Wire icing standard ice thickness determination method and system based on OPGW optical cable monitoring data

Abstract

The invention belongs to the field of overhead transmission line operation and maintenance, and discloses a wire icing standard ice thickness determination method and system based on OPGW optical cable monitoring data, and the method comprises the steps: obtaining the optical fiber strain data of an OPGW optical cable after icing, and obtaining the standard ice thickness of the OPGW optical cable according to a strain-stress relation; working parameters of the OPGW optical cable and the wire are collected, and a terrain clearance correction coefficient, a wire diameter correction coefficient, a current-carrying capacity correction coefficient and a torsional rigidity correction coefficient are calculated respectively; and in combination with the OPGW optical cable standard ice thickness, the ground clearance correction coefficient, the wire diameter correction coefficient, the current-carrying capacity correction coefficient and the torsional rigidity correction coefficient, obtaining the wire icing standard ice thickness. By introducing a multi-factor correction coefficient, the calculation accuracy of the lead icing standard ice thickness is improved; meanwhile, the adaptability and the application range of the method are enhanced; an accurate basis is provided for operation and maintenance of the power transmission line; and technical innovation and development are promoted.

Description

Technical Field

[0001] The invention belongs to the field of overhead power transmission line operation and maintenance, and in particular relates to a method and system for determining a standard ice thickness of conductor ice coating based on OPGW optical cable monitoring data. Background Art

[0002] As an important part of the power system, transmission lines inevitably face the severe challenge of icing disasters. When the low temperature and humidity conditions are suitable, ice will quickly accumulate on the surface of the transmission line, which not only increases the weight of the line, but also may cause short circuits between wires and a sharp increase in mechanical stress. In severe cases, icing can cause a series of serious faults such as tower collapse, wire breakage, and insulator string loss in the transmission line, which greatly threatens the safe and stable operation of the large power grid, and also poses a major risk to the power supply security of important users.

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

[0004] At present, in order to effectively monitor the icing of transmission lines, many overhead transmission lines in operation have widely deployed optical fiber composite overhead ground wire (OPGW) cables. Optical fiber composite overhead ground wire OPGW (Optical Fiber Composite Overhead Ground Wire) cables are not only an advanced lightning protection measure that can effectively guide lightning current into the ground and protect the line from lightning damage; at the same time, they also cleverly integrate optical fiber sensing technology and can be used as sensors for icing monitoring. Through the optical fiber sensors installed on each tower along the line, the icing data of each point is collected and transmitted to the background monitoring system in real time, realizing remote, real-time and high-precision monitoring of the icing status of the transmission line.

[0005] However, although OPGW optical cables have shown great potential in ice monitoring, due to the significant differences in physical properties between conductors and OPGW, such as different heights above the ground, different conductor diameters, different current carrying capacities, and different torsional stiffness, the standard ice thickness data obtained directly from OPGW cannot be directly equated to the actual standard ice thickness of the conductor. This difference in detection brings difficulties to the operation and maintenance management and emergency repair decision-making of transmission lines, leading to low maintenance and operation efficiency. Summary of the invention

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

[0007] To achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a method for determining the standard ice thickness of a conductor based on OPGW optical cable monitoring data, comprising: Obtain the optical fiber strain data of the optical fiber composite overhead ground wire OPGW cable after ice coating, and obtain the standard ice thickness of the OPGW cable according to the strain-stress relationship; Collect the working parameters of OPGW optical cables and conductors, and calculate the correction factors for height above the ground, conductor diameter, current carrying capacity, and torsional stiffness; The standard ice thickness of the conductor is obtained by combining the standard ice thickness of the OPGW optical cable and the correction factor of the height above the ground, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor.

[0008] Further, the optical fiber strain data of the OPGW optical cable after ice coating is obtained, and the standard ice thickness of the OPGW optical cable is obtained according to the strain-stress relationship, including: The strain change data of the optical fiber is collected by the optical fiber sensor, and the standard ice thickness of the OPGW optical cable is calculated through the strain-stress relationship, combining the optical fiber material parameters, optical cable structure parameters and ice layer density.

[0009] Further, the calculation of the ground clearance correction coefficient includes: Collect the height of the conductor above the ground and the height of the OPGW above the ground at the three positions of the large, medium and small side hanging points of each conductor, and calculate the correction factor of the height above the ground based on the following parameters:

[0010] In the formula For the Correction factor for height of transmission line above ground, is the ground clearance correction factor at the large side mounting point, is the ground clearance correction factor at the center of the gear span, It is the correction factor of the height above the ground at the small side mounting point; , , Through the following formula we get:

[0011]

[0012]

[0013] In the formula, , , , , , 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:

[0014] In the formula is the height above the ground, in m, corresponding to , , , , , 6 parameters.

[0015] Furthermore, the wire diameter correction factor includes: The diameters of the collection conductor and OPGW optical cable when not covered with ice are expressed as and ;Correction factor for conductor diameter The calculation method is as follows:

[0016] In the formula, and Respectively represent At 15 minutes, 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 .

[0017] Further, the calculation of the current carrying capacity correction coefficient includes: 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. Current carrying capacity factor in minutes The calculation is as follows: .

[0018] Further, the calculation of the torsional stiffness correction coefficient includes:

[0019] is the torsional stiffness correction factor.

[0020] Furthermore, the standard ice thickness of the conductor ice coating 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:

[0021] In the formula, 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.

[0022] 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: OPGW optical cable standard ice thickness acquisition module, used to obtain the optical fiber strain data of OPGW optical cable after ice coating, and obtain the standard ice thickness of OPGW optical cable according to the strain-stress relationship; The correction coefficient acquisition module is used to collect the working parameters of the OPGW optical cable and the conductor, and calculate the correction coefficient of the height above the ground, the correction coefficient of the conductor diameter, the correction coefficient of the current carrying capacity and the correction coefficient of the torsional stiffness; The calculation output module is used to combine the standard ice thickness of the OPGW optical cable and 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 to obtain the standard ice thickness of the conductor ice.

[0023] Furthermore, the correction coefficient acquisition module is used to collect the working parameters of the OPGW optical cable and the conductor, and calculate the ground height correction coefficient, the conductor diameter correction coefficient, the current carrying capacity correction coefficient and the torsional stiffness correction coefficient, including: The calculation of the ground clearance correction coefficient includes: Collect the height of the conductor above the ground and the height of the OPGW above the ground at the three positions of the large, medium and small side hanging points of each conductor, and calculate the correction factor of the height above the ground based on the following parameters:

[0024] In the formula For the Correction factor for height of transmission line above ground, is the ground clearance correction factor at the large side mounting point, is the ground clearance correction factor at the center of the gear span, It is the correction factor of the height above the ground at the small side mounting point; , , Through the following formula we get:

[0025]

[0026]

[0027] In the formula, , , , , , 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:

[0028] In the formula is the height above the ground, in m, corresponding to , , , , , 6 parameters; The wire diameter correction factor includes: The diameters of the collection conductor and OPGW optical cable when not covered with ice are expressed as and ;Correction factor for conductor diameter The calculation method is as follows:

[0029] In the formula, and Respectively represent At 15 minutes, 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 ; The calculation of the current carrying capacity correction coefficient includes: 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. Current carrying capacity factor in minutes The calculation is as follows: ; The calculation of the torsional stiffness correction coefficient includes:

[0030] 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:

[0031] In the formula, 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.

[0032] In a third aspect, the present invention provides 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.

[0033] In a fourth aspect, the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method for determining the standard ice thickness of conductor ice coating based on OPGW optical cable monitoring data.

[0034] Compared with the prior art, the present invention has the following technical effects: This paper proposes a method for calculating the standard ice thickness of conductor ice based on OPGW (optical fiber composite overhead ground wire) monitoring data, aiming to solve the problem of inaccurate ice thickness monitoring caused by differences in the physical properties of the conductor and OPGW, which leads to low efficiency in transmission line maintenance and operation. By introducing and calculating the correction coefficient, this method can more accurately reflect the actual ice coverage of the conductor, provide a scientific basis for the anti-icing work of the transmission line, and significantly improve the efficiency and effect of operation and maintenance.

[0035] The present invention collects strain data of OPGW optical cables through optical fiber sensors, and combines optical fiber material parameters, optical cable structural parameters and ice layer density to calculate the standard ice thickness of OPGW optical cables using the strain-stress relationship. This step provides basic data for subsequent corrections and ensures the initial accuracy of monitoring.

[0036] The present invention considers multiple influencing factors such as height from the ground, conductor diameter, current carrying capacity and torsional stiffness, and calculates corresponding correction coefficients respectively. The introduction of these correction coefficients makes the final standard ice thickness of the conductor ice coating closer to the actual situation, and improves the accuracy of monitoring.

[0037] The invention collects the height above the ground of different positions of each conductor and the height above the ground of the OPGW to calculate the height above the ground correction coefficient. This correction takes into account the influence of terrain undulation and line layout on ice thickness, and enhances the adaptability of the method to different terrain and line conditions.

[0038] The present invention dynamically reflects the influence of these changes on ice thickness by iteratively calculating the wire diameter correction coefficient and the current carrying capacity correction coefficient, thereby improving the adaptability of the method.

[0039] The present invention provides different torsional stiffness correction coefficients for conductors with different split numbers. This correction takes into account the influence of the number of conductor splits on ice thickness, so that the method can be applied to different types of transmission lines.

[0040] The standard ice thickness of the conductor ice obtained by the present invention through the method is more accurate and reliable, providing a scientific basis for the operation and maintenance of the transmission line. The operation and maintenance personnel can timely evaluate the ice coverage of the line based on this data, formulate effective response measures, and reduce the failure and power outage events caused by ice coverage.

[0041] Since this method can monitor the ice coverage of the conductors in real time, it can provide early warning before the ice coverage reaches a dangerous level, which can buy precious repair time for operation and maintenance personnel and reduce the probability and scope of failure. Accurate ice coverage data can also help power departments optimize resource allocation, reasonably arrange operation and maintenance forces and material reserves, and improve overall operation and maintenance efficiency and economic benefits.

[0042] In summary, this technical solution improves the calculation accuracy of the standard ice thickness of conductor ice by introducing a multi-factor correction coefficient; at the same time, it enhances the adaptability and application scope of the method; provides an accurate basis for the operation and maintenance of transmission lines; and promotes technological innovation and development. Therefore, this technical solution has important practical value and promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with the accompanying drawings: 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: Obtain the optical fiber strain data of OPGW optical cable after ice coating, and obtain the standard ice thickness of OPGW optical cable according to the strain-stress relationship; Collect the working parameters of OPGW optical cables and conductors, and calculate the correction factors for height above the ground, conductor diameter, current carrying capacity, and torsional stiffness; The standard ice thickness of the conductor is obtained by combining the standard ice thickness of the OPGW optical cable and the correction factor of the height above the ground, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor.

[0045] The present invention first directly obtains the strain data of OPGW optical cable after ice coating through optical fiber sensor, and calculates the standard ice thickness of OPGW optical cable by using strain-stress relationship. This step provides a preliminary estimate of ice coating thickness, which provides a basis for subsequent correction.

[0046] Then, the method considered several key factors affecting ice thickness, such as height from the ground, conductor diameter, current carrying capacity and torsional stiffness, and calculated the corresponding correction coefficients. The introduction of these correction coefficients significantly improved the accuracy and reliability of the monitoring results, making the final standard ice thickness of the conductor closer to the actual situation.

[0047] The calculation of the height correction factor of the present invention takes into account the influence of terrain undulations and climate differences on ice thickness, making the method applicable to transmission line monitoring under different terrain and climate conditions. The calculation of the conductor diameter correction factor and the torsional stiffness correction factor fully considers the physical properties of the conductor itself, such as diameter change, number of splits, etc., enhancing the adaptability of the method to different types of conductors. The introduction of the current carrying capacity correction factor takes into account the influence of current carrying capacity changes on ice formation and melting, making the monitoring results more dynamic and accurate.

[0048] The accurate ice thickness data of the present invention provides timely warning and decision support for operation and maintenance personnel, which helps to take preventive measures before the ice reaches a dangerous level and reduce the risk of failure and power outage.

[0049] 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.

[0050] In summary, the method for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data provided by the present invention significantly improves the accuracy and reliability of monitoring results through precise calculation and correction steps; enhances the adaptability of the method to complex environments; improves operation and maintenance efficiency and safety; and promotes technological innovation and standardization development. The method has important practical value and application prospects, and provides a strong guarantee for the safe and stable operation of the power industry.

[0051] Embodiment 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: Firstly, the standard ice thickness of OPGW conductors is calculated by the correlation between ice thickness and optical fiber strain. Then, the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor and torsional stiffness correction factor are calculated according to the specific parameters of the ice-covered ground wire. By applying the ground height correction factor, conductor diameter correction factor, current carrying capacity correction factor and torsional stiffness correction factor, the standard ice thickness of the conductor is calculated. This method takes into account the differences between ground wires and can effectively improve the accuracy of measuring the standard ice thickness of transmission line conductors.

[0052] The calculation formula of the standard ice thickness of the conductor is as follows:

[0053] In the formula, 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.

[0054] Calculation method of ground clearance correction factor.

[0055] For the i-th wire, the calculation method of the ground height correction coefficient is as follows: Collect the ground clearance data of the conductor and OPGW at the three locations of the large side hanging point, the middle point and the small side hanging point of each conductor, and calculate the ground clearance correction coefficient based on the following parameters.

[0056]

[0057] In the formula For the Correction factor for height of transmission line above ground, is the ground clearance correction factor at the large side mounting point, is the ground clearance correction factor at the center of the gear span, It is the correction factor for the height above the ground at the small side mounting point.

[0058] Assume that the height of the opgw hanging point from the ground at the large side hanging point is , the height of the large side hanging point of the conductor from the ground is

[0059]

[0060]

[0061] In the formula, , , , , , 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:

[0062] In the formula is the height above the ground, in m, corresponding to , , , , , 6 parameters.

[0063] Calculation method of wire diameter correction factor.

[0064] 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:

[0065] In the formula, and Respectively represent At 15 minutes, the diameter of the conductor and OPGW after ice coating, For the Minute wire diameter correction factor, The value is . Through time-varying iterations, rolling correction of the wire diameter correction factor .

[0066] Ampacity correction factor.

[0067] The current meter that keeps the ice amount balanced under the conditions of LGJ-400 / 35 conductor ice thickness of 10mm, temperature of -5℃ and wind speed of 10m / s is . No. Current carrying capacity factor in minutes The calculation is as follows:

[0068] 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.

[0069] Torsional stiffness correction factor The calculation method of the conductor torsional stiffness correction factor is as follows: .

[0070] During the design and implementation of this method, multiple differences between the conductor and OPGW (optical composite overhead ground wire) were deeply considered, including but not limited to their respective heights above the ground, whether they are energized, the diameter of the conductor, and the number of conductor splits. These factors will have a significant impact on the thickness of the conductor ice, so in order to obtain accurate ice thickness data, careful corrections must be made.

[0071] First, the method collects the height of the conductor and OPGW at different locations above the ground and calculates the correction coefficient of the height above the ground to eliminate the influence of terrain undulation and line layout on the ice thickness measurement. This step ensures that relatively accurate ice thickness data can be obtained regardless of the height of the conductor.

[0072] Secondly, considering that the change of conductor diameter will directly affect the accumulation and distribution of ice, the method introduces a conductor diameter correction factor. By real-time monitoring of the diameter changes of the conductor and OPGW and adjusting the correction factor accordingly, the impact of ice on the actual diameter of the conductor can be more accurately reflected.

[0073] Furthermore, as an important parameter of conductor operation, current carrying capacity will also affect the formation and melting process of ice. The method takes into account the influence of heat generated by current on ice thickness by calculating the current carrying capacity correction coefficient, thereby improving the accuracy of monitoring results.

[0074] In addition, for different types of conductors, such as single conductors and split conductors, their torsional stiffness is different, which will also affect the thickness and distribution of ice. Therefore, the method also introduces a torsional stiffness correction factor to meet the ice monitoring needs of different types of conductors.

[0075] After the above series of corrections, this method can obtain a more objective standard ice thickness for conductor ice coating. This data not only provides an accurate basis for conductor anti-icing work, enabling operation and maintenance personnel to promptly discover and deal with potential ice coating hazards, but also greatly improves the quality and efficiency of operation and maintenance of transmission lines. By reducing power outages caused by ice coating and optimizing the allocation of operation and maintenance resources, this method has made an important contribution to the safe and stable operation of the power industry.

[0076] In yet another embodiment of the present invention, a system for determining the standard ice thickness of a 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 a conductor ice coating based on OPGW optical cable monitoring data. Specifically, the system includes: OPGW optical cable standard ice thickness acquisition module, used to obtain the optical fiber strain data of OPGW optical cable after ice coating, and obtain the standard ice thickness of OPGW optical cable according to the strain-stress relationship; The correction coefficient acquisition module is used to collect the working parameters of the OPGW optical cable and the conductor, and calculate the correction coefficient of the height above the ground, the correction coefficient of the conductor diameter, the correction coefficient of the current carrying capacity and the correction coefficient of the torsional stiffness; The calculation output module is used to combine the standard ice thickness of the OPGW optical cable and 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 to obtain the standard ice thickness of the conductor ice.

[0077] The division of modules in the embodiments of the present invention is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present invention may be integrated into one processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0078] In another embodiment of the present invention, a computer device is provided, the computer device comprising a processor and a memory, the memory being used to store a computer program, the computer program comprising program instructions, and the processor being used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for 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 the embodiment of the present invention can be used for the operation of the method for determining the standard ice thickness of the conductor ice based on the OPGW optical cable monitoring data.

[0079] In another embodiment of the present invention, the present invention further provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can 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 a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor can load and execute 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 the conductor ice based on the OPGW optical cable monitoring data in the above embodiment.

[0080] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. 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 disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0081] 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 flowchart and / or block diagram, as well as the combination of processes and / or blocks 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 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 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.

[0082] 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.

[0083] 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 The steps for the functions specified in one or more boxes.

[0084] Finally, 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 above embodiments, ordinary technicians in the relevant 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 within 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 the optical fiber strain data of the optical fiber composite overhead ground wire OPGW cable after ice coating, and obtain the standard ice thickness of the OPGW cable according to the strain-stress relationship; Collect the working parameters of OPGW optical cables and conductors, and calculate the correction factors for height above the ground, conductor diameter, current carrying capacity, and torsional stiffness; The standard ice thickness of the conductor is obtained by combining the standard ice thickness of the OPGW optical cable and the correction factor of the height above the ground, the conductor diameter correction factor, the current carrying capacity correction factor, and the torsional stiffness correction factor.

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, and the standard ice thickness of the OPGW optical cable is calculated through the strain-stress relationship, combining the optical fiber material parameters, optical cable structure parameters and ice layer density.

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 height of the conductor above the ground and the height of the OPGW above the ground at the three positions of the large, medium and small side hanging points of each conductor, and calculate the correction factor of the height above the ground based on the following parameters: In the formula For the Correction factor for height of transmission line above ground, is the ground clearance correction factor at the large side mounting point, is the ground clearance correction factor at the center of the gear span, It is the correction factor of the height above the ground at the small side mounting point; , , Through the following formula we get: In the formula, , , , , , 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: In the formula is the height above the ground, in m, corresponding to , , , , , 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 expressed as and ;Correction factor for conductor diameter The calculation method is as follows: In the formula, and Respectively represent At 15 minutes, 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 .

5. 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 current carrying capacity correction coefficient includes: 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. Current carrying capacity factor in minutes The calculation is as follows: 。 6. 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 torsional stiffness correction coefficient includes: is the torsional stiffness correction factor.

7. 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 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: In the formula, 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.

8. A system for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data, characterized in that: include: OPGW optical cable standard ice thickness acquisition module, used to obtain the optical fiber strain data of OPGW optical cable after ice coating, and obtain the standard ice thickness of OPGW optical cable according to the strain-stress relationship; The correction coefficient acquisition module is used to collect the working parameters of the OPGW optical cable and the conductor, and calculate the correction coefficient of the height above the ground, the correction coefficient of the conductor diameter, the correction coefficient of the current carrying capacity and the correction coefficient of the torsional stiffness; The calculation output module is used to combine the standard ice thickness of the OPGW optical cable and 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 to obtain the standard ice thickness of the conductor ice.

9. The system for determining the standard ice thickness of conductor ice based on OPGW optical cable monitoring data according to claim 8, characterized in that: The correction coefficient acquisition module is used to collect the working parameters of the OPGW optical cable and conductor, and calculate the ground height correction coefficient, conductor diameter correction coefficient, current carrying capacity correction coefficient and torsional stiffness correction coefficient, including: The calculation of the ground clearance correction coefficient includes: Collect the height of the conductor above the ground and the height of the OPGW above the ground at the three positions of the large, medium and small side hanging points of each conductor, and calculate the correction factor of the height above the ground based on the following parameters: In the formula For the Correction factor for height of transmission line above ground, is the ground clearance correction factor at the large side mounting point, is the ground clearance correction factor at the center of the gear span, It is the correction factor of the height above the ground at the small side mounting point; , , Through the following formula we get: In the formula, , , , , , 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: In the formula is the height above the ground, in m, corresponding to , , , , , 6 parameters; The wire diameter correction factor includes: The diameters of the collection conductor and OPGW optical cable when not covered with ice are expressed as and ;Correction factor for conductor diameter The calculation method is as follows: In the formula, and Respectively represent At 15 minutes, 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 ; The calculation of the current carrying capacity correction coefficient includes: 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. Current carrying capacity factor in minutes The calculation is as follows: ； The calculation of the torsional stiffness correction coefficient includes: 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: In the formula, 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.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: 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 as described in any one of claims 1 to 7 are implemented.

11. 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 7 are implemented.

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