CN103605058A - Device for carrying out partial discharge tests simultaneously on multiple sets of transformers - Google Patents
Device for carrying out partial discharge tests simultaneously on multiple sets of transformers Download PDFInfo
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- CN103605058A CN103605058A CN201310636320.1A CN201310636320A CN103605058A CN 103605058 A CN103605058 A CN 103605058A CN 201310636320 A CN201310636320 A CN 201310636320A CN 103605058 A CN103605058 A CN 103605058A
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Abstract
The invention relates to the field of discharging tests of electrical equipment, in particular to a device for carrying out partial discharge tests simultaneously on multiple sets of transformers. The device comprises a variable frequency power source, an exciting transformer, a capacitive voltage divider, a compensation reactor, a peak voltmeter and a partial discharge detector, wherein the variable frequency power source is connected with a variable frequency power source control box through an optical fiber. The device further comprises at least one transformer to be tested, the input end of the low-voltage side of each transformer to be tested is connected with an inductor and an impedance detecting box in series, the impedance detecting box inputs low-voltage signals to the partial discharging detector which is used for detecting the partial discharging amount of the transformer to be tested, and the high-voltage output end the transformer to be tested inputs high-voltage singles to the partial discharging detector. According to the device for carrying out the partial discharge tests simultaneously on the multiple sets of transformers, an HVFP variable frequency power source is adopted, the number of personnel involved in the tests is reduced, the equipment is simple in operation, high in safety performance, suitable for carrying out the partial discharging tests simultaneously on mass produced transformers of the same model, and thus a large amount of time and electricity quantity can be saved.
Description
Technical field
The present invention relates to electrical equipment discharge test field, relate in particular to and a kind of many transformers are carried out to the device of local discharge test simultaneously.
Background technology
Electrical equipment has shelf depreciation to a certain degree under normal working voltage, this discharge process can develop constantly in the All Time of its normal operation, will speed up the aging of insulant and destroy, while developing into a certain degree, may cause puncturing of whole insulation.Carry out at present method for measurement of partial discharge and be divided into electrical measuring method and non-electrical measuring method.Testing equipment generally adopts frequency-converting power supply and vehicular medium frequency electric generating unit as experiment power supply.The normal vehicular medium frequency electric generating unit that adopts carried out local discharge test in the past, but the method frequency is non-adjustable, and power consumption is large, and equipment set volume is large, the transportation of unsuitable hill path, and on-the-spot test difficulty is large, and other equipment that need to coordinate are many, have inconvenience during use.Because variable-frequency power sources output frequency is adjustable, equipment is simple, easy to operate, is used widely in recent years in local discharge test field.But existing apparatus once can only carry out local discharge test to a transformer, when batch production transformer, efficiency is low, does not catch up with manufacturing schedule.
Summary of the invention
For the problems referred to above, the invention provides and a kind ofly can carry out the device of local discharge test to many transformers simultaneously, meet batch production needs.
The technical solution used in the present invention is: a kind of many transformers are carried out to the device of local discharge test simultaneously, comprise variable-frequency power sources, exciting transformer, capacitive divider, compensation reactor, peak-reading voltmeter and PD meter, variable-frequency power sources connects variable-frequency power sources control box by optical fiber, also comprise at least one tested transformer, variable-frequency power sources output connects exciting transformer low pressure input end, exciting transformer high-voltage output end is connected with each tested step down side, compensation reactor is attempted by all tested step down sides, capacitive divider is comprised of at least two capacitances in series, its high pressure knee-joint exciting transformer high-pressure side, low-voltage arm connects peak-reading voltmeter by concentric cable, each tested step down side input end is all in series with inductance and detects impedance box, detects impedance box and inputs low-voltage signal to PD meter, and for detection of the office of transformer high-volume, tested transformer high-voltage output terminal is inputted high-voltage signal to PD meter.
Variable-frequency power sources, by optical communication interface, utilizes optic fiber converter to be connected to variable-frequency power sources control box, by variable-frequency power sources control box, shows voltage, electric current and the frequency values that variable-frequency power sources applies.Capacitive divider low pressure knee-joint peak-reading voltmeter, the no-load voltage ratio by two electric capacity shows exciting transformer high side voltage, low pressure institute making alive when applying voltage and whether reach office and put for measuring tested step down side.The present invention can carry out local discharge test to many transformers simultaneously, and because electric power loop and measuring circuit are relatively independent, each loop is independent of each other, and there will not be interference phenomenon.For preventing that the office that step down side may occur from putting interference, the present invention suppresses the transmission of high-frequency signal at low-pressure side input end tandem electric inductance.Each tested transformer by the office detecting impedance box joint sleeve end shield and PD meter and detect transformer high-volume.
Preferably, described variable-frequency power sources adopts the HVFP frequency-converting power supply that output frequency is 20-300Hz, and supply frequency can smooth adjustment, can select arbitrarily suitable frequencies according to tested transformer parameter is different.
Preferably, described each tested transformer model is identical, and electric pressure is identical, and transformer capacity is lower than variable-frequency power sources capacity.As long as transformer capacity, lower than variable-frequency power sources capacity, just can be carried out local discharge test simultaneously.
The invention has the advantages that:
1. the present invention adopts HVFP variable-frequency power sources, participates in testing crew and reduces, and equipment operating is simple, and security performance is high.
2. the applicable batch production of the present invention same model transformer carries out partial discharge test simultaneously, can save a large amount of time and electric weight.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention structural representation;
1, variable-frequency power sources, 2, exciting transformer, 3, capacitive divider, 4, compensation reactor, 5, detect impedance box, 6, tested transformer, 7, peak-reading voltmeter, 8, PD meter, 9, variable-frequency power sources control box.
Embodiment
A kind of many transformers are carried out to the device of local discharge test simultaneously, as shown in Figure 1, comprise variable-frequency power sources 1, exciting transformer 2, capacitive divider 3, compensation reactor 4, peak-reading voltmeter 7, PD meter 8 and two tested transformers 6, two tested transformer 6 models are identical, electric pressure is identical, and transformer capacity is lower than variable-frequency power sources capacity.Variable-frequency power sources 1 connects variable-frequency power sources control box 9 by optical fiber, by variable-frequency power sources control box, shows voltage, electric current and the frequency values that variable-frequency power sources applies, and described variable-frequency power sources 1 adopts the HVFP frequency-converting power supply that output frequency is 20-300Hz.Variable-frequency power sources 1 output connects exciting transformer 2 low pressure input ends, exciting transformer 2 high-voltage output ends are connected with two tested transformer 6 low-pressure sides, compensation reactor 4 is attempted by two tested transformer 6 low-pressure sides, capacitive divider 3 is composed in series by two capacitor C 1, C2, its high pressure knee-joint exciting transformer high-pressure side, low-voltage arm connects peak-reading voltmeter 7 by concentric cable.Two tested transformer 6 low-pressure side input ends are all in series with inductance L 1 and detect impedance box 5, detect 5 outputs of impedance box and connect PD meter 8 low pressure ends, to PD meter input low-voltage signal, for detection of transformer office high-volume, tested transformer 6 High voltage output termination PD meter 8 high-pressure sides, to PD meter input high-voltage signal.
Claims (3)
1. one kind is carried out the device of local discharge test to many transformers simultaneously, comprise variable-frequency power sources, exciting transformer, capacitive divider, compensation reactor, peak-reading voltmeter and PD meter, variable-frequency power sources connects variable-frequency power sources control box by optical fiber, it is characterized in that: also comprise at least one tested transformer, variable-frequency power sources output connects exciting transformer low pressure input end, exciting transformer high-voltage output end is connected with each tested step down side, compensation reactor is attempted by all tested step down sides, capacitive divider is comprised of at least two capacitances in series, its high pressure knee-joint exciting transformer high-pressure side, low-voltage arm connects peak-reading voltmeter by concentric cable, each tested step down side input end is all in series with inductance and detects impedance box, detects impedance box and inputs low-voltage signal to PD meter, and for detection of the office of transformer high-volume, tested transformer high-voltage output terminal is inputted high-voltage signal to PD meter.
2. according to claim 1 many transformers are carried out to the device of local discharge test simultaneously, it is characterized in that: described variable-frequency power sources adopts the HVFP frequency-converting power supply that output frequency is 20-300Hz.
3. according to claim 1 many transformers are carried out to the device of local discharge test simultaneously, it is characterized in that: described each tested transformer model is identical, and electric pressure is identical, and transformer capacity is lower than variable-frequency power sources capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310636320.1A CN103605058A (en) | 2013-12-03 | 2013-12-03 | Device for carrying out partial discharge tests simultaneously on multiple sets of transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310636320.1A CN103605058A (en) | 2013-12-03 | 2013-12-03 | Device for carrying out partial discharge tests simultaneously on multiple sets of transformers |
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| CN103605058A true CN103605058A (en) | 2014-02-26 |
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| CN201310636320.1A Pending CN103605058A (en) | 2013-12-03 | 2013-12-03 | Device for carrying out partial discharge tests simultaneously on multiple sets of transformers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316854A (en) * | 2014-11-06 | 2015-01-28 | 国网上海市电力公司 | Variable-frequency resonance testing circuit |
| CN106706988A (en) * | 2017-03-28 | 2017-05-24 | 中国大唐集团科学技术研究院有限公司华中分公司 | Multifunctional coupling capacitor voltage division device for partial discharge test of transformer |
| CN110568332A (en) * | 2019-09-23 | 2019-12-13 | 南方电网科学研究院有限责任公司 | lightning arrester resistor sheet side glaze discharge test system |
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| JPH09152462A (en) * | 1995-11-30 | 1997-06-10 | Toshiba Corp | Partial discharge detection method for transformer |
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| CN103278753A (en) * | 2013-05-02 | 2013-09-04 | 国家电网公司 | Device for induced voltage tests on transformers |
| CN203572921U (en) * | 2013-12-03 | 2014-04-30 | 山东电力设备有限公司 | Partial discharge testing apparatus capable of simultaneously testing multiple transformers |
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2013
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| JPH09152462A (en) * | 1995-11-30 | 1997-06-10 | Toshiba Corp | Partial discharge detection method for transformer |
| CN101900782A (en) * | 2010-07-01 | 2010-12-01 | 思源电气股份有限公司 | Testing system of gas insulated combined electric appliance equipment |
| 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 |
| CN202870240U (en) * | 2012-09-11 | 2013-04-10 | 青海电力科学试验研究院 | A partial discharge testing device of a converter transformer at a high altitude locality |
| CN103267933A (en) * | 2013-05-02 | 2013-08-28 | 国家电网公司 | Method for measuring partial discharge in transformer induced voltage testing device |
| CN103278753A (en) * | 2013-05-02 | 2013-09-04 | 国家电网公司 | Device for induced voltage tests on transformers |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316854A (en) * | 2014-11-06 | 2015-01-28 | 国网上海市电力公司 | Variable-frequency resonance testing circuit |
| CN106706988A (en) * | 2017-03-28 | 2017-05-24 | 中国大唐集团科学技术研究院有限公司华中分公司 | Multifunctional coupling capacitor voltage division device for partial discharge test of transformer |
| CN106706988B (en) * | 2017-03-28 | 2023-10-20 | 中国大唐集团科学技术研究院有限公司华中分公司 | Multifunctional coupling capacitance voltage divider for partial discharge test of transformer |
| CN110568332A (en) * | 2019-09-23 | 2019-12-13 | 南方电网科学研究院有限责任公司 | lightning arrester resistor sheet side glaze discharge test system |
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Application publication date: 20140226 |
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