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
core +1 more source
500kV直流断路器快速机械开关典型故障特性及可靠性提升方法研究 [PDF]
, 2023 直流断路器是构建柔性直流电网不可或缺的关键设备。快速机械开关是直流断路器中承载电流、实现快速分合闸、耐受分闸恢复电压的核心组件，其结构复杂、动作速度快、电气应力严酷、可靠性要求高，因而设计研制难度大，任一环节出现问题均会影响直流断路器乃至柔直电网的安全可靠运行。然而，目前快速机械开关由于存在设计选型不合理、工艺管控不严格、试验考核不完善等问题，导致在实际工程应用中故障率较高。针对已应用于张北柔性直流电网试验示范工程的500 kV直流断路器，分析了直流断路器研制、调试 ...
张涛 +4 more
core +1 more source
基于改进Cascade R-CNN算法的多类型绝缘子缺陷图像联合检测
Dianci bileiqi, 2022 当前输电线路巡检工作主要采用无人机巡检的方式来完成,利用人工智能技术助力巡检图像的缺陷识别已成为趋势。以往绝缘子缺陷检测研究大部分集中于绝缘子爆片类缺陷的检测,提出了一种改进的Cascade R-CNN算法,基于绝缘子缺陷数据建立绝缘子缺陷数据集。该算法主要针对绝缘子爆片、绝缘子电弧烧伤及绝缘子伞裙破损的多类型绝缘子缺陷联合检测。首先,针对目标比例小导致生成的anchor正负样本比例失衡的现象,将损失函数更改为Focal loss;然后引入了RoI Align方法以解决小目标的漏检;通过联合绝缘子串模型,
张欣 +5 more
doaj
Deep reinforcement learning based task allocation mechanism for intelligent inspection in energy Internet [PDF]
, 2021 In order to reduce the cost and improve efficiency of power line inspection, UAV (unmanned aerial vehicle), which use mobile edge computing technology to access and process service data, are used to inspect power lines in the energy internet.However, due
Chao YANG +5 more
core +1 more source
±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
Insulator Detection Method Using YOLO Combining Feature Reuse and Reconstruction [PDF]
To overcome challenges such as low generalization performance and difficulty in identifying insulators amidst complex backgrounds in deep learning-based insulator defect detection methods, this study introduces a novel method based on the You Only Look ...
Lulu YANG, Ping MA, Cong WANG, Xinkai LI, Yue MENG, Hongli ZHANG
core +1 more source
Sexuality, Gender &Policy, Volume 7, Issue 4, Page 348-365, November 2024.Abstract In the armed conflict between Kashmiri militancy and the Indian state forces, Kashmiri women have been relentless victims of abduction, rape, molestation, and cruel objectification by the militaristic patriarchs of both sides. In the context of the state's unaccountability, the rebuttal of justice is horrific in Kashmir.
Payel Pal, Goutam Karmakar
wiley +1 more source
Research on sensing properties and detection technology of FBG embedded in anisotropic material and complex structure [PDF]
, 2011 结构健康监测对于提高工程结构的运营效率，保障人民生命财产安全具有极其重大的意义。光纤光栅以其独特优势成为最具发展前景的埋入式传感器。本文研究光纤光栅埋入各向异性材料与复合结构基体后，光纤光栅与基体的相互作用力；建立基体所受的载荷与埋入式光纤光栅光谱响应的关系；实现埋入式光纤光栅在复杂结构载荷下健康监测。主要研究工作有以下三个方面： 一、研究分析了各向异性材料受轴对称复杂应力载荷或均匀温度载荷时，材料内部的应力与应变分布情况，并对埋设其中的光纤光栅传感特性进行了细致的研究 ...
陈文
core
Data analysis before and after the transformation of Yuanmou Julin geoelectric field [PDF]
Taking the geoelectric field observation data of Yuanmou Julin of Chuxiong Earthquake Monitoring Center Station as the research object, combined with the ideas and specific contents of the two transformations since the geoelectric field observation，the ...
Jianming Shi +4 more
core +1 more source
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
core +1 more source