CN103336196A - Measuring method of oil/gas sleeve outgoing line type transformer - Google Patents
Measuring method of oil/gas sleeve outgoing line type transformer Download PDFInfo
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- CN103336196A CN103336196A CN2013102465047A CN201310246504A CN103336196A CN 103336196 A CN103336196 A CN 103336196A CN 2013102465047 A CN2013102465047 A CN 2013102465047A CN 201310246504 A CN201310246504 A CN 201310246504A CN 103336196 A CN103336196 A CN 103336196A
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Abstract
The invention relates to the technical field of power transformers, and discloses a measuring method of an oil/gas sleeve outgoing line type transformer. The transformer comprises a main transformer primary side oil/gas sleeve and a main transformer secondary side oil/gas sleeve, which are connected to SF6 gas chambers, and the transformer is connected to GIS (Geographic Information System) equipment. The method comprises the following steps: S1, a main transformer primary side switch and a main transformer secondary side switch are opened when the main transformer primary side oil/gas sleeve, the main transformer secondary side oil/gas sleeve, the SF6 gas chambers and the GIS equipment are in a sealing state; S2, the short circuit of outgoing lines of the two sleeves and a neutral point of the transformer is realized by using an experiment wire; S3, a high voltage is applied to the neutral point of the transformer, the insulating resistance of a high-voltage winding and a medium-voltage winding to a low-voltage winding and the ground are respectively measured, and the insulating resistance of the low-voltage winding to the high-voltage winding and the medium-voltage winding are respectively measured. The method provided by the invention has feasibility, and is short in consumed time and low in cost.
Description
Technical field
The present invention relates to the power transformer technical field, especially relate to the measuring method that a kind of oil/gas bushing goes out the line style transformer.
Background technology
In the large-scale power transformer that puts into operation in recent years, in order to realize being connected with GIS, transformer high-voltage outlet sleeve pipe generally adopts insulating oil/SF6 gas formation high-voltage capacitance molded cannula (being called for short oil/gas bushing).Oil/gas bushing goes out the line style transformer owing to the device structure reason, when routine test is carried out to equipment in the scene, oil/gas bushing, SF6 air chamber, GIS etc. need be opened, and reclaim SF6 gas, and work difficulty is big, and spended time is long, expends the cost height.
Summary of the invention
The present invention provides a kind of oil/gas bushing to go out the measuring method of line style transformer for overcoming above-mentioned deficiency of the prior art.
The present invention is achieved through the following technical solutions above-mentioned purpose.
A kind of oil/gas bushing goes out the measuring method of line style transformer, described transformer comprises main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing, main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing all are connected with the SF6 air chamber, and transformer is connected with GIS equipment; Step comprises:
S1: keep opening main transformer primary side disconnecting link and main transformer secondary side disconnecting link under the sealing state at main transformer primary side oil/gas bushing, main transformer secondary side oil/gas bushing, SF6 air chamber, GIS equipment; S2: with outlet and the transformer neutral point test wire short circuit of main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing, step down side winding short circuit; S3: the place applies high voltage at transformer neutral point, measures high, middle pressure winding respectively to the insulation resistance on low pressure winding and ground, measures the low pressure winding respectively to insulation resistance high, middle pressure winding.
Above-mentioned step also comprises S4: measure high, middle pressure winding respectively to the dielectric dissipation factor on low pressure winding and ground, measure the low pressure winding respectively to dielectric dissipation factor high, middle pressure winding.Measured value and factory-said value are compared, can judge further whether transformer has problems.
Above-mentioned step also comprises S5: the resistance of measuring main-transformer three phase windings respectively.Measured value and factory-said value are compared, can judge further whether transformer has problems.
Above-mentioned step also comprises S6: remove high voltage, apply trial voltage between main transformer primary side disconnecting link and main transformer secondary side disconnecting link, measure electric capacity and the dielectric dissipation factor of main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing respectively.Measured value and factory-said value are compared, can judge further whether transformer has problems.
The present invention compared with prior art mainly has following beneficial effect: need not open measuring transformer winding insulation resistance parameter under the prerequisite of oil/gas bushing, SF6 air chamber, GIS equipment, compare with factory-said value then, can judge whether transformer has problems.Evidence Transformer Winding insulation measurement value and the factory-said value error after relatively is within allowed band, and measured value has consistance, and data are reliable.The method has feasibility, and takes a short time, and it is low to expend cost.
Description of drawings
Fig. 1 is the circuit connection diagram when measuring high, middle pressure winding to the parameters on low pressure winding and ground among the embodiment.
Fig. 2 is the circuit connection diagram when measuring the low pressure winding to the parameters of high, middle pressure winding among the embodiment.
Fig. 3 is measured value and the factory-said value contrast table of Transformer Winding insulation resistance among the embodiment.
Fig. 4 is measured value and the factory-said value contrast table of Transformer Winding electric capacity and dielectric dissipation factor among the embodiment.
Fig. 5 is measured value and the factory-said value contrast table of the resistance of transformer three phase windings among the embodiment.
Fig. 6 is measured value and the factory-said value contrast table of bushing shell for transformer and dielectric dissipation factor among the embodiment.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.Accompanying drawing only is used for exemplary illustration, can not be interpreted as the restriction to this patent.
For more succinct explanation present embodiment, some well known to a person skilled in the art but can omit to some extent with the incoherent parts of main contents of the present invention in accompanying drawing or the explanation.For ease of statement, some parts has omission, amplifies or dwindles in the accompanying drawing, but does not represent size or the entire infrastructure of actual product in addition.
Embodiment 1:
A kind of oil/gas bushing goes out the measuring method of line style transformer, described transformer comprises main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing, main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing all are connected with the SF6 air chamber, and transformer is connected with GIS equipment; Step comprises S1: under the prerequisite of not opening main transformer primary side oil/gas bushing, main transformer secondary side oil/gas bushing, SF6 air chamber, GIS equipment, open main transformer primary side disconnecting link and main transformer secondary side disconnecting link; S2: with outlet and the transformer neutral point test wire short circuit of main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing, step down side winding ax short circuit; S3: apply the 5000V high voltage at the transformer neutral point place, connected mode is as shown in Figure 1 measured high, middle pressure winding respectively to the insulation resistance on low pressure winding and ground; Connected mode is as shown in Figure 2 measured the low pressure winding respectively to insulation resistance high, middle pressure winding.Measured value and factory-said value are as shown in Figure 3.Because the test wire between transformer neutral point and main transformer primary side disconnecting link and the main transformer secondary side disconnecting link has certain length, there is the interference of stray capacitance over the ground in pressurization back test wire, there are error in test data and factory data, but Changing Pattern and delivery test data consistency according to data are better, reliability that can decision data.Because the test wire of step down side is shorter, high pressure and the middle winding earth of pressing apply the 5000V trial voltage in low-pressure side, the winding insulation resistance data that records and transformer factory data basically identical.Thereby the proof transformer is no problem on this parameter.
Present embodiment also comprises step S4: measure high, middle pressure winding respectively to the dielectric dissipation factor on low pressure winding and ground, measure the low pressure winding respectively to dielectric dissipation factor high, middle pressure winding.Measured value and factory-said value as shown in Figure 4, the influence that the measured value Pass Test mode of connection changes, thus the proof transformer is no problem on this parameter.
Present embodiment also comprises step S5: the resistance of measuring main-transformer A, B, C three phase windings respectively.Measured value and factory-said value as shown in Figure 5, measured value and factory-said value relatively, error is in allowed band, thus the proof transformer is no problem on this parameter.
Present embodiment also comprises step S6: remove high voltage, extend respectively with main transformer secondary side disconnecting link place at main transformer primary side disconnecting link and to be connected test wire, then guarantee equipment by prerequisite under apply trial voltage, measure electric capacity and the dielectric dissipation factor of main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing respectively.Measured value and factory-said value are as shown in Figure 6.Measured value and factory-said value compare, and error is in allowed band, thereby the proof transformer is no problem on this parameter.
Every major parameter of present embodiment measuring transformer under the prerequisite that need not open main transformer primary side oil/gas bushing, main transformer secondary side oil/gas bushing, SF6 air chamber, GIS equipment, compare with factory-said value then, thereby can judge whether transformer has problems.The measured value that evidence adopts the present embodiment method to draw has consistance, and data are reliable.The method has feasibility, and takes a short time, and it is low to expend cost.
Below only be a specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all the present invention of utilization conceive the insubstantial modifications that the present invention is made, and all fall within protection scope of the present invention.
Claims (4)
1. an oil/gas bushing goes out the measuring method of line style transformer, described transformer comprises main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing, main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing all are connected with the SF6 air chamber, transformer is connected with GIS equipment, it is characterized in that:
S1: be under the sealing state at main transformer primary side oil/gas bushing, main transformer secondary side oil/gas bushing, SF6 air chamber, GIS equipment, open main transformer primary side disconnecting link and main transformer secondary side disconnecting link;
S2: with outlet and the transformer neutral point test wire short circuit of main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing, step down side winding short circuit;
S3: the place applies high voltage at transformer neutral point, measures high, middle pressure winding respectively to the insulation resistance on low pressure winding and ground, measures the low pressure winding respectively to insulation resistance high, middle pressure winding.
2. oil/gas bushing according to claim 1 goes out the measuring method of line style transformer, it is characterized in that: also comprise step S4: measure high, middle pressure winding respectively to the dielectric dissipation factor on low pressure winding and ground, measure the low pressure winding respectively to dielectric dissipation factor high, middle pressure winding.
3. oil/gas bushing according to claim 1 goes out the measuring method of line style transformer, it is characterized in that: also comprise step S5: the resistance of measuring main-transformer three phase windings respectively.
4. oil/gas bushing according to claim 1 goes out the measuring method of line style transformer, it is characterized in that: also comprise step S6: remove high voltage, between main transformer primary side disconnecting link and main transformer secondary side disconnecting link, apply trial voltage, measure electric capacity and the dielectric dissipation factor of main transformer primary side oil/gas bushing and main transformer secondary side oil/gas bushing respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310246504.7A CN103336196B (en) | 2013-06-20 | 2013-06-20 | A kind of measuring method of oil/gas sleeve pipe outgoing-line type transformer |
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| CN201310246504.7A CN103336196B (en) | 2013-06-20 | 2013-06-20 | A kind of measuring method of oil/gas sleeve pipe outgoing-line type transformer |
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| CN103336196B CN103336196B (en) | 2015-11-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019022A (en) * | 2016-07-05 | 2016-10-12 | 国网辽宁省电力有限公司丹东供电公司 | Cover plate test device for connection air chamber of oil-gas type transformer and GIS and method for operating device |
| CN107727989A (en) * | 2017-10-10 | 2018-02-23 | 大唐国际发电股份有限公司北京高井热电厂 | The test method of oil-gas casing structure transformer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970267B (en) * | 2017-03-17 | 2019-10-08 | 郑州旭飞光电科技有限公司 | Measurement method, controller and the control system of conductor insulation against ground resistance |
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| CN106019022A (en) * | 2016-07-05 | 2016-10-12 | 国网辽宁省电力有限公司丹东供电公司 | Cover plate test device for connection air chamber of oil-gas type transformer and GIS and method for operating device |
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| CN107727989A (en) * | 2017-10-10 | 2018-02-23 | 大唐国际发电股份有限公司北京高井热电厂 | The test method of oil-gas casing structure transformer |
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