CN201134163Y - Corona current measurement mechanism - Google Patents
Corona current measurement mechanism Download PDFInfo
- Publication number
- CN201134163Y CN201134163Y CNU2007201872667U CN200720187266U CN201134163Y CN 201134163 Y CN201134163 Y CN 201134163Y CN U2007201872667 U CNU2007201872667 U CN U2007201872667U CN 200720187266 U CN200720187266 U CN 200720187266U CN 201134163 Y CN201134163 Y CN 201134163Y
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Abstract
The utility model relates to a corona current measurement device, which is characterized by comprising a diverter resistor and an electromagnetic shield device, wherein the diverter resistor is connected with an analogue front circuit module connected with an A/D module, the A/D module is connected with an external remote display processing terminal via an optical fiber communication transmission module, the analogue front circuit module, the A/D module and the optical fiber communication module are powered by a solar energy battery power supply pipeline module, the analogue front circuit module, the A/D module, the optical fiber communication transmission module and the solar energy battery power supply pipeline module are in the electromagnetic shield device. The utility model can protect periphery circuits from the corona onset effect of a test circuit to confirm the normal operation of electric circuits in a measurement box, prevent the cable from breakdown when in power supply, and resolve the problem of high demand on transmission speed of high-frequency pulse signal.
Description
Technical field
The utility model relates to a kind of corona current measurement mechanism, particularly about a kind of corona current measurement mechanism based on optical fiber technology and heliotechnics.
Background technology
Transmission pressure is higher in electric pressure, and the conductive line surfaces electric potential gradient can produce corona discharge when big.The frequency height of corona current can reach megahertz, and effective value is little, for microampere to milliampere the level.Existing lower grade of corona current measurement mechanism applied voltage, and sampling rate is low, and measuring accuracy is poor, can't detect the waveform of corona current clearly, and its power supply adopts accumulator in addition, needs often to change.The long-time energy supply that how the corona current signal is transferred under up to the direct current extra-high voltage environment of 1200kV ground and measurement mechanism is to need the problem that solves.
Summary of the invention
At the problems referred to above, the purpose of this utility model provides a kind of corona current measurement mechanism based on optical fiber technology and heliotechnics that is applied to the extra-high voltage direct-current field.
For achieving the above object, the utility model is by the following technical solutions: a kind of corona current measurement mechanism, it is characterized in that: it comprises a shunt resistance, one electromagnetic screen, described shunt resistance connects an analog front circuit module, described analog front circuit module connects an A/D module, described A/D module is connected to outside distant place display process terminating machine by an optical-fibre communications transport module, described analog front circuit module, A/D module and optical-fibre communications module adopt a solar cell for supplying power pipeline module for power supply, described analog front circuit module, the A/D module, the optical-fibre communications transport module, the solar cell for supplying power administration module is positioned at an electromagnetic screen.
Described optical-fibre communications transport module connects described A/D module and distant place display process terminating machine by the optical fiber that is located in the insulated column.
The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model is owing to be provided with an electromagnetic screen, therefore be positioned at the test circuit of electromagnetic shielding box, can not produce corona owing to the high pressure of metering circuit, can not be subjected to of the interference of outside line corona to test signal yet, guarantee also simultaneously that the test circuit in the electromagnetic shielding box is under the low-pressure state, make that measurement is quite accurate.2, electric supply installation of the present utility model has adopted solar power supply apparatus, not only can save the energy, and the breakdown shortcoming of cable when having avoided adopting cable power supply.3, the sampling apparatus of high-pressure side of the present utility model is connected by the cascaded fiber insulated column with the distant place display process terminating machine of low pressure end, has solved the exigent problem of high-frequency pulse signal to transfer rate.The utility model can detect the waveform of corona current clearly, can be used under direct current extra-high voltage environment the corona current signal being transferred to the operating process of ground and measurement mechanism.
Description of drawings
Fig. 1 is the structural drawing of corona current measurement mechanism
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in detail.
As shown in Figure 1, the utility model structure comprises a shunt resistance 1, shunt resistance 1 is connected to an analog front circuit module 2, analog front circuit module 2 is connected to A/D (analog/digital signal conversion device) module 3, and A/D module 3 is connected to distant place display process terminating machine 5 by optical-fibre communications transport module 4.
In the foregoing description, because analog front circuit module 2, A/D module 3 and optical-fibre communications transport module 4 high side voltage are higher than the supply voltage of device far away, as adopt cable power supply, cable is too near apart from the high-voltage conducting wires distance, can be breakdown, so cable power supply can't be adopted in the high-pressure side, can only consider powered battery, solar powered and laser energy supply, powered battery needs often to change, and laser energy supply cost is too high, so select 6 power supplies of solar cell for supplying power administration module for use.
The utility model also is arranged on an electromagnetic screen 7, and electromagnetic screen 7 the insides are provided with above-mentioned analog front circuit module 2, A/D module 3, optical-fibre communications transport module 4 and solar cell for supplying power administration module 6.
In the foregoing description, because corona current is a high-frequency pulse current, signal transmission rate is required to reach 30M/S, therefore adopt optical-fibre communications transport module 4 to transmit data, optical-fibre communications transport module 4 connects A/D module 3 and distant place display process terminating machine 5 by the optical fiber 8 that is located in the insulated column.
In the foregoing description, during with the utility model measurement mechanism place in circuit, after analog electrical signal is gathered by shunt resistance 1 from high-pressure side, pass to A/D module 3 by analog front circuit module 2, A/D module 3 is a digital signal with analog signal conversion, to optical-fibre communications transport module 4, optical-fibre communications transport module 4 is converted to light signal with digital electric signal and finishes measuring process by the distant place display process terminating machine 5 that optical fiber 8 transfers to low-pressure side by optical fiber 8.
Claims (2)
1, a kind of corona current measurement mechanism, it is characterized in that: it comprises a shunt resistance, one electromagnetic screen, described shunt resistance connects an analog front circuit module, described analog front circuit module connects an A/D module, described A/D module is connected to outside distant place display process terminating machine by an optical-fibre communications transport module, described analog front circuit module, A/D module and optical-fibre communications module adopt a solar cell for supplying power pipeline module for power supply, described analog front circuit module, the A/D module, the optical-fibre communications transport module, the solar cell for supplying power administration module is positioned at an electromagnetic screen.
2, a kind of corona current measurement mechanism shown in claim 1 is characterized in that: described optical-fibre communications transport module connects described A/D module and distant place display process terminating machine by the optical fiber that is located in the insulated column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201872667U CN201134163Y (en) | 2007-12-19 | 2007-12-19 | Corona current measurement mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201872667U CN201134163Y (en) | 2007-12-19 | 2007-12-19 | Corona current measurement mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134163Y true CN201134163Y (en) | 2008-10-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201872667U Expired - Lifetime CN201134163Y (en) | 2007-12-19 | 2007-12-19 | Corona current measurement mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134163Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852825A (en) * | 2010-05-21 | 2010-10-06 | 南方电网技术研究中心 | Wideband online measuring system for corona current of high-voltage transmission line |
| CN102608394A (en) * | 2012-04-01 | 2012-07-25 | 华北电力大学 | Line corona current measurement system and method |
| CN102818928A (en) * | 2011-12-16 | 2012-12-12 | 清华大学 | Current probe-based on-line measuring system for high-frequency corona pulse current on high-voltage line |
| CN103116056A (en) * | 2012-08-07 | 2013-05-22 | 中国电力科学研究院 | High-voltage direct current broadband domain corona current measurement system |
| CN104698265A (en) * | 2015-03-27 | 2015-06-10 | 国家电网公司 | High-voltage direct current transmission line corona loss measurement system |
| CN105388351A (en) * | 2015-10-21 | 2016-03-09 | 中国电力科学研究院 | HVDC line corona current measuring system used in high-altitude area |
-
2007
- 2007-12-19 CN CNU2007201872667U patent/CN201134163Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852825A (en) * | 2010-05-21 | 2010-10-06 | 南方电网技术研究中心 | Wideband online measuring system for corona current of high-voltage transmission line |
| CN101852825B (en) * | 2010-05-21 | 2012-02-22 | 南方电网科学研究院有限责任公司 | Wideband online measuring system for corona current of high-voltage transmission line |
| CN102818928A (en) * | 2011-12-16 | 2012-12-12 | 清华大学 | Current probe-based on-line measuring system for high-frequency corona pulse current on high-voltage line |
| CN102608394A (en) * | 2012-04-01 | 2012-07-25 | 华北电力大学 | Line corona current measurement system and method |
| CN103116056A (en) * | 2012-08-07 | 2013-05-22 | 中国电力科学研究院 | High-voltage direct current broadband domain corona current measurement system |
| CN103116056B (en) * | 2012-08-07 | 2015-05-13 | 中国电力科学研究院 | High-voltage direct current broadband domain corona current measurement system |
| CN104698265A (en) * | 2015-03-27 | 2015-06-10 | 国家电网公司 | High-voltage direct current transmission line corona loss measurement system |
| CN105388351A (en) * | 2015-10-21 | 2016-03-09 | 中国电力科学研究院 | HVDC line corona current measuring system used in high-altitude area |
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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 |
Granted publication date: 20081015 |
|
| CX01 | Expiry of patent term |