CN103698596B - A kind of power system high voltage meter and method - Google Patents
A kind of power system high voltage meter and method Download PDFInfo
- Publication number
- CN103698596B CN103698596B CN201410011663.3A CN201410011663A CN103698596B CN 103698596 B CN103698596 B CN 103698596B CN 201410011663 A CN201410011663 A CN 201410011663A CN 103698596 B CN103698596 B CN 103698596B
- Authority
- CN
- China
- Prior art keywords
- voltage
- insulator chain
- measurement apparatus
- power system
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 45
- 239000012212 insulator Substances 0.000 claims abstract description 33
- 210000000538 tail Anatomy 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 239000004020 conductor Substances 0.000 abstract description 12
- 230000005611 electricity Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000036772 blood pressure Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000005350 ferromagnetic resonance Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
A kind of power system high voltage meter and method, by measuring the tail voltage of insulator chain, linearly calculate the virtual voltage of high-pressure electrified conductor, thus realize indirect measurement high-tension to power system.The method includes measurement apparatus, described measurement apparatus includes being sequentially connected with: dividing potential drop and calibration circuit, sampling hold circuit, A/D change-over circuit, central processing unit, communication interface circuit, measurement apparatus is connected on the cauda of insulator chain by the heart yearn of coaxial cable, measuring the tail voltage of insulator chain, the shielding line of coaxial cable is directly connected to shaft tower.One power system high voltage meter of the present invention and method, by being the tail pressure of insulator chain, this device dielectric level is greatly reduced, and its volume and cost are greatly lowered；Eradicate the significant trouble hidden danger in Operation of Electric Systems, it is ensured that the person and the safety of equipment simultaneously.
Description
Technical field
One power system high voltage meter of the present invention and method, relate to power system high voltage measuring field.
Background technology
The effect of voltage transformer is: electric power high voltage relation transformation in proportion is become 100V or more low-grade standard two
Secondary voltage, for secondary devices such as protection, metering, instrument.Meanwhile, use voltage transformer can be by high voltage and electrician
Make personnel and secondary device isolation.Can be divided into by voltage transformation principle: electromagnetic type, condenser type and photo-electric three major types.
Electromagnetic potential transformer according to electromagnetic induction principle voltage of transformation, principle phase complete with basic structure and transformator
Seemingly, mainly it is made up of first and second coil, iron core and insulation.When applying a voltage U1 on a winding, in iron core just
Produce a magnetic flux φ, according to the law of electromagnetic induction, then in Secondary Winding, just produce a secondary voltage U2.Change once or
The number of turn of Secondary Winding, can produce different primary voltages and secondary voltage ratio, and this just can form mutual induction of voltage the most on year-on-year basis
Device.China is many to be used at 110kV and following electric pressure.Capacitance type potential transformer is according to series capacitance voltage divider principle conversion electricity
Pressure, is collectively constituted by capacitive divider and electromagnetic potential transformer, first again by electromagnetic transformer after capacitance partial pressure, becomes
Low-voltage, is used in earth neutral system and is used as voltage measurement, power measurement, relay protection and carrier communication.Photo-electric electricity
Pressure transformer realizes voltage sensor by bubble Ke Ersi effect (electro-optical conversion), and it utilizes the bubble Ke Ersi effect of electric field, light
Under electric field action, birefringent phenomenon occur, two kinds of specific refractivities and electric field intensity are directly proportional, and become high light by test plate
Signal exports, and the most succeeds in developing, just in popularization and application.
And voltage transformer of the prior art, either electromagnetic type or condenser type, be all likely to occur single-phase earthing therefore
Barrier or ferromagnetic resonance problem.If three-phase voltage raises simultaneously, and exceed line voltage (pointer can swing to head), then it is also possible that
Frequency dividing or high-frequency resonant problem.Thus cause insulation accelerated aging, occur puncturing, form transformer first side winding generation turn-to-turn
, even there is the problems such as thermal expansion blast in short circuit.Voltage Transformer Damages phenomenon warp in power system that above-mentioned reason causes
Often occur.
Central China University of Science and Technology Xu Yan, Xihua Univ appoints dawn, Fang Chunen et al. research and has manufactured experimently Resistive Voltage Transformer.
It directly measures high voltage by resitstance voltage divider, Resistive Voltage Transformer it is crucial that resitstance voltage divider, its core is electricity
The voltage endurance capability of resistance.Additionally, this resistance also needs high value and high stability.At present, the metal film resistor value of high pressure, high resistance type
Up to 200 M Ω, maximum operating voltage is up to 25kV, but its pulsating load less stable, stand power supply grid lightning impulse
Or after normal operating impulse voltage, resistance can change.Metal oxidation resistance Standard resistance range is the least, and wire-wound resistor hinders
Value about 5 M Ω, a few hectovolt of maximum operating voltage, it is also unsuitable for the purposes of high resistant high pressure.Along with material technology and electronic technology
Development, newly occurs in that a kind of thick-film resistor that can be made into high-voltage high resistance, and it can be by different resistance slurry formula with corresponding
Processing technology, can obtain the resistive element of different performance requirement.Its maximum value up to 2G Ω, maximum operating voltage up to
40kV(AC value).But this thick-film resistor need customization, relatively costly, and the 1000KV high pressure of relative power system and
Speech, it is pressure is nowhere near.
Summary of the invention
For solving the defect that existing voltage transformer dielectric level is high, cost is high.The present invention provides a kind of power system high
Voltage measuring apparatus and method, by being the tail pressure of insulator chain, this device dielectric level is greatly reduced, and its volume and cost are big
Amplitude reduction；Eradicate the significant trouble hidden danger in Operation of Electric Systems, it is ensured that the person and the safety of equipment simultaneously.
The technical scheme that the present invention takes is: a kind of power system high voltage measuring method, by measuring insulator chain
Tail voltage, linearly calculates the virtual voltage of high-pressure electrified conductor, thus realizes indirect measurement high-tension to power system.
A kind of power system high voltage meter, described measurement apparatus includes being sequentially connected with: dividing potential drop and calibration circuit,
Sampling hold circuit, A/D change-over circuit, central processing unit, communication interface circuit, measurement apparatus is by the heart yearn of coaxial cable even
Being connected on the cauda of insulator chain, measure the tail voltage of insulator chain, the shielding line of coaxial cable is directly connected to shaft tower.
Include inside measurement apparatus: electric resistance partial pressure or capacitance partial pressure circuit, for dropping into the measurement voltage of about 5V, survey
Amount device directly monitors the magnitude of voltage of measurement point.
Described measurement point is positioned at a centre position for the cauda upper surface of insulator chain.
High-pressure electrified conductor is bus or wire.
Measurement apparatus is used for measuring busbar voltage.
Bonded by seccotine between heart yearn and the cauda of coaxial cable, or straight with the cauda of the insulator chain of belt lacing
Connect in succession.
Dividing potential drop and calibration circuit are used for: measuring point voltage is become within 5V, adjustable, is easy to the simulation electricity of A/D conversion
Pressure signal.
One power system high voltage meter of the present invention and method, and the fundamental difference of existing High-Voltage Measurement Technology
Be: existing High-Voltage Measurement Technology, the most traditional electromagnetic type and capacitance type potential transformer, or research in photo-electric and
Resistive Voltage Transformer, they the most directly measure the virtual voltage of high-pressure electrified conductor, it is therefore desirable to the highest dielectric level,
The volume of transformer is big, and cost is high.And the present invention is by measuring tail pressure on insulator chain, the most linearly to calculate high pressure belt
Voltage on electric conductor, it utilizes existing insulator chain to realize insulation and dividing potential drop.Therefore, the dielectric level that measurement apparatus requires
Low, volume is little, low cost.
One power system high voltage meter of the present invention and method, technique effect is as follows:
1), the present invention measures is the tail pressure of insulator chain, and measuring point voltage the lowest (a few hectovolt) is led relative to directly measuring
For the high pressure (10kV～1000kV) on side, the dielectric level of measurement apparatus is greatly reduced, the volume of measurement apparatus and cost
By jumbo reduction.
2), the measurement apparatus of the present invention magnitude of voltage being to be divided to about 5V measured directly, and measure be natural electricity
Pressure signal and non-power signals, be especially suitable for being directly prepared into electronic type voltage transformer, thus and following intelligent grid and intelligence
Can transformer station directly integrate with.
3), the high pressure of measurement apparatus of the present invention and primary side insulated by ready-made insulator chain, reduce cost further,
And measurement apparatus internal short-circuit will not produce big electric current, also will not produce ferromagnetic resonance, can eradicate in Operation of Electric Systems
Significant trouble hidden danger, it is ensured that the person and the safety of equipment.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is measurement apparatus scheme of installation of the present invention.
Detailed description of the invention
A kind of power system high voltage meter and method, by measuring the tail voltage of insulator chain 4, carry out linear push
Calculate the virtual voltage of high-pressure electrified conductor, thus realize indirect measurement high-tension to power system.The method includes measuring dress
Putting 1, described measurement apparatus 1 includes being sequentially connected with: dividing potential drop and calibration circuit, sampling hold circuit, A/D change-over circuit, central authorities
Processor, communication interface circuit, measurement apparatus 1 is connected on the cauda 3 of insulator chain 4 by the heart yearn of coaxial cable 2, measures
The tail voltage of insulator chain 4, the shielding line of coaxial cable 2 is directly connected to shaft tower 6.Between heart yearn and the cauda 3 of coaxial cable 2
Can be bonded by seccotine, it is also possible to and the insulator of special belt lacing is direct-connected.Described high-pressure electrified conductor 5 be bus or
Person's wire.
After installation, regulation measurement apparatus 1 on calibration knob or adjustable resistance, make measurement apparatus 1 measured value and
The virtual voltage (being surveyed by standard mutual inductor separately) of high-pressure electrified conductor 5 is consistent；If regulation measurement apparatus 1 is Pure numerical form
If, manually setting measured value by button is virtual voltage (being surveyed by standard mutual inductor separately), then by device
The Automatic Program in portion calculates actual ratio coefficient。
Dividing potential drop and calibration circuit are used for: measuring point voltage is become within 5V, adjustable, is easy to the simulation electricity of A/D conversion
Pressure signal；Sampling hold circuit is for the voltage signal discretization by input；A/D translation circuit is for the most discrete voltage letter
Number digitized；Central processing unit, for the digital voltage signal sequence of input being restored, the most linearly calculates electrification in high voltage and leads
The actual voltage value of body 5, is finally sent to communication interface circuit measurement result.According to the needs of load, communication interface circuit
Can be the various ways such as serial ports, parallel port, ilink.Central processing unit is provided with corresponding software, mainly includes data acquisition
The data field processing routine such as program, filtering, eigenvalue: the data such as the amplitude of voltage, initial phase, frequency, virtual voltage process journey
Sequence, process of measurement and signal procedure.
Operation principle:
Insulator chain 4, when normally working, carries the insulating effect between high pressure and ground, and this insulating effect is to pass through
The highest insulation resistance of insulator chain 4 realizes, and the insulation resistance of insulator chain 4 can reach more than 100G Ω.In string
Every insulator on all share certain voltage, the voltage-to-ground of every insulator also with insulator position in string and
Change, wherein the voltage-to-ground near the insulator of high-pressure electrified conductor 5 side is the highest, near the electricity over the ground of the cauda 3 of earth point
Press minimum, confirmed by experiment and theoretical derivation: the voltage-to-ground value of the arbitrary fixing measuring point of insulator surface is with on conductor
Voltage and linear change, say, that measure in string the voltage of certain fixing point on the surface of certain sheet insulator, become by linear
Change the actual voltage value that just counter can release high-pressure electrified conductor, as shown in Figure 1.If the virtual voltage of power system is U, this electricity
Being pressed on the cauda 3 of insulator chain 4 voltage produced is, then
In formula, proportionality coefficientIt is decided by distribution capacity between the insulation resistance of insulator chain and sheet, in running voltageUnder,
Can be by measuringIt is calculated.
The present invention is in order to reduce dielectric level and the cost of measurement apparatus 1, and the voltage of measuring point is the lowest, therefore
Measure some A and may be selected in the centre position of cauda 3 upper surface.The voltage-to-ground measuring some A typically has hundreds of kilovolt of even going up, also
Inconvenience is directly measured, and therefore can arrange bleeder circuit inside measurement apparatus 1, directly to drop into the measurement voltage of about 5V,
Measurement apparatus 1 directly monitors the magnitude of voltage measured at some A.If the voltage measuring value after secondary blood pressure lowering is, blood pressure lowering coefficient is
, then
Therefore, the real-time voltage value that can be calculated on high-pressure electrified conductor by linear inverse transformation algorithm is
In formula, blood pressure lowering coefficientIt is decided by the bleeder circuit within device.It is zero owing to measuring the electric current at some A, the most just
It is to say, the simply voltage signal of measurement, and there is no power.Therefore measurement apparatus 1 is suitable for making electronic type.Table on cauda 3
On face, the voltage-to-ground of diverse location differs.Therefore the change of point position is very big, also on the impact of the anti-high-voltage value pushed away
That is, different point positions, correspond to different linear transform coefficients, in order to determine this conversion coefficient, measuring dress
Put and on 1, have calibration knob (or adjustable resistance or button), calibration (and the standard mutual inductor of measurement apparatus during for running for the first time
The value comparison of device), if Pure numerical form, can manually setOr。
Claims (2)
1. a power system high voltage meter, it is characterised in that described measurement apparatus (1) includes being sequentially connected with: point
Pressure and calibration circuit, sampling hold circuit, A/D change-over circuit, central processing unit, communication interface circuit, measurement apparatus (1) is passed through
The heart yearn of coaxial cable (2) is connected on the cauda (3) of insulator chain (4), measures the tail voltage of insulator chain (4), coaxially
The shielding line of cable (2) is directly connected to shaft tower (6)；Measurement apparatus (1) is internal to be included: electric resistance partial pressure or capacitance partial pressure circuit,
For dropping into the measurement voltage of about 5V, measurement apparatus (1) directly monitors the magnitude of voltage of measurement point (A)；Described measurement point (A)
It is positioned at the centre position of cauda (3) upper surface of insulator chain (4).
2. a kind of power system high voltage meter, it is characterised in that the heart yearn of coaxial cable (2)
And bonded by seccotine between cauda (3), or it is directly connected to the cauda (3) of the insulator chain (4) of belt lacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410011663.3A CN103698596B (en) | 2014-01-10 | 2014-01-10 | A kind of power system high voltage meter and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410011663.3A CN103698596B (en) | 2014-01-10 | 2014-01-10 | A kind of power system high voltage meter and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103698596A CN103698596A (en) | 2014-04-02 |
| CN103698596B true CN103698596B (en) | 2016-11-16 |
Family
ID=50360193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410011663.3A Expired - Fee Related CN103698596B (en) | 2014-01-10 | 2014-01-10 | A kind of power system high voltage meter and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103698596B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501549B (en) * | 2019-07-19 | 2021-08-17 | 武汉大学 | Method for measuring impact high voltage of tower body |
| CN111650545B (en) * | 2020-07-01 | 2022-04-19 | 长园共创电力安全技术股份有限公司 | Calibration method, device, equipment and medium for high-voltage live display device |
| CN112964927A (en) * | 2021-02-05 | 2021-06-15 | 南方电网科学研究院有限责任公司 | Data acquisition system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200639U (en) * | 1988-01-22 | 1988-11-23 | 水电部武汉高压研究所 | Spread voltage measuring device for dc transmission line insulator |
| CN1987500A (en) * | 2006-12-21 | 2007-06-27 | 三峡大学 | On-line monitoring system method for overhead line by potential method |
| CN102680758A (en) * | 2012-05-14 | 2012-09-19 | 华中科技大学 | Digitalized optical fiber voltage transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02159576A (en) * | 1988-12-12 | 1990-06-19 | Furukawa Electric Co Ltd:The | Measuring apparatus of insulator shared voltage |
-
2014
- 2014-01-10 CN CN201410011663.3A patent/CN103698596B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200639U (en) * | 1988-01-22 | 1988-11-23 | 水电部武汉高压研究所 | Spread voltage measuring device for dc transmission line insulator |
| CN1987500A (en) * | 2006-12-21 | 2007-06-27 | 三峡大学 | On-line monitoring system method for overhead line by potential method |
| CN102680758A (en) * | 2012-05-14 | 2012-09-19 | 华中科技大学 | Digitalized optical fiber voltage transformer |
Non-Patent Citations (1)
| Title |
|---|
| 一种测量绝缘子串电位分布的传感器;江秀臣 等;《高电压技术》;20071130;第33卷(第11期);第100-104、107页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103698596A (en) | 2014-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9018938B2 (en) | Integrated device suspended at high voltage potential for power energy metering and protection of distribution network | |
| Zhu et al. | Non-contact capacitive-coupling-based and magnetic-field-sensing-assisted technique for monitoring voltage of overhead power transmission lines | |
| CN104330677B (en) | A kind of electronic current mutual inductor experimental rig and test method | |
| CN106199118B (en) | Capacitor voltage-dividing type zero sequence voltage transformer with power output | |
| CN106771469A (en) | Controller switching equipment merges three-phase intelligent Current Voltage integration transformers with one or two times | |
| CN103698596B (en) | A kind of power system high voltage meter and method | |
| CN211236675U (en) | Calibration device for automatic tuning controller of arc suppression coil | |
| CN108169575A (en) | The test device and method of a kind of CVT capacitances dielectric loss and capacitance | |
| Zhang et al. | Design and test of a new high-current electronic current transformer with a Rogowski coil | |
| CN104007294B (en) | Overhead line parameter measurement wiring device | |
| CN205539343U (en) | Integration probe is put in office based on electric capacity divides platen press VFTO measuring transducer | |
| CN102169754B (en) | Current and voltage transformer | |
| CN107449987B (en) | Based on the test method of transferring the files for not tearing 750 kv transformer high pressure lead technologies open | |
| CN103777057A (en) | True-root-mean-square capacitive current tester | |
| Kaczmarek | Secondary current distortion of inductive current transformer in conditions of dips and interruptions of voltage in the power line | |
| CN103575959B (en) | Novel non-contact three-phase current measuring method | |
| CN209280789U (en) | A kind of device measuring capacitance current by arc suppression coil | |
| CN108548982A (en) | A kind of test method of capacitance current, apparatus and system | |
| CN108548983A (en) | A kind of test method of capacitance current, apparatus and system | |
| CN104375031A (en) | On-line measurement device for power supply system surge protection device insulation resistance | |
| CN108535528A (en) | A kind of neutral point capacitive current testing methods based on frequency sweep method, apparatus and system | |
| CN207571186U (en) | A kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type | |
| CN102709045A (en) | Combined mutual inductor | |
| Sandler et al. | Measurement Systems for High Voltage Transients in Power Networks | |
| Varskyi et al. | Design features of electromagnetic transducer as a part of electronic current transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161116 |