CN115752567A - Method for measuring ice-melting water drop parameters and deformation parameters of insulator in ice-melting period - Google Patents
Method for measuring ice-melting water drop parameters and deformation parameters of insulator in ice-melting period Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 238000002844 melting Methods 0.000 title claims abstract description 139
- 239000012212 insulator Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000008018 melting Effects 0.000 claims abstract description 55
- 238000005259 measurement Methods 0.000 claims abstract description 27
- 230000008859 change Effects 0.000 claims abstract description 10
- 230000007613 environmental effect Effects 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 238000010309 melting process Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010257 thawing Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention discloses a method for measuring ice-melting water drop parameters and deformation parameters of an insulator in an ice-melting period, which comprises the following steps: performing icing operation on the insulator by setting environmental parameters; adjusting environmental parameters to melt the ice-coated insulator in the environment, recording the initial diameter of the insulator in the ice melting period and the change of the deformation length of a water drop, and measuring the flow rate of the ice-melting water drop; and changing the icing degree, the ice melting test temperature, the measurement time and the measurement position to obtain the change rule of the water drop parameters and the deformation parameters. The invention provides a method for measuring parameters of ice-melting water drops and deformation parameters of an insulator in the ice-melting period, which considers the influence of the deformation of the water drops at the tip of an ice edge caused by the flow of an ice-melting water film on the discharge among umbrellas when the ice-coated insulator is in the ice-melting period.
Description
Technical Field
The invention relates to the technical field of insulation characteristics of ice-coated insulators, in particular to a method for measuring ice-melting water drop parameters and deformation parameters of an insulator in an ice-melting period.
Background
In cold regions, power transmission lines are susceptible to ice and snow disasters. The electrical strength of the insulator can be rapidly reduced due to ice coating, and in areas with severe ice coating, the phenomenon of flashover of the insulator can happen, so that the safe and stable operation of a power line is seriously threatened. The flashover voltage of the insulator in the icing period is higher than that in the deicing period, and ice flashover is usually generated in the melting stage after ice is accumulated and a water film exists on the surface of the ice. When the temperature rises, the icing insulators are gradually increased along with the continuous surface layer water condensation in the ice melting process, a water film generated on the ice surface is gradually gathered at the tip end of the ice edge under the action of gravity to form ice melting water drops, the distortion of the gap field intensity is caused, the discharging phenomenon at the air gap of the ice tip is more frequent, the ice melting water is continuously gathered and flows to the high-voltage end under the action of gravity, strip water flow is easily generated to continuously drop at the lower end of the long string of insulators, after a period of melting, the water flow can form a communicated water curtain along the ice edge, the high-conductivity water film enables a conductive channel to be quickly formed, the icing insulators are easily short-circuited at the moment, and flashover is caused. Therefore, the analysis of the characteristic parameters of the ice-melting water drops of the insulator during the ice-melting period has important significance for understanding and analyzing the discharge and flashover characteristics of the insulator during the ice-melting period.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and title of the application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above-mentioned conventional problems.
Therefore, the technical problem solved by the invention is as follows: the prior art can not know the change rule of ice melting water drop parameters and deformation parameters of the insulator in the ice melting period, so that the ice-coated insulator is very easy to be short-circuited in the ice melting period, and flashover is caused.
In order to solve the technical problems, the invention provides the following technical scheme: a method for measuring ice melting water drop parameters and deformation parameters of an insulator in an ice melting period comprises the following steps:
performing icing operation on the insulator by setting environmental parameters;
adjusting environmental parameters to melt the ice-coated insulator in the environment, recording the initial diameter of the insulator in the ice melting period and the change of the deformation length of a water drop, and simultaneously measuring the flow rate of the ice-melting water drop;
and changing the icing degree, the ice melting test temperature, the measurement time and the measurement position to obtain the change rule of the water drop parameters and the deformation parameters.
As an optimal scheme of the method for measuring the ice-melting water drop parameters and the deformation parameters of the insulator in the ice-melting period, the method comprises the following steps: the icing operation comprises: the temperature is controlled to be-5 ℃ to-3 ℃, the conductivity of the ice coating water is 500uS/cm, and the ice coating condition is recorded every 10 min.
As an optimal scheme of the method for measuring the ice-melting water drop parameters and the deformation parameters of the insulator in the ice-melting period, the method comprises the following steps: after the icing is finished, the ice-coated insulator is kept hardened at-10 ℃ for 15min, and then the melting process is started.
As a preferable scheme of the method for measuring the ice-melting water drop parameter and the deformation parameter of the insulator during the ice-melting period, the method comprises the following steps: the thawing process comprises the following steps: under the two conditions of electrification and no electricity of the insulator, a camera is used for shooting and recording the melting condition of the ice arrises of each part of the insulator string, and computer software is used for measuring the initial diameter and the deformation length of the water drop.
As an optimal scheme of the method for measuring the ice-melting water drop parameters and the deformation parameters of the insulator in the ice-melting period, the method comprises the following steps: the melting process also comprises measuring the flow rate of the ice-melting water drops;
the ice-melting water drop parameters comprise the initial diameter of the water drop and the initial flow velocity of the water drop, and the deformation parameters of the water drop comprise the maximum deformation length before the water drop is broken.
As an optimal scheme of the method for measuring the ice-melting water drop parameters and the deformation parameters of the insulator in the ice-melting period, the method comprises the following steps: the ice-melting water drop flow rate measurement comprises:
after ice melting starts, a beaker is used for receiving an ice melting water drop 10s from the tip of an ice edge, and the mass m of the water drop is measured by an electronic balance, the mass flow rate of the water drop G = m/10, and then the initial flow rate of the water drop is expressed as:
wherein u is i Initial flow velocity of water droplets, d i Is the initial diameter of the water droplet.
As an optimal scheme of the method for measuring the ice-melting water drop parameters and the deformation parameters of the insulator in the ice-melting period, the method comprises the following steps: and taking the duty ratio of the ice edge length as an index of the ice coating degree, wherein the duty ratio of the ice edge length is defined as the percentage of the ice edge length in the air gap between two adjacent large umbrellas.
As an optimal scheme of the method for measuring the ice-melting water drop parameters and the deformation parameters of the insulator in the ice-melting period, the method comprises the following steps: when the insulator is a composite insulator, the duty ratio of the ice edge is defined as the percentage of the ice edge length in the gap between the two large umbrella skirts, and the interval range is set to be 10% -90%.
As an optimal scheme of the method for measuring the ice-melting water drop parameters and the deformation parameters of the insulator in the ice-melting period, the method comprises the following steps: the factors influencing the ice melting test temperature, the measurement time and the measurement position comprise:
when the test temperatures are different, the melting speeds of the insulators are different; when the measuring time is different, the melting speed is different; when the insulator is a long insulator string, the ice-melting water flow speed from the low-voltage end to the high-voltage end of the insulator is different.
As an optimal scheme of the method for measuring the ice-melting water drop parameters and the deformation parameters of the insulator in the ice-melting period, the method comprises the following steps: when the ice-melting water flow speed is measured, the test temperature setting interval is 3-15 ℃, and the test is carried out every 2 ℃; measuring the ice edges of the same shed gap every 30s until the flow rate of water drops is basically stable and unchanged, and stopping measuring; and respectively measuring the water flow speed of the ice edges coated on different umbrella skirts, and counting the ice melting speed of the tip of the ice edge at different positions of the insulator string from top to bottom.
The invention has the beneficial effects that: the invention provides a method for measuring parameters of ice-melting water drops and deformation parameters of an insulator in an ice-melting period, which considers the influence of the deformation of water drops at the tip of an ice edge caused by the flow of an ice-melting water film on the discharge between umbrellas when the ice-coated insulator is in the ice-melting period.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is an overall flowchart of a method for measuring parameters of ice-melting water drops and deformation parameters of an insulator during an ice-melting period according to an embodiment of the invention;
FIG. 2 is a diagram of a water drop dropping deformation process of a method for measuring ice melting water drop parameters and deformation parameters of an insulator during an ice melting period according to an embodiment of the invention;
fig. 3 is a schematic diagram of insulator string position numbers of the method for measuring ice-melting water drop parameters and deformation parameters of the insulator during the ice-melting period according to the embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures of the present invention are described in detail below, and it is apparent that the described embodiments are a part, not all or all of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially in general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Also in the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected and connected" in the present invention are to be understood broadly, unless otherwise explicitly specified or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Example 1
Referring to fig. 1, an embodiment of the present invention provides a method for measuring ice-melting water drop parameters and deformation parameters of an insulator during an ice-melting period, including:
s1: performing icing operation on the insulator by setting environmental parameters;
further, an icing operation comprising: the temperature is controlled to be-5 ℃ to-3 ℃, the conductivity of the ice coating water is 500uS/cm, and the ice coating condition is recorded every 10 min. After the icing is finished, the ice-coated insulator is kept hardened at-10 ℃ for 15min, and then the melting process is started.
S2: adjusting environmental parameters to melt the ice-coated insulator in the environment, recording the initial diameter of the insulator in the ice melting period and the change of the deformation length of a water drop, and simultaneously measuring the flow rate of the ice-melting water drop;
further, the thawing process comprises: under the two conditions of electrification and no electricity of the insulator, a camera is used for shooting and recording the melting condition of the ice arrises of each part of the insulator string, and computer software is used for measuring the initial diameter and the deformation length of the water drop. The melting process also comprises the step of measuring the flow rate of the ice-melting water drops; the parameters of the ice-melting water drop comprise the initial diameter of the water drop and the initial flow velocity of the water drop, and the deformation parameters of the water drop comprise the maximum deformation length before the water drop is broken.
Further, the ice-melt water droplet flow rate measurement comprises:
after ice melting starts, a beaker is used for receiving an ice melting water drop 10s from the tip of an ice edge, and the mass m of the water drop is measured by an electronic balance, the mass flow rate of the water drop G = m/10, and then the initial flow rate of the water drop is expressed as:
wherein u is i Initial flow velocity of water droplets, d i The initial diameter of the water droplet.
S3: and changing the icing degree, the ice melting test temperature, the measurement time and the measurement position to obtain the change rule of the water drop parameters and the deformation parameters.
Furthermore, the duty ratio of the ice length is used as an index of the ice coating degree, and the duty ratio of the ice length is defined as the percentage of the ice length to the air gap between two adjacent large umbrellas. When the insulator is a composite insulator, the duty ratio of the ice edge is defined as the percentage of the length of the ice edge in the gap between the two large umbrella skirts, and the interval range is set to be 10% -90%.
Further, the factors affecting the ice-melting test temperature, the measurement time and the measurement position include:
when the test temperatures are different, the melting speeds of the insulators are different; when the measuring time is different, the melting speed is different; when the insulator is a long string of insulators, the ice-melting water flow speed from the low-voltage end to the high-voltage end of the insulator is also different.
It should be noted that the melting speed of ice is increased by the increase of temperature; the measurement time is different, melts the speed difference, obtains through experimental measurement, melts the stability of speed and needs the certain time, because from beginning to melt, it needs the certain time to melt ice-water and collect in the tip of the icicle, and the insulator hangs perpendicularly in addition, and the water that the low pressure end flowed down can be accepted to the high-pressure end to lead to melting ice flowing water velocity difference.
Furthermore, when the ice melting water flow speed is measured, the test temperature setting interval is 3-15 ℃, and the test is carried out every 2 ℃; measuring the ice edges of the same shed gap every 30s until the flow rate of water drops is basically stable and unchanged, and stopping measuring; and respectively measuring the water flow speed of the ice edges coated on different umbrella skirts, and counting the ice melting speed of the tip of the ice edge at different positions of the insulator string from top to bottom.
Example 2
Referring to fig. 2-3, an embodiment of the present invention provides a method for measuring parameters of ice-melting water drops and deformation parameters of an insulator during an ice-melting period, and in order to verify the beneficial effects of the present invention, scientific demonstration is performed through a specific test process.
Step 1, suspending the insulator in a climatic laboratory, adjusting environmental parameters of the climatic laboratory, and icing the insulator, wherein a 110kV composite insulator is taken as an example to prepare the icing insulator. Controlling the indoor temperature of the climate chamber to be-5 ℃ to-3 ℃, controlling the conductivity of the ice coating water to be 500uS/cm, and recording the ice coating condition every 10 min.
And step two, melting the ice-coated insulator at a certain temperature, and measuring the initial diameter and the deformation length of the water drop in the ice melting period of the insulator by using Imagej software.
After the icing is finished, the icing insulator is kept to be hardened at the temperature of minus 10 ℃ for 15min, then the melting process is started, the melting condition of the ice arrises of all parts of the insulator string is shot and recorded by a camera under the two conditions of electrification and non-electrification of the insulator, and the initial diameter of the water drop and the deformation length of the water drop are measured by Imagej software. FIG. 2 shows a cycle of a water drop dropping process, in which the initial diameter of the water drop is defined as the diameter of the water drop when the semi-spherical water drop is formed at the tip of the ice, as shown in FIG. 2 (time 0 s); the maximum deformation length before the water droplet was broken is shown in fig. 2 (time 0.227 s).
And step three, representing the initial flow velocity of the ice-melting water drops by the mass flow rate of the water drops, and carrying out measurement calculation by using the water drops picked up by the beaker.
Due to the fact that the ice melting water drops are generated randomly and the like, the initial flow velocity of the water drops is difficult to measure. Thus, the initial flow rate of ice-melting water droplets is roughly estimated by measuring the mass flow rate of the droplets over a period of time, and measured without charging the insulator. And after the ice melting starts, connecting the ice melting water drops with a beaker at the tip of the ice edge for 10s, and measuring the mass m of the water drops by using an electronic balance, wherein the mass flow rate of the water drops G = m/10. The initial flow velocity u of the water droplets is obtained according to the following formula:
and step four, changing the influence factors such as the icing degree, the ice-melting test temperature, the measurement time and the measurement position, and obtaining the change rule of the water drop parameters and the deformation parameters.
The degree of icing is defined as: and taking the duty ratio of the ice edge length as an index of the ice coating degree, wherein the duty ratio of the ice edge length is defined as the percentage of the ice edge length in the air gap between two adjacent large umbrellas. Taking the composite insulator as an example, the duty ratio of the ice edge is defined as the percentage of the length of the ice edge in the gap between the two large umbrella skirts, and the duty ratio is set to be in the range of 10% to 90%.
In the process of measuring the ice-melting water flow speed, when the influence of the temperature on the flow speed is researched, the test temperature setting interval is 3-15 ℃, and the test is carried out at intervals of 2 ℃.
When the influence of the measurement time on the flow rate is researched, the ice edge of the same shed gap is measured for 60s as one measurement period, namely, after each measurement of 10s and 50s, the next measurement is carried out, and the measurement is stopped until the flow rate of the water drops is basically stable and unchanged.
When the influence of the measuring position on the flow rate is researched, different positions of the insulator string are numbered, and as shown in fig. 3, when the flow rate of water drops is basically stable and unchanged within a period of time, the ice melting speed of the tips of the icicles at different positions from top to bottom is counted.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A method for measuring ice-melting water drop parameters and deformation parameters of an insulator in an ice-melting period is characterized by comprising the following steps:
performing icing operation on the insulator by setting environmental parameters;
adjusting environmental parameters to melt the ice-coated insulator in the environment, recording the initial diameter of the insulator in the ice melting period and the change of the deformation length of a water drop, and simultaneously measuring the flow rate of the ice-melting water drop;
and changing the icing degree, the ice melting test temperature, the measurement time and the measurement position to obtain the change rule of the water drop parameters and the deformation parameters.
2. The method for measuring the parameters of the ice melting water drop and the deformation parameters of the insulator during the ice melting period as claimed in claim 1, wherein the method comprises the following steps: the icing operation comprising: the temperature is controlled to be-5 ℃ to-3 ℃, the conductivity of the ice coating water is 500uS/cm, and the ice coating condition is recorded every 10 min.
3. The method for measuring the parameters of the ice-melting insulator ice-melting water drop and the deformation parameters in the ice-melting period as claimed in claim 2, characterized in that: after the icing is finished, the ice-coated insulator is kept hardened at-10 ℃ for 15min, and then the melting process is started.
4. The method for measuring the parameters of the ice-melting insulator ice-melting water drop and the deformation parameters in the ice-melting period as claimed in claim 3, wherein the method comprises the following steps: the thawing process comprises the following steps: under the two conditions of electrification and no electricity of the insulator, a camera is used for shooting and recording the melting condition of the ice arrises of each part of the insulator string, and computer software is used for measuring the initial diameter and the deformation length of the water drop.
5. The method for measuring the parameters of the ice melting water drop and the deformation parameters of the insulator during the ice melting period as claimed in claim 4, wherein the method comprises the following steps: the melting process also comprises measuring the flow rate of the ice-melting water drops;
the ice-melting water drop parameters comprise the initial diameter of the water drop and the initial flow velocity of the water drop, and the deformation parameters of the water drop comprise the maximum deformation length before the water drop is broken.
6. The method for measuring the parameters of the ice-melting insulator ice-melting water drop and the deformation parameters in the ice-melting period as claimed in claim 5, wherein the method comprises the following steps: the ice-melting water drop flow rate measurement comprises:
after ice melting starts, a beaker is used for receiving an ice melting water drop 10s from the tip of an ice edge, and the mass m of the water drop is measured by an electronic balance, the mass flow rate of the water drop G = m/10, and then the initial flow rate of the water drop is expressed as:
wherein u is i Initial flow velocity of water droplets, d i The initial diameter of the water droplet.
7. The method for measuring the parameters of the ice melting water drop and the deformation parameters of the insulator during the ice melting period as claimed in claim 1, wherein the method comprises the following steps: and taking the duty ratio of the ice edge length as an index of the ice coating degree, wherein the duty ratio of the ice edge length is defined as the percentage of the ice edge length in the air gap between two adjacent large umbrellas.
8. The method for measuring the parameters of the ice-melting water drop and the deformation parameters of the insulator during the ice-melting period as claimed in claim 7, wherein the method comprises the following steps: when the insulator is a composite insulator, the duty ratio of the ice edge is defined as the percentage of the length of the ice edge in the gap between the two large umbrella skirts, and the interval range is set to be 10% -90%.
9. The method for measuring the parameters of the ice-melting water drop and the deformation parameters of the insulator during the ice-melting period as claimed in claim 8, wherein the method comprises the following steps: the factors influencing the ice melting test temperature, the measurement time and the measurement position comprise:
when the test temperatures are different, the melting speeds of the insulators are different; when the measuring time is different, the melting speed is different; when the insulator is a long insulator string, the ice-melting water flow speed from the low-voltage end to the high-voltage end of the insulator is different.
10. The method for measuring the parameters of the ice-melting water drop and the deformation parameters of the insulator during the ice-melting period as claimed in claim 9, wherein the method comprises the following steps: when the ice-melting water flow speed is measured, the test temperature setting interval is 3-15 ℃, and the test is carried out every 2 ℃; measuring the ice edge of the same shed gap every 30s until the flow rate of water drops is basically stable and unchanged, and stopping measuring; and respectively measuring the water flow speed of the ice edges coated on different umbrella skirts, and counting the ice melting speed of the tip of the ice edge at different positions of the insulator string from top to bottom.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785243A (en) * | 2016-04-08 | 2016-07-20 | 国家电网公司 | Evaluation method for insulator icing flashover risk of ultrahigh voltage alternating-current transmission line |
| CN107515361A (en) * | 2017-07-19 | 2017-12-26 | 国网湖南省电力公司 | A kind of insulator charged ice-melt flashover test method and system |
| CN109059818A (en) * | 2018-06-27 | 2018-12-21 | 贵州电网有限责任公司 | A kind of insulator and wire icing state equivalence calculation method |
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- 2022-10-28 CN CN202211339854.3A patent/CN115752567A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785243A (en) * | 2016-04-08 | 2016-07-20 | 国家电网公司 | Evaluation method for insulator icing flashover risk of ultrahigh voltage alternating-current transmission line |
| CN107515361A (en) * | 2017-07-19 | 2017-12-26 | 国网湖南省电力公司 | A kind of insulator charged ice-melt flashover test method and system |
| CN109059818A (en) * | 2018-06-27 | 2018-12-21 | 贵州电网有限责任公司 | A kind of insulator and wire icing state equivalence calculation method |
Non-Patent Citations (1)
| Title |
|---|
| LIN YANG等: ""Dynamic Deformation of Pendant Drops on the Edge of High-Voltage Bushing Sheds Under Extreme Rainfall"", 《IEEE ACCESS》, vol. 8, 25 June 2020 (2020-06-25), pages 118101 - 118113, XP011797209, DOI: 10.1109/ACCESS.2020.3004878 * |
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