CN106680619A - Cable ampacity test system - Google Patents
Cable ampacity test system Download PDFInfo
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- CN106680619A CN106680619A CN201611044293.9A CN201611044293A CN106680619A CN 106680619 A CN106680619 A CN 106680619A CN 201611044293 A CN201611044293 A CN 201611044293A CN 106680619 A CN106680619 A CN 106680619A
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- Prior art keywords
- cable
- current
- temperature
- test cable
- carrying capacity
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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
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- General Physics & Mathematics (AREA)
- Ventilation (AREA)
Abstract
The invention provides a cable ampacity test system, which comprises a ventilation system, a wind speed detection device, a temperature regulation device, a temperature detection device, an ampacity detection device and a control device, wherein the control device is electrically connected with the temperature detection device, the wind speed detection device and the ampacity detection device for receiving the detected temperature, the detected wind speed and the detected ampacity and building a corresponding relationship among the temperature, the wind speed and the ampacity. Air flow is generated on the surface of a tested cable through the ventilation system, the ampacity and the wind speed are regulated through the temperature regulation device and the wind speed detection device controlled by the control device, the temperature of a tested cable loop and the nearby air is detected through the temperature detection device, and thus, the corresponding relationship among the ampacity of the tested cable, the wind speed and the temperature can be obtained, and accurate basis is provided for technical parameters and a ventilation strategy in the ventilation system of a cable line.
Description
Technical field
The present invention relates to technical field of power systems, in particular to a kind of current-carrying capacity of cable pilot system.
Background technology
At present, it is relatively conventional in power cable line that (including laid in raceway groove, laid in tunnel) is laid in air
System of laying.Under this laid condition, cable is to determine cable integral heat sink ability with the convection heat transfer' heat-transfer by convection of external environment condition
Key factor.Convection heat transfer' heat-transfer by convection is relevant with the speed of air flow in cable surface near zone and direction.Grasp current-carrying capacity of cable
With the corresponding relation of wind speed in tunnel, the technical parameter and Ventilation Strategies of pair determination exhaust system have great importance.
At present, related current-carrying capacity of cable calculates the computational methods that standard not yet determines current-carrying capacity of cable under different wind speed,
Generally calculated using empirical equation in research and engineering practice, but also have that calculating process is cumbersome, formula versatility leaves a question open
Problem.It is also the method commonly used in engineering to improve tunnel inner cable line energizing flow amount using air forced circulation.Utility model is special
Profit《A kind of batch (-type) cable tunnel ventilation cooling device》(application number：201320144850.X) propose one kind and be installed in cable
Intermittent ventilation cooling device in tunnel ventilation well, the device includes temperature acquisition component, controller of fan and blower fan.This is special
Profit controls the startup and closing of blower fan by comparing tunnel inner cable temperature and atmosphere outside temperature, makes temperature in tunnel
It is maintained within a certain range, is not directed to the calculating of ventilation wind speed and current-carrying capacity.
The content of the invention
In consideration of it, the present invention proposes a kind of current-carrying capacity of cable pilot system, it is intended to solve in the prior art due to can not
Determine that the technical parameter of exhaust system in cable run caused by the relation between current-carrying capacity and wind speed is difficult to accurate determination
Problem.
On one side, the present invention proposes a kind of current-carrying capacity of cable pilot system, for test cable loop, the experiment system
System includes：Ventilating system, the air outlet that the test cable in the test cable loop corresponds in the ventilating system is set；
Wind speed detection device, the wind speed for detecting the test cable present position；Temperature-adjusting device, with the test cable phase
Connection, the temperature for adjusting the test cable；Temperature-detecting device, for detecting the temperature of the test cable and described
Air themperature at test cable present position；Current-carrying amount detecting device, is connected with the test cable, described for detecting
Current-carrying capacity in test cable；Control device, examines with the temperature-detecting device, the wind speed detection device and the current-carrying capacity
Survey device to electrically connect, for receiving temperature, wind speed and the current-carrying capacity of detection, and set up the temperature, the wind speed and institute
State the corresponding relation between current-carrying capacity.
Further, in above-mentioned current-carrying capacity of cable pilot system, the temperature-adjusting device is current generating apparatus, described
Control device is connected with the current generating apparatus, the size for adjusting electric current in the current generating apparatus.
Further, in above-mentioned current-carrying capacity of cable pilot system, the cable testing loop also includes：Aluminium is arranged；Wherein, institute
State aluminium row two ends to be connected with the test cable respectively, form closed-loop path；Also, the aluminium row is arranged in the electric current hair
Generating apparatus；Or the two ends of the aluminium row are connected with the current generating apparatus respectively；Or the two ends difference of the test cable
It is connected with the current generating apparatus.
Further, in above-mentioned current-carrying capacity of cable pilot system, the current generating apparatus are induced-current heater
Or DC current generator.
Further, in above-mentioned current-carrying capacity of cable pilot system, the temperature-detecting device includes:First TEMP
Device, second temperature sensor and three-temperature sensor；Wherein, the insulation of first temperature sensor and the test cable
Layer is connected, the surface temperature for detecting the test cable；The second temperature sensor is near the experiment electricity
Cable is set, for detecting the air themperature at the test cable present position；The three-temperature sensor and the experiment
The conductor part of cable is connected, the conductor temperature for detecting the test cable.
Further, in above-mentioned current-carrying capacity of cable pilot system, the ventilating system includes：Air-supply arrangement and air draft are filled
Put；Wherein, the air-supply arrangement is set near the first end of the test cable, and the air exhausting device is near the test cable
The second end set.
Further, in above-mentioned current-carrying capacity of cable pilot system, the air outlet of the air-supply arrangement, the air exhausting device
Air inlet is arranged in a linear with the test cable.
Further, in above-mentioned current-carrying capacity of cable pilot system, the air-supply arrangement and the air exhausting device are symmetrical
At the two ends of the test cable.
Further, in above-mentioned current-carrying capacity of cable pilot system, the control device is connected with the ventilating system, uses
In the wind direction and wind speed that adjust the ventilating system.
Further, in above-mentioned current-carrying capacity of cable pilot system, the wind speed detection device is airspeedometer；And/or it is described
Temperature-detecting device is thermocouple.
In the present invention, air flow is produced on test cable surface by ventilating system, temperature is controlled by control device
Adjusting means, wind speed detection device regulation current-carrying capacity and wind speed size, and test cable loop is detected by temperature-detecting device
And the temperature of neighbouring air, you can the corresponding relation between test cable current-carrying capacity and wind speed, temperature is obtained, in cable run
The technical parameter and Ventilation Strategies of exhaust system provide accurate foundation.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the structural representation of current-carrying capacity of cable pilot system provided in an embodiment of the present invention.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.Conversely, there is provided these embodiments are able to be best understood from the disclosure, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.It should be noted that in the case where not conflicting, embodiment in the present invention and
Feature in embodiment can be mutually combined.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to Fig. 1, the preferred structure of current-carrying capacity of cable pilot system provided in an embodiment of the present invention is shown in figure.As schemed
Shown, the pilot system includes：Ventilating system 1, wind speed detection device 3, temperature-adjusting device 4, temperature-detecting device 5, current-carrying
Amount detecting device (not shown) and control device 6.
Wherein, test cable loop 2 is that test cable 21 is connected the closed-loop path to be formed with other wires or equipment, is made
Alived inside test cable 21.The air outlet that test cable 21 corresponds in ventilating system 1 is set, and ventilating system 1 is used for
The air flow of orientation is formed on the surface of test cable 21.
Wind speed detection device 3 can be arranged near test cable 21, the wind for detecting the present position of test cable 21
Speed.During specific implementation, wind speed detection device 3 can be airspeedometer.
Temperature-adjusting device 4 is connected with test cable 21, the temperature for adjusting test cable 21.Specifically, temperature
Adjusting means is used to adjust the temperature of test cable 21, so that the electric current in test cable 21 can reach current-carrying capacity.
Temperature-detecting device 5 can be arranged in test cable loop 2 or near test cable loop 2, for detecting
Air themperature at the temperature of test cable 21 and the present position of test cable 21.During specific implementation, temperature-detecting device can be with
It is thermocouple.
Current-carrying amount detecting device is connected with test cable 21, the current-carrying capacity for detecting test cable 21.Control device 6
Electrically connected with temperature-detecting device 5, wind speed detection device 3 and current-carrying amount detecting device, temperature, wind speed for receiving detection
And current-carrying capacity, and the corresponding relation set up between temperature, wind speed and current-carrying capacity.Specifically, temperature can be test cable 21
Conductor temperature or test cable 21 surface temperature or the present position of test cable 21 at air themperature.Temperature, wind speed and
Corresponding relation between current-carrying capacity can be：When the temperature stabilizes, the relation between current-carrying capacity and wind speed, or when current-carrying capacity is steady
Regularly, the relation between temperature and wind speed, or when wind speed stabilization, the relation between current-carrying capacity and temperature.
During experiment, wind-force is applied to the surface of test cable 21 by ventilating system 1, adjusted by temperature-adjusting device 4 and tried
The temperature of electrical verification cable 21, and experiment of the test cable 21 under different wind speed, different temperatures is detected by current-carrying amount detecting device
Electric current, to set up the corresponding relation between current-carrying capacity, wind speed and temperature.
As can be seen that in the present embodiment, air flow is produced on test cable surface by ventilating system, by controlling to fill
Control temperature-adjusting device, wind speed detection device regulation current-carrying capacity and wind speed size are put, and examination is detected by temperature-detecting device
Test the temperature of cable loop and neighbouring air, you can obtain the corresponding relation between test cable current-carrying capacity and wind speed, temperature, give
The technical parameter and Ventilation Strategies of exhaust system provide accurate foundation in cable run.
In above-described embodiment, temperature-adjusting device 4 can be current generating apparatus, and current generating apparatus are returned with test cable
Road is connected, to produce lasting electric current in test cable.Control device 6 is connected with current generating apparatus, for adjusting
The amplitude or size of electric current in current generating apparatus.Current generating apparatus can be that induced-current heater or DC current are sent out
Raw device.When current generating apparatus are induced-current generating means, it can be made in test cable loop 2 by control device 6
It is middle to produce the electric current of amplitude stability, and then allow that the temperature of test cable 21 in process of the test at a time keeps stabilization
Value.
In the various embodiments described above, cable testing loop 2 also includes：Aluminium row 22.Wherein, 22 two ends of aluminium row are electric with experiment respectively
Cable 21 is connected, and forms closed-loop path.Also, when current generating apparatus are induced-current generating means, aluminium row 22 is arranged in
Induced-current generating means；When current generating apparatus be DC generator when, aluminium row 22 two ends respectively with current generating apparatus
It is connected；Or the two ends of test cable 21 are connected with current generating apparatus respectively.As can be seen that the structure of test cable loop 2
Simply so that process of the test is easily carried out.
In the various embodiments described above, temperature-detecting device 5 can include:First temperature sensor, second temperature sensor and
Three-temperature sensor 51.Wherein, the first temperature sensor (not shown) is connected with the insulating barrier of test cable 21, uses
In the surface temperature of detection test cable 21.Second temperature sensor (not shown) is set near test cable 21, is used for
Air themperature at detection test cable 21 present position.Three-temperature sensor 51 is connected with the conductor part of test cable 21
Connect, the conductor temperature for detecting test cable 21.
As can be seen that by multiple temperature sensors conductor respectively to test cable 21, insulating barrier and test cable
The temperature of air is measured at 21 present positions, is conducive to improving test cable conductor or test cable surface or test cable
The temperature of air at present position, between wind speed and current-carrying capacity corresponding relation formula the degree of accuracy.
In the various embodiments described above, ventilating system 1 can include：Air-supply arrangement 11 and air exhausting device 12.Wherein, air-supply arrangement
11 first ends (left end shown in Fig. 1) for being close to test cable 21 are set, and air exhausting device 12 is close to the second of test cable 21
End (right-hand member shown in Fig. 1) is set.
As can be seen that the arrangement of air-supply arrangement 11 and air exhausting device 12 so that air flow can effectively be distributed in experiment electricity
The region of the near surface of cable 21.
Preferably, the air outlet of air-supply arrangement 11, the air inlet of air exhausting device 12 and test cable 21 are arranged in a linear, with
So that air flow more fully acts on test cable surface, so as to accelerate the radiating rate on test cable surface.
It is further preferred that air-supply arrangement 11 and air exhausting device 12 are symmetrically distributed in the two ends of test cable 21.Can be
Orientation, the air flow of stabilization are realized in the region of the near surface of test cable 21, are conducive to the accurate regulation of wind speed in experiment, carry
The degree of accuracy of relational expression between wind speed and temperature, current-carrying capacity high.
In the various embodiments described above, control device 6 is connected with ventilating system 1, wind direction and wind for adjusting ventilating system 1
Speed.The data that control device can be obtained according to temperature-detecting device 5 and current-carrying amount detecting device, real-time adjustment wind speed and wind
To improve the efficiency of experiment.
In sum, the current-carrying capacity of cable pilot system in the present embodiment can accurately determine test cable current-carrying capacity and wind
Corresponding relation between speed, temperature, technical parameter and Ventilation Strategies to exhaust system in cable run provide accurate foundation.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of current-carrying capacity of cable pilot system, for test cable loop, it is characterised in that including：
Ventilating system (1), the test cable (21) in the test cable loop (2) is corresponding in the ventilating system (1)
Air outlet is set；
Wind speed detection device (3), the wind speed for detecting the test cable (21) present position；
Temperature-adjusting device (4), is connected with the test cable (21), the temperature for adjusting the test cable (21)；
Temperature-detecting device (5), temperature and the test cable (21) present position for detecting the test cable (21)
The air themperature at place；
Current-carrying amount detecting device, is connected with the test cable (21), the current-carrying capacity for detecting the test cable (21)；
Control device (6), with the temperature-detecting device (5), the wind speed detection device (3) and the current-carrying amount detecting device
Electrically connect, for receiving temperature, wind speed and the current-carrying capacity of detection, and set up the temperature, the wind speed and the current-carrying
Corresponding relation between amount.
2. current-carrying capacity of cable pilot system according to claim 1, it is characterised in that the temperature-adjusting device (4) is
Current generating apparatus, the control device (6) is connected with the current generating apparatus, for adjusting the current generating apparatus
The size of middle electric current.
3. current-carrying capacity of cable pilot system according to claim 2, it is characterised in that the cable testing loop (2) is also
Including：Aluminium arranges (22)；Wherein,
Described aluminium row (22) two ends are connected with the test cable (21) respectively, form closed-loop path, also, the aluminium is arranged
(22) current generating apparatus are arranged in；Or
The two ends of aluminium row (22) are connected with the current generating apparatus respectively；Or
The two ends of the test cable (21) are connected with the current generating apparatus respectively.
4. current-carrying capacity of cable pilot system according to claim 2, it is characterised in that the current generating apparatus are sensing
Electric current heater or DC current generator.
5. current-carrying capacity of cable pilot system according to claim 1, it is characterised in that
The temperature-detecting device (5) includes:First temperature sensor, second temperature sensor and three-temperature sensor
(51)；Wherein,
First temperature sensor is connected with the insulating barrier of the test cable (21), for detecting the experiment electricity
The surface temperature of cable (21)；
The second temperature sensor is set near the test cable (21), for detecting position residing for the test cable (21)
Put the air themperature at place；
The three-temperature sensor (51) is connected with the conductor part of the test cable (21), for detecting the experiment
The conductor temperature of cable (21).
6. current-carrying capacity of cable pilot system according to any one of claim 1 to 5, it is characterised in that the ventage
System (1) includes：Air-supply arrangement (11) and air exhausting device (12)；Wherein,
The air-supply arrangement (11) is set near the first end of the test cable (21), and the air exhausting device (12) is near described
Second end of test cable (21) is set.
7. current-carrying capacity of cable pilot system according to any one of claim 1 to 5, it is characterised in that the air-supply dress
The air outlet of (11), the air inlet of the air exhausting device (12) is put to be arranged in a linear with the test cable (21).
8. current-carrying capacity of cable pilot system according to any one of claim 1 to 5, it is characterised in that the air-supply dress
Put (11) and the air exhausting device (12) is symmetrically distributed in the two ends of the test cable (21).
9. current-carrying capacity of cable pilot system according to any one of claim 1 to 5, it is characterised in that the control dress
Put (6) to be connected with the ventilating system (1), wind direction and wind speed for adjusting the ventilating system (1).
10. current-carrying capacity of cable pilot system according to any one of claim 1 to 5, it is characterised in that
The wind speed detection device (3) is airspeedometer；And/or
The temperature-detecting device (5) is thermocouple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044293.9A CN106680619A (en) | 2016-11-24 | 2016-11-24 | Cable ampacity test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044293.9A CN106680619A (en) | 2016-11-24 | 2016-11-24 | Cable ampacity test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106680619A true CN106680619A (en) | 2017-05-17 |
Family
ID=58866512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611044293.9A Pending CN106680619A (en) | 2016-11-24 | 2016-11-24 | Cable ampacity test system |
Country Status (1)
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| CN107192918A (en) * | 2017-05-29 | 2017-09-22 | 西南交通大学 | Vehicle-mounted cable termination leakage current testing System and method at a temperature of particular surroundings |
| CN111239532A (en) * | 2020-03-11 | 2020-06-05 | 远东电缆有限公司 | Copper-aluminum cable current-carrying capacity and temperature rise testing method |
| CN112199869A (en) * | 2020-09-03 | 2021-01-08 | 国网浙江省电力有限公司电力科学研究院 | Cable current-carrying capacity calculation method considering cable channel ventilation characteristic |
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Application publication date: 20170517 |