WO2024011763A1

WO2024011763A1 - Method for evaluating lightning protection performance of shared tower

Info

Publication number: WO2024011763A1
Application number: PCT/CN2022/123205
Authority: WO
Inventors: 黄欢; 冯圣勇; 李斌; 刘磊; 吴建蓉; 杨旗; 毛先胤; 曾华荣; 肖艳红; 余思伍; 彭赤; 张露松; 张义钊; 李恩文; 潘锐健; 厉天威
Original assignee: 贵州电网有限责任公司电力科学研究院; 南方电网科学研究院有限责任公司
Priority date: 2022-07-15
Filing date: 2022-09-30
Publication date: 2024-01-18
Also published as: CN115221702A

Abstract

A method for evaluating the lightning protection performance of a shared tower. The method comprises: acquiring an information set corresponding to a shared tower, wherein the shared tower comprises a communication base station and an electric pole and tower, and the information set comprises a grounding mode of a shared tower grounding grid, the relative position between the communication base station and the electric pole and tower in the shared tower, the soil resistivity at the position where the shared tower is located, and the grounding resistance of the shared tower; and evaluating the lightning protection performance of the shared tower according to the information set. On this basis, the method can accurately complete the evaluation of the lightning protection performance of the shared tower by means of the comprehensive consideration of information such as the grounding mode of the shared tower grounding grid, the relative position between the communication base station and the electric pole and tower in the shared tower, the soil resistivity at the position where the shared tower is located, and the grounding resistance of the shared tower.

Description

An evaluation method for lightning protection performance of shared towers

This application claims priority to the Chinese patent application submitted to the China Patent Office on July 15, 2022, with the application number 202210831100.3 and the invention title "Evaluation Method for Lightning Protection Performance of Shared Towers", the entire content of which is incorporated into this application by reference. middle.

Technical field

This application relates to the field of shared towers, and more specifically, to a method for evaluating the lightning protection performance of shared towers.

Background technique

Shared towers refer to building communication base stations on the basis of power poles. That is, the shared towers include both power poles and communication base stations. Since shared towers can realize resource integration and save national resources, the number of shared towers is increasing. In the normal use and operation of shared towers, it is essential to ensure the safe and stable operation of the power system and communication system. The lightning protection performance is an important condition for the safe and stable operation of the tower. Therefore, how to evaluate the lightning protection performance of a shared tower to better build shared towers has become a focus of attention.

In summary, there is an urgent need for a method to evaluate the lightning protection performance of a shared tower to better build shared towers.

Contents of the invention

In view of this, this application provides a method for evaluating the lightning protection performance of a shared tower, which is used to evaluate the lightning protection performance of a shared tower to better build shared towers.

In order to achieve the above objectives, the following solutions are proposed:

An evaluation method for the lightning protection performance of shared towers, including:

Obtain the information set corresponding to the shared tower;

Wherein, the shared tower includes a communication base station and a power tower, and the information set includes the grounding method of the shared tower ground network, the relative position of the communication base station and the power tower in the shared tower, and the soil where the shared tower is located. Resistivity and ground resistance of shared towers;

According to the information collection, the lightning protection performance of the shared tower is evaluated.

Optionally, evaluate the lightning protection performance of the shared tower based on the information set, including:

According to the information set, determine whether the grounding method of the shared tower ground network is joint grounding;

If the grounding method is joint grounding, determine whether the communication base station in the shared tower is located below the power tower according to the information set;

If the communication base station is located below the power tower, obtain the ground grid potential difference, step voltage upper limit and contact voltage upper limit of the power tower;

Evaluate the lightning protection performance of the shared tower based on the ground grid potential difference, the upper limit of step voltage and the upper limit of contact voltage of the power tower;

If the communication base station is located above the power tower, obtain the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station and the upper limit of the insulation breakdown voltage;

The lightning protection performance of the shared tower is evaluated based on the potential difference between the ground network of the communication base station and the place where the antenna of the communication base station is hung and the upper limit of the insulation breakdown voltage.

Optionally, evaluate the lightning protection performance of the shared tower based on the ground grid potential difference, the upper limit of step voltage and the upper limit of contact voltage of the power tower, including:

Determine whether the ground grid potential difference of the power tower is less than the upper limit of the step voltage and the upper limit of the contact voltage;

If the ground-grid potential difference of the power tower is less than both the step voltage upper limit and the contact voltage upper limit, it is determined that the lightning protection performance of the shared tower is qualified;

If the ground-grid potential difference of the power tower is not less than the upper limit of the step voltage and/or the upper limit of the contact voltage, it is determined that the lightning protection performance of the shared tower is unqualified.

Optionally, evaluate the lightning protection performance of the shared tower based on the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station and the upper limit of the insulation breakdown voltage, including:

Determine whether the potential difference between the ground network of the communication base station and the antenna hanging location of the communication base station is less than the upper limit of the insulation breakdown voltage;

If it is less than, it is determined that the lightning protection performance of the shared tower is qualified;

If it is not less than, the lightning protection performance of the shared tower is determined to be unqualified.

Optionally, obtain the ground grid potential difference of the power tower, including:

In response to the user's operation of building a simulation model, build a simulation model of the shared tower;

In response to the user's operation of injecting lightning current into the shared tower, inject the simulated lightning current into the simulation model of the shared tower;

The maximum voltage difference between the ground grid of the power pole tower in the simulation model of the shared tower is used as the ground grid potential difference of the power pole tower.

Optionally, obtain the upper limit value of the step voltage and the upper limit value of the contact voltage, including:

From the information collection, obtain the soil resistivity at the location of the shared tower;

Obtain the power surface attenuation coefficient and fault current duration of the shared tower;

Using the soil resistivity at the location of the shared tower, the power surface attenuation coefficient of the shared tower and the duration of the fault current, as well as the calculation formulas for the preset upper limit of step voltage and upper limit of contact voltage, The upper limit value of the step voltage and the upper limit value of the contact voltage are calculated.

Optionally, obtaining the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station includes:

Calculate the difference between the lowest voltage of the simulated ground network of the simulation model of the shared tower and the voltage at the antenna hanging point of the communication base station, and use the difference as the difference between the ground network of the common communication base station and the The potential difference at the antenna mounting point of the communication base station.

Optionally, obtain the upper limit of insulation breakdown voltage, including:

Obtain the distance and relative air density between the power tower and the antenna hanging place;

The upper limit of the insulation breakdown voltage is calculated using the distance between the power tower and the place where the antenna is hung, the relative air density, and a preset calculation formula for the upper limit of the insulation breakdown voltage.

Optionally, after determining whether the grounding method of the shared tower ground network is joint grounding based on the information set, it also includes:

If the grounding method of the shared tower ground network is not joint grounding, determine whether the soil resistivity at the location of the shared tower is less than the preset resistivity threshold based on the information set;

If the soil resistivity is less than the preset resistivity threshold, determine whether the grounding resistance of the shared tower is less than the preset resistance threshold based on the information set;

If the grounding resistance is less than the resistance threshold, it is determined that the lightning protection performance of the shared tower is qualified.

Optional, also includes:

If the soil resistivity is not less than the preset resistivity threshold, it is determined that the lightning protection performance of the shared tower is unqualified;

If the grounding resistance is not less than the resistance threshold, it is determined that the lightning protection performance of the shared tower is unqualified.

It can be seen from the above technical solution that in the evaluation method of the lightning protection performance of the shared tower provided by this application, the shared tower to be evaluated consists of a communication base station and a power tower; considering that lightning current will eventually flow into the earth through the ground network, therefore, it can Obtain the grounding method of the shared tower ground network, the soil resistivity at the location of the shared tower and the grounding resistance of the shared tower. Considering that there is a large difference between the voltage resistance performance of power towers and communication base stations, power towers and Communication base stations have different emphasis on lightning protection. Therefore, when evaluating the lightning protection performance of a shared tower, you can also obtain the grounding method of the shared tower ground network to adjust the evaluation method according to the different grounding methods. Based on this, an information set related to the shared tower can be obtained. The information set includes the grounding method of the shared tower ground network, the relative position of the communication base station and the power tower in the shared tower, and the location of the shared tower. Soil resistivity and grounding resistance of the shared tower, and based on the information collection, the lightning protection performance of the shared tower is evaluated. Based on this, this application can comprehensively consider information such as the grounding method of the shared tower ground network, the relative position of the communication base station and the power tower in the shared tower, the soil resistivity at the location of the shared tower, and the grounding resistance of the shared tower. , accurately complete the evaluation of the lightning protection performance of the shared tower.

In addition, after setting the evaluation method of the lightning protection performance of the shared tower in this application, when constructing the shared tower, you can refer to the evaluation method of the lightning protection performance of the shared tower in this application to better design the construction plan of the new shared tower. In this way, a more scientific, economical and resource-saving shared tower can be built.

Description of drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only This is an embodiment of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without exerting creative efforts.

Figure 1 is a flow chart of a method for evaluating the lightning protection performance of a shared tower disclosed in this application;

Figure 2 is a flow chart of another method for evaluating the lightning protection performance of a shared tower disclosed in this application;

Figure 3 is a schematic diagram of voltage simulation of a communication base station ground network monitoring point disclosed in this application;

Figure 4 is a schematic diagram of the voltage simulation of the monitoring point at the antenna hanging place disclosed in this application.

Figure 5 is a structural block diagram of a device for evaluating the lightning protection performance of a shared tower disclosed in this application;

Figure 6 is a hardware structure block diagram of a shared tower lightning protection performance evaluation device disclosed in this application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

The shared iron tower in this application is composed of a power pole tower and a communication base station. It is equivalent to the power pole tower replacing the communication pole tower required by the communication base station on the basis of maintaining power transmission to achieve resource integration and save resources.

When a shared tower suffers a lightning strike, a huge lightning current will flow into the ground along the shared tower. Due to the capacitance, inductance and ground resistance on the steel support structure of the shared tower, potential differences will occur at different locations on the shared tower. When the potential difference approaches or reaches the withstand voltage of the communication base station, some equipment of the communication base station will breakdown, causing equipment failure of the communication base station. In addition, when the shared tower suffers from local leakage under the influence of lightning strikes, the potential of the shared tower will rise, threatening the personal safety of transportation and inspection personnel. Based on this, the evaluation of the lightning protection performance of shared towers needs to be focused.

Next, the evaluation method of the lightning protection performance of the shared tower in this application will be introduced in detail in conjunction with Figure 1, including the following steps:

Step S1: Obtain the information set corresponding to the shared tower.

Specifically, the content of the information collection can be obtained through on-site investigation; it can also be obtained through querying the design documents of the shared tower.

The information set may include the grounding method of the shared tower ground network, the relative position of the communication base station and the power tower in the shared tower, the soil resistivity at the location of the shared tower, and the grounding resistance of the shared tower.

The grounding method of the shared tower ground network can be joint grounding, that is, the communication base station and the power tower are jointly grounded, or it can be separate grounding, that is, the power tower and the communication receiving station are both directly grounded without joint grounding.

The relative position of the communication base station and the power tower in the shared tower may be that the communication base station is located above or below the power tower.

Step S2: Evaluate the lightning protection performance of the shared tower based on the information set.

Specifically, refer to the above information collection and combine it with industry standards such as the lightning protection and grounding engineering design specifications for communications bureau stations, the lightning protection and grounding engineering design specifications for communications bureau stations, and the grounding design specifications for AC electrical devices, to comprehensively evaluate the protection of shared towers. Thunder performance.

It can be seen from the above technical solution that in the evaluation method of the lightning protection performance of the shared tower provided by the embodiment of the present application, the shared tower to be evaluated consists of a communication base station and a power tower; considering that lightning current will eventually flow into the earth through the ground network, therefore , it is possible to obtain the grounding method of the shared tower ground network, the soil resistivity at the location of the shared tower and the grounding resistance of the shared tower. Considering that there is a large difference between the voltage resistance performance of power towers and communication base stations, the power Towers and communication base stations have different emphasis on lightning protection. Therefore, when evaluating the lightning protection performance of shared towers, you can also obtain the grounding method of the shared tower ground network to adjust the evaluation method according to the different grounding methods. Based on this, an information set related to the shared tower can be obtained. The information set includes the grounding method of the shared tower ground network, the relative position of the communication base station and the power tower in the shared tower, and the location of the shared tower. Soil resistivity and grounding resistance of the shared tower, and based on the information collection, the lightning protection performance of the shared tower is evaluated. Based on this, this application can comprehensively consider information such as the grounding method of the shared tower ground network, the relative position of the communication base station and the power tower in the shared tower, the soil resistivity at the location of the shared tower, and the grounding resistance of the shared tower. , accurately complete the evaluation of the lightning protection performance of the shared tower.

This application can be combined with industry specifications such as information collection, communication bureau station lightning protection and grounding engineering design specifications, communication bureau station lightning protection and grounding engineering design specifications, and AC electrical device grounding design specifications to comprehensively evaluate the lightning protection performance of the shared tower and improve This application evaluates the reliability and accuracy of the lightning protection performance of shared towers.

Next, step S2 and the process of evaluating the lightning protection performance of the shared tower based on the information collection will be described in detail with reference to Figure 2. The specific steps are as follows:

Step S20: Based on the information set, determine whether the grounding method of the shared tower ground network is joint grounding. If yes, execute step S21. If not, execute step S26.

Specifically, the information set may include the grounding method of the shared tower ground network. It is determined whether the grounding method is joint grounding. If so, step S21 is executed. If not, step S26 is executed.

Step S21: Based on the information set, determine whether the communication base station in the shared tower is located below the power tower. If so, perform step S22. If not, perform step S24.

Specifically, if the grounding method is joint grounding, the relative positions of the communication base station and the power tower in the shared tower can be directly determined. When the communication base station in the shared iron tower is located below the power pole tower, step S22 is executed. If the communication base station in the shared iron tower is located above the power pole tower, step S24 is executed.

Step S22: Obtain the ground grid potential difference, step voltage upper limit and contact voltage upper limit of the power pole tower.

Specifically, if the communication base station is located below the power tower, the voltage difference between the ground network of the communication base station and the place where the antenna is hung will generally not exceed the upper voltage limit of the communication equipment, and is generally lower than the insulation breakdown voltage. Upper limit. Based on this, what needs to be focused on during the evaluation process is the lightning protection performance of the ground network of power towers.

Step S23: Evaluate the lightning protection performance of the shared tower based on the ground grid potential difference, the upper limit of step voltage and the upper limit of contact voltage of the power tower.

Specifically, the ground grid potential difference of the power tower can be compared with the upper limit of the step voltage and the upper limit of the contact voltage, and based on the comparison results, the lightning protection performance of the shared tower can be evaluated.

Among them, the step voltage refers to the voltage difference that the power tower ground network can withstand. When the voltage difference of the power tower ground network exceeds the upper limit of the step voltage, it is easy to cause damage to the power tower ground network.

Contact voltage refers to the voltage difference that shared tower maintenance personnel can withstand when they touch the shared tower. Once the contact voltage is too high, maintenance personnel may be in danger.

Step S24: Obtain the potential difference between the ground network of the communication base station and the place where the antenna of the communication base station is hung and the upper limit of the insulation breakdown voltage.

Specifically, when the communication base station is located above the power tower, the ground grid potential difference of the power tower generally does not exceed the upper limit of the step voltage and the upper limit of the contact voltage. Based on this, what needs to be focused on during the evaluation process is the lightning protection performance of the ground network of the communication base station.

Step S25: Evaluate the lightning protection performance of the shared tower based on the potential difference between the ground network of the communication base station and the place where the antenna of the communication base station is hung and the upper limit of the insulation breakdown voltage.

Specifically, the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station can be compared with the upper limit of the insulation breakdown voltage, and the lightning protection performance of the shared tower can be evaluated based on the comparison results.

Among them, when the potential difference between the ground network of the communication base station and the place where the antenna of the communication base station is hung exceeds the upper limit of the insulation breakdown voltage, it is easy to breakdown the communication equipment and cause communication failure.

Step S26: Based on the information set, determine whether the soil resistivity at the location of the shared tower is less than a preset resistivity threshold. If yes, step S27 is executed. If not, step S29 is executed.

Specifically, if the grounding method of the shared tower ground network is not joint grounding, it is necessary to determine whether the soil resistivity at the location of the shared tower meets the lightning protection requirements. If it meets the lightning protection requirements, perform step S27. If it does not meet the lightning protection requirements, If required, step S29 is executed.

Among them, according to the communication bureau station lightning protection and grounding engineering design specifications, the resistivity threshold to be preset can be 1000Ω·m.

Step S27: Based on the information set, determine whether the grounding resistance of the shared tower is less than a preset resistance threshold. If yes, step S28 is executed. If not, step S29 is executed.

Specifically, if the soil resistivity is less than the preset resistivity threshold, it can be determined whether the ground resistance of the shared tower is less than the preset resistance threshold. If the ground resistance of the shared tower is less than the preset resistance threshold, Step S28 may be performed. If the grounding resistance of the shared tower is greater than the preset resistance threshold, step S29 may be performed.

Among them, the resistance threshold can be set according to industry standards and actual experience. For example, the resistance threshold can be preset by integrating the design specifications for lightning protection and grounding engineering of communication bureau stations and the grounding design specifications of AC electrical devices. Generally, the preset resistance threshold can be 20Ω.

Step S28: Determine that the lightning protection performance of the shared tower is qualified.

Specifically, if the grounding resistance is less than the resistance threshold, it can be considered that the lightning protection performance of the shared tower is good, and the lightning protection performance of the shared tower is qualified.

Step S29: Determine that the lightning protection performance of the shared tower is unqualified.

Specifically, if the ground resistance is not less than the resistance threshold, the ground resistance of the shared tower is too large and lightning protection failure is prone to occur, and the lightning protection performance of the shared tower can be considered unqualified.

Step S30: Determine that the lightning protection performance of the shared tower is unqualified.

Specifically, according to the communication bureau station lightning protection and grounding engineering design specifications, if the soil resistivity at the location of the shared tower is not less than 1000Ω·m, radiating horizontal grounding bodies need to be laid at the four corners, which will seriously damage the existing The shared tower ground network, therefore, when the soil resistivity is not less than the preset resistivity threshold, the lightning protection performance of the shared tower can be considered unqualified.

It can be seen from the above technical solutions that this embodiment provides an optional way to evaluate the lightning protection performance of shared towers based on information collection. Through the above method, industry standards and actual parameters of shared towers can be referred to to comprehensively evaluate shared towers. The lightning protection performance of the tower makes the evaluation process more reliable and the evaluation results more accurate.

In some embodiments of the present application, the process of obtaining the ground grid potential difference of the power tower in step S22 is described in detail. The steps are as follows:

S220. In response to the user's operation of building a simulation model, build a simulation model of the shared tower.

Specifically, the information set may also include various parameters of the shared tower. After the user starts the simulation model building process, the simulation model of the shared tower can be constructed based on each parameter of the shared tower.

Among them, the simulation software can be CDEGS software.

S221. In response to the user's operation of injecting lightning current into the simulation of the shared tower, inject the simulated lightning current into the simulation model of the shared tower.

Specifically, since it is an evaluation of lightning protection performance, lightning current can be injected into the simulation model of the shared tower to better evaluate the lightning protection performance of the shared tower.

S222. Use the maximum voltage difference of the power pole and ground grid in the simulation model of the shared tower as the ground grid potential difference of the power pole tower.

Specifically, after injecting lightning current, Fourier transform analysis in the simulation software can be used to check the voltage of each monitoring point of the power pole and tower ground network, select the minimum voltage monitoring point and the maximum voltage monitoring point, and use the minimum voltage and The voltage difference of the maximum voltage is used as the ground grid potential difference.

Among them, since the injection of lightning current is not a continuous operation, the voltage of each monitoring point fluctuates. When calculating the ground potential difference, the voltage at the wave peak shall prevail, that is, the voltage peak value of the minimum voltage monitoring point and the maximum voltage monitoring The voltage difference between the voltage peaks at the points is used as the ground grid potential difference.

In order to ensure the accuracy of the ground grid voltage difference, the process of injecting different lightning currents and calculating the ground grid voltage difference can be repeated multiple times to obtain multiple ground grid potential differences, and the average of the multiple ground grid potential differences is used as the final ground grid potential difference. Network potential difference.

It can be seen from the above technical solution that this embodiment provides an optional way to obtain the ground grid potential difference of the power tower. Through the above method, the accuracy of the ground grid potential difference can be further ensured, thereby ensuring the shared tower defense Reliability and accuracy of lightning performance testing.

In some embodiments of the present application, the process of obtaining the upper limit value of the step voltage and the upper limit value of the contact voltage in step S22 is described in detail. The steps are as follows:

S223. Obtain the soil resistivity at the location of the shared tower from the information set.

Specifically, the information set contains the soil resistivity at the location of the shared tower, and the soil resistivity can be obtained directly from the information set.

S224. Obtain the power surface attenuation coefficient and the duration of the fault current of the shared tower.

Specifically, the information set may also include the power surface attenuation coefficient of the shared tower and the duration of the fault current. The power surface attenuation coefficient of the shared tower and the duration of the fault current can be obtained by querying the design file of the power tower in the shared tower. collection of information.

S225. Calculation using the soil resistivity at the location of the shared tower, the power surface attenuation coefficient of the shared tower and the duration of the fault current, as well as the preset upper limit of step voltage and upper limit of contact voltage. Formula to calculate the upper limit of the step voltage and the upper limit of the contact voltage.

Specifically, the calculation formula for the upper limit of contact voltage is as follows:

The calculation formula for the upper limit of step voltage is as follows:

Among them, U _t is the upper limit of contact voltage, in v; U _s is the upper limit of step voltage, in v; ρ _s is the soil resistivity at the location of the shared tower, in Ω·m; C _{s is} the shared tower The power surface attenuation coefficient; t _s the duration of the fault current, the unit is S.

It can be seen from the above technical solution that this embodiment provides an optional method of obtaining the upper limit value of the step voltage and the upper limit value of the contact voltage. Through the above method, the upper limit of step voltage and the upper limit of contact voltage can be calculated comprehensively from the soil resistivity, current surface layer attenuation coefficient and fault current duration, so that the upper limit of step voltage and the upper limit of contact voltage can be obtained It has more reference significance, making the evaluation of the lightning protection performance of the shared tower more reliable.

In some embodiments of the present application, step S23, the process of evaluating the lightning protection performance of the shared tower based on the ground grid potential difference, the upper limit of the step voltage and the upper limit of the contact voltage of the power tower is detailed. Instructions, the steps are as follows:

S230. Determine whether the ground grid potential difference of the power pole tower is less than the upper limit of the step voltage and the upper limit of the contact voltage. If yes, execute step S231. If not, execute step S232.

Specifically, the ground grid potential difference can be compared with the calculated upper limit of the step voltage and the upper limit of the contact voltage of the power tower.

S231. Determine that the lightning protection performance of the shared tower is qualified.

Specifically, if the ground-grid potential difference of the power tower is less than both the step voltage upper limit and the contact voltage upper limit, it can be considered that the lightning protection performance of the shared tower is better.

S232. Determine that the lightning protection performance of the shared tower is unqualified.

Specifically, if the ground grid potential difference of the power pole tower is not less than the upper limit of the step voltage and/or the upper limit of the contact voltage, it can be considered that the lightning protection performance of the shared tower is poor.

It can be seen from the above technical solution that this embodiment provides a method for evaluating the lightning protection performance of the shared tower based on the ground grid potential difference, the upper limit of step voltage and the upper limit of contact voltage of the power tower. The selection method uses the upper limit value of step voltage and the upper and lower value of contact voltage as reference standards, taking into account the safety issues of equipment and maintenance personnel when lightning is injected, further ensuring the safety of shared towers.

In some embodiments of the present application, the process of obtaining the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station in step S24 is described in detail. The steps are as follows:

S240. In response to the user's operation of building a simulation model, build a simulation model of the shared tower.

Specifically, the simulation model of the shared tower that needs to be evaluated for lightning protection performance can be constructed in the simulation software.

S241. In response to the user's operation of injecting lightning current into the shared tower, inject the simulated lightning current into the simulation model of the shared tower.

Specifically, lightning current can be injected into the simulation model of the shared tower multiple times.

S242. Calculate the difference between the lowest voltage of the simulated ground network of the simulation model of the shared tower and the voltage at the antenna hanging point of the communication base station, and use the difference as the difference between the ground network of the common communication base station and The potential difference at the place where the antenna of the communication base station is hung.

When calculating the voltage difference between the communication base station ground network and the antenna hanging place, you can check the voltage of each monitoring point on the communication base station ground network and select the monitoring point with the smallest voltage; check the voltage of each monitoring point at the antenna hanging place. , select the monitoring point with the maximum voltage.

Fourier transform analysis can be used to obtain the voltage waveform of the minimum voltage monitoring point, as shown in Figure 3, and the voltage waveform of the maximum voltage monitoring point, as shown in Figure 4. Due to the injection of lightning current, the shared tower will In the simulation model, the communication base station ground network and the instantaneous change in the potential of the antenna hanging place can be calculated. Therefore, the difference between the peak values of the voltage waveform can be calculated. That is, the peak value and maximum value of the voltage waveform corresponding to the monitoring point of the minimum voltage can be calculated. The difference between the peak values of the voltage waveform corresponding to the voltage monitoring points.

As shown in Figure 3 and Figure 4, under the injection of lightning current, the voltage of each monitoring point rose sharply and dropped sharply, and finally recovered gently.

It can be seen from the above technical solution that this embodiment provides an optional way to collect the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station. Through the above method, the collected potential difference can be made more reference Meaning, making the evaluation results of lightning protection performance more accurate and reliable.

In some embodiments of the present application, the process of obtaining the upper limit of the insulation breakdown voltage in step S24 is described in detail. The steps are as follows:

S243. Obtain the distance and relative air density between the power pole tower and the antenna hanging place.

Specifically, the information set may include the distance between the power tower and the place where the antenna is hung and the relative air density. When obtaining the information set on the distance between the power tower and the place where the antenna is hung and the relative air density, the information set can be obtained on-site. Obtained by survey; it can also be obtained by querying the design files of the shared tower.

S244. Calculate the upper limit of the insulation breakdown voltage using the distance between the power tower and the place where the antenna is hung, the relative air density, and the preset calculation formula for the upper limit of the insulation breakdown voltage. .

Specifically, the calculation formula for the upper limit of insulation breakdown voltage is as follows:

Among them, U _d is the upper limit of the insulation breakdown voltage, in kv; d is the distance between the power tower and the antenna hanging place, in cm; σ is the relative air density, generally taking a value of 0.75×10 ^{- 3} .

It can be seen from the above technical solution that this embodiment provides an optional method for calculating the upper limit of the insulation breakdown voltage. Through the above method, you can refer to the height difference between the power tower and the antenna hanging club of the shared tower and The relative air density is calculated to obtain the upper limit of the insulation breakdown voltage to improve the reliability of evaluating the lightning protection performance of shared towers.

In some embodiments of the present application, for step S25, the shared tower is evaluated based on the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station and the upper limit of the insulation breakdown voltage. The process of lightning protection performance is explained in detail, the steps are as follows:

S250. Determine whether the potential difference between the ground network of the communication base station and the antenna hanging location of the communication base station is less than the upper limit of the insulation breakdown voltage. If yes, execute step S251. If not, execute step S252.

S251. Determine that the lightning protection performance of the shared tower is qualified.

Specifically, when the potential difference between the ground network of the communication base station and the antenna hanging location of the communication base station is less than the upper limit of the insulation breakdown voltage, it can be considered that the lightning protection performance of the shared tower is better.

S252. Determine that the lightning protection performance of the shared tower is unqualified.

Specifically, when the potential difference between the ground network of the communication base station and the antenna hanging location of the communication base station is not less than the upper limit of the insulation breakdown voltage, the lightning protection performance of the shared tower can be considered to be poor.

It can be seen from the above technical solution that this embodiment provides a method to evaluate the voltage difference between the ground network of the communication base station and the antenna hanging place of the communication base station and the upper limit of the insulation breakdown voltage. An optional way to share the lightning protection performance of the tower. Through the above method, the potential difference at the antenna hanging point of the communication base station and the upper limit of the insulation breakdown voltage can be comprehensively considered during the evaluation process, so as to make the evaluation results more accurate. for accuracy.

Next, the evaluation device for the lightning protection performance of a shared tower provided by the embodiment of the present application will be introduced in detail. The device for evaluating the lightning protection performance of a shared tower below and the method for evaluating the lightning protection performance of a shared tower above can be referenced in correspondence with each other.

Referring to Figure 5, the evaluation device of the lightning protection performance of the shared tower can include:

Acquisition unit 1, used to acquire the information set corresponding to the shared tower;

Evaluation unit 2 is configured to evaluate the lightning protection performance of the shared tower based on the information set.

Further, the evaluation unit may include:

A joint grounding judgment unit, configured to judge whether the grounding method of the shared tower ground network is joint grounding based on the information set;

A relative position judgment unit, configured to judge whether the communication base station in the shared tower is located below the power tower according to the information set if the grounding method is joint grounding;

A ground grid potential difference acquisition unit, configured to obtain the ground grid potential difference, step voltage upper limit and contact voltage upper limit of the power tower if the communication base station is located below the power tower;

A ground grid potential difference utilization unit is used to evaluate the lightning protection performance of the shared tower based on the ground grid potential difference, step voltage upper limit and contact voltage upper limit of the power tower;

An upper limit value acquisition unit, configured to obtain the upper limit of the potential difference and insulation breakdown voltage between the ground network of the communication base station and the antenna hanging place of the communication base station if the communication base station is located above the power tower. value;

The upper limit value utilization unit is used to evaluate the lightning protection performance of the shared tower based on the potential difference between the ground network of the communication base station and the place where the antenna of the communication base station is hung and the upper limit of the insulation breakdown voltage.

Further, the ground grid potential difference utilization unit may include:

The first ground grid potential difference utilization unit is used to determine whether the ground grid potential difference of the power pole is less than the upper limit of the step voltage and the upper limit of the contact voltage;

The second ground grid potential difference utilization unit is used to determine the lightning protection of the shared tower if the ground grid potential difference of the power tower is less than the upper limit of the step voltage and the upper limit of the contact voltage. Performance is acceptable;

The third ground grid potential difference utilization unit is used to determine the voltage of the shared tower if the ground grid potential difference of the power tower is not less than the step voltage upper limit and/or the contact voltage upper limit. Lightning protection performance is unqualified.

Furthermore, the evaluation unit may also include:

A soil resistivity comparison unit, used to determine whether the soil resistivity at the location of the shared tower is less than a preset resistivity threshold based on the information set if the grounding method of the shared tower ground network is not joint grounding;

A ground resistance comparison unit configured to, if the soil resistivity is less than the preset resistivity threshold, determine whether the ground resistance of the shared tower is less than the preset resistance threshold based on the information set;

A qualification determination unit configured to determine that the lightning protection performance of the shared tower is qualified if the grounding resistance is less than the resistance threshold.

Furthermore, the evaluation unit may also include:

A resistivity threshold utilization unit configured to determine that the lightning protection performance of the shared tower is unqualified if the soil resistivity is not less than the preset resistivity threshold;

A ground resistance utilization unit is configured to determine that the lightning protection performance of the shared tower is unqualified if the ground resistance is not less than the resistance threshold.

Further, the upper limit value utilization unit may include:

The first upper limit value utilization unit is used to determine whether the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station is less than the upper limit of the insulation breakdown voltage;

The second upper limit value utilization unit is used to determine the protection level of the shared tower if the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station is less than the upper limit value of the insulation breakdown voltage. Lightning performance is qualified;

The third upper limit value utilization unit is used to determine the voltage of the shared tower if the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station is not less than the upper limit of the insulation breakdown voltage. Lightning protection performance is unqualified.

Further, the ground grid potential difference acquisition unit may include:

A model building unit, configured to respond to the user's operation of building a simulation model and build a simulation model of the shared tower;

A lightning current injection unit, configured to respond to the user's operation of injecting lightning current into the shared tower and inject the simulated lightning current into the simulation model of the shared tower;

The maximum voltage difference acquisition unit is configured to use the maximum voltage difference of the power pole and ground grid in the simulation model of the shared tower as the ground grid potential difference of the power pole and tower.

Further, the ground grid potential difference acquisition unit may include:

A soil resistivity acquisition unit, configured to acquire the soil resistivity at the location of the shared tower from the information collection;

A duration acquisition unit, used to acquire the power surface attenuation coefficient of the shared tower and the duration of the fault current;

The soil resistivity utilization unit is used to utilize the soil resistivity at the location of the shared tower, the power surface attenuation coefficient of the shared tower and the duration of the fault current, as well as the preset upper limit of step voltage and contact The calculation formula of the voltage upper limit value is used to calculate the step voltage upper limit value and the contact voltage upper limit value.

Further, the upper limit value acquisition unit may include:

A shared tower simulation unit, configured to respond to the user's operation of building a simulation model and build a simulation model of the shared tower;

A lightning current simulation unit, configured to respond to the user's operation of injecting lightning current into the shared tower and inject the simulated lightning current into the simulation model of the shared tower;

A difference calculation unit, configured to calculate the difference between the lowest voltage of the simulated ground network of the simulation model of the shared tower and the voltage at the antenna hanging place of the communication base station, and use the difference as the common The potential difference between the ground network of the communication base station and the place where the antenna of the communication base station is hung.

Further, the upper limit value acquisition unit may include:

A distance acquisition unit, used to acquire the distance and relative air density between the power tower and the antenna hanging place;

A distance utilization unit is used to calculate the insulation breakdown voltage using the distance between the power tower and the antenna hanging place and the relative air density, as well as a preset calculation formula for the upper limit of the insulation breakdown voltage. upper limit value.

The evaluation device for the lightning protection performance of a shared tower provided by the embodiment of the present application can be applied to evaluation equipment for the lightning protection performance of a shared tower, such as PC terminals, cloud platforms, servers, server clusters, etc. Optionally, Figure 6 shows a block diagram of the hardware structure of the evaluation equipment for the lightning protection performance of the shared tower. Referring to Figure 6, the hardware structure of the evaluation equipment for the lightning protection performance of the shared tower may include: at least one processor 1, at least one communication interface. 2. At least one memory 3 and at least one communication bus 4;

In the embodiment of the present application, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 complete communication with each other through communication bus 4;

The processor 1 may be a central processing unit CPU, or an application specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of the present invention, etc.;

Memory 3 may include high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory;

The memory stores a program, and the processor can call the program stored in the memory. The program is used for:

Obtain the information set corresponding to the shared tower;

Optionally, the detailed functions and extended functions of the program may refer to the above description.

Embodiments of the present application also provide a readable storage medium that can store a program suitable for execution by a processor, and the program is used for:

Obtain the information set corresponding to the shared tower;

Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or any such actual relationship or sequence between operations. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the application. Various embodiments of the present application can be combined with each other. Therefore, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A method for evaluating the lightning protection performance of shared towers, which is characterized by including:

Obtain the information set corresponding to the shared tower;

Wherein, the shared tower includes a communication base station and a power tower, and the information set includes the grounding method of the shared tower ground network, the relative position of the communication base station and the power tower in the shared tower, and the soil where the shared tower is located. Resistivity and ground resistance of shared towers;

According to the information collection, the lightning protection performance of the shared tower is evaluated.
The method for evaluating the lightning protection performance of a shared tower according to claim 1, characterized in that, according to the information set, evaluating the lightning protection performance of the shared tower includes:

According to the information set, determine whether the grounding method of the shared tower ground network is joint grounding;

If the grounding method is joint grounding, determine whether the communication base station in the shared tower is located below the power tower according to the information set;

If the communication base station is located below the power tower, obtain the ground grid potential difference, step voltage upper limit and contact voltage upper limit of the power tower;

Evaluate the lightning protection performance of the shared tower based on the ground grid potential difference, the upper limit of step voltage and the upper limit of contact voltage of the power tower;

If the communication base station is located above the power tower, obtain the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station and the upper limit of the insulation breakdown voltage;

The lightning protection performance of the shared tower is evaluated based on the potential difference between the ground network of the communication base station and the place where the antenna of the communication base station is hung and the upper limit of the insulation breakdown voltage.
The method for evaluating the lightning protection performance of a shared iron tower according to claim 2, wherein the lightning protection performance of the shared iron tower is evaluated based on the ground grid potential difference, the upper limit of the step voltage and the upper limit of the contact voltage of the power tower. Lightning protection performance, including:

Determine whether the ground grid potential difference of the power tower is less than the upper limit of the step voltage and the upper limit of the contact voltage;

If the ground-grid potential difference of the power tower is less than both the step voltage upper limit and the contact voltage upper limit, it is determined that the lightning protection performance of the shared tower is qualified;

If the ground-grid potential difference of the power tower is not less than the upper limit of the step voltage and/or the upper limit of the contact voltage, it is determined that the lightning protection performance of the shared tower is unqualified.
The evaluation method of lightning protection performance of a shared tower according to claim 2, characterized in that, based on the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station and the upper limit of the insulation breakdown voltage Values to evaluate the lightning protection performance of the shared tower, including:

Determine whether the potential difference between the ground network of the communication base station and the antenna hanging location of the communication base station is less than the upper limit of the insulation breakdown voltage;

If it is less than, it is determined that the lightning protection performance of the shared tower is qualified;

If it is not less than, the lightning protection performance of the shared tower is determined to be unqualified.
The method for evaluating the lightning protection performance of a shared tower according to claim 2, characterized in that obtaining the ground grid potential difference of the power tower includes:

In response to the user's operation of building a simulation model, build a simulation model of the shared tower;

In response to the user's operation of injecting lightning current into the shared tower, inject the simulated lightning current into the simulation model of the shared tower;

The maximum voltage difference between the ground grid of the power pole tower in the simulation model of the shared tower is used as the ground grid potential difference of the power pole tower.
The method for evaluating the lightning protection performance of a shared tower according to claim 2, characterized in that obtaining the upper limit value of the step voltage and the upper limit value of the contact voltage includes:

From the information collection, obtain the soil resistivity at the location of the shared tower;

Obtain the power surface attenuation coefficient and fault current duration of the shared tower;

Using the soil resistivity at the location of the shared tower, the power surface attenuation coefficient of the shared tower and the duration of the fault current, as well as the calculation formulas for the preset upper limit of step voltage and upper limit of contact voltage, The upper limit value of the step voltage and the upper limit value of the contact voltage are calculated.
The method for evaluating the lightning protection performance of a shared tower according to claim 2, characterized in that obtaining the potential difference between the ground network of the communication base station and the antenna hanging place of the communication base station includes:

In response to the user's operation of building a simulation model, build a simulation model of the shared tower;

In response to the user's operation of injecting lightning current into the shared tower, inject the simulated lightning current into the simulation model of the shared tower;

Calculate the difference between the lowest voltage of the simulated ground network of the simulation model of the shared tower and the voltage at the antenna hanging point of the communication base station, and use the difference as the difference between the ground network of the common communication base station and the The potential difference at the antenna hanging point of the communication base station.
The method for evaluating the lightning protection performance of a shared tower according to claim 2, characterized in that obtaining the upper limit of the insulation breakdown voltage includes:

Obtain the distance and relative air density between the power tower and the antenna hanging place;

The upper limit of the insulation breakdown voltage is calculated using the distance between the power tower and the place where the antenna is hung, the relative air density, and a preset calculation formula for the upper limit of the insulation breakdown voltage.
The method for evaluating the lightning protection performance of a shared tower according to claim 2, characterized in that, after determining whether the grounding method of the shared tower ground network is joint grounding based on the information set, it further includes:

If the grounding method of the shared tower ground network is not joint grounding, determine whether the soil resistivity at the location of the shared tower is less than the preset resistivity threshold based on the information set;

If the soil resistivity is less than the preset resistivity threshold, determine whether the grounding resistance of the shared tower is less than the preset resistance threshold based on the information set;

If the grounding resistance is less than the resistance threshold, it is determined that the lightning protection performance of the shared tower is qualified.
The method for evaluating lightning protection performance of shared towers according to claim 9, further comprising:

If the soil resistivity is not less than the preset resistivity threshold, it is determined that the lightning protection performance of the shared tower is unqualified;

If the grounding resistance is not less than the resistance threshold, it is determined that the lightning protection performance of the shared tower is unqualified.