CN209992610U - Testing arrangement is put in mutual-inductor office - Google Patents
Testing arrangement is put in mutual-inductor office Download PDFInfo
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- CN209992610U CN209992610U CN201920595891.8U CN201920595891U CN209992610U CN 209992610 U CN209992610 U CN 209992610U CN 201920595891 U CN201920595891 U CN 201920595891U CN 209992610 U CN209992610 U CN 209992610U
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- partial discharge
- power supply
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- 238000001914 filtration Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model discloses a testing arrangement is put in mutual-inductor office belongs to high-tension apparatus and detects technical field, put variable frequency power supply, exciting transformer, compensation reactor L1, compensation reactor L2, reactor L3, reactor L4, capacitive voltage divider, surveyed mutual-inductor T2, office and put appearance test impedance and office and put the appearance including no office, solved the mutual-inductor office and put the power supply interference's when testing technical problem, the utility model discloses a no office puts variable frequency power supply as the power supply, adopts no office to put the compensation reactor as the filtering device, very big reduction the power supply interference problem, ensured the mutual-inductor office and put experimental accuracy.
Description
Technical Field
The utility model belongs to the technical field of high-voltage equipment detects, in particular to testing arrangement is put in mutual-inductor office.
Background
The partial discharge level is an important performance index of the high-voltage transformer, the partial discharge amount is too high, the service life of motor equipment can be endangered, and safety is strange, so that the partial discharge amount of the transformer must be monitored in real time.
The current transformer can be interfered by various ways in a partial discharge test, the interference can not only reduce the detection result of the partial discharge test, but also cause the test failure, and the problem that how to effectively reduce the influence of the interference on the partial discharge test and how to reduce the influence of the power supply interference on the test must be solved is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a testing arrangement is put in mutual-inductor office has solved the mutual-inductor office and has put the technical problem of the power supply interference when testing.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a mutual inductor partial discharge testing device comprises a non-partial discharge variable frequency power supply, an excitation transformer, a compensation reactor L1, a compensation reactor L2, a reactor L3 and a reactor L4, the device comprises a capacitive voltage divider, a tested mutual inductor T2 and a partial discharge instrument for testing impedance and partial discharge, wherein the input end of a non-partial discharge variable frequency power supply is connected with 380V three-phase power, the output end of the non-partial discharge variable frequency power supply is connected with a pin 1 and a pin 2 of an exciting transformer, a pin 3 and a pin 4 of the exciting transformer are respectively connected with the low-voltage side input end of the tested mutual inductor T2 through a reactor L3 and a reactor L4, the pin 3 of the exciting transformer is also connected with a ground wire through a compensation reactor L1, the pin 4 of the exciting transformer is connected with the ground wire through a compensation reactor L2, the pin 3 of the exciting transformer is also connected with the ground wire through the capacitive voltage divider, one end of a high-voltage side coil of the tested mutual inductor T.
Preferably, the partial discharge-free variable frequency power supply is further provided with a variable frequency power supply control box for adjusting output voltage.
Preferably, the model of the partial discharge-free variable frequency power supply is PY 3520-150; the type of the exciting transformer is LCB3520-150 of a non-partial discharge exciting transformer; the reactor L3, the reactor L4, the compensation reactor L1 and the compensation reactor L2 are all BDK3520-210/35 in type; the type of the capacitive voltage divider is an ungrounded alternating current voltage divider FYQ 3520-100/0.5; the model of the partial discharge instrument is JFY 3520-M.
A mutual-inductor office puts testing arrangement, solved the mutual-inductor office and put the technical problem of power supply interference when testing, the utility model discloses a no office puts variable frequency power source as the power supply, adopts no office to put compensating reactor as the filtering device, very big reduction the power supply interference problem, ensured the mutual-inductor office and put experimental accuracy.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The transformer partial discharge testing device shown in fig. 1 comprises a non-partial discharge variable frequency power supply, an exciting transformer, a compensation reactor L1, a compensation reactor L2, a reactor L3 and a reactor L4, the device comprises a capacitive voltage divider, a tested mutual inductor T2 and a partial discharge instrument for testing impedance and partial discharge, wherein the input end of a non-partial discharge variable frequency power supply is connected with 380V three-phase power, the output end of the non-partial discharge variable frequency power supply is connected with a pin 1 and a pin 2 of an exciting transformer, a pin 3 and a pin 4 of the exciting transformer are respectively connected with the low-voltage side input end of the tested mutual inductor T2 through a reactor L3 and a reactor L4, the pin 3 of the exciting transformer is also connected with a ground wire through a compensation reactor L1, the pin 4 of the exciting transformer is connected with the ground wire through a compensation reactor L2, the pin 3 of the exciting transformer is also connected with the ground wire through the capacitive voltage divider, one end of a high-voltage side coil of the tested mutual inductor T.
The partial discharge-free variable frequency power supply adopted by the embodiment can provide 150KW power, has the output frequency of 30-300Hz, and is suitable for partial discharge tests of voltage or current transformers below 220 KV.
The compensation reactor L1 and the compensation reactor L2 are used for compensating the capacitive current of the mutual inductor.
The utility model discloses a reactor L3 and reactor L4 carry out filtering, restrict the higher harmonic in the electric wire netting, very big improvement the experimental degree of accuracy of putting.
The partial discharge-free variable frequency power supply provides a voltage value for testing for the primary side of the exciting transformer, after the secondary side of the exciting transformer transforms, the transformed voltage value is loaded on the low-voltage side of the tested transformer, and the two compensation inductors L1 and L2 respectively filter the two ends of the secondary side coil of the exciting transformer, so that the voltage loaded on the low-voltage side of the tested transformer T2 is ensured to be pure, and the purity of sampling voltage on detection impedance of the partial discharge instrument is ensured.
The detection impedance of the partial discharge instrument is a matched element of the partial discharge instrument.
The capacitive voltage divider is formed by two capacitors C1 and C2 connected in series.
Preferably, the partial discharge-free variable frequency power supply is further provided with a variable frequency power supply control box for adjusting output voltage.
Preferably, the model of the partial discharge-free variable frequency power supply is PY 3520-150; the type of the exciting transformer is LCB3520-150 of a non-partial discharge exciting transformer; the reactor L3, the reactor L4, the compensation reactor L1 and the compensation reactor L2 are all BDK3520-210/35 in type; the type of the capacitive voltage divider is an ungrounded alternating current voltage divider FYQ 3520-100/0.5; the model of the partial discharge instrument is JFY 3520-M.
The partial discharge-free variable frequency power supply adopted by the embodiment is also provided with a variable frequency power supply control box, and a user can manually control the output voltage of the partial discharge-free variable frequency power supply through controlling the variable frequency power supply control box, so that the partial discharge test is convenient.
A mutual-inductor office puts testing arrangement, solved the mutual-inductor office and put the technical problem of power supply interference when testing, the utility model discloses a no office puts variable frequency power source as the power supply, adopts no office to put compensating reactor as the filtering device, very big reduction the power supply interference problem, ensured the mutual-inductor office and put experimental accuracy.
Claims (3)
1. The utility model provides a testing arrangement is put in mutual-inductor office which characterized in that: the device comprises a non-partial discharge variable frequency power supply, an exciting transformer, a compensating reactor L1, a compensating reactor L2, a reactor L3, a reactor L4, a capacitive voltage divider, a tested transformer T2 and a partial discharge instrument test impedance and partial discharge instrument, wherein the input end of the non-partial discharge variable frequency power supply is connected with 380V three-phase power, the output end of the non-partial discharge variable frequency power supply is connected with 1 pin and 2 pin of the exciting transformer, 3 pin and 4 pin of the exciting transformer are respectively connected with the low-voltage side input end of the tested transformer T2 through a reactor L3 and a reactor L4, 3 pin of the exciting transformer is connected with a ground wire through a compensating reactor L1, 4 pin is connected with a ground wire through a compensating reactor L2, 3 pin of the exciting transformer is connected with the ground wire through a capacitive voltage divider, one end of a high-voltage side coil of the tested transformer T2 is connected with the partial discharge.
2. The transformer partial discharge testing device according to claim 1, wherein: the partial discharge-free variable frequency power supply is also provided with a variable frequency power supply control box for adjusting output voltage.
3. The transformer partial discharge testing device according to claim 1, wherein: the model of the partial discharge-free variable frequency power supply is PY 3520-150; the type of the exciting transformer is LCB3520-150 of a non-partial discharge exciting transformer; the reactor L3, the reactor L4, the compensation reactor L1 and the compensation reactor L2 are all BDK3520-210/35 in type; the type of the capacitive voltage divider is an ungrounded alternating current voltage divider FYQ 3520-100/0.5; the model of the partial discharge instrument is JFY 3520-M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920595891.8U CN209992610U (en) | 2019-04-28 | 2019-04-28 | Testing arrangement is put in mutual-inductor office |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920595891.8U CN209992610U (en) | 2019-04-28 | 2019-04-28 | Testing arrangement is put in mutual-inductor office |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209992610U true CN209992610U (en) | 2020-01-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920595891.8U Expired - Fee Related CN209992610U (en) | 2019-04-28 | 2019-04-28 | Testing arrangement is put in mutual-inductor office |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209992610U (en) |
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2019
- 2019-04-28 CN CN201920595891.8U patent/CN209992610U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20200124 |