CN203275468U - Novel Rogowski coil for measuring power transmission line fault traveling wave current - Google Patents
Novel Rogowski coil for measuring power transmission line fault traveling wave current Download PDFInfo
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- CN203275468U CN203275468U CN 201320257457 CN201320257457U CN203275468U CN 203275468 U CN203275468 U CN 203275468U CN 201320257457 CN201320257457 CN 201320257457 CN 201320257457 U CN201320257457 U CN 201320257457U CN 203275468 U CN203275468 U CN 203275468U
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Abstract
Provided is a novel Rogowski coil for measuring power transmission line fault traveling wave current. The novel Rogowski coil comprises a skeleton, a winding coil, a coaxial cable, an insulation sleeve pipe, an internal shielding layer, a shielding shell, an integration resistor and a conditioning circuit of the Rogowski coil. The skeleton is an open type arc-shaped insulation skeleton with a return wire groove arranged inside the inner wall of the skeleton. A coil is wound on the skeleton in equal intervals. The top end and the tail end of the winding coil are welded on the coaxial cable. The skeleton and the winding coil are threaded into the insulation sleeve pipe. The external side of the insulation sleeve pipe is wrapped with a copper foil layer or an aluminum foil layer which acts as the internal shielding layer of the Rogowski coil, and then the obtained whole is put into the shielding shell. The output end of the coaxial cable is connected with two ends of the integration resistor, and then the integration resistor is connected with the conditioning circuit. The Rogowski coil is simple in structure and convenient in installation, and has characteristics of being wide in signal measuring range, better in linearity and high in anti-interference capacity.
Description
Technical field
The utility model relates to transmission line travelling wave current detecting correlative technology field, particularly relates to the novel Rogowski coil that the transmission line malfunction travelling wave current is measured.
Background technology
Transmission line of electricity is the highest element of failure rate, and Fault-Locating Test has a very important role for the safe and reliable operation of electric system accurately.The Fault-Locating Test bearing accuracy of row ripple principle is high, have be not subjected to that transition resistance, line construction are asymmetric, circuit corridor landform changes, the factors such as mapping fault of voltage and current mutual inductor affect characteristics, and can be used in DC line and serial compensation capacitance circuit.The Travelling Wave Fault Location technology has obtained rapid progress at aspects such as the extraction of the exploration of new principle, travelling wave signal and analyses in recent years, and high-speed sampling and memory technology is applied to the exploitation of row ripple locating device.
The advantages such as the Rogowski coil has the measurement bandwidth, the linearity is good, simple in structure, antijamming capability is strong are used to the measurement of transmission line malfunction travelling wave current.The Rogowski coil that is used at present the transient state travelling wave current measurements such as lightning current monitoring mostly is closed ring-like monocoque, be that shell is the closed annular metallic shield of aluminium or copper product, when being used for measuring the fault traveling wave that flows through on transmission line of electricity, owing to must making transmission pressure pass closing coil, tested wire is disconnected just can pass the Rogowski coil, bring great inconvenience to installation.
The utility model content
Based on this, be necessary that in prior art the technical matterss such as installation inconvenience of using closed ring-like Rogowski coil to bring provide a kind of Rogowski coil of simple in structure, easy for installation, dependable performance when the transmission line malfunction travelling wave current is measured.
a kind of novel Rogowski coil for the measurement of transmission line malfunction travelling wave current, comprise: the skeleton of Rogowski coil, coiled wire-wound coil, concentric cable, insulating sleeve, internal shield, screening can, integrating resistor, modulate circuit, the coiled wire-wound coil of described Rogowski coil is wrapped on described skeleton, described concentric cable is connected at two ends from beginning to end with described coiled wire-wound coil, described insulating sleeve is wrapped in the skin of described skeleton and described coiled wire-wound coil, described internal shield is wrapped in the skin of described insulating sleeve, described screening can is wrapped in the skin of described insulating sleeve, described integrating resistor is connected with described concentric cable, described modulate circuit is connected with described integrating resistor.
The skeleton of described Rogowski coil is the open type arcuate structure, and the radian scope is pi/2～3 π/4, and its inside radius scope is 50mm～80mm, and the external radius scope is 70mm～100mm, and described inboard wall of skeleton also includes a loop line groove.Described internal shield is Copper Foil or aluminium foil material, and thickness is 0.05mm～0.1mm, consists of double layer screen with described screening can, improves the electromagnetism antijamming capability of Rogowski coil.Described screening can is cold-rolled steel or 316 stainless steels, and has bar to crack in the middle of screening can, and gap width is 1mm～3mm, and cracking can produce induction electromotive force at described coiled wire-wound coil for the electromagnetic field that tested fault traveling wave electric current is produced.Described integrating resistor is coaxial noninductive resistance, resistance 0.1 Ω～1 Ω, described modulate circuit is comprised of voltage follower and second order active high-pass filter, the low-frequency interference signal that is effectively caused by power transmission line power frequency load current etc. in filtering Rogowski coil has improved the signal to noise ratio (S/N ratio) of Rogowski coil output.
Compared with prior art, a kind of novel Rogowski coil for the measurement of transmission line malfunction travelling wave current that the utility model patent proposes, simple in structure, easy for installation and dependable performance, can measure several amperes to the transmission line malfunction travelling wave current of tens Wan An trainings, have the good characteristics such as signal measurement wide ranges, the linearity is better, antijamming capability is strong.
Description of drawings
Fig. 1 is the structural representation of the utility model Rogowski coil
Fig. 2 the utility model Rogowski coil rack and winding mode structural representation.
Fig. 3 is the utility model Rogowski coil screening can structural representation.
Fig. 4 is the utility model Rogowski coil modulate circuit schematic diagram.
In figure, 1. skeleton, 2. coiled wire-wound coil, 3. concentric cable, 4. insulating sleeve, 5. internal shield, 6. crack, 7. pilot hole, 8. screening can, 9. integrating resistor, 10. simulation ground, 11. rp-op amp, 12. one-level filter capacitors, 13. one-level filter resistances, 14. secondary filter electric capacity, 15. secondary filter resistance, 16. homophase operational amplifiers, 17. impedance matching resistance, 18. negative feedback resistors, 19. second order active high-pass filter output terminals.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
In Fig. 1, the output terminal concentric cable of Rogowski coil directly is connected with integrating resistor, and the output signal at integrating resistor two ends is connected with voltage follower, and the output of voltage follower is connected with the second order active high-pass filter again.Integrating resistor and Rogowski coil form the closed-loop path, consist of from integration type Rogowski coil, make integrating resistor output signal and the proportional relation of tested fault traveling wave electric current.Voltage follower makes the prime measured signal be in high-impedance state, makes simultaneously rear class second order active high-pass filter be in low resistive state, and before realizing, " isolation " of late-class circuit, improved the signal to noise ratio (S/N ratio) from the output of integration type Rogowski coil.The second order active high-pass filter is used for the power frequency interference signals that the power frequency load current in filtering the Rogowski coil-induced low-frequency interference signal that arrives, particularly electrical network causes.
In Fig. 2, Rogowski coil rack 1 is the open type arcuate structure, and when being applied to the transmission line malfunction travelling wave current and measuring, aerial condutor just can disconnect and can be directly to pass from coil central authorities.Coiled wire-wound coil 2 first from stem along skeleton 1 inwall loop line groove around to the coil afterbody, then by counterclockwise evenly after the certain number of turn of coiling to stem, the complete rear lead terminal of coiling is welded on concentric cable 3.Skeleton 1 skin is coil winding 2, insulating sleeve 4 and internal shield 5 from the inside to the outside successively, insulating sleeve 4 is for the electric short circuit problem that prevents that internal shield 5 and coiled wire-wound coil 2 from may occur in process, internal shield 5 is aluminium foil or copper foil material, be used for shielding transmission line of electricity electromagnetic environment external electromagnetic field to the electromagnetic interference (EMI) of Rogowski coil, improve its measuring accuracy.
In Fig. 3, the Rogowski coil case cracks 6 for preventing that the electromagnetic field that the transmission line malfunction travelling wave current produces from forming the loop along coiled wire-wound coil 2 directions at metallic shield shell 8, if electromagnetic field forms the loop in metal shell, because the magnetic permeability of metal material is more much larger than the magnetic permeability of air far away, can cause the metallic(return) circuit of flowing through of magnetic flux major part, the induction electromotive force that produces in coiled wire-wound coil 2 can not the tested fault traveling wave electric current of Measurement accuracy just with almost nil.Pilot hole 7 has 4 in a screening can 8, two Rogowski coil racks that are used for fixing internal wherein, and two other passes concentric cable 3 as the output terminal of Rogowski coil.
in Fig. 4, coiled wire-wound coil 2 directly is connected with integrating resistor 9 through concentric cable 3, one end of integrating resistor 9 and the simulation of modulate circuit ground 10 is connected, the output signal of integrating resistor 9 is connected with the negative end of rp-op amp 11, the forward termination of rp-op amp 11 is simulated ground 10, and this connected mode consists of voltage follower, subsequent conditioning circuit is the second order active high-pass filter, the output of voltage follower is connected with an end of one-level filter capacitor 12, the other end of one-level filter capacitor 12 is connected with secondary filter electric capacity with one-level filter resistance 13 and is connected, the other end of one-level filter resistance 13 is connected with the output terminal 19 of second order active high-pass filter, the other end of secondary filter electric capacity 14 is connected with the forward end that secondary filter resistance 15 is connected with the homophase operational amplifier, secondary filter resistance 15 is connected with simulation ground 10, the negative end of homophase operational amplifier 16 is connected with negative feedback resistor with impedance matching resistance 17 and is connected, another termination of impedance matching resistance 17 is simulated ground 10, the other end of negative feedback resistor 18 is connected with the output terminal 19 of second order active high-pass filter.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (6)
1. one kind is used for the novel Rogowski coil that the transmission line malfunction travelling wave current is measured, and it is characterized in that, comprising:
the skeleton of Rogowski coil, coiled wire-wound coil, concentric cable, insulating sleeve, internal shield, screening can, integrating resistor, modulate circuit, the coiled wire-wound coil of described Rogowski coil is wrapped on described skeleton, described concentric cable is connected at two ends from beginning to end with described coiled wire-wound coil, described insulating sleeve is wrapped in the skin of described skeleton and described coiled wire-wound coil, described internal shield is wrapped in the skin of described insulating sleeve, described screening can is wrapped in the skin of described insulating sleeve, described integrating resistor is connected with described concentric cable, described modulate circuit is connected with described integrating resistor.
2. the novel Rogowski coil of measuring for the transmission line malfunction travelling wave current according to claim 1, it is characterized in that, the skeleton of described Rogowski coil is the open type arcuate structure, the radian scope is pi/2～3 π/4, its inside radius scope is 50mm～80mm, the external radius scope is 70mm～100mm, and described inboard wall of skeleton also includes a loop line groove.
3. the novel Rogowski coil for the measurement of transmission line malfunction travelling wave current according to claim 1, is characterized in that, described internal shield is Copper Foil or aluminium foil material, and thickness is 0.05mm～0.1mm.
4. the novel Rogowski coil for the measurement of transmission line malfunction travelling wave current according to claim 1, is characterized in that, described screening can is cold-rolled steel material or 316 stainless steels, and have bar to crack in the middle of screening can, and gap width is 1mm～3mm.
5. the novel Rogowski coil for the measurement of transmission line malfunction travelling wave current according to claim 1, is characterized in that, described integrating resistor is coaxial noninductive resistance, resistance 0.1 Ω～1 Ω.
6. the novel Rogowski coil for the measurement of transmission line malfunction travelling wave current according to claim 1, is characterized in that, described modulate circuit is comprised of voltage follower and second order active high-pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320257457 CN203275468U (en) | 2013-05-13 | 2013-05-13 | Novel Rogowski coil for measuring power transmission line fault traveling wave current |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320257457 CN203275468U (en) | 2013-05-13 | 2013-05-13 | Novel Rogowski coil for measuring power transmission line fault traveling wave current |
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| CN203275468U true CN203275468U (en) | 2013-11-06 |
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| CN 201320257457 Expired - Lifetime CN203275468U (en) | 2013-05-13 | 2013-05-13 | Novel Rogowski coil for measuring power transmission line fault traveling wave current |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237727A (en) * | 2014-09-09 | 2014-12-24 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Transformer near-region short circuit signal monitoring device and short circuit recording analysis method |
| CN104345196A (en) * | 2014-10-30 | 2015-02-11 | 南京信息工程大学 | Active weak power frequency current induction coil |
| CN108490311A (en) * | 2018-03-22 | 2018-09-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Weak impact signal extraction based on power frequency sampling and separation method |
| CN108594312A (en) * | 2018-07-30 | 2018-09-28 | 吉林省电力科学研究院有限公司 | A kind of the grounded screen breakpoint detection device and method of arch form solenoid transmission coil |
| CN112230042A (en) * | 2020-12-11 | 2021-01-15 | 南京汇宁桀信息科技有限公司 | Impulse current detection circuit |
| CN113325265A (en) * | 2021-05-12 | 2021-08-31 | 武汉三相电力科技有限公司 | Device for detecting mixed traveling wave in power transmission line |
| CN113917214A (en) * | 2021-09-22 | 2022-01-11 | 中国船舶工业系统工程研究院 | Self-integration Rogowski coil disc-shaped integral resistor and manufacturing method thereof |
-
2013
- 2013-05-13 CN CN 201320257457 patent/CN203275468U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237727A (en) * | 2014-09-09 | 2014-12-24 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Transformer near-region short circuit signal monitoring device and short circuit recording analysis method |
| CN104237727B (en) * | 2014-09-09 | 2017-01-11 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Transformer near-region short circuit signal monitoring device and short circuit recording analysis method |
| CN104345196A (en) * | 2014-10-30 | 2015-02-11 | 南京信息工程大学 | Active weak power frequency current induction coil |
| CN108490311A (en) * | 2018-03-22 | 2018-09-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Weak impact signal extraction based on power frequency sampling and separation method |
| CN108490311B (en) * | 2018-03-22 | 2020-11-13 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Weak impact signal extraction and separation method based on power frequency sampling |
| CN108594312A (en) * | 2018-07-30 | 2018-09-28 | 吉林省电力科学研究院有限公司 | A kind of the grounded screen breakpoint detection device and method of arch form solenoid transmission coil |
| CN108594312B (en) * | 2018-07-30 | 2024-05-07 | 吉林省电力科学研究院有限公司 | Grounding grid breakpoint detection device and method for arch solenoid transmitting coil |
| CN112230042A (en) * | 2020-12-11 | 2021-01-15 | 南京汇宁桀信息科技有限公司 | Impulse current detection circuit |
| CN113325265A (en) * | 2021-05-12 | 2021-08-31 | 武汉三相电力科技有限公司 | Device for detecting mixed traveling wave in power transmission line |
| CN113917214A (en) * | 2021-09-22 | 2022-01-11 | 中国船舶工业系统工程研究院 | Self-integration Rogowski coil disc-shaped integral resistor and manufacturing method thereof |
| CN113917214B (en) * | 2021-09-22 | 2023-10-27 | 中国船舶工业系统工程研究院 | Self-integration Rogowski coil disc-shaped integration resistor and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Hainan Power Technology Research Institute Document name: Notification to Pay the Fees |
|
| CB03 | Change of inventor or designer information |
Inventor after: Wu Qing Inventor after: Hu Bin Inventor after: Huang Song Inventor after: Chen Qinzhu Inventor after: Yu Yang Inventor before: Wu Qing Inventor before: Hu Bin Inventor before: Huang Song Inventor before: Chen Qinzhu Inventor before: Yu Yang Inventor before: Qian Guanjun Inventor before: Yu Ganghua Inventor before: Zhang Guoqing |
|
| CB03 | Change of inventor or designer information | ||
| CP03 | Change of name, title or address |
Address after: Longhua District of Hainan city in Haikou province 570311 Hai posterior No. 23 Co-patentee after: WUHAN SUNSHINE POWER SCIENCE & TECHNOLOGY Co.,Ltd. Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF HAINAN POWER GRID Co.,Ltd. Address before: 570203 No. 34, Fu Hai Road, Haikou, Hainan Co-patentee before: WUHAN SUNSHINE POWER SCIENCE & TECHNOLOGY Co.,Ltd. Patentee before: Hainan Power Technology Research Institute |
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| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180213 Address after: Longhua District of Hainan city in Haikou province 570311 Hai posterior No. 23 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF HAINAN POWER GRID Co.,Ltd. Address before: Longhua District of Hainan city in Haikou province 570311 Hai posterior No. 23 Co-patentee before: WUHAN SUNSHINE POWER SCIENCE & TECHNOLOGY Co.,Ltd. Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF HAINAN POWER GRID Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
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| CX01 | Expiry of patent term |