Capacitance calculation method for icing monitoring of power transmission line
By establishing a capacitance calculation model for a cylindrical multi-electrode array, the problem of low measurement accuracy of capacitive icing monitoring methods in thin ice layers in existing technologies has been solved, achieving high-precision measurement of 0-10mm thin ice layers and accurate inversion of ice thickness.
Patent Information
- Application Number
- CN202511459569.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-13
- Publication Date
- 2026-01-09
AI Technical Summary
Existing capacitive icing monitoring methods do not fully consider the electrode edge effect, the combined effect of multiple dielectric layers, and the mutual capacitance effect between array electrodes, resulting in low accuracy when measuring thin ice layers, especially in the 0-10mm range where high-precision measurement is difficult to achieve.
A capacitance calculation method based on a cylindrical multi-electrode array is established. By equating a single three-electrode array to two parallel circular ring capacitors, and combining the parallel plate capacitance formula and edge capacitance theory, edge effects and mutual capacitance effects are considered to establish an accurate capacitance calculation model.
It significantly improves the accuracy of capacitance calculation models, and is particularly suitable for high-precision measurement of thin ice layers of 0-10mm. It provides a quantitative relationship between ice thickness and equivalent dielectric constant, and provides a theoretical basis for the accurate inversion of ice thickness.
Smart Images
Figure CN121303031A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of online monitoring technology for power transmission lines, and specifically relates to a capacitance calculation method for monitoring icing on power transmission lines. Background Technology
[0002] Icing on transmission lines is one of the serious natural disasters that power grids face during winter operation in cold regions. Icing can lead to accidents such as line galloping, line breakage, and collapse, seriously threatening the safe operation of the power grid. Icing monitoring technologies mainly include image recognition methods, tension sensor methods, and weather forecasting methods, but these methods have problems such as complex installation, great susceptibility to environmental influences, and low measurement accuracy.
[0003] Capacitive sensing has gained widespread attention in the field of icing monitoring in recent years due to its advantages such as fast response speed, simple structure, and real-time online monitoring capability. Capacitive ice thickness measurement is based on the principle of dielectric constant difference, inverting ice thickness by measuring the change in capacitance between electrodes. However, most capacitive measurement methods in related technologies do not fully consider electrode edge effects, the combined effects of multiple dielectric layers, and the mutual capacitance effect between array electrodes, resulting in inaccurate capacitance measurement models and limited applicability.
[0004] Especially in measuring thin ice layers, i.e., ice thickness within the range of 0-10mm, related technologies struggle to achieve high-precision measurements, which is precisely the critical data range for transmission line anti-icing and de-icing decisions. Furthermore, existing capacitance calculation models often neglect the mutual influence between electrode arrays, leading to significant measurement errors in practical applications.
[0005] Therefore, there is an urgent need in this field for a theoretical method that can accurately calculate the capacitance value of a multi-electrode array under icing conditions, so as to provide a reliable technical basis for the accurate inversion of icing thickness. Summary of the Invention
[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for calculating the ice capacitance value between multiple electrodes for monitoring icing of transmission lines. This method can accurately calculate the capacitance value of a cylindrical multi-electrode array in an icing environment, and is particularly suitable for precise measurement of ice thickness in the range of 0~10mm. At the same time, it establishes a quantitative relationship between ice thickness and equivalent dielectric constant, providing a theoretical basis for the accurate inversion of ice thickness.
[0007] The first aspect of this invention provides a capacitance calculation method for monitoring icing on transmission lines. The method includes: establishing a basic model that equates a single three-electrode array to two parallel-connected circular capacitors to obtain a simulation model of an ice-observation device. The ice-observation device is installed on the transmission line for monitoring icing. The device is a cylindrical multi-electrode array composed of multiple parallel-connected three-electrode arrays. Each three-electrode array consists of three parallel and coaxially mounted circular electrode plates on an insulating support tube. Two adjacent circular electrode plates are equivalent to a single circular capacitor. The method is based on the parallel plate capacitance formula. A parallel plate capacitance calculation model between two adjacent circular ring electrode plates is established using calculus and circuit equivalence methods. Based on the parallel plate edge effect and electric field theory, an edge capacitance calculation model for the circular ring capacitor is established. Combining the parallel plate capacitance calculation model and the edge capacitance calculation model, a capacitance calculation model for a single circular ring capacitor is obtained. The capacitance calculation model for a single circular ring capacitor and the mutual capacitance between adjacent three-electrode arrays are introduced into the simulation model to obtain a capacitance calculation model for a cylindrical multi-electrode array. The dielectric constant is substituted into the capacitance calculation model for the cylindrical multi-electrode array to obtain the capacitance value of the cylindrical multi-electrode array.
[0008] Furthermore, in some embodiments of this disclosure, after substituting the dielectric constant into the capacitance calculation model of the cylindrical multi-electrode array to obtain the capacitance value of the cylindrical multi-electrode array, the method further includes: establishing a quantitative relationship between the ice thickness of the transmission line icing and the dielectric constant; substituting the quantitative relationship into the capacitance calculation model of the cylindrical multi-electrode array to obtain a relationship model between the ice thickness and the capacitance value; and using the relationship model between the ice thickness and the capacitance value to deduce the ice thickness of the transmission line icing by actually measuring the capacitance value.
[0009] In some embodiments of this disclosure, after establishing an edge capacitance calculation model for a circular capacitor based on the parallel plate edge effect and electric field theory, the method further includes: when the ratio of the height of the circular electrode plate to the thickness of the ice layer is lower than a preset threshold, the parallel plate edge effect is considered weak; an attenuation factor is determined based on the ratio of the height of the circular electrode plate to the thickness of the ice layer, and an attenuation factor is introduced into the edge capacitance calculation model to adjust the edge capacitance calculation model.
[0010] A second aspect of the present invention provides a capacitance calculation device for monitoring icing on transmission lines. The device includes: a simulation module, which is used to obtain a simulation model of an ice-observation device by establishing a basic model that equates a single three-electrode array to two parallel circular ring capacitors. The ice-observation device is installed on the transmission line for monitoring icing. The ice-observation device is a cylindrical multi-electrode array composed of multiple parallel three-electrode arrays. Each three-electrode array consists of three parallel and coaxially mounted circular ring electrode plates on an insulating support tube. Two adjacent circular ring electrode plates are equivalent to a single circular ring capacitor. A parallel plate capacitance calculation module is used to establish the capacitance calculation model of two adjacent circular rings based on the parallel plate capacitance formula using calculus and circuit equivalence methods. The system includes: a parallel plate capacitance calculation model between electrode plates; an edge capacitance calculation module, which establishes an edge capacitance calculation model for a circular ring capacitor based on the parallel plate edge effect and electric field theory; a single capacitance calculation module, which combines the parallel plate capacitance calculation model and the edge capacitance calculation model to obtain the capacitance calculation model for a single circular ring capacitor; a mutual capacitance correction module, which incorporates the capacitance calculation model of a single circular ring capacitor and the mutual capacitance between adjacent three-electrode arrays into the simulation model to obtain the capacitance calculation model for a cylindrical multi-electrode array; and a total capacitance calculation module, which substitutes the dielectric constant into the capacitance calculation model of the cylindrical multi-electrode array to obtain the capacitance value of the cylindrical multi-electrode array.
[0011] A third aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes a capacitance calculation method for monitoring icing on transmission lines provided in the first aspect.
[0012] A fourth aspect of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the capacitance calculation method for monitoring icing on transmission lines provided in the first aspect.
[0013] The fifth aspect of the present invention provides a computer program product, which includes computer instructions that instruct a computer to execute the capacitance calculation method for monitoring icing on transmission lines provided in the first aspect above.
[0014] The sixth aspect of the present invention provides a transmission line icing monitoring system, which includes a capacitance calculation device for transmission line icing monitoring provided in the second aspect above or an electronic device provided in the third aspect above.
[0015] Compared with related technologies, the present invention has the following beneficial effects: This invention is based on a cylindrical multi-electrode array structure, which fully considers the electrode edge effect, the composite effect of multilayer dielectrics, and the mutual capacitance effect between array electrodes to establish an accurate capacitance calculation model. This model can significantly improve the accuracy of the capacitance calculation model, making it particularly suitable for high-precision measurement of thin ice layers of 0-10mm. At the same time, it establishes a quantitative relationship between ice layer thickness and equivalent dielectric constant, providing a theoretical basis for the accurate inversion of ice layer thickness. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A flowchart of a capacitance calculation method for monitoring icing on transmission lines provided by this invention; Figure 2 The present invention provides a circuit diagram in which a three-electrode array is equivalent to two circular ring capacitors connected in parallel; Figure 3 This is a schematic diagram of a cylindrical three-electrode array provided by the present invention; Figure 4 This invention provides a schematic diagram of the electric field distribution at the edge of a parallel plate. Figure 5 This invention provides a schematic diagram of the electric field path of a circular ring edge capacitor. Figure 6 A schematic diagram of the relationship between capacitance and equivalent dielectric constant provided by the present invention; Figure 7 An example diagram of a capacitance calculation device for monitoring icing on power transmission lines provided by the present invention. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and marked in the accompanying drawings can generally be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0021] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0022] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0023] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.
[0024] The present invention will now be described in further detail with reference to the accompanying drawings: See Figure 1 This invention discloses a capacitance calculation method for monitoring icing on transmission lines, comprising the following steps: S101. By establishing a basic model that equates a single three-electrode array to two circular capacitors connected in parallel, a simulation model of the ice-observing device is obtained.
[0025] In the embodiments of this disclosure, the ice observation device is installed on the power transmission line for monitoring the icing of the power transmission line. The ice observation device is a cylindrical multi-electrode array composed of multiple three-electrode arrays connected in parallel.
[0026] In the embodiments of this disclosure, the three-electrode array is composed of three parallel and coaxially arranged circular electrode plates fitted onto an insulating support tube. An insulating ring is installed between every two adjacent circular electrode plates, and two adjacent circular electrode plates are equivalent to a single circular capacitor. Figure 2 A circuit diagram is provided that represents a three-electrode array equivalent to two circular ring capacitors connected in parallel, such as... Figure 2 As shown, a single three-electrode array is equivalent to two circular ring capacitors connected in parallel, denoted as a three-electrode unit, and the three-electrode units are connected in parallel with each other.
[0027] In some embodiments, the structure of the three-electrode array is as follows: Figure 3 As shown, the inner side of the three-electrode array is an insulating support tube, the inner side of the three-electrode array is a power transmission line conductor, and the outer side of the three-electrode array is an ice layer.
[0028] In some embodiments, the three-electrode array is formed by connecting an excitation electrode W, an insulating ring, an induction electrode Y, an insulating ring, and an excitation electrode Z in sequence along the conductor axis direction of the transmission line. The excitation electrode W and the induction electrode Y form a circular capacitor, and the excitation electrode Z and the induction electrode Y form a circular capacitor.
[0029] In the embodiments of this disclosure, a single three-electrode array is equivalent to two circular ring capacitors connected in parallel, and the entire ice observer is regarded as a cylindrical multi-electrode array of N three-electrode arrays connected in parallel, where N is a natural number. The expression of the simulation model of the ice observer device is as follows: C = 2N(C1 + C2 + C3) (Formula 1) In Formula 1, C is the initial total capacitance of the cylindrical multi-electrode array, C1 and C2 are the theoretical edge capacitances of the ring capacitor, C1 is the capacitance generated by the edge effect of ice covering / external environment on the outside of the ring capacitor, C2 is the capacitance generated by the edge effect of the insulating support tube on the inside of the ring capacitor, and C3 is the ideal parallel plate capacitance between two adjacent ring electrode plates when the edge effect is ignored.
[0030] S102, based on the parallel plate capacitance formula, establishes a parallel plate capacitance calculation model between two adjacent circular annular electrode plates through calculus and circuit equivalence method.
[0031] In some embodiments, the expression for the parallel plate capacitance calculation model is: C3'= [ε3π(D e 2 - D s 2 )] / (4Hi ) (Formula 2) In Formula 2, C3' is the calculated parallel plate capacitance between two adjacent annular electrode plates, and ε3 is the dielectric constant of the insulating support tube; D e D is the outer diameter of the annular electrode plate. s H is the outer diameter of the insulating support tube; i This is the height of the insulating ring.
[0032] S103. Based on the parallel plate edge effect and electric field theory, a calculation model for the edge capacitance of a circular ring capacitor is established.
[0033] In some embodiments, considering the parallel plate edge effect, the edge of the parallel plate is regarded as a cable structure, and the edge capacitance formula is derived based on electric field theory. A schematic diagram of the electric field distribution at the edge of the parallel plate is shown below. Figure 4 As shown, for edge effects in one direction, the theoretical formula for edge capacitance per unit length is: Cu= εb / d + ε / π {1 + ln[1 + πb / d + ln(1 + πb / d)]} (Formula 3) In Formula 3, ε is the equivalent dielectric constant, b is the half-width of the plates of the circular capacitor, and d is the distance between the plates of the circular capacitor.
[0034] Furthermore, in some embodiments, through analysis of the electric field at the edges of the inner and outer rings of the circular capacitor, the electric field path of the circular ring edge capacitor is as follows: Figure 5 As shown, C air-b This indicates the path from the electrode downwards to the shielding layer or grounding layer, forming an air capacitor; C n Indicates the path of the near-field coupling capacitor, C m Indicates the path of the main test capacitor, C ice Indicates the path of additional capacitance formed by ice layer, C air-k The path from the electrode to the external open space forms an air capacitor. The inner and outer rings of the circular ring are regarded as the edges of parallel plates, respectively. Based on the theoretical formula of edge capacitance per unit length, the edge capacitances C1' and C2' of the circular ring capacitor are derived. The expressions for C1' and C2' are shown in Formula 4 and Formula 5, respectively. C1'= ε1D e {1 + ln[1 + (πd e / H i ) + ln(1 + πd e / H i )]} (Formula 4) C2'= ε2D s {1 + ln[1 + (πd e / H i ) + ln(1 + πde / H i )]} (Formula 5) In Formulas 4 and 5, C1' is the calculated capacitance generated by the edge effect of the inner insulating support tube of the circular ring capacitor, C2' is the calculated capacitance generated by the edge effect of the inner insulating support tube of the circular ring capacitor, ε1 is the equivalent dielectric constant of the icing / external environment, ε2 is the equivalent dielectric constant along the path of the capacitance generated by the edge effect of the inner support column, and d e This represents the physical thickness of the annular electrode plate.
[0035] S104, combining the parallel plate capacitance calculation model and the edge capacitance calculation model, yields the capacitance calculation model for a single circular capacitor.
[0036] In some embodiments, the expression for the capacitance calculation model of a single circular ring capacitor is: C'= [ε3π(D e 2 - D s 2 )] / (4H i ) + (ε2D s + ε1D e ) {1 + ln[1 + (πd e / H i ) +ln(1 + πd e / H i )]} (Formula 6) In Formula 6, C' is the calculated capacitance value of a single circular capacitor, which is the sum of C1', C2', and C3'.
[0037] S105, the capacitance calculation model of a single circular ring capacitor and the mutual capacitance between adjacent three-electrode arrays are introduced into the simulation model to obtain the capacitance calculation model of a cylindrical multi-electrode array.
[0038] In some embodiments, a three-electrode array consists of two circular ring capacitors connected in parallel, denoted as a three-electrode unit. The capacitance value of the three-electrode unit can be derived from the calculated capacitance value C' of a single circular ring capacitor as C″ = 2C'.
[0039] In some embodiments, considering the mutual capacitance effect between adjacent three-electrode units, the mutual capacitance between adjacent three-electrode arrays is introduced into the simulation model, and the expression for the total capacitance of the cylindrical multi-electrode array is obtained as follows: Call = 2N (C1 + C2 + C3) + CH (Formula 7) Furthermore, by incorporating the capacitance calculation model of a single circular ring capacitor into Equation 7, the final expression for the total capacitance of the cylindrical multi-electrode array is obtained as follows: Call = 2N C' + CH (Formula 8) In some embodiments, CH is the mutual capacitance between adjacent electrode units, and the calculation formula is: CH = 2(N-1) { [ε3π(D e 2 - D s 2 ) / (4(H i +H'))] × [H i / (H i +H')] + [ε3π(D e 2 -D s 2 ) / (4(3H i +H'))] × [2H i / (3H i +H')]} (Formula 9) In Formula 9, H' is the spacing between adjacent three-electrode units.
[0040] S106, substitute the dielectric constant into the capacitance calculation model of the cylindrical multi-electrode array to obtain the capacitance value of the cylindrical multi-electrode array.
[0041] In embodiments of this disclosure, the capacitance calculation model includes the relationship between the capacitance value and the equivalent dielectric constant of a cylindrical multi-electrode array, allowing the acquisition of this relationship, such as... Figure 6 This disclosure provides a curve showing the relationship between capacitance value and equivalent dielectric constant. Therefore, after determining the equivalent dielectric constant, the capacitance value can be calculated using a capacitance calculation model. Furthermore, the ice layer thickness is related to the equivalent dielectric constant. After confirming the quantitative relationship between ice layer thickness and dielectric constant, the ice layer thickness can be deduced from the actual measured capacitance value using the capacitance calculation model, thus achieving accurate monitoring of the ice layer thickness.
[0042] In some embodiments of this disclosure, after substituting the dielectric constant into the capacitance calculation model of the cylindrical multi-electrode array to obtain the capacitance value of the cylindrical multi-electrode array, the method further includes: establishing a quantitative relationship between the ice thickness of the transmission line icing and the dielectric constant; substituting the quantitative relationship into the capacitance calculation model of the cylindrical multi-electrode array to obtain a relationship model between the ice thickness and the capacitance value; and using the relationship model between the ice thickness and the capacitance value to deduce the ice thickness of the transmission line icing by actually measuring the capacitance value.
[0043] In some embodiments of this disclosure, after establishing an edge capacitance calculation model for a circular capacitor based on the parallel plate edge effect and electric field theory, the method further includes: when the ratio of the height of the circular electrode plate to the thickness of the ice layer is lower than a preset threshold, the parallel plate edge effect is considered weak; an attenuation factor is determined based on the ratio of the height of the circular electrode plate to the thickness of the ice layer, and an attenuation factor is introduced into the edge capacitance calculation model to adjust the edge capacitance calculation model.
[0044] In summary, this disclosure provides a capacitance calculation method for transmission line icing monitoring. Based on a cylindrical three-electrode array structure, it establishes a precise capacitance calculation model incorporating edge effects and mutual capacitance effects, significantly improving the accuracy of the capacitance calculation model. This makes it particularly suitable for high-precision measurement of 0-10mm thin ice layers. A quantitative relationship between ice thickness and equivalent dielectric constant is established, providing a theoretical basis for accurate ice thickness inversion and enabling precise monitoring of ice thickness. Furthermore, the applicable scope and limitations of the model are clarified, indicating that when the electrode height is much smaller than the ice height, the edge effect weakens, requiring corresponding adjustments to the model. This method has a clear structure, well-defined parameters, and good engineering applicability, and can be directly applied to online monitoring systems for transmission line icing.
[0045] One embodiment of the present invention, such as Figure 7 As shown, a capacitance calculation system for monitoring icing on transmission lines is provided, comprising: Simulation module 210 is used to obtain a simulation model of the ice observation device by establishing a basic model that equates a single three-electrode array to two circular ring capacitors connected in parallel. The ice observation device is installed on the power transmission line for monitoring the icing of the power transmission line. The ice observation device is a cylindrical multi-electrode array composed of multiple three-electrode arrays connected in parallel. The three-electrode array is composed of three circular ring electrode plates that are parallel and coaxially fitted on an insulating support tube. Two adjacent circular ring electrode plates are equivalent to a single circular ring capacitor. Parallel plate capacitance calculation module 220 is used to establish a parallel plate capacitance calculation model between two adjacent circular annular electrode plates based on the parallel plate capacitance formula, using calculus and circuit equivalence methods. The edge capacitance calculation module 230 is used to establish an edge capacitance calculation model for a circular capacitor based on the parallel plate edge effect and electric field theory. The single capacitance calculation module 240 is used to combine the parallel plate capacitance calculation model and the edge capacitance calculation model to obtain the capacitance calculation model of a single circular capacitor. The mutual capacitance correction module 250 is used to introduce the capacitance calculation model of a single circular ring capacitor and the mutual capacitance between adjacent three-electrode arrays into the simulation model to obtain the capacitance calculation model of a cylindrical multi-electrode array. The total capacitance calculation module 260 is used to substitute the dielectric constant into the capacitance calculation model of the cylindrical multi-electrode array to obtain the total capacitance value of the cylindrical multi-electrode array.
[0046] It should be noted that the specific implementation methods of the embodiments disclosed herein are different from those of the embodiments in this paper. Figure 1 The principle of the embodiments shown is the same, and will not be repeated here.
[0047] One embodiment of the present invention provides an electronic device including a processor and a memory. The memory stores a computer program, which includes program instructions. The processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or 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 and control core of the terminal, suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions to achieve a corresponding method flow or corresponding function. The processor described in this embodiment can be used for the operation of a capacitance calculation method for monitoring icing on transmission lines.
[0048] In one embodiment of the present invention, a storage medium is also provided, specifically a computer-readable storage medium (Memory), which is a memory device in a terminal device for storing programs and data. It is understood that the computer-readable storage medium here can include both built-in storage media in the terminal device and extended storage media supported by the terminal device; it can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. The computer-readable storage medium provides storage space that stores the terminal's operating system. Furthermore, the storage space also stores one or more instructions suitable for loading and execution by a processor, which can be one or more computer programs (including program code). It should be noted that more specific examples (a non-exhaustive list) of the computer-readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the foregoing.
[0049] Computer-readable storage media also include data signals propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable storage medium can also be any readable medium other than a readable storage medium that can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the readable storage medium can be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.
[0050] Program code for performing the operations of this invention can be written in any combination of one or more programming languages, including object-oriented programming languages such as Java and C++, and conventional procedural programming languages such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).
[0051] One or more instructions stored in a computer-readable storage medium can be loaded and executed by a processor to implement the corresponding steps of the capacitance calculation method for monitoring icing on transmission lines in the above embodiments.
[0052] One embodiment of the present invention provides a computer program product containing computer instructions for guiding a computer to execute a capacitance calculation method for monitoring icing on transmission lines. By establishing an accurate capacitance calculation model that includes edge effects and mutual capacitance effects, the accuracy of the capacitance calculation model can be significantly improved.
[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A capacitance calculation method for monitoring icing on transmission lines, characterized in that, The method includes: By establishing a basic model that equates a single three-electrode array to two parallel circular capacitors, a simulation model of an ice-observation device is obtained. The ice-observation device is installed on a power transmission line for monitoring ice accumulation on the power transmission line. The ice-observation device as a whole is a cylindrical multi-electrode array composed of multiple three-electrode arrays connected in parallel. The three-electrode array is composed of three parallel and coaxial circular electrode plates fitted onto an insulating support tube. Two adjacent circular electrode plates are equivalent to a single circular capacitor. Based on the parallel plate capacitance formula, a calculation model of the parallel plate capacitance between two adjacent annular electrode plates is established by using calculus and circuit equivalence method. Based on the parallel plate edge effect and electric field theory, a calculation model for the edge capacitance of the circular capacitor is established. By combining the parallel plate capacitance calculation model and the edge capacitance calculation model, a capacitance calculation model for a single circular capacitor is obtained. The capacitance calculation model of a single circular ring capacitor and the mutual capacitance between adjacent three-electrode arrays are introduced into the simulation model to obtain the capacitance calculation model of the cylindrical multi-electrode array. Substituting the dielectric constant into the capacitance calculation model of the cylindrical multi-electrode array, the capacitance value of the cylindrical multi-electrode array is obtained.
2. The capacitance calculation method for monitoring icing on transmission lines according to claim 1, characterized in that, After substituting the dielectric constant into the capacitance calculation model of the cylindrical multi-electrode array to obtain the capacitance value of the cylindrical multi-electrode array, the method further includes: Establish a quantitative relationship between the ice thickness of transmission lines and the dielectric constant; Substituting the quantitative relationship into the capacitance calculation model of the cylindrical multi-electrode array, a relationship model between ice layer thickness and capacitance value is obtained; By actually measuring the capacitance value, the ice thickness of the transmission line can be deduced using the relationship model between the ice thickness and the capacitance value.
3. The capacitance calculation method for monitoring icing on transmission lines according to any one of claims 1 and 2, characterized in that, After establishing the edge capacitance calculation model of the circular capacitor based on the parallel plate edge effect and electric field theory, the method further includes: When the ratio of the height of the annular electrode plate to the thickness of the ice layer is lower than a preset threshold, the edge effect of the parallel plate is considered weak. The attenuation factor is determined based on the ratio of the height of the annular electrode plate to the thickness of the ice layer. The attenuation factor is then introduced into the edge capacitance calculation model to adjust the edge capacitance calculation model.
4. A capacitance calculation device for monitoring icing on transmission lines, characterized in that, The device includes: The simulation module is used to obtain a simulation model of the ice observation device by establishing a basic model that equates a single three-electrode array to two parallel circular capacitors. The ice observation device is installed on the power transmission line for monitoring ice accumulation on the power transmission line. The ice observation device is a cylindrical multi-electrode array composed of multiple three-electrode arrays connected in parallel. The three-electrode array is composed of three parallel and coaxial circular electrode plates fitted on an insulating support tube. Two adjacent circular electrode plates are equivalent to a single circular capacitor. A parallel plate capacitance calculation module is used to establish a parallel plate capacitance calculation model between two adjacent annular electrode plates based on the parallel plate capacitance formula, using calculus and circuit equivalence methods. An edge capacitance calculation module is used to establish an edge capacitance calculation model for the circular capacitor based on the parallel plate edge effect and electric field theory. A single capacitance calculation module is used to combine the parallel plate capacitance calculation model and the edge capacitance calculation model to obtain the capacitance calculation model of a single ring capacitor. A mutual capacitance correction module is used to introduce the capacitance calculation model of a single circular ring capacitor and the mutual capacitance between adjacent three-electrode arrays into the simulation model to obtain the capacitance calculation model of the cylindrical multi-electrode array. The total capacitance calculation module is used to substitute the dielectric constant into the capacitance calculation model of the cylindrical multi-electrode array to obtain the capacitance value of the cylindrical multi-electrode array.
5. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the capacitance calculation method for monitoring icing on transmission lines as described in any one of claims 1-3.
6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the capacitance calculation method for monitoring icing on transmission lines as described in any one of claims 1-6.
7. A computer program product, said computer program product comprising computer instructions, characterized in that, The computer instructions instruct the computer to execute the capacitance calculation method for monitoring icing on transmission lines as described in any one of claims 1-6.
8. A transmission line icing monitoring system, characterized in that, The transmission line icing monitoring system includes the capacitance calculation device for transmission line icing monitoring as described in claim 4, or the electronic device as described in claim 5.