A method, system, device, and medium for de-icing a power distribution line switch

Abstract

The application discloses an ice melting method, system, device and medium for a power distribution line switch, comprising: in response to the need of ice melting of the power distribution line switch, transmitting the icing parameters of the power distribution line switch collected by an icing monitoring unit to a control unit; preprocessing the icing parameters to determine icing derived parameters; preliminarily judging the icing state of the power distribution line switch based on the preprocessed icing parameters; accurately judging the icing state based on the above results and parameters; determining the vibration parameters based on the state judgment result to control the vibration deicing module unit to vibrate and deice the switch; after the vibration deicing, the control unit detects the residual icing state to determine the opening and closing force parameter, and uses the opening and closing force parameter to control the force adjusting unit to perform the opening and closing action of the switch. The application improves the switch action reliability and operation stability in the ice melting process, and guarantees the efficient execution of the power distribution network ice melting.

Description

Technical Field

[0001] This invention relates to the field of power grid de-icing technology, and in particular to a method, system, equipment and medium for de-icing power distribution line switches. Background Technology

[0002] As the final link in the power system that transmits electricity to users, the safe and stable operation of distribution lines is directly related to the power supply guarantee for social production and residents' lives. Among them, the distribution line switches, as key equipment for line segmentation, connection and fault isolation, are particularly prone to icing problems. Icing not only increases the operating resistance of the switches, but may also lead to failure of opening and closing actions, seriously affecting the smooth progress of de-icing operations and the flexible dispatch of the power grid.

[0003] Currently, most existing methods for de-icing switches rely on manual operation from heights. This involves manually operating the switch with an insulated rod while the circuit is energized, relying on visual judgment to determine the switch's opening and closing positions. This is not only time-consuming and labor-intensive but also poses safety hazards such as electric shock and falls from heights, with risks further exacerbated in severe icy and snowy weather. Furthermore, when the ice layer on the switch is thick, problems such as malfunctioning opening or incomplete closing can easily occur; forced operation can damage the switch mechanism. Traditional methods require manual knocking to remove ice, resulting in low automation and high operational difficulty. Moreover, traditional methods cannot accurately sense the ice layer status of the switch itself, lacking quantifiable and remotely transmittable digital monitoring information, making it difficult to integrate into the remote monitoring system of the smart grid and achieve unattended operation and remote intelligent control. Summary of the Invention

[0004] In view of the aforementioned existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a method, system, device and medium for de-icing of power distribution line switches, which solves the problems of poor reliability of switching operations, low de-icing efficiency and easy damage to equipment caused by the lack of accurate perception and adaptive adjustment capability of the icing state in the existing power distribution line switch de-icing technology.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: In a first aspect, the present invention provides a method for de-icing a power distribution line switch, comprising: In response to the need for de-icing of power distribution line switches, the icing parameters of the power distribution line switches are collected and transmitted to the control unit for preprocessing. Based on the preprocessed icing parameters, icing derivative parameters are determined. Based on the pre-processed icing parameters, a preliminary judgment is made on the icing status of the power distribution line switches to obtain a preliminary judgment result; Based on the preliminary judgment results, icing-derived parameters, and pre-processed icing parameters, a comprehensive icing index analysis is performed to obtain the target comprehensive icing index. Then, a precise state determination of the icing status of the power distribution line switch is performed to obtain the state determination result. Based on the state determination result, the vibration parameters are determined, and based on the vibration parameters, the vibration de-icing module unit is controlled to perform vibration de-icing on the power distribution line switch. The control unit detects the remaining icing status of the power distribution line switch, determines the opening and closing force parameter based on the remaining icing status, and uses the opening and closing force parameter to control the force adjustment unit to perform the opening and closing action of the power distribution line switch.

[0007] As a preferred embodiment of the de-icing method for power distribution line switches according to the present invention, the step of transmitting the icing parameters to the control unit for preprocessing, and determining icing-derived parameters based on the preprocessed icing parameters, includes: The icing parameters are cleaned and filtered to obtain pre-processed icing parameters. Based on the preprocessed icing parameters, extract the icing thickness and time difference at consecutive time points, and calculate the icing thickness difference; The icing rate is calculated based on the difference in icing thickness and the time difference, and the icing-derived parameters are determined based on the icing rate.

[0008] As a preferred embodiment of the de-icing method for power distribution line switches described in this invention, the step of obtaining the preliminary judgment result includes: Based on the preprocessed icing parameters, the icing thickness is extracted, and the icing thickness is compared with a preset thickness threshold to obtain the comparison result; Based on the comparison results, a preliminary judgment is made on the icing status of the power distribution line switches, and a preliminary judgment result is obtained.

[0009] As a preferred embodiment of the de-icing method for power distribution line switches described in this invention, the step of obtaining the state determination result includes: Based on the preliminary judgment results, icing-derived parameters, and pre-processed icing parameters, temperature information, humidity information, icing thickness, and icing hardness are extracted; Determine the extreme cold threshold, and determine the temperature and humidity influence function based on the extreme cold threshold, temperature information, and humidity information; A first normalized reference value for icing thickness, a second normalized reference value for icing rate, and a third normalized reference value for icing hardness are determined. Based on the temperature and humidity influence function, icing thickness, icing hardness, icing rate, first normalized reference value, second normalized reference value, and third normalized reference value, a target comprehensive icing index is determined. The target comprehensive icing index is compared with a preset index threshold, and the comparison result is used to accurately determine the icing status of the power distribution line switch, thereby obtaining the status determination result.

[0010] As a preferred embodiment of the de-icing method for power distribution line switches described in this invention, the step of determining vibration parameters based on the state determination result includes: Obtain the mapping relationship between icing state and vibration frequency and vibration amplitude; Based on the mapping relationship, the corresponding target vibration frequency and target vibration amplitude are determined using the state determination result, and vibration parameters are determined based on the target vibration frequency and target vibration amplitude.

[0011] In a preferred embodiment of the de-icing method for a power distribution line switch according to the present invention, the control unit detects the remaining icing state of the power distribution line switch and determines the opening / closing force parameter based on the remaining icing state, including: After the power distribution line switch is de-iced by vibration, the control unit detects the remaining icing status of the power distribution line switch, wherein the remaining icing status is determined by re-collecting icing parameters and performing icing index analysis of the icing status. Based on the remaining icing state, a preset mapping table is used to determine the opening and closing force threshold, and the opening and closing force parameter is determined based on the opening and closing force threshold.

[0012] In a preferred embodiment of the de-icing method for power distribution line switches described in this invention, the step of controlling the opening and closing action of the power distribution line switch using the opening and closing force parameter includes: During the process of the actuator opening and closing the power distribution line switch, the force detection module of the force adjustment unit detects the real-time force of the opening and closing action and calculates the difference between the real-time force and the opening and closing force parameter. Based on the difference, the feedback control voltage value is determined using a proportional-integral-derivative control algorithm. The driving voltage value is determined based on the feedback control voltage value, and the driving adjustment module is controlled based on the driving voltage value to adjust the opening and closing action of the power distribution line switch.

[0013] In a second aspect, the present invention provides an ice-melting system for power distribution line switches, comprising: The data processing module is used to collect the icing parameters of the power distribution line switch in response to the need for de-icing of the power distribution line switch, and transmit the icing parameters to the control unit for preprocessing, and determine the icing derivative parameters based on the preprocessed icing parameters; The first judgment module is used to make a preliminary judgment on the icing status of the power distribution line switch based on the preprocessed icing parameters, and obtain a preliminary judgment result; The second judgment module is used to perform a comprehensive icing index analysis based on the preliminary judgment result, icing-derived parameters and pre-processed icing parameters, obtain the target comprehensive icing index, and then perform a precise state determination of the icing status of the power distribution line switch to obtain the state determination result. The vibration processing module is used to determine vibration parameters based on the state determination result, and control the vibration de-icing module unit to perform vibration de-icing processing on the power distribution line switch based on the vibration parameters. The force adjustment module is used by the control unit to detect the remaining icing status of the power distribution line switch, determine the opening and closing force parameters based on the remaining icing status, and use the opening and closing force parameters to control the force adjustment unit to perform the opening and closing action of the power distribution line switch.

[0014] Thirdly, the present invention provides an electronic device, including a memory and a processor; the memory is used to store computer-executable instructions, and the processor, when executing the computer-executable instructions, implements the steps of a de-icing method for a power distribution line switch.

[0015] Fourthly, the present invention provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement the steps of a de-icing method for a power distribution line switch.

[0016] Compared with existing technologies, the beneficial effects of this invention are as follows: In response to the need for de-icing of power distribution line switches, the icing parameters of the power distribution line switches are collected by the icing monitoring unit and transmitted to the control unit. This avoids excessive reliance on manual operation, solves the problems of lagging and data disconnection in existing switch icing monitoring, and provides reliable data support for subsequent control actions. The control unit preprocesses the icing parameters and determines icing-derived parameters based on the preprocessed parameters. A preliminary judgment of the icing state of the power distribution line switches is made based on the preprocessed icing parameters. A comprehensive icing index analysis is performed based on the preliminary judgment results, icing-derived parameters, and preprocessed icing parameters. A precise state determination of the icing state of the power distribution line switches is made based on the target comprehensive icing index. This comprehensive multi-source information effectively suppresses single parameter deviations and significantly improves the accuracy and robustness of icing determination. Vibration parameters are determined based on the precise state determination results. The vibration de-icing module unit is controlled based on the vibration parameters to perform vibration de-icing treatment on the power distribution line switches, solving the problem of icing on key parts of the switches, greatly improving de-icing efficiency, and preventing residual icing from affecting the normal operation of the switches. After the power distribution line switch is de-iced by vibration, the control unit detects the remaining ice condition of the switch and determines the opening and closing force parameters based on the remaining ice condition. The opening and closing force parameters are used to control the force adjustment unit to open and close the power distribution line switch. This avoids incomplete opening and closing caused by insufficient force when the ice is thick, and also prevents contact wear and line impact caused by excessive force when the ice is thin. This extends the service life of the switch and improves the stability of the switch operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall process logic of a de-icing method for a power distribution line switch provided in an embodiment of the present invention.

[0019] Figure 2 This is a flowchart illustrating the preliminary judgment and status determination of a de-icing method for a power distribution line switch, provided as an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram showing the location of a power distribution line switch in a de-icing method for power distribution line switches according to an embodiment of the present invention. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] Example 1, referring to Figure 1 As one embodiment of the present invention, a method for de-icing a power distribution line switch is provided, such as... Figure 1 The specific steps shown are as follows: S100: In response to the need for de-icing of the power distribution line switch, the icing parameters of the power distribution line switch are collected and transmitted to the control unit for preprocessing. Based on the preprocessed icing parameters, the derived icing parameters are determined. S200: Based on the pre-processed icing parameters, make a preliminary judgment on the icing status of the power distribution line switch and obtain a preliminary judgment result; S300: Based on the preliminary judgment results, icing-derived parameters and pre-processed icing parameters, a comprehensive icing index analysis is performed to obtain the target comprehensive icing index. Then, the precise state determination of the icing status of the distribution line switch is performed to obtain the state determination result. S400: Determine vibration parameters based on the state determination results, and control the vibration de-icing module unit to perform vibration de-icing treatment on the power distribution line switch based on the vibration parameters; S500: The control unit detects the remaining icing status of the power distribution line switch, determines the opening and closing force parameters based on the remaining icing status, and uses the opening and closing force parameters to control the force adjustment unit to perform the opening and closing actions of the power distribution line switch.

[0023] It should be noted that, in response to the need for de-icing of power distribution line switches, the icing monitoring unit collects icing parameters of the power distribution line switches and transmits these parameters to the control unit. This avoids excessive reliance on manual operation and solves the problems of lagging and data disconnection in existing switch icing monitoring, providing reliable data support for subsequent control actions. The control unit preprocesses the icing parameters and determines icing-derived parameters based on the preprocessed parameters. A preliminary judgment of the icing status of the power distribution line switches is then made based on the preprocessed parameters. A comprehensive icing index analysis is performed based on the preliminary judgment results, icing-derived parameters, and preprocessed icing parameters. A precise state determination of the icing status of the power distribution line switches is then made based on the target comprehensive icing index. This comprehensive multi-source information effectively suppresses single-parameter deviations and significantly improves the accuracy and robustness of icing determination. Vibration parameters are determined based on the precise state determination results. Based on these vibration parameters, the vibration de-icing module unit is controlled to perform vibration de-icing treatment on the power distribution line switches, solving the problem of icing on critical parts of the switches, greatly improving de-icing efficiency, and preventing residual icing from affecting the normal operation of the switches. After the power distribution line switch is de-iced by vibration, the control unit detects the remaining ice condition of the switch and determines the opening and closing force parameters based on the remaining ice condition. The opening and closing force parameters are used to control the force adjustment unit to open and close the power distribution line switch. This avoids incomplete opening and closing caused by insufficient force when the ice is thick, and also prevents contact wear and line impact caused by excessive force when the ice is thin. This extends the service life of the switch and improves the stability of the switch operation.

[0024] Example 2, refer to Figure 2 Based on the previous embodiment, this embodiment provides a specific implementation method for de-icing a power distribution line switch.

[0025] In this embodiment of the invention, step S100, in response to the need for de-icing of the power distribution line switch, collects the icing parameters of the power distribution line switch and transmits the icing parameters to the control unit for preprocessing, and determines the icing-derived parameters based on the preprocessed icing parameters; specifically including the following sub-steps A1 to A4: In A1: In response to the need for de-icing of the power distribution line switch, collect the icing parameters of the power distribution line switch; Specifically, by combining micro-meteorological monitoring devices and conductor status monitoring devices, and through comprehensive analysis via edge computing gateways, in response to situations where the ambient temperature is below a preset threshold, the humidity is above a preset threshold, and the line tension exceeds a preset threshold or the image recognition algorithm detects that the ice thickness exceeds the design value, it is determined that the power distribution line switch needs to be de-iced.

[0026] It should be noted that the above thresholds and design values ​​can be flexibly set based on historical micro-meteorological data of the area where the line is located, the mechanical characteristics of the conductor, and the power grid operation procedures. Preferably, the preset threshold for ambient temperature can be 0℃ (or -5℃ for high-altitude and cold regions), and the preset threshold for relative humidity can be 85%RH; the preset threshold for line tension is determined based on 70% of the rated tension of the conductor; the design value for icing thickness is usually taken as the design ice thickness value of the line, generally 10mm to 20mm (typically 10mm).

[0027] It should also be noted that the above values ​​are not unique and fixed. In practical applications, they can be dynamically adjusted by combining edge computing gateways with real-time monitoring data to balance the timeliness of ice melting initiation with the avoidance of erroneous actions.

[0028] Specifically, the icing monitoring unit collects icing parameters of the power distribution line switches and transmits these parameters to the control unit via a communication unit. The icing monitoring unit uses a combination of temperature and humidity sensors and capacitive icing sensors. The icing parameters include temperature, humidity, icing thickness, and icing hardness.

[0029] In A2: the icing parameters are cleaned, and the cleaned icing parameters are filtered to obtain pre-processed icing parameters; Specifically, the control unit receives icing parameters, performs data cleaning processing on these parameters to obtain cleaned icing parameters. The data cleaning process removes abnormal characters and garbled text from the icing parameters. The cleaned icing parameters are then filtered to obtain pre-processed icing parameters. Moving average or low-pass filtering can be applied to the cleaned icing parameters to eliminate transient noise interference.

[0030] In A3: Based on the preprocessed icing parameters, extract the icing thickness and time difference at consecutive time points, and calculate the icing thickness difference; Specifically, based on the preprocessed icing parameters, the icing thickness and time difference at consecutive time points are extracted. Consecutive time points are adjacent time points, and the icing thickness difference is calculated based on the icing thickness at consecutive time points, that is, the difference in icing thickness between adjacent time points is calculated.

[0031] In A4: the icing rate is calculated based on the difference in icing thickness and the time difference, and the icing-derived parameters are determined based on the icing rate.

[0032] Specifically, the icing rate is used as a derived parameter, and its expression is: Where V is the icing rate. Due to differences in ice thickness, For time difference.

[0033] It should be noted that in the above step S100, the ice coating monitoring function is directly integrated into the distribution line switch body, eliminating the need to deploy external independent monitoring equipment, realizing real-time and accurate collection of the ice coating parameters of the switch itself, and fundamentally solving the problems of delayed ice coating state monitoring and disconnection between data and the switch body in the traditional manner. At the same time, the control unit sequentially performs data cleaning and filtering processing on the collected original ice coating parameters, effectively eliminating environmental noise and abnormal jump values, and significantly improving data quality; the ice coating rate is calculated by extracting the ice coating thickness difference and time difference at consecutive time points, expanding static parameters into dynamic derived indicators, ensuring that the data on which control decisions are based are accurate, credible, timely and effective.

[0034] In the embodiment of the present invention, the above step S200 performs a preliminary judgment on the ice coating state of the distribution line switch based on the preprocessed ice coating parameters to obtain a preliminary judgment result; which specifically includes the following sub-steps B1 and B2: In B1: extract the ice coating thickness based on the preprocessed ice coating parameters, compare the ice coating thickness with a preset thickness threshold, and obtain a comparison result; In B2: perform a preliminary judgment on the ice coating state of the distribution line switch based on the comparison result to obtain a preliminary judgment result; Specifically, the preset thickness threshold includes two levels, which are respectively a first thickness threshold T1 and a second thickness threshold T2. Preferably, T1 is 2mm, and T2 is 15mm.

[0035] Specifically, as shown in Figure 2 , when the ice coating thickness is less than 2mm, the ice layer is extremely thin or only a frost layer, and its influence on the mechanical resistance and electrical performance of the switch operating mechanism is negligible, which can be directly determined as an ice-free state without starting the ice melting process; when the ice coating thickness is greater than or equal to 15mm, the ice layer is thick enough to cause severe mechanical load and action jamming risk to the switch body, which needs to be directly determined as severe ice coating and trigger the highest level of ice melting treatment.

[0036] Specifically, if T1 ≤ ice coating thickness < T2, a precise state judgment is entered to distinguish mild ice coating and moderate ice coating.

[0037] It should be noted that the specific values of T1 and T2 are not uniquely fixed, and can be adaptively adjusted according to the switch equipment model, the rated torque of the operating mechanism, the micrometeorological characteristics of the area where the line is located, and the power grid operation regulations. For example, T2 can be adjusted to 12mm in a light ice area, and T2 can be increased to 20mm in a heavy ice area, so as to balance the timeliness of ice melting start and the rationality of strategy classification.

[0038] It should be noted that step S200 above can complete the initial identification of icing anomalies in a very short time. It can quickly filter out a large number of lightly iced or normal operating conditions without initiating complex calculations, allowing the system's computing resources to focus on the icing states that truly require attention. This avoids the resource waste associated with detailed analysis throughout the entire process. The pre-screening strategy effectively improves the response speed and operational efficiency of the overall de-icing control process, providing an efficient trigger for subsequent accurate judgment and de-icing decisions.

[0039] In this embodiment of the invention, step S300 performs a comprehensive icing index analysis based on the preliminary judgment result, icing-derived parameters, and pre-processed icing parameters. After obtaining the target comprehensive icing index, it performs a precise state determination of the icing status of the power distribution line switch to obtain the state determination result. This includes the following sub-steps C1 to C4: In C1: Based on the preliminary judgment results, icing-derived parameters, and pre-processed icing parameters, temperature information, humidity information, icing thickness, and icing hardness are extracted; In C2: Determine the extreme cold threshold, and determine the temperature and humidity influence function based on the extreme cold threshold, temperature information, and humidity information; Specifically, the expression for the temperature and humidity influence function is: in, Let be the temperature and humidity effect function, k be the normalization coefficient, H be the humidity information, and T be the temperature information. This is the extreme cold threshold.

[0040] It should be noted that, This is the minimum temperature threshold for ice formation (usually -10℃ or -15℃; below this temperature, the air is dry and it is not easy to form highly adhesive wet ice). Normalization coefficients (e.g.) , making The maximum value is 1). The risk of forming highly adhesive wet ice or rime only exists when the temperature is below freezing (0°C) but above the extreme cold threshold. At this time, humidity... The higher the temperature, the greater the water vapor content in the air, the faster and denser the icing grows, and the higher the risk of hardness / adhesion.

[0041] In C3: Determine the first normalized reference value for icing thickness, the second normalized reference value for icing rate, and the third normalized reference value for icing hardness. Based on the temperature and humidity influence function, icing thickness, icing hardness, icing rate, the first normalized reference value, the second normalized reference value, and the third normalized reference value, determine the target comprehensive icing index. Specifically, the expression for the target comprehensive icing index is: Where I is the target comprehensive icing index, and α, β, γ, and δ are all weighting coefficients. Let temperature and humidity be the influence function. S is the ice thickness, S is the ice hardness, and V is the icing rate. As the first normalized baseline value, This is the second normalized baseline value. This is the third normalized baseline value. Typically, the thickness of the ice layer The one with the highest weight.

[0042] In C4: The target comprehensive icing index is compared with the preset index threshold, and the comparison result is used to make an accurate determination of the icing status of the power distribution line switch, and obtain the status determination result. Specifically, in this embodiment, the preset index threshold includes two levels, namely the first index threshold I1 and the second index threshold I2. Preferably, I1 is 0.3 and I2 is 0.7.

[0043] Specifically, such as Figure 2 As shown, when the target comprehensive icing index I < 0.3, it indicates that although the ice layer has a certain thickness, the icing rate is slow, the hardness is low, or the environmental temperature and humidity conditions are not yet severe, and it is judged as light icing; when 0.3 ≤ I < 0.7, it is judged as moderate icing, and moderate-intensity de-icing measures are required; when I ≥ 0.7, even if the icing thickness has not reached the severe thickness threshold T2, the risk is extremely high after considering the comprehensive influence of temperature and humidity, icing rate and hardness, and it is judged as severe icing, triggering the strongest level of de-icing treatment.

[0044] It should be noted that the specific values ​​of I1 and I2 are not unique and fixed. They can be adaptively adjusted according to the dynamic distribution range of icing parameters and the tolerance of switching equipment in actual working conditions. For example, in areas with severe micro-meteorological fluctuations, the threshold can be appropriately reduced to improve the sensitivity of the early warning, while in scenarios with sufficient equipment margin, the threshold can be moderately increased to avoid over-response.

[0045] It should be noted that step S300, based on the preliminary judgment, integrates multi-dimensional feature parameters, introduces an extreme cold threshold to determine the temperature and humidity influence function, and constructs a comprehensive icing index through multi-benchmark value normalization. This achieves a precise quantitative assessment of the icing status of power distribution line switches, effectively suppressing misjudgments or omissions caused by deviations in a single parameter under extreme conditions, significantly enhancing the accuracy and robustness of icing status determination. Furthermore, the accurate icing status determination results ensure that de-icing measures can be precisely matched to the actual degree of icing and implemented as needed.

[0046] In this embodiment of the invention, step S400 determines the vibration parameters based on the state determination result, and controls the vibration de-icing module unit to perform vibration de-icing treatment on the power distribution line switch based on the vibration parameters; it includes the following sub-steps D1 to D3 in detail: In D1: Obtain the mapping relationship between the icing state and the vibration frequency and vibration amplitude; It should be noted that the mapping relationship between the icing state and the vibration frequency and amplitude has been preset by relevant personnel.

[0047] In D2: Based on the mapping relationship, the corresponding target vibration frequency and target vibration amplitude are determined using the state determination results, and the vibration parameters are determined based on the target vibration frequency and target vibration amplitude; Specifically, when the condition assessment result is light icing, a low vibration frequency (e.g., 20~50Hz) and a small vibration amplitude (e.g., 0.1~0.3mm) should be used; when the condition assessment result is moderate icing, a medium-high vibration frequency (e.g., 50~100Hz) and a medium-large vibration amplitude (e.g., 0.3~0.8mm) should be used; when the condition assessment result is heavy icing, a high vibration frequency (e.g., 100~200Hz or higher) and a large vibration amplitude (e.g., 0.8~1.5mm, within the safety limits of the mechanism) should be used.

[0048] In D3: The vibration de-icing module unit is controlled based on vibration parameters to perform vibration de-icing on the power distribution line switches; Specifically, for light icing, low-frequency, small-amplitude vibration is used to avoid excessive vibration affecting the stability of the switch; for moderate and heavy icing, high-frequency, large-amplitude vibration is used to enhance the ice removal effect. The vibration de-icing module unit is activated to remove some of the ice through vibration. Then, the switching force is adjusted according to the remaining ice condition to achieve a coordinated mode of vibration de-icing and force matching, thereby improving the de-icing efficiency and preventing residual ice from causing jamming.

[0049] It should be noted that step S400 adaptively determines the optimal vibration parameters through the mapping relationship between the icing state and the vibration frequency and amplitude, and drives the vibration de-icing module unit to perform targeted high-frequency vibration de-icing on the switch. Compared with traditional fixed parameters or manual tapping de-icing methods, this method can dynamically adjust the output energy according to the severity of icing—using strong vibration for efficient de-icing in cases of severe icing, and using weak vibration to avoid excessive impact in cases of slight icing. This significantly improves the de-icing efficiency, effectively solves the problem of icing and jamming in key parts of the switch, and avoids unnecessary mechanical damage to the switch body and insulating components, achieving a balance between de-icing effect and equipment safety.

[0050] In the embodiment of the present invention, in step S500 above, the control unit detects the residual ice coating state of the distribution line switch, determines the opening and closing force parameter based on the residual ice coating state, and uses the opening and closing force parameter to control the force adjustment unit to perform the opening and closing action of the distribution line switch; which specifically includes the following sub-steps E1 to E5: In E1: after the vibration de-icing treatment is performed on the distribution line switch, the control unit detects the residual ice coating state of the distribution line switch, wherein the residual ice coating state is determined by re-collecting ice coating parameters and performing ice coating index analysis on the ice coating state; In E2: the opening and closing force threshold is determined using a preset mapping relationship table based on the residual ice coating state, and the opening and closing force parameter is determined based on the opening and closing force threshold; Specifically, the preset mapping relationship table includes the relationship between the ice coating state and the opening and closing force threshold. Assume that the maximum opening and closing force for opening and closing operation is Fmax, and the to-be-set opening and closing force is Ftarget. In the case of light ice coating, the opening and closing force threshold is set to 0.3Fmax, that is, 0<Ftarget≤0.3Fmax; in the case of moderate ice coating, the opening and closing force threshold is set to 0.6Fmax, that is, 0.3Fmax<Ftarget≤0.6Fmax; in the case of heavy ice coating, the opening and closing force threshold is set to Fmax, that is, 0.6Fmax<Ftarget≤Fmax.

[0051] In E3: the opening and closing force parameter is used to control the force adjustment unit to perform the opening and closing action of the distribution line switch; Specifically, when it is detected that there is no ice coating on the switch, the opening and closing operation is performed with conventional force to avoid excessive wear of the contacts; when light ice coating is detected, the force is moderately increased to ensure that the opening and closing operation is in place while avoiding excessive force; when moderate or heavy ice coating is detected, the force is further increased to overcome the ice coating resistance and ensure smooth action of the switch, and at the same time, the force adjustment range is controlled within a preset safety range to prevent excessive force from damaging the switch mechanism and the line.

[0052] In E4: during the process that the actuator performs the opening and closing action of the distribution line switch, the force detection module of the force adjustment unit detects the real-time force of the opening and closing action, and calculates the difference between the real-time force and the opening and closing force parameter; Specifically, during the process that the actuator performs the opening and closing action of the distribution line switch, the force detection module of the force adjustment unit collects the actual force signal output by the actuator in real time, sends it to the control unit after signal conditioning and analog-to-digital conversion, and the control unit compares the real-time detected actual force value with the opening and closing force parameter, and calculates the difference between the two.

[0053] It should be noted that the difference reflects the deviation between the actual output torque and the target required torque. If the difference is positive, it indicates that the actual force exceeds the target value, and there is a risk of damaging the equipment due to excessive force. If the difference is negative, it indicates that the actual force is insufficient and may not be able to overcome the icing resistance to complete the reliable opening and closing of the circuit breaker.

[0054] In E5: Based on the difference, the proportional-integral-derivative control algorithm is used to determine the feedback control voltage value, the drive voltage value is determined based on the feedback control voltage value, and the drive regulation module is controlled to adjust the opening and closing action of the power distribution line switch based on the drive voltage value; Specifically, the expression for the feedback control voltage value is: in, For feedback control voltage value, This is the proportionality coefficient. The integral coefficient is... These are the differential coefficients. The difference. The sampling time interval, Determine the strength of the response to the current error; Determines the ability to eliminate historical accumulated errors; It determines the prediction and damping effect of future error trends.

[0055] Specifically, the expression for the driving voltage value is: in, This is the driving voltage value, which is the voltage value at which the control unit drives the switch. For feedback control voltage value, The initial voltage value for driving the switch is obtained based on the lookup table method.

[0056] Specifically, the drive adjustment module, based on the drive voltage value, regulates the opening and closing actions of the power distribution line switch. The control unit typically controls the switch opening and closing force using voltage-driven methods; the higher the output voltage, the greater the force. The proportional-integral-derivative (PI-DE) control algorithm adjusts the drive voltage value in real time based on the error between the actual force and the target force, ensuring that the actual force continuously approaches the target force. This guarantees that the actual force quickly, smoothly, and accurately tracks the target force during the switch opening and closing process, effectively addressing nonlinear load changes caused by icing. Real-time voltage correction forms a closed-loop regulation of the opening and closing force, ensuring the accuracy and stability of the force adjustment and adapting to the needs of different icing scenarios.

[0057] Specifically, by cooperating with the control unit and icing detection unit, periodic icing and de-icing can be performed during periods of severe icing. For example, in cold, high-altitude regions during winter, the control unit can be set to detect icing every 12 hours. Every 12 hours, the icing detection unit assesses the switch's icing status (no icing, light icing, moderate icing, heavy icing). When de-icing is required (> light icing), the vibration de-icing module is activated. This ensures the switch is always in normal working order, avoiding excessively long preparation times for de-icing.

[0058] It should be noted that in step S500 above, after vibration de-icing is completed, the control unit detects the remaining icing status of the switch again, determines the opening and closing force threshold based on a preset mapping table, generates opening and closing force parameters, and controls the actuator to complete the switch action. Simultaneously, it performs closed-loop adjustment on the real-time force deviation fed back by the force detection module, dynamically correcting the drive voltage value to achieve precise closed-loop control of the opening and closing force. When the icing is thick, it ensures sufficient driving force to complete reliable opening and closing; when the icing is thin, it actively limits the force to prevent contact wear and line impact, effectively extending the switch's service life and significantly improving the success rate of switch action and the reliability of power supply under icing conditions.

[0059] Example 3, referring to Figure 3 This embodiment provides an ice-melting system for power distribution line switches, comprising: The data processing module is used to collect the icing parameters of the power distribution line switch in response to the need for de-icing, and transmit the icing parameters to the control unit for preprocessing, and determine the icing derivative parameters based on the preprocessed icing parameters; The first judgment module is used to make a preliminary judgment on the icing status of the power distribution line switch based on the pre-processed icing parameters and obtain a preliminary judgment result. The second judgment module is used to perform comprehensive icing index analysis based on the preliminary judgment results, icing-derived parameters and pre-processed icing parameters, obtain the target comprehensive icing index, and then make an accurate state judgment on the icing status of the power distribution line switch to obtain the state judgment result. The vibration processing module is used to determine vibration parameters based on the state judgment result, and control the vibration de-icing module unit to perform vibration de-icing processing on the power distribution line switch based on the vibration parameters. The force adjustment module is used to control the control unit to detect the remaining icing status of the power distribution line switch, determine the opening and closing force parameters based on the remaining icing status, and use the opening and closing force parameters to control the force adjustment unit to perform the opening and closing actions of the power distribution line switch.

[0060] Specifically, the de-icing system includes an ice monitoring unit, a control unit, a vibration de-icing module unit, a force adjustment unit, and a communication unit. The control unit is connected to the ice monitoring unit, the vibration de-icing module unit, the force adjustment unit, and the communication unit, respectively.

[0061] Specifically, the icing monitoring unit uses a combination of temperature and humidity sensors and capacitive icing sensors. The temperature and humidity sensors collect real-time data on the switch surface temperature and humidity, while the capacitive icing sensors collect real-time data on the thickness and hardness of the ice on the switch surface. The data from the two sensors complement each other, ensuring the accuracy of icing monitoring. The power distribution line switches include boundary switches, de-icing switches, and short-circuit switches. The switch installation locations are as follows... Figure 3 As shown.

[0062] Specifically, the control unit analyzes the icing status by receiving data transmitted from the icing monitoring unit, and sends relevant command information to the vibration de-icing module unit and the force adjustment unit based on the analyzed icing status.

[0063] Specifically, the vibration de-icing module unit includes a vibration generator, a vibration transmission mechanism, and a vibration drive module. The vibration generator uses a miniature high-frequency vibration motor, and the vibration transmission mechanism is connected to the switch contacts and the housing to ensure that the vibration energy can be effectively transmitted to all iced parts of the switch. The vibration drive module is used for vibration de-icing. The vibration de-icing module unit works in conjunction with the ice monitoring unit and the force adjustment unit. When the control unit receives a switch opening and closing operation, it first determines that the switch is iced, then starts the vibration de-icing module unit to remove some of the ice through vibration. Then, it adjusts the switch opening and closing force according to the remaining ice, realizing a coordinated mode of vibration de-icing + force adaptation, improving the ice melting efficiency and avoiding residual ice from causing jamming.

[0064] Specifically, the force adjustment unit is connected to the switch's drive mechanism and includes a force detection module, a drive adjustment module, and an actuator. The force detection module collects the actual force applied when the switch opens and closes in real time. The drive adjustment module receives control signals from the control unit and adjusts the output force of the actuator to achieve stepless adjustment of the opening and closing force. The force detection module feeds back the actual force applied when the switch opens and closes to the control unit in real time. The control unit compares the actual force with a preset threshold and performs real-time correction on the force adjustment module, forming a closed-loop adjustment of the opening and closing force to ensure the accuracy and stability of the force adjustment and adapt to the needs of different icing scenarios.

[0065] Specifically, the communication unit includes wired (485, Ethernet) and wireless (4G / 5G) communication, which is used to receive remote opening and closing operation commands and transmit the switch status, icing information, and operation results back to the host computer controller or distribution network dispatching system in real time.

[0066] It should be noted that the technical solution of the de-icing system for power distribution line switches is based on the same concept as the technical solution of the de-icing method for power distribution line switches described above. For details not described in detail in the technical solution of the de-icing system for power distribution line switches in this embodiment, please refer to the description of the technical solution of the de-icing method for power distribution line switches described above.

[0067] The above-mentioned unit modules can be embedded in the processor of the electronic device in hardware form or independent of it, or they can be stored in the memory of the electronic device in software form, so that the processor can call and execute the corresponding operations of the above modules.

[0068] This embodiment also provides an electronic device, which includes a processor, a memory, a communication interface, a display screen, and an input device connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through WiFi, carrier networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for de-icing power distribution line switches. The display screen can be a liquid crystal display (LCD) or an e-ink display. The input device can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the device's casing, or an external keyboard, touchpad, or mouse.

[0069] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method proposed in the above embodiments.

[0070] The storage medium proposed in this embodiment belongs to the same inventive concept as the method proposed in the above embodiments. Technical details not described in detail in this embodiment can be found in the above embodiments, and this embodiment has the same beneficial effects as the above embodiments.

[0071] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory, random access memory, flash memory, hard disk, or optical disk, and includes several instructions to cause an electronic device (which may be a personal computer, server, or network device, etc.) to execute the method of the embodiments of the present invention.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the present invention.

Claims

1. A method for de-icing switches in power distribution lines, characterized in that, include: In response to the need for de-icing of power distribution line switches, the icing parameters of the power distribution line switches are collected and transmitted to the control unit for preprocessing. Based on the preprocessed icing parameters, icing derivative parameters are determined. Based on the pre-processed icing parameters, a preliminary judgment is made on the icing status of the power distribution line switches to obtain a preliminary judgment result; Based on the preliminary judgment results, icing-derived parameters, and pre-processed icing parameters, a comprehensive icing index analysis is performed to obtain the target comprehensive icing index. Then, a precise state determination of the icing status of the power distribution line switch is performed to obtain the state determination result. Based on the state determination result, the vibration parameters are determined, and based on the vibration parameters, the vibration de-icing module unit is controlled to perform vibration de-icing on the power distribution line switch. The control unit detects the remaining icing status of the power distribution line switch, determines the opening and closing force parameter based on the remaining icing status, and uses the opening and closing force parameter to control the force adjustment unit to perform the opening and closing action of the power distribution line switch.

2. The de-icing method for power distribution line switches as described in claim 1, characterized in that, The step of transmitting the icing parameters to the control unit for preprocessing and determining icing-derived parameters based on the preprocessed icing parameters includes: The icing parameters are cleaned and filtered to obtain pre-processed icing parameters. Based on the preprocessed icing parameters, extract the icing thickness and time difference at consecutive time points, and calculate the icing thickness difference; The icing rate is calculated based on the difference in icing thickness and the time difference, and the icing-derived parameters are determined based on the icing rate.

3. The de-icing method for power distribution line switches as described in claim 2, characterized in that, The process of obtaining the preliminary judgment result includes: Based on the preprocessed icing parameters, the icing thickness is extracted, and the icing thickness is compared with a preset thickness threshold to obtain the comparison result; Based on the comparison results, a preliminary judgment is made on the icing status of the power distribution line switches, and a preliminary judgment result is obtained.

4. The de-icing method for power distribution line switches as described in claim 3, characterized in that, The obtained state determination result includes: Based on the preliminary judgment results, icing-derived parameters, and pre-processed icing parameters, temperature information, humidity information, icing thickness, and icing hardness are extracted; Determine the extreme cold threshold, and determine the temperature and humidity influence function based on the extreme cold threshold, temperature information, and humidity information; A first normalized reference value for icing thickness, a second normalized reference value for icing rate, and a third normalized reference value for icing hardness are determined. Based on the temperature and humidity influence function, icing thickness, icing hardness, icing rate, first normalized reference value, second normalized reference value, and third normalized reference value, a target comprehensive icing index is determined. The target comprehensive icing index is compared with a preset index threshold, and the comparison result is used to accurately determine the icing status of the power distribution line switch, thereby obtaining the status determination result.

5. The de-icing method for a power distribution line switch as described in claim 4, characterized in that, The determination of vibration parameters based on the state determination result includes: Obtain the mapping relationship between icing state and vibration frequency and vibration amplitude; Based on the mapping relationship, the corresponding target vibration frequency and target vibration amplitude are determined using the state determination result, and vibration parameters are determined based on the target vibration frequency and target vibration amplitude.

6. The de-icing method for a power distribution line switch as described in claim 5, characterized in that, The control unit detects the remaining icing status of the power distribution line switch and determines the opening / closing force parameters based on the remaining icing status, including: After the power distribution line switch is de-iced by vibration, the control unit detects the remaining icing status of the power distribution line switch, wherein the remaining icing status is determined by re-collecting icing parameters and performing icing index analysis of the icing status. Based on the remaining icing state, a preset mapping table is used to determine the opening and closing force threshold, and the opening and closing force parameter is determined based on the opening and closing force threshold.

7. The de-icing method for a power distribution line switch as described in claim 6, characterized in that, The method of controlling the opening and closing action of the power distribution line switch using the opening and closing force parameter includes: During the process of the actuator opening and closing the power distribution line switch, the force detection module of the force adjustment unit detects the real-time force of the opening and closing action and calculates the difference between the real-time force and the opening and closing force parameter. Based on the difference, the feedback control voltage value is determined using a proportional-integral-derivative control algorithm. The driving voltage value is determined based on the feedback control voltage value, and the driving adjustment module is controlled based on the driving voltage value to adjust the opening and closing action of the power distribution line switch.

8. A de-icing system for power distribution line switches, implementing the de-icing method for power distribution line switches as described in any one of claims 1 to 7, characterized in that, include: The data processing module is used to collect the icing parameters of the power distribution line switch in response to the need for de-icing of the power distribution line switch, and transmit the icing parameters to the control unit for preprocessing, and determine the icing derivative parameters based on the preprocessed icing parameters; The first judgment module is used to make a preliminary judgment on the icing status of the power distribution line switch based on the preprocessed icing parameters, and obtain a preliminary judgment result; The second judgment module is used to perform a comprehensive icing index analysis based on the preliminary judgment result, icing-derived parameters and pre-processed icing parameters, obtain the target comprehensive icing index, and then perform a precise state determination of the icing status of the power distribution line switch to obtain the state determination result. The vibration processing module is used to determine vibration parameters based on the state determination result, and control the vibration de-icing module unit to perform vibration de-icing processing on the power distribution line switch based on the vibration parameters. The force adjustment module is used by the control unit to detect the remaining icing status of the power distribution line switch, determine the opening and closing force parameters based on the remaining icing status, and use the opening and closing force parameters to control the force adjustment unit to perform the opening and closing action of the power distribution line switch.

9. An electronic device comprising a memory and a processor, characterized in that: The memory is used to store computer-executable instructions, and when the processor executes the computer-executable instructions, it implements the steps of the de-icing method for a power distribution line switch as described in any one of claims 1 to 7.

10. A computer-readable storage medium having computer-executable instructions stored thereon, characterized in that: When the computer-executable instructions are executed by the processor, they implement the steps of the de-icing method for a power distribution line switch as described in any one of claims 1 to 7.

Images