CN204832438U - Transformer internal discharge trouble analogue test device based on signal acquisition discharges - Google Patents
Transformer internal discharge trouble analogue test device based on signal acquisition discharges Download PDFInfo
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- CN204832438U CN204832438U CN201520620642.1U CN201520620642U CN204832438U CN 204832438 U CN204832438 U CN 204832438U CN 201520620642 U CN201520620642 U CN 201520620642U CN 204832438 U CN204832438 U CN 204832438U
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- 230000005236 sound signal Effects 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 12
- 125000006850 spacer group Chemical group 0.000 claims description 10
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- 238000005259 measurement Methods 0.000 description 2
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Abstract
The utility model provides a transformer internal discharge trouble analogue test device based on signal acquisition discharges comprises the return circuit unit that discharges, acoustical signal monitor cell, auxiliary unit, it the return circuit unit that discharges contains isolation transformer, voltage regulator, testing transformer, divider, protection resistance, box, top cap, simulation discharge electrode, acoustical signal monitor cell contains acoustic sensor, recording device, the auxiliary unit contains heater and oil temperature thermometer, and the heater is placed inside the box, and oil temperature thermometer lower extreme soaks in transformer oil. Upper and lower electrode structure, electrode distance, the discharge path of the removable difference of simulation discharge electrode for discharge and the creeping discharge in the clearance of simulating under the different parameters, acoustic sensor is favorable to reducing the external interference for placing in the inside built -in sensor of box, accurate acoustics signal when the acquisition trouble is discharged.
Description
Technical field
The utility model belongs to high pressure electrotechnics and effluve field, relates to high voltage spark test device, especially relates to a kind of inside transformer discharge fault simulation test device based on discharging sound signals collecting.
Background technology
Transformer is the major equipment of electric system, and its situation is directly connected to the safety and economic operation of electric system.The fault of transformer based on insulation fault, to the detection of shelf depreciation produced during transformer insulated deterioration and observation, can the insulation defect of Timeliness coverage inside transformer, generation of effectively preventing accident.When transformer normally runs, electric current can cause iron core to send uniform chatter to have intrinsic acoustic feature; The sound that during transformer fault, shelf depreciation produces also has its intrinsic acoustic feature.Therefore, discharging sound signal can the running status of Complete Characterization transformer.
Due to transformer body complex structure, dismounting difficulty, occur that insulation degradation fault is irreversible, it is worthless for therefore carrying out high voltage spark test by transformer body.Simultaneously, the acoustic feature of the discharging sound signal under different designs parameter during transformer fault is different, only the failure condition that acoustical signal that discharge test obtains can not contain all types transformer is carried out to the transformer of a certain model, the erroneous judgement appearing in fault in transformer actual motion or the situation of failing to judge, have a strong impact on power grid operation.In a word, in order to reach requirement to the reproduction simulation of fault and sample size, must targeted design internal discharge fault simulating test device.
Summary of the invention
The purpose of this utility model is to provide a kind of inside transformer discharge fault simulation test device based on discharging sound signals collecting, it can simulate the inside transformer running environment under different oil temperature condition, and the gap discharge of simulating according to the actual requirements under different arcing distance, creeping discharge fault, the monitoring of discharging sound signal is carried out by sensor equipment, record, so that O&M maintainer extracts acoustic signal feature, the acoustical signal produced for transformer in running is compared, thus find internal fault electric discharge in advance, timely arrangement test, defect elimination, avoid the generation of power grid accident.
A kind of inside transformer discharge fault simulation test device based on discharging sound signals collecting that the utility model proposes, simulation test device is made up of discharge loop unit, acoustical signal monitoring means, auxiliary unit.
Discharge loop unit comprises isolating transformer, pressure regulator, testing transformer, voltage divider, protective resistance, casing, top cover, simulation sparking electrode.Isolating transformer, for isolating civil power and test discharge circuit, plays a role in filtering to the supply voltage of electrical network supply simultaneously, isolating transformer input termination mains supply, and output terminal is connected with pressure regulator input end; Pressure regulator is autotransformer, input voltage one timing, and regulation output voltage carries out experimental test, and pressure regulator input end is connected with isolating transformer output terminal, and output voltage regulator is connected with testing transformer input end; Testing transformer is used for input voltage to boost, obtain sufficiently high output voltage and realize disruptive discharge, testing transformer input end is connected with output voltage regulator, the output high-pressure side of testing transformer is connected with the input end of protective resistance, the upper end of voltage divider simultaneously, exports low pressure end and is connected with earth point; Voltage divider is for monitoring transformer output end voltage value, and voltage divider upper end is connected with testing transformer output terminal, voltage divider bottom ground connection; Protective resistance plays a part current limliting, and for the protection test transformer when simulating sparking electrode disruptive discharge, protective resistance input end is connected with testing transformer output terminal, and output terminal is connected with simulation sparking electrode upper end; Casing is used for analogue transformer body, and transformer oil is filled with in its inside; Top cover is positioned at casing top, by open top cover complete oil-filled, change the work such as electrode, have pass through aperture in the middle part of top cover, for the top electrode of fixed-analog sparking electrode; Simulation sparking electrode is in box house; the replaceable different top-bottom electrode structures of simulation sparking electrode, electrode separation, discharge path; in order to simulate gap discharge under different parameters and creeping discharge; simulation electrode upper end is connected with protective resistance, and casing lower bottom part is fixed on and ground connection in bottom.
Wherein simulate sparking electrode to be made up of lower electrode holder, clavate bottom electrode, plate electrode, upper electrode holder, clavate top electrode, insulation spacer, adjusting screw(rod).The adjustment of adjusting screw(rod) for regulating electrode separation to realize discharge parameter, adjusting screw(rod) upper end is connected with protective resistance output terminal, and the through hole of bottom in the middle part of upper electrode holder stretches into casing, and bottom is connected with the upper end of clavate top electrode; Upper electrode holder inserts the through hole in the middle part of top cover by below, and upper electrode holder top flushes with top cover upper end, is provided with pass through aperture in the middle part of upper electrode holder, enters box house after clavate top electrode is connected with adjusting screw(rod) through this through hole; Clavate top electrode upper end is connected with adjusting screw(rod), clavate top electrode this as rod-like structure, can select to be connected with plate electrode by the joinery and its construction of lower end to make bottom electrode change into slab construction simultaneously; Clavate bottom electrode is fixed on the bottom of casing by lower electrode holder, the bottom ground connection of clavate bottom electrode, clavate bottom electrode this as rod-like structure, can select to be connected with plate electrode by the joinery and its construction of upper end to make bottom electrode change into slab construction simultaneously; The various combinations such as rod-rod gap, rod plain gap, plate-sheet separation can be obtained, in order to the inner nonuniform field of analogue transformer to the gap discharge in uniform field situation by the structure changing upper/lower electrode; Meanwhile, when bottom electrode is plate electrode, some insulation spacers (insulation spacer gross thickness is equal with electrode separation) can be placed between upper/lower electrode, in order to the inner nonuniform field of analogue transformer to the creeping discharge in uniform field situation.
Acoustical signal monitoring means comprises acoustic sensor, sound pick-up outfit.Acoustic sensor is positioned over box house, and acoustic sensor input end and electrode gap are in same level, and for detecting the acoustical signal that simulation sparking electrode produces when discharging, acoustic sensor output terminal is connected with sound pick-up outfit input end; Sound pick-up outfit is connected with acoustic sensor output terminal, acoustical signal is carried out record and preserves.
Auxiliary unit comprises well heater and oil temperature thermometer.Well heater is positioned over box house, and for giving transformer oil heat temperature raising, when running with analogue transformer, transformer oil produces the situation of temperature rise; Oil temperature thermometer lower end is immersed in transformer oil, and for measuring the oil temperature numerical value after heating, oil temperature thermometer upper end is positioned at casing outside, for oil temperature Real-Time Monitoring and reading.
The utility model has the advantages that:
(1) simulation test device is made up of discharge loop unit, acoustical signal monitoring means, auxiliary unit.
(2) the discharge loop unit of simulation test device adopts isolating transformer, and effectively isolation civil power and test discharge circuit, play a role in filtering to the supply voltage of electrical network supply, reduce external power source interference.
(3) casing is enclosed construction, effectively reduces external electromagnetic radiation and interference.
(4) discharge loop unit has protective resistance, can available protecting testing transformer, extends testing transformer serviceable life.
(4) simulate discharge electrode structure can adjust flexibly, by adjusting screw(rod), changing electrode shape can simulation electrode different spacing, gap discharge fault under different electric field degrees of irregularity; Simultaneously also can by placing the creeping discharge fault under insulation spacer simulation different spacing, different electric field degrees of irregularity between upper/lower electrode.
(5) simulation test device is provided with well heater and oil temperature thermometer, can more in accurate analog real work main transformer oil there is the situation of temperature rise.
(6) acoustic sensor is the built-in sensors being positioned over box house, is conducive to reducing external disturbance, acoustic signal accurately when obtaining fault discharge.
Accompanying drawing explanation
Fig. 1 is structure diagram of the present invention;
Fig. 2 is system construction drawing of the present invention;
Fig. 3 is simulation discharge electrode structure schematic diagram of the present invention;
Name corresponding to Reference numeral is called:
1-discharge loop unit, 2-acoustical signal monitoring means, 3-auxiliary unit, 4-isolating transformer; 5-pressure regulator, 6-testing transformer, 7-voltage divider, 8-protective resistance; 9-well heater, 10-oil temperature thermometer, 11-simulates sparking electrode, 12-top cover; 13-casing, 14-acoustic sensor, 15-sound pick-up outfit, 101-lower electrode holder; 102-clavate bottom electrode, 103-plate electrode, 104-upper electrode holder; 105-clavate top electrode, 106-insulation spacer, 107-adjusting screw(rod).
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.It should be noted that at this, the explanation of these embodiments understands the present invention for helping, but does not form limitation of the invention.
Fig. 1 illustrates the inside transformer discharge fault simulation test device based on discharging sound signals collecting of one embodiment of the invention.Simulation test device is made up of a discharge loop unit 1, several acoustical signal monitoring means 2, auxiliary unit 3.Wherein acoustical signal monitoring means should at least be greater than 2, to guarantee reliably monitor and record discharging sound signal in inside transformer discharge fault simulation test.
Discharge loop unit 1 is by isolating transformer 4, and pressure regulator 5, testing transformer 6, voltage divider 7, protective resistance 8, simulation sparking electrode 11, top cover 12, casing 13 forms.
The input termination mains supply of isolating transformer 4, output terminal is connected with the input end of pressure regulator 5, and isolating transformer effectively can stop the transmission of mains side fractional harmonic, reduces the impact on system in the discharge process of simulation test simultaneously; Pressure regulator 5 is autotransformer, carries out experimental test for regulation output voltage, and pressure regulator 5 input end is connected with isolating transformer 4 output terminal, and the output terminal of pressure regulator 5 is connected with the input end of testing transformer 6; Testing transformer 6 is for boosting input voltage; export sufficiently high voltage and realize disruptive discharge; the input end of testing transformer 6 is connected with the output terminal of pressure regulator 5; the output high-pressure side of testing transformer 6 is connected with the input end of protective resistance 8, the upper end of voltage divider 7 simultaneously, exports low pressure end and is connected with earth point.
Isolating transformer 4 only needs to meet input voltage 220V; and there is basic humidity resistance and overcurrent protection function; isolating transformer can select the single-phase isolating transformer of SG, the single-phase isolating transformer of DG etc.; with the single-phase shielding isolating transformer of DG (1:1; 50kVA) be example; be applicable to the alternating circuit of 50 ~ 60hz, without additional waveform distortion, there is overcurrent protection.The single-phase voltage regulator of range of regulation 0-250V generally selected by pressure regulator 5, can select the single-phase contact automatic coupling voltage regulator (0-250V) of TDGC2J-50kVA, realize the continuously adjustabe to voltage, be beneficial to the accurate measurement of voltage divider 7 pairs of discharge parameters.Testing transformer 6 is step-up transformer, YDJ AC type testing transformer or TDM AC/DC light high pressure testing transformer can be selected, for YDJ(Z)-30/150 AC type testing transformer, its capacity is 50kVA, low-pressure side parameter 380V/132A, high-pressure side parameter 150kV/0.2A, can meet testing requirements.
Voltage divider 7 is for the magnitude of voltage of monitoring test transformer 6 output terminal, and the upper end of voltage divider 7 exports high-pressure side with testing transformer 6 and is connected, voltage divider 7 bottom ground connection; Protective resistance 8 plays current limliting, protection test transformer 6 during for simulating sparking electrode 11 disruptive discharge, and protective resistance 8 input end and testing transformer 6 export high-pressure side end and be connected, and output terminal is connected with simulation sparking electrode 11 upper end.
Voltage divider generally uses RC divider (alternating current-direct current voltage divider), requirement has high precision, high linearity, high stability, jamproof feature, can select the western high GDFR-150 RC divider of state's electricity, electric pressure 150kV, intrinsic standoff ratio 10000:1, accuracy 1.0%, can in real time, accurate measurements testing transformer 6 exports the magnitude of voltage of high-pressure side.Protective resistance 8 selects water resistance, and resistance value is 1M Ω.
Casing 13 is for analogue transformer body, transformer oil is filled with in its inside, simulation sparking electrode 11, well heater 9, oil temperature thermometer 10, acoustic sensor 14 are all placed in casing 13 inside, for completing the work such as heating, thermometric, acoustical signal processing in casing 13 inside; Top cover 12 is positioned at casing 13 top, plays the effect of the top electrode of seal case and fixed-analog sparking electrode 11, can open top cover 12 complete oil-filled, change the work such as electrode.
Casing 13 material selection iron plate is made, and is of a size of the rectangular parallelepiped of 15cm × 20cm × 10cm, inner perfusion 10# transformer oil.Top cover 12 material is polyoxymethylene (POM), is of a size of radius 5cm, and the circular piece of thickness 0.5cm has the through hole of radius 0.8cm in the middle part of top cover 12, for the upper electrode holder 104 of fixed-analog sparking electrode 11.
Simulation sparking electrode 11 is made up of lower electrode holder 101, clavate bottom electrode 102, plate electrode 103, upper electrode holder 104, clavate top electrode 105, insulation spacer 106, adjusting screw(rod) 107.Adjusting screw(rod) 107 is for regulating electrode separation, and adjusting screw(rod) 107 upper end is connected with protective resistance 8 output terminal, and the through hole of bottom in the middle part of upper electrode holder 104 stretches into the inside of casing 13, and bottom is connected with the upper end of clavate top electrode 105; Upper electrode holder 104 inserts the through hole in the middle part of top cover 9 by below, and upper electrode holder 104 top flushes with top cover 9 upper end, be provided with pass through aperture in the middle part of upper electrode holder 104, enter casing 13 through this through hole after clavate top electrode 105 is connected with adjusting screw(rod) 107 inner; Clavate top electrode 105 upper end is connected with adjusting screw(rod) 107, and clavate top electrode 107, as rod-like structure, can be selected to be connected with plate electrode 103 by the joinery and its construction of lower end to make bottom electrode change into slab construction simultaneously; Clavate bottom electrode 102 is fixed on the bottom of casing 13 by lower electrode holder 101, the bottom ground connection of clavate bottom electrode 102, clavate bottom electrode 102, as rod-like structure, can be selected to be connected with plate electrode 103 by the joinery and its construction of upper end to make bottom electrode change into slab construction simultaneously; The various combinations such as rod-rod gap, rod plain gap, plate-sheet separation can be obtained, in order to the inner nonuniform field of analogue transformer to the gap discharge in uniform field situation by the structure changing upper/lower electrode; Meanwhile, when bottom electrode is plate electrode, it is equal with electrode separation to place some insulation spacer 106(insulation spacer gross thickness between upper/lower electrode), in order to the inner nonuniform field of analogue transformer to the creeping discharge in uniform field situation.
Claims (8)
1., based on the inside transformer discharge fault simulation test device of discharging sound signals collecting, it is characterized in that being made up of discharge loop unit, acoustical signal monitoring means, auxiliary unit;
Described discharge loop unit comprises isolating transformer, pressure regulator, testing transformer, voltage divider, protective resistance, casing, top cover, simulation sparking electrode; Isolating transformer input termination mains supply, output terminal is connected with pressure regulator input end; Output voltage regulator is connected with testing transformer input end; The output high-pressure side of testing transformer is connected with the input end of protective resistance, the upper end of voltage divider simultaneously, exports low pressure end and is connected with earth point; Voltage divider bottom ground connection; The output terminal of protective resistance is connected with simulation sparking electrode upper end; Casing is used for analogue transformer body, and transformer oil is filled with in its inside; Top cover is positioned at casing top, has pass through aperture in the middle part of top cover, for the top electrode of fixed-analog sparking electrode; Simulation sparking electrode is in box house, and simulation electrode upper end is connected with protective resistance, and casing lower bottom part is fixed on and ground connection in bottom;
Described acoustical signal monitoring means comprises acoustic sensor, sound pick-up outfit, and acoustic sensor is positioned over box house, and acoustic sensor output terminal is connected with sound pick-up outfit input end;
Described auxiliary unit comprises well heater and oil temperature thermometer, and well heater is positioned over box house, and oil temperature thermometer lower end is immersed in transformer oil.
2., according to claim 1 based on the inside transformer discharge fault simulation test device of discharging sound signals collecting, it is characterized in that: described simulation sparking electrode is made up of lower electrode holder, clavate bottom electrode, plate electrode, upper electrode holder, clavate top electrode, adjusting screw(rod); Adjusting screw(rod) upper end is connected with protective resistance output terminal, and the through hole of bottom in the middle part of upper electrode holder stretches into casing, and bottom is connected with the upper end of clavate top electrode; Upper electrode holder inserts the through hole in the middle part of top cover by below, and upper electrode holder top flushes with top cover upper end, is provided with pass through aperture in the middle part of upper electrode holder, enters box house after clavate top electrode is connected with adjusting screw(rod) through this through hole; Clavate bottom electrode is fixed on the bottom of casing by lower electrode holder, the bottom ground connection of clavate bottom electrode.
3. according to claim 2 based on the inside transformer discharge fault simulation test device of discharging sound signals collecting, it is characterized in that: clavate top electrode this as rod-like structure, can select to be connected with plate electrode by the joinery and its construction of lower end to make bottom electrode change into slab construction simultaneously.
4. according to Claims 2 or 3 based on the inside transformer discharge fault simulation test device of discharging sound signals collecting, it is characterized in that: clavate bottom electrode this as rod-like structure, can select to be connected with plate electrode by the joinery and its construction of upper end to make bottom electrode change into slab construction simultaneously.
5. according to claim 4 based on the inside transformer discharge fault simulation test device of discharging sound signals collecting, it is characterized in that: rod-rod gap, rod plain gap, plate-sheet separation combination can be obtained by the structure changing upper/lower electrode.
6., according to claim 5 based on the inside transformer discharge fault simulation test device of discharging sound signals collecting, it is characterized in that: when bottom electrode is plate electrode, some insulation spacers can be placed between upper/lower electrode.
7., according to claim 6 based on the inside transformer discharge fault simulation test device of discharging sound signals collecting, it is characterized in that: insulation spacer gross thickness is equal with electrode separation.
8., according to claim 5 based on the inside transformer discharge fault simulation test device of discharging sound signals collecting, it is characterized in that: acoustic sensor input end and electrode gap are in same level.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106771926A (en) * | 2017-01-04 | 2017-05-31 | 广西电网有限责任公司电力科学研究院 | One kind orientation introducing-type inside transformer electrical discharge generator |
| CN107422200A (en) * | 2017-05-18 | 2017-12-01 | 中国电力科学研究院 | Transformer fault simulation system |
| CN107907810A (en) * | 2017-11-03 | 2018-04-13 | 北京东方计量测试研究所 | The adjustable parallel-plate electrode Electromagnetic Field Irradiation discharge system of vacuum |
| CN109239559A (en) * | 2018-11-15 | 2019-01-18 | 哈尔滨理工大学 | A kind of combined type for learning gas discharging law is adjustable experimental electrode |
| CN109342895A (en) * | 2018-10-26 | 2019-02-15 | 许继（厦门）智能电力设备股份有限公司 | A kind of gas-insulated characteristic test device |
| CN110095695A (en) * | 2019-06-11 | 2019-08-06 | 云南电网有限责任公司电力科学研究院 | A kind of oil clearance arc discharge experimental model |
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| CN110389286A (en) * | 2018-12-20 | 2019-10-29 | 哈尔滨理工大学 | A kind of measurement method for solid dielectric test print disruptive field intensity |
| CN110907707A (en) * | 2019-12-06 | 2020-03-24 | 广东电网有限责任公司 | Device and method for testing influence of ground wire claw gap discharge on unmanned aerial vehicle |
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| CN113092961A (en) * | 2021-04-01 | 2021-07-09 | 国网浙江省电力有限公司电力科学研究院 | Converter transformer partial discharge model operating mechanism |
| CN113466602A (en) * | 2021-08-24 | 2021-10-01 | 华北电力大学（保定） | Arc experiment testing method and system |
| CN114002571A (en) * | 2021-11-03 | 2022-02-01 | 华北电力大学 | Profiling electrode for testing insulation characteristic of transformer angle ring structure |
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- 2015-08-18 CN CN201520620642.1U patent/CN204832438U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106771926A (en) * | 2017-01-04 | 2017-05-31 | 广西电网有限责任公司电力科学研究院 | One kind orientation introducing-type inside transformer electrical discharge generator |
| CN107422200A (en) * | 2017-05-18 | 2017-12-01 | 中国电力科学研究院 | Transformer fault simulation system |
| CN107422200B (en) * | 2017-05-18 | 2021-02-19 | 中国电力科学研究院 | Transformer fault simulation system |
| CN107907810A (en) * | 2017-11-03 | 2018-04-13 | 北京东方计量测试研究所 | The adjustable parallel-plate electrode Electromagnetic Field Irradiation discharge system of vacuum |
| CN107907810B (en) * | 2017-11-03 | 2020-12-04 | 北京东方计量测试研究所 | Parallel plate electrode electromagnetic field irradiation discharge system with adjustable vacuum degree |
| CN109342895A (en) * | 2018-10-26 | 2019-02-15 | 许继（厦门）智能电力设备股份有限公司 | A kind of gas-insulated characteristic test device |
| CN109239559A (en) * | 2018-11-15 | 2019-01-18 | 哈尔滨理工大学 | A kind of combined type for learning gas discharging law is adjustable experimental electrode |
| CN110389286A (en) * | 2018-12-20 | 2019-10-29 | 哈尔滨理工大学 | A kind of measurement method for solid dielectric test print disruptive field intensity |
| CN110095695A (en) * | 2019-06-11 | 2019-08-06 | 云南电网有限责任公司电力科学研究院 | A kind of oil clearance arc discharge experimental model |
| CN110161393A (en) * | 2019-07-01 | 2019-08-23 | 云南电力技术有限责任公司 | Intermittent electric arc test macro |
| CN110933792B (en) * | 2019-12-04 | 2022-03-08 | 国网湖南省电力有限公司 | Transformer fire-extinguishing true test insulating oil heating system and method |
| CN110933792A (en) * | 2019-12-04 | 2020-03-27 | 国网湖南省电力有限公司 | Transformer fire-extinguishing true test insulating oil heating system and method |
| CN110907707A (en) * | 2019-12-06 | 2020-03-24 | 广东电网有限责任公司 | Device and method for testing influence of ground wire claw gap discharge on unmanned aerial vehicle |
| CN113092961A (en) * | 2021-04-01 | 2021-07-09 | 国网浙江省电力有限公司电力科学研究院 | Converter transformer partial discharge model operating mechanism |
| CN113092961B (en) * | 2021-04-01 | 2022-07-05 | 国网浙江省电力有限公司电力科学研究院 | Converter transformer partial discharge model operating mechanism |
| CN113466602A (en) * | 2021-08-24 | 2021-10-01 | 华北电力大学（保定） | Arc experiment testing method and system |
| CN114002571A (en) * | 2021-11-03 | 2022-02-01 | 华北电力大学 | Profiling electrode for testing insulation characteristic of transformer angle ring structure |
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