CN102721911A - Method and system for impulse withstand voltage test of transformer - Google Patents
Method and system for impulse withstand voltage test of transformer Download PDFInfo
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- CN102721911A CN102721911A CN201210245143XA CN201210245143A CN102721911A CN 102721911 A CN102721911 A CN 102721911A CN 201210245143X A CN201210245143X A CN 201210245143XA CN 201210245143 A CN201210245143 A CN 201210245143A CN 102721911 A CN102721911 A CN 102721911A
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Abstract
The invention relates to a method and a system for an impulse withstand voltage test of a transformer. The method is characterized by comprising the following steps of: (1) applying a low-amplitude impulse voltage to a low-voltage winding of the transformer, wherein the maximum value of the amplitude is not more than 50 percent of a test voltage, and the low-amplitude impulse voltage ensures that a high-amplitude impulse voltage is induced on a high-voltage winding of the transformer; and (2) adjusting the low-amplitude impulse voltage to ensure that the waveform of the low-amplitude impulse voltage meets the requirement on an oscillation type operation impulse voltage in the impulse withstand voltage test. Because a voltage transformation principle of the transformer is used and the impulse withstand voltage test is performed step by step, the impulse withstand voltage test in the prior art can be simplified on the premise of safety, low cost and convenience as much as possible, and the function of the impulse withstand voltage test is given into full play.
Description
Technical field
The present invention relates to the high voltage and insulation technology field, relate in particular to a kind of impulse voltage endurance test method and system thereof that is used for transformer.
Background technology
The effect of power transformer in electrical network is very important, and withstand voltage test then is the important tests project that guarantees the power transformer safe operation.Development along with China's extra-high voltage grid; The transformer application of high capacity, voltage levels more and more widely, yet, for the transformer of high capacity, voltage levels; Except AC voltage withstand test, lightning impulse and switching impulse withstand voltage test also are very important routine tests.
At present, even if implement the impulse voltage withstand test of transformer, its test method is also mostly to be when delivery test, carries out through adding the required surge voltage of trial voltage grade.Yet the impulse voltage generator that this test method needs exists that equipment is huge, of a high price, complex structure, be difficult to problem such as operation, thereby causes this test method to be difficult to by widespread usage.This shows, press for a kind of convenience, reliable in the reality, cheap impulse withstand voltage method and system thereof to transformer.
Summary of the invention
The present invention is intended to solve the problems of the technologies described above and has proposed a kind of impulse voltage endurance test method that is used for transformer, it is characterized in that:
Step (1): on the low pressure winding of said transformer, apply the low amplitude value surge voltage, its amplitude maximal value is no more than 50% of trial voltage, and said low amplitude value surge voltage makes and induces the amplitude surge voltage on the high pressure winding of said transformer;
Step (2): adjust said low amplitude value surge voltage, make the requirement that the desired oscillation mode operating impulse voltage of withstand voltage test is hit in its tilde syzygies.
In addition; The invention also discloses a kind of system for carrying out said process that is used to implement, said system comprises low amplitude value impulse voltage generator, transformer; And oscillograph; It is characterized in that: said low amplitude value impulse voltage generator is connected on the low pressure winding of said transformer, connects a voltage divider on the high pressure winding of said transformer, and said voltage divider also is connected with said oscillograph.
Embodiment
For ease of it will be apparent to those skilled in the art that the present invention, the spy is described further the present invention.
To disclosed a kind of this technical scheme of impulse voltage endurance test method that is used for transformer of the present invention, it is characterized in that:
Step (1): on the low pressure winding of said transformer, apply the low amplitude value surge voltage, its amplitude maximal value is no more than 50% of trial voltage, and said low amplitude value surge voltage makes and induces the amplitude surge voltage on the high pressure winding of said transformer;
Step (2): adjust said low amplitude value surge voltage, make the requirement that the desired oscillation mode operating impulse voltage of withstand voltage test is hit in its tilde syzygies.
For the foregoing description; Present embodiment has demonstrated fully core thinking of the present invention: i.e. how the impulse withstand voltage performance that induction through transformer self comes testing transformer and does not rely on other complicated, specialized equipments expensive, that be not easy to move.With regard to step (1), it makes present embodiment under initial, low amplitude value surge voltage, to carry out preliminary impulse voltage withstand test to transformer, and present embodiment is no more than 50% of trial voltage with the amplitude maximal value of low amplitude value surge voltage to carry out; Such as 20%, 30%, or 50%; Why like this; Mainly be from the cause that adopts a lower voltage at the impulse voltage withstand test initial period, so that under the situation of low amplitude value, adjust voltage, the viewing test situation; Being convenient to the later stage progressively improves voltage magnitude and makes the impulse voltage withstand test under the high voltage more; Thereby the raising test efficiency reduces the adjustment number of times of said low amplitude value surge voltage, also can avoid the too high accidental damage that brings of voltage magnitude simultaneously; And then; Step (2) is in order to make the waveform in the test meet the relevant requirement of testing; The testing requirements here can be the relevant GB standard-required of country, also can be international relevant IEC standard-required, can also be other non-standard requirements of adopting from exploring the new standard purpose.
Preferably, in another embodiment: the low amplitude value surge voltage in the said step (1) obtains through the low amplitude value impulse voltage generator, and said low amplitude value impulse voltage generator is connected on the low pressure winding of said transformer through the high-tension shielding line.This embodiment define the low amplitude value surge voltage the source and with the concrete connected mode of low pressure winding.
Preferably, in another embodiment: step (2) also comprises the steps: afterwards
Step (3): gradually the amplitude maximal value of said low amplitude value surge voltage is adjusted to 100% of trial voltage.This embodiment is clearly then after waveform adjusts, to the needs of concrete test, and the electric pressure that the low pressure winding is applied.
Be not limited to above-mentioned test method, the present invention also provides the system that is used to implement above-mentioned arbitrary method, and said system comprises the low amplitude value impulse voltage generator, and transformer, and oscillograph is characterized in that:
Said low amplitude value impulse voltage generator is connected on the low pressure winding of said transformer, connects voltage divider on the high pressure winding of said transformer, and said voltage divider also is connected with said oscillograph.
With regard to the disclosed technical scheme of the embodiment of said system; The low pressure winding of above-mentioned low amplitude value impulse voltage generator and transformer, high pressure winding, voltage divider and oscillograph are according to after connected mode connects as stated, and we just can implement the described test method of preamble easily.The low amplitude value surge voltage that the low amplitude value impulse voltage generator is produced puts on the low pressure winding and understands easily naturally; As for voltage divider and oscillograph then is to be used to observe surge voltage waveform and amplitude; Oscillograph be will be convenient to after the voltage divider dividing potential drop and the voltage waveform and/or the amplitude of this side of high pressure winding in its range ability, observed; Thereby be convenient to waveform and/or amplitude, make whole impulse voltage withstand test Pass Test requirement through the low amplitude value surge voltage of this side of adjustment low pressure winding.Through adjusting the component parameters of said low amplitude value impulse voltage generator,, be easy to adjust the waveform and/or the amplitude of voltage such as resistance, inductance etc.In a single day waveform is adjusted, and iff is that the amplitude maximal value that needs to improve the low amplitude value surge voltage arrives more than 50% of trial voltage, and even 100%, all be easy to realize through the component parameters of adjustment impulse voltage generator.
Preferably, in another embodiment: said low amplitude value impulse voltage generator is connected on the low pressure winding of said transformer through the high-tension shielding line.This embodiment is in order to reduce the disturbing factor of test, to guarantee that as far as possible test accurately.
To sum up, the invention solves that transformer is difficult to carry out easily the problem of impulse voltage withstand test in the prior art, and corresponding method and system is provided, not only convenient, reliable, and also cheap.Pass through the transformation principle of transformer self and enforcement impulse voltage withstand test in steps just because of the present invention; Just be able to reducing cost as far as possible safely, as far as possible, enough simplifying impulse voltage withstand test of the prior art under the prerequisite easily, thereby give full play to the effect of impulse voltage withstand test.
Above embodiment specifies the present invention; Those skilled in the art can make the different embodiments that change to the present invention according to above-mentioned explanation; For example high pressure winding is wherein replaced with the middle pressure winding of some transformer; Perhaps other change, because some details among the embodiment only is more excellent mode, are not construed as limiting the invention.
Claims (5)
1. impulse voltage endurance test method that is used for transformer is characterized in that:
Step (1): on the low pressure winding of said transformer, apply the low amplitude value surge voltage, its amplitude maximal value is no more than 50% of trial voltage, and said low amplitude value surge voltage makes and induces the amplitude surge voltage on the high pressure winding of said transformer;
Step (2): adjust said low amplitude value surge voltage, make the requirement that the desired oscillation mode operating impulse voltage of withstand voltage test is hit in its tilde syzygies.
2. method according to claim 1; It is characterized in that: the low amplitude value surge voltage in the said step (1) obtains through the low amplitude value impulse voltage generator, and said low amplitude value impulse voltage generator is connected on the low pressure winding of said transformer through the high-tension shielding line.
3. method according to claim 1 is characterized in that: step (2) also comprises the steps: afterwards
Step (3): gradually the amplitude maximal value of said low amplitude value surge voltage is adjusted to 100% of trial voltage.
4. system that is used to implement aforesaid right requirement 1 to 3 arbitrary method; Said system comprises the low amplitude value impulse voltage generator; Transformer, and oscillograph is characterized in that: said low amplitude value impulse voltage generator is connected on the low pressure winding of said transformer; Connect voltage divider on the high pressure winding of said transformer, said voltage divider also is connected with said oscillograph.
5. system according to claim 4 is characterized in that: said low amplitude value impulse voltage generator is connected on the low pressure winding of said transformer through the high-tension shielding line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210245143.XA CN102721911B (en) | 2012-07-16 | 2012-07-16 | Method and system for impulse withstand voltage test of transformer |
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| CN201210245143.XA CN102721911B (en) | 2012-07-16 | 2012-07-16 | Method and system for impulse withstand voltage test of transformer |
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| CN102721911A true CN102721911A (en) | 2012-10-10 |
| CN102721911B CN102721911B (en) | 2014-11-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954654A (en) * | 2016-04-26 | 2016-09-21 | 西安交通大学 | Fault diagnosis method and system for transformer induction type impulse voltage withstanding test |
| CN108490321A (en) * | 2018-03-21 | 2018-09-04 | 广东电网有限责任公司电力科学研究院 | A kind of induction type switching impulse Withstand test device |
| CN108872775A (en) * | 2018-04-13 | 2018-11-23 | 山东电力设备有限公司 | AC and DC transformer coil surge voltage measuring and analysis system and method |
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| JPS6056269A (en) * | 1983-09-08 | 1985-04-01 | Fuji Electric Co Ltd | Ac withstand voltage testing method of transformer |
| JPS61176869A (en) * | 1985-02-01 | 1986-08-08 | Hitachi Ltd | Method for testing lightning impulse voltage or transformer |
| CN101452059A (en) * | 2007-11-30 | 2009-06-10 | 上海市电力公司 | Impulse voltage endurance test method |
| CN101526580A (en) * | 2009-01-16 | 2009-09-09 | 国网电力科学研究院 | Method for testing on-site impact of gas insulated switchgear |
| CN201540348U (en) * | 2009-12-07 | 2010-08-04 | 苏州市华电电气技术有限公司 | Portable alternating-current withstand voltage testing device of high-voltage electric device |
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2012
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6056269A (en) * | 1983-09-08 | 1985-04-01 | Fuji Electric Co Ltd | Ac withstand voltage testing method of transformer |
| JPS61176869A (en) * | 1985-02-01 | 1986-08-08 | Hitachi Ltd | Method for testing lightning impulse voltage or transformer |
| CN101452059A (en) * | 2007-11-30 | 2009-06-10 | 上海市电力公司 | Impulse voltage endurance test method |
| CN101526580A (en) * | 2009-01-16 | 2009-09-09 | 国网电力科学研究院 | Method for testing on-site impact of gas insulated switchgear |
| CN201540348U (en) * | 2009-12-07 | 2010-08-04 | 苏州市华电电气技术有限公司 | Portable alternating-current withstand voltage testing device of high-voltage electric device |
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| 刘友翔等: "变压器的现场操作波感应耐压试验", 《华东电力》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954654A (en) * | 2016-04-26 | 2016-09-21 | 西安交通大学 | Fault diagnosis method and system for transformer induction type impulse voltage withstanding test |
| CN105954654B (en) * | 2016-04-26 | 2018-10-16 | 西安交通大学 | A kind of transformer induction formula impulse withstand voltage testing failure diagnostic method and system |
| CN108490321A (en) * | 2018-03-21 | 2018-09-04 | 广东电网有限责任公司电力科学研究院 | A kind of induction type switching impulse Withstand test device |
| CN108872775A (en) * | 2018-04-13 | 2018-11-23 | 山东电力设备有限公司 | AC and DC transformer coil surge voltage measuring and analysis system and method |
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| Publication number | Publication date |
|---|---|
| CN102721911B (en) | 2014-11-26 |
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