CN106569065A - DC cable thermal cycle voltage test device - Google Patents
DC cable thermal cycle voltage test device Download PDFInfo
- Publication number
- CN106569065A CN106569065A CN201610953003.6A CN201610953003A CN106569065A CN 106569065 A CN106569065 A CN 106569065A CN 201610953003 A CN201610953003 A CN 201610953003A CN 106569065 A CN106569065 A CN 106569065A
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- CN
- China
- Prior art keywords
- thermal cycle
- cable
- direct current
- test device
- cycle voltage
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
Disclosed is a DC cable thermal cycle voltage test device. The invention relates to a DC cable thermal cycle voltage test device. According to the existing DC cable thermal cycle voltage test device, a cross-under cable heating transformer and an AC heating mode are employed, the electric field distribution is changed when the temperature of a cable is changed, so that test cannot truly reflect the operation condition of the cable. Therefore, the existing DC cable thermal cycle voltage test device is defective. The DC cable thermal cycle voltage test device of the invention comprises a step-up transformer, and a rectifier bridge electrically connected with the step-up transformer. The rectifier bridge has a first output end and a second output end. A DC cable for test is connected between the first output end and the second output end. The high-potential end of the DC cable for test is connected to a DC high-voltage generator. According to the technical scheme, thermal cycle voltage test is carried out under direct current instead of traditional induced alternating current, the actual operation condition of a DC cable can be truly simulated, and test is closer to the actual working condition.
Description
Technical field
The present invention relates to a kind of direct current cables thermal cycle voltage test device.
Background technology
Existing direct current cables thermal cycle voltage test device adopts cross under type cable heating transformer, with the exchange of sensing
Electric current carries out heat run, and it is DC current that direct current cables passes through in actual motion, and exchange mode of heating can make outside
Metal sheath produces circulation loss, and then changes cable inside to outside Temperature Distribution, and Electric Field Distribution and the temperature of cable have
Direct relation, changes Electric Field Distribution so that test can not using exchange mode of heating while cable temperature distribution is changed
Real reflection cable operation conditions, existing defects.
The content of the invention
The technical problem to be solved in the present invention and the technical assignment for proposing are prior art to be improved and is improved,
A kind of direct current cables thermal cycle voltage test device is provided, for the purpose of the actual operating state of more preferable analog DC cable.
For this purpose, the present invention takes technical scheme below.
A kind of direct current cables thermal cycle voltage test device, including step-up transformer electrically connect with step-up transformer it is whole
Stream bridge, described rectifier bridge is provided with the first output end and the second output end, connection examination between the first output end and the second output end
Test and use direct current cables, the hot end of test direct current cables is connected to high voltage direct current generator.By step-up transformer, rectification
Bridge and high voltage direct current generator realize the DC heating and voltage test of the direct current cables to test, simulation effect and direct current
The working condition of cable is almost identical, more meets the practical application situation of direct current cables.
As further improving and supplementing to above-mentioned technical proposal, present invention additionally comprises following additional technical feature.
Described rectifier bridge is supported by its lower set supports insulative post.Supports insulative post provides support to rectifier bridge,
And there is no electrical connection phenomenon due to its insulation characterisitic, improve the functional reliability of rectifier bridge.
Described rectifier bridge is PWM rectifier bridges.PWM controls are simple, flexible, and dynamic response is good, and through-current capability is strong.
Described supports insulative post ground connection.Can with effective process supports insulative post produce charge inducing and electrostatic charge,
Lift the security of rectifier bridge.
Described step-up transformer is output voltage adjustable variable-pressure device.By the regulation to output pressure, there is provided required
Output pressure.
Beneficial effect：By replacing traditional induced AC current to carry out thermal cycle voltage test, energy using DC current
The actual operating state of enough real analog DC cables, makes test closer to real work situation.
Description of the drawings
Fig. 1 is electrical block diagram of the present invention.
1- step-up transformers in figure；2- supports insulative posts；3- test direct current cables；The output ends of 4- first；5- second is defeated
Go out end；6- high voltage direct current generators；7- rectifier bridges.
Specific embodiment
Technical scheme is described in further detail below in conjunction with Figure of description.
As shown in figure 1, a kind of direct current cables thermal cycle voltage test device, including step-up transformer 1 and step-up transformer
The rectifier bridge 7 of 1 electrical connection, described rectifier bridge 7 is provided with the first output end 4 and the second output end 5, the first output end 4 and second
Joint test direct current cables 3 between output end 5, the hot end of test direct current cables 3 is connected to high voltage direct current generator
6.The DC heating of the direct current cables 3 to test is realized by step-up transformer 1, rectifier bridge 7 and high voltage direct current generator 6,
Simulated test operating mode is consistent with the working condition of direct current cables 3, more meets the practical application situation of direct current cables 3.
In order to provide support to rectifier bridge 7, rectifier bridge 7 is supported by its lower set supports insulative post 2.Supports insulative post
2 provide support to rectifier bridge 7, and electric conduction phenomena does not occur due to its insulation characterisitic, improve the reliable operation of rectifier bridge 7
Property.
For the ease of control, rectifier bridge 7 is PWM rectifier bridges 7.PWM controls are simple, flexible, and dynamic response is good, through-current capability
By force.
In order to lift security, supports insulative post 2 is grounded.Can be with the induced electricity of generation on effective process supports insulative post 2
Lotus and electrostatic charge, lift the security of rectifier bridge 7.
For the ease of adjusting output voltage, step-up transformer 1 is output voltage adjustable variable-pressure device.By to output pressure
Adjust, there is provided required output pressure.
During test, step-up transformer 1 is poor in the certain voltage of transformer boost side draw hot end, and output after rectification is arrived
PWM rectifier bridges 7, joint test direct current cables 3 between first output end 4 and the second output end 5 of PWM rectifier bridges 7, test is used
The hot end of direct current cables 3 is connected to high voltage direct current generator 6, and high voltage direct current generator 6 can be adjusted according to needed for test
Electric current, voltage.
In this example, the cold end ground connection of the step-up side of step-up transformer 1, high voltage direct current generator 6 is grounded.
A kind of direct current cables thermal cycle voltage test device shown in figure 1 above is the specific embodiment of the present invention,
Substantive distinguishing features of the present invention and progress are embodied, under the enlightenment of the present invention, shape can be carried out to it according to actual use needs
The equivalent modifications of the aspects such as shape, structure, this programme protection domain row.
Claims (5)
1. a kind of direct current cables thermal cycle voltage test device, it is characterised in that：Including step-up transformer（1）With boosting transformation
Device（1）The rectifier bridge of electrical connection（7）, described rectifier bridge（7）It is provided with the first output end（4）With the second output end（5）, first is defeated
Go out end（4）With the second output end（5）Between joint test direct current cables（3）, test direct current cables（3）Hot end connect
It is connected to high voltage direct current generator（6）.
2. a kind of direct current cables thermal cycle voltage test device according to claim 1, it is characterised in that：Described rectification
Bridge（7）By its lower set supports insulative post（2）Support.
3. a kind of direct current cables thermal cycle voltage test device according to claim 1, it is characterised in that：Described rectification
Bridge（7）For PWM rectifier bridges（7）.
4. a kind of direct current cables thermal cycle voltage test device according to claim 1, it is characterised in that：Described support
Insulated column（2）Ground connection.
5. a kind of direct current cables thermal cycle voltage test device according to claim 1, it is characterised in that：Described boosting
Transformer（1）For output voltage adjustable variable-pressure device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953003.6A CN106569065B (en) | 2016-11-03 | 2016-11-03 | Direct current cable thermal cycle voltage test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953003.6A CN106569065B (en) | 2016-11-03 | 2016-11-03 | Direct current cable thermal cycle voltage test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106569065A true CN106569065A (en) | 2017-04-19 |
| CN106569065B CN106569065B (en) | 2023-09-05 |
Family
ID=58535298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610953003.6A Active CN106569065B (en) | 2016-11-03 | 2016-11-03 | Direct current cable thermal cycle voltage test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106569065B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521306A (en) * | 2018-12-29 | 2019-03-26 | 广东电网有限责任公司 | A kind of thermal cycling ageing temprature control method, device, equipment and storage medium |
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| US20080084200A1 (en) * | 2006-10-06 | 2008-04-10 | Honeywell International Inc. | Method and apparatus for DC integrated current sensor |
| CN201514446U (en) * | 2009-09-29 | 2010-06-23 | 中国西电电气股份有限公司 | High-voltage AC/DC test device for environmental monitoring |
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| CN109521306A (en) * | 2018-12-29 | 2019-03-26 | 广东电网有限责任公司 | A kind of thermal cycling ageing temprature control method, device, equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106569065B (en) | 2023-09-05 |
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