CN105938187A - Ultrahigh-voltage current transformer feedthrough test method - Google Patents
Ultrahigh-voltage current transformer feedthrough test method Download PDFInfo
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- CN105938187A CN105938187A CN201610372579.3A CN201610372579A CN105938187A CN 105938187 A CN105938187 A CN 105938187A CN 201610372579 A CN201610372579 A CN 201610372579A CN 105938187 A CN105938187 A CN 105938187A
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- current transformer
- high voltage
- voltage current
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- insulating cylinder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Abstract
The invention relates to an ultrahigh-voltage current transformer feedthrough test method. During an onsite error test of an AC 1000kV ultrahigh-voltage current transformer, for the purpose of ensuring error test precision, a special-purpose primary lead wire support is employed, a primary lead wire is erected at a center position of the ultrahigh-voltage current transformer, and an actual operation working condition of the transformer is completely simulated for testing, so that the internal structure of the tested transformer can be prevented from being worn by a test lead wire, and it can also be ensured that a test result is the same as the actual operation state of a tested device.
Description
Technical field
The present invention relates to a kind of extra-high voltage current transformer punching method of testing.
Background technology
1000kV AC extra high voltage engineering is the key project of country, all plays an important role for alleviating the problem such as atmospheric pollution, energy skewness.The error testing project of the metering transformer used in extra-high voltage project is the forcible inspection of item of National Technical regulatory requirements, it is necessary to can put into operation after test and result are qualified.
In order to meet the needs of extra-high voltage project Large Copacity conveying electric energy, the no-load voltage ratio of extra-high voltage current transformer is much greater than traditional transformer, generally 6000A/1A, and is and is arranged on GIS(fully closed combined electric unit, employing SF6 gas-insulated).Traditional current transformer error test method is to test in installation site after current transformer installation, but owing to no-load voltage ratio is relatively big, after current transformer installation, primary current loop is longer, cannot be carried out error testing, it is therefore desirable to test in a pre-installation.
In 1000kV AC extra high voltage GIS, current transformer is the tubbiness equipment of a diameter 1.5-2.5 rice, and a length of about 3 meters, its structure is as shown in Figure 1.
During actual motion, primary conductive bar is arranged on the center of current transformer, realizes insulation by SF6 gas with transformer outer wall.Because error test is to carry out before current transformer is installed, therefore the inside of current transformer there is no conducting rod, needs the inside using special ultrahigh current wire through current transformer, it is achieved the error testing under rated current.
Ultrahigh current wire selects the multiply annealed copper wire meeting 6000A through-current capability in short-term, general 5, sectional area 250mm2 wire of selection.Test with ultrahigh current wire because of multiply annealed copper wire, and use multiply used in parallel, therefore, during test, phenomenon sagging, that be scattered can occur inside tested current transformer, it is impossible to be fixed on the center of tested current transformer, fit like a glove with the actual motion state of current transformer.And when error testing high-current conductor not center at tested device, the change in magnetic field can occur because of the skew of galvanic circle, so that error test result and actual motion state are not inconsistent, and affect test result.
Summary of the invention
The technical problem to be solved is to provide a kind of extra-high voltage current transformer punching method of testing.
For solving the problems referred to above, the technical solution used in the present invention is:
A kind of extra-high voltage current transformer punching method of testing, its operating procedure is as follows: find the central point of tested extra-high voltage current transformer；Before and after tested extra-high voltage current transformer, wire support is set, in the center of tested extra-high voltage current transformer, insulating cylinder is set, the two ends of described insulating cylinder are all beyond the port of tested extra-high voltage current transformer, and use the wire support of height-adjustable that described insulating cylinder is placed in wire support top, adjust the height of wire support, insulating cylinder is made to be positioned at the center of tested extra-high voltage current transformer, consistent with the actual operating mode of extra-high voltage current transformer；By ultrahigh current wire through described insulating cylinder, connect a wire loop, and pass to meet the rated current of the 6000A of scene test needs, simulate the actual operating mode of tested extra-high voltage current transformer, use relative method, carry out the error testing of tested extra-high voltage current transformer.
As preferably, after ultrahigh current wire is passed described insulating cylinder, confirm and adjust described insulating cylinder to be positioned at the center of described tested extra-high voltage current transformer.
As preferably, the multiply annealed copper wire meeting 6000A through-current capability in short-term selected by described ultrahigh current wire.
As preferably, sectional area 250mm selected by described ultrahigh current wire25, soft copper wire.
As preferably, the insulating cylinder of a diameter of 20cm of selection of described insulating cylinder.
As preferably, the two ends of described insulating cylinder are all beyond the port 50cm of tested extra-high voltage current transformer.
Use and have the beneficial effects that produced by technique scheme:
Operational approach of the present invention is simple, the actual operating mode utilizing method of the present invention can simulate extra-high voltage current transformer completely is tested, i.e. it is avoided that the internal structure of the test lead tested transformer of abrasion, can guarantee that again test result is identical with tested device actual motion state, making error test result be consistent with actual motion state, the test result obtained is the most credible.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, the accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of extra-high voltage current transformer.
Fig. 2 is the working method schematic diagram during test of scene of the present invention.
Fig. 3 is experiment work flow chart in scene of the present invention.
Wherein: 1 tested extra-high voltage current transformer, 1-1 coil, 2 insulating cylinders, 3 wire supports.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, with specific embodiment, invention is carried out clear, complete description below in conjunction with the accompanying drawings.
As it is shown in figure 1, be the structural representation of extra-high voltage current transformer, it is the tubbiness equipment of a diameter 1.5-2.5 rice, a length of about 3 meters.
Extra-high voltage current transformer punching method of testing of the present invention, its operating procedure is as follows:
First measure the diameter of tested extra-high voltage current transformer 1, put height, find the central point of tested extra-high voltage current transformer 1, the axis of the most tested extra-high voltage current transformer 1.
Before and after tested extra-high voltage current transformer 1, wire support 3 is set, in the center of tested extra-high voltage current transformer 1, a diameter of 20cm insulating cylinder 2 is set, the two ends of described insulating cylinder 2 are all beyond the port 50cm of tested extra-high voltage current transformer 1, and use the wire support 3 of height-adjustable that described insulating cylinder 2 is placed in wire support 3 top, adjust the height of wire support 3, insulating cylinder 2 is made to be positioned at the center of tested extra-high voltage current transformer 1, consistent with the actual operating mode of extra-high voltage current transformer 1.
Ultrahigh current wire is selected the multiply annealed copper wire meeting 6000A through-current capability in short-term through described insulating cylinder, described ultrahigh current wire, is preferably used sectional area 250mm25, soft copper wire.
After ultrahigh current wire is passed described insulating cylinder 2, confirm and adjust described insulating cylinder 2 to be positioned at the center of described tested extra-high voltage current transformer 1.
Connect a wire loop, and pass to meet the rated current of the 6000A of scene test needs, simulate the actual operating mode of tested extra-high voltage current transformer, use relative method, carry out the error testing of tested extra-high voltage current transformer.
Error testing method with by as the test method of conventional current transformer.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in previous embodiment still can be modified by it, or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.
Claims (6)
1. an extra-high voltage current transformer punching method of testing, it is characterised in that: its operating procedure is as follows: find the central point of tested extra-high voltage current transformer；Before and after tested extra-high voltage current transformer, wire support is set, in the center of tested extra-high voltage current transformer, insulating cylinder is set, the two ends of described insulating cylinder are all beyond the port of tested extra-high voltage current transformer, and use the wire support of height-adjustable that described insulating cylinder is placed in wire support top, adjust the height of wire support, insulating cylinder is made to be positioned at the center of tested extra-high voltage current transformer, consistent with the actual operating mode of extra-high voltage current transformer；By ultrahigh current wire through described insulating cylinder, connect a wire loop, and pass to meet the rated current of the 6000A of scene test needs, simulate the actual operating mode of tested extra-high voltage current transformer, use relative method, carry out the error testing of tested extra-high voltage current transformer.
A kind of extra-high voltage current transformer punching method of testing the most according to claim 1, it is characterised in that: after ultrahigh current wire is passed described insulating cylinder, confirm and adjust described insulating cylinder to be positioned at the center of described tested extra-high voltage current transformer.
A kind of extra-high voltage current transformer punching method of testing the most according to claim 1 and 2, it is characterised in that: the multiply annealed copper wire meeting 6000A through-current capability in short-term selected by described ultrahigh current wire.
A kind of extra-high voltage current transformer punching method of testing the most according to claim 3, it is characterised in that: sectional area 250mm selected by described ultrahigh current wire25, soft copper wire.
A kind of extra-high voltage current transformer punching method of testing the most according to claim 1 and 2, it is characterised in that: the insulating cylinder of a diameter of 20cm of selection of described insulating cylinder.
A kind of extra-high voltage current transformer punching method of testing the most according to claim 1 and 2, it is characterised in that: the two ends of described insulating cylinder are all beyond the port 50cm of tested extra-high voltage current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372579.3A CN105938187A (en) | 2016-05-31 | 2016-05-31 | Ultrahigh-voltage current transformer feedthrough test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610372579.3A CN105938187A (en) | 2016-05-31 | 2016-05-31 | Ultrahigh-voltage current transformer feedthrough test method |
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| CN105938187A true CN105938187A (en) | 2016-09-14 |
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| CN201610372579.3A Pending CN105938187A (en) | 2016-05-31 | 2016-05-31 | Ultrahigh-voltage current transformer feedthrough test method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819264A (en) * | 2010-05-10 | 2010-09-01 | 山西省机电设计研究院 | Portable type current transformer calibrating device |
| CN202217048U (en) * | 2011-08-24 | 2012-05-09 | 国网电力科学研究院武汉南瑞有限责任公司 | Automatic detecting wire cross-core guiding assembly for low voltage current transformer |
| CN202948126U (en) * | 2012-12-05 | 2013-05-22 | 河北省电力公司电力科学研究院 | Current transformer site error test system |
| CN203909265U (en) * | 2014-06-16 | 2014-10-29 | 国网上海市电力公司 | Insulation, voltage-resistant and error calibrating device for metering low-voltage current transformer |
-
2016
- 2016-05-31 CN CN201610372579.3A patent/CN105938187A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819264A (en) * | 2010-05-10 | 2010-09-01 | 山西省机电设计研究院 | Portable type current transformer calibrating device |
| CN202217048U (en) * | 2011-08-24 | 2012-05-09 | 国网电力科学研究院武汉南瑞有限责任公司 | Automatic detecting wire cross-core guiding assembly for low voltage current transformer |
| CN202948126U (en) * | 2012-12-05 | 2013-05-22 | 河北省电力公司电力科学研究院 | Current transformer site error test system |
| CN203909265U (en) * | 2014-06-16 | 2014-10-29 | 国网上海市电力公司 | Insulation, voltage-resistant and error calibrating device for metering low-voltage current transformer |
Non-Patent Citations (2)
| Title |
|---|
| 张小燕，王乐仁: "JJG313-2010《测量用电流互感器》检定规程解读", 《中国计量》 * |
| 陈雪松，刘延泽: "穿心式电流互感器检定方法介绍", 《内蒙古电力技术》 * |
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Application publication date: 20160914 |
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