CN112269016A - Oil-filled cable internal insulation oil dissolved gas diffusion simulation experiment device - Google Patents
Oil-filled cable internal insulation oil dissolved gas diffusion simulation experiment device Download PDFInfo
- Publication number
- CN112269016A CN112269016A CN202011086038.7A CN202011086038A CN112269016A CN 112269016 A CN112269016 A CN 112269016A CN 202011086038 A CN202011086038 A CN 202011086038A CN 112269016 A CN112269016 A CN 112269016A
- Authority
- CN
- China
- Prior art keywords
- oil
- flange
- terminal
- insulating
- connecting sleeve
- 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.)
- Granted
Links
- 238000004088 simulation Methods 0.000 title claims abstract description 76
- 238000009792 diffusion process Methods 0.000 title claims abstract description 23
- 238000009421 internal insulation Methods 0.000 title description 2
- 238000002347 injection Methods 0.000 claims abstract description 40
- 239000007924 injection Substances 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002655 kraft paper Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 12
- 238000004458 analytical method Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 28
- 239000007789 gas Substances 0.000 description 23
- 238000003745 diagnosis Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2805—Oils, i.e. hydrocarbon liquids investigating the resistance to heat or oxidation
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a simulation experiment device for diffusion of dissolved gas of insulating oil in an oil-filled cable, which comprises a cable simulator and an external test cavity, wherein the cable simulator is arranged in the external test cavity; the cable simulating body comprises an oil duct and an insulating layer; the oil duct is of a tubular structure, the insulating layer is wound outside the oil duct, and the oil duct is connected with a middle oil taking device in the outer test cavity through a middle opening of the insulating layer; the external test cavity comprises an outer cover, a connecting sleeve, a middle oil taking device, an oil injecting and taking terminal and a fault simulation terminal; the outer cover is of a tubular structure, and a middle opening is connected with the middle oil taking device; the connecting sleeve is of a tubular structure and is respectively sleeved at two ends of the oil duct, one end of the connecting sleeve is connected with the outer cover flange, and the other end of the connecting sleeve is connected with the oil injection and extraction terminal and the fault simulation terminal. The invention can simulate the electrical and thermal faults in the oil-filled cable oil duct and collect oil samples for analysis after the faults are finished, and can also directly inject insulating oil dissolved with single gas into the oil duct and analyze the insulating oil samples at different positions by collecting the insulating oil samples.
Description
Technical Field
The invention relates to the technical field of self-contained oil-filled cables, in particular to a simulation experiment device for diffusion of dissolved gas in insulating oil in an oil-filled cable.
Background
The submarine cable plays an indispensable role in high-voltage and high-capacity cross-sea power transmission engineering, and the reliability and safety of the submarine cable directly influence the safety and stability of the operation of a power system. If the hidden trouble of cable inside can in time carry out the early warning, then can effectively improve the safety and stability of cable operation.
One form of cable commonly used for submarine cables is a self-contained, oil-filled cable, the insulation of which is shared by solids and liquids. The oil-filled cable consists of a wire core, an insulating layer, a semi-conductive shielding layer, a sheath, a reinforcing layer, a polyethylene sleeve, a mothproof protective layer, a polypropylene plastic wire cushion layer and a steel wire armor, wherein the insulating layer is wrapped by impregnated paper to be used as solid insulation, the wire core is of a hollow structure, an oil duct is arranged in the center of the wire core, and insulating oil is filled into the wire core to be used as liquid insulation. When the load changes, the temperature of the oil duct changes along with the change, the insulating oil in the oil duct expands and flows out when the temperature rises, and the expanded insulating oil flows into the oil supply tank through the oil duct; when the temperature is reduced, the insulating oil shrinks, and the insulating oil in the oil supply tank returns to the insulating layer through the oil duct to fill the interlayer gap. The insulating mechanism can timely release stress caused by deformation caused by load change inside the cable, avoid mechanical aging or even direct damage to the cable caused by overlarge internal pressure, and simultaneously eliminate an air gap of an insulating layer, thereby improving the insulating strength.
Operational accidents of submarine cables are mainly caused by insulation failures. When the inner layer of the oil duct or the outer layer of the wire core has local electrical or thermal faults, the insulating oil in the oil duct and the impregnated paper in the insulating layer are decomposed due to electrical or thermal stress, and various fault gases are generated and dissolved in the insulating oil. At present, in the aspect of fault diagnosis of oil-filled power equipment, a method is widely adopted, and the method is used for diagnosing internal fault types or fault hidden dangers by detecting the content of specific fault gas dissolved in oil and analyzing the proportional relation among the contents of the gas. The method is called as a Dissolved Gas Analysis (DGA) technology in oil, the DGA technology is used in oil-filled transformers for years and achieves good effects, and engineering practice proves that the method is an effective fault diagnosis technology. However, the technology is not applied in the field of oil-filled cables, and corresponding fault diagnosis basis and standard are lacked.
In order to enable the DGA technology to be applied to oil-filled cable fault detection as early as possible and enable the oil-filled cable to have effective fault diagnosis and early warning means, corresponding fault diagnosis criteria and diagnosis standards need to be established. At present, the existing diagnostic standard is only suitable for power transformers, and oil-filled cables are greatly different from the power transformers in structural design, working environment and the types of used insulating oil, so that research on DGA technical fault criteria of the oil-filled cables needs to be carried out. DGA fault criteria in the field of power transformers are derived from empirical data obtained from fault cases in the existing engineering, and the application time of domestic high-capacity and high-voltage-level oil-filled cables is short, and no enough fault cases exist to form the criteria, so that the electrical or thermal fault generated in the oil-filled cable needs to be simulated by a laboratory method, the gas production rule under the fault condition of insulating oil and the diffusion rule of dissolved gas in an oil duct of the cable are researched, and reference is provided for the DGA criteria suitable for the oil-filled cable on the basis.
The existing DGA fault simulation device or test device has the problems of non-targeted oil-filled cable environment, and large difference between simulation condition and engineering actual condition. The invention application CN201410188446 discloses an electrical fault simulation device in a transformer, which can simulate electrical faults in insulating oil for the transformer and can collect oil samples for analysis after the faults, the device consists of an oil container for containing the insulating oil and an electrode pair arranged in the oil container and used for discharging, an oil taking hole for taking out the insulating oil is arranged on the side wall of the oil container, an upper electrode and a lower electrode penetrate through the top of the container and are connected with the bottom of the container and an external high-voltage power supply, the insulating oil is injected into the container, then the voltage source applies pressure to the upper electrode and the lower electrode immersed in the oil to form discharging so as to simulate various electrical faults, and the oil is taken through an oil taking port to detect dissolved gas after the faults are completed. The device can simulate the electrical fault in the transformer, but the difference between the environment of the insulating oil in the device and the actual situation, particularly the actual situation in an oil-filled cable, is huge, so that the effective simulation of the actual situation by the developed electrical test cannot be ensured; secondly, the type of the fault which can be simulated by the device is limited, and only the electrical fault in the oil filling equipment can be simulated, but the thermal fault cannot be simulated; finally, due to the structural design limitation of the device, the related research on the diffusion rule of the dissolved gas in the oil cannot be carried out.
Disclosure of Invention
In view of the above, the present invention provides an experimental apparatus for simulating diffusion of dissolved gas in insulating oil in an oil-filled cable, which can simulate electrical and thermal faults in an oil duct of the oil-filled cable and collect an oil sample for analysis after the fault is over, so as to master a fault gas generation rule of the insulating oil in the oil-filled cable; on the other hand, insulating oil capable of dissolving single gas can be directly injected into the oil duct, and the insulating oil can be analyzed by collecting insulating oil samples at different positions, so that the diffusion rule of various dissolved gases in the oil-filled cable can be mastered, and reference can be provided for early warning and diagnosis of internal faults of the oil-filled cable.
In order to achieve the purpose, the invention adopts the technical scheme that:
a simulation experiment device for the diffusion of dissolved gas in insulating oil in an oil-filled cable comprises a cable simulator and an external test cavity, wherein the cable simulator is arranged in the external test cavity;
the cable simulating body comprises an oil duct and an insulating layer;
the oil duct is of a tubular structure, the insulating layer is wound outside the oil duct, the length of the wound insulating layer is shorter than that of the oil duct, so that two ends of the oil duct are exposed, and the oil duct is connected with a middle oil taking device in an external test cavity through a middle opening of the insulating layer;
the external test cavity comprises an outer cover, a connecting sleeve, a middle oil taking device, an oil injecting and taking terminal and a fault simulation terminal;
the outer cover is of a tubular structure, the length of the outer cover is greater than that of the insulating layer, the inner diameter of the outer cover is greater than the outer diameter of the insulating layer, outer cover flanges are arranged at two ends of the outer cover and used for being connected with the connecting sleeve, and an opening in the middle of the outer cover is connected with the middle oil taking device;
the connecting sleeve is of a tubular structure, the length of the connecting sleeve is larger than the distance from the tail end of the insulating layer in the cable simulator to the tail end of the oil duct, the connecting sleeve is provided with two parts which are respectively sleeved at two ends of the oil duct, two ends of the connecting sleeve are respectively provided with a connecting sleeve flange, one end of the connecting sleeve flange is connected with the outer cover flange, and the other end of the connecting sleeve flange is connected with the.
Furthermore, the middle oil taking device comprises a control valve and an oil pipe, the oil pipe penetrates through the openings in the middle of the outer cover, the middle of the insulating layer and the middle of the oil duct and extends into the oil duct, the oil pipe is connected with the outer cover through threads, and the control valve is installed on the oil pipe and used for controlling the on-off of the oil pipe.
Furthermore, annotate and get oily terminal including annotating oil pipe one, get oil pipe, oil pressure gauge and annotate and get oily terminal flange, annotate oil pipe one, get the pipeline of oil pipe and oil pressure gauge and all pierce through and install on annotating and get oily terminal flange, annotate oil pipe one and get and all be equipped with the valve on the oil pipe, annotate and get oily terminal flange and be connected with the adapter sleeve flange.
Furthermore, the fault simulation terminal is a thermal fault simulation terminal and comprises a thermal fault simulation terminal flange, a thermocouple and a heating pipe, wherein the thermocouple and the heating pipe are installed on the thermal fault simulation terminal flange in a penetrating mode, and the thermal fault simulation terminal flange is connected with the connecting sleeve flange.
Furthermore, the fault simulation terminal is an electrical fault simulation terminal and comprises an electrode, an electrode connecting rod and an electrical fault simulation terminal flange, the electrode connecting rod is penetratingly arranged on the electrical fault simulation terminal flange, the electrode is arranged at the end part of the electrode connecting rod, and the electrical fault simulation terminal flange is connected with the connecting sleeve flange.
Furthermore, the fault simulation terminal is an oil injection terminal and comprises an oil injection pipe II and an oil injection terminal flange, wherein the oil injection pipe II is penetratingly arranged on the oil injection terminal flange, a sealing valve is arranged on the oil injection pipe II, and the oil injection terminal flange is connected with the connecting sleeve flange.
Preferably, the oil duct be copper product tubular structure, the insulating layer wrap up for insulating kraft paper and form, the dustcoat be stainless steel tubular structure, the adapter sleeve be stainless steel.
Further, the outer test chamber also comprises a bracket for supporting and adjusting the height and the angle of the outer cover.
Compared with the prior art, the invention has the beneficial effects that:
1. the simulation experiment device provided by the invention can realize that the fault simulation is closer to the actual situation, the fault simulation object covers solid and liquid insulation in the oil-filled cable, the fault simulation type covers electricity and heat, the fault occurrence environment is also close to the actual cable internal environment, and the angle of the simulation device can be changed by adjusting the support, so that the cables with different laying angles can be simulated.
2. The simulation experiment device can realize various types of fault simulation, can realize electric and thermal faults in the oil duct by replacing the fault simulation terminal, and can also research the diffusion of dissolved gas by directly injecting the dissolved gas.
3. The simulation experiment device can realize the multi-point sampling function, the oil injection and extraction terminal and the middle oil extraction device can simultaneously collect oil samples in the oil duct, and meanwhile, the collection of the oil samples in different places can be used for carrying out experimental verification and research on the diffusion of dissolved gas in oil.
4. The simulation experiment device has controllable fault conditions, the hot spot temperature can be monitored by the thermocouple during thermal fault simulation, and the temperature is regulated by controlling the applied voltage; electrical fault simulation may record a voltage from an applied high voltage source.
Drawings
FIG. 1 is a schematic structural diagram of a simulation experiment device for diffusion of dissolved gas in insulating oil in an oil-filled cable according to the present invention;
FIG. 2 is a schematic structural view of a thermal fault simulation terminal of the present invention;
FIG. 3 is a schematic diagram of the electrical fault simulation terminal of the present invention;
FIG. 4 is a schematic view of the oil injection terminal of the present invention;
FIG. 5 is a schematic structural view of the oil injection and extraction terminal of the present invention;
description of reference numerals: 1-an oil duct; 2-an insulating layer; 3-a housing; 4-connecting sleeves; 5-a middle oil extraction device; 6-oil injection and extraction terminal; 7-fault simulation terminal; 8-thermal fault terminal connection flange; 9-heating a tube; 10-a thermocouple; 11-penetrating the fixing; 12-an electrical fault terminal connection flange; 13-an electrode connection rod; 14-an electrode; 15-oiling terminal connecting flange; 16-a second oil filling pipe; 17-a sealing valve; 18-oil injection and extraction terminal flange; 19-taking an oil pipe; 20-a first oil filling pipe; 21-oil pressure gauge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of embodiments of the present invention, and not all embodiments.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Example one
As shown in fig. 1, the experimental apparatus for simulating diffusion of dissolved gas in insulating oil in an oil-filled cable of this embodiment mainly includes a cable simulator and an external test chamber.
The cable simulation body includes oil duct 1 and insulating layer 2, and oil duct 1 is copper product tubular structure, and insulating layer 2 is insulating kraft paper for the insulating usefulness to wrap the form and fix in 1 outside of copper oil duct, and the length of insulating layer 2 is shorter than oil duct 1 for 1 both ends of oil duct all have partial copper pipe not by the kraft paper cladding, and 1 both ends of oil duct expose promptly, and oil duct 1 is connected with the middle part oil extraction device 5 of 2 middle part trompils of insulating layer and outside test chamber.
The external test chamber comprises an outer cover 3, two connecting sleeves 4, a middle oil taking device 5, an oil injecting and taking terminal 6 and a replaceable fault simulation terminal 7.
The outer cover 3 is sleeved on the cable simulator and is of a stainless steel tubular structure, the length of the outer cover is slightly larger than that of the insulating layer 2, the inner diameter of the outer cover is slightly larger than the outer diameter of the insulating layer 2, stainless steel flanges are arranged at two ends of the outer cover 3 and are used for being connected with the connecting sleeve 4, and a hole in the middle of the outer cover 3 is connected with the middle oil taking device 5.
The connecting sleeve 4 is made of stainless steel, the length of the connecting sleeve is slightly larger than the distance from the tail end of the insulating layer 2 in the cable simulator to the tail end of the oil duct 1, the connecting sleeve is respectively sleeved on copper pipes exposed at two ends of the oil duct 1, stainless steel flanges are arranged at two ends of the connecting sleeve 4, the flange close to the inner side is connected with the flange of the outer cover 3, and the flange close to the outer side is connected with flanges of the oil injection and extraction terminal 6 and the fault simulation terminal 7.
The middle oil taking device 5 comprises a control valve and an oil pipe, the oil pipe penetrates through holes in the middle of the outer cover 3, the middle of the insulating layer 2 and the middle of the oil duct 1 and extends into the oil duct 1, the oil pipe is connected with the outer cover 3 through threads, and the control valve is installed on the oil pipe and used for controlling the on-off of the oil pipe.
The structure of the oil injection and extraction terminal 6 is shown in fig. 5, and comprises an oil injection and extraction terminal flange 18, an oil extraction pipe 19, an oil injection pipe I20 and an oil pressure gauge 21. The pipelines of the oil taking pipe 19, the oil injection pipe I20 and the oil pressure gauge 21 are all installed on the oil injection terminal flange 18 in a penetrating mode, valves are installed on the oil taking pipe 19 and the oil injection pipe I20, and the oil injection and taking terminal 6 is connected with the flange of the connecting sleeve 4 through the oil injection and taking terminal flange 18.
The fault simulation terminal 6 comprises three types of thermal fault, electrical fault and direct oil injection, wherein the thermal fault simulation terminal is used in the embodiment and is structurally shown in fig. 2 and comprises a thermal fault simulation terminal flange 8, a heating pipe 9, a thermocouple 10 and a penetrating fixing piece 11. The heating pipe 9 and the thermocouple 10 are fixed on a thermal fault simulation terminal flange 8 through a penetrating fixing piece 11, the thermal fault simulation terminal is connected with a flange of the connecting sleeve 4 through the thermal fault simulation terminal flange 8, and the heating pipe 9 and the thermocouple 11 extend into the oil duct 1.
On experimental apparatus connects the back and arranges adjustable support in, will annotate and link to each other with the oil pump with annotating a notes oil pipe 20 of getting oil terminal 6, through injecting insulating oil in oil duct 1 by the oil pump, support angle regulation makes experimental apparatus slope during the oiling, the gaseous emission in oil duct 1 and the device of being convenient for. After the oil injection is finished, a power supply of the heating pipe 9 is connected to perform thermal fault simulation, and the voltage is adjusted through the temperature fed back by the thermocouple 10. And after the thermal fault simulation is finished, the power supply of the heating pipe 9 is turned off, and the oil sample is collected through the oil taking pipe 19 and the middle oil taking device 5 to perform gas analysis in oil.
The experimental device of the embodiment can realize the simulation of thermal fault in the oil-filled cable and the collection of oil samples at different positions after the fault.
Example two:
on the basis of the first embodiment, the fault simulation terminal 7 is changed from a thermal fault simulation terminal to an electrical fault simulation terminal, the electrical fault simulation terminal is structurally shown in fig. 3 and comprises an electrical fault simulation terminal flange 12, an electrode connecting rod 13 and an electrode 14, the electrode connecting rod 13 is penetratingly mounted on the electrical fault simulation terminal flange 12, the electrode 14 is fixed at the end part of the oil passage 1 of the electrode connecting rod 13, and the electrical fault simulation terminal is connected with the flange of the connecting sleeve 4 through the electrical fault simulation terminal flange 12.
During the experiment, the electrode connecting rod 13 is connected with a high-voltage electrode of a high-voltage power supply, the ground electrode is connected with a flange of the connecting sleeve 4, the device connection and the oil filling process are consistent with the embodiment, the voltage is increased through the high-voltage power supply after the oil filling is finished, a breakdown or partial discharge type electrical fault is manufactured in the oil duct 1, the power supply is firstly disconnected after the fault is finished, and the oil sample collection process is consistent with the embodiment.
The experimental device of the embodiment can realize the simulation of electrical faults in the oil-filled cable and the collection of oil samples at different positions after the faults.
Example three:
on the basis of the first embodiment, the fault simulation terminal 7 is changed from a thermal fault simulation terminal to an oil injection terminal, and the oil injection terminal structure is as shown in fig. 4, and includes an oil injection terminal flange 15, a second oil injection pipe 16 and a sealing valve 17, where the second oil injection pipe 16 is penetratingly mounted on the oil injection terminal flange 15, the sealing valve 17 is mounted on the second oil injection pipe 16 on the outer side, and the oil injection terminal is connected with the flange of the connecting sleeve 4 through the oil injection terminal flange 15.
The laboratory device connection and oil filling process is consistent with the embodiment, after oil filling is completed, an oil sample dissolved in single gas is filled into the oil duct 1 through the oil filling pipe II 16, the height of the support is adjusted according to test requirements, the placing angle of the device meets the test requirements, the device is placed for a specified time and then is sampled, and the sampling method is consistent with the embodiment.
The experimental device of this embodiment can realize single dissolved gas diffusion simulation and oil appearance collection in the oil charge cable, can study the diffusion of dissolved gas in oil duct insulating oil through the single gas concentration in the different positions oil appearance of contrast.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (8)
1. The utility model provides an insulating oil dissolved gas diffusion simulation experiment device in oil-filled cable which characterized in that: the test device comprises a cable simulator and an external test cavity, wherein the cable simulator is arranged in the external test cavity;
the cable simulating body comprises an oil duct and an insulating layer;
the oil duct is of a tubular structure, the insulating layer is wound outside the oil duct, the length of the wound insulating layer is shorter than that of the oil duct, so that two ends of the oil duct are exposed, and the oil duct is connected with a middle oil taking device in an external test cavity through a middle opening of the insulating layer;
the external test cavity comprises an outer cover, a connecting sleeve, a middle oil taking device, an oil injecting and taking terminal and a fault simulation terminal;
the outer cover is of a tubular structure, the length of the outer cover is greater than that of the insulating layer, the inner diameter of the outer cover is greater than the outer diameter of the insulating layer, outer cover flanges are arranged at two ends of the outer cover and used for being connected with the connecting sleeve, and an opening in the middle of the outer cover is connected with the middle oil taking device;
the connecting sleeve is of a tubular structure, the length of the connecting sleeve is larger than the distance from the tail end of the insulating layer in the cable simulator to the tail end of the oil duct, the connecting sleeve is provided with two parts which are respectively sleeved at two ends of the oil duct, two ends of the connecting sleeve are respectively provided with a connecting sleeve flange, one end of the connecting sleeve flange is connected with the outer cover flange, and the other end of the connecting sleeve flange is connected with the.
2. The experimental device for simulating the diffusion of the dissolved gas in the insulating oil in the oil-filled cable according to claim 1, wherein: the middle oil taking device comprises a control valve and an oil pipe, the oil pipe penetrates through the openings in the middle of the outer cover, the middle of the insulating layer and the middle of the oil duct and extends into the oil duct, the oil pipe is connected with the outer cover through threads, and the control valve is installed on the oil pipe and used for controlling the on-off of the oil pipe.
3. The experimental device for simulating the diffusion of the dissolved gas in the insulating oil in the oil-filled cable according to claim 1, wherein: annotate and get oily terminal including annotating oil pipe one, get oil pipe, oil pressure gauge and annotate and get oily terminal flange, annotate oil pipe one, get the pipeline of oil pipe and oil pressure gauge and all pierce through to install on annotating and get oily terminal flange, annotate oil pipe one and get and all be equipped with the valve on the oil pipe, annotate and get oily terminal flange and be connected with the adapter sleeve flange.
4. The experimental device for simulating the diffusion of the dissolved gas in the insulating oil in the oil-filled cable according to claim 1, wherein: the fault simulation terminal is a thermal fault simulation terminal and comprises a thermal fault simulation terminal flange, a thermocouple and a heating pipe, wherein the thermocouple and the heating pipe are installed on the thermal fault simulation terminal flange in a penetrating mode, and the thermal fault simulation terminal flange is connected with the connecting sleeve flange.
5. The experimental device for simulating the diffusion of the dissolved gas in the insulating oil in the oil-filled cable according to claim 1, wherein: the fault simulation terminal is an electric fault simulation terminal and comprises an electrode, an electrode connecting rod and an electric fault simulation terminal flange, the electrode connecting rod is penetratingly arranged on the electric fault simulation terminal flange, the electrode is arranged at the end part of the electrode connecting rod, and the electric fault simulation terminal flange is connected with the connecting sleeve flange.
6. The experimental device for simulating the diffusion of the dissolved gas in the insulating oil in the oil-filled cable according to claim 1, wherein: the fault simulation terminal is an oil injection terminal and comprises an oil injection pipe II and an oil injection terminal flange, the oil injection pipe II is penetratingly arranged on the oil injection terminal flange, a sealing valve is arranged on the oil injection pipe II, and the oil injection terminal flange is connected with the connecting sleeve flange.
7. The experimental device for simulating the diffusion of the dissolved gas in the insulating oil in the oil-filled cable according to claim 1, wherein: the oil duct be copper product tubular structure, the insulating layer form for insulating kraft paper wraps up, the dustcoat be stainless steel tubular structure, the adapter sleeve be stainless steel material.
8. The experimental device for simulating the diffusion of the dissolved gas in the insulating oil in the oil-filled cable according to claim 1, wherein: the outer test chamber also includes a support for supporting and adjusting the height and angle of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011086038.7A CN112269016B (en) | 2020-10-12 | 2020-10-12 | Oil-filled cable internal insulation oil dissolved gas diffusion simulation experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011086038.7A CN112269016B (en) | 2020-10-12 | 2020-10-12 | Oil-filled cable internal insulation oil dissolved gas diffusion simulation experiment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112269016A true CN112269016A (en) | 2021-01-26 |
| CN112269016B CN112269016B (en) | 2022-11-04 |
Family
ID=74337914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011086038.7A Active CN112269016B (en) | 2020-10-12 | 2020-10-12 | Oil-filled cable internal insulation oil dissolved gas diffusion simulation experiment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112269016B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203798657U (en) * | 2014-05-06 | 2014-08-27 | 国家电网公司 | Transformer thermal fault simulation device |
| CN207081804U (en) * | 2017-07-21 | 2018-03-09 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of submarine cable high-voltage isulation performance test system |
| CN208255141U (en) * | 2018-03-27 | 2018-12-18 | 国网山东省电力公司电力科学研究院 | A kind of experimental provision that analogue transformer oil dissolved gas changes with shelf depreciation |
| CN109188213A (en) * | 2018-08-16 | 2019-01-11 | 西安西电变压器有限责任公司 | A kind of power transformer interior fault imitative experimental appliance |
| CN210222145U (en) * | 2019-05-08 | 2020-03-31 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Overheat fault simulation platform for current conversion direct current sleeve |
| US20200103391A1 (en) * | 2016-12-26 | 2020-04-02 | Hyosung Heavy Industries Corporation | Apparatus for detecting internal defect in transformer |
| CN111638434A (en) * | 2020-06-11 | 2020-09-08 | 国网电力科学研究院武汉南瑞有限责任公司 | High-voltage oil-filled cable terminal fault prediction device and method |
-
2020
- 2020-10-12 CN CN202011086038.7A patent/CN112269016B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203798657U (en) * | 2014-05-06 | 2014-08-27 | 国家电网公司 | Transformer thermal fault simulation device |
| US20200103391A1 (en) * | 2016-12-26 | 2020-04-02 | Hyosung Heavy Industries Corporation | Apparatus for detecting internal defect in transformer |
| CN207081804U (en) * | 2017-07-21 | 2018-03-09 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of submarine cable high-voltage isulation performance test system |
| CN208255141U (en) * | 2018-03-27 | 2018-12-18 | 国网山东省电力公司电力科学研究院 | A kind of experimental provision that analogue transformer oil dissolved gas changes with shelf depreciation |
| CN109188213A (en) * | 2018-08-16 | 2019-01-11 | 西安西电变压器有限责任公司 | A kind of power transformer interior fault imitative experimental appliance |
| CN210222145U (en) * | 2019-05-08 | 2020-03-31 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Overheat fault simulation platform for current conversion direct current sleeve |
| CN111638434A (en) * | 2020-06-11 | 2020-09-08 | 国网电力科学研究院武汉南瑞有限责任公司 | High-voltage oil-filled cable terminal fault prediction device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112269016B (en) | 2022-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107797041B (en) | Sensor environment compatibility test system in gas insulated electrical equipment | |
| CN109932307B (en) | Electric-heat combined aging experimental device and sampling method for transformer copper oil paper system | |
| CN111781476A (en) | Transformer dry-type casing defect simulation and performance state monitoring system and method | |
| CN112269016B (en) | Oil-filled cable internal insulation oil dissolved gas diffusion simulation experiment device | |
| CN105736953A (en) | Pressure sensing based liquid ammonia pipeline leak detection system with cladding layer and detection method | |
| JP5344337B2 (en) | Oil-filled electrical equipment state analysis apparatus and oil-filled electrical equipment state analysis method | |
| CN110530772B (en) | Integrative test device of coal sample high pressure meeting an emergency and carbon dioxide displacement coal bed methane | |
| CN106153644A (en) | Unsaturated soil three axle sample water content real-time testing probe and test device | |
| CN107702691A (en) | Power plant switchyard sedimentation early warning system and method based on electric inspection process robot | |
| CN112165019B (en) | Connector and repair device for bad electrical contact inside high-voltage cable | |
| CN101598639A (en) | Electrification oil sample acquisition device for oil-immersed sleeve pipe of transformer | |
| CN112858853A (en) | Method for testing and detecting moisture degree of vehicle-mounted EPR cable in acidic environment | |
| CN113358387A (en) | Converter transformer valve side sleeve simulation operation temperature test device and method | |
| CN104931561B (en) | It is a kind of to realize the electrochemical test experiment device of acoustic emission monitor(ing) under HTHP water environment | |
| Wang et al. | Dissolved gas analysis (DGA) of mineral oil under thermal faults with tube heating method | |
| CN108459243B (en) | Performance detection method of insulating liquid and insulating paper for power equipment | |
| US5675096A (en) | Apparatus and method for removing a wall portion from a wall of a tubular member | |
| CN113447085B (en) | Online monitoring device for hydrogen content, pressure and temperature of oil in oil equipment | |
| CN110456243B (en) | Insulation sample direct current breakdown testing device | |
| CN209264900U (en) | A kind of analog insulation media defect experimental rig and power-up field device | |
| CN104931410B (en) | A kind of thermal technology's simulating bench ECP monitors electrode and its application method on-line | |
| CN104360200B (en) | A kind of experimental rig and test method of high temperature high voltage resistant steam cable | |
| CN113702819A (en) | Electric arc experimental apparatus | |
| CN208366899U (en) | A kind of Novel coal sample clamper | |
| CN213482372U (en) | Oil-immersed insulating paper furfural production and dielectric response testing device based on uneven temperature field |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |