CN101034125B - Resonant experimental device of dry-type power transformer partial discharge detection - Google Patents
Resonant experimental device of dry-type power transformer partial discharge detection Download PDFInfo
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- CN101034125B CN101034125B CN200710036448A CN200710036448A CN101034125B CN 101034125 B CN101034125 B CN 101034125B CN 200710036448 A CN200710036448 A CN 200710036448A CN 200710036448 A CN200710036448 A CN 200710036448A CN 101034125 B CN101034125 B CN 101034125B
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Abstract
This invention relates to harmonic vibration test facilities of partial discharge detection of dry-type transformer. This invention includes three-phase power source of 380V 50Hz, frequency conversion power source, intermedial transformer, high voltage filter, high voltage measure equipment, compensator, sampling device of partial discharge signal, measure equipment of partial discharge. Compared with existing technique, this invention has enough experiment capacity. And the invention is easy to carry.
Description
Technical field
The present invention relates to the detection test unit of power equipment, relate in particular to the resonant experimental device that a kind of dry-type power transformer partial discharge detects.
Background technology
The dry-type power transformer of solid insulation has advantages such as compact conformation, no greasy dirt, favourable fire prevention, thereby has generally been adopted in 35kV and following customer substation.But the often easier technological local defect of hiding of solid cast-type insulation, as pore and contaminant particles etc., the shelf depreciation of these weak links may cause perfoliate dielectric breakdown and damage equipment produces fatal harm.
The shelf depreciation test is effective detection means of insulation local defect.Therefore, to solid insulation mutual inductor of 35KV etc., partial discharge test is already as the gainer in the site test.Yet the solid insulation power transformer then because of considering the restriction of test condition, is not carried out the site test of shelf depreciation in the past, thereby can not detect the local defect situation of judging insulation fully and effectively, be unfavorable in time finding and removing a hidden danger.For this reason, classify gainer as about the professional person proposes the on-the-spot partial discharge test of a dry-type power transformer, many equipment owners also require to carry out this test, to improve the reliability of equipment operation.Obviously, the on-the-spot partial discharge test of carrying out dry-type power transformer has huge market potential and wide prospect.
Dry-type power transformer is carried out the suffered restriction condition of shelf depreciation site test to be mainly: the dry-type power transformer that capacity is bigger, need to be equipped with the test unit and the power supply of larger capacity, and the transformer arrangement of many subscriber stations is at floor or subterranean layer, and test unit can only be used manpower transport's mode.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of in order to overcome the defective that above-mentioned prior art exists and have enough test capacity, be convenient to the resonant experimental device that the dry-type power transformer partial discharge of carrying flexibly detects.
Purpose of the present invention can be achieved through the following technical solutions: the resonant experimental device that dry-type power transformer partial discharge detects, it is characterized in that, comprise that three-phase 380V 50Hz power supply, variable-frequency power sources, intermediate transformer, hv filtering device, high-tension measurement instrument, compensator, office's discharge signal sampler, office put tester;
Described three-phase 380V 50Hz power supply input variable-frequency power sources, this variable-frequency power sources becomes the frequency conversion three-phase supply;
The three-phase supply input intermediate transformer of described variable-frequency power sources output;
Described hv filtering device is connected between the input end of the output terminal of intermediate transformer and tested transformer;
Described high-tension measurement instrument is connected between the output terminal of the input end of tested transformer and frequency conversion three-phase supply;
Described compensator is connected in the input end of tested transformer;
The input end of described office discharge signal sampler is connected in the output terminal of tested transformer, and its output terminal is put the input end of tester by the concentric cable office of being connected to;
Described office puts tester and is connected with the frequency conversion three-phase supply.
In the technique scheme, described frequency conversion three-phase supply is to be input to three single-phase variable-frequency power sourcess by three-phase 380V 50Hz power supply, produces phase differential and be three single phase poaer supplies of 120 °, obtains after being connected into star.
Described intermediate transformer does not have office by three single-phase double windings to be put transformer and forms, and the high-pressure side is connected into star, and low-pressure side is connected into triangle.
Described office discharge signal sampler becomes pulse voltage to the inner partial discharge pulse's current conversion that takes place of tested transformer.
After described office discharge signal sampler was put tester by concentric cable with the pulse voltage office of being input to, the partial discharge quantity that tester shows tested transformer was put in office.
Compared with prior art, the present invention has following characteristics:
1) adopt variable-frequency power sources three-phase pressurization that three-phase transformer is carried out Partial Discharge Detection.
2) adopt portable small-sized variable-frequency power sources to the on-the-spot Partial Discharge Detection of transformer.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1; the resonant experimental device that a kind of dry-type power transformer partial discharge detects; utilize three single-phase frequency changing power devices of three-phase 380V 50Hz power supply input; making it produce phase differential is three single phase poaer supplies of 120 °; be connected into star; obtain the frequency conversion three-phase supply, this supply unit has functions such as frequency modulation, pressure regulation, demonstration and protection.
The three-phase supply input intermediate transformer of converter plant output, intermediate transformer do not have office by three single-phase double windings to be put transformer and forms, and the high-pressure side is connected into star, and low-pressure side is connected into triangle, to improve output voltage waveforms.
The hv filtering device that inserts between intermediate transformer and the tested transformer is imported tested transformer to suppress disturbing pulse, improves and measures correctness.
The high-tension measurement instrument is used for measuring partial discharge test voltage.
Compensator is used for compensating the idle component of tested transformer, can reduce the capacity of experiment power supply and intermediate transformer.
The high-pressure side of tested transformer is connected to the local discharge signal sampler, the inner partial discharge pulse's current conversion that takes place of tested transformer is become pulse voltage, be transferred to instrument for measuring partial discharge by concentric cable, the technological means that cooperates the tester can demonstrate the partial discharge quantity (apparent discharge capacity) of tested transformer from PD meter.
Claims (4)
1. the resonant experimental device of dry-type power transformer partial portion discharge examination, it is characterized in that, comprise three-phase 380V 50Hz power supply, variable-frequency power sources, intermediate transformer, hv filtering device, high-tension measurement instrument, compensator, local discharge signal sampler, instrument for measuring partial discharge;
Described three-phase 380V 50Hz power supply input variable-frequency power sources, this variable-frequency power sources becomes the frequency conversion three-phase supply;
The three-phase supply input intermediate transformer of described variable-frequency power sources output;
Described hv filtering device is connected between the input end of the output terminal of intermediate transformer and tested transformer;
Described high-tension measurement instrument is connected between the output terminal of the input end of tested transformer and frequency conversion three-phase supply;
Described compensator is connected in the input end of tested transformer;
The input end of described local discharge signal sampler is connected in the output terminal of tested transformer, and its output terminal is connected to the input end of instrument for measuring partial discharge by concentric cable;
Described instrument for measuring partial discharge is connected with the output terminal of frequency conversion three-phase supply, and described local discharge signal sampler becomes the inner partial discharge pulse's current conversion that takes place of tested transformer pulse voltage to output to instrument for measuring partial discharge again.
2. the resonant experimental device of dry-type power transformer partial according to claim 1 portion discharge examination, it is characterized in that, described frequency conversion three-phase supply is to be input to three single-phase variable-frequency power sourcess by three-phase 380V 50Hz power supply, produce phase differential and be three single phase poaer supplies of 120 °, obtain after being connected into star.
3. the resonant experimental device of dry-type power transformer partial according to claim 1 portion discharge examination is characterized in that described intermediate transformer does not have the shelf depreciation transformer by three single-phase double windings to be formed, and the high-pressure side is connected into star, and low-pressure side is connected into triangle.
4. the resonant experimental device of dry-type power transformer partial according to claim 1 portion discharge examination, it is characterized in that, after described local discharge signal sampler was input to instrument for measuring partial discharge by concentric cable with pulse voltage, instrument for measuring partial discharge showed the partial discharge quantity of tested transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710036448A CN101034125B (en) | 2007-01-12 | 2007-01-12 | Resonant experimental device of dry-type power transformer partial discharge detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710036448A CN101034125B (en) | 2007-01-12 | 2007-01-12 | Resonant experimental device of dry-type power transformer partial discharge detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101034125A CN101034125A (en) | 2007-09-12 |
| CN101034125B true CN101034125B (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710036448A Expired - Fee Related CN101034125B (en) | 2007-01-12 | 2007-01-12 | Resonant experimental device of dry-type power transformer partial discharge detection |
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| CN (1) | CN101034125B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009023713B4 (en) * | 2009-06-03 | 2014-06-05 | Maschinenfabrik Reinhausen Gmbh | Device for testing high voltage equipment |
| CN102142779A (en) * | 2011-03-15 | 2011-08-03 | 荣信电力电子股份有限公司 | Novel transformer test power supply |
| CN102944776B (en) * | 2012-10-30 | 2013-12-25 | 苏州华电电气股份有限公司 | Moving test system for characteristics of transformer based on single-phase high-voltage variable-frequency power source parallel operation |
| CN108037430A (en) * | 2017-11-16 | 2018-05-15 | 云南电网有限责任公司电力科学研究院 | A kind of 10kV distribution transformers three-phase partial discharge test system |
| CN108375750B (en) * | 2018-03-08 | 2021-06-04 | 云南电网有限责任公司电力科学研究院 | Induction withstand voltage and partial discharge test device and method for electromagnetic voltage transformer |
| CN112924830A (en) * | 2021-03-04 | 2021-06-08 | 国网山西省电力公司电力科学研究院 | Transformer three-phase partial discharge simultaneous pressurization test device and test method based on single-phase variable frequency power supply |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6633168B2 (en) * | 2001-03-30 | 2003-10-14 | Square D Company | Method and apparatus for detecting partial discharge in a voltage transformer |
| CN1205482C (en) * | 1999-09-02 | 2005-06-08 | 特兰斯格里德公司 | System for monitoring partial discharge of transformers |
-
2007
- 2007-01-12 CN CN200710036448A patent/CN101034125B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205482C (en) * | 1999-09-02 | 2005-06-08 | 特兰斯格里德公司 | System for monitoring partial discharge of transformers |
| US6633168B2 (en) * | 2001-03-30 | 2003-10-14 | Square D Company | Method and apparatus for detecting partial discharge in a voltage transformer |
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| CN101034125A (en) | 2007-09-12 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Owner name: SHANGHAI JIULONG ELECTRIC POWER (GROUP) CO., LTD. |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200040 NO. 387, KANGDING ROAD, SHANGHAI TO: 200070 ROOM 407, NO. 3, LANE 1394, ZHONGXING ROAD, SHANGHAI |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110602 Address after: 407 No. 200070, Lane 1394, Zhongxing Road, Shanghai, room 3 Co-patentee after: Shanghai Jiulong Electric Power (Group) Co., Ltd. Patentee after: Shanghai Jiulong electric equipment experiment Co., Ltd. Address before: 200040 No. 387, Kangding Road, Shanghai Patentee before: Shanghai Jiulong electric equipment experiment Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20200112 |