Method and system for determining standard ice thickness of conductor icing based on monitoring data of OPGW optical cable

Abstract

The present application belongs to the field of overhead transmission line operation and maintenance, and discloses a method and system for determining conductor icing standard ice thickness based on OPGW optical cable monitoring data, which comprises the following steps: obtaining optical fiber strain data of optical fiber composite overhead ground wire (OPGW) optical cable after icing, and obtaining OPGW optical cable standard ice thickness according to strain-stress relationship; collecting working parameters of OPGW optical cable and conductor, and respectively calculating off-ground height correction coefficient, conductor diameter correction coefficient, ampacity correction coefficient and torsional stiffness correction coefficient; combining OPGW optical cable standard ice thickness and off-ground height correction coefficient, conductor diameter correction coefficient, ampacity correction coefficient and torsional stiffness correction coefficient to obtain conductor icing standard ice thickness. By introducing multi-factor correction coefficients, the calculation accuracy of conductor icing standard ice thickness is improved; at the same time, the adaptability and application range of the method are enhanced; accurate basis is provided for operation and maintenance of transmission lines; and technological innovation and development are promoted.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of overhead transmission line operation and maintenance, and particularly relates to a conductor icing standard ice thickness determination method and system based on OPGW optical cable monitoring data. BACKGROUND

[0002] As an important part of the power system, transmission lines inevitably face the severe challenge of icing disasters. When the temperature and humidity conditions are suitable, ice layers will rapidly accumulate on the surface of transmission lines, not only increasing the weight of the lines, but also possibly causing short circuits between conductors and a sharp increase in mechanical stress. In severe cases, icing can lead to a series of serious faults such as tower collapse, line breakage, and insulator string falling, which greatly threatens the safe and stable operation of the power grid and poses a significant risk to the power supply safety of important users.

[0003] Therefore, accurately monitoring and assessing the icing conditions of transmission lines is crucial for ensuring the safe operation of the power grid. Icing monitoring data such as standard ice thickness, as a key indicator reflecting the degree of line icing, has indispensable reference value and important guiding significance for the planning layout, design selection, construction, daily operation and maintenance, and necessary upgrading of transmission lines. They can help power departments to timely understand the actual icing conditions of the lines, predict potential risks, and thus take preventive measures to reduce the harm caused by icing.

[0004] Currently, in order to effectively monitor the icing conditions of transmission lines, many in-service overhead transmission lines have widely deployed optical fiber composite overhead ground wires (OPGW) optical cables. Optical fiber composite overhead ground wires (OPGW) not only serve as an advanced lightning protection measure, effectively guiding lightning current into the ground to protect the line from lightning damage, but also ingeniously integrate optical fiber sensing technology, which can be used as an icing monitoring sensor. Through the optical fiber sensors installed along the line at each tower, real-time icing data at each point is collected and transmitted to the background monitoring system, realizing remote, real-time, and high-precision monitoring of the icing state of the transmission line.

[0005] However, although OPGW optical cables have shown great potential in icing monitoring, due to the significant differences in physical characteristics between conductors and OPGW, such as different heights from the ground, different conductor diameters, different load capacities, and different torsional stiffness, these factors result in that the optical fiber monitoring standard ice thickness data obtained directly from OPGW cannot be directly equivalent to the actual standard ice thickness of the conductor. This detection difference brings difficulties to the operation and maintenance management and repair decision-making of transmission lines, leading to low efficiency of maintenance and operation. SUMMARY

[0006] The purpose of the present invention is to provide a method and system for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data, so as to solve the problem of low efficiency of transmission line maintenance and repair caused by differences in monitoring data.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data, comprising:

[0009] Obtain optical fiber strain data of optical fiber composite overhead ground wire (OPGW) cables after ice coating, and obtain the standard ice thickness of OPGW cables based on the strain-stress relationship;

[0010] Collect the operating parameters of OPGW optical cables and conductors, and calculate the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor, and torsional stiffness correction factor respectively;

[0011] The standard ice thickness of the conductor ice is obtained by combining the standard ice thickness of the OPGW optical cable with the correction factor of the height above the ground, the correction factor of the conductor diameter, the correction factor of the current carrying capacity, and the correction factor of the torsional stiffness.

[0012] Furthermore, the step of obtaining optical fiber strain data of the OPGW optical cable after ice coating and obtaining the standard ice thickness of the OPGW optical cable according to the strain-stress relationship includes:

[0013] The strain change data of the optical fiber is collected by the optical fiber sensor. Combined with the optical fiber material parameters, optical cable structure parameters and ice layer density, the standard ice thickness of the OPGW optical cable is calculated through the strain-stress relationship.

[0014] Furthermore, the calculation of the ground clearance correction coefficient includes:

[0015] Collect the ground clearance of the conductor and the OPGW at the three locations of the large, medium, and small side hanging points of each conductor, and calculate the ground clearance correction factor based on the following parameters:

[0016]

[0017] In the formula For the Correction coefficient of height of transmission line above ground, is the ground clearance correction factor at the large side mounting point, is the ground clearance correction coefficient at the center of the gear spacing, The ground clearance correction factor for the small side mounting point;

[0018] 、 、 We can get it by the following formula:

[0019]

[0020]

[0021]

[0022] In the formula, , , , , , respectively represent the wire height at the large side hanging point, the OPGW height at the large side hanging point, the central wire height of the span, the central OPGW height of the span, the wire height at the small side hanging point, and the OPGW height at the small side hanging point, The value rules are as follows:

[0023]

[0024] In the formula is the height above ground, unit m, corresponding to , , , , , 6 parameters.

[0025] Further, the wire diameter correction coefficient includes:

[0026] The diameters of the wire and the OPGW when not covered with ice are collected and represented as and respectively; the wire diameter correction coefficient The calculation method is as follows:

[0027]

[0028] In the formula, and respectively represent the wire diameter and the OPGW diameter after icing at the minute, is the wire diameter correction coefficient at the minute, The value is , is the number of minutes during which the icing process lasts; through time change iteration, the wire diameter correction coefficient is rolling corrected.

[0029] Further, the calculation of the ampacity correction coefficient includes:

[0030] The current meter that collects the ice thickness, temperature, and wind speed of the conductor under the set working conditions so that the ice coverage of the conductor remains balanced is , No. Minute current factor The calculation is as follows:

[0031] .

[0032] Furthermore, the calculation of the torsional stiffness correction coefficient includes:

[0033]

[0034] is the torsional stiffness correction factor.

[0035] Furthermore, the standard ice thickness of the conductor ice is obtained by combining the standard ice thickness of the OPGW optical cable and the ground height correction factor, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor, including:

[0036]

[0037] Where, is the standard ice thickness of the conductor, mm; is the altitude correction factor; is the wire diameter correction factor; is the ampacity correction factor; is the torsional stiffness correction factor; It is the standard ice thickness of OPGW optical cable, mm.

[0038] In a second aspect, the present invention provides a system for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data, comprising:

[0039] OPGW optical cable standard ice thickness acquisition module, used to obtain optical fiber strain data of OPGW optical cable after ice coating, and obtain the standard ice thickness of OPGW optical cable based on the strain-stress relationship;

[0040] The correction coefficient acquisition module is used to collect the operating parameters of the OPGW optical cable and conductor, and calculate the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor and torsional stiffness correction factor respectively;

[0041] The calculation output module is used to combine the standard ice thickness of the OPGW optical cable with the ground height correction factor, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor to obtain the standard ice thickness of the conductor ice.

[0042] Furthermore, the correction coefficient acquisition module is used to collect the operating parameters of the OPGW optical cable and conductor, and calculate the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor and torsional stiffness correction factor respectively, including:

[0043] The calculation of the ground clearance correction coefficient includes:

[0044] Collect the ground clearance of the conductor and the OPGW at the three locations of the large, medium, and small side hanging points of each conductor, and calculate the ground clearance correction factor based on the following parameters:

[0045]

[0046] In the formula For the Correction coefficient of height of transmission line above ground, is the ground clearance correction factor at the large side mounting point, is the ground clearance correction coefficient at the center of the gear spacing, The ground clearance correction factor for the small side mounting point;

[0047] 、 、 We can get it by the following formula:

[0048]

[0049]

[0050]

[0051] Where, 、 、 、 、 、 They represent the height of the conductor from the ground at the large side hanging point, the height of the OPGW from the ground at the large side hanging point, the height of the conductor from the ground at the center of the span, the height of the OPGW from the ground at the center of the span, the height of the conductor from the ground at the small side hanging point, and the height of the OPGW from the ground at the small side hanging point. The value selection rules are as follows:

[0052]

[0053] In the formula is the height from the ground, in m, corresponding to 、 、 、 、 、 6 parameters;

[0054] The wire diameter correction factor includes:

[0055] The diameters of the collection conductor and OPGW optical cable when not covered with ice are expressed as and ;Wire diameter correction factor The calculation method is as follows:

[0056]

[0057] Where, and Representing the At 1 minute, the diameter of the conductor and OPGW after ice coating, For the Minute wire diameter correction factor, The value is , The number of minutes that the icing process lasts; the wire diameter correction factor is rolled and corrected through time-varying iterations ;

[0058] The calculation of the ampacity correction coefficient includes:

[0059] The current meter that collects the ice thickness, temperature, and wind speed of the conductor under the set working conditions so that the ice coverage of the conductor remains balanced is , No. Minute current factor The calculation is as follows:

[0060] ;

[0061] The calculation of the torsional stiffness correction coefficient includes:

[0062]

[0063] is the torsional stiffness correction factor;

[0064] The method combines the standard ice thickness of the OPGW optical cable with the ground height correction factor, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor to obtain the standard ice thickness of the conductor ice, including:

[0065]

[0066] Where, is the standard ice thickness of the conductor, mm; is the altitude correction factor; is the wire diameter correction factor; is the ampacity correction factor; is the torsional stiffness correction factor; is the standard ice thickness of OPGW optical cable, mm.

[0067] In a third aspect, the present application provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for determining the standard ice thickness of conductor icing based on the monitoring data of OPGW optical cable when executing the computer program.

[0068] In a fourth aspect, the present application provides a computer readable storage medium, which stores a computer program, wherein the computer program implements the steps of the method for determining the standard ice thickness of conductor icing based on the monitoring data of OPGW optical cable when executed by a processor.

[0069] Compared with the prior art, the present application has the following technical effects:

[0070] The present application proposes a method for calculating the standard ice thickness of conductor icing based on the monitoring data of OPGW (optical fiber composite overhead ground wire), aiming to solve the problem of inaccurate ice thickness monitoring caused by the difference in physical properties between the conductor and the OPGW, resulting in low efficiency of maintenance and operation of the power transmission line. Through the introduction and calculation of the correction coefficient, this method can more accurately reflect the actual icing condition of the conductor, providing a scientific basis for the anti-icing work of the power transmission line, and significantly improving the efficiency and effect of maintenance and operation.

[0071] The present application collects strain data of OPGW optical cable through a fiber optic sensor, and combines fiber material parameters, optical cable structure parameters and ice layer density to calculate the standard ice thickness of OPGW optical cable by using the strain-stress relationship. This step provides basic data for subsequent correction, ensuring the preliminary accuracy of monitoring.

[0072] The present application considers multiple influencing factors such as the height above ground, the conductor diameter, the current carrying capacity and the torsional stiffness, and calculates the corresponding correction coefficients respectively. The introduction of these correction coefficients makes the final standard ice thickness of conductor icing more close to the actual situation, improving the accuracy of monitoring.

[0073] The present application calculates the height above ground correction coefficient by collecting the height above ground of each section of conductor at different positions and the height above ground of OPGW. This correction takes into account the influence of terrain undulation and line layout on ice thickness, enhancing the adaptability of the method to different terrain and line conditions.

[0074] The present application iteratively calculates the conductor diameter correction coefficient and the current carrying capacity correction coefficient, dynamically reflecting the influence of these changes on ice thickness, improving the adaptability of the method.

[0075] The present invention provides different torsional stiffness correction coefficients for conductors with different numbers of splits. This correction takes into account the effect of the number of conductor splits on ice thickness, making the method applicable to different types of transmission lines.

[0076] The standard ice thickness of conductor ice coating obtained through this method is more accurate and reliable, providing a scientific basis for the operation, maintenance and inspection of power transmission lines. Based on this data, operators can promptly assess the ice coverage of the line and formulate effective countermeasures to reduce faults and power outages caused by ice.

[0077] Because this method monitors conductor ice coverage in real time, it can provide early warnings before ice accumulation reaches dangerous levels, buying valuable repair time for maintenance personnel and reducing the probability and scope of failures. Accurate ice data can also help power companies optimize resource allocation, rationally arrange maintenance personnel and material reserves, and improve overall operational efficiency and economic benefits.

[0078] In summary, this technical solution improves the accuracy of calculating the standard ice thickness of conductor ice by introducing a multi-factor correction factor. It also enhances the method's adaptability and scope of application, provides an accurate basis for transmission line operation, maintenance, and inspection, and promotes technological innovation and development. Therefore, this technical solution has significant practical value and promotional significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0080] The present invention is further described below with reference to the accompanying drawings:

[0081] Example 1, please refer to Figure 1 The present invention provides a method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data, comprising:

[0082] Obtain optical fiber strain data of OPGW optical cables after ice coating, and obtain the standard ice thickness of OPGW optical cables based on the strain-stress relationship;

[0083] Collect the operating parameters of OPGW optical cables and conductors, and calculate the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor, and torsional stiffness correction factor respectively;

[0084] The standard ice thickness of the conductor ice is obtained by combining the standard ice thickness of the OPGW optical cable with the correction factor of the height above the ground, the correction factor of the conductor diameter, the correction factor of the current carrying capacity, and the correction factor of the torsional stiffness.

[0085] The present invention first uses optical fiber sensors to directly obtain strain data from ice-covered OPGW cables and uses the strain-stress relationship to infer the standard ice thickness of the OPGW cables. This step provides a preliminary estimate of ice thickness, which serves as a basis for subsequent corrections.

[0086] The method then takes into account several key factors affecting ice thickness, including height above the ground, conductor diameter, current carrying capacity, and torsional stiffness, and calculates corresponding correction coefficients. The inclusion of these correction coefficients significantly improves the accuracy and reliability of the monitoring results, making the resulting standard ice thickness for conductors more realistic.

[0087] The calculation of the height correction factor in this invention takes into account the impact of terrain undulations and climate differences on ice thickness, making the method applicable to transmission line monitoring in diverse terrain and climate conditions. The calculation of the conductor diameter correction factor and the torsional stiffness correction factor fully considers the conductor's physical properties, such as diameter variation and number of splits, enhancing the method's adaptability to different conductor types. The introduction of the ampacity correction factor accounts for the impact of ampacity variations on ice formation and melting, making monitoring results more dynamic and accurate.

[0088] The accurate ice thickness data of the present invention provides timely warning and decision support for operation and maintenance personnel, helping to take preventive measures before ice coverage reaches a dangerous level and reduce the risk of faults and power outages.

[0089] Based on the monitoring results, operation and maintenance personnel can allocate resources and arrange emergency repair plans more reasonably, thereby improving operation and maintenance efficiency and response speed.

[0090] In summary, the method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data, provided by this invention, significantly improves the accuracy and reliability of monitoring results through sophisticated calculation and correction steps; enhances the method's adaptability to complex environments; improves operational efficiency and safety; and promotes technological innovation and standardization. This method has significant practical value and application prospects, providing a strong guarantee for the safe and stable operation of the power industry.

[0091] In Example 2, the present invention provides a method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data, specifically comprising:

[0092] First, the standard ice thickness of OPGW conductors is calculated based on the correlation between ice thickness and optical fiber strain. Then, correction factors for ground clearance, conductor diameter, ampacity, and torsional stiffness are calculated based on the specific parameters of the ground conductors in the ice barrier. By applying these correction factors, the standard ice thickness of the conductors is calculated. This method, which accounts for differences between ground conductors, can effectively improve the accuracy of standard ice thickness measurements for transmission line conductors.

[0093] The calculation formula for the standard ice thickness of the conductor is as follows:

[0094]

[0095] Where, is the standard ice thickness of the conductor, mm; is the altitude correction factor; is the wire diameter correction factor; is the ampacity correction factor; is the stiffness correction factor; It is the standard ice thickness of OPGW optical cable, mm.

[0096] Calculation method of ground clearance correction factor.

[0097] For the i-th level conductor, the calculation method of the ground height correction coefficient is as follows:

[0098] Collect the conductor ground clearance data and OPGW ground clearance data at the large side hanging point, middle point, and small side hanging point of each conductor, and calculate the ground clearance correction coefficient based on the following parameters.

[0099]

[0100] In the formula For the Correction coefficient of height of transmission line above ground, is the ground clearance correction factor at the large side mounting point, is the ground clearance correction coefficient at the center of the gear spacing, It is the correction factor for the height above the ground at the small side mounting point.

[0101] Assume that the height of the opgw hanging point from the large side hanging point is , the height of the conductor large side hanging point from the ground is

[0102]

[0103]

[0104]

[0105] Where, 、 、 、 、 、 They represent the height of the conductor from the ground at the large side hanging point, the height of the OPGW from the ground at the large side hanging point, the height of the conductor from the ground at the center of the span, the height of the OPGW from the ground at the center of the span, the height of the conductor from the ground at the small side hanging point, and the height of the OPGW from the ground at the small side hanging point. The value selection rules are as follows:

[0106]

[0107] In the formula is the height from the ground, in m, corresponding to 、 、 、 、 、 6 parameters.

[0108] Calculation method of wire diameter correction factor.

[0109] The diameters of the conductor and OPGW when not covered with ice are and Assuming that the icing process continues minute. The calculation method is as follows:

[0110]

[0111] Where, and Representing the At 1 minute, the diameter of the conductor and OPGW after ice coating, For the Minute wire diameter correction factor, The value is Through time-varying iteration, rolling correction of wire diameter correction coefficient .

[0112] Ampacity correction factor.

[0113] The current meter that keeps the ice amount balanced under the working conditions of LGJ-400 / 35 conductor with ice thickness of 10mm, temperature of -5℃ and wind speed of 10m / s is . No. Minute current factor The calculation is as follows:

[0114]

[0115] Calculated based on the real-time current carrying capacity of the conductor , and substitute into the following formula: Calculate the thickness of ice covering the conductor.

[0116] Torsional stiffness correction factor

[0117] The calculation method of the conductor torsional stiffness correction factor is as follows:

[0118] .

[0119] During the design and implementation of this method, multiple differences between conductors and OPGWs (Optical Fiber Composite Overhead Ground Wires) were carefully considered. These differences include, but are not limited to, their respective heights above the ground, whether they are energized, conductor diameter, and the number of conductor splits. These factors significantly affect conductor ice thickness, necessitating careful corrections to obtain accurate ice thickness data.

[0120] First, the method collects the ground height of the conductor and OPGW at different locations and calculates a ground height correction factor to eliminate the effects of terrain undulation and line layout on ice thickness measurements. This step ensures relatively accurate ice thickness data regardless of the conductor's height.

[0121] Secondly, considering that changes in conductor diameter directly affect the accumulation and distribution of ice, the method introduces a conductor diameter correction factor. By monitoring the diameter changes of the conductor and OPGW in real time and adjusting the correction factor accordingly, the impact of ice on the actual conductor diameter can be more accurately reflected.

[0122] Furthermore, ampacity, as an important parameter for conductor operation, also affects the formation and melting of ice. This method considers the effect of heat generated by current on ice thickness by calculating the ampacity correction coefficient, thereby improving the accuracy of monitoring results.

[0123] Furthermore, different types of conductors, such as single conductors and split conductors, have different torsional stiffnesses, which can affect the thickness and distribution of ice. Therefore, the method also introduces a torsional stiffness correction factor to adapt to the ice monitoring needs of different conductor types.

[0124] After these modifications, this method can now produce a more objective standard ice thickness for conductor ice coverage. This data not only provides an accurate basis for conductor anti-icing efforts, enabling operators to promptly identify and address potential icing hazards, but also significantly improves the quality and efficiency of transmission line maintenance and inspection. By reducing power outages caused by icing and optimizing the allocation of maintenance resources, this method has made a significant contribution to the safe and stable operation of the power industry.

[0125] In yet another embodiment of the present invention, a system for determining the standard ice thickness of conductor ice coating based on OPGW optical cable monitoring data is provided, which can be used to implement the above-mentioned method for determining the standard ice thickness of conductor ice coating based on OPGW optical cable monitoring data. Specifically, the system includes:

[0126] OPGW optical cable standard ice thickness acquisition module, used to obtain optical fiber strain data of OPGW optical cable after ice coating, and obtain the standard ice thickness of OPGW optical cable based on the strain-stress relationship;

[0127] The correction coefficient acquisition module is used to collect the operating parameters of the OPGW optical cable and conductor, and calculate the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor and torsional stiffness correction factor respectively;

[0128] The calculation output module is used to combine the standard ice thickness of the OPGW optical cable with the ground height correction factor, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor to obtain the standard ice thickness of the conductor ice.

[0129] The module division in the embodiments of the present invention is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in various embodiments of the present invention may be integrated into a single processor, exist physically as separate modules, or two or more modules may be integrated into a single module. The integrated modules may be implemented in either hardware or software functional modules.

[0130] In another embodiment of the present invention, a computer device is provided, comprising a processor and a memory, wherein the memory is configured to store a computer program, the computer program including program instructions, and the processor is configured to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal and is suitable for implementing one or more instructions, specifically loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function. The processor described in this embodiment of the present invention can be used to operate a method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data.

[0131] In another embodiment of the present invention, a storage medium is provided, specifically a computer-readable storage medium (Memory). The computer-readable storage medium is a memory device in a computer device, used to store programs and data. It is understood that the computer-readable storage medium herein may include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides storage space, which stores the terminal's operating system. Furthermore, the storage space stores one or more instructions suitable for being loaded and executed by a processor. These instructions may be one or more computer programs (including program code). It should be noted that the computer-readable storage medium herein may be a high-speed RAM memory or a non-volatile memory, such as at least one disk drive. The processor may load and execute the one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data in the above-mentioned embodiment.

[0132] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0133] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, 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 produce 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 flowcharts and / or block diagrams. 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.

[0134] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0135] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device 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.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data, characterized in that: include: Obtain optical fiber strain data of optical fiber composite overhead ground wire (OPGW) cables after ice coating, and obtain the standard ice thickness of OPGW cables based on the strain-stress relationship; Collect the operating parameters of OPGW optical cables and conductors, and calculate the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor, and torsional stiffness correction factor respectively; The standard ice thickness of the conductor ice is obtained by combining the standard ice thickness of the OPGW optical cable with the correction factor of the height above the ground, the correction factor of the conductor diameter, the correction factor of the current carrying capacity, and the correction factor of the torsional stiffness. The calculation of the ampacity correction coefficient includes: Collect the conductor ice thickness, temperature, and wind speed under the set working conditions. The current meter that keeps the conductor ice coverage balanced is I0, and the current carrying capacity correction coefficient k in the i-th minute is Ii The calculation is as follows: Among them, I i is the current at minute i; The calculation of the torsional stiffness correction coefficient includes: k s is the torsional stiffness correction factor; The method combines the standard ice thickness of the OPGW optical cable with the ground height correction factor, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor to obtain the standard ice thickness of the conductor ice, including: T c =k h k d k I k s T o Where, T c is the standard ice thickness of the conductor, mm; k h is the altitude correction factor; k d is the wire diameter correction factor; k I is the current carrying capacity correction factor; k s is the torsional stiffness correction factor; T o It is the standard ice thickness of OPGW optical cable, mm.

2. The method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data according to claim 1, characterized in that: The method of obtaining optical fiber strain data of the OPGW optical cable after ice coating and obtaining the standard ice thickness of the OPGW optical cable according to the strain-stress relationship includes: The strain change data of the optical fiber is collected by the optical fiber sensor. Combined with the optical fiber material parameters, optical cable structure parameters and ice layer density, the standard ice thickness of the OPGW optical cable is calculated through the strain-stress relationship.

3. The method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data according to claim 1, characterized in that: The calculation of the ground clearance correction coefficient includes: Collect the ground clearance of the conductor and the OPGW at the three locations of the large, medium, and small side hanging points of each conductor, and calculate the ground clearance correction factor based on the following parameters: K hi =(k hh +k hm +k hl ) / 3 Where k hi k is the correction coefficient for the height of the i-th transmission line above the ground, hh is the ground clearance correction factor at the large side mounting point, k hm k is the ground clearance correction coefficient at the center of the gear spacing, hl The ground clearance correction factor for the small side mounting point; k hh 、k hm 、k hl It is obtained by the following formula: Where Z hhc , Z hho , Z hmc , Z hmo , Z hlc , Z hlo They represent the ground clearance of the conductor at the large side hanging point, the ground clearance of the OPGW at the large side hanging point, the ground clearance of the conductor at the center of the span, the ground clearance of the OPGW at the center of the span, the ground clearance of the conductor at the small side hanging point, and the ground clearance of the OPGW at the small side hanging point. The value of a is as follows: Where Z is the height from the ground, in meters, corresponding to Z hhc , Z hho , Z hmc , Z hmo , Z hlc , Z hlo 6 parameters.

4. The method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data according to claim 1, characterized in that: The wire diameter correction factor includes: The diameters of the collection conductor and OPGW optical cable when not covered with ice are denoted as R c0 and R o0 ; Wire diameter correction factor k d The calculation method is as follows: k di =R c(i-1) / R 。(i-1) Where R c(i-1) and R o(i-1) Respectively represent the diameters of the conductor and OPGW after ice coating at minute i-1, k di is the conductor diameter correction coefficient at the i-th minute, i is 0-M, M is the number of minutes the icing process lasts; through time-varying iteration, the conductor diameter correction coefficient k is rolled and corrected. d .

5. The system for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data is characterized by: include: OPGW optical cable standard ice thickness acquisition module, used to obtain optical fiber strain data of OPGW optical cable after ice coating, and obtain the standard ice thickness of OPGW optical cable based on the strain-stress relationship; The correction coefficient acquisition module is used to collect the operating parameters of the OPGW optical cable and conductor, and calculate the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor and torsional stiffness correction factor respectively; The calculation output module is used to combine the standard ice thickness of the OPGW optical cable with the ground height correction factor, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor to obtain the standard ice thickness of the conductor; The calculation of the ampacity correction coefficient includes: Collect the conductor ice thickness, temperature, and wind speed under the set working conditions. The current meter that keeps the conductor ice coverage balanced is I0, and the current carrying coefficient k in the i-th minute is Ii The calculation is as follows: Among them, I i is the current at minute i; The calculation of the torsional stiffness correction coefficient includes: k s is the torsional stiffness correction factor; The method combines the standard ice thickness of the OPGW optical cable with the ground height correction factor, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor to obtain the standard ice thickness of the conductor ice, including: T c =k h k d k I k s T o Where, T c is the standard ice thickness of the conductor, mm; k h is the altitude correction factor; k d is the wire diameter correction factor; k I is the current carrying capacity correction factor; k s is the torsional stiffness correction factor; T o It is the standard ice thickness of OPGW optical cable, mm.

6. The system for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data according to claim 5, characterized in that: The correction coefficient acquisition module is used to collect the operating parameters of the OPGW optical cable and conductors, and calculate the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor, and torsional stiffness correction factor, including: The calculation of the ground clearance correction coefficient includes: Collect the ground clearance of the conductor and the OPGW at the three locations of the large, medium, and small side hanging points of each conductor, and calculate the ground clearance correction factor based on the following parameters: k hi =(k hh +k hm +k hl ) / 3 Where k hi k is the correction coefficient for the height of the i-th transmission line above the ground, hh is the ground clearance correction factor at the large side mounting point, k hm k is the ground clearance correction coefficient at the center of the gear spacing, hl The ground clearance correction factor for the small side mounting point; k hh 、k hm 、k hl It is obtained by the following formula: Where Z hhc , Z hho , Z hm , Z hm , Z hl , Z hlo They represent the ground clearance of the conductor at the large side hanging point, the ground clearance of the OPGW at the large side hanging point, the ground clearance of the conductor at the center of the span, the ground clearance of the OPGW at the center of the span, the ground clearance of the conductor at the small side hanging point, and the ground clearance of the OPGW at the small side hanging point. The value of a is as follows: Where Z is the height from the ground, in meters, corresponding to Z hh , Z hho , Z hmc , Z hmo , Z hlc , Z hl 6 parameters; The wire diameter correction factor includes: The diameters of the collection conductor and OPGW optical cable when not covered with ice are denoted as R c0 and R o0 ; Wire diameter correction factor k d The calculation method is as follows: k di =R c(i-1) / R 。(i-1) Where R c(i-1) and R o(i-1) Respectively represent the diameters of the conductor and OPGW after ice coating at minute i-1, k di is the conductor diameter correction coefficient at the i-th minute, i is 0-M, M is the number of minutes the icing process lasts; through time-varying iteration, the conductor diameter correction coefficient k is rolled and corrected. d .

7. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method for determining the standard ice thickness of conductor ice coating based on OPGW optical cable monitoring data are implemented as described in any one of claims 1 to 4.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the standard ice thickness of conductor ice coating based on OPGW optical cable monitoring data as described in any one of claims 1 to 4 are implemented.

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