CN113281622A - Protection method for anticorrosive coating of buried metal energy transmission pipeline - Google Patents
Protection method for anticorrosive coating of buried metal energy transmission pipeline Download PDFInfo
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- CN113281622A CN113281622A CN202110472224.2A CN202110472224A CN113281622A CN 113281622 A CN113281622 A CN 113281622A CN 202110472224 A CN202110472224 A CN 202110472224A CN 113281622 A CN113281622 A CN 113281622A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 62
- 238000000576 coating method Methods 0.000 title claims abstract description 62
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 112
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052802 copper Inorganic materials 0.000 claims abstract description 38
- 239000010949 copper Substances 0.000 claims abstract description 38
- 230000015556 catabolic process Effects 0.000 claims abstract description 19
- 208000025274 Lightning injury Diseases 0.000 claims abstract description 6
- 238000011156 evaluation Methods 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 238000013101 initial test Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a protection method for an anticorrosive coating of a buried metal energy transmission pipeline, which comprises the following steps: testing the pressure resistance of the pipeline anticorrosive coating test piece by using a lightning impulse pressure resistance test device; evaluating the safety of the pipeline anticorrosive coating under the lightning stroke condition according to the pressure resistance test result; and if the safety evaluation is not qualified, connecting a grounding drainage copper bar in parallel in the length extension direction outside the pipeline. According to the invention, the impact pressure-resistant characteristic of the pipeline anticorrosive layer material is obtained through tests, a reference is provided for the safety evaluation of the anticorrosive layer under the condition of lightning stroke, and based on the impact pressure-resistant value of the anticorrosive layer, when the voltage of the anticorrosive layer is too high, in order to avoid the breakdown of the anticorrosive layer by a higher voltage formed on the anticorrosive layer of the pipeline, a copper bar is connected in parallel along the length extension direction outside the pipeline, so that the pipeline potential and the ground potential nearby are balanced.
Description
Technical Field
The invention relates to the technical field of electric power engineering, in particular to a method for protecting an anticorrosive coating of a buried metal energy transmission pipeline.
Background
Oil gas pipeline and electric wire netting are the life pulse of energy security, the demand of our country to the energy is increasing day by day in recent years's rapid development of economy, but our country's special geographical environment has made things about energy layout and electric power consumption that take fossil energy as the leading and has reverse distribution in geography, this makes large-scale, long distance energy transmission inevitable, to present, our country has 16 kilometers oil gas pipelines in transit, in order to give full play to the advantage of limited land resources, the electric power circuit and oil gas pipeline inevitably will appear the crossing condition of route, in some land tense areas even have the long distance to share the public corridor the condition, a large amount of electric power channels and oil gas pipeline are parallel.
When the alternating current transmission line normally runs and is close to an oil gas pipeline, if the transmission line is struck by lightning, the ground current flows through the soil, the potential gradient near the current injection point is rapidly raised, the resistance coupling influence is generated on the buried metal pipeline, finally, the inductive coupling and the resistance coupling act on the pipeline together, a higher voltage is formed on the pipeline anticorrosive coating, and the anticorrosive coating can be broken down.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a protection method for an anticorrosive coating of a buried metal energy transmission pipeline, so that the anticorrosive coating is prevented from being punctured by a higher voltage formed on the anticorrosive coating of the pipeline.
In order to solve the technical problems, the invention adopts the following technical scheme: the protection method of the anticorrosive coating of the buried metal energy transmission pipeline comprises the following steps:
testing the pressure resistance of the pipeline anticorrosive coating test piece by using a lightning impulse pressure resistance test device;
evaluating the safety of the pipeline anticorrosive coating under the lightning stroke condition according to the pressure resistance test result;
and if the safety evaluation is not qualified, connecting a grounding drainage copper bar in parallel in the length extension direction outside the pipeline.
Preferably, the lightning impulse withstand voltage test device comprises a test container filled with insulating oil, a high-voltage impulse voltage generator and a high-voltage electrode, wherein the pipeline anticorrosive layer test piece is arranged in the test container and is immersed in the insulating oil, the high-voltage electrode is connected with the high-voltage impulse voltage generator through a lead, and negative-polarity lightning impulse voltage is applied to the pipeline anticorrosive layer test piece through the high-voltage impulse voltage generator.
Preferably, the lightning impulse withstand voltage test device further comprises a voltage divider connected with the high-voltage electrode and an oscilloscope connected with the voltage divider.
Preferably, after finding out the approximate breakdown voltage of the anticorrosive coating with the specification corresponding to the anticorrosive coating test piece of the pipeline through a trial test, reducing 5kV as the initial test voltage on the basis of the breakdown voltage, and then gradually increasing the step length by 1kV for pressurization until the anticorrosive coating test piece of the pipeline is broken down.
Preferably, the method of the trial test is as follows: firstly, applying an impact voltage of 70kV to a test sample, judging whether the test sample is broken down or not through the waveform of an oscilloscope, and if the test sample is not broken down, increasing 5kV for impact pressurization again; and otherwise, if the breakdown occurs, replacing the test sample or changing the contact part of the high-voltage electrode and the test sample, reducing the impact pressurization again by 5kV, and finding out the impact breakdown voltage range of the test sample after repeated tests.
Preferably, after the range of the breakdown voltage of the test sample is determined, the test is carried out according to the following test steps:
s1, grounding a test piece of the corrosion-resistant layer of the pipeline, and determining whether the exposed metal part of the test piece of the corrosion-resistant layer of the pipeline is conducted with a grounding wire before insulating oil is put into the test piece;
s2, immersing the pipeline anticorrosive coating test piece test container in insulating oil, and determining whether the exposed metal part of the pipeline anticorrosive coating test piece is conducted with a grounding wire;
s3, placing the high-voltage electrode on the pipeline anticorrosive coating test piece and completely contacting the high-voltage electrode;
s4, operating a high-voltage impulse voltage generator, charging, igniting an air gap, discharging, and applying a standard negative polarity lightning voltage waveform with a voltage waveform of 1.2/50 mu s to the pipeline anticorrosive coating test piece;
s5, recording the waveform by using an oscilloscope, measuring the discharge voltage and storing the discharge voltage;
and S6, switching the test points to prepare the next test.
Preferably, the test piece of the pipeline anticorrosive coating is formed by cutting and processing the pipeline, the radial projection is circular, and the diameter is 10 cm.
Preferably, the number of the connecting points of the grounding drainage copper bars is three, and the three connecting points are connected with the pipeline at equal intervals.
Preferably, the length of the copper row for grounding drainage is greater than 100m and less than 200 m.
Preferably, the distance between the grounding drainage copper bar and the pipeline is less than 1 m.
According to the invention, the impact pressure-resistant characteristic of the pipeline anticorrosive layer material is obtained through tests, a reference is provided for the safety evaluation of the anticorrosive layer under the condition of lightning stroke, and based on the impact pressure-resistant value of the anticorrosive layer, when the voltage of the anticorrosive layer is too high, in order to avoid the breakdown of the anticorrosive layer by a higher voltage formed on the anticorrosive layer of the pipeline, a copper bar is connected in parallel along the length extension direction outside the pipeline, so that the pipeline potential and the ground potential nearby are balanced.
The following detailed description of the present invention will be provided in conjunction with the accompanying drawings.
Drawings
The invention is further described with reference to the accompanying drawings and the detailed description below:
FIG. 1 is a schematic structural diagram of a lightning impulse withstand voltage test device;
fig. 2 is a schematic diagram of a three-point connection structure of the grounding drainage copper bar and the pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The protection method of the anticorrosive coating of the buried metal energy transmission pipeline comprises the following steps:
testing the pressure resistance of the pipeline anticorrosive coating test piece by using a lightning impulse pressure resistance test device;
evaluating the safety of the pipeline anticorrosive coating under the lightning stroke condition according to the pressure resistance test result;
if the safety evaluation is not qualified, as shown in fig. 2, a grounding drainage copper bar 101 is connected in parallel outside the pipeline 100 along the length extension direction.
As shown in figure 1, the lightning impulse withstand voltage test device comprises a test container 1 filled with insulating oil, a high-voltage impulse voltage generator 3 and a high-voltage electrode 2, wherein a pipeline anticorrosive coating test piece is arranged in the test container and is immersed in the insulating oil, the high-voltage electrode is connected with the high-voltage impulse voltage generator through a lead, and negative-polarity lightning impulse voltage is applied to a pipeline anticorrosive coating test product by the high-voltage impulse voltage generator.
Further, the lightning impulse withstand voltage test device further comprises a voltage divider 4 connected with the high-voltage electrode and an oscilloscope 5 connected with the voltage divider.
After the approximate breakdown voltage of the anticorrosive coating with the corresponding specification of the pipeline anticorrosive coating test piece is found out through a trial test, 5kV is reduced on the basis of the breakdown voltage to serve as an initial test voltage, and then pressurization is carried out gradually and gradually in a step length of 1kV until the pipeline anticorrosive coating test piece is broken down.
The method of the trial test is as follows: firstly, applying an impact voltage of 70kV to a test sample, judging whether the test sample is broken down or not through the waveform of an oscilloscope, and if the test sample is not broken down, increasing 5kV for impact pressurization again; and otherwise, if the breakdown occurs, replacing the test sample or changing the contact part of the high-voltage electrode and the test sample, reducing the impact pressurization again by 5kV, and finding out the impact breakdown voltage range of the test sample after repeated tests.
After the range of the impulse breakdown voltage of the test sample is determined, the test is carried out according to the following test steps:
s1, grounding a test piece of the corrosion-resistant layer of the pipeline, and determining whether the exposed metal part of the test piece of the corrosion-resistant layer of the pipeline is conducted with a grounding wire before insulating oil is put into the test piece;
s2, immersing the pipeline anticorrosive coating test piece test container in insulating oil, and determining whether the exposed metal part of the pipeline anticorrosive coating test piece is conducted with a grounding wire;
s3, placing the high-voltage electrode on the pipeline anticorrosive coating test piece and completely contacting the high-voltage electrode;
s4, operating a high-voltage impulse voltage generator, charging, igniting an air gap, discharging, and applying a standard negative polarity lightning voltage waveform with a voltage waveform of 1.2/50 mu s to the pipeline anticorrosive coating test piece;
s5, recording the waveform by using an oscilloscope, measuring the discharge voltage and storing the discharge voltage;
and S6, switching the test points to prepare the next test.
The test piece of the pipeline anticorrosive coating is formed by cutting and processing the pipeline anticorrosive coating, the radial projection is circular, and the diameter is 10 cm.
According to the analysis of the historical data of lightning strikes near the pipeline, if the pipeline is struck by lightning, the higher voltage formed on the anticorrosive layer of the pipeline is greater than the breakdown voltage, the risk of breakdown of the anticorrosive layer of the pipeline exists, and the parallel grounding drainage copper bar is needed.
Considering the corrosion phenomenon of metal, once the connection point is corroded and broken, the protection effect is greatly weakened, and therefore the grounding drainage copper bar is connected in multiple points. As shown in fig. 2, in the present embodiment, there are three connection points of the ground drainage copper bars, and the connection points are connected to the pipes at equal intervals.
The three-point connection has the best protection effect, and the three-point connection mode is adopted for copper bars with different lengths so as to analyze the influence of the length of the copper bars on the protection effect. The lengths of the copper bars were set to 100m, 200m, 300m and 500m, and the results are shown in Table 1.
TABLE 1 influence of copper bar length on protection effect when the number of connection points is 3
The calculation results in table 1 show that the length of the parallel copper bar is not longer as good as possible, and when the length of the copper bar exceeds 200 meters, the maximum voltage of the pipeline anticorrosive coating decreases less and less along with the increase of the length of the copper bar, so that the protection effect is worse and worse. This is because, the length of increase copper bar can make the ratio of copper bar return circuit resistance and pipeline return circuit resistance reduce always, and when the return circuit resistance of copper bar was less than the return circuit resistance of pipeline, more electric currents can flow in the earth again through the copper bar, leads to the reduction of the range of reduction of coating electric potential and the increase of metal electric potential to reduce, and anticorrosive coating voltage presents the trend of increaseing again. Therefore, the length of the copper row grounding drain bar is more than 100m and less than 200 m.
Along with the increase of the radius of the copper bars at the parallel sections, the voltage of the anticorrosive coating of the pipeline at the parallel sections can be gradually reduced. This is because the larger the radius of the copper bar is, the more favorable the reduction of the field strength in the ground is, so that the potential difference inside and outside the anticorrosive coating is reduced. Therefore, copper bars with the radius larger than 1cm are preferably selected, and the radius can be 2cm or 3 cm.
The closer the copper bar is to the pipeline, the better the protection effect is, because the closer the copper bar is to the outer potential of the pipeline anticorrosive coating. Therefore, preferably, the distance between the grounding drainage copper bars and the pipeline is less than 1 m.
Preferably, the buried depth of the grounding drainage copper bar is the same as that of the pipeline, because the protection effect is the best when the buried depth of the grounding drainage copper bar is the same as that of the pipeline. Certainly, during the actual use, because the restriction of topography, the buried depth of copper bar has the difference, in order to reduce the excavation volume of site operation, can bury the copper bar shallowly.
Other embodiments of the present invention than the preferred embodiments described above, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, should fall within the scope of the present invention defined in the claims.
Claims (10)
1. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline is characterized by comprising the following steps of:
testing the pressure resistance of the pipeline anticorrosive coating test piece by using a lightning impulse pressure resistance test device;
evaluating the safety of the pipeline anticorrosive coating under the lightning stroke condition according to the pressure resistance test result;
and if the safety evaluation is not qualified, connecting a grounding drainage copper bar in parallel in the length extension direction outside the pipeline.
2. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline according to claim 1, characterized in that: the lightning impulse withstand voltage test device comprises a test container filled with insulating oil, a high-voltage impulse voltage generator and a high-voltage electrode, wherein a pipeline anticorrosive layer test piece is arranged in the test container and immersed in the insulating oil, the high-voltage electrode is connected with the high-voltage impulse voltage generator through a lead, and negative-polarity lightning impulse voltage is applied to a pipeline anticorrosive layer test product by the high-voltage impulse voltage generator.
3. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline according to claim 2, characterized in that: the lightning impulse withstand voltage test device further comprises a voltage divider connected with the high-voltage electrode and an oscilloscope connected with the voltage divider.
4. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline according to claim 3, characterized in that: after finding out the approximate breakdown voltage of the anticorrosive coating with the corresponding specification of the pipeline anticorrosive coating test piece through a trial test, reducing 5kV as the initial test voltage on the basis of the breakdown voltage, and then gradually increasing the step length by 1kV for pressurization until the pipeline anticorrosive coating test piece is broken down.
5. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline according to claim 4, characterized in that: the method of the trial test is as follows: firstly, applying an impact voltage of 70kV to a test sample, judging whether the test sample is broken down or not through the waveform of an oscilloscope, and if the test sample is not broken down, increasing 5kV for impact pressurization again; and otherwise, if the breakdown occurs, replacing the test sample or changing the contact part of the high-voltage electrode and the test sample, reducing the impact pressurization again by 5kV, and finding out the impact breakdown voltage range of the test sample after repeated tests.
6. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline according to claim 5, characterized in that: after the range of the impulse breakdown voltage of the test sample is determined, the test is carried out according to the following test steps:
s1, grounding a test piece of the corrosion-resistant layer of the pipeline, and determining whether the exposed metal part of the test piece of the corrosion-resistant layer of the pipeline is conducted with a grounding wire before insulating oil is put into the test piece;
s2, immersing the pipeline anticorrosive coating test piece test container in insulating oil, and determining whether the exposed metal part of the pipeline anticorrosive coating test piece is conducted with a grounding wire;
s3, placing the high-voltage electrode on the pipeline anticorrosive coating test piece and completely contacting the high-voltage electrode;
s4, operating a high-voltage impulse voltage generator, charging, igniting an air gap, discharging, and applying a standard negative polarity lightning voltage waveform with a voltage waveform of 1.2/50 mu s to the pipeline anticorrosive coating test piece;
s5, recording the waveform by using an oscilloscope, measuring the discharge voltage and storing the discharge voltage;
and S6, switching the test points to prepare the next test.
7. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline according to claim 1, characterized in that: the test piece of the pipeline anticorrosive coating is formed by cutting and processing the pipeline, the radial projection is circular, and the diameter is 10 cm.
8. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline according to any one of claims 1 to 7, wherein: the number of the connecting points of the grounding drainage copper bars is three, and the three connecting points are connected with the pipeline in an equidistant mode.
9. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline according to claim 8, characterized in that: the length of the grounding drainage copper bar is more than 100m and less than 200 m.
10. The method for protecting the anticorrosive coating of the buried metal energy transmission pipeline according to claim 8, characterized in that: the distance between the grounding drainage copper bar and the pipeline is less than 1 m.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945811A (en) * | 2021-09-28 | 2022-01-18 | 国网浙江省电力有限公司绍兴供电公司 | Pipeline safety assessment method for power grid under lightning stroke or grounding short circuit fault condition |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823166A (en) * | 2014-02-28 | 2014-05-28 | 武汉大学 | Fatigue testing device and method for solid insulation degradation process |
| CN104076258A (en) * | 2014-07-17 | 2014-10-01 | 重庆大学 | Discharge generation device of discharge simulation experiment system for particles in transformer oil |
| CN107807146A (en) * | 2017-12-06 | 2018-03-16 | 广东大鹏液化天然气有限公司 | The simulated test special purpose device and test method of a kind of thunder-strike current ablation pipeline |
| CN107807088A (en) * | 2017-12-06 | 2018-03-16 | 广东大鹏液化天然气有限公司 | Ablation simulated test special purpose device and test method of a kind of fault current to pipeline |
| CN207366493U (en) * | 2017-12-06 | 2018-05-15 | 广东大鹏液化天然气有限公司 | A kind of simulation test special purpose device of thunder-strike current ablation pipeline |
| CN110618360A (en) * | 2019-10-09 | 2019-12-27 | 国网江苏省电力有限公司电力科学研究院 | Lightning impulse discharge test system of liquid dielectric medium |
-
2021
- 2021-04-29 CN CN202110472224.2A patent/CN113281622A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823166A (en) * | 2014-02-28 | 2014-05-28 | 武汉大学 | Fatigue testing device and method for solid insulation degradation process |
| CN104076258A (en) * | 2014-07-17 | 2014-10-01 | 重庆大学 | Discharge generation device of discharge simulation experiment system for particles in transformer oil |
| CN107807146A (en) * | 2017-12-06 | 2018-03-16 | 广东大鹏液化天然气有限公司 | The simulated test special purpose device and test method of a kind of thunder-strike current ablation pipeline |
| CN107807088A (en) * | 2017-12-06 | 2018-03-16 | 广东大鹏液化天然气有限公司 | Ablation simulated test special purpose device and test method of a kind of fault current to pipeline |
| CN207366493U (en) * | 2017-12-06 | 2018-05-15 | 广东大鹏液化天然气有限公司 | A kind of simulation test special purpose device of thunder-strike current ablation pipeline |
| CN110618360A (en) * | 2019-10-09 | 2019-12-27 | 国网江苏省电力有限公司电力科学研究院 | Lightning impulse discharge test system of liquid dielectric medium |
Non-Patent Citations (1)
| Title |
|---|
| 谭波等: ""雷击线路杆塔时埋地油气管道防护措施与防护效果研究"", 《电瓷避雷器》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945811A (en) * | 2021-09-28 | 2022-01-18 | 国网浙江省电力有限公司绍兴供电公司 | Pipeline safety assessment method for power grid under lightning stroke or grounding short circuit fault condition |
| CN113945811B (en) * | 2021-09-28 | 2024-07-12 | 国网浙江省电力有限公司绍兴供电公司 | Pipeline safety assessment method for power grid under lightning stroke or grounding short circuit fault condition |
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Application publication date: 20210820 |
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