CN103278790B - A kind of current transformer ratio polarity high speed tester and method of testing - Google Patents
A kind of current transformer ratio polarity high speed tester and method of testing Download PDFInfo
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- CN103278790B CN103278790B CN201310116621.1A CN201310116621A CN103278790B CN 103278790 B CN103278790 B CN 103278790B CN 201310116621 A CN201310116621 A CN 201310116621A CN 103278790 B CN103278790 B CN 103278790B
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Abstract
The present invention relates to a kind of can make current transformer ratio, the time of polarity test is shortened to about 25min by about 50min, have again that volume is little, be easy to carry, certainty of measurement is high, a kind of current transformer ratio polarity high speed tester of safe and reliable advantage and method of testing, the voltage exported by volt-ampere tester inputs the volt-ampere voltage input end of this tester, by S1、S2Output excitation voltage U2To the secondary coil of current transformer, the primary voltage U of the primary side input of current transformer to this tester1Input, volt-ampere input to excitation voltage U2Outfan concatenates a shape small size current mutual inductor, is used for monitoring voltammetric current I；U2, I and U1Sample through corresponding range switch circuit, buffer amplifier circuit and AD respectively, deliver to CPU, CPU through Phototube Coupling and measure the amplitude of 3 road signals, U2And U1Become square wave through waveform translation circuit the most respectively, after Phototube Coupling, deliver to CPU, be used for measuring U2And U1Phase contrast, thus judge the polarity of current transformer.
Description
Technical field
The present invention relates to a kind of can make current transformer ratio, the time of polarity test is shortened to about 25min by about 50min, have again that volume is little, be easy to carry, certainty of measurement is high, a kind of current transformer ratio polarity high speed tester of safe and reliable advantage and method of testing, belongs to strong voltage current tester and manufactures field.
Background technology
CN102780234A, title " generation engineering high-voltage electrical apparatus adjustment method ", this adjustment method includes that debugging prepares, high pressure equipment static test and debugging, electromotor static test and debugging, PT nuclear phase, firing test, dynamically and directionally and electricity generation grid-connecting, it is characterized in that: the wiring of voltage transformer, polarity check and no-load voltage ratio experiment with measuring do the wiring of voltage measuring transformer winding, when polarity check and no-load voltage ratio experiment with measuring, before measuring transformer one, the insurance of secondary side disconnects, the line correspondence of measuring of type full-automatic transformation ratio tester is received and measured on winding leading-out terminal in the primary side of voltage transformer and secondary side, then start to measure；When the result measured is that three-phase no-load voltage ratio is 100, the mode of connection is Y, and during y0, no-load voltage ratio, polarity and wiring are the most correct；When doing the wiring of voltage transformer protective winding, polarity check and no-load voltage ratio experiment with measuring; should be opening short circuit; form delta connection; then the line correspondence of measuring of type full-automatic transformation ratio tester is received in the primary side of voltage transformer and secondary side on three da terminals of protective winding; when the result measured is that three-phase no-load voltage ratio is 300, the mode of connection is Y; during d, no-load voltage ratio, polarity and wiring are the most correct.Its weak point: one is testing equipment heaviness, complex procedures；Two sometimes will be to upper kiloampere when being high current, if wiring is the most firm, can cause serious arcing, injure equipment and the person；Three moments adding DC voltage when being and test can produce on the wiring bus-row of rheology burns.
Summary of the invention
Purpose of design: avoid the weak point in background technology, design and a kind of can make current transformer ratio, the time of polarity test is shortened to about 25min by about 50min, has again that volume is little, is easy to carry, certainty of measurement is high, peace closes a kind of current transformer ratio polarity high speed tester and the method for testing of reliable advantage.
Design: in order to realize the above-mentioned purpose of design of the present invention.1, no-load voltage ratio is measured: when doing secondary winding in current transformer volt-ampere characteristic test, Secondary Winding has added excitation voltage U2, if now transformer winding induced voltage U1 being carried out synchro measure, so U2/U1 can calculate the no-load voltage ratio of current transformer, and voltage method surveys current transformer ratio.2. polarity measurement: while voltage method no-load voltage ratio is measured, measures the phase contrast of U2 and U1, so that it may judge the polarity of current transformer: if U1 and U2 homophase (phase contrast is close to 0 °), be then subtractive polarity；If U1 and U2 anti-phase (phase contrast is close to 180 °), then it it is additive polarity.3, the determination of voltage measurement range: U1, U2 measurement is required to be root-mean-square value, the measurement scope of U2 voltage need to determine, to measure winding according to the C-V characteristic of different current transformers; saturation voltage is relatively low; to jumbo protective winding, saturation voltage is higher, determines that first range of U2 is1000V, it is contemplated that take into account measure winding, determine that U2 the second range is 100 V, so Secondary Winding voltage voltage from 10V to 100V all can be measured；Measurement scope to U1, minimum can be measured 0.05V, determine that U1 maximum is measured as5V, determine that range is 5V and 0.5V and is automatic range.4, surveying current transformer principle analysis according to voltage method, exciting current is the least, and systematic error is the least, different for different CT saturation voltages, and exciting current is introduced tester, close to measuring no-load voltage ratio time saturated, measures U1 and U2 further to improve.
Technical scheme 1: a kind of current transformer ratio polarity high speed tester, including ratio tester for current transformer, described ratio tester for current transformer signal output part one tunnel connects excitation voltage monitor signal input, a road connects the signal input part of no-load voltage ratio display, a road connects the signal input part of primary voltage display.
Technical scheme 2: the method for testing of a kind of current transformer ratio polarity high speed tester, is characterized in that: the voltage exported by volt-ampere tester inputs the volt-ampere voltage input end of this tester, by S1、S2Output excitation voltage U2To the secondary coil of current transformer, the primary voltage U of the primary side input of current transformer to this tester1Input, volt-ampere input to excitation voltage U2Outfan concatenates a shape small size current mutual inductor, is used for monitoring voltammetric current I；U2, I and U1Sample through corresponding range switch circuit, buffer amplifier circuit and AD respectively, deliver to CPU, CPU through Phototube Coupling and measure the amplitude of 3 road signals, U2And U1Become square wave through waveform translation circuit the most respectively, after Phototube Coupling, deliver to CPU, be used for measuring U2And U1Phase contrast, thus judge the polarity of current transformer.
The present invention is compared with background technology, and one is no-load voltage ratio and the polarity using alternating voltage method to measure rheology, not only measures more accurate, it is simple to control and protect, and voltage can continuously adjust；Two be owing to have employed current transformer ratio, polarity high speed tester carries out rheological test, thus saves the time, i.e. (50-20) min/ group × 24(group)=720min, work efficiency improves 60%；Three is owing to have employed voltage method, and ratio current method safety and reliability eliminates safety risks, it is ensured that the personal safety of operative employee.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of current transformer ratio polarity high speed tester.
Fig. 2 is Fig. 1 circuit theory schematic diagram.
Fig. 3 is the connection diagram of tested current transformer.
Fig. 4 is the partial enlargement structural representation of Fig. 1.
Detailed description of the invention
Embodiment 1: 1-4 referring to the drawings.A kind of current transformer ratio polarity high speed tester, including ratio tester for current transformer, this ratio tester for current transformer is prior art, is not described herein at this.Described ratio tester for current transformer signal output part one tunnel connects excitation voltage monitor signal input, a road connects the signal input part of no-load voltage ratio display, a road connects the signal input part of primary voltage display.
In Fig. 1: 1. excitation voltage U2Display window；2. volt-ampere voltage input-terminal；3. no-load voltage ratio display window；4. excitation voltage U2Lead-out terminal；5. two rated current select current transformer；6. primary voltage U1Input terminal；7. primary voltage U1Display window；8. ground terminal；9. power input socket；10. power supply is opened；11. polarity display lamps；12. continuous/singles select current transformer；13. SRs.
Using digital-scroll technique no-load voltage ratio, owing to Current Transformer Secondary rated current has 1A and 5A, no-load voltage ratio value shown according to actual current mutual inductor ratio, secondary current also with numeral method, need to increase a secondary rated current and select switch.Polarity diode displaying, is shown in Fig. 4.
Embodiment 2: on the basis of embodiment 1, the method for testing of a kind of current transformer ratio polarity high speed tester, volt-ampere tester the voltage exported inputs the volt-ampere voltage input end of this tester, by S1、S2Output excitation voltage U2To the secondary coil of current transformer, the primary voltage U of the primary side input of current transformer to this tester1Input, volt-ampere input to excitation voltage U2Outfan concatenates a shape small size current mutual inductor, is used for monitoring voltammetric current I；U2, I and U1Sample through corresponding range switch circuit, buffer amplifier circuit and AD respectively, deliver to CPU, CPU through Phototube Coupling and measure the amplitude of 3 road signals, U2And U1Become square wave through waveform translation circuit the most respectively, after Phototube Coupling, deliver to CPU, be used for measuring U2And U1Phase contrast, thus judge the polarity of current transformer.U1, U2 measurement is required to be root-mean-square value, and the measurement scope of U2 voltage need to determine according to the C-V characteristic of different current transformers, and to measure winding, saturation voltage is relatively low, and to jumbo protective winding, saturation voltage is higher, and first range of U2 is1000V, U2 the second range is 100 V；U1 range is 5V and 0.5V and is automatic range.The raising of the certainty of measurement of U1 and U2, then for the saturation voltage of different CT, utilize exciting current to introduce tester close to measuring no-load voltage ratio time saturated.If U1 and U2 homophase, phase contrast close to 0 °, is then subtractive polarity；If U1 and U2 is anti-phase, phase contrast close to 180 °, is then additive polarity.
It is to be understood that: although the word that the mentality of designing of the present invention is contrasted detailed by above-described embodiment describes; but these words describe; simply the simple text of mentality of designing of the present invention is described; rather than the restriction to mentality of designing of the present invention; any combination without departing from mentality of designing of the present invention, increase or revise, each falling within protection scope of the present invention.
Claims (1)
1. a current transformer ratio polarity high speed tester, including ratio tester for current transformer, it is characterized in that: described ratio tester for current transformer signal output part one tunnel connects excitation voltage monitor signal input, a road connects the signal input part of no-load voltage ratio display, a road connects the signal input part of primary voltage display；Its method of testing: the voltage exported by volt-ampere tester inputs the volt-ampere voltage input end of this tester, by excitation voltage U2Lead-out terminal S1、S2Output excitation voltage U2To the secondary coil of tested current transformer, the primary voltage U of the primary side input of tested current transformer to this tester1Input, volt-ampere tester input to excitation voltage U2Outfan concatenates a shape small size current mutual inductor, is used for monitoring voltammetric current I；U2, I and U1Sample through corresponding range switch circuit, buffer amplifier circuit and AD respectively, deliver to CPU, CPU through Phototube Coupling and measure the amplitude of 3 road signals, U2And U1Become square wave through waveform translation circuit the most respectively, after Phototube Coupling, deliver to CPU, be used for measuring U2And U1Phase contrast, thus judge the polarity of current transformer；While voltage method no-load voltage ratio is measured, measure the phase contrast of U2 and U1, so that it may judge the polarity of current transformer: if U1 and U2 homophase, i.e. phase contrast are close to 0 °, be then subtractive polarity；If U1 and U2 is reverse, i.e. phase contrast is close to 180 °, then be additive polarity；U1, U2 measurement is required to be root-mean-square value, and the measurement scope of U2 voltage need to determine according to the C-V characteristic of different current transformers, and to measure winding, saturation voltage is relatively low, and to jumbo protective winding, saturation voltage is higher, determines that first range of U2 is1000V, it is contemplated that take into account measure winding, determine that U2 the second range is 100 V, so Secondary Winding voltage voltage from 10V to 100V all can be measured；Measurement scope to U1, minimum can be measured 0.05V, determine that U1 maximum is measured as5V, determine that range is 5V and 0.5V and is automatic range.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310116621.1A CN103278790B (en) | 2012-11-29 | 2013-04-03 | A kind of current transformer ratio polarity high speed tester and method of testing |
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| CN2012206435395 | 2012-11-29 | ||
| CN201220643539 | 2012-11-29 | ||
| CN201220643539.5 | 2012-11-29 | ||
| CN201310116621.1A CN103278790B (en) | 2012-11-29 | 2013-04-03 | A kind of current transformer ratio polarity high speed tester and method of testing |
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| CN103278790B true CN103278790B (en) | 2016-12-28 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646133B (en) * | 2016-01-18 | 2020-05-12 | 刘晓冰 | Manufacturing method of wiring device for detecting polarity of current transformer |
| US10109994B2 (en) * | 2016-03-24 | 2018-10-23 | Littelfuse, Inc. | Multiple current sensor system |
| CN106940391B (en) * | 2017-04-06 | 2019-04-12 | 国网山西省电力公司太原供电公司 | Threephase current transformer no-load voltage ratio on-line conversion intelligent controller |
| CN107271830B (en) * | 2017-05-25 | 2019-12-20 | 保定丰源电子科技有限公司 | Method for rapidly calculating transformation ratio of special transformer in unbalanced state |
| CN107167758B (en) * | 2017-07-11 | 2020-11-10 | 国网辽宁省电力有限公司沈阳供电公司 | Transformer transformation ratio and polarity tester with waveform display function |
| CN107728092A (en) * | 2017-10-02 | 2018-02-23 | 国网山西省电力公司电力科学研究院 | The automatic precision pre-check device and method of calibration of Transformer Winding no-load voltage ratio tester |
| CN108732459A (en) * | 2018-03-23 | 2018-11-02 | 国网上海市电力公司 | A kind of current transformer polarity testing method |
| CN111077477A (en) * | 2019-10-27 | 2020-04-28 | 徐州和纬信电科技有限公司 | Line selection device and zero sequence current polarity detection and automatic correction method thereof |
| CN111257798B (en) * | 2020-01-16 | 2022-05-10 | 江苏广识电气有限公司 | Method for detecting polarity of zero sequence current of line selection and automatically correcting |
| CN111398644B (en) * | 2020-03-31 | 2022-07-01 | 贵州电网有限责任公司 | Mutual inductor handover test switching device and switching method thereof |
| CN112327016A (en) * | 2020-11-05 | 2021-02-05 | 国网湖北省电力有限公司宜昌供电公司 | Current transformer test wire box |
| CN113138336B (en) * | 2021-04-16 | 2022-11-01 | 西安热工研究院有限公司 | Test method for measuring voltage and power direction of generator by short route test in high plant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201514455U (en) * | 2009-09-04 | 2010-06-23 | 武汉市豪迈电力自动化技术有限责任公司 | CT/PT comprehensive test instrument for electric power |
| CN102621407A (en) * | 2012-04-27 | 2012-08-01 | 江苏省电力公司宿迁供电公司 | Method for measuring transformation ratio of transformer in power failure state |
| CN102780234A (en) * | 2012-08-08 | 2012-11-14 | 中国二十二冶集团有限公司 | High-voltage electric debugging method for power generation project |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7030602B2 (en) * | 2004-02-04 | 2006-04-18 | Kuhlman Electric Corporation | Testing of current transformers |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201514455U (en) * | 2009-09-04 | 2010-06-23 | 武汉市豪迈电力自动化技术有限责任公司 | CT/PT comprehensive test instrument for electric power |
| CN102621407A (en) * | 2012-04-27 | 2012-08-01 | 江苏省电力公司宿迁供电公司 | Method for measuring transformation ratio of transformer in power failure state |
| CN102780234A (en) * | 2012-08-08 | 2012-11-14 | 中国二十二冶集团有限公司 | High-voltage electric debugging method for power generation project |
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