CN208188193U - A kind of voltage measuring apparatus for distribution line - Google Patents
A kind of voltage measuring apparatus for distribution line Download PDFInfo
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- CN208188193U CN208188193U CN201820853868.XU CN201820853868U CN208188193U CN 208188193 U CN208188193 U CN 208188193U CN 201820853868 U CN201820853868 U CN 201820853868U CN 208188193 U CN208188193 U CN 208188193U
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- distribution line
- lower case
- upper housing
- measuring apparatus
- voltage measuring
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Abstract
The utility model provides a kind of voltage measuring apparatus for distribution line, it is related to distribution line monitoring technical field, the voltage measuring apparatus includes upper housing and lower case, upper housing and lower case are hinged in the side of width direction, the other side is provided with locking device, is provided with the groove for placing distribution line to be measured between upper housing and lower case along its length；Fluting is provided in the middle part of lower case, fluting inside is provided with the metal fixture for contact measured distribution line, the pushing meanss for pushing metal fixture mobile are provided in fluting；The surface of upper housing and lower case is provided with metal shell；Isolation capacitance and measurement capacitor are in series between metal fixture and metal shell, the both ends for measuring capacitor are connected with measuring circuit.The utility model can be directly installed on distribution line and be monitored, and without installing primary equipment in route, also do not need the installation that has a power failure, be suitble in power grid large scale deployment.
Description
Technical field
The utility model relates to distribution line monitoring technical fields, particularly relate to a kind of voltage measurement for distribution line
Device.
Background technique
Power distribution network is the network that power transmission distribution is carried out to city and rural power user, mainly by step-down substation,
The equipment such as distribution line, distribution transformer composition.What the distribution line in China was mainly taken is small current neutral grounding system, and route is
The voltage class of three-phase three-wire system, route is generally 10KV, the system that also there is 20KV in individual places.Every distribution line length is not
Together, line alignment is complicated, often there is an a plurality of branched line, and there are also branched lines below branched line.In order to grasp power distribution network
Operation conditions improves the business efficiency of route operation, improves the security reliability of route operation, and O&M department of Utilities Electric Co. needs
The operating condition of route is grasped as far as possible.
Existing power system monitor scheme is broadly divided into two classes: first is that installing measuring device in substation, monitoring every is matched
The Current Voltage parameter of electric line head end simultaneously records waveform；Second is that panel switches are installed on the line, inside panel switches
Or the electric current and voltage transformer of external harmoniousness, carry out operation monitoring.
Both monitoring scheme technical solutions are complicated, need to install primary equipment in power distribution network, are typically necessary power failure peace
Dress.Power distribution network can not install excessive primary equipment, because these equipment itself are also to have service life, excessive is primary
Equipment increases the maintenance workload of user, and new hidden danger is also brought to power distribution network.In addition, can in order to improve operation of power networks
By property, Utilities Electric Co.'s all strict regulations the scheduled outage time of every route, this valuable power off time are all used to hold substantially
Planned maintenance task of the row to distribution line, it is impossible to installation monitoring device many times.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of voltage measuring apparatus for distribution line, are not required to
Primary equipment to be installed in route, also not need the installation that has a power failure, be suitble in power grid large scale deployment.
In order to solve the above technical problems, the embodiments of the present invention provide a kind of voltage measurement dress for distribution line
It sets, including shell, the shell includes upper housing and lower case, in which:
The upper housing and lower case are rectangle, and the upper housing and lower case are hinged in the side of width direction,
The other side is provided with locking device, is provided with along its length between the upper housing and lower case for placing distribution wire to be measured
The groove on road；
It is provided with fluting in the middle part of the lower case, the gold for contact measured distribution line is provided on the inside of the fluting
Belong to fixture, the pushing meanss for pushing the metal fixture mobile are provided in the fluting；
The surface of the upper housing and lower case is provided with metal shell, the metal shell of the upper housing and it is described under
The metal shell of shell is connected；
Isolation capacitance and measurement capacitor are in series between the metal fixture and the metal shell, the measurement capacitor
Both ends are connected with measuring circuit.
Further, the calculation formula of the voltage U0 of the distribution line to be measured are as follows:
U0=k0*U2
Wherein, k0 is voltage coefficient, is obtained by normal voltage source calibration；U2 is the voltage at the measurement capacitor both ends.
Further, the locking device is the first screw penetrated from the lower case lower part.
Further, the pushing meanss include the L bracket being arranged in the fluting, are worn in the L bracket
There is the second screw, the end of second screw is resisted against on the metal fixture.
Further, first screw and the second screw are screw of the head end with circular hole.
Further, the metal shell is arc-shaped.
Further, the length of the upper housing and lower case is 200-240mm, width 120-160mm.
Further, the measuring circuit include sequentially connected filter circuit, amplifying circuit, analog to digital conversion circuit and in
Central Processing Unit is also connected with wireless communication module in the central processing unit.
Further, the upper surface middle part of the upper housing is convexly equipped with handle.
Further, the material of the upper housing, lower case and handle is nylon+glass fibre reinforced composion,
The material of the metal shell and metal fixture is aluminium.
The above-mentioned technical proposal of the utility model has the beneficial effect that:
In above scheme, in application, rotarily opening upper housing and lower case, distribution line to be measured is placed in groove,
Then it is closed upper housing and lower case, and is fixed upper housing and lower case by locking device, finally by pushing meanss
It pushes metal fixture to move up and is pressed against distribution line to be measured, be stuck in whole device reliably on distribution line.Entire behaviour
The process of work can be operated by insulation facility, to realize electrification installation.The utility model can be directly installed on distribution wire
Road is monitored, and without installing primary equipment in route, is not also needed the installation that has a power failure, is suitble in power grid large scale deployment.
Detailed description of the invention
Fig. 1 is the installation diagram of the voltage measuring apparatus for distribution line of the utility model, and wherein Fig. 1 (a) is
Facad structure figure, Fig. 1 (b) are construction profile, and Fig. 1 (c) is face upwarding assumption diagram, and Fig. 1 (d) is sectional structure chart；
Fig. 2 is the installation process figure of voltage measuring apparatus shown in Fig. 1；
Fig. 3 is the circuit diagram of voltage measuring apparatus shown in Fig. 1；
Fig. 4 incudes schematic diagram to the potential of shell for distribution line to be measured in voltage measuring apparatus shown in Fig. 1；
Fig. 5 is the structure chart of measuring circuit in voltage measuring apparatus shown in Fig. 1.
Specific embodiment
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.
The utility model installs primary equipment for needing to have a power failure in power distribution network when in the prior art monitoring distribution line
And primary equipment is not suitable for the excessive problem of installation, provides a kind of voltage measuring apparatus for distribution line.
As shown in Figs. 1-5, the voltage measuring apparatus provided by the embodiment of the utility model for distribution line, including shell
1, shell 1 includes upper housing 11 and lower case 12, in which:
Upper housing 11 and lower case 12 are rectangle, and upper housing 11 and lower case 12 are hinged in the side of width direction
(specifically can be hinged by one or two pin shaft, two pin shafts 13 are used in Fig. 1 (c)), to make upper housing 11 and lower casing
The other side of the rotatable unlatching of body 12 and closure, upper housing 11 and lower case 12 is provided with locking device 14, and upper housing 11 is under
The groove 16 for placing distribution line 15 to be measured is provided between shell 12 along its length；
The middle part of lower case 12 is provided with fluting 17, and 17 inside of fluting is provided with the gold for contact measured distribution line 15
Belong to fixture 18, the pushing meanss 19 for pushing metal fixture 18 mobile are provided in fluting 17；
The surface of upper housing 11 and lower case 12 is provided with metal shell (not shown), the metal shell of upper housing 11 and
The metal shell of lower case 12 is connected；
Isolation capacitance C1 and measurement capacitor C2 are in series between metal fixture 18 and the metal shell, measurement capacitor C2's
Both ends are connected with measuring circuit.
The voltage measuring apparatus of the present embodiment is open-type structure, will be in application, rotarily open upper housing and lower case
It is measured electric line and is placed in groove (as shown in Figure 2), be then closed upper housing and lower case, and pass through locking device for upper casing
Body and lower case are fixed, and are pushed metal fixture to move up finally by pushing meanss and are pressed against distribution line (such as Fig. 1 to be measured
(d) shown in), it is stuck in whole device reliably on distribution line to be measured.Whole operation process can be by insulation facility (as absolutely
Edge stick etc.) it operates, to realize electrification installation.
The present embodiment can be directly installed on distribution line and be monitored, without installing primary equipment in route, also not
Need to have a power failure installation, is suitble in power grid large scale deployment.
As shown in figure 3, the utility model technology realizes the measurement of distribution line voltage-to-ground using the principle of capacitance partial pressure.
As shown in figure 4, distribution line be powered after, around will form electric field, it is one that the metal polar plate in electric field, which can be charged,
Electrode, the voltage between two pole plates is measurable.
As shown in Figures 3 and 5, the metal fixture 18 contacted in voltage measuring apparatus with distribution line to be measured is measuring device
One electrode, the metal shell on upper housing 11 and lower case 12 are another electrodes of measuring device.Between two electrodes
It is connected by two capacitors C1 and C2, the voltage of capacitor C1, C2 are exactly the voltage between two electrodes.Metal shell and electricity
It presses between zero reference point and exists in distribution capacity C3, voltage zero reference point is typically chosen in the earth.Distribution line to be measured is to reference
The voltage of point is equal to equivalent capacity C4 between capacitor C1, C2, C3 and high-voltage conducting wires (distribution line i.e. to be measured) and metal fixture 18
On the sum of voltage, when distribution line to be measured is bare conductor, distribution line is directly equal to capacitor to the capacitor between reference point
The sum of voltage of C1, C2 and C3.Wherein the value range of C1 and C2 can be 470 μ F-1000 μ F.In Fig. 3, E0 is distribution to be measured
The electric field that line-to-ground is formed, E1 form on upper housing metal shell and lower case metal shell equal for distribution line to be measured
Even electric field.
Distribution line to be measured is to there are linear relationships between the voltage U2 on the voltage U0 and capacitor C2 of reference point, it may be assumed that
U0=k0*U2
Wherein, k0 is voltage coefficient, and value range can pass through normal voltage source calibration between 500~1000
It obtains；U2 is the voltage for measuring the both ends capacitor C2, can directly measure U2 by the measuring circuit inside measuring device.
This way it is possible to realize measurement of the distribution line to be measured to reference point voltage, and this mode does not need to have a power failure
Measuring device is installed.
Distribution circuit electric voltage is up to several kilovolts to tens of thousands of volts, and measuring circuit is easy by strong electromagnetic, above-mentioned reality
Example is applied in such a way that isolation capacitance C1 is set, solves high-voltage electromagnetic interference problem.Measuring circuit is (i.e. to be measured with high-pressure conductor
Distribution line) between be not directly contacted with, isolation mech isolation test is formd by metal fixture 18 and capacitor C1, which guarantee measurement tie
The stability of fruit, the reliability of device.
As shown in Fig. 1 (d), after upper housing 11 and rotating closed lower case 12, for convenience of the fixation for realizing the two, locking
Device 14 can be the first screw penetrated from 12 lower part of lower case, be convenient for passing through insulating tool behaviour below whole device in this way
It installs.The metal shell of upper housing 11 is connected with the metal shell of lower case 12, both can be in device to realize the connection
Inside is connected by conducting wire, and the connection of two metal shells can also be realized by the first screw herein.
As shown in Fig. 1 (a)-(d), pushing meanss 19 may include the L bracket 191 being arranged in fluting 17, L bracket
The second screw 192 is equipped on 191, the end of the second screw 192 is resisted against on metal fixture 18.In this way, passing through fluting and L shape
The design of bracket can make metal card move up and down distance with enough, and also facilitate the setting of the second screw.
Preferably, above-mentioned first screw and the second screw are screw of the head end with circular hole, in order to use during installation
Insulating bar carrys out rotation process, realizes electrification installation.For increase intensity, the second screw can also using overstriking design, and for into
One step facilitates operation, as shown in Fig. 1 (a), can also be equipped with located lateral bar 1921 thereon.
The shell shape of whole device is closer to round better, conducive to equipotentiality body is formed, therefore upper housing 11 and lower case 12
On metal shell it is preferably arc-shaped.And metal shell area is the bigger the better, it is contemplated that product practicability, therefore to upper
The size design of shell 11 and lower case 12 are as follows: long 200-240mm, wide 120-160mm.Pole plate (the i.e. metal of large area in this way
Watchcase) ensure the uniform and stable property that internal electric field is distributed, it is therefore prevented that the distortion of marginal electrical power line.Meanwhile large area pole plate
Mode, it can be ensured that the energy on pole plate is sufficient, will not be influenced easily by surrounding enviroment, it is ensured that measurement result is stablized.
In above embodiments, as shown in figure 5, measuring circuit may include sequentially connected filter circuit 31, amplifying circuit
32, analog to digital conversion circuit 33 and central processing unit 34 are also connected with wireless communication module 35 in central processing unit 34, with
External monitoring system for power distribution networks 40 communicates.Wireless communication module 35 can use the wireless communication techniques such as WiFi, bluetooth, 4G, 5G.
It should be understood that measuring circuit can not also influence this reality using well known to a person skilled in the art other circuit forms
With the implementation of new technique scheme.
In above embodiments, the upper surface middle part of upper housing 11 can be convexly equipped with handle 20, in order to install operation.And
And the material of upper housing 11, lower case 12 and handle 20 can be nylon+glass fibre reinforced composion, metal shell
Material with metal fixture 18 can be aluminium, and the material of the first screw and the second screw can be stainless steel.
To sum up, the distribution circuit electric voltage measuring device manufactured and designed according to the utility model, the distribution suitable for 0~35KV
The voltage measurement of net overhead transmission line, measurable wire type include bare conductor and insulated conductor.Applicable temperature range is from -40 DEG C
~70 DEG C, measure voltage accuracy ± 2%.And through testting, no matter the voltage measuring apparatus of the utility model is in accuracy of measurement
It is substantially improved compared to the prior art with precision aspect.
As shown in table 1 below, wherein the voltage measuring apparatus of the utility model corresponds to accurate recording type fault detector, existing
The corresponding traditional transient state recording type fault detector of the product of technology, although traditional product can detecte voltage, but do not quantify
Precision (for details, reference can be made to the technical specifications in industry).
Table 1:
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise of not departing from principle described in the utility model, several improvements and modifications can also be made, these improvement
It also should be regarded as the protection scope of the utility model with retouching.
Claims (10)
1. a kind of voltage measuring apparatus for distribution line, including shell, which is characterized in that the shell include upper housing and
Lower case, in which:
The upper housing and lower case are rectangle, and the upper housing and lower case are hinged in the side of width direction, another
Side is provided with locking device, is provided with along its length between the upper housing and lower case for placing distribution line to be measured
Groove；
It is provided with fluting in the middle part of the lower case, the metal card for contact measured distribution line is provided on the inside of the fluting
Have, the pushing meanss for pushing the metal fixture mobile are provided in the fluting；
The surface of the upper housing and lower case is provided with metal shell, the metal shell of the upper housing and the lower case
Metal shell be connected；
Isolation capacitance and measurement capacitor, the both ends of the measurement capacitor are in series between the metal fixture and the metal shell
It is connected with measuring circuit.
2. the voltage measuring apparatus according to claim 1 for distribution line, which is characterized in that the distribution wire to be measured
The calculation formula of the voltage U0 on road are as follows:
U0=k0*U2
Wherein, k0 is voltage coefficient, is obtained by normal voltage source calibration；U2 is the voltage at the measurement capacitor both ends.
3. the voltage measuring apparatus according to claim 1 for distribution line, which is characterized in that the locking device is
The first screw penetrated from the lower case lower part.
4. the voltage measuring apparatus according to claim 3 for distribution line, which is characterized in that the pushing meanss packet
The L bracket being arranged in the fluting is included, the second screw is equipped in the L bracket, the end of second screw is supported
It leans against on the metal fixture.
5. the voltage measuring apparatus according to claim 4 for distribution line, which is characterized in that first screw and
Second screw is screw of the head end with circular hole.
6. the voltage measuring apparatus according to claim 1 for distribution line, which is characterized in that the metal shell is
It is arc-shaped.
7. the voltage measuring apparatus according to claim 1 for distribution line, which is characterized in that the upper housing is under
The length of shell is 200-240mm, width 120-160mm.
8. any voltage measuring apparatus for distribution line in -7 according to claim 1, which is characterized in that the survey
Measuring circuit includes sequentially connected filter circuit, amplifying circuit, analog to digital conversion circuit and central processing unit, the central processing
Wireless communication module is also connected on unit.
9. the voltage measuring apparatus according to claim 8 for distribution line, which is characterized in that the upper housing it is upper
Surface middle part is convexly equipped with handle.
10. the voltage measuring apparatus according to claim 9 for distribution line, which is characterized in that the upper housing, under
The material of shell and handle is nylon+glass fibre reinforced composion, and the material of the metal shell and metal fixture is equal
For aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820853868.XU CN208188193U (en) | 2018-06-04 | 2018-06-04 | A kind of voltage measuring apparatus for distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820853868.XU CN208188193U (en) | 2018-06-04 | 2018-06-04 | A kind of voltage measuring apparatus for distribution line |
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| Publication Number | Publication Date |
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| CN208188193U true CN208188193U (en) | 2018-12-04 |
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ID=64428001
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820853868.XU Active CN208188193U (en) | 2018-06-04 | 2018-06-04 | A kind of voltage measuring apparatus for distribution line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732410A (en) * | 2018-06-04 | 2018-11-02 | 清大智能（北京）科技有限公司 | A kind of voltage measuring apparatus for distribution line |
-
2018
- 2018-06-04 CN CN201820853868.XU patent/CN208188193U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732410A (en) * | 2018-06-04 | 2018-11-02 | 清大智能（北京）科技有限公司 | A kind of voltage measuring apparatus for distribution line |
| CN108732410B (en) * | 2018-06-04 | 2024-02-20 | 清大智能（北京）科技有限公司 | Voltage measuring device for distribution line |
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