CN110133565A - A kind of voltage transformer method of calibration - Google Patents
A kind of voltage transformer method of calibration Download PDFInfo
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- CN110133565A CN110133565A CN201910546231.5A CN201910546231A CN110133565A CN 110133565 A CN110133565 A CN 110133565A CN 201910546231 A CN201910546231 A CN 201910546231A CN 110133565 A CN110133565 A CN 110133565A
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- voltmeter
- fuse
- voltage transformer
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- voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of voltage transformer methods of calibration, the primary terminals of three-phase regulator are respectively connected to fuse I, fuse II, fuse III by this method, fuse I, fuse II, fuse III the other end be respectively connected to three-phase ac contactor, the other end of the three-phase ac contactor accesses 380V AC power source；The secondary terminals of three-phase regulator are respectively connected to A, B, C terminals of voltage transformer primary, and voltmeter I is accessed between A terminals and B terminals, and voltmeter II is accessed between B terminals and C terminals；A, b, c terminals of voltage transformer the first winding of secondary access voltmeter III, voltmeter IV, voltmeter V between zero potential respectively；Voltmeter VI is accessed between the da terminals and zero potential of voltage transformer the second winding of secondary, is then verified.Its step of the invention simplifies, and it is convenient to test, and improves work efficiency, ensures safety production.
Description
Technical field
The invention belongs to technical field of electric power transmission more particularly to a kind of voltage transformer methods of calibration.
Background technique
In high voltage power transmission technical field, voltage transformer is widely used, before the use, it usually needs mutual to voltage
Sensor carries out no-load voltage ratio test, and to verify the requirement whether applied voltage mutual inductor meets engineering, original no-load voltage ratio test method is
No-load voltage ratio test is grouped to voltage transformer, it may be assumed that voltage is individually entered per between terminals two-by-two in voltage transformer primary,
Then recording voltage transformer secondary voltage corresponding with primary calculates the no-load voltage ratio of voltage transformer, this method step again
It is rapid it is cumbersome, secondary connection is more, working efficiency is low.
Summary of the invention
To solve the above problems, the present invention proposes a kind of voltage transformer method of calibration, this method step letter
Change, it is convenient to test, and improves work efficiency, ensures safety production.
To achieve the goals above, whether qualified, wiring is correct disposable by the no-load voltage ratio of voltage transformer by the present invention
It verifies successfully, specifically includes the following steps:
1) the primary terminals of three-phase regulator are respectively connected to fuse I, fuse II, fuse III by, fuse I,
Fuse II, fuse III the other end be respectively connected to three-phase ac contactor, the access of the other end of the three-phase ac contactor
380V AC power source；
The secondary terminals of three-phase regulator are respectively connected to A, B, C terminals of voltage transformer primary, and in A terminals
Voltmeter I is accessed between B terminals, and voltmeter II is accessed between B terminals and C terminals；
A, b, c terminals of voltage transformer the first winding of secondary access voltmeter III, voltage between zero potential respectively
Table IV, voltmeter V；Voltmeter VI is accessed between the da terminals and zero potential of voltage transformer the second winding of secondary；
2) adjusts three-phase regulator, increase the output voltage stepping of three-phase regulator, and just every grade of output voltage difference
Recording voltmeter I, voltmeter II, voltmeter III, voltmeter IV, voltmeter V numerical value, at the beginning of calculating voltage transformer with this
The no-load voltage ratio of grade and secondary first winding；
3) calculated voltage transformer primary is compareed the product of the voltage transformer by with the no-load voltage ratio of secondary first winding
Parameter, it is determined whether meet, under the premise of meeting；
4) fuse I disconnects, and fuse II is closed, and fuse III is closed, recording voltmeter I, the numerical value of voltmeter II with
And the numerical value of voltmeter VI；
5) fuse I is closed, and fuse II disconnects, and fuse III is closed, recording voltmeter I, the numerical value of voltmeter II with
And the numerical value of voltmeter VI,；
6) fuse I is closed, and fuse II is closed, and fuse III disconnects, recording voltmeter I, the numerical value of voltmeter II with
And the numerical value of voltmeter VI；
7) according to step 4), 5), 6) numerical value that is recorded calculates the change of voltage transformer primary and secondary second winding
Than；
8) is by the no-load voltage ratio and the voltage transformer of the calculated voltage transformer primary of step 7) and secondary second winding
Product parameters control, it is determined whether meet, can be determined that voltage transformer no-load voltage ratio is correct and outside line connects just if met
Really, Voltage Transformer Damages or outside line connection error be can be determined that if do not met.
A kind of its step of voltage transformer method of calibration of the present invention simplifies, and it is convenient to test, and improves work efficiency, and ensures
Safety in production.
Detailed description of the invention
Fig. 1 is voltage transformer electrical schematic diagram.
Circuit connection diagram when Fig. 2 is voltage transformer of the present invention verification.
Specific embodiment
In order to which those skilled in the art are more clearly understood to the present invention, one is made briefly to former method of calibration first
Explanation.
As shown in Figure 1, the step of former method of calibration, is: the input voltage between voltage transformer primary terminals A, B, point
The voltage between voltage transformer secondary first winding a, b, c and zero potential is not measured, is measured the second winding of voltage transformer and is connect
Voltage between line end da and zero potential calculates separately out voltage transformer primary and secondary first winding, is primary with secondary the
Two winding no-load voltage ratios；The input voltage between voltage transformer primary terminals B, C, measure respectively voltage transformer secondary first around
Voltage between group a, b, c and zero potential, measures the voltage between the second winding connection of voltage transformer end da and zero potential, point
Voltage transformer primary and secondary first winding, the primary no-load voltage ratio with secondary second winding are not calculated；At the beginning of voltage transformer
Input voltage between grade terminals A, C, measures the electricity between voltage transformer secondary first winding a, b, c and zero potential respectively
Pressure, measures the voltage between the second winding connection of voltage transformer end da and zero potential, calculates separately out voltage transformer primary
With secondary first winding, the primary no-load voltage ratio with secondary second winding, it is seen that above-mentioned method of calibration is very cumbersome.
The present invention is described in further detail with reference to the accompanying drawing, and whether the present invention closes the no-load voltage ratio of voltage transformer
Whether lattice, wiring correctly disposably verify successfully, as shown in Fig. 2, specifically includes the following steps:
1) the primary terminals of three-phase regulator TYB are respectively connected to I FU1 of fuse, II FU2 of fuse, fuse III by
FU3, fuse I, fuse II, fuse III the other end be respectively connected to three-phase ac contactor ZK, the three-phase alternating current contact
The other end of device accesses 380V AC power source；
The secondary terminals of three-phase regulator are respectively connected to A, B, C terminals of voltage transformer primary, and in A terminals
I V1 of voltmeter is accessed between B terminals, and II V2 of voltmeter is accessed between B terminals and C terminals；
A, b, c terminals of voltage transformer the first winding of secondary access III V3 of voltmeter, electricity between zero potential respectively
Press IV V4 of table, V V5 of voltmeter；Voltmeter VI is accessed between the da terminals and zero potential of voltage transformer the second winding of secondary
V6；
2) adjusts three-phase regulator, increase the output voltage stepping of three-phase regulator, and just every grade of output voltage difference
Recording voltmeter I, voltmeter II, voltmeter III, voltmeter IV, voltmeter V numerical value, at the beginning of calculating voltage transformer with this
The no-load voltage ratio of grade and secondary first winding；
3) calculated voltage transformer primary is compareed the product of the voltage transformer by with the no-load voltage ratio of secondary first winding
Parameter, it is determined whether meet, under the premise of meeting；
4) fuse I disconnects, and fuse II is closed, and fuse III is closed, recording voltmeter I, the numerical value of voltmeter II with
And the numerical value of voltmeter VI；
5) fuse I is closed, and fuse II disconnects, and fuse III is closed, recording voltmeter I, the numerical value of voltmeter II with
And the numerical value of voltmeter VI,；
6) fuse I is closed, and fuse II is closed, and fuse III disconnects, recording voltmeter I, the numerical value of voltmeter II with
And the numerical value of voltmeter VI；
7) according to step 4), 5), 6) numerical value that is recorded calculates the change of voltage transformer primary and secondary second winding
Than；
8) is by the no-load voltage ratio and the voltage transformer of the calculated voltage transformer primary of step 7) and secondary second winding
Product parameters control, it is determined whether meet, can be determined that voltage transformer no-load voltage ratio is correct and outside line connects just if met
Really, Voltage Transformer Damages or outside line connection error be can be determined that if do not met.
It is further illustrated below by embodiment:
Embodiment
1) the primary terminals of three-phase regulator TYB are respectively connected to I FU1 of fuse, II FU2 of fuse, fuse III by
FU3, fuse I, fuse II, fuse III the other end be respectively connected to three-phase ac contactor ZK, the three-phase alternating current contact
The other end of device accesses 380V AC power source；
The secondary terminals of three-phase regulator are respectively connected to A, B, C terminals of voltage transformer primary, and in A terminals
I V1 of voltmeter is accessed between B terminals, and II V2 of voltmeter is accessed between B terminals and C terminals；
A, b, c terminals of voltage transformer the first winding of secondary access III V3 of voltmeter, electricity between zero potential respectively
Press IV V4 of table, V V5 of voltmeter；Voltmeter VI is accessed between the da terminals and zero potential of voltage transformer the second winding of secondary
V6；
2) adjusts three-phase regulator, when voltmeter I, voltmeter II are 100V, voltmeter III, voltmeter IV, voltage
Table V is respectively 0.57V, since voltmeter I, the reading of voltmeter II are line voltages, voltmeter III, voltmeter IV, voltmeter V
Reading is phase voltage, therefore, the no-load voltage ratio of voltage transformer primary and secondary first windingAbout
100；When voltmeter I, voltmeter II are 200V, voltmeter III, voltmeter IV, voltmeter V are respectively 1.14V, due to electricity
Pressure table I, voltmeter II reading be line voltage, voltmeter III, voltmeter IV, voltmeter V reading be phase voltage, therefore, electricity
Press the no-load voltage ratio of transformer primary and secondary first windingAbout 100；
3) calculated voltage transformer primary is compareed the product of the voltage transformer by with the no-load voltage ratio of secondary first winding
Parameter, it is determined whether meet, under the premise of meeting；
4) fuse I disconnects, and fuse II is closed, and fuse III is closed, and when voltmeter I is 57.7V, voltmeter II is
When 100V, voltmeter VI is 0.33V, the no-load voltage ratio of voltage transformer primary and secondary second winding
Or K2=57.7V/0.33V, it is each about 173；When voltmeter I is 115V, and II V2 of voltmeter is 200V, voltmeter VI is
0.66V, the no-load voltage ratio of voltage transformer primary and secondary second windingOr K2=115V/0.66V,
It is each about 173；
5) fuse I is closed, and fuse II disconnects, and fuse III is closed, when voltmeter I, voltmeter II are 57.7V
When, voltmeter VI is 0.33V, the no-load voltage ratio K2=57.7V/0.33V of voltage transformer primary and secondary second winding, about 173；
When voltmeter I, voltmeter II are 115V, voltmeter VI is 0.66V, the change of voltage transformer primary and secondary second winding
Than K2=115V/0.66V, about 173；
6) fuse I is closed, and fuse II is closed, and fuse III disconnects, when voltmeter I is 100V, voltmeter II is
When 57.7V, voltmeter VI is 0.33V, the no-load voltage ratio of voltage transformer primary and secondary second windingOr K2=57.7V/0.33V, it is each about 173；When voltmeter I is 200V, voltmeter II is
When 115V, voltmeter VI is 0.66V, the no-load voltage ratio of voltage transformer primary and secondary second winding
Or K2=115V/0.66V, it is each about 173；
7) is by step 4), 5), 6) calculated numerical value is compareed with the product parameters of the voltage transformer, it is determined whether symbol
It closes, can be determined that voltage transformer no-load voltage ratio is correct and outside line connection is correct if met, can be determined that electricity if do not met
Press mutual inductor damage or outside line connection error.
A kind of its step of voltage transformer method of calibration of the present invention simplifies, and it is convenient to test, and improves work efficiency, and ensures
Safety in production.
Claims (1)
1. a kind of voltage transformer method of calibration, which is characterized in that the no-load voltage ratio of voltage transformer (TV) is by the method for calibration
Whether no qualified, wiring correctly disposably verifies successfully, specifically includes the following steps:
1) the primary terminals of three-phase regulator (TYB) are respectively connected to fuse I (FU1), fuse II (FU2), fuse by
III (FU3), fuse I, fuse II, fuse III the other end be respectively connected to three-phase ac contactor (ZK), this three intersection
The other end for flowing contactor accesses 380V AC power source；
The secondary terminals of three-phase regulator are respectively connected to A, B, C terminals of voltage transformer primary, and in A terminals and B
Voltmeter I (V1) is accessed between terminals, accesses voltmeter II (V2) between B terminals and C terminals；
A, b, c terminals of voltage transformer the first winding of secondary access voltmeter III (V3), voltage between zero potential respectively
Table IV (V4), voltmeter V (V5)；Voltmeter is accessed between the da terminals and zero potential of voltage transformer the second winding of secondary
Ⅵ(V6)；
2) adjusts three-phase regulator, increase the output voltage stepping of three-phase regulator, and just every grade of output voltage records respectively
Voltmeter I, voltmeter II, voltmeter III, voltmeter IV, voltmeter V numerical value, with this calculate voltage transformer primary with
The no-load voltage ratio of secondary first winding；
3) joins calculated voltage transformer primary with the product that the no-load voltage ratio of secondary first winding compares the voltage transformer
Number, it is determined whether meet, under the premise of meeting；
4) fuse I disconnects, and fuse II is closed, and fuse III is closed, recording voltmeter I, the numerical value and electricity of voltmeter II
Press the numerical value of table VI；
5) fuse I is closed, and fuse II disconnects, and fuse III is closed, recording voltmeter I, the numerical value and electricity of voltmeter II
The numerical value of table VI is pressed,；
6) fuse I is closed, and fuse II is closed, and fuse III disconnects, recording voltmeter I, the numerical value and electricity of voltmeter II
Press the numerical value of table VI；
7) according to step 4), 5), 6) numerical value that is recorded calculates the no-load voltage ratio of voltage transformer primary and secondary second winding；
8) is by the product of the no-load voltage ratio and the voltage transformer of the calculated voltage transformer primary of step 7) and secondary second winding
Parameter control, it is determined whether meet, can be determined that voltage transformer no-load voltage ratio is correct and outside line connection is correct if met, such as
Fruit, which does not meet, can be determined that Voltage Transformer Damages or outside line connection error.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910546231.5A CN110133565A (en) | 2019-06-20 | 2019-06-20 | A kind of voltage transformer method of calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910546231.5A CN110133565A (en) | 2019-06-20 | 2019-06-20 | A kind of voltage transformer method of calibration |
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| Publication Number | Publication Date |
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| CN110133565A true CN110133565A (en) | 2019-08-16 |
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ID=67579160
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910546231.5A Pending CN110133565A (en) | 2019-06-20 | 2019-06-20 | A kind of voltage transformer method of calibration |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991606A (en) * | 2017-12-29 | 2018-05-04 | 北京合锐清合电气有限公司 | Medium voltage switchgear equipment energizing test equipment |
| EP4206703A1 (en) | 2021-12-17 | 2023-07-05 | Skarb Panstwa - Glowny Urzad Miar | System and method for simulating transformer errors in calibrating bridges for measuring transformer errors |
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| GB309128A (en) * | 1928-04-05 | 1930-03-06 | Josef Slavik | Measuring arrangements for measurement of ratio of transformation and phase angles of voltage and current transformers |
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| CN203324465U (en) * | 2013-07-08 | 2013-12-04 | 重庆大唐国际彭水水电开发有限公司 | Device using voltage method to measure ratio of transformation of current transformer |
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| GB309128A (en) * | 1928-04-05 | 1930-03-06 | Josef Slavik | Measuring arrangements for measurement of ratio of transformation and phase angles of voltage and current transformers |
| CN101806848A (en) * | 2010-04-19 | 2010-08-18 | 河南省电力公司南阳供电公司 | Detection device for preventing mis-wiring of voltage transformer and detection method thereof |
| CN102565618A (en) * | 2012-01-31 | 2012-07-11 | 云南电网公司 | Method for detecting zero-sequence voltage circuit of transformer substation |
| CN203324465U (en) * | 2013-07-08 | 2013-12-04 | 重庆大唐国际彭水水电开发有限公司 | Device using voltage method to measure ratio of transformation of current transformer |
| CN103779836A (en) * | 2014-02-18 | 2014-05-07 | 国家电网公司 | Transformer winding fault relay protection method based on ring current mutation feature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991606A (en) * | 2017-12-29 | 2018-05-04 | 北京合锐清合电气有限公司 | Medium voltage switchgear equipment energizing test equipment |
| EP4206703A1 (en) | 2021-12-17 | 2023-07-05 | Skarb Panstwa - Glowny Urzad Miar | System and method for simulating transformer errors in calibrating bridges for measuring transformer errors |
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Application publication date: 20190816 |
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