Power transmission line forest fire tripping risk assessment method and device, electronic equipment and storage medium

Abstract

The invention discloses a power transmission line mountain fire tripping risk assessment method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining the flame height, flame continuous region height and line height of each line grid corresponding to a power transmission line, carrying out the judgment of the line bridging condition of each line grid of the power transmission line, comprising three conditions of smoke and line bridging, flame discontinuous area and line bridging and flame continuous area and line bridging; according to the line bridging condition of each line grid, line-to-ground breakdown voltage and insulator forest fire flashover voltage of each line grid are calculated and generated; calculating and generating a mountain fire tripping risk value of each line grid according to the line-to-ground breakdown voltage of each line grid and the insulator mountain fire flashover voltage; by implementing the method, the comprehensiveness of power transmission line forest fire tripping risk assessment can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wildfire prevention and control, and particularly to a method, device, electronic device and storage medium for evaluating the wildfire tripping risk of a transmission line. Background Art

[0002] Wildfires are important external factors threatening the safe operation of transmission lines. Line tripping caused by wildfires not only affects the power supply stability of the power grid, but may also lead to large-scale power outages. Therefore, it is of great significance to evaluate the wildfire tripping risk. By accurately evaluating the tripping risk of a transmission line in a wildfire environment, a scientific decision-making basis can be provided for power grid operation and maintenance, and the impact of wildfires on the power system can be effectively reduced.

[0003] Existing wildfire tripping risk assessment technologies mainly focus on analyzing the bridging risk between the flame and the transmission line, including two cases: bridging between the discontinuous area of the flame and the line and bridging between the continuous area of the flame and the line. In these studies, the main evaluation is the decrease in the insulation strength of the air gap of the transmission line under the direct action of the flame and its impact on the tripping risk. However, the soot and hot air flow generated by the flame also have an important impact on the insulator interface of the transmission line, especially in the case of bridging between the soot and the line. This impact not only accelerates the deposition of pollutants on the surface of the insulator, but may also form a conductive path through the action of soot particles and hot air flow, thereby significantly reducing the surface insulation performance of the insulator and ultimately triggering the risk of surface flashover. The existing assessment methods cannot accurately reflect the potential threat of wildfires to transmission lines, especially in the case of bridging between the soot and the line, which affects the judgment of the wildfire tripping risk assessment of transmission lines, and also makes it difficult for operation and maintenance personnel to take effective preventive measures when facing wildfire threats, thus increasing the risk of line failures caused by wildfires and further threatening the stable operation of the power system. Summary of the Invention

[0004] Embodiments of the present invention provide a method, device, electronic device and storage medium for evaluating the wildfire tripping risk of a transmission line. By implementing the present invention, the comprehensiveness of the wildfire tripping risk assessment of the transmission line can be improved, and further the stable operation of the power system can be ensured.

[0005] An embodiment of the present invention provides a method for evaluating the wildfire tripping risk of a transmission line, including:

[0006] Obtaining the flame height, the height of the continuous flame area and the line height of each line grid corresponding to the transmission line;

[0007] When the line height of the line grid is higher than the flame height, it is determined that the line bridging situation of the line grid is the bridging of soot and the line; when the line height of the line grid is not higher than the flame height and the line height is higher than the height of the flame continuous area, it is determined that the line bridging situation of the line grid is the bridging of the non - continuous area of the flame and the line; when the line height of the line grid is not higher than the height of the flame continuous area, it is determined that the line bridging situation of the line grid is the bridging of the flame continuous area and the line;

[0008] According to the line bridging situation of each line grid, calculate and generate the line - to - ground breakdown voltage and the insulator wildfire flashover voltage of each line grid;

[0009] According to the line - to - ground breakdown voltage and the insulator wildfire flashover voltage of each line grid, calculate and generate the wildfire tripping risk value of each line grid;

[0010] According to the wildfire tripping risk values of each line grid, determine the wildfire tripping risk level of the transmission line.

[0011] Furthermore, the following method is used to determine each line grid corresponding to the transmission line:

[0012] Obtain the position information of the transmission line in the research area;

[0013] Perform rasterization processing on the research area to generate a number of grids;

[0014] According to the position information of the transmission line, generate the spatial path of the transmission line;

[0015] Project the spatial path of the transmission line onto the research area;

[0016] The grids in the research area that intersect with the spatial path of the transmission line are used as line grids.

[0017] Furthermore, the following method is used to obtain the flame height and the height of the flame continuous area of each line grid corresponding to the transmission line:

[0018] Obtain the environmental temperature, wind force level, humidity, wind speed, altitude, vegetation type, calorific value of combustibles, combustible load, position information of each line grid, position information of the wildfire ignition point, and altitude of the wildfire ignition point of each line grid;

[0019] According to the environmental temperature, wind force level and humidity of each line grid, calculate and generate the initial wildfire spread speed of each line grid;

[0020] According to the wind speed of each line grid, calculate and generate the wind speed correction coefficient of each line grid;

[0021] Calculate the distances between the wildfire ignition points and each line grid according to the position information of each line grid and the position information of the wildfire ignition points;

[0022] Calculate the slope correction coefficients for each line grid based on the elevation of each line grid, the elevation at the location of the wildfire ignition point, and the distances between the wildfire ignition points and each line grid;

[0023] Determine the correction coefficients for the combustible configuration pattern of each line grid according to the vegetation type of each line grid;

[0024] Calculate the corrected wildfire spread speeds for each line grid based on the initial wildfire spread speeds of each line grid, the wind speed correction coefficients, the slope correction coefficients, and the combustible type correction coefficients;

[0025] Calculate the fire line intensities for each line grid based on the corrected wildfire spread speeds, the calorific values of the combustibles, and the combustible loads of each line grid;

[0026] Calculate the flame heights and the heights of the flame continuous zones for each line grid based on the fire line intensities of each line grid;

[0027] Further, the calculating the line-to-ground breakdown voltages and the insulator wildfire flashover voltages for each line grid according to the line bridging conditions of each line grid includes:

[0028] Obtain the distance correction coefficients, vegetation correction coefficients, flame temperature correction coefficients, and insulation data of the line grid;

[0029] When the line bridging condition of the line grid is that the smoke and dust are bridged with the line, obtain the elevation correction coefficients, particle correction coefficients, smoke and dust zone heights, and flame discontinuous zone heights of each line grid; calculate the line-to-ground breakdown voltages for each line grid according to the distance correction coefficients, vegetation correction coefficients, flame temperature correction coefficients, elevation correction coefficients, particle correction coefficients, smoke and dust zone heights, flame discontinuous zone heights, and flame continuous zone heights of each line grid; calculate the insulator wildfire flashover voltages for each line grid according to the distance correction coefficients, flame temperature correction coefficients, insulation data, and elevation correction coefficients of each line grid;

[0030] When the line bridging condition of the line grid is that the flame discontinuous zone is bridged with the line, obtain the particle correction coefficients and flame discontinuous zone heights of each line grid; calculate the line-to-ground breakdown voltages for each line grid according to the distance correction coefficients, vegetation correction coefficients, particle correction coefficients, flame discontinuous zone heights, and flame continuous zone heights of each line grid; calculate the insulator wildfire flashover voltages for each line grid according to the distance correction coefficients, flame temperature correction coefficients, and insulation data of each line grid;

[0031] When the line bridging condition of the line grid is that the flame continuous area is bridged with the line, according to the distance correction coefficient, vegetation correction coefficient and line height of each line grid, calculate and generate the line-to-ground breakdown voltage of each line grid; according to the distance correction coefficient, flame temperature correction coefficient and insulation data of each line grid, calculate and generate the insulator mountain fire flashover voltage of each line grid.

[0032] Further, calculating and generating the wildfire tripping risk value of each line grid according to the line-to-ground breakdown voltage and insulator mountain fire flashover voltage of each line grid includes:

[0033] Obtain the rated voltage of the transmission line;

[0034] According to the rated voltage of the transmission line and the line-to-ground breakdown voltage of each line grid, calculate and generate the transmission line-to-ground flame breakdown tripping risk value of each line grid;

[0035] According to the rated voltage of the transmission line and the insulator mountain fire flashover voltage of each line grid, calculate and generate the insulator mountain fire flashover tripping risk value of each line grid;

[0036] For each line grid, take the maximum value among the transmission line-to-ground flame breakdown tripping risk value and the insulator mountain fire flashover tripping risk value as the wildfire tripping risk value of the line grid.

[0037] Further, determining the wildfire tripping risk level of the transmission line according to the wildfire tripping risk value of each line grid includes:

[0038] Take the maximum value among the wildfire tripping risk values of each line grid as the wildfire tripping risk value of the transmission line;

[0039] Compare the wildfire tripping risk value of the transmission line with a number of preset wildfire tripping risk level intervals;

[0040] Take the wildfire tripping risk level interval where the wildfire tripping risk value of the transmission line is located as the target wildfire tripping risk level interval;

[0041] Take the wildfire tripping risk level corresponding to the target wildfire tripping risk level interval as the wildfire tripping risk level of the transmission line.

[0042] Further, after determining the wildfire tripping risk level of the transmission line according to the wildfire tripping risk value of each line grid, it further includes:

[0043] According to the wildfire tripping risk level of the transmission line, issue an alarm message; wherein, the alarm message includes the wildfire tripping risk level of the transmission line and the location information of the transmission line.

[0044] Based on the above method item embodiments, the present invention correspondingly provides device item embodiments.

[0045] An embodiment of the present invention provides an evaluation device for the risk of wildfire tripping of a transmission line, including: a data acquisition module, a line bridging situation determination module, a wildfire tripping risk value calculation module, and a wildfire tripping risk level determination module;

[0046] The data acquisition module is used to acquire the flame height, the height of the flame continuous area, and the line height of each line grid of the transmission line within the research area;

[0047] The line bridging situation determination module is used to determine that the line bridging situation of the line grid is the bridging of soot and the line when the line height of the line grid is higher than the flame height; determine that the line bridging situation of the line grid is the bridging of the non - continuous area of the flame and the line when the line height of the line grid is not higher than the flame height and the line height is higher than the height of the flame continuous area; determine that the line bridging situation of the line grid is the bridging of the flame continuous area and the line when the line height of the line grid is not higher than the height of the flame continuous area;

[0048] The wildfire tripping risk value calculation module is used to calculate and generate the line - to - ground breakdown voltage and the insulator wildfire flashover voltage of each line grid according to the line bridging situation of each line grid; calculate and generate the wildfire tripping risk value of each line grid according to the line - to - ground breakdown voltage and the insulator wildfire flashover voltage of each line grid;

[0049] The wildfire tripping risk level determination module is used to determine the wildfire tripping risk level of the transmission line according to the wildfire tripping risk value of each line grid.

[0050] Based on the above method item embodiments, the present invention correspondingly provides electronic device item embodiments.

[0051] An embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it can implement the evaluation method for the risk of wildfire tripping of a transmission line described in any one of the above method item embodiments.

[0052] Based on the above method item embodiments, the present invention correspondingly provides storage medium item embodiments.

[0053] An embodiment of the present invention provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, it can implement the evaluation method for the risk of wildfire tripping of a transmission line described in any one of the above method item embodiments.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] An embodiment of the present invention provides a method, device, electronic device and storage medium for evaluating the risk of wildfire tripping of a transmission line. The method determines the line bridging situation of each line grid of the transmission line by obtaining the flame height, the height of the flame continuous area and the line height corresponding to the transmission line, including three situations: bridging of smoke and dust with the line, bridging of the non - continuous area of the flame with the line, and bridging of the continuous area of the flame with the line. On this basis, the line - to - ground breakdown voltage and the insulator wildfire flashover voltage of each line grid are calculated, and further the wildfire tripping risk value of each line grid is generated. The wildfire tripping risk level of the transmission line is comprehensively evaluated according to the risk values of each line grid. When evaluating the wildfire tripping risk of the transmission line, the relative position relationship between the line height and the flame height is fully considered, covering three possible situations: bridging of smoke and dust with the line, bridging of the non - continuous area of the flame with the line, and bridging of the continuous area of the flame with the line, which can comprehensively evaluate the safety risk of the transmission line in the wildfire environment, effectively improve the accuracy and coverage of the evaluation of the wildfire tripping risk of the transmission line, and further ensure the stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 is a schematic flowchart of a method for evaluating the risk of wildfire tripping of a transmission line provided by an embodiment of the present invention.

[0057] Figure 2 is a diagram showing the vertical distribution of the flame of a line grid provided by an embodiment of the present invention.

[0058] Figure 3 is a diagram showing the positional relationship between the flame and the line in the case where the line bridging situation is the bridging of smoke and dust with the line provided by an embodiment of the present invention.

[0059] Figure 4 is a diagram showing the positional relationship between the flame and the line in the case where the line bridging situation is the bridging of the non - continuous area of the flame with the line provided by an embodiment of the present invention.

[0060] Figure 5 is a diagram showing the positional relationship between the flame and the line in the case where the line bridging situation is the bridging of the continuous area of the flame with the line provided by an embodiment of the present invention.

[0061] Figure 6 is a schematic structural diagram of an apparatus for evaluating the risk of wildfire tripping of a transmission line provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0062] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0063] The evaluation methods for the risk of wildfire tripping of transmission lines proposed by the present invention are all based on the premise that there is a risk of wildfire tripping for transmission lines. In a preferred embodiment, the following method is used to determine whether there is a risk of wildfire tripping for a transmission line:

[0064] According to the location information of the transmission line to be evaluated and the location information of the wildfire ignition point, it is determined whether the distance between the transmission line and the wildfire ignition point exceeds a preset distance threshold. If so, it is determined that there is no risk of wildfire tripping for the transmission line; if not, it is determined that there is a risk of wildfire tripping for the transmission line.

[0065] Optionally, the location information of the wildfire ignition point is in longitude and latitude coordinates, which can be obtained by meteorological satellites through hotspot identification technology or fire point identification technology based on radar echoes and combined with geographic information system data, or can be obtained by distributed on-line monitoring devices installed on the poles and towers using technologies such as image recognition to identify the wildfire and its distance, and determine the accurate longitude and latitude coordinates of the wildfire ignition point.

[0066] Exemplarily, it is determined whether the distance between the transmission line and the wildfire ignition point exceeds three kilometers. If so, it is determined that there is no risk of wildfire tripping for the transmission line; if not, it is determined that there is a risk of wildfire tripping for the transmission line.

[0067] As Figure 1 shown, an embodiment of the present invention provides an evaluation method for the risk of wildfire tripping of a transmission line, which at least includes the following steps:

[0068] Step S1, obtain the flame height, the height of the flame continuous area, and the line height of each line grid corresponding to the transmission line;

[0069] In a preferred embodiment, the following method is used to determine each line grid corresponding to the transmission line:

[0070] Obtain the location information of the transmission line in the research area;

[0071] Perform rasterization processing on the research area to generate a number of grids;

[0072] Generate the spatial path of the transmission line according to the location information of the transmission line;

[0073] Project the spatial path of the transmission line onto the research area;

[0074] The grids that intersect the spatial path of the transmission line within the study area are taken as the line grids.

[0075] Optionally, an appropriate grid size can be selected according to actual requirements. Common sizes include 100 m × 100 m, 250 m × 250 m, 500 m × 500 m, or 1000 m × 1000 m, etc. Different grid sizes are suitable for different application scenarios. For example, a smaller grid size, such as 100 m × 100 m, can depict the characteristics of the study area more precisely and is suitable for situations that require high-resolution analysis; while a larger grid size, such as 1000 m × 1000 m, is suitable for handling analysis tasks with a wider scope and focusing on macroscopic trends, and can significantly reduce the computational complexity.

[0076] It can be understood that the line grid refers to all the grids in the connection line between two adjacent poles and towers corresponding to the transmission line.

[0077] Specifically, in a preferred embodiment, the flame height and the height of the continuous flame area of each line grid corresponding to the transmission line are obtained through the following methods:

[0078] Obtain the ambient temperature, wind force level, humidity, wind speed, altitude, vegetation type, calorific value of combustibles, fuel load, position information of each line grid, position information of the wildfire ignition point, and altitude of the wildfire ignition point;

[0079] Calculate and generate the initial wildfire spread speed of each line grid based on the ambient temperature, wind force level, and humidity of each line grid;

[0080] Calculate and generate the wind speed correction coefficient of each line grid according to the wind speed of each line grid;

[0081] Calculate and generate the distance between the wildfire ignition point and each line grid based on the position information of each line grid and the position information of the wildfire ignition point;

[0082] Calculate and generate the slope correction coefficient of each line grid according to the altitude of each line grid, the altitude of the location where the wildfire ignition point is located, and the distance between the wildfire ignition point and each line grid;

[0083] Determine the correction coefficient of the combustible configuration pattern of each line grid according to the vegetation type of each line grid;

[0084] Calculate and generate the corrected wildfire spread speed of each line grid based on the initial wildfire spread speed, wind speed correction coefficient, slope correction coefficient, and combustible type correction coefficient of each line grid;

[0085] Calculate the fire line intensity of each line grid based on the corrected wildfire spread speed, calorific value of combustibles, and combustible load of each line grid.

[0086] Calculate the flame height and the height of the flame continuous zone of each line grid based on the fire line intensity of each line grid.

[0087] Optionally, calculate the initial wildfire spread speed R of each line grid according to the ambient temperature, wind force level, and humidity of each line grid through the following formula 0 :

[0088] R 0 = aT + bV + c(100 - h) - D

[0089] where, R 0 is the initial flame spread speed; T is the ambient temperature in °C; V is the wind force level; H is the humidity in %; a, b, c, and D are constant coefficients; through fitting of experimental data, a is taken as 0.03, b is taken as 0.05, c is taken as 0.01, and D is taken as 0.3.

[0090] Optionally, calculate the wind speed correction coefficient K of each line grid according to the wind speed of each line grid through the following formula W :

[0091] K W = αe 0.178v

[0092] where, K W is the wind speed correction coefficient; v is the wind speed; α is the regional coefficient, and the conventional value is 1, which can be appropriately adjusted according to the regional environment change.

[0093] Optionally, calculate the slope correction coefficient K of each line grid according to the altitude of each line grid, the altitude of the wildfire ignition point, and the distance between the wildfire ignition point and each line grid through the following formula s :

[0094]

[0095] where, K S is the slope correction coefficient; θ is the slope; β is the regional coefficient for slope correction, and the conventional value is 1, which can be appropriately adjusted according to the regional environment change; P is the slope type index; h A is the altitude of the wildfire ignition point; h B is the altitude of the line grid; x is the distance between the wildfire ignition point and the line grid.

[0096] Exemplarily, determine the correction coefficient K of the combustible configuration pattern of each line grid according to the vegetation type of each line grid through the following tablez :

[0097]

[0098] Optionally, according to the initial wildfire spreading speed, wind speed correction coefficient, slope correction coefficient, and combustible type correction coefficient of each line grid, the corrected wildfire spreading speed R of each line grid is calculated and generated through the following formula:

[0099] R = R 0 ·K w ·K S ·K z

[0100] wherein, R is the corrected wildfire spreading speed; R 0 is the initial wildfire spreading speed; K W is the wind speed correction coefficient; K S is the slope correction coefficient; K z is the combustible configuration pattern correction coefficient.

[0101] Optionally, according to the corrected wildfire spreading speed, calorific value of combustibles, and combustible load of each line grid, the fire line intensity I of each line grid is calculated and generated through the following formula:

[0102] I = qWR / 600

[0103] wherein, I is the fire line intensity, with the unit of kW / m; q is the calorific value of combustibles, with the unit of kJ / kg; W is the combustible load, with the unit of t / km 2 ; R is the corrected wildfire spreading speed, with the unit of m / min.

[0104] Exemplarily, the calorific value q of combustibles of the line grid is determined through the following table:

[0105]

[0106] Optionally, the vertical distribution of the flame of the line grid is as Figure 2 shown, and the flame is mainly composed of three parts: the continuous flame area, the discontinuous flame area, and the soot area.

[0107] According to the fire line intensity of each line grid, the flame height H f of each line grid and the height H F of the continuous flame area are calculated and generated through the following formula:

[0108] H f = γ(I / 250) 1 / 2

[0109] wherein, H fH is the flame height; I is the fire line intensity, with the unit of kW / m; γ is the regional correction coefficient, and usually γ is taken as 1.

[0110]

[0111] Among them, H F is the height of the flame continuous zone; H f is the flame height.

[0112] Step S2: When the line height of the line grid is higher than the flame height, determine that the line bridging situation of the line grid is bridging between soot and the line; when the line height of the line grid is not higher than the flame height and the line height is higher than the height of the flame continuous zone, determine that the line bridging situation of the line grid is bridging between the non - continuous zone of the flame and the line; when the line height of the line grid is not higher than the height of the flame continuous zone, determine that the line bridging situation of the line grid is bridging between the continuous zone of the flame and the line.

[0113] Exemplarily, when the line bridging situation is bridging between soot and the line, the positional relationship between the flame and the line is as Figure 3 shown.

[0114] Exemplarily, when the line bridging situation is bridging between the non - continuous zone of the flame and the line, the positional relationship between the flame and the line is as Figure 4 shown.

[0115] Exemplarily, when the line bridging situation is bridging between the continuous zone of the flame and the line, the positional relationship between the flame and the line is as Figure 5 shown.

[0116] It can be understood that by accurately comparing the line grid height with the heights of different regions of the flame, accurate identification of the bridging situation between the line and the flame or soot can be achieved. Utilizing the relationship between the line height and the flame height to clarify the specific type of bridging, separating soot, the non - continuous zone of the flame, and the continuous zone of the flame helps to improve the accuracy of identification and avoid errors caused by fuzzy judgment. This hierarchical determination method can more clearly reflect the threat degree of the flame or soot to the line, thereby effectively evaluating the risk level of the line's wildfire tripping.

[0117] Step S3: According to the line bridging situation of each line grid, calculate and generate the line - to - ground breakdown voltage and the insulator wildfire flashover voltage of each line grid.

[0118] Optionally, the calculating and generating the line - to - ground breakdown voltage and the insulator wildfire flashover voltage of each line grid according to the line bridging situation of each line grid includes:

[0119] Obtain the distance correction coefficient, vegetation correction coefficient, flame temperature correction coefficient, and insulation data of the line grid;

[0120] When the line bridging condition of the line grid is that the soot is bridged with the line, obtain the altitude correction coefficient, particle correction coefficient, soot area height, and non - continuous flame area height of each line grid; calculate and generate the line - to - ground breakdown voltage of each line grid according to the distance correction coefficient, vegetation correction coefficient, flame temperature correction coefficient, altitude correction coefficient, particle correction coefficient, soot area height, non - continuous flame area height, and continuous flame area height of each line grid; calculate and generate the insulator wildfire flashover voltage of each line grid according to the distance correction coefficient, flame temperature correction coefficient, insulation data, and altitude correction coefficient of each line grid;

[0121] When the line bridging condition of the line grid is that the non - continuous flame area is bridged with the line, obtain the particle correction coefficient and non - continuous flame area height of each line grid; calculate and generate the line - to - ground breakdown voltage of each line grid according to the distance correction coefficient, vegetation correction coefficient, particle correction coefficient, non - continuous flame area height, and continuous flame area height of each line grid; calculate and generate the insulator wildfire flashover voltage of each line grid according to the distance correction coefficient, flame temperature correction coefficient, and insulation data of each line grid;

[0122] When the line bridging condition of the line grid is that the continuous flame area is bridged with the line, calculate and generate the line - to - ground breakdown voltage of each line grid according to the distance correction coefficient, vegetation correction coefficient, and line height of each line grid; calculate and generate the insulator wildfire flashover voltage of each line grid according to the distance correction coefficient, flame temperature correction coefficient, and insulation data of each line grid.

[0123] Exemplarily, the distance correction coefficient C is calculated through the following formula x :

[0124]

[0125] where C x is the distance correction coefficient; x is the distance between the wildfire ignition point and the line grid.

[0126] Exemplarily, the vegetation correction coefficient includes the vegetation density correction coefficient, vegetation type correction coefficient, and vegetation water content correction coefficient;

[0127] The vegetation density correction coefficient C is calculated through the following formula d :

[0128]

[0129] where C d is the vegetation density correction coefficient; W is the fuel load.

[0130] The vegetation type correction coefficient C is determined through the following table k :

[0131]

[0132] The vegetation water content correction coefficient C is calculated by the following formula w :

[0133]

[0134] where C w is the vegetation water content correction coefficient; D is the absolute water content of the vegetation.

[0135] Exemplarily, the absolute water content of the vegetation can be obtained by looking up a table:

[0136]

[0137] Exemplarily, the flame temperature correction coefficient C is calculated by the following formula t :

[0138]

[0139] where C t is the flame temperature correction coefficient; T 0 is the highest temperature at the top of the flame of this type of vegetation; T f is the temperature of the flame at the height of the conductor; T is the ambient temperature; Δθ is the relative ambient temperature; I is the fire line intensity; H f is the flame height; H l is the line height.

[0140] Exemplarily, the insulation data includes the insulator type correction coefficient, the insulator flashover voltage correction coefficient for wildfires, and the insulator creepage distance;

[0141] The insulator type correction coefficient C is determined by the following formula j :

[0142]

[0143] where C j is the insulator type correction coefficient, and the specific value can be determined according to the actual scenario.

[0144] The insulator flashover voltage correction coefficient C for wildfires is determined by the following formula G :

[0145]

[0146] where C G is the insulator flashover voltage correction coefficient for wildfires; ρ g is the smoke concentration.

[0147] Optionally, the method for obtaining the flue gas concentration is as follows:

[0148] Perform radar detection on the line grid, collect the radar echo intensity; perform threshold judgment based on the radar echo intensity to determine whether there is smoke, and eliminate false alarm smoke points through the context method of time series.

[0149] Specifically, determine whether there is smoke through the following formula:

[0150]

[0151] where Z t is the radar echo intensity at time t, with the unit of dBZ; S(t) is the grid smoke situation at time t, and the value of S(t) being 1 indicates the presence of smoke, while the value of S(t) being 0 indicates the absence of smoke.

[0152]

[0153] where S(t - 1) is the grid smoke situation at time t - 1; S(t + 1) is the grid smoke situation at time t + 1;

[0154] If smoke is detected at time t, that is, S(t) = 1, and no smoke is detected at the moments before and after time t, it indicates that the smoke detection result at time t is a false alarm, and the smoke result at time t is re - marked as no smoke.

[0155]

[0156] where S(t - 1) is the grid smoke situation at time t - 1; S(t + 1) is the grid smoke situation at time t + 1;

[0157] If smoke is detected at time t, that is, S(t) = 1, and smoke is detected at both the moments before and after time t, it indicates that the smoke detection result at time t is correct. If the above two conditions are met, the grid smoke situation at time t remains unchanged, that is, S(t) = 1.

[0158] Since the higher the flue gas concentration, the stronger the corresponding radar echo intensity, and the two are positively correlated, the flue gas concentration can be determined from the radar echo intensity.

[0159] ρ g = K g Z

[0160] where ρ g is the flue gas concentration, with the unit of mg / m 3 ; K g is the conversion coefficient between the radar echo intensity and the flue gas concentration, with the unit of mg / m 3dBZ, which can be adjusted according to the on-site operation conditions; Z is the radar echo intensity, with the unit of dBZ.

[0161] In a preferred embodiment, when the line bridging condition of the line grid is that the soot is bridged with the line,

[0162] the altitude correction coefficient C of each line grid is obtained through the following formula a :

[0163]

[0164] where C a is the altitude correction coefficient; h B is the altitude of the line grid.

[0165] The particle correction coefficient C of each line grid is obtained through the following formula p :

[0166]

[0167] where C p is the particle correction coefficient; ρ g is the flue gas concentration.

[0168] The soot area height H s and the flame discontinuous area height H X of each line grid are obtained through the following formula

[0169] H s = H l - H f

[0170] H X = H f - H F

[0171] where H s is the soot area height; H l is the line height; H X is the flame discontinuous area height; H f is the flame height; H F is the flame continuous area height.

[0172] Specifically, according to the distance correction coefficient, vegetation correction coefficient, flame temperature correction coefficient, altitude correction coefficient, particle correction coefficient, soot area height, flame discontinuous area height and flame continuous area height of each line grid, the line-to-ground breakdown voltage U of each line grid is calculated and generated through the following formula g1 :

[0173]

[0174] Among them, U g1 is the breakdown voltage between the line and the ground; C x is the distance correction coefficient; C a is the altitude correction coefficient; C t is the flame temperature correction coefficient; C p is the particle correction coefficient; C d is the vegetation density correction coefficient; C k is the vegetation type correction coefficient; C w is the vegetation water content correction coefficient; H s is the height of the smoke and dust area; H X is the height of the discontinuous flame area; H F is the height of the continuous flame area; E a is the breakdown voltage gradient of the standard air gap 359.2 kV / m; E HX is the average breakdown voltage gradient of the standard discontinuous flame area 173.7 kV / m; E HF is the average breakdown voltage gradient of the standard continuous flame area 60 kV / m.

[0175] Specifically, according to the distance correction coefficient, flame temperature correction coefficient, insulation data and altitude correction coefficient of each line grid, the insulator mountain fire flashover voltage U of each line grid is calculated through the following formula g2 :

[0176]

[0177] Among them, U g2 is the insulator mountain fire flashover voltage; C x is the distance correction coefficient; C a is the altitude correction coefficient; C t is the flame temperature correction coefficient; C G is the insulator mountain fire flashover voltage correction coefficient; C j is the insulator type correction coefficient; l g is the creepage distance of the insulator.

[0178] In a preferred embodiment, when the line bridging condition of the line grid is that the discontinuous flame area is bridged with the line, the particle correction coefficient C of each line grid is obtained through the following formula p :

[0179]

[0180] Among them, C p is the particle correction coefficient; ρ g is the flue gas concentration.

[0181] The height H of the discontinuous flame area of each line grid is obtained through the following formula X :

[0182] H X = H f - H F

[0183] Among them, H X is the height of the non - continuous flame zone; H f is the flame height; H F is the height of the continuous flame zone.

[0184] Specifically, according to the distance correction coefficient, vegetation correction coefficient, particle correction coefficient, height of the non - continuous flame zone, and height of the continuous flame zone of each line grid, the line - to - ground breakdown voltage U of each line grid is calculated and generated through the following formula g1 :

[0185]

[0186] Among them, U g1 is the line - to - ground breakdown voltage; C x is the distance correction coefficient; C p is the particle correction coefficient; C d is the vegetation density correction coefficient; C k is the vegetation type correction coefficient; C w is the vegetation water content correction coefficient; H X is the height of the non - continuous flame zone; H F is the height of the continuous flame zone; E HX is the average breakdown voltage gradient of the standard non - continuous flame zone, 173.7 kV / m; E HF is the average breakdown voltage gradient of the standard continuous flame zone, 60 kV / m.

[0187] Specifically, according to the distance correction coefficient, flame temperature correction coefficient, and insulation data of each line grid, the insulator wildfire flashover voltage U of each line grid is calculated and generated through the following formula g2 :

[0188]

[0189] Among them, U g2 is the insulator wildfire flashover voltage; C x is the distance correction coefficient; C t is the flame temperature correction coefficient; C G is the insulator wildfire flashover voltage correction coefficient; C j is the insulator type correction coefficient; l g is the creepage distance of the insulator.

[0190] In a preferred embodiment, when the line bridging condition of the line grid is that the flame discontinuous area is bridged with the line, according to the distance correction coefficient, vegetation correction coefficient and line height of each line grid, the line-to-ground breakdown voltage U of each line grid is calculated and generated through the following formula g1 :

[0191]

[0192] where U g1 is the line-to-ground breakdown voltage; C x is the distance correction coefficient; C k is the vegetation type correction coefficient in the vegetation correction coefficient; C w is the vegetation water content correction coefficient in the vegetation correction coefficient; H l is the line height; E HF is the average breakdown voltage gradient of the standard flame continuous area, 60 kV / m.

[0193] Specifically, according to the distance correction coefficient, flame temperature correction coefficient and insulation data of each line grid, the insulator mountain fire flashover voltage U of each line grid is calculated and generated through the following formula g2 :

[0194]

[0195] where U g2 is the insulator mountain fire flashover voltage; C x is the distance correction coefficient; C t is the flame temperature correction coefficient; C G is the insulator mountain fire flashover voltage correction coefficient; C j is the insulator type correction coefficient; l g is the creepage distance of the insulator.

[0196] It can be understood that by accurately calculating and generating the line-to-ground breakdown voltage and the insulator mountain fire flashover voltage according to the line bridging condition of each line grid, it provides a reliable basis for evaluating the insulation ability and fault risk of the transmission line in the mountain fire environment. The calculation of the line-to-ground breakdown voltage can reflect the electrical characteristics of the line breakdown under extreme conditions and directly indicate the tolerance ability of the line, while the insulator mountain fire flashover voltage further considers the influence of the mountain fire environment on the insulator performance and provides a quantitative standard for judging the interference degree of the mountain fire on the line operation.

[0197] Step S4: Calculate and generate the mountain fire tripping risk value of each line grid according to the line-to-ground breakdown voltage and the insulator mountain fire flashover voltage of each line grid;

[0198] In a specific embodiment, calculating and generating the wildfire tripping risk value of each line grid according to the line-to-ground breakdown voltage of each line grid and the insulator wildfire flashover voltage includes:

[0199] Obtain the rated voltage of the transmission line;

[0200] Calculate and generate the transmission line-to-ground flame breakdown tripping risk value of each line grid according to the rated voltage of the transmission line and the line-to-ground breakdown voltage of each line grid;

[0201] Calculate and generate the insulator wildfire flashover tripping risk value of each line grid according to the rated voltage of the transmission line and the insulator wildfire flashover voltage of each line grid;

[0202] For each line grid, take the maximum value of the transmission line-to-ground flame breakdown tripping risk value and the insulator wildfire flashover tripping risk value as the wildfire tripping risk value of the line grid.

[0203] Preferably, the transmission line-to-ground flame breakdown tripping risk value of each line grid is calculated and generated by the following formula:

[0204]

[0205] Wherein, S a is the transmission line-to-ground flame breakdown tripping risk value; U g1 is the line-to-ground breakdown voltage; U is the rated voltage of the transmission line; k is the maximum allowable deviation coefficient, taking 1.15 for 220 kV and below, and taking 1.1 for 330 kV and above.

[0206] Preferably, the insulator wildfire flashover tripping risk value of each line grid is calculated and generated by the following formula:

[0207]

[0208] Wherein, S a is the insulator wildfire flashover tripping risk value; U g2 is the insulator wildfire flashover voltage; U is the rated voltage of the transmission line; k is the maximum allowable deviation coefficient, taking 1.15 for 220 kV and below, and taking 1.1 for 330 kV and above.

[0209] Step S5: Determine the wildfire tripping risk level of the transmission line according to the wildfire tripping risk value of each line grid.

[0210] Preferably, the determining the wildfire tripping risk level of the transmission line according to the wildfire tripping risk value of each line grid includes:

[0211] Take the maximum value among the wildfire tripping risk values of each line grid as the wildfire tripping risk value of the transmission line;

[0212] Compare the wildfire tripping risk value of the transmission line with a number of preset wildfire tripping risk level intervals;

[0213] Take the wildfire tripping risk level interval where the wildfire tripping risk value of the transmission line is located as the target wildfire tripping risk level interval;

[0214] Take the wildfire tripping risk level corresponding to the target wildfire tripping risk level interval as the wildfire tripping risk level of the transmission line.

[0215] Exemplarily, the wildfire tripping risk level can be determined according to the target wildfire tripping risk level intervals in the following table.

[0216]

[0217] It can be understood that through layer-by-layer analysis and comparison, the wildfire tripping risk value of the transmission line is accurately mapped to the corresponding wildfire tripping risk level, providing a systematic and quantitative risk assessment method. First, by selecting the maximum value among the wildfire tripping risk values of each line grid as the overall wildfire tripping risk value of the transmission line, it can effectively reflect the decisive influence of the most dangerous grid in the whole line on the overall risk, avoiding the hidden danger of high-risk areas being covered up by local low risks, thus ensuring the comprehensiveness and accuracy of risk assessment.

[0218] In a preferred embodiment, after determining the wildfire tripping risk level of the transmission line according to the wildfire tripping risk values of each line grid, it further includes:

[0219] Issue an alarm message according to the wildfire tripping risk level of the transmission line; wherein, the alarm message includes the wildfire tripping risk level of the transmission line and the location information of the transmission line.

[0220] It can be understood that by combining the wildfire tripping risk values of each line grid of the transmission line, accurately determining the risk level of wildfire tripping, and on this basis issuing an alarm message containing detailed information, a complete closed-loop from risk assessment to information transmission is realized. Through the clear division of risk levels, the pertinence and accuracy of risk warning can be effectively improved, so that the alarm message can clearly reflect the potential threat degree of the transmission line. The risk level and location information included in the alarm message provide key support for relevant departments to quickly locate high-risk lines, which helps to take targeted emergency measures in a timely manner.

[0221] Based on the above method item embodiment, the present invention correspondingly provides a device item embodiment.

[0222] Such as Figure 5As shown in the figure, an embodiment of the present invention provides an evaluation device for the risk of wildfire tripping of a transmission line, including: a data acquisition module, a line bridging situation determination module, a wildfire tripping risk value calculation module, and a wildfire tripping risk level determination module;

[0223] The data acquisition module is used to acquire the flame height, the height of the continuous flame area, and the line height of each line grid of the transmission line in the research area;

[0224] The line bridging situation determination module is used to determine that the line bridging situation of the line grid is the bridging of soot and the line when the line height of the line grid is higher than the flame height; determine that the line bridging situation of the line grid is the bridging of the non - continuous flame area and the line when the line height of the line grid is not higher than the flame height and is higher than the height of the continuous flame area; determine that the line bridging situation of the line grid is the bridging of the continuous flame area and the line when the line height of the line grid is not higher than the height of the continuous flame area;

[0225] The wildfire tripping risk value calculation module is used to calculate and generate the line - to - ground breakdown voltage and the insulator wildfire flashover voltage of each line grid according to the line bridging situation of each line grid; calculate and generate the wildfire tripping risk value of each line grid according to the line - to - ground breakdown voltage and the insulator wildfire flashover voltage of each line grid;

[0226] The wildfire tripping risk level determination module is used to determine the wildfire tripping risk level of the transmission line according to the wildfire tripping risk value of each line grid.

[0227] It should be noted that the embodiments of the device described above correspond to the above - mentioned embodiments of the present invention and can implement any one of the above - mentioned evaluation methods for the risk of wildfire tripping of the transmission line. In addition, the embodiments of the above - mentioned device are merely illustrative. The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the attached drawings of the device embodiment provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement it without creative work.

[0228] Based on the above - mentioned method embodiment of the present invention, an embodiment of an electronic device is correspondingly provided.

[0229] An embodiment of the present invention provides an electronic device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the evaluation method for the risk of wildfire tripping of the transmission line according to any one of the present invention, or when the processor executes the computer program, it implements the functions of each module in the above device embodiments.

[0230] Exemplarily, the computer program may be divided into one or more modules. The one or more modules are stored in the memory and executed by the processor to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of completing specific functions, and these instruction segments are used to describe the execution process of the computer program in the terminal device.

[0231] The terminal device may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory.

[0232] The so-called processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The processor is the control center of the terminal device and connects various parts of the entire terminal device through various interfaces and lines.

[0233] The memory can be used to store the computer programs and / or modules. By running or executing the computer programs and / or modules stored in the memory and invoking the data stored in the memory, the processor realizes various functions of the terminal device. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function, etc.; the data storage area can store data created according to the use of the mobile phone, etc. In addition, the memory can include high-speed random access memory, and can also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, Flash Card, at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

[0234] Based on the above method embodiment, the present invention correspondingly provides a storage medium embodiment;

[0235] Another embodiment of the present invention provides a storage medium, which includes a stored computer program. When the computer program runs, it controls the device where the storage medium is located to execute any one of the above-mentioned evaluation methods for the risk of wildfire tripping of a transmission line of the present invention.

[0236] Among them, the above storage medium is a computer-readable storage medium. The computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0237] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0238] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A method for assessing the risk of power transmission line tripping due to wildfire, characterized in that: include: Obtaining the flame height, flame continuous area height and line height of each line grid corresponding to the transmission line; In the case where the line height of the line grid is higher than the flame height, the line bridging condition of the line grid is determined to be smoke and line bridging; When the line height of the line grid is not higher than the flame height and the line height is higher than the flame continuous zone height, the line bridging condition of the line grid is determined to be the flame discontinuous zone and line bridging; when the line height of the line grid is not higher than the flame continuous zone height, the line bridging condition of the line grid is determined to be the flame continuous zone and line bridging; According to the line bridging conditions of each line grid, the line-to-ground breakdown voltage and the insulator flashover voltage of each line grid are calculated and generated; According to the line-to-ground breakdown voltage of each line grid and the wildfire flashover voltage of the insulator, the wildfire tripping risk value of each line grid is calculated and generated; Determine the wildfire tripping risk level of the transmission line based on the wildfire tripping risk value of each line grid.

2. A method for assessing the risk of a power transmission line tripping due to wildfire as claimed in claim 1, characterized in that: The grids corresponding to the transmission lines are determined in the following way: Obtain location information of transmission lines in the study area; Rasterize the study area to generate several rasters; generating a spatial path of the transmission line according to the location information of the transmission line; Project the spatial paths of transmission lines onto the study area; The grids that intersect the spatial paths of the transmission lines in the study area are taken as line grids.

3. A method for assessing the risk of a power transmission line tripping due to wildfire as claimed in claim 1, characterized in that: The flame height and flame continuous area height of each line grid corresponding to the transmission line are obtained by the following method: Obtain the ambient temperature of each line grid, the wind force level of each line grid, the humidity of each line grid, the wind speed of each line grid, the altitude of each line grid, the vegetation type of each line grid, the calorific value of the combustibles of each line grid, the combustible load of each line grid, the location information of each line grid, the location information of the wildfire point, and the altitude of the wildfire point; According to the ambient temperature, wind force level and humidity of each line grid, the initial spread speed of wildfire of each line grid is calculated and generated; According to the wind speed of each line grid, the wind speed correction coefficient of each line grid is calculated and generated; According to the location information of each line grid and the location information of the wildfire point, the distance between the wildfire point and each line grid is calculated; The slope correction coefficient of each line grid is calculated and generated according to the altitude of each line grid, the altitude of the location of the wildfire point, and the distance between the wildfire point and each line grid; Determine the combustible configuration pattern correction coefficient of each line grid according to the vegetation type of each line grid; According to the initial wildfire spread speed, wind speed correction factor, slope correction factor and combustible type correction factor of each line grid, the corrected wildfire spread speed of each line grid is calculated and generated; The fire line intensity of each line grid is calculated and generated according to the corrected wildfire spread speed, combustible calorific value and combustible load of each line grid; According to the fire line intensity of each line grid, the flame height of each line grid and the flame continuous area height are calculated and generated.

4. A method for assessing the risk of a power transmission line tripping due to wildfire as claimed in claim 3, characterized in that: The method of calculating and generating the line-to-ground breakdown voltage and the insulator flashover voltage of each line grid according to the line bridging condition of each line grid comprises: Obtain distance correction factors, vegetation correction factors, flame temperature correction factors and insulation data for the line grid; When the line bridging condition of the line grid is smoke and line bridging, obtain the altitude correction coefficient, particle correction coefficient, smoke area height and flame discontinuous area height of each line grid; calculate and generate the line-to-ground breakdown voltage of each line grid according to the distance correction coefficient, vegetation correction coefficient, flame temperature correction coefficient, altitude correction coefficient, particle correction coefficient, smoke area height, flame discontinuous area height and flame continuous area height of each line grid; calculate and generate the insulator wildfire flashover voltage of each line grid according to the distance correction coefficient, flame temperature correction coefficient, insulation data and altitude correction coefficient of each line grid; When the line bridging situation of the line grid is the flame discontinuous zone and the line bridging, the particle correction coefficient and the flame discontinuous zone height of each line grid are obtained; the line-to-ground breakdown voltage of each line grid is calculated and generated according to the distance correction coefficient, vegetation correction coefficient, particle correction coefficient, flame discontinuous zone height and flame continuous zone height of each line grid; the insulator wildfire flashover voltage of each line grid is calculated and generated according to the distance correction coefficient, flame temperature correction coefficient and insulation data of each line grid; When the line bridging situation of the line grid is that the flame continuous zone and the line are bridged, the line-to-ground breakdown voltage of each line grid is calculated and generated according to the distance correction coefficient, vegetation correction coefficient and line height of each line grid; the insulator wildfire flashover voltage of each line grid is calculated and generated according to the distance correction coefficient, flame temperature correction coefficient and insulation data of each line grid.

5. A method for assessing the risk of a power transmission line tripping due to wildfire as claimed in claim 4, characterized in that: The method of calculating and generating the wildfire tripping risk value of each line grid according to the line-to-ground breakdown voltage of each line grid and the wildfire flashover voltage of the insulator includes: Get the rated voltage of the transmission line; According to the rated voltage of the transmission line and the line-to-ground breakdown voltage of each line grid, the transmission line-to-ground flame breakdown tripping risk value of each line grid is calculated and generated; According to the rated voltage of the transmission line and the wildfire flashover voltage of the insulators of each line grid, the wildfire flashover tripping risk value of the insulators of each line grid is calculated and generated; For each line grid, the maximum value of the transmission line-to-ground flame breakdown tripping risk value and the insulator wildfire flashover tripping risk value is taken as the wildfire tripping risk value of the line grid.

6. A method for assessing the risk of a power transmission line tripping due to wildfire as claimed in claim 5, characterized in that: Determining the wildfire tripping risk level of the transmission line according to the wildfire tripping risk value of each line grid includes: The maximum value of the wildfire tripping risk values ​​of each line grid is used as the wildfire tripping risk value of the transmission line; Compare the wildfire tripping risk value of the transmission line with a number of preset wildfire tripping risk level intervals; The wildfire tripping risk level interval in which the wildfire tripping risk value of the transmission line is located is used as the target wildfire tripping risk level interval; The wildfire tripping risk level corresponding to the target wildfire tripping risk level interval is used as the wildfire tripping risk level of the transmission line.

7. A method for assessing the risk of a power transmission line tripping due to wildfire as claimed in claim 6, characterized in that: After determining the wildfire tripping risk level of the transmission line according to the wildfire tripping risk value of each line grid, it also includes: According to the wildfire tripping risk level of the transmission line, an alarm information is issued; wherein the alarm information includes the wildfire tripping risk level of the transmission line and the location information of the transmission line.

8. A device for assessing the risk of a power transmission line tripping due to wildfire, characterized in that: include: Data acquisition module, line bridging condition determination module, wildfire tripping risk value calculation module and wildfire tripping risk level determination module; The data acquisition module is used to obtain the flame height, flame continuous area height and line height of each line grid of the power transmission line in the study area; The line bridging condition determination module is used to determine that the line bridging condition of the line grid is smoke and line bridging when the line height of the line grid is higher than the flame height; When the line height of the line grid is not higher than the flame height and the line height is higher than the flame continuous zone height, the line bridging condition of the line grid is determined to be the flame discontinuous zone and line bridging; when the line height of the line grid is not higher than the flame continuous zone height, the line bridging condition of the line grid is determined to be the flame continuous zone and line bridging; The mountain fire tripping risk value calculation module is used to calculate and generate the line-to-ground breakdown voltage and the insulator mountain fire flashover voltage of each line grid according to the line bridging conditions of each line grid; calculate and generate the mountain fire tripping risk value of each line grid according to the line-to-ground breakdown voltage and the insulator mountain fire flashover voltage of each line grid; The wildfire tripping risk level determination module is used to determine the wildfire tripping risk level of the transmission line according to the wildfire tripping risk value of each line grid.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method for evaluating the risk of transmission line tripping due to wildfires as described in any one of claims 1 to 7 can be implemented.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it can implement the method for evaluating the risk of wildfire tripping of a power transmission line as described in any one of claims 1 to 7.

Images