Results 21 to 30 of about 158,290 (272)

Development of a system for detecting and locating damaged insulator strings with signals collected at substations [PDF]

, 2015
This paper presents a novel technique for remotely identifying and locating of damaged insulator strings based on an analysis of noise signals recorded on the ground connection of current transformers installed on transmission line substations.
Renato Massoni Capelini, Capelini, Renato Massoni   +1 more
core   +1 more source

Nonlinear Buckling Analysis and Optimization Design of the Y-Type Composite Insulator String

Advances in Civil Engineering, 2022
Under the action of extreme wind load, the overhead transmission line will lead to the fracture of the traditional V-type insulator string, which greatly affects the safety of the power system.
Hua Bao, Lingzhi Xia, Shengcong Chai, Yang Cheng, Songyuan Cao, Zhiwen Lan   +5 more
doaj   +1 more source

Technology of Actual Wind Deviation Monitoring for Suspension Insulator Strings Based on Improved Edge Detection

IEEE Access, 2019
Finding out the wind deviation fault of the insulators of transmission lines in time can not only help people better complete the wind bias warning and prevention work, but also reduce the economic loss and the maintenance difficulty.
Luya Yang, Xinbo Huang, Ye Zhang, Tingting Nie   +3 more
doaj   +1 more source

Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure

Energies, 2011
In the current study, a multi-arc predicting model for DC critical flashover voltage of iced and pre-contaminated long insulator strings under low atmospheric pressure is developed.
Zhijin Zhang, Lichun Shu, Qing Yang, Xingliang Jiang, Caixin Sun, Jianlin Hu   +5 more
doaj   +1 more source

The Observational Signatures of Cosmic Strings [PDF]

, 2009
Cosmic strings were postulated by Kibble in 1976 and, from a theoretical point of view, their existence finds support in modern superstring theories, both in compactification models and in theories with extended additional dimensions.
Riccio, Giuseppe
core   +1 more source

Mechanical Calculation of Flexible Wires of Spans with Different Tensioning Insulator Strings

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2020
In design activities, technical solutions are practiced, which provide for the use of different tension strings of insulators in a single span. The present paper considers the calculation of the sag and load factors for a span with two different ...
Yu. V. Bladyko
doaj   +1 more source

Calculation Method for Dynamic Stiffness of Multispan Overhead Transmission Lines

IEEE Access, 2022
The dynamic motion of a span is coupled to the other spans in transmission lines. From the continuity conditions, force equilibrium conditions, and dynamical equations of every span conductor and insulator string, a close-form expression for the dynamic ...
Lv Zhongbin, Zhang Bo, Liu Xiaohui, Tao Yaguang, Liang Haobo, Li Qing, Yan Bo   +6 more
doaj   +1 more source

Flashover Detection and Anomaly Prediction in Aerial Images of Insulator Strings in Complex Environments

IEEE Access
The normal operation of insulator strings affects the safety and stability of the power system, and insulator string flashover is one of the important faults.
Liping Zhang, Xiao Li, Junmei Zhao, Yewei Zhang, Qiang Zhang   +4 more
doaj   +1 more source

Humidity and Harmonic Current Considerations for Indices to Estimate Contamination Levels on HV Insulators

IEEE Access, 2023
Measuring the leakage current and voltage of an insulator is widely used to calculate indices for the pollution estimation of overhead line insulator strings.
Rodrigo J. Villalobos, Luis A. Moran, Mauricio Inostroza, Alvaro Hoffer, G. Cristian Pesce, Fernando Huenupan   +5 more
doaj   +1 more source

Self-Shattering Defect Detection of Glass Insulators Based on Spatial Features

Energies, 2019
During an automatic power transmission line inspection, a large number of images are collected by unmanned aerial vehicles (UAVs) to detect existing defects in transmission line components, especially insulators.
Haiyan Cheng, Yongjie Zhai, Rui Chen, Di Wang, Ze Dong, Yutao Wang   +5 more
doaj   +1 more source