CN200810207719A CN200810207719A CN101762766A CN 101762766 A CN101762766 A CN 101762766A CN 200810207719 A CN200810207719 A CN 200810207719A CN 200810207719 A CN200810207719 A CN 200810207719A CN 101762766 A CN101762766 A CN 101762766A
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- total current
- frequency conversion
- oscillator
- lightning arrester
- current
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses an arrester full current frequency conversion 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 full current frequency conversion circuit comprises an operational amplifier, a variable capacitance diode and an oscillator which are connected one by one.
Description
Technical field
The present invention relates to a kind of total current freq converting circuit and method thereof, relate in particular to a kind of lightning arrester total current freq converting 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 lightning arrester total current frequency conversion method, reflects the lightning arrester duty more realistically, is easy to promote.
The present invention is achieved by following technical proposals:
A kind of lightning arrester total current freq converting circuit of one of the present invention comprises the amplifier (3), varactor (4) and the oscillator (5) that link to each other successively
A kind of lightning arrester total current frequency conversion method of two of the present invention may further comprise the steps:
Step 1: will leak total current and amplify leaking total current by current input terminal (1) input amplifier (3);
Step 2: the leakage total current input varactor (4) after will amplifying provides oscillator (5) variable capacitance parameter;
Step 3: according to formula C=nV
IN, determine the capacitance C of varactor (4)
4
Step 4: the frequency f of determining the current output terminal (2) that oscillator (5) connects
OUT, f
OUT=kC
4, draw f
OUT=knV
IN, k, n are the absolute amplification of device.
Owing to adopt technique scheme, lightning arrester total current freq converting circuit provided by the invention and method conversion method thereof have 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 lightning arrester total current freq converting circuit of one of the present invention.
Embodiment
Below by embodiment the present invention is described in further detail.
A kind of lightning arrester total current freq converting circuit of one of the present invention comprises the amplifier (3), varactor (4) and the oscillator (5) that link to each other successively
A kind of lightning arrester total current frequency conversion method of two of the present invention may further comprise the steps:
Step 1: the amplifier (3) that will leak total current and by current input terminal (1) input model be TL062 is amplified leaking total current;
Step 2: the leakage total current input model after will amplifying is the varactor (4) of 1NS6CB, and it is oscillator (5) the variable capacitance parameter of VFC32 that model is provided;
Step 3: according to formula C=nV
IN, determine the capacitance C of varactor (4)
4, n=10, C
4=10V
IN
Step 4: determine that model is the frequency f of the current output terminal (2) that connects of the oscillator (5) of VFC32
OUT, f
OUT=0.5C
B, draw C
4=10V
IN, f
OUT=5V
IN
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. a lightning arrester total current freq converting circuit is characterized in that, comprises the amplifier (3), varactor (4) and the oscillator (5) that link to each other successively.
2. lightning arrester total current frequency conversion method may further comprise the steps:
Step 1: will leak total current and amplify leaking total current by current input terminal (1) input amplifier (3);
Step 2: the leakage total current input varactor (4) after will amplifying provides oscillator (5) variable capacitance parameter;
Step 3: according to formula C=nV
IN, determine the capacitance C of varactor (4)
4
Step 4: the frequency f of determining the current output terminal (2) that oscillator (5) connects
OUT, f
OUT=kC
4, draw f
OUT=knV
IN, k, n are the absolute amplification of device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207719A CN101762766A (en) | 2008-12-25 | 2008-12-25 | Arrester full current frequency conversion circuit and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207719A CN101762766A (en) | 2008-12-25 | 2008-12-25 | Arrester full current frequency conversion circuit and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101762766A true CN101762766A (en) | 2010-06-30 |
Family
ID=42494055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810207719A Pending CN101762766A (en) | 2008-12-25 | 2008-12-25 | Arrester full current frequency conversion circuit and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101762766A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944725A (en) * | 2012-12-07 | 2013-02-27 | 上海市电力公司 | Full-current frequency conversion device for leakage current |
-
2008
- 2008-12-25 CN CN200810207719A patent/CN101762766A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944725A (en) * | 2012-12-07 | 2013-02-27 | 上海市电力公司 | Full-current frequency conversion device for leakage current |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100630 |