CN106054037A - Electrical tree observation device with heating and partial discharge monitoring functions - Google Patents
Electrical tree observation device with heating and partial discharge monitoring functions Download PDFInfo
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- CN106054037A CN106054037A CN201610421855.0A CN201610421855A CN106054037A CN 106054037 A CN106054037 A CN 106054037A CN 201610421855 A CN201610421855 A CN 201610421855A CN 106054037 A CN106054037 A CN 106054037A
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- partial discharge
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- electrical tree
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- 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
- G01R31/1227—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 of components, parts or materials
- G01R31/1263—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Abstract
The invention relates to an electrical tree observation device with heating and partial discharge monitoring functions in insulation of polymers and nano compounds thereof, and belongs to the field of electrical insulation state monitoring. The device comprises a high-voltage experiment system with a temperature control function, a partial discharge signal acquisition and processing system and an optical real-time observation system; the device is used for perfecting the current digital camera acquisition system for observing an electrical tree phenomenon; and an electrical tree experiment device with accurate temperature control and real-time partial discharge detection functions is provided. The device can be used for real-time observation, acquisition and processing of images in the electrical tree branching process of room temperature to 180 DEG C, and synchronous acquisition, display, storage and processing of partial discharge signals at the same time. The device is simple in structure and flexible in function; the detection functions of temperature, images and partial discharge in an electrical tree experiment can be realized respectively or simultaneously; and the device can provide more comprehensive experimental data for theoretical analysis of the electrical tree experiment and online monitoring of polymer aging.
Description
Technical field
The present invention relates under temperature match curing conditions in insulating material of polymer electrical treeing phenomenon and with shelf depreciation
Real-time detection apparatus, belong to electric insulation status monitoring field.
Background technology
The polymerization species insulant as representative with polyethylene and crosslinked polyethylene, due to its excellence electrical insulation capability and
Processing characteristics is widely used as the insulation for high-tension electricity equipment.Along with electrical grid transmission electric pressure and the raising of capacity, to electricity
Power is apparatus insulated has higher requirement, and therefore, improves insulant proof voltage grade and Electrical aging can be
Ensure the important foundation of power equipment safety stable operation.
In polyethylene and crosslinked polyetylene insulated high voltage power cable, the raising of electric pressure can cause polymer exhausted
Edge produces electrical tree aging process phenomenon.The generation of electric branch and development can cause the deterioration of insulation even to be lost efficacy, and serious threat is high
The life-span of piezoelectric forces cable and the operational reliability of electrical network.
As long as exceeding half a century for the research of electrical treeing phenomenon, in order to more effectively prevent electric branch from producing and suppression
Electric branch develops, and the inherent mechanism of electric branch growth has become as the study hotspot of scholar.Can be adjoint in electric branch evolution
Partial discharge phenomenon, the real-time change of partial discharge phenomenon is closely related with the growth conditions of electric branch.Power equipment insulate
The operating temperature of structure is usually above ambient temperature, and temperature conditions can affect kinestate and then the impact of polymer macromolecule chain
Its resistance to electrical treeing performance.By electric branch growing state under simulation different temperatures, detection branch growth course is adjoint simultaneously
Local discharge characteristic, can be that in polymer, the theory analysis of electric branch development provides accurately completely experimental data.
Carrying out insulating material of polymer in the system of electric branch experiment at present, also not having can be in the accurate control of experimental temperature
The lower experimental provision synchronizing to carry out electric branch growth real-time monitored with shelf depreciation Real-time Collection of system.The disclosedest Patents
In " electric branch growth course partial-discharge measuring device and method in crosslinking polyethylene-insulated cable insulation " (CN 103616618A),
The continuous measurement of shelf depreciation in electric branch growth course is achieved under room temperature state;" electricity in a kind of polymer heated up
Poplar bundles real-time observation device " in (CN 204855715U), it is achieved that the real-time monitored of electricity tree under different temperatures." high voltage skill
Art " experiment disclosed in the paper " growth characteristics of electric branch in XLPE cable under different temperatures " delivered on Vol.36 No.10
System, it is achieved that carry out the initiation of electric branch and the detection of shelf depreciation at a certain temperature, but experimental sample is positioned at and adds hot tank
In cannot be carried out the observation of electric branch growth course.At " High-Voltage Technology " Vol.38 No.3 and " insulant " Vol.44
The paper delivered on No.4 " growth of 110kV twisted polyethylene cable electric branch and Characteristics of Partial Discharge under high temperature " and " under high temperature
Electric branch Design of Test System in crosslinking polyethylene-insulated cable insulation " disclosed in experimental system, heater utilizes oil circulation
Medium residing for heating sample, utilizes thermometer to carry out temperature survey and lacks feedback and the real-time monitoring measuring temperature.
The accurately control of experimental temperature affects accuracy and the repeatability of experimental result, and then affects theory analysis and ginseng
Number calculates.Optical system can only observe the material that transparency is good at ambient temperature, and for translucent or opaque nanometer
Composite observation more difficulty.
Summary of the invention
It is an object of the present invention to provide a kind of poplar bundles experiment dress with accurate temperature control and real-time Partial Discharge Detection
Put.This unit simulation insulating material of polymer electric branch at the working temperature produces and development condition, and experimental result can be more
The resistance to voltage ageing characteristic of real reaction material.Under different temperatures real-time to electric branch growthform and local discharge signal
Gathering and analyze, the Electrical aging for nano composite material can detect and electric branch growth mechanism analysis provides experimental data.
Of the present invention is treeing phenomenon observation system in a kind of polymer with the real-time Partial Discharge Detection of liter gentleness
System, including having temperature controlled High-Voltage Experiment system, local discharge signal collection and processing system, optics real-time monitored system
System.
Of the present invention have temperature controlled High-Voltage Experiment system and include: puts experimental transformer without office, pressure regulator,
There is a liter Laboratory Module for gentle incubation and thermal insulation function, temperature sensor and controller, needle electrode and plate electrode.Pressure regulator with without office
Put experimental transformer and coordinate the alternating voltage output that can realize 0 ~ 50kV, it is provided that experimental voltage;Laboratory Module has oil resistant and Nai Gao
Warm nature energy, in experimentation, Laboratory Module is placed in insulating oil built with high temperature resistant and transparent insulating oil, sample and electrode, real
Hatch checking contains former and later two high temperature resistant quartz glass windows of coaxial high transparency, the real-time sight of electrical treeing in experimentation
Surveying, around form, inlaid heat-insulating material is used for keeping temperature in Laboratory Module, reduces Laboratory Module temperature to photographic head and area source
Impact.Sensor, controller form the Real-time Feedback to temperature and control, resistance to oil temperature sensor with the intensification module of Laboratory Module
Room temperature can be realized to 250 ° of C, it is possible to achieve the electric tree aging under the conditions of room temperature to 180 ° C is real with the scope of controller temperature control
Test;In experimentation, needle electrode connects high voltage input terminal, plate electrode ground connection.
Local discharge signal collection of the present invention includes with processing system: Luo-coil sensor, oscillograph, calculating
Machine.In experimentation, Luo-coil sensor gathers local discharge signal by the pulse current on detection ground wire, collects
Local discharge signal pulse shows on oscillograph in real time, and oscillograph is by pulsed current signal transmission to computer simultaneously, utilizes
Labview software platform in computer carries out storage and the process of data, and the time-frequency domain that can realize local discharge signal turns
Change.Shelf depreciation acquisition system after check can realize the accuracy of detection of 5pC.
Optics real-time monitored system of the present invention includes: put area source without office, digital camera system, air cooling equipment,
Three-dimensional localization regulating platform, computer.Putting area source without office and provide near-infrared source of parallel light, in work process, discharge off signal produces
Raw, do not disturb the measurement of shelf depreciation.Digital camera system contains focal length enlarging lens, the running parameter of selected enlarging lens
As follows: operating distance is 50 ~ 350mm, amplification is 0.83 times to 10 times, and the observation depth of field is 7.9 microns to the maximum, and resolution is
0.96 micron.Area source, focal length enlarging lens and numeral microscope camera coordinate, can be with the electrical treeing in Real-time Collection sample
Image, contains the electric branch image information of standard proportional chi and experimental period by Real time vision, can realize reality simultaneously
Time video recording, the measurement function of regularly sectional drawing, tree length, width, angle.Air cooling equipment is opened when high temperature is tested, and passes through
Air circulation radiating mode makes camera lens and area source normally work in allowing temperature.Three-dimensional localization regulating platform can accurately control
Focal length enlarging lens and the position of digital camera, it is ensured that the clear and amplification of image accurate.
Advantages of the present invention: of the present invention have intensification and the polymer of partial discharge monitoring function and nano-complex
Electrical treeing observation device, can realize room temperature and set performance test to the electric of 180 ° of C, can carry out the real-time sight of electric branch image simultaneously
Survey record and the collection of local discharge signal, store and process.To obtaining polymer and nano-complex under actual work temperature
The micro image of middle electric branch landslide evolution process and the real time record of adjoint local discharge signal, it is provided that effectively study
Means;This device can be not only that the theory analysis of electrostrictive polymer poplar bundles provides more comprehensively data, is also polymer simultaneously
The on-line monitoring system exploitation of insulation ag(e)ing state and the process of local discharge signal provide theoretical foundation.
Accompanying drawing explanation
Fig. 1 is the electricity tree observation device structural representation with intensification and partial discharge monitoring function of the present invention;
In figure: 1 Laboratory Module, 2 area sources, 3 air cooling equipments, 4 quartz glass windows, 5 plate electrodes, 6 samples, 7 needle electrodes, 8 ground connection
Line, 9 focal length enlarging lens, 10 digital micro-analysis video cameras, 11 three-dimensional localization regulating platforms, 12 computers, 13 pressure regulators, 14 experiments become
Depressor, 15 Luo-coil sensors, 16 shielded boxes, 17 oscillographs, 18 temperature controllers, 19 temperature sensors.
Detailed description of the invention
Detailed description of the invention one: there is described in present embodiment intensification and the polymer of partial discharge monitoring function and nanometer
Complex electrical treeing observation device, including having Laboratory Module (1) that is heat insulation and that rise temperature function, area source (2), air cooling equipment
(3), quartz glass window (4), plate electrode (5), sample (6), needle electrode (7), earth lead (8), focal length enlarging lens (9), number
Word microscope camera (10), three-dimensional localization regulating platform (11), computer (12), pressure regulator (13), experimental transformer (14), Roche
Coil pickoff (15), shielded box (16), oscillograph (17), temperature controller (18), temperature sensor (19);Laboratory Module (1)
Upper containing heatproof upper cover Han circular hole, Laboratory Module fills with heating with thermal insulation layer, the end and two sides containing two sides before and after form
Put;Temperature sensor (19) is positioned at test coupon (6) 5cm, temperature sensor (19), temperature controller (18) and heater
Form temperature feedback system, the ambient temperature of real-time inspection and control experimental sample (6).
Detailed description of the invention two: equipped with heatproof transparent insulation oil, sample (6), needle electrode (7) in Laboratory Module (1) during experiment
It is all placed in insulating oil with plate electrode (5), by the output voltage of pressure regulator (13) Control release transformator (14), area source
(2), Laboratory Module form (4), sample (6), focal length enlarging lens (9) are positioned at same axis, it is achieved electrical treeing in experimentation
Real-time monitored, three-dimensional localization regulating platform (11) can accurately control focal length enlarging lens (9) and the position of digital camera (10)
Putting, it is ensured that the clear and amplification of image accurate, the electric tree Image that focal length enlarging lens (9) gathers passes through microscope camera
And computer (12) realizes record and the measurement of image (10).
Detailed description of the invention three: in experimentation, earth lead (8) passes Luo-coil sensor (15), Luo-coil senses
Device (15) is placed in shielded box (16) to prevent the interference of outer signals, and Luo-coil sensor (15) is by detection earth lead
(8) in, pulse current gathers local discharge signal, and the local discharge signal pulse collected shows the most in real time at oscillograph (17),
Pulsed current signal is transmitted to computer (12) by oscillograph (17) simultaneously, utilizes the Labview software in computer (12) to put down
Platform carries out storage and the process of data, can realize the time-frequency domain conversion of local discharge signal.Shelf depreciation collection after check
System can realize the accuracy of detection of 5pC.
Claims (4)
1. there is intensification and the polymer of partial discharge monitoring function and nano-complex electrical treeing observation device, including having
The heat insulation Laboratory Module (1) with liter temperature function, area source (2), air cooling equipment (3), quartz glass window (4), plate electrode (5), examination
Sample (6), needle electrode (7), earth lead (8), focal length enlarging lens (9), digital micro-analysis video camera (10), three-dimensional localization regulating platform
(11), computer (12), pressure regulator (13), experimental transformer (14), Luo-coil sensor (15), shielded box (16), oscillography
Device (17), temperature controller (18), temperature sensor (19).
The most according to claim 1, there is intensification and the polymer of partial discharge monitoring function and nano-complex electrical treeing
Observation device, it is characterised in that Laboratory Module (1) contains the upper cover of circular hole containing heatproof, Laboratory Module contains containing two sides before and after form
Having thermal insulation layer, heater is contained in its excess-three side;Temperature sensor (19) is positioned at test coupon (6) 5cm, temperature sensing
Device (19), temperature controller (18) and heater form temperature feedback system, in real time monitoring and accurate Control release sample (6)
The temperature of environment, room temperature is tested to the electrical treeing to 180 ° of C.
The most according to claim 1, there is intensification and the polymer of partial discharge monitoring function and nano-complex electrical treeing
Observation device, equipped with heatproof transparent insulation oil in Laboratory Module (1), sample (6), needle electrode (7) and plate electrode (5) are all placed in insulation
In oil, by the output AC voltage 0 of pressure regulator (13) Control release transformator (14) to 50kV, area source (2), Laboratory Module regard
Window (4), sample (6), focal length enlarging lens (9) are positioned at same axis, it is achieved the real-time monitored of electrical treeing in experimentation, and three
Dimension location regulating platform (11) can accurately control focal length enlarging lens (9) and the position of digital camera (10), it is ensured that image
The clear accurate amplification with 1 times to 10 times, the electric tree Image that focal length enlarging lens (9) gathers passes through microscope camera (10)
With record and the measurement that computer (12) realizes image.
The most according to claim 1, there is intensification and the polymer of partial discharge monitoring function and nano-complex electrical treeing
Observation device, earth lead (8) pass Luo-coil sensor (15), Luo-coil sensor (15) be placed in shielded box (16) with
Preventing the interference of outer signals, Luo-coil sensor (15) gathers shelf depreciation by pulse current in detection earth lead (8)
Signal, the local discharge signal pulse collected is in the upper display in real time of oscillograph (17), and oscillograph (17) is by pulse current simultaneously
Signal transmits to computer (12), utilizes the Labview software platform in computer (12) to carry out storage and the process of data, can
Realizing the time-frequency domain conversion of local discharge signal, shelf depreciation acquisition system can realize the accuracy of detection of 0.1mV and 5pC.
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Cited By (10)
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CN106501277A (en) * | 2016-11-02 | 2017-03-15 | 华北电力大学(保定) | The alterating and direct current branch microscopic observation system of synchronzed press temperature-controllable and method |
CN106990337A (en) * | 2017-05-09 | 2017-07-28 | 西安交通大学 | A kind of detection means and method that shelf depreciation is measured under thermograde |
CN107091974A (en) * | 2016-10-26 | 2017-08-25 | 哈尔滨理工大学 | A kind of electric branch path partially Discharge analysis system based on LabVIEW |
CN109001599A (en) * | 2018-07-05 | 2018-12-14 | 天津大学 | Direct current cables insulating materials high temperature ageing degree assessment method based on Composite Field |
CN110057816A (en) * | 2019-03-20 | 2019-07-26 | 天津大学 | The appraisal procedure of insulating materials senile experiment device based on electro thermal coupling field |
CN110658429A (en) * | 2019-11-03 | 2020-01-07 | 西南交通大学 | Method for estimating length of electric branch in crosslinked polyethylene cable insulation of power distribution network |
CN110879336A (en) * | 2018-09-06 | 2020-03-13 | 东芝三菱电机产业系统株式会社 | Insulation life test method and insulation test body |
CN111025104A (en) * | 2019-12-27 | 2020-04-17 | 哈尔滨理工大学 | Temperature-adjustable polymer electric tree growth observation system |
US20210349141A1 (en) * | 2020-05-06 | 2021-11-11 | Baker Hughes Holdings Llc | Charge detection and quantization |
CN114167755A (en) * | 2021-12-13 | 2022-03-11 | 华北电力大学(保定) | Method for establishing digital twin model for polymer electric tree development |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN107091974A (en) * | 2016-10-26 | 2017-08-25 | 哈尔滨理工大学 | A kind of electric branch path partially Discharge analysis system based on LabVIEW |
CN106501277B (en) * | 2016-11-02 | 2018-10-26 | 华北电力大学(保定) | The alterating and direct current branch microscopic observation system and method for synchronzed press temperature-controllable |
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CN106990337B (en) * | 2017-05-09 | 2019-11-08 | 西安交通大学 | A kind of detection device and method measuring shelf depreciation under temperature gradient |
CN106990337A (en) * | 2017-05-09 | 2017-07-28 | 西安交通大学 | A kind of detection means and method that shelf depreciation is measured under thermograde |
CN109001599A (en) * | 2018-07-05 | 2018-12-14 | 天津大学 | Direct current cables insulating materials high temperature ageing degree assessment method based on Composite Field |
CN110879336A (en) * | 2018-09-06 | 2020-03-13 | 东芝三菱电机产业系统株式会社 | Insulation life test method and insulation test body |
CN110057816A (en) * | 2019-03-20 | 2019-07-26 | 天津大学 | The appraisal procedure of insulating materials senile experiment device based on electro thermal coupling field |
CN110658429A (en) * | 2019-11-03 | 2020-01-07 | 西南交通大学 | Method for estimating length of electric branch in crosslinked polyethylene cable insulation of power distribution network |
CN110658429B (en) * | 2019-11-03 | 2021-03-23 | 西南交通大学 | Method for estimating length of electric branch in crosslinked polyethylene cable insulation of power distribution network |
CN111025104A (en) * | 2019-12-27 | 2020-04-17 | 哈尔滨理工大学 | Temperature-adjustable polymer electric tree growth observation system |
US20210349141A1 (en) * | 2020-05-06 | 2021-11-11 | Baker Hughes Holdings Llc | Charge detection and quantization |
US11796585B2 (en) * | 2020-05-06 | 2023-10-24 | Baker Hughes Holdings Llc | Charge detection and quantization |
CN114167755A (en) * | 2021-12-13 | 2022-03-11 | 华北电力大学(保定) | Method for establishing digital twin model for polymer electric tree development |
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