CN203572921U - Partial discharge testing apparatus capable of simultaneously testing multiple transformers - Google Patents
Partial discharge testing apparatus capable of simultaneously testing multiple transformers Download PDFInfo
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- CN203572921U CN203572921U CN201320783310.6U CN201320783310U CN203572921U CN 203572921 U CN203572921 U CN 203572921U CN 201320783310 U CN201320783310 U CN 201320783310U CN 203572921 U CN203572921 U CN 203572921U
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Abstract
The utility model relates to the field of discharge test on electrical equipment, and particularly to a partial discharge testing apparatus capable of simultaneously testing multiple transformers. The apparatus includes a frequency conversion power supply, an excitation transformer, a capacitive voltage divider, a compensation reactor, a peak voltmeter and a partial discharge instrument, wherein the frequency conversion power supply is connected with a frequency conversion power supply control box through optical fibers; and the apparatus includes at least one tested transformer, an inductor and a detection impedance box are in series with a low voltage input terminal of each of the tested transformers, the detection impedance box inputs a low voltage signal to the partial discharge instrument and used for detecting the quantity of partial discharge of each of the tested transformers, a high voltage output terminal of each of the tested transformers inputs a high voltage signal to the partial discharge instrument. According to the partial discharge testing apparatus capable of simultaneously testing the multiple transformers, an HVFP frequency conversion power supply is adopted, needed testers can be reduced, and the apparatus is easy to operate and high in safety, and suitable for simultaneously carrying out partial discharge tests on volume-production transformers of the same model, and a lot of time and electricity are saved.
Description
Technical field
The utility model relates to electrical equipment discharge test field, relates in particular to a kind of device that many transformers is carried out simultaneously to local discharge test.
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 work, 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 utility model provides a kind of device that can simultaneously carry out to many transformers local discharge test, meets batch production needs.
The technical solution adopted in the utility model is: a kind of device that many transformers is carried out simultaneously to local discharge test, 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, shows exciting transformer high side voltage by the no-load voltage ratio of two electric capacity, for measuring tested step down side, applies voltage and whether reaches office's low pressure institute making alive while putting.The utility model 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 utility model 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 utility model has the advantage of:
1. the utility model 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 utility model 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 the utility model embodiment 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 device that many transformers is carried out simultaneously to local discharge test, 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 it is the HVFP frequency-converting power supply of 20-300Hz that described variable-frequency power sources 1 adopts output frequency.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 simultaneously to many transformers, 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. the device that many transformers is carried out simultaneously to local discharge test according to claim 1, is characterized in that: described variable-frequency power sources adopts the HVFP frequency-converting power supply that output frequency is 20-300Hz.
3. the device that many transformers is carried out simultaneously to local discharge test according to claim 1, 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 |
|---|---|---|---|
| CN201320783310.6U CN203572921U (en) | 2013-12-03 | 2013-12-03 | Partial discharge testing apparatus capable of simultaneously testing multiple transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320783310.6U CN203572921U (en) | 2013-12-03 | 2013-12-03 | Partial discharge testing apparatus capable of simultaneously testing multiple transformers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203572921U true CN203572921U (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320783310.6U Expired - Fee Related CN203572921U (en) | 2013-12-03 | 2013-12-03 | Partial discharge testing apparatus capable of simultaneously testing multiple transformers |
Country Status (1)
| Country | Link |
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| CN (1) | CN203572921U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605058A (en) * | 2013-12-03 | 2014-02-26 | 山东电力设备有限公司 | Device for carrying out partial discharge tests simultaneously on multiple sets of transformers |
-
2013
- 2013-12-03 CN CN201320783310.6U patent/CN203572921U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605058A (en) * | 2013-12-03 | 2014-02-26 | 山东电力设备有限公司 | Device for carrying out partial discharge tests simultaneously on multiple sets of transformers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20181203 |
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| CF01 | Termination of patent right due to non-payment of annual fee |