CN207832951U - A kind of capacitance type potential transformer insulation line monitoring device - Google Patents
A kind of capacitance type potential transformer insulation line monitoring device Download PDFInfo
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- CN207832951U CN207832951U CN201820315588.3U CN201820315588U CN207832951U CN 207832951 U CN207832951 U CN 207832951U CN 201820315588 U CN201820315588 U CN 201820315588U CN 207832951 U CN207832951 U CN 207832951U
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- mutual inductor
- capacitance type
- potential transformer
- type potential
- tail end
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Abstract
The utility model provides a kind of capacitance type potential transformer insulation line monitoring device, including：Resistance, high-voltage conducting wires, capacitance type potential transformer, band shielding p-wire, voltage waveform test instrument, test insulated conductor and background monitoring instrument；Capacitance type potential transformer includes the mutual inductor ontology being connected in series with and mutual inductor tail end, it is in parallel with mutual inductor tail end while resistance is connected with mutual inductor ontology, band shielding p-wire connection mutual inductor tail end and voltage waveform test instrument, the voltage detected is transferred to background monitoring instrument by the end da, dn of test insulated conductor connection mutual inductor and voltage waveform test instrument, voltage waveform test instrument.It is connected voltage divider principle and parallel shunt principle according to circuit, on-Line Monitor Device provided by the utility model is capable of the state of insulation of real time on-line monitoring capacitance type potential transformer ontology and tail end.
Description
Technical field
This application involves high-tension electricity equipment technical field more particularly to a kind of online prisons of capacitance type potential transformer insulation
Survey device.
Background technology
Capacitance type potential transformer is to be divided by series capacitor, then be depressured and be isolated through electromagnetic transformer, as table
A kind of voltage transformer of meter, relay protection etc..Be widely used in 110kV and the above electric system, be protecting electrical power system,
It measures, metering provides accurate voltage signal.Small since its impact strength is small, light-weight, energy can again in practical applications
By damping ferromagnetic resonance and have the advantages of excellent transient response characteristic, just gradually replace electromagnetic potential transformer, is electricity
A kind of essential equipment in net.
Capacitance type potential transformer is mainly made of capacitive divider and middle pressure transformer.Capacitive divider is by insulator and dress
Several series capacitors composition wherein, insulator is interior full of the insulating oil for keeping 0.1MPa positive pressures, is used in combination steel corrugated pipe flat
Weighing apparatus varying environment is to keep oil pressure, capacitive divider to can be used as coupling capacitor connection carrier equipment.Middle pressure transformer is by being mounted in
Transformer, compensation reactor, arrester in leakproof fuel cell and damping unit composition, the space nitrogen charging of top of oil-tank.Once around
Component is main winding and fine tuning winding, a low-loss reactor of connecting between primary side and first winding.
It is required in preventive trial regulation：Capacitance type potential transformer carries out electrode insulation resistance, a capacitance in every 3 years
And tan δ tests.Capacitance type potential transformer has found that a lot of tail end immersions are made moist in primary prerun experiment in every 3 years, insulate
The situation of degradation；Also occur in operation inside a lot of mutual inductors because making moist, the reasons such as aging cause capacitance to puncture, in turn
Lead to the equipment deficiencies such as dielectric loss raising, secondary voltage exception, can explode when serious, cause serious consequence.Therefore, it needs
Capacitance type potential transformer is monitored, the operating status of capacitance type potential transformer can be grasped by monitoring, in time
It was found that capacitance type potential transformer failure, debugs early, to which fault harm to be preferably minimized.
Utility model content
The purpose of this utility model is to provide a kind of capacitance type potential transformer insulation line monitoring device, existing to solve
Electricity power engineering in not to capacitance type potential transformer insulate carry out on-Line Monitor Device the problem of.
The utility model provides a kind of capacitance type potential transformer insulation line monitoring device, including：Resistance, high pressure are led
Line, capacitance type potential transformer, band shielding p-wire, voltage waveform test instrument, test insulated conductor and background monitoring instrument；
The capacitance type potential transformer includes ontology and tail end, and described ontology one end is high-pressure side, and the ontology is another
End is low-pressure end, and the tail end is connected with the low-pressure end, and the high-voltage conducting wires are connect with the high-pressure side, the resistance and institute
It states and is connected in series with the ontology while tail end is connected in parallel；
Band shielding p-wire one end is connect with the tail end, the band shielding p-wire other end and the voltage wave
Shape tester connects, the shielding layer grounding of the band shielding p-wire, one end of the test insulated conductor and the condenser type
The end da, dn of voltage transformer connects, and the other end of the test insulated conductor is connect with the voltage waveform test instrument；It is described
Voltage waveform test instrument is electrically connected with the background monitoring instrument.
Preferably, the resistance value of the resistance is 8 Ω.
Preferably, described resistance one end is connected with mutual inductor ontology, other end ground connection.
By above technical scheme it is found that the utility model provides a kind of capacitance type potential transformer insulated on-line monitoring dress
It sets, including：Resistance, high-voltage conducting wires, capacitance type potential transformer, band shielding p-wire, voltage waveform test instrument, test insulation are led
Line and background monitoring instrument；The capacitance type potential transformer includes ontology and tail end, and described ontology one end is high-pressure side, described
The body other end is low-pressure end, and the tail end is connected with the low-pressure end, and the high-voltage conducting wires are connect with the high-pressure side, the electricity
Resistance is connected in series with while being connected in parallel with the tail end with the ontology；Described band shielding p-wire one end connects with the tail end
It connects, the band shielding p-wire other end is connect with the voltage waveform test instrument, and the shielded layer of the band shielding p-wire connects
The one end on ground, the test insulated conductor is connect with the end da, dn of the capacitance type potential transformer, the test insulated conductor
The other end connect with the voltage waveform test instrument；The voltage waveform test instrument is electrically connected with the background monitoring instrument.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of capacitance type potential transformer insulation line monitoring device schematic diagram provided by the utility model；
Fig. 2 is capacitor voltage in a kind of capacitance type potential transformer insulation line monitoring device provided by the utility model
Mutual inductor schematic diagram.
It illustrates：1- resistance；2- high-voltage conducting wires；3- capacitance type potential transformers；31- mutual inductor ontologies；311- high pressures
End；312- low-pressure ends；32- mutual inductor tail ends；4- band shielding surveys line；5- voltage waveform test instrument；6- tests insulated conductor；After 7-
Platform monitor.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution in the utility model, below in conjunction with this reality
With the attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that
The described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Based on the utility model
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example should all belong to the range of the utility model protection.
It please refers to Fig.1 to Fig. 2, for a kind of capacitance type potential transformer on-Line Monitor Device implementation provided by the utility model
Example, including：Resistance 1, high-voltage conducting wires 2, capacitance type potential transformer 3, band shielding p-wire 4, voltage waveform test instrument 5, test
Insulated conductor 6 and background monitoring instrument 7；
The capacitance type potential transformer 3 includes mutual inductor ontology 31 and mutual inductor tail end 32, the mutual inductor ontology 31
One end is high-pressure side 311, and 31 other end of mutual inductor ontology is low-pressure end 312, the mutual inductor tail end 32 and the low pressure
312 series connection of end, the high-voltage conducting wires 2 are connect with the high-pressure side 311, and the resistance 1 is in parallel with the mutual inductor tail end 32 even
It is connected in series with the mutual inductor ontology 31 while connecing；
4 one end of the band shielding p-wire is connect with the tail end 32, band shielding 4 other end of p-wire and the electricity
Corrugating tester 5 connects, the shielding layer grounding of band shielding p-wire 4, one end of the test insulated conductor 6 with it is described
The end da, dn of capacitance type potential transformer 3 connects, the other end and the voltage waveform test instrument 5 of the test insulated conductor 6
Connection；The voltage waveform test instrument is electrically connected with the background monitoring instrument.
In the utility model embodiment, the high-pressure side 311 of mutual inductor ontology 31 is connect with high-voltage conducting wires 2, mutual inductor sheet
The low-pressure end 312 of body 31 is connected with mutual inductor tail end 32, while resistance 1 is in parallel with mutual inductor tail end 32 with low-pressure end 312
Series connection, and resistance 1 is grounded, such mutual inductor tail end 32 forms a capacitance again over the ground, while it is again in parallel with resistance 1.
Preferably, the resistance value of resistance 1 is set as 8 Ω, can both meet 32 voltage accuracy of acquisition mutual inductor tail end in this way
It is required that；The voltage's distribiuting inside mutual inductor will not be changed again, and then influence the requirement of secondary voltage test.The utility model is to institute
State the type of capacitance type potential transformer 3 and resistance 1 and model there is no limit.
In the utility model embodiment, core one end with shielding p-wire 4 is connect with mutual inductor tail end 32, the other end
It is connect with voltage waveform test instrument 5, shielding layer grounding；With test insulated conductor 6 by mutual inductor secondary side da, dn terminal respectively with
Voltage waveform test instrument 5 connects；Voltage waveform test instrument 5 is connect with background monitoring instrument 7 again.
During power Transmission, if mutual inductor ontology 31 makes moist or insulation breakdown, being connected according to circuit, it is former to divide
Reason, then the partial pressure on mutual inductor tail end 32 and resistance 1 increases, and the voltage of mutual inductor secondary side reduces；If mutual inductor tail end
32 make moist, and mutual inductor ontology 31 insulate well, and according to circuit in parallel shunting principle, then the voltage reduction at 1 both ends of resistance, works as mutual inductance
When 32 insulation damages of device tail end are serious, the voltage at 1 both ends of resistance falls to zero.Therefore, the electricity at 1 both ends of acquisition resistance can be passed through
Pressure is adjusted the mutual inductor prerun period to monitor the insulation status of mutual inductor ontology 31 and mutual inductor tail end 32.
The information of voltage at 1 both ends of mutual inductor secondary side and resistance is acquired and is transmitted to backstage and supervised by voltage waveform test instrument 5
Instrument 7 is controlled, background monitoring instrument 7 is by analyzing the voltage change of mutual inductor secondary side voltage and 1 both ends of resistance to mutual inductor ontology
31 and the insulation status of mutual inductor tail end 32 judged.
Those skilled in the art will readily occur to this practicality after considering specification and putting into practice utility model disclosed herein
Other novel embodiments.This application is intended to cover any variations, uses, or adaptations of the utility model, these
Variations, uses, or adaptations follow the general principle of the utility model and include undocumented skill of the utility model
Common knowledge in art field or conventional techniques.The description and examples are only to be considered as illustrative, the utility model
The limited claim of true scope and spirit is pointed out.
It should be understood that the utility model is not limited to the accurate knot for being described above and being shown in the accompanying drawings
Structure, and various modifications and changes may be made without departing from the scope thereof.The scope of the utility model is only wanted by appended right
It asks to limit.
Claims (3)
1. a kind of capacitance type potential transformer insulation line monitoring device, which is characterized in that including：Resistance (1), high-voltage conducting wires
(2), capacitance type potential transformer (3), band shielding p-wire (4), voltage waveform test instrument (5), test insulated conductor (6) and after
Platform monitor (7)；
The capacitance type potential transformer (3) includes mutual inductor ontology (31) and mutual inductor tail end (32), the mutual inductor ontology
(31) one end is high-pressure side (311), and mutual inductor ontology (31) other end is low-pressure end (312), the mutual inductor tail end
(32) connect with the low-pressure end (312), the high-voltage conducting wires (2) connect with the high-pressure side (311), the resistance (1) with
It is connected in series with the mutual inductor ontology (31) while the mutual inductor tail end (32) is connected in parallel；
Band shielding p-wire (4) one end is connect with the tail end (32), the band shield p-wire (4) other end with it is described
Voltage waveform test instrument (5) connects, the shielding layer grounding of the band shielding p-wire (4), and the one of the test insulated conductor (6)
End is connect with the end da, dn of the capacitance type potential transformer (3), the other end and the electricity of the test insulated conductor (6)
Corrugating tester (5) connects；The voltage waveform test instrument is electrically connected with the background monitoring instrument.
2. a kind of capacitance type potential transformer insulation line monitoring device as described in claim 1, it is characterised in that：The electricity
The resistance value for hindering (1) is 8 Ω.
3. a kind of capacitance type potential transformer insulation line monitoring device as described in claim 1, it is characterised in that：The electricity
Resistance (1) one end is connected with mutual inductor ontology (31), other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820315588.3U CN207832951U (en) | 2018-03-08 | 2018-03-08 | A kind of capacitance type potential transformer insulation line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820315588.3U CN207832951U (en) | 2018-03-08 | 2018-03-08 | A kind of capacitance type potential transformer insulation line monitoring device |
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| Publication Number | Publication Date |
|---|---|
| CN207832951U true CN207832951U (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820315588.3U Active CN207832951U (en) | 2018-03-08 | 2018-03-08 | A kind of capacitance type potential transformer insulation line monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320402A (en) * | 2019-06-17 | 2019-10-11 | 中国电力科学研究院有限公司 | Measure the device and method of the transient overvoltage of capacitance type potential transformer primary side |
-
2018
- 2018-03-08 CN CN201820315588.3U patent/CN207832951U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320402A (en) * | 2019-06-17 | 2019-10-11 | 中国电力科学研究院有限公司 | Measure the device and method of the transient overvoltage of capacitance type potential transformer primary side |
| CN110320402B (en) * | 2019-06-17 | 2023-10-03 | 中国电力科学研究院有限公司 | Device and method for measuring transient overvoltage of primary side of capacitive voltage transformer |
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