Method for determining protection range of equal-height double-branch plasma lightning arrester based on charge accumulation and lightning elimination principle

Abstract

The invention relates to the technical field of power system protection, in particular to a method for determining the protection range of an equal-height double-branch plasma lightning arrester based on a load accumulation and lightning elimination principle. According to the range of air field intensity distortion in the PLP working process, the outer side protection range of the double-branch equal-height PLP is approximately equivalent to a hyperbola envelope range, the inner side combined protection range is approximately equivalent to an asymptote envelope range, and the phenomenon that the protection effect can be improved during double-branch equal-height PLP combined protection is considered. An inner side protection range is determined by adopting a protection range equivalent model after the inner side protection angle of the double-branch equal-height PLP is expanded, and a lightning protection range formed by the double-branch equal-height PLP and the inner side protection angle is accurately calculated by fully utilizing the protection capability of the PLP. The objective of the invention is to solve the problem of how to calculate the protection range of double equal-height plasma lightning arresters.

Description

Technical Field

[0001] The present application relates to the technical field of power system protection, and particularly relates to a method for determining the protection range of an equal-height double-branch plasma lightning arrester based on the principle of charge aggregation and lightning elimination. Background Art

[0002] The plasma lightning arrester (PLP) is a lightning protection device that has been widely used in recent years. Its protection angle is..., and can even reach more than... in high-altitude areas, achieving a protection radius of more than 10 to 14 times the needle tip height H of the passive plasma lightning protection system. Its principle is to ionize the air around the device to generate a high concentration of ions to neutralize the cloud charge and its induced charge on the ground, making the equivalent electrode plate between the thundercloud and the ground a leaky bad capacitor that cannot be fully charged. Different from the traditional lightning protection device that leads lightning into the ground, the PLP device will not generate induced overvoltage. In the distorted electric field range formed within its protection angle, since the generated ions will diverge upward to cancel the negative (positive) charge developed by the thundercloud electric field ionization downward, and diverge downward to cancel the positive (negative) charge developed by the ionization of the ground or the protected object upward, the field strength within this range is weakened, effectively inhibiting the formation and development of conductance and thus inhibiting the lightning strike caused by it.

[0003] Traditional protection range calculation methods such as the rolling sphere method and the broken line method are mainly applied to the calculation of the protection range of lightning rods or lightning wires. Their calculation is based on the lightning-leading principle of lightning rods, and the protection range is calculated through the final jump distance of the lightning leader development, that is, the strike distance.

[0004] However, since the PLP does not have a lightning-leading effect, the protection range calculation of traditional lightning protection devices is not fully applicable to the PLP. In actual working conditions, the farther away from the PLP, the lower its protection ability. The farther away along the protection angle, that is, the asymptote direction, the worse its protection ability. It does not change linearly all the time. When using the traditional method to calculate the protection range, the protected object at the edge of the protection range still has the risk of being struck by lightning, and there is a problem of insufficient calculation accuracy. Summary of the Invention

[0005] The main purpose of the present application is to provide a method for determining the protection range of an equal-height double-branch plasma lightning arrester based on the principle of charge aggregation and lightning elimination, aiming to solve the problem of how to calculate the protection range of a double-branch equal-height plasma lightning arrester.

[0006] To achieve the above purpose, a method for determining the protection range of an equal-height double-branch plasma lightning arrester based on the principle of charge aggregation and lightning elimination provided by the present application includes:

[0007] S10. Measure the installation height, outer protection angle, inner protection angle of the plasma lightning arrester, and the distance between two plasma lightning arresters;

[0008] S20. Calculate the tangent value of the complementary angle of the outer protection angle. According to the installation height and the tangent value of the complementary angle of the outer protection angle, calculate the protection radius at the target outer height and the maximum ground protection radius on the outside, where the calculation expression for the protection radius at the target outer height is as follows:

[0009]

[0010] The calculation expression for the maximum ground protection radius on the outside is as follows:

[0011]

[0012] In the formula, is the protection radius at the target outer height , is the installation height of the plasma lightning arrester, m i is the complementary angle of the outer protection angle of the plasma lightning arrester of the tangent value , , ;

[0013] S30. Calculate the tangent value of the complementary angle of the inner protection angle. According to the installation height, the distance, and the tangent value of the complementary angle of the inner protection angle, calculate the protection radius at the target inner lowest protection height. The calculation expression for the protection radius at the target inner lowest protection height is as follows:

[0014]

[0015]

[0016]

[0017] In the formula, is the cross-section height at the target inner lowest point of the protection radius, is the ground protection width at the lowest point of the plasma lightning arrester, is the lowest protection height of the plasma lightning arrester, is the installation height of the plasma lightning arrester, D is the distance between two plasma lightning arresters; u i is the complementary angle of the outer protection angle of the plasma lightning arrester of the tangent value ;

[0018] S40, determining the protection range of the two plasma lightning arresters according to the protection radius at the outer height of the target, the outer maximum ground protection radius, the protection radius at the inner minimum protection height of the target, the ground protection width at the lowest point of the plasma lightning arrester and the minimum protection height of the plasma lightning arrester.

[0019] Optionally, the derivation process of the protection radius at the target outer height includes:

[0020] S21, establish the equivalent hyperbolic equation and asymptotic model of the double-branch equal-height plasma lightning arrester S i and Li :

[0021]

[0022]

[0023]

[0024] In the formula, a i 、b i 、c i The hyperbolic equations S i The real semi-axis length, the imaginary semi-axis length, and the distance from the focus to the origin;

[0025] S22, assuming that the outer protection angles of two equal-height plasma lightning arresters are , installation height of two equal height plasma lightning arresters , let the complementary angle of the protection angle is equal to the slope angle of the hyperbola asymptote, that is , (i=1,2), let the focal distance c i Equal to PLP installation height ,get:

[0026]

[0027]

[0028] make , combining the above formula, we get:

[0029]

[0030] S23, order , substitute into the equivalent hyperbolic equation S i ,get:

[0031]

[0032] S24, let the outer height be h ixThe protection range R at ix， Let , then we have:

[0033]

[0034] Let , and after arrangement, we get:

[0035] .

[0036] Optionally, the derivation process of the protection radius at the lowest inner protection height includes:

[0037] S31. Assume that when the distance between two plasma lightning arresters with the same height is D, the lowest protection height is h0, and the protection angle , , , and at this time, there is an asymptote equation , at and , there is the lowest protection height h 0 :

[0038]

[0039] S32. Take the maximum ground protection radius as 14 times the installation height, that is , and calculate the ground protection width d at the lowest point according to the maximum ground protection radius determined by the protection angle size and the distance D at both ends 0 :

[0040]

[0041] S33. Equivalent the O - O' section at the lowest point to an isosceles triangle, and calculate the minimum protection width b corresponding to the position with height h 0 and the lowest protection height h 0 on the O - O' section 0x : x :

[0042] .

[0043] Optionally, the distance D between two plasma lightning arresters is less than 2 times the maximum ground protection radius.

[0044] In addition, to achieve the above object, the present application also provides a lightning protection device. The lightning protection device includes at least two plasma lightning arresters arranged with the same height. When calculating the combined protection range formed by the two plasma lightning arresters, the protection range determination method of the double - branch plasma lightning arrester with the same height based on the charge - gathering lightning elimination principle as described above is adopted.

[0045] In addition, to achieve the above object, the present application further provides a power protection system, which includes: a memory, a processor, and a protection range determination program of an equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination stored on the memory and operable on the processor. When the protection range determination program of the equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination is executed by the processor, the steps of the protection range determination method of the equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination as described in any one of the above are implemented.

[0046] In addition, to achieve the above object, the present application further provides a computer-readable storage medium, on which a protection range determination program of an equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination is stored. When the protection range determination program of the equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination is executed by a processor, the steps of the protection range determination method of the equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination as described in any one of the above are implemented.

[0047] The present application at least has the following beneficial effects:

[0048] By establishing an equivalent hyperbola model for the charge elimination principle and its charge elimination range in the thundercloud and ground electric field during the actual operation of the PLP, it is more in line with the actual model of the PLP protection range. It can effectively utilize the protection ability of the PLP itself to calculate the protection range. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the protection range of a single-branch plasma lightning arrester involved in an embodiment of the present application;

[0050] Figure 2 It is a schematic diagram of an equivalent hyperbola model of the protection range of a double-branch equal-height PLP involved in an embodiment of the present application;

[0051] Figure 3 It is a schematic flowchart of a method for determining the protection range of an equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination involved in an embodiment of the present application;

[0052] Figure 4 It is for the minimum protection range diagram at the height of h 0x at the O - O' section involved in an embodiment of the present application;

[0053] Figure 5 It is a schematic diagram of the architecture of the hardware operating environment of a power protection system involved in an embodiment of the present application.

[0054] The realization, functional characteristics, and advantages of the object of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] To better understand the above technical solution, the exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0056] First Embodiment

[0057] Referring to Figure 1 the schematic diagram of the protection range of a single-plasma lightning arrester shown. For a single PLP, by distorting the electric field shape of its surface "needle tip array", the electric field intensity around it is increased to form strong ionization. The generated ions will diverge upward respectively to cancel the negative (positive) charges ionized by the thundercloud electric field, and diverge downward to cancel the positive (negative) charges ionized by the ground or the protected object. The distorted shape of the electric field and the charge dissipation range can be approximately equivalent to the curve envelope range of the hyperbola equation, and it is a structure that is approximately symmetric up and down with respect to the horizontal plane where the vertex of the PLP is located.

[0058] For the protection range of two equal-height PLPs, refer to Figure 2 the schematic diagram of the equivalent hyperbola model of the protection range of two equal-height PLPs shown, taking the direction in Figure 2 as an example. Its protection range is divided into the outer protection range on the left side of PLP#1 and the right side of PLP#2, and the inner protection range between PLP#1 and PLP#2.

[0059] Referring to Figure 3 , in this embodiment, the method for determining the protection range of the equal-height two-plasma lightning arresters based on the principle of charge accumulation and lightning elimination includes the following steps:

[0060] S10. Measure the installation height, outer protection angle, inner protection angle of the plasma lightning arrester, and the distance between the two plasma lightning arresters;

[0061] In this embodiment, measure the installation height, outer protection angle, inner protection angle of the plasma lightning arrester, and the distance between two equal-height plasma lightning arresters.

[0062] The installation height and the outer protection angle are used to calculate the protection radius outside the two plasma clustering devices, and the installation height, the inner protection angle, and the distance are used to calculate the protection radius inside the plasma clustering device.

[0063] S20. Calculate the tangent value of the complementary angle of the outer protection angle, and calculate the protection radius at the target outer height according to the installation height and the tangent value of the complementary angle of the outer protection angle. The calculation expression of the protection radius at the target outer height is as follows:

[0064]

[0065] In the formula, is the protection radius at the target outer height , is the installation height of the plasma lightning arrester, m i is the complementary angle of the outer protection angle of the plasma lightning arrester tangent value of , , ;

[0066] In this embodiment, for the calculation of the outer protection range of the PLP, the protection radius of the PLP at different heights is different, and the expression for calculating the protection radius of the PLP at different heights is derived from the equivalent hyperbola equation.

[0067] The specific derivation process is as follows:

[0068] First, taking the top of the #1 PLP pole tower as the coordinate origin, a plane rectangular coordinate system is established.

[0069] Furthermore, according to the "charge-accumulating and lightning-eliminating" effect range of the PLP, an equivalent hyperbola equation and its asymptote model are established, and the #1 mathematical model is as follows:

[0070] (1)

[0071] (2)

[0072] (3)

[0073] Assume that the horizontal distance between two PLP pole towers is D, then the #2 pole tower mathematical model is as follows:

[0074] (4)

[0075] (5)

[0076] (6)

[0077] In the formula, a i , b i , c i are respectively the real semi-axis length, the imaginary semi-axis length, and the distance from the focus to the origin of the hyperbola equation S i . (i = 1, 2). And x L2 satisfies the following formula:

[0078] (7)

[0079] (8)

[0080] Furthermore, let the outer protection angles of the double-branch equal-height PLP both be , and let the complementary angle of the protection angle be equal to the slope angle of the hyperbola asymptote, that is , (i = 1, 2), then there are the following relational expressions:

[0081]

[0082] (9)

[0083] Furthermore, let the installation height of the double-branch equal-height PLP, and let , that is, the focal distance is equal to the installation height of the PLP, then from equations (3) and (6), we get:

[0084] (10)

[0085] Furthermore, by combining equations (2) and (3) or (5) and (6), and letting , then the installation height can be calculated as when calculating a i , b i to obtain:

[0086]

[0087]

[0088] The solution is

[0089] (11)

[0090] Furthermore, let , substitute equation (11) back into equations (1) and (4) to obtain a new hyperbola equation (when i = 2, x 2 = x 1 - D):

[0091] (12)

[0092] Furthermore, calculate the outer protection range of the double-branch equal-height PLP. According to the properties of the hyperbola, the maximum protection radius R i on the outer side of the ground is equal to half of the latus rectum:

[0093] The latus rectum formula is:

[0094] (13)

[0095] The maximum protection radius R i is:

[0096] (14)

[0097] Or further, there is:

[0098] (15)

[0099] Further, calculate the protection range R at the outer height h ix at, and let ix , substitute it into Equation (11), and calculate to obtain a new hyperbola equation:

[0100] (16)

[0101]

[0102]

[0103] Finally, the obtained expression is as follows:

[0104] (17)

[0105] S30. Calculate the tangent value of the complementary angle of the inner protection angle. According to the installation height, the spacing, and the tangent value of the complementary angle of the inner protection angle, calculate the protection radius at the target inner lowest protection height. The calculation expression of the protection radius at the target inner lowest protection height is as follows:

[0106]

[0107]

[0108]

[0109] In the formula, is the cross-sectional height at the target inner lowest point at, and the protection radius is the ground protection width at the lowest point of the plasma lightning arrester, is the lowest protection height of the plasma lightning arrester, is the installation height of the plasma lightning arrester, D is the spacing between two plasma lightning arresters; u i is the complementary angle of the outer protection angle of the plasma lightning arrester tangent value ;

[0110] In this embodiment, for the inner protection range between two equal-height PLPs, the protection radii at different heights are also inconsistent. The specific derivation process is as follows:​

[0111] First, set the inner protection angle to calculate the inner combined protection range using the equivalent asymptote equation, and the minimum protection height h when the two PLPs are separated by a distance D 0 :

[0112] At this time, there is , and , and at this time there is an asymptote equation , at and , there is a minimum protection height h 0 :

[0113] (18)

[0114] Furthermore, calculate the ground protection width d at the lowest point according to the maximum ground protection radius determined by the protection angle size and the distance D at both ends 0 :

[0115] The maximum ground protection radius determined by the protection angle size is equal to 10 to 14 times or more of the installation height. Considering the improvement of the combined protection effect and the reservation of a certain margin, the maximum ground protection radius is taken as 14 times the installation height:

[0116] (19)

[0117] (20)

[0118] At the same time, it can be obtained that the maximum combined protection spacing D of the double - branch equal - height PLP should satisfy:

[0119] (21)

[0120] Finally, calculate the minimum protection width b corresponding to the position with a height of h on the O - O' section at the lowest point 0x , the O - O' section can be approximately equivalent to an isosceles triangle, and the protection width at the position of h x can be calculated by the geometric ratio change of the ground protection width and the height of h 0x , and the final expression is obtained: 0 :

[0121] (22)

[0122] Optionally, the value of the inner protection angle can be .

[0123] S40. Determine the protection range of the two plasma lightning arresters based on the protection radius at the target outer height, the protection radius at the target inner lowest protection height, the ground protection width at the lowest point of the plasma lightning arrester, and the lowest protection height of the plasma lightning arrester.

[0124] In this embodiment, the protection radius at the target outer height is calculated based on the above formula. and the protection radius at the cross-section height at the lowest point inside the target. The ground protection width at the lowest point of the plasma lightning arrester. and the lowest protection height of the plasma lightning arrester. After that, the protection range of the plasma lightning arrester is determined based on the four parameters.

[0125] Specifically, when the object to be protected is within the outer protection range of the PLP, taking any one PLP as the origin, using the height of the object to be protected as the target outer height, calculate the corresponding protection radius at the target outer height. , and determine whether the object to be protected is completely within the area similar to a "truncated pyramid" formed by the maximum ground radius of the PLP and the corresponding protection radius at the target outer height. If so, it is determined that the object to be protected is completely within the protection range.

[0126] When the object to be protected is within the inner protection range between two equal-height PLPs, refer to the Figure 4 schematic diagram of the minimum protection range at the height of h shown in the O—O’ cross-section. 0x Take the height of the object to be protected as the target inner height, and determine whether the target inner height is lower than the lowest protection height. , whether it is within the ground protection width at the lowest point. and whether it is within the calculated protection radius at the target inner height. If so, it is determined that the object to be protected is completely within the protection range.

[0127] Exemplarily, in a specific embodiment, assume the outer protection angle is , then , the installation height is taken as h i = 20m, substituting into the above formula, we can solve , , then m i = 0.105, u i = 0.07.

[0128] Substitute the calculated a i , b i into the above formula (12) to calculate the maximum ground protection radius R of the two equal-height PLPs on the outside. i= 189.7 m. Compared with the calculated installation height of 200 m - 280 m where the original outer R is 10 - 14 times or more, a margin of approximately 5.15% - 32.25% is retained.

[0129] Furthermore, let the distance D between two equal-height PLPs be 450 m, satisfying , substitute u i , D into Equation (18), and calculate the height h at the lowest point of combined protection to be 0 = 4.25 m, and calculate d 0 = 166.66 m.

[0130] Take the height h on the O - O' section as 0x = 2 m, substitute h 0 , d 0 into Equation (22), and calculate the minimum protection width b corresponding to the height at the lowest point on the O - O' section to be 0x b x = 88.23 m.

[0131] In the technical solution provided in this embodiment, according to the range of air field strength distortion during the operation of the PLP, the outer protection range of two equal-height PLPs is approximately equivalent to the hyperbola envelope range, while the inner combined protection range is approximately equivalent to the asymptote envelope range. Considering the phenomenon that the combined protection of two equal-height PLPs can improve the protection effect, using the equivalent model of the protection range after expanding the inner protection angle of two equal-height PLPs to determine the inner protection range can make full use of the self-protection ability of the PLP and expand the protection range.

[0132] In addition, as an implementation solution, the embodiment of the present application also provides a lightning protection device, which includes at least two equal-height plasma lightning rejectors. When calculating the combined protection range formed by the two plasma lightning rejectors, the protection range determination method of equal-height double-branch plasma lightning rejectors based on the principle of charge aggregation and lightning elimination as described above is adopted.

[0133] In addition, as an implementation solution, Figure 5 is a schematic diagram of the architecture of the hardware operating environment of the power protection system involved in the embodiment of the present application.

[0134] As Figure 5As shown, the power protection system may include: a processor 1001, such as a CPU, a memory 1005, a user interface 1003, a network interface 1004, and a communication bus 1002. Among them, the communication bus 1002 is used to implement the connection and communication between these components. The user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard). Optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0135] Those skilled in the art can understand that Figure 5 the power protection system architecture shown in does not constitute a limitation on the power protection system, and may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0136] As Figure 5 shown, in the memory 1005 as a storage medium, there may be included an operating system, a network communication module, a user interface module, and a program for determining the protection range of an equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination. Among them, the operating system is a program for managing and controlling the hardware and software resources of the power protection system, and for running the program for determining the protection range of the equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination and other software or programs.

[0137] In Figure 5 the power protection system shown, the user interface 1003 is mainly used to connect to a terminal and perform data communication with the terminal; the network interface 1004 is mainly used to connect to a background server and perform data communication with the background server; the processor 1001 may be used to call the program for determining the protection range of the equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination stored in the memory 1005.

[0138] In this embodiment, the power protection system includes: a memory 1005, a processor 1001, and a program for determining the protection range of an equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination stored in the memory and executable on the processor, where:

[0139] When the processor 1001 calls the program for determining the protection range of the equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination stored in the memory 1005, the following operations are performed:

[0140] S10. Measure the installation height, outer protection angle, inner protection angle of the plasma lightning arrester, and the distance between two plasma lightning arresters;

[0141] S20. Calculate the tangent value of the complementary angle of the outer protection angle. According to the installation height and the tangent value of the complementary angle of the outer protection angle, calculate the protection radius at the target outer height and the maximum ground protection radius on the outside, where the calculation expression for the protection radius at the target outer height is as follows:

[0142]

[0143] The calculation expression for the maximum ground protection radius on the outside is as follows:

[0144]

[0145] In the formula, is the protection radius at the target outer height ; is the installation height of the plasma lightning arrester, m i is the complementary angle of the outer protection angle of the plasma lightning arrester of the tangent value , , ;

[0146] S30. Calculate the tangent value of the complementary angle of the inner protection angle. According to the installation height, the distance, and the tangent value of the complementary angle of the inner protection angle, calculate the protection radius at the target inner lowest protection height. The calculation expression for the protection radius at the target inner lowest protection height is as follows:

[0147]

[0148]

[0149]

[0150] In the formula, is the cross-sectional height at the target inner lowest point of the protection radius, is the ground protection width at the lowest point of the plasma lightning arrester, is the lowest protection height of the plasma lightning arrester, is the installation height of the plasma lightning arrester, D is the distance between two plasma lightning arresters; u i is the complementary angle of the outer protection angle of the plasma lightning arrester of the tangent value ;

[0151] S40. Determine the protection ranges of the two plasma lightning arresters according to the protection radius at the target outer height, the maximum ground protection radius on the outside, the protection radius at the target inner lowest protection height, the ground protection width at the lowest point of the plasma lightning arrester, and the lowest protection height of the plasma lightning arrester.

[0152] When the processor 1001 calls the protection range determination program of the equal-height double-branch plasma lightning arrester based on the principle of charge-accumulation lightning elimination stored in the memory 1005, the following operations are performed:

[0153] S21. Establish the equivalent hyperbola equation of the double-branch equal-height plasma lightning arrester and its asymptote model S i and y Li :

[0154]

[0155]

[0156]

[0157] In the formula, a i , b i , c i are respectively the real semi-axis length, the imaginary semi-axis length, and the distance from the focus to the origin of the hyperbola equation S i ;

[0158] S22. Assume that the outer protection angles of the two equal-height plasma lightning arresters are both , the installation height of the two equal-height plasma lightning arresters is , let the complementary angle of the protection angle be equal to the slope angle of the hyperbola asymptote, that is , (i = 1, 2), let the focal distance c i be equal to the PLP installation height , and the following is obtained:

[0159]

[0160]

[0161] Let , and by combining the above formula, the following is obtained:

[0162]

[0163] S23. Let , substitute it into the equivalent hyperbola equation S i , and the following is obtained:

[0164]

[0165] S24. Let the outer height be h ix The protection range R at ix， Let , then there is:

[0166]

[0167] Let , and after arrangement, we get:

[0168] .

[0169] S31. Let the minimum protection height be h0 when two plasma lightning arresters of the same height are separated by a distance D, and the protection angle , , , and at this time, there is an asymptote equation , at and , there is a minimum protection height h 0 :

[0170]

[0171] S32. Take the maximum ground protection radius as 14 times the installation height, that is , calculate the ground protection width d at the lowest point according to the maximum ground protection radius determined by the protection angle size and the distance D at both ends 0 :

[0172]

[0173] S33. Equivalent the O - O' section at the lowest point to an isosceles triangle. According to the ground protection width d 0 and the minimum protection height h 0 , calculate the minimum protection width b corresponding to the position with a height of h 0x on the O - O' section x :

[0174] .

[0175] In addition, those of ordinary skill in the art can understand that all or part of the processes in the methods of implementing the above embodiments can be completed by instructing relevant hardware through a computer program. This computer program includes program instructions, and the computer program can be stored in a storage medium, and this storage medium is a computer-readable storage medium. The program instructions are executed by at least one processor in the power protection system to implement the process steps of the above method embodiments.

[0176] Therefore, the present application also provides a computer-readable storage medium, which stores a protection range determination program for an equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination. When the protection range determination program for the equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination is executed by a processor, it realizes each step of the protection range determination method for the equal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination as described in the above embodiments.

[0177] Among them, the computer-readable storage medium can be various computer-readable storage media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, or an optical disc that can store program codes.

[0178] It should be noted that since the storage medium provided in the embodiments of the present application is the storage medium used to implement the method of the embodiments of the present application, those skilled in the art can understand the specific structure and deformation of the storage medium based on the method introduced in the embodiments of the present application. Therefore, it will not be elaborated here. Any storage medium used in the method of the embodiments of the present application belongs to the scope to be protected by the present application.

[0179] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take 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 codes.

[0180] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the specified functions in Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0181] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured product including an instruction device, and the instruction device realizes the functions specified in the flow Figure 1one process or multiple processes and / or boxes Figure 1 the functions specified in one box or multiple boxes.

[0182] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one process or multiple processes and / or boxes Figure 1 the functions specified in one box or multiple boxes.

[0183] It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim listing several devices, several of these devices may be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words may be interpreted as names.

[0184] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0185] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and variations.

Claims

1. A method for determining the protection range of an equal-height double-branch plasma lightning arrester based on the principle of concentrated charge elimination, characterized in that: Applied to a lightning protection field including at least two plasma lightning arresters arranged at the same height, the method comprises the following steps: S10, measuring the installation height, outer protection angle, inner protection angle, and the distance between two plasma lightning arresters of the plasma lightning arrester; S20, calculating the tangent value of the complementary angle of the outer protection angle, and calculating the protection radius at the target outer height and the outer maximum ground protection radius according to the installation height and the tangent value of the complementary angle of the outer protection angle, wherein the calculation expression of the protection radius at the target outer height is as follows: ； The calculation expression of the outer maximum ground protection radius is as follows: ； In the formula, Target outer height The protection radius at is the installation height of plasma lightning arrester, m i The complementary angle of the outer protection angle of the plasma lightning arrester The tangent value of , , ; S30, calculating the tangent value of the complementary angle of the inner protection angle, and calculating the protection radius at the target inner minimum protection height according to the installation height, the spacing and the tangent value of the complementary angle of the inner protection angle. The calculation expression of the protection radius at the inner minimum protection height is as follows: ； ； ； In the formula, The cross-section height at the lowest point inside the target The protection radius at is the ground protection width at the lowest point of the plasma lightning arrester, is the minimum protection height of the plasma lightning arrester. is the installation height of the plasma lightning arrester, D is the distance between two plasma lightning arresters; u i The complementary angle of the outer protection angle of the plasma lightning arrester The tangent value of ; S40, determining the protection range of the two plasma lightning arresters according to the protection radius at the outer height of the target, the outer maximum ground protection radius, the protection radius at the inner minimum protection height of the target, the ground protection width at the lowest point of the plasma lightning arrester and the minimum protection height of the plasma lightning arrester.

2. The method for determining the protection range of the equal-height double-branch plasma lightning arrester based on the principle of concentrated charge elimination as claimed in claim 1 is characterized in that: The derivation process of the protection radius at the target outer height includes: S21, establish the equivalent hyperbolic equation and asymptotic line model of the double-branch equal-height plasma lightning arrester S i and Li : ； ； ； In the formula, a i 、b i 、c i The hyperbolic equations S i The real semi-axis length, the imaginary semi-axis length, and the distance from the focus to the origin; S22, assuming that the outer protection angles of two equal-height plasma lightning arresters are , installation height of two equal height plasma lightning arresters , let the complementary angle of the protection angle is equal to the slope angle of the hyperbola asymptote, that is , (i=1,2), let the focal distance c i Equal to PLP installation height ,get: ； ； make , combining the above formula, we get: ； S23, order , substitute into the equivalent hyperbolic equation S i ,get: ； S24, let the outer height be h ix The protection range R ix， make , then: ； make , sorted out: 。 3. The method for determining the protection range of the equal-height double-branch plasma lightning arrester based on the principle of concentrated charge elimination as claimed in claim 2 is characterized in that: The derivation process of the protection radius at the inner minimum protection height includes: S31, assuming that the minimum protection height of two plasma lightning arresters of equal height is h0 when the distance between them is D, and the protection angle , , , then there is the asymptotic equation ,exist and When , there is a minimum protection height h0: ； S32, the maximum ground protection radius is taken as 14 times the installation height, that is , calculate the ground protection width d0 at the lowest point according to the maximum ground protection radius determined by the protection angle and the distance D between the two branches: ； S33, the O-O' section at the lowest point is equivalent to an isosceles triangle, and the height h on the O-O' section is calculated according to the ground protection width d0 and the minimum protection height h0. 0x The minimum protection width b corresponding to the position x : 。 4. The method for determining the protection range of the equal-height double-branch plasma lightning arrester based on the principle of concentrated charge elimination as claimed in claim 1 is characterized in that: The distance D between two plasma lightning arresters is less than 2 times the maximum ground protection radius.

5. A lightning protection device, characterized in that: The lightning protection device comprises at least two plasma lightning arresters arranged at the same height. When calculating the joint protection range formed by the two plasma lightning arresters, the lightning protection device adopts the method for determining the protection range of equal-height double-branch plasma lightning arresters based on the principle of charge aggregation and lightning elimination as described in claim 1.

6. A power protection system, characterized in that: The power protection system includes: a memory, a processor, and a protection range determination program for an equi-height double-branch plasma lightning arrester based on the principle of charge aggregation and lightning elimination, which is stored in the memory and can be run on the processor. When the protection range determination program for an equi-height double-branch plasma lightning arrester based on the principle of charge aggregation and lightning elimination is executed by the processor, the steps of the protection range determination method for an equi-height double-branch plasma lightning arrester based on the principle of charge aggregation and lightning elimination as described in any one of claims 1 to 3 are implemented.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program for determining the protection range of an equi-height double-branch plasma lightning arrester based on the principle of concentrated charge elimination. When the program for determining the protection range of an equi-height double-branch plasma lightning arrester based on the principle of concentrated charge elimination is executed by a processor, the steps of a method for determining the protection range of an equi-height double-branch plasma lightning arrester based on the principle of concentrated charge elimination are implemented as described in any one of claims 1 to 3.

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