CN108593997A - A kind of voltage measuring apparatus and method suitable for transmission line of electricity - Google Patents
A kind of voltage measuring apparatus and method suitable for transmission line of electricity Download PDFInfo
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- CN108593997A CN108593997A CN201810563109.4A CN201810563109A CN108593997A CN 108593997 A CN108593997 A CN 108593997A CN 201810563109 A CN201810563109 A CN 201810563109A CN 108593997 A CN108593997 A CN 108593997A
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- grading ring
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 230000005611 electricity Effects 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title abstract description 7
- 238000005070 sampling Methods 0.000 claims abstract description 60
- 239000002184 metal Substances 0.000 claims abstract description 43
- 229910052751 metal Inorganic materials 0.000 claims abstract description 43
- 239000012212 insulator Substances 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010931 gold Substances 0.000 claims abstract description 14
- 229910052737 gold Inorganic materials 0.000 claims abstract description 14
- 238000000691 measurement method Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention discloses a kind of voltage measuring apparatus and method suitable for transmission line of electricity.Measuring device includes：Insulator, grading ring, measuring circuit, wireless transmitter or electrooptic conversion module, voltage display；Transmission line of electricity to be measured is supported by the gold utensil of insulator end；Grading ring is fixed on by connecting rod and fixed ring socket on the gold utensil of insulator end；Metal sensor piece is the thin slice cut down from grading ring side surface, and is separated the cut surface of metal sensor piece and grading ring by insulating film；Sampling resistor is located inside grading ring, and one end is connect with metal sensor piece, and the inner surface connection of the other end and grading ring, the both ends of sampling resistor are connected in parallel to one end of cable, and the other end of cable is connected to measuring circuit；Wireless transmitter or electrooptic conversion module are used for transmission resistive voltage signal；Voltage display is used to be calculated and be shown the voltage value of transmission line of electricity according to the resistive voltage value of reception.The measuring device of the present invention has the advantages that small, at low cost.
Description
Technical field
The present invention relates to voltage measurement fields, more particularly to a kind of voltage measuring apparatus suitable for transmission line of electricity and side
Method.
Background technology
With the increase of electricity demand, the scale of power grid goes from strength to strength, and remote powerful technology of transmission of electricity is more first
Into the voltage class of electric system is also continuously improved, and the structure of power grid is also more intricate.In the operation of electric system,
In order to ensure the safe and stable operation of power grid, often the parameters such as voltage, electric current are monitored in real time.Currently used high electricity
It presses in measurement method and equipment, electromagnetic potential transformer will appear ferromagnetic saturation at higher voltages, and output voltage is in non-thread
The problems such as property, transient response is poor；And capacitance type potential transformer insulate difficulty under high voltages, can also be brought to system it is inflammable easily
The potential risks such as quick-fried.These voltage measuring apparatus can not be installed on the line, be can be only installed in substation since volume is big.
Transmission line of electricity is the important component of electric system energy transmission.Since the distance in the space of its leap is very long, from several kilometers
Differed to more than 1,000 kilometers, thus its inspection of line, repair and it is extremely difficult in on-line condition monitoring.Installation volume on the line
It is small, low-cost, voltage measuring apparatus can be installed everywhere have great significance for the safe and stable operation of electric system.
Invention content
The object of the present invention is to provide a kind of voltage measuring apparatus and method suitable for transmission line of electricity, to realize power transmission line
The voltage measurement on road.
To achieve the above object, the present invention provides following schemes：
A kind of voltage measuring apparatus suitable for transmission line of electricity, the measuring device include：Insulator, grading ring, sampling
Resistance, metal sensor piece, measuring circuit, voltage display；
The transmission line of electricity to be measured is fixed on the insulator end by the gold utensil of the insulator end；
The grading ring is fixed on by connecting rod and fixed ring socket on the gold utensil of the insulator end；It is described to press
Ring is connect by cable with the input terminal of the measuring circuit；Include sampling resistor and metal sensor piece inside the grading ring；
The metal sensor piece is the thin slice cut down from the grading ring side surface, and the metal sensor piece is pasted on by stick
At corresponding cut surface, and the cut surface of the metal sensor piece and the grading ring is separated by insulating film；The metal
Vane is connect by conducting wire with the first connecting pin of the sampling resistor, the inner surface of the grading ring and the sampling resistor
Second connection end connection, the first connecting pin of the sampling resistor and second connection end are connected in parallel to one end of the cable, institute
The other end for stating cable is connected to the input terminal of the measuring circuit；
The measuring circuit is used to measure the voltage value of the grading ring internal sample resistance；
The voltage display is located at receiving terminal, and the voltage display is used for according to the grading ring internal sample resistance
Voltage value the voltage measuring value of the transmission line of electricity is calculated and be shown.
Optionally, the measuring device further includes：Wireless transmitter or electrooptic conversion module；
The output end of the measuring circuit is connect with the input terminal of the wireless transmitter, and the wireless transmitter passes through hair
The voltage value that the measuring circuit measures is transmitted to the voltage display of receiving terminal by the radio wave penetrated；
Alternatively, the output end of the measuring circuit is connect with the input terminal of the electrooptic conversion module, the electro-optic conversion
Module is by OPGW optic cable by optical signal transmission that the electric signal for the voltage value that the measuring circuit measures is converted into connecing
The voltage display of receiving end.
Optionally, the sampling resistor Standard resistance range inside the grading ring is 0.1M Ω~200M Ω.
Optionally, the insulating film is Teflom Insulation Material.
The present invention also provides a kind of voltage measurement method suitable for transmission line of electricity, the measurement method includes：
Obtain the voltage value for the sampling resistor that measuring circuit measures in measuring device；The measuring device includes：Insulator,
Grading ring, sampling resistor, metal sensor piece, measuring circuit, voltage display；The transmission line of electricity to be measured passes through the insulator
The gold utensil of end is fixed on the insulator end；The grading ring is fixed on the insulation by connecting rod and fixed ring socket
On the gold utensil of sub- end；The grading ring is connect by cable with the input terminal of the measuring circuit；Packet inside the grading ring
Include sampling resistor and metal sensor piece；The metal sensor piece is the thin slice cut down from the grading ring side surface, described
Metal sensor piece is pasted on by stick at corresponding cut surface, and is pressed the metal sensor piece with described by insulating film
The cut surface of ring separates；The metal sensor piece is connect by conducting wire with the first connecting pin of the sampling resistor, described to press
The inner surface of ring is connect with the second connection end of the sampling resistor, the first connecting pin of the sampling resistor and second connection end
It is connected in parallel to one end of the cable, the other end of the cable is connected to the input terminal of the measuring circuit；
Determine the proportionality coefficient of sampling resistor voltage value and transmission line of electricity voltage value to be measured；
According to the voltage value of the proportionality coefficient and the sampling resistor, the voltage value U of the transmission line of electricity to be measured is determined,
U=kU0, wherein U0For the voltage value of the sampling resistor, k is the proportionality coefficient, and U is the voltage of the transmission line of electricity to be measured
Value.
Optionally, the proportionality coefficient for obtaining sampling resistor voltage value and transmission line of electricity voltage value to be measured, specifically includes：
According to
Determine the proportionality coefficient k of sampling resistor voltage value and transmission line of electricity voltage value to be measured, wherein R0Indicate adopting for the sampling resistor
Sample resistance value, f indicate frequency, ε0Indicate that the dielectric constant of air, R indicate the radius of the transmission line of electricity to be measured, described in S is indicated
The surface area of metal sensor piece, h indicate the transmission line of electricity height off the ground.
According to specific embodiment provided by the invention, the invention discloses following technique effects：
When solving measurement power line conductive line voltage in the prior art, the existing mutual inductance body using voltage transformer
Product is big, cost is high, measures the problems such as dumb, insulating requirements are high.The measuring device of the application is small, at low cost.It is applying
When, line voltage distribution can be monitored in real time, moreover it is possible to the information monitored is sent to substation, it, can be accurate in line failure
It navigates in a certain span, makes staff from line walking, have emphatically for transmission line of electricity inspection, repair and on-line condition monitoring
Want meaning.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram for the voltage measuring apparatus that the present invention is suitable for transmission line of electricity；
Fig. 2 is the transverse sectional view of grading ring in measuring device of the present invention；
Wherein, 1 is shaft tower, and 2 be wireless transmitter or electrooptic conversion module, and 3 be measuring circuit, and 4 be cable, and 5 be insulation
Son, 6 be grading ring, and 7 be transmission line；8 be sampling resistor, and 9 be metal sensor piece, and 10 be insulating film, and 6-1 is connecting rod, 6-2
For fixed ring.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is the structural schematic diagram for the voltage measuring apparatus that the present invention is suitable for transmission line of electricity.As shown in Figure 1, the survey
Measuring device includes：Measuring circuit 3, cable 4, insulator 5, grading ring 6, sampling resistor (not identified in figure), metal sensor piece (figure
In do not identify), wireless transmitter or electrooptic conversion module 2, voltage display (not identified in figure)；
Transmission line of electricity 7 to be measured is fixed on by the insulator 5 on shaft tower 1, and the shaft tower 1 is support transmission line of electricity 7
Supporter；The transmission line of electricity to be measured 7 is fixed on 5 end of the insulator by the gold utensil of 5 end of the insulator；
The grading ring 6 is the ring type structure with pressure effect, and insulator end is mounted on by fixed ring and connecting rod
Gold utensil on；The grading ring 6 is connect by cable 4 with the input terminal of the measuring circuit 3；
The sampling resistor 8 and metal sensor piece 9 are located inside grading ring 6；The metal sensor piece is to be pressed from described
The thin slice that 6 side surface of ring is cut down, the metal sensor piece is pasted on by stick at corresponding cut surface, and passes through insulation
Film separates the cut surface of the metal sensor piece and the grading ring 6；The metal sensor piece passes through conducting wire and the sampling
First connecting pin of resistance connects, and the inner surface of the grading ring 6 is connect with the second connection end of the sampling resistor, described to adopt
First connecting pin of sample resistance and second connection end are connected in parallel to one end of the cable 4, and the other end of the cable 4 is by grading ring
6 pick out, and inside insulator 5, are connected to the input terminal of the measuring circuit 3 always, since shaft tower 1 and ground etc. are electric
Position, will not be interfered.At this point, measuring circuit 3 measure be sampling resistor both ends voltage.
Transmission line of electricity 7 is calculated and be shown in the voltage value for the sampling resistor that the voltage display is measured according to measuring circuit 3
Voltage measuring value.The position of voltage display can be placed on receiving terminal according to actual demand.
The output end of the measuring circuit 3 is wirelessly connect with the voltage display, can be by wirelessly sending out
Emitter 2 transmits signal, can also transmit signal by electrooptic conversion module (not identified in figure).It is transmitted using wireless transmitter 2
When signal, the output end of measuring circuit is connect with the input terminal of wireless transmitter 2, the radio that wireless transmitter 2 passes through transmitting
The voltage value that measuring circuit measures is transmitted to the voltage display of receiving terminal by wave.When using electrooptic conversion module transmission signal
When, the output end of measuring circuit and the input terminal of electrooptic conversion module connect, and electrooptic conversion module will by OPGW optic cable
The optical signal transmission that is converted into of electric signal for the voltage value that measuring circuit measures to receiving terminal voltage display.
Fig. 2 is the transverse sectional view of grading ring in measuring device of the present invention.As shown in Fig. 2, the grading ring passes through
Connecting rod 6-1 and fixed ring 6-2 are fixed by socket on the gold utensil of insulator end.
Include sampling resistor 8 and metal sensor piece 9 inside grading ring；The metal sensor piece 9 is from grading ring side surface
The thin slice cut down, the metal sensor piece 9 are pasted on by stick at corresponding cut surface, and by insulating film 10 by institute
It states metal sensor piece 9 and the cut surface of grading ring separates；The surface of the metal sensor piece 9 passes through conducting wire and adopting in grading ring
First connecting pin of sample resistance 8 connects, and the inner surface of the grading ring is connect with the second connection end of the sampling resistor, described
First connecting pin of sampling resistor and second connection end are connected in parallel to one end of cable 4, and the other end of the cable 4 is via grading ring
It picks out, by interior insulator, is connected to the input terminal of measuring circuit always.The resistance value model of sampling resistor 8 inside grading ring
It encloses for 0.1M Ω~200M Ω.Insulating film 10 is polytetrafluoroethylene (PTFE) or other insulating materials.
Sampling resistor 8 and metal sensor piece 9 are mounted in grading ring by the present invention, can be against outside electromagnetic interference, together
When metal sensor piece 9 pass through insulator die 10 and the side surface of transmission line of electricity is insulated.
It is corresponding the present invention also provides a kind of voltage measurement method suitable for transmission line of electricity using above-mentioned measuring device,
It specifically includes：
Obtain the voltage value for the sampling resistor that measuring circuit measures；
Determine the proportionality coefficient of sampling resistor voltage value and transmission line of electricity voltage value to be measured；
According to the voltage value of the proportionality coefficient and the sampling resistor, the voltage value U of the transmission line of electricity to be measured is determined,
U=kU0, wherein U0For the voltage value of the sampling resistor, k is the proportionality coefficient, and U is the voltage of the transmission line of electricity to be measured
Value.
Wherein it is determined that sampling resistor voltage value and the proportionality coefficient of transmission line of electricity voltage value to be measured use formulaIt determines,
And then proportionality coefficient and phase difference is calculated according to sampling resistor size in recipient, and sampling is multiplied by with proportionality coefficient
The voltage value of resistance calculates and shows the voltage waveform of transmission line of electricity, i.e.,：
Determination waits for
Survey the voltage value U of transmission line of electricity.
Wherein, R0Indicate that the sampling resistor value of the sampling resistor, f indicate frequency, ε0Indicate the dielectric constant of air, R tables
Show that the radius of the transmission line of electricity to be measured, S indicate that the surface area of the metal sensor piece, h indicate the transmission line of electricity away from ground height
Degree.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (6)
1. a kind of voltage measuring apparatus suitable for transmission line of electricity, which is characterized in that the measuring device includes：Insulator,
Pressure ring, sampling resistor, metal sensor piece, measuring circuit, voltage display；
The transmission line of electricity to be measured is fixed on the end of the insulator by the gold utensil of the insulator end；
The grading ring is fixed on by connecting rod and fixed ring socket on the gold utensil of the insulator end；The grading ring is logical
Cable is crossed to connect with the input terminal of the measuring circuit；Include sampling resistor and metal sensor piece inside the grading ring；It is described
Metal sensor piece is the thin slice cut down from the grading ring side surface, and the metal sensor piece is pasted on correspondence by stick
Cut surface at, and the cut surface of the metal sensor piece and the grading ring is separated by insulating film；The metal sensor
Piece is connect by conducting wire with the first connecting pin of the sampling resistor, and the of the inner surface of the grading ring and the sampling resistor
The connection of two connecting pins, the first connecting pin of the sampling resistor and second connection end are connected in parallel to one end of the cable, the electricity
The other end of cable is connected to the input terminal of the measuring circuit；
The measuring circuit is used to measure the voltage value of the grading ring internal sample resistance；The voltage display, which is located at, to be received
End, the voltage display are used to that the transmission line of electricity to be calculated and be shown according to the voltage value of the grading ring internal sample resistance
Voltage measuring value.
2. measuring device according to claim 1, which is characterized in that the measuring device further includes：Wireless transmitter or
Electrooptic conversion module；
The output end of the measuring circuit is connect with the input terminal of the wireless transmitter, and the wireless transmitter passes through transmitting
The voltage value that the measuring circuit measures is transmitted to the voltage display of receiving terminal by radio wave；
Alternatively, the output end of the measuring circuit is connect with the input terminal of the electrooptic conversion module, the electrooptic conversion module
The optical signal transmission electric signal for the voltage value that the measuring circuit measures being converted by OPGW optic cable is to receiving terminal
Voltage display.
3. measuring device according to claim 1, which is characterized in that the sampling resistor Standard resistance range inside the grading ring
For 0.1M Ω~200M Ω.
4. measuring device according to claim 1, which is characterized in that the insulating film is Teflom Insulation Material.
5. a kind of voltage measurement method suitable for transmission line of electricity, which is characterized in that the measurement method includes：
Obtain the voltage value for the sampling resistor that measuring circuit measures in measuring device；The measuring device includes：Insulator is pressed
Ring, sampling resistor, metal sensor piece, measuring circuit, voltage display；Transmission line of electricity to be measured is fixed on bar by the insulator
On tower, the transmission line of electricity to be measured is fixed on by the gold utensil of the insulator end on the insulator；The grading ring is logical
It crosses connecting rod and fixed ring socket is fixed on the gold utensil of the insulator end；The grading ring passes through cable and the measurement
The input terminal of circuit connects；Include sampling resistor and metal sensor piece inside the grading ring；The metal sensor piece is from institute
The thin slice that grading ring side surface is cut down is stated, the metal sensor piece is pasted on by stick at corresponding cut surface, and logical
Insulating film is crossed to separate the cut surface of the metal sensor piece and the grading ring；The metal sensor piece by conducting wire with it is described
First connecting pin of sampling resistor connects, and the inner surface of the grading ring is connect with the second connection end of the sampling resistor, institute
It states the first connecting pin of sampling resistor and second connection end is connected in parallel to one end of the cable, the other end of the cable is connected to
The input terminal of the measuring circuit；
Determine the proportionality coefficient of sampling resistor voltage value and transmission line of electricity voltage value to be measured；
According to the voltage value of the proportionality coefficient and the sampling resistor, the voltage value U, U=of the transmission line of electricity to be measured are determined
kU0, wherein U0For the voltage value of the sampling resistor, k is the proportionality coefficient, and U is the voltage value of the transmission line of electricity to be measured.
6. measurement method according to claim 5, which is characterized in that the acquisition sampling resistor voltage value and transmission of electricity to be measured
The proportionality coefficient of line voltage value, specifically includes：
According toReally
Determine the proportionality coefficient k of sampling resistor voltage value and transmission line of electricity voltage value to be measured, wherein R0Indicate the sampling of the sampling resistor
Resistance value, f indicate frequency, ε0Indicate that the dielectric constant of air, R indicate that the radius of the transmission line of electricity to be measured, S indicate the gold
Belong to the surface area of vane, h indicates the transmission line of electricity height off the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810563109.4A CN108593997B (en) | 2018-06-04 | 2018-06-04 | Voltage measuring device and method suitable for power transmission line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810563109.4A CN108593997B (en) | 2018-06-04 | 2018-06-04 | Voltage measuring device and method suitable for power transmission line |
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| Publication Number | Publication Date |
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| CN108593997A true CN108593997A (en) | 2018-09-28 |
| CN108593997B CN108593997B (en) | 2019-12-06 |
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ID=63630409
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810563109.4A Expired - Fee Related CN108593997B (en) | 2018-06-04 | 2018-06-04 | Voltage measuring device and method suitable for power transmission line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112034235A (en) * | 2020-09-07 | 2020-12-04 | 广东电网有限责任公司广州供电局 | Device and method suitable for measuring power frequency voltage of T-shaped cable connector |
| CN112946343A (en) * | 2021-01-29 | 2021-06-11 | 华北电力大学 | Overhead line power frequency voltage measuring device and measuring method |
| CN114047386A (en) * | 2021-10-29 | 2022-02-15 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Equalizing ring surface electric field intensity measuring device and equalizing ring system |
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| CN112034235B (en) * | 2020-09-07 | 2023-06-27 | 广东电网有限责任公司广州供电局 | Device and method suitable for power frequency voltage measurement of cable T-shaped connector |
| CN112946343A (en) * | 2021-01-29 | 2021-06-11 | 华北电力大学 | Overhead line power frequency voltage measuring device and measuring method |
| CN114047386A (en) * | 2021-10-29 | 2022-02-15 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Equalizing ring surface electric field intensity measuring device and equalizing ring system |
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| CN108593997B (en) | 2019-12-06 |
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