CN103245834B - Deformation of transformer winding low-voltage impedance on-the-spot test method - Google Patents
Deformation of transformer winding low-voltage impedance on-the-spot test method Download PDFInfo
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- CN103245834B CN103245834B CN201310182233.3A CN201310182233A CN103245834B CN 103245834 B CN103245834 B CN 103245834B CN 201310182233 A CN201310182233 A CN 201310182233A CN 103245834 B CN103245834 B CN 103245834B
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- 238000004804 winding Methods 0.000 title claims abstract description 21
- 238000010998 test method Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000007935 neutral effect Effects 0.000 claims description 9
- 230000009466 transformation Effects 0.000 claims description 9
- 238000013461 design Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
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Abstract
The present invention relates to a kind of deformation of transformer winding low-voltage impedance on-the-spot test method, its technical characteristics is: comprise adopt low-voltage impedance tester respectively the low-voltage impedance method of Hi-pot test point test transformer high-voltage centering pressure, at Hi-pot test point test transformer high-voltage to the low-voltage impedance method of low pressure with press short-circuit impedance method to low pressure in middle pressure test point test transformer.The present invention is reasonable in design, it adopts traditional low-voltage impedance tester low-voltage impedance that difference testing high voltage centering is pressed under the state of not tearing transformer lead open, high pressure to the low-voltage impedance of low pressure, middle pressure to the low-voltage impedance of low pressure, winding deformation is tested and is more close to on-the-spot operation reality, be in particular the measurement that is high, medium voltage side low-voltage impedance of oily tubing and casing Cable Transformer and provide convenient, quick, reliable measuring method.
Description
Technical field
The invention belongs to transformer technology field, especially a kind of deformation of transformer winding low-voltage impedance on-the-spot test method.
Background technology
At present, carry out transformer carry out winding deformation low-voltage impedance test time, can carry out after transformer three side lead-in wire must being removed, particularly for oily tubing and casing cable outlet transformer, must by cable bin oil return, open door, can carry out wiring experiment work, this greatly adds the workload of site test personnel.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of reasonable in design, deformation of transformer winding low-voltage impedance on-the-spot test method that reliability is high, easy to use is provided.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of deformation of transformer winding low-voltage impedance on-the-spot test method, comprise adopt low-voltage impedance tester respectively the low-voltage impedance method of Hi-pot test point test transformer high-voltage centering pressure, at Hi-pot test point test transformer high-voltage to the low-voltage impedance method of low pressure with press short-circuit impedance method to low pressure in middle pressure test point test transformer.
And the method for the low-voltage impedance of described testing high voltage centering pressure comprises the following steps:
(1) respectively high-voltage side bus, medium voltage side bus, three disconnectores between low-pressure side bus and Transformer Winding are disconnected, thus disconnect contacting of transformer and other primary equipments;
(2) the ground connection of the grounding switch of high voltage side of transformer is opened in flakes, and be connected respectively with three passages of low-voltage impedance tester, for injecting and collecting test signal;
(3) the ground connection of the grounding switch of transformer medium voltage side is opened in flakes, by wire, the three-phase of transformer is carried out short circuit, to realize the short circuit of medium voltage side;
(4) make the grounding switch of step down side be in off-state, to realize low-pressure side open circuit;
(5) keep transformation isolated neutral state;
(6), after connecting in a manner described, realized the low-voltage impedance test function of high pressure centering pressure by low-voltage impedance tester.
And the method for described testing high voltage to the low-voltage impedance of low pressure comprises the following steps:
(1) respectively high-voltage side bus, medium voltage side bus, three disconnectores between low-pressure side bus and Transformer Winding are disconnected, thus disconnect contacting of transformer and other primary equipments;
(2) the ground connection of the grounding switch of high voltage side of transformer is opened in flakes, and be connected respectively with three passages of low-voltage impedance tester, for injecting and collecting test signal;
(3) the ground connection of the grounding switch of step down side is opened in flakes, by wire, the three-phase of transformer is carried out short circuit, to realize the short circuit of low-pressure side;
(4) make the grounding switch of transformer medium voltage side be in off-state, to realize medium voltage side open circuit;
(5) keep transformation isolated neutral state;
(6), after connecting in a manner described, realize the low-voltage impedance test function of high pressure to low pressure by low-voltage impedance tester.
And, press the method for the low-voltage impedance to low pressure to comprise the following steps in described test:
(1) respectively high-voltage side bus, medium voltage side bus, three disconnectores between low-pressure side bus and Transformer Winding are disconnected, thus disconnect contacting of transformer and other primary equipments;
(2) the ground connection of the grounding switch of transformer medium voltage side is opened in flakes, and be connected respectively with three passages of low-voltage impedance tester, for injecting and collecting test signal;
(3) the ground connection of the grounding switch of step down side is opened in flakes, by wire, the three-phase of transformer is carried out short circuit, to realize the short circuit of low-pressure side;
(4) make the grounding switch of transformer medium voltage side be in off-state, to realize medium voltage side open circuit;
(5) keep transformation isolated neutral state;
(6), after connecting in a manner described, in being realized by low-voltage impedance tester, press the low-voltage impedance test function to low pressure.
Advantage of the present invention and good effect are:
The present invention is reasonable in design, it adopts traditional low-voltage impedance tester low-voltage impedance that difference testing high voltage centering is pressed under the state of not tearing transformer lead open, high pressure to the low-voltage impedance of low pressure, middle pressure to the low-voltage impedance of low pressure, winding deformation is tested and is more close to on-the-spot operation reality, be in particular the measurement that is high, medium voltage side low-voltage impedance of oily tubing and casing Cable Transformer and provide convenient, quick, reliable measuring method.
Accompanying drawing explanation
Fig. 1 is elementary diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of deformation of transformer winding low-voltage impedance on-the-spot test method, elementary diagram is as shown in Figure 1 adopted to be connected with Transformer Winding by traditional low-voltage impedance tester, equipment in figure and connecting line are three-phase symmetrical equipment, for clear statement, the feature according to electric system represents with monophasic configuration.Method of testing of the present invention comprise adopt low-voltage impedance tester respectively the low-voltage impedance method of Hi-pot test point test transformer high-voltage centering pressure, at Hi-pot test point test transformer high-voltage to the low-voltage impedance method of low pressure with press short-circuit impedance method to low pressure in middle pressure test point test transformer.Concrete grammar is:
The low-voltage impedance method of testing high voltage centering pressure comprises the following steps:
(1) respectively high-voltage side bus, medium voltage side bus, three disconnectores (disconnector 1,2,3) between low-pressure side bus and Transformer Winding are disconnected, thus disconnect contacting of transformer and other primary equipments, do not affect test result;
(2) the ground connection of the grounding switch (grounding switch 1) of high voltage side of transformer is opened in flakes, and be connected respectively with three passages (A, B, C three-phase) of low-voltage impedance tester, for injecting and collecting test signal;
(3) the ground connection of the grounding switch (grounding switch 2) of transformer medium voltage side is opened in flakes, by wire, the three-phase of transformer is carried out short circuit, to realize the short circuit of medium voltage side;
(4) make the grounding switch of step down side (grounding switch 3) be in off-state, to realize low-pressure side open circuit;
(5) keep transformation isolated neutral state;
(6), after connecting in a manner described, namely realize the low-voltage impedance test function of high pressure centering pressure by low-voltage impedance tester.
The low-voltage impedance method of testing high voltage to low pressure comprises the following steps:
(1) respectively high-voltage side bus, medium voltage side bus, three disconnectores (disconnector 1,2,3) between low-pressure side bus and Transformer Winding are disconnected, thus disconnect contacting of transformer and other primary equipments, do not affect test result;
(2) the ground connection of the grounding switch (grounding switch 1) of high voltage side of transformer is opened in flakes, and be connected respectively with three passages (A, B, C three-phase) of low-voltage impedance tester, for injecting and collecting test signal;
(3) the ground connection of the grounding switch (grounding switch 3) of step down side is opened in flakes, by wire, the three-phase of transformer is carried out short circuit, to realize the short circuit of low-pressure side;
(4) make the grounding switch of transformer medium voltage side (grounding switch 2) be in off-state, to realize medium voltage side open circuit;
(5) keep transformation isolated neutral state;
(6), after connecting in a manner described, namely realize the low-voltage impedance test function of high pressure to low pressure by low-voltage impedance tester.
Press in test and the low-voltage impedance method of low pressure comprised the following steps:
(1) respectively high-voltage side bus, medium voltage side bus, three disconnectores (disconnector 1,2,3) between low-pressure side bus and Transformer Winding are disconnected, thus disconnect contacting of transformer and other primary equipments, do not affect test result;
(2) the ground connection of the grounding switch (grounding switch 2) of transformer medium voltage side is opened in flakes, and be connected respectively with three passages (A, B, C three-phase) of low-voltage impedance tester, for injecting and collecting test signal;
(3) the ground connection of the grounding switch (grounding switch 3) of step down side is opened in flakes, by wire, the three-phase of transformer is carried out short circuit, to realize the short circuit of low-pressure side;
(4) make the grounding switch of transformer medium voltage side (grounding switch 2) be in off-state, to realize medium voltage side open circuit;
(5) keep transformation isolated neutral state;
(6), after connecting in a manner described, in namely realizing by low-voltage impedance tester, press the low-voltage impedance test function to low pressure.
It is emphasized that; embodiment of the present invention is illustrative; instead of it is determinate; therefore the present invention includes the embodiment be not limited to described in embodiment; every other embodiments drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (1)
1. a deformation of transformer winding low-voltage impedance on-the-spot test method, comprise adopt low-voltage impedance tester respectively the low-voltage impedance method of Hi-pot test point test transformer high-voltage centering pressure, at Hi-pot test point test transformer high-voltage to the low-voltage impedance method of low pressure with press short-circuit impedance method to low pressure in middle pressure test point test transformer; It is characterized in that:
The method of the low-voltage impedance of described testing high voltage centering pressure comprises the following steps:
(1) respectively high-voltage side bus, medium voltage side bus, three disconnectores between low-pressure side bus and Transformer Winding are disconnected, thus disconnect contacting of transformer and other primary equipments;
(2) the ground connection of the grounding switch of high voltage side of transformer is opened in flakes, and be connected respectively with three passages of low-voltage impedance tester, for injecting and collecting test signal;
(3) the ground connection of the grounding switch of transformer medium voltage side is opened in flakes, by wire, the three-phase of transformer is carried out short circuit, to realize the short circuit of medium voltage side;
(4) make the grounding switch of step down side be in off-state, to realize low-pressure side open circuit;
(5) keep transformation isolated neutral state;
(6), after connecting in a manner described, realized the low-voltage impedance test function of high pressure centering pressure by low-voltage impedance tester;
The method of described testing high voltage to the low-voltage impedance of low pressure comprises the following steps:
(1) respectively high-voltage side bus, medium voltage side bus, three disconnectores between low-pressure side bus and Transformer Winding are disconnected, thus disconnect contacting of transformer and other primary equipments;
(2) the ground connection of the grounding switch of high voltage side of transformer is opened in flakes, and be connected respectively with three passages of low-voltage impedance tester, for injecting and collecting test signal;
(3) the ground connection of the grounding switch of step down side is opened in flakes, by wire, the three-phase of transformer is carried out short circuit, to realize the short circuit of low-pressure side;
(4) make the grounding switch of transformer medium voltage side be in off-state, to realize medium voltage side open circuit;
(5) keep transformation isolated neutral state;
(6), after connecting in a manner described, realize the low-voltage impedance test function of high pressure to low pressure by low-voltage impedance tester;
The method of the low-voltage impedance to low pressure is pressed to comprise the following steps in described test:
(1) respectively high-voltage side bus, medium voltage side bus, three disconnectores between low-pressure side bus and Transformer Winding are disconnected, thus disconnect contacting of transformer and other primary equipments;
(2) the ground connection of the grounding switch of transformer medium voltage side is opened in flakes, and be connected respectively with three passages of low-voltage impedance tester, for injecting and collecting test signal;
(3) the ground connection of the grounding switch of step down side is opened in flakes, by wire, the three-phase of transformer is carried out short circuit, to realize the short circuit of low-pressure side;
(4) make the grounding switch of transformer medium voltage side be in off-state, to realize medium voltage side open circuit;
(5) keep transformation isolated neutral state;
(6), after connecting in a manner described, in being realized by low-voltage impedance tester, press the low-voltage impedance test function to low pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310182233.3A CN103245834B (en) | 2013-05-16 | 2013-05-16 | Deformation of transformer winding low-voltage impedance on-the-spot test method |
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| CN201310182233.3A CN103245834B (en) | 2013-05-16 | 2013-05-16 | Deformation of transformer winding low-voltage impedance on-the-spot test method |
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| CN103245834B true CN103245834B (en) | 2015-09-02 |
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| CN105046036A (en) * | 2015-09-17 | 2015-11-11 | 国网天津市电力公司 | Magnetic-structural-coupling-field-based transformer winding deformation analysis method |
| CN107817413B (en) * | 2017-10-25 | 2023-10-17 | 国网福建省电力有限公司 | Method for eliminating influence of short-circuit resistance in transformer low-voltage short-circuit impedance test |
| CN111614376A (en) * | 2020-03-05 | 2020-09-01 | 国网青海省电力公司果洛供电公司 | Medium voltage power line impedance test system based on medium voltage carrier communication device |
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| CN1085320A (en) * | 1993-10-07 | 1994-04-13 | 杨大成 | Power frequency test voltage measurer |
| CN101354418B (en) * | 2008-09-22 | 2011-07-13 | 河南省电力公司商丘供电公司 | Power transformer test method without disconnecting wire |
| CN201497789U (en) * | 2009-09-25 | 2010-06-02 | 沈阳变压器研究院股份有限公司 | Device for measuring short-circuit vibration displacement and deformation of transformer type products |
| CN102508087B (en) * | 2011-12-26 | 2014-01-22 | 国家电网公司 | Integrated test stand for transformers |
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