CN109633398A - A kind of hts power cable termination flash-over characteristic improved method - Google Patents
A kind of hts power cable termination flash-over characteristic improved method Download PDFInfo
- Publication number
- CN109633398A CN109633398A CN201910082677.7A CN201910082677A CN109633398A CN 109633398 A CN109633398 A CN 109633398A CN 201910082677 A CN201910082677 A CN 201910082677A CN 109633398 A CN109633398 A CN 109633398A
- Authority
- CN
- China
- Prior art keywords
- power supply
- sample
- positive
- direct current
- hot pressing
- 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
- G01R31/20—Preparation of articles or specimens to facilitate testing
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention discloses a kind of hts power cable termination flash-over characteristic improved method, key step includes: to test nonlinear conductance epoxy specimens piece used using physical blending process and the preparation of the mould heat pressure method of forming first, coupons having a size of 50mm × 50mm, with a thickness of 0.5mm, mold is stainless steel mould, hot pressing temperature is 120 DEG C, and hot pressing pressure is 1.3MPa；Secondly, building experiment porch, high voltage power supply connects column electrode, and ring electrode connects ground wire, and heating sheet is placed between two panels sample, and whole system is put into cryogenic Dewar bottle, is full of liquid nitrogen in cryogenic Dewar bottle；Finally, carrying out repeating experiment of pressurizeing respectively to sample using positive and negative direct current high voltage power supply, positive negative pulse stuffing power supply and positive and negative direct current power supply superposition positive negative pulse stuffing power supply, per sample (p.s.) carries out ten repetition pressurization experiments.Under the superposition source condition for applying different electrical power form, the discharge voltage of nonlinear conductance epoxy specimens is still significantly improved the present invention compared with conventional epoxies sample.
Description
Technical field
The invention belongs to high-tension apparatus technical fields, and in particular to a kind of high-temperature superconductor electricity based on non-linear epoxy resin
Cable terminal flash-over characteristic improved method.
Background technique
High-temperature superconductor (High Temperature Superconducting, HTS) cable is passed by it compared to tradition
Defeated route transmission capacity is big, the low advantage of loss is quickly grown.Epoxy resin is because of its excellent mechanical performance and insulation performance quilt
It is elected to be the major insulation material of hts power cable termination.Attached drawing 1 show hts power cable termination sectional view, insulation fault master
To occur along three paths in figure.That mainly study herein is path C: the creeping discharge situation in liquid nitrogen.Liquid-solid boundary
Creeping discharge be the main of direct-current high-temperature superconducting (High Temperature Superconducting, HTS) cable termination
Insulation fault.Therefore the invention proposes a kind of methods with nonlinear conductance epoxy resin replacement conventional epoxies.It will pass
After system epoxy resin replaces with nonlinear conductance epoxy resins insulation, applies flash-over characteristic under different electrical power polarity and obtain significantly
Improve, creeping discharge voltage increase 50% in liquid nitrogen.The raising of the results show application nonlinear conductance epoxy resin is put along face
The feasibility of piezoelectric voltage is expected to be used widely in direct-current high-temperature superconducting cable terminal.
Summary of the invention
It is an object of the invention to be improved in direct-current high-temperature superconducting cable terminal using nonlinear conductance epoxy resin along face
Discharge voltage improves flash-over characteristic.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows: a kind of hts power cable termination electric discharge is special
Property improved method, includes the following steps:
1) nonlinear conductance epoxy specimens piece used is tested using physical blending process and the preparation of the mould heat pressure method of forming,
Coupons having a size of 50mm × 50mm, with a thickness of 0.5mm, mold is stainless steel mould, and hot pressing temperature is 120 DEG C, hot pressing pressure
For 1.3MPa；
2) build experiment porch, high voltage power supply connects column electrode, and ring electrode connects ground wire, heating sheet be placed in two panels sample it
Between, whole system is put into cryogenic Dewar bottle, is full of liquid nitrogen in cryogenic Dewar bottle；
3) respectively using positive and negative direct current high voltage power supply, positive negative pulse stuffing power supply and positive and negative direct current power supply superposition positive negative pulse stuffing electricity
Source carries out sample to repeat experiment of pressurizeing, and per sample (p.s.) carries out ten repetition pressurization experiments, and the rate of rise is before direct current ± 12kV
The rate of rise is 0.05kV/s after 0.1kV/s, direct current arrival ± 12kV, until generation until discharging, records sample under liquid nitrogen
Discharge voltage.
Beneficial effect
By attached drawing 2 as it can be seen that under liquid nitrogen environment, the discharge voltage of nonlinear conductance epoxy specimens is compared with conventional epoxy tree
Rouge is significantly increased, especially in the case where applying negative pulse power conditions, discharge voltage is increased to by original -17.4kV -
25kV, discharge voltage promote 50%.By attached drawing 3 as it can be seen that under the superposition source condition for applying different electrical power form, non-linear electricity
The discharge voltage for leading epoxy specimens is still significantly improved compared with conventional epoxies sample.Therefore this improved method is expected to
It is used widely in hts power cable termination.
Detailed description of the invention
Fig. 1 hts power cable termination sectional view.
Fig. 2 applies the discharge voltage of sample under different electrical power:
(a) positive voltage；(b) negative voltage.
Fig. 3 applies the discharge voltage of sample under superposition power supply:
(a) positive direct-current+positive pulse；(b) negative direct current+negative pulse.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
The invention proposes a kind of hts power cable termination flash-over characteristic improved method, specific steps include:
Firstly, testing nonlinear conductance epoxy specimens used using physical blending process and the preparation of the mould heat pressure method of forming
Piece, coupons having a size of 50mm × 50mm, with a thickness of 0.5mm, mold is stainless steel mould, and hot pressing temperature is 120 DEG C, hot pressing pressure
It is by force 1.3MPa.The specific proportion of sample material of the present invention is as shown in table 1.
(2) experiment porch is built, high voltage power supply connects column electrode, and ring electrode connects ground wire, and heating sheet is placed in two panels sample
Between, whole system is put into cryogenic Dewar bottle, is full of liquid nitrogen in cryogenic Dewar bottle.
(3) positive negative pulse stuffing is superimposed using positive and negative direct current high voltage power supply, positive negative pulse stuffing power supply and positive and negative direct current power supply respectively
Power supply carries out sample to repeat experiment of pressurizeing, and per sample (p.s.) carries out ten repetition pressurization experiments, the rate of rise before direct current ± 12kV
For 0.1kV/s, the rate of rise is 0.05kV/s after direct current arrival ± 12kV, until generation until discharging, records sample under liquid nitrogen
Discharge voltage.
(4) data are handled, linear fit is carried out using least square method, draws Weibull distribution probability graph, calculate data
Average and standard deviation draws scatter plot, obtains the flashover voltage value that probability of flashover is 63.2%, records the voltage value, draws
Line chart.
1 nonlinear conductance epoxy specimens formula of table
Embodiment
(1) prepared by sample: by according to the formula in table 1, being prepared used in experiment using physical blending process and the mould heat pressure method of forming
Nonlinear conductance epoxy specimens piece, coupons having a size of 50mm*50mm, with a thickness of 0.5mm, hot pressing temperature is 120 DEG C, heat
Pressure pressure is 1.3MPa.
(2) experimental provision is built: by pressure-variable DC power output end through protecting water resistance to be connected to column electrode, while from column
Electrode outlet line is connected to divider, and multimeter is adjusted to DC voltage shelves, connects the signal end in divider；By ring electrode with
Ground wire connection, the ground wire equipotential with DC power supply；Nichrome film is placed between two panels sample, by ring electrode and column electrode
It is placed in specimen surface；Electrode, sample, nichrome film are put into cooled cryostat and inject liquid nitrogen under normal pressure, to device
Cooling be preparing experiment after liquid level is tranquil completely.
(3) it pressurization experiment: is superimposed respectively using positive and negative direct current high voltage power supply, positive negative pulse stuffing power supply and positive and negative direct current power supply
Positive negative pulse stuffing power supply carries out repeating to pressurize testing to sample, ten repetition pressurization experiments of per sample (p.s.) progress, before direct current ± 12kV
The rate of rise is 0.1kV/s, and the rate of rise is 0.05kV/s after direct current arrival ± 12kV, until generation until discharging, records liquid
The discharge voltage of sample under nitrogen.
(4) data are handled: carrying out linear fit using least square method, draws Weibull distribution probability graph, calculate data
Average and standard deviation draws scatter plot, obtains the flashover voltage value that probability of flashover is 63.2%, records the voltage value, draws
Line chart.
The above content is all according to the present patent application patent it cannot be assumed that these explanations are only limited in specific implementation of the invention
The equivalent change and modification done in range all should belong to the scope of patent protection that claims that the present invention is submitted determine
Within.
Claims (1)
1. a kind of hts power cable termination flash-over characteristic improved method, which comprises the steps of:
1) nonlinear conductance epoxy specimens piece used, sample are tested using physical blending process and the preparation of the mould heat pressure method of forming
Chip size is 50mm × 50mm, with a thickness of 0.5mm, and mold is stainless steel mould, and hot pressing temperature is 120 DEG C, and hot pressing pressure is
1.3MPa；
2) experiment porch is built, high voltage power supply connects column electrode, and ring electrode connects ground wire, and heating sheet is placed between two panels sample,
Whole system is put into cryogenic Dewar bottle, is full of liquid nitrogen in cryogenic Dewar bottle；
3) positive negative pulse stuffing power supply pair is superimposed using positive and negative direct current high voltage power supply, positive negative pulse stuffing power supply and positive and negative direct current power supply respectively
Sample carries out repeating experiment of pressurizeing, and per sample (p.s.) carries out ten repetition pressurization experiments, and the rate of rise is before direct current ± 12kV
The rate of rise is 0.05kV/s after 0.1kV/s, direct current arrival ± 12kV, until generation until discharging, records sample under liquid nitrogen
Discharge voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910082677.7A CN109633398A (en) | 2019-01-28 | 2019-01-28 | A kind of hts power cable termination flash-over characteristic improved method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910082677.7A CN109633398A (en) | 2019-01-28 | 2019-01-28 | A kind of hts power cable termination flash-over characteristic improved method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109633398A true CN109633398A (en) | 2019-04-16 |
Family
ID=66062475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910082677.7A Pending CN109633398A (en) | 2019-01-28 | 2019-01-28 | A kind of hts power cable termination flash-over characteristic improved method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109633398A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988618A (en) * | 2019-11-19 | 2020-04-10 | 中国科学院电工研究所 | Point heat source safety assessment experiment platform |
| CN111157857A (en) * | 2020-01-03 | 2020-05-15 | 天津大学 | Device for testing surface discharge characteristic of low-temperature insulating material with controllable environmental temperature |
| CN112072606A (en) * | 2020-07-31 | 2020-12-11 | 深圳供电局有限公司 | Three-phase coaxial superconducting cable terminal system and assembling method thereof |
| CN112798893A (en) * | 2021-01-19 | 2021-05-14 | 中天集团上海超导技术有限公司 | Superconducting cable short sample test platform |
| CN117269697A (en) * | 2023-10-26 | 2023-12-22 | 国网上海市电力公司 | Ultrasonic detection system and method for partial discharge of superconducting cable installed in Dewar |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108241019A (en) * | 2018-01-15 | 2018-07-03 | 天津大学 | A kind of high-temperature superconductor insulating materials flashover property test device and method |
-
2019
- 2019-01-28 CN CN201910082677.7A patent/CN109633398A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108241019A (en) * | 2018-01-15 | 2018-07-03 | 天津大学 | A kind of high-temperature superconductor insulating materials flashover property test device and method |
Non-Patent Citations (2)
| Title |
|---|
| 李昂: "基于高压直流GIS盆式绝缘子基材的环氧树脂表面电荷积累与抑制方法研究", 《中国博士学位论文全文数据库（电子期刊）工程科技Ⅱ辑》 * |
| 李昂等: "环氧树脂非线性电导复合材料表面电荷与沿面闪络特性研究", 《绝缘材料》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988618A (en) * | 2019-11-19 | 2020-04-10 | 中国科学院电工研究所 | Point heat source safety assessment experiment platform |
| CN110988618B (en) * | 2019-11-19 | 2022-08-09 | 中国科学院电工研究所 | Point heat source safety assessment experiment platform |
| CN111157857A (en) * | 2020-01-03 | 2020-05-15 | 天津大学 | Device for testing surface discharge characteristic of low-temperature insulating material with controllable environmental temperature |
| CN112072606A (en) * | 2020-07-31 | 2020-12-11 | 深圳供电局有限公司 | Three-phase coaxial superconducting cable terminal system and assembling method thereof |
| CN112072606B (en) * | 2020-07-31 | 2021-12-07 | 深圳供电局有限公司 | Three-phase coaxial superconducting cable terminal system and assembling method thereof |
| CN114284764A (en) * | 2020-07-31 | 2022-04-05 | 深圳供电局有限公司 | Three-phase coaxial superconducting cable terminal system and assembling method thereof |
| CN114284764B (en) * | 2020-07-31 | 2023-07-07 | 深圳供电局有限公司 | Three-phase coaxial superconducting cable terminal system and assembling method thereof |
| CN112798893A (en) * | 2021-01-19 | 2021-05-14 | 中天集团上海超导技术有限公司 | Superconducting cable short sample test platform |
| CN117269697A (en) * | 2023-10-26 | 2023-12-22 | 国网上海市电力公司 | Ultrasonic detection system and method for partial discharge of superconducting cable installed in Dewar |
| CN117269697B (en) * | 2023-10-26 | 2024-05-31 | 国网上海市电力公司 | Dewar-mounted long-distance superconducting cable partial discharge ultrasonic detection system and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109633398A (en) | A kind of hts power cable termination flash-over characteristic improved method | |
| Li et al. | Surface functional graded spacer for compact HVDC gaseous insulated system | |
| CN106970307A (en) | A kind of test device and method of high-voltage direct-current cable accessory electric branch characteristic | |
| Lin et al. | Novel HVDC spacers by adaptively controlling surface charges–part iii: industrialization prospects | |
| Du et al. | Electrical tree characteristics of XLPE under repetitive pulse voltage in low temperature | |
| Kim et al. | Electrical insulation characteristics of PPLP as a HTS DC cable dielectric and GFRP as insulating material for terminations | |
| Du et al. | Tree initiation characteristics of epoxy resin in Ln 2 for superconducting magnet insulation | |
| Baek et al. | Cryogenic electrical insulation characteristics of solid insulator for the HVDC HTS cable | |
| Du et al. | Fabrication and electrical evaluation of interfacial E-field regulating insulator for DC-GIL application | |
| Kwag et al. | The electrical insulation characteristics for a HTS cable termination | |
| Zheng et al. | Electrical tree characteristics of epoxy resin/AlN nanocomposites in LN 2 with repetitive nanosecond pulse voltage | |
| Du et al. | Characterization of Partial Discharge With Polyimide Film in $\hbox {LN} _ {2} $ Considering High Temperature Superconducting Cable Insulation | |
| Du et al. | Surface potential behavior of fluorinated polyimide film under low temperature | |
| Preuß | Development of high-temperature superconductor cables for high direct current applications | |
| Han et al. | Partial discharge characteristics during treeing process in silicone rubber at 20 and− 100° C | |
| Hayakawa et al. | Volume effect of dynamic breakdown strength in liquid nitrogen under transient bubble disturbance for resistive superconducting fault current limiters | |
| Du et al. | Surface flashover characteristics of fluorinated polyimide films in liquid nitrogen | |
| CN109494029A (en) | A kind of superconduction GIL insulator electric field homogenization process based on surface graded conductance | |
| Park et al. | Effects of temperature and voltage on dielectric breakdown strengths of PET and FRP under mechanical stresses | |
| Zha et al. | Influence of Bubbles on Insulation Properties of LN 2 for SFCL Under Lightning Impulse and DC Voltage | |
| Yang et al. | Research on forming mechanism of surface discharge paths for solid dielectric with different shapes under micro-second impulse in liquid nitrogen | |
| Fang et al. | Effect of temperature gradient on electrical tree in XLPE from 0 to− 196° C | |
| Winkel et al. | Investigations on the dielectric strength of syntactic foam at cryogenic temperature and the impact of the filler material on the volume shrinkage | |
| Li et al. | Nonlinear conductivity of SiC/epoxy resin composites dependent on electric-field at cryogenic temperature | |
| Zhao et al. | Transient characteristics of YBCO tapes under pulsed current and pressures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190416 |