CN202948103U - Converter transformer externally applied AC voltage tolerance test line with diagnosis function - Google Patents
Converter transformer externally applied AC voltage tolerance test line with diagnosis function Download PDFInfo
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- CN202948103U CN202948103U CN 201220718875 CN201220718875U CN202948103U CN 202948103 U CN202948103 U CN 202948103U CN 201220718875 CN201220718875 CN 201220718875 CN 201220718875 U CN201220718875 U CN 201220718875U CN 202948103 U CN202948103 U CN 202948103U
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- transformer
- power transformer
- resistance test
- converter power
- alternating voltage
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Abstract
The present utility model relates to a converter transformer externally applied AC voltage tolerance test line with a diagnosis function, and the line belongs to the transformer test equipment technology field. The line comprises a power frequency test power supply (1), a power frequency measuring voltage divider (2), a voltage sharing device (3), a partial discharge measuring system and a tested converter transformer (4), the power frequency test power supply (1), the power frequency measuring voltage divider (2) and the voltage sharing device (3) are successively connected, and head and tail sleeves of a winding of a valve side of the tested converter transformer (4) are all connected with the voltage sharing device (3). By adopting the test line, converter transformer externally applied AC voltage tolerance tests can be completed, and tested discharge signals can be analyzed and judged during the testing process.
Description
Technical field
The utility model relates to the converter power transformer with diagnostic function and executes alternating voltage resistance test circuit outward, belongs to the apparatus for testing transformer technical field.
Background technology
Converter power transformer is a kind of important direct current transportation equipment, and it has net side winding and valve side winding, and net side winding connects AC power system, and valve side winding stretches into the valve Room and is connected with rectifying valve.
Regulation according to national standard " GB/T18494.2-2007 convertor transformer second portion: D.C. high voltage transmission converter power transformer ", converter power transformer will stand the examination of multinomial Insulation Test project before manufacturing plant dispatches from the factory, executing the alternating voltage resistance test outward is exactly one of them, is the customary Insulation Test project of valve winding in converter transformer.The converter power transformer Insulation Test sequentially is generally: switching impulse test, lightning impulse test, outward execute DC voltage resistance test, DC voltage reversal of poles test, execute alternating voltage resistance test, induced voltage test outward.
For executing alternating voltage resistance test circuit outward, standard is pointed out: execute the alternating voltage resistance test outward and adopt 50Hz or 60Hz frequency of operation, voltage is applied on each winding that each connecting terminals of valve side winding is connected together, the equal ground connection of all non-tested terminals, duration of test runs is 1 hour, measure partial discharge quantity during applying voltage, the partial discharge quantity maximal value of permission should be no more than 500pC.When product contract requires lower than the 500pC value, the execution contract.
At present, domestic each converter power transformer manufacturing plant carries out the outer alternating voltage resistance test of executing according to standard-required, but in this process of the test, the partial discharge quantity that often occurs recording does not meet the demands or other defective situations, in such cases, test method and test circuit that other are sought with regard to needs by testing department further test to analyze the defective problem of judgement, repair for product present one's view or advise.
The utility model content
The utility model purpose is to provide the converter power transformer with diagnostic function and executes alternating voltage resistance test circuit outward, all connect the measurement of partial discharge impedance by the testing terminal at valve side winding head and the tail sleeve pipe, relatively reach accordance with the mutual transitive relation of square wave by two discharge values, can analyze inside pipe casing discharge or transformer internal discharge, can judge that for the transformer internal discharge discharge position near which termination of winding, solves the problems referred to above that exist in background technology.
The technical solution of the utility model is: the converter power transformer with diagnostic function is executed alternating voltage resistance test circuit outward, comprise industrial frequency experiment power supply, power frequency measurement voltage divider, pressure-equalizing device, Partial Discharge Measurement System and tested converter power transformer, described industrial frequency experiment power supply, power frequency measurement voltage divider are connected with pressure-equalizing device and are connected, and tested valve winding in converter transformer head and the tail sleeve pipe and pressure-equalizing device are connected to each other.
Described industrial frequency experiment power supply is series resonance system or single-phase testing transformer, and output current generally is not less than 6A.
Described power frequency is measured voltage divider and is comprised plural measurement intrinsic standoff ratio.
Described pressure-equalizing device comprises balance pipe and equal pressure cap.
Described Partial Discharge Measurement System comprises plural measurement passage.
The beneficial effects of the utility model are: utilize this test circuit both can complete converter power transformer and execute the alternating voltage resistance test outward, can analyze judgement to the discharge signal that records in process of the test again.
Description of drawings
Fig. 1 is structural drawing of the present utility model;
In figure: industrial frequency experiment power supply 1, power frequency are measured voltage divider 2, pressure-equalizing device 3, tested converter power transformer 4.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is described further.
Converter power transformer with diagnostic function is executed alternating voltage resistance test circuit outward, comprise industrial frequency experiment power supply 1, power frequency measurement voltage divider 2, pressure-equalizing device 3, Partial Discharge Measurement System and tested converter power transformer 4, described industrial frequency experiment power supply 1, power frequency are measured voltage divider 2 and are connected with pressure-equalizing device and connect successively, and tested converter power transformer 4 valve side windings head and the tail sleeve pipes and pressure-equalizing device 3 are connected to each other.
Described industrial frequency experiment power supply 1 is series resonance system or single-phase testing transformer, and output current generally is not less than 6A, and output voltage satisfies testing requirements and has certain nargin.Series resonance system should have adjustable inductance, to coordinate the needs of different test product capacitances.Single-phase testing transformer should close use with other testing transformer and industrial frequency generator assembly, at single-phase testing transformer low-pressure side suitable reactor in parallel so that the compensation capacity current.
Described power frequency is measured voltage divider 2 and is comprised plural measurement intrinsic standoff ratio, and to satisfy the measurement needs of different tests voltage, its power-frequency voltage level also will satisfy the trial voltage requirement.
Described pressure-equalizing device 3 comprises balance pipe and equal pressure cap, has certain radius, can not produce corona under trial voltage.
Described Partial Discharge Measurement System comprises plural measurement passage, can be that the broadband measurement system also can be the narrow-band measuring system, has storage, playback function.
At the trial, trial voltage puts on a terminal of valve side winding, and another terminal is unsettled, the equal ground connection of all non-tested winding terminals, and the testing terminal of valve side winding head and the tail sleeve pipe all connects the measurement of partial discharge impedance.
Before test powers up, proofread and correct carrying out respectively square wave between head and the tail sleeve pipe termination and ground, record the mutual transitive relation of two ends.To injecting respectively square wave between head and the tail sleeve pipe termination and test on bushing terminal, the mutual transitive relation of square wave between record head and the tail sleeve pipe termination and test on bushing terminal.
Continuous monitoring head and the tail two ends discharge capacity in process of the test, relatively reach accordance with the mutual transitive relation of square wave by two discharge values, can analyze inside pipe casing discharge or transformer internal discharge, can judge for the transformer internal discharge discharge position is near which termination of winding.
Claims (5)
1. the converter power transformer that has diagnostic function is executed alternating voltage resistance test circuit outward, it is characterized in that: comprise industrial frequency experiment power supply (1), power frequency measurement voltage divider (2), pressure-equalizing device (3), Partial Discharge Measurement System and tested converter power transformer (4), described industrial frequency experiment power supply (1), power frequency measurement voltage divider (2) are connected 3 with pressure-equalizing device) connect successively, tested converter power transformer (4) valve side winding head and the tail sleeve pipe and pressure-equalizing device (3) are connected to each other.
2. the converter power transformer with diagnostic function as claimed in claim 1 is executed alternating voltage resistance test circuit outward, it is characterized in that: described industrial frequency experiment power supply (1) is series resonance system or single-phase testing transformer, and output current is not less than 6A.
3. the converter power transformer with diagnostic function as claimed in claim 1 is executed alternating voltage resistance test circuit outward, it is characterized in that: described power frequency is measured voltage divider (2) and is comprised plural measurement intrinsic standoff ratio.
4. the converter power transformer with diagnostic function as claimed in claim 1 is executed alternating voltage resistance test circuit outward, it is characterized in that: described pressure-equalizing device (3) comprises balance pipe and equal pressure cap.
5. the converter power transformer with diagnostic function as claimed in claim 1 is executed alternating voltage resistance test circuit outward, it is characterized in that: described Partial Discharge Measurement System comprises plural measurement passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220718875 CN202948103U (en) | 2012-12-24 | 2012-12-24 | Converter transformer externally applied AC voltage tolerance test line with diagnosis function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220718875 CN202948103U (en) | 2012-12-24 | 2012-12-24 | Converter transformer externally applied AC voltage tolerance test line with diagnosis function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202948103U true CN202948103U (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220718875 Expired - Lifetime CN202948103U (en) | 2012-12-24 | 2012-12-24 | Converter transformer externally applied AC voltage tolerance test line with diagnosis function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202948103U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837783A (en) * | 2014-03-27 | 2014-06-04 | 山东电力设备有限公司 | Direct current kickback method for shortening discharge time of converter transformer direct current test |
-
2012
- 2012-12-24 CN CN 201220718875 patent/CN202948103U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837783A (en) * | 2014-03-27 | 2014-06-04 | 山东电力设备有限公司 | Direct current kickback method for shortening discharge time of converter transformer direct current test |
| CN103837783B (en) * | 2014-03-27 | 2016-07-13 | 山东电力设备有限公司 | A kind of direct current recoil method shortening converter power transformer DC experiment discharge time |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130522 |