Distribution line equivalent icing thickness calculation method and system

Abstract

The invention discloses a distribution line equivalent icing thickness calculation method and system. The method comprises the following steps: acquiring parameter information of a target distribution line; acquiring first data of a to-be-tested line in the target distribution line according to the parameter information, and calculating first stress of a target node in the to-be-tested line according to the first data; acquiring second data of a to-be-tested line in the target distribution line according to the first stress; and obtaining the equivalent icing thickness of the line according to the second data in combination with a preset quality obtaining strategy. According to the method, the calculation precision of the icing thickness can be effectively improved, and power failures caused by icing are reduced. By accurately calculating the equivalent icing thickness of the line, early warning and measures taking can be carried out in time, and line breakage and power interruption caused by overweight icing are avoided. The method has the advantages of being easy and convenient to operate and rapid in calculation, is suitable for distribution lines in various different environments, and improves the stability and reliability of a power system.

Description

Technical Field

[0001] The present invention relates to the technical field of disaster prevention and mitigation of power grids, and in particular to a method and system for calculating equivalent ice thickness of distribution lines. Background Art

[0002] In recent years, affected by the extreme global climate, icing disasters have frequently occurred in the south in winter. In the winter of 2022, the 10kV distribution lines of the State Grid Corporation of China were shut down 1,349 times due to ice disasters, affecting 1.7152 million users, 455 poles were broken, 118.776km of lines were broken, 4 distribution transformers were damaged, and 8 switches were damaged. Line overload and dancing caused by icing will lead to line breakage and pole breaking of distribution lines. Severe cases will cause large-scale line power outages, affect the stable operation of the power grid, and cause economic losses. As the basis and key to the anti-icing and de-icing work of power grid lines, it is of great significance to study the icing monitoring of distribution lines.

[0003] For overhead lines with a line voltage level of 35kV or above, weighing method, image recognition method and other technologies are often used to calculate the line ice thickness. The weighing method used by Huang Xinbo et al. is to replace the ball head hanging ring on the top of the insulator with a tension tilt sensor to measure the tension of the insulator string, the tilt angle along the line direction, and the angle between the wind deviation plane and the vertical plane, and then calculate the conductor ice weight or equivalent ice thickness under icing conditions. The conductor inclination method used by Xu Qingsong et al. is to use the inclination sensor installed at the outlet of the wire clamp to measure the conductor inclination, and calculate the horizontal tension of the conductor under icing conditions based on the state equation of the transmission line, and then calculate the equivalent ice thickness of the conductor. Patent-A method for calculating equivalent ice thickness based on image recognition (CN 117079037A), which judges the type of ice on the transmission line according to the real-time temperature, humidity, and wind speed conditions, and calculates the thickness of different ice types at different time periods through image recognition technology.

[0004] At present, the detection of ice thickness on distribution lines mainly adopts manual inspection and video monitoring. Manual ice observation has problems such as low efficiency, high cost and small coverage. When a large area of ​​the line is severely covered with ice, it is difficult to grasp the ice condition of the distribution line in a timely and accurate manner. Video monitoring technology has problems such as accuracy and camera fogging. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above existing problems, the present invention is proposed.

[0007] Therefore, the present invention provides a method and system for calculating the equivalent ice thickness of a distribution line, which can solve the problems mentioned in the background technology.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] In a first aspect, the present invention provides a method for calculating equivalent ice thickness of a distribution line, comprising:

[0010] Obtain parameter information of the target distribution line;

[0011] Acquire first data of a line to be tested in a target power distribution line according to the parameter information, and calculate a first stress of a target node in the line to be tested according to the first data;

[0012] Acquire second data of a line to be tested in a target power distribution line according to the first stress;

[0013] According to the second data and in combination with a preset quality acquisition strategy, the equivalent ice thickness of the line is obtained.

[0014] As a preferred solution of the method for calculating equivalent ice thickness of distribution lines of the present invention, the method of obtaining first data of the line to be tested in the target distribution line according to the parameter information includes:

[0015] The line to be tested is one or more lines connected to any insulator string in the target distribution line;

[0016] All insulator strings in the target distribution line are of equal height or unequal height.

[0017] As a preferred solution of the method for calculating equivalent ice thickness of distribution lines of the present invention, the method of obtaining second data of the line to be tested in the target distribution line according to the first stress includes:

[0018] When the insulator strings on both sides of the line to be tested in the target distribution line are of equal height, the second data of the line to be tested in the target distribution line does not change with whether the line is covered with ice or not;

[0019] When the insulator strings on both sides of the line to be tested in the target distribution line are not of equal height, the second data of the line to be tested in the target distribution line changes depending on whether the line is covered with ice.

[0020] As a preferred solution of the method for calculating equivalent ice thickness of distribution lines of the present invention, the method of obtaining first data of the line to be tested in the target distribution line according to the parameter information further includes:

[0021] According to the parameter information, the conductor length when the line to be tested is installed, the temperature expansion coefficient of the conductor, the ambient temperature when ice is applied, and the design temperature of the conductor are obtained;

[0022] According to the temperature expansion coefficient of the conductor, the ambient temperature when ice is applied, and the design temperature of the conductor, the difference between the conductor when erected and the conductor when ice is applied is obtained;

[0023] According to the wire length and the wire difference when the line to be tested is installed, first data of the line to be tested in the target power distribution line is obtained.

[0024] As a preferred solution of the method for calculating equivalent ice thickness of distribution lines of the present invention, the calculation of the first stress of the target node in the line to be tested according to the first data includes:

[0025] The target node is the lowest point in the line to be tested;

[0026] The first stress is solved by means of the horizontal span, the height difference angle, the conductor deadweight load ratio and the first data.

[0027] As a preferred solution of the method for calculating equivalent ice thickness of distribution lines of the present invention, the method of obtaining second data of the line to be tested in the target distribution line according to the first stress also includes:

[0028] When the insulator strings on both sides of the line to be tested in the target distribution line are not of equal height, the second data of the line to be tested in the target distribution line is solved by means of the horizontal span, the height difference angle and the conductor deadweight load ratio.

[0029] As a preferred solution of the method for calculating the equivalent ice thickness of a distribution line according to the present invention, the method of obtaining the equivalent ice thickness of the line according to the second data in combination with a preset quality acquisition strategy includes:

[0030] Establish a relationship model between the ice weight per unit length of the line and the measured value of the pressure sensor, the deadweight of the insulator string, the acceleration of gravity, and the deadweight per unit length of the conductor;

[0031] Obtain the measured value of the pressure sensor, the deadweight of the insulator string, the gravity acceleration, and the deadweight per unit length of the conductor;

[0032] The ice weight per unit length of the line is obtained based on the obtained measurement value of the pressure sensor, the deadweight of the insulator string, the gravity acceleration and the deadweight per unit length of the conductor;

[0033] The equivalent ice thickness of the line is obtained according to the ice weight per unit length of the line.

[0034] In a second aspect, the present invention provides a distribution line equivalent ice thickness calculation system, comprising:

[0035] A data acquisition module, used to obtain parameter information of a target distribution line;

[0036] A first calculation module, configured to obtain first data of a line to be tested in a target power distribution line according to the parameter information, and calculate a first stress of a target node in the line to be tested according to the first data;

[0037] A second calculation module, used for acquiring second data of a line to be tested in a target power distribution line according to the first stress;

[0038] The third calculation module is used to obtain the equivalent ice thickness of the line according to the second data in combination with a preset quality acquisition strategy.

[0039] In a third aspect, the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned method when executing the computer program.

[0040] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the method described above when executed by a processor.

[0041] Compared with the prior art, the invention has the following beneficial effects: the invention proposes a method and system for calculating the equivalent ice thickness of a distribution line, obtaining parameter information of a target distribution line; obtaining first data of a line to be tested in the target distribution line according to the parameter information, and calculating the first stress of a target node in the line to be tested according to the first data; obtaining second data of a line to be tested in the target distribution line according to the first stress; and obtaining the equivalent ice thickness of the line according to the second data in combination with a preset quality acquisition strategy. The method and system for calculating the equivalent ice thickness of a distribution line of the present application can effectively improve the calculation accuracy of the ice thickness and reduce power failures caused by ice. By accurately calculating the equivalent ice thickness of the line, timely warnings and measures can be taken to avoid line breakage and power outages caused by excessive ice. The calculation method and system of the present application have the characteristics of simple operation and fast calculation, are applicable to distribution lines in various environments, and improve the stability and reliability of the power system. The implementation of the present application can not only improve the operating efficiency of the power system, but also provide a scientific basis for the maintenance and management of the power system, with significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative labor. Among them:

[0043] Figure 1 A method flow chart of a method and system for calculating equivalent ice thickness of a distribution line provided by an embodiment of the present invention;

[0044] Figure 2 A calculation model diagram of a method and system for calculating equivalent ice thickness of a distribution line provided by an embodiment of the present invention;

[0045] Figure 3 An internal structural diagram of a computer device of a method and system for calculating equivalent ice thickness of distribution lines provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0047] Example 1

[0048] Reference Figure 1-Figure 3 , which is the first embodiment of the present invention, provides a method and system for calculating equivalent ice thickness of a distribution line, including:

[0049] There are some problems in the existing related technologies, such as low calculation accuracy, complex calculation process, and difficulty in adapting to distribution lines in different environments.

[0050] The present application provides a method that can effectively solve the above-mentioned problems. Next, multiple embodiments will be combined to explain in detail how to implement the method for calculating the equivalent ice thickness of the distribution line.

[0051] Figure 1 A method flow chart of a method and system for calculating equivalent ice thickness of a distribution line is shown, including:

[0052] S101, obtaining parameter information of a target distribution line;

[0053] In an optional embodiment, there are many kinds of different parameter information in the distribution line, and these parameter information are related to the length of the line or the thickness of the ice, such as the model of the insulator string, the model of the conductor, the tension of the conductor, the ambient temperature, the wind speed, etc. Different methods are required to calculate or measure the ice thickness in the distribution line by selecting different parameters.

[0054] In the embodiment of the present application, the conductor model parameters, insulator model parameters, related line installation parameters and environmental parameters during icing of the distribution line are selected as parameter information of the target distribution line to calculate the ice thickness;

[0055] In an optional embodiment, the target distribution lines are generally located in areas with severe climate or when the weather enters winter. This application cannot be used for distribution lines in other areas or for transmission lines that will not be covered with ice.

[0056] In an optional embodiment, the methods for obtaining the conductor model parameters, insulator model parameters, related line erection parameters, and environmental parameters during icing of the distribution line are different, and can be estimated by manual measurement, using sensors, or through historical data. For example, the conductor model parameters can be obtained by consulting the design documents of the distribution line, the insulator model parameters can be determined by on-site inspection or using specific identification technology, and environmental parameters such as temperature and wind speed can be obtained through data from a weather station or a meteorological sensor installed on site. This application does not limit the acquisition means.

[0057] It should be noted that obtaining the parameter information of the target distribution line can provide accurate basic data for subsequent calculations. The accuracy of these parameter information directly affects the accuracy of the final calculated ice thickness.

[0058] S102, acquiring first data of a line to be tested in a target power distribution line according to the parameter information, and calculating a first stress of a target node in the line to be tested according to the first data;

[0059] In an embodiment of the present application, obtaining first data of a line to be tested in a target power distribution line according to parameter information includes:

[0060] The lines to be tested are one or more lines connected to any insulator string in the target distribution line;

[0061] All insulator strings in the target distribution line are of equal height or non-equal height.

[0062] It should be noted that there are generally insulator strings on both sides of the distribution line. The present application is a method for calculating the ice thickness designed with consideration of the positional relationship between the insulator strings and the distribution line. The present application also takes into account the situation where the ice thickness of only one line needs to be calculated. Therefore, the line to be tested in the present application can be one or more lines connected to any insulator strings in the target distribution line; all insulator strings in the target distribution line can be of equal height or unequal height.

[0063] In an optional embodiment, regardless of whether the insulator strings are of equal or unequal heights, or the number of target distribution lines, the calculation model of the present application can be used for processing. The calculation model will calculate the stress distribution of the target node based on factors such as the height difference of the insulator strings and the tension of the line. Through the stress distribution, the actual impact of ice coating on the line can be further calculated, thereby obtaining more accurate ice coating thickness data.

[0064] In the embodiments of the present application, for ease of understanding, the present application uses common examples of non-equal heights and distribution lines on both sides of the insulator string (i.e., one on each side, and three insulator strings connected by two conductors are not of equal height) for illustration.

[0065] In an optional embodiment, when the installation points of the line insulator strings are not at the same height, the horizontal stress, vertical load ratio and vertical span of the line will change with the change of ice coverage, and this application also takes this into consideration. When the installation points of the line insulator strings are at the same height, the vertical span of the line is only related to the horizontal span of the two spans before and after the line, and does not change with whether the line is covered with ice or not.

[0066] In the embodiment of the present application, obtaining first data of the line to be tested in the target power distribution line according to the parameter information further includes:

[0067] According to the parameter information, the conductor length when the line to be tested is installed, the temperature expansion coefficient of the conductor, the ambient temperature when ice is applied, and the design temperature of the conductor are obtained;

[0068] The difference between the conductor during installation and the conductor during ice coating is obtained based on the conductor's temperature expansion coefficient, the ambient temperature during ice coating, and the conductor's design temperature;

[0069] According to the wire length and the wire difference when the line to be tested is installed, the first data of the line to be tested in the target distribution line is obtained.

[0070] In the embodiment of the present application, the first data of the line to be tested is the wire length of the target line when iced. According to the wire model parameters of the distribution line, the model parameters of the insulator, the relevant line installation parameters and the environmental parameters when iced, the wire length, the temperature expansion coefficient of the wire, the ambient temperature when iced and the design temperature of the wire are obtained when the line to be tested is installed. Then, according to the temperature expansion coefficient of the wire, the ambient temperature when iced and the design temperature of the wire, the difference between the wire when installed and the wire when iced is obtained, which can be specifically expressed as:

[0071] L t =L-Lα(T i -T0)

[0072] Among them, L t is the conductor length when covered with ice, L is the conductor length when erected, α is the temperature expansion coefficient of the conductor, T i is the ambient temperature when ice is applied, and T0 is the design temperature of the conductor.

[0073] It should be noted that Lα(T i -T0) is to obtain the difference between the conductor during installation and the conductor during ice-covering according to the temperature expansion coefficient of the conductor, the ambient temperature during ice-covering and the design temperature of the conductor;

[0074] In the embodiment of the present application, when the above formula is used to calculate the difference between the different distribution lines on both sides, it can be expressed as follows:

[0075] L 1t =L1-L1α(T i -T0)

[0076] L 2t =L2-L2α(T i -T0)

[0077] Among them, L 1t , L 2t is the conductor length when covered with ice, L1 and L2 are the conductor lengths when erected, α is the temperature expansion coefficient of the conductor, T i is the ambient temperature when ice is applied, and T0 is the design temperature of the conductor.

[0078] In an embodiment of the present application, calculating the first stress of the target node in the circuit to be tested according to the first data includes:

[0079] The target node is the lowest point in the line to be tested;

[0080] The first stress is solved through the horizontal span, the height difference angle, the conductor deadweight load ratio and the first data.

[0081] In an optional embodiment, any point in the line to be tested can be selected to calculate the target node according to the theoretical value, but in order to improve the accuracy and practicality of the calculation, the present application specifically selects the lowest point in the line to be tested as the target node. This is because ice coating usually causes the line to sag, and the stress state at the lowest point can best reflect the impact of ice coating on the line. Therefore, in order to ensure the accuracy of the method, the present application selects the lowest point in the line to be tested as the target node;

[0082] In an optional embodiment, the first stress at the lowest point of the distribution line can be solved in different ways. For example, a finite element analysis method can be used to simulate the actual physical conditions by establishing an accurate line model to calculate the stress distribution of the target node. In addition, empirical formulas or numerical analysis methods can be used to estimate stress values ​​through mathematical models based on known line parameters and environmental conditions. These methods can be used alone or in combination to improve the accuracy and reliability of the calculation results.

[0083] In the embodiment of the present application, when calculating the first stress of the target node, the solution is obtained through the horizontal span, the height difference angle, the conductor deadweight load and the first data, specifically:

[0084]

[0085] Among them, l is the horizontal span, β is the height difference angle, γ is the conductor deadweight load, and σ0 is the horizontal stress of the conductor at the lowest point.

[0086] In the embodiment of the present application, when the above formula is used to calculate the first stress of the distribution lines on both sides, it can be expressed as follows:

[0087]

[0088] Among them, l1 and l2 are horizontal spans, β1 and β2 are height difference angles, γ is the conductor deadweight load, σ 10 , σ 20 are the horizontal stresses of the conductors on both sides at the lowest points respectively.

[0089] It should be noted that obtaining the first data of the line to be tested in the target distribution line according to the parameter information and calculating the first stress of the target node in the line to be tested according to the first data can provide a more accurate and practical calculation method to evaluate the impact of icing on the distribution line. In this way, line failures caused by icing can be effectively predicted and prevented, thereby improving the stability and safety of the power system. In addition, the calculation method is not only applicable to specific line conditions, but also has a wide range of applicability, can adapt to changes in different environments and line configurations, and provides strong technical support for the maintenance and management of the power system.

[0090] S103, acquiring second data of a line to be tested in a target power distribution line according to the first stress;

[0091] In an embodiment of the present application, obtaining second data of a line to be tested in a target power distribution line according to the first stress includes:

[0092] When the insulator strings on both sides of the line to be tested in the target distribution line are of equal height, the second data of the line to be tested in the target distribution line does not change with whether the line is covered with ice or not;

[0093] When the insulator strings on both sides of the line to be tested in the target distribution line are not of equal height, the second data of the line to be tested in the target distribution line changes depending on whether the line is covered with ice.

[0094] It should be noted that the present application takes into account that the height difference of the insulator string installation point has an important impact on the calculation of the equivalent ice thickness of the line. When the heights of the insulator strings on both sides are inconsistent, the vertical span of the line will be affected by the ice and change. When the insulator strings are of the same height, since the vertical spans on both sides of the line remain unchanged, the impact of ice on the vertical span can be ignored. The method of the present application comprehensively considers the impact of the height difference of the insulator strings on the calculation results, thereby improving the accuracy of the calculation. In practical applications, the situation where the insulator strings are of the same height is relatively rare, so the method of the present application is universal.

[0095] In the embodiment of the present application, obtaining second data of the line to be tested in the target power distribution line according to the first stress also includes:

[0096] When the insulator strings on both sides of the line to be tested in the target distribution line are not of equal height, the second data of the line to be tested in the target distribution line is solved by the horizontal span, the height difference angle and the conductor deadweight load ratio.

[0097] In the embodiment of the present application, the horizontal span can be obtained by the first stress and some existing parameters such as the height difference angle and the conductor deadweight load ratio. The second data in the present application is the vertical span. The specific solution steps are as follows:

[0098]

[0099] Among them, l a , l b are the horizontal distances from the lowest point of the conductors on both sides to the middle tower, σ 10 , σ 20 are the horizontal stresses of the conductors on both sides at the lowest points respectively.

[0100] In an optional embodiment, when the insulator strings on both sides of the line to be tested are not of equal height, the calculation formula for the vertical span is:

[0101]

[0102] Among them, l sc is the vertical spacing of the conductor.

[0103] In an optional embodiment, when the insulator strings on both sides of the line to be tested are of equal height, the calculation formula for the vertical span is:

[0104]

[0105] Among them, l sc is the vertical spacing of the conductor.

[0106] It should be noted that obtaining the second data of the line to be tested in the target distribution line based on the first stress can more accurately reflect the impact of icing on the vertical span of the distribution line. By considering the height difference of the insulator string, the calculation method provided in the present application can adapt to different line configurations, ensuring the accuracy and practicality of the calculation results. In actual operation, by measuring the height difference of the insulator string, combined with parameters such as the first stress and the conductor deadweight load ratio, the change in the vertical span can be accurately calculated, thereby providing a scientific basis for the maintenance and fault prevention of the power system. In addition, the method of the present application is not limited to specific line conditions, but can also adapt to changes in various environments and line configurations, providing strong technical support for the stable operation of the power system.

[0107] S104: Obtain the equivalent ice thickness of the line based on the second data in combination with a preset quality acquisition strategy.

[0108] In the embodiment of the present application, according to the second data, combined with the preset quality acquisition strategy, the equivalent ice thickness of the line is obtained, including:

[0109] Establish a relationship model between the ice weight per unit length of the line and the measured value of the pressure sensor, the deadweight of the insulator string, the acceleration of gravity, and the deadweight per unit length of the conductor;

[0110] Obtain the measured value of the pressure sensor, the deadweight of the insulator string, the gravity acceleration, and the deadweight per unit length of the conductor;

[0111] The ice weight per unit length of the line is obtained based on the obtained measurement value of the pressure sensor, the deadweight of the insulator string, the gravity acceleration and the deadweight per unit length of the conductor;

[0112] The equivalent ice thickness of the line is obtained based on the ice weight per unit length of the line.

[0113] In an optional embodiment, the pressure sensor can be positioned below or above the insulator string, so that the icing condition below the insulator string can be monitored in real time, thereby providing accurate icing weight data. Through the established relationship model, the real-time measurement value of the pressure sensor can be converted into the icing weight value per unit length of the line. Then, the equivalent icing thickness of the line can be calculated by combining the deadweight of the insulator string, the acceleration of gravity, and the deadweight value per unit length of the conductor. This method not only improves the accuracy of the calculation, but also can timely reflect the changes in the icing condition, providing a real-time monitoring and early warning mechanism for the safe operation of the power system. In addition, the implementation of this strategy helps to reduce power outages caused by icing and improve the reliability and risk resistance of the power system.

[0114] In the embodiment of the present application, considering the influence of ice coating, the pressure sensor is arranged below the insulator string;

[0115] In the embodiment of the present application, the relationship model is expressed as:

[0116] F=G j +l sc (q0g+q ice )

[0117] Where, F is the measured value of the pressure sensor, G j is the weight of the insulator string, g is the acceleration of gravity, q0 is the weight of the conductor per unit length, q ice It is the ice weight per unit length of the line.

[0118] In the embodiment of the present application, the specific steps of obtaining the equivalent ice thickness of the line according to the ice weight per unit length of the line may be:

[0119]

[0120] Where b is the equivalent ice thickness of the line, D is the conductor diameter, and ρ is the ice density, which is taken as 900 kg / m 3 .

[0121] In summary, the present invention proposes a method for calculating the equivalent ice thickness of a distribution line, obtaining parameter information of a target distribution line; obtaining first data of a line to be tested in the target distribution line according to the parameter information, and calculating the first stress of a target node in the line to be tested according to the first data; obtaining second data of a line to be tested in the target distribution line according to the first stress; and obtaining the equivalent ice thickness of the line according to the second data in combination with a preset quality acquisition strategy. The method and system for calculating the equivalent ice thickness of a distribution line of the present application can effectively improve the calculation accuracy of the ice thickness and reduce power failures caused by ice. By accurately calculating the equivalent ice thickness of the line, timely warnings and measures can be taken to avoid line breakage and power outages caused by excessive ice. The calculation method and system of the present application have the characteristics of simple operation and fast calculation, are applicable to distribution lines in various environments, and improve the stability and reliability of the power system. The implementation of the present application can not only improve the operating efficiency of the power system, but also provide a scientific basis for the maintenance and management of the power system, with significant economic and social benefits.

[0122] This embodiment also provides a distribution line equivalent ice thickness calculation system, including:

[0123] A data acquisition module, used to obtain parameter information of a target distribution line;

[0124] A first calculation module, used for acquiring first data of a line to be tested in a target power distribution line according to the parameter information, and calculating a first stress of a target node in the line to be tested according to the first data;

[0125] A second calculation module, used for acquiring second data of a line to be tested in a target power distribution line according to the first stress;

[0126] The third calculation module is used to obtain the equivalent ice thickness of the line according to the second data in combination with a preset quality acquisition strategy.

[0127] The above-mentioned unit modules may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to the above-mentioned modules.

[0128] This embodiment also provides a computer device, which may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 3As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for calculating the equivalent ice thickness of a distribution line is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a button, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse.

[0129] This embodiment further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0130] Obtain parameter information of the target distribution line;

[0131] Acquire first data of a line to be tested in a target power distribution line according to the parameter information, and calculate a first stress of a target node in the line to be tested according to the first data;

[0132] Acquire second data of a line to be tested in a target power distribution line according to the first stress;

[0133] According to the second data and in combination with the preset quality acquisition strategy, the equivalent ice thickness of the line is obtained.

[0134] Example 2

[0135] Reference Figure 1-Figure 2 , which is an embodiment of the present invention, provides a method and system for calculating the equivalent ice thickness of a distribution line. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through experiments.

[0136] like Figure 2As shown, a calculation model diagram of a method for calculating equivalent ice thickness of distribution lines based on pressure sensors is invented. The figure is a simplified calculation model diagram of the conductors and insulator strings of the front and rear distribution lines when ice is applied. In the figure, the pressure sensor is installed below the insulator string of the middle tower, and the pressure direction is vertically downward; the horizontal spans on both sides of the line are l1 and l2, the height differences are h1 and h2, and the height difference angles are β1 and β2; since the installation points of the insulator strings of the line are not at the same height at this time, the horizontal stress, vertical load ratio and vertical span of the line will change with the change of ice conditions, and the present invention also takes this into consideration. When the installation points of the insulator strings of the line are at the same height, the vertical span of the line is:

[0137]

[0138] It is only related to the horizontal span between the front and rear gears of the line and does not change with whether the line is covered with ice or not.

[0139] When implementing the method of this application, first obtain the conductor model parameters of the distribution line, the model parameters of the insulator, the relevant line installation parameters, and the environmental parameters when iced. When the line is iced, calculate the length of the conductor in the gear under iced conditions based on the ambient temperature parameters at the time, and then solve the horizontal stress of the conductor at the lowest point based on the inclined parabola equation of the conductor and the basic parameters such as the height difference and specific load of the line. Then, based on the horizontal stress at the lowest point of the conductors on both sides calculated previously, calculate the horizontal distance from the lowest point of the conductors on both sides to the middle tower, and then obtain the vertical span of the line:

[0140]

[0141] Finally, the ice weight per unit length is calculated by reading the measured value of the pressure sensor under the insulator string when ice is applied. The measured value of the pressure sensor under the insulator string is the sum of the deadweight of the conductor, the deadweight of the insulator string, and the weight of ice. ice =0.9gπ(D+b)b×10 -3 Obtain the equivalent ice thickness b of the line.

[0142] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0143] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0144] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0145] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0146] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0147] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0148] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for calculating equivalent ice thickness of distribution lines, characterized in that: include: Obtain parameter information of the target distribution line; Acquire first data of a line to be tested in a target power distribution line according to the parameter information, and calculate a first stress of a target node in the line to be tested according to the first data; Acquire second data of a line to be tested in a target power distribution line according to the first stress; According to the second data and in combination with a preset quality acquisition strategy, the equivalent ice thickness of the line is obtained.

2. The method for calculating equivalent ice thickness of distribution lines according to claim 1, characterized in that: The acquiring first data of a line to be tested in a target power distribution line according to the parameter information comprises: The line to be tested is one or more lines connected to any insulator string in the target distribution line; All insulator strings in the target distribution line are of equal height or unequal height.

3. The method for calculating equivalent ice thickness of distribution lines according to claim 2, characterized in that: The step of acquiring second data of a line to be tested in a target power distribution line according to the first stress comprises: When the insulator strings on both sides of the line to be tested in the target distribution line are of equal height, the second data of the line to be tested in the target distribution line does not change with whether the line is covered with ice or not; When the insulator strings on both sides of the line to be tested in the target distribution line are not of equal height, the second data of the line to be tested in the target distribution line changes depending on whether the line is covered with ice.

4. The method for calculating equivalent ice thickness of distribution lines according to claim 3, characterized in that: The step of acquiring first data of a line to be tested in a target power distribution line according to the parameter information further comprises: According to the parameter information, the conductor length when the line to be tested is installed, the temperature expansion coefficient of the conductor, the ambient temperature when ice is applied, and the design temperature of the conductor are obtained; According to the temperature expansion coefficient of the conductor, the ambient temperature when ice is applied, and the design temperature of the conductor, the difference between the conductor when erected and the conductor when ice is applied is obtained; According to the wire length and the wire difference when the line to be tested is installed, first data of the line to be tested in the target power distribution line is obtained.

5. The method for calculating equivalent ice thickness of distribution lines according to claim 4, characterized in that: Calculating the first stress of the target node in the circuit to be tested according to the first data includes: The target node is the lowest point in the line to be tested; The first stress is solved by means of the horizontal span, the height difference angle, the conductor deadweight load ratio and the first data.

6. The method for calculating equivalent ice thickness of distribution lines according to claim 5, characterized in that: The step of obtaining second data of a line to be tested in a target power distribution line according to the first stress further includes: When the insulator strings on both sides of the line to be tested in the target distribution line are not of equal height, the second data of the line to be tested in the target distribution line is solved by means of the horizontal span, the height difference angle and the conductor deadweight load ratio.

7. The method for calculating equivalent ice thickness of distribution lines according to claim 6, characterized in that: The obtaining of the line equivalent ice thickness according to the second data and in combination with a preset quality acquisition strategy includes: Establish a relationship model between the ice weight per unit length of the line and the measured value of the pressure sensor, the deadweight of the insulator string, the acceleration of gravity, and the deadweight per unit length of the conductor; Obtain the measured value of the pressure sensor, the deadweight of the insulator string, the gravity acceleration, and the deadweight per unit length of the conductor; The ice weight per unit length of the line is obtained based on the obtained measurement value of the pressure sensor, the deadweight of the insulator string, the gravity acceleration and the deadweight per unit length of the conductor; The equivalent ice thickness of the line is obtained according to the ice weight per unit length of the line.

8. A distribution line equivalent ice thickness calculation system, characterized in that: include: A data acquisition module, used to obtain parameter information of a target distribution line; A first calculation module, configured to obtain first data of a line to be tested in a target power distribution line according to the parameter information, and calculate a first stress of a target node in the line to be tested according to the first data; A second calculation module, used for acquiring second data of a line to be tested in a target power distribution line according to the first stress; The third calculation module is used to obtain the equivalent ice thickness of the line according to the second data in combination with a preset quality acquisition strategy.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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