CN201965195U - Turn-to-turn insulation detection device for light dry reactor - Google Patents

Turn-to-turn insulation detection device for light dry reactor Download PDF

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Publication number
CN201965195U
CN201965195U CN2010205929952U CN201020592995U CN201965195U CN 201965195 U CN201965195 U CN 201965195U CN 2010205929952 U CN2010205929952 U CN 2010205929952U CN 201020592995 U CN201020592995 U CN 201020592995U CN 201965195 U CN201965195 U CN 201965195U
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CN
China
Prior art keywords
voltage
turn
reactor
test
dry reactor
Prior art date
Application number
CN2010205929952U
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Chinese (zh)
Inventor
江少成
戴瑞海
夏晓波
颜军敏
林坚
马明
陈谢杰
林琳
王文敏
陈达
刘可达
Original Assignee
温州电力局
江少成
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Priority to CN2010205929952U priority Critical patent/CN201965195U/en
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Publication of CN201965195U publication Critical patent/CN201965195U/en

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Abstract

The utility model relates to a turn-to-turn insulation detection device for a light dry reactor. An input end of a voltage regulator is connected with an alternate current power supply AC and is used for regulating the alternate current power supply. An output end of the voltage regulator is connected with a boosting transformer. The boosting transformer is used for boosting the alternate current power supply which is subjected to voltage regulation and outputting a high-voltage current. The high-voltage current is transmitted into a voltage multiplying tower and is subjected to boosting by the voltage multiplying tower to a rated test voltage. The voltage multiplying tower has functions of stabilizing the voltage and filtering. One end of a test capacitor is grounded and the other end of the test capacitor is connected in series with a current-limiting resistance and then is connected with the voltage multiplying tower. After being connected in series with a sphere gap, a voltage divider is connected in parallel to both ends of the test capacitor. The tested reactor is connected in parallel with both ends of the voltage divider. An LC (inductance-capacitor) oscillation circuit consists of the test capacitor and the tested reactor. The detection device totally meets the requirements of all standards related to the reactor and is convenient to transport. By the detection device, a test can be carried out in a narrow space of a transformer substation. When the detection device is used for detecting turn-to-turn insulation of the dry reactor, data is more accurate, and thus, the turn-to-turn insulation condition of the dry reactor can be judged more accurately.

Description

A kind of light-duty dry reactor turn-to-turn insulation pick-up unit
Technical field
The utility model relates to insulation detection device, is a kind of light-duty dry reactor turn-to-turn insulation pick-up unit specifically.Described dry reactor refers to dry-type air-core reactor especially.
Background technology
In recent years, dry reactor is subjected to the welcome of countries in the world power department day by day because of it has many advantages that iron-core reactor and oil immersed type reactor do not possess, and is extensive use of in electric system.Data statistic analysis is found in the actual moving process, and the main cause that causes dry reactor to burn is the turn-to-turn insulation short trouble.Therefore, dry reactor manufacturing sector and operation department all attach great importance to this problem, a kind of equipment that can effectively detect dry reactor turn-to-turn insulation fault of an urgent demand development.
At present both at home and abroad the dry reactor site test is to measure its direct current resistance and power frequency reactance, and these two tests can not be found dry reactor winding inter-turn insulation damages or the situation that causes the turn-to-turn insulation short trouble such as aging.
Some units develop, have produced some dissimilar dry reactor turn-to-turn insulation failure detectors both at home and abroad at present, but its performance does not often reach the requirement of relevant criterion, mainly show not high enough to the requirement, the trial voltage that are not reached relevant criterion on the test dry reactor per second discharge time, do not reach the test findings of expection, experimental data is insincere, causes dry reactor turn-to-turn insulation situation to be out of one's reckoning easily; And and the testing equipment volume weight too big, be difficult to or can't enter electric substation's site test at all; More even in test realize all existing on the principle wrong (as patent 200520019122.1).
The utility model content
At the defective that exists in the prior art, the purpose of this utility model is to provide a kind of light-duty dry reactor turn-to-turn insulation pick-up unit, satisfy requirement fully about each standard of reactor, convenient transportation also can launch test at electric substation's small space, data were more accurate when the turn-to-turn insulation that is used for dry reactor detected, and can judge dry reactor turn-to-turn insulation situation more accurately.
For reaching above purpose, the technical scheme that the utility model is taked is:
A kind of light-duty dry reactor turn-to-turn insulation pick-up unit is characterized in that: comprise pressure regulator 1, the input end of pressure regulator 1 connects AC power AC and it is regulated, and the output terminal of pressure regulator 1 connects step-up transformer 2,
Output high-tension current after step-up transformer 2 boosts the AC power after the pressure regulation,
High-tension current is sent into multiplication of voltage tower 3 and is boosted to specified trial voltage by it, and described multiplication of voltage tower 3 is with the voltage regulation filtering function,
Step-up transformer 2 and multiplication of voltage tower 3 altogether,
Test capacitor 51 1 end ground connection, an other end current-limiting resistance 4 back of connecting is connected with multiplication of voltage tower 3,
Voltage divider 53 be parallel to test capacitor 51 two ends again after connecting in ball crack 52,
The tested reactor 6 of testing is connected in parallel on voltage divider 53 two ends,
Test capacitor 51 is formed the LC oscillation circuit with the tested reactor 6 of testing.
On the basis of technique scheme, described test capacitor 51 is noninductive impulse capacitor.
On the basis of technique scheme, described ball crack 52 is to have trigger pulse, ball crack that spacing is adjustable.
On the basis of technique scheme, described voltage divider 53 is the noninductive resistance voltage divider.
On the basis of technique scheme, described test capacitor 51, ball crack 52, voltage divider 53 are installed on the multiple bay 5.
On the basis of technique scheme, described step-up transformer 2 is the medium-high frequency transformer, or is Industrial Frequency Transformer.
Light-duty dry reactor turn-to-turn insulation pick-up unit described in the utility model, satisfy requirement fully about each standard of reactor, convenient transportation also can launch test at electric substation's small space, data were more accurate when the turn-to-turn insulation that is used for dry reactor detected, and can judge dry reactor turn-to-turn insulation situation more accurately.
Light-duty dry reactor turn-to-turn insulation pick-up unit described in the utility model has following advantage:
1, the utility model adopts step-up transformer output to boost through voltage-multiplying circuit again, and all the testing equipment of dry reactor turn-to-turn insulation detection more in the past is light and handy for its volume, weight, is easy to use in the electric substation; Step-up transformer adopts the medium-high frequency transformer, and its volume is lighter and handier than Industrial Frequency Transformer, and circuit capacitor capacity in the multiplication of voltage tower circuit of rear end, volume are also littler.
2, the utility model test capacitor 51, ball discharge crack 52, voltage divider 53 are installed on the multiple bay, compact conformation, convenient in carrying.
3, the utility model can continue to apply in one minute the inferior high voltagehigh frequency pulse that relevant criterion requires, the detection effect sensitivity of meeting in 6000 (or 7200) to dry reactor.
4, the utility model per second discharge time is adjustable, is applicable to the dry reactor under the different electric power frequencies such as 50Hz, 60Hz.
5, in the utility model, noninductive impulse capacitor capacity can be regulated according to the tested reactor capacity of testing, and the high voltagehigh frequency pulsed frequency that is produced meets the requirement of relevant criterion.
Description of drawings
The utility model has following accompanying drawing:
Fig. 1 theory diagram of the present utility model,
The elementary diagram of Fig. 2 the utility model embodiment,
The multiple bay of Fig. 3 the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
The utility model is the test unit that a kind of 6kV of being applicable to~35kV level dry-type air-core reactor turn-to-turn insulation detects, and satisfies the relevant criterion requirement, can test that reactor applies 2 times of power frequency number of times of per second, frequency is the high voltagehigh frequency oscillating impulse of tens kHz to tested.
As shown in Figure 1, 2, light-duty dry reactor turn-to-turn insulation pick-up unit described in the utility model comprises pressure regulator 1, and the input end of pressure regulator 1 connects AC power AC and it is regulated, and the output terminal of pressure regulator 1 connects step-up transformer 2,
Output high-tension current after step-up transformer 2 boosts the AC power after the pressure regulation,
High-tension current is sent into multiplication of voltage tower 3 and is boosted to specified trial voltage by it, and described multiplication of voltage tower 3 is with the voltage regulation filtering function,
Step-up transformer 2 and multiplication of voltage tower 3 altogether,
Test capacitor 51 1 end ground connection, an other end current-limiting resistance 4 back of connecting is connected with multiplication of voltage tower 3,
Voltage divider 53 be parallel to test capacitor 51 two ends again after connecting in ball crack 52,
The tested reactor 6 of testing is connected in parallel on voltage divider 53 two ends,
Test capacitor 51 is formed LC oscillation circuit, LC oscillatory circuit oscillation frequency tens kHz with the tested reactor 6 of testing;
Too much electric energy entered oscillation circuit when current-limiting resistance 4 was used to limit the discharging gap puncture, and made the ball crack reliably cease arc when the LC vibration finishes, and should be able to guarantee test capacitor 51 is charged to rated voltage.
Current-limiting resistance 4 preferred reactance values are greater than the current-limiting resistance of 5 megaohms, and the time constant that current-limiting resistance 4 cooperates with test capacitor 51 is 2~4ms.
On the basis of technique scheme, described test capacitor 51 is noninductive impulse capacitor.Test capacitor 51 can be made up of the noninductive impulse capacitor of several different electric capacitys, and the capacity of test capacitor 51 can be regulated to satisfy the requirement of test frequency according to the tested reactor capacity of testing.
On the basis of technique scheme, described ball crack 52 is to have trigger pulse, ball crack that spacing is adjustable, and discharging gap is realized the disruptive discharge of per second twice power frequency number of times by the ball crack that has trigger pulse.
On the basis of technique scheme, voltage divider 53 and ball crack 52, tested test reactor 6 be connected and read, access, analytical test waveform,
Described voltage divider 53 is the noninductive resistance voltage divider, and it is as test capacitor 51 and the tested damping resistance of testing the LC oscillation circuit of reactor 6 compositions, and decay finishes to guarantee to vibrate within a certain period of time by LC.
On the basis of technique scheme, as shown in Figure 3, described test capacitor 51, ball crack 52, voltage divider 53 are installed on the multiple bay 5, compact conformation.
On the basis of technique scheme, described step-up transformer 2 is the medium-high frequency transformer, or is Industrial Frequency Transformer.Adopt a whole set of test unit of medium-high frequency transformer lighter and handier.
The utility model course of work is as follows: input ac power is regulated by pressure regulator 1, step-up transformer 2 output AC high pressure, boost through multiplication of voltage tower 3, give test capacitor 51 chargings by current-limiting resistance 4 again, ball crack 52 punctures and tests reactor 6 discharges to tested then, by voltage divider 53 read, access and analytical test waveform.Among Fig. 1, boost through voltage-multiplying circuit 3 again after input ac power AC boosts by pressure regulator 1 adjusting, transformer 2 and export unipolarity high-tension current (high voltage direct current).Parameter control by to current-limiting resistance 4 and test capacitor 51 guarantees that test capacitor 51 charges to specified trial voltage 180kV in the time of the 9ms left and right sides; Regulate ball crack 52 spacings, make its 50% sparking voltage about 250kV, every the 52 internal trigger pulsed discharges of 10ms ball crack once, and then cause 52 disruptive discharges of ball crack, and realize that 51 pairs of tested reactors 6 of testing of test capacitor discharge, LC resonance begins, and in 1.5ms, after LC resonance finished, because the effect of current-limiting resistance 4,52 electric arcs in ball crack reliably extinguished.Test capacitor 51 charges to specified trial voltage again, and ball crack 52 punctures once more, new LC starting of oscillation ... so circulation is stopped until test.By voltage divider 53 read, access and analytical test waveform, for the usefulness of judging reactor turn-to-turn insulation situation.
The utility model principle of work is: continue to test to tested that reactor applies 2 times of power frequency number of times of per second, frequency is the higher-order of oscillation pulse of tens kHz in 1 minute, differentiate dry reactor turn-to-turn insulation by oscillation frequency, waveform attenuating time and whether have defective.With Fig. 2 is example: when using shown in Figure 2 light-duty dry reactor turn-to-turn insulation pick-up unit, pick-up unit applied 6000 (or 7200) sub-high pressure high-frequency impulse in lasting one minute to dry reactor, earlier dry reactor is applied lower voltage value, with the waveform of digital store voltage, electric current; Adjust the pressure regulator output voltage then, the multiplication of voltage tower boosts to specified trial voltage, applies one minute specified trial voltage by standard code, wave recording, and the test waveform under the more different voltage.Or the test waveform of waveform that this test is obtained and previous same dry reactor compares.Waveform is mainly relatively realized by oscillation frequency comparison, comparison die-away time, attenuation coefficient.If back time test waveform is higher than the oscillation frequency of waveform last time, die-away time is shorter, attenuation coefficient is bigger, promptly there is the turn-to-turn insulation defective in the decidable dry reactor.
The utility model can continue to apply 6000 or 7200 sub-high pressure high-frequency impulses in one minute to dry reactor, satisfy the relevant criterion requirement fully, compact conformation, build is light and handy, convenient transportation uses simply, detects sensitive, be applicable to the test of dry reactor producer and run unit thereof, be more suitable for the place limited and use in spaces such as electric substations.

Claims (6)

1. light-duty dry reactor turn-to-turn insulation pick-up unit is characterized in that: comprise pressure regulator (1), the input end of pressure regulator (1) connects AC power AC and to its adjusting, the output terminal of pressure regulator (1) connects step-up transformer (2),
Output high-tension current after step-up transformer (2) boosts the AC power after the pressure regulation,
High-tension current is sent into multiplication of voltage tower (3) and is boosted to specified trial voltage by it, and described multiplication of voltage tower (3) is with the voltage regulation filtering function,
Step-up transformer (2) and multiplication of voltage tower (3) altogether,
Test capacitor (51) one end ground connection, the other end are connected, and a current-limiting resistance (4) is back to be connected with multiplication of voltage tower (3),
Voltage divider (53) be parallel to test capacitor (51) two ends again after connect ball crack (52),
The tested reactor (6) of testing is connected in parallel on voltage divider (53) two ends,
Test capacitor (51) is formed the LC oscillation circuit with the tested reactor (6) of testing.
2. light-duty dry reactor turn-to-turn insulation pick-up unit as claimed in claim 1 is characterized in that: described test capacitor (51) is noninductive impulse capacitor.
3. light-duty dry reactor turn-to-turn insulation pick-up unit as claimed in claim 1 is characterized in that: described ball crack (52) is to have trigger pulse, ball crack that spacing is adjustable.
4. light-duty dry reactor turn-to-turn insulation pick-up unit as claimed in claim 1 is characterized in that: described voltage divider (53) is the noninductive resistance voltage divider.
5. light-duty dry reactor turn-to-turn insulation pick-up unit as claimed in claim 1 is characterized in that: described test capacitor (51), ball crack (52), voltage divider (53) are installed on the multiple bay (5).
6. light-duty dry reactor turn-to-turn insulation pick-up unit as claimed in claim 1, it is characterized in that: described step-up transformer (2) is the medium-high frequency transformer, or is Industrial Frequency Transformer.
CN2010205929952U 2010-11-05 2010-11-05 Turn-to-turn insulation detection device for light dry reactor CN201965195U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102520311A (en) * 2012-01-10 2012-06-27 广东电网公司电力科学研究院 Method for locating turn-to-turn insulation defects of dry type air-core reactor
CN102570390A (en) * 2012-03-07 2012-07-11 华北电网有限公司唐山供电公司 On-line monitoring and protecting device for series reactor
CN102590699A (en) * 2012-01-10 2012-07-18 广东电网公司电力科学研究院 Method for positioning inter-turn insulation defect of dry hollow reactor
CN103472372A (en) * 2013-08-23 2013-12-25 武汉欣泰宇电力电子科技有限公司 Novel device for detecting turn-to-turn insulation of dry-type hollow electric reactor
CN104464464A (en) * 2014-12-15 2015-03-25 广东电网有限责任公司电力科学研究院 Arc generation device working on basis of parallel resonance mode
CN104515941A (en) * 2014-12-24 2015-04-15 国家电网公司 Electric reactor turn-insulating detection device based on pulse oscillation principle
CN105223532A (en) * 2015-10-27 2016-01-06 西安交通大学 A kind of method for diagnosing faults of dry reactor higher-order of oscillation impulse voltage withstand test
CN105223484A (en) * 2015-10-27 2016-01-06 西安交通大学 A kind of dry reactor higher-order of oscillation impulse voltage endurance test method and system thereof
CN106226661A (en) * 2016-07-17 2016-12-14 珠海蓝瑞盟电气有限公司 Use detection structure and the method for succusion detection reactor turn-to-turn insulation fault

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102520311A (en) * 2012-01-10 2012-06-27 广东电网公司电力科学研究院 Method for locating turn-to-turn insulation defects of dry type air-core reactor
CN102590699A (en) * 2012-01-10 2012-07-18 广东电网公司电力科学研究院 Method for positioning inter-turn insulation defect of dry hollow reactor
CN102590699B (en) * 2012-01-10 2014-05-28 广东电网公司电力科学研究院 Method for positioning inter-turn insulation defect of dry hollow reactor
CN102570390A (en) * 2012-03-07 2012-07-11 华北电网有限公司唐山供电公司 On-line monitoring and protecting device for series reactor
CN103472372A (en) * 2013-08-23 2013-12-25 武汉欣泰宇电力电子科技有限公司 Novel device for detecting turn-to-turn insulation of dry-type hollow electric reactor
CN104464464A (en) * 2014-12-15 2015-03-25 广东电网有限责任公司电力科学研究院 Arc generation device working on basis of parallel resonance mode
CN104515941A (en) * 2014-12-24 2015-04-15 国家电网公司 Electric reactor turn-insulating detection device based on pulse oscillation principle
CN105223532A (en) * 2015-10-27 2016-01-06 西安交通大学 A kind of method for diagnosing faults of dry reactor higher-order of oscillation impulse voltage withstand test
CN105223484A (en) * 2015-10-27 2016-01-06 西安交通大学 A kind of dry reactor higher-order of oscillation impulse voltage endurance test method and system thereof
CN105223532B (en) * 2015-10-27 2018-06-29 西安交通大学 A kind of method for diagnosing faults of dry reactor higher-order of oscillation impulse withstand voltage experiment
CN106226661A (en) * 2016-07-17 2016-12-14 珠海蓝瑞盟电气有限公司 Use detection structure and the method for succusion detection reactor turn-to-turn insulation fault

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Granted publication date: 20110907

Termination date: 20111105