CN203191508U - GIS partial-discharge detection test platform based on transient-earthing radio waves - Google Patents
GIS partial-discharge detection test platform based on transient-earthing radio waves Download PDFInfo
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- CN203191508U CN203191508U CN 201320240657 CN201320240657U CN203191508U CN 203191508 U CN203191508 U CN 203191508U CN 201320240657 CN201320240657 CN 201320240657 CN 201320240657 U CN201320240657 U CN 201320240657U CN 203191508 U CN203191508 U CN 203191508U
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Abstract
The utility model discloses a GIS partial-discharge detection test platform based on transient-earthing radio waves. The test platform relates to the field of partial-discharge detection test platform. The technical scheme is that the test platform includes a GIS model, a power-frequency pressurization system, a TEV partial-discharge detection system and a partial-discharge model; the power-frequency pressurization system includes a power-frequency console, boosting transformers, a protection resistor, a coupling capacitor and a conducting rod; and the TEV partial-discharge detection system includes a partial discharger, coaxial transmission cables and a TEV sensor. Through the GIS partial-discharge detection test platform based on the transient-earthing radio waves, three kinds of partial discharges can be detected and the discharge types can be well discriminated with respect to the partial-discharge spectrograms obtained through the three kinds of partial discharge detections according to the method of transient-earthing radio waves .
Description
Technical field
The utility model belongs to Partial Discharge Detection test platform design field, relates in particular to a kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave.
Background technology
Shelf depreciation among the GIS is one of main forms of its insulation defect.At present at the scene under the situation, to the measurement (comprising online and off-line measurement) of this type of discharge conventional IEC pulse current detection method, ultrasonic Detection Method, superfrequency (the Ultra High Frequency:UHF) detection methods etc. of adopting more.Wherein conventional pulse current detection method can be demarcated discharge capacity, but because the GIS shell adopts multipoint earthing, and office's discharge stream of passing through in each root ground wire is all very little, sensitivity is very low.Ultrasonic sensor is by receiving the vibration signal of local discharge generation, also can the inner shelf depreciation of checkout equipment; But only to specific electric discharge type (as beating of conductive particle on the metal base plate) relatively effectively, the measurement sensitivity of insulation being supported creeping discharge is relatively low usually for this method.The superfrequency detection method began progressively to begin in Equipment Inspection to use the eighties in 20th century.It is higher to be characterized in detecting frequency range, and the common electric signal that can avoid effectively in the multiple online Partial Discharge Detection such as electric switch operation is disturbed, and detection sensitivity is higher, and can identify fault type and position.
But usually adopt the intermediate head mode of full-shield in the modern generalized information system, ultrahigh-frequency signal can not pass to the outside by screen layer, and can only come survey bureau's discharge signal this moment by measure the transient state ground voltage rising (Transient Earthing Voltage:TEV) that this signal externally induces when the GIS pipe interior is propagated.Therefore, carry out based on transient state ground electric wave method and GIS office is put into row is measured and diagnosis has certain theory and is worth and Practical significance.
Summary of the invention
Put deficiency aspect the accuracy at the method for survey bureau's discharge signal in the generalized information system of mentioning in the background technology in detection and Identification GIS office, the utility model proposes a kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave.
A kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave is characterized in that, described test platform comprises that GIS model, power frequency compression system, TEV office put detection system and local discharging model; Described power frequency compression system comprises power frequency control desk, step-up transformer, protective resistance, coupling capacitance and conducting rod; Described TEV office puts detection system and comprises PD meter, coaxial transmission cable and TEV sensor;
Wherein, the input end of described power frequency control desk links to each other with electrical network, and output terminal links to each other with the low pressure input end of step-up transformer;
The output terminal of described step-up transformer connects protective resistance successively and coupling capacitance is formed the loop;
Described GIS model two ends are connected with the two ends of coupling capacitance respectively;
Described TEV sensor is connected with described PD meter by coaxial transmission cable; Described TEV sensor is affixed on the GIS model;
Described shelf depreciation model is positioned in the GIS model.
Described GIS model comprises GIS bus chamber and GIS shell; Described GIS bus chamber comprises 6 sections air chambers; Described each air chamber is equipped with enclosed valve, and an operation hand hole is left in the side.
Described shelf depreciation model comprises big metallic particles discharging model on high-pressure conductor spine discharging model, suspension discharging model and the cavity.
The beneficial effects of the utility model are by this test platform three class offices to be put into capable test and can verify:
(a) different disposing ways do not influence the TEV signal testing transient state ground electric wave sensor at GIS shell same position place.
(b) during from the same distance of signal source and without T type mouth, the signal that records is basic identical on GIS for transient state ground electric wave sensor.
(c) transient state ground electric wave sensor from the signal source distance more away from signal more faint.Should guarantee as far as possible that measurement point is in two meters of signal sources.
(d) can there be decay in signal when signal process GIS T type mouth.This should be that this structure has caused loss to signal when passing through T type mouth owing to signal.Attenuation degree is approximately 10%.
(e) according to transient state ground electric wave method spectrogram is put in the office of three class shelf depreciations test gained and can both well distinguish electric discharge type.And obtain as drawing a conclusion: the sensitivity that transient state ground electric wave method measurement GIS office puts is followed successively by big metallic particles discharging model on high-pressure conductor spine discharging model, suspension discharging model, the cavity from high to low.
Description of drawings
Fig. 1 is the GIS illustraton of model of a kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave of providing of the utility model;
Fig. 2 is the power frequency compression system structural drawing that the utility model provides;
Fig. 3 is the high-pressure conductor spine discharging model figure of a kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave of providing of the utility model;
Fig. 4 is the suspension discharging model figure of a kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave of providing of the utility model;
Fig. 5 is big metallic particles discharging model figure on the cavity of a kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave of providing of the utility model;
Fig. 6 is the partial discharge test of a kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave of providing of the utility model and detects the loop synoptic diagram;
Wherein, 1-first air chamber; 2-second air chamber; 3-the 3rd air chamber; 4-the 4th air chamber; 5-the 5th air chamber; 6-the 6th air chamber; 7-operates hand hole; 8-GIS bus chamber; The 9-GIS shell; The 10-step-up transformer; The 11-protective resistance; The 12-coupling capacitance; The 13-pin; The 14-M10 nut; 15-power frequency control desk; The 16-step-up transformer; The 17-GIS model; Detection system is put in 18-TEV office; The 19-TEV sensor; The 20-PD meter; 21-shelf depreciation model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit scope of the present utility model and application thereof.
Fig. 1 is the GIS illustraton of model of a kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave of providing of the utility model.Among Fig. 1, described GIS model comprises GIS bus chamber and GIS shell; Described GIS bus chamber comprises 6 sections air chambers; Described each air chamber is equipped with enclosed valve, and an operation hand hole is left in the side.Maximum air chamber length is 900mm, and minimum air cell is test cavity, and its length is 550mm, and each air chamber is equipped with enclosed valve, can inflate exhaust easily.What gasmetry was used is German WIKA densitometer, and the densitometer top pressure is 0.9MPa, and maximal input is 30W/50VA.There is an operation hand hole side of each air chamber, by hand hole the various faults that can produce shelf depreciation can be set artificially.
Fig. 2 is the power frequency compression system structural drawing that the utility model provides.Among Fig. 2, described power frequency compression system comprises power frequency control desk, step-up transformer, protective resistance, coupling capacitance and conducting rod.
The utility model has designed three class discharging models altogether, is respectively big metallic particles discharging model such as Fig. 5 on high-pressure conductor spine discharging model such as Fig. 3, suspension discharging model such as Fig. 4, the cavity.
Fig. 6 is the partial discharge test of a kind of GIS Partial Discharge Detection test platform based on transient state ground electric wave of providing of the utility model and detects the loop synoptic diagram.Experiment power supply is linked on the step-up transformer after the output of power frequency control desk.Step-up transformer model YDTW-10/120, protective resistance, resistance is 10k Ω, is connected on the output terminal of step-up transformer, the output current of testing transformer when puncturing with the restriction test product.High-voltage capacitor is with the pulsed current signal of coupled discharge model shelf depreciation generation.TEV office puts detection system and comprises TEV sensor and PD meter.
One, the research of TEV signal
In No. 3 cavitys of test GIS, put into high-pressure conductor spine model, charge into the SF6 gas of 0.9MPa after closed cavity vacuumizes.Before experiment launches experiment is demarcated, demarcating the source signalization is the 100pc pulse signal, adjusts the PD meter range and makes 1mv represent the 1pc discharge, carries out experiment then.
Impressed voltage is risen to the stable shelf depreciation of generation.
(1) research is in the test result contrast of the different disposing ways of same position sensor
Sensor is placed in a certain position of cavity No. 3, with the SMD TEV sensor of rectangle respectively traverse and placing vertically record two groups of offices and put data and compare.
(2) research GIS is last contrasts apart from the test result of diverse location equally from signal source
Sensor is placed on two positions of putting the source same distance from office respectively to be recorded two groups of data and carries out the contrast that data are put in office.
(3) the test result contrast of research GIS diverse location
Sensor is placed on cavity respectively 1 to No. 6, and testing sensor is put data and is compared in the office that records of these six position correspondences respectively.
(4) research TEV signal is through GIS T type mouth attenuation
Sensor is placed on test GIS2 number and No. 3 cavitys respectively, and testing sensor records in these two positions respectively innings puts data and compares.
Two, the test that model is put in three kinds of offices
In No. 4 cavitys of test GIS, put into high-pressure conductor spine model, charge into the SF6 gas of 0.9MPa after closed cavity vacuumizes.Before experiment launches experiment is demarcated, demarcating the source signalization is 100pc, and adjustment PD meter range makes 1mv represent 1pc to carry out experiment then.The method of progressively boosting is taked in experiment, and the experimental voltage that namely at first slowly raises in the experiment is until comparatively stable shelf depreciation occurring.According to certain amplitude boosted voltage progressively, note discharge capacity, discharge time and discharge phase under each electric pressure then.
Change big metallic particles discharging model on suspension discharging model, the cavity successively after then SF6 gas among the GIS being discharged.
Charge into after closed cavity vacuumizes and adopt behind the SF6 gas of 0.9MPa the above-mentioned test method office of noting to put data.
The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (3)
1. the GIS Partial Discharge Detection test platform based on transient state ground electric wave is characterized in that, described test platform comprises that GIS model, power frequency compression system, TEV office put detection system and local discharging model; Described power frequency compression system comprises power frequency control desk, step-up transformer, protective resistance, coupling capacitance and conducting rod; Described TEV office puts detection system and comprises PD meter, coaxial transmission cable and TEV sensor;
Wherein, the input end of described power frequency control desk links to each other with electrical network, and output terminal links to each other with the low pressure input end of step-up transformer;
The output terminal of described step-up transformer connects protective resistance successively and coupling capacitance is formed the loop;
Described GIS model two ends are connected with the two ends of coupling capacitance respectively;
Described TEV sensor is connected with described PD meter by coaxial transmission cable; Described TEV sensor is affixed on the GIS model;
Described shelf depreciation model is positioned in the GIS model.
2. test platform according to claim 1 is characterized in that, described GIS model comprises GIS bus chamber and GIS shell; Described GIS bus chamber comprises 6 sections air chambers; Described each air chamber is equipped with enclosed valve, and an operation hand hole is left in the side.
3. test platform according to claim 1 is characterized in that, described shelf depreciation model comprises big metallic particles discharging model on high-pressure conductor spine discharging model, suspension discharging model and the cavity.
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| CN 201320240657 CN203191508U (en) | 2013-05-07 | 2013-05-07 | GIS partial-discharge detection test platform based on transient-earthing radio waves |
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| CN 201320240657 CN203191508U (en) | 2013-05-07 | 2013-05-07 | GIS partial-discharge detection test platform based on transient-earthing radio waves |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954888A (en) * | 2014-03-31 | 2014-07-30 | 国家电网公司 | Suspension discharge test model suspension discharge detection positioning device and method |
| CN103969562A (en) * | 2014-05-29 | 2014-08-06 | 广州供电局有限公司 | Simulated partial discharge detection device for switch cabinet |
| CN104360301A (en) * | 2014-12-12 | 2015-02-18 | 国家电网公司 | Method for calibrating local discharge detection device employing transient voltage method |
| CN106291149A (en) * | 2015-05-22 | 2017-01-04 | 中国电力科学研究院 | A kind of live detection method of 10kV switch cubicle |
| CN107918092A (en) * | 2017-12-12 | 2018-04-17 | 北京交通大学 | A kind of temporary electric discharge quantity measuring method of partial discharge of switchgear |
| CN108802582A (en) * | 2018-06-22 | 2018-11-13 | 广西电网有限责任公司电力科学研究院 | A kind of high-voltage cable middle joint Partial Discharge Detection pilot system |
-
2013
- 2013-05-07 CN CN 201320240657 patent/CN203191508U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954888A (en) * | 2014-03-31 | 2014-07-30 | 国家电网公司 | Suspension discharge test model suspension discharge detection positioning device and method |
| CN103969562A (en) * | 2014-05-29 | 2014-08-06 | 广州供电局有限公司 | Simulated partial discharge detection device for switch cabinet |
| CN104360301A (en) * | 2014-12-12 | 2015-02-18 | 国家电网公司 | Method for calibrating local discharge detection device employing transient voltage method |
| CN104360301B (en) * | 2014-12-12 | 2017-07-11 | 国家电网公司 | A kind of calibration method for transient earth voltage method partial discharge detection device |
| CN106291149A (en) * | 2015-05-22 | 2017-01-04 | 中国电力科学研究院 | A kind of live detection method of 10kV switch cubicle |
| CN107918092A (en) * | 2017-12-12 | 2018-04-17 | 北京交通大学 | A kind of temporary electric discharge quantity measuring method of partial discharge of switchgear |
| CN107918092B (en) * | 2017-12-12 | 2019-10-22 | 北京交通大学 | A method of it is quantitative for partial discharge of switchgear transient earth voltage signal |
| CN108802582A (en) * | 2018-06-22 | 2018-11-13 | 广西电网有限责任公司电力科学研究院 | A kind of high-voltage cable middle joint Partial Discharge Detection pilot system |
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| 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: 20130911 Termination date: 20190507 |