CN203552926U - Electronic current transformer for disconnecting circuit breaker - Google Patents

Electronic current transformer for disconnecting circuit breaker Download PDF

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Publication number
CN203552926U
CN203552926U CN201320674591.1U CN201320674591U CN203552926U CN 203552926 U CN203552926 U CN 203552926U CN 201320674591 U CN201320674591 U CN 201320674591U CN 203552926 U CN203552926 U CN 203552926U
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CN
China
Prior art keywords
end module
coil
remote end
optical cable
low
Prior art date
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Active
Application number
CN201320674591.1U
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Chinese (zh)
Inventor
罗苏南
须雷
卢为
胡桂平
朱长银
彭韬
李海涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NR Electric Co Ltd
Changzhou NR Electric Power Electronics Co Ltd
Original Assignee
NR Electric Co Ltd
Changzhou NR Electric Power Electronics Co Ltd
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Priority to CN201320674591.1U priority Critical patent/CN203552926U/en
Application granted granted Critical
Publication of CN203552926U publication Critical patent/CN203552926U/en
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Abstract

The utility model discloses an electronic current transformer for a disconnecting circuit breaker. The electronic current transformer comprises air core coils, energy-taking coils, a low-power coil, a far-end module, an optical cable and a suspension insulator, wherein the far-end module is respectively connected with the output ends of the air core coils and the output end of the low-power coil, working power of the far-end module is provided by the energy-taking coils or an external laser device, the far-end module is further connected with the optical cable, output digital signals are transmitted through the optical cable, and the optical cable penetrates through the suspension insulator. The electronic current transformer can be used in integration with the 66kV-750kV disconnecting circuit breaker.

Description

A kind of isolation circuit breakers electronic current mutual inductor
Technical field
The utility model belongs to power transmission and transforming equipment High-Voltage Electrical Appliances field; be particularly related to the electronic current mutual inductor of a kind of 66kV of can be used for~750kV isolation circuit breakers, can be used as electric energy metrical, relaying protection and electric quantity monitoring in 66kV, 110kV, 220kV, 330kV, 500kV and 750kV electric pressure transformer station.
Background technology
Isolation circuit breakers (DCB) is a kind of novel high-pressure device for switching that switch and isolation features are combined, can directly replace traditional circuit breaker (CB)/isolating switch (DS) combination solution, have that floor space is little, failure rate is little, maintenance is few, construction investment is few, power failure and a feature such as maintenance cost is low.Electronic current mutual inductor has that insulation system is simple, volume is little, dynamic range is large, without features such as magnetic saturation, be the substitute products of conventional electromagnetic current transducer.
Existing transforming plant power instrument transformer (comprising electromagnetic transformer and electronic mutual inductor) is all to combine to design and apply for traditional circuit breaker/isolating switch, along with the construction of intelligent substation and the extensive use of isolation circuit breakers, existing instrument transformer can not meet the demands.Based on this kind of consideration, this case produces thus just.
Utility model content
The purpose of this utility model, is to provide a kind of isolation circuit breakers electronic current mutual inductor, its can with the integrated use of 66kV~750kV isolation circuit breakers.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of isolation circuit breakers electronic current mutual inductor, comprises hollow coil, gets energy coil, low-power coil, remote end module, optical cable and suspension insulator, and wherein, described remote end module connects respectively the output of hollow coil and low-power coil; The working power of described remote end module is provided by the laser of getting energy coil or outside; Described remote end module also connects optical cable, and the digital signal of output is transmitted by optical cable, and described optical cable is through suspension insulator.
Above-mentioned current transformer also comprises and is all arranged on high-tension side solenoid housing and remote end module casing, described hollow coil, get can coil and low-power coil be separately fixed in solenoid housing, and the center of solenoid housing is for the once through-flow conductor through isolation circuit breakers, and remote end module is fixed in remote end module casing.
Adopt after such scheme, the utility model solved there is no at present can be mutually integrated with isolation circuit breakers, adapt to the problem of the current transformer of New Generation of Intelligent transformer station growth requirement, isolation circuit breakers of the present utility model with electronic type current transformer have simple in structure, advanced technology, precision is high, temperature stability good, high reliability, adapts to the technical development demand of New Generation of Intelligent transformer station.The utlity model has following characteristics:
(1) the utility model can be integrated together with isolation circuit breakers in actual use easily, and the once through-flow conductor of isolation circuit breakers passes from the solenoid housing center of instrument transformer, is easy to install, and volume is little, lightweight, and advanced technology is reliable;
(2) utilize respectively hollow coil and low-power coil sensing protection current signal and measurement current signal, make the certainty of measurement of current transformer high (meet 0.2S level require), temperature stability good (can normally work-40 ℃~+ 75 ℃ temperature ranges) and have larger dynamic range and transient characterisitics preferably can meet the demand of relaying protection and electric energy metrical simultaneously;
(3) utilize the analog output of remote end module in-site collecting current sensor, and with optical fiber output signal, suspension type optical fiber insulator guarantees insulation, structure &processes is simple, and cost is low, and volume and weight is little, stable insulation, insulation margin is large, without inflammable and explosive hidden danger, has greatly improved the security reliability of electrical network;
(4) working power of remote end module can be provided by the laser of getting energy coil or outside, when primary current is less than certain value, the working power of remote end module is provided by optical cable by outside laser, when primary current is greater than this definite value, the working power of remote end module can provide by coil by getting, and two kinds of supply power modes can realize seamless switching;
(5) dual redundant configuration according to demand in actual use; comprise hollow coil, low-power coil, get can coil and remote end module all can be configured to 2 separate covers; the fault of a set of transducer or remote end module can not affect another set of transducer or remote end module and normally work; and the analog signal of each transducer output is all utilized to dual sampling comparison techniques; comparison in real time, verification two-way sampled value; realize sampling circuit hardware check function; avoided sampling extremely to cause the problem of protection malfunction, reliability is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the integrated morphology schematic diagram of the utility model and isolation circuit breakers.
Embodiment
Below with reference to accompanying drawing, the technical solution of the utility model and beneficial effect are elaborated.
As shown in Figure 1, the utility model provides a kind of isolation circuit breakers electronic current mutual inductor, can with 66kV, 110kV, 220kV, 330kV, 500kV or 750kV isolation circuit breakers support the use, described current transformer comprises solenoid housing 1, hollow coil 2, get energy coil 3, low-power coil 4, remote end module 5, remote end module casing 6, optical cable 7 and suspension insulator 8, wherein, solenoid housing 1 and remote end module casing 6 are all arranged on high-pressure side, in described solenoid housing 1, be fixed with hollow coil 2, get energy coil 3 and low-power coil 4, the center of solenoid housing 1 is in order to the once through-flow conductor through isolation circuit breakers, wherein, hollow coil 2 is for sensing protection current signal, low-power coil 4 is for sensing measurement current signal.
In remote end module casing 6, be fixed with remote end module 5, described remote end module 5 connects respectively the output of hollow coil 2 and low-power coil 4, in-site collecting is also processed the two output signal, utilize the differential signal that hardware Integral Technology is exported hollow coil 2 to carry out integral transformation, make current transformer there are higher certainty of measurement, larger dynamic range and transient characterisitics preferably; Described remote end module 5 also, to each analog input signal design two-way independent sample loop, completes dual sampling.Comparison in real time, verification two-way sampled value, realize sampling circuit hardware check function, avoids sampling extremely to cause protection malfunction; The working power of described remote end module 5 can be provided by the laser of getting energy coil 3 or outside, when primary current is less than certain value, the working power of remote end module 5 is provided by optical cable 7 by outside laser, when primary current is greater than this definite value, the working power of remote end module 5 can provide by coil 3 by getting, and two kinds of supply power modes can realize seamless switching.
Described remote end module 5 also connects optical cable 7, and the digital signal of output is transmitted by optical cable 7, and described optical cable 7 is through suspension insulator 8, and this suspension insulator 8 is for isolating high electronegative potential and protecting optical cable 7.
In the specific implementation, hollow coil 2, low-power coil 4 and remote end module 5 all can carry out dual redundant configuration according to engineering demand, two cover configurations work alone respectively, standby each other, a set of fault can not affect another set of normal work, thereby guarantees the reliability of current transformer.
As shown in Figure 2, when the utility model and isolation circuit breakers are integrated, described solenoid housing 1 is fixed on the middle part of isolation circuit breakers 9, flows through the tested electric current of isolation circuit breakers 9 simultaneously from solenoid housing 1 intermediate flow mistake.Solenoid housing 1 inside is fixed with hollow coil 2, gets energy coil 3 and low-power coil 4; remote end module 5 is fixed on remote end module casing 6 inside; hollow coil 2 sensing protection current signals; low-power coil 4 sensing measurement current signals; remote end module 5 gathers the output signal of hollow coil 2 and low-power coil 4 simultaneously, and the working power of remote end module 5 is provided by external laser or can from primary current inductive energy, provide by coil 3 by getting.Remote end module 5 output signals transmit by optical cable 7, and optical cable 7 is through suspension insulator 8, and suspension insulator 8 is isolated for high-low pressure and protected optical cable 7.
Above embodiment is only explanation technological thought of the present utility model; can not limit protection range of the present utility model with this; every technological thought according to the utility model proposes, any change of doing on technical scheme basis, within all falling into the utility model protection range.

Claims (2)

1. an isolation circuit breakers electronic current mutual inductor, it is characterized in that: comprise hollow coil, get energy coil, low-power coil, remote end module, optical cable and suspension insulator, wherein, described remote end module connects respectively the output of hollow coil and low-power coil; The working power of described remote end module is provided by the laser of getting energy coil or outside; Described remote end module also connects optical cable, and the digital signal of output is transmitted by optical cable, and described optical cable is through suspension insulator.
2. a kind of isolation circuit breakers electronic current mutual inductor as claimed in claim 1, it is characterized in that: described current transformer also comprises and is all arranged on high-tension side solenoid housing and remote end module casing, described hollow coil, get can coil and low-power coil be separately fixed in solenoid housing, and the center of solenoid housing is for the once through-flow conductor through isolation circuit breakers, and remote end module is fixed in remote end module casing.
CN201320674591.1U 2013-10-29 2013-10-29 Electronic current transformer for disconnecting circuit breaker Active CN203552926U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320674591.1U CN203552926U (en) 2013-10-29 2013-10-29 Electronic current transformer for disconnecting circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320674591.1U CN203552926U (en) 2013-10-29 2013-10-29 Electronic current transformer for disconnecting circuit breaker

Publications (1)

Publication Number Publication Date
CN203552926U true CN203552926U (en) 2014-04-16

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104391156A (en) * 2014-11-07 2015-03-04 易能乾元(北京)电力科技有限公司 All-optical fiber current transformer integrated with isolation circuit breaker
CN105336474A (en) * 2015-12-09 2016-02-17 天津市百利纽泰克电气科技有限公司 Low-voltage current transformer based on hollow coil and low-power iron core coil
CN108918943A (en) * 2018-04-16 2018-11-30 北京四方继保自动化股份有限公司 A kind of D.C. high voltage transmission optics direct current measuring devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104391156A (en) * 2014-11-07 2015-03-04 易能乾元(北京)电力科技有限公司 All-optical fiber current transformer integrated with isolation circuit breaker
CN105336474A (en) * 2015-12-09 2016-02-17 天津市百利纽泰克电气科技有限公司 Low-voltage current transformer based on hollow coil and low-power iron core coil
CN108918943A (en) * 2018-04-16 2018-11-30 北京四方继保自动化股份有限公司 A kind of D.C. high voltage transmission optics direct current measuring devices

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