CN205539165U - Transmission line excessive pressure monitoring devices - Google Patents
Transmission line excessive pressure monitoring devices Download PDFInfo
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- CN205539165U CN205539165U CN201620310029.4U CN201620310029U CN205539165U CN 205539165 U CN205539165 U CN 205539165U CN 201620310029 U CN201620310029 U CN 201620310029U CN 205539165 U CN205539165 U CN 205539165U
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- monitoring device
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Abstract
The embodiment of the utility model discloses transmission line excessive pressure monitoring devices, including electrode, support, passive excessive pressure monitoring devices and signal receiver. Wherein: the electrode passes through support and steel pylons fixed connection, and the electrode is connected with passive excessive pressure monitoring devices electricity, and passive excessive pressure monitoring devices and signal receiver are connected through the electricity. Passive excessive pressure monitoring devices includes low pressure electric capacity and lightning conversion crystal, wherein: ground connection behind low pressure electric capacity and the electrode series connection, lightning conversion crystal and low pressure capacitance parallel connection, lightning conversion crystal and signal receiver electricity are connected. Through the photoelectric effect of lightning conversion crystal among the passive excessive pressure monitoring devices, can with the electrode coupling to transmission line cross voltage signal and turn into low voltage signal, and then reach the original voltage signal of mistake through the low voltage signal inverse that records. Signal transmission process need not mains operated, can effectively guarantee voltage signal's the transmission that lasts.
Description
Technical field
This utility model relates to power cable state detection technique field, particularly relates to a kind of transmission line of electricity overvoltage monitoring dress
Put.
Background technology
Monitoring transmission line of electricity over-voltage condition, for obtaining real transmission line of electricity overvoltage data, analyzes Overvoltage,
Improvement line insulation coordinates, and improves the Lighting Protection Measures of overhead transmission line and ensures that safe operation of power system has important
Meaning.Zenith tracking is generally divided into contact and contactless two kinds.Contact monitoring is in transformer station or on circuit
Install capacitive divider additional, because installing capacitive divider cost height additional and adding operation maintenance workload, as there is insulation event
Barrier is by increase system operation risk.Therefore the contactless monitoring of the many employings of transmission line of electricity over-voltage monitoring.
Existing contactless over-voltage monitoring device is typically fixedly installed on shaft tower, sensor utilize overhead transmission line with
Stray capacitance between sensor sensing plate, as high voltage arm capacitor, connects capacitor as low-voltage arm electric capacity under tablet.
Overvoltage signal is drawn from the sensing matched resistance of metallic plate, is transferred to the data collecting system of outside by coaxial cable.
Existing contactless over-voltage monitoring device needs after getting on-the-spot voltage signal to be passed by active data acquisition
Defeated unit could realize long range propagation.But when power supply is disturbed by extraneous factor in the course of the work, wink can be produced
Time high-voltage pulse, destroy power supply for electrical stability, thus affect the transmission of overvoltage signal.
Utility model content
This utility model provides a kind of transmission line of electricity overvoltage monitoring device, to solve transmission line of electricity overvoltage prison in prior art
Survey device because of power supply stability deficiency, the problem affecting the transmission of overvoltage signal.
In order to solve above-mentioned technical problem, the utility model discloses following technical scheme:
A kind of transmission line of electricity overvoltage monitoring device, including electrode, support, passive overpressure monitoring device and signal receiving device,
Wherein:
Electrode is connected by support and electric power pylon are fixing；Electrode electrically connects with passive overpressure monitoring device；Passive overpressure is supervised
Survey device with signal receiving device by electrically connecting；
Passive overpressure monitoring device includes low-voltage capacitance and electro-optic conversion crystal, wherein: low-voltage capacitance is connected with electrode and is followed by
Ground；Electro-optic conversion crystal is in parallel with low-voltage capacitance；Electro-optic conversion crystal electrically connects with signal receiving device.
Preferably, transmission line of electricity overvoltage monitoring device also includes the first holding wire and secondary signal line, wherein, the first signal
Line connects electrode and passive overpressure monitoring device；Secondary signal line connected with passive overvoltage monitoring device and signal receiving device；
Secondary signal line is optical fiber or OPGW.
Preferably, electrode is parallel with transmission line of electricity drainage thread.
Preferably, electrode is that area is more than 500cm2, thickness is the rectangular metal sheet of 0.2cm.
From above technical scheme, the transmission line of electricity overvoltage monitoring device that this utility model provides, including electrode, support,
First holding wire, secondary signal line, passive overpressure monitoring device and signal receiving device, wherein: electrode by support with
Electric power pylon is fixing to be connected, and electrode is electrically connected by the first holding wire with overvoltage monitoring device, passive overpressure monitoring device and
Signal receiving device is electrically connected by secondary signal line.By passive overpressure monitoring device, can couple the electrodes to is defeated
Electric line overvoltage signal is converted into low voltage signal, and then draws original overvoltage by the low voltage signal inverse recorded
Signal.Signals transmission is powered without power supply, and the continuous transmission of overvoltage signal can be effectively ensured.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will to embodiment or
In description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, for ordinary skill people
For Yuan, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The transmission line of electricity overvoltage monitoring device structural representation that Fig. 1 provides for this utility model embodiment；
The passive overpressure monitoring device structural representation that Fig. 2 provides for this utility model embodiment.
Illustrate:
1-electrode, 2-support, 3-the first holding wire, 4-passive overpressure monitoring device, 5-signal receiving device, 6-second
Holding wire, 41-low-voltage capacitance, 42-electro-optic conversion crystal.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in this utility model, below in conjunction with this practicality
Accompanying drawing in new embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that
Described embodiment is only a part of embodiment of this utility model rather than whole embodiments.New based on this practicality
Embodiment in type, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise
Execute example, all should belong to the scope of this utility model protection.
The transmission line of electricity overvoltage monitoring device structural representation that Fig. 1 provides for this utility model embodiment.As seen from Figure 1,
Transmission line of electricity overvoltage monitoring device includes that electrode 1, support the 2, first holding wire 3, secondary signal line 6, passive overpressure are supervised
Survey device 4 and signal receiving device 5.Wherein, electrode 1 is connected by support 2 and electric power pylon are fixing.Support 2 by
The epoxy resin fiberglass of long-term tolerance 1kV voltage is made, can by the Adjusting Shape electrode 1 of adjusting pole 2 with
The relative position of transmission line of electricity drainage thread.Electrode 1 is electrically connected by the first holding wire 3 with overvoltage monitoring device 4.First
Holding wire 3 is shielded signal line, can avoid the interference signal entering signal line internal layer produced in transmission line of electricity running
Conductor, reduces the loss of transmission signal simultaneously, plays jamproof effect.Passive overpressure monitoring device 4 receives with signal
Device 5 is electrically connected by secondary signal line 6.Signal receiving device 5 receives device or fiber optical transceiver for Laser emission,
For receiving the optical signal of passive overpressure monitoring device 4 transmission.The present embodiment use Laser emission receive device, laser
The optical signal that reception device receives is received by light-sensitive device, after light-sensitive device receives illumination, can produce phase with light intensity difference
Answering the photogenerated current of intensity, electric current amplifies the output signal of telecommunication through amplifier.The pulse signal produced because of the change of electric current
Directly input in single-chip microcomputer, and then overvoltage signal is judged by single-chip microcomputer.Signal receiving device 5 is positioned at transformer station,
Passive overpressure monitoring device 4 is positioned at high voltage bus or outer shaft tower of standing.
The passive overpressure monitoring device structural representation that Fig. 2 provides for this utility model embodiment.From Figure 2 it can be seen that it is passive
Overvoltage monitoring device 4 includes low-voltage capacitance 41 and electro-optic conversion crystal 42.Wherein: low-voltage capacitance 41 is connected with electrode 1
Rear ground connection, electro-optic conversion crystal 42 is in parallel with low-voltage capacitance 41, and electro-optic conversion crystal 42 electrically connects with secondary signal line 6.
The capacitance of low-voltage capacitance 41 determines according to stray capacitance C1 between drainage thread and metal rectangular electrode, can be 0.01
μ F, 0.02 μ F, 0.03 μ F etc..Electro-optic conversion crystal 42 chooses lithium columbate crystal.Lithium columbate crystal is in low pressure telecommunications
Number effect under, refractive index can occur linear change along with the change of electric field strength, through the light of lithium columbate crystal
Can produce birefringent phenomenon, the phase contrast between birefringence two light wave is directly proportional to electric field strength.Pass through lithium niobate crystal
Body can detect that overvoltage change causes the phase place of light to change, and then inverse out executes electric field or voltage, transformation process without
Power supply is needed to power.
In the present embodiment, transmission line of electricity overvoltage monitoring device operation principle can be summarized as: electrode 1 and transmission line of electricity drain
Line near time, electrode 1 produces stray capacitance C1.Stray capacitance C1 and the low-voltage capacitance in passive overpressure monitoring device 4
Ground connection after 41 series connection, constitutes partial pressure unit, it is achieved the noncontact sensing of voltage.Sensed by the noncontact of voltage, electrode
1 senses transmission line of electricity drainage thread overvoltage signal, and overvoltage signal is converted to low tension signal, then through the first letter
Number line 3 transmits to passive overpressure monitoring device 4.Passive overpressure monitoring device 4 receives the low pressure overvoltage of electrode 1 transmission
Signal, low pressure overvoltage signal is converted to optical signal by electro-optic conversion crystal 42, transmits to signal via secondary signal line 6
Receive device 5.
In the present embodiment, electrode 1 is parallel with transmission line of electricity drainage thread, for area more than 500cm2, thickness is 0.2cm's
Rectangular metal sheet.When the sheet metal conductor parallel with transmission line of electricity drainage thread and drainage thread very close to, especially work as metal
When sheet conductor and drainage thread keeping parallelism, the stray capacitance of generation is maximum, thus reaches preferable voltage noncontact sensing effect
Really.Secondary signal line 6 is optical fiber or OPGW, it is simple to the Lossless transport of optical signal.
The transmission line of electricity overvoltage monitoring device that this utility model embodiment provides passes through electric light in overvoltage signals transmission
The photoelectric effect of conversion crystal 42, is converted to optical signal by the overvoltage signal of telecommunication.Laser emission receives device and will receive
Optical signal is converted to the signal of telecommunication, monitors overvoltage signal in real time.During optical signal transmission little by electromagnetic interference, and nothing
Source overvoltage monitoring device 4 does not contacts with power system primary equipment, measures safe and reliable.Transmission line of electricity overvoltage monitoring device
Powering without power supply, signal transmission is little by periphery electromagnetic interference, and the continuous transmission of overvoltage signal can be effectively ensured.
It should be noted that in this article, such as the relational terms of " first " and " second " or the like be used merely to by
One entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or behaviour
Relation or the order of any this reality is there is between work.And, term " includes ", " comprising " or it is any
Other variants are intended to comprising of nonexcludability so that include the process of a series of key element, method, article or
Equipment not only includes those key elements, but also includes other key elements being not expressly set out, or also includes for this mistake
The key element that journey, method, article or equipment are intrinsic.In the case of there is no more restriction, statement " include one
It is individual ... " key element that limits, it is not excluded that there is also additionally in including the process of key element, method, article or equipment
Identical element.
Below it is only detailed description of the invention of the present utility model, makes to skilled artisans appreciate that or realize this practicality new
Type.Multiple amendment to these embodiments will be apparent to one skilled in the art, defined herein
General Principle can realize in other embodiments in the case of without departing from spirit or scope of the present utility model.Cause
This, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to former with disclosed herein
The widest scope that reason is consistent with features of novelty.
Below it is only detailed description of the invention of the present utility model, it is noted that for those skilled in the art
For, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and profit
Decorations also should be regarded as protection domain of the present utility model.
Claims (4)
1. a transmission line of electricity overvoltage monitoring device, it is characterised in that include electrode (1), support (2), passive overpressure
Monitoring device (4) and signal receiving device (5), wherein:
Described electrode (1) is connected by described support (2) and electric power pylon are fixing；Described electrode (1) is passive with described
Overvoltage monitoring device (4) electrically connects；Described passive overpressure monitoring device (4) is passed through with described signal receiving device (5)
Electrical connection；
Described passive overpressure monitoring device (4) includes low-voltage capacitance (41) and electro-optic conversion crystal (42), wherein: institute
State ground connection after low-voltage capacitance (41) is connected with described electrode (1)；Described electro-optic conversion crystal (42) and described low tension
Hold (41) parallel connection；Described electro-optic conversion crystal (42) electrically connects with described signal receiving device (5).
Transmission line of electricity overvoltage monitoring device the most according to claim 1, it is characterised in that described transmission line of electricity overvoltage
Monitoring device also includes the first holding wire (3) and secondary signal line (6), and wherein, described first holding wire (3) connects
Described electrode (1) and described passive overpressure monitoring device (4)；Described secondary signal line (6) connects described passive overpressure
Monitoring device (4) and described signal receiving device (5)；Described secondary signal line (6) is optical fiber or optical fiber composite overhead
Ground wire.
Transmission line of electricity overvoltage monitoring device the most according to claim 1, it is characterised in that described electrode (1) with
Transmission line of electricity drainage thread is parallel.
Transmission line of electricity overvoltage monitoring device the most according to claim 1, it is characterised in that described electrode (1) is
Area is more than 500cm2, thickness is the rectangular metal sheet of 0.2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620310029.4U CN205539165U (en) | 2016-04-14 | 2016-04-14 | Transmission line excessive pressure monitoring devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620310029.4U CN205539165U (en) | 2016-04-14 | 2016-04-14 | Transmission line excessive pressure monitoring devices |
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| Publication Number | Publication Date |
|---|---|
| CN205539165U true CN205539165U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201620310029.4U Active CN205539165U (en) | 2016-04-14 | 2016-04-14 | Transmission line excessive pressure monitoring devices |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387772A (en) * | 2018-03-08 | 2018-08-10 | 清华大学 | A kind of measurement method of transmission line of electricity overvoltage |
| CN109387745A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of power distribution network over-voltage sensing device |
| CN111830315A (en) * | 2020-07-22 | 2020-10-27 | 云南电网有限责任公司电力科学研究院 | Non-contact transient overvoltage sensor with compact voltage division structure |
-
2016
- 2016-04-14 CN CN201620310029.4U patent/CN205539165U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387772A (en) * | 2018-03-08 | 2018-08-10 | 清华大学 | A kind of measurement method of transmission line of electricity overvoltage |
| CN108387772B (en) * | 2018-03-08 | 2020-02-18 | 清华大学 | Method for measuring overvoltage of power transmission line |
| CN109387745A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of power distribution network over-voltage sensing device |
| CN111830315A (en) * | 2020-07-22 | 2020-10-27 | 云南电网有限责任公司电力科学研究院 | Non-contact transient overvoltage sensor with compact voltage division structure |
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