CN101196539A - Low energy consumption series current mutual inductor for detecting 1~750000V transformer - Google Patents
Low energy consumption series current mutual inductor for detecting 1~750000V transformer Download PDFInfo
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- CN101196539A CN101196539A CNA2007101233579A CN200710123357A CN101196539A CN 101196539 A CN101196539 A CN 101196539A CN A2007101233579 A CNA2007101233579 A CN A2007101233579A CN 200710123357 A CN200710123357 A CN 200710123357A CN 101196539 A CN101196539 A CN 101196539A
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Abstract
The invention relates to a low energy consumption series current transformator to detect 10,000-750,000 volt transformer, which can solve the problems that second open circuit operation of current transformator can produce high voltage which may endanger the safety of a person or facility, as well as bring serious heating and burning of iron core and high energy consumption. The invention comprises an iron core, a primary coil and a secondary coil. The secondary coil connects shunt-wound ammeter and voltmeter in series. One end of the ammeter and voltmeter is connected with one end of secondary coil with an open and shut valve, and the other end of the ammeter and voltmeter is connected with the other end of secondary coil with lead. One end of the open and shut valve is to connect one end of ammeter with one end of secondary coil, and the other end is to connect one end the voltmeter with one end of the secondary coil. The current transformator is six kinds of new-type current transformator in single-turn generatrix core crossing type: LMK, LMK 1, LMZ, LMZ 1, LMZJ, LMZJ 1. The primary coil connects with zero curve in a triphase power transformer in series. The invention is characterized in simple structure, low energy consumption, safe and reliable operation and easy for use.
Description
Technical field
The present invention relates to a kind of mutual inductor, particularly relate to a kind of low power consuming potline current mutual inductor of using ten thousand volts of transformers of detection 1-75 of nonlinear theory research and development.
Background technology
Shanghai, Beijing, " eelctrical engineering handbook " of nine big well-known city bindings such as Tianjin, 500 tame R﹠D institutions, universities and colleges, " motor engineering handbook " of factory's binding, " College Physics ", " electrotechnics ", " electromagnetics ", " circuit and magnetic circuit ", " electromagnetic field ", " electrodynamics ", in the works such as " quantum electrodynamics " and " mutual inductor design " to the Current Transformer Secondary open running because of following the conventional junction opinion in west: " second open circuit operation can produce several hectovolts; several kilovolts; even several ten thousand volts jeopardize the high pressure of the person and device security: iron core seriously generates heat; burn out ".So, " allow the Current Transformer Secondary open running anything but! ".World's document shows: detecting the current transformer of high pressure three-phase current, all is the live wire end that is connected to three-phase power transformer, and prolongs that linear theory with mid-term in 18th century is consistent thinks current transformer (hereinafter to be referred as TA), and second open circuit generation high pressure burns out.
But the beam that inventor Hu Cuipei instructs is gorgeous, the damp people's scientific research of bear group (current transformer non-linear test scientific research center) is through 567000 second open circuit voltage testers, proves that above-mentioned conclusion is wrong.Test result, specific as follows:
The second open circuit voltage that once moves with rated current of LQG series 30/5,50/5,80/5,100/5,150/5,200/5,300/5,400/5,500/5,600/5,800/5,1000/5,1500/5, the 2000/50 five class current transformers that 1, have been eliminated is: 12.8 volts to 85.5 volts; Its corresponding pressure drop is 2.13 volts to 0.21 volt.
2, LMK, LMK
1, LMZ, LMZ
1, LMZJ, LMZJ
1Six class new transformers, no-load voltage ratio is 150/5,200/5,300/5,400/5,500/5,600/5,800/5,1000/5,1500/5, the current transformer of 2000/5, ten kind of different no-load voltage ratio, and primary circuit is a single turn bus punching, with rated primary current operation, its LMZJ
1Series second open circuit voltage is between 2.8 volts to 36 volts, and its corresponding pressure drop is between 0.093 volt to 0.09 volt, and a pressure drop of indivedual counties product is 0.12.
3, operating voltage is that 10 kilovolts LY, LQJ, four series 30/5,40/5,50/5,60/5,80/5,100/5,150/5,200/5,300/5,400/5,500/5,600/5,800/5,1000/5,1500/5 of LFC, LFCD, 2,000,/50 six kind of current transformer move with rated primary current, and the second open circuit voltage that records 0.5 grade of current coil is between 12.7 volts to 83.6 volts; Its 3 step voltage coil second open circuit voltage is between 24.8 volts to 345 volts.Its pressure drop is 2.12 volts to 0.21 volt! All technical parameter test values proof Current Transformer Secondary open-circuit voltages are to be accompanied by development of science and technology, social progress, material renewal, structure optimization, technological change and the application parameter that constantly reduces, all existing products find never that through reaching the operation of 14 anniversaries an example burns out.
Actual measurement shows: TA second open circuit voltage is low, and dynamically internal resistance is little, and excess current is not generated heat.
Be accompanied by the progress of human boundary science-nonlinear theory of human nineteen thirties, the variation tendency that makes us recognize human soft magnetic material magnetic permeability is that the maximal value of magnetic permeability is u
Max: 2500000Gs/Oe (quoting as proof in U.S.'s quantum electrodynamics), 1500000Gs/Oe, 300000Gs/Oe, 200000Gs/Oe, 100000Gs/Oe, 12000Gs/Oe, 8000Gs/Oe must drop to permeability of vacuum, u along with the enhancing in magnetic field
0=1Gs/Os.
At above-mentioned great variety, the scientific research group is thought and definitely can not be handled as constant for above-mentioned physical quantity.Scientific research group has for this reason also been carried out the research of common used material magnetization curve, so that carry out the test of current transformer effective value, makes effective value and test value possess one-to-one relationship.This scientific research group has been used the binary differential equation, has write out 127 mathematical models that university's formula is new.This model feature is under the Current Transformer Secondary open-circuit condition, works in magnetic saturation state widely, second open circuit voltage be one at magnetic saturation state widely be parallel to the straight line of X-axis in the district of magnetic saturation widely.
At above-mentioned parameter and new discovery, scientific research group and Tsing-Hua University, Peking University, science and technology department of the China Power Ministry of Industry, Sinomania electrical engineering association, the secretary general Yuan Haibo of National Natural Science Foundation of China, the electrotechnics director of the Institute Liu Tingwen of the Chinese Academy of Sciences, the director of department of physics of Peking University, the famous physicist Tang Zhensong of Peking University gain unanimous acceptance for director's expert group has all done academic exchange and reply; About test result and conclusion also earlier after the Ministry of Education, the Department of Science and Technology, Shandong office of the Chinese Academy of Sciences did and identify and transmit; Science and technology department of Ministry of Power Industry and Sinomania electrical engineering association more specialize in and confirm.
Summary of the invention
The objective of the invention is to provides a kind of simple in structure from above-mentioned science new discovery, and energy consumption is low, safe and reliable, the low power consuming potline current mutual inductor of the convenient ten thousand volts of transformers of detection 1-75 that use.
For achieving the above object, the low power consuming potline current mutual inductor that the present invention detects ten thousand volts of transformers of 1-75 is a bus core-theaded type current transformer, it comprises iron core, primary winding, secondary coil, its special feature is secondary coil series connection reometer and voltage table parallel with one another, one end of reometer and voltage table links to each other with secondary coil one end by open and shut valve, and the other end of reometer and voltage table links to each other with the secondary coil other end by lead.So design when needing to survey voltage, is then operated open and shut valve, and voltage table is connected with secondary coil, being connected between turn-off current table and the secondary coil; When need surveying electric current, then operate open and shut valve, reometer is connected with secondary coil, being connected between off voltage table and the secondary coil; Have simple in structurely, energy consumption is low, and is safe and reliable, the convenient advantage of using.
As optimization, an end of open and shut valve is that reometer one end is linked to each other with secondary coil one end, and the other end of open and shut valve is that voltage table one end is linked to each other with secondary coil one end.The product of design like this has simple in structure, and energy consumption is low, and is safe and reliable, advantages such as convenient use.
As optimization, described current transformer is a single turn bus core-theaded type, LMK, LMK
1, LMZ, LMZ
1, LMZJ, LMZJ
1Six classes series New type of current mutual inductor; Primary winding series connection three-phase power transformer zero line.So design, primary winding series connection three-phase power transformer zero line has been broken through whole mankind's known designs scheme, does not have that Keep Clear-High Voltage and to the harm of personal safety; Have simple in structurely, energy consumption is low, and is safe and reliable, the convenient advantage of using.
After adopting above-mentioned innovative technology scheme, the low power consuming potline current mutual inductor that the present invention detects ten thousand volts of transformers of 1-75 has simple in structure, and energy consumption is low, and is safe and reliable, the convenient advantage of using.
Description of drawings
Fig. 1 is the circuit theory diagrams that the present invention detects the low power consuming potline current mutual inductor of ten thousand volts of transformers of 1-75;
Fig. 2 is low power consuming potline current mutual inductor that the present invention detects ten thousand volts of transformers of 1-75 carries out three-phase current detection to the former limit of ten thousand volts of three-phase power transformers of 1-75 circuit theory diagrams.
Embodiment
Do further explanation below in conjunction with accompanying drawing and instantiation:
As shown in Figure 1, the low power consuming potline current mutual inductor that the present invention detects ten thousand volts of transformers of 1-75 is a bus core-theaded type current transformer, it comprises iron core 1, primary winding 2, secondary coil 3, secondary coil 3 series connection reometer 5 and voltage table 4 parallel with one another, one end of reometer 5 and voltage table 4 links to each other with secondary coil 3 one ends by open and shut valve 7, and the other end of reometer 5 and voltage table 4 links to each other with secondary coil 3 other ends by lead.One end of open and shut valve 7 is that reometer 5 one ends are linked to each other with secondary coil 3 one ends, and the other end of open and shut valve 7 is that voltage table 4 one ends are linked to each other with secondary coil 3 one ends.Detect the electric current of ten thousand volts of any phases of transformer of 1-75.
As shown in Figure 2, the low power consuming potline current mutual inductor that the present invention detects ten thousand volts of transformers of 1-75 is that it also possesses following technical characterictic except that possessing the described technical characterictic of Fig. 1, that is: described current transformer is a single turn bus core-theaded type, LMK, LMK
1, LMZ, LMZ
1, LMZJ, LMZJ
1Six class New type of current mutual inductors; Primary winding series connection three-phase power transformer zero line.AO, BO among the figure, CO, the former limit of linear system tradition three-phase four-wire power supply, D be three phase windings terminal with the ground wire anchor points; AO ', BO ', CO ' are the auxiliary winding of three-phase transformer, in fact also adopt three-phase four-wire power supply; This figure utilizes six class bus straight-through current transformers the former limit of ten thousand volts of three-phase power transformers of 1-75 to be carried out the schematic diagram of three-phase current detection.The live wire of three-phase power transformer, zero line are series circuit, and the strength of current of series circuit is all identical, thereby detect electric current and have identical functions from zero line side detection electric current from the live wire end.Wherein: TA2, TA3 are identical with the TA1 wiring, are current transformers all.
Scientific research group selection LMK, LMK
1, LMZ, LMZ
1, LMZJ, LMZJ
1Six class New type of current mutual inductors, its 150/5 to 2000/5 second open circuit voltage has only 2.85 to 36V, and its pressure drop equals between the 0.093V to 0.09V.Can be the zero line that is connected to 10KV, 35KV, 110KV, 220KV, 500KV, 750KV power transformer after this low-voltage current mutual inductor transformation, and the potential winding of the application of associated electrical kilsyth basalt and watt-hour meter is still implemented according to traditional handicraft; The electric current, the voltage that detect equal the actual electrical kilsyth basalt, and the voltage table reading multiply by no-load voltage ratio.TA2, TA3 and TA1 are single turn bus straight-through current transformer, wherein divide LMK, LMK
1, LMZ, LMZ
1, LMZJ, LMZJ
1The TA of six classes 150/5～2000/5.If needing little no-load voltage ratio to change the punching number of turn by 150/5,200/5 realizes.The end of the month of watt-hour meter the electric energy number of degrees at the end of the month that are changed to this phase with TA on duty.Watt-hour meter and potential winding are still by the traditional handicraft operation.
The parallel connection of current transformer primary winding, secondary coil are forward connected and can be increased no-load voltage ratio, thereby have improved the dirigibility of product design.
Low power consuming potline current mutual inductor of the present invention (hereinafter to be referred as TA) is applied to the energy-conservation percentage analysis of ten thousand volts of power transformers of 1-75:
To a pressure drop of low power consuming current transformer 30/5TA actual measurement of the present invention is 0.093V, and a rated current is 30A, and its power attenuation is 0.093 * 30=2.79 ≈ 2.8 (W).
For former 30/5TA actual measurement is that a pressure drop is 2.56V, and a rated current is 30A, and its corresponding power attenuation is: 2.12 * 30=63.6 (W).
Energy-conservation number percent: (63.6-2.8) ÷ 63.6 * 100% ≈ 96%.
To a pressure drop of low power consuming current transformer 2000/5TA actual measurement of the present invention is 0.09V, and a rated current is 2000A, and its corresponding power attenuation is 0.09 * 2000=180 (W).
For former 2000/5TA actual measurement is that a pressure drop is 0.21V, and a rated current is 2000A, and its corresponding power attenuation is: 0.21 * 2000=420 (W).
Energy-conservation number percent: (420-180) ÷ 420 * 100% ≈ 57.14%.
In sum: low power consuming potline current transformer of the present invention is compared with the conventional current transformer, and energy-conservation amplitude is 57% Between 96%, obvious objective energy-saving effect is arranged, have more significant economic results in society.
Claims (3)
1. low power consuming potline current mutual inductor that detects ten thousand volts of transformers of 1-75, it is bus core-theaded type current transformer, it comprises iron core, primary winding, secondary coil, it is characterized in that secondary coil series connection reometer and voltage table parallel with one another, one end of reometer and voltage table links to each other with secondary coil one end by open and shut valve, and the other end of reometer and voltage table links to each other with the secondary coil other end by lead.
2. according to the described low power consuming potline current mutual inductor that detects ten thousand volts of transformers of 1-75 of claim 1, an end that it is characterized in that open and shut valve is that reometer one end is linked to each other with secondary coil one end, and the other end of open and shut valve is that voltage table one end is linked to each other with secondary coil one end.
3. according to the low power consuming potline current mutual inductor of claim 1 or ten thousand volts of transformers of 2 described detection 1-75, it is characterized in that described current transformer is a single turn bus core-theaded type, LMK, LMK
1, LMZ, LMZ
1, LMZJ, LMZJ
1Six classes series New type of current mutual inductor; The zero line of primary winding series connection three-phase power transformer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101233579A CN100549700C (en) | 2007-06-25 | 2007-06-25 | Detect the low power consuming potline current mutual inductor of ten thousand volts of transformers of 1-75 |
| PCT/CN2008/001220 WO2009000159A1 (en) | 2007-06-25 | 2008-06-24 | Low energy-consuming series current transformer for 1-1000 kv transformer detect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101233579A CN100549700C (en) | 2007-06-25 | 2007-06-25 | Detect the low power consuming potline current mutual inductor of ten thousand volts of transformers of 1-75 |
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| Publication Number | Publication Date |
|---|---|
| CN101196539A true CN101196539A (en) | 2008-06-11 |
| CN100549700C CN100549700C (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101233579A Expired - Fee Related CN100549700C (en) | 2007-06-25 | 2007-06-25 | Detect the low power consuming potline current mutual inductor of ten thousand volts of transformers of 1-75 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009000159A1 (en) * | 2007-06-25 | 2008-12-31 | Cuipei Hu | Low energy-consuming series current transformer for 1-1000 kv transformer detect |
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2007
- 2007-06-25 CN CNB2007101233579A patent/CN100549700C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009000159A1 (en) * | 2007-06-25 | 2008-12-31 | Cuipei Hu | Low energy-consuming series current transformer for 1-1000 kv transformer detect |
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| Publication number | Publication date |
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| CN100549700C (en) | 2009-10-14 |
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