CN106054045A - Partial discharge detection device - Google Patents
Partial discharge detection device Download PDFInfo
- Publication number
- CN106054045A CN106054045A CN201610677442.9A CN201610677442A CN106054045A CN 106054045 A CN106054045 A CN 106054045A CN 201610677442 A CN201610677442 A CN 201610677442A CN 106054045 A CN106054045 A CN 106054045A
- Authority
- CN
- China
- Prior art keywords
- detection device
- controller
- signal
- discharge detection
- local discharge
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
Abstract
The invention discloses a partial discharge detection device, and the device comprises a controller. The controller is connected with an amplification sampling circuit, and the amplification sampling circuit is connected with an A/D conversion circuit. The A/D conversion circuit is connected with a supersonic wave sensor and a pulse generator. The controller and the A/D conversion circuit are connected with a storage unit, and the controller is also connected with a display. The controller is connected with a server through a communication unit. The device can detect the partial discharge of power equipment in real time, and prevents a condition that a fault of the power equipment cannot be known from causing a severer result.
Description
Technical field
The invention belongs to technical field of electric power detection, particularly to a kind of local discharge detection device.
Background technology
So-called shelf depreciation, refers under electric field action, and in Electric Power Equipment Insulation system, discharge in only subregion,
And do not extend through and execute between alive conductor, the phenomenon punctured the most not yet occurs.The main cause producing shelf depreciation is electricity
Medium uneven, the electric field intensity that each region of insulator is born is uneven, reaches disruptive field intensity in some region electric field intensity
And discharge, and other region remains in that the characteristic of insulation.In electric product, conventional solid or fluid insulation are total not
The purest densification may be made, be typically different the foreign body comprising some dispersibility of degree, such as various impurity, moisture, stingy
Bubble etc..Some causes in the fabrication process, some be in operation insulant aging, decomposition etc. during produce
's.Due to conductance and the dielectric constant different insulative thing of these foreign bodies, therefore under applied voltage effect, will tool near these impurity
Have than the most higher field intensity.When applied voltage is increased to a certain degree, the field intensity at these positions has exceeded material at this
Free field intensity, will occur shelf depreciation at this.Even if not containing foreign body in media as well, if in Electric Field Distribution pole in medium
Uneven, it is also possible to there is shelf depreciation.Such as, the needlepoint electrode being embedded in dielectric or the burr of electrode surface have
It is probably the reason producing shelf depreciation.Although the shelf depreciation in power equipment is only limitted to subrange, but discharges each time
Some all can be had dielectric to affect, so will result in dielectric insulating strength and progressively decline.Generally, slight local is put
The impact of electricity all media is less, and the decline process of dielectric strength is slower；And the impact of strong shelf depreciation medium is relatively big, absolutely
Edge intensity quickly declines, and this is the key factor causing High-Voltage Insulation to damage.Along with electronics, the ion produced during shelf depreciation is past
Impact insulant again, insulant can be made gradually to decompose, destroy.Therefore, when the insulating Design of high-tension electricity equipment, consider
Under the effect of term Voltage, in not allowing insulation system, there is stronger shelf depreciation.Operating power equipment to be added
Strong monitoring, when local is discharged beyond to a certain degree, should be out of service by equipment, overhaul or change.
Therefore, a kind of local discharge detection device is needed now badly, it is possible to detect the shelf depreciation of power equipment in real time, it is to avoid
Power equipment breaks down and cannot learn, thus causes more serious consequence.
Summary of the invention
The present invention proposes a kind of local discharge detection device, solves power equipment in prior art because shelf depreciation goes out
The problem that existing fault can not find in time.
The technical scheme is that and be achieved in that: local discharge detection device, including controller, it is characterised in that
Described controller connects amplification sample circuit, and described amplification sample circuit connects A/D change-over circuit, and described A/D changes electricity
Road connects ultrasonic sensor and pulse generator, and described controller and A/D change-over circuit connect memorizer, described control
Device connects display, and described controller is connected by communication unit server.
As one preferred embodiment, described pulse generator produces instantaneous voltage change at equipment two ends to be detected
Changing, the change of this instantaneous voltage produces pulse current in the loop, and the impedance after testing of this impulse circuit produces pulse voltage, sampling
Shown by display after amplification.
As one preferred embodiment, coupled being capacitively coupled to of transient voltage change detects impedance, produces in loop
Raw pulse current, pulse current impedance after testing produces pulse voltage.
As one preferred embodiment, it is provided with at front end between described ultrasonic sensor and A/D change-over circuit
Reason circuit, the signal that ultrasonic sensor is received by described front-end processing circuit carries out Phototube Coupling, the most amplified sampling electricity
Road is amplified sampling processing, and when sampled result is beyond pre-set threshold value, prompting exists partial discharge phenomenon.
As one preferred embodiment, described ultrasonic sensor includes housing and is arranged in described housing
Damping block, is provided with piezoelectric chip bottom described damping block, be provided with protecting film, on described damping block bottom described piezoelectric chip
Side is provided with binding post, and described binding post connects has conductive lever, described conductive lever part to run through described housing.
As one preferred embodiment, the partial enlargement parameter of equipment to be detected is transmitted to service by described controller
Device, the minimum discharge cycle of described server statistics equipment to be detected and maximum pd quantity, controller connects has alarm unit, often
Individual minimum discharge cycle, controller controls alarm unit and carries out instruction of reporting to the police.
As one preferred embodiment, the homologous pair sexual relationship of ultrasonic signal and discharge capacity is set up, according to correspondence
Relation and ultrasonic signal amplitude determine discharge capacity maximum.
As one preferred embodiment, determine discharge capacity maximum first, first according to the feedback of ultrasonic sensor,
Controller is determined discharge waveform by the amplitude of ultrasonic signal, frequency and discharge cycle.
As one preferred embodiment, described display virtual oscillography display discharge waveform.
As one preferred embodiment, described amplification sample circuit receives signal input by signalling channel, by office
Portion's discharge signal is enlarged into level signal, amplifies sample circuit and receives reference signal by signal by reference signal, through frequency spectrum
Export after migration.
After have employed technique scheme, the invention has the beneficial effects as follows: by ultrasonic sensor and pulse generator
Detect the local discharge signal of power equipment in real time, and by a series of process, make Partial Discharge enter over the display
Row display, can effectively learn the shelf depreciation situation of power equipment, thus the personnel that maintain easily carry out the dimension of power equipment
Protect, it is to avoid the fault being difficult to retrieve occurs in power equipment, and even causes security incident.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the block diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, this local discharge detection device, including controller, it is characterised in that described controller connects to be put
Big sample circuit, described amplification sample circuit connects A/D change-over circuit, and described A/D change-over circuit connects supersonic sensing
Device and pulse generator, described controller and A/D change-over circuit connect memorizer, and described controller connects display, institute
State controller and have server by communication unit connection.
Described pulse generator produces instantaneous voltage change at equipment two ends to be detected, and this instantaneous voltage changes in the loop
Produce pulse current, the impedance after testing of this impulse circuit is produced pulse voltage, is shown by display after amplifier.
Coupled being capacitively coupled to of transient voltage change detects impedance, produces pulse current in loop, and pulse current is through inspection
Survey impedance and produce pulse voltage.
Front-end processing circuit, described front-end processing circuit it is provided with between described ultrasonic sensor and A/D change-over circuit
The signal that ultrasonic sensor receives is carried out Phototube Coupling, and the most amplified sample circuit is amplified sampling processing, when adopting
When sample result is beyond pre-set threshold value, there is partial discharge phenomenon in prompting.
Described ultrasonic sensor includes housing and is arranged at the damping block in described housing, sets bottom described damping block
Being equipped with piezoelectric chip, be provided with protecting film bottom described piezoelectric chip, described damping block is provided above binding post, described wiring
Post connects has conductive lever, described conductive lever part to run through described housing.
The partial enlargement parameter of equipment to be detected is transmitted to server by described controller, and described server statistics is to be detected
The minimum discharge cycle of equipment and maximum pd quantity, controller connects alarm unit, each minimum discharge cycle, controller control
Alarm unit processed carries out instruction of reporting to the police.
Set up the homologous pair sexual relationship of ultrasonic signal and discharge capacity, determine according to corresponding relation and ultrasonic signal amplitude
Discharge capacity maximum.
Determining discharge capacity maximum first, first according to the feedback of ultrasonic sensor, controller is by the width of ultrasonic signal
Value, frequency and discharge cycle determine discharge waveform.
Described display virtual oscillography display discharge waveform.
Described amplification sample circuit receives signal by signalling channel and inputs, and local discharge signal is enlarged into level letter
Number, amplify sample circuit and receive reference signal by signal by reference signal, export after frequency spectrum migrates.
The operation principle of this local discharge detection device is: detect electricity in real time by ultrasonic sensor and pulse generator
The local discharge signal of power equipment, and by a series of process, make Partial Discharge show over the display, permissible
Effectively learn the shelf depreciation situation of power equipment, thus the personnel that maintain easily carry out the maintenance of power equipment, it is to avoid electric power
There is the fault being difficult to retrieve in equipment, and even causes security incident.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. a local discharge detection device, including controller, it is characterised in that described controller connects amplification sampling electricity
Road, described amplification sample circuit connects A/D change-over circuit, and described A/D change-over circuit connects ultrasonic sensor and pulse
Generator, described controller and A/D change-over circuit connect memorizer, and described controller connects display, described controller
Connected by communication unit and have server.
Local discharge detection device the most according to claim 1, it is characterised in that described pulse generator sets to be detected
Standby two ends produce instantaneous voltage change, and the change of this instantaneous voltage produces pulse current, by this impulse circuit after testing in the loop
Impedance produces pulse voltage, is shown by display after amplifier.
Local discharge detection device the most according to claim 2, it is characterised in that transient voltage changes coupled electric capacity coupling
Closing detection impedance, produce pulse current in loop, pulse current impedance after testing produces pulse voltage.
Local discharge detection device the most according to claim 3, it is characterised in that described ultrasonic sensor turns with A/D
Changing and be provided with front-end processing circuit between circuit, the signal that ultrasonic sensor is received by described front-end processing circuit carries out photoelectricity
Isolation, the most amplified sample circuit is amplified sampling processing, and when sampled result is beyond pre-set threshold value, prompting exists local
Electric discharge phenomena.
Local discharge detection device the most according to claim 4, it is characterised in that described ultrasonic sensor includes housing
And it is arranged at the damping block in described housing, it is provided with piezoelectric chip bottom described damping block, sets bottom described piezoelectric chip
Being equipped with protecting film, described damping block is provided above binding post, and described binding post connects conductive lever, described conductive lever portion
Divide and run through described housing.
Local discharge detection device the most according to claim 5, it is characterised in that described controller is by equipment to be detected
The transmission of partial enlargement parameter to server, the minimum discharge cycle of described server statistics equipment to be detected and maximum pd quantity,
Controller connects alarm unit, and each minimum discharge cycle, controller controls alarm unit and carries out instruction of reporting to the police.
Local discharge detection device the most according to claim 6, it is characterised in that set up ultrasonic signal and discharge capacity
Homologous pair sexual relationship, determines discharge capacity maximum according to corresponding relation and ultrasonic signal amplitude.
Local discharge detection device the most according to claim 7, it is characterised in that determine discharge capacity maximum first, first
According to the feedback of ultrasonic sensor, controller is determined discharge waveform by the amplitude of ultrasonic signal, frequency and discharge cycle.
Local discharge detection device the most according to claim 8, it is characterised in that described display virtual oscillography shows puts
Electrical waveform.
Local discharge detection device the most according to claim 9, it is characterised in that described amplification sample circuit is by letter
The input of number channel receiving signal, is enlarged into level signal by local discharge signal, amplifies sample circuit and passes through reference by signal
Signal receives reference signal, exports after frequency spectrum migrates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677442.9A CN106054045A (en) | 2016-08-16 | 2016-08-16 | Partial discharge detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677442.9A CN106054045A (en) | 2016-08-16 | 2016-08-16 | Partial discharge detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106054045A true CN106054045A (en) | 2016-10-26 |
Family
ID=57195130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610677442.9A Pending CN106054045A (en) | 2016-08-16 | 2016-08-16 | Partial discharge detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106054045A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387760A (en) * | 2018-12-29 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of shelf depreciation quantitative detection system and method based on fiber grating |
| CN110658431A (en) * | 2019-11-03 | 2020-01-07 | 西南交通大学 | Power cable terminal moisture invasion degree monitoring and evaluating method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1218555A (en) * | 1996-03-15 | 1999-06-02 | Abb研究有限公司 | Method and apparatus for space-charge measurement in cables using pulsed electroacoustic method |
| US20030214307A1 (en) * | 2002-03-29 | 2003-11-20 | Chang-Won Kang | Device for detecting partial discharge in power equipment using radiated electromagnetic wave |
| KR20110105963A (en) * | 2010-03-22 | 2011-09-28 | 엘에스전선 주식회사 | Apparatus for predicting defect location of cable and method thereof |
| CN102353881A (en) * | 2011-07-12 | 2012-02-15 | 江苏镇安电力设备有限公司 | Online capacitor monitoring system based on partial discharge monitoring |
| CN203054162U (en) * | 2012-12-10 | 2013-07-10 | 铜仁供电局 | Comprehensive tester for partial discharge of high-voltage cable |
| CN103926513A (en) * | 2014-04-30 | 2014-07-16 | 国网河南省电力公司商丘供电公司 | Portable ultrasonic online detection partial discharge diagnostic device |
| CN104833726A (en) * | 2015-04-09 | 2015-08-12 | 安庆市紫韵电子商务有限公司 | Piezoelectric ultrasonic probe apparatus |
| CN105510783A (en) * | 2015-12-30 | 2016-04-20 | 华北电力大学 | Switchgear partial discharge detecting system based on ultrasonic signal |
| CN205210249U (en) * | 2015-12-17 | 2016-05-04 | 朱琦 | Partial discharge detector system based on ultrasonic sensor |
-
2016
- 2016-08-16 CN CN201610677442.9A patent/CN106054045A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1218555A (en) * | 1996-03-15 | 1999-06-02 | Abb研究有限公司 | Method and apparatus for space-charge measurement in cables using pulsed electroacoustic method |
| US20030214307A1 (en) * | 2002-03-29 | 2003-11-20 | Chang-Won Kang | Device for detecting partial discharge in power equipment using radiated electromagnetic wave |
| KR20110105963A (en) * | 2010-03-22 | 2011-09-28 | 엘에스전선 주식회사 | Apparatus for predicting defect location of cable and method thereof |
| CN102353881A (en) * | 2011-07-12 | 2012-02-15 | 江苏镇安电力设备有限公司 | Online capacitor monitoring system based on partial discharge monitoring |
| CN203054162U (en) * | 2012-12-10 | 2013-07-10 | 铜仁供电局 | Comprehensive tester for partial discharge of high-voltage cable |
| CN103926513A (en) * | 2014-04-30 | 2014-07-16 | 国网河南省电力公司商丘供电公司 | Portable ultrasonic online detection partial discharge diagnostic device |
| CN104833726A (en) * | 2015-04-09 | 2015-08-12 | 安庆市紫韵电子商务有限公司 | Piezoelectric ultrasonic probe apparatus |
| CN205210249U (en) * | 2015-12-17 | 2016-05-04 | 朱琦 | Partial discharge detector system based on ultrasonic sensor |
| CN105510783A (en) * | 2015-12-30 | 2016-04-20 | 华北电力大学 | Switchgear partial discharge detecting system based on ultrasonic signal |
Non-Patent Citations (2)
| Title |
|---|
| 张晓蓉: "《高电压技术》", 31 July 2014, 中国电力出版社 * |
| 郑文栋 等: "多传感器联合检测技术在XLPE电缆附件局部放电定位中的试验研究", 《电力系统保护与控制》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387760A (en) * | 2018-12-29 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of shelf depreciation quantitative detection system and method based on fiber grating |
| CN110658431A (en) * | 2019-11-03 | 2020-01-07 | 西南交通大学 | Power cable terminal moisture invasion degree monitoring and evaluating method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107407708B (en) | Partial discharge detection system | |
| CN108562834B (en) | High-voltage cable partial discharge online monitoring system and amplitude correction method | |
| CN202256581U (en) | Partial discharge UHF signal envelope detection apparatus | |
| CN103529371A (en) | Invasive online monitoring device for partial discharge of power distribution equipment | |
| CN106054045A (en) | Partial discharge detection device | |
| JP5224825B2 (en) | Insulation monitoring device | |
| CN106249054B (en) | Capacitance type voltage transformer and integrated detection sensor thereof | |
| KR101456137B1 (en) | High voltage distributing board, low voltage distributing board, motor contorl board, distributing board for detecting arc or corona discharge using transient earth voltage signal | |
| CN1244819C (en) | On-line detector for insulation of cross-linked polythylene power cable sheath | |
| KR102453119B1 (en) | Arc detecting device of power supply system and arc detecting method using the same | |
| CN203572916U (en) | Intrusion type power distribution apparatus partial discharge on-line monitoring device | |
| CN106324329B (en) | Overvoltage self-adaptive identification method and system based on D-dot principle | |
| CN116593842A (en) | Cable partial discharge detection system and method with broadband and filtering functions | |
| JP2008191113A (en) | Partial discharge detector for cable end terminal part | |
| CN103558505B (en) | Line flashover fault detection method is with Installed puts | |
| CN2550770Y (en) | Portable zero value insulator ground detector | |
| CN205156847U (en) | Transformer winding deformation band electric detection means | |
| CN208188258U (en) | A kind of distribution facility pd monitoring system | |
| CN205090931U (en) | Transformer winding deformation band electrical detection circuitry | |
| CN205081467U (en) | Be applied to end screen protection circuit that electric -examination of transformer winding deformation band was surveyed | |
| CN210664586U (en) | Cubical switchboard state monitoring sensor subassembly | |
| CN201984134U (en) | 500KV crosslinked-cable local-discharge on-line monitoring device | |
| CN202502199U (en) | Cable ultrahigh frequency partial discharge detection apparatus | |
| CN110865283A (en) | Bandwidth-adjustable partial discharge ground electric wave signal processing method | |
| CN217007599U (en) | Switch cabinet partial discharge on-line monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161026 |
|
| RJ01 | Rejection of invention patent application after publication |