CN205846991U - A kind of generating set relay protection system of optically-based current transformer - Google Patents
A kind of generating set relay protection system of optically-based current transformer Download PDFInfo
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- CN205846991U CN205846991U CN201620707422.7U CN201620707422U CN205846991U CN 205846991 U CN205846991 U CN 205846991U CN 201620707422 U CN201620707422 U CN 201620707422U CN 205846991 U CN205846991 U CN 205846991U
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Abstract
The utility model discloses the generating set relay protection system of a kind of optically-based current transformer, including protection equipment for generator, it is separately positioned on the optical current mutual inductor at the leading-out terminal of generator unit stator winding and neutral point side conductor, and the optical transformer collecting unit connected one to one with each optical current mutual inductor, wherein, the outfan of each optical transformer collecting unit connects the input of protection equipment for generator by analog-to-digital conversion module, this utility model solves electromagnetic type CT and installs limited problem in generating set neutral point side, greatly improve the motility of generator protection configuration；This utility model combines quantification internal fault analysis technology; can be that generating set provides effective guarantee; it addition, optical current mutual inductor has without the feature such as saturated, certainty of measurement is high, measurement dynamic range is wide, Transfer characteristic is good, it is also possible to significantly improve differential protection performance.
Description
Technical field
This utility model relates to a kind of generating set protective relaying device, particularly relates to a kind of optically-based current transformer
Generating set relay protection system, belong to intelligent motor protection field.
Background technology
Internal fault of electric generator main protection includes complete longitudinal difference protection, incomplete differential protection, split-phase transverse differential protection, unit
Part transverse differential protections etc., in addition to complete longitudinal difference protection, remaining differential protection is required for gathering branch current.Current multiple-limb generating
Unit mainly has Turbo-generator Set, gas turbine generator group, nuclear power generating sets, turbine-generator units, pumped storage machine
Deng, its main protection configuration is as follows:
1. Turbo-generator Set, gas turbine generator group and nuclear power generating sets: the most double Y-branch units, branch's winding is not
Going out casing, electromagnetic type CT can not be installed in branch, is only capable of installing the transformer measuring neutral point total current.Therefore, only configure
Longitudinal difference protection completely, stator winding inter-turn short circuit failure relaying configuration is weak.
2. turbine-generator units and pumped storage machine: branch's number is more, is limited by installing space and branch's spacing,
General two to three groups that all branches are divided into, then install electromagnetic type CT in each branch group.Owing to each single point can not be obtained
Propping up electric current, differential main protection configuration nevertheless suffers from limiting, and the preferentially main protection scheme after quantification internal fault analysis is the most non-
Optimal main protection scheme.
The primary transducer of optical current mutual inductor can be made into optical cable form, is wrapped in once leading of any shape easily
On body, it is adapted to the demand that conductor diameter in power plant is bigger.Sensing optic cable is little to volume simultaneously, it is possible to achieve small space
Install, be extremely suitable for being arranged in the branch of generator neutral point side, electromagnetic type CT can be solved and limited problem is installed, greatly
Improve generator protection configuration motility.In conjunction with quantification internal fault analysis technology, can be that generating set provides
Excellent main protection scheme.It addition, optical current mutual inductor have without saturated, certainty of measurement is high, measurement dynamic range is wide, the change of disease is special
Property the feature such as good, it is also possible to significantly improve differential protection performance.
Along with the extensive application of optical current mutual inductor in digital transformer substation, optical current mutual inductor is in reliability, steady
Qualitative, certainty of measurement aspect is increasingly mature, have accumulated abundant operating experience, created for its popularization and application in power plant
Profit condition.
Utility model content
Technical problem to be solved in the utility model is that the deficiency for background technology provides a kind of optically-based electricity
The generating set relay protection system of current transformer.
This utility model is for solving above-mentioned technical problem by the following technical solutions
The generating set relay protection system of a kind of optically-based current transformer, including protection equipment for generator, respectively
Be arranged on the optical current mutual inductor at the leading-out terminal of generator unit stator winding and neutral point side conductor, and with each optics electricity
The optical transformer collecting unit that current transformer connects one to one, wherein, the outfan of each optical transformer collecting unit
The input of protection equipment for generator is connected by analog-to-digital conversion module.
Generating set relay protection system the most excellent as a kind of optically-based current transformer of this utility model
Selecting scheme, the neutral point side conductor of described generator unit stator winding is to have the generator unit stator winding of N number of parallel branch
The three-phase conductor of all neutral point branches or optionally M neutral point branch, wherein M=1,2 ... N-1, N are positive integer.
Generating set relay protection system the most excellent as a kind of optically-based current transformer of this utility model
Selecting scheme, the neutral point side conductor of described generator unit stator winding is all K parallel branch groups after combining or optionally L
The three-phase conductor of parallel branch group, wherein L=1,2,3 ... K-1, K are positive integer.
Generating set relay protection system the most excellent as a kind of optically-based current transformer of this utility model
Selecting scheme, the neutral point side conductor of described generator unit stator winding is to have in the generator unit stator winding of N number of parallel branch to appoint
X branch conductors of choosing and Y branch group conductor, wherein X=1 optional in all K parallel branch groups, 2,3 ... N；Y=1,
2,3 ... K, N, K are positive integer.
Generating set relay protection system the most excellent as a kind of optically-based current transformer of this utility model
Selecting scheme, the neutral point side conductor of described generator unit stator winding is the conductor between two neutral points of stator winding.
Generating set relay protection system the most excellent as a kind of optically-based current transformer of this utility model
Selecting scheme, described optical current mutual inductor is full fiber type current transformer.
This utility model uses above technical scheme compared with prior art, has following technical effect that
1. this utility model solves electromagnetic type CT and installs limited problem in generating set neutral point side, improves greatly
The motility of protection equipment for generator；
2. this utility model combines quantification internal fault analysis technology, can be that generating set provides effective guarantee,
It addition, optical current mutual inductor has without the feature such as saturated, certainty of measurement is high, measurement dynamic range is wide, Transfer characteristic is good, it is possible to
To significantly improve differential protection performance.
Accompanying drawing explanation
Fig. 1 is that optical current mutual inductor scheme schematic diagram is installed by the full branch of this utility model；
Fig. 2 is that all branch group of this utility model install optical current mutual inductor scheme schematic diagram；
Fig. 3 is that this utility model installs optical current mutual inductor scheme schematic diagram in branch and branch group simultaneously；
Fig. 4 is that between two neutral points of this utility model, conductor installs optical current mutual inductor mode schematic diagram；
Fig. 5 is this utility model generator protection system configuration diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings the technical solution of the utility model is described in further detail, the art technology people
Member it is understood that unless otherwise defined, all terms used herein (including technical term and scientific terminology) have with
Those of ordinary skill in art of the present invention be commonly understood by identical meaning.Should also be understood that such as general words
Those terms defined in allusion quotation should be understood that have the meaning consistent with the meaning in the context of prior art, and removes
Non-define as here, will not explain by idealization or the most formal implication.
The generating set relay protection system of a kind of optically-based current transformer, including protection equipment for generator, respectively
Be arranged on the optical current mutual inductor at the leading-out terminal of generator unit stator winding and neutral point side conductor, and with each optics electricity
The optical transformer collecting unit that current transformer connects one to one, wherein, the outfan of each optical transformer collecting unit
The input of protection equipment for generator is connected by analog-to-digital conversion module.
Wherein, the neutral point side conductor of generator unit stator winding has following several situation:
(1), for having all neutral point branches of generator unit stator winding of N number of parallel branch or optionally M neutrality
The three-phase conductor of some branch, wherein M=1,2 ... N-1, N are positive integer.
(2), it is all K parallel branch groups after combining or the three-phase conductor of optionally L parallel branch group, wherein L=
1,2,3 ... K-1, K are positive integer.
(3), for having X branch conductors optional in the generator unit stator winding of N number of parallel branch and individual also at all K
Y branch group conductor, wherein X=1 optional in connection branch group, 2,3 ... N；Y=1,2,3 ... K.
(4), the conductor being connected between two neutral points of generator unit stator winding.
Described installs optical current mutual inductor on generating set neutral point side conductor, refers to use following four kinds of light
CT configuration mode:
First kind of way: there is all neutral point branches of generator unit stator winding of N number of parallel branch or optionally M
Installation optical current mutual inductor, wherein M=1 on neutral point branch three-phase conductor, 2 ... N-1；
The second way: according to the combining form of generator unit stator winding neutral point end parallel branch, after combining
Installation optical current mutual inductor, wherein L=1 on all K parallel branch groups or optionally L parallel branch group three-phase conductor, 2,
3…K-1。
The third method: install optics in X branch optional in the generator unit stator winding have N number of parallel branch
Current transformer, in all K parallel branch groups, optionally Y branch group conductor installs optical current mutual inductor, wherein X simultaneously
=1,2,3 ... N；Y=1,2,3 ... K.
4th kind of mode: install optical current mutual inductor on the conductor between two neutral points of stator winding.
Described optical current mutual inductor is full fiber type current transformer, and optical current mutual inductor primary transducer can be made
Become optical cable form, be wrapped in generator neutral point side branch Primary Conductor, be adapted to the need that conductor diameter in power plant is bigger
Ask.By installing optical current mutual inductor at machine end and neutral point branch, machine end and branch current sampled data are delivered to protection
Device, completes various differential protection function.
Illustrate as a example by certain six branch's turbine-generator units, respectively four kinds of mounting means of claim are carried out
It is described as follows:
First kind of way: full branch or element branches install optical current mutual inductor mode.It is illustrated in figure 1 full branch peace
Dress optical current mutual inductor scheme schematic diagram, protection system loads onto one group of optical current mutual inductor 1 at Generator end, in generating
In six branches of machine neutral point, six groups of optical current mutual inductors 2 are installed altogether.Element branches installs optical current mutual inductor scheme
Difference is, according to quantification internal fault analysis result, optionally installs optical current mutual inductance in respective branch
Device, generator protection system framework is identical with full branching aspects.
The second way: all or part of branch group installs optical current mutual inductor mode.It is illustrated in figure 2 all branches
Group installs optical current mutual inductor scheme schematic diagram, constitutes Liang Ge branch after branch three or three combination of six, generator neutral point side
Group, the 1st, 2,3 branches collect composition the 1st branch ancestral, the 4th, 5,6 branches collect composition the 2nd branch group, protection system at two points
Prop up group and two groups of optical current mutual inductors 4 are installed, and at Generator end, one group of optical current mutual inductor 3 is installed.Element branches group
The difference installing optical current mutual inductor scheme is, according to quantification internal fault analysis result, optionally in phase
Answer installation optical current mutual inductor in branch group.
The third mode: simultaneously install current transformer mode in branch and branch group.Assume inside quantification
After accident analysis, need the 1st branch group and the 4th, 5, be respectively mounted optical current mutual inductor in 6 branches, then optical current is mutual
Sensor mount scheme is as shown in Figure 3.Protection system the 4th, 5, be respectively mounted one group of optical current mutual inductor 6, in 6 branches
Optical current mutual inductor group 7 is installed in 1 branch group, and at Generator end, one group of optical current mutual inductor 5 is installed.
4th kind of mode: install optical current mutual inductor mode on the conductor between two neutral points.Assume through fixed
After quantifying internal fault analysis, need the conductor between two neutral points that current transformer group 8 is installed and become transverse differential protection, then light
Learn current transformer mount scheme as shown in Figure 4.
Different optical current mutual inductor mounting means collectively forms completely with corresponding signal pickup assembly, protection device
Generator protection system, its configuration diagram as it is shown in figure 5, all mutual inductor samples produce optical signal deliver to through optical cable
Respective optical transformer collecting unit, collecting unit accesses generator protection after becoming digital quantity signal after analog digital conversion
Device.
The above is only some embodiments of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (6)
1. the generating set relay protection system of an optically-based current transformer, it is characterised in that: include generator protection
Device, is separately positioned on the optical current mutual inductor at the leading-out terminal of generator unit stator winding and neutral point side conductor, Yi Jiyu
The optical transformer collecting unit that each optical current mutual inductor connects one to one, wherein, each optical transformer gathers single
The outfan of unit connects the input of protection equipment for generator by analog-to-digital conversion module.
The generating set relay protection system of a kind of optically-based current transformer the most according to claim 1, its feature
It is: the neutral point side conductor of described generator unit stator winding is the institute at the generator unit stator winding with N number of parallel branch
There are neutral point branch or a three-phase conductor of optionally M neutral point branch, wherein M=1,2 ..., N-1, N are positive integer.
The generating set relay protection system of a kind of optically-based current transformer the most according to claim 1, its feature
It is: the neutral point side conductor of described generator unit stator winding is all K the parallel branch groups after combination or optionally L parallel connection
The three-phase conductor of branch group, wherein L=1,2,3 ..., K-1, K are positive integer.
The generating set relay protection system of a kind of optically-based current transformer the most according to claim 1, its feature
It is: the neutral point side conductor of described generator unit stator winding is to have in the generator unit stator winding of N number of parallel branch optionally
X branch conductors and Y branch group conductor, wherein X=1 optional in all K parallel branch groups, 2,3 ..., N；Y=1,
2,3 ..., K, N, K are positive integer.
The generating set relay protection system of a kind of optically-based current transformer the most according to claim 1, its feature
It is: the neutral point side conductor of described generator unit stator winding is the conductor between two neutral points of stator winding.
6. according to the generating set relay protection system of a kind of optically-based current transformer described in claim 1-5 any one
System, it is characterised in that: described optical current mutual inductor is full fiber type current transformer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620707422.7U CN205846991U (en) | 2016-07-06 | 2016-07-06 | A kind of generating set relay protection system of optically-based current transformer |
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| CN201620707422.7U CN205846991U (en) | 2016-07-06 | 2016-07-06 | A kind of generating set relay protection system of optically-based current transformer |
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| CN205846991U true CN205846991U (en) | 2016-12-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556781A (en) * | 2018-05-31 | 2019-12-10 | 上海航空电器有限公司 | connecting bus bar differential protection function structure of single-channel multi-electric aircraft generator controller |
| CN113702831A (en) * | 2021-09-24 | 2021-11-26 | 南方电网科学研究院有限责任公司 | Test system and test method for power equipment protection device |
-
2016
- 2016-07-06 CN CN201620707422.7U patent/CN205846991U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556781A (en) * | 2018-05-31 | 2019-12-10 | 上海航空电器有限公司 | connecting bus bar differential protection function structure of single-channel multi-electric aircraft generator controller |
| CN110556781B (en) * | 2018-05-31 | 2022-08-12 | 上海航空电器有限公司 | Connecting bus bar differential protection function structure of single-channel multi-electric aircraft generator controller |
| CN113702831A (en) * | 2021-09-24 | 2021-11-26 | 南方电网科学研究院有限责任公司 | Test system and test method for power equipment protection device |
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