External insulation configuration method and system for pollution source metal component-containing region and medium

Abstract

The embodiment of the invention discloses an external insulation configuration method and system for a pollution source metal component-containing region and a medium, and the method comprises the steps: determining the pollution flashover climbing degree of an insulator according to the metal particle component, the particle size and the mass ratio of the pollution on the surface of the insulator in a power transmission line in a target region; the target area is an area with a pollution source containing metal components; fitting a correction formula among the particle sizes, the mass proportions and the pollution flashover elevator climbing degree corresponding to different metal particle components; the pollution flashover elevator climbing degree of the insulator under the current working condition of the power transmission line is determined through a correction formula; the external insulation configuration model is determined according to the pollution flashover elevator climbing degree of the insulator under the current working condition, the number of insulator strings in the target area is configured according to the external insulation configuration model, the number of unnecessary insulator replacement and cleaning times is reduced, the operation and maintenance cost is reduced, and the economical efficiency of a power grid is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of external insulation configuration of power transmission lines, and in particular to an external insulation configuration method, system and medium for a pollution source area containing metal components. Background Art

[0002] The configuration of external insulation of transmission lines is related to whether the power system can operate safely and stably. Metal contamination can easily lead to failure of traditional external insulation design. Nearby power supply lines need to be shut down for insulator replacement or cleaning. Once an unplanned shutdown occurs, it is easy to cause a power outage. Therefore, targeted configuration of external insulation in areas with metal components in pollution sources has great theoretical research and engineering practice significance for preventing metal contamination from having an adverse effect on the electrical insulation of insulators and ensuring the safe and stable operation of the power grid.

[0003] In some smelting enterprise areas, the composition of the accumulated pollution in the power transmission and transformation equipment has changed significantly, that is, the pollution source contains obvious metal components, but the existing anti-pollution operation and maintenance technology cannot accurately prevent and control its risks. When the air humidity is high and rainy weather arrives, the pollutants accumulated in the external insulation equipment such as the transmission line insulators are moistened by water to form high-conductivity substances. The precipitation of metal particles aggravates the changes in their conductivity and electrical properties, resulting in frequent occurrence of electrical external insulation flashover accidents in the power grid system, threatening the safe and reliable operation of the power grid. Summary of the invention

[0004] Based on this, it is necessary to propose an insulation configuration method, system and medium outside the area where the pollution source contains metal components to address the above problems.

[0005] A method for configuring insulation outside a pollution source area containing metal components, the method comprising:

[0006] The pollution flashover creepage gradient of the insulator is determined based on the composition, particle size and mass ratio of metal particles in the surface contamination of the insulators in the transmission lines in the target area; the target area is the area where the pollution source contains metal components.

[0007] A correction formula is fitted between the particle size, mass ratio and pollution flashover creepage gradient corresponding to different metal particle components.

[0008] The pollution flashover creepage gradient of the insulator under the current working condition of the transmission line is determined by the correction formula.

[0009] An external insulation configuration model is determined by the pollution flashover creepage gradient of the insulators under the current working condition, and the number of insulator strings in the target area is configured according to the external insulation configuration model.

[0010] The flashover creepage gradient of the insulator is determined according to the composition, particle size and mass ratio of metal particles in the surface contamination of the insulators in the transmission lines in the target area; the target area is an area where the pollution source contains metal components, specifically including:

[0011] According to the composition, particle size and mass ratio of metal particles in the surface pollution of insulators in the transmission lines in the target area, typical metal-containing particle pollution with corresponding particle size and ratio is configured.

[0012] Apply test conditions to the test insulator to obtain the pollution flashover creepage gradient of the test insulator under the test conditions.

[0013] The surface of the test insulator is covered with pre-configured dirt, and the dirt has the same composition as the dirt on the surface of the insulator in the power transmission line in the target area.

[0014] The correction formula for fitting the particle size, mass ratio and pollution flashover creepage corresponding to different metal particle components specifically includes:

[0015] Fit the flashover creep gradient of metal-containing pollution with different metal particle composition, particle size and mass ratio to determine the correction formula;

[0016] The correction formula is:

[0017] Among them, E L0 is the gradient of pollution flashover creepage, A is the coefficient, a is the characteristic index of salt density, b is the characteristic index of ash density, ESDD is the equivalent salt density, NSDD is the ash density, K is the mass proportion of metal particles in pollution, ρ is the metal density, g / cm3, and D is the particle size of metal particles.

[0018] The step of determining an external insulation configuration model according to the pollution flashover creepage gradient of the insulators under the current working condition, and configuring the number of insulator strings in the target area according to the external insulation configuration model specifically includes:

[0019] The pollution flashover voltage of the transmission line under the current working condition is determined according to the pollution flashover creepage gradient of the insulator under the current working condition.

[0020] An external insulation configuration model is determined according to the pollution flashover voltage under the current operating condition.

[0021] The number of insulator strings in the target area is configured according to the external insulation configuration model.

[0022] The step of determining the external insulation configuration model according to the pollution flashover voltage under the current working condition specifically includes:

[0023] Determine the average pollution flashover voltage of each insulator according to the pollution flashover voltage under the current working condition;

[0024] The external insulation configuration model is determined according to the average pollution flashover voltage of each insulator and the maximum operating phase voltage.

[0025] The step of determining the external insulation configuration model according to the average pollution flashover voltage of each insulator and the maximum operating phase voltage specifically includes:

[0026] The external insulation configuration model is:

[0027]

[0028] Among them, U 50％ is the average pollution flashover voltage of each insulator, U m is the highest operating phase voltage, σ% is the standard deviation of the test results, N is the number of selected insulator strings, k1 is the safety margin factor, k2 is the correction factor for uneven distribution of contamination, and k3 is the difference in the probability of flashover between a single string and multiple strings in parallel.

[0029] Among them, the flashover creepage gradient of the insulator is determined according to the composition, particle size and mass ratio of metal particles in the surface contamination of the insulator in the transmission line in the target area; before the target area is an area where the pollution source contains metal components, it also specifically includes:

[0030] According to one or more algorithms of natural pollution accumulation method, simulated pollution accumulation method and simulation calculation pollution accumulation method, the composition, particle size and mass ratio of metal particles in the surface pollution of transmission line insulators in the area where the pollution source contains metal components are obtained.

[0031] Among them, the flashover creepage gradient of the insulator is determined according to the composition, particle size and mass ratio of metal particles in the surface contamination of the insulator in the transmission line in the target area; before the target area is an area where the pollution source contains metal components, it also specifically includes:

[0032] The composition of the metal particles is determined by using modern analytical techniques, including energy dispersive spectrometer, X-ray diffraction, and ion chromatography.

[0033] The particle size of metal particles was determined using a laser particle size analyzer.

[0034] A magnetic separation method or a chemical separation method is used to obtain a mass range of the metal particles, and a mass ratio of the metal particles is determined based on the mass range of the metal particles.

[0035] Wherein, the system comprises:

[0036] The pollution flashover creepage gradient determination module of the insulator is used to determine the pollution flashover creepage gradient of the insulator according to the metal particle composition, particle size and mass ratio in the surface contamination of the insulator in the transmission line in the target area; the target area is the area where the pollution source contains metal components.

[0037] The correction formula determination module is used to fit the correction formula between the particle size, mass ratio and pollution flashover creepage corresponding to the different metal particle components.

[0038] The pollution flashover creepage gradient determination module of the insulator under the current working condition is used to determine the pollution flashover creepage gradient of the insulator under the current working condition of the transmission line through the correction formula.

[0039] The external insulation configuration module is used to determine the external insulation configuration model according to the pollution flashover creepage gradient of the insulators under the current working condition, and configure the number of insulator strings in the target area according to the external insulation configuration model.

[0040] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor executes the steps of the method described above.

[0041] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above method.

[0042] The embodiments of the present invention have the following beneficial effects:

[0043] The present invention more accurately evaluates the risk of pollution flashover by analyzing in detail the composition, particle size and mass ratio of metal particles in the surface pollution of transmission line insulators in areas where pollution sources contain metal components. The pollution flashover creepage of the insulator is determined according to the composition, particle size and mass ratio of metal particles in the surface pollution of insulators in the transmission lines in the target area, and the target area is the area where the pollution source contains metal components. The correction formula between the particle size, mass ratio and pollution flashover creepage corresponding to different metal particle components is fitted to calculate the pollution flashover creepage of the insulator under the current working condition of the transmission line. The external insulation configuration model is determined by the pollution flashover creepage of the insulator under the current working condition of the transmission line. The external insulation configuration model reflects the electrical insulation performance of the insulator under different pollution conditions, provides guidance for the configuration and design of the number of insulator strings, and reasonably configures the number of insulator strings in areas where pollution sources contain metal components to reduce unnecessary replacement and cleaning times of insulators, reduce operation and maintenance costs, and improve the economy of the power grid. In addition, by increasing or decreasing the number of insulator strings, the electrical insulation performance of the insulators can be adjusted to adapt to different pollution conditions, thereby effectively preventing the occurrence of pollution flashover accidents, helping to reduce power outages and equipment damage caused by pollution flashover accidents, and improving the operational reliability of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] in:

[0046] Figure 1 A schematic flow chart of an embodiment of a method for configuring external insulation of a pollution source containing metal components provided by the present invention;

[0047] Figure 2 A schematic flow chart of another embodiment of a method for configuring insulation outside a pollution source containing metal components provided by the present invention;

[0048] Figure 3 A schematic structural diagram of an embodiment of an insulation configuration system for a pollution source containing metal components provided by the present invention;

[0049] Figure 4 A schematic structural diagram of an embodiment of the medium provided by the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] like Figure 1 As shown, Figure 1 A schematic diagram of a flow chart of an embodiment of a method for configuring an insulation outside a pollution source containing metal components provided by the present invention. A method for configuring an insulation outside a pollution source containing metal components, the method comprising:

[0052] S101: Determine the pollution flashover creepage gradient of insulators based on the composition, particle size and mass ratio of metal particles in the surface contamination of insulators in the transmission lines in the target area. The target area is the area where the pollution source contains metal components.

[0053] Exemplarily, the area where the pollution source contains metal components is taken as the target area, and according to the metal particle composition, particle size and mass ratio in the pollution on the surface of the transmission line insulators in the target area, typical metal particle pollution with corresponding particle size and ratio is configured; by applying test conditions to the test insulators, the pollution flashover creepage gradient of the test insulators under the test conditions is checked and recorded; wherein, the surface of the test insulator is covered with pre-configured pollution, and the pollution has the same composition as the pollution on the surface of the insulators in the transmission lines in the target area.

[0054] S102: Fitting the correction formula between the particle size, mass ratio and pollution flashover creep gradient corresponding to different metal particle components.

[0055] Exemplarily, the flashover creep gradient of metal-containing pollution with different metal particle compositions, particle sizes and mass ratios is fitted to determine a correction formula, which is:

[0056]

[0057] Among them, E L0 is the gradient of pollution flashover creepage, A is the coefficient, a is the characteristic index of salt density, b is the characteristic index of ash density, ESDD is the equivalent salt density, NSDD is the ash density, K is the mass proportion of metal particles in pollution, ρ is the metal density, g / cm3, and D is the particle size of metal particles.

[0058] S103: Determine the pollution flashover creepage of the insulator under the current working condition of the transmission line through a correction formula.

[0059] Exemplarily, the metal particle composition (for example, iron, copper, aluminum, etc.), particle size and mass ratio of the insulator surface contamination under the current operating condition of the transmission line are collected, and substituted into the correction formula for the pollution flashover creepage gradient of the metal component contamination to calculate the pollution flashover creepage gradient of the insulator under the current operating condition of the transmission line.

[0060] S104: Determine an external insulation configuration model based on the pollution flashover creepage gradient of the insulators under the current working condition, and configure the number of insulator strings in the target area according to the external insulation configuration model.

[0061] Exemplarily, the pollution flashover voltage of the transmission line under the current working condition is determined according to the pollution flashover creepage of the insulator under the current working condition; the average pollution flashover voltage of each insulator is determined according to the pollution flashover voltage under the current working condition; the external insulation configuration model is determined according to the average pollution flashover voltage of each insulator and the highest operating phase voltage. The external insulation configuration model is shown in the following formula:

[0062]

[0063] Among them, U 50％ is the average pollution flashover voltage of each insulator, U m is the highest operating phase voltage, σ% is the standard deviation of the test results, N is the number of selected insulator strings, k1 is the safety margin factor, k2 is the correction factor for uneven distribution of contamination, and k3 is the difference in the probability of flashover between a single string and multiple strings in parallel.

[0064] Furthermore, the number of insulator strings in the target area is configured according to the external insulation configuration model.

[0065] From the above description, it can be known that the present invention more accurately evaluates the risk of pollution flashover by analyzing in detail the metal particle composition, particle size and mass ratio in the surface pollution of transmission line insulators in areas where pollution sources contain metal components. The pollution flashover creepage of the insulator is determined according to the metal particle composition, particle size and mass ratio in the surface pollution of insulators in the transmission lines in the target area, and the target area is the area where the pollution source contains metal components. The correction formula between the particle size, mass ratio and pollution flashover creepage corresponding to different metal particle compositions is fitted to calculate the pollution flashover creepage of the insulator under the current working condition of the transmission line. The external insulation configuration model is determined by the pollution flashover creepage of the insulator under the current working condition of the transmission line, and the electrical insulation performance of the insulator under different pollution conditions is reflected by the external insulation configuration model, which provides guidance for the configuration and design of the number of insulator strings, and reasonably configures the number of insulator strings in areas where pollution sources contain metal components to reduce unnecessary replacement and cleaning times of insulators, reduce operation and maintenance costs, and improve the economy of the power grid. In addition, by increasing or decreasing the number of insulator strings, the electrical insulation performance of the insulators can be adjusted to adapt to different pollution conditions, thereby effectively preventing the occurrence of pollution flashover accidents, helping to reduce power outages and equipment damage caused by pollution flashover accidents, and improving the operational reliability of the power grid.

[0066] like Figure 2 As shown, Figure 2 A schematic flow chart of another embodiment of a method for configuring an insulation outside a pollution source containing metal components provided by the present invention. A method for configuring an insulation outside a pollution source containing metal components, the method comprising:

[0067] S201: Based on the metal particle composition, particle size and mass ratio of the insulator surface pollution in the transmission lines in the target area, typical metal-containing particle pollution with corresponding particle size and ratio is configured.

[0068] Exemplarily, first determine the composition, particle size and mass ratio of metal particles in the surface contamination of transmission line insulators in areas where the pollution source contains metal components. Specifically, the composition, particle size and mass ratio of metal particles in the surface contamination of transmission line insulators in areas where the pollution source contains metal components can be obtained according to one or more algorithms in the natural contamination method, the simulated contamination method or the simulated calculation contamination method. The composition of metal particles can also be determined by modern analytical techniques, including energy spectrometer, X-ray diffraction, ion chromatograph; laser particle size analyzer is used to determine the particle size of metal particles; magnetic separation method or chemical separation method is used to obtain the mass range of metal particles, and the mass ratio of metal particles is determined by the mass range of metal particles.

[0069] Furthermore, according to the metal particle composition, particle size and mass ratio in the surface pollution of transmission line insulators in the area where the pollution source contains metal components, typical metal-containing particle pollution with corresponding particle size and ratio is configured.

[0070] S202: applying test conditions to the test insulator to obtain the pollution flashover creepage gradient of the test insulator under the test conditions; wherein the surface of the test insulator is covered with pre-configured pollution, and the pollution has the same composition as the pollution on the surface of the insulator in the transmission line in the target area.

[0071] Exemplarily, the surface of the test insulator is covered with pre-configured pollution, which has the same composition as the pollution on the surface of the insulators in the transmission lines in the target area, simulating the pollution accumulation under actual working conditions. By applying voltage and other test conditions, the pollution flashover creepage gradient of the test insulator is observed and recorded.

[0072] S203: Fitting the correction formula between the particle size, mass ratio and pollution flashover creep gradient corresponding to different metal particle components.

[0073] S204: Determine the pollution flashover creepage of the insulator under the current working condition of the transmission line through a correction formula.

[0074] It should be noted that steps S203-S204 are Figure 1 This has been discussed in detail in the implementation scenario shown and will not be repeated here.

[0075] S205: Determine the pollution flashover voltage of the transmission line under the current working condition according to the pollution flashover creepage gradient of the insulator under the current working condition.

[0076] Exemplarily, the pollution flashover voltage under the current operating condition is determined according to the pollution flashover creepage gradient of the insulator under the current operating condition of the transmission line.

[0077] S206: Determine the average pollution flashover voltage of each insulator according to the pollution flashover voltage under the current working condition.

[0078] Exemplarily, first, the flashover voltage of the insulator under the same operating conditions is calculated based on the pollution flashover creepage gradient of the insulator under the current transmission line operating conditions.

[0079] Specifically, the insulators used in this area are XP-160 porcelain insulators, which contain iron as the metal component, with a mass proportion K of 15%, a particle size D of 25μm, and a metal density ρ of 7.8g / cm3. According to the test, A is 23.02, a is 0.2825, b is 0.0438, and the pollution level is c, so the ESDD is 0.03mg / cm2 and the NSDD is 0.18mg / cm2. Therefore, it is calculated that the pollution flashover creepage gradient in this area is 63.9kV / m, and the flashover voltage of a single XP-160 porcelain insulator is 19.5kV.

[0080] Furthermore, the average pollution flashover voltage of each insulator is determined according to the pollution flashover voltage under the current transmission line operating condition.

[0081] S207: Determine an external insulation configuration model according to the average pollution flashover voltage of each insulator and the maximum operating phase voltage.

[0082] Exemplarily, the external insulation configuration model is determined according to the average pollution flashover voltage of each insulator and the highest operating phase voltage, wherein the principle of the external insulation configuration is: to make the withstand voltage of the insulator greater than the highest operating phase voltage U m , the calculation formula is as follows

[0083]

[0084] Then, the external insulation configuration model is as follows:

[0085]

[0086] Among them, U 50％ is the average pollution flashover voltage of each insulator, U w is the withstand voltage of the insulator, U m is the highest operating phase voltage, σ% is the standard deviation of the test results, N is the number of selected insulator strings, k1 is the safety margin factor, k2 is the correction factor for uneven distribution of contamination, and k3 is the difference in the probability of flashover between a single string and multiple strings in parallel.

[0087] S208: Determine an external insulation configuration model based on the pollution flashover creepage gradient of the insulators under the current working condition, and configure the number of insulator strings in the target area according to the external insulation configuration model.

[0088] like Figure 3 As shown, Figure 3 The present invention provides a schematic diagram of an embodiment of an insulation configuration system for a pollution source containing metal components. A system 10 for insulation configuration for a pollution source containing metal components, the system comprising:

[0089] The insulator pollution flashover creepage determination module 11 is used to determine the insulator pollution flashover creepage according to the metal particle composition, particle size and mass ratio in the insulator surface contamination in the transmission line in the target area; the target area is the area where the pollution source contains metal components.

[0090] The correction formula determination module 12 is used to fit the correction formula between the particle size, mass ratio and pollution flashover creepage gradient corresponding to different metal particle components.

[0091] The pollution flashover creepage gradient determining module 13 of the insulator under the current working condition is used to determine the pollution flashover creepage gradient of the insulator under the current working condition of the transmission line through a correction formula.

[0092] The external insulation configuration module 14 is used to determine the external insulation configuration model according to the pollution flashover creepage gradient of the insulators under the current working condition, and configure the number of insulator strings in the target area according to the external insulation configuration model.

[0093] Exemplarily, in the pollution flashover creepage determination module 11 of the insulator, typical metal-containing particle contamination of corresponding particle size and ratio is configured according to the metal particle composition, particle size and mass ratio in the contamination on the surface of the insulator in the transmission line in the target area. Test conditions are applied to the test insulator to obtain the pollution flashover creepage of the test insulator under the test conditions; wherein, the surface of the test insulator is covered with pre-configured contamination, and the contamination has the same composition as the contamination on the surface of the insulator in the transmission line in the target area. In the correction formula determination module 12, the correction formula between the particle size, mass ratio and pollution flashover creepage corresponding to different metal particle compositions is fitted. In the pollution flashover creepage determination module 13 of the insulator under the current working condition, the pollution flashover creepage of the insulator under the current working condition of the transmission line is determined by the correction formula. In the external insulation configuration module 14, the pollution flashover voltage of the transmission line under the current working condition is determined according to the pollution flashover creepage gradient of the insulator under the current working condition; the external insulation configuration model is determined according to the pollution flashover voltage under the current working condition; and the number of insulator strings in the target area is configured according to the external insulation configuration model.

[0094] like Figure 4 As shown, Figure 4 The structure diagram of an embodiment of the medium provided by the present invention is shown in FIG. The medium 20 stores at least one computer program 21, which is executed by a processor to implement the following Figure 1 , Figure 2 In one embodiment, the medium 20 may be a storage chip, a hard disk, a mobile hard disk, a USB flash drive, an optical disk, or other readable and writable storage tools, or a server, etc.

[0095] The above describes specific embodiments of the present specification, and other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily have to be performed in the specific order or sequential order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0096] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer-readable storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0097] The apparatus, device, non-volatile computer-readable storage medium and method provided in the embodiments of this specification correspond to each other, and therefore, the apparatus, device, and non-volatile computer storage medium also have similar beneficial technical effects as the corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the corresponding apparatus, device, and non-volatile computer storage medium will not be repeated here.

[0098] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0099] For the convenience of description, the above device is described by being divided into various units according to their functions and described separately. Of course, when implementing this specification, the functions of each unit can be implemented in one or more software and / or hardware. It should be understood by those skilled in the art that this specification embodiment can be provided as a method, system, or computer program product. Therefore, this specification embodiment can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this specification embodiment can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0100] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0101] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0102] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for configuring insulation outside a pollution source area containing metal components, characterized in that: The method comprises: Determine the pollution flashover creepage gradient of the insulator according to the composition, particle size and mass ratio of metal particles in the surface contamination of the insulators in the transmission lines in the target area; the target area is the area where the pollution source contains metal components; Fitting the correction formula between the particle size, mass ratio and the flashover creepage gradient corresponding to the different metal particle components; Determine the pollution flashover creepage of the insulator under the current working condition of the transmission line by using the correction formula; An external insulation configuration model is determined by the pollution flashover creepage gradient of the insulators under the current working condition, and the number of insulator strings in the target area is configured according to the external insulation configuration model.

2. The method for configuring external insulation of a pollution source containing metal components according to claim 1, characterized in that: Determining the pollution flashover creepage of the insulator according to the composition, particle size and mass ratio of metal particles in the surface contamination of the insulator in the transmission line in the target area; The target areas are areas where the pollution sources contain metal components, including: According to the metal particle composition, particle size and mass ratio in the surface pollution of insulators in the transmission lines in the target area, typical metal particle pollution with corresponding particle size and ratio is configured; Applying test conditions to the test insulator to obtain the pollution flashover creepage gradient of the test insulator under the test conditions; The surface of the test insulator is covered with pre-configured dirt, and the dirt has the same composition as the dirt on the surface of the insulator in the power transmission line in the target area.

3. The method for configuring external insulation of a pollution source containing metal components according to claim 2, characterized in that: The correction formula for fitting the particle size, mass ratio and pollution flashover creepage corresponding to different metal particle components specifically includes: Fit the flashover creep gradient of metal-containing pollution with different metal particle composition, particle size and mass ratio to determine the correction formula; The correction formula is: Among them, E L0 is the gradient of pollution flashover creepage, A is the coefficient, a is the characteristic index of salt density, b is the characteristic index of ash density, ESDD is the equivalent salt density, NSDD is the ash density, K is the mass proportion of metal particles in pollution, ρ is the metal density, g / cm3, and D is the particle size of metal particles.

4. The method for configuring external insulation of a pollution source containing metal components according to claim 2, characterized in that: The step of determining an external insulation configuration model by the pollution flashover creepage gradient of the insulators under the current working condition, and configuring the number of insulator strings in the target area according to the external insulation configuration model specifically includes: Determining the pollution flashover voltage of the transmission line under the current working condition according to the pollution flashover creepage gradient of the insulator under the current working condition; Determine an external insulation configuration model according to the pollution flashover voltage under the current working condition; The number of insulator strings in the target area is configured according to the external insulation configuration model.

5. The method for configuring external insulation of a pollution source containing metal components according to claim 4, characterized in that: The determining of the external insulation configuration model according to the pollution flashover voltage under the current working condition specifically includes: Determine the average pollution flashover voltage of each insulator according to the pollution flashover voltage under the current working condition; The external insulation configuration model is determined according to the average pollution flashover voltage of each insulator and the maximum operating phase voltage.

6. The method for configuring external insulation of a pollution source containing metal components according to claim 5, characterized in that: Determining the external insulation configuration model according to the average pollution flashover voltage of each insulator and the highest operating phase voltage specifically includes: The external insulation configuration model is: Among them, U 50％ is the average pollution flashover voltage of each insulator, U m is the highest operating phase voltage, σ% is the standard deviation of the test results, N is the number of selected insulator strings, k1 is the safety margin factor, k2 is the correction factor for uneven distribution of contamination, and k3 is the difference in the probability of flashover between a single string and multiple strings in parallel.

7. The method for configuring external insulation of a pollution source containing metal components according to claim 1, characterized in that: Determining the pollution flashover creepage of the insulator according to the composition, particle size and mass ratio of metal particles in the surface contamination of the insulator in the transmission line in the target area; The target areas are areas where the pollution sources contain metal components, and specifically include: According to one or more algorithms of natural pollution accumulation method, simulated pollution accumulation method and simulation calculation pollution accumulation method, the composition, particle size and mass ratio of metal particles in the surface pollution of transmission line insulators in the area where the pollution source contains metal components are obtained.

8. The method for configuring external insulation of a pollution source containing metal components according to claim 1, characterized in that: Determining the pollution flashover creepage of the insulator according to the composition, particle size and mass ratio of metal particles in the surface contamination of the insulator in the transmission line in the target area; The target areas are areas where the pollution sources contain metal components, and specifically include: Using modern analytical techniques to determine the composition of metal particles, the modern analytical techniques include energy dispersive spectrometer, X-ray diffraction, and ion chromatography; The particle size of metal particles was determined using a laser particle size analyzer; A magnetic separation method or a chemical separation method is used to obtain the mass range of the metal particles, and the mass ratio of the metal particles is determined according to the mass range of the metal particles.

9. An insulation configuration system outside the area containing metal components of pollution sources, characterized in that: The system comprises: The pollution flashover creepage determination module of the insulator is used to determine the pollution flashover creepage of the insulator according to the metal particle composition, particle size and mass ratio in the surface contamination of the insulator in the transmission line in the target area; the target area is the area where the pollution source contains metal components; A correction formula determination module is used to fit the correction formula between the particle size, mass ratio and pollution flashover creepage corresponding to the different metal particulate components; A pollution flashover creepage gradient determination module for insulators under current working conditions, used to determine the pollution flashover creepage gradient of insulators under current working conditions of the transmission line through the correction formula; The external insulation configuration module is used to determine the external insulation configuration model according to the pollution flashover creepage gradient of the insulators under the current working condition, and configure the number of insulator strings in the target area according to the external insulation configuration model.

10. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 8.

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