CN201576074U - Variable frequency resonance tester without partial discharge for ultrahigh voltage transformer - Google Patents
Variable frequency resonance tester without partial discharge for ultrahigh voltage transformer Download PDFInfo
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- CN201576074U CN201576074U CN2009202893320U CN200920289332U CN201576074U CN 201576074 U CN201576074 U CN 201576074U CN 2009202893320 U CN2009202893320 U CN 2009202893320U CN 200920289332 U CN200920289332 U CN 200920289332U CN 201576074 U CN201576074 U CN 201576074U
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- compensation reactor
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- 238000012360 testing method Methods 0.000 claims abstract description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000002474 experimental method Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
Disclosed is a variable frequency resonance tester without partial discharge for an ultrahigh voltage transformer. A variable frequency power supply is accessed to a three-phase alternating current power supply, an output of the variable frequency power supply is connected to a low voltage end of an exciting transformer, a high voltage end of the exciting transformer is connected with a parallel compensation reactor, further, the parallel compensation reactor, a voltage divider and a low voltage end of a test object (namely an ultrahigh voltage transformer) are connected in parallel, a high voltage tail end of the exciting transformer, a tail end of the parallel compensation reactor, and a low voltage tail end, an iron core and a high voltage tail end of the test object are grounded, a low voltage head end and a high voltage head end of the test object and the tail end of the iron core are all connected to impedance testing input ends, impedance testing grounding ends are all grounded, and impedance testing output ends are all connected to a partial discharge tester. The variable frequency resonance tester has the system partial discharge interference smaller than 10pC without limitation of balance measurement and unbalance measurement.
Description
Technical field
The utility model relates to high voltage installation site test technical field, specifically is a kind of no partial discharge frequency conversion resonance experiment device that is applicable to extra-high voltage and following electric pressure transformer.
Background technology
When electric device equipment carries out the Insulation Test of high voltage scene, often use the mode of parallel connection or series resonance to provide test required high voltage.At present when extra-high voltage transformer is made partial discharge test, manufacturing firm, Hubei Electric Power research institute and Shanxi Electric Power Research Institute all adopt generator change excitation to come regulating frequency, in order to satisfy condition of resonance, need numerous reactor arrangement connection in series-parallel, and generator capacity requires than higher, and the equipment tissue is put loaded down with trivial details, the wiring complexity, floor area is big, has increased interference.And in the partial discharge of transformer site test of 500kV and following electric pressure,, generally believing frequency conversion source poor reliability though have frequency conversion source and two kinds of pressuring methods of genset, the less employings of reason such as interference is big, and efficient is low are put in office.Along with development of electronic technology, the frequency conversion source apparatus adopts triode amplification mode in parallel to be easy to realize variable frequency adjustment, and can guarantee its reliability, and under pure resistive load situation, efficient is greatly improved simultaneously.
Summary of the invention
The purpose of this utility model is to overcome the deficiency in the existing on-the-spot extra-high voltage equipment experimental technique, a kind of no partial discharge frequency conversion resonance experiment device that is applicable to extra-high voltage transformer is provided, make its field wiring simple, use reliable, shelf depreciation to disturb little, measure accurately, satisfy the on-the-spot partial discharge test requirement of extra-high voltage.
The technical solution of the utility model is: extra-high voltage transformer no partial discharge frequency conversion resonance experiment device, comprise variable-frequency power sources, exciting transformer, the shunt compensation reactor, voltage divider, test product (being extra-high voltage transformer), iron core, detect the impedance drawn game and put the discharge test instrument, three-phase alternating-current supply inserts variable-frequency power sources, the low pressure end of exciting transformer is received in variable-frequency power sources output, the high pressure termination shunt compensation reactor of exciting transformer, the shunt compensation reactor, voltage divider and the parallel connection of test product low pressure end, exciting transformer high pressure tail end, shunt compensation reactor tail end and test product low pressure tail end, iron core, the equal ground connection of high pressure tail end, test product low pressure head end, high pressure head end and iron core tail end all insert and detect the impedance input end, detect the equal ground connection of impedance earth end, detect the impedance output terminal and all insert instrument for measuring partial discharge.
Compared with prior art, advantage of the present utility model is:
(1) variable-frequency power sources of the utility model employing adopts triode amplification mode in parallel, have special chip produce frequency in 4～1MHz scope, voltage adjustable standard sine wave voltage in 0～350V, effectively reduce the interference of mains side, improved efficient for partial discharge test; Simultaneously, adopt the optical fiber isolation method to control and measure, effectively guarantee when test specimen puncture or other faults the device steady operation.The frequency conversion mode reliability that has generally believed before having overcome is not high, efficient is low, disturb big shortcoming.
(2) the utility model shunt compensation reactor adopts air reactor, and volume is little, has reduced floor area, and two ends have the isostatic pressing orchid about it, and reactance value is a fixed value.
(3) the utility model is that a kind of volume is little at defective, the especially deficiency of extra-high voltage electric power device context test method of existing on-the-spot Insulation Test scheme, in light weight, the efficient height, wiring is simple, the reliability height, external interference is little, practicability frequency conversion resonance experiment device simple to operate.Can satisfy the local discharge test requirement of all high-voltage power equipment such as power transformer, cable, sleeve pipe, GIS, mutual inductor, and not be subjected to the restriction of balancing a survey method, disequilibrium survey method, interference is put less than 10pC in device office.Have high use value and economic worth.
Description of drawings
Fig. 1 is the utility model structural representation
Example structure synoptic diagram when Fig. 2 is the direct current extra-high voltage transformer for test product in the utility model device.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1, description of symbols in 2: 1-variable-frequency power sources, 1.1-transformer net side head end, 1.2-transformer net side tail end, the 2-exciting transformer, 2.1-transformer valve side head end, 2.2-transformer valve side tail end, 3-shunt compensation reactor, 4 voltage dividers, the 5-test product, 6-detects impedance, and the discharge test instrument is put in 7-office.
As described in Figure 1, a kind of no partial discharge frequency conversion resonance experiment device that is applicable to extra-high voltage and following electric pressure transformer comprises variable-frequency power sources 1, exciting transformer 2, shunt compensation reactor 3, voltage divider 4, test product 5, detects impedance 6 drawn games and put discharge test instrument 7.Its annexation is: three-phase alternating-current supply inserts variable-frequency power sources 1, the low pressure end of exciting transformer 2 is received in variable-frequency power sources 1 output, the high pressure termination shunt compensation reactor 3 of exciting transformer 2, shunt compensation reactor 3, voltage divider 4 and test product 5 low pressure end parallel connections, exciting transformer 2 high pressure tail ends, shunt compensation reactor 3 tail ends and test product 5 low pressure tail ends, iron core, the equal ground connection of high pressure tail end, test product 5 low pressure head ends, high pressure head end and iron core tail end all connect and detect impedance 6 input ends, detect the equal ground connection of impedance 6 earth terminals, detect impedance 6 output terminals and all insert instrument for measuring partial discharge 7.
Fig. 2 further specifies its principle of work in conjunction with the embodiments.Three-phase 380V AC power through the 630A air switch is sent into variable-frequency power sources 1, variable-frequency power sources 1 has special chip to produce frequency in 4～1MHz scope, voltage adjustable standard sine wave voltage in 0～350V is sent into exciting transformer 2, the no-load voltage ratio of exciting transformer 2 is selected 380V/180kV for use, output voltage is added to shunt compensation reactor 3 and the test product 5 valve side two ends of two joint 6.5H, by optical fiber communication control of conversion power supply, under less output voltage, regulating frequency makes resonant tank be in the parallel resonance state, the output of adjustment voltage, monitor high-voltage value by voltage divider 4, test product 5 valve sides are reached specify test examination voltage, test product 5 net sides to reach test examination voltage 1.1U simultaneously
m(113.0kV), 1.3U
m(133.6kV) and 1.5U
m(154.2kV); Direct measurement through detection impedance 6 that connects on valve side, net side, the iron core folder and the Partial discharge detector that is attached thereto 7 realization shelf depreciations, the discharge test instrument was put in the office of sending into after office's discharge signal amplified signal through the effect that detects impedance, and instrument for measuring partial discharge directly measures after inside is with signal process digital filtering.
The utility model test unit volume is little, and is in light weight, the efficient height, and wiring is simple, the reliability height, external interference is little, and is simple to operate, is a kind of frequency conversion resonance experiment device of practicability, and work brings great convenience to site test.This area any technician all can realize the utility model.
Claims (1)
1. extra-high voltage transformer no partial discharge frequency conversion resonance experiment device, comprise variable-frequency power sources, exciting transformer, the shunt compensation reactor, voltage divider, test product, iron core, detect the impedance drawn game and put the discharge test instrument, it is characterized in that: three-phase alternating-current supply inserts variable-frequency power sources, the low pressure end of exciting transformer is received in variable-frequency power sources output, the high pressure termination shunt compensation reactor of exciting transformer, the shunt compensation reactor, voltage divider and the parallel connection of test product low pressure end, exciting transformer high pressure tail end, shunt compensation reactor tail end and test product low pressure tail end, iron core, the equal ground connection of high pressure tail end, test product low pressure head end, high pressure head end and iron core tail end all insert and detect the impedance input end, detect the equal ground connection of impedance earth end, detect the impedance output terminal and all insert instrument for measuring partial discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202893320U CN201576074U (en) | 2009-12-18 | 2009-12-18 | Variable frequency resonance tester without partial discharge for ultrahigh voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202893320U CN201576074U (en) | 2009-12-18 | 2009-12-18 | Variable frequency resonance tester without partial discharge for ultrahigh voltage transformer |
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| Publication Number | Publication Date |
|---|---|
| CN201576074U true CN201576074U (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202893320U Expired - Fee Related CN201576074U (en) | 2009-12-18 | 2009-12-18 | Variable frequency resonance tester without partial discharge for ultrahigh voltage transformer |
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| CN (1) | CN201576074U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269786A (en) * | 2011-05-09 | 2011-12-07 | 辽宁省电力有限公司抚顺供电公司 | Load testing device for triple-frequency transformer |
| CN102288880A (en) * | 2011-05-12 | 2011-12-21 | 辽宁省电力有限公司沈阳供电公司 | Frequency-changing resonant withstand voltage testing device |
| CN102944776A (en) * | 2012-10-30 | 2013-02-27 | 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 |
| CN103389442A (en) * | 2012-05-07 | 2013-11-13 | 四川聚友生态农业科技有限公司 | Transformer substation electrical device alternating current withstand voltage resonance testing device |
| CN103913685A (en) * | 2014-04-15 | 2014-07-09 | 国家电网公司 | Cable partial discharge detection system based on frequency conversion resonance voltage resistance |
| CN107783019A (en) * | 2017-11-21 | 2018-03-09 | 广东电网有限责任公司电力科学研究院 | Induced voltage test device when a kind of three-phase transformer is long |
| CN113064026A (en) * | 2021-03-01 | 2021-07-02 | 国网甘肃省电力公司电力科学研究院 | Ultra-high voltage super-large capacity transformer long-time induction voltage test device |
-
2009
- 2009-12-18 CN CN2009202893320U patent/CN201576074U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269786A (en) * | 2011-05-09 | 2011-12-07 | 辽宁省电力有限公司抚顺供电公司 | Load testing device for triple-frequency transformer |
| CN102269786B (en) * | 2011-05-09 | 2014-02-19 | 辽宁省电力有限公司抚顺供电公司 | Load testing device for triple-frequency transformer |
| CN102288880A (en) * | 2011-05-12 | 2011-12-21 | 辽宁省电力有限公司沈阳供电公司 | Frequency-changing resonant withstand voltage testing device |
| CN103389442A (en) * | 2012-05-07 | 2013-11-13 | 四川聚友生态农业科技有限公司 | Transformer substation electrical device alternating current withstand voltage resonance testing device |
| CN102944776A (en) * | 2012-10-30 | 2013-02-27 | 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 |
| CN103913685A (en) * | 2014-04-15 | 2014-07-09 | 国家电网公司 | Cable partial discharge detection system based on frequency conversion resonance voltage resistance |
| CN107783019A (en) * | 2017-11-21 | 2018-03-09 | 广东电网有限责任公司电力科学研究院 | Induced voltage test device when a kind of three-phase transformer is long |
| CN113064026A (en) * | 2021-03-01 | 2021-07-02 | 国网甘肃省电力公司电力科学研究院 | Ultra-high voltage super-large capacity transformer long-time induction voltage test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANXI ELECTRIC POWER CORPORATION STATE ELECTRIC N Effective date: 20130626 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Nie Dexin Inventor after: Wu Zhirong Inventor after: Shi Yanhui Inventor after: Wu Gang Inventor after: Wu Yihua Inventor after: Zhang Jiankun Inventor after: Liang Jianwei Inventor after: Mu Guangqi Inventor before: Nie Dexin Inventor before: Wu Zhirong Inventor before: Shi Yanhui Inventor before: Wu Gang Inventor before: Wu Yihua |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: NIE DEXIN WU ZHIRONG SHI YANHUI WU GANG WU YIHUA TO: NIE DEXIN WU ZHIRONG SHI YANHUI WU GANG WU YIHUA ZHANG JIANKUN LIANG JIANWEI MU GUANGQI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130626 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee after: Shanxi Electric Power Comany Patentee after: State Grid Corporation of China Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute |
|
| 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: 20100908 Termination date: 20171218 |