CN206892261U - A kind of alternating-current voltage resistance test device for overhead transmission line - Google Patents
A kind of alternating-current voltage resistance test device for overhead transmission line Download PDFInfo
- Publication number
- CN206892261U CN206892261U CN201720903189.4U CN201720903189U CN206892261U CN 206892261 U CN206892261 U CN 206892261U CN 201720903189 U CN201720903189 U CN 201720903189U CN 206892261 U CN206892261 U CN 206892261U
- Authority
- CN
- China
- Prior art keywords
- alternating
- transmission line
- overhead transmission
- variable
- power sources
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model discloses a kind of alternating-current voltage resistance test device for overhead transmission line, including：Variable-frequency power sources, exciting transformer, resonance reactor, A.C. contactor and test interface；The input of variable-frequency power sources is electrically connected with exchanging for outside, and the output end of variable-frequency power sources is connected with the primary coil of exciting transformer；One end of resonance reactor is connected by A.C. contactor with one end of the secondary coil of exciting transformer, and the other end of resonance reactor is connected with test interface；The other end ground connection of the secondary coil of exciting transformer；Test interface is used to be connected with one end of the cable under test of overhead transmission line, and the other end ground connection of cable under test.The device need not release overhead transmission line when carrying out ac voltage withstanding experiment, ac voltage withstanding experiment is carried out together with overhead transmission line to cable by series resonant method, the insulation defect of whole piece circuit can be preferably found, and reduce the labor intensity and work risk of maintainer.
Description
Technical field
Pressure test technical field is the utility model is related to, more particularly to a kind of ac voltage withstanding for overhead transmission line is tested
Device.
Background technology
Existing 35kV isolated neutral systems have installed arc suppression coil, and have arc suppression coil to automatically control input regulation
System, but the overvoltage such as thunder and lightning, operation still causes very big harm to 35kV systems, triggers a lot of ground connection, so as to cause
Cable breakdown failure.
After substation equipment maintenance and repair is to failure cable repair process, when carrying out high-potting, due to conventional methods, experiment
Instrument capacity can not meet condition, therefore need to release overhead transmission line, this not only adds the working strength of substation equipment maintenance and repair personnel,
Also the danger of work is materially increased, and can not further investigate the insulation hidden danger of whole piece circuit.
The information for being disclosed in the background section is merely intended to increase the understanding to general background of the present utility model, and
It is not construed as recognizing or implies that the information structure has been existing well known to persons skilled in the art in any form
Technology.
Utility model content
The purpose of this utility model is to provide a kind of alternating-current voltage resistance test device for overhead transmission line, existing so as to overcome
Have and the big technical problem of ac voltage withstanding experiment work amount is carried out to overhead transmission line.
To achieve the above object, the utility model provides a kind of alternating-current voltage resistance test device for overhead transmission line, bag
Include：Variable-frequency power sources, exciting transformer, resonance reactor, A.C. contactor and test interface；The input of the variable-frequency power sources with
Outside exchange is electrically connected, and the output end of the variable-frequency power sources is connected with the primary coil of the exciting transformer；The resonance
One end of reactor is connected by the A.C. contactor with one end of the secondary coil of the exciting transformer, the resonance electricity
The other end of anti-device is connected with the test interface；The other end ground connection of the secondary coil of the exciting transformer；The test
Interface is used to be connected with one end of the cable under test of overhead transmission line, and the other end ground connection of the cable under test.
In a kind of possible implementation, the alternating-current voltage resistance test device also includes：High-voltage bleeder；The high pressure point
One end of depressor is connected with the test interface, other end ground connection.
In a kind of possible implementation, the high-voltage bleeder is purely capacitive formula divider.
In a kind of possible implementation, the alternating-current voltage resistance test device also includes：High pressure compensation electric capacity；The high pressure
One end of compensating electric capacity is connected with the test interface, other end ground connection.
In a kind of possible implementation, the input of the variable-frequency power sources is used for the alternating current for receiving 50Hz, and institute
The voltage for stating alternating current is 220V or 380V.
Compared with prior art, the utility model has the advantages that：
A kind of alternating-current voltage resistance test device for overhead transmission line that the utility model embodiment provides, it is resistance to exchange
Overhead transmission line need not be released during pressure experiment, ac voltage withstanding experiment is carried out together with overhead transmission line to cable by series resonant method,
The insulation defect of whole piece circuit can be preferably found, and reduce the labor intensity and work risk of maintainer；Simultaneously
Equipment is simple, it is not necessary to directly provides high pressure, test is simple.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages can pass through
Specifically noted structure is realized and obtained in the specification, claims and accompanying drawing write.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Accompanying drawing is used for providing further understanding to of the present utility model, and a part for constitution instruction, with this practicality
New embodiment is used to explain the utility model together, does not form to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is the first circuit structure diagram of alternating-current voltage resistance test device in the utility model embodiment；
Fig. 2 is the second circuit structure chart of alternating-current voltage resistance test device in the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in detail, it is to be understood that this practicality
New protection domain is not limited by embodiment.
Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term " comprising " or its change
Change such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not exclude other members
Part or other parts.
A kind of alternating-current voltage resistance test device for overhead transmission line disclosed in the utility model embodiment, it is shown in Figure 1,
Including：Variable-frequency power sources, exciting transformer T, resonance reactor L, A.C. contactor K and test interface A.
Wherein, the input of variable-frequency power sources is electrically connected with exchanging for outside, output end and the exciting transformer T of variable-frequency power sources
Primary coil be connected.In the utility model embodiment, variable-frequency power sources is used to realize 50Hz power frequencies → direct current → frequency-changing AC
The conversion of electricity, the adjustable alternating current of output frequency.Specifically, the input power of variable-frequency power sources can be civil power or commercial power,
Frequency is 50Hz, it is allowed to which error is ± 5%；Magnitude of voltage is 220V/380V, it is allowed to which error is ± 10%；Output voltage values are adjustable,
0~200V/400V is generally exchanged, the scope of output frequency is 20~400Hz.
As shown in figure 1, resonance reactor L one end pass through A.C. contactor K and exciting transformer T secondary coil one
End is connected, and the resonance reactor L other end is connected with test interface A；The other end ground connection of exciting transformer T secondary coil.
In the utility model embodiment, the inductance to be measured of resonance reactor L and capacitive is composed in series resonant tank, resonance electricity
Anti- device L is the adjustable inductance of induction reactance, reaches resonant condition by the induction reactance loop for adjusting resonance reactor L.Excitation transformation
Device is used to be isolated variable-frequency power sources with transformation test loop, to protect variable-frequency power sources；Play a part of transformation matching simultaneously,
The power and voltage at utmost accomplishing variable-frequency power sources and cable under test match.A.C. contactor K is used to control resonant tank
Break-make, can occur it is unexpected when quickly disconnect resonant tank.
Test interface A is used to be connected with the cable under test X of overhead transmission line one end, and cable under test X other end ground connection.
In the utility model embodiment, quickly it can be connected by test interface A with cable under test, so as to improve testing efficiency.
The operation principle for the alternating-current voltage resistance test device that the utility model embodiment provides is specific as follows：For series resonance
Circuit, when the sinusoidal frequency of resonance circuit external input voltage reaches a certain specific frequency (i.e. the resonant frequency of the circuit),
The induction reactance of resonance circuit is equal with capacitive reactance, i.e.,：So resonance angular frequencyAgain due to the π f of ω=20, therefore
Resonant frequencyWherein, L represents the inductance value of resonance reactor, and C represents the capacitance of capacitive cable under test.
Meanwhile when resonant tank produces series resonance, Us=QU0,Wherein, the quality factor of resonant tank areR is the resistance value of resonant tank, and the resistance is specifically by the exciting transformer in loop, electricity to be measured
The internal resistance composition of cable；UsRepresent the voltage of cable under test both sides, U0Represent the output voltage of exciting transformer secondary coil, PsTable
Show the power of cable under test, P0Represent the power of exciting transformer secondary coil output.
Because the frequency of resonance circuit can change in the range of 20~400Hz, resonant frequency excursion is larger, quality because
Number Q excursion is larger, typically between tens to hundreds of.It can be seen from above-mentioned analysis, due to Us=QU0、I.e.
Pass through a less magnitude of voltage U0Can be to provide higher voltage U for cable under tests.For example the cable of overhead transmission line is entered
When row 52KV ac voltage withstandings are tested, if Q is 100, exciting transformer exports 520V voltage.
A kind of alternating-current voltage resistance test device for overhead transmission line that the utility model embodiment provides, it is resistance to exchange
Overhead transmission line need not be released during pressure experiment, ac voltage withstanding experiment is carried out together with overhead transmission line to cable by series resonant method,
The insulation defect of whole piece circuit can be preferably found, and reduce the labor intensity and work risk of maintainer；Simultaneously
Equipment is simple, it is not necessary to directly provides high pressure, test is simple.
Shown in Figure 2 on the basis of above-described embodiment, the device also includes：High-voltage bleeder S；High-voltage bleeder S
One end be connected with test interface A, the other end ground connection.High-voltage bleeder is used for the test voltage for measuring cable under test X, using string
Purely capacitive formula divider can be typically used when joining resonance, the voltage detected by direct coupled type or the output of Fiber isolation formula.
Shown in Figure 2 on the basis of above-described embodiment, the device also includes：High pressure compensation electric capacity C1；High pressure compensation
Electric capacity C1 one end is connected with test interface A, other end ground connection.The high pressure compensation electric capacity main function is compensation short distance, small
The power cables capacitance amount of equivalent electric capacity (below thousands of pico farads), by being connected in parallel to the intrinsic humorous of in resonant tank so that loop
Vibration frequency is in the frequency range that variable-frequency power sources or regulation require.
The foregoing description to specific illustrative embodiment of the present utility model is to illustrate and the purpose of illustration.These
Description is not wishing to for the utility model to be defined to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explain certain principles of the present utility model
And its practical application, so that those skilled in the art can realize and utilize a variety of examples of the present utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shape
Formula is limited.
Claims (5)
- A kind of 1. alternating-current voltage resistance test device for overhead transmission line, it is characterised in that including：Variable-frequency power sources, exciting transformer, Resonance reactor, A.C. contactor and test interface；The input of the variable-frequency power sources is electrically connected with exchanging for outside, the output end of the variable-frequency power sources and the excitation transformation The primary coil of device is connected；One end phase that one end of the resonance reactor passes through the A.C. contactor and the secondary coil of the exciting transformer Even, the other end of the resonance reactor is connected with the test interface；The other end of the secondary coil of the exciting transformer Ground connection；The test interface is used to be connected with one end of the cable under test of overhead transmission line, and another termination of the cable under test Ground.
- 2. alternating-current voltage resistance test device according to claim 1, it is characterised in that also include：High-voltage bleeder；The height One end of pressure divider is connected with the test interface, other end ground connection.
- 3. alternating-current voltage resistance test device according to claim 2, it is characterised in that the high-voltage bleeder is purely capacitive formula Divider.
- 4. alternating-current voltage resistance test device according to claim 1, it is characterised in that also include：High pressure compensation electric capacity；One end of the high pressure compensation electric capacity is connected with the test interface, other end ground connection.
- 5. alternating-current voltage resistance test device according to claim 1, it is characterised in that the input of the variable-frequency power sources is used for 50Hz alternating current is received, and the voltage of the alternating current is 220V or 380V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720903189.4U CN206892261U (en) | 2017-07-24 | 2017-07-24 | A kind of alternating-current voltage resistance test device for overhead transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720903189.4U CN206892261U (en) | 2017-07-24 | 2017-07-24 | A kind of alternating-current voltage resistance test device for overhead transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206892261U true CN206892261U (en) | 2018-01-16 |
Family
ID=61297420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720903189.4U Expired - Fee Related CN206892261U (en) | 2017-07-24 | 2017-07-24 | A kind of alternating-current voltage resistance test device for overhead transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206892261U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389271A (en) * | 2019-08-14 | 2019-10-29 | 青岛云路特变智能科技有限公司 | Testing System of Transformer and method |
| CN112540276A (en) * | 2020-12-07 | 2021-03-23 | 广东电网有限责任公司 | Vehicle-mounted cable voltage withstand test device and test system |
-
2017
- 2017-07-24 CN CN201720903189.4U patent/CN206892261U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389271A (en) * | 2019-08-14 | 2019-10-29 | 青岛云路特变智能科技有限公司 | Testing System of Transformer and method |
| CN112540276A (en) * | 2020-12-07 | 2021-03-23 | 广东电网有限责任公司 | Vehicle-mounted cable voltage withstand test device and test system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103078316B (en) | Network voltage disturbance generating device and control method thereof | |
| CN104181490B (en) | A kind of big current temporary state characteristic detection device of electronic current mutual inductor | |
| CN104035013A (en) | 500 KV electromagnetic voltage transformer alternating-current frequency-doubling withstand voltage test circuit and method | |
| CN105259489B (en) | Extra-high voltage neutral reactor scene induced over voltage withstand test system and method | |
| CN205608139U (en) | Change of current becomes partial discharge test device | |
| CN101833043A (en) | Method for measuring electric capacity and dielectric loss of capacitance type voltage transformer | |
| CN206038836U (en) | Series resonance high -voltage insulation test device | |
| CN103558573A (en) | Performance testing method for voltage transformer | |
| CN102680861A (en) | System and method for testing short circuit withstanding capability of transformer or electric reactor | |
| CN102338844B (en) | Method for performing on-site partial discharge test on ultrahigh voltage converter transformer | |
| CN206892261U (en) | A kind of alternating-current voltage resistance test device for overhead transmission line | |
| CN102288880A (en) | Frequency-changing resonant withstand voltage testing device | |
| CN110620433A (en) | Long-term voltage test system for changing alternating current cable into direct current operation | |
| CN202057764U (en) | Variable frequency resonance voltage withstand test device | |
| CN109946571A (en) | The method for carrying out voltage transformer induced over voltage withstand test using relay-protection tester | |
| CN207067321U (en) | High altitude localities 750kV shunt reactor Partial Discharge Testing on Site devices | |
| CN106856373A (en) | A kind of harmonic wave generation device | |
| CN206945842U (en) | A kind of distribution reactive power compensator analogue test platform | |
| CN107861012A (en) | A kind of through-flow device of high-power transformer | |
| CN107436399A (en) | High altitude localities 750kV shunt reactor local discharge test devices | |
| CN106959405A (en) | The electrical quantity of extra-high voltage GIS major loop Insulation Test and test capability computational methods | |
| CN201282339Y (en) | Series hybrid active electric filter device | |
| CN103076514A (en) | Sound level measuring test method for dry-type smoothing reactor | |
| CN103499779A (en) | UHV (Ultra High Voltage) transformer field variable frequency partial discharge test device | |
| CN103605101A (en) | Power-frequency subsection voltage stepping-up tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180116 |