CN202676858U - Partial discharge test system under impulse voltage - Google Patents
Partial discharge test system under impulse voltage Download PDFInfo
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- CN202676858U CN202676858U CN 201220291489 CN201220291489U CN202676858U CN 202676858 U CN202676858 U CN 202676858U CN 201220291489 CN201220291489 CN 201220291489 CN 201220291489 U CN201220291489 U CN 201220291489U CN 202676858 U CN202676858 U CN 202676858U
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- partial discharge
- test system
- impulse voltage
- signal sensor
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Abstract
The utility model relates to the field of an electrical device test, and especially relates to a partial discharge test system under impulse voltage. The partial discharge test system is characterized by comprising an impulse voltage generator (1), wherein an output terminal of the impulse voltage generator (1) is grounded through a capacitance attenuator (2) and also is connected with an input terminal of a to-be-tested device (3); the system also comprises a partial discharge signal sensor and an oscilloscope (8), wherein the partial discharge signal sensor is connected between an output terminal of the to-be-tested device (3) and the ground in series; a signal input terminal of the oscilloscope (8) is respectively connected with the capacitance attenuator (2) and the partial discharge signal sensor via transmission cables (5); and a high pass filter (7) is in series connection between the partial discharge signal sensor and the signal input terminal of the oscilloscope (8). The partial discharge test system is capable of testing partial discharge of an electrical device under effect of impulse voltage, thereby improving accuracy of fault diagnosis for the device and guaranteeing safe operation of the device.
Description
Technical field
The utility model relates to the electric equipment test field, partial discharge test system under especially a kind of surge voltage.
Background technology
Lightning impulse and switching impulse withstand voltage test are the important routine test projects of electrical equipment such as power transformer.Impulse voltage withstand test is compared AC voltage withstand test, have the advantages that the effect voltage magnitude is high, the duration is short, its for part in the checkout equipment leave over, that radome Rig up error and situations such as defective that some could expose under high field intensity are compared ac voltage withstanding is much effective.The measurement of shelf depreciation is the important means of insulation of electrical installation monitoring, measure shelf depreciation when carrying out AC voltage withstand test, insulation defect to discovering device has been brought into play vital role, particularly to some local defect in the equipment, although in power frequency withstand test, can not produce shelf depreciation, but because trial voltage is higher in the impulse voltage withstand test, therefore might in impulse voltage withstand test, expose, and these defectives are in case discharge in impulse test, owing to produced initiating electron, therefore lasting discharge very easily occurs under working voltage, causes the inefficacy of insulating.
Therefore, when being carried out the surge voltage withstand voltage test, equipment carries out the measurement of shelf depreciation, not only can rationally judge the integral insulation intensity of equipment, can also be to the insulation local defect, particularly the detectable local defect of ability exposes under the high field intensity, is conducive to insulation is carried out the evaluation of comprehensive and reasonable.
The utility model content
The purpose of this utility model provides partial discharge test system under a kind of surge voltage, adopts this system to measure accurately the shelf depreciation that electrical equipment carries out under the surge voltage.
Partial discharge test system under a kind of surge voltage, its special feature is: comprise impulse voltage generator, the output terminal of this impulse voltage generator also is being connected with the input end of tested device by in the capacitive divider ground connection, also comprise the output terminal that is connected on tested device and the local discharge signal sensor between the ground, and oscillograph, this oscillographic signal input part is connected with the local discharge signal sensor with capacitive divider by transmission cable respectively, and also is in series with Hi-pass filter between local discharge signal sensor and oscillographic signal input part.
Wherein the local discharge signal sensor is comprised of measuring resistance and current sensor, and measuring resistance is connected between the output terminal and ground of tested device, and current sensor is sleeved on the ground wire of measuring resistance.
Wherein current sensor adopts this lubber ring of Kenneth Rogoff.
Adopt the utility model to measure in the shelf depreciation under the Impulse Voltage electrical equipment, thereby improve its fault diagnosis accuracy, guarantee the safe operation of equipment.
Description of drawings
Accompanying drawing 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, partial discharge test system under a kind of surge voltage, comprise impulse voltage generator 1, the output terminal of this impulse voltage generator 1 also is being connected with the input end of tested device 3 by in capacitive divider 2 ground connection, also comprise the output terminal that is connected on tested device 3 and the local discharge signal sensor between the ground, and oscillograph 8, the signal input part of this oscillograph 8 is connected with the local discharge signal sensor with capacitive divider 2 by transmission cable 5 respectively, and also is in series with Hi-pass filter 7 between the signal input part of local discharge signal sensor and oscillograph 8.
Wherein the local discharge signal sensor is comprised of measuring resistance 4 and current sensor 6, measuring resistance 4 is connected between the output terminal and ground of tested device 3, and current sensor 6 is sleeved on the ground wire of measuring resistance 4, and current sensor 6 adopts Roger's Paderewski (Rogowski) coil.
The utility model adopts impulse voltage generator 1 as the driving voltage of equipment, and this generator can produce lightning impulse voltage and operating impulse voltage.The generator ceiling voltage is 1800kV.Adopt capacitive divider 2 to carry out the acquisition of excitation voltage waveform, capacitive divider 2 intrinsic standoff ratios are 1000: 1.Tested device 3 can be the electrical equipments such as power transformer, all insulation combined electrical apparatus.
The local discharge signal sensor adopts measuring resistance 4 and 6 two kinds of simultaneously measurements of current sensor.Wherein measuring resistance 4 adopts 50 ohm of noninductive resistances, and series connection enters between tested device 3 and the ground, is 50 ohm measurement cable access Hi-pass filter 7 by wave impedance.Current sensor 6 adopts Roger's Paderewski (Rogowski) coil, and it measures frequency band is 100kHz～30MHz, is socketed as on tested device 3 ground wires, is 50 ohm measurement cable access Hi-pass filter 7 by wave impedance.
Hi-pass filter 7 is binary channels, and frequency range is lower limit 3MHz, but the displacement current that establishment impulse voltage generator 1 produces.
The local discharge signal access oscillograph 8 that the driving voltage signal that voltage divider is obtained and measuring resistance 4, this lubber ring of Kenneth Rogoff obtain gathers and analyzes, and oscillograph 8 adopts Tykes 4104, has four-way, 1G bandwidth, the 5GHz sampling rate.
Be illustrated in figure 1 as in the utility model measurement of partial discharge under the surge voltage the application synoptic diagram, wherein impulse voltage generator 1 can produce lightning impulse and switching impulse, capacitive divider 2 is connected with impulse voltage generator 1, tested device 3 is connected with capacitive divider 2, measuring resistance 4 serial connections enter between tested device 3 and the ground, current sensor 6 is socketed on the ground wire, and the local discharge signal that the measuring resistance 4 of the voltage signal that voltage divider obtains, current sensor 6 obtain gathers and analyzes by Hi-pass filter 7 access oscillographs 8.In the actual tests, according to the needs of test, can adjust flexibly each parameter, for example impulse voltage generator 1 parameter can be chosen according to tested device 3 rated voltages, and the voltage divider no-load voltage ratio also can be chosen according to actual conditions.
Claims (3)
1. partial discharge test system under the surge voltage, it is characterized in that: comprise impulse voltage generator (1), the output terminal of this impulse voltage generator (1) also is being connected with the input end of tested device (3) by in capacitive divider (2) ground connection, also comprise the output terminal that is connected on tested device (3) and the local discharge signal sensor between the ground, and oscillograph (8), the signal input part of this oscillograph (8) is connected with the local discharge signal sensor with capacitive divider (2) by transmission cable (5) respectively, and also is in series with Hi-pass filter (7) between the signal input part of local discharge signal sensor and oscillograph (8).
2. partial discharge test system under a kind of surge voltage as claimed in claim 1, it is characterized in that: wherein the local discharge signal sensor is comprised of measuring resistance (4) and current sensor (6), measuring resistance (4) is connected between the output terminal and ground of tested device (3), and current sensor (6) is sleeved on the ground wire of measuring resistance (4).
3. partial discharge test system under a kind of surge voltage as claimed in claim 1 or 2 is characterized in that: wherein current sensor (6) adopts this lubber ring of Kenneth Rogoff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291489 CN202676858U (en) | 2012-06-20 | 2012-06-20 | Partial discharge test system under impulse voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291489 CN202676858U (en) | 2012-06-20 | 2012-06-20 | Partial discharge test system under impulse voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202676858U true CN202676858U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220291489 Expired - Fee Related CN202676858U (en) | 2012-06-20 | 2012-06-20 | Partial discharge test system under impulse voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202676858U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149518A (en) * | 2013-02-25 | 2013-06-12 | 浙江省电力公司电力科学研究院 | Partial discharge test circuit |
| CN103558521A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | Device for detecting partial discharge of transformer under surge voltage |
| CN103558522A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | Method for detecting partial discharge of transformer under surge voltage |
| CN103605051A (en) * | 2013-11-19 | 2014-02-26 | 国家电网公司 | Gas insulated metal tip defect device for partial discharge test under impact voltage |
| CN104459497A (en) * | 2014-12-18 | 2015-03-25 | 西安交通大学 | Device for measuring and analyzing partial discharge under surge voltage |
| CN105589021A (en) * | 2016-03-04 | 2016-05-18 | 云南电网有限责任公司电力科学研究院 | Partial discharge detection device and method under rectangular pulse voltage |
| CN106932699A (en) * | 2017-04-26 | 2017-07-07 | 国网上海市电力公司 | A kind of GIS oscillatory surges pressure test signal detection system |
| CN105301462B (en) * | 2015-11-26 | 2018-11-13 | 云南电网有限责任公司电力科学研究院 | Partial Discharge Measurement System and method under a kind of ns grades of surge voltage |
| CN110596545A (en) * | 2019-09-04 | 2019-12-20 | 国网江苏省电力有限公司电力科学研究院 | Partial discharge detection device and detection method based on combined action of alternating current and impulse voltage |
-
2012
- 2012-06-20 CN CN 201220291489 patent/CN202676858U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149518A (en) * | 2013-02-25 | 2013-06-12 | 浙江省电力公司电力科学研究院 | Partial discharge test circuit |
| CN103149518B (en) * | 2013-02-25 | 2015-06-03 | 浙江省电力公司电力科学研究院 | Partial discharge test circuit |
| CN103558521A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | Device for detecting partial discharge of transformer under surge voltage |
| CN103558522A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | Method for detecting partial discharge of transformer under surge voltage |
| CN103605051A (en) * | 2013-11-19 | 2014-02-26 | 国家电网公司 | Gas insulated metal tip defect device for partial discharge test under impact voltage |
| CN103605051B (en) * | 2013-11-19 | 2015-12-02 | 国家电网公司 | The partial discharge test most advanced and sophisticated defect device of gas-insulated metal under surge voltage |
| CN104459497A (en) * | 2014-12-18 | 2015-03-25 | 西安交通大学 | Device for measuring and analyzing partial discharge under surge voltage |
| CN105301462B (en) * | 2015-11-26 | 2018-11-13 | 云南电网有限责任公司电力科学研究院 | Partial Discharge Measurement System and method under a kind of ns grades of surge voltage |
| CN105589021A (en) * | 2016-03-04 | 2016-05-18 | 云南电网有限责任公司电力科学研究院 | Partial discharge detection device and method under rectangular pulse voltage |
| CN106932699A (en) * | 2017-04-26 | 2017-07-07 | 国网上海市电力公司 | A kind of GIS oscillatory surges pressure test signal detection system |
| CN110596545A (en) * | 2019-09-04 | 2019-12-20 | 国网江苏省电力有限公司电力科学研究院 | Partial discharge detection device and detection method based on combined action of alternating current and impulse voltage |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20180620 |