CN102360886A - Electromagnetic and electronic hybrid current transformer - Google Patents
Electromagnetic and electronic hybrid current transformer Download PDFInfo
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- CN102360886A CN102360886A CN2011102437207A CN201110243720A CN102360886A CN 102360886 A CN102360886 A CN 102360886A CN 2011102437207 A CN2011102437207 A CN 2011102437207A CN 201110243720 A CN201110243720 A CN 201110243720A CN 102360886 A CN102360886 A CN 102360886A
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Abstract
The invention relates to an electromagnetic and electronic hybrid current transformer, a conventional electromagnetic iron core secondary winding and a Rogowski coil or a low-power iron core coil are fixed in a metal shielding cover, a primary conductive rod penetrates through the center of the metal shielding cover, the conventional electromagnetic iron core secondary winding is connected with a wire connecting terminal arranged on a base through a cable penetrating through a secondary wire guide pipe, the Rogowski coil or the low-power iron core coil is connected with a shielding signal wire penetrating through the secondary wire guide pipe, and an insulating medium is filled between the high voltage end and the low voltage end of the current transformer. The electromagnetic and electronic hybrid current transformer can fully play the advantages of an electromagnetic current transformer and an electronic current transformer, and solve the problem that the metering legality of an existing electric energy metering device constituted by an electronic transformer with output of digital quantity and a full digital electric energy meter is not recognized by metering supervision departments, electric power enterprises and electric power users.
Description
Technical field
The present invention relates to a kind of current transformer, relate in particular to a kind of electromagnetism, electronics hybrid optoelectronic current transformer.
Background technology
Plurality of advantages such as electronic mutual inductor has that insulation property are good, volume mass is little, safety and environmental protection, transient characterisitics are good, wide frequency range, antijamming capability are strong are the developing direction of instrument transformer technology.Through studying for a long period of time both at home and abroad and trying out, electronic mutual inductor has got into the practicability stage at present, and electronic mutual inductor extensively operates in all kinds of the electrical power trans mission/distribution systems.According to the high-pressure side of electronic current mutual inductor needs power supply whether, electronic mutual inductor is divided into two kinds of active formula and passive types.It is generally acknowledged passive electrical minor current transformer in the past based on faraday (Faraday) magneto optical effect, the transducer of measuring primary current can adopt block glass or full optical fiber dual mode; Adopt Rogowsky (Rogowski) coil or low-power iron-core coil (LPCT) to classify as the active electronic current transformer in the past usually as the electronic mutual inductor of measuring transducer; Because they are all based on electromagnetic induction principle; The voltage signal that common requirement is exported transducer at high-pressure side is sampled and is converted digital signal into; Signal gathering unit and power supply thereof require to be arranged in the high-pressure side of instrument transformer, through optical fiber digital signal are sent to low-pressure side supply capability second protection, observing and controlling and metering system then.The active electronic current transformer that adopts Rogowsky coil or low-power iron-core coil is that the signal gathering unit of high-pressure side provides power supply that dual mode is arranged usually, and a kind of is to get and can supply power by coil through primary current; Another kind is to adopt high power laser power supply in low-pressure side, through the signal gathering unit power supply of optical fiber to high-pressure side.The active electronic current transformer has following obvious deficiency:
1) electronic devices and components such as signal gathering unit and power supply circuits thereof are arranged in high-pressure side, are in the strong jamming and the hot environment of high voltage, big electric current, and the interference free performance and life-span of electronic circuit and components and parts proposed very high requirement;
2) signal gathering unit and power supply circuits are in high-pressure side, and directly ground connection is in the electric potential floating state, anti-interference design of electronic circuits are required harsh;
3) the high power laser power supply cost for the signal gathering unit power supply is high, and useful life is generally shorter;
4) Laser Power Devices can switch the undesired output that causes electronic mutual inductor when supplying power easily by coil with getting.
For overcoming the problems referred to above of active electronic transformer, some producers develop passive electrical minor current transformer, its insulation system and the conventional electromagnetic current transducer basically identical that adopts Rogowsky coil or low-power iron-core coil both at home and abroad.Whole electronic circuits (comprising collecting unit and power supply thereof) of this passive electrical minor current transformer based on electromagnetic induction principle are in low-pressure end; Avoided electronic circuit to be in the strong jamming and the hot environment of high voltage, big electric current; And can ground connection; Make collecting unit and power supply thereof have stronger antijamming capability; Its supply power mode can adopt reliable direct current or AC power directly to supply power arbitrarily, need not use the high power laser power supply power supply, and the maintenance and the maintenance of collecting unit and power supply thereof is convenient in this design simultaneously.
But the passive electrical minor current transformer that adopts Rogowsky coil or low-power iron-core coil is in measurement stability, reliability, and aspects such as useful life are compared with the electromagnetic current transducer of routine, also have gap.
The particularly important is; The metering instrument transformer is as the measurement instrument of state compulsion calibrating; " Measurement Law of the People's Republic of China " and supporting law thereof, rules have strict administrative provisions, and relevant country, industry technology standard also have clear and definite specification requirement to metering instrument transformer and secondary circuit thereof.At present, the metering legitimacy of the electric power meter of being made up of electronic mutual inductor be not measured as yet supervision department and electric power enterprise, power consumer approval still must be used conventional electromagnetic current transducer in the electric power meter of acquire full legal force.
Summary of the invention
In order to give full play to the advantage of electromagnetic current transducer and electronic current mutual inductor; Solve electronic current mutual inductor as the problem of measurement instrument in existence aspect the management of electric power meter and the specification requirement; The invention provides a kind of electromagnetism, electronics hybrid optoelectronic current transformer; With conventional electromagnetic type iron core secondary coil; Rogowsky coil or low-power iron-core coil are fixed in the metallic shield, and the primary conductive bar passes the center of metallic shield, and the cable of conventional electromagnetic type iron core secondary coil through passing the secondary conduit is connected with binding post on being arranged at base; Rogowsky coil or low-power iron-core coil are connected with the shielded signal wire of passing the secondary conduit, between the high voltage end of current transformer and low-voltage end, are filled with dielectric.
The present invention gives full play to the advantage of electromagnetic current transducer and electronic current mutual inductor, the metering legitimacy that has solved at present the electric power meter of forming with the electronic mutual inductor of digital quantity output and the full digital electric energy meter problem that supervision department and electric power enterprise, power consumer are approved that is not measured as yet.
Description of drawings
Fig. 1 is electromagnetism, the electronics hybrid optoelectronic current transformer structural representation of the embodiment of the invention 1.
Fig. 2 is electromagnetism, the electronics hybrid optoelectronic current transformer structural representation of the embodiment of the invention 2.
Embodiment
Specify a kind of electromagnetism of the present invention, electronics hybrid optoelectronic current transformer below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1; A kind of electromagnetism of the present invention, electronics hybrid optoelectronic current transformer; With conventional electromagnetic type iron core secondary coil 1; Rogowsky coil 2 is fixed in the metallic shield 5, and primary conductive bar 4 passes the center of metallic shield 5, and the cable 8 of conventional electromagnetic type iron core secondary coil 1 through passing secondary conduit 6 is connected with binding post 11 on being arranged at base 10; Rogowsky coil 2 is connected with the shielded signal wire of passing secondary conduit 67, between the high voltage end of current transformer and low-voltage end, is filled with dielectric 9.
Dielectric 9 can be SF
6Gas or transformer oil.
The electric current of conventional electromagnetic type iron core secondary coil 1 output and the proportional relation of current value of primary winding are output as the current value of 1A, 2A, 5A or other numerical value.
Electromagnetism of the present invention, electronics hybrid optoelectronic current transformer can also be provided with signal gathering unit 12 by base 10, and the shielded signal wire 7 of Rogowsky coil 2 through passing secondary conduit 6 is connected with signal gathering unit 12 on being arranged at base 10.Signal gathering unit 12 can convert the voltage analog signal of Rogowsky coil 2 outputs into voltage digital signal.
Embodiment 2
As shown in Figure 2; A kind of electromagnetism of the present invention, electronics hybrid optoelectronic current transformer; With conventional electromagnetic type iron core secondary coil 1; Low-power iron-core coil 3 is fixed in the metallic shield 5, and primary conductive bar 4 passes the center of metallic shield 5, and the cable 8 of conventional electromagnetic type iron core secondary coil 1 through passing secondary conduit 6 is connected with binding post 11 on being arranged at base 10; Low-power iron-core coil 3 is connected with the shielded signal wire of passing secondary conduit 67, between the high voltage end of current transformer and low-voltage end, is filled with dielectric 9.
Dielectric 9 can be SF
6Gas or transformer oil.
The electric current of conventional electromagnetic type iron core secondary coil 1 output and the proportional relation of current value of primary winding are output as the current value of 1A, 2A, 5A or other numerical value.
Electromagnetism of the present invention, electronics hybrid optoelectronic current transformer can also be provided with signal gathering unit 12 by base 10, and the shielded signal wire 7 of low-power iron-core coil 3 through passing secondary conduit 6 is connected with signal gathering unit 12 on being arranged at base 10.Signal gathering unit 12 can convert the voltage analog signal of low-power iron-core coil 3 outputs into voltage digital signal.
Claims (4)
1. an electromagnetism, electronics hybrid optoelectronic current transformer; It is characterized in that; With conventional electromagnetic type iron core secondary coil; Rogowsky coil or low-power iron-core coil are fixed in the metallic shield, and the primary conductive bar passes the center of metallic shield, and the cable of conventional electromagnetic type iron core secondary coil through passing the secondary conduit is connected with binding post on being arranged at base; Rogowsky coil or low-power iron-core coil are connected with the shielded signal wire of passing the secondary conduit, between the high voltage end of current transformer and low-voltage end, are filled with dielectric.
2. a kind of electromagnetism as claimed in claim 1, electronics hybrid optoelectronic current transformer is characterized in that described dielectric is SF
6Gas or transformer oil.
3. a kind of electromagnetism as claimed in claim 1, electronics hybrid optoelectronic current transformer is characterized in that described cable is a shielded type cable.
4. like described any one electromagnetism of claim 1 to 3, electronics hybrid optoelectronic current transformer; It is characterized in that; Also comprise the signal gathering unit that is arranged on the base, Rogowsky coil or the low-power iron-core coil shielded signal wire through passing the secondary conduit is connected with signal gathering unit on being arranged at base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102437207A CN102360886A (en) | 2011-08-24 | 2011-08-24 | Electromagnetic and electronic hybrid current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102437207A CN102360886A (en) | 2011-08-24 | 2011-08-24 | Electromagnetic and electronic hybrid current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102360886A true CN102360886A (en) | 2012-02-22 |
Family
ID=45586174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102437207A Pending CN102360886A (en) | 2011-08-24 | 2011-08-24 | Electromagnetic and electronic hybrid current transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN102360886A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065766A (en) * | 2012-12-14 | 2013-04-24 | 常州东芝舒电变压器有限公司 | Plug-in type cable lifting seat |
| CN103543312A (en) * | 2013-10-22 | 2014-01-29 | 江苏靖江互感器厂有限公司 | Passive Rogowski coil electronic current transformer applied to GIS |
| CN111936869A (en) * | 2018-04-06 | 2020-11-13 | 伊顿智能动力有限公司 | Rogowski coil with low permeability core |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3668513A (en) * | 1970-03-31 | 1972-06-06 | Tokyo Shibaura Electric Co | Upright type bushing current transformer |
| CN2257957Y (en) * | 1995-04-14 | 1997-07-16 | 上海Mwb互感器有限公司 | Independent sulfur hexafluoride mutual inductor |
| CN201134349Y (en) * | 2007-12-29 | 2008-10-15 | 武汉格蓝若光电互感器有限公司 | Novel high-voltage combined independent electronic current, voltage mutual inductor |
| CN201332016Y (en) * | 2009-01-05 | 2009-10-21 | 熊江咏 | Electronic type current transformer for digital transformer substation |
| CN201570364U (en) * | 2009-09-21 | 2010-09-01 | 江苏思源赫兹互感器有限公司 | Electronic type current transformer |
| CN201717117U (en) * | 2010-07-06 | 2011-01-19 | 广东四会互感器厂有限公司 | 10 kV electronic electromagnetic current transformer |
| CN202189673U (en) * | 2011-08-24 | 2012-04-11 | 云南电力试验研究院(集团)有限公司 | Electromagnetism-electron mixing current transformer |
-
2011
- 2011-08-24 CN CN2011102437207A patent/CN102360886A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3668513A (en) * | 1970-03-31 | 1972-06-06 | Tokyo Shibaura Electric Co | Upright type bushing current transformer |
| CN2257957Y (en) * | 1995-04-14 | 1997-07-16 | 上海Mwb互感器有限公司 | Independent sulfur hexafluoride mutual inductor |
| CN201134349Y (en) * | 2007-12-29 | 2008-10-15 | 武汉格蓝若光电互感器有限公司 | Novel high-voltage combined independent electronic current, voltage mutual inductor |
| CN201332016Y (en) * | 2009-01-05 | 2009-10-21 | 熊江咏 | Electronic type current transformer for digital transformer substation |
| CN201570364U (en) * | 2009-09-21 | 2010-09-01 | 江苏思源赫兹互感器有限公司 | Electronic type current transformer |
| CN201717117U (en) * | 2010-07-06 | 2011-01-19 | 广东四会互感器厂有限公司 | 10 kV electronic electromagnetic current transformer |
| CN202189673U (en) * | 2011-08-24 | 2012-04-11 | 云南电力试验研究院(集团)有限公司 | Electromagnetism-electron mixing current transformer |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065766A (en) * | 2012-12-14 | 2013-04-24 | 常州东芝舒电变压器有限公司 | Plug-in type cable lifting seat |
| CN103065766B (en) * | 2012-12-14 | 2015-12-09 | 常州东芝舒电变压器有限公司 | Plug-in type cable raises seat |
| CN103543312A (en) * | 2013-10-22 | 2014-01-29 | 江苏靖江互感器厂有限公司 | Passive Rogowski coil electronic current transformer applied to GIS |
| CN103543312B (en) * | 2013-10-22 | 2016-09-14 | 江苏靖江互感器厂有限公司 | A kind of passive Rogowski coil electronic current mutual inductor for GIS |
| CN111936869A (en) * | 2018-04-06 | 2020-11-13 | 伊顿智能动力有限公司 | Rogowski coil with low permeability core |
| CN111936869B (en) * | 2018-04-06 | 2024-02-23 | 伊顿智能动力有限公司 | Rogowski coil with low permeability core |
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Application publication date: 20120222 |