CN-115713042-B - Wind deflection angle prediction method and device for jumper wire of power transmission line

CN115713042BCN 115713042 BCN115713042 BCN 115713042BCN-115713042-B

Abstract

The invention discloses a wind deflection angle prediction method and device for a power transmission line jumper, which are used for obtaining an initial finite element model by obtaining and modeling the power transmission line jumper based on a horizontal wind load in a vertical wire direction, a vertical wind load in a vertical wire direction and a jumper rain load of the power transmission line jumper, dividing wind deflection angle data under a plurality of preset working conditions obtained through the initial finite element model into a model training data set and a model prediction data set, training a BP neural network model based on the model training data set to obtain an initial wind deflection angle calculation model, inputting the model prediction data set into the initial wind deflection angle calculation model to conduct wind deflection angle prediction to obtain an optimal wind deflection angle calculation model, and obtaining real-time wind speed, real-time wind direction and real-time rainfall intensity into the optimal wind deflection angle calculation model to obtain a wind deflection angle prediction value.

Inventors

WEI RUIZENG
HE HUAN
WANG LEI
LUO YINGTING
ZHOU ENZE
LIU SHUQIN
E shenglong
XU HAILIN
JIANG JUNFEI

Assignees

广东电网有限责任公司
广东电网有限责任公司电力科学研究院

Dates

Publication Date: 20260512
Application Date: 20221128

Claims (8)

1. The wind deflection angle prediction method for the jumper wire of the power transmission line is characterized by comprising the following steps of: the method comprises the steps of obtaining horizontal wind load in the direction of a vertical wire of a jumper of a power transmission line, vertical wind load in the direction of the vertical wire and jumper rain load, wherein the specific calculation process of the jumper rain load is as follows: The method comprises the steps of obtaining and inputting a first wind speed, a raindrop diameter, a jumper height position, a jumper height, the number of raindrops in unit volume, a wind pressure height change coefficient and rainfall intensity of a parameter reference height of 10m into a preset jumper rain load calculation formula to obtain a jumper rain load, wherein the preset jumper rain load calculation formula is as follows: ; ; ; In the formula, Is a first wind speed, Is the diameter of raindrops, Is a jumper at the height, Is the jumper height, Is the number of raindrops in unit volume, Is a wind pressure height change coefficient, In order for the intensity of the rainfall to be, For the rain-facing area of the jumper wire, The jumper length is; Modeling the jumper of the power transmission line according to the horizontal wind load in the vertical wire direction, the vertical wind load in the vertical wire direction and the jumper rain load to obtain an initial finite element model; Acquiring wind deflection angle data under a plurality of preset working conditions based on the initial finite element model, and dividing the wind deflection angle data into a model training data set and a model prediction data set, wherein the preset working conditions comprise wind speed, wind direction and rainfall intensity; Training a BP neural network model based on the model training data set to obtain an initial wind deflection angle calculation model, and inputting the model prediction data set into the initial wind deflection angle calculation model to perform wind deflection angle prediction to obtain an optimal wind deflection angle calculation model; And acquiring and inputting the real-time wind speed, the real-time wind direction and the real-time rainfall intensity into the optimal windage angle calculation model to obtain a windage angle predicted value.
2. The method for predicting the wind deflection angle of a power transmission line jumper according to claim 1, wherein the method for obtaining the horizontal wind load in the vertical wire direction and the vertical wind load in the vertical wire direction of the power transmission line jumper specifically comprises: The method comprises the steps of obtaining and inputting a first wind speed, a wire outer diameter, a jumper span, a wind pressure non-uniformity coefficient, a wind pressure height change coefficient, a wire body shape coefficient, a wind load adjustment coefficient and a wind load increase coefficient with a parameter reference height of 10m into a preset vertical wire direction horizontal wind load calculation formula to obtain a vertical wire direction horizontal wind load, wherein the preset vertical wire direction horizontal wind load calculation formula is as follows: = ; In the formula, Is a first wind speed, Is the outer diameter of the wire, Is a jumper span, Is a wind pressure non-uniformity coefficient, Is a wind pressure height change coefficient, Is the body form coefficient of the lead, Adjusting the coefficient for wind load, Increasing the coefficient for wind load; Obtaining a wind direction angle with a parameter reference height of 10m, and inputting the wind direction angle and the vertical wind load in the vertical wire direction into a preset vertical wind load calculation formula in the vertical wire direction to obtain the vertical wind load in the vertical wire direction, wherein the preset vertical wind load calculation formula in the vertical wire direction is as follows: ; In the formula, Is the wind direction angle.
3. The method for predicting the wind deflection angle of the jumper of the power transmission line according to claim 1, wherein the model prediction data set is input into the initial wind deflection angle calculation model for wind deflection angle prediction, so as to obtain an optimal wind deflection angle calculation model, and the method specifically comprises the following steps: Inputting the model prediction data set into the initial wind deflection angle calculation model to obtain a sample prediction value corresponding to each prediction data sample in the model prediction data set; Inputting the sample predicted value into an average relative error calculation formula to obtain an average relative error value; And comparing the average relative error value with a preset average relative error threshold value, and setting the current initial windage yaw calculation model as an optimal windage yaw calculation model when the average relative error value is smaller than the preset average relative error threshold value.
4. The wind deflection angle prediction device of the power transmission line jumper is characterized by comprising a load calculation module, a finite element modeling module, a model data dividing module, an optimal wind deflection angle calculation model construction module and a wind deflection angle prediction module; the load calculation module is used for acquiring horizontal wind load in the direction of a vertical wire of the jumper of the power transmission line, vertical wind load in the direction of the vertical wire and jumper rain load; The specific process for obtaining the jumper rain load of the electric transmission line jumper comprises the steps of obtaining and inputting a first wind speed, a raindrop diameter, a jumper height position, a jumper height, the number of raindrops in a unit volume, a wind pressure height change coefficient and rainfall intensity of a parameter reference height of 10m into a preset jumper rain load calculation formula to obtain the jumper rain load, wherein the preset jumper rain load calculation formula is as follows: ; ; ; In the formula, Is a first wind speed, Is the diameter of raindrops, Is a jumper at the height, Is the jumper height, Is the number of raindrops in unit volume, Is a wind pressure height change coefficient, In order for the intensity of the rainfall to be, For the rain-facing area of the jumper wire, The jumper length is; The finite element modeling module is used for modeling the jumper of the power transmission line according to the horizontal wind load in the vertical wire direction, the vertical wind load in the vertical wire direction and the jumper rain load to obtain an initial finite element model; the model data dividing module is used for acquiring wind deflection angle data under a plurality of preset working conditions based on the initial finite element model, and dividing the wind deflection angle data into a model training data set and a model prediction data set, wherein the preset working conditions comprise wind speed, wind direction and rainfall intensity; The optimal wind deflection angle calculation model construction module is used for training the BP neural network model based on the model training data set to obtain an initial wind deflection angle calculation model, and inputting the model prediction data set into the initial wind deflection angle calculation model to perform wind deflection angle prediction to obtain an optimal wind deflection angle calculation model; The wind deflection angle prediction module is used for acquiring and inputting the real-time wind speed, the real-time wind direction and the real-time rainfall intensity into the optimal wind deflection angle calculation model to obtain a wind deflection angle prediction value.
5. The wind deflection angle prediction device for a power transmission line jumper according to claim 4, wherein the load calculation module is configured to obtain a horizontal wind load in a vertical wire direction and a vertical wind load in a vertical wire direction of the power transmission line jumper, and specifically comprises: The method comprises the steps of obtaining and inputting a first wind speed, a wire outer diameter, a jumper span, a wind pressure non-uniformity coefficient, a wind pressure height change coefficient, a wire body shape coefficient, a wind load adjustment coefficient and a wind load increase coefficient with a parameter reference height of 10m into a preset vertical wire direction horizontal wind load calculation formula to obtain a vertical wire direction horizontal wind load, wherein the preset vertical wire direction horizontal wind load calculation formula is as follows: = ; In the formula, Is a first wind speed, Is the outer diameter of the wire, Is a jumper span, Is a wind pressure non-uniformity coefficient, Is a wind pressure height change coefficient, Is the body form coefficient of the lead, Adjusting the coefficient for wind load, Increasing the coefficient for wind load; Obtaining a wind direction angle with a parameter reference height of 10m, and inputting the wind direction angle and the vertical wind load in the vertical wire direction into a preset vertical wind load calculation formula in the vertical wire direction to obtain the vertical wind load in the vertical wire direction, wherein the preset vertical wind load calculation formula in the vertical wire direction is as follows: ; In the formula, Is the wind direction angle.
6. The wind deflection angle prediction device of the power transmission line jumper according to claim 4, wherein the optimal wind deflection angle calculation model construction module is configured to input the model prediction data set into the initial wind deflection angle calculation model to perform wind deflection angle prediction, so as to obtain an optimal wind deflection angle calculation model, and specifically comprises: Inputting the model prediction data set into the initial wind deflection angle calculation model to obtain a sample prediction value corresponding to each prediction data sample in the model prediction data set; Inputting the sample predicted value into an average relative error calculation formula to obtain an average relative error value; And comparing the average relative error value with a preset average relative error threshold value, and setting the current initial windage yaw calculation model as an optimal windage yaw calculation model when the average relative error value is smaller than the preset average relative error threshold value.
7. A terminal device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the wind deflection angle prediction method of a transmission line jumper according to any of claims 1 to 3 when the computer program is executed.
8. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored computer program, wherein the computer program when run controls a device in which the computer readable storage medium is located to execute the wind deflection angle prediction method of the transmission line jumper according to any of claims 1 to 3.

Description

Wind deflection angle prediction method and device for jumper wire of power transmission line Technical Field The invention relates to the technical field of power transmission lines, in particular to a wind deflection angle prediction method and device for a jumper of a power transmission line. Background The existing wind deflection monitoring of the power transmission line is generally based on analyzing received numerical value weather data, determining an included angle between the power transmission line and the wind direction and random wind speed, calculating random wind load and horizontal displacement of the power transmission line, finally determining a dynamic wind deflection angle of an insulator, forecasting the wind deflection state of the power transmission line, and realizing wind deflection forecasting of the power transmission line based on the numerical value weather data and the dynamic wind deflection angle of the insulator or acquiring corresponding information and calculating to obtain the simulated wind deflection angle of the power transmission line based on dynamic wind by using a dynamic wind velocity simulation model and a wind deflection angle calculation model. The existing power transmission line wind deflection monitoring technology does not consider the influence of rainfall on the wind deflection angle of the jumper, and does not establish a finite element model aiming at the wind deflection angle of the jumper, so that the obtained model is not accurate enough, and further the subsequently obtained wind deflection angle error of the power transmission line is larger. Disclosure of Invention The invention aims to solve the technical problem of providing a wind deflection angle prediction method and device for a jumper of a power transmission line, and improving the accuracy and efficiency of obtaining the wind deflection angle of the jumper of the power transmission line. In order to solve the technical problems, the invention provides a wind deflection angle prediction method of a jumper of a power transmission line, which comprises the following steps: Obtaining a horizontal wind load in the direction vertical to a vertical wire of a jumper of a power transmission line and a vertical wind load in the direction vertical to the wire and a jumper rain load; Modeling the jumper of the power transmission line according to the horizontal wind load in the vertical wire direction, the vertical wind load in the vertical wire direction and the jumper rain load to obtain an initial finite element model; Acquiring wind deflection angle data under a plurality of preset working conditions based on the initial finite element model, and dividing the wind deflection angle data into a model training data set and a model prediction data set, wherein the preset working conditions comprise wind speed, wind direction and rainfall intensity; Training a BP neural network model based on the model training data set to obtain an initial wind deflection angle calculation model, and inputting the model prediction data set into the initial wind deflection angle calculation model to perform wind deflection angle prediction to obtain an optimal wind deflection angle calculation model; And acquiring and inputting the real-time wind speed, the real-time wind direction and the real-time rainfall intensity into the optimal windage angle calculation model to obtain a windage angle predicted value. In one possible implementation manner, obtaining a horizontal wind load in a vertical wire direction and a vertical wind load in a vertical wire direction of a jumper of a power transmission line specifically includes: The method comprises the steps of obtaining and inputting a first wind speed, a wire outer diameter, a jumper span, a wind pressure non-uniformity coefficient, a wind pressure height change coefficient, a wire body shape coefficient, a wind load adjustment coefficient and a wind load increase coefficient with a parameter reference height of 10m into a preset vertical wire direction horizontal wind load calculation formula to obtain a vertical wire direction horizontal wind load, wherein the preset vertical wire direction horizontal wind load calculation formula is as follows: Wherein v 1 is a first wind speed, D is the outer diameter of a wire, L is the span of a jumper, alpha is the wind pressure non-uniformity coefficient, u 1 is the wind pressure height change coefficient, u 2 is the body shape coefficient of the wire, beta is the wind load adjustment coefficient, and A is the wind load increase coefficient; Obtaining a wind direction angle with a parameter reference height of 10m, and inputting the wind direction angle and the vertical wind load in the vertical wire direction into a preset vertical wind load calculation formula in the vertical wire direction to obtain the vertical wind load in the vertical wire direction, wherein the preset vertical wind load calculation formula in the vertical