CN107192918B - Leakage current testing System and method for of vehicle-mounted cable termination at a temperature of particular surroundings - Google Patents
Leakage current testing System and method for of vehicle-mounted cable termination at a temperature of particular surroundings Download PDFInfo
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- CN107192918B CN107192918B CN201710394354.2A CN201710394354A CN107192918B CN 107192918 B CN107192918 B CN 107192918B CN 201710394354 A CN201710394354 A CN 201710394354A CN 107192918 B CN107192918 B CN 107192918B
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a kind of leakage current testing system of vehicle-mounted cable termination at a temperature of particular surroundings, mainly by high-temperature heating simulation system, low temperature environment simulation system, temperature controller, gas flow control system and dielectric spectroscopy test macro composition；High-temperature heating simulation system is placed in the cavity of low temperature environment simulation system, and temperature control system and leakage current testing system are placed in outside the cavity of low temperature environment simulation system.Using the solution of the present invention, the High-Voltage Experimentation of the vehicle-mounted cable of exceptional operating conditions environment temperature can be realized, measure the parameters such as leakage current of the vehicle-mounted cable under exceptional operating conditions environment temperature, cable termination integral insulation state is assessed.
Description
Technical field
The invention belongs to cable termination High-Voltage Experimentation fields, and in particular to a kind of vehicle-mounted cable termination is in particular surroundings temperature
Under leakage current testing System and method for.
Background technique
On-board high-voltage cable carries the important function of conveying electric energy, and cable use state directly affects traction power supply system
The safe and stable and economical operation of system.Cable termination is the important component of cable run, while being also in operating system
Compare weak link.Field distribution is extremely uneven at cable termination, be easy to cause the failures such as insulation breakdown.Leakage current testing
As a kind of High-Voltage Experimentation, can effective detection cable terminating insulation state, to do source to deteriorating serious terminal in time
Reason.In northwest China area, high-speed EMUs and electric locomotive pass through that area surroundings temperature change is larger when running, special fortune
Row environment causes vehicle-mounted cable termination to be easier to break down.It is relatively more tired that the complicated real working condition of simulation carries out relevant electric test
Difficulty needs to specialize in thus a kind of leakage current testing of vehicle-mounted cable termination at a temperature of particular surroundings for this operating condition
System.
Summary of the invention
The object of the present invention is to provide a kind of leakage current testing system of vehicle-mounted cable termination at a temperature of particular surroundings
With method, enables the High-Voltage Experimentation for realizing the vehicle-mounted cable of exceptional operating conditions environment temperature, measure vehicle-mounted cable special
The parameters such as the leakage current under operating condition environment temperature assess cable termination integral insulation state.
The purpose of the present invention is what is realized by following means:
The leakage current testing system of a kind of vehicle-mounted cable termination at a temperature of particular surroundings, for realizing special operation work
Cable termination leakage current experiment under condition temperature field, mainly by high-temperature heating simulation system, low temperature environment simulation system, temperature
Control system, gas flow control system and leakage current testing system composition；High-temperature heating simulation system is placed in low temperature environment simulation
In the cavity of system, temperature control system and leakage current testing system are placed in outside the cavity of low temperature environment simulation system, specifically
It constitutes are as follows:
It is heated at high temperature simulation system to constitute are as follows: test lubricating cup (15) is supported on low-temperature test chamber (14) by bracket (21)
It is interior；Test lubricating cup (15) is divided into outer wall and inner wall, and inner wall (23) is thermal insulation layer, and resistance wire (16) is arranged in test lubricating cup
(15) in wall of cup interlayer, two Leie of sensor components with eight sensors is attached to test lubricating cup (15) inner wall, in inner wall depth
Spend direction equidistant arrangement；Plexiglass cover (32) seals rim of a cup and remains in advance by being tested cable termination (19) and electrical wire
Through-hole；The electrical wire include with the resistance wire (16) that is tested in lubricating cup and sensor group and external dc power (1),
The electrical wire of temperature controller (2) connection；
The low temperature environment simulation system has low-temperature test chamber (14), is provided with air vent at the top of low-temperature test chamber (14)
(22) it is communicated with exhaust pipe (20), exhaust pipe (20) with outer gas stream regulating system (4)；Four sensors are placed in low temperature two-by-two
Chamber internal upper part and lower part；Respective through hole is reserved at the top of low-temperature test chamber (14) to accommodate tested cable termination and electrically lead
Line passes through；
The temperature controller (2) of the temperature control system is connect with each sensor；DC power supply (1) passes through conducting wire
It is connected respectively with resistance wire (16) and temperature controller (2)；PC machine (3) is connected with temperature controller (2), and according to each sensor
Gas flow control system (4) is controlled with the data of temperature controller (2) acquisition process；
The leakage current testing system is mainly by testing transformer (7), and leakage current tester (6) is constituted, pilot scale
It tests transformer (7) to be connected by conducting wire with anti-corona cover (8), anti-corona cover (8) connection cable core conductor, and leakage current tester (6)
It is connected by ground line (13) with cable shield (12), and then forms test loop；
Voltage drive is applied to cable termination (19) when test, record applies the leakage after different voltages excitation at each temperature
The data of current tester (6) realize the test to cable termination leakage current under the conditions of varying environment temperature change.
Test lubricating cup (15) external height is 600mm, lower bracket (21) vertical height 200mm, and test lubricating cup (15) is
Bilayer, lubricating cup internal layer diameter are 300mm, and outer layer diameter is 340mm, and wherein interlayer 20mm, resistance wire (16) width are 10mm, are had
Machine glass cover (32) thickness 10mm, wherein plexiglass cover (32) upper opening width is 56mm.
The object of the invention is also to provide the cable termination leakage current testing sides under the conditions of a kind of particular surroundings temperature
Method:
The cable termination leakage current experimental method under the conditions of particular surroundings temperature is carried out using system as above, including as follows
Step:
1) cable termination (19) enters test lubricating cup (15) by plexiglass cover (32), and insulating oil (17) is totally submerged absolutely
Edge full skirt (18) connects low-temperature test chamber (14) and DC power supply (1), and test lubricating cup (15) is cooled down or heated up；
2) start gas flow control system (4), accelerate pilot system internal convection speed, realize the quick variation of temperature；
3) temperature controller (2) are opened, required high-temperature temperature and cryogenic temperature and high temperature and low temperature alternating is set
The frequency and high-temperature duration of progress, low temperature continuous time；
4) after carrying out high and low temperature alternative processing to cable termination (19), call through test transformer (7), to cable termination (19)
Apply high pressure activation；
5) it is detected under the conditions of particular surroundings temperature using the leakage current tester (6) of peripheral hardware, cable termination (19)
Leakage current.
Using the solution of the present invention, the High-Voltage Experimentation of the vehicle-mounted cable of exceptional operating conditions environment temperature can be realized, measure
The parameters such as leakage current of the vehicle-mounted cable under exceptional operating conditions environment temperature comment cable termination integral insulation state
Estimate.
Detailed description of the invention
Fig. 1 experimental provision system appearance structure of the present invention and composition schematic diagram
The detailed construction dimensional drawing of lubricating cup is tested in Fig. 2 experimental provision of the present invention
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 show experimental provision surface structure of the present invention and composition schematic diagram.A kind of vehicle-mounted cable termination as shown in Figure 1
Leakage current testing System and method at a temperature of particular surroundings, the cable that can be realized under exceptional operating conditions temperature field are whole
Hold leakage current experiment, which is characterized in that experimental system mainly has by low temperature environment simulation system, hot environment simulation system,
Temperature integrated control system and leakage current testing system are constituted, in which:
The low temperature environment simulation system is mainly by temperature controller (2), No. nine sensors (33), No. ten sensors
(34), ride on Bus No. 11 sensor (35), ten No. two sensors (36), air vent (22), exhaust pipe (20), the examination of scavenger pump (5) low temperature
Tryoff (14) is constituted, in which: temperature controller (2) is used to cool down to cable termination (19)；No. nine sensors (33) and ten
No. two sensors (36) are placed at the top of low-temperature test chamber (14), and No. ten sensors (34) are placed in ride on Bus No. 11 sensor (35)
Low-temperature test chamber (14) bottom, environment temperature of four sensors to realize real-time detection low-temperature test chamber (14) each region
And data delivery temperature controller (2) are handled；Scavenger pump (5) accelerates temperature tune by the acceleration flowed to air in system
Section, achievees the purpose that quickly adjusting to cable termination (19) test temperature；Air vent (22) is placed in low-temperature test chamber (14)
It opens when scavenger pump (5) are opened to ensure chamber inner air convection current at top；
The hot environment simulation system is mainly by test lubricating cup (15), cable termination (19), insulating oil (17), resistance wire
(16), (24) No. two sensors (25) of No.1 sensor, No. three sensors (26), No. four sensors (27), No. five sensors
(28), No. six sensors (29), No. seven sensors (30), No. eight sensors (31), DC power supply (1), temperature controller (2) group
At, in which: cable termination (19) include cable conductor (9), cable major insulation (10), cable cover(ing) (11), shielded layer (12) with
And parachute skirt (18), external cable core, which installs anti-corona cover (8) additional, does measurement for partial discharge at end-winding electric discharge during eliminating test
It disturbs, in the insulating oil (17) that cable termination (19) passes through plexiglass cover (32) immersion test lubricating cup (15), makes insulating oil (17)
It is totally submerged parachute skirt (18)；Test lubricating cup (15) is divided into outer wall and inner wall, and inner wall is thermal insulation layer (23), resistance wire
(16) it is arranged in test lubricating cup (15) wall of cup interlayer, makees effectively sealing between plexiglass cover (32) and cable, test lubricating cup
(15) it is supported in low-temperature test chamber (14) by bracket (21)；Resistance wire (16) is encapsulated in test oil with high-temperature insulation adhesive tape
In cup (15) interlayer, for test lubricating cup (15) heating, resistance wire (16) passes through plexiglass cover (32) and DC power supply (1) phase
Even, temperature controller (2) is by optical fiber receiving sensor data, then is connected with DC power supply (1), controls opening for DC power supply
It is disconnected, realize, i.e., in the cable termination external environment effective control of temperature interior to test lubricating cup (15)；
The temperature integrated control system includes: PC machine (3), temperature controller (2), No.1 sensor (24), No. two biographies
Sensor (25), No. three sensors (26), No. four sensors (27), No. five sensors (28), No. six sensors (29), No. seven sensings
Device (30), No. eight sensors (31), No. nine sensors (33), No. ten sensors (34), ride on Bus No. 11 sensor (35), ten No. two biographies
Sensor (36) and its connection optical fiber, DC power supply (1), resistance wire (16) are constituted, in which: DC power supply (1) is distinguished by optical fiber
It is connected with resistance wire (16) and temperature controller (2), DC power supply (1) is regulated and controled by temperature controller (2), control electricity
Hinder the heated condition of silk (16), No.1 sensor (24), No. two sensors (25), No. three sensors (26), No. four sensors
(27), No. five sensors (28), No. six sensors (29), No. seven sensors (30), No. eight sensors (31) are spaced apart exhausted
In edge lubricating cup, and it is connected respectively with optical fiber with temperature controller (2).No. nine sensors (33) dispose with ten No. two sensors (36)
In low-temperature test chamber (14) inner top, No. ten sensors (34) and ride on Bus No. 11 sensor (35) are placed in low-temperature test chamber (14)
Bottom, and be successively connected with optical fiber with temperature controller (2), PC machine (3) is connected with temperature controller (2), and according to each sensing
The data of device and temperature controller (2) acquisition process control gas flow control system (4)；
The leakage current testing system is mainly by testing transformer (7), and leakage current tester (6) is constituted: its pilot scale
It tests transformer (7) to be connected by conducting wire with anti-corona cover (8), anti-corona cover (8) connection cable core conductor, and leakage current tester (6)
It is connected by ground line (13) with cable shield (12), and then forms test loop.Cable termination (19) are applied when test
Voltage drive, record apply the data of the leakage current tester (6) after different voltages excitation at each temperature.It realizes to different rings
Under the conditions of the temperature change of border, the test of cable termination leakage current.
A kind of cable termination leakage current testing method under the conditions of particular surroundings temperature, includes the following steps, 1) it connects
Low-temperature test chamber (14) and DC power supply (1) are cooled down or are heated up to test lubricating cup (15)；
2) start gas flow control system (4), accelerate pilot system internal convection speed, realize the quick variation of temperature；
3) temperature controller (2) are opened, required high-temperature temperature and cryogenic temperature and high temperature and low temperature alternating is set
The frequency and high-temperature duration of progress, low temperature continuous time；
4) after carrying out high and low temperature alternative processing to cable termination (19), call through test transformer (7), to cable termination (19)
Apply high pressure activation；
5) it is detected under the conditions of particular surroundings temperature using the leakage current tester (6) of peripheral hardware, cable termination (19)
Leakage current.
Fig. 1 is experimental system general structure schematic diagram of the present invention.As can be seen from the figure a kind of vehicle-mounted cable termination is in spy
Leakage current testing system under different environment temperature includes low temperature environment simulation system, hot environment simulation system, and temperature is integrated
Control system and leakage current testing system.Low temperature environment simulation system is mainly by temperature controller (2), No. nine sensors
(33), No. ten sensors (34), ride on Bus No. 11 sensor (35), ten No. two sensors (36), air vent (22), exhaust pipe (20),
Scavenger pump (5) low-temperature test chamber (14) is constituted；Hot environment simulation system mainly by test lubricating cup (15), cable termination (19),
Insulating oil (17), resistance wire (16), (24) No. two sensors (25) of No.1 sensor, No. three sensors (26), No. four sensors
(27), No. five sensors (28), No. six sensors (29), No. seven sensors (30), No. eight sensors (31), DC power supply (1),
Temperature controller (2) is constituted；Temperature integrated control system include: PC machine (3), temperature controller (2), No.1 sensor (24),
No. two sensors (25), No. three sensors (26), No. four sensors (27), No. five sensors (28), No. six sensors (29), seven
Number sensor (30), No. eight sensors (31), No. nine sensors (33), No. ten sensors (34), ride on Bus No. 11 sensor (35), ten
No. two sensors (36) and its connection optical fiber, DC power supply (1), resistance wire (16) constitute leakage current testing system mainly by trying
It tests transformer (7), leakage current tester (6) is constituted.
It is 600mm, lower bracket (21) vertical height 200mm that Fig. 2, which tests lubricating cup (15) external height, is tested lubricating cup (15)
For bilayer, lubricating cup internal layer diameter is 300mm, and outer layer diameter is 340mm, wherein interlayer 20mm, and resistance wire (16) width is 10mm,
Plexiglass cover (32) thickness 10mm, wherein plexiglass cover (32) upper opening width is 56mm.
It should also be noted that, the expression of the extraction of part conducting wire uses simplified table in the scheme that attached drawing 1 is expressed
It reaches, but this should not influence understanding of the reader to practical connection type.It is clear that there is suitable precision in other experimental facilities
Under conditions of, optical fiber substitution can be used for transmitting the conducting wire of signal in the present invention program implementation.
Claims (3)
1. leakage current testing system of a kind of vehicle-mounted cable termination at a temperature of particular surroundings, for realizing exceptional operating conditions
Cable termination leakage current experiment under temperature field, which is characterized in that mainly by high-temperature heating simulation system, low temperature environment simulation
System, temperature control system, gas flow control system and leakage current testing system composition；High-temperature heating simulation system is placed in low temperature
In the cavity of environmental simulation system, temperature control system and leakage current testing system are placed in the cavity of low temperature environment simulation system
Outside, specific composition are as follows:
It is heated at high temperature simulation system to constitute are as follows: test lubricating cup (15) is supported in low-temperature test chamber (14) by bracket (21)；Examination
It tests lubricating cup (15) and is divided into outer wall and inner wall, inner wall (23) is thermal insulation layer, and resistance wire (16) is arranged in test lubricating cup (15) cup
In wall interlayer, two Leie of sensor components with eight sensors is attached to test lubricating cup (15) inner wall, in inner wall depth direction
Equidistant arrangement；Plexiglass cover (32) seals rim of a cup and remains in advance by being tested leading to for cable termination (19) and electrical wire
Hole；The electrical wire includes with the resistance wire (16) and sensor group that are tested in lubricating cup and external dc power (1), temperature
The electrical wire of controller (2) connection；
The low temperature environment simulation system has low-temperature test chamber (14), is provided with air vent (22) at the top of low-temperature test chamber (14)
With exhaust pipe (20), exhaust pipe (20) is communicated with outer gas stream regulating system (4)；Four sensors are placed in low-temperature test two-by-two
Case internal upper part and lower part；It is logical to accommodate tested cable termination and electrical wire to be reserved with respective through hole at the top of low-temperature test chamber (14)
It crosses；
The temperature controller (2) of the temperature control system is connect with each sensor；DC power supply (1) is distinguished by conducting wire
It is connected with resistance wire (16) and temperature controller (2)；PC machine (3) is connected with temperature controller (2), and according to each sensor and temperature
The data of degree controller (2) acquisition process control gas flow control system (4)；
Mainly by testing transformer (7), leakage current tester (6) is constituted the leakage current testing system, wherein test becomes
Depressor (7) is connected by conducting wire with anti-corona cover (8), and anti-corona cover (8) connects cable core conductor, and leakage current tester (6) passes through
Ground line (13) is connected with cable shield (12), and then forms test loop；
Voltage drive is applied to cable termination (19) when test, record applies the leakage current after different voltages excitation at each temperature
The data of tester (6) realize the test to cable termination leakage current under the conditions of varying environment temperature change.
2. the cable termination leakage current experimental system under the conditions of a kind of particular surroundings temperature according to claim 1,
Be characterized in that: test lubricating cup (15) external height is 600mm, lower bracket (21) vertical height 200mm, and test lubricating cup (15) is
Bilayer, lubricating cup internal layer diameter are 300mm, and outer layer diameter is 340mm, and wherein interlayer 20mm, resistance wire (16) width are 10mm, are had
Machine glass cover (32) thickness 10mm, wherein plexiglass cover (32) upper opening width is 56mm.
3. using the cable termination leakage current experiment under the conditions of the particular surroundings temperature of experimental system as claimed in claim 1 or 2
Method, which comprises the following steps:
1) cable termination (19) enters test lubricating cup (15) by plexiglass cover (32), and insulating oil (17) is totally submerged insulated umbrella
Skirt (18) connects low-temperature test chamber (14) and DC power supply (1), and test lubricating cup (15) is cooled down or heated up；
2) start gas flow control system (4), accelerate pilot system internal convection speed, realize the quick variation of temperature；
3) temperature controller (2) are opened, required high-temperature temperature and cryogenic temperature and high temperature and low temperature is set alternately
Frequency and high-temperature duration, low temperature continuous time；
4) after carrying out high and low temperature alternative processing to cable termination (19), call through test transformer (7) applies cable termination (19)
High pressure activation；
5) leakage of cable termination (19) under the conditions of particular surroundings temperature is detected using the leakage current tester (6) of peripheral hardware
Electric current.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710394354.2A CN107192918B (en) | 2017-05-29 | 2017-05-29 | Leakage current testing System and method for of vehicle-mounted cable termination at a temperature of particular surroundings |
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| CN201710394354.2A CN107192918B (en) | 2017-05-29 | 2017-05-29 | Leakage current testing System and method for of vehicle-mounted cable termination at a temperature of particular surroundings |
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| CN107192918B true CN107192918B (en) | 2019-07-12 |
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| CN109269554A (en) * | 2018-08-17 | 2019-01-25 | 广西昌用电线电缆有限公司 | A kind of heat detecting device irradiating low-smoke halogen-free cable |
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| CN111025094A (en) * | 2019-11-19 | 2020-04-17 | 云南电网有限责任公司临沧供电局 | XLPE cable reliability evaluation method based on leakage current change coefficient |
| CN112964311A (en) * | 2021-04-19 | 2021-06-15 | 天津福尔欣汽车线缆有限公司 | Test device for testing current-carrying capacity of automobile cable and maximum conductor temperature rise during overload |
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