CN204405793U - AC extra high voltage main transformer modulation associating partial discharge test system - Google Patents
AC extra high voltage main transformer modulation associating partial discharge test system Download PDFInfo
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- CN204405793U CN204405793U CN201520137852.5U CN201520137852U CN204405793U CN 204405793 U CN204405793 U CN 204405793U CN 201520137852 U CN201520137852 U CN 201520137852U CN 204405793 U CN204405793 U CN 204405793U
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Abstract
The utility model provides a kind of AC extra high voltage main transformer modulation to combine partial discharge test system, comprise variable-frequency power sources, testing transformer, compensation reactor, capacitive divider, partial discharge detecting system, and regulating compensation transformer and AC extra high voltage main body transformer, the output terminal of variable-frequency power sources is connected with the low-pressure side of testing transformer, the high-pressure side of testing transformer is connected with the low-pressure side of regulating compensation transformer, the high-pressure side of regulating compensation transformer is connected with the low-pressure side of AC extra high voltage main body transformer, shunt compensation reactor and capacitive divider between testing transformer and regulating compensation transformer, AC extra high voltage main body transformer and regulating compensation transformer are all equipped with partial discharge detecting system.The utility model AC extra high voltage main transformer and modulation Partial Discharge Testing on Site can once complete, and test routine is greatly simplified; The electrical cable that during test, AC extra high voltage main transformer and regulating compensation become need not be removed, and reduces work on the spot amount, improves work efficiency.
Description
Technical field
The utility model relates to Power Transformer in Field experimental technique field, specifically a kind of AC extra high voltage main transformer modulation associating partial discharge test system.
Background technology
1000kV AC extra high voltage power transmission engineering is the ac transmission engineering that electric pressure is the highest in the world at present, along with southeast Shanxi-Nanyang-Jingmen UHVAC demonstration project and extension project, Wan electricity Dong send in succession putting into operation of Huainan-Shanghai AC extra high voltage power transmission engineering, AC extra high voltage presents rapid growth momentum in China.
AC extra high voltage transformer is one of AC extra high voltage power transmission engineering the most expensive most important equipment.In order to ensure transformer production, installation quality, searching the hidden danger of Transformer, needing to carry out transformer handing-over and prerun test at the scene.For AC extra high voltage transformer, be that difficulty is maximum, examination is the strictest with induced over voltage withstand test (ACLD, usually referred to as partial discharge test) during measurement of partial discharge long, to one of the sensitiveest handing-over prerun test of inside transformer insulation defect reflection.
The body of extra-high voltage transformer and regulating compensation part branch mailbox, because electric pressure is high, size large, for the ease of transport, are arranged, are main body transformer and regulating compensation transformer by extra-high voltage transformer.
At present, the general AC extra high voltage partial discharge of transformer measuring method of China carries out measurement of partial discharge to main body transformer and regulating compensation transformer respectively, and this measuring method mainly exists following problem:
1) the transformer insulated examination of regulating compensation is inadequate.
2) need the connecting line of dismounting, reduction main transformer modulation, workload is large.
3) to twice local discharge test be carried out, need that testing equipment is many, efficiency is low.
Given this, set about have developed AC extra high voltage main transformer modulation associating partial discharge test method and test unit.
Utility model content
The purpose of this utility model is to overcome the blank and deficiency that prior art exists, providing a kind of AC extra high voltage main transformer modulation to combine partial discharge test system, make test routine greatly simplify, reduce work on the spot amount, increase work efficiency.
The utility model adopts following technical scheme:
A kind of AC extra high voltage main transformer modulation associating partial discharge test system, comprise variable-frequency power sources, testing transformer, compensation reactor, capacitive divider, partial discharge detecting system, and subjects regulating compensation transformer and AC extra high voltage main body transformer, the output terminal of variable-frequency power sources is connected with the low-pressure side of testing transformer, the high-pressure side of testing transformer is connected with the low-pressure side of regulating compensation transformer, the high-pressure side of regulating compensation transformer is connected with the low-pressure side of AC extra high voltage main body transformer, the compensation reactor for compensating perceptual capacity and the capacitive divider for measuring is parallel with between testing transformer and regulating compensation transformer, AC extra high voltage main body transformer and regulating compensation transformer are all equipped with partial discharge detecting system.
The technical solution of the utility model has following beneficial effect:
1, achieve AC extra high voltage main transformer modulation associating Partial Discharge Testing on Site at home and abroad first, be applicable to domestic all AC extra high voltage transformer field partial discharge tests;
2, AC extra high voltage main transformer and regulating compensation change Partial Discharge Testing on Site once complete, and test routine is greatly simplified, improves work efficiency;
3, during the independent local discharge test of AC extra high voltage main transformer, low-pressure side precharge is generally 173.2kV; Body becomes and modulation associating local discharge test, due to two-stage boosting, only need exchange and become tap-changing windings applying voltage 45.6kV (for station, Jingmen AC extra high voltage transformer), therefore testing equipment output voltage drops to 45.6kV from 173.2kV, thus trial voltage is more prone to, the testing equipment such as variable-frequency power sources, compensation reactor is greatly simplified, has saved experimentation cost;
4, match to examine with the insulation of AC extra high voltage main transformer, regulating compensation become apply voltage comparatively its routine tests time greatly increase, and increase the insulation examination dynamics of modulation, make the insulation of modulation examine science and comprehensively more;
5, the electrical cable that during test, AC extra high voltage main transformer and regulating compensation become need not be removed, and reduces work on the spot amount, improves work efficiency.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of the utility model AC extra high voltage main transformer modulation associating partial discharge test system;
Fig. 2 is the utility model partial discharge test pressurization protocols schematic diagram.
Wherein: 1-variable-frequency power sources; 2-testing transformer; 3-compensation reactor; 4-capacitive divider; 5-partial discharge detecting system; 6-regulating compensation transformer; 7-AC extra high voltage main body transformer.
Embodiment
Below in conjunction with the accompanying drawing in the utility model, the technical scheme in the utility model is clearly and completely described.
Refer to Fig. 1, the utility model AC extra high voltage main transformer modulation associating partial discharge test system comprises variable-frequency power sources 1, testing transformer 2, compensation reactor 3, capacitive divider 4, partial discharge detecting system 5, and subjects regulating compensation transformer 6 and AC extra high voltage main body transformer 7, wherein the output terminal of variable-frequency power sources 1 is connected with the low-pressure side of testing transformer 2, the high-pressure side of testing transformer 2 is connected with the low-pressure side of regulating compensation transformer 6, the high-pressure side of regulating compensation transformer 6 is connected with the low-pressure side of AC extra high voltage main body transformer 7, the compensation reactor 3 for compensating perceptual capacity and the capacitive divider 4 for measuring is parallel with between testing transformer 2 and regulating compensation transformer 6, AC extra high voltage main body transformer 7 and regulating compensation transformer 6 are all equipped with partial discharge detecting system 5, concrete, in AC extra high voltage main body transformer 7 high-pressure side, medium voltage side, partial discharge detecting system 5 is installed at low-pressure side and bottom shielding of bushing place, four, regulating compensation transformer 6 high-pressure side respectively.
AC extra high voltage main transformer modulation associating local discharge test adopts variable-frequency power sources 1 to supply testing transformer 2 low-pressure side, testing transformer 2 high-pressure side applies trial voltage to modulation (regulating compensation transformer 6) low-pressure side, and the effect of testing transformer 2 is that the voltage exported is elevated to modulation low-pressure side trial voltage 45.6kV.Modulation high-pressure side is that body becomes (AC extra high voltage main body transformer 7) low-pressure side voltage supply, and the excitation voltage of AC extra high voltage main body transformer 7 local discharge test is reached
The measuring voltage of local discharge test reaches
The parameter of the testing equipment such as variable-frequency power sources 1, testing transformer 2 is determined according to above-mentioned voltage.
Each parameters of operating part:
1, variable-frequency power sources 1
Power supply inputs: 380 (1 ± 10%) V, three-phase, 50Hz;
Output voltage: 0 ~ 350V, single-phase, continuously adjustabe;
Output power: 2 × 400kW
Operating frequency range: 30Hz ~ 300Hz;
Frequency adjustment resolution: 0.1Hz;
Output waveform aberration rate :≤1.0%;
Output voltage instability :≤1.0%;
Partial discharge quantity :≤50pC.
2, testing transformer 2
Rated capacity: >=600kVA;
Rated voltage: 60/0.4kV or 55/0.35kV;
Rated frequency: 100Hz;
The number of phases: single-phase;
Polarity: I, I0;
Partial discharge quantity: under rated voltage, the partial discharge quantity≤50pC of HV Terminal.
3, compensation reactor 3
Rated voltage: 50kV;
Rated current: >=60A;
Rated frequency: 100Hz;
Saturation characteristic: when 0% ~ 100% rated voltage, its volt-ampere characteristic is linear;
Partial discharge quantity: under rated voltage, partial discharge quantity≤50pC.
4, other parts are function instrument.
Advantage of the present utility model and good effect: in the utility model, regulating compensation transformer depressor is subjects, serves as again the effect of testing transformer; AC extra high voltage main-transformer and regulating compensation transformer depressor reach local discharge test voltage simultaneously, partial discharge detecting system completes the measurement of partial discharge of AC extra high voltage main transformer and regulating compensation transformer simultaneously, AC extra high voltage main transformer and modulation Partial Discharge Testing on Site once complete, test routine is greatly simplified, improves work efficiency; The required voltage that applies of testing equipment reduces greatly, obtains trial voltage and is more prone to, the testing equipment such as variable-frequency power sources, compensation reactor is greatly simplified, has saved experimentation cost; Increase the insulation examination dynamics of modulation, make the insulation of modulation examine science and comprehensively more; The electrical cable that during test, AC extra high voltage main transformer and regulating compensation become need not be removed, and reduces work on the spot amount, improves work efficiency.
The above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly belong to those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within 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 (1)
1. an AC extra high voltage main transformer modulation associating partial discharge test system, comprise variable-frequency power sources (1), testing transformer (2), compensation reactor (3), capacitive divider (4), partial discharge detecting system (5), and subjects regulating compensation transformer (6) and AC extra high voltage main body transformer (7), it is characterized in that: the output terminal of variable-frequency power sources (1) is connected with the low-pressure side of testing transformer (2), the high-pressure side of testing transformer (2) is connected with the low-pressure side of regulating compensation transformer (6), the high-pressure side of regulating compensation transformer (6) is connected with the low-pressure side of AC extra high voltage main body transformer (7), the compensation reactor (3) for compensating perceptual capacity and the capacitive divider (4) for measuring is parallel with between testing transformer (2) and regulating compensation transformer (6), AC extra high voltage main body transformer (7) and regulating compensation transformer (6) are all equipped with partial discharge detecting system (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520137852.5U CN204405793U (en) | 2015-03-11 | 2015-03-11 | AC extra high voltage main transformer modulation associating partial discharge test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520137852.5U CN204405793U (en) | 2015-03-11 | 2015-03-11 | AC extra high voltage main transformer modulation associating partial discharge test system |
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| CN204405793U true CN204405793U (en) | 2015-06-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104714158A (en) * | 2015-03-11 | 2015-06-17 | 国家电网公司 | Alternating-current ultrahigh voltage main transformer and regulation transformer combined partial discharge testing system and method |
| CN105929313A (en) * | 2016-06-01 | 2016-09-07 | 国网河北省电力公司电力科学研究院 | Hollow coil sensor for high-voltage equipment partial discharge measurement |
-
2015
- 2015-03-11 CN CN201520137852.5U patent/CN204405793U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104714158A (en) * | 2015-03-11 | 2015-06-17 | 国家电网公司 | Alternating-current ultrahigh voltage main transformer and regulation transformer combined partial discharge testing system and method |
| CN104714158B (en) * | 2015-03-11 | 2017-12-15 | 国家电网公司 | AC extra high voltage main transformer modulation combines partial discharge test system and method |
| CN105929313A (en) * | 2016-06-01 | 2016-09-07 | 国网河北省电力公司电力科学研究院 | Hollow coil sensor for high-voltage equipment partial discharge measurement |
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