CN207851213U - Low current fault wire selection system based on piezoelectric ceramics voltage acquisition - Google Patents
Low current fault wire selection system based on piezoelectric ceramics voltage acquisition Download PDFInfo
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- CN207851213U CN207851213U CN201820322113.7U CN201820322113U CN207851213U CN 207851213 U CN207851213 U CN 207851213U CN 201820322113 U CN201820322113 U CN 201820322113U CN 207851213 U CN207851213 U CN 207851213U
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Abstract
The utility model provides a kind of low current fault wire selection system based on piezoelectric ceramics voltage acquisition, including：Electric power cable, zero sequence current mutual inductor, aerial condutor, piezoelectric ceramic type voltage transformer, wave tracer, low current fault line selection apparatus and processor；Piezoelectric ceramic type voltage transformer acquires circuit phase-to-ground voltage, circuit zero-sequence current when zero sequence current mutual inductor acquires line fault, when the transition of circuit zero-sequence current or circuit phase-to-ground voltage is more than the trigger value of wave tracer, pass through wave tracer recording voltage, current waveform, by the electric current of record, voltage waveform data is transmitted to processor, convenient for processor according to electric current, voltage waveform failure judgement type, in turn by faulty line signal transmission to low current fault line selection apparatus, it can be provided including circuit zero-sequence current for the accurate analysis of faulty line, sufficient data including circuit phase-to-ground voltage are supported, it can be used as the supplementary means of line selection device for low current route selection.
Description
Technical field
The utility model is related to technical field of electric power more particularly to a kind of low current events based on piezoelectric ceramics voltage acquisition
Hinder wire selection system.
Background technology
10kV, 35kV distribution line are as the end of power grid and the power supply of Electricity customers, and reliable, stable operation is to electricity
It is most important for the production of the power supply reliability and Electricity customers of net.When singlephase earth fault occurs for distribution line, need
The circuit to break down is accurately determined out, corresponding safety measure is cut off and take when carrying out anxious to the circuit to break down,
To avoid being further exacerbated by for failure.
In the prior art, generally use low current fault line selection apparatus determines the circuit to break down.Low current event
Barrier line selection apparatus is that one kind being mounted on substation, a kind of prison when single-phase earthing occurs for distribution line for judging line fault
Measurement equipment.Currently, low current fault line selection apparatus in the market usually using the zero-sequence current of faulty line is flowed to from circuit
Busbar, and the zero-sequence current of non-fault line is to flow to circuit from busbar, the direction of the two on the contrary, and faulty line zero sequence
Electric current will lag behind the characteristics of 90 ° of residual voltage to determine faulty line.
However in practice, since the zero-sequence current generated when distribution line single-phase earthing is system capacitive current, numerical value
Very small, this makes the detection method sensitivity based on zero-sequence current and residual voltage relatively low, in addition, rely solely on zero-sequence current and
Residual voltage is difficult the accurate judgement realized to faulty line, the multi-party face data of distribution line is only combined, by a variety of criterions
Mutual supplement with each other's advantages, erroneous judgement caused by single criterion can be reduced.Therefore, existing low current fault line selection apparatus can not be event
The data for hindering the accurate analysis offer abundance of circuit are supported.
Utility model content
The purpose of this utility model is to provide a kind of low current fault wire selection system based on piezoelectric ceramics voltage acquisition,
Asking for sufficient data support can not be provided to solve existing low current fault line selection apparatus for the accurate analysis of faulty line
Topic.
The utility model provides a kind of low current fault wire selection system based on piezoelectric ceramics voltage acquisition, including：
Electric power cable, zero sequence current mutual inductor, aerial condutor, piezoelectric ceramic type voltage transformer, wave tracer, small electricity
Flow fault line selection device and processor；
The electric power cable includes A phases busbar, B phases busbar and C phase busbares；The aerial condutor includes and the A phases
First aerial condutor of busbar connection, the second aerial condutor being connect with the B phases busbar, and connect with the C phases busbar
Third aerial condutor；The piezoelectric ceramic type voltage transformer includes the first piezoelectric ceramic type voltage transformer, the second piezoelectricity
Ceramic-type voltage transformer and third piezoelectric ceramic type voltage transformer；
The A phases busbar, B phases busbar, C phase busbares constitute three-core cable, and the zero sequence current mutual inductor is sheathed on described
The periphery of three-core cable, the zero sequence current mutual inductor are connect with the wave tracer；
The top of the first piezoelectric ceramic type voltage transformer is connect with first aerial condutor, bottom extraction voltage
Tap；The top of the second piezoelectric ceramic type voltage transformer is connect with second aerial condutor, and bottom extraction voltage is taken out
Head；The top of the third piezoelectric ceramic type voltage transformer is connect with the third aerial condutor, bottom extraction voltage tap；
The first piezoelectric ceramic type voltage transformer, the second piezoelectric ceramic type voltage transformer and the third piezoelectric ceramics
The voltage tap of formula voltage transformer is connect with the wave tracer respectively；
The wave tracer is connected to the processor, and the processor connects with the low current fault line selection apparatus
It connects.
Optionally, the electric power cable further includes ground wire, and the ground wire is described positioned at the side of the three-core cable
Ground wire is across the zero sequence current mutual inductor.
Optionally, the zero sequence current mutual inductor is connect by insulated conductor with the wave tracer.
Optionally, the voltage class of the insulated conductor is 0.6~1KV.
Optionally, the second piezoelectric ceramic type voltage transformer and the third piezoelectric ceramic type voltage transformer
Voltage tap is connect by coaxial cable with the wave tracer respectively.
By above technical scheme it is found that a kind of low current event based on piezoelectric ceramics voltage acquisition provided by the utility model
Hinder wire selection system, including：Electric power cable, zero sequence current mutual inductor, aerial condutor, piezoelectric ceramic type voltage transformer, waveform note
Record instrument, low current fault line selection apparatus and processor；Circuit phase-to-ground voltage is acquired by piezoelectric ceramic type voltage transformer,
Circuit zero-sequence current when zero sequence current mutual inductor acquires line fault, when the transition of circuit zero-sequence current or circuit phase-to-ground voltage
More than wave tracer trigger value when, can be by wave tracer recording voltage, current waveform, and by the electric current of record, electricity
Corrugating data transmission is to processor, convenient for processor according to above-mentioned electric current, voltage waveform come failure judgement type, and then will be former
Barrier line signal is transmitted to low current fault line selection apparatus, the small electricity provided by the utility model based on piezoelectric ceramics voltage acquisition
Failure line selection system is flowed, can provide for the accurate analysis of faulty line and exist including circuit zero-sequence current, circuit phase-to-ground voltage
Interior sufficient data are supported, as the supplementary means of line selection device for low current route selection, by the various aspects for combining distribution line
Data judge the mutual supplement with each other's advantages of a variety of criterions to reduce by accident caused by single criterion.
Description of the drawings
It, below will be to attached drawing needed in the embodiment in order to illustrate more clearly of the technical solution of the utility model
It is briefly described, it should be apparent that, for those of ordinary skills, in the premise of not making the creative labor property
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of showing for low current fault wire selection system based on piezoelectric ceramics voltage acquisition provided by the utility model
It is intended to.
Fig. 2 is the zero of a kind of low current fault wire selection system based on piezoelectric ceramics voltage acquisition provided by the utility model
The scheme of installation of sequence current transformer.
It illustrates：1- electric power cables, 2- zero sequence current mutual inductors, 3- aerial condutors, 4- piezoelectric ceramic type mutual induction of voltage
Device, 5- insulated conductors, 6- wave tracers, 7- coaxial cables, 8- low current fault line selection apparatus, 9- processors, 10- tri- cores electricity
Cable, 11-A phase busbares, 12-B phase busbares, 13-C phase busbares, 14- ground wires, the first aerial condutors of 31-, 32- second is aerial to be led
Line, 33- third aerial condutors, 41- the first piezoelectric ceramic type voltage transformers, 42- the second piezoelectric ceramic type voltage transformers,
43- third piezoelectric ceramic type voltage transformers.
Specific implementation mode
It please refers to Fig.1 to Fig. 2, the utility model embodiment provides a kind of low current event based on piezoelectric ceramics voltage acquisition
Hinder wire selection system, including：Electric power cable 1, zero sequence current mutual inductor 2, aerial condutor 3, piezoelectric ceramic type voltage transformer 4, wave
Shape recorder 6, low current fault line selection apparatus 8 and processor 9.
Wherein, the electric power cable 1 includes A phases busbar 11, B phases busbar 12 and C phases busbar 13, in the present embodiment institute
It is three-phase four-wire system transmission line of electricity to state electric power cable 1.The aerial condutor 3 includes the first being connect with the A phases busbar 11
Hollow wire 31, the second aerial condutor 32 being connect with the B phases busbar 12, and the third frame that is connect with the C phases busbar 13
Hollow wire 33.
The piezoelectric ceramic type voltage transformer 4 includes the first piezoelectric ceramic type voltage transformer 41, the second piezoelectric ceramics
Formula voltage transformer 42 and third piezoelectric ceramic type voltage transformer 43.In addition, the first piezoelectric ceramic type mutual induction of voltage
Device 41, the second piezoelectric ceramic type voltage transformer 42 and third piezoelectric ceramic type voltage transformer 43 can also be substituted for other
The voltage transformer of form.This Shen embodiment uses piezoelectric ceramic type voltage transformer compared with the mutual inductor of other forms, at
This is lower, and convenient for the substation that puts into operation, and when installation is only equivalent to increase a support insulator, easy for installation.
Wherein, the A phases busbar 11, B phases busbar 12, C phases busbar 13 constitute three-core cable 10, the zero sequence current mutual inductance
Device 2 is sheathed on the periphery of the three-core cable 10, and the zero sequence current mutual inductor 2 is connect with the wave tracer 6.In this reality
It applies in example, the zero sequence current mutual inductor 2 can be stuck in the electricity of the three-core cable 10 when the zero sequence current mutual inductor 2 is installed
Cable end lower part.In addition, the electric power cable 1 further includes ground wire 14, the ground wire 14 is located at the one of the three-core cable 10
Side, the ground wire 14 pass through the zero sequence current mutual inductor 2, wherein the zero sequence current mutual inductor 2 passes through insulated conductor 5
It is connect with the wave tracer 6, the zero-sequence current data for acquiring the zero sequence current mutual inductor 2 is transmitted to the wave
Shape recorder 6 is recorded.
Since the size of faulty line zero-sequence current is equal to the sum of the zero-sequence current of all non-fault lines, faulty line zero
The zero-sequence current direction of sequence current direction and non-fault line is on the contrary, the zero sequence electricity that therefore zero sequence current mutual inductor 2 acquires
Whether flow data can be used for carrying out breakdown judge according to current direction, to screen for this line fault.In the present embodiment, described
Insulated conductor 5 is low-voltage insulation conducting wire, and voltage class is 0.6~1KV.
Specifically, the top of the first piezoelectric ceramic type voltage transformer 41 is connect with first aerial condutor 31,
Bottom extraction voltage tap, the phase-to-ground voltage for acquiring the first aerial condutor 31.The second piezoelectric ceramic type voltage is mutual
The top of sensor 42 is connect with second aerial condutor 32, bottom extraction voltage tap, for acquiring the second aerial condutor 32
Phase-to-ground voltage.The top of the third piezoelectric ceramic type voltage transformer 43 is connect with the third aerial condutor 33, bottom
Portion's extraction voltage tap, the phase-to-ground voltage for acquiring third aerial condutor 33.In the present embodiment, the first piezoelectricity pottery
Porcelain formula voltage transformer 41, the second piezoelectric ceramic type voltage transformer 42 and the third piezoelectric ceramic type mutual induction of voltage
Device 43 can distinguish the first aerial condutor 31, second aerial condutor 32 and the third aerial condutor 33 described in continuous acquisition
Phase-to-ground voltage.
The first piezoelectric ceramic type voltage transformer 41, the second piezoelectric ceramic type voltage transformer 42 and described
The voltage tap of third piezoelectric ceramic type voltage transformer 43 is connect with the wave tracer 6 respectively, is used for described first
The phase-to-ground voltage data transmission of aerial condutor 31, second aerial condutor 32 and the third aerial condutor 33 is to described
Wave tracer 6 is recorded.In the present embodiment, the second piezoelectric ceramic type voltage transformer 42 and the third pressure
The voltage tap of electroceramics formula voltage transformer 43 is connect by coaxial cable 7 with the wave tracer 6 respectively.
Further, the wave tracer 6 is connect with the processor 9, the processor 9 and the low current fault
Line selection apparatus 8 connects.The wave tracer 6 can be by first aerial condutor 31 of record, second aerial condutor 32
And the zero-sequence current that the phase-to-ground voltage data and the zero sequence current mutual inductor 2 of the third aerial condutor 33 acquire
Data transmission is to the processor 9, convenient for the processor 9 according to above-mentioned electric current, voltage waveform come failure judgement type, in turn
By faulty line signal transmission to low current fault line selection apparatus 8.
It is emphasized that the application is only related to through a kind of new hardware architecture, for faulty line it is accurate analyze to
Processor 9 provides the sufficient data including circuit zero-sequence current, circuit phase-to-ground voltage and supports, the skill that the application solves
The hardware architecture connection relation of art problem being also only limitted to through the system, it can not be faulty line to solve existing hardware framework
Accurate analysis provides the problem of sufficient data are supported, is not related to the improvement to program the application of processor 9, i.e. the application
Solve the software program that technical problem does not need to use processor 9.
In the present embodiment, the wave tracer 6 is in standby in circuit normal operation, if event occurs for circuit
When barrier, first aerial condutor 31, second aerial condutor 32 and the third aerial condutor 33 phase-to-ground voltage
The transition for the zero-sequence current data that data and the zero sequence current mutual inductor 2 acquire is more than the triggering of the wave tracer 6
It is worth, then the wave tracer 6 starts the first aerial condutor 31, second aerial condutor 32 and institute described in simultaneously synchronous recording
State the phase-to-ground voltage waveform of third aerial condutor 33 and the zero-sequence current waveform of the acquisition of the zero sequence current mutual inductor 2.This
Outside, it also may be selected to trigger the wave tracer 6 manually to record first aerial condutor 31, second aerial condutor 32
And the zero-sequence current that the phase-to-ground voltage waveform and the zero sequence current mutual inductor 2 of the third aerial condutor 33 acquire
Waveform.The above-mentioned function of the wave tracer 6 can be realized according to the prior art.
A kind of low current fault wire selection system based on piezoelectric ceramics voltage acquisition that the utility model embodiment provides exists
When in-site installation, the zero sequence current mutual inductor 2 can be first installed in the end lower part of the three-core cable 10 so that described
A phases busbar 11, B phases busbar 12, C phases busbar 13 pass through the zero sequence current mutual inductor 2, and ground wire 14 is also passed through zero sequence
Current transformer 2.Then, the zero sequence current mutual inductor 2 is connect with the wave tracer 6.Later, described first is pressed
Electroceramics formula voltage transformer 41, the second piezoelectric ceramic type voltage transformer 42 and the third piezoelectric ceramic type voltage
Mutual inductor 43, which divides, is installed on first aerial condutor 31, second aerial condutor 32 and the third aerial condutor 33
On, for acquiring circuit phase-to-ground voltage, and by coaxial cable 7 by the first piezoelectric ceramic type voltage transformer 41, institute
It states the second piezoelectric ceramic type voltage transformer 42 and the third piezoelectric ceramic type voltage transformer 43 is connected to waveform recording
The wave tracer 6 and processor 9 are finally attached by instrument 6 by data line.
By above technical scheme it is found that the utility model embodiment provide it is a kind of based on the small of piezoelectric ceramics voltage acquisition
Current failure wire selection system, including：Electric power cable 1, zero sequence current mutual inductor 2, aerial condutor 3, piezoelectric ceramic type mutual induction of voltage
Device 4, wave tracer 6, low current fault line selection apparatus 8 and processor 9.Electric power cable 1 includes A phases busbar 11, B phase busbares
12 and C phases busbar 13；Aerial condutor 3 includes the first aerial condutor 31 being connect with A phases busbar 11, is connect with B phases busbar 12
The second aerial condutor 32, and the third aerial condutor 33 that is connect with C phases busbar 13；Piezoelectric ceramic type voltage transformer 4 wraps
Include the first piezoelectric ceramic type voltage transformer 41, the second piezoelectric ceramic type voltage transformer 42 and third piezoelectric ceramic type voltage
Mutual inductor 43.A phases busbar 11, B phases busbar 12, C phases busbar 13 constitute three-core cable 10, and zero sequence current mutual inductor 2 is sheathed on three
The periphery of core cable 10, zero sequence current mutual inductor 2 are connect with wave tracer 6；First piezoelectric ceramic type voltage transformer 41
Top is connect with the first aerial condutor 31, bottom extraction voltage tap；The top of second piezoelectric ceramic type voltage transformer 42 with
Second aerial condutor 32 connects, bottom extraction voltage tap；The top of third piezoelectric ceramic type voltage transformer 43 and third frame
Hollow wire 33 connects, bottom extraction voltage tap；First piezoelectric ceramic type voltage transformer 41, the second piezoelectric ceramic type voltage are mutual
The voltage tap of sensor 42 and third piezoelectric ceramic type voltage transformer 43 is connect with wave tracer 6 respectively；This practicality is new
A kind of low current fault wire selection system based on piezoelectric ceramics voltage acquisition that type embodiment provides, passes through piezoelectric ceramic type voltage
Mutual inductor 4 acquires circuit phase-to-ground voltage, and circuit zero-sequence current when zero sequence current mutual inductor 2 acquires line fault works as line zero
When the transition of sequence electric current or circuit phase-to-ground voltage is more than the trigger value of wave tracer 6, electricity can be recorded by wave tracer 6
Pressure, current waveform, and are transmitted to processor 9 by the electric current of record, voltage waveform data, convenient for processor 9 according to above-mentioned electric current,
Voltage waveform carrys out failure judgement type, and then by faulty line signal transmission to low current fault line selection apparatus 8, the utility model
The low current fault wire selection system based on piezoelectric ceramics voltage acquisition provided can provide packet for the accurate analysis of faulty line
The sufficient data support including circuit zero-sequence current, circuit phase-to-ground voltage is included, as the auxiliary of line selection device for low current route selection
Assistant's section, by combining the multi-party face data of distribution line to lead to the mutual supplement with each other's advantages of a variety of criterions to reduce single criterion
Erroneous judgement.
Above the utility model embodiment does not constitute the restriction to scope of protection of the utility model.
Claims (5)
1. a kind of low current fault wire selection system based on piezoelectric ceramics voltage acquisition, which is characterized in that including：
Electric power cable (1), zero sequence current mutual inductor (2), aerial condutor (3), piezoelectric ceramic type voltage transformer (4), waveform note
Record instrument (6), low current fault line selection apparatus (8) and processor (9)；
The electric power cable (1) includes A phases busbar (11), B phases busbar (12) and C phases busbar (13)；The aerial condutor (3)
Include the first aerial condutor (31) being connect with the A phases busbar (11), second connect with the B phases busbar (12) is aerial leads
Line (32), and the third aerial condutor (33) that is connect with the C phases busbar (13)；The piezoelectric ceramic type voltage transformer
(4) include the first piezoelectric ceramic type voltage transformer (41), the second piezoelectric ceramic type voltage transformer (42) and third piezoelectricity
Ceramic-type voltage transformer (43)；
The A phases busbar (11), B phases busbar (12), C phases busbar (13) constitute three-core cable (10), the zero sequence current mutual inductance
Device (2) is sheathed on the periphery of the three-core cable (10), and the zero sequence current mutual inductor (2) connects with the wave tracer (6)
It connects；
The top of the first piezoelectric ceramic type voltage transformer (41) is connect with first aerial condutor (31), and bottom is drawn
Voltage tap；The top of the second piezoelectric ceramic type voltage transformer (42) is connect with second aerial condutor (32), bottom
Portion's extraction voltage tap；The top of the third piezoelectric ceramic type voltage transformer (43) connects with the third aerial condutor (33)
It connects, bottom extraction voltage tap；The first piezoelectric ceramic type voltage transformer (41), the second piezoelectric ceramic type voltage are mutual
Sensor (42) and the voltage tap of the third piezoelectric ceramic type voltage transformer (43) respectively with the wave tracer (6)
Connection；
The wave tracer (6) connect with the processor (9), and the processor (9) fills with the low current fault route selection
Set (8) connection.
2. the low current fault wire selection system based on piezoelectric ceramics voltage acquisition as described in claim 1, which is characterized in that institute
It further includes ground wire (14) to state electric power cable (1), and the ground wire (14) is located at the side of the three-core cable (10), described to connect
Ground wire (14) passes through the zero sequence current mutual inductor (2).
3. the low current fault wire selection system based on piezoelectric ceramics voltage acquisition as described in claim 1, which is characterized in that institute
Zero sequence current mutual inductor (2) is stated to connect with the wave tracer (6) by insulated conductor (5).
4. the low current fault wire selection system based on piezoelectric ceramics voltage acquisition as claimed in claim 3, which is characterized in that institute
The voltage class for stating insulated conductor (5) is 0.6~1KV.
5. the low current fault wire selection system based on piezoelectric ceramics voltage acquisition as described in claim 1, which is characterized in that institute
State the second piezoelectric ceramic type voltage transformer (42) and the voltage tap of the third piezoelectric ceramic type voltage transformer (43)
It is connect respectively with the wave tracer (6) by coaxial cable (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820322113.7U CN207851213U (en) | 2018-03-08 | 2018-03-08 | Low current fault wire selection system based on piezoelectric ceramics voltage acquisition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820322113.7U CN207851213U (en) | 2018-03-08 | 2018-03-08 | Low current fault wire selection system based on piezoelectric ceramics voltage acquisition |
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| Publication Number | Publication Date |
|---|---|
| CN207851213U true CN207851213U (en) | 2018-09-11 |
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ID=63409229
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| CN201820322113.7U Active CN207851213U (en) | 2018-03-08 | 2018-03-08 | Low current fault wire selection system based on piezoelectric ceramics voltage acquisition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196167A (en) * | 2018-03-08 | 2018-06-22 | 云南电网有限责任公司电力科学研究院 | Low current fault wire selection system based on piezoelectric ceramics voltage acquisition |
-
2018
- 2018-03-08 CN CN201820322113.7U patent/CN207851213U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196167A (en) * | 2018-03-08 | 2018-06-22 | 云南电网有限责任公司电力科学研究院 | Low current fault wire selection system based on piezoelectric ceramics voltage acquisition |
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