CN211554197U - Experimental platform for simulating damp state of cable terminal of urban distribution network - Google Patents
Experimental platform for simulating damp state of cable terminal of urban distribution network Download PDFInfo
- Publication number
- CN211554197U CN211554197U CN201922003330.7U CN201922003330U CN211554197U CN 211554197 U CN211554197 U CN 211554197U CN 201922003330 U CN201922003330 U CN 201922003330U CN 211554197 U CN211554197 U CN 211554197U
- Authority
- CN
- China
- Prior art keywords
- cable
- experimental
- terminal
- distribution network
- wire
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a simulation city distribution network cable terminal test platform that wets state. The experiment platform for simulating the damp state of the cable terminal of the urban distribution network can realize the simulation and implementation test of the damp phenomenon of the urban distribution network, and further judge the damp state, the service performance and the like of the cable terminal of the distribution network in an experiment. The beneficial effects of the utility model reside in that, can be high-efficient, accurate, real-time, conveniently carry out the simulation and the exploration of the phenomenon of weing to the cable that regional uses such as city cable pit, transformer substation, the breakdown problem that further research leads to because of weing realizes the reliable operation of distribution network.
Description
Technical Field
The utility model relates to a city distribution network cable simulation experiment field, especially a simulation city distribution network cable terminal test platform that wets state.
Background
In an urban distribution network, a cable terminal runs in environments such as a cable trench with serious accumulated water for a long time, the water inlet phenomenon at the cable terminal is very serious, the damp degree of the cable terminal directly influences the insulation performance of the cable terminal, the running state of the cable terminal is unbalanced, and the capacity of resisting the invasion of moisture, humidity and the like in the external environment of the cable is obviously different. With the extension of the operating life of the cable, the damp phenomenon becomes more and more serious, and the safe and reliable operation of the power distribution network is seriously influenced, so that the cable needs to be monitored in a key way.
At present, in the research aiming at the cable terminal damping phenomenon, detection methods such as leakage current and insulation resistance are mostly used for detecting the damping state of the cable terminal of the power distribution network, but the detection effects of the methods are not ideal, misdiagnosis is often caused, and the current deficient professional experiment exploration platform is provided. Therefore, in order to further research the problem of the moisture of the power distribution network cable terminal and further provide a new method capable of improving the detection efficiency and accuracy, an experimental platform for the moisture state of the power distribution network cable terminal needs to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simulation city distribution network cable terminal test platform that wets state can realize city distribution network and wet the simulation of phenomenon and implement the test, and then judges distribution network cable terminal's in the experiment state of wetting and service performance etc. can improve detection efficiency and accuracy.
Realize the utility model discloses the technical scheme of purpose as follows:
an experiment platform for simulating a damp state of a cable terminal of an urban distribution network comprises the following parts: the system comprises an experiment cable body, a water collector, a collecting pipeline, an epoxy resin type experiment box, a water pressure booster, a booster control cable, an input pipeline, a fastening screw, a water input device, a control and acquisition computer, an experiment cable core, a first resistance wire, a second resistance wire, a high-voltage connecting wire, a test data transmission line, a frequency domain dielectric spectrum tester, a low-voltage acquisition wire, a temperature control system, an experiment terminal umbrella skirt, an experiment terminal fixing flange, a third resistance wire, a fourth resistance wire, an experiment terminal grounding wire and a terminal umbrella skirt top; the high-voltage connecting wire is in good contact with the cable core of the experimental cable through a fastening screw and is connected with the high-voltage end of the frequency domain dielectric spectrum tester; the experimental terminal grounding wire is connected to the low-voltage end of the frequency domain dielectric spectrum tester through a low-voltage acquisition wire connected with the experimental terminal grounding wire, and the frequency domain dielectric spectrum tester transmits the test data to the control and acquisition computer through a test data transmission line; the first resistance wire, the second resistance wire, the third resistance wire and the fourth resistance wire are placed at the bottom of the epoxy resin type experiment box and are respectively connected to a temperature control system; the water input device is tightly hooped at the top of the terminal umbrella skirt and can be tightly wound by using an expansion adhesive tape and the like to prevent water leakage, and the water input device is connected with the hydraulic pressure booster through an input pipeline; the water collector is tightly hooped at the lower side of the experiment terminal fixing flange and can be tightly wound by using an expansion adhesive tape and the like to prevent water from seeping out, and the water collector is connected with the hydraulic pressure booster through a collecting pipeline; the control and acquisition computer can send out instructions to the water pressure booster and respectively control the water collector and the water input device which are connected with the control and acquisition computer through data detected by the frequency domain dielectric spectrum tester in real time.
The frequency domain dielectric spectrum tester can detect the moisture degree of the experimental cable terminal in real time, the insulation condition of the experimental cable terminal can be judged according to the processing of detection data, the moisture state of the cable terminal is further judged, and the moisture state can be displayed and processed through the control and acquisition computer.
The beneficial effects of the utility model reside in that:
the method can efficiently, accurately, real-timely and conveniently simulate and explore the damp phenomenon of cables used in urban cable ditches, transformer substations and other areas, further research the breakdown problem caused by the damp, and realize the reliable operation of the power distribution network.
Drawings
Fig. 1 is the utility model discloses a simulation urban distribution network cable terminal experimental platform structure schematic diagram of the state of weing.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is the utility model discloses a test connection schematic diagram of the experiment platform of simulation urban distribution network cable termination state of weing for realize that urban distribution network wets the simulation of phenomenon and implement the purpose of test, its test connection relation includes following content with the use mode:
the first step is as follows: construction of an experiment platform
1. The utility model provides an experimental platform of simulation urban distribution network cable terminal state of weing which characterized in that includes following part: the experimental cable comprises an experimental cable body 1, a moisture collector 2, a collecting pipeline 3, an epoxy resin type experimental box 4, a hydraulic pressure booster 5, a booster control cable 6, an input pipeline 7, a fastening screw 8, a moisture input device 9, a control and acquisition computer 10, an experimental cable core 11, a first resistance wire 12, a second resistance wire 13, a high-voltage connecting wire 14, a test data transmission line 15, a frequency domain dielectric spectrum tester 16, a low-voltage acquisition wire 17, a temperature control system 18, an experimental terminal umbrella skirt 19, an experimental terminal fixing flange 20, a third resistance wire 21, a fourth resistance wire 22, an experimental terminal grounding wire 23 and a terminal umbrella skirt top 24; the high-voltage connecting wire 14 is in good contact with the experimental cable core 11 through a fastening screw 8 and is connected with the high-voltage end of the frequency domain dielectric spectrum tester 16; the experiment terminal grounding wire 23 is connected to the low-voltage end of the frequency domain dielectric spectrum tester 16 through the low-voltage acquisition wire 17 connected with the experiment terminal grounding wire, and the frequency domain dielectric spectrum tester 16 transmits the test data to the control and acquisition computer 10 through the test data transmission wire 15; the first resistance wire 12, the second resistance wire 13, the third resistance wire 21 and the fourth resistance wire 22 are placed at the bottom of the epoxy resin type experiment box 4 and are respectively connected to the temperature control system 18; the moisture input device 9 is tightly hooped on the top 24 of the terminal umbrella skirt and can be tightly wound by using an expansion adhesive tape and the like to prevent moisture leakage, and the moisture input device 9 is connected with the hydraulic pressure booster 5 through the input pipeline 7; the water collector 2 is tightly hooped at the lower side of the experimental terminal fixing flange 20 and can be tightly wound by using an expansion adhesive tape and the like to prevent water from seeping out, and the water collector 2 is connected with the hydraulic pressure booster 5 through the collecting pipeline 3; the control and acquisition computer 10 can send instructions to the water pressure booster 5 through data detected in real time by the frequency domain dielectric spectrum tester 16, and respectively control the water collector 2 and the water input device 9 connected with the water pressure booster.
The frequency domain dielectric spectrum tester 16 (model number MEGGER IDAX 300/350) can detect the moisture degree of the experimental cable terminal in real time, and the insulation state of the experimental cable terminal can be judged according to the detection data and the processing, so that the moisture state of the cable terminal can be judged and displayed and processed by the control and acquisition computer 10.
The hydraulic booster 5 is WILO MHI403, the temperature control system 18 is LG-MD60, and the moisture collector 2 is customized as required by prior art methods.
The second step is that: carry out the test
Setting a test frequency point f of a frequency domain dielectric spectrum tester (16)kSequentially at 0.001Hz, 0.002Hz, 0.005Hz, 0.01Hz, 0.02Hz, 0.05Hz, 0.1Hz, 0.2Hz, 0.5Hz, 1Hz, 5Hz and 50Hz, and taking k as 1, 2After the domain dielectric spectrum tester (16) works, the corresponding real parts of complex dielectric constants can be respectively obtainedkAnd imaginary part of complex dielectric constantk″；
The third step: performing a functional analysis of the results of the dielectric test of the experimental cable
3.1 at frequency point f according to that obtained in the second step1～f12Real part of complex dielectric constant obtained by the testkAnd imaginary part of complex dielectric constantk"curve, to which the fitting of the expression function is performed, first the solution of the intermediate transformation parameters is performed, as follows:
wherein q isk(f) Representing an interpolation basis function, fitting an intermediate transformation parameter as a function of the dielectric test result, and continuing the following processing;
3.2 will be at frequency point f1～f12Real part of complex dielectric constant obtained by the testk' (i.e. that1′～12') are in one-to-one correspondence and are taken into solution (2):
′(f)＝q0(f)′0+q1(f)′1+...+qm(f)′m，m＝12 (2)
then, it will be at frequency point f1～f12Imaginary part of complex dielectric constant obtained by the process testk"(i.e., that is1″～12") are respectively in one-to-one correspondence and are put into solving the formula (3):
″(f)＝q0(f)′0+q1(f)′1+...+qm(f)′m，m＝12 (3)
3.3 obtaining a dielectric test function, a real part function '-f and an imaginary part function' -f through the processing in the steps 3.1 and 3.2 respectively;
the fourth step: calculating the characteristic parameters of the experiment cable affected with damp
Respectively selecting 0.001 Hz-0.01 Hz and 0.02H according to the fitted dielectric test functions '-f and' -fz to 0.2Hz and 0.5Hz to 50Hz, which are respectively marked as S1、S2、S3And calculating the damping characteristic parameters of the experimental cable:
wherein s isA' for dielectric test of experimental cable real part characteristic parameter, sA"is the imaginary part characteristic parameter of the dielectric test of the experimental cable;
the fifth step: judging method of uneven damp state of power distribution network cable
Calculating a contrast value of the three-phase cable damping characteristic parameter in the following calculation mode:
the evaluation of the moisture state of the experimental cable and the judgment of the insulation state of the terminal can be realized by judging the J.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (4)
1. The utility model provides an experimental platform of simulation urban distribution network cable terminal state of weing which characterized in that includes following part: the experimental cable comprises an experimental cable body (1), a water collector (2), a collecting pipeline (3), an epoxy resin type experimental box (4), a water pressure booster (5), a booster control cable (6), an input pipeline (7), a fastening screw (8), a water input device (9), a control and acquisition computer (10), an experimental cable core (11), a first resistance wire (12), a second resistance wire (13), a high-voltage connecting wire (14), a test data transmission line (15), a frequency domain dielectric spectrum tester (16), a low-voltage acquisition wire (17), a temperature control system (18), an experimental terminal umbrella skirt (19), an experimental terminal fixing flange (20), a third resistance wire (21), a fourth resistance wire (22), an experimental terminal grounding wire (23) and a terminal umbrella skirt top (24); the high-voltage connecting wire (14) is in good contact with the experimental cable core (11) through a fastening screw (8) and is connected with the high-voltage end of the frequency domain dielectric spectrum tester (16); the experiment terminal grounding wire (23) is connected to the low-voltage end of the frequency domain dielectric spectrum tester (16) through a low-voltage acquisition wire (17) connected with the experiment terminal grounding wire, and the frequency domain dielectric spectrum tester (16) transmits test data to the control and acquisition computer (10) through a test data transmission line (15); the first resistance wire (12), the second resistance wire (13), the third resistance wire (21) and the fourth resistance wire (22) are placed at the bottom of the epoxy resin type experiment box (4) and are respectively connected to a temperature control system (18); the moisture input device (9) is tightly hooped on the top (24) of the terminal umbrella skirt and can be tightly wound by using an expansion adhesive tape and the like to prevent moisture leakage, and the moisture input device (9) is connected with the hydraulic pressure booster (5) through the input pipeline (7); the water collector (2) is tightly hooped at the lower side of the experimental terminal fixing flange (20) and can be tightly wound by using an expansion adhesive tape and the like to prevent water from seeping, and the water collector (2) is connected with the hydraulic pressure booster (5) through the collecting pipeline (3); the control and acquisition computer (10) can send out instructions to the water pressure booster (5) through data detected by the frequency domain dielectric spectrum tester (16) in real time, and respectively control the water collector (2) and the water input device (9) which are connected with the control and acquisition computer.
2. The experiment platform for simulating the cable terminal moisture state of the urban distribution network according to claim 1, wherein the frequency domain dielectric spectrum tester (16) detects the moisture degree of the experiment cable terminal in real time, the insulation condition of the experiment cable terminal is judged according to the detection data and the processing, and then the moisture state of the cable terminal is judged and displayed and processed by the control and acquisition computer (10).
3. The experimental platform for simulating the cable terminal damp state of the urban distribution network according to claim 1, characterized in that the hydraulic booster (5) is a WILO MHI 403.
4. The experimental platform for simulating the cable termination damp state of the urban distribution network according to claim 1, characterized in that the temperature control system (18) is LG-MD 60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922003330.7U CN211554197U (en) | 2019-11-19 | 2019-11-19 | Experimental platform for simulating damp state of cable terminal of urban distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922003330.7U CN211554197U (en) | 2019-11-19 | 2019-11-19 | Experimental platform for simulating damp state of cable terminal of urban distribution network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211554197U true CN211554197U (en) | 2020-09-22 |
Family
ID=72501849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922003330.7U Active CN211554197U (en) | 2019-11-19 | 2019-11-19 | Experimental platform for simulating damp state of cable terminal of urban distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211554197U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115113005A (en) * | 2022-06-13 | 2022-09-27 | 中交机电工程局有限公司 | Simulation test method and device for cable terminal dust deposition and flashover caused by damp |
-
2019
- 2019-11-19 CN CN201922003330.7U patent/CN211554197U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115113005A (en) * | 2022-06-13 | 2022-09-27 | 中交机电工程局有限公司 | Simulation test method and device for cable terminal dust deposition and flashover caused by damp |
| CN115113005B (en) * | 2022-06-13 | 2023-08-22 | 中交机电工程局有限公司 | Simulation test method and device for cable terminal dust accumulation and damp flashover |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2014173314A1 (en) | System for testing property of thunder and lightning traveling wave of power transmission line | |
| CN103401238B (en) | A kind of power load modelling approach based on Measurement-based approach | |
| CN100592441C (en) | Electron type current transformer for ultrahigh voltage transmission lines and corona loss measurement device thereof | |
| CN106066437B (en) | A kind of on-line monitoring device of metallic oxide arrester and its monitoring method | |
| CN203299270U (en) | Device for accurately measuring CVT grid-side voltage harmonic wave | |
| CN107886171A (en) | A kind of circuit-breaker status inline diagnosis method and system based on PMU data | |
| CN103954894A (en) | Partial discharge locating method for three-phase crossed and interconnected cables | |
| CN202025054U (en) | Portable creepage current electrified detecting system for support insulator | |
| CN107817402A (en) | Direct current transmission line fault direction recognizing method based on measurement wave impedance | |
| CN211554197U (en) | Experimental platform for simulating damp state of cable terminal of urban distribution network | |
| CN110907855A (en) | Distribution network line fault detection method based on comprehensive distribution box and high-voltage sensor | |
| CN105486984B (en) | A kind of direct current grounding trouble shooting method and instrument based on the control of dynamic electric potential source | |
| CN113466607B (en) | Method for analyzing damping state of three-phase cable intermediate joint | |
| CN105353236B (en) | The online remote detecting method of disk insulator state and device | |
| CN110658432B (en) | Method for evaluating moisture degree of cable terminal of power distribution network | |
| CN108318732B (en) | On-line monitoring device and method for grounding current of transformer core | |
| CN212007767U (en) | Power transformer mechanical state detection system | |
| CN111025091B (en) | Intelligent evaluation method for uneven damp state of urban distribution network cable | |
| CN201226292Y (en) | Electron type current transformer for ultrahigh voltage transmission line and apparatus for measuring corona loss thereof | |
| CN211554196U (en) | Detection and repair device for uneven damp state of XLPE cable terminal | |
| CN207964994U (en) | Grounding net of transformer substation health status detection device | |
| Cabral et al. | Comparative performance of impulsive grounding systems embedded in concrete: An experiment in reduced scale | |
| CN104111438A (en) | Primary large-current loop monitoring method in current transformer error test | |
| CN112986858B (en) | Ground fault judging method based on zero sequence wavelet decomposition calculation | |
| CN110658431B (en) | Power cable terminal moisture invasion degree monitoring and evaluating method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |