Research Progress of Galloping of Overhead Iced Transmission Lines [PDF]
, 2023 [Introduction] The galloping of transmission lines will lead to trip, worn hardware, broken insulator string, damaged tower-arm and other accidents. In serious cases, collapsed tower accidents may occur.
Guangyun MIN, Xiaohui LIU, Xin ZHAO
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Research on Lightning Performance and Protective Measures of ±800 kV UHVDC Power Transmission Line [PDF]
, 2023 [Introduction] Lightning strike is the primary cause of failures of ±800 kV UHVDC power transmission lines, and the lightning protection assessment of power transmission lines is critical to the safe and stable operation of the system.
Youjun GONG, Zhiwen HE, Ziwei YAN
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Discharge characteristics and discharge simulation model of long air gaps containing a floating conductor [PDF]
, 2022 Long air gaps containing a floating conductor are common insulation types in power grids. During the transmission line live-line work, the process of lineman entering the transmission line air gap constitutes a live-line work combined air gap, which is a
Gao, Jiachen <1995>
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Manipulator dynamic modeling and motion planning for live working robot [PDF]
, 2016 This article is focused on a double-arm and double-manipulator live working robot.The arm motion of the robot for insulator string replacement during the operation process was decomposed.The basic operation dynamic model was established by the Lagrange ...
JIANG Wei +3 more
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Gaoya dianqi, 2022 绝缘子串是输电线路系统中至关重要的器件之一，基于图像处理的绝缘子串识别，能够更快更准确地识别到绝缘子串。针对输电线路中绝缘子串与绝缘子串、绝缘子串与背景之间相互干扰导致目标识别时存在误差较大的问题，提出一种融入注意力机制的YOLOv3绝缘子串识别方法。该方法在YOLOv3模型的基础上，首先在特征提取网络Darknet-53中加入无参注意力SimAM，聚焦网络和增强有效特征，抑制干扰特征，提高网络对绝缘子串的注意能力；其次根据绝缘子串的形状特征，调整模型预设Anchor box的值；最后以焦点损失 ...
李季 +4 more
doaj
Detection Algorithm for Insulators and Foreign Objects on Transmission Lines Based on Unmanned Aerial Vehicle Inspection [PDF]
ObjectivesTraditional power grid inspection methods suffer from high labor intensity and low efficiency. Taking Shandong Golden Power Grid as the research object, this study proposes an inspection algorithm using unmanned aerial vehicle (UAV) based on ...
MENG Xiangzhong +4 more
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±800 kV输电线路直流绝缘子串分布电导模型及其对电压和泄漏电流的影响研究
Gaoya dianqi, 2020 直流绝缘子串泄漏电流不仅是绝缘子金具腐蚀的主要原因,同时也是在线监测的一项重要指标。为了研究直流绝缘子串上不同位置绝缘子金具上的泄漏电流的组成及分布特性,文中建立了直流绝缘子串三维有限元模型,研究了绝缘子串上金具对导线、大地,以及绝缘子金具之间的电导,分析了绝缘子金具处泄漏电流的影响因素及分布特性。结果表明:直流绝缘子串不同位置金具上的泄漏电流存在较大的差异;绝缘子金具泄漏电流分为沿面泄漏电流和空间泄漏电流,沿面泄漏电流沿着绝缘子串表面流动,空间泄漏电流的一部分在绝缘子金具、空气、杆塔、大地之间流动 ...
曹晓斌 +4 more
doaj
Research on Insulator Detection Algorithm for High-Speed Rail Contact Network [PDF]
To satisfy the requirements of intelligent inspection at a greater level, a rotated insulator target detection algorithm based on the improved YOLOv5 is proposed to solve the inadequacy of conventional detection algorithms used for contact networks in ...
LIU Shibing, ZHOU Shihan
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Research of High Voltage Switchgear Appliance Based on Ultraviolet Detection [PDF]
, 2014 伴随着我国智能电网规模的不断扩大，对电力系统的安全运行要求越来越 高，同时，因高压放电引起的电网事故尤其是因绝缘问题造成的事故发生也在逐 渐增多。据相关专业部门的统计分析，目前因绝缘问题导致的电力系统事故占所 有电力事故中的第二位，因事故造成的经济损失、影响范围不可估量。 故采用先进有效的检测技术，预先发现和处理绝缘缺陷或线路隐患，对高压 电气设备的维护、修理、防止事故发生具有深刻的意义。本文在分析国内外大量 文献的基础上，基于紫外检测技术、高压电气设备放电原理，研究了以日盲区紫 外光信号为特征的 ...
邢文涛
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Key method of digitization of power distribution panel with artificial intelligence identification for power communication network [PDF]
To enhance the operational management efficiency of the power communication network, artificial intelligence technology was utilized to develop a digitalization method for distribution panels within the communication power system.
CHEN Yitong +4 more
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