基于累积灰度模型和随机灰度涨落场的无间隔棒输电线舞动检测

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中图分类号：TP391 文献标志码：A 文章编号：1671-6841（2025）06-0074-09

Abstract： The galoping of transmission lines is a threat to the safty of the power system. Currently，the galloping amplitude was mainly determined by detecting the swing of spacers. However，there was no practical detection method for transmisson lines without spacers.A simple，effective and novel method was proposed for detecting the galoping of transmission lines. Firstly，the background model was built by counting the data of grayscale changes over time. Then，a random grayscale fluctuation field was introduced to describe the random grayscale fluctuations caused by internal and external factors of the camera. The influence of these fluctuations on the background difference was eliminated by combining the 3σ criterion，thus achieving accurate segmentation of the transmission line area.Finally，the movement of the transmission line was mapped to generate a cumulative grayscale model，and its movement amplitude at diferent positions in a short time was calculated. By comparing with the line width of the transmission line itself，a threshold was setto determine the dancing.The algorithm was validated using field data collected by tower cameras，achieving a detection accuracy of 95.5% ，a false positive rate of 5.7% ，and a false negative rate of 2.0% . This method demonstrated strong robustness and applicability.

Key words： transmission line galoping； cumulative gray model； random gray fluctuation field ; back-ground modeling; 3σ criteria

0 引言

输电线舞动是由于空气动力不稳定而诱发的现象，是输电线在不均匀覆冰及风力的作用下引起的一种低频率 （0.1～3Hz⋅ ）、大振幅（约为输电线宽度的5～300倍）的自激振动现象[1]，它的形成主要取决于覆冰、风的激励、线路的结构及参数等。（剩余13606字）