CN101377978A - Electronic current transformer device - Google Patents
Electronic current transformer device Download PDFInfo
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- CN101377978A CN101377978A CNA2007101317644A CN200710131764A CN101377978A CN 101377978 A CN101377978 A CN 101377978A CN A2007101317644 A CNA2007101317644 A CN A2007101317644A CN 200710131764 A CN200710131764 A CN 200710131764A CN 101377978 A CN101377978 A CN 101377978A
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- winding
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- transformer device
- voltage
- transformer
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention relates to an electronic type voltage transformer device which consists of a first high voltage outlet terminal, a second measuring class winding, a first conductive body, and a second protection class winding. The electronic type voltage transformer device is characterized in that the second measuring class winding is arranged by adopting a lower energy small iron core coil, a first winding which can generate current I1 and a second winding which can generate current I2 are arranged; the second winding is connected with an integrated element Ra in parallel, which can lead a second output thereof to be a voltage signal; the second current I2 generates a voltage drop Vs on the integrated element Ra, with the amplitude thereof proportional to the first current and in a same phase, thereby leading the internal loss of the transformer and a second power required by the loading to be smaller, and the measuring range thereof to be wider, and the accuracy to be higher. The invention does not have the risk of a second high voltage open circuit of the traditional transformer, and has the advantages of low magnetic flux density, small volume, light weight, low cost, and easy realization for the automation and digitization on measurement and protection.
Description
Technical field: the present invention relates to electronic current transformer device.
Technical background: therefore traditional electromagnetic transformer has limited power system development because volume and weight is big, cost is high, frequency band is narrow, be subjected to electromagnetic interference, output can not be with computer networking, can not realize intelligent control.
Summary of the invention: purpose of the present invention will provide a kind of electronic current transformer device exactly, and it can overcome the existing above defective of traditional electromagnetic transformer well.The object of the present invention is achieved like this; electronic current transformer device is made up of high-voltage terminal end, a secondary measurement level winding, primary conductive body, a second protection level winding; it is characterized in that: it is that the little iron-core coil principle of low energy consumption that adopts is provided with that described secondary is measured the level winding, is provided with a winding and produces electric current I
1And secondary winding produces electric current I
2, the integrated component Ra that is connected in parallel on secondary winding makes its secondary be output as voltage signal, secondary current I
2Produce voltage drop Vs on integrated component Ra, its amplitude is proportional to primary current and same-phase.Thereby make the secondary power of the internal loss of instrument transformer and burden requirement more little, its measuring range is wide more, accuracy is high more.The present invention does not have the danger of the second open circuit high pressure of traditional instrument transformer; Magnetic flux density is low, especially under the environment of high voltage, big electric current; Adopt the Optical Fiber Transmission measurement result, have the good insulation performance performance, under the situation of high pressure, the big electric current of superhigh pressure, can satisfy the requirement of working under the hyperbaric environment; Measure bandwidth, dynamic range is big, makes the accuracy of measuring-signal and bandwidth that obvious improvement arranged, for fault current and the high order harmonic component of measuring and analyze the moment in the bulk power system provides possibility; Volume is little, in light weight, cheap, be easy to realize the automation and the digitlization of measuring and protecting.
Description of drawings: Fig. 1 is a conspectus of the present invention;
1. once winding current I
1, 2. secondary winding electric current I
2, 3. integrated component Ra, 4. voltage drop Vs
Embodiment: the invention will be further described below in conjunction with accompanying drawing;
In the drawings; electronic current transformer device is made up of high-voltage terminal end, a secondary measurement level winding, primary conductive body, a second protection level winding; it is characterized in that: it is that the little iron-core coil principle of low energy consumption that adopts is provided with that described secondary is measured the level winding, is provided with a winding and produces electric current I
11 and secondary winding produce electric current I
22, the integrated component Ra 3 that is connected in parallel on secondary winding makes its secondary be output as voltage signal, secondary current I
22 produce voltage drop Vs 4 on integrated component Ra3, its amplitude is proportional to primary current and same-phase.During concrete enforcement, adopting the little iron-core coil principle of low energy consumption is to comprise little iron core of winding and the minimum secondary winding of loss; Connect integrated component resistance on secondary winding, therefore, its secondary is output as voltage signal.Secondary current produces voltage drop on integrated component resistance, its amplitude is proportional to primary current and same-phase.And the internal loss of instrument transformer and the secondary power of burden requirement are more little, and its measuring range is wide more, accuracy is high more.Secondary is measured the level winding and is adopted the little ironcore choke of low energy consumption to be made; second protection level winding adopts Rogowski coil principle to be made; pass secondary with Primary Conductor then and measure level winding, second protection level winding; at the two ends of Primary Conductor the high-voltage terminal end is set respectively one time again, except that a high-voltage terminal end upper surface outer wrapping by epoxy resin mixed glue and pour into the electronic current mutual inductor that meets the little iron-core coil principle of low energy consumption.
Claims (1)
1. electronic current transformer device is made up of high-voltage terminal end, a secondary measurement level winding, primary conductive body, a second protection level winding; it is characterized in that: it is that the little iron-core coil principle of low energy consumption that adopts is provided with that described secondary is measured the level winding, is provided with a winding and produces electric current I
1(1) and secondary winding produce electric current I
2(2), the integrated component Ra (3) that is connected in parallel on secondary winding makes its secondary be output as voltage signal, secondary current I
2(2) go up generation voltage drop Vs (4) at integrated component Ra (3), its amplitude is proportional to primary current and same-phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101317644A CN101377978A (en) | 2007-08-29 | 2007-08-29 | Electronic current transformer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101317644A CN101377978A (en) | 2007-08-29 | 2007-08-29 | Electronic current transformer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101377978A true CN101377978A (en) | 2009-03-04 |
Family
ID=40421466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101317644A Pending CN101377978A (en) | 2007-08-29 | 2007-08-29 | Electronic current transformer device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101377978A (en) |
-
2007
- 2007-08-29 CN CNA2007101317644A patent/CN101377978A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090304 |