Method and system for determining electrostatic discharge voltage at 5G base station antenna cable connection port

Abstract

The present invention relates to a method and system for determining the electrostatic discharge voltage of a 5G base station antenna cable connection port, which belongs to the field of high-voltage lightning protection technology. An electrostatic discharge model of a DC transmission line is constructed, and the electrostatic discharge voltage is determined to be equal to the ratio of the charge of a power supply to the capacitance of a capacitor according to the electrostatic discharge model. The charge of the power supply is the sum of the space charge gathered by the 5G antenna metal plate and the charge gathered by the antenna cable, and the capacitance of the capacitor is the capacitance of the antenna cable capacitor and the 5G base station equipment port capacitor in parallel, and then the space charge gathered by the 5G antenna metal plate and the charge gathered by the antenna cable are calculated to obtain the electrostatic discharge voltage of the DC transmission line to be tested. The present invention realizes the evaluation of the electrostatic discharge voltage in combination with existing standards while considering factors such as the voltage level of the transmission line, the antenna area, and the cable length.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage lightning protection technology, and in particular to a method and system for determining the electrostatic discharge voltage of a 5G base station antenna feed cable connection port. Background Art

[0002] Power and communication shared towers (generally referred to as "shared towers") refer to the installation of communication equipment on power towers, and the attachment of communication facilities such as optical cables and mobile antennas to the transmission tower body, thereby achieving the sharing of power and communication infrastructure resources. Shared towers have great promotion value and broad application prospects, so it is very necessary to study related technologies to ensure the safe and reliable operation of shared towers.

[0003] There are two types of power lines: AC transmission lines and DC transmission lines. DC transmission lines will generate positive and negative ions in space due to the high-voltage corona phenomenon. The positive and negative ions accumulate on the antenna metal plate and are transmitted to the base station equipment port along the antenna feed cable. When a large amount of charge accumulates, it is discharged at the equipment port in the form of electrostatic discharge interference pulses, causing potential damage to the base station equipment.

[0004] Although YDT2583.18-2019 "Electromagnetic compatibility performance requirements and measurement methods for cellular mobile communication equipment Part 18: 5G user equipment and auxiliary equipment" stipulates the test methods and test levels for electrostatic discharge immunity, there is no corresponding evaluation method for the test level required for electrostatic discharge immunity in the presence of space charge. Summary of the invention

[0005] The purpose of the present invention is to provide a method and system for determining the electrostatic discharge voltage of a 5G base station antenna feed cable connection port to achieve the evaluation of the electrostatic discharge voltage.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A method for determining the electrostatic discharge voltage of a 5G base station antenna feed cable connection port, comprising:

[0008] Construct an electrostatic discharge model of a DC transmission line; the electrostatic discharge model is a circuit formed by connecting a power supply and a capacitor; the charge of the power supply is the sum of the space charge collected by the 5G antenna metal plate and the charge collected by the antenna feed cable, and the capacitance of the capacitor is the capacitance of the antenna feed cable and the port capacitance of the 5G base station device in parallel;

[0009] Establish a calculation function for the spatial charge gathered by the metal plate of the 5G antenna;

[0010] According to the electrostatic discharge model, an electrostatic discharge voltage calculation function is established; the electrostatic discharge voltage in the electrostatic discharge voltage calculation function is equal to the ratio of the charge of the power supply to the capacitance of the capacitor;

[0011] According to the parameters of the 5G antenna metal plate to be tested, the space charge gathered by the 5G antenna metal plate to be tested is calculated using the space charge calculation function;

[0012] Calculate the charge gathered by the antenna feeder cable to be tested according to the parameters of the antenna feeder cable to be tested;

[0013] According to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested, the electrostatic discharge voltage of the DC transmission line to be tested is obtained by using the electrostatic discharge voltage calculation function.

[0014] Optionally, the establishing of a spatial charge calculation function for the 5G antenna metal plate convergence specifically includes:

[0015] The capacitance of the 5G antenna metal plate is calculated according to the capacitance of the flat plate capacitor, and the calculation formula for determining the ion flow charge density is ρ = ε r ×I×R / d; where ρ represents the ion current charge density, ε r represents the dielectric constant in a vacuum, I represents the ion current, R represents the discharge resistance, and d represents the height of the 5G antenna metal plate from the ground;

[0016] According to the calculation formula of ion flow charge density, the space charge calculation function of the 5G antenna metal plate is determined to be Q1=ρ×S1; wherein Q1 represents the space charge gathered by the 5G antenna metal plate, and S1 represents the area of ​​the 5G antenna metal plate.

[0017] Optionally, a formula for calculating the charge gathered by the antenna feeder cable to be tested is: Q2=ρ×S2; wherein Q2 represents the charge gathered by the antenna feeder cable, and S2 represents the surface area of ​​the antenna feeder cable.

[0018] Optionally, obtaining the electrostatic discharge voltage of the DC transmission line to be tested by using the electrostatic discharge voltage calculation function according to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested, and the capacitance of the antenna feed cable to be tested, specifically includes:

[0019] Ignoring the port capacitance of the 5G base station equipment, the electrostatic discharge voltage calculation function is simplified to U=(Q1+Q2) / C1; wherein U represents the electrostatic discharge voltage, and C1 represents the antenna feed cable capacitance;

[0020] According to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested, the electrostatic discharge voltage of the DC transmission line to be tested is obtained by using a simplified electrostatic discharge voltage calculation function.

[0021] A 5G base station antenna feed cable connection port electrostatic discharge voltage determination system, comprising:

[0022] An electrostatic discharge model building module is used to build an electrostatic discharge model of a DC transmission line; the electrostatic discharge model is a circuit formed by connecting a power supply and a capacitor; the charge of the power supply is the sum of the space charge gathered by the 5G antenna metal plate and the charge gathered by the antenna feed cable, and the capacitance of the capacitor is the capacitance of the antenna feed cable capacitance and the 5G base station device port capacitance connected in parallel;

[0023] The space charge calculation function establishment module is used to establish the space charge calculation function of the 5G antenna metal plate convergence;

[0024] An electrostatic discharge voltage calculation function establishment module is used to establish an electrostatic discharge voltage calculation function according to the electrostatic discharge model; the electrostatic discharge voltage in the electrostatic discharge voltage calculation function is equal to the ratio of the charge of the power supply to the capacitance;

[0025] A space charge calculation module, used to calculate the space charge gathered by the metal plate of the 5G antenna to be tested using the space charge calculation function according to the parameters of the metal plate of the 5G antenna to be tested;

[0026] An antenna feeder cable charge calculation module is used to calculate the charge gathered by the antenna feeder cable to be tested according to the parameters of the antenna feeder cable to be tested;

[0027] The electrostatic discharge voltage calculation module is used to obtain the electrostatic discharge voltage of the DC transmission line to be tested based on the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested, using the electrostatic discharge voltage calculation function.

[0028] Optionally, the space charge calculation function establishment module specifically includes:

[0029] The ion flow charge density formula determination submodule is used to calculate the capacitance of the 5G antenna metal plate according to the capacitance of the flat plate capacitor, and determine the calculation formula of the ion flow charge density as ρ=ε r ×I×R / d; where ρ represents the ion current charge density, ε r represents the dielectric constant in a vacuum, I represents the ion current, R represents the discharge resistance, and d represents the height of the 5G antenna metal plate from the ground;

[0030] The space charge calculation function determination submodule is used to determine the space charge calculation function of the 5G antenna metal plate as Q1=ρ×S1 according to the calculation formula of the ion flow charge density; wherein Q1 represents the space charge gathered by the 5G antenna metal plate, and S1 represents the area of ​​the 5G antenna metal plate.

[0031] Optionally, a formula for calculating the charge gathered by the antenna feeder cable to be tested is: Q2=ρ×S2; wherein Q2 represents the charge gathered by the antenna feeder cable, and S2 represents the surface area of ​​the antenna feeder cable.

[0032] Optionally, the electrostatic discharge voltage calculation module specifically includes:

[0033] A simplification submodule is used to ignore the port capacitance of the 5G base station equipment and simplify the electrostatic discharge voltage calculation function to U=(Q1+Q2) / C1; wherein U represents the electrostatic discharge voltage and C1 represents the antenna feed cable capacitance;

[0034] The electrostatic discharge voltage acquisition submodule is used to obtain the electrostatic discharge voltage of the DC transmission line to be tested based on the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested, and the capacitance of the antenna feed cable to be tested, using a simplified electrostatic discharge voltage calculation function.

[0035] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0036] The present invention discloses a method and system for determining the electrostatic discharge voltage of a 5G base station antenna cable connection port, constructs an electrostatic discharge model of a DC transmission line, and determines that the electrostatic discharge voltage is equal to the ratio of the charge of a power supply to the capacitance of a capacitor according to the electrostatic discharge model. The charge of the power supply is the sum of the space charge gathered by the 5G antenna metal plate and the charge gathered by the antenna cable, and the capacitance of the capacitor is the capacitance of the antenna cable capacitor and the 5G base station equipment port capacitor in parallel, and then by calculating the space charge gathered by the 5G antenna metal plate and the charge gathered by the antenna cable, the electrostatic discharge voltage of the DC transmission line to be tested is obtained. The present invention realizes the evaluation of the electrostatic discharge voltage in combination with existing standards while considering factors such as the voltage level of the transmission line, the antenna area, and the cable length. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1A flow chart of a method for determining the electrostatic discharge voltage of a 5G base station antenna feed cable connection port provided by an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of an electrostatic discharge model provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] The purpose of the present invention is to provide a method and system for determining the electrostatic discharge voltage of a 5G base station antenna feed cable connection port to achieve the evaluation of the electrostatic discharge voltage.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] In order to solve the problem that there is no corresponding evaluation method for the test level required in the presence of space charge in the prior art, the embodiment of the present invention provides a method for determining the electrostatic discharge voltage of a 5G base station antenna cable connection port in combination with existing standards, taking into account factors such as the voltage level of the transmission line, the antenna area, and the cable length. Figure 1 As shown, including:

[0044] Step S1, constructing an electrostatic discharge model of a DC transmission line.

[0045] Electrostatic discharge model such as Figure 2 As shown, the electrostatic discharge model is a circuit formed by connecting a power supply and a capacitor. Figure 2 The device on the left represents the power supply, and the charge of the power supply is the sum of the space charge gathered by the 5G antenna metal plate and the charge gathered by the antenna feed cable. The device on the right represents the capacitor, and the capacitance of the capacitor is the capacitance of the antenna feed cable and the port capacitance of the 5G base station equipment in parallel.

[0046] Step S2, establishing a calculation function for the spatial charge gathered by the 5G antenna metal plate.

[0047] In one example, since the spatial ion flow density is closely related to the voltage level of the transmission line, the corona initiation field strength, the conductor radius, the ambient humidity, the wind speed, the haze and other factors, complex calculations are required for specific actual lines to obtain the spatial ion density. The embodiment of the present invention directly refers to the limit value of the ground ion flow current i given in the existing standard, and considers the test condition that the charge collected by the 5G antenna metal plate with an area of ​​S1=1㎡ at a height of d=0.1m from the ground is discharged through the discharge resistor with a resistance of R=1MΩ. Therefore, the calculation formula for estimating the ion flow charge density ρ is:

[0048] Charge density = charge amount / 5G antenna metal plate area = 5G antenna metal plate capacitance × 5G antenna metal plate voltage / 5G antenna metal plate area

[0049] Among them: The 5G antenna metal plate capacitance is calculated according to the capacitance of the flat plate capacitor. The calculation formula of the capacitance of the flat plate capacitor is: k is the electrostatic force constant.

[0050] The voltage of the 5G antenna metal plate is the ion flow current multiplied by the resistance of the discharge resistor.

[0051] After sorting, the ion flow charge density ρ = dielectric constant in vacuum × ion flow current × discharge resistor value / height of 5G antenna metal plate from the ground, that is, ρ = ε r ×I×R / d; where ρ represents the ion current charge density, ε r represents the dielectric constant in a vacuum, I represents the ion flow current, R represents the discharge resistance, and d represents the height of the 5G antenna metal plate from the ground.

[0052] The calculated ion current charge density ρ is used as the ion current density at the base station antenna position.

[0053] By multiplying the ion flow charge density ρ by the area S1 of the 5G antenna metal plate, we can obtain the space charge Q1 gathered by the 5G antenna metal plate.

[0054] Step S3, establishing an electrostatic discharge voltage calculation function according to the electrostatic discharge model; the electrostatic discharge voltage in the electrostatic discharge voltage calculation function is equal to the ratio of the charge of the power supply to the capacitance.

[0055] The calculation formula for electrostatic discharge voltage is U = (Q1 + Q2) / (C1 + C2). U represents the electrostatic discharge voltage, C1 represents the capacitance of the antenna cable, C2 represents the capacitance of the 5G base station equipment port, and Q2 represents the charge gathered by the antenna cable.

[0056] Step S4, according to the parameters of the 5G antenna metal plate to be tested, use the space charge calculation function to calculate the space charge gathered by the 5G antenna metal plate to be tested.

[0057] The space charge calculation function is ρ = ε r ×I×R / d, where the parameters of the 5G antenna metal plate to be tested refer to the discharge resistance R and the height d of the 5G antenna metal plate from the ground.

[0058] Step S5, calculating the charge gathered by the antenna feeder cable to be tested according to the parameters of the antenna feeder cable to be tested.

[0059] Since the charge comes from the attachment and accumulation of space charge generated after the DC line corona occurs on the cable, increasing the cable length will lead to an increase in the charge that can be stored, causing the discharge voltage to further increase.

[0060] The formula for calculating the charge gathered by the antenna feeder cable to be tested is: Q2=ρ×S2; where S2 represents the surface area of ​​the antenna feeder cable.

[0061] Step S6, according to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested, the electrostatic discharge voltage calculation function is used to obtain the electrostatic discharge voltage of the DC transmission line to be tested.

[0062] Capacitor C calculation: For the equipment connected to the base station, the capacitance C is the total capacitance of the antenna cable capacitance C1 and the 5G base station equipment port capacitance C2 in parallel. However, considering the diversity of base station equipment in actual evaluation, C2 is difficult to accurately determine, so a general terminal open circuit is considered, that is, C2 is not considered, and only the antenna cable capacitance C1 is considered.

[0063] Ignoring the port capacitance of the 5G base station equipment, the electrostatic discharge voltage calculation function is simplified to U=(Q1+Q2) / C1.

[0064] According to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested, the electrostatic discharge voltage of the DC transmission line to be tested is obtained by using a simplified electrostatic discharge voltage calculation function.

[0065] The following takes the 5G antenna suspended on the ±800kV DC transmission line tower as an example to describe in detail the electrostatic discharge voltage calculation process of the embodiment of the present invention.

[0066] (1) Calculate Q1

[0067] According to DLT1088-2020 "±800kV UHV DC Line Electromagnetic Environment Parameter Limits", the ion current limit under the line is 100nA / ㎡. According to the estimation method, it can be concluded that the ion current charge density ρ is about 8.85uC / ㎡

[0068] The size of the 5G antenna is approximately 795mm×395mm×220mm, and the area S for storing accumulated space ions is approximately 0.32㎡.

[0069] Space charge Q1 = 2.83uC.

[0070] (2) Calculate Q2

[0071] Taking the RG-58CU coaxial cable as an example, the radius is about 10mm, and the cable length is 10m, and its surface area is about 0.63㎡.

[0072] Space charge Q2 = 5.56uC.

[0073] The capacitance of the antenna feed cable is closely related to the cable model. Taking RG-58CU coaxial cable as an example, its standard capacitance is about 53pF / m.

[0074] Considering the cable length of 10m, the electrostatic discharge voltage is approximately

[0075] U=(Q1+Q2) / C=15kV.

[0076] The present invention provides a method for determining the electrostatic discharge voltage by taking into account factors such as the voltage level of the transmission line, the antenna area, and the cable length, in combination with existing standards.

[0077] An embodiment of the present invention further provides a 5G base station antenna feed cable connection port electrostatic discharge voltage determination system, comprising:

[0078] The electrostatic discharge model building module is used to build an electrostatic discharge model of a DC transmission line; the electrostatic discharge model is a circuit formed by connecting a power supply and a capacitor; the charge of the power supply is the sum of the space charge gathered by the 5G antenna metal plate and the charge gathered by the antenna feed cable, and the capacitance of the capacitor is the capacitance of the antenna feed cable and the port capacitance of the 5G base station equipment in parallel;

[0079] The space charge calculation function establishment module is used to establish the space charge calculation function of the 5G antenna metal plate convergence;

[0080] The electrostatic discharge voltage calculation function establishment module is used to establish an electrostatic discharge voltage calculation function according to an electrostatic discharge model; the electrostatic discharge voltage in the electrostatic discharge voltage calculation function is equal to the ratio of the charge of the power supply to the capacitance;

[0081] A space charge calculation module is used to calculate the space charge gathered by the metal plate of the 5G antenna to be tested using a space charge calculation function according to the parameters of the metal plate of the 5G antenna to be tested;

[0082] An antenna feeder cable charge calculation module is used to calculate the charge gathered by the antenna feeder cable to be tested according to the parameters of the antenna feeder cable to be tested;

[0083] The electrostatic discharge voltage calculation module is used to obtain the electrostatic discharge voltage of the DC transmission line to be tested by using the electrostatic discharge voltage calculation function according to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested.

[0084] The space charge calculation function establishment module includes:

[0085] The ion flow charge density formula determination submodule is used to calculate the capacitance of the 5G antenna metal plate according to the capacitance of the flat plate capacitor, and determine the calculation formula of the ion flow charge density as ρ=ε r ×I×R / d; where ρ represents the ion current charge density, ε r represents the dielectric constant in a vacuum, I represents the ion current, R represents the discharge resistance, and d represents the height of the 5G antenna metal plate from the ground;

[0086] The space charge calculation function determination submodule is used to determine the space charge calculation function of the 5G antenna metal plate as Q1=ρ×S1 according to the calculation formula of the ion flow charge density; wherein Q1 represents the space charge gathered by the 5G antenna metal plate, and S1 represents the area of ​​the 5G antenna metal plate.

[0087] The formula for calculating the charge gathered by the antenna feeder cable to be tested is: Q2=ρ×S2; wherein Q2 represents the charge gathered by the antenna feeder cable, and S2 represents the surface area of ​​the antenna feeder cable.

[0088] Electrostatic discharge voltage calculation module, specifically including:

[0089] The simplification submodule is used to ignore the port capacitance of the 5G base station equipment and simplify the electrostatic discharge voltage calculation function to U=(Q1+Q2) / C1; wherein U represents the electrostatic discharge voltage and C1 represents the capacitance of the antenna feed cable; the electrostatic discharge voltage acquisition submodule is used to obtain the electrostatic discharge voltage of the DC transmission line to be tested based on the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested, using the simplified electrostatic discharge voltage calculation function.

[0090] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0091] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for determining the electrostatic discharge voltage of a 5G base station antenna cable connection port, characterized in that: include: Constructing an electrostatic discharge model of a DC transmission line; the electrostatic discharge model is a circuit formed by connecting a power supply and a capacitor; The charge of the power supply is the sum of the space charge gathered by the 5G antenna metal plate and the charge gathered by the antenna feed cable, and the capacitance of the capacitor is the capacitance of the antenna feed cable and the port capacitance of the 5G base station device in parallel; Establish a calculation function for the spatial charge gathered by the metal plate of the 5G antenna; According to the electrostatic discharge model, an electrostatic discharge voltage calculation function is established; the electrostatic discharge voltage in the electrostatic discharge voltage calculation function is equal to the ratio of the charge of the power supply to the capacitance of the capacitor; According to the parameters of the 5G antenna metal plate to be tested, the space charge gathered by the 5G antenna metal plate to be tested is calculated using the space charge calculation function; Calculate the charge gathered by the antenna feeder cable to be tested according to the parameters of the antenna feeder cable to be tested; According to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested, the electrostatic discharge voltage calculation function is used to obtain the electrostatic discharge voltage of the DC transmission line to be tested; The establishment of a spatial charge calculation function for the 5G antenna metal plate convergence specifically includes: The capacitance of the 5G antenna metal plate is calculated according to the capacitance of the flat plate capacitor, and the calculation formula for determining the ion flow charge density is ρ = ε r ×I×R / d; where ρ represents the ion current charge density, ε r represents the dielectric constant in a vacuum, I represents the ion current, R represents the discharge resistance, and d represents the height of the 5G antenna metal plate from the ground; According to the calculation formula of ion flow charge density, the space charge calculation function of the 5G antenna metal plate is determined to be Q1=ρ×S1; where Q1 represents the space charge gathered by the 5G antenna metal plate, and S1 represents the area of ​​the 5G antenna metal plate; The formula for calculating the charge gathered by the antenna feeder cable to be tested is: Q2 = ρ × S2; where Q2 represents the charge gathered by the antenna feeder cable, and S2 represents the surface area of ​​the antenna feeder cable; The step of obtaining the electrostatic discharge voltage of the DC transmission line to be tested by using the electrostatic discharge voltage calculation function according to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested, and the capacitance of the antenna feed cable to be tested specifically includes: Ignoring the port capacitance of the 5G base station equipment, the electrostatic discharge voltage calculation function is simplified to U=(Q1+Q2) / C1; wherein U represents the electrostatic discharge voltage, and C1 represents the antenna feed cable capacitance; According to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested, the electrostatic discharge voltage of the DC transmission line to be tested is obtained by using a simplified electrostatic discharge voltage calculation function.

2. A 5G base station antenna cable connection port electrostatic discharge voltage determination system, characterized in that: include: An electrostatic discharge model building module is used to build an electrostatic discharge model of a DC transmission line; the electrostatic discharge model is a circuit formed by connecting a power supply and a capacitor; The charge of the power supply is the sum of the space charge gathered by the 5G antenna metal plate and the charge gathered by the antenna feed cable, and the capacitance of the capacitor is the capacitance of the antenna feed cable and the port capacitance of the 5G base station device in parallel; The space charge calculation function establishment module is used to establish the space charge calculation function of the 5G antenna metal plate convergence; An electrostatic discharge voltage calculation function establishment module is used to establish an electrostatic discharge voltage calculation function according to the electrostatic discharge model; the electrostatic discharge voltage in the electrostatic discharge voltage calculation function is equal to the ratio of the charge of the power supply to the capacitance; A space charge calculation module, used to calculate the space charge gathered by the metal plate of the 5G antenna to be tested using the space charge calculation function according to the parameters of the metal plate of the 5G antenna to be tested; An antenna feeder cable charge calculation module is used to calculate the charge gathered by the antenna feeder cable to be tested according to the parameters of the antenna feeder cable to be tested; An electrostatic discharge voltage calculation module is used to obtain the electrostatic discharge voltage of the DC transmission line to be tested by using the electrostatic discharge voltage calculation function according to the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested and the capacitance of the antenna feed cable to be tested; The space charge calculation function establishment module specifically includes: The ion flow charge density formula determination submodule is used to calculate the capacitance of the 5G antenna metal plate according to the capacitance of the flat plate capacitor, and determine the calculation formula of the ion flow charge density as ρ=ε r ×I×R / d; where ρ represents the ion current charge density, ε r represents the dielectric constant in a vacuum, I represents the ion current, R represents the discharge resistance, and d represents the height of the 5G antenna metal plate from the ground; The space charge calculation function determination submodule is used to determine the space charge calculation function of the 5G antenna metal plate as Q1=ρ×S1 according to the calculation formula of the ion flow charge density; wherein Q1 represents the space charge gathered by the 5G antenna metal plate, and S1 represents the area of ​​the 5G antenna metal plate; The formula for calculating the charge gathered by the antenna feeder cable to be tested is: Q2 = ρ × S2; where Q2 represents the charge gathered by the antenna feeder cable, and S2 represents the surface area of ​​the antenna feeder cable; The electrostatic discharge voltage calculation module specifically includes: A simplification submodule is used to ignore the port capacitance of the 5G base station equipment and simplify the electrostatic discharge voltage calculation function to U=(Q1+Q2) / C1; wherein U represents the electrostatic discharge voltage and C1 represents the antenna feed cable capacitance; The electrostatic discharge voltage acquisition submodule is used to obtain the electrostatic discharge voltage of the DC transmission line to be tested based on the space charge gathered by the metal plate of the 5G antenna to be tested, the charge gathered by the antenna feed cable to be tested, and the capacitance of the antenna feed cable to be tested, using a simplified electrostatic discharge voltage calculation function.

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