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

Abstract

This application relates to the technical field of power system protection, and particularly to a method for determining the protection range of an unequal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination. According to the range of air field strength distortion during the PLP operation process, the outer protection range of the double-branch non-equal-height PLP 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 protection effect can be improved when the double-branch non-equal-height PLP is jointly protected, an equivalent model of the protection range after expanding the inner protection angle of the double-branch non-equal-height PLP is used to determine the inner protection range, so as to make full use of the self-protection ability of the PLP. The aim is to solve the problem of how to calculate the protection range of the double-branch non-equal-height plasma lightning arrester.

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 unequal-height double-branch plasma lightning arrester based on the principle of charge accumulation 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 cloud 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 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) charges developed by the cloud electric field ionization downward, and diverge downward to cancel the positive (negative) charges 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 lead principle of lightning rods, and the protection range is calculated through the final jump distance of the lightning leader development, that is, the striking distance.

[0004] However, since the PLP does not have a lightning-leading effect, the protection range calculation of traditional lightning protection devices is not completely 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, and 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.

[0005] The above content is only used to assist in understanding the technical solution of the present application, and does not represent an admission that the above content is prior art. Summary of the Invention

[0006] The main purpose of the present application is to provide a method for determining the protection range of an unequal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination, aiming to solve the problem of how to calculate the protection range of a double-branch non-equal-height plasma lightning arrester.

[0007] To achieve the above purpose, a method for determining the protection range of an unequal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination provided by the present application includes:

[0008] S10, measure the installation height, outer protection angle, inner protection angle of the target plasma lightning arrester, and the spacing between the target plasma lightning arrester and another non-equal-height plasma lightning arrester;

[0009] S20, calculate the tangent value of the complementary angle of the outer protection angle of the target plasma lightning arrester, and calculate the protection radius at the target outer height and the maximum outer ground protection radius of the target plasma lightning arrester 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:

[0010]

[0011] The calculation expression of the maximum outer ground protection radius is as follows:

[0012]

[0013] In the formula, is the protection radius at the target outer height , is the installation height of the target plasma lightning arrester, m i is the complementary angle of the outer protection angle of the target plasma lightning arrester tangent value , ;

[0014] S30, calculate the tangent value of the complementary angle of the inner protection angle of the target plasma lightning arrester, and calculate the protection radius at the target inner lowest protection height of the target plasma lightning arrester 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 lowest protection height is as follows:

[0015]

[0016]

[0017]

[0018] In the formula, is the cross-section height at the target inner lowest point protection radius at the place, is the ground protection width at the lowest point of the plasma lightning arrester, is the lowest protection height of the target plasma lightning arrester, is the installation height of the target plasma lightning arrester, is the installation height difference between the target plasma lightning arrester and another non-equal-height plasma lightning arrester, D is the spacing; ui The complementary angle of the outer protection angle of the target plasma lightning arrester The tangent value of ;

[0019] S40, determining the joint protection range of the target plasma lightning arrester and another non-equal height plasma lightning arrester according to the protection radius at the target outer height, the outer maximum ground protection radius, the protection radius at the target inner minimum protection height, the ground protection width at the lowest point of the target plasma lightning arrester and the minimum protection height of the target plasma lightning arrester.

[0020] Optionally, the derivation process of the protection radius at the target outer height includes:

[0021] S21, establish the equivalent hyperbolic equation and asymptotic model of the double-branch non-equal height plasma lightning arrester S i and Li :

[0022]

[0023]

[0024]

[0025] 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;

[0026] S22, assuming that the outer protection angles of the two plasma lightning arresters are , installation height of two 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 the installation height of the plasma lightning arrester ,get:

[0027]

[0028]

[0029] make , combining the above formula, we get:

[0030]

[0031] S23, order , substituting into the equivalent hyperbola equation Si, we get:

[0032]

[0033] S24, let the outer height be h ix the protection range R at ix , let , then we have:

[0034]

[0035] Let , after arrangement, we get:

[0036] .

[0037] Optionally, the derivation process of the protection radius at the lowest inner protection height includes:

[0038] S31, let the lowest protection height be h0 when the distance between the target plasma lightning arrester and another non-equal-height plasma lightning arrester is D, and the protection angle , , , at this time, there is an asymptote equation:

[0039]

[0040] , and

[0041]

[0042] At and , there is the lowest protection height h0:

[0043]

[0044] It is solved that at and , there is the low protection height h0:

[0045]

[0046] S32, take the maximum ground protection radius 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 size and the distance D between the two:

[0047]

[0048] S33. Equivalent the O - O' section at the lowest point to an isosceles triangle, and calculate the minimum protection width b corresponding to the height h on the O - O' section according to the ground protection width d0 and the lowest protection height h0 0x at the position x :

[0049] .

[0050] Optionally, the distance between the target plasma lightning arrester and another non - equal - height plasma lightning arrester satisfies the following constraint:

[0051]

[0052] where D is the distance, is the installation height of the target plasma lightning arrester, is the installation height of another non - equal - height plasma lightning arrester.

[0053] In addition, to achieve the above - mentioned purpose, the present application also provides a lightning protection device, which includes at least two non - equal - height plasma lightning arresters. When calculating the combined protection range formed by the two plasma lightning arresters, the protection range determination method of the non - equal - height double - branch plasma lightning arrester based on the charge - accumulation lightning elimination principle as described above is adopted.

[0054] In addition, to achieve the above - mentioned purpose, the present application also provides a power protection system, which includes: a memory, a processor, and a protection range determination method program of the non - equal - height double - branch plasma lightning arrester based on the charge - accumulation lightning elimination principle stored on the memory and executable on the processor. When the protection range determination method program of the non - equal - height double - branch plasma lightning arrester based on the charge - accumulation lightning elimination principle is executed by the processor, the steps of the protection range determination method of the non - equal - height double - branch plasma lightning arrester based on the charge - accumulation lightning elimination principle as described in any one of the above are realized.

[0055] In addition, to achieve the above - mentioned purpose, the present application also provides a computer - readable storage medium, on which a protection range determination method program of the non - equal - height double - branch plasma lightning arrester based on the charge - accumulation lightning elimination principle is stored. When the protection range determination method program of the non - equal - height double - branch plasma lightning arrester based on the charge - accumulation lightning elimination principle is executed by a processor, the steps of the protection range determination method of the non - equal - height double - branch plasma lightning arrester based on the charge - accumulation lightning elimination principle as described in any one of the above are realized.

[0056] The present application has at least the following beneficial effects:

[0057] By establishing an equivalent hyperbolic model for the charge dissipation principle and its dissipation range in the thundercloud and ground electric field during the actual operation of the PLP, it is more in line with the protection range formed by the combination of two unequal-height PLPs, and can effectively utilize the protection ability of the PLP itself for protection range calculation. Description of the Drawings

[0058] Figure 1 Schematic diagram of the protection range of a single plasma lightning arrester involved in the embodiment of the present application;

[0059] Figure 2 Schematic diagram of the equivalent hyperbolic model of the protection range of two non-equal-height PLPs involved in the embodiment of the present application;

[0060] Figure 3 Schematic flow chart of the method for determining the protection range of unequal-height double plasma lightning arresters based on the principle of charge accumulation and lightning elimination involved in the embodiment of the present application;

[0061] Figure 4 For the O - O' section involved in the embodiment of the present application, the minimum protection range at the height of h 0x is shown in the schematic diagram;

[0062] Figure 5 Schematic diagram of the architecture of the hardware operating environment of the power protection system involved in the embodiment of the present application.

[0063] The realization, functional characteristics and advantages of the purpose of the present application will be further described in conjunction with the embodiments with reference to the drawings. Detailed Embodiment

[0064] To better understand the above technical solutions, the exemplary embodiments of the present disclosure will be described in more detail below with reference to the 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.

[0065] First Embodiment

[0066] Refer 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 through the "needle tip array" on its surface, the electric field intensity around it is increased to form strong ionization. The generated ions will diverge upward 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 hyperbolic 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.

[0067] For the protection scope of the double-branch non-equal-height PLP, refer to Figure 2 the schematic diagram of the equivalent hyperbola model of the protection scope of the double-branch non-equal-height PLP shown in Figure 2 . Taking the direction in Figure 2 as an example, its protection scope is divided into the outer protection scope on the left side of PLP#1 and the right side of PLP#2, and the inner protection scope between PLP#1 and PLP#2. According to the range of the air field strength distortion during the operation of the PLP, the outer protection scope of the double-branch non-equal-height PLP is approximately equivalent to the hyperbola envelope range, and the inner combined protection scope is approximately equivalent to the asymptote envelope range. The hyperbola asymptote angle is used to equivalently represent the lightning protection angle of the PLP, that is, the relationship between the actual protection scope of the PLP and the protection angle is approximately equivalent by using the relationship between the hyperbola and the asymptote.

[0068] Refer to Figure 3 , in this embodiment, the method for determining the protection scope of the non-equal-height double-branch plasma lightning arrester based on the principle of charge aggregation and lightning elimination includes the following steps:

[0069] S10, measure the installation height, outer protection angle, inner protection angle of the target plasma lightning arrester, and the distance between the target plasma lightning arrester and another non-equal-height plasma lightning arrester;

[0070] In this embodiment, measure the installation height, outer protection angle, inner protection angle of the target plasma lightning arrester, and the distance between the two non-equal-height plasma lightning arresters.

[0071] The target plasma lightning arrester can be any installed plasma lightning arrester selected in the area. The non-equal-height plasma lightning arrester refers to the plasma lightning arrester that is not on the same horizontal plane as the target plasma lightning arrester. The heights of the two lightning arresters are the same, but their installation heights are different.

[0072] 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.

[0073] S20, calculate the tangent value of the complementary angle of the outer protection angle of the target plasma lightning arrester. 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 of the target plasma lightning arrester and the maximum ground protection radius outside, where the calculation expression of the protection radius at the target outer height is as follows:

[0074]

[0075] The calculation expression of the maximum ground protection radius outside is as follows:

[0076]

[0077] In the formula, is the protection radius at the target outer height , is the installation height of the target plasma lightning arrester, m i is the complementary angle of the outer protection angle of the target plasma lightning arrester is the tangent value of , ;

[0078] 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.

[0079] The specific derivation process is as follows:

[0080] First, take the top of the #1 PLP tower as the coordinate origin and establish a plane rectangular coordinate system.

[0081] Furthermore, according to the "charge-accumulating and lightning-eliminating" effect range of the PLP, establish the equivalent hyperbola equation and its asymptote model, then the #1 mathematical model is as follows:

[0082] (1)

[0083] (2)

[0084] (3)

[0085] Assume that the horizontal distance between two PLP towers is D, then the #2 tower mathematical model is as follows:

[0086] (4)

[0087] (5)

[0088] (6)

[0089] 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:

[0090] (7)

[0091] (8)

[0092] Furthermore, assume that the outer protection angles of the double-branch PLP are all , make the complementary angle of the protection angle equal to the slope angle of the hyperbola asymptote, that is , (i = 1, 2), then there are the following relationships:

[0093]

[0094] (9)

[0095] Furthermore, let the installation height of the double - branch non - equal - height PLP , and make , that is, the focal distance is equal to the installation height of the PLP. Then, from equations (3) and (6), we get:

[0096] (10)

[0097] Furthermore, by combining equations (2), (3) or (5), (6), and making , then the installation height can be calculated as when the value of a i and b i are obtained as:

[0098]

[0099]

[0100] The solution is

[0101] (11)

[0102] Furthermore, make , substitute equation (11) back into equations (1) and (4), and get the new hyperbola equation (when i = 2, x2 = x1 - D):

[0103] (12)

[0104] Furthermore, calculate the outer protection range of the double - branch PLP. According to the properties of the hyperbola, the maximum protection radius R i on the outside is equal to half of the latus rectum:

[0105] The latus rectum formula is:

[0106] (13)

[0107] The maximum protection radius R i is:

[0108] (14)

[0109] Or further, there is:

[0110] (15)

[0111] Further, calculate the outer height as h ix The protection range R ix ,make , substituting into equation (11), we can obtain the new hyperbolic equation:

[0112] (16)

[0113]

[0114]

[0115] The final expression is as follows:

[0116] (17)

[0117] S30, calculating the tangent value of the complementary angle of the inner protection angle of the target plasma lightning arrester, and calculating the protection radius of the target plasma lightning arrester 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:

[0118]

[0119]

[0120]

[0121] 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 target plasma lightning arrester, is the installation height of the target plasma lightning arrester, is the installation height difference between the target plasma lightning arrester and another non-equal height plasma lightning arrester, D is the spacing; u i The complementary angle of the outer protection angle of the target plasma lightning arrester The tangent value of ;

[0122] In this embodiment, for the inner protection range between two non-equal-height PLPs, the protection radius at different heights is also inconsistent. The specific derivation process is as follows:

[0123] First, let the minimum protection height be h0 when the distance between the target plasma lightning arrester and another non-equal-height plasma lightning arrester is D, and the protection angle , , , at this time, there is an asymptote equation:

[0124]

[0125] , and

[0126]

[0127] At and , there is a minimum protection height h0:

[0128]

[0129] It is solved that at and , there is a low protection height h0:

[0130] (18)

[0131] Furthermore, take the maximum ground protection radius as 14 times the installation height, that is:

[0132] (19)

[0133] 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:

[0134] (20)

[0135] Optionally, the distance between the target plasma lightning arrester and another non-equal-height plasma lightning arrester satisfies the following constraints:

[0136] (21)

[0137] Finally, the O—O’ section at the lowest point is equivalent to an isosceles triangle. According to the ground protection width d0 and the minimum protection height h0, calculate the minimum protection width b 0x corresponding to the position with height h x :

[0138] (22)

[0139] In the formula, D is the distance, is the installation height of the target plasma lightning arrester, is the installation height of another non-equal-height plasma lightning arrester.

[0140] S40. Determine the combined protection range formed by the target plasma lightning arrester and another non-equal-height plasma lightning arrester according to the protection radius at the target outer height, the maximum ground protection radius on the outside, the protection radius at the lowest protection height on the target inner side, the ground protection width at the lowest point of the target plasma lightning arrester, and the lowest protection height of the target plasma lightning arrester.

[0141] 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 on the target inner side. 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, determine the combined protection range formed by the target plasma lightning arrester and another non-equal-height plasma lightning arrester according to the four parameters.

[0142] 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 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.

[0143] When the object to be protected is within the inner protection range between two non-equal-height PLPs, refer to Figure 4 the schematic diagram of the minimum protection range at the height of h shown in the O—O’ cross-section. 0x Taking the height of the object to be protected as the target inner height, 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.

[0144] Exemplarily, assume that the outer protection angle takes a value of , then , the installation height of the target plasma lightning arrester is taken as h1 = 20m, the installation height of another non-equal-height plasma lightning arrester is taken as h2 = 30m, and u1 = 0.07.

[0145] Assume that the distance D between two non-equal-height PLPs is 450m, satisfying Substitute \(m\), \(u_1\), and \(D\) into Equation (18), and calculate to obtain \(h_0 = 3.9m\) at the lowest point of the combined protection. Calculate the ground protection width \(d_0 = 159.69m\) at the lowest point.

[0146] Take the height \(h\) at the O - O' section 0x \(= 2m\). Substitute \(h_0\) and \(d_0\) into Equation (22), and calculate the minimum protection width \(b\) corresponding to the position of the height \(h\) at the O - O' section at the lowest point 0x x \(= 77.80m\).

[0147] In the technical solution provided in this embodiment, according to the range of the distortion of the air field strength during the PLP working process, the outer protection range of the double - branch non - equal - height PLP 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 effect can be improved when the double - branch non - equal - height PLP is jointly protected, an equivalent model of the protection range after expanding the inner protection angle of the double - branch non - equal - height PLP is used to determine the inner protection range, so as to make full use of the self - protection ability of the PLP.

[0148] In addition, as an implementation solution, the embodiment of the present application also provides a lightning protection device, which includes at least two non - equal - height - arranged plasma lightning rejectors. When calculating the combined protection range formed by the two plasma lightning rejectors, the above - mentioned method for determining the protection range of the non - equal - height double - branch plasma lightning rejector based on the principle of charge - accumulation lightning elimination is adopted.

[0149] In addition, as an implementation solution, Figure 5 It 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.

[0150] As Figure 5 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 realize 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.

[0151] Those skilled in the art can understand, Figure 5 ​The power protection system architecture shown does not limit the power protection system, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0152] As Figure 1 shown, the memory 1005, as a storage medium, may include an operating system, a network communication module, a user interface module, and a protection range determination program for an unequal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination. Among them, the operating system is a program that manages and controls the hardware and software resources of the power protection system, and runs the protection range determination program for the unequal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination and other software or programs.

[0153] In Figure 5 the power protection system shown, the user interface 1003 is mainly used to connect to the terminal and communicate with the terminal for data; the network interface 1004 is mainly used for the background server and communicates with the background server for data; the processor 1001 can be used to call the protection range determination program for the unequal-height double-branch plasma lightning arrester stored in the memory 1005.

[0154] In this embodiment, the power protection system includes: a memory 1005, a processor 1001, and a protection range determination program for an unequal-height double-branch plasma lightning arrester stored on the memory and operable on the processor, where:

[0155] When the processor 1001 calls the protection range determination program for the unequal-height double-branch plasma lightning arrester stored in the memory 1005, the following operations are performed:

[0156] S10, measure the installation height, outer protection angle, inner protection angle of the target plasma lightning arrester, and the distance between the target plasma lightning arrester and another non-equal-height plasma lightning arrester;

[0157] S20, calculate the tangent value of the complementary angle of the outer protection angle of the target plasma lightning arrester, and calculate the protection radius at the target outer height and the maximum outer ground protection radius of the target plasma lightning arrester according to the installation height and the tangent value of the complementary angle of the outer protection angle, where the calculation expression for the protection radius at the target outer height is as follows:

[0158]

[0159] The calculation expression for the maximum outer ground protection radius is as follows:

[0160]

[0161] In the formula, is the protection radius at the outer height of the target , is the installation height of the target plasma lightning arrester, m i is the complementary angle of the outer protection angle of the target plasma lightning arrester tangent value of , ;

[0162] S30, calculate the tangent value of the complementary angle of the inner protection angle of the target plasma lightning arrester, and calculate the protection radius at the target inner lowest protection height of the target plasma lightning arrester 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 lowest protection height is as follows:

[0163]

[0164]

[0165]

[0166] In the formula, is the cross-section height at the lowest point of the target inner side protection radius at is the ground protection width at the lowest point of the plasma lightning arrester is the lowest protection height of the target plasma lightning arrester is the installation height of the target plasma lightning arrester is the installation height difference between the target plasma lightning arrester and another non-equal-height plasma lightning arrester, D is the spacing; u i is the complementary angle of the outer protection angle of the target plasma lightning arrester tangent value of ;

[0167] S40, determine the combined protection range formed by the target plasma lightning arrester and another non-equal-height plasma lightning arrester 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 target plasma lightning arrester and the lowest protection height of the target plasma lightning arrester

[0168] When the processor 1001 calls the protection range determination program of the non-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:

[0169] S21, establish the equivalent hyperbola equation of the double-branch non-equal-height plasma lightning arrester and its asymptote model S i and y Li:

[0170]

[0171]

[0172]

[0173] Wherein, a i , b i , c i are respectively the length of the real semi-axis, the length of the imaginary semi-axis, and the distance from the focus to the origin of the hyperbola equation S i ;

[0174] S22. Let the outer protection angles of both plasma lightning arresters be , the installation heights of both plasma lightning arresters . 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 installation height of the plasma lightning arrester , and we get:

[0175]

[0176]

[0177] Let , and by combining the above equations, we get:

[0178]

[0179] S23. Let , substitute it into the equivalent hyperbola equation Si, and we get:

[0180]

[0181] S24. Let the protection range R ix at the outer height h ix . Let , then we have:

[0182]

[0183] Let , and after sorting, we get:

[0184] .

[0185] When the processor 1001 calls the protection range determination program of the unequal-height double-branch plasma lightning arrester stored in the memory 1005, the following operations are performed:

[0186] S31. Let the minimum protection height be h0 when the distance between the target plasma lightning arrester and another non-equal-height plasma lightning arrester is D, and the protection angle , , , at this time, there is an asymptote equation:

[0187]

[0188] , and

[0189]

[0190] At and , there is a minimum protection height h0:

[0191]

[0192] It is solved that at and , there is a low protection height h0:

[0193]

[0194] S32. Take the maximum ground protection radius 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 size and the distance D between the two:

[0195]

[0196] S33. Equivalent the O - O' section at the lowest point to an isosceles triangle. According to the ground protection width d0 and the minimum protection height h0, calculate the minimum protection width b 0x corresponding to the position with height h x :

[0197] .

[0198] 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.

[0199] Therefore, the present application also provides a computer-readable storage medium storing a program for determining the protection range of an unequal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination. When the program for determining the protection range of the unequal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination is executed by a processor, it implements each step of the method for determining the protection range of the unequal-height double-branch plasma lightning arrester based on the principle of charge accumulation and lightning elimination as described in the above embodiments.

[0200] Among them, the computer-readable storage medium may 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.

[0201] 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 variations of the storage medium based on the method introduced in the embodiments of the present application, so it will not be elaborated here. Any storage medium used in the method of the embodiments of the present application falls within the scope of protection of the present application.

[0202] 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 be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can be in 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.

[0203] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (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 implementing the specified functions in Figure 1 one or more flows or multiple flows and / or blocks Figure 1 one or more blocks or multiple blocks.

[0204] 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 implements the functions in the flowFigure 1 one process or multiple processes and / or boxes Figure 1 the functions specified in one box or multiple boxes.

[0205] 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 one box or multiple boxes.

[0206] It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. 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 the unit claims 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 can be interpreted as names.

[0207] 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.

[0208] 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 unequal height double-branch plasma lightning arrester based on the principle of charge aggregation and lightning elimination, characterized in that: Applied to a lightning protection field including at least two plasma lightning arresters arranged at non-equal heights, the method comprises the following steps: S10, measuring the installation height, outer protection angle, inner protection angle of the target plasma lightning arrester, and the distance between the target plasma lightning arrester and another plasma lightning arrester of non-equal height; S20, calculating the tangent value of the complementary angle of the outer protection angle of the target plasma lightning arrester, and calculating the protection radius at the target outer height and the outer maximum ground protection radius of the target plasma lightning arrester according to the installation height and 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 the target plasma lightning arrester, m i The complementary angle of the outer protection angle of the target plasma lightning arrester The tangent value of , ; S30, calculating the tangent value of the complementary angle of the inner protection angle of the target plasma lightning arrester, and calculating the protection radius of the target plasma lightning arrester 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 target plasma lightning arrester, is the installation height of the target plasma lightning arrester, is the installation height difference between the target plasma lightning arrester and another non-equal height plasma lightning arrester, D is the spacing; u i The complementary angle of the outer protection angle of the target plasma lightning arrester The tangent value of ; S40, determining the joint protection range of the target plasma lightning arrester and another non-equal height plasma lightning arrester according to the protection radius at the target outer height, the outer maximum ground protection radius, the protection radius at the target inner minimum protection height, the ground protection width at the lowest point of the target plasma lightning arrester and the minimum protection height of the target plasma lightning arrester.

2. The method for determining the protection range of the unequal 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 model of the double-branch non-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 the two plasma lightning arresters are , installation height of two 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 the installation height of the plasma lightning arrester ,get: ； ； make , combining the above formula, we get: ； S23, order , substituting into the equivalent hyperbolic equation Si, we 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 unequal 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 when the distance between the target plasma lightning arrester and another non-equal height plasma lightning arrester is D is h0, and the protection angle , , , then there is an asymptote equation: ； ,and ; ； exist and When , there is a minimum protection height h0: ； The solution is and There is a low 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 ends: ； 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 unequal 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 between the target plasma lightning arrester and another non-equal height plasma lightning arrester satisfies the following constraints: ； Where D is the spacing, is the installation height of the target plasma lightning arrester, It is the installation height of another non-equal height plasma lightning arrester.

5. A lightning protection device, characterized in that: The lightning protection device includes at least two plasma lightning arresters arranged at non-equal heights. 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 unequal height double plasma lightning arresters based on the principle of charge aggregation and lightning elimination as described in any one of claims 1 to 4.

6. A power protection system, characterized in that: The power protection system includes: a memory, a processor, and a method program for determining the protection range of unequal height double-branch plasma lightning arresters based on the principle of charge concentration and lightning elimination, which is stored in the memory and can be run on the processor. When the method program for determining the protection range of unequal height double-branch plasma lightning arresters based on the principle of charge concentration and lightning elimination is executed by the processor, the steps of the method for determining the protection range of unequal height double-branch plasma lightning arresters based on the principle of charge concentration and lightning elimination as described in any one of claims 1 to 4 are implemented.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a method program for determining the protection range of unequal-height double-branch plasma lightning arrester based on the principle of charge concentration and lightning elimination. When the method program for determining the protection range of unequal-height double-branch plasma lightning arrester based on the principle of charge concentration and lightning elimination is executed by the processor, the steps of the method for determining the protection range of unequal-height double-branch plasma lightning arrester based on the principle of charge concentration and lightning elimination as described in any one of claims 1 to 4 are implemented.

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