CN202159087U - Capacitive voltage dividing impedance measuring system in partial discharge test - Google Patents
Capacitive voltage dividing impedance measuring system in partial discharge test Download PDFInfo
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- CN202159087U CN202159087U CN2011202640108U CN201120264010U CN202159087U CN 202159087 U CN202159087 U CN 202159087U CN 2011202640108 U CN2011202640108 U CN 2011202640108U CN 201120264010 U CN201120264010 U CN 201120264010U CN 202159087 U CN202159087 U CN 202159087U
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- partial discharge
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- voltage dividing
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- 239000003990 capacitor Substances 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 claims description 20
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
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Abstract
The utility model provides a capacitive voltage dividing impedance measuring system in a partial discharge test. A standard voltage dividing capacitor is connected in a conventional impedance measuring loop in series so as to form a capacitive voltage dividing structure, and while a partial discharge signal is transmitted, a voltage signal of equipment is obtained for measuring voltage. The capacitive voltage dividing impedance measuring system in the partial discharge test is simple and reasonable in structure, is remarkable in effect and is beneficial to popularization and application.
Description
Technical field
The utility model relates to a kind of partial discharge test and measures impedance, relates in particular to a kind of partial discharge test that has the capacitance partial pressure function and measures impedance, belongs to electric system High-Voltage Experimentation Technology field.
Background technology
When high voltage electric equipment carried out partial discharge test, it was higher to apply voltage magnitude, caused applying overtension if do not measure accurately, will cause unnecessary damage to equipment.In the site test, owing to hold the influence that rises, the high tension voltage value that obtains indirectly through low voltage voltage calculating is inaccurate.Therefore, for the amplitude of accurate measuring voltage, the on-the-spot capacitive divider that often adopts is directly measured the equipment high-pressure side.Along with the lifting of equipment electric pressure, capacitive divider is more and more heavier, and on-the-spot installation is wasted time and energy, and is unfavorable for carrying out very much of site test.
Summary of the invention
Goal of the invention: the utility model provides a kind of partial discharge test capacitance-voltage-distributing type to measure impedance; Its objective is that the on-the-spot installation of solution capacitive divider in the past wastes time and energy and be unfavorable for very much the problem of site test; The utility model is at the scene in the local discharge of electrical equipment test; Do not adopt under the situation of capacitive divider, conveniently accurately the high tension voltage of equipment is measured, make things convenient for carrying out of site test.
Technical scheme: the utility model is realized through following technical scheme:
A kind of partial discharge test capacitance-voltage-distributing type is measured impedance, it is characterized in that: said partial discharge test is measured impedance and is comprised voltage measurement terminal, input terminal and sensor; The voltage measurement terminal is connected serially to input terminal through low-pass filter, and input terminal passes through standard dividing potential drop capacitances in series to sensor.
Said low-pass filter is made up of standard capacitor divider and inductance; Inductance is connected between voltage measurement terminal and the input terminal, standard capacitor divider be connected serially to inductance after the voltage measurement terminal is parallelly connected.
Advantage and effect: the utility model is in the measurement impedance loop of routine, and the standard voltage-dividing capacitor of connecting divides laminated structure thereby constitute, and in transmission office discharge signal, can also obtain the voltage signal of equipment.This voltage signal gets into measurement mechanism and obtains the equipment high tension voltage through after the low-pass filter filtering higher hamonic wave.
The utility model makes and not using capacitive divider, not increasing under the prerequisite of miscellaneous equipment, can directly measure the high side voltage of tested device in the on-the-spot partial discharge test, thereby obtains the accurate voltage of tested device.
Description of drawings:
Fig. 1 is the structural representation of the utility model.
Embodiment:Below in conjunction with accompanying drawing the present invention is done further explanation:
The structural representation of the utility model as shown in Figure 1, mark 1 is the voltage measurement terminal, the 2nd, standard capacitor divider; The 3rd, inductance, the 4th, input terminal, the 5th, standard dividing potential drop electric capacity; The 6th, measurement terminal; The 7th, parallel resistance, the 8th, sensor, the 9th, the low-pass filter of forming by capacitive divider and inductance.
A kind of partial discharge test capacitance-voltage-distributing type is measured impedance, and said partial discharge test is measured impedance and comprised voltage measurement terminal 1, input terminal 4 and sensor 8; Voltage measurement terminal 1 is connected serially to input terminal 4 through low-pass filter 9, and input terminal 4 is connected serially to sensor 8 through standard dividing potential drop electric capacity 5.That is to say voltage measurement terminal 1 series connection low-pass filter 9, low-pass filter 9 is connected serially to input terminal 4, input terminal 4 series connection standard dividing potential drop electric capacity 5, and standard dividing potential drop electric capacity 5 is connected serially to sensor 8.
Said low-pass filter 9 is made up of standard capacitor divider 2 and inductance 3; Inductance 3 is connected between voltage measurement terminal 1 and the input terminal 4, is connected serially to inductance 3 after standard capacitor divider 2 and voltage measurement terminal 1 are parallelly connected.
In the practical operation process of the test; Input terminal 4 links to each other with the high-pressure side of tested device through coupling capacitance; The power-frequency voltage signal of tested device and high frequency office discharge signal are by input terminal 4 inputs; Office's discharge signal of its medium-high frequency reaches the secondary side of sensor through sensor 8, detects impedance in the RLC type by secondary side and is passed to surveying instrument.The power-frequency voltage signal is input to instrument by concentric cable and measures after then filtering through low-pass filter 9.Standard dividing potential drop electric capacity 5 is formed capacitive divider with coupling capacitance makes voltage measurement become possibility.
This device in use; As long as the coupling capacitance terminal is linked to each other with input terminal 4; Just can be in the measure local discharge signal; Obtain the power-frequency voltage signal at voltage measurement terminal 1 place through concentric cable and carry out voltage measurement, avoided using the trouble of capacitive divider, make things convenient for carrying out of site test.
This utility model is simple for structure rationally, and effect is obvious, is beneficial to apply.
Claims (2)
1. a partial discharge test capacitance-voltage-distributing type is measured impedance, it is characterized in that: said partial discharge test is measured impedance and is comprised voltage measurement terminal (1), input terminal (4) and sensor (8); Voltage measurement terminal (1) is connected serially to input terminal (4) through low-pass filter (9), and input terminal (4) is connected serially to sensor (8) through standard dividing potential drop electric capacity (5).
2. partial discharge test capacitance-voltage-distributing type according to claim 1 is measured impedance, and it is characterized in that: said low-pass filter (9) is made up of standard capacitor divider (2) and inductance (3); Inductance (3) is connected between voltage measurement terminal (1) and the input terminal (4), standard capacitor divider (2) be connected serially to inductance (3) after voltage measurement terminal (1) is parallelly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202640108U CN202159087U (en) | 2011-07-25 | 2011-07-25 | Capacitive voltage dividing impedance measuring system in partial discharge test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202640108U CN202159087U (en) | 2011-07-25 | 2011-07-25 | Capacitive voltage dividing impedance measuring system in partial discharge test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202159087U true CN202159087U (en) | 2012-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202640108U Expired - Lifetime CN202159087U (en) | 2011-07-25 | 2011-07-25 | Capacitive voltage dividing impedance measuring system in partial discharge test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202159087U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954890A (en) * | 2014-04-10 | 2014-07-30 | 国家电网公司 | DC partial discharge detection device and method for converter transformer |
| CN105699868A (en) * | 2016-03-08 | 2016-06-22 | 北京华天机电研究所有限公司 | Online monitoring system for power grid |
-
2011
- 2011-07-25 CN CN2011202640108U patent/CN202159087U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954890A (en) * | 2014-04-10 | 2014-07-30 | 国家电网公司 | DC partial discharge detection device and method for converter transformer |
| CN105699868A (en) * | 2016-03-08 | 2016-06-22 | 北京华天机电研究所有限公司 | Online monitoring system for power grid |
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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: LIAONING ELECTRIC POWER COMPANY LTD ELECTRIC POWER Effective date: 20121026 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121026 Address after: Heping District, Siping City of Shenyang province Liaoning 110006 Street No. 39 Patentee after: Northeast Electric Power Research Institute Co., Ltd. Patentee after: Liaoning Electric Power Co., Ltd.Electric Power Science Research Institute Patentee after: State Grid Corporation of China Address before: Heping District, Siping City of Shenyang province Liaoning 110006 Street No. 39 Patentee before: Northeast Electric Power Research Institute Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120307 |