CN201269908Y - Wide band radio interference measuring circuit - Google Patents
Wide band radio interference measuring circuit Download PDFInfo
- Publication number
- CN201269908Y CN201269908Y CNU2008201225074U CN200820122507U CN201269908Y CN 201269908 Y CN201269908 Y CN 201269908Y CN U2008201225074 U CNU2008201225074 U CN U2008201225074U CN 200820122507 U CN200820122507 U CN 200820122507U CN 201269908 Y CN201269908 Y CN 201269908Y
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- Prior art keywords
- radio interference
- inductor
- inductance
- adjustable
- capacitor
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Abstract
The utility model relates to a radio interference measuring circuit which comprises an adjustable capacitor C, an inductor L1, an inductor L2, an adjustable resistor R1, a sampling resistor R2 and an overvoltage protection discharge tube G and is characterized in that: the adjustable capacitor C, the inductor L1, the adjustable resistor R1 and the sampling resistor R2 are connected to ground after being connected in series; the inductor L2 is in parallel connection with both ends of the adjustable resistor R1 and the sampling resistor R2; and the overvoltage protection discharge tube G is in parallel connection with both ends of the inductor L2. Both the sampling resistor R2 and the capacitor C are adjustable and can match to different frequency, thereby rendering the measured value to reach a wider range. In the radio interference measuring circuit, the inductor L1 and the capacitor C form a serial resonant circuit on measuring frequency which leads the voltage attenuation of the two elements to approach to zero. The inductor L2 is arranged in the radio interference measuring circuit so as to break over low frequency signals, thereby leading most low frequency signals of the power supply ripple or clutter to pass through the circuit branches which the low frequency signals are in.
Description
Technical field
The utility model relates to a kind of metering circuit, particularly a kind of wideband radio interference metering circuit that is used to measure the ultra-high-tension power transmission line radio interference.
Background technology
Along with socioeconomic fast development, the electric pressure of electrical network also improves constantly.Yet UHV (ultra-high voltage) and UHV transmission line are also more and more to the influence of environment, and it comprises the radio interference that lead and hardware corona produce, the noise that corona causes etc.Along with the raising of transmission voltage, corona disturbs has become outstanding problem.Corona disturbs can be divided into two kinds, the one, the radio interference of transmission line of electricity radiation, this interference is meant that transmission line of electricity is in operation, because corona discharge and intermittent spark discharge that lead, gold utensil, insulator produced are disturbed the antenna generation of radio and cell site; The 2nd, the undesired signal that propagate on road along the line is destroyed high channel and is normally moved work.
The radio interference metering circuit that corona produces is to be used for collecting the radio interference electric current, is used for the radio interference characteristic of lead corona is analyzed.Common radio interference metering circuit is the radio interference electric current of a certain frequency of energy measurement only, and therefore the radio interference electric current of how measuring in the frequency range is a difficult problem.
Summary of the invention
The purpose of this utility model provides a kind of wideband radio interference metering circuit that is used to measure a certain frequency range radio interference on the Ultra-high Voltage Wire.
For achieving the above object, the utility model by the following technical solutions: a kind of radio interference metering circuit, it comprises tunable capacitor C, inductance L
1And inductance L
2, adjustable resistance R
1, sample resistance R
2, and overvoltage protection discharge tube G, it is characterized in that: described tunable capacitor C, inductance L
1, adjustable resistance R
1With sample resistance R
2Series connection back ground connection; Described inductance L
2Be connected in parallel on adjustable resistance R
1With sample resistance R
2Two ends, overvoltage protection discharge tube G is attempted by inductance L
2Two ends.
Described inductance L
2Be the low frequency inductance.
Owing to adopted above technical scheme, the utlity model has following advantage: 1, the resistance R in the utility model
1With capacitor C all be adjustable, can mate different frequencies, therefore make measured value reach a wideer scope.2, the utility model is by inductance L
1Form series resonant circuit with capacitor C, make the voltage attenuation of these two elements approach zero.3, the utility model is provided with an inductance L
2In order to the conducting low frequency signal, the low frequency signal major part in power supply ripple or the clutter is passed through from the branch road at self place.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model
Fig. 2 is the wiring diagram of the utility model in metering circuit
Embodiment
As shown in Figure 1, wideband radio interference metering circuit RI comprises: tunable capacitor C, inductance L
1, inductance L 2, adjustable resistance R
1, sample resistance R
2With overvoltage protection discharge tube G.Tunable capacitor C, inductance L
1, adjustable resistance R
1With sample resistance R
2Series connection back ground connection.Inductance L
2Be connected in parallel on adjustable resistance R
1With sample resistance R
2Two ends, and inductance L
2Be low frequency inductance, the low frequency signal major part in power supply ripple or the clutter is passed through from the branch road at self place in order to the conducting low frequency signal.Overvoltage protection discharge tube G is attempted by inductance L
2Two ends.
As shown in Figure 2, the mode that radio interference metering circuit RI receives on the metering circuit is: one of the tunable capacitor C place of radio interference metering circuit RI terminates on the measured point of circuit-under-test, sample resistance R
2The one end ground connection at place.Direct supply DC negative pole one end ground connection is connected to an inductance L between an anodal end and the measured point.
In the foregoing description, inductance L
1Form series resonant circuit with tunable capacitor C, make the voltage attenuation of these two elements approach zero.For on a plurality of survey frequencies, playing the effect of series resonance, R
1Be adjustable resistance, pass through R
1Dividing potential drop adjust output signal strength.So just make radio interference metering circuit RI of the present utility model can mate different frequencies, therefore make measured value reach a wideer scope.
Claims (2)
1, a kind of radio interference metering circuit, it comprises tunable capacitor C, inductance L
1And inductance L
2, adjustable resistance R
1, sample resistance R
2, and overvoltage protection discharge tube G, it is characterized in that: described tunable capacitor C, inductance L
1, adjustable resistance R
1With sample resistance R
2Series connection back ground connection; Described inductance L
2Be connected in parallel on adjustable resistance R
1With sample resistance R
2Two ends, overvoltage protection discharge tube G is attempted by inductance L
2Two ends.
2, as claim 1 described a kind of radio interference metering circuit, it is characterized in that: described inductance L
2Be the low frequency inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201225074U CN201269908Y (en) | 2008-09-12 | 2008-09-12 | Wide band radio interference measuring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201225074U CN201269908Y (en) | 2008-09-12 | 2008-09-12 | Wide band radio interference measuring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269908Y true CN201269908Y (en) | 2009-07-08 |
Family
ID=40842516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201225074U Expired - Lifetime CN201269908Y (en) | 2008-09-12 | 2008-09-12 | Wide band radio interference measuring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201269908Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364599A (en) * | 2012-03-29 | 2013-10-23 | 北京普源精电科技有限公司 | Probe having attenuating function, signal acquisition system and signal acquisition method |
| CN103684623A (en) * | 2013-12-24 | 2014-03-26 | 三峡大学 | Method and device for inhibiting secondary radiation of medium-wave frequency band ultra-high voltage transmission line loop |
| CN106597141A (en) * | 2016-10-25 | 2017-04-26 | 中国电力科学研究院 | Device and method for measuring radio interference of high-voltage power transmission line |
| CN113960353A (en) * | 2021-10-19 | 2022-01-21 | 合肥科威尔电源系统股份有限公司 | High-precision low-ripple testing device and method for high-voltage power supply |
-
2008
- 2008-09-12 CN CNU2008201225074U patent/CN201269908Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364599A (en) * | 2012-03-29 | 2013-10-23 | 北京普源精电科技有限公司 | Probe having attenuating function, signal acquisition system and signal acquisition method |
| CN103684623A (en) * | 2013-12-24 | 2014-03-26 | 三峡大学 | Method and device for inhibiting secondary radiation of medium-wave frequency band ultra-high voltage transmission line loop |
| CN103684623B (en) * | 2013-12-24 | 2015-06-17 | 三峡大学 | Method and device for inhibiting secondary radiation of medium-wave frequency band ultra-high voltage transmission line loop |
| CN106597141A (en) * | 2016-10-25 | 2017-04-26 | 中国电力科学研究院 | Device and method for measuring radio interference of high-voltage power transmission line |
| CN113960353A (en) * | 2021-10-19 | 2022-01-21 | 合肥科威尔电源系统股份有限公司 | High-precision low-ripple testing device and method for high-voltage power supply |
| CN113960353B (en) * | 2021-10-19 | 2024-05-31 | 科威尔技术股份有限公司 | High-precision low-ripple testing device of high-voltage power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090708 |