CN103308793A - Testing device for heating direct-current cable - Google Patents
Testing device for heating direct-current cable Download PDFInfo
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- CN103308793A CN103308793A CN2013100992125A CN201310099212A CN103308793A CN 103308793 A CN103308793 A CN 103308793A CN 2013100992125 A CN2013100992125 A CN 2013100992125A CN 201310099212 A CN201310099212 A CN 201310099212A CN 103308793 A CN103308793 A CN 103308793A
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- bridge rectifier
- electric capacity
- rectifier circuit
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Abstract
The invention relates to a testing device for heating a direct-current cable, and relates to a testing device of a cable. The conventional testing device, namely a cross-under type cable heating transformer, only can test alternating-current cables. The testing device is characterized by comprising a transformer, an alternating-current cable, a bridge type rectification circuit and a filter circuit, wherein the transformer comprises an iron core and a primary coil; the alternating-current cable is served as the primary coil; both ends of the alternating-current cable are connected with the input end of the bridge type rectification circuit; and the output end of the bridge type rectification circuit is connected with the filter circuit and the direct-current cable to be tested. Alternating current with high voltage and small current is converted into alternating current with low voltage and large current through the transformer, then converted into direct current with large current through the bridge type rectification circuit and the filter circuit, and then flown into the direct-current cable to be tested to generate heat in a conductor, so that the problem of heating the direct-current cable is solved, the purpose of cable heat ageing test is achieved, and the testing device is simple in structure and convenient to operate.
Description
Technical field
The present invention relates to a kind of test unit of cable.
Background technology
In the existing high-tension cable heat test, need to produce thousands of amperes big current device, all adopt cross under type cable heating transformer that high-tension cable is carried out big current flow heats test both at home and abroad.Tested cable must pass the hole of transformer core, and tested cable need become the secondary coil of transformer.After cross under type cable heating transformer fed electric current, because the galvanomagnetic effect of secondary coil, tested cable itself produced heat, reaches the purpose of cable heat ageing test.
Conventional experimental provision---cross under type cable heating transformer can only be tested ac cable.Application and Development is in the heat test device of direct current cables on this basis.
Summary of the invention
The technical assignment of the technical problem to be solved in the present invention and proposition is that the prior art scheme is improved and improved, and a kind of test unit for the direct current cables heating is provided, to solve direct current cables heat test purpose.For this reason, the present invention takes following technical scheme.
A kind of test unit for the direct current cables heating, it is characterized in that: comprise transformer, ac cable, bridge rectifier circuit, filtering circuit, described transformer comprises iron core, primary coil, described ac cable is as secondary coil, the two ends of ac cable connect the input end of bridge rectifier circuit, and the output terminal of bridge rectifier circuit connects filtering circuit and tested direct current cables.The alternating current of the little electric current of high voltage changes the alternating current of low-voltage and high-current into through transformer, afterwards by bridge rectifier circuit, filtering circuit, become the direct current of big electric current, flow in the tested direct current cables, in conductor, produce heat, solve the direct current cables heating problems, reach the purpose of cable heat ageing test.Simple in structure, easy to operate.
As the further of technique scheme improved and replenish, the present invention also comprises following additional technical feature.
Described filtering circuit comprises first electric capacity, second electric capacity that is connected with the bridge rectifier circuit output terminal respectively, and first electric capacity links to each other with second electric capacity, the junction ground connection of first electric capacity and second electric capacity.
Described iron core is established the hole, and described ac cable passes the Kong Houyu bridge rectifier circuit and links to each other.Ac cable passes the continuous reliability of using that improves of Kong Houyu bridge rectifier circuit.
Described bridge rectifier circuit comprises four field effect transistor by the control of PWM controller.
Beneficial effect: the alternating current of the little electric current of high voltage changes the alternating current of low-voltage and high-current into through transformer, afterwards by bridge rectifier circuit, filtering circuit, become the direct current of big electric current, flow in the tested direct current cables, in conductor, produce heat, solve the direct current cables heating problems, reach the purpose of cable heat ageing test.Simple in structure, easy to operate.
Description of drawings
Fig. 1 is structural representation of the present invention.
Among the figure: the 1-ac cable; The 2-bridge rectifier circuit; 3-first electric capacity, second electric capacity; The tested direct current cables of 4-; The 5-transformer.
Embodiment
Below in conjunction with Figure of description technical scheme of the present invention is described in further detail.
The present invention includes transformer 5, ac cable 1, bridge rectifier circuit 2, filtering circuit, transformer 5 comprises iron core, primary coil, ac cable 1 is as secondary coil, the two ends of ac cable 1 connect the input end of bridge rectifier circuit 2, and the output terminal of bridge rectifier circuit 2 connects filtering circuit and tested direct current cables 4.Filtering circuit comprises that first electric capacity 3, second electric capacity, 3, the first electric capacity 3 that are connected with bridge rectifier circuit 2 output terminals respectively link to each other the junction ground connection of first electric capacity 3 and second electric capacity 3 with second electric capacity 3.Iron core is established the hole, and ac cable 1 passes Kong Houyu bridge rectifier circuit 2 and links to each other.Bridge rectifier circuit 2 comprises four field effect transistor by the control of PWM controller.
The alternating current of the little electric current of high voltage changes the alternating current of low-voltage and high-current into through transformer 5, by bridge rectifier circuit 2, filtering circuit, become the direct current of big electric current afterwards, flow in the tested direct current cables 4, in conductor, produce heat, solve the direct current cables heating problems.
More than a kind of test unit for the direct current cables heating shown in Figure 1 be specific embodiments of the invention; substantive distinguishing features and marked improvement that the present invention gives prominence to have been embodied; can be according to the use needs of reality; under enlightenment of the present invention; it is carried out the equivalent modifications of aspects such as shape, structure, all at the row of the protection domain of this programme.
Claims (4)
1. one kind is used for the test unit that direct current cables heats, it is characterized in that: comprise transformer (5), ac cable (1), bridge rectifier circuit (2), filtering circuit, described transformer (5) comprises iron core, primary coil, described ac cable (1) is as secondary coil, the two ends of ac cable (1) connect the input end of bridge rectifier circuit (2), and the output terminal of bridge rectifier circuit (2) connects filtering circuit and tested direct current cables (4).
2. a kind of test unit for direct current cables heating according to claim 1, it is characterized in that: described filtering circuit comprises first electric capacity (3), second electric capacity (3) that is connected with bridge rectifier circuit (2) output terminal respectively, first electric capacity (3) links to each other with second electric capacity (3), the junction ground connection of first electric capacity (3) and second electric capacity (3).
3. a kind of test unit for direct current cables heating according to claim 1, it is characterized in that: described iron core is established the hole, and described ac cable (1) passes Kong Houyu bridge rectifier circuit (2) and links to each other.
4. a kind of test unit for direct current cables heating according to claim 1, it is characterized in that: described bridge rectifier circuit (2) comprises four field effect transistor by the control of PWM controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310099212.5A CN103308793B (en) | 2013-03-26 | 2013-03-26 | A kind of experimental rig for direct current cables heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310099212.5A CN103308793B (en) | 2013-03-26 | 2013-03-26 | A kind of experimental rig for direct current cables heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103308793A true CN103308793A (en) | 2013-09-18 |
| CN103308793B CN103308793B (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310099212.5A Active CN103308793B (en) | 2013-03-26 | 2013-03-26 | A kind of experimental rig for direct current cables heating |
Country Status (1)
| Country | Link |
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| CN (1) | CN103308793B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849589A (en) * | 2015-05-06 | 2015-08-19 | 国网青海省电力公司黄化供电公司 | Heater operation monitoring device |
| CN106569065A (en) * | 2016-11-03 | 2017-04-19 | 国网浙江省电力公司舟山供电公司 | DC cable thermal cycle voltage test device |
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| JPH0618587A (en) * | 1992-07-02 | 1994-01-25 | Fujikura Ltd | Method for applied voltage test of dc power cable |
| JPH0882648A (en) * | 1994-09-13 | 1996-03-26 | Taku Tanaka | Disconnection detecting device for connecting cable |
| CN2462276Y (en) * | 2001-02-12 | 2001-11-28 | 北京市京中麒电器有限责任公司 | Heating heater |
| CN101247695A (en) * | 2008-03-03 | 2008-08-20 | 大连交通大学 | Filament open-circuit protector for constant-current light modulation system of air station navigation light |
| CN201360226Y (en) * | 2008-12-03 | 2009-12-09 | 河北晶龙阳光设备有限公司 | Adjustable DC power supply with low voltage and high current |
| CN101605411A (en) * | 2009-06-26 | 2009-12-16 | 王正 | Be applied to the medium-frequency heating system of thickened oil recovery |
| JP2010272412A (en) * | 2009-05-22 | 2010-12-02 | Toyota Motor Corp | Cable-housing device and vehicle equipped with the same |
| CN201673132U (en) * | 2010-01-14 | 2010-12-15 | 上海蓝波高电压技术设备有限公司 | High-power cable cyclic heating testing control device |
| CN201812644U (en) * | 2010-06-04 | 2011-04-27 | 陕西汉中变压器有限责任公司 | 7500kVA/35kV split type direct current ice-melting transformer core |
| CN102680819A (en) * | 2012-04-28 | 2012-09-19 | 中国科学院电工研究所 | Accelerated life test circuit and test method of power electronic device |
| CN203259604U (en) * | 2013-03-26 | 2013-10-30 | 浙江省电力公司舟山电力局 | Testing device for direct current cable heating |
-
2013
- 2013-03-26 CN CN201310099212.5A patent/CN103308793B/en active Active
Patent Citations (11)
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|---|---|---|---|---|
| JPH0618587A (en) * | 1992-07-02 | 1994-01-25 | Fujikura Ltd | Method for applied voltage test of dc power cable |
| JPH0882648A (en) * | 1994-09-13 | 1996-03-26 | Taku Tanaka | Disconnection detecting device for connecting cable |
| CN2462276Y (en) * | 2001-02-12 | 2001-11-28 | 北京市京中麒电器有限责任公司 | Heating heater |
| CN101247695A (en) * | 2008-03-03 | 2008-08-20 | 大连交通大学 | Filament open-circuit protector for constant-current light modulation system of air station navigation light |
| CN201360226Y (en) * | 2008-12-03 | 2009-12-09 | 河北晶龙阳光设备有限公司 | Adjustable DC power supply with low voltage and high current |
| JP2010272412A (en) * | 2009-05-22 | 2010-12-02 | Toyota Motor Corp | Cable-housing device and vehicle equipped with the same |
| CN101605411A (en) * | 2009-06-26 | 2009-12-16 | 王正 | Be applied to the medium-frequency heating system of thickened oil recovery |
| CN201673132U (en) * | 2010-01-14 | 2010-12-15 | 上海蓝波高电压技术设备有限公司 | High-power cable cyclic heating testing control device |
| CN201812644U (en) * | 2010-06-04 | 2011-04-27 | 陕西汉中变压器有限责任公司 | 7500kVA/35kV split type direct current ice-melting transformer core |
| CN102680819A (en) * | 2012-04-28 | 2012-09-19 | 中国科学院电工研究所 | Accelerated life test circuit and test method of power electronic device |
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| 刘青立: "一种高电压大电流直流固体继电器的寿命试验方案", 《机电元件》, vol. 28, no. 3, 30 September 2008 (2008-09-30) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849589A (en) * | 2015-05-06 | 2015-08-19 | 国网青海省电力公司黄化供电公司 | Heater operation monitoring device |
| CN106569065A (en) * | 2016-11-03 | 2017-04-19 | 国网浙江省电力公司舟山供电公司 | DC cable thermal cycle voltage test device |
| CN106569065B (en) * | 2016-11-03 | 2023-09-05 | 国网浙江省电力公司舟山供电公司 | Direct current cable thermal cycle voltage test device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103308793B (en) | 2016-05-11 |
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