CN109782080A - A kind of cable insulation space charge signal wireless transmission system - Google Patents
A kind of cable insulation space charge signal wireless transmission system Download PDFInfo
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- CN109782080A CN109782080A CN201910015575.3A CN201910015575A CN109782080A CN 109782080 A CN109782080 A CN 109782080A CN 201910015575 A CN201910015575 A CN 201910015575A CN 109782080 A CN109782080 A CN 109782080A
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- space charge
- cable
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- measurement device
- charge signal
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Abstract
The present invention relates to a kind of cable insulation space charge signal wireless transmission systems, including space charge sensor, amplifier, bluetooth module, space charge measurement device and high-voltage pulse power source, space charge sensor, amplifier and bluetooth module are packed in cable stress cone by fixing rack for sensor, high-voltage pulse power source, which is connected on cable stress cone, applies high-voltage pulse to it, space charge sensor, amplifier and bluetooth module are sequentially connected, and the bluetooth module and the space charge measurement device that ground is arranged in are wirelessly connected and transmit insulating space charge signal.Space charge sensor is mounted on cable stress cone by the present invention, it is in close contact it with cable accessory stress cone and Bluetooth wireless communication mode is used to transmit space charge signal to space charge measurement device, while guaranteeing the sensitivity of space charge signal testing, also the simplicity of carrying and installation is taken into account, effectively can carry out space charge test by the cable accessory to distribution cable.
Description
Technical field
The invention belongs to high voltage and insulation technology field, especially a kind of cable insulation space charge signal wireless transmission
System.
Background technique
With Chinese society rapid development of economy, economic life various aspects are increasing to electrical energy demands, power equipment
Failure is also more and more, and electrical equipment fault is all caused by Insulation Problems mostly.The cable fault step-by-step run in scene
It sets and is divided into cable major insulation failure and cable accessory failure.According to State Grid Corporation of China to distribution network cable fault statistics, including centre
The cable accessory failure of connector and terminal accounts for about the 90% of total failare number.Cable accessory is the main portion for restricting cable reliability service
Part.For cable accessory failure cause, the previous fault for being only empirically inferred as stress cone installation process at the scene is introduced
Defect；But the experimental results showed that stress cone installation is correct and the good accessible cable accessory of interface still punctures.This
Illustrate that cable insulation breakdown fault has profound essential reason at stress cone.
In cable operation scene, cable accessory is in meeting accumulation space charge under conditions of longtime running, due to space
The distortion of the built up electric field of charge acts on, and the distribution and movement of space charge are to the conductance property of insulating materials, aging, breakdown etc.
There is strong influence.Under the action of extra electric field, especially Severe distortion dielectric is understood in DC electric field, the accumulation of space charge
In original field distribution, certain electromechanical energy is stored, and cause the excitation of charge and compound, so as to cause dielectric substance
Microcosmic destruction, and lead to dielectric final breakdown.Therefore, the distribution and transfer of space charge can change inside dielectric
The distribution of original electric field plays reinforcement or weakening effect to the internal field of material internal, to influence dielectric substance
Electrical characteristic.
Therefore, the distribution and accumulation of on-site test cable accessory Space-charge prevent cable for predicting cable life
Puncture important in inhibiting.There is space charge non-destructive measuring method, pressure wave development method (PWP), laser or so eighties
Intensity modulation method (LIMM) and pulse electroacoustic method (PEA) etc..In current scientific research, most common method is electroacoustic pulse
Method, pulse electroacoustic method (PEA) have been used to the spatial distribution of actual cable sample in laboratory, still, existing space electricity
Load testing device is a cuboid metal shell, by space charge test sensor and amplifier be placed in metal shell with
The interference that the extraneous electromagnetic signal of shielding tests space charge, volume and weight is all excessive, and it is inconvenient with installation to carry, therefore not
It can apply to cable operation scene.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, propose that a kind of design is reasonable, compact-sized and is convenient for taking
The cable insulation space charge signal wireless transmission system of band and installation.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of cable insulation space charge signal wireless transmission system, including space charge sensor, amplifier, bluetooth mould
Block, space charge measurement device and high-voltage pulse power source, the space charge sensor, amplifier and bluetooth module pass through sensing
Device fixed frame is packed in cable stress cone, and the high-voltage pulse power source, which is connected on cable stress cone, applies high-voltage pulse to it,
The space charge sensor, amplifier and bluetooth module are sequentially connected, the bluetooth module and the space charge that ground is arranged in
Measuring device is wirelessly connected and transmits insulating space charge signal.
The space charge sensor includes the PPMA cylinder being set in together from the inside to the outside, internal layer aluminium ring, outer layer aluminium ring,
It is filled with polytetrafluoroethylene material between internal layer aluminium ring and outer layer aluminium ring, SMA cylinder is installed in internal layer aluminium ring bottom and is worn
Cross outer layer aluminium ring.
The fixing rack for sensor is circular ring shape plastic fix clamp tool, which is the buckle knot of adjustable-tightness
Structure.
The space charge measurement device is the PEA space charge measurement device with function of Bluetooth communication.
The advantages and positive effects of the present invention are:
1, space charge sensor is mounted on cable stress cone by the present invention, connects it closely with cable accessory stress cone
It touches and Bluetooth wireless communication mode is used to transmit space charge signal to space charge measurement device, guaranteeing space charge
While the sensitivity of signal testing, the simplicity of carrying and installation is also taken into account, it can be effectively attached to the cable of distribution cable
Part carries out space charge test.
2, the present invention has abandoned the shielding shell mechanism of sensor, greatly reduces the volume of test macro and improves nothing
The anti-interference ability of line signal makes it easy to carry and install, convenient for electric to the space at cable accessory at cable operation scene
Lotus measures, and improves the practicability of system.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of space charge sensor.
Specific embodiment
The embodiment of the present invention is further described below in conjunction with attached drawing.
A kind of cable insulation space charge signal wireless transmission system, as shown in Figure 1, including space charge sensor 3, putting
Big device, bluetooth module, space charge measurement device and high-voltage pulse power source, the space charge sensor, amplifier and bluetooth
Module is packed in the quality for guaranteeing signal measurement on cable stress cone 1 by fixing rack for sensor 2, which adopts
Have with circular ring shape plastic fix clamp, which uses the click-on design of adjustable-tightness, convenient for carrying out while installation
It adjusts.The high-voltage pulse power source, which is connected on cable stress cone, applies high-voltage pulse to it, to generate space charge waveform
Signal.It, will by bluetooth module after the space charge sensor acquisition cable insulation space charge signal after amplifier amplifies
Amplified insulating space charge signal sends space charge measurement device to, which has Bluetooth communication
The PEA space charge measurement device of function, the PEA space charge measurement device is for receiving and display space charge waveform letter
Number, setting carries out waveform observation on ground convenient for tester.
As shown in Fig. 2, the space charge sensor includes PPMA cylinder 7, the unlined aluminium being set in together from the inside to the outside
Ring 6, outer layer aluminium ring 4 are filled with polytetrafluoroethylene material 5 between internal layer aluminium ring and outer layer aluminium ring, pacify in internal layer aluminium ring bottom
Equipped with SMA cylinder 8 and pass through outer layer aluminium ring.
The application method of this space charge signal wireless transmission system are as follows:
1, space charge sensor, high-voltage pulse power source, amplifier and bluetooth module are fixedly mounted on cable stress cone
On outside；
2, bluetooth radio module and PEA space charge measurement device are established into connection, meets signal requirements of real time；
3, it powers to PEA space charge measurement device, high voltage pulse, space charge sensing is applied by high-voltage pulse power source
Device obtains space charge signal；Using Bluetooth transmission wireless signal, it is transmitted to PEA space charge measurement device on ground and receives letter
Number and be observed.
The present invention does not address place and is suitable for the prior art.
It is emphasized that embodiment of the present invention be it is illustrative, without being restrictive, therefore packet of the present invention
Include and be not limited to embodiment described in specific embodiment, it is all by those skilled in the art according to the technique and scheme of the present invention
The other embodiments obtained, also belong to the scope of protection of the invention.
Claims (4)
1. a kind of cable insulation space charge signal wireless transmission system, it is characterised in that: including space charge sensor, amplification
Device, bluetooth module, space charge measurement device and high-voltage pulse power source, the space charge sensor, amplifier and bluetooth mould
Block is packed in cable stress cone by fixing rack for sensor, and the high-voltage pulse power source, which is connected on cable stress cone, applies it
High-voltage pulse, the space charge sensor, amplifier and bluetooth module are sequentially connected, and the bluetooth module and ground are arranged in
Space charge measurement device is wirelessly connected and transmits insulating space charge signal.
2. a kind of cable insulation space charge signal wireless transmission system according to claim 1, it is characterised in that: described
Space charge sensor includes the PPMA cylinder being set in together from the inside to the outside, internal layer aluminium ring, outer layer aluminium ring, in internal layer aluminium ring and
It is filled with polytetrafluoroethylene material between outer layer aluminium ring, SMA cylinder is installed in internal layer aluminium ring bottom and passes through outer layer aluminium ring.
3. a kind of cable insulation space charge signal wireless transmission system according to claim 1 or 2, it is characterised in that:
The fixing rack for sensor is circular ring shape plastic fix clamp tool, which is the buckle structure of adjustable-tightness.
4. a kind of cable insulation space charge signal wireless transmission system according to claim 1 or 2, it is characterised in that:
The space charge measurement device is the PEA space charge measurement device with function of Bluetooth communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015575.3A CN109782080B (en) | 2019-01-08 | 2019-01-08 | Cable insulation space charge signal wireless transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015575.3A CN109782080B (en) | 2019-01-08 | 2019-01-08 | Cable insulation space charge signal wireless transmission system |
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| Publication Number | Publication Date |
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| CN109782080A true CN109782080A (en) | 2019-05-21 |
| CN109782080B CN109782080B (en) | 2021-03-19 |
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| CN201910015575.3A Active CN109782080B (en) | 2019-01-08 | 2019-01-08 | Cable insulation space charge signal wireless transmission system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765958A (en) * | 2020-05-26 | 2020-10-13 | 山东大学 | Vibration type identification method and system based on distributed optical fiber vibration radial distance measurement |
| CN112748293A (en) * | 2020-12-22 | 2021-05-04 | 国网湖北省电力有限公司电力科学研究院 | Measuring system for internal space charge distribution of high-voltage direct-current sleeve in operating state |
| CN115856456A (en) * | 2023-02-27 | 2023-03-28 | 国网山东省电力公司广饶县供电公司 | Cable charge test data transmission method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765958A (en) * | 2020-05-26 | 2020-10-13 | 山东大学 | Vibration type identification method and system based on distributed optical fiber vibration radial distance measurement |
| CN112748293A (en) * | 2020-12-22 | 2021-05-04 | 国网湖北省电力有限公司电力科学研究院 | Measuring system for internal space charge distribution of high-voltage direct-current sleeve in operating state |
| CN112748293B (en) * | 2020-12-22 | 2022-09-02 | 国网湖北省电力有限公司电力科学研究院 | Measuring system for internal space charge distribution of high-voltage direct-current sleeve in operating state |
| CN115856456A (en) * | 2023-02-27 | 2023-03-28 | 国网山东省电力公司广饶县供电公司 | Cable charge test data transmission method |
| CN115856456B (en) * | 2023-02-27 | 2023-06-23 | 国网山东省电力公司广饶县供电公司 | Cable charge test data transmission method |
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| CN109782080B (en) | 2021-03-19 |
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