CN204855711U - Cable condition assessment test platform - Google Patents
Cable condition assessment test platform Download PDFInfo
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- CN204855711U CN204855711U CN201520603140.8U CN201520603140U CN204855711U CN 204855711 U CN204855711 U CN 204855711U CN 201520603140 U CN201520603140 U CN 201520603140U CN 204855711 U CN204855711 U CN 204855711U
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Abstract
The utility model provides a cable condition assessment test platform, includes water environmental control unit, rises stream device, pressure device and temperature monitoring device, the test cable is placed among the water environmental control unit, the test cable with rise to flow the device form electromagnetic coupling and by rise and flow the device control the electric current of test cable, pressure device connects the test cable, temperature -detecting device connects the point for measuring temperature of test cable. This cable condition assessment test platform can make the test cable be in when carrying out the experiment of cable condition assessment and test under the environment state that is similar with real scene actual conditions, makes the test cable when carrying out the experiment of cable condition assessment, and gained test result more is close to actual conditions, has certain reliability and authenticity.
Description
Technical field
The utility model relates to cable quality evaluation areas, particularly relates to a kind of cable status evaluation test platform.
Background technology
In order to save maintenance cost unnecessary in a large number, reduce owing to repeatedly overhauling the artificial damage caused, Elongated cable wire road serviceable life, subtract reduced-maintenance power off time, effective grasp circuit running status, improve cable line power supply reliability, running status service technique has become the direction that power supply enterprise's maintenance mode changes and develops.
The running status maintenance of cable refers to the maintenance implementing cable according to the degradation of cable status.Carry out on-line monitoring and regular visit result according to cable line state, the judgment criteria of comparison cable running status quality, judge whether the change of current cable status parameter exceeds standard, and then determine whether to overhaul this cable line.Wherein, the state parameter of cable comprises the data of state of whole, part or its a certain function, performance or the parameter that can represent cable line, chart and curve.
The Cable Insulation Diagnosis Technology of existing power supply enterprise's application can be roughly divided into the diagnostic techniques based on non-electric quantity and the diagnostic techniques based on electric parameters.For the power cable line of all insulation structure, the diagnostic techniques based on non-electric quantity mainly contains infrared measurement of temperature method and optical fiber temperature-measurement method.The electric parameters detected based on the diagnostic techniques of electric parameters mainly contains insulation resistance, dielectric loss angle tangent (tan δ) and shelf depreciation.
Mode and the cable practical operation situation of current these parameters of acquisition have larger difference, and therefore, its parameter obtained can not reflect cable practical operation situation comparatively truly, are and lack certain reliability and authenticity.
Utility model content
Based on this, be necessary to provide a kind of cable status evaluation test platform with certain reliability and authenticity.
A kind of cable status evaluation test platform, comprises water environment regulating device, up-flow device, pressue device and device for detecting temperature;
Test cable is placed in described water environment regulating device; Described test cable and described up-flow device form electromagnetic coupled and are controlled the electric current of described test cable by described up-flow device; Described pressue device connects described test cable; Described temperature-detecting device connects the point for measuring temperature of described test cable.
This cable status evaluation test platform, test under test cable can be made when carrying out cable status evaluation test to be in the ambient condition close with reality scene actual conditions, make test cable when carrying out cable status evaluation test, the test findings obtained, closer to actual conditions, has certain reliability and authenticity.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of cable status evaluation test platform of embodiment;
Fig. 2 is the wiring diagram of the pressue device of Fig. 1;
Fig. 3 is the guidance panel figure of the pressurization pressure regulator of Fig. 2;
Fig. 4 is the structural drawing of the steel structure frame of the tank of Fig. 1;
Fig. 5 is the process flow diagram adopting the cable status evaluation test platform of Fig. 1 to carry out constant voltage duty cycle aging test.
Embodiment
For the ease of understanding the utility model, below with reference to relevant drawings, the utility model is described more fully.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present utility model more comprehensively thorough.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in instructions of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.Term as used herein " or/and " comprise arbitrary and all combinations of one or more relevant Listed Items.
As shown in Figure 1, a kind of cable status evaluation test platform, comprises water environment regulating device 110, up-flow device 130, pressue device 150 and device for detecting temperature 170.
Test cable 200 is placed in described water environment regulating device 110; Described test cable 200 forms electromagnetic coupled with described up-flow device 130 and is controlled the electric current of described test cable 200 by described up-flow device 130; Described pressue device 150 connects described test cable 200; Described temperature-detecting device 170 connects the point for measuring temperature of described test cable 200.
When carrying out cable status evaluation test, when especially carrying out 10kV crosslinked cable constant voltage duty cycle aging test, two no-go subs of test cable 200 are interconnected to form test cable loop, up-flow device 130 provides lasting big current for test cable loop, makes the core of test cable 200 reach test temperature close to reality scene actual conditions.Pressue device 150 provides the high voltage of continuous print power frequency over the ground for test cable 200, makes test cable 200 insulation bear the electric field action of the high strength close to reality scene actual conditions.Temperature-detecting device 170 gathers and records the temperature information of the point for measuring temperature of test cable 200, to guarantee the temperature close of test temperature and reality scene actual conditions.Water environment regulating device 110 provides the water environment of simulating reality scene for test cable 200.
So, test under test cable 200 can be made when carrying out cable status evaluation test to be in the ambient condition close with reality scene actual conditions, make test cable 200 when carrying out cable status evaluation test, the test findings obtained, closer to actual conditions, has certain reliability and authenticity.
Wherein in an embodiment, described point for measuring temperature comprises any one location point in no-go sub place, intermediate head place and body oversheath place or several location point.The quantity of suitable point for measuring temperature and the determination of position, can make device for detecting temperature 170 gather and the temperature information recorded is more reliable.
Wherein in an embodiment, described up-flow device 130 comprises the control desk 131, up-flow pressure regulator 133 and the up-flow coil 135 that are connected successively by signal cable, control desk 131 connects described up-flow pressure regulator 133, and described up-flow coil 135 connects described up-flow pressure regulator 133; Described test cable 200 passes described up-flow coil 135 to form electromagnetic coupled with described up-flow coil 133.In the present embodiment, described up-flow pressure regulator 133 is equipped with one to one with described up-flow coil 135, and described up-flow pressure regulator 133 is all set to 3 with described up-flow coil 135, is respectively up-flow pressure regulator A, up-flow pressure regulator B, up-flow pressure regulator C and the A phase up-flow coil be equipped with, B phase up-flow coil, C phase up-flow coil.
Control desk 131 can use existing mode to monitor the voltage signal of up-flow pressure regulator A, up-flow pressure regulator B, up-flow pressure regulator C respectively, comprises supply voltage, frequency, power factor, active power, reactive power and accumulated consumption power.Can receive and show the current signal in A, B, C three-phase up-flow coil received respectively by up-flow pressure regulator A, up-flow pressure regulator B, up-flow pressure regulator C simultaneously, in the present embodiment, the current signal in A, B, C three-phase up-flow coil is the current value of test cable 200.Control desk 131 can also adopt existing mode to carry out closing operation respectively to up-flow pressure regulator A, up-flow pressure regulator B, up-flow pressure regulator C; When up-flow pressure regulator A, up-flow pressure regulator B, up-flow pressure regulator C close a floodgate simultaneously, boosting and the reduced pressure operation of voltage can be carried out separately to up-flow pressure regulator A, up-flow pressure regulator B or up-flow pressure regulator C.Control desk 131 also can arrange the voltage high prompting of up-flow pressure regulator 133, device failure alert, up-flow pressure regulator 133 voltage self-zeroing and the in emergency circumstances anxious function such as to stop according to existing mode.The internal logic circuit of control desk 131 can be realized by existing relay, adjustable with the current continuity in the test cable loop of the continuously adjustabe and access up-flow coil 135 that ensure up-flow pressure regulator 133 output voltage.
Wherein in an embodiment, described up-flow pressure regulator 133 is single-phase pillar high-potting pressure regulator.Up-flow pressure regulator 133 adopts the type of cooling of oil, rated capacity 50kVA, and nominal input voltage is 380V.Wherein, up-flow pressure regulator A can connect A phase and the B phase of input power, and up-flow pressure regulator B connects B phase and the C phase of input power, and up-flow pressure regulator C connects C phase and the A phase of input power.Up-flow pressure regulator 133 output voltage range is 0 to 440V.Up-flow pressure regulator 133 can adopt existing mode to arrange voltage high setting valve, is specially 380V, when up-flow pressure regulator 133 output voltage is higher than voltage high setting valve, sends warning message to control desk 131.Control desk 131 according to warning message, can light full level alarm lamp.Up-flow pressure regulator 133 is also provided with the voltage protector realized by existing manner; when up-flow pressure regulator 133 output voltage is higher than voltage high setting valve and when continuing to increase to over power input voltage; the voltage protector of up-flow pressure regulator 133 starts, and makes output voltage auto zero.
Wherein in an embodiment, the feeder number of the test cable 200 of the input side of up-flow coil 135 and the no-load voltage ratio of outgoing side to be 50:n, n be this up-flow coil 135 of access in up-flow device 130.When having and only have a test cable loop access up-flow coil, the no-load voltage ratio of input side and outgoing side is 50:1.The input voltage range of up-flow coil 135 is 0 to 400V, maximum input current is 125A, the electromotive force amplitude range then responding to generation in test cable loop is 0 to 8V, and the theoretical current maximal value in the test cable loop when disregarding test cable loop induction reactance is 6250A.
Wherein in an embodiment, the base of up-flow coil 135 is provided with roller, moves to facilitate up-flow coil 135.
Wherein in an embodiment, described pressue device 150 comprises interconnective pressurization pressure regulator 151 and transformer 153; Described transformer 153 connects a no-go sub of described test cable 200.In the present embodiment, described pressurization pressure regulator 151 is box pressure regulator, and described transformer 153 is single phase industrial frequence testing transformer.So, for test cable 200 provides the high voltage of continuous print power frequency over the ground, test cable 200 insulation is made to bear the electric field action of the high strength close to reality scene actual conditions, more truly, reliably to examine the insulating property of cable.
Particularly, the wiring diagram of pressue device 150 as shown in Figure 2.The AX terminal access 50Hz AC power of pressurization pressure regulator 151, the pressurization outgoing side of pressure regulator 151 is connected with the ax input terminal of transformer 153, the instrument terminals of pressurization pressure regulator 151 is connected with the EF terminal of transformer 153 respectively, and the high-voltage terminal end A of transformer 15 is connected with test cable 200 core.The pressurization PE terminal of pressure regulator 151, the instrument F terminal of transformer 153 are connected ground wire with the sub-X of high pressure tail end.
Wherein in an embodiment, the model of pressurization pressure regulator 151 is XCJH-5, and nominal input voltage 220V, output voltage range 0 to 200V, rated current 25A, class of insulation A level, has measurement function, overcurrent protection and function clocking capability.The guidance panel of pressurization pressure regulator 151 as shown in Figure 3.Wherein, 1 adjust for timing; 2 is low-tension current; 3 is high tension voltage; 4 is ground connection; 5 is instrument; 6 for exporting; 7 is power supply input; 8 adjust for overcurrent protection; 9 is power supply instruction; 10 is power transmission instruction; 11 is zero-bit instruction; 12 is sound and light alarm; 13 is current ratio/excision; 14 is Drazin inverse; 15 is timing button; 16 is stop button; 17 is start button.
Wherein in an embodiment, the model of transformer 153 is YDQ-10kVA, and insulating medium is SF6 gas, rated capacity is 10kVA, and low-pressure side rated voltage is 200V, and rated current is 50A, high-pressure side rated voltage is 50kV, and rated current is 200mA, and no-load voltage ratio is 250:1.Transformer 153 should measure its winding insulation resistance before use, can normally use when its resistance is not less than 0.5M Ω, and meanwhile, transformer internal gas pressure should be not less than 0.2MPa, otherwise should inflate in time.
Table 1 pressue device operating condition
Following three kinds of operating modes are mainly contained for pressue device 150, as shown in table 1.When carrying out long-term withstand voltage test, should carry out for three times in operating mode, pressurization pressure regulator 151 and transformer 153 all should meet the electric current and voltage requirement of operating mode three, namely use capacity to be no more than 1/3rd of rated capacity, to guarantee device security continuous working.
Wherein in an embodiment, described device for detecting temperature 170 comprises temperature sensor 171 and registering instrument 173; Described temperature sensor 171 is arranged on described point for measuring temperature place, gathers the temperature information at described point for measuring temperature place, and described temperature information is sent to described registering instrument 173.So, can to test cable 200 carry out temperature point survey, monitor, non-volatile recording.
Wherein in an embodiment, the model of registering instrument 173 is TP-700, and manufacturer is Tuo Purui Electronics Co., Ltd. of Shenzhen.Registering instrument 173 is the mainboard of core, primary power, outer for formations such as transmitter power supply, intelligent channel plate, high-capacity FLASHs primarily of touch liquid crystal screen, button, ARM microprocessor.
ARM microprocessor can realize the collection of maximum 64 road signals, record, display and warning.The built-in 70MB high-capacity FLASH of registering instrument 173, so, prestissimo can reach the data of 1 record in second once all passages, by USB flash disk fast by the data conversion storage in FLASH in computing machine, and there is disconnected power-down protection.Touch liquid crystal screen is 7 cun of colored TFT touch-control LCD, can show digital picture, bar graph picture, real-time curve picture and history curve picture, digital display range-999.99 ~ 1999.99.Measurement, the display fundamental error of registering instrument 173 are ± 0.2%FS.Registering instrument 173 can adopt existing mode each point for measuring temperature to be arranged respectively to one or more alarming values in lower limit, lower limit, the upper limit, the upper limit, contrasts the relation between the temperature information collected and alarming value to facilitate user.
Temperature sensor 171 can be that thermal resistance is or/and thermopair.Wherein thermal resistance can be Pt100 and Cu50, thermopair can be in the types such as K, S, R, B, N, E, J, T any one or multiple.In the present embodiment, for realizing remote temperature measurement and the monitoring of cable multiple spot, select Pt100 thermal resistance and K type thermopair as temperature sensor 171, and be furnished with the long shielded lead-in wire of band of 5m.
Wherein in an embodiment, described water environment regulating device 110 comprises tank 111 and the water pump 113 for described tank 111 water supply; Described test cable 200 is placed in described tank 111.
Tank 111 comprises steel structure frame, insulating mat and impermeable film, and insulating mat and impermeable film are fitted, and is arranged at bottom surface and the side of steel structure frame, forms a Baltimore groove.In the present embodiment, insulating mat is the silicone rubber pad that 5mm is thick, and impermeable film is the plastic sheeting that 1mm is thick.For meeting the testing requirements of different length test cable 200, different brackets test cable 200, the steel structure frame of tank 111 is designed to the detachable unitized construction of multiple same size module composition, individual module is made up of the square steel disc of four block lengths, and intermodule is connected by brace.The structure of the steel structure frame of tank 111 as shown in Figure 4.In figure, the structure of the steel structure frame of tank 111 is long 3m, wide 0.5m, high 0.25m, so, can meet test cable 200 has about 1m length to be all immersed in water, also can according to the requirement of partial-length in test cable 200 immersion water during test, the length of increase and decrease tank 111 and width.
Cable status evaluation test platform of the present utility model, is applicable to constant voltage duty cycle aging test.When carrying out constant voltage duty cycle aging test by this cable status evaluation test platform, by the constant voltage that pressue device 150 applies higher than rating operating voltage to test cable 200, and in the core of test cable 200, apply larger short-circuit current by up-flow device 130, load condition during dummycable reality scene actual motion, test cable 200 is made to be issued to higher than nominal operating temperature 5 DEG C to 10 DEG C in hot stable state by Joule effect, certain water environment conditions is set by water environment regulating device 110 simultaneously, carry out the Changing Pattern of the running status of comprehensive certification test cable 200, whether the insulating property of evaluation test cable 200 and annex thereof can meet the requirement of the test condition more more harsh than actual motion condition.Its experiment process as shown in Figure 5.
Due to, this cable status evaluation test platform is tested under test cable 200 can be made when carrying out cable status evaluation test to be in the ambient condition close with reality scene actual conditions, make test cable 200 when carrying out cable status evaluation test, the test findings obtained, closer to actual conditions, has certain reliability and authenticity.
Above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make multiple distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. a cable status evaluation test platform, is characterized in that, comprises water environment regulating device, up-flow device, pressue device and device for detecting temperature;
Test cable is placed in described water environment regulating device; Described test cable and described up-flow device form electromagnetic coupled and are controlled the electric current of described test cable by described up-flow device; Described pressue device connects described test cable; Described temperature-detecting device connects the point for measuring temperature of described test cable.
2. cable status evaluation test platform according to claim 1, is characterized in that, described point for measuring temperature comprises any one location point in no-go sub place, intermediate head place and body oversheath place or several location point.
3. cable status evaluation test platform according to claim 1, it is characterized in that, described up-flow device comprises the control desk, up-flow pressure regulator and the up-flow coil that are connected successively by signal cable, and control desk connects described up-flow pressure regulator, and described up-flow coil connects described up-flow pressure regulator; Described test cable passes described up-flow coil to form electromagnetic coupled with described up-flow coil.
4. cable status evaluation test platform according to claim 3, is characterized in that, described up-flow pressure regulator and described up-flow coil are equipped with one to one, and described up-flow pressure regulator and described up-flow coil are all set to 3.
5. the cable status evaluation test platform according to claim 3 or 4, is characterized in that, the base of described up-flow coil is provided with roller.
6. cable status evaluation test platform according to claim 3, is characterized in that, described up-flow pressure regulator is single-phase pillar high-potting pressure regulator.
7. cable status evaluation test platform according to claim 1, is characterized in that, described pressue device comprises interconnective pressurization pressure regulator and transformer; Described transformer connects a no-go sub of described test cable.
8. cable status evaluation test platform according to claim 7, is characterized in that, described pressurization pressure regulator is box pressure regulator, and described transformer is single phase industrial frequence testing transformer.
9. cable status evaluation test platform according to claim 1, it is characterized in that, described device for detecting temperature comprises temperature sensor and registering instrument; Described temperature sensor is arranged on described point for measuring temperature place, gathers the temperature information at described point for measuring temperature place, and described temperature information is sent to described registering instrument.
10. cable status evaluation test platform according to claim 1, is characterized in that, described water environment regulating device comprises tank and the water pump for described tank water supply; Described test cable is placed in described tank.
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|---|---|---|---|
| CN201520603140.8U CN204855711U (en) | 2015-08-11 | 2015-08-11 | Cable condition assessment test platform |
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| CN201520603140.8U CN204855711U (en) | 2015-08-11 | 2015-08-11 | Cable condition assessment test platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001571A (en) * | 2018-07-19 | 2018-12-14 | 深圳宜特检测技术有限公司 | A kind of strengthening electric current power method and device for ageing management machine |
| CN110595989A (en) * | 2019-08-30 | 2019-12-20 | 国网福建省电力有限公司电力科学研究院 | Cable damage test platform and method for manually simulating strong wind and coastal environment |
-
2015
- 2015-08-11 CN CN201520603140.8U patent/CN204855711U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001571A (en) * | 2018-07-19 | 2018-12-14 | 深圳宜特检测技术有限公司 | A kind of strengthening electric current power method and device for ageing management machine |
| CN110595989A (en) * | 2019-08-30 | 2019-12-20 | 国网福建省电力有限公司电力科学研究院 | Cable damage test platform and method for manually simulating strong wind and coastal environment |
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Effective date of registration: 20200930 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |