CN103346007A - Electronic current transformer of isolation circuit breaker - Google Patents
Electronic current transformer of isolation circuit breaker Download PDFInfo
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- CN103346007A CN103346007A CN2013103185946A CN201310318594A CN103346007A CN 103346007 A CN103346007 A CN 103346007A CN 2013103185946 A CN2013103185946 A CN 2013103185946A CN 201310318594 A CN201310318594 A CN 201310318594A CN 103346007 A CN103346007 A CN 103346007A
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- optical fiber
- current
- transformer
- current transformer
- isolation circuit
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- Gas-Insulated Switchgears (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses an electronic current transformer of an isolation circuit breaker. The electronic current transformer comprises a current transformer, a transformer shell, a remote electronic module, an optical fiber insulator and an optical fiber, wherein the current transformer is installed inside the transformer shell, an optical fiber cable penetrates through the optical fiber insulator, a signal input end of the remote electronic module is connected with a secondary winding side of the current transformer, and a signal output end of the remote electronic module is connected with the optical fiber cable. The electromagnetic interference resistance is strong, the application of a secondary cable of a transformer substation is reduced, the requirement of the technical development of a digitalized transformer substation can be met, the transformer-to-ground insulation performance is guaranteed, and the signal measuring accuracy is improved.
Description
Technical field
The present invention relates to a kind of isolation circuit breakers electronic current mutual inductor, belong to the instrument transformer technical field, be mainly used in electric power system in the supporting use of isolation circuit breakers.
Background technology
At present, along with the continuous development of electric power system, new requirement has been proposed also for the development of new-style electronic instrument transformer.Electronic mutual inductor long-term work under the adverse circumstances out of doors; must stand the test of abominable electromagnetic environment; when especially isolation circuit breakers is opened disjunction; the anti-electromagnetic interference performance that improves the far-end electronic module in electric power system seems particularly important; under abominable electromagnetic environment, in case abnormal conditions such as communication abnormality, sampling be unusual take place, will cause the malfunction of protecting electrical power system.
Summary of the invention
Technical problem to be solved by this invention is the defective that overcomes prior art, a kind of isolation circuit breakers electronic current mutual inductor is provided, its anti-electromagnetic interference capability is strong, reduced the use of substation secondary cable, adapted to the requirement of digital transformer substation technical development, guarantee instrument transformer insulation property over the ground, thereby improved the accuracy of signal measurement.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of isolation circuit breakers electronic current mutual inductor, it comprises current transformer, instrument transformer housing, far-end electronic module, optical fiber insulator and optical fiber, current transformer is installed in the instrument transformer housing, optical fiber cable interts in optical fiber insulator, the signal input part of far-end electronic module is connected with the secondary winding side of current transformer, and the signal output part of far-end electronic module is connected with optical fiber cable.
Further, described instrument transformer housing is the torus structure, and is provided with a plurality of ring-shaped grooves in the instrument transformer housing, and described current transformer is installed on the ring-shaped groove.
Further, the top of described instrument transformer housing is equipped with protective cover.
Further, described current transformer has the low-power iron-core coil of sensing and measuring current and the hollow coil of sensing protective current.
After having adopted technique scheme, the instrument transformer housing directly is fixed to the isolation circuit breakers root, current sensor is used for gathering the current signal that flows through in real time in the isolation circuit breakers, the far-end electronic module is used for handling the current signal that current sensor is gathered, and be sent to it in monitoring and protection system of electric power system by optical fiber cable, characteristics such as that the present invention has is simple and reliable for structure, volume is less, weight is light, the linearity is good, far-end electronic module of the present invention adopts dualization redundant configuration, has guaranteed the reliability of instrument transformer; The present invention utilizes optical fiber cable to transmit signal; antijamming capability is strong; reduced the substation secondary cable; adapted to the requirement of digital transformer substation technical development; the present invention adopts the optical fiber insulator of different electric pressures to guarantee isolation circuit breakers electric mutual inductor insulation property over the ground; in addition; current transformer adopts low-power iron-core coil sensing and measuring current; adopt hollow coil sensing protective current, can make current transformer have higher accuracy of measurement, bigger dynamic range and transient characterisitics preferably like this.
Description of drawings
Fig. 1 is the structural perspective of isolation circuit breakers electronic current mutual inductor of the present invention.
Embodiment
Content of the present invention is easier to be expressly understood in order to make, and according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation below.
As shown in Figure 1, a kind of isolation circuit breakers electronic current mutual inductor, it comprises current transformer, instrument transformer housing 1, far-end electronic module 2, optical fiber insulator 3 and optical fiber, current transformer is installed in the instrument transformer housing 1, optical fiber cable interts in optical fiber insulator 3, the signal input part of far-end electronic module 2 is connected with the secondary winding side of current transformer, and the signal output part of far-end electronic module 2 is connected with optical fiber cable.
As shown in Figure 1, instrument transformer housing 1 is the torus structure, and is provided with a plurality of ring-shaped grooves in the instrument transformer housing 1, and current transformer is installed on the ring-shaped groove, so just can make a plurality of current transformers are installed in the instrument transformer housing 1.
For can electromagnetic compatibility and prevent that rain leakage from entering instrument transformer housing 1 inside, the top of instrument transformer housing 1 be equipped with protective cover 4.
In order to make current transformer have higher accuracy of measurement, bigger dynamic range and transient characterisitics preferably, current transformer has the low-power iron-core coil of sensing and measuring current and the hollow coil of sensing protective current.
Operation principle of the present invention is as follows:
The precision that the present invention measures under the situation of wide temperature can reach the requirement of class of accuracy in the electric power system, and under the lightning impulse situation in the complex electromagnetic environments such as High-frequency Interference, earth potential rising this instrument transformer can be good at satisfying the electromagnetic compatibility characteristic; The sharp pounding that produces when circuit-breaker switching on-off does not all have influence to insulation and the precision of instrument transformer in addition; And be under-40 °～+ 70 ° situations in the temperature that works long hours, the accuracy of its measurement of this instrument transformer is unaffected, can normally operation stably in wide temperature range.
Manufacturing process of the present invention is as follows:
1) current sensor is installed on instrument transformer housing 1 inside, and fixes.
2) protective cover 4 is installed in instrument transformer housing 1 correspondence position and shields.
3) this instrument transformer by being installed, location hole is installed in that the isolation circuit breakers root is used for measuring and the through-flow state of monitoring isolation circuit breakers.
4) by optical fiber the signal of gathering is sent in the monitoring and protection system of electric power system.
Above-described specific embodiment; technical problem, technical scheme and beneficial effect that the present invention is solved further describe; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. isolation circuit breakers electronic current mutual inductor, it is characterized in that: it comprises current transformer, instrument transformer housing (1), far-end electronic module (2), optical fiber insulator (3) and optical fiber, current transformer is installed in the instrument transformer housing (1), optical fiber cable interts in optical fiber insulator (3), the signal input part of far-end electronic module (2) is connected with the secondary winding side of current transformer, and the signal output part of far-end electronic module (2) is connected with optical fiber cable.
2. isolation circuit breakers electronic current mutual inductor according to claim 1, it is characterized in that: described instrument transformer housing (1) is the torus structure, and the instrument transformer housing is provided with a plurality of ring-shaped grooves in (1), and described current transformer is installed on the ring-shaped groove.
3. isolation circuit breakers electronic current mutual inductor according to claim 1 and 2, it is characterized in that: the top of described instrument transformer housing (1) is equipped with protective cover (4).
4. isolation circuit breakers electronic current mutual inductor according to claim 1 and 2, it is characterized in that: described current transformer has the low-power iron-core coil of sensing and measuring current and the hollow coil of sensing protective current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103185946A CN103346007A (en) | 2013-07-26 | 2013-07-26 | Electronic current transformer of isolation circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103185946A CN103346007A (en) | 2013-07-26 | 2013-07-26 | Electronic current transformer of isolation circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103346007A true CN103346007A (en) | 2013-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103185946A Pending CN103346007A (en) | 2013-07-26 | 2013-07-26 | Electronic current transformer of isolation circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN103346007A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887050A (en) * | 2014-03-25 | 2014-06-25 | 国家电网公司 | Mutual inductor device in intelligent substation |
| CN113782326A (en) * | 2021-10-12 | 2021-12-10 | 佛山市明富兴金属材料有限公司 | Bipolar current transformer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11317319A (en) * | 1998-02-09 | 1999-11-16 | Gec Alsthom Ag | Current transformer for gas insulating type switching device |
| CN1661873A (en) * | 2004-02-27 | 2005-08-31 | Abb技术有限公司 | Compact current transformer housing for gas-insulated switchgear |
| CN2786757Y (en) * | 2005-04-14 | 2006-06-07 | 丘镜斌 | A rectangular transformer for safety switchgear |
| CN202093967U (en) * | 2011-03-17 | 2011-12-28 | 苏州西门子电器有限公司 | Current transformer assembly and circuit breaker |
| CN202454432U (en) * | 2011-12-26 | 2012-09-26 | 常州博瑞电力自动化设备有限公司 | Bushing type electronic type current transformer |
| CN102928641A (en) * | 2012-10-31 | 2013-02-13 | 南京江北自动化技术有限公司 | Electronic current transformer |
| CN203397884U (en) * | 2013-07-26 | 2014-01-15 | 常州博瑞电力自动化设备有限公司 | Isolation breaker electronic current transformer |
-
2013
- 2013-07-26 CN CN2013103185946A patent/CN103346007A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11317319A (en) * | 1998-02-09 | 1999-11-16 | Gec Alsthom Ag | Current transformer for gas insulating type switching device |
| CN1661873A (en) * | 2004-02-27 | 2005-08-31 | Abb技术有限公司 | Compact current transformer housing for gas-insulated switchgear |
| CN2786757Y (en) * | 2005-04-14 | 2006-06-07 | 丘镜斌 | A rectangular transformer for safety switchgear |
| CN202093967U (en) * | 2011-03-17 | 2011-12-28 | 苏州西门子电器有限公司 | Current transformer assembly and circuit breaker |
| CN202454432U (en) * | 2011-12-26 | 2012-09-26 | 常州博瑞电力自动化设备有限公司 | Bushing type electronic type current transformer |
| CN102928641A (en) * | 2012-10-31 | 2013-02-13 | 南京江北自动化技术有限公司 | Electronic current transformer |
| CN203397884U (en) * | 2013-07-26 | 2014-01-15 | 常州博瑞电力自动化设备有限公司 | Isolation breaker electronic current transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887050A (en) * | 2014-03-25 | 2014-06-25 | 国家电网公司 | Mutual inductor device in intelligent substation |
| CN113782326A (en) * | 2021-10-12 | 2021-12-10 | 佛山市明富兴金属材料有限公司 | Bipolar current transformer |
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Application publication date: 20131009 |