CN203037723U - Measurement device of double-loop-on-same-tower power transmission line unbalanced current - Google Patents
Measurement device of double-loop-on-same-tower power transmission line unbalanced current Download PDFInfo
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- CN203037723U CN203037723U CN2012206639424U CN201220663942U CN203037723U CN 203037723 U CN203037723 U CN 203037723U CN 2012206639424 U CN2012206639424 U CN 2012206639424U CN 201220663942 U CN201220663942 U CN 201220663942U CN 203037723 U CN203037723 U CN 203037723U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 36
- 238000005259 measurement Methods 0.000 title claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 claims description 43
- 238000004891 communication Methods 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000004364 calculation method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/10—Measuring sum, difference or ratio
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Abstract
The utility model discloses a measurement device of double-loop-on-same-tower power transmission line unbalanced current. With the measurement device adopted, the problems such as inconvenient usage as well as unscientific and unreasonable testing and analysis existing in a measurement device in the prior art can be solved. The measurement device of the utility model is characterized in that each phase winding output terminal of a first three-phase current transformer (1) is correspondingly and electrically connected with corresponding phase winding input terminals of the primary side of a first three-phase reactance transformer (3); each output terminal of the secondary side of the first three-phase reactance transformer (3) is electrically connected with a CPU (6) through an analog-to-digital conversion circuit (5); each phase winding output terminal of a second three-phase current transformer (2) is correspondingly and electrically connected with corresponding phase winding input terminals of the primary side of a second three-phase reactance transformer (4); and each output terminal of the secondary side of the second three-phase reactance transformer (4) is electrically connected with the CPU (6) through the analog-to-digital conversion circuit (5). The measurement device of the utility model provides a scientific, reasonable and effective means for the testing and analysis on the degree of unbalance of double-loop-on-same-tower power transmission line current.
Description
Technical field
The utility model relates to a kind of measurement mechanism of same tower double back transmission line out-of-balance current.
Background technology
Along with the fast development of electrical network, the day in transmission line of electricity corridor is becoming tight, and same tower double back transmission line has obtained using more widely.The quick growth of load makes that weak point or the ultrashort transmission line of electricity less than hundred kilometers is more and more in the electrical network; According to the designing requirement of transmission line of electricity, do not replace during completely less than 100 kilometers at transmission line of electricity.Along with increasing of weak point (or ultrashort) circuit and cut-offfing of some original full transposition circuits; and many common-tower double-returns all multifactor influences such as circuit puts into operation in succession that do not replace; cause partial electric grid to cause three-phase current obviously uneven because electric parameter is asymmetric; the misoperation that some has caused relay protection and automatic safety device has had a strong impact on the safe operation of electrical network.Direct measurement mechanism at the same tower double back transmission line out-of-balance current is not arranged at present as yet, have the problem not scientific and reasonable to the degree of unbalancedness test analysis of same tower double back transmission line electric current simultaneously yet.
Summary of the invention
The utility model provides a kind of measurement mechanism of same tower double back transmission line out-of-balance current, has solved the inconvenient and not scientific and reasonable technical matters of test analysis of use that existing measurement mechanism exists.
The utility model overcomes the above problems by following scheme:
A kind of measurement mechanism of same tower double back transmission line out-of-balance current, comprise first threephase current transformer that arranges on common-tower double-return first transmission line of electricity, second threephase current transformer that arranges on common-tower double-return second transmission line of electricity, the first three-phase electricity reactance transformer, second three-phase electricity reactance transformer and the CPU, corresponding being electrically connected of corresponding phase winding input end of each phase winding output terminal of first threephase current transformer and the primary side of the first three-phase electricity reactance transformer, each output terminal of the secondary side of the first three-phase electricity reactance transformer is electrically connected by analog to digital conversion circuit and CPU, corresponding being electrically connected of corresponding phase winding input end of each phase winding output terminal of second threephase current transformer and the primary side of the second three-phase electricity reactance transformer, each output terminal of the secondary side of the second three-phase electricity reactance transformer is electrically connected by analog to digital conversion circuit and CPU, AC power is electrically connected with the input end of stabilized voltage supply, the output terminal of stabilized voltage supply is electrically connected with CPU and analog to digital conversion circuit respectively, is connected with liquid crystal display circuit at CPU.
Be connected with communication interface circuit on the CPU.
The utility model provides a kind of scientific and reasonable effective means for degree of unbalancedness test and the analysis of existing same tower double back transmission line electric current.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
A kind of measurement mechanism of same tower double back transmission line out-of-balance current, comprise first threephase current transformer 1 that arranges on common-tower double-return first transmission line of electricity, second threephase current transformer 2 that arranges on common-tower double-return second transmission line of electricity, the first three-phase electricity reactance transformer 3, second three-phase electricity reactance transformer 4 and the CPU, corresponding being electrically connected of corresponding phase winding input end of each phase winding output terminal of first threephase current transformer 1 and the primary side of the first three-phase electricity reactance transformer 3, each output terminal of the secondary side of the first three-phase electricity reactance transformer 3 is electrically connected with CPU6 by analog to digital conversion circuit 5, corresponding being electrically connected of corresponding phase winding input end of each phase winding output terminal of second threephase current transformer 2 and the primary side of the second three-phase electricity reactance transformer 4, each output terminal of the secondary side of the second three-phase electricity reactance transformer 4 is electrically connected with CPU6 by analog to digital conversion circuit 5, AC power 10 is electrically connected with the input end of stabilized voltage supply 9, the output terminal of stabilized voltage supply 9 is electrically connected with CPU6 and analog to digital conversion circuit 5 respectively, is connected with liquid crystal display circuit 8 at CPU6.
Be connected with communication interface circuit 7 on the CPU6.
Concrete enforcement of the present utility model may further comprise the steps content:
The first step, with the three-phase current of first threephase current transformer 1 of common-tower double-return first transmission line of electricity (
,
,
,
), and the second threephase current transformer 2(of common-tower double-return second transmission line of electricity
,
,
,
) be input in the proving installation;
Second step, calculate maximum/minimum in the three-phase current effective value of first transmission line of electricity, second transmission line of electricity;
The 3rd goes on foot, calculates according to following formula positive sequence, negative phase-sequence, the zero-sequence current amplitude of first transmission line of electricity, second transmission line of electricity
,
,
,
,
,
，
Wherein:
Be the vector calculus factor;
The 4th goes on foot, calculates according to following formula the current imbalance degree of first transmission line of electricity, second transmission line of electricity;
1) computing method of current imbalance degree in the employing Chinese national standard:
Three-phase current unbalance degree h1=(negative-sequence current/forward-order current) * 100%;
2) adopt mean value method:
The maximum effective value of three-phase current unbalance degree h2=(-minimum effective value)/mean value) * 100%;
The 5th the step, calculate comprehensive degree of unbalancedness according to following formula:
Comprehensive degree of unbalancedness hph=(h1+h2)/2;
The 6th step, data recording and output:
Can be connected with computing machine and recording real-time data by data-interface of the present utility model; Can show real time data at display window and the computer screen of measurement mechanism simultaneously: three-phase current unbalance degree h1; Three-phase current unbalance degree h2; Comprehensive degree of unbalancedness hph.
A, B in the threephase current transformer 1 of first transmission line of electricity, C are connected to DKB1A, the DKB1B of the first three-phase electricity reactance transformer 3, the * end of DKB1C primary side mutually respectively, and the N in the threephase current transformer 1 of first transmission line of electricity is connected with the non-* end of the primary side of DKB1A, DKB1B, DKB1C;
A, B, C are connected to the * end of primary side of DKB2A, DKB2B, the DKB2C of the second three-phase electricity reactance transformer 4 mutually respectively in the threephase current transformer 2 of second transmission line of electricity, and the N in the threephase current transformer 2 of second transmission line of electricity holds with the non-* of the primary side of DKB2A, the DKB2B of the second three-phase electricity reactance transformer 4, DKB2C and is connected;
The * end of the secondary side of the * end of DKB1A, DKB1B, DKB1C secondary side and DKB2A, DKB2B, DKB2C is input in the analog to digital conversion circuit 5; The non-* end of the non-* end of the secondary side of DKB1A, DKB1B, DKB1C and the secondary side of DKB2A, DKB2B, DKB2C links to each other with ground.
Analog to digital conversion circuit 5 is electrically connected with CPU6 to 12 bit processors; CPU6 and program storage are electrically connected with liquid crystal display circuit 8 and communication interface circuit 7.
Stabilized voltage supply 9 provides stabilized voltage supply for CPU6 and analog to digital conversion circuit 5.
Claims (2)
1. the measurement mechanism of a same tower double back transmission line out-of-balance current, comprise first threephase current transformer (1) that arranges on common-tower double-return first transmission line of electricity, second threephase current transformer (2) that arranges on common-tower double-return second transmission line of electricity, the first three-phase electricity reactance transformer (3), second three-phase electricity reactance transformer (4) and the CPU, it is characterized in that, corresponding being electrically connected of corresponding phase winding input end of each phase winding output terminal of first threephase current transformer (1) and the primary side of the first three-phase electricity reactance transformer (3), each output terminal of the secondary side of the first three-phase electricity reactance transformer (3) is electrically connected by analog to digital conversion circuit (5) and CPU(6), corresponding being electrically connected of corresponding phase winding input end of each phase winding output terminal of second threephase current transformer (2) and the primary side of the second three-phase electricity reactance transformer (4), each output terminal of the secondary side of the second three-phase electricity reactance transformer (4) is electrically connected by analog to digital conversion circuit (5) and CPU(6), AC power (10) is electrically connected with the input end of stabilized voltage supply (9), the output terminal of stabilized voltage supply (9) respectively with CPU(6) and analog to digital conversion circuit (5) be electrically connected, at CPU(6) be connected with liquid crystal display circuit (8).
2. the measurement mechanism of a kind of same tower double back transmission line out-of-balance current according to claim 1 is characterized in that, is connected with communication interface circuit (7) on CPU(6).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206639424U CN203037723U (en) | 2012-12-06 | 2012-12-06 | Measurement device of double-loop-on-same-tower power transmission line unbalanced current |
| PCT/CN2013/000984 WO2014086088A1 (en) | 2012-12-06 | 2013-08-22 | Device for measuring unbalanced current of common-tower double-circuit power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206639424U CN203037723U (en) | 2012-12-06 | 2012-12-06 | Measurement device of double-loop-on-same-tower power transmission line unbalanced current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037723U true CN203037723U (en) | 2013-07-03 |
Family
ID=48689834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206639424U Expired - Fee Related CN203037723U (en) | 2012-12-06 | 2012-12-06 | Measurement device of double-loop-on-same-tower power transmission line unbalanced current |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203037723U (en) |
| WO (1) | WO2014086088A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795074A (en) * | 2014-01-18 | 2014-05-14 | 国家电网公司 | Method for adjusting electric transmission line wire phase sequence arrangement according to current phase angles and amplitude values |
| WO2014086088A1 (en) * | 2012-12-06 | 2014-06-12 | 国家电网公司 | Device for measuring unbalanced current of common-tower double-circuit power transmission line |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7439753B2 (en) * | 2005-11-23 | 2008-10-21 | Zippy Technology Corp. | Inverter test device and a method thereof |
| CN201029000Y (en) * | 2007-03-29 | 2008-02-27 | 王国荣 | Unbalanced propulsion current analyzer |
| JP5239657B2 (en) * | 2008-09-09 | 2013-07-17 | 東京電力株式会社 | Load amount estimation method, load curve derivation method, load curve derivation device, and load amount estimation device |
| CN101750527A (en) * | 2008-12-16 | 2010-06-23 | 季小明 | Unbalanced current detection device |
| CN201637791U (en) * | 2009-12-31 | 2010-11-17 | 张振旗 | Online monitoring system for high-voltage shunt capacitor |
| CN101769958B (en) * | 2010-02-11 | 2012-07-25 | 北京国能子金电气技术有限公司 | High-voltage capacitor bank branch current monitoring device |
| CN203037723U (en) * | 2012-12-06 | 2013-07-03 | 山西省电力公司电力科学研究院 | Measurement device of double-loop-on-same-tower power transmission line unbalanced current |
-
2012
- 2012-12-06 CN CN2012206639424U patent/CN203037723U/en not_active Expired - Fee Related
-
2013
- 2013-08-22 WO PCT/CN2013/000984 patent/WO2014086088A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014086088A1 (en) * | 2012-12-06 | 2014-06-12 | 国家电网公司 | Device for measuring unbalanced current of common-tower double-circuit power transmission line |
| CN103795074A (en) * | 2014-01-18 | 2014-05-14 | 国家电网公司 | Method for adjusting electric transmission line wire phase sequence arrangement according to current phase angles and amplitude values |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014086088A1 (en) | 2014-06-12 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20181206 |
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| CF01 | Termination of patent right due to non-payment of annual fee |