CN105445586A - Load temperature rise test method for power cable for thermonuclear fusion - Google Patents
Load temperature rise test method for power cable for thermonuclear fusion Download PDFInfo
- Publication number
- CN105445586A CN105445586A CN201510882309.2A CN201510882309A CN105445586A CN 105445586 A CN105445586 A CN 105445586A CN 201510882309 A CN201510882309 A CN 201510882309A CN 105445586 A CN105445586 A CN 105445586A
- Authority
- CN
- China
- Prior art keywords
- load
- power cable
- conductor
- temperature
- equipment
- 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
- 238000010998 test method Methods 0.000 title abstract description 6
- 230000004927 fusion Effects 0.000 title abstract 3
- 239000004020 conductor Substances 0.000 claims abstract description 24
- 238000009413 insulation Methods 0.000 claims description 13
- 238000002474 experimental method Methods 0.000 claims description 7
- 230000001681 protective Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 abstract 3
- 239000011241 protective layer Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001052 transient Effects 0.000 description 1
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
Abstract
The invention discloses a load temperature rise test method for a power cable for thermonuclear fusion. The load temperature rise test method comprises the steps: utilizing load equipment to test a power cable which requires to be tested, wherein the power cable includes a conductor, and an insulating layer, a metal braid over braid shielding layer and an external protective layer are successively arranged at the periphery of the conductor; during the testing process, utilizing four groups of temperature displays to monitor the temperatures of the conductor, the insulating layer, the external protective layer and the environment, and utilizing two groups of time relays to perform switch control of the load equipment, wherein one group of time relays are set as 1000s and are under the equipment-on state and the other group of time relays are set as 2600s and are under the equipment-off state; and utilizing a pulse circulation method of the load 1800A, the load time 1000s and the zero load 2600s to carry out the test. The load temperature rise test method can accurately detect the stable performance shown by the power cable in the high temperature resistant and current impact resistant environment, and is suitable for a small sun project thermonuclear fusion system.
Description
Technical field
The present invention relates to the load temperature-raising experimental method of thermofusion power cable.
Background technology
The plan of International Thermonuclear reactor experiment formally started on November 21st, 2006, and this plan is called as the maximum hope that the mankind finally solve energy crisis.EAST is much less in scale than International Thermonuclear reactor experiment, but both full superconduction on-circular cross-section tokamak devices.The successful operation of EAST, will make significant contribution for the plan of International Thermonuclear reactor experiment.This kind of thermofusion power cable need apply the operating mode of pulse current impact to cable, to cable load 1800A, duration of load application 1000s, unloaded 2600s, iterative cycles like this, so this type of cable needs to have the performances such as excellent high temperature resistant, anti-current impact, and show stable performance in the environment that must impact at high temperature resistant, anti-current, by current stabilization within the specific limits.Correlation technique is only studied stable current-carrying capacity, periodically current-carrying capacity before this, and in process of the test, testing precision is not very high, and this kind of pulse current impacts current-carrying capacity without correlative study.
Summary of the invention
The object of the invention is to the deficiency for existing method of testing and defect, provide a kind of load temperature-raising experimental method of thermofusion power cable, to solve the problem.
Technical matters solved by the invention can realize by the following technical solutions:
A load temperature-raising experimental method for thermofusion power cable, is characterized in that, comprise the steps:
Load equipment is utilized to test needing the power cable of test, power cable comprises conductor, insulation course is disposed with in conductor periphery, metallic braid screen layer and outer jacket, simulation is to power cable load 1800A, duration of load application 1000s, unloaded 2600s, during test, four groups of temperature indicators are utilized to monitor conductor respectively, insulation course, outer jacket and environment temperature, two groups of time relays are utilized to carry out switch control rule to load equipment, one group of time relay is set as 1000s, for opening of device state, another group time relay is set as 2600s, for device shutdown state, utilize load 1800A, duration of load application 1000s, the pulse cycle method of unloaded 2600s is tested.
In a preferred embodiment of the invention, load equipment and power cable junction are provided with four groups of contact resistance protective devices, to reduce the heat that contact resistance produces, avoid temperature distortion.
Owing to have employed technical scheme as above, the present invention accurately can detect in the environment that cable impacts at high temperature resistant, anti-current and show stable performance, is suitable for Sunny engineering thermofusion system.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, setting forth the present invention further below.
A load temperature-raising experimental method for thermofusion power cable, comprises the steps:
Load equipment is utilized to test needing the power cable of test, power cable comprises conductor, insulation course is disposed with in conductor periphery, metallic braid screen layer and outer jacket, simulation is to power cable load 1800A, duration of load application 1000s, unloaded 2600s, during test, four groups of temperature indicators are utilized to monitor conductor respectively, insulation course, outer jacket and environment temperature, two groups of time relays are utilized to carry out switch control rule to load equipment, one group of time relay is set as 1000s, for opening of device state, another group time relay is set as 2600s, for device shutdown state, utilize load 1800A, duration of load application 1000s, the pulse cycle method of unloaded 2600s is tested.
In order to reduce the heat that contact resistance produces, avoid temperature distortion, load equipment and power cable junction are provided with four groups of contact resistance protective devices.
Test sample preparation: get a finished cable 2-15m, two ends end peels off insulation and sheath 100mm expose conductor, in order to connecting electrode respectively; In the cable, equidistant 100mm place reserves cable conductor, insulation, sheath respectively in order to mounting temperature sensor, and coated closely for position similar insulation and the sheath material inserting sensor, contact firm.Then according to step below:
A. the cable prepared is put on the support of chamber, make cable unsettled.Cable is connected to load test tester two ends, and temp probe is placed in cable conductor, insulation, jacket surface and environment respectively, each point initial temperature.
B. transformer current is adjusted to 1800 (+100 ,-0), load time relay is adjusted to 1000s, and idle time, relay was adjusted to 2600s, counter O reset.Gauge tap is adjusted to external control simultaneously.
C. power switch is started, when recording each time relay redirect, cable conductor, insulation, sheath, environment temperature.
Following method is adopted to test:
Complete load 1800A, duration of load application 1000s, the theoretical and experimental investigations that unloaded 2600s pulse current changes cable temperature rise, set up pulse current model:
1. conductor temperature (ignoring heat dispersal situations) after first load
Temperature is identical and equal environment temperature everywhere to suppose cable, conductor temperature when calculating end-of-pulsing according to insulating model:
θf1＝θ0+(I2Rt/ΣCM)
In examination: θ f1 is conductor initial temperature, I load cable,
R conductor resistance, t duration of load application, C material thermal capacitance, M material weight.
2. calculate the front conductor temperature of second pulse arriving
Cable is by after initial pulse, and conductor no longer produces new heat, and start outwards to dispel the heat, conductor temperature declines, and sets up single order Transient Thermal Circuit model according to lumped parameter method.
Equivalent thermal resistance: Teq=T1+T2+T3+T4
Equivalence thermal capacitance: Qeq=3Qc+0.5 × (Qi+Qs+Qj)
Thermal time constant: τ=Teq × Qeq
Corresponding according to cable single order hot road zero condition, bring calculating into: θ L1=θ 0+ θ f1e-t/ τ
In examination: θ 0 is environment temperature, temperature when θ f1 is this end-of-pulsing, T1, T2, T3, T4 are respectively insulation, inner sheath, sheath, environment thermal resistance, and Qc, Qi, Qs, Qj are respectively conductor, insulation, inner sheath, sheath thermal capacitance.
3. iterative computation solves steady temperature
Double counting the 2nd time, 3 times, 4 times and even n subpulse are changed by rear cable temperature according to the method described above, until θ L and θ f restrains and stationary value substantially.
4., by calculating, as table 1, θ L and θ f stablizes at 59.4 DEG C and 42.1 DEG C of convergences
Concrete test findings can see table 1
Table 1
Can be obtained by above-mentioned table 1, can be learnt in the environment that thermofusion power cable impacts at high temperature resistant, anti-current by test method of the present invention and show stable performance, by current stabilization within the specific limits, stablize at 59.4 DEG C and 42.1 DEG C of convergences, be suitable for Sunny engineering thermofusion system.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (2)
1. a load temperature-raising experimental method for thermofusion power cable, is characterized in that, comprise the steps:
Load equipment is utilized to test needing the power cable of test, power cable comprises conductor, insulation course is disposed with in conductor periphery, metallic braid screen layer and outer jacket, simulation is to power cable load 1800A, duration of load application 1000s, unloaded 2600s, during test, four groups of temperature indicators are utilized to monitor conductor respectively, insulation course, outer jacket and environment temperature, two groups of time relays are utilized to carry out switch control rule to load equipment, one group of time relay is set as 1000s, for opening of device state, another group time relay is set as 2600s, for device shutdown state, utilize load 1800A, duration of load application 1000s, the pulse cycle method of unloaded 2600s is tested.
2. the load temperature-raising experimental method of a kind of thermofusion power cable as claimed in claim 1, is characterized in that, load equipment and power cable junction are provided with four groups of contact resistance protective devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510882309.2A CN105445586A (en) | 2015-12-03 | 2015-12-03 | Load temperature rise test method for power cable for thermonuclear fusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510882309.2A CN105445586A (en) | 2015-12-03 | 2015-12-03 | Load temperature rise test method for power cable for thermonuclear fusion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105445586A true CN105445586A (en) | 2016-03-30 |
Family
ID=55556015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510882309.2A Pending CN105445586A (en) | 2015-12-03 | 2015-12-03 | Load temperature rise test method for power cable for thermonuclear fusion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105445586A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208627A (en) * | 2019-06-20 | 2019-09-06 | 应急管理部四川消防研究所 | A kind of overcurrent ignition source prevention and control device fire prevention and control aptitude tests method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887769A (en) * | 2010-06-30 | 2010-11-17 | 无锡市明珠电缆有限公司 | Cable for high-power pulse source |
| CN201868135U (en) * | 2010-12-07 | 2011-06-15 | 衡阳恒飞电缆有限责任公司 | Seabed optical fiber composite high-voltage cable with detecting function |
| CN103336023A (en) * | 2013-06-04 | 2013-10-02 | 华南理工大学 | Calculation method of thermal resistance of power cable |
| CN105044571A (en) * | 2015-07-10 | 2015-11-11 | 西安交通大学 | Distribution cable comprehensive condition online monitoring system and method with self-powered function |
| CN204855025U (en) * | 2015-07-16 | 2015-12-09 | 河北省电力勘测设计研究院 | Be used for cable intermediate head temperature field measuring temperature measurement testing system |
-
2015
- 2015-12-03 CN CN201510882309.2A patent/CN105445586A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887769A (en) * | 2010-06-30 | 2010-11-17 | 无锡市明珠电缆有限公司 | Cable for high-power pulse source |
| CN201868135U (en) * | 2010-12-07 | 2011-06-15 | 衡阳恒飞电缆有限责任公司 | Seabed optical fiber composite high-voltage cable with detecting function |
| CN103336023A (en) * | 2013-06-04 | 2013-10-02 | 华南理工大学 | Calculation method of thermal resistance of power cable |
| CN105044571A (en) * | 2015-07-10 | 2015-11-11 | 西安交通大学 | Distribution cable comprehensive condition online monitoring system and method with self-powered function |
| CN204855025U (en) * | 2015-07-16 | 2015-12-09 | 河北省电力勘测设计研究院 | Be used for cable intermediate head temperature field measuring temperature measurement testing system |
Non-Patent Citations (3)
| Title |
|---|
| 周鑫: "单芯电力电缆导体温度计算及试验研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 贾志东 等: "基于温升试验的10kV交联聚乙烯电缆冷缩终端热分析", 《高电压技术》 * |
| 陈江源 等: "基于内嵌式光纤电力电缆温度场试验研究", 《黑龙江电力》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208627A (en) * | 2019-06-20 | 2019-09-06 | 应急管理部四川消防研究所 | A kind of overcurrent ignition source prevention and control device fire prevention and control aptitude tests method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103808426B (en) | The indirect measurement method of cable core temperature | |
| CN204116460U (en) | A kind of measuring system being applicable to insulating material high field conduction characteristic | |
| CN106570289B (en) | Method for measuring temperature rise of contact under high current of low-voltage apparatus based on finite element analysis | |
| CN102880747A (en) | Method for modeling, calculating and analyzing temperature fields of photoelectric composite submarine cable | |
| Wu et al. | Modeling of current-limiting circuit breakers for the calculation of short-circuit current | |
| CN110161329A (en) | A kind of two generations high-temperature superconductor band quenches resistance simulated prediction method and system | |
| CN104052399A (en) | Device and method for estimating reliability of photovoltaic bypass diode | |
| CN105445586A (en) | Load temperature rise test method for power cable for thermonuclear fusion | |
| Smith et al. | Experimental testing and modelling of a resistive type superconducting fault current limiter using MgB2 wire | |
| Branco et al. | Proposal for an RMS thermoelectric model for a resistive-type superconducting fault current limiter (SFCL) | |
| CN103064458B (en) | A kind of based on computer-controlled electrically heated rod power control system | |
| Doukas et al. | Volume element method for thermal analysis of superconducting DC transmission cable | |
| Liu et al. | Recovery characteristics of YBCO tapes against DC over current impulse | |
| Kim et al. | Development of real time protective coordination algorithm for HTS power cable | |
| Wang et al. | Numerical simulation on fault current condition in 66 kV class RE-123 superconducting cable | |
| CN107228994B (en) | High-voltage alternating-current cable load cyclic heating method | |
| Feher et al. | Test results of shell-type Nb/sub 3/Sn dipole coils | |
| CN102998328A (en) | Test method for simulating slow cooling process | |
| CN207502610U (en) | A kind of switchgear plum blossom fingertip resistor detecting device | |
| CN107918697B (en) | Three-phase cable transient temperature rise obtaining method independent of skin temperature row pipe laying | |
| Yong-Qiang et al. | Research of temperature sensor arrangement based on transformer hot-spot temperature estimates | |
| Sheng et al. | Electrical-thermal-structural coupled finite element model of high temperature superconductor for resistive type fault current limiters | |
| CN110083905A (en) | A kind of hot(test)-spot temperature analysis method of disconnecting switch dynamic compatibilization | |
| CN204740074U (en) | Measure device of power battery group link piece temperature | |
| Fang et al. | Numerical analysis of the stability of HTS power cable under fault current considering the gaps in the cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160330 |
|
| RJ01 | Rejection of invention patent application after publication |