CN201364377Y - Transformer on-load tap changer operating characteristic AC tester - Google Patents
Transformer on-load tap changer operating characteristic AC tester Download PDFInfo
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- CN201364377Y CN201364377Y CNU2009200928626U CN200920092862U CN201364377Y CN 201364377 Y CN201364377 Y CN 201364377Y CN U2009200928626 U CNU2009200928626 U CN U2009200928626U CN 200920092862 U CN200920092862 U CN 200920092862U CN 201364377 Y CN201364377 Y CN 201364377Y
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- 238000012360 testing method Methods 0.000 claims abstract description 66
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Abstract
The utility model relates to a transformer on-load tap changer operating characteristic AC tester, belonging to testing equipment. A power supply source switch is connected with an internal power source module which is connected with a control switch together with an external power source interface. The control switch is connected with the interface under testing of an on-load voltage regulating switch, which is connected with a voltage and current sensor. The voltage and current sensor is connected with an acquisition board which is connected with a host processor, and the host processor is connected with a printer, a memorizer and a display. The transformer on-load tap changer operating characteristic AC tester has the advantages that the tester has wide application range and can test the operating characteristics of tap changers of a single-phase transformer and a reactor and can provide an intermediate tap-changer testing mode for special transformers such as a rectifier transformer; and when the transformer tap changer works under AC operating mode, the tester can test the operating status closest to the actual status through AC testing method.
Description
Technical field
The utility model belongs to the transformer high-voltage test unit.
Background technology
For provide quality of voltage qualified electric power energy to power consumer, China brings into use ULTC from the later stage 80 year last century at electrical network.To the year ends 2004, national power supply network ULTC has accounted for more than 60% of transformer sum, and rural power grid is also brought into use ULTC, and the accident that the thing followed causes because of on-load tap changers of transformers leaps to the 3rd of Accident of Transformer.These accidents cause electrical network main equipment-transformer scaling loss.The on-load tap changers of transformers burning damage accident causes transformer badly damaged, the rehabilitation expense height, and the accident treatment time is long, has a strong impact on power supply reliability, is listed in electric system and prevents one of key content of substantial equipment damage accident.China brings into use DC test transformer belt winding load ratio bridging switch acting characteristic (following on-load tap changers of transformers acting characteristic test all refer to carry out with Transformer Winding test) from eighties of last century beginning of the nineties in electric system, and the production instrumentation, but have following problem in using:
The not uniqueness of on-load tap changers of transformers DC test wave analysis.The waveform that is obtained with the DC test on-load tap changers of transformers, the no level of waveform, interrupted and jump often appear, site test personnel do not have according to waveform is analyzed, judge the state of the art of switch motion process, waveform have to be faxed to testing apparatus manufacturer, provide with reference to conclusion by it.And mostly the reference conclusion that producer provides is equivocal or suggestive suggestion, to this on-the-spot test personnel and not exclusively approval.At present domestic also do not have the technical specialist to provide authoritative conclusion accurately to DC test and all kinds of unusual waveforms.
The band winding carries out on-load tap changers of transformers DC test waveform and departs from bigger with the waveform of not testing with winding that is obtained, testing crew all dependence experiences generally speaking requires transformer production factory, switch factory switch to be hung out contact is polished, to obtain ideal waveform.The technician of producer is difficult to confirm that switch does not have defective, can only polish to switch contact.This comes down to the destruction to the switch contact surface of contact, causes the excessive scaling loss of switch contact in service.Many years of experience confirms that the scene hangs out the most no quality problems of load ratio bridging switch of processing.Because this type of incident is too much, site test personnel are not unique according to the stroking technique state of judging switch with the DC test waveform, problem is summed up in the point that " because oil film effect DC test waveform is unusual ", allowance puts transformer into operation by having to carry, this causes existing the shunting switch of defective to put into operation.
The unusual transformer of some DC test load ratio bridging switch acting characteristic waveforms is transformed into the operation of No-load changer transformer by test personnel suggestion.Our province has many such transformers at network operation at present, and the one, the waste of resource, the 2nd, influence the quality of voltage control of system.
The on-load tap changers of transformers acting characteristic waveform that DC test obtained, with not with the model waveform of winding DC test conform to fully on-the-spot actually rare.Because the scene can't conclusion, there is not authority to assert, some units refusals of bearing commissioning test carry out the test of on-load tap changers of transformers acting characteristic with direct current.
On-load tap changers of transformers is carried out the restriction that DC test is subjected to conditions such as transformer junction style, group, and the ULTC DC test instrument of some standard junction styles can not be tested.As neutral point do not have the transformer of drawing, Δ tie lines transformer, at the rectifier transformer of secondary pressure regulation, single-phase voltage regulating transformer etc.This type of ULTC can only not done shunting switch test, directly input coefficient.
Domestic recent design of transformer manufacturing industry inner screening continous way coiling The application of new technique, transformer electric capacity distributes more even, and the electric capacity of winding increases, and it is bigger that the DC test on-load tap changers of transformers obtains different wave shape.
Transformer, load ratio bridging switch manufacturer are not approved waveform and conclusion that DC test obtained, and the DC test method is not admitted yet, and whatsoever the waveform of sample is all answered switch and do not had quality problems, and promise to undertake quality assurance.The test waveform that is obtained artificially defective being set, what switch manufacturer was also very sure offers a negation.Technical method, the conclusion of foreign technology bound pair DC test on-load tap changers of transformers are not admitted.
Though the method for DC test on-load tap changers of transformers acting characteristic has been used the more than ten years in China, but still do not include in country, industry standard such as the method for on-load tap changers of transformers DC test, defective basis for estimation.
Summary of the invention
The utility model provides a kind of AC test device for transformer on-load tap-changer operating characteristic, carries out on-load tap changers of transformers DC test waveform with not uniqueness, the band winding that solves on-load tap changers of transformers DC test wave analysis and departs from the problem that ULTC DC test instrument big, some standard junction styles can not be tested with the waveform of not testing with winding that is obtained.The technical scheme that the utility model is taked is:
The power supply switch is connected with the internal electric source module, this internal electric source module is connected with gauge tap respectively with the external power source interface, this gauge tap is connected with the tested interface of on-load voltage regulating switch, the tested interface of this on-load voltage regulating switch is connected with voltage-current sensor, this voltage-current sensor is connected with collection plate, this collection plate is connected with primary processor, this primary processor and printer, and storer is connected with display.
Principle of work: use single-phase 220V power supply as working power, single phase poaer supply is transformed to three-phase 400V code test power supply, deliver to the transformer that needs test, high-precision sensor is to the test current of output, voltage, phase angle is made high speed acquisition, be transferred to message processing module, message processing module compares the Back ground Information amount of these quantity of information and self real-time update, the transition point of capture assay system, deposit the information in the certain limit before and after it in registration card, and on screen, showing partial waveform for the testing crew diagnosis, device provides software that the information of record is further analyzed processing according to requirement of engineering.
Advantage of the present utility model is:
The high pressure winding is carried out the test of shunting switch acting characteristic at all other transformers of tie lines level of primary side, secondary side, comprise that Y tie lines neutral point is not drawn, Δ tie lines transformer, the scope of application is extensive;
Single transformer, reactor shunting switch acting characteristic are tested, and existing direct current method can not be tested it;
To some special transformer, provide indirect shunting switch test pattern as rectifier transformer;
Sub-connecting switch of transformer is operated under the AC Condition, and AC method is tested near actual operating mode;
Adopt small echo changing method capturing motion process quick and precisely, not test leakage;
The Time-Frequency Analysis Method of back-end data is provided, and further deepens interpretation software;
Convenient on-the-spot use of AC-DC-3AC testing power supply adopts the stronger industrial frequency noise of avoiding of frequency conversion output to disturb;
The parsing of test result is unique, and the conclusion of being made has sanction property eventually.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is the theory diagram of internal electric source module.
Fig. 3 is a gauge tap button processing section schematic diagram.
Fig. 4 is the utility model primary control program process flow diagram.
Fig. 5 is each experimental technique process flow diagram in the utility model primary control program.
Fig. 6 analyzes the degree process flow diagram in the utility model primary control program.
Embodiment
The power supply switch is connected with the internal electric source module, this internal electric source module is connected with gauge tap respectively with the external power source interface, this gauge tap is connected with the tested interface of on-load voltage regulating switch, the tested interface of this on-load voltage regulating switch is connected with voltage-current sensor, this voltage-current sensor is connected with collection plate, this collection plate is connected with primary processor, this primary processor and printer, and storer is connected with display.
The power supply switch: it is the main switch of device power supply, and it gives the internal power supply module, and host power supply and fan provide 220VAC power supply.
The internal electric source module: the power module function is to finish the AC-DC-3AC process of single-phase AC, the frequency conversion scope of 50 ± 5Hz can be provided, be the standard testing power supply, power is 300-1500W, its theory diagram is seen Fig. 2, wherein 3AC represents to differ 120 ° three-phase alternating current, and the 3AC transformer boosts, and the 3AC passive filter will be harmful to high frequency and remove.
The external power source interface: this device provides and uses the power autonomous input interface of user, is respectively voltage measurement interface and current measurement interface.
Gauge tap: it is a manual bidirectional switch gearing switch, still is the machine external power by switching selection employing internal power supply, then gives inverter power supply as selecting internal power supply.Control elements such as gauge tap is in the realization machine, switchings of machine external power safety, internal power supply start and stop, frequency adjustment, and different tests method sensor switches, acquisition channel is shared.The film key section processes is handled by special circuit board, and the 0C gate circuit drives the relay part and digital I/O part is integrated with the signal condition pcb board, and the indication of manual bidirectional switch gearing can clearly show test method and trystate.Button processing section principle is seen Fig. 3.
The tested interface of on-load voltage regulating switch: provide the wiring interface of multiple test method to connect sensor and equipment under test, need select to use distinct interface according to on-site actual situations.
Voltage-current sensor: use the high-precision alternating voltage current sensor of different ranges, sensor is the isolated form sensor.
Collection plate: select the high-speed synchronous multichannel collecting for use, synchronous acquisition is eliminated and is postponed; It is poor to reduce between interchannel collection, adopts synchronous acquisition plate, isolated form sensor, and needs based on high speed acquisition, and the every passage 200k of per second uses dual power supply to follow the tracks of power supply, combine with the filtering pcb board, and the filtering circuit that matches.
Primary processor: the CPU model is the 2.4G dominant frequency, the industrial master control integrated circuit board of internal memory 2G.Be responsible for data acquisition, analyze, show, print, the management and running of storage supervisor.
Software section
This device software is 1 primary control program, 4 kinds of collecting test handling procedures and 1 specialty analysis program (seeing Fig. 4, Fig. 5).But specialty analysis program off-line operation is analyzed the test data in-depth that the scene obtains for the professional, sees Fig. 6.These programs have following unique aspect in innovation and function design:
The state parameter self-learning function.Need to calculate in real time phase place in the test and differ, initial parameter accurately is provided.Program design self-built, upgrade the benchmark function automatically, instrument obtains the voltage, electric current, frequency, phase data of the test basic parameter as test automatically before each test, compare with dynamic real-time parameter in the switch motion process, it is few that test triggers the blind area, improve the reliability that test triggers greatly, and shortened test period.
Adopt the small echo changing method to analyze data, specifically choose the Mallat formula, can analyze the useful information that original signal is carried, and can resolve its process.
This device adopts Color Liquid Crystal Display, and real-time curve is walked screen fast, true reflection test change procedure.
Internal memory compression memory technology, the pre-trigger recording degree of depth can reach maximum 800 the cycle degree of depth of 8 passages, for data analysis provides abundant source book.
Claims (1)
1, a kind of AC test device for transformer on-load tap-changer operating characteristic, it is characterized in that: the power supply switch is connected with the internal electric source module, this internal electric source module is connected with gauge tap respectively with the external power source interface, this gauge tap is connected with the tested interface of on-load voltage regulating switch, the tested interface of this on-load voltage regulating switch is connected with voltage-current sensor, this voltage-current sensor is connected with collection plate, this collection plate is connected with primary processor, this primary processor and printer, storer is connected with display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200928626U CN201364377Y (en) | 2009-01-14 | 2009-01-14 | Transformer on-load tap changer operating characteristic AC tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200928626U CN201364377Y (en) | 2009-01-14 | 2009-01-14 | Transformer on-load tap changer operating characteristic AC tester |
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| CN201364377Y true CN201364377Y (en) | 2009-12-16 |
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| CNU2009200928626U Expired - Lifetime CN201364377Y (en) | 2009-01-14 | 2009-01-14 | Transformer on-load tap changer operating characteristic AC tester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458308B (en) * | 2009-01-14 | 2011-05-11 | 吉林省电力有限公司电力科学研究院 | AC test device for transformer on-load tap-changer operating characteristic |
| CN110907819A (en) * | 2019-12-30 | 2020-03-24 | 国网江苏省电力有限公司检修分公司 | Device and method for testing operating characteristics of on-load tap changer of triangular wiring transformer |
-
2009
- 2009-01-14 CN CNU2009200928626U patent/CN201364377Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458308B (en) * | 2009-01-14 | 2011-05-11 | 吉林省电力有限公司电力科学研究院 | AC test device for transformer on-load tap-changer operating characteristic |
| CN110907819A (en) * | 2019-12-30 | 2020-03-24 | 国网江苏省电力有限公司检修分公司 | Device and method for testing operating characteristics of on-load tap changer of triangular wiring transformer |
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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: JILIN PROV. POWER SCIENCE INST. CO., LTD. STATE EL Free format text: FORMER OWNER: JILIN PROV. POWER SCIENCE INST. CO., LTD. Effective date: 20120828 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120828 Address after: 130021 Jilin City, Changchun province people's street, No. 4433 Co-patentee after: Jilin Academy of Electric Power Science Patentee after: Electric Power Research Institute of Jilin Electric Power Company Co-patentee after: State Grid Corporation of China Address before: 130021 Jilin City, Changchun province people's street, No. 4433 Co-patentee before: Jilin Academy of Electric Power Science Patentee before: Electric Power Research Institute of Jilin Electric Power Company |
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| CX01 | Expiry of patent term |
Granted publication date: 20091216 |
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| CX01 | Expiry of patent term |