CN205941734U - A device for handing over DC cable adds thermal ageing test - Google Patents

A device for handing over DC cable adds thermal ageing test Download PDF

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Publication number
CN205941734U
CN205941734U CN201620838543.5U CN201620838543U CN205941734U CN 205941734 U CN205941734 U CN 205941734U CN 201620838543 U CN201620838543 U CN 201620838543U CN 205941734 U CN205941734 U CN 205941734U
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CN
China
Prior art keywords
cable
rectifier bridge
direct current
output
ageing test
Prior art date
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Active
Application number
CN201620838543.5U
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Chinese (zh)
Inventor
宋鹏先
孟峥峥
王浩鸣
周凤争
朱明正
李旭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
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Priority to CN201620838543.5U priority Critical patent/CN205941734U/en
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Publication of CN205941734U publication Critical patent/CN205941734U/en
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Abstract

The utility model relates to a device for handing over DC cable adds thermal ageing test, its major technical features is: including isolation transformer, rectifier bridge, filter capacitance, dc -to -ac converter and control the switch entirely, isolation transformer's former limit is connected with 380V alternating current power supply, and two inputs that the rectifier bridge is connected to the high voltage insulation wire are passed through on this isolation transformer's vice limit, the parallelly connected filter capacitance of output of this rectifier bridge with DC cable the wiring hold, the quilt is tried the DC cable both ends and connects to work a telephone switchboard at DC cable and serve, the dc -to -ac converter is connected on the output of rectifier bridge through controlling the switch entirely, and the output of dc -to -ac converter is connected and is exchanged the cable connection end, try to exchange the cable both ends and connects and serve at interchange cable connection. The utility model discloses can add thermal ageing test to exchanging cable and DC cable simultaneously for cable heating test is more accurate reliable, has characteristics such as precision height, simple structure, convenient operation, can extensively be used for exchanging cable and DC cable and add the thermal ageing test field.

Description

A kind of device for alternating current-direct current cable heat ageing test
Technical field
The utility model belongs to cable degradation technical field, and especially a kind of alternating current-direct current cable heat ageing that is used for tries The device tested.
Background technology
It would be desirable to be able to produce the high current device of kilo-ampere in existing high voltage ac/dc electric cable heating degradation.For Ac cable, typically adopts cross under type cable heating transformer.Tested cable needs the hole through transformer core, tested cable Secondary coil as transformer.After cross under type cable heating transformer is passed through electric current, due to galvanomagnetic-effect so that tested cable Itself produces heat, reaches the purpose of electric cable heating degradation.The shortcoming of this method be cannot be carried out accurately controlling by The electric current of examination cable.For direct current cables, market has various heat run devices, but general principle is all to utilize Transformer is changing electric current.At present, there is scholar to propose to utilize rectification principle, direct current cables has been born as the direct current of rectifier bridge Carry, precise control commutating voltage is to realize the control to tested cable current, thus it is aging to reach the tested electric cable heating of control Target.In sum, the experimental rig for ac cable and direct current cables heat ageing is not quite similar, in testing at the scene, Generally require to prepare multiple devices, bring inconvenience to practical operation.
Content of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of compact conformation, control accuracy high and Device for alternating current-direct current cable heat ageing test easy to use.
The utility model solves its technical problem and takes technical scheme below to realize:
A kind of device for alternating current-direct current cable heat ageing test, including isolating transformer, rectifier bridge, filter capacitor, Inverter and full control switch, the former limit of described isolating transformer is connected with 380V AC power, the secondary of this isolating transformer Connect two inputs, the output end parallel filtering electric capacity of this rectifier bridge and the direct current cables of rectifier bridge by high-voltage insulating wire Terminals, tested direct current cables two end is connected on direct current cables terminals;Described inverter is connected to rectification by full control switch In the output end of bridge, the output end of inverter connects ac cable terminals, and tested ac cable two end is connected on ac cable and connects On line end.
Described rectifier bridge and inverter are connected and composed by IGBT or IGCT.
Advantage of the present utility model and good effect are:
The utility model is using typical AC-DC-AC circuit and using ripe Power Electronic Technique to tested cable current Carry out precise control, direct current cables is connected to the filter capacity two ends of rectifier DC side, ac cable is connected to inverse Become the output two ends of device, heat ageing test can be carried out to ac cable and direct current cables so that electric cable heating is tested simultaneously More accurately and reliably, there is high precision, the features such as structure is simple and convenient to operate, can be widely used for ac cable and direct current cables Heat ageing test field.
Brief description
Fig. 1 is circuit theory diagrams of the present utility model;
Wherein, 1-380V AC power;2- isolating transformer;3- high-voltage insulating wire;4- rectifier bridge;5- filters Electric capacity;The tested direct current cables of 6-;7- inverter;The tested ac cable of 8-;9 full control switches.
Specific embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is further described:
A kind of device for alternating current-direct current cable heat ageing test, as shown in figure 1, inclusion isolating transformer 2, high pressure are exhausted Edge wire 3, rectifier bridge 4, filter capacitor 5, inverter 7 and full control switch 9.The former limit of described isolating transformer and 380V alternating current Source 1 is connected, and the secondary of this isolating transformer connects two input (binding post a of rectifier bridge by high-voltage insulating wire With binding post b), the output end parallel filtering electric capacity of this rectifier bridge and direct current cables terminals (binding post c and binding post D), tested direct current cables two end is connected on binding post c and binding post d;Described inverter is connected to whole by full control switch In the output end of stream bridge, the output end of inverter connects ac cable terminals (binding post e and binding post f), tested friendship Stream cable two end is connected on binding post e and binding post f.Described rectifier bridge and inverter are connected and composed by IGBT or IGCT.
Foregoing circuit can be encapsulated in a rack, and draw binding post a and binding post b, binding post c and connect Line terminals d and binding post e and binding post f.
The utility model using method is:
(1) 380V AC power is connected to isolating transformer former limit;
(2) with high-voltage insulating wire, isolating transformer secondary is connected on binding post a and binding post b;
(3) if necessary to carry out direct current cables heat run, then just tested direct current cables two end is connected on binding post c On binding post d;
(4) if necessary to carry out ac cable heat run, then just tested ac cable two end is connected on binding post e On binding post f.
(5) according to test demand, corresponding parameter is set it is possible to be controlled to the electric current in tested cable.
When using, should be noted:(1) if only carrying out DC heating test, then the power electronics device in inverter Part is all off, and full control switch needs are controlled to shutoff simultaneously, and e point and f point can be got up with short circuit;(2) if only carrying out exchange Heat run, then full control switch will be controlled to normal open, c point and d point disconnect.
It is emphasized that embodiment described in the utility model is illustrative rather than determinate, therefore this reality It is not limited to the embodiment described in specific embodiment with new inclusion, every new according to this practicality by those skilled in the art The other embodiment that the technical scheme of type draws, also belongs to the scope of the utility model protection.

Claims (2)

1. a kind of device for alternating current-direct current cable heat ageing test it is characterised in that:Including isolating transformer, rectifier bridge, Filter capacitor, inverter and full control switch, the former limit of described isolating transformer is connected with 380V AC power, this isolation transformation The secondary of device by high-voltage insulating wire connect rectifier bridge two inputs, the output end parallel filtering electric capacity of this rectifier bridge and Direct current cables terminals, tested direct current cables two end is connected on direct current cables terminals;Described inverter passes through full control switch even It is connected in the output end of rectifier bridge, the output end of inverter connects ac cable terminals, and tested ac cable two end is connected on friendship On stream cable termination.
2. a kind of device for alternating current-direct current cable heat ageing test according to claim 1 it is characterised in that:Described Rectifier bridge and inverter are connected and composed by IGBT or IGCT.
CN201620838543.5U 2016-08-03 2016-08-03 A device for handing over DC cable adds thermal ageing test Active CN205941734U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620838543.5U CN205941734U (en) 2016-08-03 2016-08-03 A device for handing over DC cable adds thermal ageing test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620838543.5U CN205941734U (en) 2016-08-03 2016-08-03 A device for handing over DC cable adds thermal ageing test

Publications (1)

Publication Number Publication Date
CN205941734U true CN205941734U (en) 2017-02-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620838543.5U Active CN205941734U (en) 2016-08-03 2016-08-03 A device for handing over DC cable adds thermal ageing test

Country Status (1)

Country Link
CN (1) CN205941734U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109633334A (en) * 2018-12-29 2019-04-16 广东电网有限责任公司 A kind of electric heating combines thermal cycling ageing method, apparatus, equipment and storage medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109633334A (en) * 2018-12-29 2019-04-16 广东电网有限责任公司 A kind of electric heating combines thermal cycling ageing method, apparatus, equipment and storage medium

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