CN-121994689-A - Tower body main material corrosion damage test detection method and system applied to intelligent power grid

Abstract

The invention provides a tower body main material corrosion damage test detection method and system applied to an intelligent power grid, and relates to the technical field of power transmission line state monitoring and detection. The method comprises the steps of inputting tower positions and corrosion environment information to determine an intention detection tower position, calculating a non-equidistant hanging piece position set according to a vertical height variable of an iron tower and an atmospheric pollution grade coefficient based on a water vapor density distribution rule, realizing regular homotype hanging pieces with dense tower tops and sparse tower bottoms, regularly sampling hanging piece components, obtaining physical and chemical detection data in a corrosion damage state through physical and chemical detection, digitally fitting the detection data to obtain a temporal function, and constructing a temporal corrosion development curve of a typical tower position main material. The method breaks the limitation of traditional experience detection, can accurately capture the nonlinear corrosion evolution rule of the iron tower in the vertical space, and greatly improves the accuracy and the prediction capability of outdoor objective detection.

Inventors

• HE SONGYANG
• JIANG YAXIN
• GONG TAO
• LI LIN
• YU BIN
• LIAO XINGJUN
• TANG HUAN
• LI ZHONG
• HE JIANGHUA
• ZHANG YANGBIN
• LI LEI
• MA HAIYUN
• WANG BO
• ZHANG LIRU
• DONG BIXIA
• HAN DAGANG
• CHEN QIANG
• HE WENJUN
• PU FAN
• ZHENG YONG
• HUANG XING
• LIU XIANGYUN

Assignees

• 中国电力工程顾问集团西南电力设计院有限公司

Dates

Publication Date

20260508

Application Date

20260407

Claims (10)

1. 1. A tower body main material corrosion damage test detection method applied to an intelligent power grid is characterized by comprising the following steps: inputting tower position path information and corrosion environment information, and determining an intention objective detection tower position; determining hanging piece positions of the intention objective detection tower on the vertical height according to a vertical hanging piece position selection criterion based on a water vapor density distribution rule, wherein the hanging piece positions are determined based on the height of the iron tower and an atmospheric pollution grade coefficient in a calculating way; determining the hanging piece size and model of each hanging piece point according to the specification and model of the main material component at the hanging piece position, and determining the thickness of the galvanized coating of the hanging piece component based on the actual thickness of the galvanized coating of the main material component and the preset thickness of the detected reserved galvanized coating; Placing a hanging piece component at the determined hanging piece position, periodically sampling the hanging piece component, and sending a sampling test piece to a physical and chemical detection platform to obtain physical detection data and chemical detection data of the hanging piece component in a corrosion damage state; And performing digital fitting on the physical detection data and the chemical detection data to obtain a temporal function of corrosion data and time, and constructing a temporal corrosion development curve of the objective detection tower main material.
2. 2. The method for detecting corrosion damage test of tower main material applied to smart power grid according to claim 1, wherein the method for determining the hanging piece position comprises the following steps: Wherein, the Representing an array of positions to be hung of the iron tower in the height direction; Representing a high corrosion influence factor function, relating to the height of the iron tower and the atmospheric pollution level of the environment where the iron tower is located, wherein int represents rounding operation, and C represents atmospheric pollution level coefficient.
3. 3. The method for detecting corrosion damage of a tower main material applied to a smart grid according to claim 2, wherein the function of the high corrosion influence factor is expressed as: Wherein, the The height is shown in the range of , Representing the maximum height of the pylon.
4. 4. The method for detecting corrosion damage of main tower materials applied to intelligent power grids according to claim 3, wherein the higher the atmospheric pollution level of the environment where the iron tower is located is, the larger the value of the atmospheric pollution level coefficient is.
5. 5. The method for detecting corrosion damage test of tower body main material applied to smart power grid according to claim 1, wherein the method for calculating thickness of the coated zinc coating of the hanging piece member comprises the following steps: Wherein, the Indicating the thickness of the coated zinc coating layer of the hanging piece component; the thickness of the actual galvanized layer of the iron tower component corresponding to the position of the hanging piece component; the thickness of the galvanized layer is reserved for detection.
6. 6. The method for detecting corrosion damage test of tower body main materials applied to intelligent power grid according to claim 1, wherein the value of the thickness of the reserved galvanized layer is related to the humidity of the area where the reserved galvanized layer is located, and the higher the humidity is, the larger the value is.
7. 7. The method for detecting corrosion damage test of tower body main materials applied to intelligent power grids according to claim 1 is characterized in that the physical detection data are obtained through appearance and metallographic tests and comprise metallographic data, carbon equivalent data and Zn layer thickness, and the chemical detection data are obtained through chemical element analysis and comprise Zn element content and Fe element content.
8. 8. The method for detecting corrosion damage test of tower body main materials applied to intelligent power grids according to claim 1, wherein the number of hanging pieces arranged on the vertical height corresponding to the same hanging piece position is not more than two.
9. 9. A tower main material corrosion damage test detection system applied to a smart power grid for implementing the method of any one of claims 1 to 8, comprising: The typical tower position screening module is used for determining the intention objective detection tower position after inputting the tower position path information; The typical tower position hanging piece position selection module is used for receiving the typical tower position data stream transmitted by the typical tower position screening module and determining a hanging piece position set of the iron tower on the vertical height according to the vertical hanging piece position selection criterion based on the water vapor density distribution rule; The physical and chemical detection platform is used for carrying out physical detection tests and chemical detection tests on the hanging piece test pieces sampled at regular intervals to obtain physical detection data and chemical detection data in the corrosion damage state; The corrosion data fitting center is used for receiving the detection result data stream transmitted by the physicochemical detection platform, digitally fitting the physical detection data and the chemical detection data, and constructing a temporal corrosion development curve of the objective detection tower position main material; and the output terminal is used for receiving the result data transmitted by the corrosion data fitting center and outputting a detection conclusion.
10. 10. The tower body main material corrosion damage test detection system applied to the smart grid according to claim 9, wherein a hanging piece position calculation model is preset in the typical tower position hanging piece position selection module, a high corrosion influence factor curve is generated by the calculation model by taking a vertical height variable of an iron tower and an atmospheric pollution grade coefficient as input variables, and the hanging piece position set is calculated by extracting integer points on the curve, so that hanging piece points are densely distributed in a tower top area with high corrosion degree, and sparsely distributed in a tower bottom area with low corrosion degree.

Description

Tower body main material corrosion damage test detection method and system applied to intelligent power grid Technical Field The invention relates to the technical field of power transmission line state monitoring and detection, in particular to a tower body main material corrosion damage test detection method applied to an intelligent power grid. Background With the continuous promotion of intelligent power grid construction and the continuous expansion of power grid scale, the early-stage power transmission line put into operation gradually steps into an aging stage. In order to accelerate the digital process of the power transmission line and promote the sustainable development of the stock market, the safe and stable operation of the power grid is ensured, and the accurate corrosion damage detection of in-service power transmission tower components is particularly important. The power transmission tower is exposed in a complex field natural environment for a long time, and is subjected to comprehensive alternating actions of various factors such as atmospheric pollution, meteorological conditions and the like, and the metal main material is extremely easy to corrode and damage, so that the mechanical bearing capacity and the safe service life of the whole structure are directly threatened. The current industry mainly comprises two directions of indoor rapid detection and outdoor objective detection for corrosion damage detection of in-service power transmission tower components. In the aspect of indoor rapid detection, although a deeper research is carried out at present, the theoretical corrosion resistance of a material can be rapidly obtained through accelerated corrosion means such as a salt spray test, and the like, the laboratory environment is difficult to truly and comprehensively restore complex microclimate, variable pollutants, specific electromagnetic field coupling and other comprehensive working conditions of a power transmission tower in actual field service, so that the indoor detection result and the actual corrosion damage evolution of line engineering are often disjointed. In the aspect of more critical outdoor objective detection, the current common practice is to regularly climb the iron tower by operation and maintenance personnel, and perform apparent detection by using naked eyes or assisting in empirical modes such as a simple handheld tool. The conventional outdoor objective detection means have great limitations. On the one hand, the aloft work is limited by weather and subjective experience of personnel, and the efficiency is low by relying on manual inspection alone, and the obtained outdoor objective detection result is large in error and inaccurate, so that standardized, continuous and traceable quantitative data are difficult to form. On the other hand, the defect is that the research finds that the corrosion environment of the power transmission tower in the vertical space has obvious nonlinear difference. Specifically, the special comprehensive environment is very easy to cause micro-battery effect on the metal surface and remarkably accelerate electrochemical corrosion process due to the nonlinear distribution rule of the vapor density from the near surface to the high altitude and the dense strong electromagnetic environment formed by the erection of the ground wire and the lead wire at the top of the power transmission tower, so that the corrosion rates from the top to the bottom of the power transmission tower are quite different. The existing conventional detection or random sampling completely ignores the space corrosion heterogeneity caused by the height change, and the unquantized apparent detection cannot scientifically reflect the real corrosion evolution rule of the iron tower from top to bottom. In view of the above, there is no accurate, efficient and standardized detection method in the industry to cope with the problem of corrosion heterogeneity in the vertical dimension of the power transmission tower. The lack of long-term and regular time corrosion test data support which is suitable for the practical environment makes the management department unable to accurately predict the corrosion trend of the iron tower, which severely restricts the fine and intelligent development of the intelligent power grid operation and maintenance system. Disclosure of Invention The present invention aims to solve at least one of the above technical problems in the prior art. Therefore, the first aspect of the invention provides a tower body main material corrosion damage test detection method applied to a smart power grid. The second aspect of the invention provides a tower body main material corrosion damage test detection system applied to a smart power grid. The invention provides a tower body main material corrosion damage test detection method applied to an intelligent power grid, which comprises the following steps: inputting tower position path information and corr